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Dust incorporation from areas under the pathway of Asian dust transport traced from stable isotopes of carbonate particles

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Dust incorporation from areas under the pathway of Asian dus...

第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： Hiroyuki kitagawa Department of Earth and Environmental Sciences Graduate School of Environmental StudiesNagoya University

Dust emission from the arid and semiarid areas in northwestern China such as the Gobi Deserts and Taklimakan Desert（hereafter,mentioned as Asian dust） is transported by the westerlies and the winter monsoon winds to Korea,Japan and the Pacific,even across the Pacific to the United States and Canada（Liu and Diamond,2005）.The Asian dust alters the chemical functions of the atmosphere（Sokolik and Toon,1996;Husar et al.,2001）,cloud physical process（Isono et al.,1959;Yin et al.,2002） and the biogeochemical process in Northwestern Pacific（Zhuang et al.,1992;Mahowald et al.,2005）.The Asian dust events,accompanying with increasing concentration and decreasing visibility in the atmosphere intensively,cause seriously social and economic problems at the downwind mega-cities.

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Chemistry and Application of Porous Coordination Polymers

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Chemistry and Application of Porous Coordination Polymers

第十五届全国分子筛学术大会

作者： Susumu kitagawa Institute for Integrated Cell-Material Sciences and Department of Synthetic Chemistry and Biological ChemistryKyoto University ERATO kitagawa Integrated Pores Project Japan Science and Technology Agency （JST）

＜正＞The recent advent of porous coordination polymers （PCPs） or Metal Organic Frameworks （MOFs） as new functional microporous materials, have attracted the

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A Model of Security Adaptation for Limited Resources in Wireless Sensor Network

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Journal of Computer and Communications 2017年第3期5卷 10-23页

作者： Jumadi Mabe Parenreng Akio kitagawa Electrical Engineering and Computer Science Kanazawa University Ishikawa Japan Information Engineering and Computer Education State University of Makassar South Sulawesi Indonesia

View of wireless sensor network (WSN) devices is small but have exceptional functionality. Each node of a WSN must have the ability to compute and process data and to transmit and receive data. However, WSN nodes have limited resources in terms of battery capacity, CPU, memory, bandwidth, and data security. Memory limitations mean that WSN devices cannot store a lot of information, while CPU limitations make them operate slowly and limited battery capacity makes them operate for shorter periods of time. Moreover, the data gathered and processed by the network face real security threats. This article presents an Adaptable Resource and Security Framework (ARSy) that is able to adapt to the workload, security requirements, and available resources in a wireless sensor network. The workload adaptation is intended to preserve the resource availability of the WSN, while the security adaptation balances the level of security with the resource utilization. This solution makes resources available on the basis of the workload of the system and adjusts the level of security for resource savings and makes the WSN devices work more efficiently.

关键词： Wireless Sensor Network Resource-Aware Security-Aware Workload System Limited Resources

DIMENSIONAL CROSSOVER IN COORDINATION CHEMISTRY

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DIMENSIONAL CROSSOVER IN COORDINATION CHEMISTRY

2018年中西部地区无机化学化工学术研讨会

作者： Hiroshi kitagawa Division of Chemistry Graduate School of Science & iCeMS Kyoto University Kitashirakawa-Oiwakecho

Here, we demonstrate a bottom-up approach for the fabrication of well-defined dimensional-crossover nano-architectures with high tunability using metal ions and organic molecules as building blocks [1-11]. We succeeded in rationally constructing an assembly of square prism-shaped metal-organic nanotubes with aside of 2 nm. A uniform 1 D channel is fabricated inside the tube, and H O and alcohol can be selectively adsorbed. Its optical gap is about 0.76 eV of semiconductive region, and X-ray and theoretical studies revealed its unique electronic structure of CDW quartets. In addition, its electronic states can be successively controlled by exchanges of structural components and guest molecules. The results presented here demonstrate a rational route to the creation of nanotubes with high tunabilities of structures and electronic states, and might also offer valuable insights into multifunctional nanomaterials.

