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University of Manchester
1.
Viita, David.
Static and Dynamic Raman Spectroscopic Studies of Woven
Body Armour.
Degree: 2014, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217580
► This thesis, by David Viita, submitted for the degree of Doctor of Philosophy to the University of Manchester in September 2013, entitled “Static and Dynamic…
(more)
▼ This thesis, by David Viita, submitted for the
degree of Doctor of Philosophy to the
University of
Manchester in
September 2013, entitled “Static and Dynamic Raman Spectroscopic
Studies of Woven Body Armour”, studies the behaviour under strain
of the high strength para-aramid polymer fibre, Twaron® and fabrics
woven from it using Raman spectroscopy. These fabrics are widely
used in armour and the project aimed to understand how strain
developed in them during penetration. Three key conclusions were
reached. Firstly, as well as shifting near-linearly with strain,
the 1610 cm-1 spectral peak of Twaron broadens reversibly with
strain. The broadening follows an exponential curve. Others have
attributed this broadening to either molecular-level shear lag or
misorientation of the pleated crystallites causing unequal loading.
However, analysis of the data herein contradicts both
hypotheses.Secondly, in order to understand the shear lag that
occurs as fibres are strained over metal surfaces, Twaron yarns and
filaments were stretched over metal rods to replicate and extend
previous work by Kuo. Reasonable agreement with Kuo was found.
Fabric were then strained step-wise by indenting the fabric with a
bullet-shaped head. The strain in these fabrics was mapped from
yarn and sub-yarn (microscale) levels through Raman spectroscopy,
using the dependencies measured earlier in the thesis. The strain
along yarns was found to decay with distance from the bullet, due
to friction with transverse yarns. This data was initially fitted
with 2D Gaussian and Voigt curves. A theoretical underpinning was
then developed presenting a similar, yet distinct, behaviour to an
exponential decay. Typically, the strain decayed to 36% of its peak
value by 15 yarns distance (1.8 cm) from the bullet apex. The
strain was also mapped in two-layer fabrics which had a
misorientation between the layers. These two-layer fabrics had a
more “circular” strain profile than single-layer fabrics.Finally,
the measurement of strain in real time through Raman spectroscopy
was considered (“dynamic strain” tests). A spectrum simulator was
built in Excel® to predict how Raman spectra would appear when
taken from samples which changed strain state during the
measurement. This simulation produced realistic-looking spectra and
were analysed in the same manner as real data. The main difference
between spectra taken at a single strain and those taken with
changing strain was an increase in the apparent width of the peaks
due to their shifting during the measurement. Noise was added to
the simulated spectra through analysis of experimental data taken
at different exposure times.The simulation was then used to predict
the minimum change in strain that could be measured given the
signal noise. This is essential groundwork to interpreting spectra
taken during a shooting test on a fabric panel. It was predicted
that static curves could be distinguished from dynamic ones (0% to
3.4% strain) in spectra taken in 50 ms or less. Longer exposure
times enabled slower strain-changes to be…
Advisors/Committee Members: YOUNG, ROBERT RJ, Young, Robert, Kinloch, Ian.
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Chicago ·
MLA ·
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Manager
APA (6th Edition):
Viita, D. (2014). Static and Dynamic Raman Spectroscopic Studies of Woven
Body Armour. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217580
Chicago Manual of Style (16th Edition):
Viita, David. “Static and Dynamic Raman Spectroscopic Studies of Woven
Body Armour.” 2014. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217580.
MLA Handbook (7th Edition):
Viita, David. “Static and Dynamic Raman Spectroscopic Studies of Woven
Body Armour.” 2014. Web. 10 Apr 2021.
Vancouver:
Viita D. Static and Dynamic Raman Spectroscopic Studies of Woven
Body Armour. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217580.
Council of Science Editors:
Viita D. Static and Dynamic Raman Spectroscopic Studies of Woven
Body Armour. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:217580

University of Manchester
2.
Cao, Gaoxiang.
Multi-functional epoxy/graphene nanoplatelet
composites.
