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Study on Approach for Computer-Aided Design and Machining of General Cylindrical Cam Using Relative Velocity and Inverse Kinematics

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厦门大学学报（自然科学版） 2002年第S1期41卷 205-页

作者： Se-Hwan park Byong-Kook Gu joong-Ho Shin Geun-Jong Yoo Department of Mechanical Design and Manufacturing Changwon National UniversityDepartment of Mechanical Design and Manufacturing Changwon National UniversityDepartment of Mechanical Design and Manufacturing Changwon National UniversityDepartment of Mechanical Design and Manufacturing Changwon National University Changwon South KoreaChangwon South KoreaChangwon South KoreaChangwon South Korea

Cylindrical Cam Mechanism which is one of the best eq uipments to accomplish an accurate motion transmission is widely used in the fie lds of industries, such as machine tool exchangers, textile machinery and automa tic transfer equipments. This paper proposes a new approach for the shape design and manufacturing of the cylindrical cam. The design approach uses the relative velocity concept and the manufacturing approach uses the inverse kinematics concept. For the shape desig n, the contact points between the cam and the follower roller are calculated bas ed on relative velocity of which the direction is on the common tangential line, and then the whole shape of cam is determined from transformation of the coordi nate system. For the manufacturing procedures, the location and the orientation of cutter path can be allocated corresponding to the designed shape data. The in tegral NC code for multi-axis CNC machining center is created using the inverse kinematics concept from the data of the location and the orientation of cutter path. As the advantages of the proposed approach, the machine tool is designed t o having an alternative size in fabricating the general cam, while the tool must be fitted to diameter size of the follower in the conventional approach. Finally, CAD/CAM program, "Cylindrical DAM", is developed on C++ lan guage. This program can perform shape design, manufacturing and kinematics simul ation, which can make integral NC code for multi-axis CNC machining center. The proposed method can be applied easily on fields of industries.

关键词： Cylindrical Cam Mechanism(CCM) shape design rel ative velocity method NC Code Multi-axis CNC machining center inverse kinema tics

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X-ray Spectra Calculations for Inspection of Semiconductors with Different Target/Filter Combinations Using MCNPX

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Journal of Physical Science and Application 2016年第4期6卷 8-12页

作者： Jeong-Ho Kim Hye-Min park Ki-Hyun park Chan-Jong park Seung-Ho Lee Dong-Sung Kim joong-Suk Youn Seing-Won Jeon Koan-Sik Joo Department of Physics University of Myongji Yongin KS009 Korea SEC111 Saneop-ro 155 beon-gil Gwonseon-gu Suwon KS002 Korea

X-rays are commonly used for inspecting semiconductors. However, excessive radiation dose could damage semiconductors. Therefore, unnecessary exposure needs to be reduced. The ray quality, which is influenced by the tube voltage and filter, determines the exposure. We designed an X-ray tube for inspecting semiconductors with different target/filter combinations and calculated X-ray spectra using the MCNPX （Monte Carlo n-particle extended） code. The target material was W, and the filters were made of Mo, W, and Zr. The W/W combination showed the lowest flux. The MCNPX code can reduce the development time and cost of the target/filter combination for inspecting semiconductors.

关键词： Inspection semiconductor damage filter MCNPX.

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A case of idiopathic colonic varices: A rare cause of hematochezia misconceived as tumor

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World Journal of Gastroenterology 2006年第16期12卷 2629-2632页

作者： Joung-Ho Han Won-joong Jeon Hee-Bok Chae Seon-Mee park Sei-Jin Youn Seok-Hyung Kim Il-Hun Bae Sang-Jeon Lee Department of Internal Medicine College of MedicineChungbuk National UniversityCheongjuRepublic of Korea Department of Pathology College of MedicineChungbuk National UniversityCheongjuRepublic of Korea Department of Radiology College of MedicineChungbuk National UniversityCheongjuRepublic of Korea Department of General Surgery College of MedicineChungbuk National UniversityCheongjuRepublic of Korea

