• 한국항공우주학회지
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• 제41권12호
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• pp.967-974
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• 2013

저자는 최근 산업체 생산 현장에서 Z-피닝 복합재 구조물을 간편하게 제작할 수 있는 Z-피닝 패치 개념을 제안하였고, 이를 적용하여 복합재 단일-겹침 전단 접합시편을 제작하였으며, 정적시험을 통하여 54~68%의 접합강도의 향상을 발표하였다. 본 연구는 상기 연구의 후속으로서, 반복하중에 대한 접합강도의 향상을 측정하기 위하여 피로시험을 수행하였다. 사용된 Z-핀은 스테인레스강 핀이며, 복합재료와의 결합력을 증가시키기 위하여 표면을 요철 형상으로 가공하였으며, 화학적으로 부식시켰다. 반복하중 조건에서 접합강도는 약 98~125% 향상되었다.

• 한국실내디자인학회논문집
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• 제23권4호
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• pp.52-62
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• 2014

The rapid growth of economy improves not only the life quality of people in this modern society but also standards of value in connection with how those people would spend money as they engage in various leisure and cultural activities. That being the case, hotels are currently changing into places of new concepts depending on those new lifestyles of these people, and in those new places, people can entertain and experience as enjoying cultures. The marketing collaboration of the hotels with brands can be used as a more inclusive way to enhance brand images. In addition, as having infinite possibilities of the collaboration's being able to create a new-concept space with an identity of a brand included, this collaboration makes it possible for the design hotels to decorate their interior spaces differently from those of other hotels. In the light of that, the brand collaboration is basically divided into three groups which are the fashion collaboration, the technique collaboration and the designer collaboration, and the brand collaboration is also able to express the interior spaces of the design hotels as working on those six components, such as reproduction, events, alteration, messages, culture and image. After all, through the brand collaboration marketing, this thesis expects an interior design of a new-concept design hotel which would play a role as a complex cultural space.

• 교육시설 논문지
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• 제23권4호
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• pp.21-30
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• 2016

This study considers the concept of schools and their spatial composition by John Dewey through literature review who argued for a new, children-centered education in the early 19th century, and it also mentions some suggestions for improvement of the elementary school facilities in Korea that the size and number of students in school has decreased sharply. John Dewey claimed that a school is a big household as well as a small society in which one studies the current occupation and experience in connection between the household-school-society. At the same time, he pursued an organic and open spatial composition which can effectively and efficiently enable educational curriculum's application, social occupation and project learning based on children's native impulse and stage in child growth. Korea's education policy should shift from quantity-based education production to quality-based production due to the reduction of school age population among other reasons. Especially this study emphasizes that small size schools need to be changed to local community facilities with environment-friendly, children-centered and open learning spatial composition with basis on John Dewey's educational philosophy.

• 한국국방경영분석학회지
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• 제27권2호
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• pp.88-109
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• 2001

Defense minister of the ROK, Kim Bong-sin suggested that the ROK′s military build-up policy will change from "scenario-based" to "capability-based". Entering the 1990s the ROK′s military build-up policy met difficulties to accomplish its goal, modernizing and strengthening of its force structure and weapon systems because of limited budget. The concept of capability-based military build-up could commit a fault in estimating total amount of defense resources required for force planing. This is because that the total amount of defense resources related to force plan for the 15 years is fixed to embody military strategy. The concept of capability-based military build-up plays a role as a constraint in choosing a military strategy. This has no connection with military build-up. Therefore the resources of mid-term military build-up program and scale of annual defense budget could be affected by the situations of its national economy. In this respect, the scale of annual defense budget and resources could be changed in accordance with national economic condition, however, the total amount of resources required to build-up military force for 15 years, namely resources of military force planing requirement for 15 years, is given already for the accomplishment of military strategy. The purpose of this study is to seek a direction of the ROK′s military build-up policy in a viewpoint of capability-based military build-up.

• 한국기계가공학회지
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• 제18권11호
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• pp.24-34
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• 2019

An automotive automatic transmission is a popular power-transmitting device in passenger vehicles, as it provides various speed ratios for diverse driving conditions with easy manipulation and smooth gear shifting. The transmission is mainly composed of input and output shafts, planetary gear sets, brakes/clutches, and housing, and it yields multiple forward gears and one reverse gear by actuating the shifting devices of the brakes and clutches. In developing a new transmission, kinematic configurations of a transmission, which presents a brief structure and actuation schemes for speed ratios, need to be checked to determine if the structure can be assembled in a layout. It is impossible for a transmission concept having any interference in connecting main components to be developed further in the design process, since connection interference leads to failure of a layout design in the 2-D plane. In this research, an analysis of the assemblability of a front-wheel drive automatic transmission is carried out on an example concept design by applying the vertex addition algorithm based on graph theory.