Degree: 2016, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:301217
► Graphene nanoplatelets (GNP) with thickness of 6 ~ 8 nm and lateral dimension of 5 μm (M5) and 25 μm (M25) have been used to…
(more)
▼ Graphene nanoplatelets (GNP) with thickness of 6 ~
8 nm and lateral dimension of 5 μm (M5) and 25 μm (M25) have been
used to prepare epoxy composites. Epoxy composites were fabricated
initially by shear mixing to investigate the effects of filler type
on the structure and properties of composites. The complex
viscosity of GNP-epoxy mixture was found to increase by almost
three orders of magnitude going from the neat epoxy to the 8 wt.%
loading, leading to difficulties in their processing. Scanning
electron microscopy of the composites showed that both fillers
aggregated at high loadings with the M25 buckling more easily due
to its larger diameter, which compromises its aspect ratio
advantage over M5, resulting in only slightly better mechanical
performance. Polarized Raman spectroscopy revealed that both M5 and
M25 were randomly distributed in the epoxy matrix, After adding M5
and M25 fillers, the storage modulus increase with the filler
loadings, however, the glass transition temperature (Tg) drops
slightly after initial incorporation, then rises with further
filler addition attributed to the pin effects of filler
aggregations. In terms of electrical property, M25 has lower
percolation (1 wt.%) than M5 composites due to its bigger aspect
ratio, which enable M25 to form a conductive network more
efficiently. Furthermore, M25 composites also have slightly better
thermal and mechanical properties over that of M5 composites.
However, the difference is not significant considering the aspect
ratio of M25 is five times of that of M5. The reason is that the
aggregation and buckling of M25 compromise its advantage over M5.
Due to the better performance of M25 as filler, M25/epoxy
composites were prepared by shear mixing, solvent compounding and
three-roll mill. Samples made by solvent compounding display the
lowest percolation threshold (0.5 wt.%), related to its relatively
uniform dispersion of M25 in matrix, resulting in higher thermal
conductivity and better mechanical properties. Water uptake in a
water bath at 50 °C took 75 days to be saturated. Higher loaded
samples have lower diffusion coefficient because of the barrier
effects of GNP fillers, but have higher maximum water absorbed,
which is owing to filler aggregation. Properties test of aged and
unaged specimens show thermal conductivity of the aged was enhanced
due to water’s higher thermal conductivity than epoxy resin matrix,
while electrical performance was compromised due to the swelling
effects caused by absorbed water. The mechanical properties of aged
samples also dropped slightly due to plasticization
effects.
Advisors/Committee Members: YOUNG, ROBERT RJ, Young, Robert, Kinloch, Ian.
Subjects/Keywords: Eopxy; Graphene nanoplatelet; composites; Impedance
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cao, G. (2016). Multi-functional epoxy/graphene nanoplatelet
composites. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:301217
Chicago Manual of Style (16th Edition):
Cao, Gaoxiang. “Multi-functional epoxy/graphene nanoplatelet
composites.” 2016. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:301217.
MLA Handbook (7th Edition):
Cao, Gaoxiang. “Multi-functional epoxy/graphene nanoplatelet
composites.” 2016. Web. 10 Apr 2021.
Vancouver:
Cao G. Multi-functional epoxy/graphene nanoplatelet
composites. [Internet] [Doctoral dissertation]. University of Manchester; 2016. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:301217.
Council of Science Editors:
Cao G. Multi-functional epoxy/graphene nanoplatelet
composites. [Doctoral Dissertation]. University of Manchester; 2016. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:301217

University of Manchester
3.
Yenni, Yenni.
THE EFFECTS OF TURBULENT KINETIC ENERGY, PHOSPHORUS
CONCENTRATION, SUSPENDED SEDIMENT CONCENTRATION, AND TIME INTERVAL
OF PHOSPHORUS LOADING ON PHOSPHORUS ADSORPTION ON SUSPENDED
SEDIMENT.
