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Search Results: 1 - 10 of 448531 matches for " L. J. Brillson "
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Depth-Resolved Subsurface Defects in Chemically Etched SrTiO3
Jun Zhang,D. Doutt,T. Merz,J. Chakhalian,M. Kareev,J. Liu,L. J. Brillson
Physics , 2009, DOI: 10.1063/1.3093671
Abstract: Depth-resolved cathodoluminescence spectroscopy of atomically flat TiO2-terminated SrTiO3 single crystal surfaces reveals dramatic differences in native point defects produced by conventional etching with buffered HF (BHF) and an alternative procedure using HCl-HNO3 acidic solution (HCLNO), which produces three times fewer oxygen vacancies before and nearly an order of magnitude fewer after pure oxygen annealing. BHF-produced defect densities extend hundreds of nm below the surface, whereas the lower HCLNO-treated densities extend less than 50 nm. This "Arkansas" HCLNO etch and anneal method avoids HF handling and provides high quality SrTiO3 surfaces with low native defect density for complex oxide heterostructure growth
Probabilistic Verification over GF(2m) Using Mod2-OBDDs  [PDF]
J.L. Imana
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2010.22012
Abstract: Formal verification is fundamental in many phases of digital systems design. The most successful verification procedures employ Ordered Binary Decision Diagrams (OBDDs) as canonical representation for both Boolean circuit specifications and logic designs, but these methods require a large amount of memory and time. Due to these limitations, several models of Decision Diagrams have been studied and other verification techniques have been proposed. In this paper, we have used probabilistic verification with Galois (or finite) field GF(2m) modifying the CUDD package for the computation of signatures in classical OBDDs, and for the construction of Mod2-OBDDs (also known as ?-OBDDs). Mod2-OBDDs have been constructed with a two-level layer of ?-nodes using a positive Davio expansion (pDE) for a given variable. The sizes of the Mod2-OBDDs obtained with our method are lower than the Mod2-OBDDs sizes obtained with other similar methods.
Empirical Analysis of Factors Affecting the E-Book Adoption—Research Agenda  [PDF]
J. K. L. Poon
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.25011
Abstract: Advances in information technology encourage the development of e-books. The 2010 Horizon Report predicts that e-book will be one of the six technologies most likely to affect higher education in coming years. Despite the huge investment in developing the e-book market, customer take-up over the past decades is still far below expectations. The success of e-book adoption depends on the implementation of an educational model that addresses learner needs as well as content relevance. To understand customer behavior intention in adopting e-books and to address the lack of holistic approach in adoption research, this project is proposed to investigate the intention of college students in using e-books. This cross-sectional research utilizes the Technology Acceptance Model (TAM) and four additional variables, namely, personal innovativeness of information technology, social influences, perceived costs, and environmental consciousness. The study is expected to contribute to the literature by providing an empirically validated extended TAM regarding e-books. Moreover, the results will provide important and useful information for academicians and publishers.
The Use of Microcontrollers by Scientists in Experimental Research Applications  [PDF]
J. L. Genicot
World Journal of Nuclear Science and Technology (WJNST) , 2015, DOI: 10.4236/wjnst.2015.51003
Abstract: If the microcontrollers are devices quite easy to use for experts in electronics, a scientist devoted to different research topics from digital electronics is generally totally unable to develop and use these complex components. Most of the time, the researcher is looking for simple devices able to control different parameters during his experimentation. He is obliged in this case to request the intervention of an expert in electronics to develop such a device and the result is sometimes different from the precise initial requirement. Nowadays, it is possible to find on the market, simple units able to satisfy the requirements of the scientist and easy enough to be manipulated by him in specific applications. The purpose of this paper is to present some of these devices and to compare their possibilities and the ways to use them. These devices are compared in optically stimulated dosimetry with applications found in external dosimetry, interventional radiology, nuclear medicine and space dosimetry.
Preservation of Minority Languages in North America: French Immersion Programs in the Province of Alberta  [PDF]
Baltasar J. López Ruiz
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.34012
Abstract: Canada, which was officially declared a bilingual nation after the proclamation of the Official Language Act (1969), counts with a low percentage of French speaking population who hardly reaches a quarter of the total population. We must add the fact that there is a very little fraction of the population who speaks French outside the province of Quebec. Social, cultural and ethnic realities which are present within the Canadian territories enable us to observe and investigate the diversity of identities and the different linguistic assimilation processes experienced by non Anglophone citizens. Facts seem to indicate that the francophone minority groups, living in areas of the country where the most spoken language is different from their mother tongue, struggle for the preservation of their cultural heritage at the same time that keep alive their Canadian identity. The possibility of contrasting the situation of the Francophones in Western Canada with the reality of other minority groups which represent a similar percentage with respect to the total population—such as the Germans and the Ukrainian origin citizens—constitutes a valuable resource in order to predict the evolution of the demographic patterns and the use of French as a heritage language within the Canadian territories. The present work reviews the diverse political, linguistic and demographic contexts that may support our idea that using an additional language—French and English in the case of most Francophones in Western Canada—represents an advantage from a cognitive, social and linguistic point of view. The high degree of acceptance of the francophone schools and the popularity of the French immersion programs set up by Albertan authorities are considered within this article in order to support this hypothesis.
J. J. L. Coetzee
South African Journal of Industrial Psychology , 1990, DOI: 10.4102/sajip.v16i2.503
Abstract: Managing Industrial Relations in South Africa is inderdaad in velerlei opsigte 'n indrukwekkende publikasie.
Carryover Effect of Imidazolinone Herbicides for Crops Following Rice  [PDF]
L. O. Santos, J. J. O. Pinto, L. B. Piveta, J. A. Noldin, L. Galon, G. Concen?o
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.58117

