• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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• pp.745-746
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• 2006

This lecture introduces new press, adapter and control concepts to size multi-level sintered components. The essential thing here is that the advantages of the multi-plate technology have been applied to the sizing adapter concept. Thus, the new concept meets the demands for a modern P/M manufacture and offers sufficient potential to size any future, complex sintered components such as synchronizer hubs, oil pump wheels and VCT parts with highest precision. Furthermore, it outlines a new flexible concept for the parts transfer, including feeding, orientation and lubrication while responding to the high demands on process stability and short change-over times.

• 설비공학논문집
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• 제12권1호
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• pp.26-32
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• 2000

Design load calculations which depend on the thermal characteristics of the building structure such as the wall, roof, and fenestration provide the basic data for selecting an HVAC system and its equipment. Most of domestic multi-family houses include a high thermal storage layer like massive concrete structure and a floor heating structure. This study is to compare the results of the design heating load between steady state and unsteady state calculation in order to comprehend the thermal storage effect in multi-family houses. The design heating load under the steady state calculation is estimated from 5.4% to 7.8% larger than that under the unsteady state in the typical floor of a multi-family house model. The design heating load considered the safety factors like a orientation and location factor also is 21.4% to 26.5% larger than that by the unsteady state calculation. So, the safety factors for use of the practicing engineer are analyzed as the main factor of a heating plant oversizing.

• 한국세라믹학회지
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• 제32권3호
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• pp.313-320
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• 1995

We investigated the preferred orientation, electrical and magnetic properties of the Mn-Zn ferrite thin films deposited on SiO2/Si(100) by ion beam sputtering. The Cu-added Mn-Zn ferrite thin films had a preferred orientation of (111) with a weak orientation, (311). While the Zn-added one had a strong (111) preferred orientation. The saturation magnetization of the Cu- or Zn-doped Mn-Zn ferrite films increased with increasing substrate temperature (Ts) due to the increase of grain size and the enhancement of crystallinity. For the same reason the coercivity of Cu- or Zn-doped Mn-Zn ferrite films deposited at low Ts increased with increasing Ts, but those of the films deposited at high Ts slightly decreased not only because the defect density of the films decreases but because more grains have multi-domains with increasing Ts. The resistivity of Cu- or Zn-added Mn-Zn ferrite thin fims measured by complex impedance method decreased with increasing Ts due to the ehhancement of crystallinity as well as due to the increase of grain size.

• 대한기계학회논문집
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• 제19권9호
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• pp.2181-2193
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• 1995

The effective elasticity and conduction of composite materials containing arbitrarily oriented multiple phases has been analyzed using the concept of orientation-dependent average fields and concentration factors. The analysis provided closed form expressions for the effective stiffnesses and conductivities. Under the prescribed boundary conditions, the concentration factors were evaluated by the equivalent inclusion principle, through which the interaction between various phases is approximated by the Mori-Tanaka mean-field approximation. SiC particulate(SiC$_{p}$) reinforce aluminum(Al) matrix composites were fabricated and their elastic constants and electrical conductivities were measured together with a careful study of their microstructure. The measured properties showed a systematic anisotropy and this behavior could be attributed to the preferred orientation of SiC$_{p}$. The theoretical model developed was applied to the computation of the anisotropic properties of these composites. Both two-phase and three-phase composites were considered based on the microstructural information. The SiC$_{p}$ was modeled as an ellipsoid with planar random orientation distribution in the extruded Al/SiC$_{p}$ composites. The effect of extraneous phase such as intermetallic compounds was also investigated.tigated.

• 한국주거학회논문집
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• 제15권2호
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• pp.87-96
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• 2004

In this study, we analyzed the state of outdoor-space use and green-environment development for apartment residents, and investigated their ways of thinking on nature orientation and green environment. The results are as follows. 1) The ways of thinking and actual use of outdoor space by apartment residents appear different. 2) Due to the difference of apartment locations and complex environments, the state and reason of green environment construction are different between the residents of high-rise and low-storied apartments. 3) The residents of the low-storied apartments are more satisfied with the green environments of the complex than those of the high-rise apartments. In addition, constructing the green environment in a balcony and outdoor space enhances the satisfaction level of the apartment residents. 4) The residents of the low-storied apartments are passive in nature orientation, while those of the high-rise apartments are active. 5) Depending on the types of nature orientation, the apartment residents are grouped as 'people of nature experience', 'nature appreciators', or 'people of living-thing contact'. These groups show different patterns on the ways of thinking for outdoor space and green environment.

• 한국군사과학기술학회지
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• 제15권4호
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• pp.502-506
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• 2012

In order to find the structural characteristics of the thin films of group II-VI semiconductor compounds compared with those of powder materials, films were made of 4 powders of ZnS, CdS, CdSe, and CdTe(Aldrich), each with 99.99 % purity. For the ZnS/CdS multi-layers, the ZnS layer was coated over the CdS layer on an $AlO_x$ membrane, which served as a protective layer within a vacuum at the average speed of 1 ${\AA}$/sec. After studying the structures of the group II-VI semiconductor thin films by using X-ray spectroscopy, we found that the ZnS, ZnS/CdS, CdS, and CdSe films were hexagonal and exhibited some degree of preferred orientation. Also, the particles of the thin films of II-VI semiconductor compounds proved to be more homogeneous in size compared to those of the powder materials. These results were further verified through scanning electron microscopy(SEM), EDX analysis, and powder and thin film X-ray diffraction.

