subject:(dependent diversity)

University of Rochester

1. Scantlebury, Daniel Patrick (1985 - ). Patterns of adaptive radiation in insular reptiles and amphibians.

Degree: PhD, 2014, University of Rochester

► Life on Earth may be characterized by many patterns. The species that surround us are not only numerous, they are often phenotypically and ecologically diverse.… (more)

▼ Life on Earth may be characterized by many patterns. The species that surround us are not only numerous, they are often phenotypically and ecologically diverse. The fossil records shows that these species and their phenotypic diversity arose heterogeneously throughout history, and further inspection demonstrates species and phenotypes are nonrandomly distributed across the globe and environments. Ecology and evolutionary biology attempt to explain how these patterns emerge by identifying underlying processes. For instance, Charles Darwin and Alfred Russell Wallace recognized that there were similarities between the species inhabiting adjacent regions and proposed that organic evolution (common descent and modification) can explain these similarities as an alternative to special creation. My research explores three patterns that emerge from the examination of life, and how a single evolutionary process is capable of generating these patterns. That process is adaptive radiation. Adaptive radiation occurs as a response to ecological opportunity in a diversifying lineage. It is an interaction between speciation and adaptation that results in ecologically distinctive new species. If the ecological opportunities available to a diversifying lineage are limited, then rates of speciation and adaptation might decline during the course of adaptive radiation, potentially contributing to differential rates of diversification seen in both the fossil record and molecular phylogenies. Furthermore, if adaptive radiation produces the ecological diversity necessary for species to survive in a variety of climates and habitats, then it might also explain how and why species distribute themselves across landscapes. Although adaptive radiation has the potential to explain much about the diversity of life, current studies are limited to a few iconic clades making it difficult to identify the general elements of adaptive radiation because of vast historical contingencies. This thesis is a comparative effort that explores how adaptive radiation contributes to patterns of (1) species richness and ecological diversity, (2) macroevolutionary diversification rates, and (3) biogeography, by examining clades that radiated in similar regions, habitats, and times. In chapter 1 I focus on the pattern of species richness and phenotypic diversity: why are there groups of related species that differ phenotypically? In particular, I examine a group of predominately Caribbean geckos (Sphaerodactylus) and address whether or not the variation seen in the shape of their skulls has an adaptive origin. Sphaerodactylus geckos are remarkable because they are co-distributed with the wellstudied adaptive radiation of Anolis lizards and potentially provide an important system to evaluate the generalities of conclusions made from Anolis. I show that adaptive radiation probably contributed to variation seen in the shape of their skulls. I also suggest that Sphaerodactylus and Anolis both possess ecologically distinct habitat …

Subjects/Keywords: Adaptive radiation; Biogeography; Community assembly; Diversity dependent diversification; Geometric morphometrics; Sphaerodactylus

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Scantlebury, D. P. (. -. ). (2014). Patterns of adaptive radiation in insular reptiles and amphibians. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/28900

Chicago Manual of Style (16^th Edition):

Scantlebury, Daniel Patrick (1985 - ). “Patterns of adaptive radiation in insular reptiles and amphibians.” 2014. Doctoral Dissertation, University of Rochester. Accessed February 27, 2021. http://hdl.handle.net/1802/28900.

MLA Handbook (7^th Edition):

Scantlebury, Daniel Patrick (1985 - ). “Patterns of adaptive radiation in insular reptiles and amphibians.” 2014. Web. 27 Feb 2021.

Vancouver:

Scantlebury DP(-). Patterns of adaptive radiation in insular reptiles and amphibians. [Internet] [Doctoral dissertation]. University of Rochester; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1802/28900.

Council of Science Editors:

Scantlebury DP(-). Patterns of adaptive radiation in insular reptiles and amphibians. [Doctoral Dissertation]. University of Rochester; 2014. Available from: http://hdl.handle.net/1802/28900

Iowa State University

2. Flores, Daniela Victoria. Epigenetic variation in a reptile with temperature-dependent sex determination and inspiring a diverse future for STEM.

