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Deposition Process of Sulfate and Elemental Carbon in Japanese and Thai Forests
Hiroyuki Sase,Kazuhide Matsuda,Thiti Visaratana,Hathairatana Garivait,Naoyuki Yamashita,Bopit Kietvuttinon,Bundit Hongthong,Jesada Luangjame,Pojanie Khummongkol,Junko Shindo,Tomomi Endo,Keiichi Sato,S 한국대기환경학회 2012 Asian Journal of Atmospheric Environment (AJAE) Vol.6 No.4
Particulate matter deposited on leaf surfaces may cause erosion/abrasion of epicuticular wax and the malfunction of stomata. However, the deposition processes of particulate matter, such as elemental carbon (EC), has not been studied sufficiently in Asian forest ecosystems. Deposition processes for particulate SO42- and EC were studied in a Japanese cedar forest in Kajikawa, Niigata Prefecture, Japan, and in a dry evergreen forest and a dry deciduous forest in Sakaerat, Nakhon Ratchasima province, Thailand. The SO42- fluxes attributed to rainfall outside the forest canopy (RF), throughfall (TF), and stemflow (SF)showed distinct seasonalities at both sites, increasing from November to February at the Kajikawa site and in March/April at the Sakaerat site. Seasonal west/northwest winds in winter may transport sulfur compounds across the Sea of Japan to the Kajikawa site. At the Sakaerat site, pollutants suspended in the air or dry deposits from the dry season might have been washed away by the first precipitations of the wet season. The EC fluxes from RF and TF showed similar variations by season at the Kajikawa site, while the flux from TF was frequently lower than that from RF at the Sakaerat site. Particulate matter strongly adsorbed onto leaf surfaces is not washed away by rainfall and contributes to the EC flux. At the Kajikawa site, Japanese cedar leaf surfaces accumulated the highest levels of particulate matter and could not be neglected when calculating the total flux. When such leaf-surface particles were considered, the contribution of dry deposition to the total EC flux was estimated to be 67%, 77%, and 82% at the Kajikawa site,and at the evergreen and deciduous forests of the Sakaerat site, respectively. Leaf-surface particles must be included when evaluating the dry and total fluxes of particulate matter, in particular for waterinsoluble constituents such as EC.
Hiroyuki Takashima,Tsuneo Takebayashi,Hiroki Shishido,Mitsunori Yoshimoto,Rui Imamura,Yoshihiro Akatsuka,Yoshinori Terashima,Hiroyoshi Fujiwara,Masateru Nagae,Toshikazu Kubo,Toshihiko Yamashita 대한척추외과학회 2016 Asian Spine Journal Vol.10 No.1
Study Design: Prospective study based on magnetic resonance (MR) imaging of the lumbar spinal root of the intervertebral foramen. Purpose: This study was to compare MR three-dimensional (3D) sequences for the evaluation of the lumbar spinal root of the intervertebral foramen. Overview of Literature: The diagnosis of spinal disorders by MR imaging is commonly performed using two-dimensional T1- and T2-weighted images, whereas 3D MR images can be used for acquiring further detailed data using thin slices with multi-planar reconstruction. Methods: On twenty healthy volunteers, we investigated the contrast-to-noise ratio (CNR) of the lumbar spinal root of the intervertebral foramen with a 3D balanced sequence. The sequences used were the fast imaging employing steady state acquisition and the coherent oscillatory state acquisition for the manipulation of image contrast (COSMIC). COSMIC can be used with or without fat suppression (FS). We compared these sequence to determine the optimized visualization sequence for the lumbar spinal root of the intervertebral foramen. Results: For the CNR between the nerve root and the peripheral tissue, these were no significant differences between the sequences at the entry of foramen. There was a significant difference and the highest CNR was seen with COSMIC-FS for the intra- and extraforamen. Conclusions: In this study, the findings suggest that the COSMIC-FS sequences should be used for the internal or external foramen for spinal root disorders.
