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Comparison of linac-based fractionated stereotactic radiotherapy and tomotherapy treatment plans for intra-cranial tumors

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Chinese Physics C 2010年第11期34卷 1768-1774页

作者： Jang Bo Shim Suk Lee Sam Ju Cho Sang Hoon Lee Juree Kim Kwang Hwan Cho Chul Kee Min Hyun Do Huh Rena Lee Dae Sik Yang Young Je Park Won Seob Yoon Chul Yong Kim soo il kwon Department of Radiation Oncology College of MedicineKorea University Department of Medical Physics Kyonggi University Department of Radiation Oncology College of MedicineEulji University Department of Radiation Oncology Cheil General Hospital & Women's Healthcare CenterKwandong University College of Medicine Department of Radiation Oncology Soonchunhyang University Boocheon Hospital Department of Radiation Oncology Konyang University Hospital Department of Radiation Oncology Inha University Hospital Department of Radiation Oncology School of MedicineEwha Womans University

This study compares and analyzes stereotactic radiotherapy using tomotherapy and linac-based fractionated stereotactic radiotherapy in the treatment of intra-cranial tumors,according to some *** this study,linac-based fractionated stereotactic radiotherapy and tomotherapy treatment were administered to five patients diagnosed with intra-cranial cancer in which the dose of 18–20 Gy was applied on 3–5 separate *** tumor dosing was decided by evaluating the inhomogeneous index （II） and conformity index （CI）.Also,the radiation-sensitive tissue was evaluated using low dose factors V1,V2,V3,V4,V5,and V10,as well as the non-irradiation ratio volume （NIV）.The values of the II for each prescription dose in the linacbased non-coplanar radiotherapy plan and tomotherapy treatment plan were （0.125±0.113） and （0.090±0.180）,respectively,and the values of the CI were （0.899±0.149） and （0.917±0.114）,*** low dose areas,V1,V2,V3,V4,V5,and V10,in radiation-sensitive tissues in the linac-based non-coplanar radiotherapy plan fell into the ranges 0.3%–95.6%,0.1%–87.6%,0.1%–78.8%,38.8%–69.9%,26.6%–65.2%,and 4.2%–39.7%,respectively,and the tomotherapy treatment plan had ranges of 13.6%–100%,3.5%–100%,0.4%–94.9%,0.2%– 82.2%,0.1%–78.5%,and 0.3%–46.3%,*** the NIV for each organ,it is possible to obtain similar values except for the irradiation area of the brain *** percentages of NIV10%,NIV20%,and NIV30%for the brain stem in each patient were 15%–99.8%,33.4%–100%,and 39.8%–100%,respectively,in the fractionated stereotactic treatment plan and 44.2%–96.5%,77.7%–99.8%,and 87.8%–100%,respectively,in the tomotherapy treatment *** order to achieve higher-quality treatment of intra-cranial tumors,treatment plans should be tailored according to the isodose target volume,inhomogeneous index,conformity index,position of the tumor upon fractionated stereotactic radiosurgery,and radiation dosage for radiation-sensitive tissues.

关键词： fractionated stereotactic radiotherapy tomotherapy treatment plan virtual organ delineation

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Emamectin benzoate 9.7%SL as a new formulation for a trunkinjections against pine wood nematode,Bursaphelenchus xylophilus

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Journal of Forestry Research 2020年第4期31卷 1399-1403页

作者： Sung-Chan Lee Hyo-Rim Lee Dong-soo Kim Jun-Hyeong kwon Min-Jung Huh il-kwon Park Department of Forest Sciences College of Agriculture and Life SciencesSeoul National UniversitySeoul 08826Republic of Korea Research Institute of Agriculture and Life Science College of Agriculture and Life SciencesSeoul National UniversitySeoul 08826Republic of Korea Forest Biomaterials Research Center National Institute of Forest ScienceJinjuGyeongnam 52817Republic of Korea

