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Diagnostic ability of multi-detector spiral computed tomography for pathological lymph node metastasis of advanced gastric cancer

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World Journal of Gastrointestinal Oncology 2020年第4期12卷 435-446页

作者： Zhi-Yong Jiang Shinichi Kinami Naohiko Nakamura Takashi Miyata hideto fujita Hiroyuki Takamura Nobuhiko Ueda Takeo Kosaka Department of Surgical Oncology Kanazawa Medical University1-1 DaigakuUchinada-machiKahoku-gunIshikawa 920-0293Japan

BACKGROUND The reliability of preoperative nodal diagnosis of advanced gastric cancer by multi-detector spiral computed tomography(MDCT)is still *** To examine the diagnostic ability of MDCT more precisely by using data on intranodal pathological metastatic *** A total of 108 patients with advanced gastric cancer who underwent MDCT and curative gastrectomy at Kanazawa Medical University Hospital were enrolled in this *** nodal sizes measured on computed tomography(CT)images were compared with the pathology results.A receiver-operating characteristic curve was constructed,from which the critical value(CV)was calculated by using the data of the first 69 patients *** using the CV,sensitivity and specificity were calculated with prospectively collected data from 39 consecutive *** enabled a more precise one-to-one correspondence of lymph nodes between CT and pathological examination by using the size data of lymph node *** intranodal pathological metastatic patterns were classified into the following four types:Small nodular,peripheral,large nodular,and *** Although all the cases were clinically suspected as having metastasis,81 had lymph node metastasis and 27 had no *** number of dissected,detected on CT,and metastatic nodes were,4241,897,and 801,*** CV obtained from the receiver-operating characteristic was 7.6 mm for the long *** sensitivity was 91.4%and the specificity was 47.3%in the prospective *** large nodular and diffuse metastases were easy to diagnose becausemetastatic nodes with a large axis often exhibit these *** The ability of MDCT to contribute to a nodal diagnosis of advanced gastric cancer was examined prospectively with precise size data from node mapping,using a CV of 7.6 mm for the long axis that was calculated from the retrospectively collected *** sensitivity was as high as 91%,and would be improved when referring to the en

关键词： Advanced gastric cancer Lymph node metastasis Multi-detector spiral computed tomography Pathological diagnosis

Efficacy of the fat-dissociation method for nodal harvesting in gastric cancer

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World Journal of Gastrointestinal Surgery 2020年第6期12卷 277-286页

作者： Shinichi Kinami Toshio Ohnishi Naohiko Nakamura Zhi Yong Jiang Takashi Miyata hideto fujita Hiroyuki Takamura Nobuhiko Ueda Takeo Kosaka Department of Surgical Oncology Kanazawa Medical UniversityKahoku-gunIshikawa920-0293Japan

BACKGROUND There is an increased need for accurate staging for gastric cancer ***, it is necessary to carefully examine all dissected lymph nodes for precise staging. Recently, the fat-dissociation method has been developed as a quick and accurate method for harvesting dissected lymph nodes of colorectal cancer *** To investigate the usefulness of the fat-dissociation method for harvesting dissected lymph nodes of gastric cancer *** Fifty-six resected specimens from gastric cancer patients who underwent standard curative gastrectomy and lymph node dissection at our hospital were used. Group 2 lymph nodes were separated from each specimen, and the remaining adipose tissue containing the group 1 lymph nodes was used. Some resected specimens were subjected to the fat-dissociation method. One vial of Imofully~? was dissolved in 50 m L of saline and injected into the tissue. The tissue was incubated for 1 h and the dissolved fat was removed. Subsequently, the nodes were identified, picked up with scissors, and mapped. The number of nodes in each lymphatic compartment and duration of lymph node harvest and mapping were *** The fat-dissociation method was used for 24 samples, while the conventional dissection method was used for 32 samples. The total number of harvested lymph nodes was 45.9 in the fat dissociation group and 44.3 in the control group, and there was no significant difference between the two groups. There were also no significant differences in the number of lymph nodes between the two groups based on a comparison of the lymphatic compartments. However, the total median duration of the fat-dissociation method was 38.2 min, reflecting a reduced duration of approximately 60 min compared to the control *** Based on our results, the fat-dissociation method is effective in shortening the duration of lymph node harvest in gastric cancer surgery.