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Decreasing trend in prostate cancer with high serum prostate-specific antigen levels detected at first prostate-specific antigen-based population screening in Japan

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Asian Journal of Andrology 2014年第6期16卷 833-837页

作者： Yasuhide kitagawa Kazuaki Machioka Hiroshi Yaegashi Kazufumi Nakashima Mitsuo Ofud Kouji Izumi Satoru Ueno Yoshifumi Kadono Hiroyuki Konaka Atsushi Mizokami Mikio Namiki Department of Integrative Cancer Therapy and Urology Kanazawa University Graduate School of Medical Science Kanazawa 920-8640 Japan

To clarify the recent trends in prostate-specific antigen （PSA） distribution in men in Japan, we analyzed the PSA distributions of men undergoing PSA-based population screening. We summarized the annual individual data of PSA-based population screening in Kanazawa, Japan, from 2000 to 2011, and analyzed baseline serum PSA values of the participants at the first population screening. Serum PSA distributions were estimated in all participants and those excluding prostate cancer patients according to age. From 2000 to 2011, 19 620 men participated aged 54-69 years old in this screening program. Mean baseline serum PSA level of all participants at the first screening was 2.64 ng m1-1 in 2000, and gradually decreased to approximately 1.30 ng ml-I in 2006. That of participants excluding prostate cancer patients was 1.46 ng m1-1 in 2000, and there was no remarkable change during the study period. The 95t＂ percentiles in the participants excluding prostate cancer patients detected at the first population screening of men aged 54-59, 60-64, and 65-69 years old were 2.90, 3.60, and 4.50 ng m1-1, respectively. After the commencement of population screening, the proportion of prostate cancer patients with high serum PSA levels decreased. However, there were no changes in serum PSA levels in men without prostate cancer. Age-specific PSA reference level of men without prostate cancer in Japan was similar to that in China and Korea.

关键词： age-specific prostate-specific antigen reference range prostate cancer prostate-specific antigen-based population screening serum prostate-specific antigen distribution

Post-colonoscopy colorectal cancer rate in the era of highdefinition colonoscopy

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World Journal of Gastroenterology 2017年第42期23卷 7609-7617页

作者： Mineo Iwatate Tomoyuki kitagawa Yasumi Katayama Naohiko Tokutomi Shinichi Ban Santa Hattori Noriaki Hasuike Wataru Sano Yasushi Sano Masaya Tamano Gastrointestinal Center and Institute of Minimally-Invasive Endoscopic Care Sano Hospital Department of Gastroenterology Dokkyo Medical University Koshigaya Hospital Department of Pathology Dokkyo Medical University Koshigaya Hospital

AIM To investigate the post-colonoscopy colorectal cancer(PCCRC) rate for high-definition(HD) colonoscopy compared with that for standard-definition colonoscopy reported *** Using medical records at Sano Hospital(SH) and Dokkyo Medical University Koshigaya Hospital(DMUKH), we retrospectively obtained data on consecutive patients diagnosed as having CRC between January 2010 andDecember 2015. The definition of PCCRC was diagnosis of CRC between 7 and 36 mo after initial high-definition colonoscopy that had detected no cancer, and patients were divided into a PCCRC group and a non-PCCRC group. The primary outcome was the rate of PCCRC for HD colonoscopy. The secondary outcomes were factors associated with PCCRC and possible reason for occurrence of early and advanced *** Among 892 CRC patients, 11 were diagnosed as having PCCRC and 881 had non-PCCRC. The PCCRC rate was 1.7%(8/471) at SH and 0.7%(3/421) at DMUKH. In comparison with the non-PCCRC group, the PCCRC group had a significantly higher preponderance of smaller tumors(39 mm vs 19 mm, P = 0.002), a shallower invasion depth(T1 rate, 25.4% vs 63.6%, P = 0.01), a non-polypoid macroscopic appearance(39.0% vs 85.7%, P = 0.02) and an earlier stage(59.7% vs 90.9%, P = 0.03). Possible reasons for PCCRC were "missed or new" in 9 patients(82%), "incomplete resection" in 1(9%), and "inadequate examination'" in 1(9%). Among 9 "missed or new" PCCRC, the leading cause was non-polypoid shape for early PCCRC and blinded location for advanced *** The PCCRC rate for HD colonoscopy was 0.7%-1.7%, being lower than that for standard-definition colonoscopy(1.8%-9.0%) reported previously employing the same methodology.