Degree: 2020, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323874
► This study reports the effects of four environmental factors on the amount of phosphorus adsorbed on suspended kaolin by applying the Box Behnken experimental design…
(more)
▼ This study reports the effects of four
environmental factors on the amount of phosphorus adsorbed on
suspended kaolin by applying the Box Behnken experimental design
and response surface methodology. Two factors (e.g. the phosphorus
and suspended sediment concentration) were screened out from the
literature review about variables having significant correlation
with the phosphorus adsorption. The other two factors (e.g. the
turbulent kinetic energy and time interval of phosphorus loading)
are new variables which are to the knowledge of the author have
never been considered adequately in the previous studies of
phosphorus adsorption. However, they potentially affect the amount
of phosphorus adsorbed on sediment. The range of turbulent kinetic
energy (47.9 to 707.9 cm/s2), the phosphorus concentration (3 to 6
mg/L), the suspended kaolin concentration (500 to 2100 mg/L), and
the time interval of phosphorus loading (30 minutes to eight hours)
are selected for the study in order to represent the condition in
Brantas River, Indonesia (after the period of wet season but before
the dry season starting from around March to May each year) which
was reported to have a problem with high level of phosphorus and
suspended sediment. The phosphorus adsorption are measured in 27
runs of laboratory experiments by using a mixing box with 48 Litre
of water volume oscillated by a horizontal grid producing a
relatively isotropic homogeneous turbulent in the horizontal plane.
Samples of water were taken and measured for phosphorus
concentration at the beginning and every two hours during the total
of eight hours of experimental runs by using DR3900
spectrophotometer. The amount of phosphorus adsorbed on suspended
kaolin was calculated as the difference between the amount of
PO43-P loaded into the mixing box and the PO43-P concentration
measured on the sampling time. The study shows that second order
models provide the best fit to the adsorption data at two, four and
eight hours of residence time (with R2=77.51%, 79.94%, 49.86%,
respectively). A first order model with interaction terms provides
the best fit to the data at six hour of residence time (R2 is
47.51%). Among the factors, the time interval of phosphorus loading
has the most significant effect on phosphorus adsorption. The
phosphorus concentration has greater effect at the beginning of the
reaction and the effect is less significant in the later duration
of observations. The suspended kaolin concentration has less effect
in the beginning of reaction, but the effect increases as the
duration of reactions increases. The turbulent kinetic energy shows
a more significant contribution in its quadratic form in the first
six hours of the experiment, and the effect diminishes in the last
two hours of residence time.
Advisors/Committee Members: YOUNG, ROBERT RJ, Lane-Serff, Gregory, Young, Robert.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yenni, Y. (2020). THE EFFECTS OF TURBULENT KINETIC ENERGY, PHOSPHORUS
CONCENTRATION, SUSPENDED SEDIMENT CONCENTRATION, AND TIME INTERVAL
OF PHOSPHORUS LOADING ON PHOSPHORUS ADSORPTION ON SUSPENDED
SEDIMENT. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323874
Chicago Manual of Style (16th Edition):
Yenni, Yenni. “THE EFFECTS OF TURBULENT KINETIC ENERGY, PHOSPHORUS
CONCENTRATION, SUSPENDED SEDIMENT CONCENTRATION, AND TIME INTERVAL
OF PHOSPHORUS LOADING ON PHOSPHORUS ADSORPTION ON SUSPENDED
SEDIMENT.” 2020. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323874.
MLA Handbook (7th Edition):
Yenni, Yenni. “THE EFFECTS OF TURBULENT KINETIC ENERGY, PHOSPHORUS
CONCENTRATION, SUSPENDED SEDIMENT CONCENTRATION, AND TIME INTERVAL
OF PHOSPHORUS LOADING ON PHOSPHORUS ADSORPTION ON SUSPENDED
SEDIMENT.” 2020. Web. 10 Apr 2021.
Vancouver:
Yenni Y. THE EFFECTS OF TURBULENT KINETIC ENERGY, PHOSPHORUS
CONCENTRATION, SUSPENDED SEDIMENT CONCENTRATION, AND TIME INTERVAL
OF PHOSPHORUS LOADING ON PHOSPHORUS ADSORPTION ON SUSPENDED
SEDIMENT. [Internet] [Doctoral dissertation]. University of Manchester; 2020. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323874.
Council of Science Editors:
Yenni Y. THE EFFECTS OF TURBULENT KINETIC ENERGY, PHOSPHORUS
CONCENTRATION, SUSPENDED SEDIMENT CONCENTRATION, AND TIME INTERVAL
OF PHOSPHORUS LOADING ON PHOSPHORUS ADSORPTION ON SUSPENDED
SEDIMENT. [Doctoral Dissertation]. University of Manchester; 2020. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323874

University of Manchester
4.
