检索结果-南通市图书馆

Sociology Study 2013年第9期3卷 639-650页

作者： Fuyuki Yoshikane Chizuko Takei keita tsuji Atsushi Ikeuchi Takafumi Suzuki University of Tsukuba Japan Toyo University Japan

This study examined Japanese patents in terms of the quantitative characteristics of application documents that resulted in the acquisition of rights in order to clarify the relationship between the features and patentability of applications. The groups of approved applications and those that had not been approved were compared for 12 variables： publication time lag; numbers of inventors, classifications, pages, figures, tables, claims, priority claims, countries for priority claims, cited patents, and cited non-patent documents; and median of citation age. Furthermore, the authors carried out the experiments in which patent applications were automatically classified into two groups by the machine learning method, random forests. As a result, statistically significant differences between the two groups were observed for the following variables （p 〈 .001）： the numbers of inventors, pages, figures, claims, priority claims, and countries for priority claims were significantly larger in the group of approved applications, while the time lag until publication was smaller. In particular, the publication time lag and the numbers of inventors, pages, and figures were variables representing the features that largely contribute to discriminating approved applications in the classification using random forests, which implies that these have relatively strong relationships with patentability.

关键词： Technology management intellectual property rights patent analysis sociology of science Japan

Effects of Aspect Ratio in a Transonic Shock Tube Airfoil Flow

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2012年第5期21卷 435-440页

作者： Masashi KASHITANI keita MIURA Shinichiro NAKAO Yutaka YAMAGUCHI Department of Aerospace Engineering National Defense Academy1-10-20 Hashirimizu Yokosuka 239-8686 JAPAN Department of Mechanical Engineering Nagasaki Institute of Applied Science 536 Aba-MachiNagasaki 851-0193 JAPAN

In the present study, the flow visualizations were performed around the NACA 0012 models which differ in aspect ratios. We discussed the effects of the aspect ratio in the test models. Additionally the unsteady, two-dimensional, compressible Euler equations were solved for the NACA 0012 airfoil. Experiments were performed utilizing the conventional gas driven shock tube as the intermittent transonic wind tunnel. The aspect ratios of the models are about 0.86 and 1.5, respectively. The Mach numbers M 2 are about 0.84. The Reynolds numbers of the present experimental conditions were constant that Re based on chord length is about 4.0×10 5 . The results are as follows: in different aspect ratios, the difference of the shock wave location is confirmed though the Mach number and Reynolds number are same. It indicates the different correction Mach number by the effects of the side wall boundary layer though the nominal Mach number measured the same value. Also, on the difference of shock wave location for the effects of the aspect ratio, the tend of CFD shows the qualitative agreement with the result of an experiment.

关键词： Shock tube Aerodynamics Transonic flows Aspect ratio Wind tunnel correction

Analysis of Machinable Structures and Their Wettability of Rotary Ultrasonic Texturing Method

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2016年第6期29卷 1187-1192页

作者： XU Shaolin SHIMADA keita MIZUTANI Masayoshi KURIYAGAWA Tsunemoto Division of Biomechanical Engineering Graduate School of Biomedical Engineering Tohoku University Department of Mechanical Systems Engineering Graduate School of Engineering Tohoku University

Tailored surface textures at the micro- or nanoscale dimensions are widely used to get required functional performances. Rotary ultrasonic texturing （RUT） technique has been proved to be capable of fabricating periodic micro- and nanostructures. In the present study, diamond tools with geometrically defined cutting edges were designed for fabricating different types of tailored surface textures using the RUT method. Surface generation mechanisms and machinable structures of the RUT process are analyzed and simulated with a 3D-CAD program. Textured surfaces generated by using a triangular pyramid cutting tip are constructed. Different textural patterns from several micrometers to several tens of micrometers with few burrs were successfully fabricated, which proved that tools with a proper two-rake-face design are capable of removing cutting chips efficiently along a sinusoidal cutting locus in the RUT process. Technical applications of the textured surfaces are also discussed. Wetting properties of textured aluminum surfaces were evaluated by combining the test of surface roughness features. The results show that the real surface area of the textured aluminum surfaces almost doubled by comparing with that of a flat surface, and anisotropic wetting properties were obtained due to the obvious directional textural features.

