Nanosatellite fabrication and analysis

The advancements in technologies used in the aerospace industry have allowed universities to experiment with and develop small-scale satellites. Universities are taking advantage of the relatively low development costs of nanosatellite programs to give students experience in the field of spacecraft design. The purpose of Santa Clara University\u27s team, Nanosatellite Fabrication and Analysis, is to create a process to expedite the design, analysis, and fabrication phase of nanosatellite structures for students working on future satellite missions. The objective is to design four baseline nanosatellite structures to accommodate a range of potential missions where the designs are simple enough to be completely fabricated by students utilizing only the tools found in the Santa Clara University\u27s machine lab. Finite element analysis is conducted to ensure the designs meet NASA standards for natural frequency and that it can survive the forces it is subjected to during a launch. SatTherm, an easy to use thermal analysis tool for small spacecrafts, was used to conduct initial thermal simulations of the nanosatellite to determine the type of thermal components that will work for future missions. The success of team Nanosatellite Fabrication and Analysis proves that students can fabricate the structural frame of a nanosatellite using only the tools available in SCU\u27s machine lab

The 2-generalized knot group determines the knot

Generalized knot groups $G_n(K)$ were introduced independently by Kelly (1991) and Wada (1992). We prove that $G_2(K)$ determines the unoriented knot type and sketch a proof of the same for $G_n(K)$ for $n>2$.Comment: 4 page

Labour Exploitation and Work-Based Harm

Labour exploitation is a highly topical though complex issue that has international resonance for those concerned with social justice and social welfare, but there is a lack of research available about it. This book, part of the Studies in Social Harm series, is the first to look at labour exploitation from a social harm perspective, arguing that, as a global social problem, it should be located within the broader study of work-based harm. Written by an expert in policy orientated research, he critiques existing approaches to the study of workplace exploitation, abuse and forced labour. Mapping out a new sub-discipline, this innovative book aims to shift power from employers to workers to reduce levels of labour exploitation and work-based harm. It is relevant to academics from many fields as well as legislators, policy makers, politicians, employers, union officials, activists and consumers

Hourglass

pages 60-6

Regulation of Trading in Ginnie Maes

While Ginnie Maes have undergone spectacular growth, the trading markets for these government-sponsored securities have spawned a number of financial scandals, thus becoming a cynosure of regulatory scrutiny. The author explores these markets and their problems and analyzes the responses to the problems by regulators and participants

Labour Exploitation and Work-Based Harm

Labour exploitation is a highly topical though complex issue that has international resonance for those concerned with social justice and social welfare, but there is a lack of research available about it. This book, part of the Studies in Social Harm series, is the first to look at labour exploitation from a social harm perspective, arguing that, as a global social problem, it should be located within the broader study of work-based harm. Written by an expert in policy orientated research, he critiques existing approaches to the study of workplace exploitation, abuse and forced labour. Mapping out a new sub-discipline, this innovative book aims to shift power from employers to workers to reduce levels of labour exploitation and work-based harm. It is relevant to academics from many fields as well as legislators, policy makers, politicians, employers, union officials, activists and consumers

Scattered Disk Dynamics: The Mapping Approach

We derive, and discuss the properties of, a symplectic map for the dynamics of bodies on nearly parabolic orbits. The orbits are perturbed by a planet on a circular, coplanar orbit interior to the pericenter of the parabolic orbit. The map shows excellent agreement with direct numerical integrations and elucidates how the dynamics depends on perturber mass and pericenter distance. We also use the map to explore the onset of chaos, statistical descriptions of chaotic transport, and sticking in mean-motion resonances. We discuss implications of our mapping model for the dynamical evolution of the solar system's scattered disk and other highly eccentric trans-Neptunian objects.Comment: submitted to MNRA

La información de los medios de comunicación sobre la escasez de mano de obra en la horticultura del Reino Unido durante la pandemia de COVID-19: el uso de metáforas bélicas en la revelación selectiva de la precariedad laboral/de los trabajadores

Over the 21st century almost all of the UK’s harvest labour has been foreign-born. The COVID-19 crisis (from March 2020) threatened UK food security by limiting this supply of low-wage foreign labour into the UK. In response a national campaign was launched to get a domestic ‘Land Army’ to ‘Feed the Nation’ and ‘Pick for Britain’ (the three main epithets used). The article profiles this campaign. We show that the COVID-19 crisis put low-wage harvest labour into the spotlight when this labour is usually hidden from public view. Potentially, such unveiling could have challenged the economics of the food production system. However, we argue that the rupture was stage-managed by invoking a wartime rhetoric and three key concomitant roles of the victim-hero farmer, the good migrant, and the reluctant British-based understudy. These emphasised the valiant nature of harvest work and framed migrant workers as (temporary) heroes helping to save the nation. In contrast, British-based workers’ reluctance to embrace precarious work was framed as personal deficiency rather than a structural failure to create decent jobs. In all, the spotlight cast on the low-wage rural economy by the COVID-19 crisis was carefully targeted and stage-managed and did not challenge the persistence of precarious horticultural work.A lo largo del siglo XXI, casi toda la mano de obra de las cosechas del Reino Unido ha sido de origen extranjero. La crisis de la COVID-19 (a partir de marzo de 2020) amenazó la seguridad alimentaria del Reino Unido al limitar este suministro de mano de obra extranjera con bajos salarios en el Reino Unido. En respuesta, se lanzó una campaña nacional para conseguir un “ejército de tierra” nacional que “alimentara a la nación” y “recogiera para Gran Bretaña” (los tres principales epítetos utilizados). El artículo describe esta campaña. Se muestra que la crisis del COVID-19 puso en el punto de mira la mano de obra de las cosechas con bajos salarios, cuando esta mano de obra suele estar oculta a la vista del público. Potencialmente, esta revelación podría haber cuestionado la economía del sistema de producción de alimentos. Sin embargo, sostenemos que la ruptura se escenificó invocando una retórica bélica y tres papeles clave concomitantes: el agricultor víctima-héroe, el buen emigrante y el suplente reacio de origen británico. Esto enfatiza la naturaleza valiente del trabajo de la cosecha y enmarca a los trabajadores inmigrantes como héroes (temporales) que ayudan a salvar la nación. Por el contrario, la reticencia de los trabajadores británicos a aceptar el trabajo precario se presentaba como una deficiencia personal y no como un fracaso estructural en la creación de empleos decentes. En definitiva, la crisis de la COVID-19 puso el foco de atención en la economía rural de bajos salarios y fue cuidadosamente dirigida y gestionada, sin cuestionar la persistencia del trabajo hortícola precario