You searched for subject:(Variability).
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University of Waterloo
1.
Neale, Adam.
Digital Timing Control in SRAMs for Yield Enhancement and Graceful Aging Degradation.
Degree: 2010, University of Waterloo
URL: http://hdl.handle.net/10012/5355 
► Embedded SRAMs can occupy the majority of the chip area in SOCs. The increase in process variation and aging degradation due to technology scaling can…
(more)
▼ Embedded SRAMs can occupy the majority of the chip area in SOCs. The increase in
process variation and aging degradation due to technology scaling can severely compromise the integrity of SRAM memory cells, hence resulting in cell failures. Enough cell failures in a memory can lead to it being rejected during initial testing, and hence decrease the manufacturing yield. Or, as a result of long-term applied stress, lead to in-field system failures. Certain types of cell failures can be mitigated through improved timing control. Post-fabrication programmable timing can allow for after-the-fact calibration of timing signals on a per die basis. This allows for a SRAM's timing signals to be generated based on the characteristics specific to the individual chip, thus allowing for an increase in yield and reduction in in-field system failures.
In this thesis, a delay line based SRAM timing block with digitally programmable timing signals has been implemented in a 180 nm CMOS technology. Various timing-related cell failure mechanisms including: 1). Operational Read Failures, 2). Cell Stability Failures, and 3). Power Envelope Failures are investigated. Additionally, the major contributing factors for process variation and device aging degradation are discussed in the context of SRAMs. Simulations show that programmable timing can be used to reduce cell failure rates by over 50%.
Subjects/Keywords: SRAM; variability
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APA (6th Edition):
Neale, A. (2010). Digital Timing Control in SRAMs for Yield Enhancement and Graceful Aging Degradation. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/5355
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Neale, Adam. “Digital Timing Control in SRAMs for Yield Enhancement and Graceful Aging Degradation.” 2010. Thesis, University of Waterloo. Accessed February 27, 2020.
http://hdl.handle.net/10012/5355.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Neale, Adam. “Digital Timing Control in SRAMs for Yield Enhancement and Graceful Aging Degradation.” 2010. Web. 27 Feb 2020.
Vancouver:
Neale A. Digital Timing Control in SRAMs for Yield Enhancement and Graceful Aging Degradation. [Internet] [Thesis]. University of Waterloo; 2010. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10012/5355.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Neale A. Digital Timing Control in SRAMs for Yield Enhancement and Graceful Aging Degradation. [Thesis]. University of Waterloo; 2010. Available from: http://hdl.handle.net/10012/5355
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Sampath, Akila.
An Investigation Of The Impact Of Enso On Regional Climate Over The Northern Great Plains.
Degree: MS, Atmospheric Sciences, 2017, University of North Dakota
URL: https://commons.und.edu/theses/2143
► Using ground-based observations, as well as reanalysis and Coupled Model Intercomparison Project Phase 5 (CMIP5) data, the long-term changes in precipitation and surface temperature…
(more)
▼ Using ground-based observations, as well as reanalysis and Coupled Model Intercomparison Project Phase 5 (CMIP5) data, the long-term changes in precipitation and surface temperature are studied for the Northern Great Plains (NGP) region for the period of 1965-2005. Significant positive trends of ~1-2 °C/41 years in annual mean temperature are found across North Dakota and Minnesota. This study also suggests that the eastern part of the NGP region is wetter than the western part of the NGP, for the past 41 years. In addition, the spatial-temporal changes of precipitation and temperature of the region, as well as their linkages to Multivariate El-Niño-Southern Oscillation (ENSO) Index (MEI), are investigated through empirical orthogonal function (EOF) analysis using reanalysis and CMIP5 data. The NGP’s temperature field exhibits larger increasing trends in the winter season, while the largest variations in precipitation are found for the summer season. This study further indicates that MEI is positively correlated with winter temperature in North Dakota, and ENSO could also be associated with variations in summer precipitation of the NGP region.
Advisors/Committee Members: Dr. Jianglong Zhang.
Subjects/Keywords: Climate Variability
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APA (6th Edition):
Sampath, A. (2017). An Investigation Of The Impact Of Enso On Regional Climate Over The Northern Great Plains. (Masters Thesis). University of North Dakota. Retrieved from https://commons.und.edu/theses/2143
Chicago Manual of Style (16th Edition):
Sampath, Akila. “An Investigation Of The Impact Of Enso On Regional Climate Over The Northern Great Plains.” 2017. Masters Thesis, University of North Dakota. Accessed February 27, 2020.
https://commons.und.edu/theses/2143.
MLA Handbook (7th Edition):
Sampath, Akila. “An Investigation Of The Impact Of Enso On Regional Climate Over The Northern Great Plains.” 2017. Web. 27 Feb 2020.
Vancouver:
Sampath A. An Investigation Of The Impact Of Enso On Regional Climate Over The Northern Great Plains. [Internet] [Masters thesis]. University of North Dakota; 2017. [cited 2020 Feb 27].
Available from: https://commons.und.edu/theses/2143.
Council of Science Editors:
Sampath A. An Investigation Of The Impact Of Enso On Regional Climate Over The Northern Great Plains. [Masters Thesis]. University of North Dakota; 2017. Available from: https://commons.und.edu/theses/2143
University of Connecticut
3.
Casey, Kelly A.
Effects of Auditory and Visual Variability on Word Learning in Children: A Pilot Study.
Degree: MA, Speech, Language, and Hearing Sciences, 2015, University of Connecticut
URL: https://opencommons.uconn.edu/gs_theses/731
► For infants, acquiring vocabulary for nouns is a dynamic, complex process that involves pairing an auditory token with a visual referent. This process is…
(more)
▼ For infants, acquiring vocabulary for nouns is a dynamic, complex process that involves pairing an auditory token with a visual referent. This process is computationally complex because the acoustic information produced for a verbal production of any given noun varies considerably due to factors including the person who is speaking, speaking rate, and linguistic context. Likewise, visual referents are also variable in characteristics such as size, shape, material, and color. Research suggests that
variability in either the auditory or visual domains can facilitate early word learning. However, the role of simultaneous
variability in these domains on noun learning remains unexplored. Using a 9-week training study, we examined the effects of auditory and visual
variability on word learning and generalization in 12 children ages 16- to 23-months in order to collect pilot data for a larger-scale investigation. All children were taught 12 nouns and were randomly assigned to one of four training conditions: low visual and low auditory
variability, low visual and high auditory
variability, high visual and low auditory
variability, or high visual and high auditory
variability. High versus low auditory
variability was manipulated by presenting ten talkers versus one talker, respectively. High versus low visual
variability was manipulated by presenting variable, dissimilar exemplars versus highly similar exemplars, respectively. The results to date suggest that high levels of
variability in the visual domain facilitated learning of trained items but did not influence the ability to generalize that category to novel visual exemplars. Moreover, overall vocabulary development appeared to be facilitated by high
variability in the auditory domain. These findings provide promising pilot data for understanding how visual and auditory
variability influence word learning not only in the laboratory, but also in the real-world linguistic environment.
Advisors/Committee Members: Bernard G. Grela, Tammie J. Spaulding, Rachel M. Theodore.
Subjects/Keywords: auditory variability; visual variability; word learning; children
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APA (6th Edition):
Casey, K. A. (2015). Effects of Auditory and Visual Variability on Word Learning in Children: A Pilot Study. (Masters Thesis). University of Connecticut. Retrieved from https://opencommons.uconn.edu/gs_theses/731
Chicago Manual of Style (16th Edition):
Casey, Kelly A. “Effects of Auditory and Visual Variability on Word Learning in Children: A Pilot Study.” 2015. Masters Thesis, University of Connecticut. Accessed February 27, 2020.
https://opencommons.uconn.edu/gs_theses/731.
MLA Handbook (7th Edition):
Casey, Kelly A. “Effects of Auditory and Visual Variability on Word Learning in Children: A Pilot Study.” 2015. Web. 27 Feb 2020.
Vancouver:
Casey KA. Effects of Auditory and Visual Variability on Word Learning in Children: A Pilot Study. [Internet] [Masters thesis]. University of Connecticut; 2015. [cited 2020 Feb 27].
Available from: https://opencommons.uconn.edu/gs_theses/731.
Council of Science Editors:
Casey KA. Effects of Auditory and Visual Variability on Word Learning in Children: A Pilot Study. [Masters Thesis]. University of Connecticut; 2015. Available from: https://opencommons.uconn.edu/gs_theses/731
Univerzitet u Beogradu
4.
Pestorić, Branka Š. 1984-.
Dinamika zajednica zooplanktona u Bokokotorskom
zalivu.
Degree: Biološki fakultet, 2014, Univerzitet u Beogradu
URL: https://fedorabg.bg.ac.rs/fedora/get/o:7139/bdef:Content/get
► Ekologija - Marinska ekologija / Ecology -Marine ecology Datum odbrane: 03.06.2013.
Istraživanje zooplanktona obuhvatilo je analizu kvalitativnog i kvantitativnog sastava kao i određivanje vremenske i…
(more)
▼ Ekologija - Marinska ekologija / Ecology -Marine
ecology Datum odbrane: 03.06.2013.
Istraživanje zooplanktona obuhvatilo je analizu
kvalitativnog i kvantitativnog sastava kao i određivanje vremenske
i prostorne distribucije zooplanktona, pojedinih grupa i njihovih
vrsta na području Bokokotorskog zaliva. Istraživanje je obavljeno
na tri lokaliteta u Kotorskom, dva u Tivatskom i jednom lokalitetu
u Hercegnovskom zalivu. Uzorci su sakupljeni planktonskom mrežom
promjera okaca 125μm, jednim potezom od dna do površine.
Uzorkovanje je vršeno sedmično, 15-dnevno i mjesečno, sa ciljem da
se objasni velika brzina promjene brojnosti i distribucije
zooplanktona u plitkim oblastima. Tokom 16-mjesečnog istraživanja
mezozooplanktona Bokokotorskog zaliva određen je 81 takson iz
ukupno 7 filuma. U Kotorskom zalivu je nađeno 69 taksona, u
Tivatskom 70, dok su u Hercegnovskom zalivu zabilježena 72 taksona.
Godišnja dinamika ukupne gustine na sva tri područja (Kotorski,
Tivatski i Hercegnovski zaliv) pokazala je povećanje u toplijem
dijelu godine. Uzrok visokih vrijednosti u ljetnjim mjesecima na
području Kotorskog zaliva bila je pojava protozoe Noctiluca
scintillans sa velikim gustinama populacije, kao i razvoj
kladocera. Razvoj kladocera bio je i razlog ljetnjeg maksimuma u
Tivatskom i Hercegnovskom zalivu, dok se zimski maksimum u
Hercegnovskom zalivu javio kao posljedica velike gustine populacija
kopepoda. Dominantna grupa zooplanktona bile su kopepode. Srednja
procentualna zastupljenost iznosila je 67% u Kotorskom, 73% u
Tivatskom i 81% u Hercegnovskom zalivu. Takosoni Oncaeidae i
Oithona nana su dominirali u sastavu kopepoda na svim lokalitetima
u istraživanom periodu. Maksimalnim gustinama kopepoda prethodile
su visoke vrijednosti gustine fitoplanktona. Pojava velike gustine
populacije ktenofore Bolinopsis vitrea u Kotorskom zalivu,
predstavlja prvi takav nalaz u južnom Jadranu, kao i prvu masovnu
pojavu ove vrste u Mediteranu. Visoka negativna korelacija između
B. vitrea i kopepoda potvrđuje činjenicu da su ktenofore vrlo bitni
predatori čija aktivnost za posljedicu može imati značajan uticaj
na zooplanktonske zajednice. VII Rezultati ovog istraživanja su
pokazali da je u obalnim područjima korišćenje planktonske mreže
promjera okaca 125 μm neophodno za dobijanje preciznijih
vrijednosti ukupnog zooplanktona, jer najveći udio predstavljaju
rani razvojni stadijumi malih kalanoida i ciklopoida koji prolaze
kroz mreže grubljeg tkanja. Velike varijacije vrijednosti u svim
sezonama, posebno kopepoda, sugerišu da je za bolje razumijevanje
procesa u ovako produktivnim sistemima potrebno uzimati uzorke
češće od jednom mjesečno. Istraživanja ukazuju i na to da brze
promjene hidrografskih i produkcijskih parametara u zatvorenom i
eutrofnom Bokokotorskom zalivu značajno utiču na gustine populacija
zooplanktona.
