Compensation for Primary Reflector Wavefront Error

The object of the invention is to compensate for errors in a large telescope primary reflector by making certain compensating deviations in a smaller, auxiliary reflector of the telescope. At least one intermediate element forms an image of the primary surface onto the secondary surface, so each point on the secondary surface corresponds to a point on the primary surface. The secondary surface is formed with a deviation from an ideal secondary surface, with the piston distance of each point on the actual secondary surface equal to the piston distance of a corresponding piston on the actual primary surface from the ideal primary surface. It is found that this results in electromagnetic (e.g., light) rays which strike a deviating area of the actual primary surface being brought to the same focus as if the actual primary surface did not have a diviation from an ideal primary surface

Hypoplastic Left Heart Syndrome

Hypoplastic left heart syndrome (HLHS) is a type of congenital heart disease that results in the underdevelopment of the left-sided structures of the heart, including the mitral valve, left ventricle, aortic valve, ascending aorta, and aortic arch. HLHS was first described as a syndrome in 1958 by Nadas and NoonanFontanwho referred to it as combined aortic and mitral atresia.[1] HLHS affects 1 in 5,000 neonates or 3% of all infants born with congenital heart disease.[2][3] Thirty years ago, there were no treatment options for these neonates, and mortality was 100% within the first week of life.[4] Neonates born with HLHS are dependent on a patent ductus arteriosus and an interatrial communication for survival until surgical intervention. A continuous infusion of prostaglandin E1 (PGE1) is needed to maintain ductal patency. Today, several treatment options are available in the prenatal or neonatal period, including the Norwood procedure, hybrid stage 1, heart transplantation, palliative care, and fetal intervention. A series of three palliative surgical operations (Norwood/Hybrid, Hemi-Fontan/Bidirectional Glenn, and Fontan) are typically necessary for survival beyond the neonatal period and infancy. Though rare, a diagnosis of HLHS is responsible for 23% of all cardiac deaths in the first week of life.[1

Spatially distributed water-balance and meteorological data from the Wolverton catchment, Sequoia National Park, California

Accurate water-balance measurements in the seasonal, snow-dominated Sierra Nevada are important for forest and downstream water management. However, few sites in the southern Sierra offer detailed records of the spatial and temporal patterns of snowpack and soil-water storage and the fluxes affecting them, i.e., precipitation as rain and snow, snowmelt, evapotranspiration, and runoff. To explore these stores and fluxes we instrumented the Wolverton basin (2180-2750 m) in Sequoia National Park with distributed, continuous sensors. This 2006-2016 record of snow depth, soil moisture and soil temperature, and meteorological data quantifies the hydrologic inputs and storage in a mostly undeveloped catchment. Clustered sensors record lateral differences with regards to aspect and canopy cover at approximately 2250 and 2625 m in elevation, where two meteorological stations are installed. Meteorological stations record air temperature, relative humidity, radiation, precipitation, wind speed and direction, and snow depth. Data are available at hourly intervals by water year (1 October-30 September) in non-proprietary formats from online data repositories (https://doi.org/10.6071/M3S94T)

Submillimeter observations of OH and CH in M42

The (sup 2) pi sub 1/2 (J = 3/2 to 1/2) transitions of OH at 163.12 and 163.40 micro m have been detected and upper limits have been obtained for the (sup 2) pi sub 3/2 (J = 3/2 to 1/2) transitions of CH at 149.09 and 149.39 micro m, in observations of the Kleinmann-Low Nebula of Orion. All four flux levels lie between 1 and 1.2 x 10 to the 17th power/sq.cm. The OH lines are bright when compared to the lower, (sup 2) pi sub 3/2 (J = 5/2 to 3/2) fluxes reported and imply that the 119 micro m emission observed is partially self-absorbed. The combined results provide strong constraints. Taken together with existing data on molecular hydrogen and CO and recent data on other OH transition, they suggest OH emission from post-shock regions at temperatures T approx 1000 k, densities approx. 7 x 10 to the 6th powr/cu cm N sub OH approx 80/cu cm optically thick for the (sup 2) pi sub 3/2 (J = 5/2 to 3/2), 119 micro m but only partially self-absorbing in the (J = 7/2 to 3/2), 84 micro m transitions over a Doppler velocity bandwidth of 30 km/sec. The OH column density is N sub OH approx 4 x 10 to the 16th powr/sq cm. in the emitting regions which occupy a fraction of approx 0.1 of a 1' x 1' field of view centered on the Becklin-Neugebauer source. The CO (J = 31 to 30), 84 micro m transition appears to lie sufficiently close to one of the 84 micro m OH line components to be partially absorbed as well, through a Bowen-type mechanism

A Conceptual Design Study on the Application of Liquid Metal Heat Transfer Technology to the Solar Thermal Power Plant

Alkali metal heat transfer technology was used in the development of conceptual designs for the transport and storage of sensible and latent heat thermal energy in distributed concentrator, solar Stirling power conversion systems at a power level of 15 kWe per unit. Both liquid metal pumped loop and heat pipe thermal transport were considered; system configurations included: (1) an integrated, focal mounted sodium heat pipe solar receiver (HPSR) with latent heat thermal energy storage; (2) a liquid sodium pumped loop with the latent heat storage, Stirling engine-generator, pump and valves located on the back side of the concentrator; and (3) similar pumped loops serving several concentrators with more centralized power conversion and storage. The focus mounted HPSR was most efficient, lightest and lowest in estimated cost. Design confirmation testing indicated satisfactory performance at all angles of inclination of the primary heat pipes to be used in the solar receiver

