• 한국주조공학회지
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• 제21권5호
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• pp.290-295
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• 2001

We fabricated test samples containing various shape elements and surface roughness checking points for the jewelry cast master patterns by employing the 3D computer aided design (CAD), selective laser sintering (SLS) rapid prototype (RP) with the DuraForm powders. We varied the alignment angle from $0^{\circ}$ to $10^{\circ}$ at a given layer thickness of 0.08 and 0.1mm, respectively, in RP operation. Dimensions of the shape elements as well as values of surface roughness are characterized by an optical microscope and a contact-scanning profilometer. Surface roughness values of the top and vertical face increased as the alignment angle increased, while the other roughness values and shape elements variation were not depending on the alignment angle. The resolution of the shape realization was enhanced as the layer thickness became smaller. The minimum diameter of the hole, common in jewelry design, was 1.2 mm, and the shrinkage became 12% at the 1.6 mm-diameter hole, Our results implied that we face down the proposed design elements with $0^{\circ}$ alignment angle, and consider the shrinkage effect of each shape element in DuraForm RP jewelry modeling.

• 경영과학
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• 제25권2호
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• pp.43-55
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• 2008

Contingent valuation method(hereafter CVM) is generally believed to be one of the most popular methods used for quantifying the value of non-market goods or services particularly by asking respondents of willingness to pay. This study deals with how to use CVM in calculating the value of mobile telephone service by suggesting methodology of estimation and eliminating biases. This study represents an attempt to estimate the WTP(Willingness To Pay) of the mobile telephone service using the face-to-face interview which is the qualitative technique is used. In this study, by using the single bound dichotomous choice model(SBDC) in order to analyze the valuation of mobile telephone service, WTP was estimated. Also we analyze the factors to pay for mobile service in which it becomes the important factor of demanding services. We used logit model. In order to provide robust estimates of WTP, we have used the Method of Montecarlo Simulation. Consequently, consumers showed that WTP about the mobile communications service is generally high. And it could know that the WTP will fell down as the specialized knowledge about the mobile communications frequency was high. It will be able to become the important part to not only the business carrier but also the policy maker to estimate the economic value of mobile telephone service.

• 간호행정학회지
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• 제17권4호
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• pp.451-461
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• 2011

Purpose: The purpose of this study was to explore emotional labor experienced by nurses in ambulatory care setting. Method: The phenomenological method developed by Giorgi was used for this study. The participants were 9 nurses who had experienced emotional labor. Data were collected between May and August 2010 by face-to-face interviews. The interview was recorded and then transcribed. Results: The constituents associated with the meaning of the nurses' experiences of emotional labor in ambulatory care setting were as followings: bearing down of suffering emotions coming up from the bottom, feeling loneliness when having to undertake care alone by oneself, having conflict between nursing professional and services, managing mind by means of both internal and external resources, getting ridding oneself of conflict with forced emotions over time. Conclusions: The results of this study should contribute to a deeper understanding of the meaning of emotional labor experienced by nurses in ambulatory care. The results also highlight the need to develop programs for nurses in ambulatory care setting to help them express their real action.

• Journal of the Korean Wood Science and Technology
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• 제16권4호
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• pp.61-69
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• 1988

Recently the automization of wood manufacturing and the development of CNC machine tools becomes the center of interest. Cutting mechanism, tool wear and the roughness of machined surface have been studied. In the studies about wood for special uses, concrete data of cutting is desired. While Pinus densiflora is characterized that heartwood develops as age increases, Chunyang District has the characteristic of strength, red color, relatively regular chap and high heartwood - percentage. But there is no data about cutting this wood, Chunyang District. In this study face milling by sintered carbide tool was excuted to Chunyang District. Cutting force, Surface roughness and states were investigated with regard to cutting speed. Example results were as follows; 1) Mean cutting resistance against lateral component force and longitudinal component force decreased rapidly up to cutting speed of 155 m/min, and remains constant above this speed. 2) The surface roughness of cutting surface lowered as cutting speed increased, regardless of fiber formation. Radial rougness of fiber is larger than lineal surface roughness. 3) Increase in Cutting speed made machining mark restrained. Down-milling showed larger marks than up-milling.

• 한국디지털정책학회:학술대회논문집
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• 한국디지털정책학회 2003년도 창립학술대회
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• pp.45-57
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• 2003

In recent years, the number of digital content transaction has increased dramatically, in main, owing to the innovation of IT technology. At the same time, it creates new problems which have never been found in traditional transactions. Especially, due to the easy-copy characteristics of digital content, the illegal usage of digital content proliferates. Also the conflicts between seller an d buyer in digital content transactions on cyberspace market take place frequently because contracts were made without face-to-face discussion. The increase of illegal usage and conflict in digital content market would diminish motivation of creators for their work, furthermore break down digital content market on cyberspace. Digital content transaction authentication system would play an important role in creating sound digital content market. Especially, it would make big contribution to reducing the number of conflict between seller and buyer. In this context, the main objective of this study is to suggest operational model of digital content transaction authentication and to explain critical success factors in organizing digital content transaction authentication system.