• 한국조리학회지
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• 제20권1호
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• pp.1-17
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• 2014

호텔 업계에서 고객접점 직원들의 서비스 지향적인 조직시민행동의 선행요인에 관한 연구의 필요성이 제기되어, 본 연구는 목표지향성을 선행요인으로 하여, 서비스 지향적인 조직시민행동에 미치는 영향에 관하여 연구하고자 실시하였다. 선행연구를 바탕으로 하여, 목표지향성은 성취-목표 지향성과 배움-목표 지향성으로 나누어졌으며 이 요인들과 서비스 지향적인 조직시민행동의 하위요인(충성도, 서비스 전달, 참여성) 간의 관계 가설이 설정되었다. 특 1급 호텔 직원 266명의 설문이 분석되었다. 분석을 위해, SPSS 19.0과 AMOS 20.0을 이용하여 기술통계분석, 다변량분석, 구조방정식 모형분석이 실시되었다. 그 결과, 배움-목표 지향성은 충성도, 서비스 전달, 참여성 모두에게 긍정적인 영향을 미치는 것으로 나타났다. 반면, 성취-목표 지향성은 충성도를 제외한 두 하위 요인에 긍정적인 영향을 미치는 것으로 나타났다. 이러한 결과는, 호텔 경영인들이 특정한 목표를 진심으로 지향하는 지원자를 발굴할 필요성을 시사한다. 나아가, 호텔조직은 구성원들의 목표지향성을 이용해서, 그들의 성과 향상에 동기를 부여할 필요성을 제시한다.

• 한국의류산업학회지
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• 제10권4호
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• pp.526-536
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• 2008

This study is to analyze and examine the relations of lifestyle, fashion behavior, and make-up behavior of post digital generation and to provide the basic data which help to establish and perform the distinctive marketing strategies targeting the post digital generation. Subjects were 1,460 male and female undergraduates who attend colleges or universities in Seoul, Busan, and Daegu. Average, standard deviation, MANOVA, and ANOVA were conducted using SPSS 12.0 statistic program. The results were as follows: The higher points the group got in all the subfactors regarding information seeking pursuit and sensation intention fascination pursuit, the higher points the group had in the subfactors of fashion behavior and make-up behavior. The group with higher fashionenjoyment pursuit appeared to seek after more brand price choice behavior, internet shopping purchasing behavior, fashion information source seeking behavior, and impulse buying behavior in the subfactors of fashion behavior as well as more self-satisfaction appearance orientation and fashion information buying orientation in the subfactors of make-up behavior. With the group in pursuit of more multi activities, not only were brand price choice behavior and fashion information source seeking behavior in the subfactors of fashion behavior sought after more, but self-satisfaction appearance orientation and fashion information buying orientation in the subfactors of make-up behavior were pursued more as well. The more interpersonal relations the group had, the more self-satisfaction appearance orientation and fashion information buying orientation in the subfactors of make-up behavior as well as the more brand price choice behavior, fashion information source seeking behavior, impulse buying behavior, other-regarding behavior and independent buying behavior in the subfactors of fashion behavior the group had.

• 폴리머
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• 제25권2호
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• pp.240-245
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• 2001

다극 이방성 Sr-페라이트 소결자석을 제조하기 위한 자장중 분말사출성형공정에서 Sr-페라이트 자성분말의 배향도에 미치는 결합제의 첨가제 영향이 연구되었다 외부자기장의 방향에 대한 Sr-페라이트 자성분말의 배향도는 첨가제의 종류, 사출성형온도와 관련한 사출성형체의 유동성과 외부자기장의 세기에 크게 의존하였다. Paraffin wax/carnauba wax/HDPE 3성분계 결합제에 stearic acid를 첨가하면 분말사출성형체의 유동성이 향상되어 Sr-페라이트 자성분말의 배향도가 증가되었으나, silane계 커플링제를 첨가하면 성형체의 유동성이 오히려 감소되어 Sr-페라이트의 배향도가 감소되었다. 80% 이상의 Sr-페라이트 자성분말의 배향도는 사출성형체의 겉보기점도가 2500 poise (1000sec$^{-1}$)이하이고 외부자기장의 세기가 4kOe 이상인 유용한 조건에서 얻어졌다.

• 디지털융복합연구
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• 제18권8호
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• pp.119-131
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• 2020

스타트업이 전통적 거대기업을 물리치는 역전현상의 원인으로, 기업가정신과 시장지향이 조직문화와 경영성과 관계에 미치는 매개효과를 살펴보는 것이 본 연구의 목적이다. Hayes(2013년)가 제안한 부트스트래핑의 연구방법을 통해 총효과, 직접효과, 간접효과 분석을 실시했다. 그 결과 조직문화와 경영성과 사이에는 직접적인 영향관계가 없었지만, 조직문화와 경영성과의 관계에서 기업가적 행동과 시장지향성을 모두 매개함으로써 경영성과에 긍정적인 영향을 미친다는 것을 확인했다. 본 연구는 기업가정신과 시장지향성 등 기존 이론과 연계하고 기업성과에 필요한 역량목표의 범위를 조직문화로 확대하였다는 점에서 의의가 있다. 기업은 경영성과와 가치창출을 위한 혁신지향적 조직문화를 창출하고 기업가적 행동과 시장지향성을 가지고 조직의 관성으로부터 문화를 개방할 필요가 있다.