• Korean Chemical Engineering Research
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• 제56권3호
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• pp.361-369
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• 2018

A manufacturing method has been devised to prepare novel heterogeneous cation exchange membranes by mixing ethylene vinyl acetate (EVA) copolymers with a commercial cation exchange resin. Optimum material characteristics, mixture ratios and manufacturing conditions have been worked out for achieving favorable membrane performance. Ion exchange capacity, electrical resistance, water uptake, swelling ratio and tensile strength properties were measured. SEM analysis was used to monitor morphology. Effects of vinyl acetate (VA) content, melt index (MI) and ion exchange resin content on properties of heterogeneous cation exchange membranes have been discussed. An application test was carried out by mounting a selected membrane in a membrane capacitive deionization (MCDI) system to investigate its desalination capability. 0.92 meq/g of ion exchange capacity, $8.7{\Omega}.cm^2$ of electrical resistance, $40kgf/cm^2$ of tensile strength, 19% of swelling ratio, 42% of water uptake, and 56.4% salt removal rate were achieved at best. VA content plays a leading role on the extent of physical properties and performance; however, MI is important for having uniform distribution of resin grains and achieving better ionic conductivity. Overall, manufacturing cost has been suppressed to 5-10% of that of homogeneous ion exchange membranes.

• Archives of Plastic Surgery
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• 제44권2호
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• pp.101-108
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• 2017

Background Understanding the female breast fascial system is of paramount importance in breast surgery. Little was written about breast ligaments. Most articles refer to Cooper's work without further anatomical studies. Lately, a horizontal septum has been described conveying nerves and vessels to the nipple areola complex. Methods During the surgical dissection of the lower part of the breast, in supero-medial technique for breast reduction operations, a fascial septum between the lower two quadrants was detected. This fibrous septum was studied through anatomic dissection of breast tissues during routine breast reshaping procedures that was done on 30 female patients. Magnetic resonance imaging (MRI) was performed preoperatively in all cases and correlated with the intraoperative findings. In the other five cases, outside the clinical study, the imaging was done during routine investigation for breast swellings. Results A vertical septum was identified in the lower part of the breast, lying at the breast meridian between the two lower quadrants. It is a tough bi-laminated structure that extends from the middle of the infra-mammary crease caudally to nipple-areola complex cranially and from the pectoral fascia posteriorly to the overlying skin anteriorly. This was proved by MRI findings. Conclusions This study describes a new inferior vertical septum which separates the lower half of the breast into two definite anatomical compartments: medial and lateral.

• 해양환경안전학회지
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• 제8권2호
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• pp.71-78
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• 2002

For the first Maritime Accident Inquiry System in Korea, Central Marine Accidents Inquiry Committee were founded in Seoul and District Marine Accidents Inquiry Committee in Busan city In 1963 to determine the circumstances of the accidents and causes. At the present day, it was settled as Maritime Safety Tribunal tough several revision of the Law and regulations regarding the Maritime Accident Inquiry System. In Korea, there occurred about m cases of marine accident, and as a result, about 200 people were lost human lives in average per year. In accordance with the change of circumstances such as traffic increasing and being bigger in size, being faster in speed, etc., the causes of the marine accidents become complicated year by year. Accordingly, in this moment, it is meaningful that the introduction of the Research Official who assists the Judges probing the cases fair and square. In this Paper, with the consideration of the several kinds of Research Official System, such as the Research Official of the Korean Supreme Court, the Supreme Public Prosecutors' Office and the Constitutional Court, Japanese Supreme Court, Law Clerk in USA, etc., the selection, numbers, duty of the Research Official were studied. The results of the study are as follows; 1. The Research Official to be appointed among the person having long enough career as a Judge, Investigator engaged in the Maritime Safety Tribunal due to he sho띨d have capability to confirm perfectly logical judgement and to collect enough material for the conclusion of the causes of the case. The one who understands the foreign language is preferred for the study of the foreign cases; 2. It will be logical to post 3 joint Research Officials in Korea Maritime Safety Tribunal in Seoul after due consideration the cases treated a year; 3. It will be logical for the Research Official to perform the collection of material and inspection of the scene for the trial and inquiry of the cases, to attend the cases filed suit to the Supreme Court, to make commentarial papers regarding the judged cases, to collect statistics of marine accidents and to devise a reform measure through in-depth analysis of the accidents frequently occurred, to study for the improvement of the Maritime Accident Inquiry System;

• Archives of Reconstructive Microsurgery
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• 제23권2호
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• pp.70-75
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• 2014

