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2006

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Investigation Of Soft Failure Of Small Form Factor Hdd Under Forced Vibration, K. T. Chua, A. Yudhanto, E. H. Ong, J. Q. Mou Dec 2006

Investigation Of Soft Failure Of Small Form Factor Hdd Under Forced Vibration, K. T. Chua, A. Yudhanto, E. H. Ong, J. Q. Mou

Mechanical and Aerospace Engineering Faculty Research & Creative Works

As small form factor hard disk drives (HDD) are increasingly used in portable consumer devices, the performance of the HDD in daily activity is highly concerned. In this paper, the soft failure of the hard disk drive under forced vibration is investigated. To investigate the cause of the soft failure, experimental frequency analysis was conducted. Modal analysis of HDD was completed by experiment and verified by FEM simulations and the result was compared to the frequency response result. Studies show that the vibration modes of head suspension assembly (HSA) and disk platter at higher resonant frequencies do not directly relate …

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The Impact Of Quiet Time On The Sleep Quality Of Cardiothoracic Surgery Patients, Kristina L. Nelson Dec 2006

The Impact Of Quiet Time On The Sleep Quality Of Cardiothoracic Surgery Patients, Kristina L. Nelson

Graduate Research Projects

The purpose of this study was to observe patients' quality of sleep on a cardiothoracic step-down unit before and after institution of an "undisturbed quiet time" policy from eleven o'clock in the evening until five in the morning. It was hypothesized that these patients have improved sleep quality after institution of the Quiet Time protocol. The comparative group, quasi-experimental study utilized the Verran and Snyder-Halpern Sleep Scale and Factors Influencing Sleep Questionnaire to measure sleep disturbance, effectiveness, and supplementation. Results demonstrated a decrease in sleep disturbance with initiation of the Quiet Time, but no significant change in sleep effectiveness and …

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Novel Capacitance Extraction Method Using Direct Boundary Integral Equation Method And Hierarchical Approach, L. (Lijun) J. Jiang, B. J. Rubin, J. D. Morsey, H. T. Hu, A. Elfadel Dec 2006

Novel Capacitance Extraction Method Using Direct Boundary Integral Equation Method And Hierarchical Approach, L. (Lijun) J. Jiang, B. J. Rubin, J. D. Morsey, H. T. Hu, A. Elfadel

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, a novel hierarchical capacitance extraction method is introduced. It takes advantage of surface integral equations to have far less unknowns than the volumetric method. It uses the "divide and conquer" strategy to hierarchically solve the dense capacitance matrix efficiently. It partitions the problem into small regions (cells) automatically and each region is analyzed separately. An inverse binary-tree browse procedure is employed to combine cell capacitance matrixes from leafy level of the tree to the root. A global capacitance matrix is obtained at the root without computing charge distribution. Benchmarks using the developed code CSurf are provided to …

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The Use Of Fast Integral Equations Solvers For Practical Package And Interconnect Analysis, J. D. Morsey, B. J. Rubin, L. (Lijun) Jiang, L. Shan, L. B. Eisenberg, D. Becker, M. Arseneault Dec 2006

The Use Of Fast Integral Equations Solvers For Practical Package And Interconnect Analysis, J. D. Morsey, B. J. Rubin, L. (Lijun) Jiang, L. Shan, L. B. Eisenberg, D. Becker, M. Arseneault

Electrical and Computer Engineering Faculty Research & Creative Works

Fast integral equation methods are now being applied to packaging and other such "low frequency" problems. This paper explores some of the issues surrounding such an application to real, product level packaging and interconnect type structures. Discussed are issues such as low frequency breakdown, mesh aspect ratios, and solver convergence. Finally, integral equation solver examples are presented using the IBM internally developed pre-corrected FFT (PFFT) solver labeled EMSurf[l]. ©2006 IEEE.

