Austenitic oxide-dispersion-strengthened (ODS) stainless steel was fabricated using a wet mixing process without a mechanical milling in order to reduce contaminations of impurities during their fabrication process. Solution of yttrium nitrate was dried after a wet mixing with 316L stainless steel powder. Carbon and oxygen contents were effectively reduced by this wet processing. Microstructural analysis showed that coarse yttrium silicates of about 150 nm were formed in austenitic ODS steels with a silicon content of about 0.8 wt%. Wet-processed austenitic ODS steel without silicon showed higher yield strength by the presence of finer oxide of about 20 nm.

This paper investigates tensile characteristics of the stress aging heat-treated SM45C steel which are aging temperature at 250℃, 300℃, aging time at 1, 3 hours, and applied load at 300, 400N conditions by using acoustic emission. Most suitable aging condition was aging temperature 300℃, aging time 1 hour, and aging applied load 300N. And increased yield load 28.3% than non-treatment specimen in this condition. AE energy in elastic limit increased about 16.7 times than non-treatment specimen. When aging time is 3 hours, yield load decreased than other conditions that possibility is high to have itself defect on inside the specimen or coarse grain size precipitation is different in happened over-aging phenomenon. Especially, in case of 300℃, 3 hours and 400N condition appeared AE energy in elastic limit fairly high about 30 times than non-treatment specimen. This is considered by emit a lot of energies when material causes plastic deformation because the ductility increases on specimen by over-aging phenomenon.

The present management of the domestic and international advanced enterprises is transferring the systems and the regulations to the prevention system management. Expecially, KOSHA (Korea Occupational Safety & Health Agency) in Korea has supported to set up the OSHMS (Occupational Safety & Health Management System) by KOSHA 18001 since 1997. But small & medium enterprises (SMS) has many difficulties to set up the OSHMS system because of limited natural and human resources. In this study, the rating system as a judgment method of an OSHMS based on the certification standard of the OSHMS was suggested for SMS to adopt voluntarily the OSHMS, certify KOSHA 18001, and improve the safety and health level.

The effort for GSI based IT system consolidation has been continued due to the increase of the system and complication increase of system connection, mainly by the global company. Since successful example of GSI realization by part of developed company affect to Korea, global level IT system consolidation has been examined mainly by the domestic company that have great deal of overseas business. Although they have examined consolidation possibility mainly on R&D, finance, operation management part which is the base part of company management, there are limitation for consolidation realization because of the difference between regional business problem of huge cost needed for consolidation. To overcome these realization limitations, it is necessary to lead risk and cost reduction through stepwise part unity and decide Priority Evaluation Framework for Consolidation target and systematic consolidation strategy. For GSI realization, appropriate distributions of unification time according to target system are needed. In this study, based on easiness and usefulness of consolidation and connection between the targets, evaluation methodology for Priority Evaluation Framework of system consolidation has been developed. Priority Evaluation Framework has been decided by applying developed methodology to global production company of high tech industrial part. Through this methodology, companies can realize successful and stable GSI by investing global resources intensively by Priority Evaluation Framework of consolidation target system

Product liability as a process has developed significantly in the United Kingdom and the United States of America. The rapid introduction of product liability has recently been a prevalent phenomenon, as global changes arising from rapid development in science and the economy have resulted in a highly interconnected world economy. This thesis was established, based on current literature and business consulting cases in the position of companies, and is one of the operating subjects in a system for legal responsibility in manufactured products.

본 연구의 목적은 TV 화질에 대한 사용자들의 심리적 특성을 평가하기 위한 화질평가척도를 개발하고, TV 화질의 심리 특성과 물리적 특성의 관계를 확인하는 것이다. TV 화질과 관련된 형용사 152개 중 집단설문(남녀 대학생 80명)을 통하여 TV 화질을 잘 표현하는 형용사로 19개의 형용사를 선정하였다. 선정된 형용사는 다음과 같다; '깔끔하다-지저분하다', '깨끗하다-더럽다', '산뜻하다-침울하다', '편안하다-긴장된다', '매끄럽다-거칠다', '밝다-어둡다', '화려하다-수수하다', '변화스럽다-단조롭다', '자연스럽다', '감각적이다', '만족스럽다'. 126명의 남녀 대학생을 대상으로 이들 형용사의 유사성 평정을 실시하고, 유사성 점수에 대하여 요인분석(주성분분석, oblique 회전)을 실시한 결과, '깔끔함' 차원과 '화려함' 차원으로 분류되었다. 그리고 31명의 남녀 대학생을 대상으로 TV 화질에 대한 감성과 물리적 특성과의 관계를 확인하였다. 그 결과 TV 화질에 대한 감성 형용사들은 밝기, 명암, 색농도와 색상의 변화에는 민감하였으나, 선명도의 변화에는 민감하지 않은 것으로 나타났다.