Degree: 2019, Iowa State University

URL: https://lib.dr.iastate.edu/etd/17679

► Vertebrates with temperature-dependent sex determination (TSD), a mechanism that relies on incubation temperature to irreversibly determine the sex of developing embryos, are threatened by ongoing… (more)

▼ Vertebrates with temperature-dependent sex determination (TSD), a mechanism that relies on incubation temperature to irreversibly determine the sex of developing embryos, are threatened by ongoing changes in climate and local environmental conditions. Previous studies have suggested that behavioral and molecular plasticity in this system may provide opportunities for these species to adapt to these changes. Although decades of research have uncovered key aspects, a complete molecular mechanism of TSD remains elusive. Epigenetic studies have the potential to unlock crucial information previously cryptic in traditional genetic studies. Recent studies have shown that environmental factors and maternal effects can greatly influence an individual’s epigenome, resulting in altered phenotypes. DNA methylation in particular is well known for its dynamic ability to silence genes, and evidence is accumulating for its role in determining sex in TSD systems. This thesis examines the presence and effects of epigenetic variation, specifically DNA methylation, in the context of TSD. Using the painted turtle, Chrysemys picta, as a model for TSD, I leveraged a population of painted turtles at a long-term study site to investigate the relationship between DNA methylation and sex in a TSD system. In Chapter 2, I quantified sex-specific genome-wide DNA methylation and its variation in adult turtles. Although I identified high within-sex variation in both sexes, adult female turtles had approximately 1/2 the amount of DNA methylation across their genome as the average adult male, despite otherwise identical genomic structures. Dispersing knowledge is a critical aspect of scientific research. However, many public communities have less access to this information than others. Thus, many people from such communities pursue alternative career paths. Recruitment of diverse students is a national initiative across STEM fields. This thesis also addresses the issue of underrepresentation of minoritized groups in the sciences. In Chapter 3, I report on leveraging the long-term study site to create an immersive field research program for high school students, called TREE (Turtle Camp Research and Education in Ecology), to expose a diverse set of students to ecology research. I found that students not only improved their knowledge of biology-related topics by participating in this hands-on program, but a majority of the program’s alumni continued to pursue a college degree in a STEM-related field. This successful program demonstrates the importance of outreach, and near-peer mentoring in diversifying the STEM workforce.

Subjects/Keywords: Diversity and Inclusion; DNA methylation; Epigenetics; STEM diversity; Temperature-dependent sex determination; Genetics; Molecular Biology; Science and Mathematics Education

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APA (6^th Edition):

Flores, D. V. (2019). Epigenetic variation in a reptile with temperature-dependent sex determination and inspiring a diverse future for STEM. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/17679

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Flores, Daniela Victoria. “Epigenetic variation in a reptile with temperature-dependent sex determination and inspiring a diverse future for STEM.” 2019. Thesis, Iowa State University. Accessed February 27, 2021. https://lib.dr.iastate.edu/etd/17679.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Flores, Daniela Victoria. “Epigenetic variation in a reptile with temperature-dependent sex determination and inspiring a diverse future for STEM.” 2019. Web. 27 Feb 2021.

Vancouver:

Flores DV. Epigenetic variation in a reptile with temperature-dependent sex determination and inspiring a diverse future for STEM. [Internet] [Thesis]. Iowa State University; 2019. [cited 2021 Feb 27]. Available from: https://lib.dr.iastate.edu/etd/17679.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Flores DV. Epigenetic variation in a reptile with temperature-dependent sex determination and inspiring a diverse future for STEM. [Thesis]. Iowa State University; 2019. Available from: https://lib.dr.iastate.edu/etd/17679

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Urbana-Champaign

3. Amini Behbahani, Amirhossein. Essays in development and urban economics.

Degree: PhD, Economics, 2018, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/101654

