Thermodielectric radiometer

Radiometer measures microsecond pulses of radiant flux in the presence of electromagnetic noise. It consists of a charged capacitor that delivers a voltage pulse proportional to the thermally induced depolarization of its polymeric dielectric

Inside the Bondi radius of M87

Chandra X-ray observations of the nearby brightest cluster galaxy M87 resolve the hot gas structure across the Bondi accretion radius of the central supermassive black hole, a measurement possible in only a handful of systems but complicated by the bright nucleus and jet emission. By stacking only short frame-time observations to limit pileup, and after subtracting the nuclear PSF, we analysed the X-ray gas properties within the Bondi radius at 0.12-0.22 kpc (1.5-2.8 arcsec), depending on the black hole mass. Within 2 kpc radius, we detect two significant temperature components, which are consistent with constant values of 2 keV and 0.9 keV down to 0.15 kpc radius. No evidence was found for the expected temperature increase within ~0.25 kpc due to the influence of the SMBH. Within the Bondi radius, the density profile is consistent with $\rho\propto r^{-1}$. The lack of a temperature increase inside the Bondi radius suggests that the hot gas structure is not dictated by the SMBH's potential and, together with the shallow density profile, shows that the classical Bondi rate may not reflect the accretion rate onto the SMBH. If this density profile extends in towards the SMBH, the mass accretion rate onto the SMBH could be at least two orders of magnitude less than the Bondi rate, which agrees with Faraday rotation measurements for M87. We discuss the evidence for outflow from the hot gas and the cold gas disk and for cold feedback, where gas cooling rapidly from the hot atmosphere could feed the cirumnuclear disk and fuel the SMBH. At 0.2 kpc radius, the cooler X-ray temperature component represents ~20% of the total X-ray gas mass and, by losing angular momentum to the hot gas component, could provide a fuel source of cold clouds within the Bondi radius.Comment: 14 pages, 8 figures, accepted by MNRA

Comparison of data on Mutation Frequencies of Mice Caused by Radiation - Low Dose Model -

We propose LD(Low Dose) model, the extension of LDM model which was proposed in the previous paper [Y. Manabe et al.: J. Phys. Soc. Jpn. 81 (2012) 104004] to estimate biological damage caused by irradiation. LD model takes account of all the considerable effects including cell death effect as well as proliferation, apoptosis, repair. As a typical example of estimation, we apply LD model to the experiment of mutation frequency on the responses induced by the exposure to low levels of ionizing radiation. The most famous and extensive experiments are those summarized by Russell and Kelly [Russell, W. L. & Kelly, E. M: Proc. Natl Acad. Sci. USA 79 (1982) 539-541], which are known as 'Mega-mouse project'. This provides us with important information of the frequencies of transmitted specific-locus mutations induced in mouse spermatogonia stem-cells. It is found that the numerical results of the mutation frequency of mice are in reasonable agreement with the experimental data: the LD model reproduces the total dose and dose rate dependence of data reasonably. In order to see such dose-rate dependence more explicitly, we introduce the dose-rate effectiveness factor (DREF). This represents a sort of preventable effects such as repair, apoptosis and death of broken cells, which are to be competitive with proliferation effect of broken cells induced by irradiation.Comment: subimitting to J. Phys. Soc. Jpn, 32 pages, 8 figure

Stratospheric measurements of continuous absorption near 2400 cm^-1

Solar occultation spectra obtained with a balloon-borne interferometer have been used to study continuous absorption by N2 and CO2 near 2400 cm^-1 in the lower stratosphere. Synthetic continuum transmittances, calculated from published coefficients for far-wing absorption by CO2 lines and for pressure-induced absorption by the fundamental band of N2, are in fair agreement with the observed stratospheric values. The continuum close to the ν3 R-branch band head of CO2 is sensitive to the CO2 far-wing line shape. Therefore, given highly accurate knowledge of the N2 continuum from laboratory data, high-resolution stratospheric spectra provide a sensitive means for in situ testing of various air-broadened CO2 line shapes at low temperatures

Analysis of Work-related Injury and Illness, 2001 to 2014. Sectoral Analysis No. 3: Industry Sector. ESRI and Health and Safety Authority, April 2018

The following analysis draws on the CSO’s Quarterly National Household Survey (QNHS) to explore workrelated injuries and illnesses in the industry sector (see Box 1 for details on data sources and measures). The results are based on workers’ self-reports of work-related illness and injury. All injuries and illnesses are included, regardless of whether or not they resulted in an absence from work as many people continue to work while sick or injured. Findings across the economy as a whole are explored in Russell et al. (2015 and 2016).i This research briefing provides a within-sector picture of the industry sector over the period 2001–2014. This sector consists of manufacturing, utilities and mining

Analysis of Work-related Injury and Illness, 2001 to 2014. Sectoral Analysis No. 2: Construction Sector. ESRI and Health and Safety Authority, April 2018

The following analysis draws on the Central Statistics Office’s (CSO) Quarterly National Household Survey (QNHS) to explore work-related accidents and illnesses in the construction sector (see Box 1 for details on data sources and measures). The results are based on workers’ self-reports of work-related illness and injury. All injuries and illnesses are included, regardless of whether or not they resulted in an absence from work, as many people continue to work while sick or injured. Findings across the economy as a whole are explored in Russell et al. (2015 and 2016).i This research briefing provides a within-sector picture of the construction sector over the period 2001–2014

Analysis of Work-related Injury and Illness, 2001 to 2014. Sectoral Analysis No. 4: Agriculture, Forestry and Fishing Sector. ESRI and Health and Safety Authority, April 2018

The following analysis draws on the CSO’s Quarterly National Household Survey (QNHS) to explore workrelated accidents and illnesses in the agriculture, forestry and fishing sector (see Box 1 for details on data sources and measures). The results are based on workers’ self-reports of work-related illness and injury. All injuries and illnesses are included, regardless of whether or not they resulted in an absence from work, as many people continue to work while sick or injured. Findings across the economy as a whole are explored in Russell et al. (2015 and 2016). This research briefing provides a within-sector picture of the agriculture, forestry and fishing sector over the period 2001–2014