Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2009

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 1561 - 1590 of 14009

Full-Text Articles in Entire DC Network

Impact Of High-Order Surface Plasmon Modes Of Metal Nanoparticles On Enhancement Of Optical Emission, Greg Sun, Jacob B. Khurgin, C. C. Yang Oct 2009

Impact Of High-Order Surface Plasmon Modes Of Metal Nanoparticles On Enhancement Of Optical Emission, Greg Sun, Jacob B. Khurgin, C. C. Yang

Physics Faculty Publications

We consider the impact of high-order surface plasmon modes supported by the metal nanoparticles on the efficiency enhancement of optical emission. Using the example of Au nanosphere embedded in the GaN dielectric, we show that for an emitter with certain original radiative efficiency, placing the emitter too close to the metal sphere does not always produce additional enhancement. Thus our model provides analytical treatment of the luminescence quenching and can be used to optimize both nanoparticle size and its separation from the emitter to yield maximum enhancement.

Go to article

Professor Len Keeler Receives $130,000 National Science Foundation Grant, University Relations Oct 2009

Professor Len Keeler Receives $130,000 National Science Foundation Grant, University Relations

Campus News Archive

The physics professor is developing a new way to measure and to interpret the behavior of highly excited atoms.

Go to article

Spartan Daily October 27, 2009, San Jose State University, School Of Journalism And Mass Communications Oct 2009

Spartan Daily October 27, 2009, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily (School of Journalism and Mass Communications)

Volume 133, Issue 30

Go to article

On The Construct Validity Of Stereotype Threat Measures: Some Possible Boundary Conditions, Andrea Jane Marsden Oct 2009

On The Construct Validity Of Stereotype Threat Measures: Some Possible Boundary Conditions, Andrea Jane Marsden

Dissertations

Since 1995, much research has focused on the negative effects that stereotype threat (ST) may have on task and test performance (e.g., Nguyen & Ryan, 2008). To date, however, no research has examined the underlying meaning of this construct in a manner precise enough to determine if it is indeed a unique and meaningful concept and any potential boundaries. Therefore, the main goal of the current research was to obtain a better understanding of what distinctions, if any, exist between ST and similar constructs. Using a factorial design and examining correlations among variables, measures of ST were compared to measures …

Go to article

Hotline Press Newspaper- October 27,2009 Vol 27 No 20, Hotline Press Newspaper Oct 2009

Hotline Press Newspaper- October 27,2009 Vol 27 No 20, Hotline Press Newspaper

Hotline Press Newspaper 2009

No abstract provided.

Go to article

Stimulus Reconstruction From The Biphasic Integrate-And-Fire Sampler, Alexander Singh Alvarado, José C. Príncipe, John G. Harris Oct 2009

Stimulus Reconstruction From The Biphasic Integrate-And-Fire Sampler, Alexander Singh Alvarado, José C. Príncipe, John G. Harris

Electrical and Computer Engineering Faculty Research & Creative Works

An algorithm to recover the encoded stimulus from a biphasic integrate-and-fire model has been proposed using the sampling framework for local averages. The algorithm converges for sparse sampling sets, common in extracellular neural recordings. Moreover, the spike region can be recovered with up to 50 dB accuracy even though the instantaneous and overall pulse rates are below the Nyquist bound. ©2009 IEEE.

Go to article

The Current Volume 20 : Issue 11, Nova Southeastern University Oct 2009

The Current Volume 20 : Issue 11, Nova Southeastern University

Student Newspapers

No abstract provided.

Go to article

Intelligent Redesign: A Collaborative Approach To “Scientific Thinking”, Brandon Canfield Oct 2009

Intelligent Redesign: A Collaborative Approach To “Scientific Thinking”, Brandon Canfield

Faculty Journal Articles

As a multi-section Core Curriculum course required for all undergraduates of AUC, Scientific Thinking (SCI120) provides unique insight on a variety of issues faced throughout the liberal arts educational system. Scientific Thinking, part of the “Core of the Core,” is a course that many students may not choose to take. While AUC is known here and abroad as the region's premier English-language institution of higher learning, many students enter without a full appreciation for how or why that elite status depends on the liberal arts component of the education that is being offered. The instructors for this course are a …

Go to article

Targeting Transfer In A Stellar Pbl Course For Pre-Service Teachers, Cindy E. Hmelo-Silver, Sharon J. Derry, Alan Bitterman, Natalie Hatrak Oct 2009

