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The positive role of the ecological community in the genomicrevolution

Description: The exponential increase of genomic and metagenomic data,fueled in part by recent advancements in sequencing technology, aregreatly expanding our understanding of the phylogenetic diversity andmetabolic capacity present in the environment. Two of the centralchallenges that bioinformaticians and ecologists alike must face are thedesign of bioinformatic resources that facilitate the analysis of genomicand metagenomic data in a comparative context and the efficient captureand organization of the plethora of descriptive information required tousefully describe these data sets. In this commentary, we review threeinitiatives presented in the "new frontiers" session of the second SCOPEmeeting on Microbial Environmental Genomics (MicroEnGen-II, Shanghai,June 12-15, 2006). These are (1) the Integrated Microbial GenomesResources (IMG), (2) the Genomic Standards Consortium (GSC), and (3) theNatural Environment Research Council (NERC) Environmental BioinformaticsCentre (NEBC). These integrative bioinformatics and data managementinitiatives underscore the increasingly important role ecologists have toplay in the genomic (metagenomic) revolution.
Date: July 1, 2006
Creator: Field, Dawn; Methe, Barbara; Nelson, Karen & Kyrpides, Nikos
Partner: UNT Libraries Government Documents Department

To Intervene or Not to Intervene: How State Capacity Affects State Intervention and Communal Violence

Description: How does state capacity affect the state's ability to intervene in events of communal violence? Communal violence is conflict that occurs between two non-state groups that share a communal identity. The state controls the monopoly on the use of force, so it should be expected that the state will control these violent events. Research on intervention has shown that a state's military is an important indication of their ability to intervene. The study of other elements of state capacity such as the bureaucracy and political institutions have been largely ignored as factors to explain intervention. This paper builds on these elements of state capacity to argue that intervention can be explained by the state's military, bureaucracy, and the institutions that are in place. This argument has support from an empirical analysis conducted through replication data in Sub-Saharan Africa from 1989 to 2010.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: May 2018
Creator: Wilson, Alexander C
Partner: UNT Libraries

Exploratory Experimentation and Computation

Description: We believe the mathematical research community is facing a great challenge to re-evaluate the role of proof in light of recent developments. On one hand, the growing power of current computer systems, of modern mathematical computing packages, and of the growing capacity to data-mine on the Internet, has provided marvelous resources to the research mathematician. On the other hand, the enormous complexity of many modern capstone results such as the Poincare conjecture, Fermat's last theorem, and the classification of finite simple groups has raised questions as to how we can better ensure the integrity of modern mathematics. Yet as the need and prospects for inductive mathematics blossom, the requirement to ensure the role of proof is properly founded remains undiminished.
Date: February 25, 2010
Creator: Bailey, David H. & Borwein, Jonathan M.
Partner: UNT Libraries Government Documents Department

Effects of Heat-Capacity Lag in Gas Dynamics

Description: Report presenting an investigation of the existence of energy dissipations in gas dynamics, which must be attributed to a lag in the vibrational heat capacity of the gas, and most specifically the flow about a very small impact tube. A new method of measuring the relaxation time of gases is introduced in which the total-head defects observed with a specially shaped impact tube are compared with theoretical considerations.
Date: January 1944
Creator: Kantrowitz, Arthur
Partner: UNT Libraries Government Documents Department

An Experimental Metagenome Data Management and AnalysisSystem

Description: The application of shotgun sequencing to environmental samples has revealed a new universe of microbial community genomes (metagenomes) involving previously uncultured organisms. Metagenome analysis, which is expected to provide a comprehensive picture of the gene functions and metabolic capacity of microbial community, needs to be conducted in the context of a comprehensive data management and analysis system. We present in this paper IMG/M, an experimental metagenome data management and analysis system that is based on the Integrated Microbial Genomes (IMG) system. IMG/M provides tools and viewers for analyzing both metagenomes and isolate genomes individually or in a comparative context.
Date: March 1, 2006
Creator: Markowitz, Victor M.; Korzeniewski, Frank; Palaniappan, Krishna; Szeto, Ernest; Ivanova, Natalia N.; Kyrpides, Nikos C. et al.
Partner: UNT Libraries Government Documents Department