• 한국마이크로전자및패키징학회:학술대회논문집
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• 한국마이크로전자및패키징학회 2003년도 International Symposium
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• pp.261-278
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• 2003

Concepts.Wafer-Level Chip-Scale Concept with Handling Substrate.Low Accuracy Placement Layout with Isolation Trench.Possible Pitch of Interconnections down to $10{\mu}{\textrm}{m}$ (Sn-Grains).Wafer-to-Wafer Equipment Adjustment Accuracy meets this Request of Alignment Accuracy (+/-1.5 ${\mu}{\textrm}{m}$).Adjustment Accuracy of High-Speed Chip-to-Wafer Placement Equipment starts to meet this request.Face-to-Face Modular / SLID with Flipped Device Orientation.interchip Via / SLID with Non-Flipped Orientation SLID Technology Features.Demonstration with Copper / Tin-Alloy (SLID) and W-InterChip Vias (ICV).Combination of reliable processes for advanced concept - Filling of vias with W as standard wafer process sequence.No plug filling on stack level necessary.Simultanious formation of electrical and mechanical connection.No need for underfiller: large area contacts replace underfiller.Cu / Sn SLID layers $\leq$ $10{\mu}{\textrm}{m}$ in total are possible Electrical Results.Measurements of Three Layer Stacks on Daisy Chains with 240 Elements.2.5 Ohms per Chain Element.Contribution of Soldering Metal only in the Range of Milliohms.Soldering Contact Resistance ($0.43\Omega$) dominated by Contact Resistance of Barrier and Seed Layer.Tungsten Pin Contribution in the Range of 1 Ohm

• 기독교교육논총
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• 제63권
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• pp.13-37
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• 2020

중국 우한에서 발생한 코로나바이러스(COVID-19)의 전파력과 치사율에 주목한 WHO는 글로벌 비상사태를 선언했으나, 효과적인 치료제를 확보하지 못한 채 상황이 악화되자 팬데믹으로 상향 조정했다. 사회적 거리두기와 자가 격리 및 여행 제한에 따른 경제위기 때문에 자유무역 중심 세계 경제체제 붕괴와 세계화의 퇴조가 거론되고 있다. 팬데믹에 제대로 대처하지 못한 정치리더십이 도전받고, 사회는 비접촉과 부동성 문화로 급속히 전환 중이다. 교육 분야에서는 탈학교화라는 개념이 디지털 매체를 통해 물리적 공간에서 현실화하고 있다. 교회교육 역시 심각한 위기에 처했다. COVID-19 팬데믹 상황에서 교회들은 팬데믹에 관한 신앙 및 신한적 성찰, 온라인 예배와 체계적인 신앙교육, 그리고 비대면 중심의 목회까지 포괄하는 이른바 뉴노멀을 기대하고 있다. 포스트 코로나 시대에 교회교육은 급변하는 주변 상황에 부응해서 적극적으로 대안을 모색하면서 의미 있는 기독교적 가치에 초점을 맞춘 교육신학을 새롭게 재구성해야 한다. 아울러서 오프라인과 온라인을 결합한 모바일(또는 온라인) 교회학교를 운영하는 한편, 비대면과 면대면 학습을 혼용하는 학습방식(Blended Learning)을 도입하고, 교회학교와 홈스쿨링을 결합해서 교회와 가정이 교육의 책임을 분담할 필요가 있다.

• 대한가정학회지
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• 제44권4호
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• pp.39-47
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• 2006

This study considers the Gagye(Added Hair) style shown in ancient Goguryeo Murals and examines its values and significance through an in-depth study on the relevance to the style of China. In Gagye style, the Korean Hwan-gye(Round-rolled Hair) hair type was different from that of China in letting the hair down and using accessories. The Korean Sseu-gye(Covered Hair) hair type features textile-made and Bokbal (Covered hair) styles. The Korean Go-gye(Highly-rolled up Hair) hair type was different from that of China in style and volume. The Korean Da-gye(Multi-laid Hair) hair type was different from that of China in component pattern in that the Korean Da-gye type was composed of two or three gyes. Eoneun meori (Braided & Coiled Hair) features the unique Goguryeo pattern in which "Che" was placed on the head and the hair was braided down on the sides of the face. Therefore, the Gagye style of Goguryeo Murals was localized and developed through cultural interchange between Goguryeo and China. It also features its own values and significance in Korea's clothing history.

• 대한기계학회논문집A
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• 제28권2호
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• pp.149-157
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• 2004

Implicit finite element analysis of the flat surface-straight edge hemming process is performed by using a commercial code ABAQUS/Standard. Methods of finite element modeling for springback simulation and contact pair definition are discussed. An optimal mesh system is chosen through the error analysis that is based on the smoothing of discontinuity in the state variables. This study has focused on the investigation of the influence of process parameters in flanging, pre-hemming and main hemming on final hem quality, which can be defined by turn-down, warp and roll-in. The parameters adopted in this parametric study are flange length, flange angle, flanging die corner radius, face angle and insertion angle of pre-hemming punch, and over-stroke of pre-hemming and main hemming punches.

• 한국전자통신학회논문지
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• 제18권5호
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• pp.901-910
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• 2023

대학에서는 4차 산업혁명에 맞추어 디지털 융합시대를 이끌어갈 창의·융합 인재를 육성하기 위하여 프로그래밍 언어적 사고를 기반으로 SW교육을 비전공자 대상으로 운영하고 있다. 하지만 학습자들은 프로그래밍 언어의 문법과 생소한 프로그래밍 언어를 습득하는 과정에 난점을 겪고 있다. 본 연구에서는 SW 비전공자들에게 학습과정에서 고충을 해소하기 위해서 소프트웨어 교육 모형을 제안하는 데 목적을 두었다. 프로그래밍 언어사고를 기반으로 EZMKER kit 교구 교육모델 중심을 알고리즘 기술과 다이어그램 기술을 도입하여 프로그래밍 언어와 문법에 대한 학습부족을 극복하고 구조적 소프트웨어 교육모델을 Top-Down시스템 학습모델로 설계하여 구현하게 되었다.