• Title/Summary/Keyword: foreign material

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Fatigue Tests of Welded Joints and Comparison Study of Foreign Codes (용접부의 피로강도 시험평가 및 해외규격과의 비교연구)

  • Goo, Byeong-Choon;Kim, Jai-Hoon
    • Journal of Welding and Joining
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    • v.25 no.1
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    • pp.14-23
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    • 2007
  • A lot of fatigue tests on a material, JIS SM490A, with yielding strength of about 350 MPa and tensile strength of about 520 MPa were carried out. Various butt-welded specimens such as reinforcement removed, as-welded and weld toe ground, several types of fillet-welded specimens and full-size box type components were used. After having obtained S-N curves for the above- mentioned specimens, fatigue strengths were compared to those of foreign design codes, AWS, BS 7608 and ENV. It was found the fatigue strengths at low cycles are not in a good agreement with the foreign codes, but the fatigue limits are in a good agreement.

Successful removal of a foreign body by endoscopic balloon dilatation at the colonic stricture

  • Im, Chang Jo;Na, Ji Hoon;Kim, Hyun Sik;Ha, Sung Sam;Lim, Yoo Li;Lee, Ji Hyeon;Choi, Hee Kyoung;Kim, Hee Man
    • Journal of Yeungnam Medical Science
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    • v.33 no.1
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    • pp.29-32
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    • 2016
  • Most ingested foreign bodies pass readily throughout intestinal tract if they reach the stomach. In some cases, foreign bodies may be impacted behind a luminal constriction but are rare in colon. Here, we report the case of a 59-year-old man who did laparoscopic anterior resection due to sigmoid colon cancer 2 years ago and ischemic colitis was repeated on the anastomosis site. He initially presented with symptoms of abdominal pain 3 months before and melena 1 day before admission. Abdomen computerized tomography showed a 3.2 cm segment of luminal narrowing of the proximal colon involving upstream foreign material stasis. Sigmoidoscopic approaches revealed near complete obstruction on the anal verge of 20 cm and scope passing failed. Balloon dilatations were done on the obstruction site four times all and a foreign body impacted above the obstruction site was removed by an alligator without any complications. The foreign body removed looks like plastic or a shell, about 20 mm in size.

Diagnostic Imaging of Esophageal Diseases in Dogs (개에서 식도질환의 진단영상학적 평가)

  • 장동우;이영원;엄기동;최민철;윤정희
    • Journal of Veterinary Clinics
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    • v.18 no.3
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    • pp.269-272
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    • 2001
  • Fourteen dogs referred to veterinary Medical Teaching Hospital, Seoul National University were diagnosed as esophageal foreign body (9 cases), megaesophagus (4 cases) and esophageal stricture (1 case). Patients showed a variety of clinical signs including regurgitation, vomiting, anorexia, hypersalivation, and retching. Survey radiographic examination included the entire esophagus, including the caudal pharynx and cranial abdomen. contrast radiographs were done to identify lesions or to characterize abnormal radiographic findings on survey films. In case static contrast studies were not sufficient were not sufficient to differentiate the diseases, dynamic fluoroscopic studies were performed. In thoracic megaesophagus, when gas filled, it provided several hallmark findings such as visualization of paired longus colli muscle and tracheal stripe sign. When gas-distended, the caudal thoracic esophagus was seen as a pair of thin, soft-tissue stripes that converged into a point overlying the diaphragm and cranial abdomen. All cases of megaesophagus could be solely identified by survey radiographs. In esophageal foreign body, 6 cases out of 9 patients had the history of having foreign body and others not. Most of esophageal foreign body could be diagnosed on survey radiographs and one case with radiolucent foreign body was confirmed by esophagram. It appeared as radiopaque material along the path of esophagus and the radiopacity was determined by its nature. Obstruction caused by foreign body eventually led to dilation of the esophageal lumen cranial to the site in 3 cases. In esophageal stricture, there was no remarkable findings on survey radiograph of the thorax. However, esophagography with barium sulfate showed the narrowing of the esophagus near hiatus. On fluoroscopy, swallowed barium was stagnated cranial to the site despite the esophageal peristalsis.