Colonic varices are a very rare cause of lower gastrointestinal bleeding. Fewer than 100 cases of colonic varices, and 30 cases of idiopathic colonic varices （ICV） have been reported in the English literature. Among these 30 cases of ICV, 19 cases were diagnosed by angiography, and 7 operated cases were diagnosed later as ileocecal vein deficit, hemangioma, and idiopathic in 1, 1, 5 cases, respectively. We report the case of a 24-year-old man who suffered from multiple episodes of hematochezia of varying degree at the age of 11 years. He had severe anemia with hemoglobin of 21 g/L. On colonoscopy, tortuously dilated submucosal vein and friable ulceration covered with dark necrotic tissues especially at the rectosigmoid region were seen from the rectum up to the distal descending colon. It initially appeared to be carcinoma with varices. Mesenteric angiographic study suggested a colonic hemangioma. Low anterior resection was done due to medically intractable and recurrent hematochezia. Other bowel and mesenteric vascular structures appeared normal. Microscopic examination revealed normal colonic mucosa with dilated veins throughout the submucosa and serosa without representing new vessel growth. Taken all of these findings together, the patient was diagnosed as ICV. His postoperative course was uneventful.

关键词： Idiopathic colonic varices Hematochezia Colon cancer Hemangioma

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Endoscopic resection of sparganosis presenting as colon submucosal tumor: A case report

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World Journal of Gastroenterology 2016年第19期22卷 4776-4780页

作者： joong Keun Kim Dong hoon Baek Bong Eun Lee Gwang Ha Kim Geun Am Song Do Youn park Division of Gastroenterology Departments of Internal Medicine Pusan National University School of Medicine and Biomedical Research Institute Pusan National University Hospital Department of Pathology Pusan National University School of Medicine and Biomedical Research Institute Pusan National University Hospital

Human sparganosis is a rare parasitic disease caused by infection with the tapeworm Sparganum, the migrating plerocercoid(second stage) larva of Spirometra species. Sparganosis usually involves subcutaneous tissues and/or muscles of various parts of the body, but involvement of other sites such as the brain, eye, peritoneopleural cavity, urinary track, scrotum, and abdominal viscera has also been documented. Infections caused by sparganum have a worldwide distribution but are most common in Southeast Asia such as China, Japan, and South Korea. Rectal sparganosis is an uncommon disease but should be considered in the differential diagnosis of unusual and suspicious rectal submucosal tumors. We report a case of rectal sparganosis presenting as rectal submucosal tumor. We performed endoscopic submucosal dissection of the rectal submucosal tumor. The sparganosis was confirmed based on the presence of calcospherules in the submucosal layer on histological examination. Moreover, the result of the immunoglobulin G antibody test for sparganosis was positive but became negative after endoscopic submucosal dissection. Though rare, rectal sparganosis should be considered in the differential diagnosis of rectal submucosal tumor-like lesions. This case suggests that physicians should make effort to exclude sparganosis through careful diagnostic approaches, including detailed history taking and serological tests for parasites. In this report, we aimed to highlight the clinical presentation of Sparganum infection as a rectal submucosal tumor.

关键词： Rectum Submucosal tumor Sparganosis Sparganum Parasite disease

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Numerical simulation of ice-ring formation in the jointed rock mass around underground LNG storage cavern using thermo-hydraulic model

Numerical simulation of ice-ring formation in the jointed ro...

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Harmonising Rock Engineering and the Environment—12th ISRM International Congress on Rock Mechanics

作者： So-Keul Chung Eui-Seob park joong-Ho Synn Woo-Cheol Jeong Taek-Kon Kim Korea Institute of Geoscience and Mineral Resources DaejeonKorea

＜正＞Experience on the underground storage for the crude oil and various types of hydrocarbons proved to be an economical means for the storage of *** the knowledge from our past experience,attempts were made to develop the LNG underground storage system but were not successful due to its failure in controlling the temperature and groundwater without *** the past trials,it was observed that the thermal stress and freezing of groundwater nearby to the cavern generated cracks in the host rock ***,these thermal cracks contributed to induce gas leakage leading to the increase in heat flux exchange between the stored LNG

关键词： fluid flow ground freezing rock joints cryo-suction

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Krill oil ameliorates benign prostatic hyperplasia by regulating G-phase cell cycle arrest and altering signaling pathways and benign prostatic hyperplasia-associated markers

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Food Science and Human Wellness 2023年