关键词： Post-colonoscopy colorectal cancer Highdefinition Post-colonoscopy colorectal cancer rate Associated factor Possible explanation

Effect of stress ratio on fatigue lifetime and crack growth behavior of WC-Co cemented carbide

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Transactions of Nonferrous Metals Society of China 2014年第S1期24卷 14-19页

作者： Hiroko MIKADO Sotomi ISHIHARA Noriyasu OGUMA Kenichi MASUDA Syo kitagawa Shingo KAWAMURA Department of Mechanical Engineering University of Toyama Machinery and Engineering Group YKK Corporation National Institute of Technology Toyama College

Two types of fatigue tests, a rotating bending fatigue test and a three- or four-point bending fatigue test, were carried out on a fine grained WC-Co cemented carbide to evaluate its fatigue crack growth behavior and fatigue lifetime. From successive observations of the specimen surface during the fatigue process, it was revealed that most of the fatigue lifetime of the tested WC-Co cemented carbide was occupied with crack growth cycles. Using the basic equation of fracture mechanics, the relationship between the fatigue crack growth rate(da/dN) and the maximum stress intensity factor(Kmax) was derived. From this relation, both the values of the threshold intensity factor(Kth) and the fatigue fracture toughness(Kfc) of the material were determined. The fatigue lifetime of the WC-Co cemented carbide was estimated by analysis based on the modified linear elastic fracture mechanics approach. Good agreement between the estimated and experimental fatigue lifetimes was confirmed.

关键词： WC-Co cemented carbides fatigue lifetime crack growth rate stress intensity factor

MOF衍生的磷化钴纳米纤维用于电催化氧析出和氢析出反应

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中国科学:材料科学(英文版) 2023年第8期66卷 3139-3145页

作者：邹联力魏永生王秋菊刘铮徐强 Susumu kitagawa AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory(ChEM-OIL) National Institute of Advanced Industrial Science and Technology(AIST)Kyoto 606-8501Japan Innovative Functional Materials Research Institute National Institute of Advanced Industrial Science and Technology(AIST)Aichi 463-8560Japan Institute for Integrated Cell-Material Sciences(WPI-iCeMS) Kyoto UniversityKyoto 606-8501Japan Institute for Advanced Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013China Shenzhen Key Laboratory of Micro/Nano-Porous Functional Materials(SKLPM) SUSTech-Kyoto University Advanced Energy Materials Joint Innovation Laboratory(SKAEM-JIL)Department of Chemistry and Department of Materials Science and EngineeringSouthern University of Science and Technology(SUSTech)Shenzhen 518055China

高性能催化剂的开发和利用是能源领域的研究热点,其中制备具有高活性面积的一维纳米催化剂是目前的难点.本研究以金属有机框架(MOF)复合纤维为前驱体,通过热处理-磷化过程制备了具有氧析出(OER)和氢析出(HER)双功能特性的CoP纳米纤维.该... 详细信息

高性能催化剂的开发和利用是能源领域的研究热点,其中制备具有高活性面积的一维纳米催化剂是目前的难点.本研究以金属有机框架(MOF)复合纤维为前驱体,通过热处理-磷化过程制备了具有氧析出(OER)和氢析出(HER)双功能特性的CoP纳米纤维.该MOF衍生策略也可以用来制备其他一维纳米材料,如Co_(3)O_(4)纳米纤维、Co/C纤维和CoP/C复合纤维.研究表明,CoP纳米纤维的直径约100 nm,长度可达几微米,具有较高的活性面积.通过Cu掺杂改性可以提高CoP纳米纤维的催化活性,碱性条件下测得其对OER和HER的过电位分别为330和170 mV,可与商业的贵金属催化剂相媲美.该工作也为一维双功能电极催化剂的制备及功能化提供了研究基础.

关键词：金属有机框架贵金属催化剂磷化过程纳米纤维复合纤维电催化过电位一维纳米材料

Optimum Maintenance Policy for a One-Shot System with Series Structure Considering Minimal Repair

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Applied Mathematics 2015年第2期6卷 326-331页

作者： Tomohiro kitagawa Tetsushi Yuge Shigeru Yanagi Department of Electrical and Electronic Engineering National Defense Academy Yokosuka Japan

One-shot systems such as missiles and extinguishers are placed in storage for a long time and used only once during their lives. Their reliability deteriorates with time even when they are in storage, and their failures are detected only through inspections for their characteristics. Thus, we need to decide an appropriate inspection policy for such systems. In this paper, we deal with a system comprising non-identical units in series, where only minimal repairs are performed when unit failures are detected by periodic inspections. The system is replaced and becomes “as good as new” when the nth failure of the system is detected. Our objective is to find the optimal inspection interval and number of failures before replacement that minimize the expected total system cost per unit of time.

关键词： One-Shot System Maintenance Policy Minimal Repair Cost Rate