Wang, Fang.
Raman and Photoluminescence Spectroscopic Studies of the
Micromechanics of WS2 Nanocomposites.
Degree: 2018, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313220
► The reinforcement mechanism in WS2-based nanocomposites has been investigated in the project. It started with the deformation analysis on the micromechanical exfoliated WS2 (monolayer and…
(more)
▼ The reinforcement mechanism in WS2-based
nanocomposites has been investigated in the project. It started
with the deformation analysis on the micromechanical exfoliated WS2
(monolayer and fewlayer) and nanotube WS2 using photoluminescence
(monolayer only) and Raman spectroscopies. For monolayer, a massive
PL energy shift has been observed caused by uniaxial tensile strain
engineered optical bandgap. A new feature in the PL spectra
corresponding to the indirect band gap transition (Γ-T) has
emerged under moderate uniaxial stress level. In all cases,
significant Raman band shifts have been found for both E2g1 and A1g
modes due to strain-induced phonon softening. The E2g1 mode
undergoes splitting at high strain level, which was taken advantage
of to determine the crystalline orientation of exfoliated WS2. A
systematic study has been undertaken on the monolayer, bilayer,
trilayer and fewlayer WS2 under deformation to determine the
optimum the number of layers for reinforcement. An anomalous phonon
behavior for the thicker WS2 during deformation has been found and
addressed. By following the E2g1 mode and PL energy band, the
stress transfer in exfoliated WS2 has been examined in a model
composite under uniaxial strain. These behaviors have demonstrated
the WS2 can act as reinforcing phase in its nanocomposites and the
behavior can be predicted with shear lag theory. The study has also
suggested moderated interfacial bonding between the WS2 and polymer
matrix and given an implication of the use of WS2 for polymer
reinforcement. Finally, the bulk PVA nanocomposites reinforced by
liquid exfoliated WS2 were investigated to validate our finding
from the model composites. Significant increase in
Young’s modulus occurs at a very low WS2 loading. The
most effective reinforcement is brought by the incorporation of WS2
at 1.2 wt% fractions. The effective modulus of WS2 in the
composites was calculated by the rule of mixture. The interlayer
slippage of fewlayer WS2 has been found to be a significant factor
that compromises the reinforcing effect.
N\A
N\A
Advisors/Committee Members: YOUNG, ROBERT RJ, Kinloch, Ian, Young, Robert.
Subjects/Keywords: WS2; Raman; Photoluminescence; Polymer Nanocomposites
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wang, F. (2018). Raman and Photoluminescence Spectroscopic Studies of the
Micromechanics of WS2 Nanocomposites. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313220
Chicago Manual of Style (16th Edition):
Wang, Fang. “Raman and Photoluminescence Spectroscopic Studies of the
Micromechanics of WS2 Nanocomposites.” 2018. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313220.
MLA Handbook (7th Edition):
Wang, Fang. “Raman and Photoluminescence Spectroscopic Studies of the
Micromechanics of WS2 Nanocomposites.” 2018. Web. 10 Apr 2021.
Vancouver:
Wang F. Raman and Photoluminescence Spectroscopic Studies of the
Micromechanics of WS2 Nanocomposites. [Internet] [Doctoral dissertation]. University of Manchester; 2018. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313220.
Council of Science Editors:
Wang F. Raman and Photoluminescence Spectroscopic Studies of the
Micromechanics of WS2 Nanocomposites. [Doctoral Dissertation]. University of Manchester; 2018. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:313220

University of Manchester
5.
Howarth, James Andrew.
Exciton Dynamics in van der Waals
Heterostructures.
Degree: 2020, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323763
► This work details the fabrication and measurement of various two-dimensional (2D) material light emitting diodes, constructed as heterostructures of graphene, hexagonal boron nitride and transition…
(more)
▼ This work details the fabrication and measurement
of various two-dimensional (2D) material light emitting diodes,
constructed as heterostructures of graphene, hexagonal boron
nitride and transition metal dichalcogenide (TMD) monolayers.
