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

Digital Commons Network™

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

2004

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 541 - 570 of 9453

Full-Text Articles in Entire DC Network

Effect Of Fe3+ Dopen Of Titanium Dioxide Film On Absorption Spectra And Photo Catalysis, Mei-Qun Xiao, Jia-Nian Shen, Moucheng Li, Peng-Fei Wu, Dong Liu, Yu-Juan Zhang Nov 2004

Effect Of Fe3+ Dopen Of Titanium Dioxide Film On Absorption Spectra And Photo Catalysis, Mei-Qun Xiao, Jia-Nian Shen, Moucheng Li, Peng-Fei Wu, Dong Liu, Yu-Juan Zhang

Journal of Electrochemistry

Photo-catalytic titanium dioxide film in nano crystalline has been prepared by electrochemical oxidation process and adding different amount of ferric ion into the electrolyte during the anodic oxidation.The effects of Fe3+ dopen on absorption spectra and photo-catalytic of the titanium dioxide films have been studied. It shows that the Fe3+ dopen caused the red shife of the absorption edge for the incoming light and exhibited the improved photocatalytic reactivity.

Go to article

Anodic Dissolution Of Aluminum In Koh-Ethanol Solutions, Hai-Bo Shao, Jian-Ming Wang, Xiao-Yan Wang, Yi Zheng, Jian-Qing Zhang Nov 2004

Anodic Dissolution Of Aluminum In Koh-Ethanol Solutions, Hai-Bo Shao, Jian-Ming Wang, Xiao-Yan Wang, Yi Zheng, Jian-Qing Zhang

Journal of Electrochemistry

The feasibility of employing aluminum in KOH ethanol solution as a battery anode system was discussed. Weight loss measurement showed that the corrosion rate of Al is low enough to be used in sealed batteries. Through the measurements done by anodic polarization, EIS and galvanostatic discharge, it was found that Al is electrochemical active in a wide potential range in this system, and its discharge mechanism is similar to that of Al in aqueous solution. The discharge potential increased rapidly after a period of time, which might be caused by the discharge products depositing on the electrode surface.

Go to article

Study On Mass Transport In Liquid Layer Adjacent To The Electrode Through Transmission Vop-Spectroellipsometry, Wei Zhu, Yu-Ru Yang, Zong-Qing Huang Nov 2004

Study On Mass Transport In Liquid Layer Adjacent To The Electrode Through Transmission Vop-Spectroellipsometry, Wei Zhu, Yu-Ru Yang, Zong-Qing Huang

Journal of Electrochemistry

In electrochemical system, the mass transport process in liquid layer adjacent to electrode is studied through theoretical analysis only.The diffusion process can be analyzed theoretically by Fick's law for homogeneous media. Up to now, none of satisfied experimental method has been reported for studying mass transport of a whole process in liquid media yet. This paper described the experimental approach to explore mass transport in electrochemical system by transmission Vop-spectroellipsometry briefly.

Go to article

Studies On The Electrochemical Preparation And Electrochemical Properties Of Conducting Polymers——Brief Introduction To The Research Work Of Electrochemistry Of Conducting Polymers In Cas Key Laboratory Of Organic Solids(I), Yong-Fang Li Nov 2004

Studies On The Electrochemical Preparation And Electrochemical Properties Of Conducting Polymers——Brief Introduction To The Research Work Of Electrochemistry Of Conducting Polymers In Cas Key Laboratory Of Organic Solids(I), Yong-Fang Li

Journal of Electrochemistry

Conducting polymers have drawn much attention since the discovery of conducting polyacetylene in 1977, due to the novelty and curiosity of their structure and properties as well as their promising applications in many aspects. Among the studies of conducting polymers, the electrochemical preparation and electrochemical properties of conducting polymers are of special importance, because the electropolymerization is a main method for preparing conducting polymer films and the electrochemical properties are the basis for their applications in the fields of electrode materials for batteries, electrocatalysis, electrochromic display, etc. We are one of the earliest research groups in the world to perform …

Go to article

Preparation And Photo-Catalyst Properties Of The α-Fe2O3-Tio2 Films On Sodium Alginate Polymer, Li-Qin Chen, Huai-Zhen Zhong, Ri-Yao Chen, Xi Zheng, Zhen Chen Nov 2004

