Analysis of high quality superconducting resonators: consequences for TLS properties in amorphous oxides

$1/f$ noise caused by microscopic Two-Level Systems (TLS) is known to be very detrimental to the performance of superconducting quantum devices but the nature of these TLS is still poorly understood. Recent experiments with superconducting resonators indicates that interaction between TLS in the oxide at the film-substrate interface is not negligible. Here we present data on the loss and $1/f$ frequency noise from two different Nb resonators with and without Pt capping and discuss what conclusions can be drawn regarding the properties of TLS in amorphous oxides. We also estimate the concentration and dipole moment of the TLS.Comment: 8 pages, 5 figure

Study of small turbofan engines applicable to general-aviation aircraft

The applicability of small turbofan engines to general aviation aircraft is discussed. The engine and engine/airplane performance, weight, size, and cost interrelationships are examined. The effects of specific engine noise constraints are evaluated. The factors inhibiting the use of turbofan engines in general aviation aircraft are identified

Behaviors, Contextual Influences, and Consequences: Relationships that affect Student Decision-making of Academic Misconduct in College

Academic misconduct on college campuses is not a new challenge for higher education institutions but an old problem that has changed considerably. Student demonstrations of academic misconduct behaviors have evolved, making it difficult for institutions to consistently keep well-informed on how students cheat to effectively respond to violations of academic integrity policies. This study investigates the relationships between misbehaviors, their associated consequences, and influences to prevent, respond to, and reduce academic misconduct at a large research-intensive university. This quantitative study uses institutional academic misconduct reports between 2017 and 2020 and student surveys to examine significant relationships in the decision-making process of academic misconduct. Evidence shows that student characteristics and behaviors were significant when assigning sanctions to respond to cases of academic misconduct. According to the data, students had a general understanding of what constitutes academic misconduct when behaviors were clearly defined as wrong, but in instances of group work when there was no direct/active participation in the behavior, students could not differentiate whether it was academic misconduct. Additionally, instructor support and adequate time allocation to complete assignments were important factors when deciding whether to cheat. Overall, consistent communication of expectations in the classroom and providing the support to help students understand academic misconduct remain important in preventing, responding to, and reducing academic misconduct

EBSD mapping of herringbone domain structures in tetragonal piezoelectrics

Herringbone domain structures have been mapped using electron backscatter diffraction (EBSD) in two tetragonal piezoelectrics, lead zirconate titanate, [Pb(Zr,Ti)O<sub>3</sub>] and bismuth ferrite – lead titanate, [(PbTi)<sub>0.5</sub>(BiFe)<sub>0.5</sub>O<sub>3</sub>]. Analysis of the domain misorientations across the band junctions shows that the structures correspond very well to crystallographic models. High resolution mapping with a 20 nm step size allowed the crystal rotation across one of these band junctions in lead zirconate titanate to be studied in detail and allowed an improved estimation of the peak strain at the junction, of 0.56 GPa. The significance of this for crack nucleation and propagation in such materials is discussed

The effect of delayed harvest upon yield of grain

In 1927 yield and moisture data were secured at semi-weekly harvest intervals for four varieties of oats, two of winter wheat and two of barley. In 1928 this experiment was repeated using six varieties of oats, two of winter wheat and four of barley. The data secured in these studies show increases in yields which indicate that photosynthesis and translocation of food material to the kernel may continue much longer than has been previously reported. The yields continued to rise until the moisture content of the grain had fallen to percentages varying, in 1927, between 33.6 and 10.0, and in 1928 between 45.0 and 19.4, as shown in table I, page 335. The results of these experiments indicate that a considerable part of the grain crop is usually harvested before maximum production has been attained. In 1927 several of the varieties increased in yield as much as 10 percent after the date on which they normally would have been harvested. In some cases these increases extended over a period of 10 days. In 1928, probably due to intermittent storms, the increases were much smaller than in the previous year, but continued over approximately the same length of time. The results confirm the accepted idea that the corresponding losses from delayed harvesting are lower for wheat than for other grains. The experiments with oats show a distinct relation between varieties and the length of profitable harvest period

'Deixe-me ganhar…, mas se não posso ganhar, deixe-me ser corajoso para tentar': desafios dos atletas Paralímpicos em Sri Lanka

