Study of adhesion and cohesion in vacuum Final report

Vacuum metal-metal bonding tests to determine conditions of accidental adhesion of spacecraft structural material

Study of adhesion and cohesion in vacuum summary report 1 jul. 1963 - 30 jun. 1964

Adhesion and cohesion of metal couples in vacuum chambe

Study of adhesion and cohesion in vacuum fifth quarterly report, 1 oct. 1964 - 1 jan. 1965

Adhesion and cohesion tests under static loading conditions in vacuum - aluminum and titanium alloys and copper bondin

Hard X-ray emission from the eastern jet of SS 433 powering the W50 `Manatee' nebula: Evidence for particle re-acceleration

We present a broadband X-ray study of W50 (`the Manatee nebula'), the complexregion powered by the microquasar SS 433, that provides a test-bed for severalimportant astrophysical processes. The W50 nebula, a Galactic PeVatroncandidate, is classified as a supernova remnant but has an unusual double-lobedmorphology likely associated with the jets from SS 433. Using NuSTAR,XMM-Newton, and Chandra observations of the inner eastern lobe of W50, we havedetected hard non-thermal X-ray emission up to $\sim$30 keV, originating from afew-arcminute size knotty region (`Head') located $\lesssim$ 18$^{\prime}$ (29pc for a distance of 5.5 kpc) east of SS 433, and constrain its photon index to1.58$\pm$0.05 (0.5-30 keV band). The index gradually steepens eastward out tothe radio `ear' where thermal soft X-ray emission with a temperature$kT$$\sim$0.2 keV dominates. The hard X-ray knots mark the location ofacceleration sites within the jet and require an equipartition magnetic fieldof the order of $\gtrsim$12$\mu$G. The unusually hard spectral index from the`Head' region challenges classical particle acceleration processes and pointsto particle injection and re-acceleration in the sub-relativistic SS 433 jet,as seen in blazars and pulsar wind nebulae.<br

Lifelines COVID-19 cohort:investigating COVID-19 infection and its health and societal impacts in a Dutch population-based cohort

Purpose The Lifelines COVID-19 cohort was set up to assess the psychological and societal impacts of the COVID-19 pandemic and investigate potential risk factors for COVID-19 within the Lifelines prospective population cohort.Participants Participants were recruited from the 140 000 eligible participants of Lifelines and the Lifelines NEXT birth cohort, who are all residents of the three northern provinces of the Netherlands. Participants filled out detailed questionnaires about their physical and mental health and experiences on a weekly basis starting in late March 2020, and the cohort consists of everyone who filled in at least one questionnaire in the first 8 weeks of the project.Findings to date &gt;71 000 unique participants responded to the questionnaires at least once during the first 8 weeks, with &gt;22 000 participants responding to seven questionnaires. Compiled questionnaire results are continuously updated and shared with the public through the Corona Barometer website. Early results included a clear signal that younger people living alone were experiencing greater levels of loneliness due to lockdown, and subsequent results showed the easing of anxiety as lockdown was eased in June 2020.Future plans Questionnaires were sent on a (bi)weekly basis starting in March 2020 and on a monthly basis starting July 2020, with plans for new questionnaire rounds to continue through 2020 and early 2021. Questionnaire frequency can be increased again for subsequent waves of infections. Cohort data will be used to address how the COVID-19 pandemic developed in the northern provinces of the Netherlands, which environmental and genetic risk factors predict disease susceptibility and severity and the psychological and societal impacts of the crisis. Cohort data are linked to the extensive health, lifestyle and sociodemographic data held for these participants by Lifelines, a 30-year project that started in 2006, and to data about participants held in national databases