Preparation And Photo-Catalyst Properties Of The α-Fe2O3-Tio2 Films On Sodium Alginate Polymer, Li-Qin Chen, Huai-Zhen Zhong, Ri-Yao Chen, Xi Zheng, Zhen Chen

Journal of Electrochemistry

Three new nano thin films of α-Fe2O3, TiO2 and α-Fe2O3-TiO2 by doping their powder with sodium alginate polymer were prepared. Surface structure and catalytic activities of the films were characterized by FTIR, XRD, PL, TEM and I-V techniques. The results of UV-visible absorption showed that the methylene blue was mineralized in aqueous of α-Fe2O3/SA, TiO2/SA and (α-(Fe2O3))-TiO2 /SA upon radiation with ultra violet light. α-Fe2O3 enhanced their photo-decolorized-activities by doping 15% TiO2.

Go to article

Investigation Of Pulse Potential-Modulated Coulometry For Co2 Detection, Hai-Chuan Wang, Bing-Liang Wu Nov 2004

Investigation Of Pulse Potential-Modulated Coulometry For Co2 Detection, Hai-Chuan Wang, Bing-Liang Wu

Journal of Electrochemistry

A pulse potential-modulated technique was applied to measure the concentration of CO2 in gas samples. In the first step, an anodic pulse and a consequent cathodic pulse were used to remove the organic pollutant and surface oxide on the surface of the platinized Pt gauze electrode before each experiment. As following, a given potential step was used to reduce the CO2 into adsorbed intermediate on Pt surface, and the adsorbates produced were oxidized by a following anodic potential step. At same time the oxidation current of adsorbates were measured. A certain relation exists between the concentration of CO …

Go to article

Concurrent Oh Imager And Sodiumtemperature/Wind Lidar Observation Of A Mesopause Region Undular Bore Event Over Fort Collins/Platteville, Co, C. Y. She, T. Li, B. P. Williams, Tao Yuan, R. H. Picard Nov 2004

Concurrent Oh Imager And Sodiumtemperature/Wind Lidar Observation Of A Mesopause Region Undular Bore Event Over Fort Collins/Platteville, Co, C. Y. She, T. Li, B. P. Williams, Tao Yuan, R. H. Picard

All Physics Faculty Publications

We reported the observation of a mesospheric front with the properties of an undular bore by an OH imager, over the Fort Collins/Platteville area on 6/7 October 2002. Unlike the earlier bore observations, a Na lidar capable of measuring mesopause region temperature, zonal, and meridional winds was in operation concurrently. The lidar data confirm, for the first time, the existence of a collocated temperature inversion layer to serve as the ducting region for bore propagation, as required by the simple theory proposed by Dewan and Picard 6 years ago. In addition, the lidar data in principle provide sufficient information for …

Go to article

Analysis Of Process Controls In Land Surface Hydrological Cycle Over The Continental United States, Tajdarul Hassan Syed, Venkataraman Lakshmi, Evan Paleologos, Dag Lohmann, Kenneth Mitchell, James S. Famiglietti Nov 2004

Analysis Of Process Controls In Land Surface Hydrological Cycle Over The Continental United States, Tajdarul Hassan Syed, Venkataraman Lakshmi, Evan Paleologos, Dag Lohmann, Kenneth Mitchell, James S. Famiglietti

Faculty Publications

The paper uses two years (1997–1999) of data from the North American Land Data Assimilation System at National Centers for Environmental Prediction to analyze the variability of physical variables contributing to the hydrological cycle over the conterminous United States. The five hydrological variables considered in this study are precipitation, top layer soil moisture (0–10 cm), total soil moisture (0–200 cm), runoff, and potential evaporation. There are two specific analyses carried out in this paper. In the first case the principal components of the hydrological cycle are examined with respect to the loadings of the individual variables. This helps to ascertain …

Go to article

Volume 42, Number 14: November 26, 2004, University Of North Dakota Nov 2004

Volume 42, Number 14: November 26, 2004, University Of North Dakota

University Letter Archive

No abstract provided.