Is 100 Percent Debt Optimal? Three Essays on Aggressive Capital Structure and Myth of Negative Book Equity Firms

Description: This dissertation comprises of three related essays in regard of puzzling negative book equity phenomenon among U.S. public firms. In essay 1, I present the evidence that there is an increasing trend of negative book equity firms over the past 50 years, from 0.3% up to over 5% among publicly traded firms in US. In contrast to previous research which generally classify these firms as distressed firms with highly likelihood of bankruptcy, I propose a new method to separate Healthy Negative Book Equity Firms (HNBEF) from relatively more distressed negative book equity firms. The results show that HNBEF have much higher net income and interest coverage ratio, they survive longer, and pay more dividends. More interestingly, these firms are often actively increase share repurchases and debt issuance. These facts, combined with their strong profitability, indicate that managers of these firms are actively increasing their leverage and choose to be negative book equity firms. To explain the existence of HNBEF, in essay 2, I investigate several possible reasons that may contribute to the extreme leverage of these firms. I find that HNBEF are substantially undervalued by their book assets as stated on the balance sheet. In addition, the value of intangible assets, especially those off-balance sheet intangible assets, is positively related to the probability of becoming HNBEF. Moreover, I find that characteristics of intangible assets and firms also play important role on existence of HNBEF. Specifically, I find that both liquidity and redeployability of intangible assets are positively related with the probability of becoming HNBEF. Also, firms associated with closer borrower-lender relationship are more likely to become HNBEF. To investigate if the aggressive capital structure adopted by HNBEF is optimal, in essay 3, I performed several tests to analyze how these firms differ from other firms in terms of operating performance, ...
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Date: August 2016
Creator: Luo, Haowen
Partner: UNT Libraries

Capacity Value of PV and Wind Generation in the NV Energy System

Description: Calculation of photovoltaic (PV) and wind power capacity values is important for estimating additional load that can be served by new PV or wind installations in the electrical power system. It also is the basis for assigning capacity credit payments in systems with markets. Because of variability in solar and wind resources, PV and wind generation contribute to power system resource adequacy differently from conventional generation. Many different approaches to calculating PV and wind generation capacity values have been used by utilities and transmission operators. Using the NV Energy system as a study case, this report applies peak-period capacity factor (PPCF) and effective load carrying capability (ELCC) methods to calculate capacity values for renewable energy sources. We show the connection between the PPCF and ELCC methods in the process of deriving a simplified approach that approximates the ELCC method. This simplified approach does not require generation fleet data and provides the theoretical basis for a quick check on capacity value results of PV and wind generation. The diminishing return of capacity benefit as renewable generation increases is conveniently explained using the simplified capacity value approach.
Date: September 1, 2012
Creator: Lu, Shuai; Diao, Ruisheng; Samaan, Nader A. & Etingov, Pavel V.
Partner: UNT Libraries Government Documents Department

Third-Party Finance for Commercial Photovoltaic Systems: The Rise of the PPA

Description: Installations of grid-connected photovoltaic (PV) systems in the United States have increased dramatically in recent years, growing from less than 20 MW in 2000 to nearly 500 MW at the end of 2007, a compound average annual growth rate of 59%. Of particular note is the increasing contribution of 'non-residential' grid-connected PV systems--defined here as those systems installed on the customer (rather than utility) side of the meter at commercial, institutional, non-profit, or governmental properties--to the overall growth trend. Although there is some uncertainty in the numbers, non-residential PV capacity grew from less than half of aggregate annual capacity installations in 2000-2002 to nearly two-thirds in 2007. This relative growth trend is expected to have continued through 2008. This article, which is excerpted from a longer report, focuses specifically on just one subset of the non-residential PV market: systems hosted (and perhaps owned) by commercial, tax-paying entities. Tax-exempt entities (e.g., non-profits or municipalities) face unique issues and have different financing options at their disposal; readers interested in PV financing options for tax-exempt entities can find more information in the Bolinger report.
Date: February 15, 2009
Creator: Bolinger, Mark A
Partner: UNT Libraries Government Documents Department