• International Journal of Advanced Culture Technology
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• 제9권2호
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• pp.106-117
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• 2021

The aim is to find cyber measures in consideration of physical CPTED in order to prepare countermeasures for cybercrime prevention. For this, the six applied principles of CPTED were used as the standard. A new control item was created in connection with the control items of ISO27001. A survey was conducted on former and current investigators and security experts. As a result of the reliability analysis, the Kronbar alpha coefficient value was 0.947, indicating the reliability of the statistical value. As a result of factor analysis, it was reduced to six factors. The following are six factors and countermeasures. Nature monitoring blocks opportunities and strengthens business continuity. Access control is based on management system compliance, personnel security. Reinforcement of territoriality is reinforcement of each wife and ethics. Establishment of security policy to enhance readability, security system maintenance. Increasing usability is seeking ways to utilize, periodic incentives. For maintenance, security education is strength and security-related collective cooperation is conducted. The differentiation of this study was to find countermeasures against cybercrime in the psychological part of the past. However, they approached to find in cyber measures. The limitation of the study is to bring the concept of physical CPTED to the cyber concept.

• Structural Engineering and Mechanics
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• 제85권3호
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• pp.305-314
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• 2023

The article is about the theoretical analysis of the transmission and reflection of elastic waves through the interface of perfectly connected materials. The solid continuum mediums considered are piezoelectric semiconductors and transversely isotropic in nature. The connection among the mediums is considered in such a way that it holds the continuity property of field variables at the interface. The concept of strain and stress introduced by non-local theory is also being involved to make the study more applicable It is found that, the incident wave results in the generation of four reflected and three transmitted waves including the thermal and elastic waves. The thermal waves generated in the medium are encountered by using the concept of three phase lag heat model along with fractional ordered time thermoelasticity. The results obtained are calculated graphically for a ZnO material with piezoelectric semiconductor properties for medium M₁ and CdSc material with transversely isotropic elastic properties for medium M₂. The influence of fractional order parameter, non-local parameter, and steady carrier density parameter on the amplitude ratios of reflected and refraction waves are studied graphically by MATLAB.

• 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

• 한국수학사학회지
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• 제25권1호
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• pp.71-88
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• 2012

정적분을 이용한 자연로그 학습은 구체적인 개념이미지 형성이 어려운 부분이 존재하기에 역동적인 프로그램을 이용하여 시각적 추론의 과정을 거치는 접근방법이 개념이미지를 형성하는데 중요한 역할을 한다. 즉, 역동적인 프로그램 환경에서 학습하는 것은 학생들에게 수학적 개념을 구체적으로 인식하게 하는 유용한 교수 학습 방법이 될 것이다. 이에 본 연구는 전공학부 학생들이 역동적 프로그램이며 시각적 도구인 GeoGebra 환경에서 정적분을 이용한 자연로그 그래프를 이해하는 과정을 탐구하고 분석하여 그 특징을 알아보았다. 그 결과, GeoGebra 프로그램 환경을 바탕으로 학습하는 것은 학생들 스스로 오류를 수정하고 조작하는 활동을 행할 수 있어서 주어진 문제에 대한 해결과정을 직접 관찰 분석할 수 있다는 장점이 있다는 것을 알게 되었다. 또한, 역동적인 프로그램인 GeoGebra를 이용하는 것은 정적분을 이용한 자연로그 그래프를 보다 구체적으로 인식 이해 할 수 있고 개념이미지를 효과적으로 형성할 수 있다는 것을 확인할 수 있었다. 따라서 역동적인 프로그램 환경을 활용하는 것은 단순한 암기 주입식 교육환경에서 경험할 수 없었던 실체적인 수학개념에 대하여 접근할 수 있는 기회를 제공한다는 교육적 시사점을 제시하였다.

• 한국과학예술포럼
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• 제19권
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• pp.515-525
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• 2015

급속한 1인가구의 증가함에 따른 1인 소비, 1인 경제의 개념이 강조되는 현재 한국은 1인 가구 비율이 25.3%를 차지하고 있으며 그 수는 지속적으로 증가할 것으로 전망되어진다. 이러한 급격한 증가와 비례하여 수도권의 주택문제와 더불어 이기주의, 개인이 느끼는 외로움, 범죄와 같은 많은 문제를 야기한다. 이에 대한 대안의 움직임으로 공동체와 커뮤니티 문화, 그리고 공간의 공유와 나눔에 대한 관심과 인식이 증가하고 있으며 이에 따른 셰어하우스 문화에 대한 관심과 선호도가 급격히 높아지고 있으며 각 매체에서도 셰어하우스와 같이 더불어 사는 삶에 대한 내용이 자주 등장한다. 일본에 많이 보급되고 익숙하게 받아들여지는 셰어하우스는 경제적 부담을 줄일 뿐 만 아니라 그들만의 문화를 형성하고 커뮤니티를 형성하는 등 경제적 이점을 넘은 공유가 주는 이점을 대변하는 삶의 방식이다. 본 연구는 셰어하우스의 특성에 관한 연구를 바탕으로 공간을 사용하는 상황에 대한 고찰을 해보고 이를 공동생활을 중심으로 다양한 상황이 발생하고 이를 자연스럽게 수용했던 한국전통주거공간의 무자성에 대한 고찰을 바탕으로 특성을 도출하고 이를 바탕으로 현재 셰어하우스의 공간을 분석하고자 한다.