Variational treatment of electron-polyatomic molecule scattering calculations using adaptive overset grids

The Complex Kohn variational method for electron-polyatomic molecule scattering is formulated using an overset grid representation of the scattering wave function. The overset grid consists of a central grid and multiple dense, atom-centered subgrids that allow the simultaneous spherical expansions of the wave function about multiple centers. Scattering boundary conditions are enforced by using a basis formed by the repeated application of the free particle Green's function and potential, $\hat{G}^+_0\hat{V}$ on the overset grid in a "Born-Arnoldi" solution of the working equations. The theory is shown to be equivalent to a specific Pad\'e approximant to the $T$-matrix, and has rapid convergence properties, both in the number of numerical basis functions employed and the number of partial waves employed in the spherical expansions. The method is demonstrated in calculations on methane and CF$_4$ in the static-exchange approximation, and compared in detail with calculations performed with the numerical Schwinger variational approach based on single center expansions. An efficient procedure for operating with the free-particle Green's function and exchange operators (to which no approximation is made) is also described

The potential role of arteriolar vasodilator responsiveness in orthostatic intolerance

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Includes bibliographical references (leaves 35-41).Astronauts returning to earth experience hypotension from hours to days. The subsequent inability to maintain the upright (orthostatic) position diminishes work capacity. Orthostatic hypotension appears to result from weightlessness-induced cardiovascular adaptations, such as resistance vessel (arteriole) adaptations. This study investigates the effects of hindlimb unloading (simulated microgravity) on vasodilatory properties of rat skeletal muscle arterioles. Rodent hindlimb unloading is an established model of microgravity that provides the headward fluid shifts and unloading of postural muscles that occur in space. Sprague-Dawley rats were assigned to two groups: control rats (C, n =8) and hindlimb unloaded (HU, n =5). HU rats were tail suspended for 2 weeks. First order (1A) arterioles were dissected from both control and hindiimb unloaded rats and cannulated on micro-pippettes under constant pressure (60 cm H20). Vasodilatory response curves were produced by the cumulative addition of acetylcholine, adenosine, isoproterenal and sodium nitroprusside. Results indicate that hindlimb unloaded soleus muscle arterioles exhibited a decrease in acetylcholine induced dilation and gastrocnemius muscle arterioles produced diminished isoproterenol-induced dilation. Thus, dilatory properties of resistance vessels are not altered by simulated microgravity in a way that contributes to orthostatic hypotension. Since soleus muscle blood flow is known to decrease by an order of magnitude during hindlimb unloading, the shear stress against the vessel wall is reduced. Acetylcholine induces dilation through a mechanism that is similar to shear stress-induced dilation. Thus, the diminished dilation in the soleus muscle arterioles provides further evidence for elucidating a possible mechanism for the diminished aerobic capacity experienced after simulated and genuine weightlessness

Discovering Conceptual Metaphors In High School Biology To Instruct English Language Learners

An investigation was completed to identify and define abstraction that occurs within abstract nouns in biology terminology in the Mississippi high school biology subject area practice test in order to determine conceptual language patterns in biology terms to teach to high school English Learners. The conceptual metaphors that dominate biology concepts in major scientific theories of the text exemplar examined are ORGANISMS ARE MACHINES, ECOSYSTEMS ARE COMMUNITIES, DNA IS A TEMPLATE, and DESIRED TRAITS ARE VALUABLE. The most prevalent common conceptual metaphors found within abstract nouns in biology of the text examined are MATTER IS A STRUCTURE, PROCESS IS A FUNCTION, and MATTER IS A FUNCTION. A systematic method was devised by the author to analyze the quantity and description of conceptual metaphors present in abstract nouns in biology terminology following a descriptive analysis guided by methods used with Lakoff and Johnson’s Theory of Conceptual Metaphor. Results suggest that PROCESS and MATTER are mapped onto most FUNCTION and STRUCTURE concepts embedded in a majority of the biology terminology. Definition of group membership to the MATTER category is also identified to be on a continuum of abstraction and more clearly defined by identifying the mapping of either PROCESS or MATTER onto the FUNCTION, DESTINY, LOCALIZATION or STRUCTURE. The results of the common conceptual metaphors identified indicate that FUNCTION AND STRUCTURE are extremely important to comprehend in order to understand basic concepts of biology. The author also suggests that the abstraction that occurs within abstract nouns in the MATTER category that are defined by FUNCTION or DESTINY would equate to the abstraction that occurs in abstract nouns in the PROCESS category. Grouped together as one category these abstract nouns that map abstraction onto abstraction account for 55% of the abstract nouns analyzed. This amount suggests that most of the abstract nouns in biology within this study do not follow the directionality of the Theory of Cognitive Metaphor or of previous Cognitive Linguistics studies that have examined scientific vocabulary,

