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成像板对X射线的能量响应

原子能科学技术 2009年第7期43卷 644-647页

作者：骆志平 c. suzuki T. Kosako 马吉增中国原子能科学研究院辐射安全研究部北京102413 中国辐射防护研究院山西太原030006 清华大学工程物理系北京100084 东京大学日本东京1130032

作为X射线探测器,成像板的光激发光子信号对X射线的能量响应是非常重要的数据。利用同步辐射光源的单能X射线照射成像板,得到成像板对低能光子的能量响应曲线,并与McNP程序计算结果进行对比分析,得到成像板响应函数的衰减模型。计算结... 详细信息

作为X射线探测器,成像板的光激发光子信号对X射线的能量响应是非常重要的数据。利用同步辐射光源的单能X射线照射成像板,得到成像板对低能光子的能量响应曲线,并与McNP程序计算结果进行对比分析,得到成像板响应函数的衰减模型。计算结果与实验结果一致,为进一步开展成像板在辐射测量领域的研究工作提供了参考。

关键词：成像板能量响应 X射线衰减模型

Accelerator Neutron Dosimetry Using composite Proportional counting Tube

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Accelerator Neutron Dosimetry Using Composite Proportional C...

作者： M.Hashimoto T.Usui c.suzuki T.Shimada A.cooper-Roy T.Abe Y.Koike T.Kosako H&S Division O-arai Engineering CenterJAEA School of Engineering The University of Tokyo Radioisotope center The University of Tokyo

INTRODUcTION:The composite proportional counting tube which is filled with He-cH mixed-gas is *** has compound characteristics for neutron *** detects thermalized neutron while cH is provided for relatively fast neutron *** output of each reaction can be distinguished with PHA analyzing because the scattered charged particle with fast neutron composes a continuous spectrum while the thermal neutron absorption composes a peaked *** ratio of each reaction reflects the neutron energy distribu-

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用半导体颜色传感器检测空气中缺氧情况

仪器仪表与分析监测 1986年第2期 51-53页

作者： N.KAKO N.TA NAKA c.suzuki 夏建弘

一、前言在频谱和颜色测量中,往往需要大型和复杂的仪器。然而人们对传感器的要求是必须体积小,可靠性高而且价格便宜。一种半导体颜色传感器已由sharp提出。这种传感器体积小,原理简单,而且很容易分辨颜色。在日本,冬天屋内通常用煤气... 详细信息

一、前言在频谱和颜色测量中,往往需要大型和复杂的仪器。然而人们对传感器的要求是必须体积小,可靠性高而且价格便宜。一种半导体颜色传感器已由sharp提出。这种传感器体积小,原理简单,而且很容易分辨颜色。在日本,冬天屋内通常用煤气加热器,煤炉加热器和石油炉。当煤气炉或石油炉在通风不良的房间中使用较长时间时,房间

关键词：颜色传感器视觉传感器缺氧情况空气工业气体

Preoperative assessment of liver function and perioperative management of posthepatectomy liver failure

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Hepatobiliary Surgery and Nutrition 2024年第3期13卷 527-529页

作者： Masahiro Shiihara Mitsugi Shimoda Shuji suzuki Department of Gastroenterological Surgery Ibaraki Medical CenterTokyo Medical UniversityIbarakiJapan

PHLF is the status of disfunction in synthesis,excretion and *** to International Study Group of Liver Surgery(ISGLS),PHLF is defined by an increased bilirubin level and international normalized ratio(INR)on or after postoperative 5 days,and is graded by clinical severity from grades A to c(1,2).Grade A is the condition without any *** B deviates from normal postoperative management and requires blood products,diuretics,oxygen administration,and so *** c is the status with multiple organ failure which requires intensive management including respirator,dialysis,and liver transplantation,*** mortality rates in A,B and c were estimated 0%,12%,and 54%,respectively(1).Although PHLF has decreased due to extensive studies of risk factors for PHLF and improvements in surgical techniques,it remains high for several types of *** to a nationwide survey of board-certified training institutions by the Japanese Society of Hepato-Biliary-Pancreatic Surgery,90-day mortality rates is 10.3%and 6.7%after left trisectionectomy and hepatopancreatectomy,respectively(3).Further,the mortality rates after associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)was reported over 5%(4).

