Digital Commons Network^™

Approximations Of Higher-Order Fractional Differentiators And Integrators Using Indirect Discretization, Richa Yadav, Maneesha Gupta

Turkish Journal of Electrical Engineering and Computer Sciences

This paper describes new approximations of fractional order integrators (FOIs) and fractional order differentiators (FODs) by using a continued fraction expansion-based indirect discretization scheme. Different tenth-order fractional blocks have been derived by applying three different s-to-z transforms described earlier by Al-Alaoui, namely new two-segment, four-segment, and new optimized four-segment operators. A new addition has been done in the new optimized four-segment operator by modifying it by the zero reflection method. All proposed half (s$^{\pm 1/2})$ and one-fourth (s$^{\pm 1/4})$ differentiator and integrator models fulfill the stability criterion. The tenth-order fractional differ-integrators (s$^{\pm \alpha })$ based on the modified new optimized …

Using The Finite Element Method To Calculate Parameters For A Detailed Model Of Transformer Winding For Partial Discharge Research, Seyed Mohammad Hassan Hosseini, Seyed Mohsen Enjavi Madar, Mehdi Vakilian

Turkish Journal of Electrical Engineering and Computer Sciences

Power transformers are considered to be one of the most essential and costly pieces of equipment in a power system. Identifying insulation faults in the shortest possible time prevents the occurrence of irreparable damage. Partial discharge (PD) is one of the most significant insulation faults. The first step in the study of PD is the precise modeling of transformer winding at high frequencies. In this paper, the finite element method is used to calculate the parameters for a detailed model of transformer winding. For this reason, a detailed model of transformer winding and the analytic formulations are first presented for …

Mechanical Fault Detection In Permanent Magnet Synchronous Motors Using Equal Width Discretization-Based Probability Distribution And A Neural Network Model, Mehmet Akar, Mahmut Heki̇m, Umut Orhan

Turkish Journal of Electrical Engineering and Computer Sciences

This paper focuses on detecting the static eccentricity and bearing faults of a permanent magnet synchronous motor (PMSM) using probability distributions based on equal width discretization (EWD) and a multilayer perceptron neural network (MLPNN) model. In order to achieve this, the PMSM stator current values were measured in the cases of healthy, static eccentricity, and bearing faults for the conditions of three speeds and five loads. The data was discretized into several ranges through the EWD method, the probability distributions were computed according to the number of current values belonging to each range, and these distributions were then used as …

Estimating Facial Angles Using Radon Transform, Mohamad Amin Bakhshali, Mousa Shamsi

Turkish Journal of Electrical Engineering and Computer Sciences

Analysis of human facial images has become increasingly important due to its numerous applications. In this regard, extracting facial parameters is vital and various studies have been done in this field. Using these methods, different facial parameters such as the location of eyebrows, eye length, and nose angles are extracted. In this article, a robust and automatic method is introduced for determining facial angles from profile view images using the Radon transform. The Radon transform is a type of linear integration along a specific direction and angles play an important role in its performance. The proposed algorithm not only has …

Active And Reactive Power Transmission Loss Allocation To Bilateral Contracts Through Game Theory Techniques, Hamed Nafisi, Hossein Mahdinia Roudsari, Seyed Hossein Hosseinian, Hossein Askarian Abyaneh, Vahid Rasouli Disfani

Turkish Journal of Electrical Engineering and Computer Sciences

Transmission loss has a considerable effect in overall power generation. For fairly distributing the charge of losses to generators and consumers in a deregulated power system, the allocation of this loss is very important. Game-theoretic methods seem fairer for share determination of each participant of a coalition with no discrimination. In this paper, the active and reactive power transmission losses are allocated to bilateral transactions simultaneously through load flow calculations and cooperative game theory solutions. The loss allocation problem and each bilateral transaction are treated as a game and a player of the game, correspondingly. Two game theory-based approaches, the …