The Role Mentoring Plays in the Transition to Practice of Newly Credentialed Athletic Trainers

Context: Mentoring has been identified as an important method of supporting newly credentialed athletic trainers (ATs) during their transition to practice. Gaining a better understanding of this relationship could provide valuable insights that may assist employers and professional programs in developing a plan to better facilitate the transition. Objective: To examine which aspects of the mentoring relationship provided the most benefit during the transition to practice of newly certified ATs. Design: Qualitative study. Setting: Individual phone interviews. Patients or Other Participants: A total of 13 ATs who graduated from a professional master\u27s program, were certified from February through July 2016, and obtained employment from July through August 2016 participated in this study (6 women, 7 men; age = 26 ± 3 years; work settings included professional sports, college, secondary and middle school, and clinic). Data saturation guided the number of participants. Data Collection and Analysis: Phone interviews using a semistructured interview guide were conducted at 3, 8, and 12 months of work experience. Data were analyzed using a constant comparative approach. Credibility was established via investigator triangulation, peer debriefing, and member checks. Participants recognized the mentoring relationship as a foundational aspect of the transition to practice. Mentors should be available by phone, email, or text to answer questions, provide feedback, or discuss ideas. Respondents wanted honest feedback, even when that feedback was constructively critical. Feedback was sought regarding topics such as patient care, communication, and networking. Participants needed reassurance and support from their mentors to help validate and improve their self-confidence. Conclusions: Newly credentialed ATs should seek mentors who will be available to communicate in various ways and will provide regular and constructive feedback. Future researchers should investigate how mentoring relationships influence other aspects of the transition to practice, such as patient care, overall job performance, turnover, and satisfaction

Barriers to Scholarship Integration in Professional Athletic Training Programs and Resources Needed to Overcome Barriers: A Report from the Association for Athletic Training Education Research Network

Context: Athletic training program administrators have identified that it is important to incorporate a scholarship component into professional education curricula. Objective: Explore the barriers to implementing student scholarship in professional programs and identify resources necessary to overcome the barriers. Design: Consensual qualitative research. Setting: Individual teleconference interview. Patients or Other Participants: A total of 17 program directors of professional programs was interviewed. Data Collection and Analysis: Programs reported an average of 3 ± 1 core faculty supporting 37 ± 21 students, with 3 ± 2 faculty involved in scholarship activities of their students. Data saturation guided the number of participants.Interviews occurred using a semistructured interview guide. All interviews were recorded and transcribed verbatim. Data were analyzed by a 3 person research team and coded into themes and categories based on a consensus process. Credibility was established by using multiple researchers, an external auditor, and member checks. Results: Two major themes emerged from the data: (1) current challenges and shortcomings and (2) resources and strategies needed to achieve scholarship. Participants noted a lack of research or scholarship culture at their current institution and a lack of faculty time and expertise to implement and guide research throughout the curriculum as current challenges. Participants further identified that a lack of clear expectations for how much scholarship was necessary and lack of buy-in from faculty, students, and preceptors made it difficult to implement scholarly projects in the curriculum. Necessary resources to overcome barriers included institutional support in the form of faculty release, support, training, or all of the aforementioned. Participants identified that collaborative research opportunities as well as publicly available examples of completed student scholarly activity would further guide them in overcoming the curricular challenge of implementing scholarship. Conclusions: Internal institutional support, external peer collaboration, and public examples of success are necessary to overcome barriers to scholarship integration in professional athletic training curricula

The Role Mentoring Plays in the Transition of Practice of Newly Credentialed Athletic Trainers

Context: Mentoring has been identified as an important method to support newly credentialed athletic trainers during their transition to practice. Gaining a better understanding of this relationship could provide valuable insights that may assist employers and professional programs to develop a plan, which could better facilitate the transition. Objective: To examine what aspects of the mentoring relationship provided the most benefit during transition to practice. Design: Grounded theory. Setting: Individual phone interviews. Patients or Other Participants: 13 athletic trainers who graduated from a professional master\u27s program, were certified between February and July of 2016, and obtained employment between July to August 11 of 2016 participated in this study (6 female, 7 male, 26±3 years; work settings included professional sports, college, secondary and middle school, and clinic). Data saturation guided the number of participants. Data Collection and Analysis: Phone interviews using a semi-structured interview guide were conducted at 3, 8 and twelve months of work experience. Data were analyzed using a constant comparative approach. Credibility was established through investigator triangulation, peer debriefing, and member checks. Results: Participants recognized the mentoring relationship as a foundational aspect of the transition to practice. Mentors should be available by phone, email, and/or text and to answer questions, provide feedback and/or discuss ideas. Participants want honest feedback, even when that feedback is constructively critical. Feedback was sought regarding topics such as patient care, communication, and networking. Participants needed reassurance and support from their mentor which helped to validate and improve confidence. Conclusions: Newly credentialed athletic trainers should seek a mentor who will be available to communicate in various ways and provide regular and constructive feedback. Future research should investigate how mentoring relationships influence other aspects of the transition such as patient care, overall job performance, turnover, and satisfaction