关键词： Hepatectomy posthepatectomy liver failure posthepatectomy liver failure(PHLF)

High-temperature corrosion of sintered RE_(2)Si_(2)O_(7)(RE=Yb and Ho)environmental barrier coating materials by volcanic ash

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1628-1638页

作者： Ayahisa Okawa Son Thanh Nguyen Tadachika Nakayama Thi-Mai-Dung Do Hisayuki Suematsu Shu Yin Takuya Hasegawa Tsuneo suzuki Takashi Goto Koichi Niihara Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980-8577Japan Department of creative Engineering National Institute of TechnologyKushiro 084-0916Japan Extreme Energy-Density Research Institute Nagaoka University of TechnologyNagaoka 940-2188Japan Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai 980-8577Japan

Rare-earth silicates are promising environmental barrier coatings(EBcs)that can protect Sic_(f)/Si c_(m)substrates in next-genera tion gas turbine ***,RE_(2)Si_(2)O_(7)(RE=Yb and Ho)shows potential as an EBc due to its coefficient of thermal expansion(cTE)compatible with substrates and high resistance to water vapor *** target operating temperature for next-generation tur bine blades is 1400°*** is inevitable during adhesion to molten volcanic ash,and thus,understanding the corrosion behavior o the material is crucial to its *** study investigates the high-temperature corrosion behavior of sintered RE_(2)Si_(2)O_(7)(RE=Yb and Ho).Samples were prepared using a solid-state reaction and hot-press *** were then exposed to volcanic ash at 1400°c for 224,and 48 *** 48 h of exposure,volcanic ash did not react with Yb_(2)Si_(2)O_(7)but penetrated its interior,causing *** Ho_(2)Si_(2)O_(7)was partially dissolved in the molten volcanic ash,forming a reaction zone that prevented volcanic ash melts from penetrating the *** increasing heat treatment time,the reaction zone expanded,and the thickness of the acicular apatite grains increased The ca:Si ratios in the residual volcanic ash were mostly unchanged for Yb_(2)Si_(2)O_(7)but decreased considerably over time for Ho_(2)Si_(2)O_(7).Th ca in volcanic ash was consumed and formed apatite,indicating that RE^(3+)ions with large ionic radii(Ho>Yb)easily precipitated apatit from the volcanic ash.

关键词： environmental barrier coating volcanic ash rare-earth disilicate corrosion

Expression levels of K_(ATP)channel subunits and morphological changes in the mouse liver after exposure to radiation

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World Journal of Experimental Medicine 2024年第2期14卷 103-113页

作者： Ming Zhou Tao-Sheng Li Hiroshi Abe Hideo Akashi Ryoji suzuki Yoshio Bando Department of Anatomy Akita University Graduate School of MedicineAkita 010-8543Japan Department of Stem cell Biology Atomic Bomb Disease InstituteNagasaki UniversityNagasaki 852-8523Japan Sendai Old Age Refresh Station A Long-term Care Health FacilitySendai 981-1105Japan

BAcKGROUND ATP sensitive K+(K_(ATP))channels are ubiquitously distributed in various of cells and tissues,including the *** play a role in the pathogenesis of myocardial and liver *** To evaluate the radiation-induced changes in the expression of K_(ATP)channel subunits in the mouse liver to understand the potential role of K_(ATP)channels in radiation *** Adult c57BL/6 mice were randomly exposed toγ-rays at 0 Gy(control,n=2),0.2 Gy(n=6),1 Gy(n=6),or 5 Gy(n=6).The livers were removed 3 and 24 h after radiation *** and eosin staining was used for morphological observation;immunohistochemical staining was applied to determine the expression of K_(ATP)channel subunits in the liver *** compared with the control group,the livers exposed to 0.2 Gyγ-ray showed an initial increase in the expression of Kir6.1 at 3 h,followed by recovery at 24 h after *** to a high dose of 5.0 Gy resulted in decreased expression of Kir6.1 and increased expression of SUR2B at 24 ***,the expression of Kir6.2,SUR1,or SUR2A had no remarkable changes at 3 and 24 h after exposure to any of these *** The expression levels of Kir6.1 and SUR2B in mouse liver changed differently in response to different radiation doses,suggesting a potential role for them in radiation-induced liver injury.

关键词： Radiation exposure ATP-sensitive K^(+)channel Mouse Liver

current perspectives of viral hepatitis

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World Journal of Gastroenterology 2024年第18期30卷 2402-2417页

作者： Daisuke Usuda Yuki Kaneoka Rikuo Ono Masashi Kato Yuto Sugawara Runa Shimizu Tomotari Inami Eri Nakajima Shiho Tsuge Riki Sakurai Kenji Kawai Shun Matsubara Risa Tanaka Makoto suzuki Shintaro Shimozawa Yuta Hotchi Ippei Osugi Risa Katou Sakurako Ito Kentaro Mishima Akihiko Kondo Keiko Mizuno Hiroki Takami Takayuki Komatsu Tomohisa Nomura Manabu Sugita Department of Emergency and critical care Medicine Juntendo University Nerima HospitalNerima 177-8521TokyoJapan Department of Sports Medicine Faculty of MedicineJuntendo UniversityBunkyo 113-8421TokyoJapan