Go to article

Search For Doubly Charged Higgs Bosons Decaying To Dileptons In Pp̅ Collisions At √S =1:96 Tev, Darin Acosta, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration Nov 2004

Search For Doubly Charged Higgs Bosons Decaying To Dileptons In Pp̅ Collisions At √S =1:96 Tev, Darin Acosta, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration

Kenneth Bloom Publications

We present the results of a search for doubly charged Higgs bosons (H±±) decaying to dileptons (ll′ ) using ≈240 pb-1 of pp̅ collision data collected by the CDF II experiment at the Fermilab Tevatron. In our search region, given by same-sign ll′ mass mll′ >80 GeV/c2 (100 GeV/c2 for ee channel), we observe no evidence for H±± production. We set limits on σ (pp̅→ H++H--→l+l+l-l-) as a function of the mass of the H±± …

Go to article

November 24, 2004 Cal Poly Report, Public Affairs Office Nov 2004

November 24, 2004 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

Go to article

Survival Analysis Using Auxiliary Variables Via Nonparametric Multiple Imputation, Chiu-Hsieh Hsu, Jeremy Taylor, Susan Murray, Daniel Commenges Nov 2004

Survival Analysis Using Auxiliary Variables Via Nonparametric Multiple Imputation, Chiu-Hsieh Hsu, Jeremy Taylor, Susan Murray, Daniel Commenges

The University of Michigan Department of Biostatistics Working Paper Series

We develop an approach, based on multiple imputation, that estimates the marginal survival distribution in survival analysis using auxiliary variable to recover information for censored observations. To conduct the imputation, we use two working survival model to define the nearest neighbor imputing risk set. One model is for the event times and the other for the censoring times. Based on the imputing risk set, two nonparametric multiple imputation methods are considered: risk set imputation, and Kaplan-Meier estimator. For both methods a future event or censoring time is imputed for each censored observation. With a categorical auxiliary variable, we show that …

Go to article

A Bayesian Mixture Model Relating Dose To Critical Organs And Functional Complication In 3d Conformal Radiation Therapy, Tim Johnson, Jeremy Taylor, Randall K. Ten Haken, Avraham Eisbruch Nov 2004

A Bayesian Mixture Model Relating Dose To Critical Organs And Functional Complication In 3d Conformal Radiation Therapy, Tim Johnson, Jeremy Taylor, Randall K. Ten Haken, Avraham Eisbruch

The University of Michigan Department of Biostatistics Working Paper Series

A goal of radiation therapy is to deliver maximum dose to the target tumor while minimizing complications due to irradiation of critical organs. Technological advances in 3D conformal radiation therapy has allowed great strides in realizing this goal, however complications may still arise. Critical organs may be adjacent to tumors or in the path of the radiation beam. Several mathematical models have been proposed that describe a relationship between dose and observed functional complication, however only a few published studies have successfully fit these models to data using modern statistical methods which make efficient use of the data. One complication …

Go to article

November 24, 2004 Cal Poly Report, Public Affairs Office Nov 2004

November 24, 2004 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

Go to article

Kalman Consensus Strategies And Their Application To Cooperative Control, Randal Beard, Derek Kingston, Wei Ren Nov 2004

Kalman Consensus Strategies And Their Application To Cooperative Control, Randal Beard, Derek Kingston, Wei Ren

Faculty Publications

Sponsorship: AFOSR, NSF. In this paper, we propose discrete-time and continuous-time consensus update schemes motivated by the discrete-time and continuous-time Kalman filters. With certainty information encoded into each agent, the proposed consensus schemes explicitly account for relative confidence in the information that is communicated from each agent in the team. We show mild sufficient conditions under which consensus can be achieved using the proposed schemes in the presence of switching interaction topologies. The Kalman consensus scheme is shown to be input-to-state stable. We show how to exploit this fact in multi-agent cooperative control scenarios.

Go to article

Absorption, Distribution, And Excretion Of [14C]-3-Chloro-4 Methylaniline Hydrochloride In Two Species Of Birds Following A Single Oral Dose, David A. Goldade, John D. Tessari, John J. Johnston Nov 2004

Absorption, Distribution, And Excretion Of [14C]-3-Chloro-4 Methylaniline Hydrochloride In Two Species Of Birds Following A Single Oral Dose, David A. Goldade, John D. Tessari, John J. Johnston

United States Department of Agriculture Wildlife Services: Staff Publications

Ring-labeled [14C]-3-chloro-4-methylaniline hydrochloride (250 μg per bird) was delivered to 21 red-winged blackbirds (Agelaius phoeniceus) and 21 dark-eyed juncos (Junco hyemalis) via oral gavage, and the distribution and excretion of radioactivity were determined at 15 and 30 min and 1, 4, 8, 12, and 24 h (n = 3 per time point). Direct measurement of radioactivity as well as measurement following combustion was accomplished using a liquid scintillation counter. Elimination from most tissues followed a two-compartment model, with very rapid elimination occurring between time 0 and 4 h and a much slower elimination …