► The first chapter is a co-authored paper that analyzes the causal impact of air pollution on the housing market as the result of a dramatic… (more)

▼ The first chapter is a co-authored paper that analyzes the causal impact of air pollution on the housing market as the result of a dramatic exogenous increase in air pollution levels in Tehran in 2010 in the aftermath of sanctions imposed on Iran. The sanctions, intended to pressure Iran to end uranium enrichment activities, targeted gasoline imports into the country. In response, Iran rapidly converted some petrochemical plants into refineries to produce gasoline, which was of much lower quality than imported gasoline. This caused a quick and drastic increase in air pollution levels that varied significantly across individual neighborhoods. Using this natural experiment and unique administrative data on Tehran’s housing market, we find that an increase of approximately 30 parts-per-billion in the outdoor concentrations of nitrogen dioxide leads to a decrease in housing prices of roughly 3 percent to 5.2 percent. We find that lower levels of air pollution are associated with higher price-rent ratios, and higher levels of air pollution raise the odds that owners will rent their property rather than occupy it themselves. Our welfare analysis suggests that the deterioration of air quality in 2010 is associated with a reduction in aggregate housing values of 11 billion to 16 billion in Tehran alone. Also, this paper offers what we believe is the first examination of indirect costs that stem from international sanctions against Iran. In the second chapter, I empirically investigate the effect of genetic diversity on income inequality in a large cross-section of countries. Previous studies demonstrated that ethnic, linguistic and religious fractionalization have significant impact on economic performance measures, but the effect will become weaker or disappear once we control for income per capita or latitude as a measure of geographic variation. Other than that, linguistic, ethnic and religious classifications to some extent suffer from the problem of endogeneity and, at best, they capture part of visible diversity. To address these problems, I construct a cross-country genetic fractionalization measure based on the notion of paternal Y-chromosome DNA haplogroups. The resulting genetic diversity measure, which is rooted in long-term history, is less subject to the problem of endogeneity. In addition, the distances among different populations are accounted for in such fractionalization index. Finally, the empirical results show that a higher level of genetic fractionalization is associated with a higher level of income inequality. Also, this paper discusses the main mechanisms through which the genetic fractionalization measure can affect income inequality by presenting empirical evidence. It is presented that the genetic diversity measure is successful in explaining interpersonal trust as an index for individual cooperation and also tax compliance rates, public good output and even the democracy index as measures for social cooperation. The third chapter is based on another co-authored paper. This paper examines the… Advisors/Committee Members: Esfahani, Hadi Salehi (advisor), Esfahani, Hadi Salehi (Committee Chair), Bernhardt, Dan (committee member), Gahvari, Firouz (committee member), McMillen, Daniel (committee member).

Subjects/Keywords: Air Quality; Housing Market; Nitrogen Dioxide; Sanctions Against Iran; Genetic Diversity; Human Y-chromosome DNA Haplogroup; Income Inequality; Fractionalization; Credit Policy; Small Manufacturing Firms; Size-Dependent Industrial Policy; Iran; Employment; Capital Stock; TFP

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Amini Behbahani, A. (2018). Essays in development and urban economics. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/101654

Chicago Manual of Style (16^th Edition):

Amini Behbahani, Amirhossein. “Essays in development and urban economics.” 2018. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed February 27, 2021. http://hdl.handle.net/2142/101654.

MLA Handbook (7^th Edition):

Amini Behbahani, Amirhossein. “Essays in development and urban economics.” 2018. Web. 27 Feb 2021.

Vancouver:

Amini Behbahani A. Essays in development and urban economics. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2018. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2142/101654.

Council of Science Editors:

Amini Behbahani A. Essays in development and urban economics. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2018. Available from: http://hdl.handle.net/2142/101654

4. Giannoulakis, Ioannis. Ανάλυση και σύγκριση αλγορίθμων ευκαιριακού χρονοπρογραμματισμού σε ασύρματα δίκτυα επικοινωνιών: μεθοδολογίες ανάλυσης και αποτελέσματα συγκριτικής αξιολογήσης.

