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Recent activities within IEC TC65/SC65B
Hiroshi Ishihara 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper introduces the overview of the IEC/SC65B: Devices and process analysis sub-committee activity. Keywords: IEC, SC65B, DEVICE, process analysis, TEMPERATURE SENSORS, TESTING AND EVALUATION PERFORMANCE, Programmable control systems, Final control valves, Function Block, 61131, 60534, 61499, Programming Languages, Functional safety
DEBRIS DISKS AND THE ZODIACAL LIGHT EXPLORED BY THE AKARI MID-INFRARED ALL-SKY SURVEY
DAISUKE ISHIHARA,NAMI TAKEUCHI,TORU KONDO,HIROSHI KOBAYASHI,HIDEHIRO KANEDA,SHU-ICHIRO INUTSUKA,SHINKI OYABU,TAKAHIRO NAGAYAMA,HIDEAKI FUJIWARA,TAKASHI ONAKA 한국천문학회 2017 天文學論叢 Vol.32 No.1
Debris disks are circumstellar dust disks around main-sequence stars. They are important observational clues to understanding the planetary system formation. The zodiacal light is the thermal emission from the dust disk in our Solar system. %For a comprehensive understanding of the nature andthe evolution of dust disks around main-sequence stars,we try a comparative study of debris disks and the zodiacal light. %We search for debris disks using the AKARI mid-infrared all-sky point source catalog. By applying accurate flux estimate of the photospheric emissionbased on the follow-up near-infrared observations with IRSF,we have improved the detection rate of debris disks. %For a detailed study of the structure and grain propertiesin the zodiacal dust cloud,as an example of dust disks around main-sequence stars,we analyze the AKARI mid-infrared all-sky diffuse maps. %As a result of the debris disks search,we found old ($>$1\,Gyr) debris disks which have large excess emissioncompared to their age, which cannot be explained simplyby the conventional steady-state evolution model. %From the zodiacal light analysis, we find the possibilitythat the dust grains trapped in the Earth's resonance orbitshave increased by a factor of $\sim$3 in the past $\sim$20 years. %Combining these results, we discuss the non-steady processes in debris disks and the zodiacal light.
MODELING OF THE ZODIACAL EMISSION FOR THE<i>AKARI</i>/IRC MID-INFRARED ALL-SKY DIFFUSE MAPS
Kondo, Toru,Ishihara, Daisuke,Kaneda, Hidehiro,Nakamichi, Keichiro,Takaba, Sachi,Kobayashi, Hiroshi,Ootsubo, Takafumi,Pyo, Jeonghyun,Onaka, Takashi American Astronomical Society 2016 The Astronomical journal Vol.151 No.3
<P>The zodiacal emission, which is the thermal infrared (IR) emission from the interplanetary dust (IPD) in our solar system, has been studied for a long time. Nevertheless, accurate modeling of the zodiacal emission has not been successful to reproduce the all-sky spatial distribution of the zodiacal emission, especially in the mid-IR where the zodiacal emission peaks. Therefore, we aim to improve the IPD cloud model based on Kelsall et al., using the AKARI 9 and 18 mu m all-sky diffuse maps. By adopting a new fitting method based on the total brightness, we have succeeded in reducing the residual levels after subtraction of the zodiacal emission from the AKARI data and thus in improving the modeling of the zodiacal emission. Comparing the AKARI and the COBE data, we confirm that the changes from the previous model to our new model are mostly due to model improvements, but not temporal variations between the AKARI and the COBE epoch, except for the position of the Earth-trailing blob. Our results suggest that the size of the smooth cloud, a dominant component in the model, is about 10% more compact than previously thought, and that the dust sizes are not large enough to emit blackbody radiation in the mid-IR. Furthermore, we detect a significant isotropically distributed IPD component, owing to an accurate baseline measurement with AKARI.</P>
SEARCH FOR DEBRIS DISKS BY AKARI AND IRSF
NAMI TAKEUCHI,DAISUKE ISHIHARA,HIDEHIRO KANEDA,SHINKI OYABU,HIROSHI KOBAYASHI,TAKAHIRO NAGAYAMA,TAKASHI ONAKA,HIDEAKI FUJIWARA 한국천문학회 2017 天文學論叢 Vol.32 No.1
Debris disks are important observational clues to understanding on-goingplanetary system formation. They are usually identified by significantmid-infrared excess on top of the photospheric emission of a central star onthe basis of prediction from \sl J\rm-, \sl H\rm-, and \sl Ks\rm-band fluxes and the stellar model spectra. For bright stars, 2MASS near-infrared fluxes suffer large uncertainties due to thenear-infrared camera saturation. Therefore we have performed follow-up observations with the IRSF 1.4 mnear-infrared telescope located in South Africa to obtain accurate \sl J\rm-, \sl H\rm-, and \sl Ks\rm-bandfluxes of the central stars. Among 754 main-sequence stars which are detected in theAKARI 18 $\mu$m band, we have performed photometry for 325 stars with IRSF. As a result, we have successfully improved the flux accuracy of the centralstars from 9.2 \% to 0.5 \% on average. Using this dataset, we have detected 18$\mu$m excess emission from 57 stars in our samples with a 3$\sigma$ level. We find that some of them have high ratios of the excess to the photospheric emission even around very old stars,which cannot be explained by the current planet-formation theories.