Viral hepatitis represents a major danger to public health,and is a globally leading cause of *** five liver-specific viruses:Hepatitis A virus,hepatitis B virus,hepatitis c virus,hepatitis D virus,and hepatitis E virus,each have their own unique epidemiology,structural biology,transmission,endemic patterns,risk of liver complications,and response to antiviral *** remain few options for treatment,in spite of the increasing prevalence of viral-hepatitiscaused liver ***,chronic viral hepatitis is a leading worldwide cause of both liver-related morbidity and mortality,even though effective treatments are available that could reduce or prevent most patients’*** 2016,the World Health Organization released its plan to eliminate viral hepatitis as a public health threat by the year 2030,along with a discussion of current gaps and prospects for both regional and global eradication of viral ***,treatment is sufficiently able to prevent the disease from reaching advanced ***,future therapies must be extremely safe,and should ideally limit the period of treatment necessary.A better understanding of pathogenesis will prove beneficial in the development of potential treatment strategies targeting infections by viral *** review aims to summarize the current state of knowledge on each type of viral hepatitis,together with major innovations.

关键词： Hepatitis A virus Hepatitis B virus Hepatitis c virus Hepatitis D virus Hepatitis E virus current perspectives

Uncertainty in solid precipitation and snow depth prediction for Siberia using the Noah and Noah-MP land surface models

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Frontiers of Earth Science 2018年第4期12卷 672-682页

作者： Kazuyoshi suzuki Milija ZUPANSKI Institute of Arctic climate and Environment change Research (IAcE) Japan Agency for Marine-Earth Science and Technology (JAMSTEC)Yokohama236-0001Japan cooperative Institute for Research in the Atmosphere Colorado State UniversityFort CollinsCO 80523-1375USA

In this study, we investigate the uncertainties associated with land surface processes in an ensemble predication context. Specifically, we compare the uncertainties produced by a coupled atmosphere–land modeling system with two different land surface models, the Noah- MP land surface model (LSM) and the Noah LSM, by using the Maximum Likelihood Ensemble Filter (MLEF) data assimilation system as a platform for ensemble prediction. We carried out 24-hour prediction simulations in Siberia with 32 ensemble members beginning at 00:00 UTc on 5 March 2013. We then compared the model prediction uncertainty of snow depth and solid precipitation with observation-based research products and evaluated the standard deviation of the ensemble spread. The prediction skill and ensemble spread exhibited high positive correlation for both LSMs, indicating a realistic uncertainty estimation. The inclusion of a multiple snowlayer model in the Noah-MP LSM was beneficial for reducing the uncertainties of snow depth and snow depth change compared to the Noah LSM, but the uncertainty in daily solid precipitation showed minimal difference between the two LSMs. The impact of LSM choice in reducing temperature uncertainty was limited to surface layers of the atmosphere. In summary, we found that the more sophisticated Noah-MP LSM reduces uncertainties associated with land surface processes compared to the Noah LSM. Thus, using prediction models with improved skill implies improved predictability and greater certainty of prediction.

关键词： ensemble simulation land-atmosphere interaction ensemble spread vertical temperature snow prediction

Numerical Simulation of Sand Erosion Phenomena in Rotor/Stator Interaction of compressor

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Journal of Thermal Science 2008年第2期17卷 125-133页

作者： Masaya suzuki Kazuaki Inaba Makoto Yamamoto Department of Mechanical Engineering Tokyo University of Science

Sand erosion is a phenomenon where solid particles impinging to a wall cause serious mechanical damages to the wall surface. This phenomenon is a typical gas-particle two-phase turbulent flow and a multi-physics problem where the flow field, particle trajectory and wall deformation interact with each other. On the other hand, aircraft engines operating in a particulate environment are subjected to the performance and lifetime deterioration due to sand erosion. Especially, the compressor of the aircraft engines is severely damaged. The flow fields of the compressor have strongly three dimensional and unsteady natures. In order to estimate the deterioration due to sand erosion, the sand erosion simulation for a compressor is required under the consideration of the rotor-stator interaction. In the present study, we apply our three dimensional sand erosion prediction code to a single stage axial flow compressor. We numerically investigate the change of the flow field, the particle trajectories, and the eroded wall shape in the compressor, to clarify the effects of sand erosion in the compressor.

关键词： sand erosion axial compressor rotor/stator interaction computational fluid dynamics