Targeting Transfer In A Stellar Pbl Course For Pre-Service Teachers, Cindy E. Hmelo-Silver, Sharon J. Derry, Alan Bitterman, Natalie Hatrak

Interdisciplinary Journal of Problem-Based Learning

Helping students in the professions apply conceptual ideas to the problems of practice is a key goal of problem-based learning (PBL). Because PBL is organized around small, collaborative groups, scaling up PBL to large, heterogeneous classes poses significant challenges for implementation. This study presents a hybrid model that mixes online and face-to-face PBL. The STELLAR system was developed to support online and hybrid PBL courses for pre-service teachers. It allows PBL to be implemented in larger classes because its scaffolding capabilities allow a small number of facilitators to distribute their attention among multiple small groups. In a quasi-experimental study, we …

Go to article

Evaluating Connectivity Between Marine Protected Areas Using Codar High-Frequency Radar, Brian Zelenke, Mark A. Moline, Burt H. Jones, Steven R. Ramp, Greg B. Crawford, John L. Largier, Eric J. Terrill, Newell Garfield Iii, Jeffrey D. Paduan, Libe Washburn Oct 2009

Evaluating Connectivity Between Marine Protected Areas Using Codar High-Frequency Radar, Brian Zelenke, Mark A. Moline, Burt H. Jones, Steven R. Ramp, Greg B. Crawford, John L. Largier, Eric J. Terrill, Newell Garfield Iii, Jeffrey D. Paduan, Libe Washburn

Biological Sciences

To investigate the connectivity between central California marine protected areas (MPAs), back-projections were calculated using the network of high-frequency (HF) radar ocean surface current mapping stations operated along the California coast by the member institutions of the Coastal Ocean Currents Monitoring Program with funding provided by California voters through Propositions 40 & 50 and administered by the State Coastal Conservancy. Trajectories of 1 km resolution grids of water particles were back-projected from ten MPAs each hour, out through 40 days in the past, from each day in 2008, producing a map of where surface waters travel over a 40-day period …

Go to article

A Cisco-Based Proposal For Arne Core Routing Infrastructure, Ingrimar James Oct 2009

A Cisco-Based Proposal For Arne Core Routing Infrastructure, Ingrimar James

Regis University Student Publications (comprehensive collection)

Systems Engineering and Application Development (SEAD) Practicum provides opportunities for students to engage in proposing, designing, building and testing various projects related to information technology. There are several ongoing projects designed to upgrade, improve or revamp some aspect of the Academic Research Network, generally referred to as ARNe, and services or applications that are a part of its architecture. Regis University is in the process of replacing their current architecture and equipment that forms the core of ARNe in order to facilitate further upgrades and new projects within various aspects of ARNe. This paper examines and proposes a Cisco-based routing …

Go to article

Teaching Online Courses For High School Mathematics Teachers, Maurice Burke Oct 2009

Teaching Online Courses For High School Mathematics Teachers, Maurice Burke

Colloquia of the Department of Mathematical Sciences

Burke will present data concerning online courses at MSU and elsewhere in the Montana University System. He will discuss the problems with interpreting the data as well as some special issues related to teaching mathematics in the online environment. He will share information about the online components of the Masters in Mathematics - Mathematics Education Option (MSMME) offered at MSU. This talk will be informal and time for questions and discussions will be allowed.

Go to article

Breaking From Tradition: India And The Path To Development, Angel M. Newsom Oct 2009

Breaking From Tradition: India And The Path To Development, Angel M. Newsom

Regis University Student Publications (comprehensive collection)

"How could a country with more than 300 million illiterate people also have the kind of scientific human resources that bring some of the world's largest corporations to base their R&D labs in India?" (Tripathi, 2007, p.68). This question acknowledges the coexistence of two vastly different worlds within one country. On one hand, India is making significant progress on the path to becoming a developed country;one that can provide the basic fundamentals of living for its citizens while sustaining progressive economic growth; on the other hand, it must overcome challenges to this goal that relate to a crumbling infrastructure, poverty, …

Go to article

3d Reconstruction And Visualization Of A Hovering Dragonfly, Christopher Koehler, Thomas Wischgoll, Haibo Dong, Zachary Gaston, Hui Wan Oct 2009

3d Reconstruction And Visualization Of A Hovering Dragonfly, Christopher Koehler, Thomas Wischgoll, Haibo Dong, Zachary Gaston, Hui Wan

Computer Science and Engineering Faculty Publications

No abstract provided.