본 연구는 6개월 혹은 1년 과정의 정예직업훈련을 이수한 259명 성인남성 수형자들을 대상으로 그들의 만족도와 내적변화를 살펴보고, 어떤 요인들이 만족도와 변화에 영향을 주는지 찾아보았다. 구체적으로, 직업훈련프로그램을 구성하는 기술교육, 사회적응교육, 종교 활동의 3개 영역과 훈련교사 및 동료에 대한 만족의 정도를 측정했다. 나아가 인구사회학 및 범죄관련 변수들과 성취동기, 응집력 변인들을 기초로 훈련생들의 만족도와 관련된 요소들을 조사했다. 또 사전․사후 검사를 실시하여 훈련기간 동안 수형자들의 도덕적 가치관, 자기의식, 자존감, 사회적 지지, 충동적 비순응성에 변화가 있었는지 분석했다. 끝으로 훈련생들의 가치관과 심리정서 및 행동의 변화량에 영향을 미치는 요인이 무엇인지 확인하였다. 훈련생들은 직업기술을 가르치는 교사에게 가장 높은 만족도를 표시했다. 기술교육의 내용과 공과 동료, 종교 활동이 그 뒤를 이었고, 사회적응교육에 대한 만족도가 가장 낮았다. 수형자들의 만족도에 가장 큰 영향력을 행사하고 있는 요인은 집단응집력이었다. 그 다음으로 개인적 특성에 속하는 종교, 연령, 성취동기가 직업훈련에 대한 만족수준을 결정하고 있었다. 대응비교 t검증에 의하면, 수형자들의 도덕적 가치관, 자기의식, 자존감, 사회적 지지는 긍정적으로 유의미하게 향상되었다. 그러나 충동적 비순응성에서는 차이가 없었다. 다중회귀분석의 결과를 요약하면 다음과 같다. 도덕적 가치관의 변화량에 영향을 주는 요인은 발견되지 않았다. 자기의식에 대한 변화에는 집단응집력과 배우자 유무가 관련되어 있었다. 집단응집력과 가족응집력은 남성들의 자존감을 높이고 충동성을 낮추는 역할을 하고 있다. 사회적 지지의 변화수치에 영향을 주는 요인은 집단응집력과 형기인 것으로 확인되었다.

Designers have to consider voice of customer, process capability, manufacturing standards & condition, manufacturing method and characteristics of products to decide tolerances. Especially, in case of position of hole and pin, designers have to consider process capability to decide tolerances. The traditional position tolerances used in a drawing are theoretical values which are allocated to position under the worst case assembling condition that both hole and pin are the maximum material condition(MMC). However, when the process capability is high, more exact product size can be produced under stable manufacturing condition. Larger clearance of hole and pin can be allocated. In this point of view, manufacturer could increase the yield by allocating larger position tolerance than theoretical position tolerance of hole and pin considering process capability.

We investigated optometric aspects of advanced health service system of the American Forces, considering necessity of sirnilar system for the Korean Armed Forces. The U. S. military optometric service system was investigated on the basis of open materials given by the American Army, Navy and Air Force, focusing on military optometrist and optical laboratory specialist positions. We compared the results of investigation with present status of optometric servicets of the Korean Armed Forces. The American Forces have an advanced optometric service system managed by the military optometrists. who are similar with the military medical officers. and optical laboratory specialists, who are considered as expert groups. The U. S. military offers soldiers eye test and optometric services of very high quality, while the optometric service of the Korean Armed Forces is very limited and much improvement is required for better eye health and visual care. We think that it is necessary to introduce an optometric specialist position to the Korean military organization for better cornbat capability.

Human emotion is a point to communicate each other. we applied human emotion to make computer interface. In this paper, we have researched the next generation interface technology "Bio Feedback system" which enabled us to estimate an emotional state of human being and so we applied it to embody ‘NPC’ using "Reinforcement Learning Algorithm" which is able to respond appropriately to human being’s emotions.

