PETREL: Platform for Extra and Terrestrial Remote Examination with LCTF

A small satellite ”PETREL” for UV astronomy and remote sensing with ”tunable” multi-spectral cameras conducted by an academia-industrial collaboration is presented. This project was originally proposed by an astronomer who desired a satellite for exploration of explosive objects in ultraviolet. To avoid the earthshine the astronomical observations are scheduled only in the nighttime. To utilize the daytime more electively we conceived a plan of ”satellite sharing” with the industrial collaborators, that can also reduce the developing cost drastically. The daytime mission is spectroscopy that is one of the potential fields in terms of data business, because that can provide chemical and biological information on the surface of the earth. We employ multi-spectral cameras making use of liquid crystal tunable filters (LCTFs) that enable adaptive observations at the optimized wave-bands for each targets. In 2020, this remote-sensing project and ultraviolet astronomy mission were accepted as a small satellite project of JAXA’s Innovative Satellite Technology Demonstration program and as an ISAS/JAXA’s small-scale program, respectively. This satellit

Microdosimetric Measurements and Estimation of Human Cell Survival for Heavy-Ion Beams

The microdosimetric spectra for high-energy beams of photons and proton, helium, carbon, neon, silicon and iron ions (LET = 0.5-880 keV/um) were measured with a spherical-walled tissue-equivalent proportional counter at various depths in a plastic phantom. Survival curves for human tumor cells were also obtained under the same conditions. Then the survival curves were compared with those estimated by a microdosimetric model based on the spectra and the biological parameters for each cell line. The estimated alpha terms of the liner-quadratic model with a fixed beta value reproduced the experimental results for cell irradiation for ion beams with LETs of less than 450 keV/um, except in the region near the distal peak

<Report>A case study of the nursing staff on the neuropsychaiatric ward in Osaka Medical College

A study was conducted at the Department of Neuropsychiatry, Osaka Medical College between June 1 and October 31, 1991. The study evaluated the stress level of the nursing staff in the department using a questionnaire, and intervention was taken in improving problem areas in order to alleviate the stress level. The department has 56 beds and an outpatient unit. The nursing staff comprises of 16 state registered nurses and 4 assistant nurses with prefectural registration. The nurses play multiple roles and some areas of their work are not clearly defined. They have a heavy workload with high demand, yet their control over their work is limited. This problem is inherent in medical school hospitals as the nurses, in addition to their clinical work, take an active part in teaching student nurses as well as in assisting junior physicians with limited experience. The results of the questionnaire showed that the key problem areas were poor intepersonal communication, lack of influence in decision-making, and an inefficient hierarchal system. These factors gave the staff a feeling of helplessness, contributing to the high stress level. In order to reduce the stress, informal meetings were held to encourage staff members to share their ideas regardless of their position. Ward physicians were encouraged to be more precise in their instructions and to provide opportunities for the nursing staff to discuss problems. As a result, the overall atmosphere at the workplace improved. A seemingly well-functioning team of professionals, when investigated, reveals that there are many problematic issues. In a hierarchal system, there inherently is some resentment within the team. However, better intradepartmental communication reduces such resentment and contribute to the reduction of stress