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Cover And Contents

Turkish Journal of Electrical Engineering and Computer Sciences

No abstract provided.

State Of The Art For Differential Circuits In Wireless Transceivers: A New Wideband Active Balun In Sige Bicmos Technology, Balwant Godara, Alain Fabre

Turkish Journal of Electrical Engineering and Computer Sciences

The aim of this paper is 3-fold: firstly, to provide a comprehensive overview of the use of differential circuits for analogue signal processing in wireless transceivers; secondly, to describe, in detail, single-ended signal to differential conversion, and the corresponding theory of such devices, their characterisation, various methods of implementation, and comparative analyses of their performance; lastly, to propose a new transistor-based solution for wideband baluns. This novel solution is based on the current conveyor and has been modelled using the transistor parameters of a 0.35 \mu m SiGe BiCMOS technology. The salient features of the new implementation are: (a) stable …

Digital Fractional Frequency Synthesizer Based On Counters, Milan Stork

Turkish Journal of Electrical Engineering and Computer Sciences

This paper describes the architecture of a new pure digital frequency synthesizer based on pulse generators, counters and a register. The technique described here is much simpler than other methods. The synthesizer presented is suitable for the design of VLSI architectures or for programmable large-scale integration circuits.

Statistical Model Of Hot-Carrier Degradation And Lifetime Prediction For P-Mos Transistors, Firat Kaçar, Ayten Kuntman, Hakan Kuntman

Turkish Journal of Electrical Engineering and Computer Sciences

Along with advances in microelectronics, and computer and space technologies, device dimensions are becoming smaller; as a result, hot-carrier effect, lifetime prediction, and reliability become more important concepts for MOS transistors. In this paper, the degradation in the drain current and threshold voltage of P-MOS transistors are observed by operating the devices under voltage stress conditions. Using the observation results, the effect of hot-carriers was investigated statistically and a new statistical method for modeling was proposed as an alternative to those given in the literature. The linear regression method is used to estimate the power, Weibull, and logarithmic parameters, and …

The Effect Of Collector Doping On Inp-Based Double Heterojunction Bipolar Transistors, Serkan Topaloğlu, Jörn Driesen, Werner Prost, Franz Josef Tegude

Turkish Journal of Electrical Engineering and Computer Sciences

High current effects on double heterojunction bipolar transistor (DHBT) performance were investigated. Three DHBTs with different collector doping densities were grown and processed. DC and RF measurements were performed to evaluate the influence of collector doping and the related Kirk effect on HBT performance. In addition to these samples, the Kirk effect was proven on SHBTs and the delay of this effect on submicron HBTs was investigated.

An Adaptive Feedforward Amplifier Application For 5.8 Ghz, Engi̇n Kurt, Osman Palamutçuoğullari

Turkish Journal of Electrical Engineering and Computer Sciences

In this study, a 5.8 GHz power amplifier is linearized by an adaptive feedforward technique. A DSP-based control scheme is applied to reduce the intermodulation distortion of this amplifier. A two-tone test is used to verify the design.

Artificial Neural Design Of Microstrip Antennas, Nurhan Türker, Fi̇li̇z Güneş, Tülay Yildirim

Turkish Journal of Electrical Engineering and Computer Sciences

A general design procedure is suggested for microstrip antennas using artificial neural networks and this is demonstrated using rectangular patch geometry. In this design procedure, synthesis is defined as the forward side and then analysis as the reverse side of the problem. Worked examples are given using the most efficient materials.

Wind Power, Distributed Generation: New Challenges, New Solutions, Vladimiro Miranda

Turkish Journal of Electrical Engineering and Computer Sciences

This paper discusses some issues related with the growing importance of wind power and in modern power systems and some challenges raised by the emergence of distributed generation, and how computational intelligence and other modern techniques have been able to provide valuable results in solving the new problems. It presents some solutions obtained with a number of computational intelligence techniques and their application to real cases.

