The Living ROMP of trans-Cyclooctene

The living ring-opening metathesis polymerization (ROMP) of trans-cyclooctene (tCO) was investigated. ROMP of tCO in the presence of PPh_3 in THF leads to the formation of narrowly dispersed polycyclooctene (PCO). The presence of PPh3 as an additive and the use of THF as a solvent were demonstrated to be necessary to suppress competing secondary metathesis processes in the ROMP of tCO. Under optimal conditions, narrowly dispersed PCO was achieved without high molecular weight contaminates. The PCO was then hydrogenated to form linear, narrowly dispersed polyethylene with a melting temperature of 139 °C. Protected, hydroxy-functionalized tCO was polymerized by this method to afford narrowly dispersed, hydroxylated PCO. Block copolymers containing polynorbornene and PCO or containing differentially functionalized PCO were also synthesized and hydrogenated to form block copolymers containing blocks of linear, narrowly dispersed polyethylene

Interview with Ron Staats

Ron Staats talks about living in Knox County and his involvement with the Radio Stationhttps://digital.kenyon.edu/ps_interviews/1041/thumbnail.jp

A Joint Junior Recital

This is the program for the joint junior recital of tenor Ron Walker, baritone George Stevenson, pianist Lynda Goff, and baritone Arthur Morris. Dian Ray accompanied Walker; Peggy Gullage accompanied Stevenson; and Dora Ann King accompanied Morris. The recital took place on May 7, 1964

Effect of sex congruence in athletic training students' clinical education dyads

Preparing healthcare providers for the realities of entry-level professional practice is critical. To this end, the traditional medical education model for a variety of disciplines mandates a period of supervised student clinical experience with a practitioner, or preceptor. Often graduates are not fully prepared to begin independent professional practice and there are indications that insufficient clinical education is partially to blame. The interpersonal dynamics of a clinical dyad are a critical component of clinical experience and can be influenced by dyad sex composition. The purpose of this study was to examine the effect of biological sex, and dyad sex congruence, on athletic training students' actual experience with effective clinical educator behaviors, expectations of ideal preceptors, and differences between the two.The Survey of Effective Clinical Educator Behaviors (SECEB(C)) and additional attitudinal questions were electronically distributed, via program directors, to athletic training students (ATS) in CAATE accredited athletic training professional programs. Responses from 279 ATS participants were analyzed based on ATS/preceptor clinical dyad (same/ opposite sex), and demographic factors for each of the electronic survey items. Findings did not reveal significant differences in ATS effective clinical educator ratings of their current clinical instructors based on dyad composition or on preceptor sex. Regardless of dyad, however, participant ratings of current preceptors fell into the desirable range for only 1 of 4 SECEB subcategories and only 7 of 20 individual items. When considering ATS expectations of ideal effective clinical educator ratings, females had significantly higher expectations for behaviors that give information and ask questions. Additionally, intradyad comparisons revealed that ATS experiences are rated significantly lower than ideal expectations in all four SECEB subcategories and 19 of 20 items. Furthermore, findings indicated that ATS value preceptor physical presence in the clinical learning environment less than other effective clinical educator behaviors.Conclusions are discussed in the context of preceptor preparation, role theory, culture and mentoring relationships. Key policy implications regarding preceptor qualification and preparation, and terminology; practice implications related to programmatic assessment and preceptor behavior modification; and research implications for preceptor preparation, mentorship, graduate education, and preceptor attitudes are discussed and recommendations are provided

Optimization of Fluorescent Detection of Rotavirus Protein NSP4 and a Cellular Receptor in two Cell Lines

Rotavirus (RV) infections are the most common cause of severe diarrhea in infants and young children worldwide. The two licensed vaccines for RV protect children from common strains of RV, but they are less effective against new emerging RV strains. Therefore, new therapeutics to treat RV infections need to be developed. Recently, we have shown stilbenoids, trans-arachidin-1 (t-A1) and trans-arachidin-3 (t-A3), decrease progeny virus particles by one hundred fold. Likewise, western blot assays show a decrease in the amount of the viral protein NSP4 with the addition of the stilbenoids during a RV infection. This indicates an effect on viral replication. Immunoblot assays are a standard and cost effective means to analyze the effects of stilbenoids on RV infections

Ambiguities in the partial-wave analysis of pseudoscalar-meson photoproduction

Ambiguities in pseudoscalar-meson photoproduction, arising from incomplete experimental data, have analogs in pion-nucleon scattering. Amplitude ambiguities have important implications for the problems of amplitude extraction and resonance identification in partial-wave analysis. The effect of these ambiguities on observables is described. We compare our results with those found in earlier studies.Comment: 12 pages of text. No figure

Isotropy, shear, symmetry and exact solutions for relativistic fluid spheres

The symmetry method is used to derive solutions of Einstein's equations for fluid spheres using an isotropic metric and a velocity four vector that is non-comoving. Initially the Lie, classical approach is used to review and provide a connecting framework for many comoving and so shear free solutions. This provides the basis for the derivation of the classical point symmetries for the more general and mathematicaly less tractable description of Einstein's equations in the non-comoving frame. Although the range of symmetries is restrictive, existing and new symmetry solutions with non-zero shear are derived. The range is then extended using the non-classical direct symmetry approach of Clarkson and Kruskal and so additional new solutions with non-zero shear are also presented. The kinematics and pressure, energy density, mass function of these solutions are determined.Comment: To appear in Classical and Quantum Gravit

Modeling of Non-Small Cell Lung Cancer Volume Changes during CT-Based Image Guided Radiotherapy: Patterns Observed and Clinical Implications

Background. To characterize the lung tumor volume response during conventional and hypofractionated radiotherapy (RT) based on diagnostic quality CT images prior to each treatment fraction. Methods. Out of 26 consecutive patients who had received CT-on-rails IGRT to the lung from 2004 to 2008, 18 were selected because they had lung lesions that could be easily distinguished. The time course of the tumor volume for each patient was individually analyzed using a computer program. Results. The model fits of group L (conventional fractionation) patients were very close to experimental data, with a median Δ% (average percent difference between data and fit) of 5.1% (range 3.5–10.2%). The fits obtained in group S (hypofractionation) patients were generally good, with a median Δ% of 7.2% (range 3.7–23.9%) for the best fitting model. Four types of tumor responses were observed—Type A: “high� kill and “slow� dying rate; Type B: “high� kill and “fast� dying rate; Type C: “low� kill and “slow� dying rate; and Type D: “low� kill and “fast� dying rate. Conclusions. The models used in this study performed well in fitting the available dataset. The models provided useful insights into the possible underlying mechanisms responsible for the RT tumor volume response

Jack Voltaic 3.0 Cyber Research Report

The Jack Voltaic (JV) Cyber Research project is an innovative, bottom-up approach to critical infrastructure resilience that informs our understanding of existing cybersecurity capabilities and identifies gaps. JV 3.0 contributed to a repeatable framework cities and municipalities nationwide can use to prepare. This report on JV 3.0 provides findings and recommendations for the military, federal agencies, and policy makers