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Buckling Load Evaluation Method for Single Layer Cylindrical Lattice Shells

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Journal of Civil Engineering and Architecture 2012年第3期6卷 268-279页

作者： Seishi yamada Department of Architecture and Civil Engineering Toyohashi University of Technology Toyohashi 441-8580 Japan

A rational design evaluation procedure is investigated for the elastic overall buckling load carrying capacity of single layer cylindrical lattice shell roof structures. The nature of the imperfection sensitivity of these structures is for the first time reviewed in this paper. This allows the development of the reduced stiffness buckling analytical concept for the lattice shells based upon the introduction of a simple lower bound estimation equation through the use of the so-called continuum shell analogy theory. The linear and nonlinear buckling loads found from conventional finite element analyses are compared with the present estimations. Finally, the elastic-plastic load carrying capacity estimation method through the use of the present elastic lower bound criteria is also proposed.

关键词： Metal lattice shell Buckling design formula cylindrical barrel vault roof structure.

Cases of pediatric intra-abdominal solid organ injury induced by blunt trauma experienced over a 15-year period at two centers in Japan

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World Journal of Pediatric Surgery 2023年第3期6卷 168-174页

作者： Mayu Matsui Koshiro Sugita Takafumi Kawano Nanako Nishida Ayaka Nagano Masakazu Murakami Keisuke Yano Toshio Harumatsu Shun Onishi Koji yamada Waka yamada Mitsuru Muto Tatsuru Kaji Satoshi Ieiri Department of Pediatric Surgery Kagoshima City HospitalKagoshimaJapan Department of Pediatric Surgery Research Field in Medical and Health SciencesMedical and Dental AreaResearch and Education AssemblyKagoshima UniversityKagoshimaJapan Department of Pediatric Surgery Kurume University School of MedicineKurumeJapan

Objective The present study attempts to clarify the clinical features of pediatric intra-abdominal solid organ injury at two *** The injured organ,patient age,sex,injury grade,imaging findings,intervention,length of hospital stay,and complications were retrospectively reviewed using medical records at two centers from 2007 to *** There were 25 cases of liver injury,9 of splenic injury,8 of pancreatic injury,and 5 of renal *** mean age of all patients was 8.6±3.8 years old,with no difference between organ injury *** intervention was performed in four cases of liver injury(16.0%)and one case of splenic injury(11.1%),and surgery was performed in two cases of liver injury(8.0%)and three cases of pancreatic injury(37.5%).All other cases were treated *** included adhesive ileus in one case of liver injury(4.0%),splenic atrophy in one case of splenic injury(11.1%),pseudocysts in three cases of pancreatic injury(37.5%),atrophy of the pancreatic parenchyma in one case of pancreatic injury(12.5%),and urinoma in one case of renal injury(20.0%).No mortalities were *** Pediatric patients with blunt trauma had favorable outcomes at two pediatric trauma centers covering a broad medical area,including remote islands.

关键词： pediatric trauma injury

Multiphase surfactant-assisted reaction-separation system in a microchannel reactor

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Frontiers of Chemical Science and Engineering 2009年第1期3卷 33-38页

作者： Saah ALJBOUR Tomohiko TAGAWA Mohammad MATOUQ Hiroshi yamada Department of Chemical Engineering Nagoya UniversityChikusaNagoya 464-8603Japan 2 Faculty of Engineering TechnologyAl-Balqa Applied UniversityAmman 11134Jordan

The Lewis acid-catalyzed addition of tri-methylsilyl cyanide to p-chlorobenzaldehyde in a micro-channel reactor was *** microchannel was integrated to promote both reaction and separation of the biphase ***3 and Cu(triﬂate)2 were used as water-stable Lewis acid *** dodecyl sulfate was incorporated in the organic-aqueous system to enhance the reactivity and to manipulate the multiphaseﬂow inside the *** was found that the dynamics and the kinetics of the multiphase reaction were affected by the new micellar *** multiphaseﬂow inside the microchannel was obtained,allowing for continuous and acceptable phase *** selectivity was achieved by operating at lower conversion values.

