• 패션비즈니스
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• 제16권1호
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• pp.52-68
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• 2012

To achieve the aim of this study, 9 different types of samples were made to examine mechanical property according to structured pattern and type of Machi of pullover armhole of WholeGarment(seamless knitwear). With respect to samples, from which comparisons are made and anaylzed among basic characteristics of material, tensile strength & elongation and residual elongation due to repeated extension of armhole connecting part, the following conclusions could be obtained. It's revealed that the tensile strength of Machi part as being armhole connecting part of samples is more affected by Machi type than pattern structure. Of Machi types, it showed stronger tensile strength in the order of Normal(Normal Machi)< Machi_B(unilateral Machi)

• 한국치위생학회지
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• 제15권6호
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• pp.1033-1041
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• 2015

Objectives: The purpose of the study is to find out the effect of part-time employment experience on adaptation to university life in dental hygiene students. Methods: A self-reported questionnaire was completed by 288 dental hygiene students in Seoul and Gyeonggido from September to October, 2014. The questionnaire consisted of general characteristics of the subjects(5 items), part-time employment experience(6 items), and adaptation to university life(53 items). The instrument for adaptation to university life was adapted from Baker and Sirky and modified by Kwon. Likert 5 point scale adaptation included personal emotion adaptation, academic adaptation, social adaptation, and university environment adaptation. Cronbach's ${\alpha}$ was 0.80 in the study. Results: The adaptation to university life was 3.0 points. The higher the economic level was, the higher the personal emotional adaptation(p<0.001) and academic adaptation were(p<0.05). The adaptation to university life was positively influenced by tuition support by parents and part-time employment(p<0.05). The part-time employment was significantly helpful to future job selection, social adaptation, and university environment adaptation(p<0.001). Economic stability and advantage of future job selection had a positive influence on the adaptation to university life. So the adaptation to university life was proportional to younger age, economic stability, and advantage to future job selection. Conclusions: It is very important to give a positive motivation and stimulation, and a careful counseling to the students in part-time employment. In order to encourage the part-time employed students, major-related part-time job opening must be given.

• 한국추진공학회지
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• 제22권3호
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• pp.128-133
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• 2018

국내 민간 소형 비행기 동력장치의 감항기준은 KAS Part 23 "감항분류가 보통(N), 실용(U), 곡기(A), 커뮤터(C)류인 비행기에 대한 기술기준"과 Part 33 엔진에서 규정하고 있다. 이 기준은 미연방항공청(FAA)의 FAR Part 23 및 Part 33과 유럽항공안전청(EASA)의 CS-23 및 CS-E와 동등한 체계를 갖고 있다. FAA(2016.12.12.)와 EASA(2017.3.29.)는 소형 비행기의 감항기준을 개정하였다. 설계 방식과 적합성 입증방법을 지정한 '규범적 규정'에서 안전한 성능을 달성하도록 목표를 지정하는 '성능기반 규정'으로 전환한 것이다. 이러한 개념 전환에 따라 동력장치 감항기준 또한 대폭 변경되었다. 이에 따른 FAA의 동력장치 인증요건 개정 사항을 살펴보고 국내 감항기준 개정 방향을 고찰하였다.

• 한국압력기기공학회 논문집
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• 제7권3호
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• pp.61-66
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• 2011

The integrity of the SG(Steam Generator) tubes has been challenged by numerous factors such as flaws, operation, atmosphere, inherently degraded materials, loose parts and even human errors. Of the factors, loose parts(or foreign materials) on the secondary side of the tubes can bring about volumetric defects and even leakage from the primary to the secondary side in a short period of time. More serious concerns about the loose parts are their unknown influx path and rapid growth rate of the defects affected by the loose parts. Therefore it is imperative to detect and characterize the foreign materials and the defects. As a part of the measures for loose part detection, TTS(Top of Tubesheet) MRPC(Motorized Rotating Pancake Coils) ECT has been carried out especially to the restricted high probability area of the loose part. However, in the presence of loose parts in the other areas, wide range loose part detection techniques are required. In this study, loose part standard tube was presented as a way to accurately detect and characterize loose part signals. And the SG tube ECT bobbin coil and MRPC ISI(In-service Inspection) data of domestic OPR-1000 and Westinghouse Model F(W_F) were reviewed and consequently, comprehensive loose part detection technique is derived especially by applying bobbin coil signals