Go to article

Development Of Pole Impact Testing At Multiple Vehicle Side Locations As Applied To The Ford Taurus Structural Platform, Mark Halford Warner Nov 2004

Development Of Pole Impact Testing At Multiple Vehicle Side Locations As Applied To The Ford Taurus Structural Platform, Mark Halford Warner

Theses and Dissertations

A test method was developed whereby repeated pole impacts could be performed at multiple locations per test vehicle, allowing a comparison of energy and crush relationships. Testing was performed on vehicles moving laterally into a 12.75 inch diameter rigid pole barrier. Crush energy absorption characteristics at the different locations were analyzed, and the results compared to test data from broad moving barrier crashes and available crash tests with similar pole impacts. The research documents the crush stiffness characteristics for narrow impacts at various points on the side of the Taurus vehicle platform. Factors encountered during the research include the importance …

Go to article

How Well Can People Use Different Color Attributes?, Hongqin Zhang, Ethan Montag Nov 2004

How Well Can People Use Different Color Attributes?, Hongqin Zhang, Ethan Montag

Articles

Two psychophysical experiments were conducted to analyze the role of color attributes in simple tasks involving color matching and discrimination. In Experiment I observers made color matches using three different adjustment control methods. The results showed that the Lightness, Chroma, Hue (LCH) and the Lightness, redness/greenness, blueness/yellowness ({L, r/g, y/b}) adjustment controls elicited significantly better performance than the display RGB controls in terms of both accuracy and time, but were not significantly different from each other. Expert observers performed significantly better than naive observers in terms of accuracy. Experiment II was a replication and extension of Melgosa, et al.’s experiment …

Go to article

Vol. 55, No. 8, November 23, 2004, University Of Michigan Law School Nov 2004

Vol. 55, No. 8, November 23, 2004, University Of Michigan Law School

Res Gestae

•Scalia Visit Brings Attention, Constitutional Debate to M-Law •Editorial: Urine Trouble •Too 'Legit': Chomsky Rocks Hutchins •Scalia Faces Student Questions, Reactions •No Monopoly on Closed Mindedness •Actual Useful Information: Exam-Taking Tips from Profs, Students •Eating Crow: A Messy Situation •From the Bookshelf: Recommended Reading for Winter Break •Jenny Runkles Photos •Music Attorney Lays Down Laws of Rock •The Reason for the Season: Things to be Thankful for in the State of Hutchins •Why a Nation No Longer United? •Treat Your Last Like Your First: Recapture the First Semester Magic •Crossword •Question on the Quad

Go to article

Ucc Minutes November 23, 2004, Kutztown University Curriculum Committee Nov 2004

Ucc Minutes November 23, 2004, Kutztown University Curriculum Committee

UCC Minutes

No abstract provided.

Go to article

Closing The Racial Achievement Gap: The Role Of Reforming Instructional Practices, Harold Wenglinsky Nov 2004

Closing The Racial Achievement Gap: The Role Of Reforming Instructional Practices, Harold Wenglinsky

Education Policy Analysis Archives (EPAA)

No Child Left Behind calls for schools to close the achievement gap between races in math and reading. One possible way for schools to do so is to encourage their teachers to engage in practices that disproportionately benefit their minority students. The current study applies the technique of Hierarchical Linear Modeling to a nationally representative sample of 13,000 fourth graders who took the 2000 National Assessment of Educational Progress in mathematics to identify instructional practices that reduce the achievement gap. It finds that, even when taking student background into account, various instructional practices can make a substantial difference.

Go to article

Education Policy Analysis Archives 12/64 , Arizona State University, University Of South Florida Nov 2004

Education Policy Analysis Archives 12/64 , Arizona State University, University Of South Florida

College of Education Publications

Closing the racial achievement gap : the role of reforming instructional practices / Harold Wenglinsky.

Go to article

The Weekly Challenger, November 23, 2004, The Weekly Challenger, Et Al Nov 2004

The Weekly Challenger, November 23, 2004, The Weekly Challenger, Et Al

Weekly Challenger Newspaper Collection

The November 23, 2004, issue of The Weekly Challenger.