Energy Management Of Solar Car In Circuit Race, Erkan Atmaca

Turkish Journal of Electrical Engineering and Computer Sciences

This study develops an optimal driving strategy for solar car on a track with nonzero gradients and sharp corners. This strategy consists of finding the racing line and the speed profile that minimizes the lap time with a given amount of energy. The problem is formulated in proper form for a commercial nonlinear optimization software program. The track is modeled into segments identified by their spatial coordinates on its own surface. The speed-distance behavior of the vehicle is linearized at each segment. The constraints set by the brushless DC motor, battery, and circuit are formulated accordingly. This is the motor …

Decode-And-Forward Relaying Based On Orthogonal Complementary Codes, Refi̇k Çağlar Kizilirmak

Turkish Journal of Electrical Engineering and Computer Sciences

In this note, we propose a full-duplex decode-and-forward cooperative diversity scheme based on code division with orthogonal complementary codes. We consider a simple case in which a single user is assisted by a single relay to achieve cooperative diversity. When the cooperation is full-duplex, the operational delay of the relay makes the channel asynchronous and this may cause multiple-access interference (MAI) between the user and relay. The orthogonal complementary codes have perfect autocorrelation and cross-correlation properties that provide MAI-free operation in asynchronous channels. In the proposed scheme, the user and relay terminals spread their messages with complementary codes and the …

Solution Of Tio$_{2}$ Memristor-Capacitor Series Circuit Excited By A Constant Voltage Source And Its Application To Calculate Operation Frequency Of A Programmable Tio$_{2}$ Memristor-Capacitor Relaxation Oscillator, Reşat Mutlu

Turkish Journal of Electrical Engineering and Computer Sciences

The memristor is a new-found circuit element and its applications in programmable circuits are also under study. Analysis of most of its combinations with other circuit elements such as resistors, capacitors, and inductors does not exist. In this work, a TiO$_{2}$ memristor model with linear dopant drift speed is used and the solution of a TiO$_{2}$ memristor and capacitor series circuit driven by a constant voltage source is given. It is then used to analyze a novel M-C oscillator circuit. In previous programmable oscillator studies, the memristance of the oscillator was assumed to be constant. However, in this study, the …

Semiconductor Laser Beam Bending, Remzi̇ Yildirim, Fati̇h Vehbi̇ Çelebi̇

Turkish Journal of Electrical Engineering and Computer Sciences

This study is about a single-component cylindrical structured lens with a gradient curve that was used for bending laser beams. It operates under atmospheric conditions and bends the laser beam independently of temperature, pressure, polarity, polarization, magnetic field, electric field, radioactivity, and gravity. A single-piece cylindrical lens that can bend laser beams was developed. Lenses are made of transparent, tinted, or colored glass and are used to undermine or absorb the energy of laser beams. This study is not a work of a plasma filamentation, nor is related to a self-accelerating wave packet. Rather, it focuses on bending the laser …

Automatic Classification Of Harmonic Data Using $K$-Means And Least Square Support Vector Machine, Hüseyi̇n Eri̇şti̇, Vedat Tümen, Özal Yildirim, Belkis Eri̇şti̇, Yakup Demi̇r

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper, an effective classification approach to classify harmonic data has been proposed. In the proposed classifier approach, harmonic data obtained through a 3-phase system have been classified by using $k$-means and least square support vector machine (LS-SVM) models. In order to obtain class details regarding harmonic data, a $k$-means clustering algorithm has been applied to these data first. The training of the LS-SVM model has been realized with the class details obtained through the $k$-means algorithm. To increase the efficiency of the LS-SVM model, the regularization and kernel parameters of this model have been determined with a grid …

Prescient: A Predictive Channel Access Schemefor Ieee 802.15.4-Compliant Devices Considering Ieee 802.11 Coexistence, Tolga Çöplü, Sema Fatma Oktuğ

