• 대한조선학회지
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• 제9권2호
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• pp.43-48
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• 1972

Inertia friction welding, a relatively recent innovation in the art of joining materials, is a forge-welding process that releases kinetic energy stored in the flywheel as frictional heat when two parts are rubbed together under the right conditions. In a comparatively short time, the process has become a reliable method for joining ferrous, and dissimilar metals. The process is based on thrusting one part, attached to a flywheel and rotating at a relatively high speed, against a stationary part. The contacting surfaces, heated to plastic temperatures, are forged together to produce a reliable, high-strength weld. Welds are made with little or no workpiece preparation and without filler metal or fluxes. However, In order to obtain a good weld, the determination of the optimum weld parameters is an important problem. Especially, because the amount of the flywheel mass will be determined according to the initial rotating velocity values at the constant thrust load, the initial rotating velocity is an important factor to affect a weld character of the inertia-welded IN713C-SAE8630, which is used for the wheel-shafts of turbine rotors or turbochargers, exhausting valves, etc. In this paper, the effects of initial rotational velocity on a weld character of inertia-welded IN713C-SAE8630 was studied through considerations of weld parameters determination, micro-structural observations and tensile tests. The results are as the following: 1) As initial rotating velocity was reduced to 267 FPM, cracks and carbide stringers were completely eliminated in the micro-structure of welded zone. 2) As initial rotating velocity was reduced and flywheel mass was increased correspondingly, the maximum welding temperatures were decreased and the plastic working in the weld zone was increased. 3) As initial rotating velocity was progressively decreased and carbides were decreased, the tensile strengths were increased. 4) And also the fracture location moved out of the weld zone and the tensile tests produced, the failures only in the cast superalloy IN713C which do not extend into the weld area. 5) The proper initial rotating velocity could be determined as about 250 thru 350 FPM for the better weld character.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.426-431
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• 2006

Townhouse takes both private housings' and apartments' strengths as its own and forms a new style of house planning. It is highly convenient in maintenance and complement, also satisfying the residents with its independence and refundability. Currently, metropolitan area in Korea being the ignition of the townhouse planning, the gradual housing site development in metropolitan area is laying a foundation for further developments throughout Korea. Through amendment of legislation and qualitative upgrade of habitat, standard about new residence should be readied for activating of townhouse in korea. Therefore This research examines several residence types to secure diversification of residence type and good quality of residence place, introduce the townhouse that developed fast in internal recently and make a planed option for activating in korea.

• 문화기술의 융합
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• 제9권2호
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• pp.269-274
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• 2023

본 연구는 현대 긍정심리학적 관점에서 공자가 숱한 역경을 극복하고 수용하며 도약했던 힘의 원천, 공자의 회복탄력성의 요인을 알아보는 것이 목적이다. 공자에 대한 선행연구들은 주로 유교경전을 포함하여 사상적 측면(윤리, 정치, 교육 등)을 주로 다루어왔다. 이에 공자를 한 인간으로서의 삶을 재조명하고자 한다. 숱한 시련 속에서도 정신적. 신체적 한계를 수용하면서 자신의 불행을 딛고 사람이 지켜야 할 도덕과 가치를 전하면서 사람 속에서 진리를 실천할 수 있었던 긍정적 성품이자 강점을 오늘날의 긍정심리학에서 제시하는 역량 핵심개념과 비교하여 살펴보았다. 공자와 관련된 자료는 『논어 論語』 『사기 史記』 『공자가어 孔子家語』 및 문헌 등을 참조하였다. 연구를 통해 공자의 최대 강점은 위기지학(爲己之學), 시중(時中) 공자의 핵심사상인 인(仁)과 충서(忠恕)로 배려 속에서 더불어 사는 인간관계로 입증되었다.