Devices are created for two different projects in order to study
two interest topics currently at the forefront of 2D materials
research: interlayer excitons (IXs) and single photon emitters
(SPEs). For the IX studies, devices are fabricated in order to
electrically inject electrons and holes into a type-II band
alignment heterojunction formed from WSe2 and MoS2 monolayers.
Electroluminescence measurements of the devices demonstrated the
formation and emission of the expected interlayer exciton, between
the two K/K' points of the materials. The observed emission is
confirmed to be the interlayer exciton by its bias dependent
emission energy, which undergoes a blueshift to higher energies as
the bias is increased. This behaviour is explainable by considering
how the relative band alignment of each material shifts with
increasing bias. In addition, an upconversion process arising from
IX-IX interactions is also observed in three of the devices and a
similar upconversion-like process in one more. In this case, IX-IX
interactions allow the population of intralayer exciton states in
each TMD at biases where direct electrical injection into these
states is not possible. A mechanism for this is proposed by which a
large population of charge carriers may be achieved due to the
different positions of the K/K' points in the two TMDs, making
radiative recombination unfavourable. For the SPE project, a method
of fabrication is developed, building upon previous reports, in
order to purposely induce SPEs in specific locations of WSe2 and
WS2 which could then be transferred to other locations while
retaining the SPEs. The second half of Chapter 6 discusses
photoluminescence and electroluminescence phenomena observed in an
LED fabricated using the developed method. Narrow peaks indicative
of SPEs are observed with a wide range of different bias dependent
and magnetic field dependent behaviours. These different behaviours
are quantified in that section.
Advisors/Committee Members: YOUNG, ROBERT RJ, Novoselov, Konstantin, Young, Robert.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Howarth, J. A. (2020). Exciton Dynamics in van der Waals
Heterostructures. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323763
Chicago Manual of Style (16th Edition):
Howarth, James Andrew. “Exciton Dynamics in van der Waals
Heterostructures.” 2020. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323763.
MLA Handbook (7th Edition):
Howarth, James Andrew. “Exciton Dynamics in van der Waals
Heterostructures.” 2020. Web. 10 Apr 2021.
Vancouver:
Howarth JA. Exciton Dynamics in van der Waals
Heterostructures. [Internet] [Doctoral dissertation]. University of Manchester; 2020. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323763.
Council of Science Editors:
Howarth JA. Exciton Dynamics in van der Waals
Heterostructures. [Doctoral Dissertation]. University of Manchester; 2020. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:323763

University of Manchester
6.
Omotoso, Toyin.
Water quality profiling of rivers in a data-poor area:
Southwest Nigeria.
Degree: 2016, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:305657
► The current state of the art in water quality profiling is reviewed to lay a foundation in addressing concerns over poor data in developing countries…
(more)
▼ The current state of the art in water quality
profiling is reviewed to lay a foundation in addressing concerns
over poor data in developing countries which has not been
adequately covered by previous models. A particular focus is made
on Ogbese River, southwest Nigeria as a case study. A process-based
model with data-filling capability is projected which transforms
processes into an event as a reasonably easy way for assessing and
predicting river-water quality in the event of constraints in data
collection. The structure of the study involves: (i) hydrologic
modelling, (ii) hydraulic load modelling and (iii) instream water
quality modelling. The hydrologic modelling assesses and makes use
of satellite based rainfall estimates subject to processing and
reliability tests. A modification to the conceptual relationship of
rainfall distribution frequency which makes the model output
sensitive to the season was derived. The hydraulic load modelling
integrates diffuse sources of pollutant as spatial data in
combination with the catchment runoff. A distance decay weighing
factor was introduced into the export coefficient to better
determine the effective load delivered into the stream. The utility
of the model, implemented on WASP platform, was demonstrated by
showing how it can be used for scenario testing. Different
modelling concepts were evaluated in view of their ability to
produce predictions under changing circumstances using the
predictions as guide to management. This study promotes a knowledge
base in water quality processes by evaluation of the processes
which lead to the end product rather than using data monitoring.
The study structures understanding of the phenomena that
characterises river water quality and tailors it towards regulatory
applications and catchment planning. It, also, provides a
sustainable strategy to predict the river water quality, evaluate
the risks, and take proactive action in setting up an early warning
system, for data-poor regions.