关键词： Lewis acid catalysis multiphase reactions process intensiﬁcation microchannel reactor green engi-neering

Z-bpy,a New C2-Symmetric Bipyridine Ligand and Its Application in Enantioselective Copper(Ⅰ)-Catalyzed Cyclopropanation of Olefins

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Chinese Journal of Chemistry 2019年第8期37卷 807-810页

作者： Yizhao Ouyang Miao Zhan Jing Zhou Jiao Jiao Hao HU Yoichi M.A.yamada Pengfei Li Frontier Institute of Science and Technology Xi'an Jiaotong UniversityXi'anShaanxi 710054China Department of Applied Chemistry School of ScienceXi'an Jiaotong UniversityXi'anShaanxi 710049China Xi'an Key Laboratory of Sustainable Energy Materials Chemistry Xi'an Jiaotong UniversityXi'anShaanxi 710049China RIKEN Center for Sustainable Resource Science WakoSaitama 3510198Japan

Summary of main observation and conclusion A rigid C2-symmetric chiral bipyridine ligand Z-bpy with a triptycene-like backbone was designed and synthesized from simple chemicals in a scalable *** this new ligand,copper(Ⅰ) catalyzed cyclopropanation of styrenes with commercial ethyl diazoacetate produced various corresponding cyclopropanes in high yields,diastereoselectivity and enantioselectivity up to 97% ee.

关键词： Its was

A Case of Septic Arthritis of the Shoulder Joint That Developed after Suprascapular Nerve Block

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Open Journal of Orthopedics 2020年第2期10卷 25-32页

作者： taihei Go Toshiyuki Tsutsui Yasuaki Iida Katsunori Fukutake Ryoichi Fukano Kosei Ishigaki Masayuki Sekiguchi Hiroshi Takahashi Department of Orthopedics Toho University Tokyo Japan Department of Orthopedics Sagamihara Chuo Hospital Kanagawa Japan Department of Orthopedics Omori Red Cross Hospital Tokyo Japan Department of Orthopedics Japan Community Health Care Organization Tokyo Kamata Medical Center Tokyo Japan

Septic arthritis of the shoulder is uncommon in the immunocompetent patient with no previous risk factors for joint infection. We treated an immunocompetent patient who developed septic arthritis of the shoulder after suprascapular nerve block for pain due to rotator cuff tear. An 80-year-old man with no underlying disease visited a nearby orthopedics clinic with complaint of left shoulder joint pain. Left suprascapular nerve block was performed, but the pain gradually aggravated. On the day after the block, he had a fever of 39°C and came to our department. On examination, enlargement and tenderness were present at the injection site. Cellulitis at the site was suspected. He was admitted and administration of a cephem anti-biotic was started. Pain subsequently decreased. Magnetic resonance imaging (MRI) performed 4 days after hospitalization showed massive effusion close to the injection site. The effusion spread into the joint cavity through the tear site of the supraspinatus. Septic arthritis of the shoulder was strongly suspected, open irrigation and debridement were performed 11 days after hospitalization. After surgery, pain immediately improved. In our case the extra-articular infection caused by suprascapular nerve block considered to spread into the shoulder joint cavity through the site of rotator cuff tear, although there have been no reports of such cases. This case suggests the possibility that patients with rotator cuff tear may easily develop septic arthritis because extra-articular infection may spread into the joint cavity through the site of tear.

关键词： Septic Arthritis of the Shoulder Joint Suprascapular Nerve Block Rotator Cuff Tear

新型糖基聚合物的合成及其作为高效液相色谱手性固定相的应用(英文)

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色谱 2016年第1期34卷 4-9页

作者： Tomoyuki IKAI Takayuki yamada Graduate School of Natural Science and Technology Kanazawa University

Two novel polymers containing glucose units as the main-chain that only differ in terms of their regioregularity were synthesized to evaluate their chiral recognition abilities as chiral stationary phases(CSPs)for high performance liquid chromatography(HPLC).The regioregular polymer(poly-5)shows clear resolution ability for the racemate of cobalt(Ⅲ)acetylacetonate(Co(acac)3),whereas the corresponding regioirregular polymer(poly-3)does not show any chiral recognition for Co(acac)*** regioregular polymer main-chain seems to play an important role not only in providing an efficient interaction with the racemate but also in expressing the chiral recognition ability as a CSP for HPLC.

关键词：金属有机骨架化合物手性分离对映异构体选择性苇墩

Acupuncture improved lipid metabolism by regulating intestinal absorption in mice

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World Journal of Gastroenterology 2020年第34期26卷 5118-5129页

作者： Jia Han Xin Guo Xiang-Jin Meng Jing Zhang Reimon Yamaguchi Yoshiharu Motoo Sohsuke yamada Department of Pathology and Laboratory Medicine Kanazawa Medical UniversityIshikawa 920-0293Japan Department of Oncology Kanazawa Medical UniversityIshikawa 920-0293Japan Department of Pathology Kanazawa Medical University HospitalIshikawa 920-0293Japan Department of Dermatology Kanazawa Medical UniversityIshikawa 920-0293Japan