Advisors/Committee Members: Krpo-Ćetković, Jasmina, 1961-.
Subjects/Keywords: abundance; temporal variability; spatial variability;
southern Adriatic
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pestorić, B. . 1. (2014). Dinamika zajednica zooplanktona u Bokokotorskom
zalivu. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:7139/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pestorić, Branka Š 1984-. “Dinamika zajednica zooplanktona u Bokokotorskom
zalivu.” 2014. Thesis, Univerzitet u Beogradu. Accessed February 27, 2020.
https://fedorabg.bg.ac.rs/fedora/get/o:7139/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pestorić, Branka Š 1984-. “Dinamika zajednica zooplanktona u Bokokotorskom
zalivu.” 2014. Web. 27 Feb 2020.
Vancouver:
Pestorić B1. Dinamika zajednica zooplanktona u Bokokotorskom
zalivu. [Internet] [Thesis]. Univerzitet u Beogradu; 2014. [cited 2020 Feb 27].
Available from: https://fedorabg.bg.ac.rs/fedora/get/o:7139/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pestorić B1. Dinamika zajednica zooplanktona u Bokokotorskom
zalivu. [Thesis]. Univerzitet u Beogradu; 2014. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:7139/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Hong Kong
5.
蔡柏勤; Choi, Pak-kan.
Quantitative assessment of the intra-regional
precipitation variability in Northwestern China and its driving
forces, AD 580-1979.
Degree: M. Phil., 2016, University of Hong Kong
URL: Choi,
P.
[蔡柏勤].
(2016).
Quantitative
assessment
of
the
intra-regional
precipitation
variability
in
Northwestern
China
and
its
driving
forces,
AD
580-1979.
(Thesis).
University
of
Hong
Kong,
Pokfulam,
Hong
Kong
SAR.
Retrieved
from
http://dx.doi.org/10.5353/th_b5719467
;
http://hdl.handle.net/10722/223615
► Northwestern China (NW China) is characterized by complex regional precipitation pattern, but there are few discussions about the intra-regional precipitation variability (IRPV) in NW China.…
(more)
▼ Northwestern China (NW China) is characterized by
complex regional precipitation pattern, but there are few
discussions about the intra-regional precipitation variability
(IRPV) in NW China. The purposes of the present study are to
quantify the long-term IRPV and to investigate the driving
mechanism of IRPV in NW China for the period AD 580-1979. This
study focuses on Gansu, Ningxia, Sha’anxi and the eastern part of
Qinghai. To improve the climatic significance of the result, the
study area is further divided into two sub-regions, namely the arid
region (Region A) and the semi-arid region (Region B). Since the
transition zone of the Asian Summer Monsoon (ASM) and the
Westerlies locates in the study region, the regional precipitation
is highly sensitive to the fluctuations of various climatic driving
forces and hence, characterized by strong regional precipitation
disparity.
In the present study, historical documentary records
of drought/ flood events are employed to reconstruct the decadal
precipitation index (PI) for Region A (PI_A) and Region B (PI_B).
The IRPV index is derived from the differences of precipitation
index between the two sub-regions. The verification result shows
that the IRPV index is able to reflect the long-term spatial
hydro-climatic disparity between regions in NW China for the last
millennium. Besides, wavelet analysis is employed to reveal the
cyclic components of PIA, PIB and IRPV in NW China. The results
show that a distinctive ~120-200 year periodicity band exists
during the Little Ice Age (LIA, c. AD 1400-1900), which coincides
with the period when the IRPV extremes are frequently observed.
Various climatic factors are examined for the potential driving
relationships with IRPV, including ASM, Arctic Oscillation (AO),
Atlantic Multi-decadal Oscillation (AMO), El Niño Southern
Oscillation (ENSO), North Atlantic Oscillation (NAO), Pacific
Decadal Oscillation (PDO) and China temperature. Results of wavelet
coherence analysis show that the influences of AO, AMO, NAO and PDO
on IRPV vary in Medieval Warm Period (MWP, c. AD 1000-1300) and the
LIA. ENSO and China temperature are found to be important long-term
driving factors in modulating the IRPV in NW China at the
multi-decadal to multi-centennial scales, possibly through the
geographic shifting of between ASM and the Westerlies.
In terms
of academic significance, the present study provides quantitative
assessment that reveals the long-term variations of IRPV in NW
China and statistical evidence of the driving mechanisms modulating
the IRPV in the last millennium. The present study applies a new
method to study the long-term dynamics of IRPV in NW China (i.e.
calculating the relative differences in precipitation index), which
facilitates the investigation of precipitation pattern and the
associated spatial disparity at the regional scale. In terms of
practical values, the present study enriches our knowledge about
the hydro-climatic changes and the associated driving mechanisms of
NW China from pre-industrialization era to modern…
Subjects/Keywords: Precipitation variability - China
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
蔡柏勤; Choi, P. (2016). Quantitative assessment of the intra-regional
precipitation variability in Northwestern China and its driving
forces, AD 580-1979. (Masters Thesis). University of Hong Kong. Retrieved from Choi, P. [蔡柏勤]. (2016). Quantitative assessment of the intra-regional precipitation variability in Northwestern China and its driving forces, AD 580-1979. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5719467 ; http://hdl.handle.net/10722/223615
Chicago Manual of Style (16th Edition):
蔡柏勤; Choi, Pak-kan. “Quantitative assessment of the intra-regional
precipitation variability in Northwestern China and its driving
forces, AD 580-1979.” 2016. Masters Thesis, University of Hong Kong. Accessed February 27, 2020.
Choi, P. [蔡柏勤]. (2016). Quantitative assessment of the intra-regional precipitation variability in Northwestern China and its driving forces, AD 580-1979. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5719467 ; http://hdl.handle.net/10722/223615.
MLA Handbook (7th Edition):
蔡柏勤; Choi, Pak-kan. “Quantitative assessment of the intra-regional
precipitation variability in Northwestern China and its driving
forces, AD 580-1979.” 2016. Web. 27 Feb 2020.
Vancouver:
蔡柏勤; Choi P. Quantitative assessment of the intra-regional
precipitation variability in Northwestern China and its driving
forces, AD 580-1979. [Internet] [Masters thesis]. University of Hong Kong; 2016. [cited 2020 Feb 27].
Available from: Choi, P. [蔡柏勤]. (2016). Quantitative assessment of the intra-regional precipitation variability in Northwestern China and its driving forces, AD 580-1979. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5719467 ; http://hdl.handle.net/10722/223615.
Council of Science Editors:
蔡柏勤; Choi P. Quantitative assessment of the intra-regional
precipitation variability in Northwestern China and its driving
forces, AD 580-1979. [Masters Thesis]. University of Hong Kong; 2016. Available from: Choi, P. [蔡柏勤]. (2016). Quantitative assessment of the intra-regional precipitation variability in Northwestern China and its driving forces, AD 580-1979. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5719467 ; http://hdl.handle.net/10722/223615
University of Hong Kong
6.
袁蓁; Yuan, Zhen.
A multiproxy reconstruction of precipitation variability
of China for the last two millennia.
Degree: M. Phil., 2013, University of Hong Kong
URL: Yuan,
Z.
[袁蓁].
(2013).
A
multiproxy
reconstruction
of
precipitation
variability
of
China
for
the
last
two
millennia.
(Thesis).
University
of
Hong
Kong,
Pokfulam,
Hong
Kong
SAR.
Retrieved
from
http://dx.doi.org/10.5353/th_b4985889
;
http://dx.doi.org/10.5353/th_b4985889
;
http://hdl.handle.net/10722/181888
► Palaeoclimate reconstruction is of paramount importance because the more we know about the patterns of past variability the better we understand the present climate. Precipitation…
(more)
▼ Palaeoclimate reconstruction is of paramount
importance because the more we know about the patterns of past
variability the better we understand the present climate.
Precipitation is a key climate variable shaping the culture and
economy of China. However, few studies are concerned with past
changes in precipitation. The existing few are either reconstructed
by one reconstruction approach or based on a single proxy, limiting
reconstructions to a small region and a short period of time. The
study presents the first high-resolution multi-proxy
palaeoprecipitation reconstruction of China as a whole. Proxies
used in the study are of annual-to-decadal resolution, mainly
including historical written evidence, tree-ring chronologies and
stable isotopic records. In accordance with the principle of
“uniformity in the nature”, about 80 proxy series extend the
precipitation records as far back in time as 2,000 years ago when
there was a significant increase in natural proxy and documentary
records of climate all over China.
The top three popular
reconstruction approaches are borrowed from multi-proxy temperature
reconstructions to reconstruct the palaeoprecipitation. A
pioneering attempt is taken to evaluate and compare these
approaches in reconstructing precipitation over a long term in a
large scale. The three common practices are respectively simple
average, composite-plus-scale method, and covariance-based climate
field reconstruction. All three reconstruction methods are modified
catering to the unique characteristics of precipitation, especially
in terms of its large spatial variance. Local reconstructions are
carried out first before a national index in reconstructed. Though
based on the same documentary and natural proxies, three
reconstruction approaches adopt different rationales to decipher
the precipitation
variability, represented by different statistical
models. Each model is assessed by conventional statistics and
cross-compared. These models are found complementary to each other
while the common shared among three models are considered the
closest to the true precipitation condition.
Though
geographically biased to Eastern China, historical documents still
capture the most inter-annual to multi-centennial variations in
palaeoprecipitation, indicating the possible control of Asian
Monsoon climate on China’s overall precipitation. Tree-ring widths
preform worst due in part to the attribute of strong locality. Each
reconstruction approach turns out to have its own strength and
weakness. Three major falls at multi-centennial timescale are
detected in most reconstructed precipitation series, which are at
AD600-800, AD1000-1300 and AD1500-1700. Spectral analyses
demonstrate a rhythmic pattern of around 400-500 years for all
reconstructions. When the proxies are not extrapolated, an
additional cycle of 700-800 years is significant in precipitation
variability over the past 2,000 years. A cross-comparison with
European reconstructions show a high agreement in precipitation
variability for the past two millennia,…
Advisors/Committee Members: Zhang, D.
Subjects/Keywords: Precipitation variability - China.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
袁蓁; Yuan, Z. (2013). A multiproxy reconstruction of precipitation variability
of China for the last two millennia. (Masters Thesis). University of Hong Kong. Retrieved from Yuan, Z. [袁蓁]. (2013). A multiproxy reconstruction of precipitation variability of China for the last two millennia. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4985889 ; http://dx.doi.org/10.5353/th_b4985889 ; http://hdl.handle.net/10722/181888
Chicago Manual of Style (16th Edition):
袁蓁; Yuan, Zhen. “A multiproxy reconstruction of precipitation variability
of China for the last two millennia.” 2013. Masters Thesis, University of Hong Kong. Accessed February 27, 2020.
Yuan, Z. [袁蓁]. (2013). A multiproxy reconstruction of precipitation variability of China for the last two millennia. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4985889 ; http://dx.doi.org/10.5353/th_b4985889 ; http://hdl.handle.net/10722/181888.
MLA Handbook (7th Edition):
袁蓁; Yuan, Zhen. “A multiproxy reconstruction of precipitation variability
of China for the last two millennia.” 2013. Web. 27 Feb 2020.
Vancouver:
袁蓁; Yuan Z. A multiproxy reconstruction of precipitation variability
of China for the last two millennia. [Internet] [Masters thesis]. University of Hong Kong; 2013. [cited 2020 Feb 27].
Available from: Yuan, Z. [袁蓁]. (2013). A multiproxy reconstruction of precipitation variability of China for the last two millennia. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4985889 ; http://dx.doi.org/10.5353/th_b4985889 ; http://hdl.handle.net/10722/181888.
Council of Science Editors:
袁蓁; Yuan Z. A multiproxy reconstruction of precipitation variability
of China for the last two millennia. [Masters Thesis]. University of Hong Kong; 2013. Available from: Yuan, Z. [袁蓁]. (2013). A multiproxy reconstruction of precipitation variability of China for the last two millennia. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4985889 ; http://dx.doi.org/10.5353/th_b4985889 ; http://hdl.handle.net/10722/181888
7.
Hichaambwa, Munguzwe.