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Integral Equation Solvers For Real World Applications -Some Challenge Problems, W. C. Chew, I. T. Chiang, C. P. Davis, A. Hesford, M. K. Li, Y. Liu, Z. G. Qian, M. Saville, L. Sun, M. S. Tong, J. Xiong, L. (Lijun) J. Jiang, H. Y. Chao, Y. H. Chu Dec 2006

Integral Equation Solvers For Real World Applications -Some Challenge Problems, W. C. Chew, I. T. Chiang, C. P. Davis, A. Hesford, M. K. Li, Y. Liu, Z. G. Qian, M. Saville, L. Sun, M. S. Tong, J. Xiong, L. (Lijun) J. Jiang, H. Y. Chao, Y. H. Chu

Electrical and Computer Engineering Faculty Research & Creative Works

No abstract provided.

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Numerical Analysis Of Sandwiched Composite-Fss Structures, Qiang Rui, Chen Ji, Huang Jingyu, Maria Koledintseva, Richard E. Dubroff, James L. Drewniak, Yang Fan Dec 2006

Numerical Analysis Of Sandwiched Composite-Fss Structures, Qiang Rui, Chen Ji, Huang Jingyu, Maria Koledintseva, Richard E. Dubroff, James L. Drewniak, Yang Fan

Electrical and Computer Engineering Faculty Research & Creative Works

A numerical technique to analyze shielding effectiveness of sandwiched FSS-composite structures is proposed. This technique is based on using a dispersive FDTD method in conjuncture with a novel periodic boundary condition to model sandwiched FSS-composite elements. Results show that by inserting single or multilayered FSS elements into composite materials, better shielding effectiveness can be achieved. © 2006 IEEE.

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The Importance Of Continuity In First Language Education For Learning A Second Language, Stephen M. Shepherd Dec 2006

The Importance Of Continuity In First Language Education For Learning A Second Language, Stephen M. Shepherd

Theses and Dissertations - UTB/UTPA

Scores from the Texas Reading Proficiency Tests in English (RPTE) for ninety-four Newcomer ESL students were analyzed to understand the differences between students who had attended school continuously and those who had discontinuity in their first language (LI) education in their home country. This research was performed in the Rio Grande Valley of South Texas, a few miles from the border with Mexico. The hypothesis is that students who have gaps in their L1 education will not learn to read as quickly in English as those who had none since the former are lacking cognitive skills which the latter already …

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The Critique Of Arab Thought: Mohammed Arkoun's Deconstruction Method, Siti Rohmah Soekarba Dec 2006

The Critique Of Arab Thought: Mohammed Arkoun's Deconstruction Method, Siti Rohmah Soekarba

Makara Human Behavior Studies in Asia

Mohammed Arkoun is one of international modern Islamic thinkers that his thought comes into Islamic thinking discourses in Indonesia recently. His Islamic thought was influenced by the modern philosophical concepts such as ‘myths’ of Ricouer, postmodern concepts like ‘discourse’ and ‘episteme’, which were developed by Foucault as well as ‘deconstruction’ of Derrida. If Derrida focused on deconstruction as a final concept, on the other hand Arkoun insisted that ‘deconstruction’ must be followed by ‘reconstruction’ of a discourse. Arkoun’s reconstruction leaves the limitation, the rigidity and deviation from the past. Arkoun proposes two ways: firstly it is ‘ijtihad’ and subsequently it …

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Environmental And Resource Management Under Myopia, Tomoki Fujii Dec 2006

Environmental And Resource Management Under Myopia, Tomoki Fujii

Research Collection School Of Economics

Myopia is important in environmental and resource management problems because they often involve intertemporal decisions over a long time horizon. We present a parsimonious extension of standard dynamic programming equation in a continuous time and continuous state setting, which enables rich description of myopic behavior. In our model, the process of planning future controls and choosing current control are clearly distinguished. We Illustrate the behavior of various types of myopic agents with a simple example of non-renewable resource extraction, and discuss the policy relevance of the expiry of extraction permits to resource management under Myopia.

