Digital Commons Network^™

Papr Reduction Using Artificial Bee Colony Algorithm In Ofdm Systems, Necmi̇ Taşpinar, Dervi̇ş Karaboğa, Mahmut Yildirim, Bahri̇ye Akay

Turkish Journal of Electrical Engineering and Computer Sciences

Partial transmit sequence (PTS) is an attractive scheme for peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems, but its high computational complexity to find optimum phase factors is the main drawback. In this paper, we propose PTS based on an artificial bee colony (ABC) algorithm (ABC-PTS) for reducing the computational complexity of the PTS in the OFDM system. The ABC-PTS was compared to conventional PTS using a random search strategy (RS-PTS) and optimum PTS. In addition, the bit error rate (BER) performance of the ABC-PTS was shown when a high power amplifier (HPA) was used for …

Stray Magnetic Field Distributed Around A Pmsm, Ali̇ Ahmed Adam, Kayhan Gülez, Seli̇m Köroğlu

Turkish Journal of Electrical Engineering and Computer Sciences

In this work, the low frequency electromagnetic emission from permanent magnet synchronous motors is studied. The main objective is to provide a safety region for humans in the vicinity of these motors, especially as these motors are now being used widely in inhabited areas, where high flux densities are expected. In this study, a new proposed equivalent magnetic circuit is used to estimate the stray fields at the surface of the motor. The analysis showed that the emission of the stray field in the radial direction depends on the permeability of the stator body. Low values of permeability may result …

New Srco With Explicit Current-Mode Output Using Two Ccs And Grounded Capacitors, D R. Bhaskar, Kasim K. Abdalla, Raj Senani

Turkish Journal of Electrical Engineering and Computer Sciences

A new Grounded-Capacitor Single Resistance Controlled Sinusoidal Oscillator (SRCO) with explicit current output using two Current Conveyors (CCs) and five passive elements is presented. The proposed circuit offers (i) independent control of condition of oscillation and frequency of oscillation, (ii) low active and passive sensitivities, (iii) use of both the grounded capacitors (suitable for IC implementation) and (iv) reasonably good frequency stability. The workability of the proposed configuration has been confirmed by the PSPICE simulations.

Imitation Of Basic Hand Preshapes By Fluid Based Method: Fluidics Formation Control, Umut Ti̇lki̇, İsmet Erkmen, Aydan Müşerref Erkmen

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, a new approach is developed, avoiding the correspondence problem caused by the difference in embodiment between imitator and demonstrator in imitation learning. In our work, the imitator is a fluidic system of dynamics totally different than the imitatee, which is a human performing hand gestures. The fluidic system is composed of fluid particles, which are used for the discretization of the problem domain. In this work, we demonstrate the fluidics formation control so as to imitate by observation basic hand preshaping features. Our fluidic formation control is based on setting suitable parameters of Smoothed Particle Hydrodynamics (SPH), …

Four Quadrant Fgmos Analog Multiplier, Si̇nem Keleş, Hulusi̇ Hakan Kuntman

Turkish Journal of Electrical Engineering and Computer Sciences

A novel four-quadrant analog multiplier using floating gate MOS (FGMOS) transistors operating in the saturation region is presented. The drain current is proportional to the square of the weighted sum of the input signals. This square law characteristic of the FGMOS transistor is used to implement the quarter square identity by utilizing only six FGMOS transistors. The main features of this remarkably simple multiplier circuit configuration are the large input signal range equal to 100% of the supply voltage, nonlinearity of 0.0081%, bandwidth of 1.4--1.5 Ghz and THD of maximum 2.67% (while the inputs are at their maximum values).

