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Analyses On Spm Images And Theoretical Investigations On Oxygen Vacancy Concentration Of Light-Induced Nanostructured Titania Super Hydrophilic Films, Ren-Jie Zeng, Zhong-Hua Lin, Zhi-Min Fang

Journal of Electrochemistry

A typical nanostructured titania super hydrophilic film was chosen for general char2 acterization employing a Scanning Probe Microscope (SPM) and an electrochemical measurement system. Following from the principles of the solid state chemistry and nanomechanics, intensive theoretical. analyses on the SPM images, the oxygen vacancy concentration sand the mechanism of the super hydrophilicity were made; further illuminationsona reactionequation of titania defect formation, a tentative universal surface physical mode for the wet-ability, a concept, amphiphobic-ity, and surface design were carried out after the author’ sprevious introduction and proposal in the end of 1999.

The Research Of Organic Electrolyte Solutions For Li-Ion Batteries, Quang-Chao Zhuang, Shan Wu, Wen-Yuan Liu, Zhao-Da Lu

Journal of Electrochemistry

The characteristics of organic electrolyte solutions and its influences on the ion conductivity are summarized. The chemistry and electrochemistry of organic electrolyte solutions and characteristics of ordinary organic solvents are introduced. Progresses in studies of organic electrolyte solutions such as electrolyte salts, organic solvents, additives in recent years are reviewed, current situation of the studies of organic electrolyte solutions were also discussed.

New Progress Of Intrinsic Conducting Polymers' Application, Wan Chen, Cheng-Hao Liang, Yang Xie

Journal of Electrochemistry

As a kind of functional polymer, the intrinsic conducting polymer has the special chemical, electrochemical and optical properties. So it has wide application such as batteries, electromagnetic wave shielding, electroluminescent etc. Recent development and the problems of the intrinsic conducting polymers' application were briefly reviewed in this paper.

Thermal Effects On The Measurement Of Photocurrent At Anodic Films On Silver Electrode, Yuan Gu, Zhi-Yu Jiang

Journal of Electrochemistry

The influence of heat on the photocurrent of Ag electrde in alkaline solution was investigated by measuring photocurrent, photothermal signal and thermal current under the irraiation of laser beams with the wavelengths of 488 nm and 532 nm. It was found the photocurrent atthe Ag₂O film was influenced by the temperature change at the electrode surface under the irradiation of light. During the electrochemical transfer between Ag, Ag₂O and AgO in the anodic filmthe surface temperature changed obviously due to the different absprptance of the surface subrstances.It was suggested by comparing the voltammograms, photocurrent curves and …

Study Of Hydrogen Diffusion Behavior In Hydrogen Storage Alloy Mlni3.75Co0.65Mn0.4Al0.2 With Potential Step Method, Xian-Xia Yuan, Nai-Xin Xu

Journal of Electrochemistry

Potential step method was employed to study the hydrogen diffusion behavior in hydrogen storage alloy MlNi_3.75 Co_0.65Mn_0.4Al_0.2 with various depth of discharge (DOD) at ambient temperature and with 50% DOD at various temperatures. It was found that hydrogen diffusion cofficient in the hydrogen storage alloy increaes with the increase in DOD at ambient temperature. and for the alloy with 50% DOD, the hydrogen diffusion coefficient increases with the increase in temperature and the activation energy for hydrogen diffusion in the alloy is 19.87 kJ/mol.