Controlling Rail Potential Of Dc Supplied Rail Traction Systems, Mehmet Turan Söylemez, Süleyman Açikbaş, Adnan Kaypmaz

Turkish Journal of Electrical Engineering and Computer Sciences

Most modern DC electrified mass transit systems use a totally floating earth as their grounding strategy. A well-known problem related with totally floating systems is that the touch potentials can be dangerously high. In order to reduce the voltages on rails, several devices exist. Most of these devices allow a direct connection to earth when a certain voltage threshold is exceeded. In this paper, the working principles of these devices are given and the effect of certain parameters related with these devices on the minimum achievable touch potentials is investigated.

Cover And Contents

Turkish Journal of Electrical Engineering and Computer Sciences

No abstract provided.

Town Of Milton, New Hampshire 2005 Annual Report., Milton Town Representatives

Milton, NH Annual Reports

This is an annual report containing vital statistics for a town/city in the state of New Hampshire.

The Patent Cooperation Treaty: At The Center Of The International Patent System, Jay Erstling

Faculty Scholarship

In view of the fact that the PCT is composed of almost 130 countries and that more than 100 national and regional patent offices, as well as WIPO itself, perform PCT functions, it is remarkable that the system operates so smoothly and continues to gain momentum. Perhaps the system’s greatest strength comes from the immense diversity of legal, linguistic, and national cultures that constitute the PCT. While the system has served to harmonize divergent practices, it has also been obliged to accommodate to the sometimes inflexible peculiarities of national law and procedure. The PCT’s ability to strike a balance between …

University Of Northern Iowa Fact Book, 2006-2007, University Of Northern Iowa

University of Northern Iowa Fact Book

Contents:

Quick Reference ... Inside front cover
Mission Statement ... 1
UNI Organizational Chart ... 2
UNI Administration ... 3
Definitions of Terms Used ... 4
New Students ... 7
Enrollment ... 19
Alumni ... 63
Faculty and Staff ... 71
Library ... 85
Budget and Finance ... 87
Academic Departments ... 99
Miscellaneous ... 113

Planar Hall-Effect Magnetic Random Access Memory, Y. Bason, L. Klein, J.-B. Yau, X. Hong, J. Hoffman, C. H. Ahn

Xia Hong Publications

We suggest a type of magnetic random access memory (MRAM) that is based on the phenomenon of the planar Hall effect (PHE) in magnetic films, and we demonstrate this idea with manganite films. The PHE-MRAM is structurally simpler than the currently developed MRAM that is based on magnetoresistance tunnel junctions, with the tunnel junction structure being replaced by a single-layer film.

Cluster-Assembled Nanocomposites, Yinfan Xu, M.L. Yan, David J. Sellmyer

David Sellmyer Publications

This chapter focuses on a gas-aggregation technique to prepare magnetic nanoclusters with controllable cluster sizes and size distributions. The review includes current research on nanoclusters, such as uncoated and oxide-coated Fe, Co and Fe clusters and clusters made from alloys, but special emphasis is on highly anisotropic L1₀-ordered FePt clusters, which are of potential interest for magnetic recording with ultrahigh areal densities of more than 1 Tera bit/in². In particular, we discuss magnetic and structural properties of FePt nanoclusters and thin films. Another approach discussed in the chapter is to create cluster nanocomposites by multilayering …

Strong Convergence Bounds Of The Hill-Type Estimator Under Second-Order Regularly Varying Conditions, Zuoxiang Peng, Saralees Nadarajah

Department of Mathematics: Faculty Publications

Bounds on strong convergences of the Hill-type estimator are established under second order regularly varying conditions

Delay Dynamic Equations With Stability, Douglas R. Anderson, Robert J. Krueger, Allan C. Peterson

Department of Mathematics: Faculty Publications

We first give conditions which guarantee that every solution of a first order linear delay dynamic equation for isolated time scales vanishes at infinity. Several interesting examples are given. In the last half of the paper, we give conditions under which the trivial solution of a nonlinear delay dynamic equation is asymptotically stable, for arbitrary time scales.