Purpose: Soft-tissue reconstruction in the knee area requires thin, pliable, and tough skin. The range of motion of the knee also acts as a limitation in using only local flaps for coverage. The author has successfully used various perforator flaps for soft tissue reconstruction around the knee while preserving its functional and cosmetic characteristics. Materials and Methods: Out of the twenty patients assessed from April 2009 to March 2011, seven received anterolateral thigh perforator flaps, four received medial sural perforator island flaps, four received lateral supragenicular perforaor perforator flaps, and five received medial genicular artery flaps. The age of the patients ranged from 44 to 79 and the size of the defects ranged from $4{\times}5cm$ to $17{\times}11cm$. Fifteen of the twenty patients had histories of total knee replacement (TKR) surgery. Results: There were no flap losses in any of the twenty patients assessed. Two patients showed partial losses in the distal area of the flap, but were treated through careful wound care. One patient presented with pedicle adhesion at the drainage site from a past TKR, but it did not hinder the flap survival. Primary closure at the donor site was possible in nine patients, while split skin graft was necessary for the other 13. Conclusion: In soft tissue reconstruction of the knee, various perforator flaps can be used depending on the condition of the preoperation scar, wound site, and size. It also proved to provide better functional and cosmetic results than in primary wound closure or skin grafts.

• 한국의류학회지
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• 제34권2호
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• pp.336-344
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• 2010

Stage costumes are characterized by the importance as a medium of total visual expression on a synthetic art and need to be designed more effectively. This study followed the stage costumes of the play 'Long long time ago whuo-ee whuoee' which participated in the China-Japan-Korea University Theatre Festival. By consisting of the framework of a Korean story that tells and expands the visual expression province by the access method of a producer, the unique costume in the play was created by the dyeing of the traditional hangi. First, the use of hanji in theater represents originality and a fresh variation with the formative beauty of stage costumes in accordance with hanji that conforms to the recreation of tradition. Second, the dip dyeing technique made it possible to express colors limitlessly and the airbrush dyeing technique along with dyeing twice could account for the weak points of the color. As a result, the color brought effect as expected. Third, the weak points were supported by a Jumchi technique that created the fibroid material tangled with stronger adhesion in the creation of a hangi costume. In addition, dyed hangi was attached to the outer fabric. It allowed the costume to have a unique texture that was both soft and tough. This enforced the visualization of the costume and durability to prevent possible damage by the performers. Forth, pieces of hanji were attached to the damaged parts of the costume after re-visiting the dress rehearsal. As a result, the stage costumes represented the shabby clothes that express the social class of the characters. A new understanding of the excellence of traditional hanji was found and confirmed the possibility of it as a material for stage costumes through the study.

• 한국식품과학회지
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• 제11권2호
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• pp.126-130
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• 1979

향신료 중(中) 식초와 생강의 생선 비린내 억제효과에 관하여 관능검사를 실시하였으며, gas chromatography에 의해 TMA량(量)을 측정하였다 그 결과(結果)는 다음과 같다. 1 관능검사의 결과, 식초 첨가량이 증가할수록 생선 비린내는 점점 감소되었으나, 고등어 100g당(當) 식초를 16m1이상 첨가했을 때는 신맛이 강하게 느껴졌으며 Texture가 단단해져서 질(質)이 저하되었다. 고등어 100g당(當) 식초 6ml를 첨가한 것은 비린내를 싫어하는 사람에 있어서 좋은 점수를 보여 주었다. 2. 고등어 100g 중(中)에는 $0.4{\sim}0.7{\;}mg$의 TMA이 함유되어 있었다. 3. gas chromatography로 분석해 본 결과(結果), 식초 첨가량이 증가할수록 TMA량(量)은 감소되는 경향이 보여졌다. 4. 생강의 phenolic fraction과 TMA과를 4시간(時間) 동안 반응시켰을 때 TMA량(量)은 67.5%로 감소되었다.

• 한국콘텐츠학회논문지
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• 제17권9호
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• pp.375-384
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• 2017

본 연구의 목적은 국내외 뮤지컬관련학과의 교육과정을 비교분석하고 이를 토대로 우리나라 교육과정의 문제점과 보완점이 무엇인지 제시하는데 있다. 이에 본 연구에서는 국내외의 교과과정의 차이를 비교하기기 위하여 4년제와 2~3년제 국내 대학의 뮤지컬관련학과와 국외로는 미국의 뮤지컬관련 학교 5개교, 프랑스 5개교를 선정하여 무용교육과정 수업실태를 연구하였다. 그 결과 우리나라의 뮤지컬 발전을 위해서는 교육과정의 개편이 필요하다는 결론을 도출 할 수 있었다. 첫째, 뮤지컬 현장에 맞는 체계적인 무용교육과정이 필요하다. 둘째, 다양화된 뮤지컬의 표현에 맞는 무용테크닉 수업을 강화해야 한다. 셋째, 특성화된 뮤지컬무용교과 교수법이 필요하다. 무엇보다 현장과 연계된 효율적인 교육방안이 필요하다. 뮤지컬을 공부하는 학생들은 연기, 노래, 무용을 동시에 수행해야하는 어려움에 직면해 있다. 이들 중 한 분야를 습득하기에도 어려운 것이 현실이다. 누구도 흉내 낼 수 없는 독창적인 한국스타일의 뮤지컬이라는 숙제를 해결하기 위해 대학에서의 체계적인 교육과정이 매우 중요하다.