• 한국심리학회지 : 문화 및 사회문제
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• 제25권1호
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• pp.1-26
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• 2019

본 연구의 목적은 부부의 개인별 덕목이 결혼만족도에 미치는 효과와 부부 덕목이 결혼 만족도에 미치는 효과를 살펴보는 것이다. 개인별 덕목이란 개인이 지닌 가치 있고 바람직한 핵심 특성을 의미한다. 부부 덕목이란 부부가 함께 공유하는 덕목을 의미한다. 한국인 부부 107쌍(남 107명, 여 107명)이 연구에 참여하였다. 축약판 개인 덕목 척도(Values in Action-Inventory of Strengths: VIA-IS), 개인 덕목 척도를 바탕으로 연구자가 문항을 재기술한 부부 덕목 척도, 부부의 전반적인 결혼 만족을 측정하기 위해 한국판 결혼만족도 검사 중 전반적 불만족 척도(K-MSI, General Dissatisfaction Scale: GDS)를 역채점한 척도가 사용되었다. 부부의 자료가 상호의존적인 특수한 관계임을 감안, APIM(Actor-Parter Interdependence Model) (Cook & Kenny, 2005; Kenny, Kashy, Cook, & Simpson, 2006)을 적용하였고 이를 구조방정식 모형을 통해 분석하였다. 그 결과, 개인 덕목 대비 더 다양한 부부 덕목이 결혼만족도에 영향을 미치는 것으로 나타났다. 끝으로 부부가 덕목을 개인적으로 지니기보다는 함께 공유하는 것의 중요성을 논의하였다.

• 인터넷정보학회논문지
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• 제17권2호
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• pp.87-95
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• 2016

본 연구는 선거캠페인 도구로써의 SNS 역할을 살펴보고자 2015년 4 29 재 보궐 선거 기간 동안의 정동영 후보와 변희재 후보의 SNS 상 메시지에 대한 내용 분석을 실시하였다. 본 연구의 결과로 첫째, 두 후보자의 SNS에 나타난 메시지의 내용적 측면을 분석한 결과 두 후보자 모두 '단순홍보'와 관련된 메시지를 가장 적극적으로 사용한 것으로 나타났다. 둘째, SNS상에 나타난 메시지의 목적을 베노이트(1999)가 제안한 설득적 전략방법에 따라 분석한 결과 두 후보자 모두'주장'의 전략을 가장 두드러지게 사용한 것으로 드러났다. 셋째, SNS상 메시지의 논제를 분석한 결과, 정동영 후보는 '인간적 특성'을, 변희재 후보는 '정책'에 관한 언급이 더 많은 것으로 나타났다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 지반공학 공동 학술발표회
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• pp.129-139
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• 2005

In this paper, the behaviors of tunnel damaged by fire, the diagnostic techniques for evaluating tunnel stability are presented. Also two fireproof construction methods are recommended. Three tunnels damaged by fire were analyzed to evaluate the structural stability. From the these analyzed, it is recommended that surface checking, rebound number of concrete by Schmidt Hammer, and carbonation of concrete are essential to evaluate the engineering properties of concrete in tunnel structure damaged by fire. On the basis of case studies of tunnel fire collected by ITA, the change of concrete and steel strengths by fire are explained, and numerical analysis, which was performed on culvert and circle tunnel, shows that distribution of temperature in the tunnel is dependant upon tunnel shape. Two fireproof construction methods using panel and punching metal are introduced to protect the tunnel by fire.

