Digital Commons Network^™

Prior Knowledge Input Method In Device Modeling, Serdar Heki̇mhan, Serdar Menekay, N. Serap Şengör

Turkish Journal of Electrical Engineering and Computer Sciences

The artificial neural networks are being used in modelling electronic elements and devices especially at microwave frequencies where non-linearity and dependence on frequency cannot be neglected. In this paper, instead of using artificial neural networks as a unique modelling device prior knowledge input method based on feed-forward artificial neural network structures as multi-layer perceptrons and wavelet-based neural networks is investigated. The benefits of prior knowledge input method over plain usage of artificial neural networks in modelling BJT is explored by comparing models obtained with and without prior knowledge input. The novelty of the paper is utilizing wavelet-based neural networks as …

Transformer Protection Using The Wavelet Transform, Okan Özgönenel, Güven Önbi̇lgi̇n, Çağri Kocaman

Turkish Journal of Electrical Engineering and Computer Sciences

This paper introduces a novel approach for power transformer protection algorithm. Power system signals such as current and voltage have traditionally been analysed by the Fast Fourier Transform. This paper aims to prove that the Wavelet Transform is a reliable and computationally efficient tool for distinguishing between the inrush currents and fault currents. The simulated results presented clearly show that the proposed technique for power transformer protection facilitates the accurate discrimination between magnetizing inrush and fault currents in transformer protection.

Multilayer Capacitor Model Of The Earth's Upper Crust, Berk Üstündağ, Özcan Kalenderli̇, Haluk Eyi̇doğan

Turkish Journal of Electrical Engineering and Computer Sciences

In this study, an equivalent electric circuit model of Earth's upper crust is proposed to explain the behavior of measurement patterns acquired from network of the earthquake forecast project. A multi-layer capacitor model having active components that couples with the monopolar probe close to the surface is used to determine earthquake precursory patterns due to structural changes in time. Equivalent circuit model was developed for a) dilatency process that is assumed to be a stress weakening reason and b) external force source that increases shear stress over the fault until sudden decrement before the earthquake. A data acquisition system consisting …

Cover And Contents

Turkish Journal of Electrical Engineering and Computer Sciences

No abstract provided.

Turbo Codes: The Issue Of Average Union Upper Bound Under Imperfect Channel State Information In Rayleigh Fading Channels, Erhan A. İnce, Syed Amjad Ali

Turkish Journal of Electrical Engineering and Computer Sciences

The potential of turbo codes to demonstrate excellent performance in the region of low signal to noise ratio is now a familiar fact. The idea of turbo codes was first introduced by Berrou and was based on the clever utilization of the existing decoding mechanism of BCJR with a change in the encoder by introducing feedback and an interleaver in the overall scheme. Since then, these powerful forward error correcting codes have attained a significant attention and have either replaced or have become a sturdy candidate for many applications in this era of modern communication systems. So far, a lot …

Two-Variable Scattering Formulas To Describe Some Classes Of Lossles Two-Ports With Mixed, Lumped Elements And Commensurate Stubs, Ahmet Sertbaş

Turkish Journal of Electrical Engineering and Computer Sciences

Using the semi-analytic method based on the construction of two-variable scattering functions, which describe lossless two-ports with two kinds of elements, for some classes of ladder networks formed with lumped elements and commensurate stubs, the explicit descriptive formulas are produced up to six mixed-elements. To exhibit the efficiency of the explicit descriptive equations in the design of the broadband microwave circuits, a single matching design problem (UHF antenna matching) is solved by using the obtained two-variable scattering formulas.

Performance Analysis Of A Fuzzy Logic Based Rotor Resistance Estimator Of An Indirect Vector Controlled Induction Motor Drive, Y. Miloud, Azeddine Draou

Turkish Journal of Electrical Engineering and Computer Sciences

This paper presents a simple method for estimating rotor resistance in an indirect vector-controlled induction motor drive. This is important in vector control, if high-performance torque control is needed. For this purpose, a rotor resistance estimator using fuzzy logic technique is used and analysis, design, and digital simulations are carried out to demonstrate the effectiveness of the proposed estimator.

A Robustness Analysis Procedure For Realistic Missiles, Reşat Özgür Doruk, Erol Kocaoğlan

Turkish Journal of Electrical Engineering and Computer Sciences

This paper presents a robustness analysis procedure for short range realistic missile autopilots. The sensitivity of the autopilots to the aerodynamic parameter uncertainties is investigated through the structured singular value theory where the results are verified through nonlinear simulations. Different types of perturbations are implemented in order to measure the complete performance of the missile.