Go to article

Automating The Extraction Of Domain-Specific Information From The Web-A Case Study For The Genealogical Domain, Troy L. Walker Nov 2004

Automating The Extraction Of Domain-Specific Information From The Web-A Case Study For The Genealogical Domain, Troy L. Walker

Theses and Dissertations

Current ways of finding genealogical information within the millions of pages on the Web are inadequate. In an effort to help genealogical researchers find desired information more quickly, we have developed GeneTIQS, a Genealogy Target-based Information Query System. GeneTIQS builds on ontology-based methods of data extraction to allow database-style queries on the Web. This thesis makes two main contributions to GeneTIQS. (1) It builds a framework to do generic ontology-based data extraction. (2) It develops a hybrid record separator based on Vector Space Modeling that uses both formatting clues and data clues to split pages into component records. The record …

Go to article

Polarimetric Temperature Sensor Using Core-Replaced Fiber, Benjamin L. Ipson Nov 2004

Polarimetric Temperature Sensor Using Core-Replaced Fiber, Benjamin L. Ipson

Theses and Dissertations

Optical fibers are increasingly being used to create sensing devices. The D-fiber has an elliptical core and exhibits birefringence. This birefringence can be used to create a polarimetric sensor. The elliptical core supports two orthogonal modes that have separate effective indices of refraction. The indices of refraction change with a change in temperature. Since the effective indices of refraction change differently for the two modes, the birefringence also changes. This change in birefringence can be seen as a change in detected power through the fiber through the use of polarizers. The fiber then becomes a temperature sensor. The sensitivity of …

Go to article

Lanthorn, Vol. 39, No. 15, November 23, 2004, Grand Valley State University Nov 2004

Lanthorn, Vol. 39, No. 15, November 23, 2004, Grand Valley State University

Volume 39, July 15, 2004 - June 16, 2005

Lanthorn is Grand Valley State's student newspaper, published from 1968 to the present.

Go to article

Measurements Of Transverse Energy Distributions In Au+Au Collisions At √SNn=200 Gev, Star Collaboration, T.D. Gutierrez Nov 2004

Measurements Of Transverse Energy Distributions In Au+Au Collisions At √SNn=200 Gev, Star Collaboration, T.D. Gutierrez

Physics

Transverse energy (ET) distributions have been measured for Au+Au collisions at √sNN=200GeV by the STAR Collaboration at RHIC. ET is constructed from its hadronic and electromagnetic components, which have been measured separately. ET production for the most central collisions is well described by several theoretical models whose common feature is large energy density achieved early in the fireball evolution. The magnitude and centrality dependence of ET per charged particle agrees well with measurements at lower collision energy, indicating that the growth in ET for larger collision energy results from the growth in …

Go to article

Target-Dominant Chinese-English Machine Translation, Dan Su Nov 2004

Target-Dominant Chinese-English Machine Translation, Dan Su

Theses and Dissertations

Information exchange is increasing rapidly with the advent of globalization. As the language spoken by the most people in today's world, Chinese will play an important role in information exchange in the future. Therefore, we need an efficient and practical means to access the increasingly large volume of Chinese data. This thesis describes a target-dominant Chinese-English machine translation system, which can translate a given Chinese news sentence into English. We conjecture that we can improve the state of the art of MT using a TDMT approach. This system has participated in the NIST (National Institute of Standards and Technology) 2004 …

Go to article

The Effectiveness Of Computer-Based Tutorials In Learning Computer-Aided Design Methods For Tool Design Procedures, Andrew Moroni Hall Nov 2004

The Effectiveness Of Computer-Based Tutorials In Learning Computer-Aided Design Methods For Tool Design Procedures, Andrew Moroni Hall

Theses and Dissertations

Throughout the past twenty-five years the process of designing and manufacturing a product has been revolutionized by the integration of Computer Aided Design (CAD). Although three-dimensional solid modeling, or 3-D CAD offers a better representation of the product in a virtual environment, it can be complicated and difficult to learn. Tutorials have been developed to assist manufacturing tool design student in the learning of 3-D CAD principles as they apply to tool design. This study seeks to test the effectiveness of those tutorials. A BYU tool design class was divided into two groups according to their assigned laboratory time. The …

Go to article

Sr-04-05-(07) 64 Cc, Marshall University Nov 2004

Sr-04-05-(07) 64 Cc, Marshall University

Recommendations

No abstract provided.

Go to article

First Prev Next Last