• Korean Journal of Fisheries and Aquatic Sciences
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• v.11 no.1
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• pp.39-48
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• 1978

1) The decrease in strength of Raschel twines at Raschel joints is regarded to be due mainly to the frictional force between yarns and the unbalanced tensile distribution by the deformation of the joints. The rate of the decrease is about $13\%$ in lengthwise pull and 22 to $26\%$ in breadthwise pull. 2) The 3-course joint is less in deformation and stronger than the 2-course joint in all cases of pulls. 3) The variation of Raschel joint strength $T_R$ with the angle $\varphi$ between the adjacent bars is expressed as $T_R=T_{R0}-k\varphi$ where $T_{R0}$ is the strength at $\varphi=0^{\circ}$ and K is a constant. 4) The tensile strength ${\sigma}R$ and tile breaking energy $E_R$ of Raschel netting are given by $${\sigma}R=KN\;or\;${\sigma}R=T_RN$$ and $$E_R=AN$$ respectively, where N is the number of meshes at the pulling side, and K and A are constants. But the breaking energy of the netting is almost constant independent of tile variation of N. 5) The Raschel netting with some bars cut already breaks from tile joints of the bars next to the cut bars and its tensile strength, breaking energy, and breaking elongation decrease largily even if only one bar is in already cut state. 6) The tearing strength of Raschel netting is almost equal to the tensile strength of its single joint pulled by two bars. 7) The twisted joint is much more excellent in strength than the knot or the Raschel joint. The knot strength is 69 to $76\%$, and the Raschel joint strength is 71 to $74\%$ in lengthwise pull and 62 to $67\%$ in breadthwise pull, respectively, of the twisted joint strength.

• Food Science and Preservation
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• v.15 no.3
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• pp.450-455
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• 2008

Previously, we have shown that green tea extract lowers the intestinal absorption of cholesterol, fat, and other fat-soluble compounds. We conducted this study to determine whether green tea extract affects the rate of $^{14}C$-oleic acid esterification into various lipids in the intestinal mucosa of rats. Male Sprague-Dawley ruts were had free access to a nutritionally adequate AIN-93G diet and deionized water. Initially, the rat's mucosal content of total lipids was measured following 1 mL olive oil administration with (green tea group) or without (control group) 100 mg green tea extract powder. At 1 h and 5 h, intestinal segments were extracted for total lipid analysis. Secondly, to measure mucosal esterification rates of lipids, an abdominal incision was made along the midline, and a 10-cm long jejunal segment of the small intestine was ligated in situ. Then, micellar solutions with or without green tea extract were injected into the ligated jejunal segments and incubated for 10 mill. The micellar solution contained $200.0\;{\mu}$ Ci $^{14}C$-oleic acid, $200.1\;{\mu}mol$ unlabelled oleic acid, $66.7\;{\mu}mol$ 2-monooleoylglycerol, $66.7\;{\mu}mol$ palmitoyl-sn-glycero-3-phosphocholine, 2.2 mmol glucose, $50.0\;{\mu}mol$ albumin, and 16.5 mmol Na-taurocholate per L of phosphate buffered saline (pH, 6.3) with or without 8.87 g green tea extract powder. At 10 min, each rat was sacrificed by cervical dislocation under anesthesia and the segment was removed for lipid analysis. Significant differences were observed in mucosal triglyceride content at 1 h and 5 h in ruts given green tea extract. Significant differences in the rate of $^{14}C$-oleic acid esterification into triglycerides and phospholipids fractions were observed between control and green tea groups. However, There were no significant differences in other lipid fractions. These results indicate that the lowered esterification rates of $^{14}C$-oleic acid into triglycerides and phospholipids fractions is attributable to presence of green tea extract. This may be associated with an inhibitory effect of green tea catechin on the mucosal processes of lipids, leading to the inhibition of intestinal absorption of lipids.