作者： hoon Kim Jongyeob Kim Byungdoo Hwang Sang Yong park Ji-Yeon Shin Eun Byeol Go Jae Sil Kim Youngjin Roh Soon Chul Myung Seok-joong Yun Yung Hyun Choi Wun-Jae Kim Sung-Kwon Moon Department of Biochemistry， College of Oriental Medicine， Dongeui University Institute of Urotech， Cheongju Department of Urology， Chungbuk National University， Cheongju SD Biotechnologies， 66 Magojungang 8-ro 1-gil， Gangseo-gu Department of Food and Nutrition， Chung-Ang University Department of Urology， College of Medicine， Chung-Ang University

Krill oil (KO) exhibits various biological activities， such as anti-inflammatory and antitumor effects. However， the inhibitory effects of benign prostatic hyperplasia (BPH) in vitro and in vivo have not yet been studied. This study investigated the anti-BPH effects of KO extracted by an enzymatic hydrolysis method. KO treatment inhibited the proliferation of WMPY-1 and BPH-1 cells by induction of G0/G1phase arrest through the modulation of positive and negative regulators in both prostate cell types. KO treatment stimulated phosphorylation of JNK and p38 signaling. In addition， KO changed the expression of BPH-related markers (5α-reductase， androgen receptor， FGF， Bcl-2， and Bax) and the activity of the proliferation-mediated NF-κB binding motif. KO-induced levels of proliferation-mediated molecules of prostate cells were attenuated in the presence of siRNA-specific p-38 (si-p38) and JNK (si-JNK). Furthermore， the administration of KO alleviated prostate size and weight and the cell layer thickness of prostate glands in a testosterone enanthate-induced BPH rat model. KO treatment altered the level of dihydrotestosterone in serum and the expression levels of BPH-related markers in prostate tissues. Finally， KO-mediated inhibition of prostatic growth was validated by histological analysis. These results suggest that KO has an inhibitory effect on BPH in prostate cells in vitro and in vivo. Thus， KO might be a potential prophylactic or therapeutic agent for patients with BPH.

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Superior gallstone dissolubility and safety of tert-amyl ethyl ether over methyl-tertiary butyl ether

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World Journal of Gastroenterology 2019年第39期25卷 5936-5952页

作者： Dong Do You Suk Joon Cho Ok-Hee Kim Jin Sook Song Kyu-Seok Hwang Sang Chul Lee Kee-Hwan Kim Ho joong Choi Ha-Eun Hong Haeyeon Seo Tae Ho Hong Jung Hyun park Tae Yoon Lee Joseph Ahn Jae-Kyung Jung Kwan-Young Jung Say-June Kim Department of Surgery St.Vincent's HospitalCollege of MedicineThe Catholic University of KoreaSeoul 16247South Korea College of Pharmacy Chungbuk National UniversityCheongju 28644South Korea Department of Surgery Seoul St.Mary’s HospitalCollege of Medicinethe Catholic University of KoreaSeoul 06591South Korea Catholic Central Laboratory of Surgery Institute of Biomedical IndustryCollege of Medicinethe Catholic University of KoreaSeoul 06591South Korea Bio and Drug Discovery Division Korea Research Institute of Chemical TechnologyDaejeon 34114South Korea Department of Surgery Daejeon St.Mary's HospitalCollege of Medicinethe Catholic University of KoreaSeoul 34943South Korea Department of Surgery Uijeongbu St.Mary's HospitalCollege of Medicinethe Catholic University of KoreaSeoul 11765South Korea Department of Biomedicine and Health Science College of Medicinethe Catholic University of KoreaSeoul 06591South Korea Department of Surgery Eunpyeong St.Mary’s HospitalCollege of Medicinethe Catholic University of KoreaSeoul 03312South Korea Department of Medicinal Chemistry and Pharmacology University of Science and TechnologyDaejeon 34113South Korea