Study Of Electrochemistry Of Aloe-Emodin And Determination Of It With 1.5th Order Derivative Anodic Stripping Voltammetry, Xin-Hua Lin, Li-Ying Huang, Wei Chen, Hong-Bin Luo, Bin Qiu, Chun-Yan Li

Journal of Electrochemistry

In 0.1 mol/L, HAc solution (pH=2.89), the voltammetric behaviours of aloeemodin at a glassy carbon electode has been studied, One pair of current peak of the voltammogram maybe attributed to a quasireversible two-electron transfer of aloeemodin molecules at the glassy carbon electrode. A new method, the derivative anodic stripping voltammetry, for aloeemodin de-termination is described. The adsorptive potential of aioeemodin is -0. 80 V (vs. SCE) , while itsstripping potential is -0.38 V (vs. SCE). The peak current is propotionat to the concentration ofaloeemodin over the range of 2.0 x10⁷~8.0 x10⁶ mol/L. The method is simple, rapid …

University Of Montana Events Thursday, Nov. 29, Through Thursday, Dec. 6, 2001, University Of Montana--Missoula. Office Of University Relations

University of Montana News Releases, 1928, 1956-present

No abstract provided.

Central Florida Future, Vol. 34 No. 15, November 28, 2001

Central Florida Future

Activity and Service Fee increased; Microbiology senior candidate for the Rhodes scholarship; UCF adds option to pay online.

Research Progress On Proton Exchange Membranes Of Fuel Cells, Jing-Rong Yu, Dan-Min Xing, Fu-Qiang Liu, Jian-Guo Liu, Bao-Lian Yi

Journal of Electrochemistry

The proton exchange membrane fuel cells (PEMFC) use proton exchange membranes(PEM) as their electrolytes. The performance of the PEMFC is strongly dependent on the characteristics of the PEM. In this paper, the requirements of the PEM utilized in the PEMFC were analyzed. The per-fluorinated, partially fluorinated and non-fluorinated PEM were introduced respectively. The structures, preparation, properties of the various types of PEM and their applications in the PEMFC were also discussed in detail.

The Influence Of Synthesis Conditions On The Electrochemical Properties Of Spinel Limn2O4, Jun-Feng Xu, Zhi-Yu Jiang

Journal of Electrochemistry

The electrochemical properties of spine LiMn₂O₄ synthesized via a solid state reaction were investigated. Electrolysis MnO₂(EMD), Li₂CO₃ ,LiOH and LiNO₃ were used as the initial materials. It was found that the electrochemical properties of LiMn₂O₄ were strongly influenced by the synthesis conditions. The LiMn₂O₄ sample sprepared via the reactionof EMD and LiNO₃ showed the best properties for a lithiumion intercalation reaction. The procedure includes two steps:pretreatment at 280 ℃ for 6 hours to initiate the permeation of melting LiNO₃ into the microporesof EMD …

Adsorption And Oxidation Of Methanol On Pt And Sb, S Modified Pt Electrodes Using Cyclic Voltammetry And Eqcm, Guo-Liang Chen, Sheng-Pei Chen, Heng Lin, Xing-Hong Zheng, Shi-Gang Sun

Journal of Electrochemistry

The processes of adsorption and oxidation of methanol on Pt, Pt/Sb ad and Pt/S ad electrodes were studied by using cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM). The results demonstrated that the oxidation of methanol depends strongly on oxidation states of electrode surface. Sb adatoms on Pt surface can adsorb oxygen at relatively low potentials, and exhibit catalytic effects for methanol oxidation. In contrast to Pt electrodes, the oxidation peak potential of methanol in this case negatively shifted to about 130 mV. In a contrary, the oxidation of S_ad atoms consumes oxygen species of Pt electrode surface. As …

Study On Electrochemical Behavior Of Copper In Nh3 ·H2O Solution Medium Including K3[Fe(Cn)6] During Cmp, Yue-Hua Hu, Han-Wei He, Ke-Long Huang

Journal of Electrochemistry

Influence of medium pH value and passivator concentrations on the copper passivation and CMP process were studied by electrochemical measurement technologies, relations of the film thickness and tightness with polishing process and polishing rates were investigated. Electrochemical variables influencing polishing process and rates were found out. Electochemical mechanism of polishing processes were explained by corrosion potential and corrosion current density. A recipe of K₃[Fe(CN)₆] as passivator and nano sized γ-Al₂O₃ as abrasives in medium of NH₃·H₂O solution was confirmed reasonable. It is shown that the conditions of polishing process …