Recent Advances In The Synthetic And Mechanistic Aspects Of The Ruthenium-Catalyzed Carbon-Heteroatom Bond Forming Reactions Of Alkenes And Alkynes, Chae S. Yi

Chemistry Faculty Research and Publications

The group’s recent advances in catalytic carbon-to-heteroatom bond forming reactions of alkenes and alkynes are described. For the C–O bond formation reaction, a well-defined bifunctional ruthenium-amido catalyst has been successfully employed for the conjugate addition of alcohols to acrylic compounds. The ruthenium-hydride complex (PCy₃)₂(CO)RuHCl was found to be a highly effective catalyst for the regioselective alkyne-to-carboxylic acid coupling reaction in yielding synthetically useful enol ester products. Cationic ruthenium-hydride catalyst generated in-situ from (PCy₃)₂(CO)RuHCl/HBF₄·OEt₂ was successfully utilized for both the hydroamination and related C–N bond forming reactions of alkenes. For …

The Categories Of Graphs, Demitri Joel Plessas

Graduate Student Theses, Dissertations, & Professional Papers

In traditional studies of graph theory, the graphs allow only one edge to be incident to any two vertices, not necessarily distinct, and the graph morphisms must map edges to edges and vertices to vertices while preserving incidence. We refer to these restricted morphisms as strict morphisms. We relax the conditions on the graphs by allowing any number of edges to be incident to any two vertices, as well as relaxing the condition on graph morphisms by allowing edges to be mapped to vertices, provided that incidence is still preserved. We call the broader category of these graphs and …

Unearthing The Inner Compass, Kimberly Ann Kapalka

Graduate Student Theses, Dissertations, & Professional Papers

The process of composing a body of artwork was to prove my artistic ability and prepare work for submission to artist-in-residence programs. To achieve this goal, I committed eleven months to this project. Inspiration for pieces came from my travels, interests in American Indian culture, wildlife, trees, photographs, and still-life objects. I devoted as much time as possible in my make-shift apartment studio working on art. Balancing career and home activities was a habitual challenge. I learned to trust my intuition while creating art making choices that reflected my intended message. Fear of public opinion floated through my mind as …

The Impact Of Nclb Reforms In The Elementary Schools Comparing Perceptions/Practices From 2002 To 2011, Judith L. Gosnell-Lamb

Graduate Student Theses, Dissertations, & Professional Papers

With the advent of No Child Left behind in 2002, public education in the United States entered into a reform movement with mounting consequences and ramifications. This unprecedented federal in-road into public education became the umbrella regulator over programs, staff, budgets and students. The purpose of this quantitative study was to determine to what extent NCLB had impacted educational leadership and classroom practices as educators have strived to serve their students and the federal mandates at the same time.

A request for participants went out over the internet to over 1000 elementary principals. Asking if they had been in the …

The Statistical Relationship Among Number Sense, Computational Fluency, And Montana Comprehensive Assessment System, Amy Jo Burland

Graduate Student Theses, Dissertations, & Professional Papers

According to recent studies, less than half of U.S. students perform at the proficient or advanced levels in mathematics by the time they reach grade 4 and the trend continues through high school. In order to improve instruction many districts have adopted scientifically based researched programs such as Response to Intervention (RTI), which allows for the examination of the effectiveness of the core curriculum that is being used in a school or classroom. In addition, RTI provides school administrators and teachers with educational tools to identify students who may be at-risk of failing and to inform teachers of supplemental instruction …

Debt Structure In The West: Money And Gift, And The Influence On Community, James A. Becker

Graduate Student Theses, Dissertations, & Professional Papers

Debt structures all relationships in America as well as all of our economic material exchanges. Historically debt has always been seen thus with our religious texts being written both in the terminology of the metaphysical and the economical combining them together in an attempt to understand the social and economic systems that individuals live in. At the core of the social and economic systems is community. In America the myth of the gift is a dominant catalyst that uses debt to make community through time. In order to study the structure of debt within America I will be using an …

Informal Mathematics Activities And The Beliefs Of Elementary Teacher Candidates, Matt B. Roscoe

Graduate Student Theses, Dissertations, & Professional Papers

This study sought to determine the relationship between participation in informal mathematics activities and the formal-to-informal beliefs of university teacher candidates in elementary education. Three classes of preservice teachers participated in the study through their enrollment in a content mathematics course for elementary education majors. Four informal mathematics activities were employed as part of the course requirements. Pre and post formal-to-informal beliefs about mathematics and mathematics instruction were measured using a Likert-scale beliefs assessment instrument used by Collier (1972) and Seaman et al. (2005). Changes in beliefs about mathematics and mathematics instruction were compared to a control group. Student reflection …

Hostis Antiquus Resurgent: A Reconfigured Jerusalem In Twelfth-Century Latin Sermons About Islam, Todd P. Upton