Turkish Journal of Electrical Engineering and Computer Sciences

Coexistence is among the most significant challenges for IEEE 802.15.4-compliant devices in indoor environments. Previous works have shown that IEEE 802.11-compliant devices are the major sources of interference in the 2.4 GHz industrial, scientific, and medical band. In order to overcome the coexistence problem, IEEE 802.15.4-compliant devices should monitor the communication channel and access the channel when it is not in use. In this study, the impact of IEEE 802.11 traffic on IEEE 802.15.4 communication is analyzed and a novel predictive channel access scheme, PRESCIENT (PREdictive channel access SCheme for IEee 802.15.4-compliaNT devices), is proposed. The performance evaluation of the …

Dielectric Loaded Tem Horn-Fed Ridged Horn Antenna Designfor Ultrawideband Ground-Penetrating Impulse Radar, Ahmet Serdar Türk, Ahmet Kenan Keski̇n, Mustafa Dağcan Şentürk

Turkish Journal of Electrical Engineering and Computer Sciences

A modified double-ridged horn structure is proposed to obtain ultrawideband antenna characteristics over a bandwidth ratio of greater than 40:1 for impulse radar systems. The Vivaldi-shaped TEM horn feeder has been designed to extend the lower cut-off frequency and the partial dielectric loading technique using a small lens inward while the aperture has been implemented to enhance the gain of the standard double-ridged horn antenna without changing the physical dimensions. The starting frequency of the antenna operation band is lowered from 800 MHz to 400 MHz. Moreover, approximately 5 dB gain increment level is achieved from 4 to 10 GHz. …

An Implementable Approach In Order To Model A Nonideal Incremental Encoder In Speed Measurement Studies, Mahdi Maaref, Alireza Rezazadeh

Turkish Journal of Electrical Engineering and Computer Sciences

Incremental encoders have attracted significant attention to measure motor speed worldwide. Due to the advantages of incremental encoders a noticeable percentage of Servo system drives have been built based on these sensors. The nonideality of encoders, especially mechanical misalignments, is one of their most important problems, affecting the precision of calculations. In the current paper we present an analytical formula to model the nonideal incremental encoder and calculate both the frequency and magnitude of vibrations due to this nonideality. Moreover, a nonideality identity parameter of the encoder is defined. This parameter can be used for quality assurance purposes. Moreover, it …

A New High-Performance Current-Mode Fuzzy Membership Function Circuit And Its Application, Turgay Temel

Turkish Journal of Electrical Engineering and Computer Sciences

A new current-mode fuzzy-membership function circuit is proposed. The circuit has a very compact and simple architecture based on the simultaneous use of winner- and loser-take-all topologies. The circuit has also the advantage of easily adjusting generated membership function characteristics such as center or mean and width with a straightforward application of respective input currents. It is shown that the new circuit outperforms previous counterparts in terms of speed, power consumption, layout area, and robustness to variations in design parameters and errors. As an application, a fuzzy-classifier is designed with a new membership circuit as a seven fuzzy level controller.

Application Of "Shallow-Water" Numerical Models For Hazard Assessment Of Volcanic Flows: The Case Of Titan2d And Turrialba Volcano (Costa Rica), Sylvain J. Charbonnier, José L. Palma, Sarah Ogburn

School of Geosciences Faculty and Staff Publications

This paper introduces Titan2D, a depth averaged model of an incompressible Coulomb continuum for "shallow water" granular flows. Titan2D has been used successfully at many volcanoes to predict inundation by block-and-ash flows and debris avalanches. It can be run as a stand-alone program or through Vhub, a cyber-infrastructure platform. Practical considerations of choosing appropriate user inputs and the basics of running the model are discussed herein. Both synthetic and natural terrain examples are presented, including simulations of a block-and-ash flow generated from the gravitational collapse of a synthetic dome at Turrialba volcano (Costa Rica). These results suggest that the model …

Developing And Verifying A Set Of Principles For The Cyber Security Of The Critical Infrastructures Of Turkey, Bilge Karabacak

All Faculty and Staff Scholarship

Critical infrastructures are vital assets for countries as a harm given to critical infrastructures may affect public order, economic welfare and/or national security. Today, cyber systems are extensively used to control and monitor critical infrastructures. Therefore, cyber threats have the potential to adversely affect the order of societies and countries. In this PhD study, the root causes of the susceptibility of the critical infrastructures of Turkey to the cyber threats are identified by analyzing the qualitative data with the grounded theory method. The extracted root causes are verified by two experts. The set of principles for the cyber security of …