Limnology of Lago Loiza, Puerto Rico

Description: From purpose and study: The principal objectives of this study were as follows: (1) to determine the existing water-quality conditions in Lago Loiza as reflected by the principal chemical, physical, biological and bacteriological characteristics in the lake and its tributaries. (2) To estimate the reservoir's water budget during the study period, including the contributions from the tributaries and other sources. (3) Estimation of the reservoir's overall nitrogen and phosphorus budget, including the principal sources and sinks of these nutrients. (4) Definition of the sedimentation rate in the reservoir.
Date: February 1980
Creator: Quinones-Marquez, Ferdinand
Partner: UNT Libraries Government Documents Department

Heat-capacity lag in turbine-working fluids

Description: Report discusses measurements of the relaxation time of steam and nitrogen due to their importance as turbine-working fluids. Additional calculations regarding different nozzle lengths are included.
Date: May 1944
Creator: Kantrowitz, Arthur & Huber, Paul W.
Partner: UNT Libraries Government Documents Department

The Relationship Between Pace Characteristics of Distance Runs and Criterion Measures of Endurance

Description: The purpose of the study was to examine the relationship between treadmill time, maximal oxygen consumption and pace characteristics of the 1.5 and 3 mile runs and to compare the distances and pace characteristics as predictors of aerobic capacity. Subjects were 70 college aged males, ages 18 to 25, enrolled in jogging and conditioning classes at North Texas State University. Three tests were administered: the 1.5 mile run, the 3 mile run and the Bruce treadmill test. The data were analyzed using correlations and factor analysis. Conclusions of the investigation were (1) the 1.5 and 3 mile runs are valid measures of aerobic capacity, (2) the 3 mile run does not significantly increase the correlation between VO2max and endurance runs and (3) pacing characteristics are evident in the 1.5 and 3 mile runs.
Date: December 1985
Creator: Sanchez, Robert J.
Partner: UNT Libraries

Concentrator and Space Applications of High-Efficiency Solar Cells-Recent Developments

Description: GaInP/GaAs cells invented and developed at NREL have achieved world-record efficiencies. We estimate that their production for space applications has grown to > $100 million/yr. Approximately 300 MW/yr of 1000X terrestrial concentrator cells could be fabricated with the existing manufacturing capacity at a cost of about 21{cents}/Wp. A resurgence of interest in terrestrial PV concentrators, together with the strength of the III-V space-solar-cell industry, indicate that III-V cells are also attractive for terrestrial applications.
Date: October 26, 1998
Creator: Kurtz, S. R. & Friedman, D. J.
Partner: UNT Libraries Government Documents Department

Evaluation of SAES COMBOGETTER(r) for Use in Nuclear Material Transportation Packages

Description: This report summarizes the testing of SAES COMBOGETTER{reg_sign} and evaluates its potential use as a hydrogen getter in nuclear material transportation packages. We measured the getters hydrogen uptake capacity, and uptake rates under different conditions including temperature, gas composition, and poisons. We also compared this getter to another commercially available hydrogen getter.
Date: January 1, 2001
Creator: Buffleben, George M.; Shepodd, Timothy J. & Nigrey, Paul J.
Partner: UNT Libraries Government Documents Department

SunSine{trademark}300: Manufacture of an AC Photovoltaic Module; Final Report Phases I & II; 25 July 1995-30 June 1998

Description: The purpose of this PVMaT subcontract was to establish manufacturing capability and enter commercial production with the SunSine{trademark}300 AC Module. This goal was achieved when production began in September 1997, first units were shipped in December 1997, and the pilot production of 109 units was completed in the spring of 1998. As of the completion of this PVMaT project, production capacity is 2500 units per year, which represents 627.5 kW AC {at} STC. This report provides the background of the development process that led to a commercial version of the SunSine{trademark}300; describes the SunSine{trademark}300 product, including theory of operation; provides a summary of all the significant test methods that were applied to prototypes of the product, with a summary of test results; and ends with a summary of the production process and a list of project sponsors who received units for evaluation.
Date: March 22, 1999
Creator: Kern, G.
Partner: UNT Libraries Government Documents Department

Generalized selection charts for bombers powered by one, two, four, and six 3000-horsepower engines 1: capacity and economy

Description: Supplement using data from a previous report to show the cargo that can be carried at various ranges, pounds of cargo that can be carried per pound of fuel, and other graphs to simplify the problem of determining which cargo can be carried at any range. The assumptions, parameters, and equations from the original report are carried over in the supplement.
Date: August 1942
Creator: Brevoort, Maurice J.; Stickle, George W. & Hill, Paul R.
Partner: UNT Libraries Government Documents Department