No
No
No
Advisors/Committee Members: YOUNG, ROBERT RJ, Young, Robert, Lane-Serff, Gregory.
Subjects/Keywords: •Water quality; data-poor area; process-based model;
sustainable strategy
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Omotoso, T. (2016). Water quality profiling of rivers in a data-poor area:
Southwest Nigeria. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:305657
Chicago Manual of Style (16th Edition):
Omotoso, Toyin. “Water quality profiling of rivers in a data-poor area:
Southwest Nigeria.” 2016. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:305657.
MLA Handbook (7th Edition):
Omotoso, Toyin. “Water quality profiling of rivers in a data-poor area:
Southwest Nigeria.” 2016. Web. 10 Apr 2021.
Vancouver:
Omotoso T. Water quality profiling of rivers in a data-poor area:
Southwest Nigeria. [Internet] [Doctoral dissertation]. University of Manchester; 2016. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:305657.
Council of Science Editors:
Omotoso T. Water quality profiling of rivers in a data-poor area:
Southwest Nigeria. [Doctoral Dissertation]. University of Manchester; 2016. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:305657

University of Manchester
7.
Lin, Fei.
Production, Structure and Properties of Nanocarbon
Reinforced Metal Matrix Composites.
Degree: 2019, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322581
► Aluminium (Al) matrix composites, reinforced with 0.3, 0.5 or 1.0 wt. % graphene oxide (GO) or 0.5 wt. % carbon nanotubes (CNTs) were fabricated by…
(more)
▼ Aluminium (Al) matrix composites, reinforced with
0.3, 0.5 or 1.0 wt. % graphene oxide (GO) or 0.5 wt. % carbon
nanotubes (CNTs) were fabricated by the powder metallurgy (PM)
method comprised a ball milling step followed by hot extrusion. The
microstructure, texture, interfacial reactions and mechanical
behaviours of the composites were analysed and discussed and
compared with the control aluminium samples. In particular, in-situ
Raman spectroscopy was conducted during four-point bending tests to
investigate the interfacial stress transfer between the GO/CNTs and
the Al. The Al/GO composite exhibited a more refined microstructure
than pure Al due to the pinning effects of GO, which led to
improved mechanical properties. Whereas, the Al/CNT composite,
possessed the same mean grain size as the unreinforced material and
exhibited a decreased compressive yield stress, which was
attributed the low load transfer to the nanotubes due to their
large degree of agglomeration. Copper-tungsten composites were
produced by decorating graphene oxide (GO) flakes with 8 nm
diameter CuWO4.2H2O nanoparticles and then sintering them to form
the final component. The oxide nanoparticles were found to
self-assemble into platelets from the surfaces of the graphene
flakes. Upon sintering, the presence of graphene changed the final
grain morphology from an elongated needle to a polyhedral shape.
The oxide nanoparticles were not fully reduced to a pure metal,
whereas the GO was hydrogenated after the sintering, verified by
Raman spectroscopy. Cu-W matrix composites with different loadings
of GO were also successfully produced by flake powder metallurgy
which comprised of ball milling followed by spark plasma sintering.
Composites at all the loadings GO used (0.1 - 0.5 wt. %) showed
improved modulus relative to the base Cu20W80 system. The optimal
loading was found to be 0.1 wt. % GO for composites sintered at
temperatures of both 1000 and 1100 degree Celsius. These composites
had a higher Youngs modulus, yield strength, ultimate compressive
strength, strain to failure and electrical conductivity than the
control samples. The mechanical performance was further improved at
the higher temperature of 1100 degree Celsius. The wear resistance
the Cu20W80 was not affected by the addition of graphene. Higher
loadings of graphene were found to embrittle the composites and
reduce their electrical conductivity of the
composites.
Advisors/Committee Members: YOUNG, ROBERT RJ, Kinloch, Ian, Young, Robert.
Subjects/Keywords: Metal matrix composite; Graphene oxide; Carbon nanotube
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lin, F. (2019). Production, Structure and Properties of Nanocarbon
Reinforced Metal Matrix Composites. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322581
Chicago Manual of Style (16th Edition):
Lin, Fei. “Production, Structure and Properties of Nanocarbon
Reinforced Metal Matrix Composites.” 2019. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322581.