Characteristics of Sediment Disasters that Occurred in Japan in Recent Years
( Kumiko Yamashita ),( Daisuke Yamada ),( Satoshi Watanabe ),( Hiroyuki Sawai ),( Tomoaki Nishikawa ),( Mina Kobayashi ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
In recent years, sediment disasters have been frequent in Japan triggered by heavy rainfall at typhoons and line-shaped rain band. When conducting a disaster survey, it is necessary to determine at first where the disaster is occurring and where the damage is large. In the case of sediment disasters that distribute wide area, it is effective to use aerial photograph to understand the disaster situation. We researched the characteristics of three cases of sediment disasters that occurred in Japan in recent years based on the result of the interpretation of aerial photographs taken just after disasters, and the detailed examination of field survey. The target sediment disasters are Typhoon No10 on August 2016, heavy rainfall in northern Kyusyu in July 2017, and West Japan heavy rainfall 2018. We report the characteristics of each sediment disaster from these results. These sediment disasters occurred in various types because the conditions under which these sediment disasters occurred were different, such as region, topography, geology, and rainfall. Understanding the differences of sediment disasters by region is considered to be important in order to reduce the damage caused by sediment disasters, such as the construction of erosion control facilities and the maintenance of a warning and evacuation system.
Deposition Process of Sulfate and Elemental Carbon in Japanese and Thai Forests
Sase, Hiroyuki,Matsuda, Kazuhide,Visaratana, Thiti,Garivait, Hathairatana,Yamashita, Naoyuki,Kietvuttinon, Bopit,Hongthong, Bundit,Luangjame, Jesada,Khummongkol, Pojanie,Shindo, Junko,Endo, Tomomi,Sat Korean Society for Atmospheric Environment 2012 Asian Journal of Atmospheric Environment (AJAE) Vol.6 No.4
Particulate matter deposited on leaf surfaces may cause erosion/abrasion of epicuticular wax and the malfunction of stomata. However, the deposition processes of particulate matter, such as elemental carbon (EC), has not been studied sufficiently in Asian forest ecosystems. Deposition processes for particulate ${SO_4}^{2-}$ and EC were studied in a Japanese cedar forest in Kajikawa, Niigata Prefecture, Japan, and in a dry evergreen forest and a dry deciduous forest in Sakaerat, Nakhon Ratchasima province, Thailand. The ${SO_4}^{2-}$ fluxes attributed to rainfall outside the forest canopy (RF), throughfall (TF), and stemflow (SF) showed distinct seasonalities at both sites, increasing from November to February at the Kajikawa site and in March/April at the Sakaerat site. Seasonal west/northwest winds in winter may transport sulfur compounds across the Sea of Japan to the Kajikawa site. At the Sakaerat site, pollutants suspended in the air or dry deposits from the dry season might have been washed away by the first precipitations of the wet season. The EC fluxes from RF and TF showed similar variations by season at the Kajikawa site, while the flux from TF was frequently lower than that from RF at the Sakaerat site. Particulate matter strongly adsorbed onto leaf surfaces is not washed away by rainfall and contributes to the EC flux. At the Kajikawa site, Japanese cedar leaf surfaces accumulated the highest levels of particulate matter and could not be neglected when calculating the total flux. When such leaf-surface particles were considered, the contribution of dry deposition to the total EC flux was estimated to be 67%, 77%, and 82% at the Kajikawa site, and at the evergreen and deciduous forests of the Sakaerat site, respectively. Leaf-surface particles must be included when evaluating the dry and total fluxes of particulate matter, in particular for water-insoluble constituents such as EC.