Degree: 2013, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

URL: http://hdl.handle.net/10442/hedi/38661

►

Wireless communication networks develop rapidly, featuring excessive demand for performance improvements. This thesis studies performance and fairness issues of opportunistic schedulers, widely used in modern… (more)

▼

Wireless communication networks develop rapidly, featuring excessive demand for performance improvements. This thesis studies performance and fairness issues of opportunistic schedulers, widely used in modern wireless standards like HSDPA and HDR. Opportunistic schedulers take into account the condition of the wireless link in order to select a terminal for service during a timeslot, by allocating to it all the available network resources. The main attribute of this type of scheduling is that the average transmission rate does depend on the number of active terminals, in the form of a multiuser diversity gain which acts as a multiplicative factor on the average rate. The above characteristics yield to a State Dependent Processor Sharing (SDPS) model, which in its general form considered here, features separate classes of terminals and a generic form of the state space, as a result of the admission control scheme. From a mathematical point of view, we manage to provide the distribution of the sojourn time for an SDPS system, which is expressed through the exponential of an appropriate M-matrix. The form allows the characterization of the asymptotic decay rate of the sojourn time’s distribution tail and provides easily computable upper and lower bounds. Furthermore, the conducted research studies time-scale separation phenomena, by separating the classes of terminals into a slow and a fast group, according to their average transmission rate. By leveraging on the nearly completely decomposable structure of the full system, we arrive in accurate approximations that offer conceptual and computational simplicity. Additionally, we consider some special important cases of the service rate function and/or the admission control scheme, which allow to determine the effect of the presence of slow class terminals on the performance of the terminals belonging in the fast group of classes. The results and conclusions of the generalized problem have been applied in the practical case of a channel-aware wireless network. A comparison of two basic opportunistic schedulers with respect to performance and fairness issues follows. We result in several conclusions regarding the value and the suitability of each scheduler, the appropriate form of the service pool and the specification of the worst case scenario related to the fast class terminals. Moreover, a new scheduling scheme is proposed, combining the nice properties oh the previous two schedulers. The theoretical findings are compared and verified numerically.

Τα δίκτυα ασύρματων επικοινωνιών γνωρίζουν ιδιαίτερη ανάπτυξη και χαρακτηρίζονται από τη συνεχώς αυξανόμενη ανάγκη για βελτιωμένες επιδόσεις και υψηλούς ρυθμούς μετάδοσης. Η διατριβή ασχολείται με τη μελέτη της επίδοσης σε συστήματα τηλεπικοινωνιών όπως το HSDPA και το HDR που βασίζονται σε αλγορίθμους ευκαιριακού χρονοπρογραμματισμού για την επιλογή του τερματικού που θα εξυπηρετηθεί σε κάθε χρονοσχισμή, λαμβάνοντας υπόψη την κατάσταση της ασύρματης ζεύξης. Βασικό γνώρισμα αυτού του τύπου χρονοπρογραμματισμού αποτελεί το…

Subjects/Keywords: Ευκαιριακός χρονοπρογραμματισμός; Μερισμός εξυπηρετητή με εξάρτηση από την κατάσταση; Κατανομή χρόνου απόκρισης; Διαχωρισμός χρονικής κλίμακας; Κέρδη διαφορισμού πολλαπλών χρηστών; Ασύρματο δίκτυο με παρακολούθηση καναλιού; Αποσύνθεση; Συνάθροιση; Opportunistic scheduling; State-dependent processor sharing; Sojourn time distribution; Time scale separation; Multiuser diversity gains; Channel-aware wireless network; DECOMPOSITION; Aggregation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Giannoulakis, I. (2013). Ανάλυση και σύγκριση αλγορίθμων ευκαιριακού χρονοπρογραμματισμού σε ασύρματα δίκτυα επικοινωνιών: μεθοδολογίες ανάλυσης και αποτελέσματα συγκριτικής αξιολογήσης. (Thesis). National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Retrieved from http://hdl.handle.net/10442/hedi/38661