Go to article

Placeholders: Engaging The Hayekian Critique Of Financial Regulation, Annelise Riles Oct 2009

Placeholders: Engaging The Hayekian Critique Of Financial Regulation, Annelise Riles

Cornell Law Faculty Working Papers

Since Friedrich Hayek, debates about the proper relationship between the state and the market, and about the optimal design of regulatory institutions, often turn on assumptions about the workings of legal expertise — and in particular about the difference between public expertise (bureaucratic knowledge) and private expertise (private law). Hayek’s central argument, adopted uncritically by a wide array of policy-makers and academics across the political spectrum, is a temporal one: bureaucratic reasoning is inherently one step behind the market, and hence effective market planning is impossible. In contrast, Hayek argues, private ordering is superior because it is of the moment, …

Go to article

An Approximation Approach To Eigenvalue Intervals For Singular Boundary Value Problems With Sign Changing And Superlinear Nonlinearities, Haishen Lu, Ravi P. Agarwal, Donal O'Regan Oct 2009

An Approximation Approach To Eigenvalue Intervals For Singular Boundary Value Problems With Sign Changing And Superlinear Nonlinearities, Haishen Lu, Ravi P. Agarwal, Donal O'Regan

Mathematics and System Engineering Faculty Publications

This paper studies the eigenvalue interval for the singular boundary value problem u″ = g (t, u) + λ h (t, u), t ∈(0, 1),u (0) = 0 = u (1), where g + h may be singular at u = 0, t = 0, 1, and may change sign and be superlinear at u = + ∞. The approach is based on an approximation method together with the theory of upper and lower solutions. Copyright © 2009 Haishen Lü et al.

Go to article

The Collegian (2009-10-26), Julianna Sosa Oct 2009

The Collegian (2009-10-26), Julianna Sosa

UTB/TSC Archives - The Collegian [Newspaper]

Vol. 62, No. 10

Go to article

Central Florida Future, Vol. 41 No. 83, October 26, 2009 Oct 2009

Central Florida Future, Vol. 41 No. 83, October 26, 2009

Central Florida Future

Walking barefoot for poverty; Festival of lights; Man vs. Wild host comes to Florida; Theatre students alternate two sold-out productions; First green complex at UCF.

Go to article

Wavepacket Approach To The Cumulative Reaction Probability Within The Flux Operator Formalism, Sophya Garashchuk, Tijo Vazhappilly Oct 2009

Wavepacket Approach To The Cumulative Reaction Probability Within The Flux Operator Formalism, Sophya Garashchuk, Tijo Vazhappilly

Faculty Publications

Expressions for the singular flux operator eigenfunctions and eigenvalues are given in terms of the Dirac δ-function representable as a localized Gaussian wavepacket. This functional form enables computation of the cumulative reaction probability N(E) from the wavepacket time-correlation functions. The Gaussian based form of the flux eigenfunctions, which is not tied to a finite basis of a quantum-mechanical calculation, is particularly useful for approximate calculation of N(E) with the trajectory based wavepacket propagation techniques. Numerical illustration is given for the Eckart barrier using the conventional quantum-mechanical propagation and the quantum trajectory dynamics with the approximate quantum potential. N(E) converges with …

Go to article

Grand Valley Forum, Volume 034, Number 09, October 26, 2009, Grand Valley State University Oct 2009

Grand Valley Forum, Volume 034, Number 09, October 26, 2009, Grand Valley State University

2009-2010, Volume 34

Grand Valley Forum is Grand Valley State's faculty and staff newsletter, published from 1976 to the present.

Go to article

A Survey Of The Semantic Specification Of Sensors, Michael Compton, Cory Andrew Henson, Laurent Lefort, Holger Neuhaus, Amit P. Sheth Oct 2009

A Survey Of The Semantic Specification Of Sensors, Michael Compton, Cory Andrew Henson, Laurent Lefort, Holger Neuhaus, Amit P. Sheth

Kno.e.sis Publications

Semantic sensor networks use declarative descriptions of sensors promote reuse and integration, and to help solve the difficulties of installing, querying and maintaining complex, heterogeneous sensor networks. This paper reviews the state of the art for the semantic specification of sensors, one of the fundamental technologies in the semantic sensor network vision. Twelve sensor ontologies are reviewed and analysed for the range and expressive power of their concepts. The reasoning and search technology developed in conjunction with these ontologies is also reviewed, as is technology for annotating OGC standards with links to ontologies. Sensor concepts that cannot be expressed accurately …

Go to article

The Accounting At A Tipping Point – Decline Or Renewal, Susan Haka Oct 2009

The Accounting At A Tipping Point – Decline Or Renewal, Susan Haka

Publications and Research

No abstract provided.