Quidditas

This paper investigates how Christian writers from late antiquity through the twelfth century transformed explanations of encounters with Middle Eastern peoples and lands into a complex theological discourse. Examinations of sermons and narrative sources from antiquity through the first century of Crusades (1096-1192) serve as evidentiary bases because of the polemical way in which Pope Urban II’s 1095 sermon at Clermont defined Muslims. In that sermon, chroniclers recorded that the pope rallied Frankish support for an armed pilgrimage by disparaging Muslims who had overrun Jerusalem and the Holy Sites – calling them a “race utterly alienated from God” (gens …

The Effect Of Optional Summer Transition To High School Program Participation And Required School Year Long Placement On A Core Content Team On Ninth-Grade Students At-Risk Measured Achievement, Engagement, And Behavior Outcomes, Frances K. Pokorski

Student Work

No significant difference in beginning ninth-grade pretest compared to ending ninth-grade posttest comparisons of American History t (17) = 0.34, p = .37 (one-tailed), d = 0.09, English t (17) = 1.40, p = .09 (one-tailed), d = 0.34, and Biology (t (17) = -1.58, p = .07 (one-tailed), d = -0.22, course grade scores were observed for students at-risk who accepted optional summer transition to high school program participation and completed the required school year long placement on a core content team. Students at-risk who refused optional summer transition to high school program participation but completed the required …

Algebra Readiness Outcomes Of Sixth-Grade Boys And Girls Placed In Challenge Math Based On Measured Math Ability Compared To Sixth-Grade Boys And Girls Placed In Challenge Math Based On Teachers' Recommendations, David C. Hemphill

Student Work

The first pretest-posttest hypothesis was tested using the dependent t test. Null hypotheses for test score improvement over time were rejected for the end of fifth-grade pretest compared to ending sixth-grade posttest math Essential Learner Outcome scores converted to standard scores for randomly selected sixth-grade girls meeting measured test score criteria for challenge math placement ( n = 15): pretest M = 120.07, SD = 4.32; posttest M = 121.87, SD = 2.17; t (14) = 1.73, p = .05 (one-tailed), d = 0.500 and rejected for randomly selected sixth-grade girls not meeting measured test score criteria for challenge math …

Growth Of Lactobacillus Paracasei Atcc 334 In A Cheese Model System: A Biochemical Approach, M. Budinich, I. Diaz-Muniz, H. Cai, S. A. Rankin, Jeff Broadbent, J. L. Steele

Nutrition, Dietetics, and Food Sciences Faculty Publications

Growth of Lactobacillus paracasei ATCC 334, in a cheese-ripening model system based upon a medium prepared from ripening Cheddar cheese extract (CCE) was evaluated. Lactobacillus paracasei ATCC 334 grows in CCE made from cheese ripened for 2 (2mCCE), 6 (6mCCE), and 8 (8mCCE) mo, to final cell densities of 5.9 × 108, 1.2 × 108, and 2.1 × 107 cfu/mL, respectively. Biochemical analysis and mass balance equations were used to determine substrate consumption patterns and products formed in 2mCCE. The products formed included formate, acetate, and d-lactate. These data allowed us to identify the pathways likely used and to initiate …

Genetic Diversity In Proteolytic Enzymes And Amino Acid Metabolism Among Lactobacillushelveticus Strains, Jeff Broadbent, H. Cai, R. L. Larsen, J. E. Hughes, D. L. Welker, V. G. De Carvalho, T. A. Tompkins, Y. Ardo, F. Vogensen, A. Delorentiis, M. Gatti, E. Neviani, J. L. Steele

Nutrition, Dietetics, and Food Sciences Faculty Publications

Lactobacillus helveticus CNRZ 32 is recognized for its ability to decrease bitterness and accelerate flavor development in cheese, and has also been shown to release bioactive peptides in milk. Similar capabilities have been documented in other strains of Lb. helveticus, but the ability of different strains to affect these characteristics can vary widely. Because these attributes are associated with enzymes involved in proteolysis or AA catabolism, we performed comparative genome hybridizations to a CNRZ 32 microarray to explore the distribution of genes encoding such enzymes across a bank of 38 Lb. helveticus strains, including 2 archival samples of CNRZ 32. …

Antiaromatic Dianions: Dianions Of Dixanthylidene By Reduction And Attempted Excited-State Deprotonation, Mary Black, Clifford Woodford, Nancy S. Mills

Chemistry Faculty Research

Reduction of dixanthylidene with potassium or lithium resulted in formation of the antiaromatic dianion in high yield. Attempts to form the dianion by excited-state deprotonation of dixanthene with n-butyllithium/TMEDA resulted in formation of the tetraanion from deprotonation ortho to the oxygen. Orientation of the sp3 hydrogens presumably allows preferential deprotonation of the xanthene rings.

