Equation of State and Isentropic Releasem of Aluminum Foam and Fluoropolymer Composites

There is considerable interest in developing a better understanding of the dynamic behavior of heterogeneous materials. This study investigates and compares the dynamic response of 20 and 47% dense aluminum foam systems with and without a polytetrafluoroethylene (PTFE or Teflon) fill. Experiments on 47% foam were conduced in a 60 mm bore gun in a reverse ballistic configuration at velocities ranging from 350 m/s to 2.5 km/s. The particle velocity of the backside of the anvil was monitored with a VISAR system. Mesoscale simulations are in good agreement with the available experimental data. Both the experimental and simulated data are in good agreement with an analytic release isentrope when released from Hugoniot stress levels less than 5 GPa. However there is significant deviation from the analytic isentrope as the Hugoniot stress level is increased

TIME AND BIOGRAPHY IN DIABETIC EXPERIENCE

This paper offers a preliminary analysis of temporality in the lives of diabetics. It is argued that time unites the various aspects of diabetic experience, including the disease itself, and the social, emotional, institutional, and technological arenas of that experience. A depiction of diabetic experience is rendered by focusing on family life, time in the individuals' sense of being, and biographical time. It is concluded that diabetes transforms time for the person and for patterns ofgroup life

Elements of the Perpetuation of Dependency in a Psychiatric Halfway House

Halfway houses are intended as helping institutions for those who are attempting to make the transition from institutionalized mental health facilities to autonomous living in the community. In spite of the manifest goal to produce independence for its residents, however, the halfway house contributes to patterns of dependency. In addition to the network nature of mental health care, we identify three dependency-perpetuating elements: role commitments, language, and mixed messages. These elements are analyzed as both social organizational and social psychological processes, and their implications are discussed

The case of the singing vortex’.

A relatively high amplitude, discrete tone is radiated from fully developed tip vortex cavitation under certain conditions. The phenomenon of the "singing vortex" was first reported b

Comparison of traditional intranasal and aerosol inhalation inoculation of mice with influenza A viruses

AbstractIntranasal instillation of virus in a liquid suspension (IN) is the most frequently employed method to inoculate small mammalian models with influenza virus, but does not reflect a natural route of exposure. In contrast, inoculation via aerosol inhalation (AR) more closely resembles human exposure to influenza virus. Studies in mice have yielded conflicting results regarding virulence induced by virus inoculated by these routes, and have not controlled for potential strain-specific differences, or examined contemporary influenza viruses and avian viruses with pandemic potential. We used a whole-body AR inoculation method to compare infectivity and disease progression of a highly pathogenic H5N1, a low pathogenic H7N9, and a 2009 H1N1 virus with traditional IN inoculation in the mouse model. Generally comparable levels of morbidity and mortality were observed with all viruses examined using either inoculation route, indicating that both IN and AR delivery are appropriate for murine studies investigating influenza virus pathogenicity

Effect of high pressure on the vibrational modes and the energy gap of ZnP₂

The pressure dependence of the vibrational modes in ZnP2 has been investigated by Raman Spectroscopy using a diamond anvil cell, up to 150 kbar pressure. The intrachain phosphorus modes exhibit a strong pressure dependence whereas the low frequency Zn-P modes soften very slightly under pressure. For a crystal which is treated as a molecular crystal this is an unexpected result. It is suggested that the behaviour may be due to a buckling of the phosphorus chain, or due to a double bond promotion between P atoms, or a charge transfer under pressure. The shift in the energy gap has also been measured to 100 kbar hydrostatic pressure. There is a small initial blue shift which gradually changes over to a red shift. However the whole shift in 100 kbar is quite small. Combining the (dEg/dP) T with the published (dEg/dT) P the thermal expansion contribution and the electron-phonon interaction contribution were evaluated. The latter dominates the total (dEg/dT) P of ZnP2

Impact of covid-19 pandemic on remote monitoring of cardiac implantable electronic devices in italy: Results of a survey promoted by aiac (italian association of arrhythmology and cardiac pacing)

11noopenThe COVID-19 pandemic has had a profound impact on the organisation of health care in Italy, with an acceleration in the development of telemedicine. To assess the impact of the COVID-19 pandemic on the spread of remote monitoring (RM) of cardiac implantable electronic devices (CIEDs) in Italy, a survey addressed to cardiologists operating in all Italian CIED-implanting centres was launched. A total of 127 cardiologists from 116 Italian arrhythmia centres took part in the survey, 41.0% of all 283 CIED-implanting centres operating in Italy in 2019. All participating centres declared to use RM of CIEDs. COVID-19 pandemic resulted in an increase in the use of RM in 83 (71.6%) participating centres. In a temporal perspective, an increase in the median number of patients per centre followed up by RM was found from 2012 to 2017, followed by an exponential increase from 2017 to 2020. In 36 participating centres (31.0%) a telehealth visits service was activated as a replacement for in-person outpatient visits (in patients with or without CIED) during the COVID-19 pandemic. COVID-19 pandemic has caused an acceleration in the use of RM of CIEDs and in the use of telemedicine in the clinical practice of cardiology.openMaines M.; Palmisano P.; Del Greco M.; Melissano D.; De Bonis S.; Baccillieri S.; Zanotto G.; D'onofrio A.; Ricci R.P.; De Ponti R.; Boriani G.Maines, M.; Palmisano, P.; Del Greco, M.; Melissano, D.; De Bonis, S.; Baccillieri, S.; Zanotto, G.; D'Onofrio, A.; Ricci, R. P.; De Ponti, R.; Boriani, G