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A Study on the Characteristics of Material in the Foreign Up-cycling Fashion Brands (Part II) -Fashion Bag Making Using Up-cycling Fashion Brand Material- (업사이클링 패션브랜드에 나타난 소재특성 연구 (제2보) -업사이클링 소재를 이용한 패션가방 제작-)

  • Lee, Dahye;Jung, Kyunghee;Bae, Soojeong
    • Journal of the Korean Society of Clothing and Textiles
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    • v.43 no.1
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    • pp.95-111
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    • 2019
  • This study is the 2nd report following "A Study on the Characteristics of Material in the Korean Up-cycling Fashion Brands (Part I)" that handled the development of upcycling props using the characteristics of upcycling material. The 2nd report analyzed product types and materials focusing on 21 foreign upcycling fashion brands. It analyzed the characteristics of upcycling fashion materials using the case analysis of coffee bean bag and waste denim based on external characteristics and internal characteristics. We then classified the external characteristics into environment/economic feasibility and availability/mixture and the internal characteristics into historicality/story and originality/scarcity. Five bags were designed and produced for the actual commercialization of fashion products based on such characteristics of materials, with the use of coffee bean bags and waste denim as upcycling materials. This study is differentiated from existing research by its suggestions for the utilization of fashion product upcycling coffee bean bags and waste denim. Also, upcycling fashion products could be competitive products in eco-friendliness and originality that can be a driving force for the sustainable development of fashion industry through the differentiation of existing fashion products.

Retroperitoneal Suppurative Fistula Caused by Remnant Suture Material in a Poodle Dog

  • Kim, Keunyung;Lee, Chaeyeong;Kim, Minyeon;Choi, Hyeonjong;Hong, Jeongho;Kim, Hyoyeon;Park, Hyojin;Kim, Na-hyun;Lee, Dongbin;Lee, Jae-Hoon
    • Journal of Veterinary Clinics
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    • v.38 no.6
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    • pp.285-289
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    • 2021
  • An eight-year-old, 3.4 kg, spayed female poodle dog was referred to Gyeongsang National University Animal Medical Center with obstinate bilateral retroperitoneal subcutaneous abscess. The medical history revealed ovariohysterectomy (OHE), lipoma, and mammary gland tumor excision performed two years ago. The dog presented with left retroperitoneal subcutaneous abscess discharge five months back and was treated by abscess drainage and antibiotics in a local veterinary hospital, but a relapse was reported on discontinuing antibiotics. On physical examination, the dog was febrile (40℃) and both retroperitoneal masses showed typical inflammatory reaction and purulent discharge. On serum chemistry analysis, hyperproteinemia, hyperglobulinemia, and elevated levels of C-reactive protein were observed. Cytologic examination showed degenerative neutrophils and phagocytic macrophages. Radiological examination revealed encapsulated hypoechoic subcutaneous masses in bilateral abdominal flank and the left flank mass was connected with the caudal pole of left kidney through fistula. Based on the diagnostic examination, exploratory celiotomy was recommended and left nephrectomy, and resection of bilateral masses were performed. During procedure, fistula between caudal pole of left kidney and left subcutaneous abscess was detected and suture material was identified. Resected tissue was histologically examined and diagnosed as suppurative abscess caused by the suture material. This case report describes chronic suppurative foreign body reaction including caudal pole of left kidney and bilateral retroperitoneal subcutaneous masses induced by the suture material used in OHE two years ago and the necessity of computed tomography examination to identify character of mass and extent of surgical resection.

Development of 600-MHz 19F-7Li Solid-State NMR Probe for In-Situ Analysis of Lithium Ion Batteries

  • Jeong, Ji-Ho;Park, Yu-Geun;Choi, Sung-Sub;Kim, Yongae
    • Bulletin of the Korean Chemical Society
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    • v.34 no.11
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    • pp.3253-3256
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    • 2013
  • Lithium is a highly attractive material for high-energy-concentration batteries, since it has low weight and high potential. Rechargeable lithium-ion batteries (LIBs), which have the extremely high gravimetric and volumetric energy densities, are currently the most preferable power sources for future electric vehicles and various portable electronic devices. In order to improve the efficiency and lifetime, new electrode compounds for lithium intercalation or insertion have been investigated for rechargeable batteries. Solid-state nuclear magnetic resonance (NMR) is a very useful tool to investigate the structural changes in electrode materials in actual working lithium-ion batteries. To detect the in-situ microstructural changes of electrode and electrolyte materials, $^7Li-^{19}F$ double-resonance solid-state NMR probe with a static solenoidal coil for a 600-MHz narrow-bore magnet was designed, constructed, and tested successfully.

Preparation of Micro-/Macroporous Carbons and Their Gas Sorption Properties

  • Hwang, Yong-Kyung;Shin, Hye-Seon;Hong, Jin-Yeon;Huh, Seong
    • Bulletin of the Korean Chemical Society
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    • v.35 no.2
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    • pp.377-382
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    • 2014
  • Micro-/macroporous carbons (MMCs) were prepared using a hollow mesoporous silica capsule (HMSC) as a sacrificial hard template. The carbonization process after the infiltration of furfuryl alcohol into the template-free HMSC material afforded MMC materials in high yield. The hard template HMSC could be removed by HF etching without deteriorating the structure of MMC. The MMC materials were fully characterized by SEM, TEM, PXRD, XPS, and Raman spectroscopy. The replication processes were so successful that MMCs exhibited a hollow capsular structure with multimodal microporosity. Detailed textural properties of MMC materials were investigated by volumetric $N_2$ adsorption-desorption analysis at 77 K. To explore the gas sorption abilities of MMCs for other gases, $H_2$ and $CO_2$ sorption analyses were also performed at various temperatures. The multimodal MMC materials were found to be good sorbents for both $H_2$ and $CO_2$ at low pressure.