Genetic variability and stability analysis in sunflower(Helianthus annuus,L.).
Degree: 2012, University of Zimbabwe
URL: http://dspace.unza.zm/handle/123456789/1862
► Information on genetic variability and stability of yield and yield components of sunflower in Zambia is lacking. The study was undertaken to determine the magnitude…
(more)
▼ Information on genetic variability and stability of yield and yield components of sunflower in Zambia is lacking. The study was undertaken to determine the magnitude of yield; determine the relationships between yield and it's components; and estimate the heritability and stability of important traits in sunflower. Twenty five genotypes representing a random sample of the breeding populations in an on going sunflower improvement programme were grown in a 5 X 5 triple lattice design in 5 locations in the 1993/94 growing season. Data on kernel yield, kernel yield/head, oil content, oil yield, head diameter, stem diameter, plant population, plant height, average number of leaves/plant, number of days to 50% flowering, 1000 kernel weight and kernel % were collected and/or derived. The magnitude of yield was determined at harvesting. The relationship between yield and it's components was determined by path coefficient analysis. Presence of genetic variability was indicated by significant genetic variance. Heritability was estimated from variance components. Stability analysis was also done. The magnitude of kernel yield was found to be comparable with world averages though the average kernel yield of 1163 Kg/ha was below the country range of 1500 to 2000 Kg/ha) due to poor rains. High correlations between kernel yield and plant height (r = 0.420**), stem diameter (r = 0.589**) and kernel yield/head (r = 0.658**) were observed but their direct effects on kernel yield were very small (-0.216, -0.154 and -0.189 respectively). However, their indirect effects were more positive mostly through head diameter (0.127, 0.174 and 0.141 respectively). Head diameter showed large direct effects on both kernel yield (0.311) and oil content (0.581). The direct effect of 1000 kernel weight on oil yield (0.173) was large relative to overall correlation (r = 0.195**). The genetic variances for kernel yield, oil content, oil yield, head diameter, plant height, kernel yield/head and 1000 kernel weight were significant (P < 0.05). The broad sense heritability estimates for kernel yield ranged from 5.42% in Golden Valley to 33.01% in Monze; overall the estimate was 7.12%. For oil content the estimates ranged from 14.95%) in Mt Makulu to 52.35% in Monze with an overall estimate of 11.43%i. Similarly those of oil yield, plant height, stem diameter and 1000 kernel weight ranged from 8.36% in Golden Valley, 9.36% in Monze, 5.77% in Mt Makulu and 5.54% in Mt Makulu respectively to 26.78%) in Monze, 61.96%) in MRS, 27.27%o in Mt Makulu and 37.66%) in Monze respectively with the overall estimate being 20.37%, 10.20%), 0.23%), and 2.51% respectively. For head diameter the estimate was 17.33%) in Mt Makulu and 2.97% overall. Genotype X location interaction effects were significant for kernel yield, oil yield, 1000 kernel weight, stem diameter and plant height. Sunflower with respect to kernel and oil yield showed average ability to be consistent across locations. Overall the magnitude of yield was found to fall within an acceptable range with genetic…
Subjects/Keywords: Sunflowers; Genetic variability
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APA (6th Edition):
Hichaambwa, M. (2012). Genetic variability and stability analysis in sunflower(Helianthus annuus,L.). (Thesis). University of Zimbabwe. Retrieved from http://dspace.unza.zm/handle/123456789/1862
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hichaambwa, Munguzwe. “Genetic variability and stability analysis in sunflower(Helianthus annuus,L.).” 2012. Thesis, University of Zimbabwe. Accessed February 27, 2020.
http://dspace.unza.zm/handle/123456789/1862.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hichaambwa, Munguzwe. “Genetic variability and stability analysis in sunflower(Helianthus annuus,L.).” 2012. Web. 27 Feb 2020.
Vancouver:
Hichaambwa M. Genetic variability and stability analysis in sunflower(Helianthus annuus,L.). [Internet] [Thesis]. University of Zimbabwe; 2012. [cited 2020 Feb 27].
Available from: http://dspace.unza.zm/handle/123456789/1862.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hichaambwa M. Genetic variability and stability analysis in sunflower(Helianthus annuus,L.). [Thesis]. University of Zimbabwe; 2012. Available from: http://dspace.unza.zm/handle/123456789/1862
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Waterloo
8.
Hyatt, Sarah.
Influence of the Atlantic Multidecadal Variability on the climate response to external forcing.
Degree: 2018, University of Waterloo
URL: http://hdl.handle.net/10012/13675
► Internal climate variability has been found to influence the climate response to an external forcing such as CO2. This thesis investigates the influence of the…
(more)
▼ Internal climate variability has been found to influence the climate response to an external forcing such as CO2. This thesis investigates the influence of the Atlantic Multidecadal Variability (AMV), a mode of internal climate variability in the North Atlantic Ocean, on the response to external forcing. The AMV is a 60 - 80 year fluctuation in the sea surface temperatures of the North Atlantic that has widespread effects on climate. Using simulations run on an ocean-atmosphere general circulation model (GCM), it is found that the AMV phase significantly impacts the regional response to CO2: in the extratropical Northern Hemisphere, Eurasia warms more, and North America and the North Pacific warm less, in the warm phase of the AMV. The mechanisms of the AMV-related response are explored using a constructed circulation analog method. Changes in teleconnections between the tropical and extratropical Pacific contribute to the dynamical component of the difference in response to forcing between AMV phases, while differences in sea ice may contribute to the thermodynamic component. Interestingly, some aspects of the AMV-related response are robust with different external forcings. Finally, using simulations run on an atmospheric GCM, the role of sea ice in forcing atmospheric AMV-related anomalies is investigated. It is found that sea ice in the Barents and Greenland Seas plays a large role in forcing local temperature anomalies.
Subjects/Keywords: Atlantic Multidecadal Variability
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APA ·
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APA (6th Edition):
Hyatt, S. (2018). Influence of the Atlantic Multidecadal Variability on the climate response to external forcing. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/13675
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hyatt, Sarah. “Influence of the Atlantic Multidecadal Variability on the climate response to external forcing.” 2018. Thesis, University of Waterloo. Accessed February 27, 2020.
http://hdl.handle.net/10012/13675.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hyatt, Sarah. “Influence of the Atlantic Multidecadal Variability on the climate response to external forcing.” 2018. Web. 27 Feb 2020.
Vancouver:
Hyatt S. Influence of the Atlantic Multidecadal Variability on the climate response to external forcing. [Internet] [Thesis]. University of Waterloo; 2018. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10012/13675.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hyatt S. Influence of the Atlantic Multidecadal Variability on the climate response to external forcing. [Thesis]. University of Waterloo; 2018. Available from: http://hdl.handle.net/10012/13675
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
9.
Khan, Rizwan Ahmed.
An examination of two methods of measuring inconsistency.
Degree: 2012, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/37
► Previous research has provided evidence for the notion that there are varying levels of inconsistency between individuals when responding to questionnaires with multiple response items.…
(more)
▼ Previous research has provided evidence for the notion that there are varying levels of inconsistency between individuals when responding to questionnaires with multiple response items. Specifically, there are individual differences in how consistently persons respond to items from the same dimension in a questionnaire (Reddock, Biderman & Nguyen, 2011). Currently, there is not a consensus on how inconsistency should be measured. In the present study inconsistency of responses to the IPIP Big Five questionnaire was measured. Two response formats permitting measurement of inconsistency were compared - a frequency-based format (FB) vs. a traditional Likert scale format. Furthermore, in an effort to study inconsistency in a broader context, the relationships of social desirability and ADHD to inconsistency were examined. The results provided no evidence for convergent validity between the two measures, discriminant validity for each measure, no evidence of a relationship between BIDR and inconsistency, but a positive relationship between FB based inconsistency and scores on the ADHD measure. Implications and limitations of the study are discussed.
Advisors/Committee Members: Biderman, Michael D., O'Leary, Brian J., Weathington, Bart L., College of Arts and Sciences.
Subjects/Keywords: Psychometrics; Variability (Psychometrics)
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Khan, R. A. (2012). An examination of two methods of measuring inconsistency. (Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/37
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Khan, Rizwan Ahmed. “An examination of two methods of measuring inconsistency.” 2012. Thesis, University of Tennessee – Chattanooga. Accessed February 27, 2020.
https://scholar.utc.edu/theses/37.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Khan, Rizwan Ahmed. “An examination of two methods of measuring inconsistency.” 2012. Web. 27 Feb 2020.
Vancouver:
Khan RA. An examination of two methods of measuring inconsistency. [Internet] [Thesis]. University of Tennessee – Chattanooga; 2012. [cited 2020 Feb 27].
Available from: https://scholar.utc.edu/theses/37.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Khan RA. An examination of two methods of measuring inconsistency. [Thesis]. University of Tennessee – Chattanooga; 2012. Available from: https://scholar.utc.edu/theses/37
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Anna University
10.
Rao T V K H.
Study of hidden dynamics of heart Rate variability and
computation of Nonlinear parameters of heart rate
Variability;.
Degree: Study of hidden dynamics of heart Rate variability and
computation of Nonlinear parameters of heart rate
Variability, 2015, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/40730
► Normal heart rates range between 60 to 100 beats per minute at rest newlineHeart rate variability HRV indicates the beat to beat alterations in heart…
(more)
▼ Normal heart rates range between 60 to 100 beats
per minute at rest newlineHeart rate variability HRV indicates the
beat to beat alterations in heart rate newlineIt was confirmed that
HRV is a strong and independent predictor of mortality newlineafter
an acute myocardial infarction The heart s normal beats are from
newlineimpulses from pacemaker cells in the sinus node
newlineLinear measures of HRV includes various time and frequency
domain newlineIndices Even though there are many well established
linear HRV analysis newlineTools the methods from nonlinear theory
may provide more information and newlinediagonostic potential It
has been speculated that methods from nonlinear newlinedynamics may
provide a powerful tool for better understanding the
newlinemechanisms of cardiovascular control newlineA M arkov model
is a random process in which the transition newlineprobability to
the next state depends solely on the previous state Performing
newlinethe analysis by using higher order cumulants a meaningful
measure of the newlinestatistical dependency between N past
observations of the time series xt and newlinea point r steps ahead
in the future newline
reference p191-204.
Advisors/Committee Members: Ravindran G.
Subjects/Keywords: Arkov model; Heart rate variability
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APA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
H, R. T. V. K. (2015). Study of hidden dynamics of heart Rate variability and
computation of Nonlinear parameters of heart rate
Variability;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/40730
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
H, Rao T V K. “Study of hidden dynamics of heart Rate variability and
computation of Nonlinear parameters of heart rate
Variability;.” 2015. Thesis, Anna University. Accessed February 27, 2020.
http://shodhganga.inflibnet.ac.in/handle/10603/40730.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
H, Rao T V K. “Study of hidden dynamics of heart Rate variability and
computation of Nonlinear parameters of heart rate
Variability;.” 2015. Web. 27 Feb 2020.
Vancouver:
H RTVK. Study of hidden dynamics of heart Rate variability and
computation of Nonlinear parameters of heart rate
Variability;. [Internet] [Thesis]. Anna University; 2015. [cited 2020 Feb 27].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/40730.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
H RTVK. Study of hidden dynamics of heart Rate variability and
computation of Nonlinear parameters of heart rate
Variability;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/40730
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
11.
Myoung, Boksoon.
Interannual variability of summer precipitation in Texas and its implication to summer drought.