关键词： Gastric cancer Lymph node dissection Staging Lymph node mapping Fatdissociationmethod Efficacy

EFFECTIVE AUTOMATED NEGOTIATION BASED ON ISSUE DENDROGRAMS AND PARTIAL AGREEMENTS

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Journal of Systems Science and Systems Engineering 2018年第2期27卷 201-214页

作者： ShinjiKakimoto Katsuhide fujita Institute of Engineering Tokyo University of Agriculture and Technology

Negotiation is both an important topic in multi-agent systems research and an important aspect of daily life. Many real-world negotiations are complex and involve multiple interdependent issues, therefore, there has been increasing interest in such negotiations. Existing nonlinear automated negotiation protocols have difficulty in finding solutions when the number of issues and agents is large. In automated negotiations covering multiple independent issues, it is useful to separate out the issues and reach separate agreements on each in turn. In this paper, we propose an effective approach to automated negotiations based on recursive partitioning using an issue dendrogram. A mediator first finds partial agreements in each sub-space based on bids from the agents, then combines them to produce the final agreement. When it cannot find a solution, our proposed method recursively decomposes the negotiation sub-problems using an issue dendrogram. In addition, it can improve the quality of agreements by considering previously-found partial consensuses. We also demonstrate experimentally that our protocol generates higher-optimality outcomes with greater scalability than previous methods.

关键词： Multi-issue negotiation issue dendrogram partial agreement

EFFECT OF W ON MECHANICAL PROPERTIES OF 12%Cr HEAT-RESISTANT STEEL

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Acta Metallurgica Sinica(English Letters) 1992年第2期5卷 95-100页

作者： fujita Toshio The University of Tokyo TokyoJapan

The effect of W on mechanical properties of 12% Cr-W-V-Nb heat resistant steel at high temperatures and room temperature is *** experimental results indicated that if the W content was about 2.2—3.0 wt-%,there was no obviously change of *** strength, but impact toughness decreased with the rise of W *** the other hand,the increase of W content enhanced the short time stress rupture strength,but did not for the long time one. The increase of W have two effects on the precipitation behavior,promoting Laves formation of type Fe_2W,increasing the precipitated phase amount and speeding up the coarsening pro- cess of precipitated phase at high *** effect of W on the mechanical properties is closely associated with precipitation *** the rupture life is short,there has no enough time to coarsen the precipitated phases,so the increase of precipitated phases results in strengthening effect,*** W increases the high temperature *** prolonged expo- sure,the evident coarsening took plaee,that decreased the effect of precipitation.

关键词： 12%Cr-W-V-Nb steel martensitic heat-resistant steel Laves phase precipitation behavior

Property of critical excitation for moment-resisting frames subjected to horizontal and vertical simultaneous ground motions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第11期10卷 1561-1572页

作者： Kohei fujita Izuru TAKEWAKI Department of Urban and Environmental Engineering Graduate School of Engineering Kyoto University

It has often been reported that, when building structures are subjected to near-fault earthquake ground motions, horizontal and vertical impulsive inputs may cause critical damage during the first few seconds. In practical design of building structures, however, the safety check, taking into account the effect of multi-component ground motions, is hardly conducted except the design of important structures such as high-rise buildings and nuclear power plants. Ftirthel＇more, it is not clear how the correlation of multi-component ground motions influences the actual safety of structures. In this paper, the detailed property of critical excitation is discussed in association with the relationship between the characteristics of ground motions and those of structures. The properties of various auto power spectral density （PSD） functions of the horizontal and vertical ground motions are investigated, and those of the critical cross PSD function of these two-directional ground motions are found by a devised algorithm in a feasible complex plane. A closed-form expression is derived from the critical relation of the auto PSD functions of the simultaneous inputs. This critical excitation method provides us with a new approach for earthquake-resistant design against the possible future earthquake which causes the critical damages to buildings.