Implementation Of A New Self-Tuning Fuzzy Pid Controller On Plc, Onur Karasakal, Engi̇n Yeşi̇l, Müjde Güzelkaya, İbrahi̇m Eksi̇n

Turkish Journal of Electrical Engineering and Computer Sciences

In this study, the self-tuning method for fuzzy PID controllers that has been developed in a previous study of the authors is implemented on PLC in order to control some standard processes formed on FEEDBACK PCS 327 Process Control Simulator. In this tuning method, the input scaling factor corresponding to the derivative coefficient and the output scaling factor corresponding to the integral coefficient of the fuzzy PID controller are adjusted using a fuzzy inference mechanism with a new input called ``normalized acceleration''. The results of the implementation have been compared with those of the classical fuzzy PID controller without a …

Cover And Contents

Turkish Journal of Electrical Engineering and Computer Sciences

No abstract provided.

A Survey On The H.264/Avc Standard, Nükhet Özbek, Turhan Tunali

Turkish Journal of Electrical Engineering and Computer Sciences

H.264/AVC is a recently completed video compression standard jointly developed by ITU-T VCEG and ISO/IEC MPEG standards committees. The standard is becoming more popular as it promises much higher compression than that possible with earlier standards. The standard provides flexibilities in coding and organization of data which enable efficient error resilience. The increased coding efficiency offers new application areas and business opportunities. As might be expected, the increases in compression efficiency and flexibility come at the expense of increase in complexity, which is a fact that must be overcome. This paper provides an overview of the technical features of H.264 …

Control Charts Approach For Scenario Recognition In Video Sequences, Ersi̇n Elbaşi, Long Zuo, Kishan Mehrotra, Chilukuri Mohan, Pramod Varshney

Turkish Journal of Electrical Engineering and Computer Sciences

A new approach, based on control charts, is presented for the task of recognition of events and scenarios in video image sequences. For each image in the sequence, low level image processing and feature extraction steps result in feature descriptors for objects of interest detected in the images. Control charts analysis is then explored to classify the nature of the activity depicted by the temporal changes in these features over the image sequence. Scenario recognition with higher accuracy is achieved using this simple approach.

A Model For User Profiling Systems With Interacting Agents, Sanem Sariel, Tevfi̇k Akgün

Turkish Journal of Electrical Engineering and Computer Sciences

Service systems according to users' personal demands and preferences are on their way to provide required services in many application domains. Emulation of interactive model of human societies produces valuable outcomes for such systems. In this work, a system model with interactive agents for multi user service systems is proposed. A novel social interactive agent model using different interaction forms is also included in this proposal. In this model, agents decide how to serve to their users by considering their users' profiles and information from other agents. User clusters are formed by clustering techniques. The Q-learning algorithm is used for …

A Content-Based Fuzzy Image Database Based On The Fuzzy Artmap Architecture, M. Uysal, Fatoş Tünay Yarman Vural

Turkish Journal of Electrical Engineering and Computer Sciences

A major design issue in content-based image retrieval system is the selection of the feature set. This study attacks the problem of finding a discriminative feature for each class, which is optimal in some sense. Fuzzy ARTMAP architecture is used to find this discriminative feature set. For this purpose, initially, a large variety of features are extracted from the regions of the pre-segmented images. Then, the feature set of each object class is learned using the Fuzzy Art Map Architecture, by identifying the weights of each feature for each object class. In the querying phase, trained set of feature weights …

Color Image Profiling Using Fuzzy Sets, Amine Ait Younes, Isis Truck, Herman Akdag

Turkish Journal of Electrical Engineering and Computer Sciences

In this article, a software for image indexing and retrieval is presented. The classification proposed here is based on the dominant color(s) of the images. The process consists in assigning a colorimetric profile to the image in HLS space (Hue, Lightness, Saturation). First, the definition of hue is done thanks to a fuzzy representation to take into account the non-uniformity of colors distribution. And then, lightness and saturation are represented through linguistic qualifiers also defined in a fuzzy way. Finally, the profile is built through fuzzy functions representing the membership degree of the image to different classes. In order to …

Cover And Contents

Turkish Journal of Electrical Engineering and Computer Sciences

No abstract provided.

The Birth Of The Authornym: Authorship, Pseudonymity, And Trademark Law, Laura A. Heymann

Faculty Publications

Consumers in the marketplace of ideas are well acquainted with one aspect of the Foucauldian concept of the "author function": the way in which an author's name serves to organize both producer inputs-the various works the author wishes to have associated with his name-and consumer inputs-the readers' interpretive reactions to any particular body of work. Indeed, choosing to write under a pseudonym or under one's true name is the way in which an author exerts control over this function by grouping certain works (for example, scholarly pieces) under one name and other works (for example, mystery novels) under a different …

Technology-Augmented Courtrooms: Progress Amid A Few Complications, Or The Problematic Interrelationship Between Court And Counsel, Fredric I. Lederer

Faculty Publications

No abstract provided.

Profile: Judge George H. Aldrich, Nancy Amoury Combs

Faculty Publications

No abstract provided.