• The Journal of Asian Finance, Economics and Business
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• 제7권10호
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• pp.377-389
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• 2020

This research focuses on identifying and measuring key personality factors affecting the job performance of salesperson working in the machinery industry in Vietnam. A total number of 218 salesperson working in machinery industry were surveyed. After evaluating Cronbach's Alpha and using the regression analysis technique, the results show the impact level of personality trait factors affecting the job performance of salesperson working in machinery industry. Ordered from the highest to the lowest effects on job performance, these factors are: agreeableness, openness to experience, conscientiousness, extraversion, and neuroticism. Five research hypotheses are accepted. Specifically, openness to experience, conscientiousness, extraversion, and agreeableness have positive impacts on job performance of salesperson working in machinery industry in Vietnam. However, neuroticism has a negative impact on job performance of salesperson. This research results indicate the level of impact of personality traits on the sales staff performance in machinery industry. Many people apply to this profession as a career choice. Each occupation is suitable for certain personality trait, which changes very little during adulthood. Research also shows that each personality trait always has its strengths and weaknesses. The educational environment should create conditions for learners to develop their character in a natural way.

• International Journal of Advanced Culture Technology
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• 제7권4호
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• pp.145-155
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• 2019

The strength or resilience of refugees is a less emphasized area as the discourse in refugee mental health study mainly weighs on pathologizing the effects of refugee experiences. Within the lenses of strength and resilience, this study explored how refugees and asylum seekers, who experienced violence and loss, coped with trauma and hardship in their newly established lives in South Korea. In this study we analyzed survey data collected from 100 participants (55 asylum seekers and 45 refugees) through open-ended questions. We analyzed narratives for both content and form and provided evidence for factors that reflect coping strategies used by participants to overcome their life adversities. The findings gave rise to; (a) character traits like strong religiosity, personal determination, patience to forbear, hopefulness, and peaceful acceptance of current circumstance; (b) relationships, in the sense of meaningful strong bonds within family members and the instinctive personal resourcefulness to utilize support resources within and outside of their communities; (c) learned skills after migraing to korea; (d) knowledge sets in how to get by in korea; (e) personal talents, and (f) extra abilities that gave power to pass socio-economic difficulties. The findings underscore the importance of considering the strength-based approach either in discussing resilience or intervention. Our approach will allow practitioners to acknowledge that refugees and asylum seekers potentially have a unique set of strengths and abilities that they rely on to overcome their immediate and future problems. It will also guide practitioners as they devise their intervention schemes.

• 교육시설
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• 제16권1호
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• pp.69-77
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• 2009

This study, as one of the specific suggestions to satisfy the social needs of life long education and to overcome the limitations of the supply of regional facilities, presents plans for the possibility of the mixed-use of educational facilities and regional facilities as the ultimate objective. By focusing on the space composition of the mixed-use facility to execute the roles of the educational establishment actively and efficiently, the purpose is to present the mixed-use methodology in architectural plan on which functions to combine and by how much, when the mixed-use plan of educational facilities. The investigation objects was the 27 elementary schools in Seoul which have undergone mixed-use of educational facilities work as at August, 2007. And each educational facility was classified mixed-use functions and analyzed for the composition form of functions and the characteristics by functions. And for mixed-use facility, form types were derived from the relationship with the school buildings through the analysis on characteristics, strengths and weaknesses of each types were presented by factor-by-factor plan directions of mixed-use facility.

• 대한금속재료학회지
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• 제49권8호
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• pp.649-656
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• 2011

The present study evaluated the microstructures and mechanical properties of severely deformed Ni-30Cr alloys. Cross-roll rolling (CRR) process was introduced as a severe plastic deformation (SPD), and Ni-30Cr alloy sheets were cold rolled to 90% thickness reduction and subsequently annealed at $700^{\circ}C$ for 30 min to obtain the recrystallized microstructure. Electron back-scattering diffraction (EBSD) was introduced to analyze grain boundary character distributions (GBCDs). The application of CRR to the Ni-30Cr alloy was effective in enhancing the grain refinement through heat treatment; consequently, the average grain size was significantly refined from $33{\mu}m$ in the initial material to $0.6{\mu}m$. This grain refinement directly improved the mechanical properties, in which yield and tensile strengths significantly increased relative to those of the initial material. We systematically discuss the grain refinement and accompanying improvement of the mechanical properties, in terms of the effective strain imposed by CRR relative to conventional rolling (CR).