Tagawa, Hiroyuki,Miyamura, Tomoshi,Yamashita, Takuzo,Kohiyama, Masayuki,Ohsaki, Makoto Council on Tall Building and Urban Habitat Korea 2015 International journal of high-rise buildings Vol.4 No.1
Detailed finite element (FE) analyses of a full-scale four-story steel frame structure, subjected to consecutive 60% and 100% excitations from the JR Takatori records during the 1995 Hyogoken-Nanbu earthquake, are conducted using E-Simulator. The four-story frame was tested at the largest shake-table facility in the world, E-Defense, in 2007. E-Simulator is a parallel FE analysis software package developed to accurately simulate structural behavior up to collapse by using a fine mesh of solid elements. To reduce computational time in consecutive dynamic time history analyses, static analysis with gravity force is introduced to terminate the vibration of the structure during the analysis of 60% excitation. An overall sway mechanism when subjected to 60% excitation and a story mechanism resulting from local buckling of the first-story columns when subjected to 100% excitation are simulated by using E-Simulator. The story drift response to the consecutive 60% and 100% excitations is slightly smaller than that for the single 100% excitation.
( Toshihiko Hata ),( Hiroyuki Sato ),( Ako Machino ),( Mai Wakabayashi ),( Morito Kise ),( Hiroki Ohashi ),( Daisuke Yamashita ),( Kaoru Sakural ),( Toru Matsubayashi ),( Masahiko Hatao ),( Ken Ueda ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
31yrs. old female known to have hypertension and dyslipidemia for 1 yr.presented with h/o weight loss around 10 kg for 1 yr,palpiations,diaphoresis and hypertensive urgencyBp 210/110 mmhg)and also found to have diabetes (newly diagnosed)further investigations shows large adrenal mass (left side)suspicion of phaechromocytoma and urine catecholamoines was high, urology was consulted and she underwent left adrenalectomy and biopsy confi rm the diagnosis of malignant phaechromcytoma. Repeat Urine catecholamines which was quite high on presentation later normalized after surgey. Now she is under active follow up with endocrinologist and on antihypertensive medications very minimal doses and for her diabetes she is not on any medications as well after surgery.
Thyroid Cytology: The Japanese System and Experience at Yamashita Thyroid Hospital
Shinya Satoh,Hiroyuki Yamashita,Kennichi Kakudo 대한병리학회 2017 Journal of Pathology and Translational Medicine Vol.51 No.6
In Japan, fine-needle aspiration (FNA) cytology is the most important diagnostic modality for triaging patients with thyroid nodules. A clinician (endocrinologist, endocrine surgeon, or head and neck surgeon) generally performs FNA cytology at the outpatient clinic, and ultrasound (US)-guided FNA is widespread because US is extremely common and most clinicians are familiar with it. Although almost all FNA thyroid samples are examined by certified cytopathologists and pathologists, some clinicians assess cytological specimens themselves. In Japan, there are two clinical guidelines regarding the management of thyroid nodules. One is the General Rules for the Description of Thyroid Cancer (GRDTC) published by the Japanese Society of Thyroid Surgery (JSTS) in 2005, and the other is the national reporting system for thyroid FNA cytology published by the Japan Thyroid Association in 2013 (Japanese system). Although the Bethesda System for Reporting Thyroid Cytopathology (Bethesda system) is rarely used in Japan, both the GRDTC and Japanese system tried to incorporate the Bethesda system so that the cytological diagnoses would be compatible with each other. The essential point of the Japanese system is stratification of follicular neoplasm (FN) into three subgroups based on cytological features in order to reduce unnecessary diagnostic thyroidectomy, and this system has been successful in stratifying the risk of malignancy in FN patients at several high-volume thyroid surgery centers. In Japan, the measurement of thyroglobulin and/or calcitonin in FNA needle washings is often used as an adjunct for diagnosis of possible cervical lymph node metastasis when FNA cytology is performed.
Radioprotection effect and Immune Enhancement for Enterococcus Faecalis (EF 2001)
Yeunhwa Gu,Hiroyuki Iwasa,Takashi Nakamura,Masahoro Iwasa,Takeo Hasegawa,Takenori Yamashita,Masami Oshima,Kaoru Terai,Mituchana yuicti,Kenichi Bamen,Tetsuo Takeuchi,Kyoo Seok Ahn 한의병리학회 2004 대한동의병리학회 학술대회논문집 Vol.2004 No.8