• The Korean Journal of Ecology
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• v.15 no.4
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• pp.377-386
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• 1992

Seasonal changes of symbiotic nitrogen-fixation activity and growth characteristics of four different natural populations of kummerowia striata were quantitatively analyzed during the growing period. the nitrogen-fixation activity of root nodules attained the maximum rates of 148, 132, 102 and 100$\muM\;C_2H_4\;\cdot\;g\;fw\;nodule^{-1}\;\cdot\;hr^{-1}$, respectively for sunny, multibranched, shade and unibranched populations at the optimum growth conditions. and the seasonal changes showed fluctuations by environmental conditions such as light, temperature, nutrient contents, water stress and plant ages, etc. The multibranched plant showed the greater amount of leaf and root nodule biomass, and the higher nitrogenase activity than the unibranched plant. the optimum conditions of leaf chloropht11 and water content of each organ indicated the active growth and the maximum fresh biomass of 4 different populations were 1.92, 1.85, 0.97 and 0.56 g $fw\cdotplant^{-1}$ for shade multibranched, sunny and unibranched populations, respectively.

• Journal of Environmental Science International
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• v.7 no.4
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• pp.167-472
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• 1998

The washout on Incision cliff is a serious problem. Incision cliff if not carefully done, can contribute to soil erosion md, by removing covering plants could have a large impact on the temporary of normally the quality of water Because the washout of soil is influenced by its surface, it is necessary to prevent or diminish soul particle by plantation of grass species. Kumerowia stipujacea Is an useful species that diminish the injury of soil and rainwater We study that estimates of preventing soul erosion and river over-flow can be obtained from the experimental model developmented by several equators. Many potential contaminants are removed by filtration as the water moves slowly through the fields of K. supulacea.

• Proceedings of the Korea Society of Costume Conference
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• 2003.05a
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• pp.49-49
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• 2003

단령은 둥근 깃이라는 뜻으로 군신(君臣)이 착용한 관복명의 의미를 가지고 있다. 단령은 검박(儉朴)하고 활동적인 옷의 형태로 AD 1세기 경 서아시아 일대의 기마 유목민족에게 발생되었고 중국에서는 호복(胡服)이라고 불렀으며 4 세기 초부터 17세기까지 군신(君臣)의 관복으로부터 일반인의 생활복에 이르기까지 여러 계층에서 착용되었다. 우리나라에서는 신라 28대 진덕여왕 2년(AD 648년)에 김춘추가 당(唐)나라 태종에게 단령을 하사 받음으로 착용하기 시작하였고 고려시대 조선시대에는 주로 관복(官服)으로 계속 착용하였고 현재에는 혼례 예복으로 착용하고 있다. 이와 같이 오랜 기간 동안 착용되어 온 단령은 봉재와 구성면에서 깃의 너비나 형태 앞 뒤 길이 차이 소매의 너비무의 변화 등 구성과 여러가지 면에서 변화를 거쳐 왔다. 단령의 구조는 깃이 둥근 형태에 옆 목점에서 매듭단추나 끈으로 여미며 길이가 길다. 따라서 15-16세기의 전단후장형 단령과 현재 혼례시 신랑 예복으로 착용되는 후기의 단령을 비교하여 구성의 차이점을 알아보도록 한다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.31-32
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• 2000

장어 통발 어업은 모릿줄에 약 팔천개의 통발을 일정간격마다 아릿줄로 묶어 해저에 투승한 후, 일정시간이 경과하면 양승하여 통발속에 들어 있는 어류를 어획하는 어업이다. 이 어업의 조업과정 중에서 가장 힘들고 위험한 것은 통발 양승작업시 모릿줄에 일정간격마다 변형된 참 매듭으로 묶여있는 약 팔천개의 통발을 분리시키는 공정이다. 이 공정에는 최소 2명 이상의 숙련된 선원이 반드시 필요하며,$^{(1)}$ 현재 숙련된 선원 구인난에 직면하고 있다. 이러한 문제를 해결하기 위해서는 통발 양승작업시 모릿줄에 연결되어 있는 통발을 자동으로 분리할 수 있는 기계장치의 개발이 필요하다. 이와 관련한 종래의 연구로서는 타원형 후크와 나팔관식 자동분리기와$^{(2)}$ 통발 자동 분리기$^{(3)}$ 등이 있으나, 현재 실용화되지는 못하였다. (중략)