Judicial Federalism And The Future Of Federal Environmental Regulation, Jonathan H. Adler

Faculty Publications

This article assesses the current and likely impact of the Supreme Court's federalism cases on federal environmental regulation. As a result of this assessment, the article seeks to make four points: (1) Thus far, the Supreme Court's federalism cases have had a limited impact on federal regulation, as federal courts have not used these cases as a basis for limiting the reach of federal regulatory authority. (2) Notwithstanding this limited impact, the underlying logic of the Supreme Court's cases does pose a challenge for federal regulation, particularly in the Commerce Clause context. (3) The thrust of the federalism cases makes …

Jurisdictional Mismatch In Environmental Federalism, Jonathan H. Adler

Faculty Publications

Jurisdictional mismatch plagues contemporary environmental law and policy. The division of authority and responsibility for environmental protection between the federal and state governments lacks any cohesive rationale or justification. The federal government regulates in many areas where there is no clear analytical basis for federal involvement. At the same time, the federal government is relatively absent where a stronger federal presence could be justified. Conversely, states are precluded, discouraged, or otherwise inhibited from adopting environmental protections where state efforts would be worthwhile. In addition, state intervention seeps into areas where a dominant federal role would be more defensible. This jurisdictional …

Back To The Future Of Conservation: Changing Perceptions Of Property Rights & Environmental Protection, Jonathan H. Adler

Faculty Publications

Some environmental scholars and policymakers have been particularly critical of classical liberal conceptions of private property on both theoretical and practical grounds, suggesting that traditional notions of property rights are incompatible with the demands of environmental protection. Perceiving an environmental crisis borne from Lockean conceptions of property and capitalism, many environmental thinkers came to view the legal protection of private property as an obstacle to environmental sustainability. As a result, the development of command-and-control regulation in the 1960s and 1970s was influenced by the ecological critique of private property.

In recent years, however, the perception of private property's role in …

Corporations And Autonomy Theories Of Contract: A Critique Of The New Lex Mercatoria, Nathan B. Oman

Faculty Publications

One of the central problems of contracts jurisprudence is the conflict between autonomy theories of contract and efficiency theories of contract. One approach to solving this conflict is to argue that in the realm of contracts between corporations, autonomy theories have nothing to say because corporations are not real people with whose autonomy we need to be concerned. While apparently powerful, this argument ultimately fails because it implicitly assumes theories of the corporation at odds with economic theories of law. Economics, in turn, offers a vision of the firm that is quite hospitable to autonomy theories of contract. The failure …

Is Morrison Dead? Assessing A Supreme Drug (Law) Overdose, Jonathan H. Adler

Faculty Publications

There was little doubt that the federal government would prevail in Gonzales v. Raich. What was, perhaps, so unexpected was so expansive a repudiation of enforceable judicial limitations on federal power. In upholding the constitutionality of the Controlled Substances Act as-applied to the non-commercial intrastate possession and consumption of marijuana for medical purposes as authorized under California law, the Supreme Court hollowed out the core of contemporary Commerce Clause jurisprudence. Insofar as United States v. Morrison had stood for the propositions that only intrastate economic activities could be aggregated for purposes of the “substantial [e]ffects” test, that attenuated connections …

Unity And Pluralism In Contract Law, Nathan B. Oman

Faculty Publications

No abstract provided.

Zelman V. Simmons-Harris, Neal Devins

Faculty Publications

No abstract provided.

Imagining Europe: Carles Batlle's Combat (Landscape In The Aftermath), Sharon G. Feldman

Latin American, Latino and Iberian Studies Faculty Publications

At the end of Suite (1999), an award-winning play by Catalan dramatist Carles Batlle i Jordà, there is a memorable scene in which the spectators observe the collapse of a doll house upon the living room floor. It is a metaphor of domestic, as well as global, instability—not to mention, an ironic reference to Ibsen—in which the audience is left to wonder whether the character of Berta, confused and disoriented in the suite of an old hotel, will return to the mirage-like image of bourgeois European domesticity, to a home and marriage without foundations, or whether she will flee to …

Does An Individual Lacking Contractual Privity Have Standing Under § 1981 To Bring A Claim For Racial Discrimination?, Ralph C. Anzivino

Faculty Publications

No abstract provided.

What Is The Scope Of The Federal Tort Claims Act's Wavier Of Sovereign Immunity?, Ralph Anzivino

Faculty Publications

No abstract provided.

Cultural Studies At R.I.T./U.S.A: Of Visual Culture And Pedagogical Interventions, Amit Ray

Articles

Abstract:

This paper examines the role of Cultural Studies in addressing the limitations of American visual culture through pedagogical interventions at Rochester Institute of Technology. Ray argues that despite globalization's potential to enhance international understanding, American visual media remains largely ethnocentric and resistant to representing the complex realities of global interconnectedness. Using the recent Iraq War as an example, he demonstrates how media coverage systematically obscured cultural, historical, and linguistic contexts while promoting martial nationalism. The author proposes using popular animated television programs like The Simpsons and South Park as pedagogical tools to expose the contradictory nature of contemporary media …