• 산업경영시스템학회지
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• 제41권3호
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• pp.115-119
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• 2018

Defining and measuring non-rigid or flexible parts has been controversial in industry for many years. There are two primary areas of controversy. The first is agreeing on what exactly a non-rigid part is. The second is agreeing on how to define and measure a non-rigid part. The subject of non-rigid parts is further complicated by the brief coverage it receives in the national and international standards. This leaves each company to improvise or create its own rules for non-rigid parts. There are some who believe that Geometrical Dimensioning and Tolerancing (GD&T) should not be used on non-rigid parts. This is not true. The ASME Y14.5M standard applies to rigid parts as a default condition. However, there is no definition given for a rigid part. The term rigid part has been used in industry for so long that it has gained a definition by its general use. When most people in industry say rigid part, they are referring to a part doesn't move (deform or flex) when a force (including gravity) is applied. How much force is relative based on the part characteristics. In reality, all parts will deform (or flex) if enough force is applied. Using this logic, all parts would be considered non-rigid. However, we all know that this is not how parts are treated in industry. Although GD&T defaults to rigid parts, it should also be used on non-rigid parts with a few special techniques. Actually 50~60% of all products designed contain parts or features on parts that are non-rigid. Therefore, we try to suggest the definitions of rigid and non-rigid parts and method to measure non-rigid parts.

• 한국기계가공학회지
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• 제12권6호
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• pp.52-59
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• 2013

In this study, strength and durability are investigated using structural and vibration analyses on models 1 and 2 of a press in common use. Model 1 has a structure in which a punch is applied from the upper part to the lower part; however, model 2 a structure in which a punch is applied from the lower part to the upper part. Maximum displacements of models 1 and 2 are 0.018184 mm and 0.025498 mm, respectively. Maximum equivalent stresses of models 1 and 2 are 14.144 MPa and 18.58 MPa respectively. Maximum displacements are shown for the punches of both models; model 1 has less deformation than model 2. Model 1 has more durability than model 2, as determined by an investigation of the structural strength. Using natural frequency analysis, model 1 was found to have maximum deformation in the upper part of punch. Mode1 2 has its maximum deformation in the column part of the body and the upper part of the fixed pin. Using harmonic stress analysis, the maximum deformations were found on the punch part and column part of the body in the cases of models 1 and 2, respectively. As the maximum total deformation and equivalent stress in the case of model 2 are shown to become 40 times those values of model 1, the vibration durability of model 2 can be seen to be weaker than that of model 1.

• 한국전산구조공학회논문집
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• 제25권4호
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• pp.307-314
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• 2012

모듈러 강교량 제작, 조립, 설계, 시공단계에서 상부모듈의 부품정보를 효율적으로 제공하고 교환하기 위하여 BIM(Building Information Modeling) 프로젝트에서 정보교환을 위하여 사용하는 국제표준인 IFC 모델을 활용한 부품정보 라이브러리 구축방법을 제시하였다. 모듈러 강교량의 상부모듈을 구성하는 부품정보를 IFC 모델로 표현하기 위하여 의미론적인 관점에서 기존 IFC 모델에서 부품정보를 표현할 수 있는 엔티티와 모듈러 강교량의 구성요소를 매칭하여 적용하였으며, 구성요소의 역할을 구분하기 위하여 매칭한 엔티티의 타입을 적용하거나 사용자정의 타입으로 정의하였다. 또한, 부품 정보 라이브러리에서 부품 및 조립품의 정보를 해당단계에서 효율적으로 제공하기 위하여 조립체계를 네 단계의 상세수준(LoD)으로 구분하여 정의하였으며, 이를 IFC 모델로 표현하기 위하여 새로운 속성정보를 정의하였다. 마지막으로, IFC 모델과 매칭하여 정의한 정보를 실제 모듈러 강교량 상부모듈에 적용하여 IFC 기반의 시범 라이브러리 정보를 생성하였다.