BACKGROUND Non-alcoholic fatty liver disease(NAFLD),in which abnormal lipid metabolism plays an important role in disease progression,has become a *** lipid metabolism,for example an increased fat intake,has been thought to be an initial factor leading to *** small intestine is the main site of dietary lipid absorption.A number of clinical trials have shown that acupuncture has positive effects in the regulation of lipid metabolism,which is closely associated with the progression of *** therefore hypothesized that,acupuncture can improve the conditions of NAFLD by regulating intestinal absorption of *** To study the role of acupuncture treatment in the improvement of metabolic syndrome secondary to NAFLD by mouse *** 8-wk-old male C57BL/6J mice were fed a methionine-and choline-deficient diet for 3 ***,all mice were separated randomly into acupoints group(AG)or non-acupoints group(NG)with high fat diet *** treatment was performed at Zu san li,Guan yuan and Yong quan acupoints as acupuncture treatment to AG mice while non-acupoints place to NG ***,mice were anesthetized with an injection of ketamine-medetomidine and euthanized by *** An apparent improvement of obesity was found in AG mice after acupuncture *** AG mice,the body weight was much lower(22.6±1.2 g vs 28.1±1.0 g,P<0.005)in comparison to NG *** length of small intestine in AG mice was significantly shorter(26.7±2.3 cm vs 32.7±2.7 cm,P<0.005).A large amount of chyme was observed in the lumen of the AG small *** expression of microsomal triglyceride transfer protein,apolipoprotein B and apolipoprotein C2 was ***(TGs),total cholesterol and nonesterified fatty acid(NEFA)levels of the small intestinal tissue were significantly higher in AG mice,but the serum TGs and NEFA levels were reduced in AG *** These results indicate that acupuncture at Zu san li,Guan yuan and

关键词： Acupuncture Non-alcoholic fatty liver disease Small intestine Lipid metabolism Apolipoproteins

Age-dependent eradication of Helicobacter pylori in Japanese patients

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World Journal of Gastroenterology 2010年第33期16卷 4176-4179页

作者： Satoshi Mamori Akihiro Higashida Fumiaki Kawara Katsuhiro Ohnishi Akihiko Takeda Eri Senda Cho Ashida Hajime yamada Department of Gastroenterology and Hepatology Shinko Hospital

AIM:To determine the general risk factors affecting the failure rate of first-line eradication therapy in Japanese patients with Helicobacter pylori(***)***:The present study enrolled 253 patients who had an *** infection,underwent gastroendoscopy,and were treated with *** eradication *** therapy consisted of 30 mg lansoprazole plus 750 mg amoxicillin and 400 mg clarithromycin twice daily for 7 *** of the patients underwent a 13 C urea breath test at least 1 mo after the completion of eradication *** current study investigated the independent factors associated with successful *** eradication using a multiple logistic regression ***:The overall success rate in the patients was 85.8%.Among the general factors examined in the multivariate analyses,only having an age less than 50 years was found to be significantly associated with a poor response to *** ***,side effects were the only clinical factors in the patients who were under 50 years of age that significantly influenced the poor response to *** ***:***-positive elderly patients should undergo eradication *** addition,it is necessary to improve *** eradication therapy in younger patients.

关键词： Helicobacter pylori Eradication Treatment Age Side effect

Effect of Cold-Rolling on Precipitation Phenomena in Sensitized Type 316L and 304L Austenitic Stainless Steels

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材料热处理学报 2004年第5期25卷 217-222页

作者： H.Tsubakino A.Yamamoto T.yamada L.Liu M.Terasawa S.Nakahigashi H.Harada GraduateSchoolofEngineering UniversityofHyogoHimejiHyogoJapan GraduateStudent UniversityofHyogoHimejiHyogoJapan JapanPowerEngineeringandInspectionCo. YokohamaKanagawaJapan Koyo-SeikoCo.Ltd. KashiwaraOsakaJapan

Precipitation phenomena in Type 316L and 304L stainless steels were studied mainly by transmission electron microscopic (TEM) observations after cold-rolling ranging from 0% (as solution annealed) to 80% reduction in thickness, and then by sensitization treatment. Precipitates were identified by electron diffraction analysis and EDS analysis. Precipitates observed in sensitized 316L stainless steel were sigma and chi phases, whereas carbide and sigma were observed in sensitized 304L stainless steel. Recrystallized grains were formed in 30% cold-rolled and sensitized 304L. However, the tendency toward recrystallization in sensitized 316L was much lower than in 304L. Precipitation of sigma and chi phases was accelerated by cold-rolling and they were observed at grain boundaries in lower cold-rolling; they were also seen, in grain interiors in higher cold-rolling. Higher deformation induced partially recrystallization combined with precipitation, resulting in the formation of heterogeneous microstructures.

关键词：冷轧 316L 304L 奥氏体不锈钢 TEM