Nebraska Cooperative Fish And Wildlife Research Unit: Report Of Activities July 2004 – October 2006

Nebraska Cooperative Fish and Wildlife Research Unit: Annual Reports

Contents
Personnel and Cooperators . 1
Coordinating Committee Members. 1
Nebraska Cooperative Fish and Wildlife Research Unit Staff . 1
University of Nebraska–Lincoln Faculty Cooperators. 2
Nebraska Game and Parks Commission Cooperators. 2
Federal Agency Cooperators . 2
State Agency Cooperators . 2
Private Sector Cooperators . 3
Other Faculty Cooperators . 3
Graduate Degree Candidates . 3
Post-Doctoral Research Associates . 4
Research Technicians. 4
Federal Work-Study Students . 4
Other Cooperative Unit Staff . 4
Projects in Fisheries Science. 5
Projects in Wildlife Science. 11
Teaching . 23
Training and Workshops . 25
Professional Activities. 27
Peer-Reviewed Publications …

Multiple Hypotheses Testing Of Fish Incidence Patterns In An Urbanized Ecosystem, Christopher J. Chizinski, C.L. Higgins, C.E. Shavlik, Kevin L. Pope

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Ecological and evolutionary theories have focused traditionally on natural processes with little attempt to incorporate anthropogenic influences despite the fact that humans are such an integral part of virtually all ecosystems. A series of alternate models that incorporated anthropogenic factors and traditional ecological mechanisms of invasion to account for fish incidence patterns in urban lakes was tested. The models were based on fish biology, human intervention, and habitat characteristics. However, the only models to account for empirical patterns were those that included fish invasiveness, which incorporated speciesspecific information about overall tolerance and fecundity. This suggests that species-specific characteristics are more …

Temperature-Caused Fish Kill In A Flowing Great Plains River, Bart W. Durham, Gene R. Wilde, Kevin L. Pope

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

On 9 July 2002, while sampling a flowing segment of the North Fork Ninnescah River 10 km upstream from Cheney Reservoir, Reno County, Kansas, we observed and collected dead and dying specimens of 5 fish species. We attribute the fish kill to high water temperature, which reached 38.0°C on this day.

A Framework For Spatial Risk Assessments: Potential Impacts Of Nonindigenous Invasive Species On Native Species, Craig R. Allen, Alan R, Johnson, Leslie Parris

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Many populations of wild animals and plants are declining and face increasing threats from habitat fragmentation and loss as well as exposure to stressors ranging from toxicants to diseases to invasive nonindigenous species. We describe and demonstrate a spatially explicit ecological risk assessment that allows for the incorporation of a broad array of information that may influence the distribution of an invasive species, toxicants, or other stressors, and the incorporation of landscape variables that may influence the spread of a species or substances. The first step in our analyses is to develop species models and quantify spatial overlap between stressor …

Multimodel Inference And The Understanding Of Complexity, Discontinuity, And Normadism, Craig R. Allen, Denis A. Saunders

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Nomadism has received surprisingly little attention in the ecological literature, and further work in this area is needed. The results of Woinarski’s reanalysis of our research findings are broadly similar to our own, and they support our original interpretation. However, his presentation is confusing and difficult to interpret.We used an information-theoretic approach to multimodel selection. We a priori defined plausible candidate models relating the variables described in our original paper or Woinarski’s reanalysis to the phenomenon of nomadism. We tested models that investigate nomadism as a function of nectivory, granivory, diet diversity, mixed diet, distance to body mass aggregation edge, …

Firm Size Diversity, Functional Richness, And Resilience, Ahjond S. Garmestani, Craig R. Allen, John D. Mittelstaedt, Craig A. Stow, William A. Ward

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

This paper applies recent advances in ecology to our understanding of firm development, sustainability, and economic development. The ecological literature indicates that the greater the functional richness of species in a system, the greater its resilience – that is, its ability to persist in the face of substantial changes in the environment. This paper focuses on the effects of functional richness across firm size on the ability of industries to survive in the face of economic change. Our results indicate that industries with a richness of industrial functions are more resilient to employment volatility.