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Giannoulakis, Ioannis. “Ανάλυση και σύγκριση αλγορίθμων ευκαιριακού χρονοπρογραμματισμού σε ασύρματα δίκτυα επικοινωνιών: μεθοδολογίες ανάλυσης και αποτελέσματα συγκριτικής αξιολογήσης.” 2013. Thesis, National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ). Accessed February 27, 2021. http://hdl.handle.net/10442/hedi/38661.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Giannoulakis, Ioannis. “Ανάλυση και σύγκριση αλγορίθμων ευκαιριακού χρονοπρογραμματισμού σε ασύρματα δίκτυα επικοινωνιών: μεθοδολογίες ανάλυσης και αποτελέσματα συγκριτικής αξιολογήσης.” 2013. Web. 27 Feb 2021.

Vancouver:

Giannoulakis I. Ανάλυση και σύγκριση αλγορίθμων ευκαιριακού χρονοπρογραμματισμού σε ασύρματα δίκτυα επικοινωνιών: μεθοδολογίες ανάλυσης και αποτελέσματα συγκριτικής αξιολογήσης. [Internet] [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2013. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10442/hedi/38661.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Giannoulakis I. Ανάλυση και σύγκριση αλγορίθμων ευκαιριακού χρονοπρογραμματισμού σε ασύρματα δίκτυα επικοινωνιών: μεθοδολογίες ανάλυσης και αποτελέσματα συγκριτικής αξιολογήσης. [Thesis]. National Technical University of Athens (NTUA); Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ); 2013. Available from: http://hdl.handle.net/10442/hedi/38661

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Wright State University

5. Jones, Aaron M. Frequency Diverse Array Receiver Architectures.

Degree: MSEgr, Electrical Engineering, 2011, Wright State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=wright1323888275

► Typical radar systems are limited to energy distribution characteristics that are range independent. However, operators are generally interested in obtaining information at particular ranges… (more)

Subjects/Keywords: Electrical Engineering; radar; frequency diverse array radar; waveform diversity; antenna patterns; range-dependent beamforming; linear arrays; planar arrays; MIMO radar; frequency diversity; autonomous beam scanning; multiple beam radar

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jones, A. M. (2011). Frequency Diverse Array Receiver Architectures. (Masters Thesis). Wright State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=wright1323888275

Chicago Manual of Style (16^th Edition):

Jones, Aaron M. “Frequency Diverse Array Receiver Architectures.” 2011. Masters Thesis, Wright State University. Accessed February 27, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1323888275.

MLA Handbook (7^th Edition):

Jones, Aaron M. “Frequency Diverse Array Receiver Architectures.” 2011. Web. 27 Feb 2021.

Vancouver:

Jones AM. Frequency Diverse Array Receiver Architectures. [Internet] [Masters thesis]. Wright State University; 2011. [cited 2021 Feb 27]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1323888275.

Council of Science Editors:

Jones AM. Frequency Diverse Array Receiver Architectures. [Masters Thesis]. Wright State University; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1323888275

6. Strand, Joel. Avkastning som mål, diversifiering som verktyg för en lönsam styrelse.

Degree: Faculty of Arts and Sciences, 2015, Linköping UniversityLinköping University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119518

► Forskning hävdar att endast ett fåtal av styrelseledamöterna förstår vilka beslut som är värdeskapande för företaget. En av orsakerna är oförmågan att rekrytera rätt… (more)

Subjects/Keywords: board diversity; firm performance; board demography; return on equity; roe; corporate governance; ethnics; gender; independent board of directors; dependent board of directors; styrelse; avkastning på eget kapital; lönsamhet; demografi; diversifiering; etnicitet; kön; erfarenhet; oberoende ledamöter; beroende ledamöter

…performance, diversity + board of directors + firm performance. Sedan har vi utifrån dessa…

1 more image…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Strand, J. (2015). Avkastning som mål, diversifiering som verktyg för en lönsam styrelse. (Thesis). Linköping UniversityLinköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119518

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Strand, Joel. “Avkastning som mål, diversifiering som verktyg för en lönsam styrelse.” 2015. Thesis, Linköping UniversityLinköping University. Accessed February 27, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119518.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Strand, Joel. “Avkastning som mål, diversifiering som verktyg för en lönsam styrelse.” 2015. Web. 27 Feb 2021.

