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Enhancing mechanical behaviors of collapsible soil using two biopolymers

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第2期9卷 329-339页

作者： Mohamed Ayeldeen Abdelazim Negm Mostafa El-Sawwaf masaki Kitazume Structural Engineering Department Tanta UniversityTantaEgypt Faculty of Engineering Zagazig UniversityZagazigEgypt Civil and Environmental Engineering Department Tokyo Institute of TechnologyTokyoJapan

This study aims to investigate the possibility of using biopolymer(environmental friendly material) to enhance the mechanical behaviors of collapsible *** types of biopolymers were(xanthan gum and guar gum) used in this study due to their stable behaviors under severe conditions and their availability with reasonable *** experimental program focused on three major soil properties,*** characterizations,collapsible potential and shear *** three properties are essential in process of soil *** biopolymer concentrations were used in this study and the experimental program was performed at two curing periods(soon after mixing the soil with the biopolymer and after one week curing time).Shear parameters were measured for the treated specimens under both soaked and unsoaked conditions,while a collapsible potential test was performed under different mixing conditions(wet mix and dry mix).A numerical model was built to predict the behavior of the treated collapsible soil after and before water *** results indicated that the ability of both xanthan gum and guar gum can be used as improvement materials for collapsible soil *** collapsible potential has been reduced from 9%to 1%after mixing the soil with 2%biopolymer concentration in the wet *** one week curing,the cohesion has been increased from 8.5 kPa to105 kPa by increasing the xanthan gum concentration from zero to 2%,leading to an overall improvement in soil shear *** also proves that the guar gum is superior to the xanthan *** shear strength of soil can be increased by about 30%when using the guar gum in comparison with the xanthan gum at the same conditions;however,the collapsible potential of soil material will be reduced by about 20%.

关键词： Collapsing soil Xanthan gum Guar gum Collapsible potential Shear strength Compaction characterizations Numerical model

Benign esophageal stricture after thermal injury treated with esophagectomy and ileocolon interposition

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World Journal of Gastroenterology 2014年第27期20卷 9205-9209页

作者： Toshihiro kitajima Kota Momose Seigi Lee Shusuke Haruta Hisashi Shinohara masaki Ueno Takeshi Fujii Harushi Udagawa Department of Digestive Surgery Toranomon Hospital 2-2-2 Toranomon Minato-ku Tokyo 105-8470 Japan Department of Pathology Toranomon Hospital 2-2-2 Toranomon Minato-ku Tokyo 105-8470 Japan

Thermal injuries of the esophagus are rare causes of benign esophageal stricture, and all published cases were successfully treated with conservative management. A 28-year-old Japanese man with a thermal esophageal injury caused by drinking a cup of hot coffee six months earlier was referred to our hospital. The hot coffee was consumed in a single gulp at a party. Although the patient had been treated conservatively at another hospital, his symptoms of dysphagia gradually worsened after discharge. An upper gastrointestinal endoscopy and computed tomography revealed a pinhole like area of stricture located 19 cm distally from the incisors to the esophagogastric junction, as well as circumferential stenosis with notable wall thickness at the same site. The patient underwent a thoracoscopic esophageal resection with reconstruction using ileocolon interposition. The pathological findings revealed wall thickening along the entire length of the esophagus, with massive fibrosis extending to the muscularis propria and adventitia at almost all levels. Treatment with balloon dilation for long areas of stricture is generally difficult, and stent placement in patients with benign esophageal stricture, particularly young patients, is not yet widely accepted due to the incidence of late adverse events. Considering the curability and qualityof-life associated with a long expected prognosis, we determined that surgery was the best treatment option for this young patient. In this case, we decided to perform an esophagectomy and reconstruction with ileocolon interposition in order to preserve the reservoir function of the stomach and to avoid any problems related to the reflux of gastric contents. In conclusion, resection of the esophagus is a treatment option in patients with benign esophageal injury, especially in cases involving young patients with refractory esophageal stricture. In addition, ileocolon interposition may help to improve the quality-of-life of patients.