In this study,we investigated the preventive effects of emamectin benzoate 9.7%SL,which was newly developed to reduce the injection volume and number of injection holes required to protect against pine wood *** of the Pinus thunbergii trees injected with emamectin benzoate 9.7%SL at 0.3 mL/cm diameter at breast height(DBH)died within 2 years of inoculation with pine wood *** benzoate 9.7%SL injected at 0.6 mL/cm DBH resulted in no tree mortality for 3 *** residue of emamectin benzoate 9.7%SL in pine twigs injected with 0.3 mL/cm DBH was 0.490μg/g at 1 year after injection and 0.303μg/g after 2 *** residues values are greater than 0.031μg/g,previously determined IC95 value for emamectin benzoate against the pine wood *** field experiment and residue analysis showed that emamectin benzoate 9.7%SL could be a substitute agent for emamectin benzoate 2.15%EC,which is widely used to prevent pine wood nematode in the field and that injection volume and number of injection holes can be greatly educed using this new formulation,which will reduce injury to the cambium,interruption of water movement,and infection of inoculation wounds by wood-decay or blue stain fungi.

关键词： Emamectin benzoate 9.7%SL Emamectin benzoate 2.15%EC Trunk injection Pine wood nematode Residue

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Emotional inference by means of Choquet integral and λ-fuzzy measurement in consideration of ambiguity of human mentality

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Journal of Central South University 2016年第1期23卷 160-168页

作者： kwon il-kyoung LEE Sang-yong Division of Computer Science & Engineering Kongju National University Department of Computer Science & Engineering Kongju National University

Research on human emotions has started to address psychological aspects of human nature and has advanced to the point of designing various models that represent them quantitatively and systematically. Based on the findings, a method is suggested for emotional space formation and emotional inference that enhance the quality and maximize the reality of emotion-based personalized services. In consideration of the subjective tendencies of individuals, AHP was adopted for the quantitative evaluation of human emotions, based on which an emotional space remodeling method is suggested in reference to the emotional model of Thayer and Plutchik, which takes into account personal emotions. In addition, Sugeno fuzzy inference, fuzzy measures, and Choquet integral were adopted for emotional inference in the remodeled personalized emotional space model. Its performance was evaluated through an experiment. Fourteen cases were analyzed with 4.0 and higher evaluation value of emotions inferred, for the evaluation of emotional similarity, through the case studies of 17 kinds of emotional inference methods. Matching results per inference method in ten cases accounting for 71% are confirmed. It is also found that the remaining two cases are inferred as adjoining emotion in the same section. In this manner, the similarity of inference results is verified.

关键词： fuzzy measure fuzzy integral emotional model emotion space AHP fuzzy inference system Choquet integral

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Influence of tool plunge depth and welding distance on friction stir lap welding of AA5454-O aluminum alloy plates with different thicknesses

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中国有色金属学会会刊：英文版 2012年第S3期22卷 624-628页

作者： Jun-Won kwon Myoung-soo KANG Sung-Ook YOON Yong-Jai kwon Sung-Tae HONG Dae-il KIM Kwang-Hak LEE Jong-Dock SEO Jin-soo MOON Kyung-Sik HAN School of Materials Science and Engineering University of Ulsan School of Mechanical Engineering University of Ulsan Technical Research Laboratories Shin Young Co.Ltd. Automotive Parts Innovation Center Ulsan Technopark

AA5454-O aluminum alloy plates with thicknesses of 1.4 and 1.0 mm were friction-stir-lap-welded (FSLWed).The influences of the tool plunge depth and welding distance on surface appearance,macrostructure and mechanical properties of the FSLWed plates were experimentally *** tensile shear load of the FSLWed plates was compared with that of the adhesive-bonded ***-free FSLWed zones were successfully obtained in all the tool plunge depths and the welding *** FSLWed zones exhibited the relatively smooth surface *** all the FSLWed conditions,the FSLWed zone exhibited higher average hardness than the base *** addition,the upper plate exhibited a higher average hardness than the lower plate,although there was no special tendency in spite of the change in the tool plunge depth and the welding *** maximum tensile shear load of the FSLWed plates was much higher than that of the adhesive-bonded aluminum alloy ***,under the FSLW condition of the plunge depth of 1.8 mm and the welding distance of 40 mm,the tensile shear load of the FSLWed plate reached a level about 41% greater than that of the adhesive-bonded aluminum alloy *** addition,the maximum tensile shear load of the FSLWed plate was increased with the increase of the welding distance.