Go to article

Continuous Phase Amplification With A Sagnac Interferometer, David J. Starling, P. Ben Dixon, Nathan S. Williams, Andrew N. Jordan, John C. Howell Oct 2009

Continuous Phase Amplification With A Sagnac Interferometer, David J. Starling, P. Ben Dixon, Nathan S. Williams, Andrew N. Jordan, John C. Howell

Mathematics, Physics, and Computer Science Faculty Articles and Research

We describe a phase-amplification technique using a Sagnac interferometer. We monitor the relative phase between two paths of a precisely misaligned interferometer by measuring the average position of a split-Gaussian mode in the dark port. Although we monitor only the dark port, we show that the signal varies linearly with phase and that we can obtain similar sensitivity to balanced homodyne detection. We derive the source of the amplification using classical wave optics.

Go to article

Low Power Integrate And Fire Circuit For Data Conversion, Manu Rastogi, Vaibhav Garg, John G. Harris Oct 2009

Low Power Integrate And Fire Circuit For Data Conversion, Manu Rastogi, Vaibhav Garg, John G. Harris

Electrical and Computer Engineering Faculty Research & Creative Works

We have developed an adaptively biased Integrate and Fire (I&F) circuit to reduce the power consumption of our ADC replacement approach. Unlike conventional circuits this I&F consumes no standby power. Power consumed is input signal dependent and increases exponentially as the input approaches the set threshold value. We describe the circuit model and present an intuitive as well as mathematical model for the power savings. Results from the chip fabricated in AMI 0.6 μm technology are also presented. ©2009 IEEE.

Go to article

University Of Northern Iowa Faculty Senate Meeting Agenda, October 26, 2009, University Of Northern Iowa. Faculty Senate. Oct 2009

University Of Northern Iowa Faculty Senate Meeting Agenda, October 26, 2009, University Of Northern Iowa. Faculty Senate.

Documents - Faculty Senate

Meeting agenda from the Faculty Senate of the University of Northern Iowa.

Go to article

Human Health Risk To Ultrafine Particles In Jakarta, Budi Haryanto Oct 2009

Human Health Risk To Ultrafine Particles In Jakarta, Budi Haryanto

Kesmas

Perhatian terhadap pencemaran udara ini menjadi semakin meningkat ketika banyak diketemukan dampaknya pada anak-anak, terutama kaitannya dengan insidens dan prevalens asma. Sumber utama pencemaran udara di Jakarta adalah dari kendaraan bermotor dan industri, dimana transportasi berkontribusi terhadap 71% NOX, 15% SO 2, dan 70% partikel debu kurang dari 10 mikronmeter (PM 10). Tujuan penelitian mengetahui jumlah partikel debu berdiameter ultrafine (partikel berukuran <0,1 mm) yang terhirup oleh anak sekolah dasar, pekerja pengguna kendaraan pribadi dan kendaraan umum. Studi ini menggunakan desain crosssectional dan dilakukan di Jakarta tahun 2005. Sebanyak 30 responden anak sekolah dasar, pekerja pengguna kendaraan pribadi dan kendaraan umum dipilih secara purposif sebagai subyek penelitian. Jumlah partikel ultrafine terhirup secara individu diukur selama 3 x 24 jam menggunakan Condensation Particle Counter (CPC) real time personal exposure measurement (jumlah ultrafine partikel per cm 3). Rerata konsentrasi partikel ultrafine terhirup pada anak sekolah dasar di rumah, di perjalanan, dan di sekolah adalah berurutan sebagai berikut: 29.254/cm 3, 147.897/cm 3 dan 61.033/cm 3. Pada pekerja pengguna kendaraan pribadi di rumah, di perjalanan, dan di kantor diperoleh rerata konsentrasi secara berurutan sebagai berikut: 29.213/cm 3, 310.179/cm 3 dan 42.496/cm 3. Sedangkan pada pekerja pengguna kendaraan umum adalah: 35.332/cm 3 di rumah, 453.547/cm 3 di perjalanan, dan 69.867/cm 3 di kantor. In Jakarta, the main pollution sources are vehicles and industry, with motorized traffic accounting for 71% of the oxides of nitrogen (NOX), 15% of sulphur-dioxide (SO2), and 70% of particulate matter (PM 10 ) of the total emission load. Both urban population size and the fraction of the population that owns a private vehicle are increasing. The study objective is to determine the numbers of ultrafine particulate matter with an aerodynamic diameter of 0.1 mm or less, or PM0.1 inhaled by elementary school children, commute workers with private car and commute workers with public transport. A cross-sectional study design is implemented in Jakarta 2005. Ten elementary school children, ten commuters with private car and ten commuters with public transports are purposively selected as subjects and measured personally for 3 x 24 hours using Condensation Particle Counter (CPC) real-time personal exposure measurement (measured in terms of the number of particles per cubic centimeter, or # cm-3). The average concentration of ultrafine particulate matter of elementary school children at home, on the road and at school is 29,254/cm3, 147,897/cm3 and 61,033/cm3 respectively. For those commuters with private car at home, on the road and at office is 29,213/cm3, 310,179/cm3 and 42,496/cm3 respectively. For those commuters with public transport, the concentration average of at home, on the road and at office is found higher: 35,332/cm3, 453,547/cm3, and 69,867/cm3, respectively.