关键词： Thermal injury Benign esophageal stricture Esophag

An Efficient Framework to Utilize Grover Search

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南京邮电大学学报（自然科学版） 2011年第2期31卷 49-58页

作者： Shigeru Yamashita masaki Nakanishi College of Information Science and Engineering Ritsumeikan University

This paper proposes an efficient framework to utilize quantum search *** the best of our knowledge,this is the first paper to show a concrete usage of quantum search in general *** our framework,we can utilize a quantum computer as a coprocessor to speed-up some parts of a program that runs on a classical *** do so,we propose several new ideas and techniques,such as a practical method to design a large quantum circuits for search problems and an efficient quantum comparator.

关键词： quantum search general programming cooperation of quantum and classical computers quantum comparator quantum circuit design

Influence of the water jet system vs cavitron ultrasonic surgical aspirator for liver resection on the remnant liver

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World Journal of Clinical Cases 2022年第20期10卷 6855-6864页

作者： Takehiko Hanaki Ayumi Tsuda Teppei Sunaguchi Keisuke Goto masaki Morimoto Yuki Murakami Kyoichi Kihara Tomoyuki Matsunaga Manabu Yamamoto Naruo Tokuyasu Teruhisa Sakamoto Toshimichi Hasegawa Yoshiyuki Fujiwara Division of Gastrointestinal and Pediatric Surgery Department of SurgeryTottori University Faculty of MedicineYonago 683-8504TottoriJapan

BACKGROUND Several methods,such as finger fracture,Pean crush,cavitron ultrasonic surgical aspirator(CUSA),and water jet(WJ),are used for hepatic parenchymal dissection in liver *** is the conventional method in *** is a relatively novel method for parenchymal *** it has several advantages,such as lower volume of blood loss and shorter operative time,the effect of the WJ system for hepatic dissection on the remnant liver has not yet been *** To investigate and compare the effect of the WJ method vs CUSA on the remnant liver cut *** This observational study compared the two types of parenchymal transection methods(WJ vs CUSA)in liver *** total,24 and 40 patients who underwent hepatectomy using the WJ method and CUSA,respectively,were included in the ***,the clinicopathological characteristics and clinical outcomes of 24 and 40 patients were ***,postoperative contrast-enhanced computed tomography(CT)scan was performed to assess the cut surface length of the remnant liver and the degenerative thickness of the areas with a reduced contrast effect in the dissected ***,the two groups were *** On CT scan,the median areas of denaturation in the liver dissection planes were 522(range:109.5-1242)mm^(2) in the CUSA group and 324(range:93.6-1529)mm^(2) in the WJ *** area did not significantly differ between the two groups;however,the denaturation thickness of the WJ group was significantly lower than that of the CUSA group[5.8(range:0.7-11.1)mm vs 3.3(range:1.7-10.4)mm,P<0.001].CONCLUSION The WJ group had significantly thinner contrast-enhanced areas in the post hepatectomy detached section than the CUSA group.

关键词： Water jet Cavitron ultrasonic surgical aspirator Energy device Hepatic parenchymal dissection Liver resection

Is sarcopenic obesity superior to sarcopenia as a predicting indicator in patients with hepatocellular carcinoma following hepatic resection?

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Hepatobiliary Surgery and Nutrition 2020年第2期9卷 202-204页

作者： Shinji Itoh Tomoharu Yoshizumi masaki Mori Department of Surgery and Science Graduate School of Medical SciencesKyushu UniversityFukuokaJapan

The most common primary cancer derived from the liver is hepatocellular carcinoma(HCC),and its incidence is increasing globally(1).Hepatic resection has been established as a safe and effective treatment in patients with ***,the number of patients who develop recurrence after hepatic resection remains high(2).The body composition,which consists of the skeletal muscle mass and fat area,is an important used to determine the perioperative risk and prognosis in patients with cancer.