Degree: 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-1422
► Since Texas normally receives most of its precipitation in the warm season, precipitation deficits in summertime may bring serious agricultural and hydrological disasters. While the…
(more)
▼ Since Texas normally receives most of its precipitation in the warm season, precipitation deficits in summertime may bring serious agricultural and hydrological disasters. While the underlying physical processes of summer precipitation deficit and drought are unclear, they can be understood in terms of convective instability. This research is designed to investigate how convective instability influences monthly mean precipitation in Texas in the summertime and to examine the modulation of convective instability and precipitation by upper-level circulations, soil moisture, vertical motion, and low-tropospheric warm air transport using NCEP/NCAR reanalysis data. Statistical approaches including correlation analysis, multiple linear regression analysis and back trajectory analysis were used to reveal the underlying dynamics of their linkage and causality. The results show that warming at 700 mb and surface dryness result in excessive convective inhibition (CIN), leading to precipitation deficits on a monthly time-scale. Temperature at 700 mb (Tlt) and surface dewpoint have little correlation suggesting different processes contribute to warming at 700 mb and surface dryness, respectively. Correlation analysis among the surface variables emphasizes the role of soil moisture on the dewpoint and thermodynamics at the surface. Back trajectory analysis indicates that a significant contributor to warming at 700 mb is the inversion caused by warm air transport from the Rocky Mountains and the Mexican Plateau where the surface potential temperature is greater than 307.5K rather than by subsidence. It was found that downward motion and warm air transport are enhanced in Texas when upper-level anticyclonic circulation develops in the southern US. Upper-level anticyclonic circulations in the southern US strongly affect Texas summertime precipitation by modulating the principal processes as follows. They increase CIN not only by enhancing warm air transport from the high terrain but also by suppressing occurrence of disturbances. The resulting reduced precipitation and dry soil significantly modulate surface conditions, which elevates CIN and decreases precipitation. The aforementioned chain-reaction of upper-level anticyclone influences can be understood in the context of CIN.
Advisors/Committee Members: Nielsen-Gammon, John (advisor), Carey, Larry (committee member), Chang, Ping (committee member), North, Gerald (committee member), Saravanan, Ramalingam (committee member), Schumacher, Courtney (committee member).
Subjects/Keywords: Texas; drought; precipitation variability
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Manager
APA (6th Edition):
Myoung, B. (2009). Interannual variability of summer precipitation in Texas and its implication to summer drought. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1422
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Myoung, Boksoon. “Interannual variability of summer precipitation in Texas and its implication to summer drought.” 2009. Thesis, Texas A&M University. Accessed February 27, 2020.
http://hdl.handle.net/1969.1/ETD-TAMU-1422.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Myoung, Boksoon. “Interannual variability of summer precipitation in Texas and its implication to summer drought.” 2009. Web. 27 Feb 2020.
Vancouver:
Myoung B. Interannual variability of summer precipitation in Texas and its implication to summer drought. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1422.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Myoung B. Interannual variability of summer precipitation in Texas and its implication to summer drought. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1422
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Edinburgh
12.
Kelly, Catriona.
Cross-situational personality variability and its relationship to self-monitoring, Machiavellianism, impression management and authenticity.
Degree: 2013, University of Edinburgh
URL: http://hdl.handle.net/1842/8620
► The current study investigated cross-situational personality variability and its relationship to the personality measures of self-monitoring, Machiavellianism, impression management and authenticity. The 228 participants completed…
(more)
▼ The current study investigated cross-situational personality
variability and its relationship to the personality measures of self-monitoring, Machiavellianism, impression management and authenticity. The 228 participants completed four questionnaires, one for each of the above personality measures, as well as a personality inventory designed to assess the expression of the FFM personality traits in three social contexts; with parents, with friends and with work colleagues. Mean-corrected personality indices were calculated and used to remove any correlational relationship between the trait
variability and means. Systematic cross-situational personality
variability with context-specific patterns was observed, in addition to cross-context consistency of the FFM traits. Contrary to predictions, no significant relationship was observed between mean-corrected personality indices and measures of self-monitoring, Machiavellianism, impression management and authenticity. The results did not support a positive relationship between mean-corrected personality
variability and self-monitoring, Machiavellianism or impression-management. Additionally, the findings did not indicate a link between mean-corrected personality
variability and authenticity.
Advisors/Committee Members: Austin, Elizabeth.
Subjects/Keywords: cross-situational personality variability
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APA (6th Edition):
Kelly, C. (2013). Cross-situational personality variability and its relationship to self-monitoring, Machiavellianism, impression management and authenticity. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/8620
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kelly, Catriona. “Cross-situational personality variability and its relationship to self-monitoring, Machiavellianism, impression management and authenticity.” 2013. Thesis, University of Edinburgh. Accessed February 27, 2020.
http://hdl.handle.net/1842/8620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kelly, Catriona. “Cross-situational personality variability and its relationship to self-monitoring, Machiavellianism, impression management and authenticity.” 2013. Web. 27 Feb 2020.
Vancouver:
Kelly C. Cross-situational personality variability and its relationship to self-monitoring, Machiavellianism, impression management and authenticity. [Internet] [Thesis]. University of Edinburgh; 2013. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/1842/8620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kelly C. Cross-situational personality variability and its relationship to self-monitoring, Machiavellianism, impression management and authenticity. [Thesis]. University of Edinburgh; 2013. Available from: http://hdl.handle.net/1842/8620
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
13.
Socie, Michael.
Gait variability in persons with multiple sclerosis.
Degree: MS, 0133, 2012, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/31135
► This thesis contains three investigations examining gait variability in people with multiple sclerosis (MS), which is a neurological disease that can result in significant walking…
(more)
▼ This thesis contains three investigations examining gait
variability in people with multiple sclerosis (MS), which is a neurological disease that can result in significant walking impairment. Gait
variability, i.e. fluctuations in the mechanics and kinematics of steps during walking, has been associated with motor control function, stability and falls in other populations but has not been thoroughly documented in people with MS. In this thesis, gait
variability is documented in different samples of people with MS using a variety of metrics. The first investigation examines differences in
variability of spatiotemporal gait parameters between people with MS and healthy controls and associations between
variability of spatiotemporal gait parameters and disability in MS. The second investigation determines
variability of lower-limb joint and segment angles at various walking speeds in MS. The third investigation documents a novel metric for quantification of footfall placement
variability and subsequent associations between footfall
variability and fall history in MS. Results herein include greater
variability of step length, step time, and footfall placement
variability in people with MS compared to controls, decrease in ankle angle
variability with increasing walking velocity in MS, and that increased footfall placement
variability, indexed by a novel metric, separates recurrent and non fallers with MS. Additional research into gait
variability in MS is warranted to further evaluate differences between MS and controls as well as to investigate underlying factors that may drive gait
variability in MS.
Advisors/Committee Members: Sosnoff, Jacob J. (advisor).
Subjects/Keywords: Gait; Multiple Sclerosis; Variability
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APA (6th Edition):
Socie, M. (2012). Gait variability in persons with multiple sclerosis. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/31135
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Socie, Michael. “Gait variability in persons with multiple sclerosis.” 2012. Thesis, University of Illinois – Urbana-Champaign. Accessed February 27, 2020.
http://hdl.handle.net/2142/31135.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Socie, Michael. “Gait variability in persons with multiple sclerosis.” 2012. Web. 27 Feb 2020.
Vancouver:
Socie M. Gait variability in persons with multiple sclerosis. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2012. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/2142/31135.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Socie M. Gait variability in persons with multiple sclerosis. [Thesis]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/31135
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
14.
Luchkina, Tatiana Vyacheslavovna.
Prosodic and structural variability in free word order language discourse.
Degree: PhD, Linguistics, 2016, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/93033
► Independently of the modality of presentation (written or auditory), human processing of discourse obligatorily involves monitoring relative information prominence which reflects how important information is…
(more)
▼ Independently of the modality of presentation (written or auditory), human processing of discourse obligatorily involves monitoring relative information prominence which reflects how important information is in discourse, and thereby determines the perceptual impact it makes on the speaker and the listener. In spoken language use, relative information prominence is expressed it by means of morphology, structural organization of information across an utterance, and by prosodic means (Morgan, Meier, & Newport 1987, Stolterfoht, Friederici, Alter, & Steube 2007, Watson 2010). To illustrate, Hindi speakers may use special morphological prominence markers, bound morphemes 'hii' and 'bhii', which attach to words that the listener is likely to identify as prominent (Luchkina, Puri, Jyothi, Cole 2015). In Hungarian and Hindi, speakers place the prominent word in the pre-verbal position in a sentence or phrase, which presents a designated location for prominent (focused) information in these languages (Genzel and Kügler 2010, Féry 2013). In English, it is the utterance-final or, else, the most prosodically prominent word in a sentence or phrase that is likely to be identified as prominent (Ladd, 2008, Watson 2010).
This thesis examines the use of acoustic-prosodic cues and constituent ordering in the expression of relative information prominence and the way it affects perception (as perceived prominence) in Russian, a free word order language, by empirically testing the "dual route" model of expressing prominence in discourse. This model presupposes (1) structural "packaging" of information, evident from the linear ordering of words in an utterance such that words communicating relatively more accessible and therefore less salient information precede words communicating less accessible and therefore more salient information, and (2) varying magnitude of acoustic-prosodic parameters in a controlled way such that prominent information bears greater perceptual salience in speech. Speech production and comprehension experiments described below test whether these routes, structural and acoustic-prosodic, are used independently or together in the encoding of information prominence. Russian is chosen as the test case because it allows but does not require surface reordering of sentential constituents for information structural purposes and exhibits distinctions in prosodic prominence among the constituents of a sentence (Sekerina 2003, Slioussar 2011a, b, Svetozarova 1998).
To examine how prosodic and structural cues are utilized during the off-line and the online processing of discourse in Russian, the following research objectives are pursued. In Study 1 (see Chapter 2 of the present version), the distribution of structural and acoustic-prosodic
variability in read discourse is examined in association with two well-known prominence scales: distinctions in the information status of a discourse referent and animacy of a discourse referent (in conjunction with grammatical function of the corresponding lexical word). In Study 2…
Advisors/Committee Members: Cole, Jennifer S. (advisor), Cole, Jennifer S. (Committee Chair), Ionin, Tania (committee member), Shosted, Ryan (committee member), Hualde, José Ignacio (committee member).
Subjects/Keywords: Prosodic variability; word order
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APA (6th Edition):
Luchkina, T. V. (2016). Prosodic and structural variability in free word order language discourse. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/93033
Chicago Manual of Style (16th Edition):
Luchkina, Tatiana Vyacheslavovna. “Prosodic and structural variability in free word order language discourse.” 2016. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed February 27, 2020.
http://hdl.handle.net/2142/93033.
MLA Handbook (7th Edition):
Luchkina, Tatiana Vyacheslavovna. “Prosodic and structural variability in free word order language discourse.” 2016. Web. 27 Feb 2020.
Vancouver:
Luchkina TV. Prosodic and structural variability in free word order language discourse. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2016. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/2142/93033.
Council of Science Editors:
Luchkina TV. Prosodic and structural variability in free word order language discourse. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/93033
Victoria University of Wellington
15.
Markle, Bradley Ross.
Decadal Climate Oscillations, Synoptic Variability, and Ice Core Climate Proxy Records in the Ross Sea Region, Antarctica.
Degree: 2012, Victoria University of Wellington
URL: http://hdl.handle.net/10063/2438
► This thesis investigates synoptic variability in the Ross Sea region, Antarctica and develops geochemical proxies of this variability from an ice core record in Southern…
(more)
▼ This thesis investigates synoptic
variability in the Ross Sea region, Antarctica and develops geochemical proxies of this
variability from an ice core record in Southern Victoria Land. Particular focus is given to the influence of decadal climate oscillations on synoptic conditions and potential records of these oscillations in ice core proxy records as long-‐term records of these oscillations are important for understanding future climate change. I present an investigation of the joint influence of the El Niño Southern Oscillation (ENSO) and the Southern Annular Mode (SAM) on
variability in the Amundsen Sea Low (ASL), a dominant climatological feature that strongly influences the weather in the Ross Sea region. It is shown that the positive phase of each oscillation is associated with significant strengthening of the ASL, while negative phases are associated with a weakening. Through regression analysis I show that a simple linear combination of indices representing these oscillations can explain more than 40% of the geopotential height variance in the AS region at a seasonal scale and over 70% of the variance at an annual scale. These results are consistent with the known mechanisms of ENSO and SAM interaction in the region and show that while SAM is dominant hemispherically, ENSO is only influential in the Pacific Sector. Finally it is demonstrated that a simple model of linear reinforcement and interference between the oscillations describes their influence on the
variability in the ASL better than models incorporating more complex interactions. Atmospheric back-‐trajectory modeling and cluster analysis are used to investigate synoptic
variability at the Gawn Ice Piedmont (GIP) ice core site in the Ross Sea Region, Antarctica. I identify two dominant air-‐mass trajectory clusters: oceanic – cyclonic and continental trajectories. My analysis shows that oceanic – cyclonic trajectories peak during April (southern hemisphere winter), while continental trajectories reach their maximum during December (summer). A causal association is demonstrated between ENSO and the frequency of oceanic – cyclonic trajectories originating from the Ross Sea region. In contrast, it is shown that the Southern Annular Mode has little influence on the frequency of cyclonic clusters. I then develop proxy records for the synoptic
variability using a shallow firn core from the GIP site containing 8 years of geochemical record. Continental trajectories correlate with concentrations of nitrate (NO3), which is sourced from stratospheric air-‐masses descending over the Antarctic interior. Oceanic – cyclonic trajectory clusters strongly correlate with deuterium excess at seasonal and inter-‐annual scales, a proxy sensitive to changes in relative humidity and sea surface temperature (SST) in the in the Ross and Amundsen Seas. Decadal
variability in the frequency of oceanic – cyclonic trajectories is discussed with respect to ENSO, SAM, and changes in SST and sea ice extent.
