Analysis of Charging of the HTV-4 Based on On-Orbit Data

After three H-II transfer vehicles (HTVs) had finished their mission to resupply the International Space Station (ISS), NASA requested data of the HTV\u27s potential to evaluate the charging/discharging process that occurs when the HTV docks to the ISS. To measure these data, a new instrument was installed on the fourth HTV. This instrument allows us to measure the HTV-4 surface potential relative to the surrounding plasma, and is called advanced technology on-orbit test instrument for space environment-mini (ATOTIE-mini). The ATOTIE-mini observed the HTV\u27s local potential in the orbit for more than one month. The measured potential during the HTV solo-flight phase varied between -30 and -60 V in sunlight and was about 0 V in eclipse conditions. The HTV\u27s potential during the time when it was docked to the ISS followed the ISS\u27s potential with an almost constant offset of about 10 V. The data measured by ATOTIE-mini are consistent with those measured by the floating potential measurement unit on the ISS, and thus are considered reliable. The HTV\u27s potential level itself was acceptable for ISS. Note that the solar array panels can generate up to approximately 120 V, which is much larger than the absolute potential range in sunshine. We analyze the potential distribution on the HTV surface by a multi-utility spacecraft charging analysis tool, because ATOTIE-mini can only observe one point on the HTV surface. The analysis results are discussed with respect to the flight attitude

Primary Gastric T Cell Lymphoma with Epstein-Barr Virus Infection.

Primary gastric T cell malignant lymphomas are very rare. Here we report a case of primary gastric T cell lymphoma infected with Epstein-Barr virus (EBV). Histologic and immunohistologic features, positive for CD45RO/UCHL1 and negative for CD20/L26, showed this tumor to be a diffuse, large cell type, malignant lymphoma with a T cell phenotype. Genotypic analysis by the South-ern blot method, demonstrating T cell receptor gene rearrangement and a germ-line configuration of the immunoglobulin gene, also supported the T cell origin of this tumor. EBV DNA was detected by polymerase chain reaction and in situ hybridization against EBER1 demonstrated that EBV was located in the lymphoma cells. This is the first Japanese case report of primary gastric malig-nant lymphoma of T cell origin infected with EBV

Analysis of Charging of the HTV-4 Based on On-Orbit Data

After three H-II transfer vehicles (HTVs) had finished their mission to resupply the International Space Station (ISS), NASA requested data of the HTV's potential to evaluate the charging/discharging process that occurs when the HTV docks to the ISS. To measure these data, a new instrument was installed on the fourth HTV. This instrument allows us to measure the HTV-4 surface potential relative to the surrounding plasma, and is called advanced technology on-orbit test instrument for space environment-mini (ATOTIE-mini). The ATOTIE-mini observed the HTV's local potential in the orbit for more than one month. The measured potential during the HTV solo-flight phase varied between -30 and -60 V in sunlight and was about 0 V in eclipse conditions. The HTV's potential during the time when it was docked to the ISS followed the ISS's potential with an almost constant offset of about 10 V. The data measured by ATOTIE-mini are consistent with those measured by the floating potential measurement unit on the ISS, and thus are considered reliable. The HTV's potential level itself was acceptable for ISS. Note that the solar array panels can generate up to approximately 120 V, which is much larger than the absolute potential range in sunshine. We analyze the potential distribution on the HTV surface by a multi-utility spacecraft charging analysis tool, because ATOTIE-mini can only observe one point on the HTV surface. The analysis results are discussed with respect to the flight attitude