We aimed with this study to evaluate the effects of residual activity in soil of formulated mixtures of the herbicides imazethapyr + imazapic and imazapyr + imazapic on ryegrass and on rice cultivars, IRGA 424 and BRS Querencia. Two experiments were conducted under greenhouse in randomized blocks design with four replications in split-plot and split-split-plot designs, respectively for the first (E1) and second (E2) experiments. For E1, main plots allocated herbicides (imazethapyr + imazapic and imazapyr + imazapic), and subplots the doses [(0, 0.5, 1.0, 1.5 and 2.0 fold the label dose of imazethapyr + imazapic (1 L·ha-1) and imazapyr + imazapic (140 g·ha

GPS- vs. DEM-Derived Elevation Estimates from a Hardwood Dominated Forest Watershed  [PDF]
L. Chris Kiser, J. Michael Kelly
Journal of Geographic Information System (JGIS) , 2010, DOI: 10.4236/jgis.2010.23021
Abstract: Topographic attributes are often used as explanatory variables when providing spatial estimates of various environmental attribute response variables. Elevation of sampling locations can be derived from global positioning systems (GPS) or digital elevation models (DEM). Given the potential for differences in elevation among these two data sources, especially in response to forest canopy cover, our objective was to compare GPS and DEM-derived elevation values during the dormant season. A non-parametric Wilcoxon test indicated GPS elevation was higher than DEM elevation with a mean difference of 6 m. Linear regression analysis indicated that GPS and DEM elevation were well correlated (R2 = 0.71, r = 0.84, p < 0.0001). Although elevation among the two data sources differed, the strong linear relationship allows for correction of elevation values in a predictable manner.
The Static Characteristic Loop and the External Demagnetizing Factor  [PDF]
J. Takacs, Gy. Kovacs, L. K. Varga
Materials Sciences and Applications (MSA) , 2012, DOI: 10.4236/msa.2012.310100
Abstract: In this paper we demonstrate, that shearing is changing only one parameter of the static loop. By using the shearing factor Ns, linked to the widely used, demagnetization coefficient ND, we show the one parameter link between the static unsheared and that of the sheared saturation loop, obtained by a non-toroidal, open circuit hysteresis measurement. The paper illustrates the simple relation between open circuit loop data and measured real static saturation data. The proposed theory is illustrated by using the hyperbolic model. For experimental illustration, tests results are used, which were carried out on two closed and open toroidal samples, made of NO Fe-Si electrical steel sheet, mimicking the demagnetization effect of the open circuit VSM measurement. These are both theoretical and experimental demonstrations, that shearing only changes the inclination of the static hysteresis loop. These test results, presented here, agree very well with the calculated results, based on the proposed method.
Aged rat heart: Modulation of age-related respiratory defects decreases ischemic-reflow injury  [PDF]
Edward J. Lesnefsky, Charles L. Hoppel
Health (Health) , 2013, DOI: 10.4236/health.2013.51001

Myocardial injury increases in the elderly heart during ischemia and reperfusion. Mitochondria, the key targets and sources of injury during ischemia and reperfusion, sustain ischemic damage to the electron transport chain that is superimposed upon age-related defects. In the adult heart, interventions to activate endogenous cytoprotective signaling systems meet in mitochondria to decrease cardiac injury. Unfortunately, these systems are largely ineffective in the aged heart. Thus, new treatment concepts are needed to reduce injury in the aged heart. Our group chose a strategy to directly treat the effector of cardiac injury in the aged heart, the mitochondria. We further utilized a novel approach to ask if the reversal of aging defects in cardiac mitochondria before ischemia could decrease ischemia-reperfusion injury in the heart. Three hours following treatment with the small molecule, nutriceutical acetylcarnitine (AcCN), oxidative phosphorylation as well as age-induced defects in electron transport chain complexes III and IV was corrected in the heart. When such hearts were then exposed to ischemia and reperfusion, cardiac injury was markedly reduced. Contraction during reperfusion improved and recovery became similar to that in adult hearts. Cardiac cell death was substantially reduced. Thus, age-related defects in electron transport are a key mechanism of the increased myocardial injury in the elderly heart during ischemia and reperfusion. Modulation of aging-induced defects in mitochondrial metabolism reduces cardiac injury from ischemia and reperfusion, and is a novel strategy to protect myocardium in the elderly patient at risk for an acute myocardial infarction.

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