A Study on the Costumes in the Dong A II Bo - $1920{\sim}1945$ - (동아일보(東亞日報)에 나타난 복식연구(服飾硏究))

  • Son, Myong-Im;Kim, Jin-Goo
    • Journal of the Korean Society of Costume
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    • v.14
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    • pp.145-165
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    • 1990
  • This study examine closely conditions of costume between the Modernized period and Liberation with newspaper materials. Because newspaper generally appear society conditions in those days on rapid and across-the boad basis. The Modernized period is extremely change among history of costum (ordinance prohibiting top knots, allowance of foreign clothes putting on). Because this change have been spontaneously not by internal desired but Western input by the strong nation of imperialism to enclose Chosun, they was accepted by the general public later under the rule of Japaneses Imperialism. Consequently, study of costume play an important part periods between the Japanese annexation of Korea and Liberation. This study apply to newspaper characteric for costume, and closely examine an important costum condition of those days next time, and present costume material in those days that composed the account catalog appeared periods between the first publication(1920) of the Dong A II Bo, and in the year 1945, it is as follows. 1. Foreign clothes of men generally accept the general public on look at from form change, in the 1920's had come short Jackets and narrow throusers into fashion, in the 1930's had come trousers of generous waist band with broads shoulder and long Jackets. Catalog of Major clothes is as follows; Spring coat, Jacket, Vest, Shirt, etc. While pants had come trousers into fashion 2. Functional characteric of Foreign clothes was the possible acceptance of women's foreign clothes. It relate with much discussion to improve Korean development in those days and substitute foreign clothes for Korean clothes because of institence in those days to improve functional clothes life. 3. An improvement women's Korean clothes generally take aim at women's nipple liberation, substitute vest waist for skirt waist, appear seamless one-piece skirt of shade length, and long dress length of Jacket. 4. Children's clothes give an account of functional and sanitary conditions, handling method, washing method. 5. Clothes materials give account of foreign clothes material, artificial silk, furs, cotton fabrics, and etc. 6. Clothes management give an account of washing, keeping method, washing method of foreign clothes, and keeping of furs. 7. The hair generaly had come short hair into fashion in men's case, while accounts on long hair fashion of foreign nation effect in case of women. 8. Describing on beauty care manage primary beauty care, reform, plastic operation, and shade beauty care. Ideal beauty care deal with natural and dignified buauty care. 9. Accesaries (hat, handbag, handkerchief, gloves) change with fashion of clothes, it rapid more than clothes fashion. 10. On encouragement of abolition of white clothes and putting on dyeing clothes, because of economic defect of white clothes, psychology and beauty consequently, white clothes is on the rise abolition. In national level almost substitute dyeing clothes for control and improvement of people of all social standings consequently, dress and its ornaments conditions in those days analyzed account of Dong-A II Bo accept the foreign clothes that introduced internal country of the whole century, and substitute dyeing for white clothes. Costume condition in those days appear the mixed conditions of Korean clothes and Foreign clothes. In the 1920's is the first consideration dress and its ornaments form of Korean clothes. As later goes on foreign is given much weight in the whole clothes life. Account of foreign clothes managemental ways appear in the 1920's, while those facts prove the point that appeared the account that always dealed with concrete content of foreign fashion in the 1930's.

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Analysis on Current Printing Industry in Russia (러시아 인쇄 산업 현황 분석 연구)

  • 김병현;신광철
    • Journal of the Korean Graphic Arts Communication Society
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    • v.20 no.1
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    • pp.1-15
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    • 2002
  • The objective of this study was carried out to investigate the study of printing presses and material industry for foreign countries market development(The point of Russia market) by examine the status of printing industry in domestic and russian. The results obtained from this study were the development and insurance of technical in printing industry market seemed to have secure a technical area in 21th century owing to have a exercise influence over about itself and material industry area.

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Psophometeric Noise Voltage of Telecommunication Lines and Test methods (통신회선의 잡음전압 기준 및 측정법)

  • Hwang, Jong-Sun;Kim, Yeong-Min;Lee, Kyoung-Wook;Kim, Jae-Joon
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.11b
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    • pp.617-620
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    • 2001
  • The protection of communication lines against harmful effects from electricity lines is very important with the rapid development of communications network. This paper is introduced the reference of noise voltage and the test methods of foreign countries. Further we will also present study measurement equipment for telecommunications noise voltage and circuit noise phenomenon.

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