Mass spectra of positive and negative ions in nitrous and nitric oxides

Mass spectra of positive and negative ions in nitrous and nitric oxide

Budding and Domain Shape Transformations in Mixed Lipid Films and Bilayer Membranes

We study the stability and shapes of domains with spontaneous curvature in fluid films and membranes, embedded in a surrounding membrane with zero spontaneous curvature. These domains can result from the inclusion of an impurity in a fluid membrane, or from phase separation within the membrane. We show that for small but finite line and surface tensions and for finite spontaneous curvatures, an equilibrium phase of protruding circular domains is obtained at low impurity concentrations. At higher concentrations, we predict a transition from circular domains, or "caplets", to stripes. In both cases, we calculate the shapes of these domains within the Monge representation for the membrane shape. With increasing line tension, we show numerically that there is a budding transformation from stable protruding circular domains to spherical buds. We calculate the full phase diagram, and demonstrate a two triple points, of respectively bud-flat-caplet and flat-stripe-caplet coexistence.Comment: 14 pages, to appear in Phys Rev

The Negro Principal\u27s Perception Of His Problems In The Public Schools Of Texas

STATEMENT AND SCOPE OF THE PROBLEM The purpose of the study, The Negro Principal*s Perception of His Problems in the Public Schools of Texas , is to examine the role of the Negro principal in the public schools of Texas in the light of his perceptions of his problems as he attempts to bring about improvements in the quality of living in his community, or as he attempts to relate the schools more effectively to the community. The study essays to present and discuss the urgent problems found in the administration and supervision of the public schools of Texas by Negro principals. It deals with these problems from the point of view of the Negro principal who plays a major role in administering and supervising the Negro public schools of the state of Texas. Specifically, the study, on the basis of data compiled for presentation at the Twenty-Third Annual Conference on the Education of Negroes in Texas held at Prairie View A & M College, Prairie View, Texas on March 7, 1952, the theme of which was The Negro Administrator in the Public Schools of Texas , presents an elaboration upon data collected in the area of problems of the Negro principal in the public schools of Texas. On the basis of this data, the study seeks to throw light on the following questions: 1. What are the problems of the Negro principals with regard to the administration and supervision of the public schools of Texas? 2. How do teachers rate their principals with respect to the nature of these problems? 3. In what areas are the problems of the Negro principals of the state of Texas concentrated? 4. What is the significance, if any, of this concentration of problems as reported by the principals of the state of Texas? Blake and Ramsey1 define the term perception as : Those interactions between an organism and its (necessary) environment in which the form of response is governed by the signal or sign significance as contrasted with the energy strength or quality or pattern of the stimulus configuration itself

Exploring the practical knowledge of eccentric resistance training in high-performance strength and conditioning practitioners

Habitual use of eccentric exercise has been recognised to increase strength and power; however, the current body of knowledge has limited potential to understand the application of such resistance training in athletic populations. In order to develop appropriate applied research, that relates to elite athletic populations, it is vital to appreciate the practical knowledge of strength and conditioning practitioners operating in high-performance environments. This study summarised the questionnaire responses from 100 strength and conditioning practitioners operating in performance sport relating to questions such as the training effects to various eccentric resistance training regimes, the rationale for the use of these techniques and the knowledge supporting its application. The combination of closed and open-ended questions enabled a thematic analysis to be conducted. There was evidence that practitioners employed a variety of eccentric training methodologies; however, there was interest in gaining greater understanding of the training dose to bring about the optimal adaptive changes, and importantly how this might translate to sport-specific performance. In addition, practitioners would welcome recommendations associated with eccentric training, whilst concurrently minimising the issues of excessive fatigue, muscle damage and soreness. The training effects of interest included neural, architectural and morphological adaptations and, importantly, translation to performance of sports-specific skills. Collectively, these responses called for more practically relevant research to be conducted within the high-performance environment, alongside more opportunities for professional development through learning and knowledge-sharing opportunities. The outcomes summarised in this work should inform future applied research projects and educational content relating to eccentric training

Determination of Electron Affinity Differences by Surface Ionization

Electron affinity differences determined by surface ionization on hot tungsten through use of polyatomic halogen molecular bea

Body mass index and age affect Three-Factor Eating Questionnaire scores in male subjects

This cross-sectional analysis evaluated the effect of age and body mass index (BMI) on Three-Factor Eating Questionnaire scores in males. Subjects (n = 60) were recruited according to BMI status. Each completed the 51-item Three-Factor Eating Questionnaire. The group was split at the median age to produce a "younger" and "older" group for statistical analysis. A 2-way between-groups analysis of variance revealed a significant main effect of BMI on disinhibition (P = .003) and hunger (P = .041) with higher levels found in overweight males compared to healthy-weight counterparts. A significant main effect of age on hunger (P = .046) demonstrated older males were less susceptible to hunger than younger males. These insights provide a better understanding of eating behavior across the male life cycle and may assist health professionals to better guide men in weight management in the light of rising overweight/obesity. (c) 2009 Elsevier Inc. All rights reserved

Departmental Excellence: Constituencies in Tension

This article explores the question of departmental excellence within historicity and temporality and the political demands of multiple constituencies. If one accepts excellence as a rhetorical construct of political significance for a college campus, then one requires knowledge of the primary constituencies shaping this political debate. The eventual political outcome is shaped through the interplay of three constituencies: the discipline, the local campus and the larger public. The task for every department that wants to pursue excellence is to know, understand and operate within the hidden curriculum of a campus that socializes faculty to the ongoing mission of that particular institution

Communication and Professional Civility as a Basic Service Course: Dialogic Praxis Between Department and Situated in an Academic House

Communication departments frequently offer basic service courses to other campus departments or schools. A communication course sensitive to the mission of the university or college of which it is a part, as well as to its own mission, allows programs that include such a course in their curriculum to distinguish themselves from competing programs. Additionally, such a mission-sensitive course further defines departmental and university identity, assisting in institutionalizing a mission. Offering such a course provides an opportunity for dialogic praxis to occur between departments situated within the context of a local institution. Dialogic praxis involves knowledge of one\u27s own position, listening to the position of the Other, and recognition of the social and historical situation in which both parties are situated, and application, and collaborative application. Duquesne University\u27s Communication Department designed a course entitled Communication an Professional Civility for the Physician Assistant Department through a process of dialogic praxis. This course addresses issues of working on a task with others from a variety of professional perspectives with different standpoints within a local organizational home centered around a clear mission. This course provides a public discourse approach to basic communication issues within a complex modern organization