Advisors/Committee Members: Bertler, Nancy.
Subjects/Keywords: Antarctica; Ice cores; Synoptic variability
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APA (6th Edition):
Markle, B. R. (2012). Decadal Climate Oscillations, Synoptic Variability, and Ice Core Climate Proxy Records in the Ross Sea Region, Antarctica. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/2438
Chicago Manual of Style (16th Edition):
Markle, Bradley Ross. “Decadal Climate Oscillations, Synoptic Variability, and Ice Core Climate Proxy Records in the Ross Sea Region, Antarctica.” 2012. Masters Thesis, Victoria University of Wellington. Accessed February 27, 2020.
http://hdl.handle.net/10063/2438.
MLA Handbook (7th Edition):
Markle, Bradley Ross. “Decadal Climate Oscillations, Synoptic Variability, and Ice Core Climate Proxy Records in the Ross Sea Region, Antarctica.” 2012. Web. 27 Feb 2020.
Vancouver:
Markle BR. Decadal Climate Oscillations, Synoptic Variability, and Ice Core Climate Proxy Records in the Ross Sea Region, Antarctica. [Internet] [Masters thesis]. Victoria University of Wellington; 2012. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/10063/2438.
Council of Science Editors:
Markle BR. Decadal Climate Oscillations, Synoptic Variability, and Ice Core Climate Proxy Records in the Ross Sea Region, Antarctica. [Masters Thesis]. Victoria University of Wellington; 2012. Available from: http://hdl.handle.net/10063/2438
16.
Esdale, Julie A.
Lithic Production Sequences and Toolkit Variability:
Examples from the Middle Holocene, Northwest Alaska.
Degree: PhD, Anthropology, 2008, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:56/
► Many lithic analyses in recent decades have focused on the influence of lithic production techniques and artifact stages in the discard form of stone tools.…
(more)
▼ Many lithic analyses in recent decades have focused on
the influence of lithic production techniques and artifact stages
in the discard form of stone tools. Assemblage composition has also
been seen to reflect production and reduction activities at
landscape scales. This approach has not yet been applied to the
archaeological record of the north, however, despite its usefulness
in analyzing small-scale sites dominated by lithic materials.
Middle Holocene artifact assemblages in Alaska have frequently been
characterized by the presence or absence of notched projectile
points and microblade technology and assigned to one of two major
categories with differences interpreted in terms of culture
history. Sites with notched projectile points but no microblades
are thought to belong to the Northern Archaic (based on these
levels at the Onion Portage site (Anderson 1968a, b)), while sites
with notched projectile points and microblades are considered
"Tuktu-like" (after the Tuktu-Naiyuk site at Anaktuvuk Pass
(Campbell 1959)), with little consideration of the site function or
reduction activities. Here, a synthesis of over 200 middle Holocene
sites from across Alaska and Yukon is used to show that there is
more
variability in age, distribution, artifact morphology, and
assemblage composition than can be explained within existing
culture-historical frameworks. Detailed cluster analyses, spatial
analyses, and lithic analyses are also used to interpret the lithic
production sequences represented by ten relevant near-surface
archaeological sites from the central and western Brooks Range of
northern Alaska. These data suggest that the archaeological record
for the middle Holocene in northern Alaska is strongly conditioned
by production and maintenance of a variety of tool types as well as
the timing of the addition of raw materials into the
toolkit.
Advisors/Committee Members: Anderson, Douglas (director), Gould, Richard (reader), Rubertone, Patricia (reader), Yesner, David (reader).
Subjects/Keywords: assemblage variability
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APA (6th Edition):
Esdale, J. A. (2008). Lithic Production Sequences and Toolkit Variability:
Examples from the Middle Holocene, Northwest Alaska. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:56/
Chicago Manual of Style (16th Edition):
Esdale, Julie A. “Lithic Production Sequences and Toolkit Variability:
Examples from the Middle Holocene, Northwest Alaska.” 2008. Doctoral Dissertation, Brown University. Accessed February 27, 2020.
https://repository.library.brown.edu/studio/item/bdr:56/.
MLA Handbook (7th Edition):
Esdale, Julie A. “Lithic Production Sequences and Toolkit Variability:
Examples from the Middle Holocene, Northwest Alaska.” 2008. Web. 27 Feb 2020.
Vancouver:
Esdale JA. Lithic Production Sequences and Toolkit Variability:
Examples from the Middle Holocene, Northwest Alaska. [Internet] [Doctoral dissertation]. Brown University; 2008. [cited 2020 Feb 27].
Available from: https://repository.library.brown.edu/studio/item/bdr:56/.
Council of Science Editors:
Esdale JA. Lithic Production Sequences and Toolkit Variability:
Examples from the Middle Holocene, Northwest Alaska. [Doctoral Dissertation]. Brown University; 2008. Available from: https://repository.library.brown.edu/studio/item/bdr:56/
North Carolina State University
17.
Gamaldo, Alyssa Ann.
Assessing Intraindividual Variability on Neuropsychological Assessments in African American Older Adults.
Degree: PhD, Psychology, 2009, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/4760
► The current investigation examined intraindividual variability and predictors of this variability on neuropsychological measures. A total of 50 (39 women and 11 men) independently living,…
(more)
▼ The current investigation examined intraindividual
variability and predictors of this
variability on neuropsychological measures. A total of 50 (39 women and 11 men) independently living, community-dwelling African Americans ranging in age from 50 to 80 years (M = 65.40, SD = 8.53) were asked to complete measures assessing socio-demographics, physical health (i.e. blood pressure and sleep), and cognitive functioning (i.e. executive function, memory, perceptual speed, constructions, and language) over 8 occasions within a 2-3 week period. The current study observed intraindividual
variability across the neuropsychological measures. Results from multilevel modeling suggested that a within-person change in systolic blood pressure was positively associated with performance on executive function (e.g., Letter Fluency), particularly for those participants who on average had high systolic blood pressure and high stress. In contrast, a within-person change in sleep duration was associated with worse performance on constructions and executive functioning (e.g., Letter Fluency). Results also reflected a significant interaction between within-person change in sleep duration and average sleep duration for both perceptual speed (e.g., Number Comparison test) and executive function (e.g., Stroop task). Individuals with low sleep duration on average tended to perform poorly, particularly on those occasions when their sleep duration was below their personal average. In contrast, individuals with high sleep duration on average tended to perform poorly, particularly on those occasions when their sleep duration was above their personal average. Furthermore, daily fluctuations in sleep duration were associated with an increased risk for classification of mild cognitive impairment. The results suggest that
variability on neuropsychological measures may be a useful clinical assessment of older African Americans’ cognitive competency.
Advisors/Committee Members: Jason Allaire, Committee Chair (advisor), Thomas Hess, Committee Co-Chair (advisor), Shevaun Neupert, Committee Member (advisor), Keith Whitfield, Committee Member (advisor).
Subjects/Keywords: Intraindividual Variability; Neuropsychological Measures
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APA (6th Edition):
Gamaldo, A. A. (2009). Assessing Intraindividual Variability on Neuropsychological Assessments in African American Older Adults. (Doctoral Dissertation). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/4760
Chicago Manual of Style (16th Edition):
Gamaldo, Alyssa Ann. “Assessing Intraindividual Variability on Neuropsychological Assessments in African American Older Adults.” 2009. Doctoral Dissertation, North Carolina State University. Accessed February 27, 2020.
http://www.lib.ncsu.edu/resolver/1840.16/4760.
MLA Handbook (7th Edition):
Gamaldo, Alyssa Ann. “Assessing Intraindividual Variability on Neuropsychological Assessments in African American Older Adults.” 2009. Web. 27 Feb 2020.
Vancouver:
Gamaldo AA. Assessing Intraindividual Variability on Neuropsychological Assessments in African American Older Adults. [Internet] [Doctoral dissertation]. North Carolina State University; 2009. [cited 2020 Feb 27].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/4760.
Council of Science Editors:
Gamaldo AA. Assessing Intraindividual Variability on Neuropsychological Assessments in African American Older Adults. [Doctoral Dissertation]. North Carolina State University; 2009. Available from: http://www.lib.ncsu.edu/resolver/1840.16/4760
University of Nairobi
18.
Odingo, Richard S.
Climatic variability and land use: an African perspective
.
Degree: 1979, University of Nairobi
URL: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/45424
Subjects/Keywords: Climatic variability
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APA (6th Edition):
Odingo, R. S. (1979). Climatic variability and land use: an African perspective
. (Thesis). University of Nairobi. Retrieved from http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/45424
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Odingo, Richard S. “Climatic variability and land use: an African perspective
.” 1979. Thesis, University of Nairobi. Accessed February 27, 2020.
http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/45424.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Odingo, Richard S. “Climatic variability and land use: an African perspective
.” 1979. Web. 27 Feb 2020.
Vancouver:
Odingo RS. Climatic variability and land use: an African perspective
. [Internet] [Thesis]. University of Nairobi; 1979. [cited 2020 Feb 27].
Available from: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/45424.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Odingo RS. Climatic variability and land use: an African perspective
. [Thesis]. University of Nairobi; 1979. Available from: http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/45424
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Kansas
19.
Craig, Jordan John-William.
Assessment of variability and coordination of upper and lower body segments during walking in healthy adults and persons with multiple sclerosis.
Degree: MS, Bioengineering, 2015, University of Kansas
URL: http://hdl.handle.net/1808/20928
► Persons with multiple sclerosis often report problems with gait and general instability during walking, possibly due to the disease’s disruption of sensorimotor function. Understanding variability…
(more)
▼ Persons with multiple sclerosis often report problems with gait and general instability during walking, possibly due to the disease’s disruption of sensorimotor function. Understanding
variability of upper and lower body segments during walking is fundamental for assessing gait and balance, fall risk, and identifying differences in
variability between healthy control subjects and persons with MS may help uncover specific control strategies in the healthy dynamic system necessary for maintaining overall stability. The primary purpose of this study is to examine the relationship between movement of upper and lower body segments during walking in healthy adults and in persons with multiple sclerosis. Currently no studies have compared upper and lower segmental control in patients with MS with that of healthy controls during walking. Forty patients with MS and forty healthy control subjects were recruited for gait assessment while wearing wireless inertial sensors. Wireless sensors were attached to the trunk and right foot and subjects walked on a treadmill at self-selected pace. Measures of linear (range, root mean square) and nonlinear (approximate entropy, sample entropy, Lyapunov exponent, recurrence quantification analysis %recurrence)
variability were calculated from the acceleration time series recorded by the inertial sensors. Paired t-tests were used to test for differences due to location in healthy controls. Two two-way ANOVAs were used (one for the frontal plane and one for the sagittal plane) to test for main effect of group and main effect of sensor location on each of the
variability measures. Pearson’s correlations were applied to evaluate relationships between
variability of acceleration at the trunk and at the foot within the frontal and sagittal planes. No main effect of group was found for any
variability measures. Main effect of location was found for all
variability measures, with magnitudes of
variability greater at the feet compared to the trunk and structure of
variability showing more predictable
variability patterns at the foot compared to the trunk. Significant correlations were found between trunk and foot accelerations in the frontal plane for RMS, range, ApEn, SaEn, and LyE, and in the sagittal plane for RMS, ApEn, SaEn, and RQA %REC in healthy controls. For persons with MS, significant correlations were found between trunk and foot accelerations in the frontal plane for RMS, range, and LyE, and in the sagittal plane for RMS, range, ApEn, and LyE. The current study found that
variability of upper and lower body segments was significantly altered in persons with MS compared to healthy controls. MS appears to affect the relationships between motion of the feet and motion of the trunk during walking indicating that underlying control mechanisms which govern gait stability may be altered in persons with MS. These control systems may be affected by the pathophysiology of MS, particularly the slowed conduction velocity in the neurons of the central nervous system which ultimately make up the…
Advisors/Committee Members: Huisinga, Jessie (advisor), Luchies, Carl (cmtemember), Wilson, Sara (cmtemember).