Study On The Anticorrosion Of Ld-2 Compound Inhibitor On Reinforcing Steel In Seawater, Rong-Gui Du, Zhou-Cheng Wang, Ruo-Shuang Huang, Rong-Gang Hu, Bing Zhao, Jian-Guang Tan, Chang-Jian Lin

Journal of Electrochemistry

The effect of LD-2 compound inhibitor developed in our laboratory on its anticorrosion action on the reinforcing steel in concrete immersed in seawater was shown in this paper. The corrosion behavior of the reinforcing steel in seawater was studied using electrochemical techniquesand immersion tests. The polarization curve of the reinforcing steel immersed in seawater showedthe free corrosion potential of the steel increased by 0. 220 V (vs. SCE), and the corrosion current decreased by two orders of magnitude by adding 25 g⋅L^-1 compound inhibitor to the seawater. The potentiodynamic anodic polarization curve of reinforcing steel in the seawater with …

On Some Optimal Tests In Finite Mixtures: Constructions And Applications., Chandranath Pal Dr.

Doctoral Theses

Mixtures of distributions are now-a-days playing very important roles in both theoretical and applied statistics. There is an abundance of real-life situations where mixture distributions are being extensively used for modelling data and drawing inference. Several books and monographs on mixtures have so far been published, e.g., Everitt and Hand (1981), Titterington et al. (1985), McLachlan and Basford (1988), McLachlan (1997) etc., which cover a wide area on different aspects of mixture distributions and their applications. The book by Titterington et al. (1985, pp. 16-21), in particular, contains a comprehensive list of references on direct applications of finite mixtures in …

November 27, 2001, Council On Teacher Education

Minutes

No abstract provided.

Spartan Daily, November 27, 2001, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily (School of Journalism and Mass Communications)

Volume 117, Issue 59

Faculty Senate Meeting Minutes, 11/27/2001, P 148-170, Unm Faculty Senate

Faculty Senate Meeting Minutes, 1920 - 2013

No abstract provided.

Independent- Nov. 27, 2001, Scott Plencner

The Independent (1988-present)

No abstract provided.

The New Hampshire, Vol. 91 [92], No. 20 (Nov. 27, 2001), The New Hampshire

The New Hampshire Print Edition

An independent student produced newspaper from the University of New Hampshire. This volume was printed as 91, but it is the 92nd volume in the series. This was corrected in pencil.

Regional Variations Of Kachina Iconography In Eastern Pueblo Rock Art, Dara Leigh Saville

Geography ETDs

This research addresses the problem of identifying patterns of regional variation in the kachina iconography of the Eastern Pueblo Province. Data produced in this study is also used to reevaluate the Rio Grande Hypothesis, which proposes a Jornada Mogollon origin for Pueblo kachinas. The author examines a sample of kachina images that are present in the rock art of the Rio Grande Valley and Eastern Mountain region of central New Mexico. The sample includes kachinas from the Lyden site on Black Mesa, Frijoles Canyon of Bandelier National Monument, Piedras Marcadas Canyon of Petroglyph National Monument, Cerro Indio at San Acacia, …

Tachyonic Instability And Dynamics Of Spontaneous Symmetry Breaking, Gary Felder, Lev Kofman, Andrei Linde

Physics: Faculty Publications

Spontaneous symmetry breaking usually occurs due to the tachyonic (spinodal) instability of a scalar field near the top of its effective potential at φ=0. Naively, one might expect the field φ to fall from the top of the effective potential and then experience a long stage of oscillations with amplitude O(v) near the minimum of the effective potential at φ=v until it gives its energy to particles produced during these oscillations. However, it was recently found that the tachyonic instability rapidly converts most of the potential energy V(0) into the energy of colliding classical waves of the scalar field. This …

Reflection Of A Long-Period Gravity Wave Observed In The Nightglow Over Arecibo On May 8–9, 1989?, Michael P. Hickey Ph.D.

