LM cathode thruster system Quarterly progress report, 4 Jan. 1969 - 4 Apr. 1970

Development of 20 cm liquid metal cathode thruster syste

A theoretical and semiemprical correction to the long-range dispersion power law of stretched graphite

In recent years intercalated and pillared graphitic systems have come under increasing scrutiny because of their potential for modern energy technologies. While traditional \emph{ab initio} methods such as the LDA give accurate geometries for graphite they are poorer at predicting physicial properties such as cohesive energies and elastic constants perpendicular to the layers because of the strong dependence on long-range dispersion forces. `Stretching' the layers via pillars or intercalation further highlights these weaknesses. We use the ideas developed by [J. F. Dobson et al, Phys. Rev. Lett. {\bf 96}, 073201 (2006)] as a starting point to show that the asymptotic $C_3 D^{-3}$ dependence of the cohesive energy on layer spacing $D$ in bigraphene is universal to all graphitic systems with evenly spaced layers. At spacings appropriate to intercalates, this differs from and begins to dominate the $C_4 D^{-4}$ power law for dispersion that has been widely used previously. The corrected power law (and a calculated $C_3$ coefficient) is then unsuccesfully employed in the semiempirical approach of [M. Hasegawa and K. Nishidate, Phys. Rev. B {\bf 70}, 205431 (2004)] (HN). A modified, physicially motivated semiempirical method including some $C_4 D^{-4}$ effects allows the HN method to be used successfully and gives an absolute increase of about $2-3$ to the predicted cohesive energy, while still maintaining the correct $C_3 D^{-3}$ asymptotics

Queen discrimination by honeybee (Apis mellifera L) workers

A simple new technique for testing worker honeybees' ability to distinguish between honeybee queens is presented. Two queens were caged separately with groups of young sibling workers which were the daughters of another queen. The cages were exposed to the same environmental odours for 10 days. When placed in the test apparatus and given a choice of both queens, workers segregated towards the queen with which they had been caged. This provides further evidence that the distinctive odour of an individual queen is probably partly inherited and is learned by workers. The nature and functioning of queen odours are discussed

Magnetic flux flow and superconductor stabilization Quarterly report, 1 Jan. - 31 Mar. 1968

Magnetic flux flow and stability of superconducting niobium titanium strip

Reliable and accurate diagnostics from highly multiplexed sequencing assays

Scalable, inexpensive, and secure testing for SARS-CoV-2 infection is crucial for control of the novel coronavirus pandemic. Recently developed highly multiplexed sequencing assays (HMSAs) that rely on high-throughput sequencing can, in principle, meet these demands, and present promising alternatives to currently used RT-qPCR-based tests. However, reliable analysis, interpretation, and clinical use of HMSAs requires overcoming several computational, statistical and engineering challenges. Using recently acquired experimental data, we present and validate a computational workflow based on kallisto and bustools, that utilizes robust statistical methods and fast, memory efficient algorithms, to quickly, accurately and reliably process high-throughput sequencing data. We show that our workflow is effective at processing data from all recently proposed SARS-CoV-2 sequencing based diagnostic tests, and is generally applicable to any diagnostic HMSA

Encouraging girls in math and science

The objective of this guide is to provide teachers with specific recommendations that can be carried out in the classroom without requiring systemic change. Other school personnel having direct contact with students, such as coaches, counselors, and principals, will also find the guide useful

Moored temperature and conductivity observations during AIWEX

This report presents observations from moorings of temperature, conductivity and pressure, made during the Arctic Internal Wave Experiment (AIWEX) in March-April 1985. The purpose of the temperature and conductivity measurements was to provide time series from which inferences could be made about the vertical displacement of the internal waves

“You gotta respect”: Mexican-origin Adolescents’ Perspectives on Respect in Organized Activities

Respect is crucial for promoting participation and positive experiences in organized activities, especially among ethnically diverse youth. However, little is known regarding how Mexican-origin adolescents conceptualize respect and specifically how to promote respect in activities. Guided by theory and previous research, we used qualitative content analysis to elucidate perspectives on respect and features involved in the development of respect in activities. Our sample consisted of 18 Mexican-origin 7th graders who resided in the Southwest of the U.S., an area with a history of inter-ethnic group tensions. The adolescents in this study described three different types of respect:  humanity respect, respect for culture, and linguistic respect. Potential features involved in the development of respect were identified, including individual- (e.g., moral virtues), contextual (e.g., welcoming atmosphere), and inter-personal (e.g., shared experiences) features. This study increases out depth of understanding of respect in activities, identifies areas for researchers to pursue in future research, and unveils potential implications for designing activities that promote positive, respectful relationships