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Campaign Tactics And Citizens' Electoral Decisions, Massimiliano Landi, Chun Seng Yip Dec 2006

Campaign Tactics And Citizens' Electoral Decisions, Massimiliano Landi, Chun Seng Yip

Research Collection School Of Economics

This paper considers how electoral competition affects voters’ turnout and candidate choice. We do so via an instrumental-variable (IV) bivariate probit with selection which jointly estimates both processes. Our analysis controls for individual and election characteristics, campaigning, and election day weather. We focus on the effects of negative advertising (tone) and overall spending (intensity) on several aspects of voter behavior, including abstentions. Our findings: tone increases turnout of Independents only, and can strengthen partisanship among non-voters. Campaign intensity matters more than tone. Overall, there is evidence that Democrats, Independents and Republicans have different propensities to react to campaigning, which do …

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A Two-Stage Realized Volatility Approach To Estimation Of Diffusion Processes With Discrete Data, Peter C. B. Phillips, Jun Yu Dec 2006

A Two-Stage Realized Volatility Approach To Estimation Of Diffusion Processes With Discrete Data, Peter C. B. Phillips, Jun Yu

Research Collection School Of Economics

This paper motivates and introduces a two-stage method of estimating diffusion processes based on discretely sampled observations. In the first stage we make use of the feasible central limit theory for realized volatility, as developed in [Jacod, J., 1994] and [Barndorff-Nielsen, O., Shephard, N., 2002], to provide a regression model for estimating the parameters in the diffusion function. In the second stage, the in-fill likelihood function is derived by means of the Girsanov theorem and then used to estimate the parameters in the drift function. Consistency and asymptotic distribution theory for these estimates are established in various contexts. The finite …

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Maximum Likelihood And Gaussian Estimation Of Continuous Time Models In Finance, Peter C. B. Phillips, Jun Yu Dec 2006

Maximum Likelihood And Gaussian Estimation Of Continuous Time Models In Finance, Peter C. B. Phillips, Jun Yu

Research Collection School Of Economics

This paper overviews maximum likelihood and Gaussian methods of estimating continuous time models used in finance. Since the exact likelihood can be constructed only in special cases, much attention has been devoted to the development of methods designed to approximate the likelihood. These approaches range from crude Euler-type approximations and higher order stochastic Taylor series expansions to more complex polynomial-based expansions and infill approximations to the likelihood based on a continuous time data record. The methods are discussed, their properties are outlined and their relative finite sample performance compared in a simulation experiment with the nonlinear CIR diffusion model, which …

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Mixing Frequencies: Stock Returns As A Predictor Of Real Output Growth, Anthony S. Tay Dec 2006

Mixing Frequencies: Stock Returns As A Predictor Of Real Output Growth, Anthony S. Tay

Research Collection School Of Economics

We investigate two methods for using daily stock returns to forecast, and update forecasts of, quarterly real output growth. Both methods aggregate daily returns in some manner to form a single stock market variable. We consider (i) augmenting the quarterly AR(1) model for real output growth with daily returns using a nonparametric Mixed Data Sampling (MIDAS) setting, and (ii) augmenting the quarterly AR(1) model with the most recent r -day returns as an additional predictor. We find that our mixed frequency models perform well in forecasting real output growth.

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Multivariate Stochastic Volatility, Manabu Asai, Michael Mcaleer, Jun Yu Dec 2006

Multivariate Stochastic Volatility, Manabu Asai, Michael Mcaleer, Jun Yu

Research Collection School Of Economics

The literature on multivariate stochastic volatility (MSV) models has developed significantly over the last few years. This paper reviews the substantial literature on specification, estimation and evaluation of MSV models. A wide range of MSV models is presented according to various categories, namely (i) asymmetric models; (ii) factor models; (iii) time-varying correlation models; and (iv) alternative MSV specifications, including models based on the matrix exponential transformation, Cholesky decomposition, Wishart autoregressive process, and the empirical range. Alternative methods of estimation, including quasi-maximum likelihood, simulated maximum likelihood, Monte Carlo likelihood, and Markov chain Monte Carlo methods, are discussed and compared. Various methods …