MLA Handbook (7th Edition):
Lin, Fei. “Production, Structure and Properties of Nanocarbon
Reinforced Metal Matrix Composites.” 2019. Web. 10 Apr 2021.
Vancouver:
Lin F. Production, Structure and Properties of Nanocarbon
Reinforced Metal Matrix Composites. [Internet] [Doctoral dissertation]. University of Manchester; 2019. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322581.
Council of Science Editors:
Lin F. Production, Structure and Properties of Nanocarbon
Reinforced Metal Matrix Composites. [Doctoral Dissertation]. University of Manchester; 2019. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322581
8.
Ali, Usman.
Configuration Management Process Maturity: Definition and
Maturation of Configuration Management for Aerospace and Defence
Industries.
Degree: 2014, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:220362
► This research focuses on the effective implementation and continuous improvement methodologies for Configuration Management practices within aerospace and defence industries. The research is conducted mainly…
(more)
▼ This research focuses on the effective
implementation and continuous improvement methodologies for
Configuration Management practices within aerospace and defence
industries. The research is conducted mainly to develop a
Configuration Management Maturity Model which is based on Critical
Success Factors and Barriers to Configuration Management
implementation. The motives behind this research were the lack of
understanding and problems in the implementation of high-grade
Configuration Management systems as highlighted by other
researchers.The research is conducted in three phases through
interviews and questionnaire surveys with experienced Configuration
Management professionals working in aerospace and defence
industries. The first part of this research identifies,
prioritizes, and categorizes the Critical Success Factors for
Configuration Management and devises a Configuration Management
Activity Model to help practationers in the effective
implementation and continuous improvement of the process. The
second part of the research sets out to identify and prioritize the
obstacles to effective implementation of Configuration Management
practices, categorized these obstacles into more manageable groups
of factors, and analysed the effects of multiple factors on
identification and rating of these barriers. Both studies were
conducted through mixed method research with in-depth interviews
followed by questionnaire surveys. The governance aspect of the
process is also investigated to a great deal in the second part
through interviews to conclude on process governance in various
setups.The third part of this research is related to the
development of a Configuration Management Maturity Model. It is
important to note that other maturity models on the topic are
generic in nature and emphasis on ‘what’ to implement instead of
‘how’ to implement which has left a gap of uncertainty that forced
us to devise a suitable framework. The Configuration Management
Maturity Model is an assessment tool which not only provides
benchmark information but also helps to identify the strengths and
weaknesses of the process. This maturity framework is unique in its
presentation and unlike previous maturity models, is based on
current Configuration Management practices, Critical Success
Factors, and Barriers to Configuration Management implementation.
This maturity model will help organizations to assess their current
level of maturity, identify rational targets for improvements, and
will help in providing action plans for enhancing their
configuration management process capability. Like the previous two
studies, this part of the research is conducted through
semi-structured interviews followed by questionniare
surveys.
Advisors/Committee Members: YOUNG, ROBERT RJ, Young, Robert, Kidd, Callum.
Subjects/Keywords: Configuration management; Software Configuration
Management; Configuration Management in Aerospace and Defence
Industries; Configuration Management Critical Success Factors;
Barriers to Configuration Management implementation; Critical
Success Factors; Process Barriers; Process Capabilities; Project
Management Critical Success Factors; Maturity Model; Process
Maturity; Process Improvement; Project Management; Quality
Management; Inferential Statistic; Parametric Tests; Non Parametric
Tests; Governance; Types of Organizational Structures.
…264
11
ABSTRACT
Name of the University: The University of Manchester
Submitted by: Usman… …he has given
The University of Manchester certain rights to use such Copyright, including… …Khan, Abdulrahman Alghamdi at The University of
Manchester whose support and companionship… …x29; at
The University of Manchester for review and comments. The final questionnaire was…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ali, U. (2014). Configuration Management Process Maturity: Definition and
Maturation of Configuration Management for Aerospace and Defence
Industries. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:220362
Chicago Manual of Style (16th Edition):
Ali, Usman. “Configuration Management Process Maturity: Definition and
Maturation of Configuration Management for Aerospace and Defence
Industries.” 2014. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:220362.