Revising By Numbers: Promoting Student Revision Through Accumulated Points, Mark Mcbeth

Journal of Response to Writing

In an effort to rethink the evaluation of student writing with the ultimate goal of convincing novice writers that rewriting predicates as well as presupposes the act of writing, I describe a point-accrual grading system where students accumulate points with redrafted submissions during a semester. This approach to evaluation offers students more autonomy in controlling their “earned” grade as well as incentivizes their investments in the revision process. In contrast to the normative percentages approach to grading, this point-accrual system not only gives students a less ambivalent form of grading but also moves them past surface-level revision and into rhetorical …

Volume 1 Number 2 (2015)

Journal of Response to Writing

No abstract provided.

Symbiotic Werewolves And Cybernetic Anchoresses: Premodern Posthumans In Medieval Literature, Jennifer K. Cox

Quidditas

This paper examines how individual agency in medieval society might be expanded through posthuman configurations; in so doing, it pushes the boundaries of traditional practices in medieval research to include more contemporary ideas. Although as scholars, we must avoid anachronistic readings of these texts, ignoring modern thinkers like N. Katherine Hayles (How We Became Posthuman) and Donna Haraway (“A Cyborg Manifesto”) too easily disregards their valuable – and timeless – insights. While the term “posthuman” can evoke images of cyborgs or superhuman mutants using wormholes to traverse space and time, this pop culture perspective often overlooks less technoscientific examples of …

De-Suturing Milton's Eden: Navigating From An Althusserian Bipartite System To A Badiouian Set In Paradise Lost, Brittany Strobelt

Criterion: A Journal of Literary Criticism

No abstract provided.

Hyperglycemia And Inhibition Of The Monocarboxylate Transporter 1 (Mct1) Enhances Growth Arrest In Cancer Cells, Aleksandra I. Pivovarova

Theses

Many cancer cells rely predominately on glycolysis for their energy production, even in the presence of oxygen. They proceed further and reduce the glycolysis product pyruvate to lactate, by means of fermentation, for continued ATP production. This phenomenon is called the Warburg effect, and is associated with an upregulation of glycolysis and increased lactate production. A persistent increase in glycolysis and ATP turnover leads to an intracellular proton accumulation, which could eventually lead to cell damage and death by cytosolic acidification. However, cancer cells avoid acidification and maintain an appropriate intracellular pH by employing monocarboxylate transporters for the coupled export …

Simulation Of The Propagation Of An Electromagnetic Wave In Dielectric Medium With A Time Varying Dielectric Constant, Sai Chandu Radavaram

Theses

No abstract provided.

Impact Of Size, Secondary Structure, And Counterions On The Binding Of Small Ribonucleic Acids To Layered Double Hydroxide Nanoparticles, B. V. Rodriguez, J. Pescador, N. Pollok, G. W. Beall, Corina Maeder, L. K. Lewis

Chemistry Faculty Research

Use of ribonucleic acid (RNA) interference to regulate protein expression has become an important research topic and gene therapy tool, and therefore, finding suitable vehicles for delivery of small RNAs into cells is of crucial importance. Layered double metal hydroxides such as hydrotalcite (HT) have shown great promise as nonviral vectors for transport of deoxyribose nucleic acid (DNA), proteins, and drugs into cells, but the adsorption of RNAs to these materials has been little explored. In this study, the binding of small RNAs with different lengths and levels of secondary structure to HT nanoparticles has been analyzed and compared to …

Underwater Implosion Of Cylindrical Metallic Shells In Confining Environments, Sachin Gupta

Open Access Dissertations

A fundamental experimental investigation was conducted to understand the underwater dynamic implosion of cylindrical metallic shells. In particular, the attention was focused on studying the generation of pressure waves from implosion in varying confining situations such that the fluid structure interaction with the confined structures governs the mechanics of implosion process. The experiments were conducted in three environments: (a) free-field environment represented by a large underwater pressure vessel facility, (b) partially closed environment represented by one-end open confining tube, (c) completely closed environment represented by closed confining tube. This study also utilizes the visualization and understanding of the realtime deformation …