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Household Heterogeneity And Optimal Inter-Temporal Pricing For A Durable-Good Monopoly, Winston T. H. Koh Dec 2006

Household Heterogeneity And Optimal Inter-Temporal Pricing For A Durable-Good Monopoly, Winston T. H. Koh

Research Collection School Of Economics

In this paper, I extend the analysis in Koh (2006) to examine the optimality of inter-temporal price discrimination for a durable-good monopoly in a model where infinitely-lived households consume both durable goods and a stream of non-durable goods subject to different inter-temporal budget constraints. I also consider the multi-dimensional setting where households differ in both inter-temporal budget constraints and the utilities they derive from the consumption of the durable good.

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Volunteers Share The Holiday Spirit, University Relations Dec 2006

Volunteers Share The Holiday Spirit, University Relations

Campus News Archive

In the spirit of the holidays, students, staff and faculty at the University of Minnesota, Morris are coordinating a variety of volunteer projects that will benefit local individuals and families as well as those in communities surrounding Morris.

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Formal Analysis And Systematic Construction Of Two-Factor Authentication Scheme, Guomin Yang, Duncan S. Wong, Huaxiong Wang, Xiaotie Deng Dec 2006

Formal Analysis And Systematic Construction Of Two-Factor Authentication Scheme, Guomin Yang, Duncan S. Wong, Huaxiong Wang, Xiaotie Deng

Research Collection School Of Computing and Information Systems

One of the most commonly used two-factor authentication mechanisms is based on smart card and user’s password. Throughout the years, there have been many schemes proposed, but most of them have already been found flawed due to the lack of formal security analysis. On the cryptanalysis of this type of schemes, in this paper, we further review two recently proposed schemes and show that their security claims are invalid. To address the current issue, we propose a new and simplified property set and a formal adversarial model for analyzing the security of this type of schemes. We believe that the …

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Continuous Monitoring Of Knn Queries In Wireless Sensor Networks, Yuxia Yao, Xueyan Tang, Ee Peng Lim Dec 2006

Continuous Monitoring Of Knn Queries In Wireless Sensor Networks, Yuxia Yao, Xueyan Tang, Ee Peng Lim

Research Collection School Of Computing and Information Systems

Wireless sensor networks have been widely used for civilian and military applications, such as environmental monitoring and vehicle tracking. In these applications, continuous query processing is often required and their efficient evaluation is a critical requirement to be met. Due to the limited power supply for sensor nodes, energy efficiency is a major performance measure in such query evaluation. In this paper, we focus on continuous kNN query processing. We observe that the centralized data storage and monitoring schemes do not favor energy efficiency. We therefore propose a localized scheme to monitor long running nearest neighbor queries in sensor networks. …

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A Universal Copyright Fund: A New Way To Bridge The Copyright Divide, Kung-Chung Liu, Haochen Sun Dec 2006

A Universal Copyright Fund: A New Way To Bridge The Copyright Divide, Kung-Chung Liu, Haochen Sun

Research Collection Yong Pung How School Of Law

The ever-increasing digitization of works, along with the deployment of technical measures to protect such works and the expansive use of the Internet, further exacerbate the divide between the IP-rich and IP-poor countries in their ability to benefit from such works. It is suggested by this paper that to borrow from experiences on how the telecommunications world provides universal service to each and every household at affordable prices, and to endeavor to shed some new light on how the copyright divide can be narrowed. It is structured in three parts. The first part will examine the past and future failure …

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Cosign: A Parallel Algorithm For Coordinated Traffic Signal Control, Shih-Fen Cheng, Marina A. Epelman, Robert L. Smith Dec 2006