关键词： Critical excitation Multi-component ground input Critical cross spectrum Coherency Simultaneous input

Penetration analysis of elements and bioleaching treatment of spent refractory for recycling

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Journal of Environmental Sciences 2007年第9期19卷 1146-1152页

作者： TATEDA Masafumi fujita Masanori College of Technology Toyama Prefecture University5180 KurokawaImizuToyama 939-0398 Japan Kochi National College of Technology 200-1 Monobe-OtsuNamgokuKochi 783-8508 Japan

Acidithiobacillusferrooxidans ATCC23270 and Acidithiobacillus thiooxidans TM-32 were used for bioleaching of spent refractories of aluminium and copper melting furnaces for their recycling. Firstly, penetration of elements into ahiminium melting furnace refractory was investigated and it was found that up to 7 cm from surface was contaminated. Comparison on leaching efficiency by the strains ATCC23270 and TM-32 found that the strain ATCC23270 could treat larger amount of the refractories than the strain TM-32 could do. In the experiment of bioleaching of spent refractory alumiulum melting furnace by the strain ATCC23270, high leaching efficiency were obtained on A1, Si, and Ca, and extremely low leaching performance was, however, shown on the rest of elements i.e., Na, Mn, and Zn. Under the strain TM-32 use, relatively high leaching performance was recognized on A1, Si, Ca, Na, Mn, and Zn. In the experiment of bioleaching for spent refractory copper melting furnace, almost the same leaching trends were shown on Cu, Zn, A1, and Si under the strains ACTT23270 and TM-32 uses.

关键词： spent refractory penetration of elements bioleaching recycling

A new veratramine alkaloid from the bulbs of Fritillaria hupehensis

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Chinese Chemical Letters 2007年第2期18卷 175-177页

作者： Tetsuro fujita Faculty of Pharmaceutical Sciences Kyoto UniversityKyoto 606-01Japan

A new highly conjugated alkaloid of veratramine type, 22S,25S,5α-veratramine-7(8),12(14)-diene-3β,13β,23β-triol-6-one (1), was isolated from the bulbs of Fritillaria hupehensis Hsiao et K.C. Hsia. Its structure wa... 详细信息

关键词： Fritillaria hupehensis Alkaloid Veratramine group

IMPLEMENTATION OF 3-VALUED PARACONSISTENT LOGIC PROGRAMMING TOWARDS DECISION MAKING SYSTEM OF AGENTS

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Journal of Systems Science and Systems Engineering 2018年第3期27卷 322-339页

作者： Yuki Goto Megumi fujita Naoyuki Nide Graduate School of System Informatics Kobe University (Until Mar. 2018) Faculty of Science and Engineering Kindai University Faculty Division of Human Life and Environmental Sciences Nara Women's University

Due to the rapid development of applications of artificial intelligence and robotics in recent years, the necessity of reasoning and decision making with uncertain and inaccurate information is increasing. Since robots in the real world are always exposed to behavioral inaccuracies and uncertainty arising from recognition methods, they may occasionally encounter contradictory facts during reasoning on action decision. Paraconsistent logic programming is promising to make appropriate action decisions even when an agent is exposed to such uncertain information or contradictory facts, but there has been no implementation of this programming to the best of our knowledge. We propose a resolution algorithm for the 3-valued paraconsistent logic programming system QMPT0 and its implementation on SWI-Prolog. We also describe an application of the 3-valued paraconsistent logic programming regarding agent decision making.

关键词： Agent-based modelling for complex systems paraconsistent logic programming solver implementation declarative programming application for agents

Unsteady Behavior of Surge and Rotating Stall in an Axial Flow Compressor

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Journal of Thermal Science 2012年第4期21卷 302-310页

作者： Yutaka OHTA Yutaka fujita Daisuke MORITA Department of Applied Mechanics and Aerospace Engineering Waseda University 3-4-1 Okubo Shinjuku Graduate Student Graduate School of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku

Unsteady behaviors as well as unsteady cascade flow fields of a single-stage axial flow compressor were experi- mentally investigated by detail measurements of unsteady performance characteristics and casing wall pressure and internal flow velocity fluctuations. The main feature of the test compressor is a capacity tank connected di- rectly to the compressor outlet in series through slits and a concentric duplex pipe, and also jet nozzles in order to inject compressed air toward the rotor tip region. Research attention is focused on the post-stall characteristics of surge and rotating stall which occur simultaneously. When the compressor was connected to the capacity tank, surge was generated with rotating stall in accordance with the capacitance increment of whole compressor system The surge behavior changed irregularly with throttling valve installed behind the compressor, and several types of surge cycles were observed. In addition, the surge cycle changed by jet injection to the rotor tip region. The re- suits suggested that the blockages of the cascade flow which were generated by a stall cell play an important role in deciding the surge behaviors.

关键词： Axial flow compressor Surge Rotating stall Stall cell Jet injection