Go to article

Analisis Data Riskesdas 2007/2008: Kontribusi Karakteristik Ibu Terhadap Status Imunisasi Anak Di Indonesia, Sutanto Priyo Hastono Oct 2009

Analisis Data Riskesdas 2007/2008: Kontribusi Karakteristik Ibu Terhadap Status Imunisasi Anak Di Indonesia, Sutanto Priyo Hastono

Kesmas

Cakupan imunisasi terbukti dapat menurunkan secara signifikan kejadian kesakitan dan kematian yang diakibatkan penyakit tersebut, tetapi di Indonesia cakupan tersebut tergolong rendah. Tujuan penelitian adalah mengetahui hubungan karakteristik ibu dengan status imunisasi anak di Indonesia. Disain yang digunakan dalam penelitian adalah potong lintang dengan sampel anak yang berumur antara 1-2 tahun yang tinggal di wilayah Indonesia. Sumber data sekunder yang digunakan adalah Riskesdas Depkes tahun 2007/2008. Proporsi anak usia 12-24 bulan yang mendapat imunisasi lengkap adalah 56,2 % (95% CI :55,1-57,3). Pendidikan ibu dan pendidikan suami ditemukan berhubungan secara bermakna dengan status imunisasi dasar pada anak. Hasil analisis multilevel menemukan …

Go to article

Undergraduate Engineering Students' Understanding Of Heat, Temperature, And Radiation, Katharyn E.K. Nottis, Michael Prince, Margot Vigeant, Sarah Nelson, Kathryn Hartsock Oct 2009

Undergraduate Engineering Students' Understanding Of Heat, Temperature, And Radiation, Katharyn E.K. Nottis, Michael Prince, Margot Vigeant, Sarah Nelson, Kathryn Hartsock

NERA Conference Proceedings 2009

Difficulty understanding heat and temperature concepts has been recognized in engineering education. Confusion has been shown to persist after instruction. The purpose of this study was to determine whether undergraduate engineering students’ knowledge of four heat transfer concept areas significantly changed with instruction and whether this varied by major and GPA. Two hundred twenty-eight undergraduate engineering students from six institutions were assessed prior to and after instruction. Results showed significant improvement in most concept areas but mean scores were below mastery. Previously documented misconceptions persisted after instruction. Significant differences were found by major and GPA. Suggestions for future research provided.

Go to article

New Music For Viola And Electronics, Christophe Desjardins Oct 2009

New Music For Viola And Electronics, Christophe Desjardins

Printed Performance Programs (PDF Format)

No abstract provided.

Go to article

Conclusion: Making Learning Visible - A Cyclical Process, Karen V. Busch Oct 2009

Conclusion: Making Learning Visible - A Cyclical Process, Karen V. Busch

The Scholarship of Teaching and Learning at EMU

No abstract provided.

Go to article

First Prev Next Last