Subjects/Keywords: Biomechanics; Gait; Variability; Wireless Sensors
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APA (6th Edition):
Craig, J. J. (2015). Assessment of variability and coordination of upper and lower body segments during walking in healthy adults and persons with multiple sclerosis. (Masters Thesis). University of Kansas. Retrieved from http://hdl.handle.net/1808/20928
Chicago Manual of Style (16th Edition):
Craig, Jordan John-William. “Assessment of variability and coordination of upper and lower body segments during walking in healthy adults and persons with multiple sclerosis.” 2015. Masters Thesis, University of Kansas. Accessed February 27, 2020.
http://hdl.handle.net/1808/20928.
MLA Handbook (7th Edition):
Craig, Jordan John-William. “Assessment of variability and coordination of upper and lower body segments during walking in healthy adults and persons with multiple sclerosis.” 2015. Web. 27 Feb 2020.
Vancouver:
Craig JJ. Assessment of variability and coordination of upper and lower body segments during walking in healthy adults and persons with multiple sclerosis. [Internet] [Masters thesis]. University of Kansas; 2015. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/1808/20928.
Council of Science Editors:
Craig JJ. Assessment of variability and coordination of upper and lower body segments during walking in healthy adults and persons with multiple sclerosis. [Masters Thesis]. University of Kansas; 2015. Available from: http://hdl.handle.net/1808/20928
University of Nairobi
20.
Sabiiti, Geoffrey.
Modelling Climate Variability and Climate Change and Their Associated Effects on Highland Cooking Banana Production in Uganda
.
Degree: 2016, University of Nairobi
URL: http://hdl.handle.net/11295/100126
► Climate extremes associated with climate variability and change are on the rise both in time and space. These extremes have far reaching impacts on socio-economic…
(more)
▼ Climate extremes associated with climate variability and change are on the rise both in time and space. These extremes have far reaching impacts on socio-economic sectors particularly for countries like Uganda that rely heavily on rain-fed agriculture. The highland cooking banana (Musa genome group AAA-EA) is a major food crop in Uganda. Its continuous cycles of harvests makes it an important crop for enhancing food security and farmers' incomes. Studies have, however, observed continuous decline in banana productivity due to biological and environmental factors including climate extremes.
This study is aimed at investigating the extent of climate variability and climate change and their associated effects on banana production over Uganda. The study used historical observed climate data (1931 to 2013), banana yields (1971 to 2009) and model simulated climate data (1991 to 2100). Climate data analysed consisted mainly of rainfall and temperature. The Providing Regional Climates for Impacts Studies (PRECIS) Regional Climate Model (RCM) was used to simulate high resolution climate projections based on the Special Report on Emission Scenarios (SRES) A1B and A2 scenarios. The study also analysed climate projection data based on the full range of the Inter-governmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) Representative Concentration Pathways (RCPs) as policy scenarios.
In order to detect climate variability and change signals, the observed seasonal climate data were subjected to empirical analyses. This involved determination of the first upto fourth moments. The shift in the first moment constituted the trend whose significance was evaluated using the Mann-Kendall test. The moments of both standardized climate data and banana yields were determined and used to identify linkages between current climate variability and banana yields. The Crop Water Assessment Tool (CROPWAT) was used to determine banana water requirements, moisture deficits and yield reductions for the current period. The Pearson’s product-moment correlation coefficient, Refined Wilmott Index and Root Mean Square Errors (RMSE) were used to assess climatemodel performance. Empirical Orthogonal Functions (EOFs) were used to characterize modes of climate variability in both observed and model seasonal rainfall. Comparative graphical analysis based on geo-spatial mapping techniques was used to analyse and map climate variability and change patterns from the high resolution future climate projection information for rainfall, temperature and soil moisture content based on different scenarios. The response of banana growth to expected changes in temperature under
vi
A1B and A2 scenarios was assessed using a banana-temperature growth regression model. The FAO Eco-crop tool was used to estimate suitable climate conditions for optimal banana growth. The mapping of future suitability of banana during the period (2041-2080) was undertaken using ARCGIS.
The results showed that inter annual seasonal rainfall and temperature trends varied…
Subjects/Keywords: Modelling Climate Variability and Climate
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APA ·
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APA (6th Edition):
Sabiiti, G. (2016). Modelling Climate Variability and Climate Change and Their Associated Effects on Highland Cooking Banana Production in Uganda
. (Thesis). University of Nairobi. Retrieved from http://hdl.handle.net/11295/100126
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sabiiti, Geoffrey. “Modelling Climate Variability and Climate Change and Their Associated Effects on Highland Cooking Banana Production in Uganda
.” 2016. Thesis, University of Nairobi. Accessed February 27, 2020.
http://hdl.handle.net/11295/100126.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sabiiti, Geoffrey. “Modelling Climate Variability and Climate Change and Their Associated Effects on Highland Cooking Banana Production in Uganda
.” 2016. Web. 27 Feb 2020.
Vancouver:
Sabiiti G. Modelling Climate Variability and Climate Change and Their Associated Effects on Highland Cooking Banana Production in Uganda
. [Internet] [Thesis]. University of Nairobi; 2016. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/11295/100126.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sabiiti G. Modelling Climate Variability and Climate Change and Their Associated Effects on Highland Cooking Banana Production in Uganda
. [Thesis]. University of Nairobi; 2016. Available from: http://hdl.handle.net/11295/100126
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Nairobi
21.
Opiyo, Francis E O.
Climate variability and change on vulnerability and adaptation among Turkana pastoralists in North-Western Kenya
.
Degree: 2014, University of Nairobi
URL: http://hdl.handle.net/11295/77661
► Climate variability and change is increasingly being recognized as a critical challenge to pastoral production systems in the arid and semi-arid rangelands. The projected climate…
(more)
▼ Climate variability and change is increasingly being recognized as a critical challenge to pastoral
production systems in the arid and semi-arid rangelands. The projected climate scenarios are
expected to aggravate some of the existing vulnerability of natural resource-dependent
communities, and likely to impose new risks beyond the range of current experiences. An
explicit understanding of households‟ vulnerability to climate variability and adaptation
strategies is, therefore, crucial for targeting appropriate resilience interventions in pastoral
environments. This study focused on better understanding of climate variability and change, in
order to provide insights on pastoralists‟ risk management adaptations at a micro-level. In
addition, the study investigated vegetation responses to precipitation anomalies in Turkana
County of Kenya.
The research study used Mann-Kendall test statistics to investigate long-term rainfall (19502012)
and temperature (1978-2012) changes. Household questionnaire survey, focus group
discussion and key informants‟ interviews were used to collect primary data at household and
community levels. A total of 302 households were sampled using multi-stage sampling
technique, and information obtained analyzed using descriptive statistics and ordinal logistic
regression model. In addition, Normalized Difference Vegetation Index (NDVI) data derived
from Advance Very High Resolution Radiometer (AVHRR) satellite were overlaid with
precipitation to generate vegetation maps. Analysis of variance (ANOVA) was used to analyse
vegetation species richness and abundance in the study area.
The result revealed high inter-annual (coefficient of variation > 90%) rainfall variability, with
seasonal uncertainty. There were more years with below normal rainfall than those with mean
rainfall above long-term mean (LTM). Results indicate that extreme drought events have
increased over the last 63 years, with 28.5% occurrences between 1950 and 1970, to 47.9% over
the last two decades between 1990 and 2012. Further, the study revealed that the area is warming
at 0.13°C, with a significant (p<0.05) rise in both minimum (0.2°C), maximum (0.1°C)
temperature for the period 1979 - 2012. Pastoralists‟ perception of changes in climate
climate variability and change are being felt by many households in Turkana. The vulnerability
index analysis showed that majority of households were moderately (44%) to highly (27%)
vulnerable to climate-induced stresses. Factor estimates of the probit model further revealed that
the main determinants of pastoralists‟ vulnerability were sex of household head, number of
dependents, marital status, social linkages, access to extension services and early warning
information, herd structure and mobility, distance to markets, and access to affordable credit.
The results highlight the need for interventions to empower women in the access to education,
affordable credits, livelihood diversification opportunities, and to resources that can strengthen
households‟…
Subjects/Keywords: Climate variability;
Turkana pastoralists
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Manager
APA (6th Edition):
Opiyo, F. E. O. (2014). Climate variability and change on vulnerability and adaptation among Turkana pastoralists in North-Western Kenya
. (Thesis). University of Nairobi. Retrieved from http://hdl.handle.net/11295/77661
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Opiyo, Francis E O. “Climate variability and change on vulnerability and adaptation among Turkana pastoralists in North-Western Kenya
.” 2014. Thesis, University of Nairobi. Accessed February 27, 2020.
http://hdl.handle.net/11295/77661.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Opiyo, Francis E O. “Climate variability and change on vulnerability and adaptation among Turkana pastoralists in North-Western Kenya
.” 2014. Web. 27 Feb 2020.
Vancouver:
Opiyo FEO. Climate variability and change on vulnerability and adaptation among Turkana pastoralists in North-Western Kenya
. [Internet] [Thesis]. University of Nairobi; 2014. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/11295/77661.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Opiyo FEO. Climate variability and change on vulnerability and adaptation among Turkana pastoralists in North-Western Kenya
. [Thesis]. University of Nairobi; 2014. Available from: http://hdl.handle.net/11295/77661
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
The Ohio State University
22.
Slauson, Leigh Victoria.
Students' conceptual understanding of variablity.
Degree: PhD, Teaching and Learning, 2008, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1199117318
► Research has shown that even if a student passes a standard introductory statistics course, they often still lack the ability to reason statistically. This…
(more)
▼ Research has shown that even if a student
passes a standard introductory statistics course, they often still
lack the ability to reason statistically. This is especially true
when it comes to reasoning about
variability.
Variability is one
the core concepts in statistics, yet many students come away from
introductory course unable to discuss basic ideas of
variability or
make the connection between graphical displays of data and measures
of
variability. This study investigated
students' conceptual understanding of
variability by focusing on
two numerical measures of
variability: standard deviation and
standard error. Two sections of introductory statistics were taught
at a small Midwestern liberal arts college. One section was taught
with standard lecture methods for the topics of standard deviation,
sampling distributions and standard error, and confidence intervals
and the margin of error. The other section completed a hands-on
active learning lab for each these topics. These labs were designed
with a conceptual change framework. Students were asked to use
prior knowledge to make predictions, collect and analyze data to
test their predictions, and then evaluate their predictions in
light of their results. Assessment questions designed to test
conceptual knowledge were included at the end of each
lab. Both classes completed the Comprehensive
Assessment of Outcomes in a first Statistics course (CAOS) as a
pretest and a posttest. Assessment questions from the active
learning labs were analyzed and coded. A small number of students
from each section participated in twenty-minute
interviews. Students' conceptual understanding
of standard deviation improved in the active class, but not in the
lecture class. There was no evidence of improvement on the topic of
standard error in either class. The qualitative data suggests
understanding the connection between data distributions and
measures of
variability, and understanding the connection between
probability concepts and
variability is very important for students
to understand standard error. There is evidence that students come
to an introductory statistics course with more conceptual knowledge
related to sampling distributions than previously thought. There is
evidence that the feedback portion of hands-on active labs is the
most important feature of the conceptual change
framework.
Advisors/Committee Members: Brosnan, Patti (Advisor).
Subjects/Keywords: Statistics Education; Variability; Active Learning
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APA (6th Edition):
Slauson, L. V. (2008). Students' conceptual understanding of variablity. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1199117318
Chicago Manual of Style (16th Edition):
Slauson, Leigh Victoria. “Students' conceptual understanding of variablity.” 2008. Doctoral Dissertation, The Ohio State University. Accessed February 27, 2020.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1199117318.
MLA Handbook (7th Edition):
Slauson, Leigh Victoria. “Students' conceptual understanding of variablity.” 2008. Web. 27 Feb 2020.