최근 선박건조기술이 발전했음에도 불구하고 교통량의 증가와 해양레저의 활성화로 사고위험은 더욱 증가하고 있다. 이 논문에서는 그동안 발생했던 해양사고를 분석하여 사고발생을 최소화할 수 있는 여러 가지 방안과 사고발생시 신속하고 구조할 수 있는 체계적인 구조시스템에 대하여 논의한다. 선박이 해상에서 안전하게 항행하기 위해서는 선박기술, 항해관련 장비, 우수한 인적자원, 교통관제 등과 같은 구성요소들이 제도적으로는 구축되어야 하고, 각각의 항행요소들이 유기적으로 작동되어야 한다. 또한 사고발생시 사고수습이 신속하게 진행될 수 있도록 체계적으로 정부조직이 구성되어야 하고 그 조직들이 긴밀한 협력관계를 유지해야 한다. 민간부분에서의 협력지원도 현재보다 더욱 강화되어 국가의 관리영역에서 벗어난 해역에서는 민간부분에서 구조할 수 있도록 민간 구조대가 활성화되어야 한다.

In an effort to evaluate the currents in pesticide residues, 3,020 agricultural products were tested by multiresidue method with 260 pesticides, obtained from the circulation market of in the Gangbuk province in 2007.20.4%(616/3020) of the products were determined to contain pesticides residues, but only 4.1%(124/3020) of these were deemed to be unsuitable by the korea Food Code. Unsuitably products were spinach(21.0%), perilla leaf(17.3%), ulgari(13.6%), leek(12.4%), crowndaisy(12.4%), asterscaber(12.4%), chard(11.1%). Detected pesticides were procymidone(3.9%), endosulfan(2.6%), chlorfenapyr(2.2%), bifenthrin (1.3%), cypermethrin(0.7%), metalaxyl( 0.9%), azoxystrobin(0.3%) and chlorothalonil(0.7%). Sixty-four pesticides were detected and 11 pesticides were newly detected in 2007. Thirty-one pesticides in agricultural products exceeded their MRLs.

A study of fracture to material is getting interest in nuclear and aerospace industry as a viewpoint of safety. Acoustic emission (AE) is a non-destructive testing and new technology to evaluate safety on structures. In previous research continuously, all tensile tests on the pre-defected coupons were performed using the universal testing machine, which machine crosshead was move at a constant speed of 5mm/min. This study is to evaluate an AE source characterization of SM45C steel by using k-nearest neighbor classifier, k-NNC. For this, we used K-means clustering as an unsupervised learning method for obtained multi -variate AE main data sets, and we applied k-NNC as a supervised learning pattern recognition algorithm for obtained multi-variate AE working data sets. As a result, the criteria of Wilk's λ, D&B(Rij) & Tou are discussed.

Set within theoretical frameworks combining knowledge based capability approach and transaction cost theory of a firm's innovative outsourcing strategy, the present paper empirically analyzes game developer's out-sourcing factors. The factor analysis shows that knowledge transfer of high-tech technology is not easily accomplished. Efficient out-sourcing requires effective interaction capabilities between game engine supplier and game developer. For the effective game developer's out-sourcing, game developer's absorptive capability is needed to collaborate with game engine supplier's user-friendliness of game engine regime and supporting capability. The result also show that knowledge based factors and transaction cost factors are closely related each other. Knowledge based factors reduces transaction cost and vice versa.

본 연구에서는 동계에 한랭 건조한 대륙성 기단이 서해를 통과할 때 서해 연안지역인 인천, 군산, 목포의 적설량과 해양기상요소와의 관련성에 대하여 조사하였다. 한반도 서해 연안지역인 인천, 군산, 목포의 동계(12월～2월) 평균 적설량은 군산이 12.7cm로 가장 많았으며, 목포(9.0cm), 인천(7.8cm) 순으로 나타났다. 특히, 세 지역에서 적설량은 12월과 2월에 지역적인 차이를 나타내었다. 이와 같은 지역적인 적설량의 차이는 대륙성 고기압의 확장과 관계하였다. 대륙성고기압은 12월에 중국 화남지방에 중심을 두고 산동반도 및 한반도 서부연안지역을 통과하고, 1월에는 중국 화북지방에서 한반도 중부지방으로 확장하며, 2월에는 중국의 북쪽지방에서 발해만과 요동반도를 통과하여 한반도의 중부지방으로 확장하였다. 이 대륙성고기압의 확장과 관련하여 인천은 적설이 2월이 12월보다 많았고, 군산과 목포는 12월이 2월보다 많은 적설을 나타내었다. 세 지역에서 대설은 열손실이 100 w/m2 이상일 때 나타났다. 또한, 대설은 대륙성 고기압과 저기압의 배치가 서부지역에 전선이 형성되는 서고동저형일 때 발생하였고, 이때 바람은 4-8m/sec 세기의 북서풍 또는 북풍이 우세하였다.