Vancouver:

Strand J. Avkastning som mål, diversifiering som verktyg för en lönsam styrelse. [Internet] [Thesis]. Linköping UniversityLinköping University; 2015. [cited 2021 Feb 27]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119518.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Strand J. Avkastning som mål, diversifiering som verktyg för en lönsam styrelse. [Thesis]. Linköping UniversityLinköping University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119518

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Vienna

7. Klaubauf, Sylvia. The role of fungal nitrogen cycling in soil systems.

Degree: 2008, University of Vienna

URL: http://othes.univie.ac.at/2886/

► Pilze spielen eine zentrale Rolle im Ökosystem Erde. Dennoch ist nach wie vor wenig über die Pilzdiversität in Böden und die spezifischen Funktionen einzelner phylogenetischer… (more)

▼ Pilze spielen eine zentrale Rolle im Ökosystem Erde. Dennoch ist nach wie vor wenig über die Pilzdiversität in Böden und die spezifischen Funktionen einzelner phylogenetischer Gruppen bekannt. Vier verschiedene Ackerböden (Maissau, Niederschleinz, Purkersdorf, Tulln) sowie eine Graslanderde (Riederberg) wurden auf ihre Pilzdiversität untersucht. Hierfür wurden ein Kultivierungsansatz sowie eine direkte molekularbiologische Methode verwendet. Die Pilze wurden aufgrund ihrer DNS-Sequenz der ITS/LSU ribosomalen RNS Genregion identifiziert. Es wurden 61 verschiedene Pilzarten isoliert, die hauptsächlich zum Phylum Ascomycota gehören, darunter zB Fusarium spp., Penicillium spp., Trichoderma spp., sowie bislang unbeschriebene Arten. Im Rahmen des kultivierungsunabhängigen Ansatzes wurde eine Klon-Bibliothek erstellt. Danach wurde eine RFLP-Analyse durchgeführt. Auch hier dominierten Spezies der Ascomycota, die Artenzusammensetzung unterschied sich jedoch erheblich vom Kultivierungsansatz. Vertreter der Basidiomycota traten hierbei öfter und in allen fünf Bibliotheken auf. Die Zusammensetzung der Pilzgemeinschaften wies deutliche Unterschiede innerhalb der einzelnen Klon-Bibliotheken auf. Die Artenzahl (species richness) wurde mit verschiedenen Methoden berechnet. Chao2 zeigte für die untersuchten Böden eine gute Abdeckung der erwarteten Pilz-Artenzahl. Lediglich 8,6% der identifizierten Arten konnten mit beiden Verfahren detektiert werden. Die Mehrzahl der Arten (62,6%) wurde mittels des kultivierungs-unabhängigen Verfahrens ermittelt, während 28,8% ausschließlich mit Hilfe des Kultivierungsansatzes identifiziert wurden. Hierdurch wird deutlich, dass beide Methoden sich vielmehr ergänzen, als überlappen. Die vom Grasland Riederberg entstammende Klon-Bibliothek enthielt die größte Diversität und wies als einzige das neu beschriebene Ascomycota Subphylum Soil Clone Group I (SCGI) auf, was eventuell darauf hindeuten könnte, dass SCGI-Pilze bevorzugt an unberührten Standorten vorkommen. Die Maissau Klon-Bibliothek zeigte den geringsten Artenreichtum und auch andere spezifische Eigenschaften grenzen diesen Standort von den anderen ab. Der zweite Teil dieser Studie befasste sich mit der Erforschung der Rolle von Pilzen in N-Transformationsprozessen. Hierfür wurden die Gene, welche für die pilzliche Nitratreduktase kodieren (niaD) untersucht. Dabei stand die Erstellung eines Sequenz-Sets im Vordergrund, welches partielle niaD Sequenzen von Isolaten sowie unkultivierten Pilzen enthält. Auf Grund dieser Erkenntnis soll es möglich werden, transkriptionelle Aktivitäten von Pilz-Populationen, welche dieses Gen exprimieren, unter verschiedenen Umweltbedingungen zu beobachten. Zusätzlich wurde Fluoreszenz in situ Hybridisierung (FISH) mit dem Modelorganismus Aspergillus nidulans durchgeführt. Im Rahmen eines Vorversuchs wurden die FISH Parameter optimiert und die Detektion der niaD mRNA angestrebt. Unsere viel versprechenden Ergebnisse stellen die Basis für zukünftige Studien dar, welche die Expression der Pilz-Nitratreduktase unter…