Vancouver:
Slauson LV. Students' conceptual understanding of variablity. [Internet] [Doctoral dissertation]. The Ohio State University; 2008. [cited 2020 Feb 27].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1199117318.
Council of Science Editors:
Slauson LV. Students' conceptual understanding of variablity. [Doctoral Dissertation]. The Ohio State University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1199117318
University of Cape Town
23.
Levey, K M (Kevin M).
Intra-seasonal oscillations of convection over southern Africa.
Degree: MSc, Oceanography, 1993, University of Cape Town
URL: http://hdl.handle.net/11427/17382
► This work examines intra-seasonal rainfall variability over the summer rainfall region of South Africa. Spectral analysis of a precipitation minus evaporation index (P-E) compiled from…
(more)
▼ This work examines intra-seasonal rainfall
variability over the summer rainfall region of South Africa. Spectral analysis of a precipitation minus evaporation index (P-E) compiled from 16 rainfall stations in the western Transvaal region of South Africa has shown that two dominant spectral peaks occur in the water budget or convection as identified by an outgoing longwave radiation (OLR) index and P-E index. A longer 40-60 day oscillation or Madden Julian Oscillation (MJO) and a shorter 20-30 day ISO are identified. The interaction between the Rossby waves of the mid-latitudes and the MJO of tropics appears to be the main cause of the 20-30 day ISO operating over southern Africa. Hovmoller analysis at 10° S and 40° S has shown that four modes exist in the propagation and oscillatory characteristics of various anomalies. Eastward and westward propagation is noted as well as standing wave patterns and "flip-flop" modes where anomalies alternate between positive and negative across the latitude band with time. The composite analysis revealed a tropically initiated signal of the 20-30 day ISO in the water vapour flux (WVF) anomaly field where strong easterly WVF vectors are noted between the equator and 10°S and between 40° E and 80° E. Strong convergence of water vapour occurs during the wet phase of the 20-30 day ISO over the south-western Indian Ocean and together with strong ridging of the South Atlantic Anticyclone (SAA) causes the south-easterly advection of moisture from the southern Mozambique Channel and over the warm Agulhas Current into South Africa. Post-wet phase anomaly composites do not show much similarity with pre-cursor anomaly composites. This implies that the 20-30 day ISO may be a half cycle of 40-60 days which is consistent with the MJO. However, it is felt that 20-30 day ISO's affecting the southern African region alternate in intensity within the period of the MJO.
Advisors/Committee Members: Jury, Mark R.
Subjects/Keywords: rainfall variability
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APA (6th Edition):
Levey, K. M. (. M. (1993). Intra-seasonal oscillations of convection over southern Africa. (Masters Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/17382
Chicago Manual of Style (16th Edition):
Levey, K M (Kevin M). “Intra-seasonal oscillations of convection over southern Africa.” 1993. Masters Thesis, University of Cape Town. Accessed February 27, 2020.
http://hdl.handle.net/11427/17382.
MLA Handbook (7th Edition):
Levey, K M (Kevin M). “Intra-seasonal oscillations of convection over southern Africa.” 1993. Web. 27 Feb 2020.
Vancouver:
Levey KM(M. Intra-seasonal oscillations of convection over southern Africa. [Internet] [Masters thesis]. University of Cape Town; 1993. [cited 2020 Feb 27].
Available from: http://hdl.handle.net/11427/17382.
Council of Science Editors:
Levey KM(M. Intra-seasonal oscillations of convection over southern Africa. [Masters Thesis]. University of Cape Town; 1993. Available from: http://hdl.handle.net/11427/17382
NSYSU
24.
Chi, Chia-Fa.
Study on the adaptation to impacts of land subsidence in Chiangyuan area, Pingtung, Taiwan.
Degree: Master, IMA, 2009, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0826109-184219
► Land subsidence is a common phenomenon worldwide. When mitigation has approached a limitation, adaptation becomes an important strategy for sustainable development. Specially, climate variability and…
(more)
▼ Land subsidence is a common phenomenon worldwide. When mitigation has approached
a limitation, adaptation becomes an important strategy for sustainable development. Specially,
climate
variability and changes can make more serious impacts on coastal areas. This study
focused on adaptation to land subsidence in Chiangyuan area consisting of several coastal
villages, Pingtung county, Taiwan. Little research about the adaptations had been done in this
area, except there was some studies for its awareness.
Using a case study approach with questionnaires, in-depth interview, direct observation,
this study explored past and existed adaptation behaviour in different categories of
stakeholders. Moreover, we also tried to analyze the capacity of these adaptation for future
impacts from land subsidence and flood made by climate change, and could increase the
capacity.
The results have revealed local people in Chiangyuan area had abundant experiences on
adaptations to land subsidence and flood. They used different kinds of adaptation at same time
to cope with flooding, land loss, and salted land problems. The followings have summarized
the adaptation of four categories of stakeholders.
1. for local citizen, the major adaptation is house-elevating, who didnât adopt
house elevating were without budget or planning to move out.
2. for farmer, planting economic fruits with higher tolerance to salt-water.
3. for aquaculture, fish-pond elevating, harvesting earlier, or building fish-pond on
higher land.
4. for school, using water-proof gates or no classes during flooding.
Some suggestion focused on adaptation to land subsidence was also given in this study,
specially for government.
Advisors/Committee Members: Yen-Lien Kuo (chair), Jeng-Di Lee (committee member), Chung-Pan Lee (chair).
Subjects/Keywords: land subsidence; adaptation; climate variability
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Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Chi, C. (2009). Study on the adaptation to impacts of land subsidence in Chiangyuan area, Pingtung, Taiwan. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0826109-184219
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chi, Chia-Fa. “Study on the adaptation to impacts of land subsidence in Chiangyuan area, Pingtung, Taiwan.” 2009. Thesis, NSYSU. Accessed February 27, 2020.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0826109-184219.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chi, Chia-Fa. “Study on the adaptation to impacts of land subsidence in Chiangyuan area, Pingtung, Taiwan.” 2009. Web. 27 Feb 2020.
Vancouver:
Chi C. Study on the adaptation to impacts of land subsidence in Chiangyuan area, Pingtung, Taiwan. [Internet] [Thesis]. NSYSU; 2009. [cited 2020 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0826109-184219.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chi C. Study on the adaptation to impacts of land subsidence in Chiangyuan area, Pingtung, Taiwan. [Thesis]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0826109-184219
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
25.
Kao, Ruei-Da.
Possible Applications of ECG Signal Harmonics.
Degree: Master, Mechanical and Electro-Mechanical Engineering, 2012, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719112-110208
► Via the delivery of blood, heart transfers oxygen and nutrients to various organs and is thus a highly influential for circulatory system. To adapt to…
(more)
▼ Via the delivery of blood, heart transfers oxygen and nutrients to various organs and is thus a highly influential for circulatory system. To adapt to the variation of physiological conditions, the intensity and frequency of heart beats change with time. Careful observation finds that the time intervals between heartbeats are often different even if the body is at rest. Such heart rate
variability (HRV) has been used to estimate the activity of the autonomic nervous system which can be divided into sympathetic and parasympathetic subsystems both of which can significantly affect the physiology of the human body. As a result, HRV has been used as a physiological indicator to assist doctors in making diagnostic decisions.
Many studies have used HRV to analyze the ECG signal via studying the QRS complex waveform to determine the time intervals between R-peaks and analyze the R-R intervals from time and frequency domains. Different from the conventional R-R Interval based approach, this work introduces new HRV feature variables by computing spectrogram of the ECG signal waveform. In particular, based on the harmonics of the spectrum, we introduce the concepts of modes. By find the relative amount of energy associated with each mode and degree-of-energy-concentration associated with each mode, this work introduces two sets of new HRV features. In addition, we also investigate how these variables change with time and the correlations between these features.
To demonstrate the potential of the proposed features, the differences of the values of the proposed features are compared for healthy individuals versus OSA patients, young versus old and male versus female. The experimental results show the differences between many of the tested features are statistically significant.
Advisors/Committee Members: Jiann-Der Lee (chair), Liang-Wen Hang (chair), Chen-Wen Yen (committee member).
Subjects/Keywords: ECG; heart rate variability; spectrograms
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APA ·
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MLA ·
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CSE |
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kao, R. (2012). Possible Applications of ECG Signal Harmonics. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719112-110208
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kao, Ruei-Da. “Possible Applications of ECG Signal Harmonics.” 2012. Thesis, NSYSU. Accessed February 27, 2020.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719112-110208.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kao, Ruei-Da. “Possible Applications of ECG Signal Harmonics.” 2012. Web. 27 Feb 2020.
Vancouver:
Kao R. Possible Applications of ECG Signal Harmonics. [Internet] [Thesis]. NSYSU; 2012. [cited 2020 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719112-110208.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kao R. Possible Applications of ECG Signal Harmonics. [Thesis]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719112-110208
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Louisiana State University
26.
Love, Andromeda Patrice.
Evaluating the effects of dialect on kindergartners' use of three grammatical structures in narratives.
Degree: MA, Communication Sciences and Disorders, 2014, Louisiana State University
URL: etd-04022014-194729
;
https://digitalcommons.lsu.edu/gradschool_theses/501
► The aim of this study was to determine if dialect status has an effect on the frequency at which kindergarteners produce nonmainstream English markings for…
(more)
▼ The aim of this study was to determine if dialect status has an effect on the frequency at which kindergarteners produce nonmainstream English markings for regular third person, IS and ARE, and regular past tense when producing oral narratives. Specifically, I wished to determine if child speakers of African American English (AAE) and child speakers of Southern White English (SWE) mark these structures with nonmainstream English forms at different rates. The narrative data came from language samples that had been previously collected from twenty kindergarten speakers of AAE and twenty kindergarten speakers of SWE. All of the children were recruited from various primary schools in rural Louisiana, and their dialect status was confirmed with a listener judgment task. The narratives were elicited by asking the children to produce narratives based on three to four pictures. Their narratives were then transcribed and coded. Once the narratives were transcribed, the target grammar structures were coded as mainstream overt, nonmainstream overt, or nonmainstream zero. The rate of nonmainstream marking was calculated by dividing each child’s number of nonmainstream overt and nonmainstream zero markings by the total number of opportunities that each child had to produce the structures. For all three grammar structures, the AAE-speaking children producing higher rates of nonmainstream marking than their SWE-speaking peers. Additionally, it was found that both groups were more likely to produce nonmainstream forms with the auxiliary than copular BE form. These findings suggest that the rate of nonmainstream marking in narratives differs based on a child’s dialect status in ways that are consistent with what has been documented in studies of conversational language samples. However, by comparing the current results to a previous study of the grammatical structures produced in conversation, it was found that narratives were more likely to elicit past tense structures while conversations were more likely to elicit present tense structures.
Subjects/Keywords: task variability; oral narratives; microstructure
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Manager
APA (6th Edition):
Love, A. P. (2014). Evaluating the effects of dialect on kindergartners' use of three grammatical structures in narratives. (Masters Thesis). Louisiana State University. Retrieved from etd-04022014-194729 ; https://digitalcommons.lsu.edu/gradschool_theses/501
Chicago Manual of Style (16th Edition):
Love, Andromeda Patrice. “Evaluating the effects of dialect on kindergartners' use of three grammatical structures in narratives.” 2014. Masters Thesis, Louisiana State University. Accessed February 27, 2020.
etd-04022014-194729 ; https://digitalcommons.lsu.edu/gradschool_theses/501.
MLA Handbook (7th Edition):
Love, Andromeda Patrice. “Evaluating the effects of dialect on kindergartners' use of three grammatical structures in narratives.” 2014. Web. 27 Feb 2020.
Vancouver:
Love AP. Evaluating the effects of dialect on kindergartners' use of three grammatical structures in narratives. [Internet] [Masters thesis]. Louisiana State University; 2014. [cited 2020 Feb 27].
Available from: etd-04022014-194729 ; https://digitalcommons.lsu.edu/gradschool_theses/501.
Council of Science Editors:
Love AP. Evaluating the effects of dialect on kindergartners' use of three grammatical structures in narratives. [Masters Thesis]. Louisiana State University; 2014. Available from: etd-04022014-194729 ; https://digitalcommons.lsu.edu/gradschool_theses/501
Louisiana State University
27.
Proto, Daniel.
Intra-individual variability in adult ADHD: an exploration of the viability of distinct purely inattentive condition.