关键词： friction stir lap welding AA5450-O aluminum alloy tool plunge depth welding distance mechanical properties

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Enumerating Abelian Typical Cube-Free Fold Coverings of a Circulant Graph

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Algebra Colloquium 2020年第1期27卷 137-148页

作者： Young soo kwon Jaeun Lee Department of Mathematics Yeungnam UniversityKyongsan712-749Korea

Enumerating the isomorphism or equivalence classes of several types of graph coverings is one of the central research topics in enumerative topological graph theory.A covering projection p from a Cayley graph Cay(Г,X)onto another Cayley graph Cay(Q,y)is called typical if the function p:Г→Q on the vertex sets is a group epimorphism.A typical covering is called abelian(or circulant,respectively)if its covering graph is a Cayley graph on an abelism(or a cyclic,respectively)***,the equivalence classes of connected abelian typical prime-fold coverings of a circulant graph are *** a continuation of this work,we enumerate the equivalence classes of connected abelian typical cube-free fold coverings of a circulant graph.

关键词： graph covering enumeration voltage assignment circulant graph

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Velocity Profiles between Two Baffles in a Shell and Tube Heat Exchanger

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Journal of Thermal Science 2015年第4期24卷 356-363页

作者： Tae-Hyun Chang Chang-Hoan Lee Hae-soo Lee kwon-soo Lee Senior Research Fellow of RESEAT Korea Institute of Science and Technology Information Korea Institute of Science and Technology Information Postdoctoral Research Fellow School of Mechanical Engineering of Kyungnam University International University of Korea

Heat exchangers are extensively utilized for waste heat recovery,oil refining,chemical processing,and steam *** this study,velocity profiles are measured using a 3D particle image velocimetry(PIV)system between two baffles in a shell and tube heat exchanger for parallel and counter *** PIV and computational fluid dynamics results show the occurrence of some strong vectors near the *** vectors are assumed due to the clearance between the inner tubes and the front ***,the major parts of the vectors are moved out through the bottom opening of the rear baffle,and other vectors produce a large circle between the two *** simulations are conducted to investigate the effects of the baffle on the heat exchanger using the Fluent *** k-εturbulence model is employed to calculate the flows along the heat exchanger.

关键词： Baffle P1V Shell and tube heat exchanger Cut off ratio CFD

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Design of an Asymmetric Rotor Pole for Wound Field Synchronous Machines

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CES Transactions on Electrical Machines and Systems 2021年第4期5卷 321-327页

作者： Wenping Chai Byung-il kwon School of New Energy Harbin Institute of Technology at WeihaiWeihai 264209China Department of Electronic Engineering Hanyang UniversityAnsan15588South Korea

This study proposes a novel asymmetric rotor pole design for wound field synchronous machines(WFSMs),which can achieve high saliency ratio and also low torque *** key point is the optimal design of the asymmetric rotor pole with the inverse-cosine-shaped(ICS)plus reverse 3rd harmonic *** asymmetric rotor pole can help to improve the average output torque by enhancing the saliency *** reverse 3rd harmonic shaping on the rotor pole surface is mainly used to reduce the torque *** certify the effectivity of the proposed design,three-phase 54-slot/6-pole 4.7kW WFSMs with uniform air gap and with non-uniform air gap shaped by the ICS plus optimum reverse 3rd harmonic are utilized as the basic model and referenced model for *** the referenced model,the optimum amplitude of reverse 3rd harmonic is preferred as 1/***,all electromagnetic characteristics of the investigated machines are predicted by the finite-element method(FEM).The highest saliency ratio and comparatively low torque ripple have been verified.

关键词： Asymmetric rotor pole high saliency ratio low torque ripple wound field synchronous machine

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Probability mass first flush evaluation for combined sewer discharges

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Journal of Environmental Sciences 2010年第6期22卷 915-922页

作者： Inhyeok Park Hongmyeong Kim soo-kwon Chae Sungryong Ha Department of Urban Engineering Chungbuk National University Ecowiz Corporation Cheongju School of Human & Environmental Sciences Eulji University

The Korea government has put in a lot of effort to construct sanitation facilities for controlling non-point source pollution. The first flush phenomenon is a prime example of such pollution. However, to date, several serious problems have arisen in the operation and treatment effectiveness of these facilities due to unsuitable design flow volumes and pollution loads. It is difficult to assess the optimal flow volume and pollution mass when considering both monetary and temporal limitations. The objective of this article was to characterize the discharge of storm runoff pollution from urban catchments in Korea and to estimate the probability of mass first flush （MFFn） using the storm water management model and probability density functions. As a result of the review of gauged storms for the representative using probability density function with rainfall volumes during the last two years, all the gauged storms were found to be valid representative precipitation. Both the observed MFFn and probability MFFn in BE-1 denoted similarly large magnitudes of first flush with roughly 40% of the total pollution mass contained in the first 20% of the runoff. In the case of BE-2, however, there were significant difference between the observed MFFn and probability MFFn.