Cosign: A Parallel Algorithm For Coordinated Traffic Signal Control, Shih-Fen Cheng, Marina A. Epelman, Robert L. Smith

Research Collection School Of Computing and Information Systems

The problem of finding optimal coordinated signal timing plans for a large number of traffic signals is a challenging problem because of the exponential growth in the number of joint timing plans that need to be explored as the network size grows. In this paper, the game-theoretic paradigm of fictitious play to iteratively search for a coordinated signal timing plan is employed, which improves a system-wide performance criterion for a traffic network. The algorithm is robustly scalable to realistic-size networks modeled with high-fidelity simulations. Results of a case study for the city of Troy, MI, where there are 75 signalized …

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On The Lower Bound Of Local Optimums In K-Means Algorithms, Zhenjie Zhang, Bing Tian Dai, Anthony K.H. Tung Dec 2006

On The Lower Bound Of Local Optimums In K-Means Algorithms, Zhenjie Zhang, Bing Tian Dai, Anthony K.H. Tung

Research Collection School Of Computing and Information Systems

No abstract provided.

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Designing Web Sites For Customer Loyalty Across Business Domains: A Multilevel Analysis, S. Mithas, Narayanasamy Ramasubbu, M. S. Krishnan, C. Fornell Dec 2006

Designing Web Sites For Customer Loyalty Across Business Domains: A Multilevel Analysis, S. Mithas, Narayanasamy Ramasubbu, M. S. Krishnan, C. Fornell

Research Collection School Of Computing and Information Systems

Web Sites are important components of Internet strategy for organizations. This paper develops a theoretical model for understanding the effect of Web site design elements on customer loyalty to a Web site. We show the relevance of the business domain of a Web site to gain a contextual understanding of relative importance of Web site design elements. We use a hierarchical linear modeling approach to model multilevel and cross-level interactions that have not been explicitly considered in previous research. By analyzing, data on more than 12,000 online customer surveys for 43 Web sites in several business domains, we find that …

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Symposium: The Role Of The Judge In The Twenty-First Century: Introduction, Eva Nilsen Dec 2006

Symposium: The Role Of The Judge In The Twenty-First Century: Introduction, Eva Nilsen

Faculty Scholarship

The contents of this special issue of the Boston University Law Review are the product of a symposium on "The Role of the Judge in the Twenty-First Century," held on April 21st and 22nd, 2006 at the Boston University School of Law. The symposium presented a rare opportunity for a distinguished group of federal judges and academics to exchange ideas about some of the most pressing and controversial subjects facing the courts. Over the course of two days, panelists explored a number of ongoing challenges to the judiciary, including threats to judicial independence, national security imperatives, exploding caseloads, increasing reliance …

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Outsiders As Innovators In The Life Sciences, Michael Dietrich Dec 2006

Outsiders As Innovators In The Life Sciences, Michael Dietrich

Dartmouth Scholarship

An introduction to the book Outsider Scientists: Routes to Innovation in Biology edited by Oren Harman and Michael Dietrich

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Current Account Balances, Financial Development And Institutions: Assaying The World “Saving Glut”, Menzie David Chinn, Hiro Ito Dec 2006

Current Account Balances, Financial Development And Institutions: Assaying The World “Saving Glut”, Menzie David Chinn, Hiro Ito

Economics Faculty Publications and Presentations

We critically assess several of the key assertions underlying the global saving glut hypothesis. First, we investigate whether the behavior of the U.S. current account behavior is anomalous in light of previous industrial country experience. Second, we determine whether East Asian current account balances are predictable using standard macroeconomic variables, augmented with institutional factors. Finally, we investigate whether higher levels of financial development in key East Asian economies would result in smaller current account surpluses. We find that a one percentage-point increase in the budget balance would increase the current account balance by 0.10 to 0.49 percentage-points for industrialized countries, …

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The Jurisdictional Heritage Of The Grand Jury Clause, Roger A. Fairfax Dec 2006

The Jurisdictional Heritage Of The Grand Jury Clause, Roger A. Fairfax

Scholarly Articles in Law Reviews & Journals

No abstract provided.