• 한국의사학회지
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• 제27권1호
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• pp.87-112
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• 2014

Purpose : "The Part of Cold damage in Uihakipmun" is the collection of the books on Cold damage which follow the way of description focusing on symptoms before Ming dynasty. "The chapter of First symptom" in this part is the first chapter which described focusing on the symptoms in earnest. This research is to discover the reference books of "The chapter of First symptom" in detail. Methods : I compared the books presented in the reference list of "The Part of Cold damage in Uihakipmun" with the sentences of "The chapter of First symptom". Results & Conclusions : "The chapter of First symptom" referred to "Sanghanyukseo(傷寒六書)" and "Injaesanghanryuseo(仁齋傷寒類書)" mainly, and the rest were supplemented with other books like "Hwalinseo(活人書)". And the books which were not listed on the reference like "Sanghanmyeongriron(傷寒明理論)", "Yupyeonhwalinseogwaljijangdoron(類編活人書括指掌圖論)" were also referred in part. Among the reference list of "The Part of Cold damage in Uihakipmun", "Baekmun(百問)" doesn't indicate "Sanghanbaekmun(傷寒百問)" but "Sanghanbaekmunga(傷寒百問歌)". As for the history of the books on cold damage which described focusing on symptoms, "Injaesanghanryuseo" added new contents on the basis of "Hwalinseo" and after that, it had a large influence on "Sanghanyukseo" and "The Part of Cold damage in Uihakipmun". In case of 33.4% of the chapter of first symptom, the reference books were not found. It includes the part that the reference books were not found and also the part that Lee Cheon added his personal opinion. For this parts, the in-depth study is needed afterwards.

• 산업노동연구
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• 제17권1호
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• pp.269-295
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• 2011

본 논문은 파트타임근로를 통해서 짧은 시간 내에 높은 고용률 향상이라는 성과를 달성한 네델란드에서의 파트타임근로의 현황과 전망, 제도와 정책 등을 종합적으로 살펴보는 글이다. 네델란드는 파트타임근로를 통한 고용률 제고뿐만 아니라 양질의 파트타임을 만들어냈다는 점에서 주목받고 있다. 네델란드에서 파트타임근로가 증가한 것은 시장, 제도, 정책, 그리고 노사관계 등 다양한 요인들이 파트타임근로를 촉진하는 방향으로 서로 보완하면서 발전하였기 때문이다. 노동시장에서는 여성의 경제활동참가 증가와 기업의 파트타임수요의 증가라는 선순환 구조가 형성되었고, 파트타임근로를 보호하고 파트타임에 유리하도록 인센티브 구조를 재설계하며 근로시간선택권을 보장하며 보육시스템을 강화하는 제도나 정책이 지속적으로 강화되었다. 그러나 이러한 시장에서의 수요-공급의 선순환 구조와 파트타임을 촉진한 제도와 정책도 노사정 사이의 사회적 합의라는 커다란 틀 속에서 그에 기초해서 이루어진 것이었다는 점이 중요하다. 또한 거의 30년 가까지 지속된 네델란드모델은 노동시장의 문화와 관행으로 정착되어 풀타임근로나 노동시간 확대의 방향으로 전환하기는 어려운 것으로 평가된다. 따라서 네델란드 모델은 네델란드의 사회적 조건 하에서 성립한 특수한 모델이고 높은 수준의 사회적 합의를 기초로 하여 제도와 시장이 보완적으로 잘 결합되어 있는 모델이기 때문에 여타 국가가 부분적인 제도 이식을 통해서 성과를 내기는 어렵다고 판단된다.

• Journal of Forest and Environmental Science
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• 제37권4호
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• pp.304-308
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• 2021

Iris koreana (Iridaceae) is an endangered plant native to Korea. In order to develop an in vitro propagation method, we investigated the effect of 2,4-dichlorophenoxy acetic acid (2,4-D) and a-naphthalene acetic acid (NAA) on callus induction in different I. koreana tissues. In addition, we also investigated the effect of 2,4-D and Benzyl aminopurine (BA) treatments on adventitious shoot induction in viable calli and the effect of indole-3-butyric acid (IBA) on root formation in viable shoots. We found that callus production was highest with 1.0 mg/L NAA (94.4% cultured rhizome explants), and adding low concentrations of 2,4-D to BA containing media significantly increased the frequency of shoot primordial formation. The best rooting results were obtained with 1.0 mg/L IBA, on which 98% of regenerated shoots developed roots and produced an average of 7.4 roots within 45 days. This in vitro propagation protocol will be useful for conservation, as well as for mass propagation.