Degree: PhD, Psychology, 2012, Louisiana State University
URL: etd-08102012-174538
;
https://digitalcommons.lsu.edu/gradschool_dissertations/654
► Researchers have suggested that intraindividual variability (IIV), or variation in cognitive testing performance within an individual across a measure or group of measures, may be…
(more)
▼ Researchers have suggested that intraindividual variability (IIV), or variation in cognitive testing performance within an individual across a measure or group of measures, may be an endophenotypic marker of Attention-Deficit/Hyperactivity Disorder (ADHD). However, not all studies have consistently demonstrated significant differences in IIV between individuals with and without ADHD. One potential explanation for this ambiguity is experimental group heterogeneity owing to Sluggish Cognitive Tempo (SCT). Individuals with SCT exhibit behavioral characteristics dissimilar from individuals with ADHD; rather than being impulsive, hyperactive, and aggressive, they tend to be shy, day-dreamy, and cognitively slow. Researchers have hypothesized that the presence of SCT in the absence of hyperactivity may reflect a distinct purely-inattentive condition that is currently diagnosed as ADHD. If these purely inattentive individuals are included in ADHD experimental groups, they could obfuscate between-groups differences. Unfortunately, few studies have attempted to separate purely inattentive individuals from those with ADHD, with none having examined cognitive functioning after such a separation and in adults. The purpose of the current study, then, was to attempt to identify and separate adults with “pure inattention” from adults with ADHD, and to then compare the groups’ performances on a large neuropsychological test battery. Of particular interest were measured group differences in IIV—operationalized as both reaction time standard deviation and intraindividual standard deviation (ISD)—and SCT as assessed by objective cognitive testing. Cluster analysis was used to identify experimental groups via responses to twelve items on the Wender Utah Rating Scale (WURS). Individuals were also grouped, in separate analyses, by DSM-IV-TR ADHD subtype, and by their degree of endorsed SCT-like symptoms on the WURS. Results indicated that the use of the selected items from the WURS, combined with cluster analysis, was not an effective method of delineating a purely inattentive group. No significant between-groups effects were identified across any of the three grouping methods with respect to IIV or SCT. The implications of these results are discussed, and future research directions are suggested.
Subjects/Keywords: adult ADHD; intraindividual variability; inattention
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Proto, D. (2012). Intra-individual variability in adult ADHD: an exploration of the viability of distinct purely inattentive condition. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-08102012-174538 ; https://digitalcommons.lsu.edu/gradschool_dissertations/654
Chicago Manual of Style (16th Edition):
Proto, Daniel. “Intra-individual variability in adult ADHD: an exploration of the viability of distinct purely inattentive condition.” 2012. Doctoral Dissertation, Louisiana State University. Accessed February 27, 2020.
etd-08102012-174538 ; https://digitalcommons.lsu.edu/gradschool_dissertations/654.
MLA Handbook (7th Edition):
Proto, Daniel. “Intra-individual variability in adult ADHD: an exploration of the viability of distinct purely inattentive condition.” 2012. Web. 27 Feb 2020.
Vancouver:
Proto D. Intra-individual variability in adult ADHD: an exploration of the viability of distinct purely inattentive condition. [Internet] [Doctoral dissertation]. Louisiana State University; 2012. [cited 2020 Feb 27].
Available from: etd-08102012-174538 ; https://digitalcommons.lsu.edu/gradschool_dissertations/654.
Council of Science Editors:
Proto D. Intra-individual variability in adult ADHD: an exploration of the viability of distinct purely inattentive condition. [Doctoral Dissertation]. Louisiana State University; 2012. Available from: etd-08102012-174538 ; https://digitalcommons.lsu.edu/gradschool_dissertations/654
University of Florida
28.
Foti, Steven J.
High School Students' Understanding of Variability.
Degree: PhD, Curriculum and Instruction - Teaching and Learning, 2017, University of Florida
URL: http://ufdc.ufl.edu/UFE0051448
► Variability is often considered a central concept in the subject of statistics. This dissertation presents a large-scale snapshot of United States high school students' understanding…
(more)
▼ Variability is often considered a central concept in the
subject of statistics. This dissertation presents a large-scale snapshot of United States high school students' understanding of
variability. Over seven hundred secondary students in high-performing districts from 6 different states, with statistics topics included in their high school standards, participated in the study. Data were collected from the participants using existing instrument designed to measure overall conceptual understanding of statistics through multiple-choice (MC) and constructed response (CR) items. These data were collected in the participants' classrooms during one 90-minute or two 45-minute testing sessions.
Advisors/Committee Members: JACOBBE,TIMOTHY (committee chair), MURATA,AKI (committee member), MANLEY,ANNE CORINNE (committee member).
Subjects/Keywords: education – solo – statistics – variability
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APA (6th Edition):
Foti, S. J. (2017). High School Students' Understanding of Variability. (Doctoral Dissertation). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0051448
Chicago Manual of Style (16th Edition):
Foti, Steven J. “High School Students' Understanding of Variability.” 2017. Doctoral Dissertation, University of Florida. Accessed February 27, 2020.
http://ufdc.ufl.edu/UFE0051448.
MLA Handbook (7th Edition):
Foti, Steven J. “High School Students' Understanding of Variability.” 2017. Web. 27 Feb 2020.
Vancouver:
Foti SJ. High School Students' Understanding of Variability. [Internet] [Doctoral dissertation]. University of Florida; 2017. [cited 2020 Feb 27].
Available from: http://ufdc.ufl.edu/UFE0051448.
Council of Science Editors:
Foti SJ. High School Students' Understanding of Variability. [Doctoral Dissertation]. University of Florida; 2017. Available from: http://ufdc.ufl.edu/UFE0051448
Montana Tech
29.
Islam, ASM F.
CO2 and O2 variability in the partially ice-covered Arctic Ocean.
Degree: MS, 2015, Montana Tech
URL: https://scholarworks.umt.edu/etd/4537
► Limited carbon cycle research has been conducted so far in the Arctic Ocean (AO) compared to many other open-ocean and coastal environments, with relatively…
(more)
▼ Limited carbon cycle research has been conducted so far in the Arctic Ocean (AO) compared to many other open-ocean and coastal environments, with relatively few studies of the inorganic carbon cycle and air-sea gas exchange. Understanding these processes in depth and understanding the physical, chemical, and biological processes that control carbon dioxide (CO2) and dissolved oxygen (DO) variability in the AO are crucial to predicting the future of the carbon cycle in the region and its impact on greenhouse gases and marine ecosystem processes, such as ocean acidification. To study the AO carbon cycle, in situ time-series data have been collected from the Canada Basin of the AO during late summer to autumn of 2012. Partial pressure of CO2 (pCO2), DO concentration, temperature, salinity, and chlorophyll-a fluorescence (Chl-a) were measured at 6-10 m depth under little ice and multi-year ice on two drifting platforms. The pCO2 levels were always below atmospheric saturation, whereas the seawater was almost always slightly supersaturated with respect to DO. Although the two time-series data were on an average only 222 km apart they had 10 ± 10% and 63 ± 16% ice cover and differed significantly in contributions from gas exchange and net community production (NCP). Modeled variability of CO2 and DO suggest that gas exchange, NCP and horizontal gradients are the main sources of the CO2 and DO variability in the partially ice-covered AO. Horizontal gradients dominated the more densely ice-covered region, with no significant NCP in the surface. These results suggest that the signature imparted on CO2 and DO in open water is widely disbursed under-ice and that biological production under multi-year ice is negligible due to lack of light and nutrients.
Subjects/Keywords: CO2; O2; variability; Arctic; Ocean
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Export
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Manager
APA (6th Edition):
Islam, A. F. (2015). CO2 and O2 variability in the partially ice-covered Arctic Ocean. (Masters Thesis). Montana Tech. Retrieved from https://scholarworks.umt.edu/etd/4537
Chicago Manual of Style (16th Edition):
Islam, ASM F. “CO2 and O2 variability in the partially ice-covered Arctic Ocean.” 2015. Masters Thesis, Montana Tech. Accessed February 27, 2020.
https://scholarworks.umt.edu/etd/4537.
MLA Handbook (7th Edition):
Islam, ASM F. “CO2 and O2 variability in the partially ice-covered Arctic Ocean.” 2015. Web. 27 Feb 2020.
Vancouver:
Islam AF. CO2 and O2 variability in the partially ice-covered Arctic Ocean. [Internet] [Masters thesis]. Montana Tech; 2015. [cited 2020 Feb 27].
Available from: https://scholarworks.umt.edu/etd/4537.
Council of Science Editors:
Islam AF. CO2 and O2 variability in the partially ice-covered Arctic Ocean. [Masters Thesis]. Montana Tech; 2015. Available from: https://scholarworks.umt.edu/etd/4537
Montana Tech
30.
Chaphalkar, Rachel Marie.
A longitudinal study of students' reasoning about variation in distributions in an introductory college statistics course.
Degree: PhD, 2015, Montana Tech
URL: https://scholarworks.umt.edu/etd/4402
► Current curricular documents including the Common Core State Standards (2010) and the Guidelines for Assessment and Instruction in Statistics Education (2005) have increased the need…
(more)
▼ Current curricular documents including the Common Core State Standards (2010) and the Guidelines for Assessment and Instruction in Statistics Education (2005) have increased the need for students' understanding and reasoning about statistics at both the K-12 and college levels. In addition, an increasing number of students are taking the Advanced Placement Statistics Exam (College Board, 2011) or a college-level introductory statistics course (Scheaffer & Stasny, 2000). One of the main components for statistical thinking is consideration of variation (Wild & Pfannkuch, 1999). Previous studies have shown that students have misconceptions about variation (e.g. Reading, 2004; Torok & Watson, 1999) and students often lack the ability to give sophisticated answers (Shaughnessy, 2007). The goal of this study was to better understand how students' reasoning about variation in a distributional context changes as they progress through an introductory college-level statistics course. In order to better understand the longitudinal nature of this process during a semester-long introductory statistics course, both quantitative and qualitative data were collected at three different times (beginning, middle, and end of the course) in surveys and interviews. The Structure of Observed Learning Outcomes (SOLO) Taxonomy (Biggs & Collis, 1982) was used to understand and assess the quality of their reasoning. Qualitative data came from two sources: three interviews from each of the ten interviewees and three survey questions on each of three surveys from all participants. The interviews were transcribed and responses were sorted into appropriate locations in the SOLO Taxonomy. After coding responses to each question in each interview, themes of progress were then identified. These themes showed that students progressed through four different paths of reasoning including: improved, maintained, decreased, and inconsistent. Quantitative data showed that while students were good at reasoning about situations involving bar graphs and dot plots with regards to comparing variability in distributions, they struggled with reasoning about histograms. Overall, this study found that there was no statistically significant improvement in reasoning about variability when comparing distributions as students progressed through a college-level introductory statistics course. This lack of improvement suggested that perhaps college students needed to have direct intervention or cognitive conflict in order to make more progress in reasoning about variability when comparing distributions.
Subjects/Keywords: distributions; reasoning; statistics; variability; variation
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APA (6th Edition):
Chaphalkar, R. M. (2015). A longitudinal study of students' reasoning about variation in distributions in an introductory college statistics course. (Doctoral Dissertation). Montana Tech. Retrieved from https://scholarworks.umt.edu/etd/4402
Chicago Manual of Style (16th Edition):
Chaphalkar, Rachel Marie. “A longitudinal study of students' reasoning about variation in distributions in an introductory college statistics course.” 2015. Doctoral Dissertation, Montana Tech. Accessed February 27, 2020.
https://scholarworks.umt.edu/etd/4402.
MLA Handbook (7th Edition):
Chaphalkar, Rachel Marie. “A longitudinal study of students' reasoning about variation in distributions in an introductory college statistics course.” 2015. Web. 27 Feb 2020.
Vancouver:
Chaphalkar RM. A longitudinal study of students' reasoning about variation in distributions in an introductory college statistics course. [Internet] [Doctoral dissertation]. Montana Tech; 2015. [cited 2020 Feb 27].
Available from: https://scholarworks.umt.edu/etd/4402.
Council of Science Editors:
Chaphalkar RM. A longitudinal study of students' reasoning about variation in distributions in an introductory college statistics course. [Doctoral Dissertation]. Montana Tech; 2015. Available from: https://scholarworks.umt.edu/etd/4402
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