• Clinics in Shoulder and Elbow
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• v.8 no.2
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• pp.117-121
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• 2005

A secure slip knot is very important in the arthroscopic surgery of the shoulder joint. The new 'Hallym Slider', developed by the first author(KCN), has the properties of being a simple sliding and one-way locking knot. This technique can be performed alone without an assistant and has no accidental premature locking during the knot tying. The initial slip knot determines the adequacy of tissue approximation and consequent healing. The 'Hallym Slider' has excellent initial holding capacity, maintaining tension on soft tissue while additional half-hitches are being tied. It locks readily, it takes less time to tie than numerous square knots, and it is not as bulky as other knots. Therefore, we introduce this new sliding and one-way locking knot during the arthroscpic surgery of shoulder.

• The Science & Technology
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• v.10 no.3 s.94
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• pp.20-22
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• 1977

미국의 연방 에너지 기구통합의 가능성은 카터 대통령의 취임으로 한층 실현성을 굳혀 가고있다 이 문제에 관해서 포드 전 대통령은 퇴임 직전인 지난 1월 상순 「에너지 성」의 창설을 서둘르는 보고서를 의회에 제출하였고 지난1월17일 의회에 보낸 1978년도 (1977년 10월~1978년9월)예산 교서에도 에너지 성 구상을 강력히 제시했다. 의회에 제출된 보고서는 포드 정권하의 예산관리국과 에너지 자원심의회가 중심이 되어 취급했고 매듭지어진 것이지만 검토과정에서 카터대통령의 참모들이 어느정도 관여했다고 전해지고 있다 그 기본적인 안은 새 대통령에 의해 조정된 것으로 보여진다 이러한 실정에 따라 일반의 관심은 이 에너지 성 구상에 대한 의회의 반응과 성청간의 조정 문제로 옮겨지고 있다

• Journal of Ocean Engineering and Technology
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• v.14 no.1
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• pp.95-101
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• 2000

In general, free form design depends on B-spline which is used for the generating hull lines in most of shipyards. But, nowadays, the NURBS method is applied to free form modeling method, which is able to more flexible transformation than B-Spline, and then became industrial standard in the various field. Therefore, this method has been considerably applied in new application fields which are required free form modelling. In this paper, the program called 2DSURF with 5 modules and developed for the generation of hull lines is described. It is examined whether the program can be applied to body lines, sheer lines, and half breadth lines.

• Proceedings of the KIEE Conference
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• 1999.07a
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• pp.290-292
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• 1999

핵연료봉이나 제어봉과 같은 봉구조물의 검사를 위하여 원격장와전류 효과를 낼 수 있는 탐촉자를 설계하고 탐상주파수를 유한요소해석을 통해 설정하였다. 핵연료봉을 대상으로 한 해석에서 exciter coil 주변을 차폐하고 500kHz의 주파수를 사용한 결과 전위계곡과 위상매듭의 존재가 나타나 원격장와전류 효과가 구현되었음을 확인하였다. exciter와 sensor coil로 이루어진 탐촉자를 이동시키면서 예측한 탐상신호에서는 센서를 원격장 의치에 고정시켰을 때, 결함이 센서를 지날 때의 위상신호와 결함이 exciter를 지날 때의 위상신호가 서로 달리 나타났다. 또한, 외부결함과 내부결함이 센서를 지날 때의 위상지연은 작지만 서로 반대의 경향으로 나타났으며, 두 종류의 결함이 exciter를 지날 때는 위상지연이 상대적으로 크게 줄어들고 외부/내부 결함에 상관없이 신호가 비슷하게 나타남을 볼 수 있었다. 이러한 신호형태는 자성체 관의 탐상에서 내, 외부 결함신호가 구별이 안되고, 동일한 위상신호가 항상 쌍으로 나타나는 것과 비교할 때, 신호해석을 훨씬 수월하게 해 줄 수 있을 것이라고 판단된다.