Subjects/Keywords: 42.13 Molekularbiologie; 42.30 Mikrobiologie; 42.90 Ökologie: Allgemeines; Pilze / Ökologie / Diversität / Ackerböden / Kultivierungsansatz / kultivierungsunabhängige Methode / DNA Sequenzanalyse / ITS/LSU der rRNA Region / Klon-Bibliothek / RFLP-Analyse / Artenzahl / Stickstoff-Kreislauf / Pilz-Nitratreduktase (niaD) / Fluoreszenz in situ Hybridisierung / Aspergillus nidulans / Stickstoffdünger; fungi / ecology / soil fungal community / Fungal diversity / agricultural soils / culture-dependent / culture-independent approach / DNA sequence analysis of the ITS/LSU of the rRNA region / clone library / RFLP-analysis / Species richness / nitrogen cycle / fungal nitrate reductase genes (niaD) / fluorescence in situ hybridisation / Aspergillus nidulans / nitrogen fertilizer

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Klaubauf, S. (2008). The role of fungal nitrogen cycling in soil systems. (Thesis). University of Vienna. Retrieved from http://othes.univie.ac.at/2886/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Klaubauf, Sylvia. “The role of fungal nitrogen cycling in soil systems.” 2008. Thesis, University of Vienna. Accessed February 27, 2021. http://othes.univie.ac.at/2886/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Klaubauf, Sylvia. “The role of fungal nitrogen cycling in soil systems.” 2008. Web. 27 Feb 2021.

Vancouver:

Klaubauf S. The role of fungal nitrogen cycling in soil systems. [Internet] [Thesis]. University of Vienna; 2008. [cited 2021 Feb 27]. Available from: http://othes.univie.ac.at/2886/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Klaubauf S. The role of fungal nitrogen cycling in soil systems. [Thesis]. University of Vienna; 2008. Available from: http://othes.univie.ac.at/2886/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

8. Taylor, Kendrick C. Application of borehole geophysical methods to shallow groundwater investigations.

Degree: 1987, University of Nevada – Reno

URL: http://hdl.handle.net/11714/1743

► Borehole geophysical methods have been used extensively for petroleum and mineral exploration; but due to differences in environment and survey objective, modifications of both equipment… (more)

Subjects/Keywords: borehole geophysical methods; petroleum exploration; mineral exploration; environment; survey objective; modifications of equipment; modifications of interpretation; shallow groundwater applications; complimentary borehole measurements; formation properties; core; clay; samples; interpretation strategies; unsaturated with clay present; saturated with clay present; saturated without clay present; hydraulically anisotropic environments; porosity; moisture content; hydraulic conductivity; groundwater velocity; cation exchange content; pore fluid conductivity; logging instrumentation measures; wells; logs; vertical averages; depth of wells; length of wells; numerical techniques; formation hydraulic properties; high resolution distribution; contaminate transport models; high resolution description; aquifer variability; dependent diversity; contaminate movement; shear flow; high resolution advective flow field; Mackay Science Project; groundwater – sampling; groundwater flow; hydraulic measurements; hydrogeology