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Modulation Of Gene Expression And Dna Adduct Formation By Chlorophyllin In Human Mammary Cells Exposed To Benzopyrenes, Kaarthik John Dec 2006

Modulation Of Gene Expression And Dna Adduct Formation By Chlorophyllin In Human Mammary Cells Exposed To Benzopyrenes, Kaarthik John

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study investigated metabolic activation by benzopyrenes (BP and B[e]P) in human mammary cells and modulation by chlorophyllin (CHL, a chemopreventive agent). Among 6 NHMEC strains monitored using microarrays, 54 genes were up-regulated and 11 down-regulated by signal log ratio (SLR) ≥ 1.5 on treatment with BP alone. Pre CHL + post BP+CHL treatment up-regulated the expression of 129 genes and down-regulated those of 35 genes by SLR ≥ 1.5. Studies on CYP1 gene induction and BP-DNA adduct formation among 20 NHMECs revealed wide inter-individual variations both in the induction (3-96-fold for CYP1A1 and 4-43-fold for CYP1B1, respectively) and modulation …

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Faith, Power, And Conflict: Miner Preachers And The United Mine Workers Of America In The Harlan County Mine Wars, 1931--1939, Carletta A. Bush Dec 2006

Faith, Power, And Conflict: Miner Preachers And The United Mine Workers Of America In The Harlan County Mine Wars, 1931--1939, Carletta A. Bush

Graduate Theses, Dissertations, and Problem Reports (ETD)

Early accounts of the Harlan County mine wars place the inability of the United Mine Workers of America (UMWA) to establish a permanent foothold in the county, first at the feet of the Harlan County Coal Operators Association (HCCOA) and secondly at the worn work boots of miners who, when work was plentiful, saw little or no need for a union. The power of the HCCOA is not in question. Its members used their immense wealth and influence to build a million dollar war chest to fight the union and to maintain their iron-clad grip upon the county's political, judicial, …

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Child Distress During Immunization: The Influence Of Child And Parent Individual Difference Variables, Melissa Demore Dec 2006

Child Distress During Immunization: The Influence Of Child And Parent Individual Difference Variables, Melissa Demore

Graduate Theses, Dissertations, and Problem Reports (ETD)

Routine childhood immunization injections result child distress, which may have lasting negative effects on children, parents, and staff, and impact adherence to schedules of immunization. Aims of the current study were to (a) examine the role of child and parent individual difference variables in relation to child immunization distress, and (b) determine whether child distress predicts future immunization schedule adherence.;Parents of 50 children (aged 12--18 months) attending a visit to a pediatric medical clinic for purposes of immunization completed measures of child temperament, parent psychopathology, immunization beliefs, and prior medical distress of the child. Child distress during the immunization injection …

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Economic Evaluation Of Air Pollution Reduction Of Phase I Power Plants In West Virginia: An Output Distance Function Approach, Huilan Li Dec 2006

Economic Evaluation Of Air Pollution Reduction Of Phase I Power Plants In West Virginia: An Output Distance Function Approach, Huilan Li

Graduate Theses, Dissertations, and Problem Reports (ETD)

Air pollutants from coal-fired power plants are nonmarket environmental bads. Title IV of the 1990 Clean Air Act Amendments (CAAA) sets the stage for the dirtiest power plants to reduce emissions of SO2 and NO x in two phases. Title IV allocates plants SO2 allowances as a variation of "pollution rights" based on averaged historical emission levels and allows free-trade of allowances. This is the world's first large scale pollutant trading market. Trading allows for improved efficiency, flexibility, and reduced pollution.;This study employs the output distance function approach to evaluate the pollution reduction behavior and efficiency of West Virginia power …

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