MLA Handbook (7th Edition):
Ali, Usman. “Configuration Management Process Maturity: Definition and
Maturation of Configuration Management for Aerospace and Defence
Industries.” 2014. Web. 10 Apr 2021.
Vancouver:
Ali U. Configuration Management Process Maturity: Definition and
Maturation of Configuration Management for Aerospace and Defence
Industries. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:220362.
Council of Science Editors:
Ali U. Configuration Management Process Maturity: Definition and
Maturation of Configuration Management for Aerospace and Defence
Industries. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:220362
9.
Daka, Miebaka Ransome.
Geotechnical properties of oil contaminated
soil.
Degree: 2015, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:262881
► This research investigated the effect of oil contamination on grading modulus, Atterberg limits, compaction, and hydraulic conductivity of bentonite-kaolinite-sand mixtures. An area that lacked experimental…
(more)
▼ This research investigated the effect of oil
contamination on grading modulus, Atterberg limits, compaction, and
hydraulic conductivity of bentonite-kaolinite-sand mixtures. An
area that lacked experimental data was chosen for the research.
Data on oil contaminated soil containing montmorillionte were
scarce; hence, bentonite-kaolinite-sand mixtures at oil contents of
0.0, 1.8, 3.5, 5.3 and 7.1% by dry mass of the soil were used for
the study. The first aspect of the study was the use of grading
modulus to confirm reduction of fine aggregate in the contaminated
soils. Atterberg limits tests were performed to determine the
liquid and plastic limits of uncontaminated and contaminated soils.
Proctor compaction tests were performed to determine the compaction
characteristics of the oil contaminated soils. Hydraulic
conductivity tests were performed using a Rowe cell. Aggregate size
distribution analysis of the oil contaminated soil mixtures showed
that the aggregate size distribution curves shifted from finer to
coarser as the oil content increased, indicating that oil
contamination caused reduction of fine aggregate in the soil while
forming soil clods. The Atterberg limits tests showed that the
liquid limit and plastic limit increased as oil contamination
increased in the soil mixtures. The plasticity index of the soils
also increased as oil contamination increased. It was deduced from
the research that soils 1 and 2 had plasticity index below 65%,
those of soils 3, 4 and 5 were above 65%. However, soil 3 had
plasticity index close to 65. The results of the compaction tests
with respect to maximum dry density and optimum water content
showed that oil contamination resulted in decreased maximum dry
density and optimum water content in the five soils. The hydraulic
conductivity of soil mixtures decreased as oil contamination
increased. Generally, soils 3, 4 and 5 had hydraulic conductivities
that were close to 1 x 10-9m/s. Soil 3 had plasticity index close
to 65% and hydraulic conductivity less than 1 x 10-9m/s, hence, it
is suitable as soil liner for landfill. However, soils with
plasticity index above 65% are difficult to
handle.
Advisors/Committee Members: YOUNG, ROBERT RJ, Syed, Mohd Ahmad, Young, Robert.
Subjects/Keywords: geotechnical; oil; contaminated; soil
…Word count: 37536
28
Name of the University: The University of Manchester
Submitted by… …Copyright”) and he has given The
University of Manchester certain rights to use such…
Record Details
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Share »
Record Details
Similar Records
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Daka, M. R. (2015). Geotechnical properties of oil contaminated
soil. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:262881
Chicago Manual of Style (16th Edition):
Daka, Miebaka Ransome. “Geotechnical properties of oil contaminated
soil.” 2015. Doctoral Dissertation, University of Manchester. Accessed April 10, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:262881.
MLA Handbook (7th Edition):
Daka, Miebaka Ransome. “Geotechnical properties of oil contaminated
soil.” 2015. Web. 10 Apr 2021.
Vancouver:
Daka MR. Geotechnical properties of oil contaminated
soil. [Internet] [Doctoral dissertation]. University of Manchester; 2015. [cited 2021 Apr 10].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:262881.
Council of Science Editors:
Daka MR. Geotechnical properties of oil contaminated
soil. [Doctoral Dissertation]. University of Manchester; 2015. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:262881
.