Access To Nmr Spectroscopy For Two-Year College Students: The Nmr Site At Trinity University, Nancy S. Mills, M. Shanklin

Chemistry Faculty Research

Students at two-year colleges and small four-year colleges have often obtained their exposure to NMR spectroscopy through "canned" spectra because the cost of an NMR spectrometer, particularly a high-field spectrometer, is prohibitive in these environments. This article describes the design of a NMR site at Trinity University in which spectral data from student samples from community colleges and several four-year colleges are obtained on a 300 MHz NMR spectrometer. The unprocessed free induction decay (FID) is distributed to the students via the Internet and then processed by the students at their local institutions. The success of the NMR site at …

Full Issue

Religion in the Age of Enlightenment

No abstract provided.

Cfd Analysis Of Combustion Instability For A Rocket Injector, Douglass W. Casey

Theses

No abstract provided.

The Feasibility Of A Surface-Based Neutron Spectrometer For Detecting Water On The Moon, Andre Souza

Theses

No abstract provided.

Sentential Access Control, Curt Lawson

Theses

No abstract provided.

Heuristics Modeling Optimization-Oriented Element Behaviors In Discrete, Repulsive Systems, David Barber

Theses

No abstract provided.

[Pi]-[Pi] Molecular Interactions Between Intercalating Antitumor Agents And Caffeine, Gabrielle Hill

Theses

No abstract provided.

The Impact Of Irrigation On Nutrient Export From Agricultural Fields, Walter Lee Ellenburg Ii

Theses

No abstract provided.

Wave-Induced Sediment Transport: Simulation Of Turbulent Wave Boundary Layers, Jeffrey C. Harris

Open Access Dissertations

Two manuscripts are presented which develop a numerical method for studying boundary layer flow and sediment transport on the seafloor. Inviscid flow, either through an analytic solution or a numerical wavetank (NWT) is used to force a previously developed three-dimensional Navier-Stokes model. The resulting hybrid model is able to simulate complex turbulent flows near the ocean bottom or around obstacles.

The first manuscript reports on developments of a perturbation approach to large-eddy simulations (LES) of wave-induced boundary layers. In the present formulation, the total velocity and pressure fields are expressed as the sum of irrotational and near-field viscous perturbation, where …

Essential Elements Of Effective Practices For English Learners, Karen Cadiero Kaplan, Ph.D., Magaly Lavadenz, Ph.D., Elvira G. Armas, Ed.D.

Education and Policy Briefs

One of the most powerful variables for English Learner success is the quality of their teachers. This policy brief published by Californians Together (1) provides a synthesis of effective practices for instructing ELs; (2) presents four research-based essential elements critical for EL program implementation, teacher reflection, and monitoring of teacher effectiveness; and (3) concludes with program and policy recommendations. Three key areas for policy action are prioritized: (1) District and state level policies must require that local and state leadership support the implementation of these essential elements; (2) Alignment of fiscal and human resources must be targeted to ensure that …

The Dynamics Of Vehicles Under Solid Rocket Propulsion, Robert William Stough

Theses

No abstract provided.

Efficient Uncertainty In Patent Interpretation, Harry Surden

Publications

Research suggests that widespread uncertainty over the scopes of issued patents creates significant costs for third-party firms and may decrease innovation. This Article addresses the scope uncertainty issue from a theoretical perspective by creating a model of patent claim scope uncertainty.

It is often difficult for third parties to determine the legal coverage of issued patents. Scope underdetermination exists when the words of a patent claim are capable of a broad range of plausible scopes ex ante in light of the procedures for interpreting patents. Underdetermination creates uncertainty about claim coverage because a lay interpreter cannot know which interpretation will …