Parent Birds Assess Nest Predation Risk And Adjust Their Reproductive Strategies, J. J. Fontaine, T. E. Martin

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Avian life history theory has long assumed that nest predation plays a minor role in shaping reproductive strategies. Yet, this assumption remains conspicuously untested by broad experiments that alter environmental risk of nest predation, despite the fact that nest predation is a major source of reproductive failure. Here, we examined whether parents can assess experimentally reduced nest predation risk and alter their reproductive strategies. We experimentally reduced nest predation risk and show that in safer environments parents increased investment in young through increased egg size, clutch mass, and the rate they fed nestlings. Parents also increased investment in female condition …

Habitat Selection Responses Of Parents To Offspring Predation Risk: An Experimental Test, J. J. Fontaine, T. E. Martin

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

The ability of nest predation to influence habitat settlement decisions in birds is widely debated, despite its importance in limiting fitness. Here, we experimentally manipulated nest predation risk across a landscape and asked the question, do migratory birds assess and respond to variation in nest predation risk when choosing breeding habitats? We examined habitat preference by quantifying the density and settlement date of eight species of migratory passerines breeding in areas with and without intact nest predator communities. We found consistently more individuals nesting in areas with reduced nest predation than in areas with intact predator assemblages, although predation risk …

Draft Environmental Assessment For Listing Silver Carp (Hypophthalmichthys Molitrix) As Injurious Wildlife Under The Lacey Act

National Invasive Species Council

In this environmental assessment, we consider two alternatives for the proposed action to add silver carp (Hypophthalmichthys molitrix) to the list of injurious wildlife under the Lacey Act: 1) no action; and 2) adding all forms (diploid and triploid) of live silver carp, gametes, eggs and hybrids. Three alternatives considered, but dismissed from further analysis were 1) adding all forms of live and dead silver carp, gametes, eggs and hybrids; and 2) adding only diploid (fertile) forms of live silver carp, gametes, eggs and hybrids; and 3) require double-escape proof aquaculture ponds, transport vehicles and containers for typical …

Overview Of Nisc & Isac

National Invasive Species Council

Executive Order (EO) 13112

ISAC

Federal Advisory Committee Act

ISAC Charter

ISAC Subcommittees

Membership of ISAC

Evaluation Of Fraction Of Absorbed Photosynthetically Active Radiation Products For Different Canopy Radiation Transfer Regimes: Methodology And Results Using Joint Research Center Products Derived From Seawifs Against Ground-Based Estimations, Nadine Gobron, Bernard Pinty, Ophélie Aussedat, Jing-M Chen, Warren B. Cohen, Rasmus Fensholt, Valery Gond, Karl Fred Huemmrich, Thomas Lavergne, Frédéric Mélin, Jeffrey L. Privette, Inge Sandholt, Malcolm Taberner, David P. Turner, Michel M. Verstraete, Jean-Luc Widlowski

United States National Aeronautics and Space Administration: Publications

This paper discusses the quality and the accuracy of the Joint Research Center (JRC) fraction of absorbed photosynthetically active radiation (FAPAR) products generated from an analysis of Sea-viewing Wide Field-of-view Sensor (SeaWiFS) data. The FAPAR value acts as an indicator of the presence and state of the vegetation and it can be estimated from remote sensing measurements using a physically based approach.

Problem Solving In The Fourth Grade Classroom, Lisa Lefevre

Senior Honors Theses and Projects

No abstract provided.

Complexity Trends In The Evolutionary History Of Dasycladalean Algae, Michael Stearns

Senior Honors Theses and Projects

Dasycladalean algae are a group of marine algae that have an excellent fossil record extending back more than 500 million years. In our study, we investigated morphological complexity over the evolutionary history of this group. To determine complexity for each of more than 400 species, we assigned numerical values for six morphological features; the sum for each species forms a quantitative expression of complexity. We found that although maximum complexity increased over time, forms with minimum complexity persisted during most of the evolutionary history of the group.