Generalized selection charts for bombers powered by two, four, and six 3000-horsepower engines 1: capacity and economy

Description: Supplement using data from a previous report to show the cargo that can be carried at various ranges, pounds of cargo that can be carried per pound of fuel, and other graphs to simplify the problem of determining which cargo can be carried at any range. The assumptions, parameters, and equations from the original report are carried over in the supplement.
Date: January 1943
Creator: Brevoort, Maurice J.; Stickle, George W. & Hill, Paul R.
Partner: UNT Libraries Government Documents Department

Letter Report for Characterization of Biochar

Description: On 27 November 2012, a bulk biochar sample was received for characterization of selected physical and chemical properties. The main purpose of the characterization was to help determine the degree to which biochar would be suitable as a soil amendment to aid in growth of plants. Towards this end, analyses to determine specific surface, pH, cation-exchange capacity, water retention, and wettability (i.e. surface tension) were conducted. A second objective was to determine how uniform these properties were in the sample. Towards this end, the sample was separated into fractions based on initial particle size and on whether the material was from the external surface or the internal portion of the particle. Based on the results, the biochar has significant liming potentials, significant cation-retention capacities, and highly variable plant-available moisture retention properties that, under the most favorable circumstances, could be helpful to plants. As a consequence, it would be quite suitable for addition to acidic soils and should enhance the fertility of those soils.
Date: April 9, 2013
Creator: Amonette, James E.
Partner: UNT Libraries Government Documents Department

A Course in Freshman English Composition Based on Theories of Creativity

Description: Today's colleges and universities are faced with the challenges of reforming their curriculums in an effort to hold a generation of students who are now demanding more than just a degree. Today prominent writers in the field of higher education point to the necessity of assessing and reconstructing college courses so that new direction will be provided. Each student entering college for the first time usually must enroll in an English composition course. Such a course offers great potential to encourage the creative capacity of the incoming student and foster an attitude of personal inquiry. The diversity of subjects and intentions which can be introduced in the beginning composition course offers a healthy reservoir of opportunity for exploring personal meaning. Introducing some of the goals and concepts of creativity may thus inspire the design of a new course given to meeting the challenges of higher education.The problem of this study was to develop a course in freshman English composition based on the theories of creativity and directed towards the development of the student's creative and critical capacity.
Date: August 1969
Creator: Garrett, Patrick Posey
Partner: UNT Libraries

Creating Value by Enhancing Innovative Capability: the Role of Absorptive Capacity and Institutional Framework

Description: Innovations as a source of economic wellbeing and social prosperity has been well researched, albeit primarily done in the context of developed economies. However, of late, interest in the effect of innovation on economic performance and quality of life has been renewed as the world observes the rise of emerging economies, and at the same time, the prolonged recession in the more developed economies (i.e. North America and European countries). There has been a marked increase in the quantity and quality of research and development, spawn by innovative companies from emerging economies that are making their mark in global marketplace. These phenomena challenge the traditional concept that innovation flows from the resource rich developed countries to less developed countries, and that the latter are at a disadvantage in terms of knowledge, technology and competitiveness. Existing studies on national innovation highlight the relationships between innovative capability and its outcomes; however, few have tried to explain the determinants of a nation’s innovative capabilities. Using a sample of 95 countries and panel data analysis covering 28 years of observation, this study attempts to model the determinants of innovative capability at national level, and focuses on absorptive capacity and institutional framework as the main determinants of innovative capability. Further, this study identifies different aspects of absorptive capacity: creation and exploitation of innovation. Findings offer support on the importance of various sources of external knowledge in the creation of innovation, with FDI inflow and High Technology Export as the strongest sources. Corruption as institutional factor has negative effect on innovative capability, whereas openness shows no effect. National absorptive capacity moderates the effect of external knowledge on innovative capability, except on FDI outflow in which a negative effect on trademark application as a measure of innovative capability. The findings suggest that innovative capability and moderating role ...
Date: August 2014
Creator: Suryandari, Retno Tanding
Partner: UNT Libraries