关键词： first flush combined sewer overflows (CSOs) probability mass first flush storm water management model best management practices

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Clinical implication of FDG uptake of bone marrow on PET/CT in gastric cancer patients with surgical resection

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World Journal of Gastroenterology 2017年第13期23卷 2385-2395页

作者： Jeong Won Lee Moon-soo Lee il kwon Chung Myoung Won Son Young Sin Cho Sang Mi Lee Department of Nuclear Medicine Institute of Integrative MedicineCatholic Kwandong University College of MedicineInternational St.Mary's Hospital Department of Surgery Soonchunhyang University Hospital Division of Gastroenterology Department of Internal MedicineSoonchunhyang University Hospital Department of Nuclear Medicine Soonchunhyang University Hospital

AIM To determine the relationship between F-18 fluorodeoxyglucose(FDG) uptake of bone marrow(BM) on positron emission tomography/computed tomography(PET/CT) and clinical factors and to assess the prognostic value of FDG uptake of BM in gastric *** We retrospectively enrolled 309 gastric cancer patients who underwent staging FDG PET/CT and curative surgical resection. FDG uptake of primary tumor was visually classified as positive or negative FDG uptake. Mean FDG uptake of BM(BM SUV) and BM-to-liver uptake ratio(BLR) were measured. The relationships of BM SUV or BLR with clinical factors were evaluated. The prognostic values of BM SUV, BLR, and other clinical factors for predicting recurrence-free survival(RFS) and overall survival(OS) were *** Of 309 patients, 38 patients(12.3%) experienced cancer recurrence and 18 patients(5.8%) died. Patients with advanced gastric cancer, positive FDG uptake, and recurrence had higher values of BM SUV and BLR than those with early gastric cancer, negative FDG uptake, and no recurrence(P il-to-lymphocyte ratio, and platelet-tolymphocyte ratio(P < 0.05). On multivariate analysis, multiple tumors, T stage, lymph node metastasis, tumor involvement of resection margin, and BLR were significantly associated with RFS(P < 0.05). T stage, lymph node metastasis, hemoglobin level, and BLR were significantly associated with OS(P < 0.05). CONCLUSION BLR on PET/CT was an independent prognostic factor for RFS and OS in gastric cancer patients with curative surgical resection.

关键词： F-18 fluorodeoxyglucose Positron emission tomography Prognosis Bone marrow Gastric cancer

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Material and mechanical factors:new strategy in cellular neurogenesis

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Neural Regeneration Research 2014年第20期9卷 1810-1813页

作者： Hillary Stoll il Keun kwon Jung Yul Lim Department of Biological Systems Engineering University of Nebraska-LincolnLincolnNEUSA The Graduate School of Dentistry Kyung Hee UniversitySeoulKorea Department of Mechanical and Materials Engineering University of Nebraska-LincolnLincolnNEUSA

Since damaged neural circuits are not generally self-recovered, developing methods to stimulate neurogenesis is critically required. Most studies have examined the effects of soluble pharma- cological factors on the cellular neurogenesis. On the other hand, it is now recognized that the other extracellular factors, including material and mechanical cues, also have a strong potential to induce cellular neurogenesis. This article will review recent data on the material （chemical patterning, micro/nano-topography, carbon nanotube, graphene） and mechanical （static cue from substrate stiffness, dynamic cue from stretch and flow shear） stimulations of cellular neuro- genesis. These approaches may provide new neural regenerative medicine protocols. Scaffolding material templates capable of triggering cellular neurogenesis can be explored in the presence of neurogenesis-stimulatory mechanical environments, and also with conventional soluble factors, to enhance axonal growth and neural network formation in neural tissue engineering.

关键词： neural regenerative medicine cellular neurogenesis material cue mechanical factor soluble signal

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