关键词： patients resection hepatic

Complete response to an anti-programmed cell death 1 antibody following a combination therapy of an anti-programmed cell death ligand 1 antibody and a tyrosine kinase inhibitor for metastatic renal cell carcinoma

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Asian Journal of Urology 2023年第1期10卷 103-105页

作者： Masayuki Kurokawa Sei Naito Tomoyuki Kato masaki Ushijima Atsushi Yamagishi Toshihiko Sakurai Hayato Nishida Norihiko Tsuchiya Department of Urology Yamagata University Faculty of MedicineYamagataJapan

Dear Editor,Several Phase 3 trials have demonstrated the efficacy of immune checkpoint inhibitor(ICI)-based combination therapies in the treatment of advanced clear cell renal cell carcinoma(RCC)[1-5].However,there is still no well-defined adequate treatment for patients who experience disease progression after initial ICI-based combination therapy.

关键词： death carcinoma treatment

Study of Electron Orbits for Formation of Toroidal Closed Flux Surface by ECH

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Plasma Science and Technology 2011年第3期13卷 342-346页

作者： Tak,ushi MAEKAWA Tomokazu YOSHINAGA Hitoshi TANAKA masaki UCHIDA Fumitake WATANABE Graduate School of Energy Science Kyoto University Kyoto 606-8502 Japan National Institute for Fusion Science Toki 509-5292 Japan

Electron orbits under the external vertical field （Bv） and the self poloidal field of the toroidal plasma current in a toroidal geometry are investigated by using analytic model fields in order to search for the conditions of occurence of appropriate confinement asymmetry of fast electrons along the field lines. This asymmetry efficiently and quickly generates a toroidal current, which may close the field lines in ECH-started plasmas. It is analytically shown that the characteristics of confinement asymmetry depend on the product of the major radius and the strength of the external vertical field. The results suggest that in large devices By should be lowered and also some artificial means to speed up the pitch angle scattering for the fast electrons at a higher energy range are beneficial to generate the toroidal current in order to close the filed

关键词： ECH closed flux surface electron orbit

Seismicity,structure and tectonics in the Arctic region

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Geoscience Frontiers 2015年第5期6卷 665-677页

作者： masaki Kanao Vladimir D.Suvorov Shigeru Toda Seiji Tsuboi National Institute of Polar Research.Research Organization of Information and Systems Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch Russian Academy of Sciences Department of Earth Sciences Faculty of EducationAichi University of Education Institute for Research on Earth Evolution Japan Agency for Marine-Earth Science and Technology

The "Arctic" region,where the North Pole occupies the center of the Arctic Ocean,has been affecting the environmental variation of the Earth from geological time to the ***,the seismic activities in the area are not adequately ***,by conducting long term monitoring of seismic phenomenon as sustainable parameters,our understanding of both the tectonic evolution of the Earth and the dynamic interaction between the cryosphere and geosphere in surface layers of the Earth will *** this paper,the association of the seismicity and structure of the Arctic region,particularly focused on Eurasian continent and surrounding oceans,and its relationship with regional evolution during the Earth’s history is *** target areas cover representative tectonic provinces in the Eurasian Arctic,such as the wide area of Siberia,Baikal Rift *** East Russia,Arctic Ocean together with Greenland and Northern *** on discussion including characteristics of seismicity,heterogeneous structure of the crust and upper mantle,tectonic history and recent dynamic features of the Earth’s surface in the Arctic are summarized.

关键词： Arctic region Seismicity Tectonics Earth’s structu

Foreword to the Special Issue on Micro- and Nano-Metrology in Japan(I)

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Nanomanufacturing and Metrology 2021年第2期4卷 1-2页

作者： Yuki Shimizu Yasuhiro Mizutani masaki Michihata Department of Finemechanics Tohoku UniversitySendai 9808579Japan Department of Mechanical Engineering Osaka UniversitySuita 5650871Japan Department of Precision Engineering The University of TokyoBunkyo 1138654Japan

Micro-and nano-metrology occupies an important position in modern production engineering where higher-precision machining is required.A visualization of the process is indispensable for the creation of new technologies in stateof-the-art manufacturing that deals with the geometrical quantity in micrometers/*** micro-and nano-metrology is thus becoming more and more important as the platform of various manufacturing technologies,as well as strategic tools for responding to rapidly changing fabrication techniques in many scientific and industrial fields.

关键词： metrology becoming Japan