BACKGROUND The use of methyl-tertiary butyl ether(MTBE)to dissolve gallstones has been limited due to concerns over its toxicity and the widespread recognition of the safety of laparoscopic *** adverse effects of MTBE are largely attributed to its low boiling point,resulting in a tendency to ***,if there is a material with a higher boiling point and similar or higher dissolubility than MTBE,it is expected to be an attractive alternative to *** To determine whether tert-amyl ethyl ether(TAEE),an MTBE analogue with a relatively higher boiling point(102°C),could be used as an alternative to MTBE in terms of gallstone dissolubility and *** The in vitro dissolubility of MTBE and TAEE was determined by measuring the dry weights of human gallstones at predetermined time intervals after placing them in glass containers with either of the two *** in vivo dissolubility was determined by comparing the weights of solvent-treated gallstones and control(dimethyl sulfoxide)-treated gallstones,after the direct infusion of each solvent into the gallbladder in both hamster models with cholesterol and pigmented *** The in vitro results demonstrated a 24 h TAEE-dissolubility of 76.7%,56.5%and 38.75%for cholesterol,mixed,and pigmented gallstones,respectively,which represented a 1.2-,1.4-,and 1.3-fold increase in dissolubility compared to that of *** the in vitro experiment,the 24 h-dissolubility of TAEE was 71.7%and 63.0%for cholesterol and pigmented gallstones,respectively,which represented a 1.4-and 1.9-fold increase in dissolubility compared to that of *** addition,the results of the cell viability assay and western blot analysis indicated that TAEE had a lower toxicity towards gallbladder epithelial cells than *** We demonstrated that TAEE has higher gallstone dissolubility properties and safety than those of *** such,TAEE could present an attractive alternative to MTBE if our findings

关键词： Tert-amyl ethyl ether Gallstones Methyl-tert-butyl ether Contact litholytic agent

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Isolated pancreatic metastasis of hepatocellular carcinoma after curative resection

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World Journal of Gastrointestinal Oncology 2010年第4期2卷 209-212页

作者： Sang Myung Woo joong-Won park Sung-Sik Han Joon-Il Choi Woo Jin Lee Sang Jae park Eun Kyung Hong Chang-Min Kim Center for Liver Cancer National Cancer Center809 Madu 1-dongIlsandong-guGoyangGyeonggi 411-769South Korea

Hepatocellular carcinoma(HCC)is a highly malignant tumor and extrahepatic metastasis is not *** most common organ of HCC metastasis is lung,followed by bone and adrenal *** the best of our knowledge,isolated pancreatic metastasis of HCC that developed after curative resection has not been described *** report a case of solitary pancreatic metastasis of HCC,which was found 28 mo after left hemihepatectomy for *** lesion was successfully resected with the pancreas,and no other metastatic lesions have been found in follow-up.

关键词： Hepatocellular carcinoma Pancreas Metastasis

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Photonic crystal fibers, devices, and applications

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Frontiers of Optoelectronics 2013年第1期6卷 3-24页

作者： Wei JIN Jian JU Hoi Lut HO Yeuk Lai hoo Ailing ZHANG Department of Electrical Engineering The Hong Kong Polytechnic University Hong Kong China

This paper reviews different types of air-silica photonic crystal fibers (PCFs), discusses their novel properties, and reports recent advances in PCF components and sensors as well as techniques for splicing PCFs to s... 详细信息

关键词： photonic crystal fibers (PCFs) microstructured optical fibers hollow-core photonic bandgap fibers(HC PBFs) optical fiber devices optical fiber sensors Photonic crystal fibers Optical fiber devices Fiber optic sensors

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Adhesion Performances of SIS/SBS Based UV-Curable Pressure Sensitive Adhesives Using Thiol-ene Reaction

Adhesion Performances of SIS/SBS Based UV-Curable Pressure S...

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第三届世界粘接及相关现象大会暨北京粘接学会第十五届学术年会

作者： Dong-Hyuk Lim Hyun-Sung Do Young-Jun park Hyun-joong Kim Jung-Suk Bang Goan-Hee Yoon Lab.of Adhesion and Bio-Composites Major in Environmental Materials ScienceSeoul 151-921S.Korea Vixxol Co. Inc.AnsanKyonggidoS.Korea

Synthetic rubber based pressure-sensitive adhesives(PSAs) usually containing SIS or SBS block copolymer, tackifier,plasticizer,and other additives are now widely used on various *** these PSAs are physically crosslinked and can be applied without the use of solvent,they are thermally processable and environmentally friendly. However these PSAs cannot be used in high temperature applications and in applications where solvent and chemical resistance properties are *** developed the PSA adding UV curable system,such as thiol-ene system,to increase adhesion properties at elevated *** adhesion properties such as probe tack,peel strength,shear adhesion failure temperature(SAFT) were *** probe tack test was conducted with varying probe materials and coating thickness of *** the contact angle,the surface property of the cured PSAs was also observed.

关键词： UV curing hotmelt PSA photoinitiator photocrosslinker thiol-ene reaction

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