Kono Maori,Okuda Tomoaki,Ishihara Nami,Hagino Hiroyuki,Tani Yuto,Okochi Hiroshi,Tokoro Chiharu,Takaishi Masayuki,Ikeda Hidefumi,Ishihara Yasuhiro 한국독성학회 2023 Toxicological Research Vol.39 No.1
Fine particulate matter (PM2.5) exposure has a risk of inducing several health problems, especially in the respiratory tract. The skin is the largest organ of the human body and is therefore the primary target of PM2.5. In this study, we examined the effects of PM2.5 on the skin using a human 3-dimensional cultured epidermis model. PM2.5 was collected by cyclonic separation in Yokohama, Japan. Global analysis of 34 proteins released from the epidermis revealed that the chemokines, chemokine C-X-C motif ligand 1 (CXCL1) and interleukin 8 (IL-8), were significantly increased in response to PM2.5 exposure. These chemokines stimulated neutrophil chemotaxis in a C-X-C motif chemokine receptor 2-dependent manner. The oxidative stress and signal transducer and activator of transcription 3 pathways may be involved in the increased expression of CXCL1 and IL-8 in the human epidermis model. Interestingly, in the HaCaT human keratinocyte cell line, PM2.5 did not affect chemokine expression but did induce IL-6 expression, suggesting a different effect of PM2.5 between the epidermis model and HaCaT cells. Overall, PM2.5 could induce the epidermis to release chemokines, followed by neutrophil activation, which might cause an unregulated inflammatory reaction in the skin.
Toyomi Yoshiiwa,Masashi Miyazaki,Naoki Notani,Toshinobu Ishihara,Masanori Kawano,Hiroshi Tsumura 대한척추외과학회 2016 Asian Spine Journal Vol.10 No.6
Study Design: Cross-sectional study. Purpose: To investigate the relationship between ligamentum flavum (LF) thickening and lumbar segmental instability and disc degeneration and facet joint osteoarthritis. Overview of Literature: Posterior spinal structures, including LF thickness, play a major role in lumbar spinal canal stenosis pathogenesis. The cause of LF thickening is multifactorial and includes activity level, age, and mechanical stress. LF thickening pathogenesis is unknown. Methods: We examined 419 patients who underwent computed tomography (CT) myelography and magnetic resonance imaging after complaints of clinical symptoms. To investigate LF hypertrophy, 57 patients whose lumbar vertebra had normal disc heights at L4–5 were selected to exclude LF buckling as a hypertrophy component. LF thickness, disc space widening angulation in flexion, segmental angulation, presence of a vacuum phenomenon, and lumbar lordosis at T12–S1 were investigated. Disc and facet degeneration were also evaluated. Facet joint orientation was measured via an axial CT scan. Results: The mean LF thickness in all patients was 4.4±1.0 mm at L4–5. There was a significant correlation between LF thickness and disc degeneration; LF thickness significantly increased with severe disc degeneration and facet joint osteoarthritis. There was a tendency toward increased LF thickness in more sagittalized facet joints than in coronalized facet joints. Logistic regression analysis showed that LF thickening was influenced by segmental angulation and facet joint osteoarthritis. Patient age was associated with LF thickening. Conclusions: LF hypertrophy development was associated with segmental instability and severe disc degeneration, severe facet joint osteoarthritis, and a sagittalized facet joint orientation.
Risk factors for severity of colonic diverticular hemorrhage
Ken Kinjo,Toshiyuki Matsui,Takashi Hisabe,Hiroshi Ishihara,Toshiki Kojima,Kenta Chuman,Shigeyoshi Yasukawa,Tsuyoshi Beppu,Akihiro Koga,Satoshi Ishikawa,Masahiro Kishi,Noritaka Takatsu,Fumihito Hirai,K 대한장연구학회 2018 Intestinal Research Vol.16 No.3
Background/Aims: Colonic diverticular hemorrhage (DH) was a rare disease until the 1990s, and its incidence has increased rapidly since 2000 in Japan. In recent years, colonic DH has been the most frequent cause of lower gastrointestinal bleeding (LGIB). Nearly all cases of DH are mild, with the bleeding often stopping spontaneously. Some cases, however, require surgery or arterial embolization. In this study, using a cohort at Fukuoka University Chikushi Hospital, we investigated factors associated with severe colonic DH. Methods: Among patients with LGIB who underwent colonoscopy at our hospital between 1995 and 2013, DH was identified in 273 patients. Among them, 62 patients (22.7%) were defined as having severe colonic DH according to recurrence of bleeding in a short period, and/or the necessity of transfusion, arterial embolization, or surgery. We then evaluated risk factors for severe DH among DH patients in this retrospective cohort. Results: Among the 273 patients with DH, use of non-steroidal anti-inflammatory drugs (NSAIDs) (odds ratio [OR], 2.801; 95% confidence interval [CI], 1.164–6.742), Charlson Risk Index (CRI) ≥2 (OR, 3.336; 95% CI, 1.154–7.353), right-sided colonic DH (OR, 3.873; 95% CI, 1.554–9.653), and symptoms of cerebral hypoperfusion (such as light-headedness, dizziness, or syncope) (OR, 2.926; 95% CI, 1.310–6.535) showed an increased risk of severe DH even after controlling for other factors. Conclusions: Severe DH occurred in 23% of DH patients, and NSAID use, CRI ≥2, right-sided colonic DH, and symptoms of cerebral hypoperfusion are suggested to be predictors of severe DH.