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Taylor, K. C. (1987). Application of borehole geophysical methods to shallow groundwater investigations. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/1743

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Taylor, Kendrick C. “Application of borehole geophysical methods to shallow groundwater investigations.” 1987. Thesis, University of Nevada – Reno. Accessed February 27, 2021. http://hdl.handle.net/11714/1743.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Taylor, Kendrick C. “Application of borehole geophysical methods to shallow groundwater investigations.” 1987. Web. 27 Feb 2021.

Vancouver:

Taylor KC. Application of borehole geophysical methods to shallow groundwater investigations. [Internet] [Thesis]. University of Nevada – Reno; 1987. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/11714/1743.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Taylor KC. Application of borehole geophysical methods to shallow groundwater investigations. [Thesis]. University of Nevada – Reno; 1987. Available from: http://hdl.handle.net/11714/1743

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brigham Young University

9. Hunter, Brandon. Channel Probing for an Indoor Wireless Communications Channel.

Degree: MS, 2003, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1063&context=etd

► The statistics of the amplitude, time and angle of arrival of multipaths in an indoor environment are all necessary components of multipath models used to… (more)

Subjects/Keywords: multipath; multipath propagation; propagation environment; indoor propagation; indoor multipath; indoor multipath propagation; channel probing; channel; probing; indoor wireless communications channel; indoor; wireless communications; indoor wireless communications; wireless; communications; wireless communications channel; MIMO; SISO; multiple input multiple output; single input single output; antenna diversity; antenna; diversity; antenna array; channel modeling; modeling; model; wireless propagation; clustering methods; clustering algorithms; clustering; parameter estimation; parameter; channel matrix; h matrix; ray tracing; point spread function; psf; deconvolution; clean; algorithm; clean algorithm; antenna pattern; network analyzer; temporal pattern; 2.4 ghz system; 6 ghz system; channel capacity; capacity estimate; channel capacity estimate; propagation environment; scattering; transfer matrix; matrix; water filling solution; water filling method; water filling; Saleh; Valenzuela; Saleh and Valenzuela Model; arrival; time of arrival; angle of arrival; direction of arrival; arrival amplitude; arrivals; antenna positioner; data; simulations; measurements; angle of departure; direction of departure; correlation; convolution; errors; error; CFA; CFAD; constant false alarm; constant false alarm detection; signal; signal dependent clutter; clutter; returns; transmitter; transmit; receive; receiver; transmit antenna; receive antenna; spatial correlation; system PSF; system point spread function; mapping; fuzzy c-means clustering; fuzzy clustering; c-means clustering; c-means; fuzzy; k-means; euclidean distance; time; amplitude; delay; performance prediction; performance prediction errors; fuzzy weighted distance method; rectangular method; weighted rectangular method; statistics; statistical; statistical model; Electrical and Computer Engineering

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hunter, B. (2003). Channel Probing for an Indoor Wireless Communications Channel. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1063&context=etd

Chicago Manual of Style (16^th Edition):

Hunter, Brandon. “Channel Probing for an Indoor Wireless Communications Channel.” 2003. Masters Thesis, Brigham Young University. Accessed February 27, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1063&context=etd.

MLA Handbook (7^th Edition):

Hunter, Brandon. “Channel Probing for an Indoor Wireless Communications Channel.” 2003. Web. 27 Feb 2021.

Vancouver:

Hunter B. Channel Probing for an Indoor Wireless Communications Channel. [Internet] [Masters thesis]. Brigham Young University; 2003. [cited 2021 Feb 27]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1063&context=etd.

Council of Science Editors:

Hunter B. Channel Probing for an Indoor Wireless Communications Channel. [Masters Thesis]. Brigham Young University; 2003. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1063&context=etd

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