• Composites Research
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• 제19권2호
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• pp.20-27
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• 2006

부직포를 이용한 하이브리드 복합재료는 일반적인 섬유강화 적층복합재료의 기계적 특성을 개선하기 위하여 개발되었다. 부직포 하이브리드 프리프레그는 전형적 FRP 프리프레그와 부직포 프리프레그로 이루어전 있다. 부직포 프리프레그는 부직포와 수지의 조합에 의해 만들어진다. 부직포는 단섬유가 평면상에 불규칙적으로 분산되어 배치된 형상이다. 부직포를 이용한 하이브리드 프리프레그의 개발목적은 (i) 적층간의 층간특성(층간파괴인성 및 층간강도)을 향상시키고, (ii) 저비용으로 재료의 기계적 강도에 대한 신뢰성을 개선하며, (iii) 복합적층판에서 강화가 요구되는 층에 인성과 강도를 부여함에 있다. 상기의 목적을 달성하기 위하여 부직포층의 기포를 감소시키기 위한 제조기술을 제안하였다. 그 결과, 부직포를 이용한 하이브리드 개념을 도입함으로써 복합적층판의 층간파손특성이 크게 개선되었다.

• 한국컴퓨터정보학회논문지
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• 제14권2호
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• pp.211-219
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• 2009

우리나라의 자원부족 및 치열한 가격경쟁 등으로 기업들은 물류환경은 매우 어려운 상황에 직면해 있다. 이와 같은 물류비 부담이 무한경쟁시대에 국가 경쟁력이나 기업경쟁력에서 걸림돌이 되고 있음은 자명하다. 이와 관련된 기존 연구들은 대규모 분배네트를 정의된 기호를 활용하여 하나의 통일된 수식으로 표현함으로써 분배 네트워크에 대한 시스템적 접근을 가능케 했으나, 물적 분배시스템에서 재고정책운영을 전통적 방법으로 한정하여 현실적 적용에 많은 문제점을 않고 있다. 본 연구에서는 효율적인 부재고의 처리를 위한 분배시스템의 비용분석 및 모형을 개발하여 현실적 적용을 가능케 했으며, 물적 분배시스템과 관련된 운영비용을 감소시킬 것이다.

• Animal Bioscience
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• 제37권5호
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• pp.908-917
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• 2024

Objective: Although pork loins is not a tough meat, they need to develop meat products with a soft texture for the elderly. This study focused on the physicochemical properties and tenderness characteristics of pork loin injected with green kiwifruit juice (GRJ) and gold kiwifruit juice (GOJ) during various incubation times. In addition, the antioxidant activities of hydrolysate derived from the hydrolysis of pork loin by kiwifruit juice protease were evaluated. Methods: The pork loin was injected with 10% and 20% GRJ and GOJ, under various incubation times (0, 4, 8, and 24 h). Then, the physicochemical properties and tenderness of pork loins were measured. 2,2- diphenyl-1-picrylhydrazyl radical scavenging activity and reducing power were conducted to determine hydrolysate's antioxidant activities derived from pork loin's hydrolysis by kiwifruit juice protease. Results: GRJ had greater tenderizing ability than GOJ, even at the 10% addition. When kiwifruit juice was injected into pork loin, the tenderness increased with increasing incubation time. This was confirmed by the decrease in intensity of the myosin heavy chain (MHC) band in sodium dodecyl sulfate-polyacrylamide gel electrophoresis. In particular, the MHC band decreased at 8 h for both 10% GRJ and 20% GOJ and at 4 h for 20% GRJ alone. The highest myofibril fragmentation index and peptide solubility were observed in pork loin treated with 20% GRJ compared to the other treatments during incubation. The 10% GRJ and 20% GOJ treatments showed similar levels of antioxidant activity of the protein hydrolysates in pork loin, and 20% GRJ showed the highest activity among the treatments. Conclusion: Kiwifruit juice had protease activity, and GRJ was more useful for tenderizing meat products than GOJ. Thus, GRJ at 10% could be a potential agent to tenderize and enrich the natural antioxidant activity through the proteolysis of pork loin.