Comparing abled-bodied athletes and Olympic sports with disabled athletes and Paralympic sports, the latter are relatively less popular and receive proportionally less funding from formal sport agencies and government sector. The title, analyze in challenges of Paralympic athletes in Sri Lanka, was described specific objective such as to provide a pathway of eliminate or minimize the impact of the given challenges and identify the sporting needs and desires of Paralympic athlete across the area. Disabled athletes who is represented Paralympic were highlighted. The challenges faced by the athletes in study could be categorized as physical, economic and social. According to analyzed results problem with facility and equipment availability. Study was also concerned about the negative attitude displayed towards then as support of sponsorship and public and media. Especially in Sri Lanka there is lack of disabled athletes’ researches. Accordingly, there is a space to be filled up and will be answered by this study. Using the methods of investigative journalism and secondary data analysis were used of this study. As this study is analytical in nature as far as possible an attempt was made to collect secondary data. Previous studies were carried out provide a conceptual background of the study. Comparando atletas con discapacidades físicas y deportes olímpicos con atletas con discapacidades y deportes paralímpicos, estos últimos son relativamente menos populares y reciben proporcionalmente menos fondos de las agencias deportivas formales y del sector gubernamental. El título, analizó los desafíos de los atletas paralímpicos en Sri Lanka, se describió como un objetivo específico, para el cual es proporcionar una forma de eliminar o minimizar el impacto de los desafíos presentados e identificar las necesidades y deseos deportivos de los atletas paralímpicos en toda el área. Se destacaron los atletas con discapacidad representados en el deporte paralímpico. Los desafíos que enfrentan los atletas en estudio pueden clasificarse en físicos, económicos y sociales. Según los resultados analizados, el problema está en la disponibilidad de instalaciones y equipos. El estudio también tuvo que ver con la actitud negativa mostrada hacia el patrocinio, el público y los medios. Especialmente en Sri Lanka, hay una falta de investigación sobre atletas con discapacidades. En este sentido, hay un espacio para ser llenado y será respondido por este estudio. El periodismo de investigación y los métodos de análisis de datos secundarios se utilizaron en este estudio. Como este estudio es de naturaleza analítica, en la medida de lo posible, se intentó recolectar datos secundarios. Se han llevado a cabo estudios previos y proporcionan una base conceptual para el estudio.Comparando atletas com deficiência física e esportes olímpicos com atletas com deficiência e esportes paraolímpicos, estes últimos são relativamente menos populares e recebem proporcionalmente menos financiamento de agências esportivas formais e do setor governamental. O título, analisado os desafios dos atletas paraolímpicos no Sri Lanka, foi descrito como objetivo específico, para o qual é fornecer um caminho para eliminar ou minimizar o impacto dos desafios apresentados e identificar as necessidades e desejos esportivos dos atletas paraolímpicos em toda a área. Os atletas com deficientes representados no esporte paraolímpicos foram destacados. Os desafios enfrentados pelos atletas em estudo podem ser classificados como físicos, econômicos e sociais. De acordo com os resultados analisados, o problema é com a disponibilidade de instalações e equipamentos. O estudo também se preocupou com a atitude negativa exibida em relação ao patrocínio, ao público e à mídia. Especialmente no Sri Lanka, faltam pesquisas de atletas com deficiência. Nesse sentido, existe um espaço a ser preenchido e será respondido por este estudo. Métodos de jornalismo investigativo e análise de dados secundários foram utilizados neste estudo. Como este estudo é de natureza analítica, tanto quanto possível, foi feita uma tentativa de coletar dados secundários. Estudos anteriores foram realizados, e fornecem uma base conceitual do estudo

SPINO-PELVIC KINEMATICS AND TRUNK MUSCLE ACTIVATION IN PROLONGED ERGOMETER ROWING: MECHANICAL ETIOLOGY OF NON-SPECIFIC LOW BACK PAIN IN ADOLESCENT ROWERS

The aim of this study was to determine whether adolescent rowers with and without low back pain (LBP) displayed differences in spino-pelvic kinematics and trunk muscle activation during prolonged ergometer rowing. Ten rowers with LBP and twelve rowers without LBP performed a 20 minute ergometer trial with kinematics, muscle activation and self reported perception of pain data (VAS) collected during the trial. Results of this study show that rowers with LBP postured their lumbar spine in flexion for a greater proportion of the drive phase and nearer to their end range of flexion when compared to those without LBP. This study highlights potential mechanisms for the ramping of back pain in adolescent rowers

SPINO-PELVIC KINEMATICS AND TRUNK MUSCLE ACTIVATION IN PROLONGED ERGOMETER ROWING: MECHANICAL ETIOLOGY OF NON-SPECIFIC LOW BACK PAIN IN ADOLESCENT ROWERS

The aim of this study was to determine whether adolescent rowers with and without low back pain (LBP) displayed differences in spino-pelvic kinematics and trunk muscle activation during prolonged ergometer rowing. Ten rowers with LBP and twelve rowers without LBP performed a 20 minute ergometer trial with kinematics, muscle activation and self reported perception of pain data (VAS) collected during the trial. Results of this study show that rowers with LBP postured their lumbar spine in flexion for a greater proportion of the drive phase and nearer to their end range of flexion when compared to those without LBP. This study highlights potential mechanisms for the ramping of back pain in adolescent rowers

Evaluation of diffusive gradients in thin-films using a Diphonix® resin for monitoring dissolved uranium in natural waters

Commercially available Diphonix® resin (TrisKem International) was evaluated as a receiving phase for use with the diffusive gradients in thin-films (DGT) passive sampler for measuring uranium. This resin has a high partition coefficient for actinides and is used in the nuclear industry. Other resins used as receiving phases with DGT for measuring uranium have been prone to saturation and significant chemical interferences. The performance of the device was evaluated in the laboratory and in field trials. In laboratory experiments uptake of uranium (all 100% efficiency) by the resin was unaffected by varying pH (4–9), ionic strength (0.01–1.00 M, as NaNO3) and varying aqueous concentrations of Ca2+ (100–500 mg L−1) and HCO3− (100–500 mg L−1). Due to the high partition coefficient of Diphonex®, several elution techniques for uranium were evaluated. The optimal eluent mixture was 1 M NaOH/1 M H2O2, eluting 90% of the uranium from the resin. Uptake of uranium was linear (R2 = 0.99) over time (5 days) in laboratory experiments using artificial freshwater showing no saturation effects of the resin. In field deployments (River Lambourn, UK) the devices quantitatively accumulated uranium for up to 7 days. In both studies uptake of uranium matched that theoretically predicted for the DGT. Similar experiments in seawater did not follow the DGT theoretical uptake and the Diphonix® appeared to be capacity limited and also affected by matrix interferences. Isotopes of uranium (U235/U238) were measured in both environments with a precision and accuracy of 1.6–2.2% and 1.2–1.4%, respectively. This initial study shows the potential of using Diphonix®-DGT for monitoring of uranium in the aquatic environment

Cyberbullying: A Brief Review

The objective of this review is to summarize the prevalence of Internet use among the adolescent population and the growing threat of cyberbullying. This manuscript also addresses the difference between cyberbullying and traditional bullying and the negative psychological effects that result from cyberbullying. Important intervention and prevention strategies for parents and school officials are noted as well