Alien Registration- Mccurdy, Margaret R. (Calais, Washington County)

https://digitalmaine.com/alien_docs/2191/thumbnail.jp

MENTAL HEALTH IN THE AFRICAN AMERICAN CHURCH: DISMANTLING THE STIGMA OF TREATMENT AND SERVICES

The purpose of this study is to identify the prevailing mental health perspectives of African American spiritual leaders and to analyze how their views on this subject are communicated to their congregations. Historically, research has demonstrated that African American clergy have admonished congregants for seeking mental health care from mental health professionals instead of seeking God. Twelve African American and Caucasian American spiritual leaders were interviewed. According to the interview results, spiritual leaders\u27 personal beliefs about mental health impact their perspectives on mental health services, which determines their receptiveness and support––or lack thereof––of mental health services. The research concluded that providing education on mental health to spiritual leaders, their staff, and congregants could help destigmatize mental health in the African American community. Mental health training could open a dialogue on mental well-being and reduce the disparity between African Americans and Caucasian Americans in the rate at which mental health services are received

Development of an annoyance model based upon elementary auditory sensations for steady-state aircraft interior noise containing tonal components

The purpose of this investigation was to develop a noise annoyance model, superior to those already in use, for evaluating passenger response to sounds containing tonal components which may be heard within current and future commercial aircraft. The sound spectra investigated ranged from those being experienced by passengers on board turbofan powered aircraft now in service to those cabin noise spectra passengers may experience within advanced propeller-driven aircraft of the future. A total of 240 sounds were tested in this experiment. Sixty-six of these 240 sounds were steady state, while the other 174 varied temporally due to tonal beating. Here, the entire experiment is described, but the analysis is limited to those responses elicited by the 66 steady-state sounds

Evaluation with Collaboration

Collaboration is a technique used to promote deep learning but it is not often associated with evaluation. An article in “The Teaching Professor” newsletter led me to a study using a collaborative evaluation technique1. I’ve adapted this technique for use in a first year biochemistry tutorial for nursing students, with much success. The exercise allows students to answer a multiple choice quiz on their own, then discuss the questions in a group with the opportunity to change their answers after the discussion. Along with individual answers, students are able to assign a confidence value to their answers. Their final grade, marked by switching papers with another group, reflects the confidence they assigned to their answer. Papers are returned to their owners after marking and teaching assistants give immediate feedback on rationale behind both correct and incorrect answers. Anecdotal evidence (via personal conversations with students) highlights that the exercise allows students to identify learning gaps/misconceptions, promotes integration of content and provides a high level of student satisfaction. This short session will discuss the technique along with the pedagogical theories behind its development and adaption. Under 140 character conclusion: Collaborative testing exercise promotes integration, deep learning and student satisfaction 1Erica J. Sainsbury & Richard A. Walker (2008): Assessment as a vehicle for learning: extending collaboration into testing, Assessment & Evaluation in Higher Education, 33:2,103-11

Measurement of Change in Nursing Students’ Attitudes Towards Biochemistry in a Clinically Relevant Course

The first year biochemistry course in the nursing program at McMaster University has traditionally been taught by that department as an online course. This year, the course is being taught face to face, through the nursing department, with an attempt to “pull together” the basic science content with core concepts of nursing care. The literature shows that nursing students tend to have difficulty relating abstract scientific information to clinical situations1. They are also apt to ignore information not seen as relevant to their view or perspective of nursing1. Since their attitude has been shown to affect academic performance2, this study was designed to examine changes in attitude resulting from highlighting the relevance of basic biochemistry to nursing practice. Our study utilizes a mixed methods approach that consists of two phases. Phase I encompassed the development of an instrument to measure nursing student attitudes towards biochemistry. Qualitative information, gathered from faculty and upper level students about their perspectives on the value of biochemistry in a nursing program, was used to create assertions. The procedure followed in the construction of the instrument, including attempts to ensure validity and reliability, was previously presented as a poster and will be included in the discussion. Phase II consists of an online survey, administered at the beginning and end of the course, containing a likert scale linked to those statements. This talk will present the preliminary findings from the study and describe how the introduction of clinical relevance in the teaching of biochemistry affects student attitudes. 1Thornton, T. (1997). Attitudes towards the relevance of biological, behavioural and social sciences in nursing education. J Adv Nurs 26(1): 180-186. 2Harvey, T. J. and J. Vaughan (1990). Student nurse attitudes towards different teaching/learning methods. Nurse Educ Today 10(3): 181-185

Solving the Coulomb scattering problem using the complex scaling method

Based on the work of Nuttall and Cohen [Phys. Rev. {\bf 188} (1969) 1542] and Resigno et al{} [Phys. Rev. A {\bf 55} (1997) 4253] we present a rigorous formalism for solving the scattering problem for long-range interactions without using exact asymptotic boundary conditions. The long-range interaction may contain both Coulomb and short-range potentials. The exterior complex scaling method, applied to a specially constructed inhomogeneous Schr\"odinger equation, transforms the scattering problem into a boundary problem with zero boundary conditions. The local and integral representations for the scattering amplitudes have been derived. The formalism is illustrated with numerical examples.Comment: 3 pages, 3 figure