关键词： rotary ultrasonic texturing geometrically defined cutting edges surface generation mechanisms machinable structures,wetting properties

Engaging with the More-Than-Human and Decolonial Turns in the Land of Shinto Cosmologies: “Negative” Comparative Education in Practice

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ECNU Review of Education 2020年第1期3卷 46-65页

作者： keita Takayama Kyoto University

Purpose:In this explorative,self-reflective article,I attempt to extend the methodological discussion of a“negative”approach to comparative education that I have recently articulated ***,I demonstrate how I attempted to put in practice negative comparative education by drawing on my experience at the Shanghai workshop,Beyond the Western Horizon in Educational Research,organized by Iveta Silova,Jeremy Rappleye,and Yun You at the East China Normal ***/Approach/Methods:I conceive my participation in the Shanghai workshop as a disruptive moment wherein my previous forms of knowing and being were *** specifically,I discuss how my attempt to situate the ecofeminist and decolonial literature,the two of the three main bodies of literature introduced through the workshop,within the context of Japanese education triggered me to reconsider the role of Shinto in Japanese education and question my own firm identification with the liberal–left politics within ***:I reflect upon how the initial sense of discomfort and the remaining sense of ambivalence took me on a journey of unlearning and relearning about the limits of my knowing,my own political subjectivities,and the place of Shinto cosmologies in Japanese ***/Value:I conclude the discussion with a few provisional thoughts that point us to an approach to comparative education that makes our research“a matter of concern”across multiple linguistically bounded,national and regional scholarly communities.

关键词： Comparative education decolonial ecofeminism negative education Shinto

Gastric adenocarcinoma of fundic gland type with signet-ring cell carcinoma component: A case report and review of the literature

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2018年第26期24卷 2915-2920页

作者： keita Kai Masaaki Satake Osamu Tokunaga Department of Pathology Saga University Hospital Department of Gastroenterology Koga Hospital 21 Department of Pathology Shin Koga Hospital

A depressed lesion was found at a gastric angle of 76-yearold Japanese woman by esophagogastroduodenoscopy. Four years prior, she was diagnosed with a Helicobacter pylori infection but no eradication was performed. The pathological diagnosis of biopsy specimens was signet-ring cell carcinoma. Endoscopic submucosal dissection(ESD) was performed. Histopathological examination of the ESD specimen revealed proliferation of well-differentiated tubular adenocarcinoma mimicking fundic gland cells at the deep layer of the lamina propria mucosae. These tumor cells expressed focally pepsinogen-Ⅰ, diffusely MUC6, and scattered H^+/K^+ ATPase according to immunohistochemistry. Therefore, we diagnosed this tumor as gastric adenocarcinoma of fundic gland type(GA-FG). Adjacent to the GA-FG, proliferation of signet-ring cell carcinoma which diffusely expressed MUC 2 and MUC 5AC was observed. Intestinal metaplasia was focally observed in the surrounding mucosa of the signet-ring cell carcinoma. To the best of our knowledge, this is the first case report of GA-FG with a signet-ring cell carcinoma component. The origin of signet-ring cell carcinoma, i.e., whether it accidentally arose from a non-neoplastic mucosa and coexisted with the GA-FG or dedifferentiated from the GA-FG is unclear at present. We expect the accumulation of similar cases and further analysis to clarify this issue.

关键词： Gastric adenocarcinoma of fundic gland type Endoscopic submucosal dissection Helicobacter pylori Intestinal metaplasia Signet-ring cell carcinoma

Recent advances in ultrasonic-assisted machining for the fabrication of micro/nano-textured surfaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2017年第1期12卷 33-45页

作者： Shaolin XU Tsunemoto KURIYAGAWA keita SHIMADA Masayoshi MIZUTANI Division of Biomechanical Engineering Graduate School of BiomedicalEngineering Tohoku University Sendai 980-8579 Japan Department of Mechanical Systems Engineering Graduate School ofEngineering Tohoku University Sendai 980-8579 Japan

In this paper, the state of art of ultrasonic- assisted machining technologies used for fabrication of micro/nano-textured surfaces is reviewed. Diamond machining is the most widely used method in industry for manufacturing precision parts. For fabrication of fine structures on surfaces, conventional diamond machining methods are competitive by considering the precision of structures, but have limitations at machinable structures and machining efficiency, which have been proved to be partly solved by the integration of ultrasonic vibration motion. In this paper, existing ultrasonic-assisted machin- ing methods for fabricating fine surface structures are reviewed and classified, and a rotary ultrasonic texturing （RUT） technology is mainly introduced by presenting the construction of vibration spindles, the texturing principles, and the applications of textured surfaces. Some new ideas and experimental results are presented. Finally, the challenges in using the RUT method to fabricate micro/ nano-textured surfaces are discussed with respect to texturing strategies, machinable structures, and tool wear.

关键词： ultrasonic-assisted machining textured sur-face micro/nano-structures functional performance

Comparative Analysis of Tsunami Casualty Estimation Approaches: Agent-Based Modeling versus Simplified Approach in Japanese Coastal Cities

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2024年第5期15卷 719-737页

作者： Tomoyuki Takabatake Nanami Hasegawa keita Yamaguchi Miguel Esteban Department of Civil and Environmental Engineering Kindai University Department of Civil and Environmental Engineering Waseda University

Estimating potential casualties from a significant earthquake and tsunami event is crucial to enhance disaster preparedness and response. Although various approaches exist to assess potential casualties, few studies have made direct comparisons between them. The present study aimed to clarify the diff erences in the estimation of casualties between an agent-based model(ABM), which can capture detailed evacuation behavior but demands significant computational resources, and a simplified approach at less computational cost by assuming that evacuees would move along a straight line from their initial location to the closest evacuation destination. These diff erent approaches were applied to three coastal cities in Japan—Mihama,Kushimoto, and Shingu in Wakayama Prefecture—revealing significant diff erences in the estimated results between the ABM and the simplified approach. Notably, when the eff ects of building collapse due to an earthquake were considered, the mortality rates estimated by the ABM were higher than those estimated by the simplified approach in the three cities. There were also significant diff erences in the spatial distribution of the estimated mortality rates between the ABM and the simplified approach. The findings suggest that while the simplified approach can yield results more quickly, casualty estimates derived from such models should be interpreted with caution.