Planar Difference Equations: Asymptotic Behavior Of Solutions And 1-1 Resonant Points, William T. Jamieson

Open Access Dissertations

In order to study the global behavior of difference equations, it is necessary to understand the local behavior in a neighborhood of a equilibrium point of the difference equation. This thesis focuses on two aspects of the local behavior of planar difference equations: the asymptotic behavior of a solution converging to a hyperbolic fixed point, and the local qualitative behavior of a non isolated fixed point whose jacobian matrix has a particular structure.

Manuscript 2 describes how closely a convergent solution {X_n} of (real or complex) difference equations x_n+1 = J x_n + f _n(x …

Goal Representation Adaptive Dynamic Programming For Machine Intelligence, Zhen Ni

Open Access Dissertations

This dissertation is focused on a general purpose new framework for machine intelligence based on adaptive dynamic programming (ADP) design. This research is significantly important for developing self-adaptive intelligent system that is highly robust and fault-tolerant to uncertain and unstructured environments. Generally, there are two key components toward building truly self-adaptive systems: fundamental understanding of brain intelligence and complex engineering designs. This dissertation will focus on general purpose computational intelligence methodologies from a biological inspired perspective, and develop a new self-learning machine intelligent system online over time. Furthermore, this new approach will also be explored on wide critical engineering applications. …

Campus Open Access Funds: Experiences Of The Ku “One University” Open Access Author Fund, Rachel Gyore, Allison C. Reeve, Crystal Cameron-Vedros, Deborah Ludwig, Ada Emmett

Library Faculty Publications

In the summer of 2012, librarians from the Lawrence and Kansas City campuses of the University of Kansas (KU) proposed the creation of a KU “One University” Open Access Fund (OA Author Fund) to support open access publishing for its faculty, students, and staff. KU is a major public research and teaching institution of 28,000 students and 2,600 faculty on five campuses (Lawrence, Kansas City, Overland Park, Wichita, and Salina) (http://ku.edu/about), and has been a leader in open access initiatives for many years. A working group of librarians came together to create and implement a pilot project to explore the …

Response To Intervention To Educate The Diverse Needs Of Elementary Students, James H. Mcmillan, Valerie J. Robnolt, Amy C. Hutton

MERC Publications

Much research has been done regarding how to implement RTI, effective strategies for RTI, and outcomes of RTI, which is not the focus of the current study. This investigation will focus on assessing the current perceptions of elementary school educators and staff on thier current understanding of and needs for more effective implementation of RTI.

Countersupermajoritarianism, Frederic Bloom, Nelson Tebbe

Publications

How should the Constitution change? In Originalism and the Good Constitution, John McGinnis and Michael Rappaport argue that it ought to change in only one way: through the formal mechanisms set out in the Constitution’s own Article V. This is so, they claim, because provisions adopted by supermajority vote are more likely to be substantively good. The original Constitution was ratified in just that way, they say, and subsequent changes should be implemented similarly. McGinnis and Rappaport also contend that this substantive goodness is preserved best by a mode of originalist interpretation. In this Review, we press two main arguments. …

Fuzzy Sliding Mode Control Applied To A Doubly Fed Induction Generator For Wind Turbines, Sid Ahmed El Mehdi Ardjoun, Mohamed Abid

Turkish Journal of Electrical Engineering and Computer Sciences

In this paper an indirect vector control using fuzzy sliding mode control is proposed for a double-fed induction generator (DFIG), applied for a wind energy conversion system in variable speed. The objective is to independently control the active and reactive power generated by the DFIG, which is decoupled by the orientation of the flux. The sliding mode control finds its strongest justification for the problem concerning the use of a robust nonlinear control law for the model uncertainties. As far as the fuzzy mode control is concerned, it aims at reducing the chattering effect. The obtained results show the increasing …