Publications

During the Arecibo Initiative for Dynamics of the Atmosphere (AIDA) campaign in 1989 a characteristic of gravity wave perturbations observed in mesopause region airglow emissions was that airglow brightness fluctuations and airglow-derived temperature fluctuations often occurred either in phase or in antiphase. This stimulated the development of a theory suggesting that such in-phase fluctuations were most probably the result of strong reflections occurring in the mesosphere and lower thermosphere region. Recent examination of a particular wave event and application of simple WKB-type theory has appeared to support this hypothesis. Here we use a full-wave model and a WKB-type model, each …

Mustang Daily, November 26, 2001

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

2001 November 26 - Graduate Council Minutes, College Of Graduate And Continuing Studies, East Tennessee State University

Graduate Council Agendas and Minutes

No abstract provided.

Fortnightly - November 26, 2001

Fortnightly

No abstract provided.

Terahertz Gain In A Sige/Si Quantum Staircase Utilizing The Heavy-Hole Inverted Effective Mass, Richard A. Soref, Greg Sun

Physics Faculty Publications

Modeling and design studies show that a strain-balanced Si_1−xGe_x/Si superlattice onSi_1−yGe_y-buffered Si can be engineered to give an inverted effective mass HH2 subband adjacent to HH1, thereby enabling a 77 K edge-emitting electrically pumped p–i–pquantum staircase laser for THz emission at energies below the 37 meV Ge–Ge optical phonon energy. Analysis of hole-phonon scattering, lifetimes, matrix elements, and hole populations indicates that a gain of 450 cm⁻¹ will be feasible at f = 7.3 THz during 1.7 kA/cm² current injection.

University Of Northern Iowa Faculty Senate Meeting Minutes, November 26, 2001, University Of Northern Iowa. Faculty Senate.

Documents - Faculty Senate

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

Environment-Induced Degradation And Crack-Growth Studies Of Candidate Target Materials: Aaa Task-4 Quarterly (September 1 – November 30, 2001) Report, Ajit K. Roy, Brendan O'Toole

Transmutation Sciences Materials (TRP)

The primary objective of this task is to evaluate the effect of hydrogen on environment-assisted cracking of candidate materials for applications in spallation-neutron-target (SNT) systems such as accelerator production of tritium (APT) and accelerator transmutation of waste (ATW). The materials selected for evaluation and characterization are martensitic stainless steels including HT- 9, EP 823 and 422. The susceptibility to stress corrosion cracking (SCC) and hydrogen embrittlement (HE) of these alloys will be evaluated in environments of interest using tensile specimens under constant load and slow-strain-rate (SSR) conditions. The extent and morphology of cracking of these alloys will further be evaluated …

Development Of A Mechanistic Understanding Of High-Temperature Deformation Of Alloy Ep-823: Task 10, First Quarter Report, Ajit K. Roy, Brendan O'Toole

Transmutation Sciences Materials (TRP)

The objective of this task is to evaluate the elevated temperature tensile properties of Alloy EP-823, a leading target material for accelerator-driven waste transmutation applications. The test material will be thermally treated prior to evaluation of its tensile properties at temperatures relevant to the transmutation applications. The deformation characteristics of tensile specimens, upon completion of testing, will be evaluated by surface analytical techniques including scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The overall results are expected to provide a mechanistic understanding of high-temperature deformation behavior of Alloy EP-823 as a function of heat treatment.

Highlights of Accomplishment

• …

Fine-Tuning Solution For Hybrid Inflation In Dissipative Chaotic Dynamics, Rudnei O. Ramos

Dartmouth Scholarship

We study the presence of chaotic behavior in phase space in the preinflationary stage of hybrid inflation models. This is closely related to the problem of initial conditions associated with these inflationary types of model. We then show how an expected dissipative dynamics of fields just before the onset of inflation can solve or ease considerably the problem of initial conditions, driving the system naturally toward inflation. The chaotic behavior of the corresponding dynamical system is studied by computation of the fractal dimension of the boundary in phase space separating inflationary from noninflationary trajectories. The fractal dimension for this boundary …