关键词： Agent-based modeling Building collapse Casualty estimation Evacuation Japan, Tsunami

Systemic RNAi of V-ATPase subunit B causes molting defect and developmental abnormalities in Periplaneta fuliginosa

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2019年第4期26卷 721-731页

作者： Kazuki Sato keita Miyata Sota Ozawa Koichi Hasegawa Laboratory of Nematology Department of Applied Biological Sciences Saga University Honjo 1 Saga Japan The United Graduate School of Agricultural Sciences Kagoshima University Korimoto 1-21-24 Kagoshima Japan Department of Biomedical Sciences College of Life and Health Sciences Chubu University Kasugai Aichi Japan Department of Environmental Biology College of Bioscience & Biotechnology Chubu University Kasugai Aichi Japan

The vacuolar (H+)-ATPases (V-ATPases) are ATP-driven proton pumps with multiple functions in many organisms. In this study, we performed structural and functional analysis of vha55 gene that encodes V-ATPase subunit B in the smokybrown cockroach Periplaneta fuliginosa (Blattodea). We observed a high homology score of the deduced amino acid sequences between 10 species in seven orders. RNAi of the vha55 gene in R fuliginosa caused nymphal/nymphal molting defects with incomplete shedding of old cuticles, growth inhibition, as well as bent and wrinkled cuticles of thoraxes and abdominal segments. Since growth inhibition caused by vha55 RNAi did not interfere in the commencement of cockroach molting, molting timing and body growth might be controlled by independent mechanism. Our study suggested V-ATPases might be a good candidate molecule for evolutionary and developmental studies of insect molting.

关键词： Blattodea cockroach molting Periplaneta fuliginosa RNA interference vacuolar-type H+-ATPase

Comment on review article:Chronic hepatitis C virus infection cascade of care in pediatric patients

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第14期28卷 1494-1498页

作者： Nouhoum Bouare Mamadou keita Jean Delwaide Biomedical Sciences National Institute of Public HealthBamako 1771Mali Department of Prevention Medical and Psychosocial ManagementCSLSHIV-TB-HBamako E 595Mali Department of Gastroenterology and Hepatology CHULiegeLiege 4000Belgium

An enhanced cascade of care should include a younger population,helping to achieve the goal of the World Health Organization with a focus on elimination in the pediatric ***,enhanced screening and awareness efforts and continued education of health care providers will improve the outcomes of chronic hepatitis C virus(HCV)infection in the pediatric *** present work discusses and comments on the topic"cascade of care in HCV chronic pediatric patients".

关键词： Cascade of care Hepatitis C virus Chronic patients Pediatric population Disease management Commentary

Gallbladder cancer: Clinical and pathological approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2014年第10期2卷 515-521页

作者： keita Kai Shinichi Aishima Kohji Miyazaki Department of Pathology and Microbiology Faculty of Medicine Saga University Department of Pathology Saga University Hospital Department of Surgery Faculty of Medicine Saga University

Gallbladder cancer(GBC) shows a marked geographical variation in its incidence. Middle-aged and elderly women are more commonly affected. Risk factors for its development include the presence of gallstones, chronic infection and pancreaticobiliary maljunction. Controversy remains in regard to the theory of carcinogenesis from adenomyomatosis, porcelain gallbladder and adenoma of the gallbladder. The surgical strategy and prognosis after surgery for GBC differ strikingly according to T-stage. Discrimination of favorable cases, particularly T2 or T3 lesions, is useful for the selection of surgical strategies for individual patients. Although many candidate factors predicting disease progression, such as depth of subserosal invasion, horizontal tumor spread, tumor budding, dedifferentiation, Ki-67 labeling index, p53 nuclear expression, CD8+ tumor-infiltrating lymphocytes, mitotic counts, Laminin-5-gamma-2 chain, hypoxia-inducible factor-1a, cyclooxygenase-2 and the Hedgehog signaling pathway have been investigated,useful prognostic makers or factors have not been established. As GBC is often discovered incidentally after routine cholecystectomy and accurate preoperative diagnosis is difficult, close mutual cooperation between surgeons and pathologists is essential for developing a rational surgical strategy for GBC.

关键词： Gallbladder cancer Surgical strategy Pathology Prognostic factors