• 한국안전학회지
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• 제9권1호
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• pp.110-120
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• 1994

The Quantitative analysis for collapsion probability of each construcion work has not been developed, despite of that the one for safety management itself has been reported, up to now. It is concluded that showing critical check points against structure collapsion due to each work at construction site, and Quantifying those could be useful Quality-assuring tool, not to prevent Quality failure. Risk classes of each work at construction site, classified by German Builders Mutual-Aid Association (GEBMAS), and by special instruction rates of Korea Insurance Development Institute, are introduced to compare with the results of this study. As of a study method, total 2,002 sheets of questionwares are distributed directly to new city development areas, which are called, Ilsan 110 points : Pundang 79points and Chungdong 38points, including additional Changwon 125sheets and pusan 60sheets, by four(4) people, for contact with actual site engineers. Total responses of 1,056 sheets, are collected. Interrelationship diagram between experience years of Engrs., and risk rate of responses are also classified, with the criteria of four(4) years. Domestic journals with relation to construction have reported that main building Structure collapsions are mainly shown on apartment buildings and office ones. These two(2) building structures are again classified as five(5) kinds of works. This study takes use of an approach on haying the risk rates for each construction work on the above individual construction work. Additionally, site investigations have been performed to find out any possible unreasonable check items, due to construction method ; Reinforced Concret structure, Pre cast Concrete structure, and Steel structure building. Developed Quality Assurance Analysis Form with the Quantitative danger class, resulted from this study, are verified as it is able to be a good efficiency tool against collapsion of building structures.

• 한국소음진동공학회논문집
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• 제22권12호
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• pp.1227-1236
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• 2012

The low speed machinery faults are usually caused by the bearing failure of the rolling elements. As the life time of the bearing is limited, the condition monitoring of bearing is very important to maintain the continuous operation without failures. A few monitoring techniques using time domain, frequency domain and fuzzy neural network vibration analysis are introduced to detect and diagnose the faults of the low speed machinery. This paper presents a method of fault detection for the rolling element bearing in the low speed machinery using the Wiener filtering and shock pulse counting techniques. Wiener filter is used for noise cancellation and it clearly makes the shock pulse emerge from the time signal with the high level of noise. The shock pulse counting is used to determine the various faults obviously from the shock signal with transient pulses not related with the bearing fault. Machine fault simulator is used for the experimental measurement in order to verify this technique is the powerful tool for the low speed machine compared with the frequency analysis. The test results show that the method proposed is very effective parameter even for the signal with high contaminated noise, speed variation and very low energy. The presented method shows the optimal tool for the condition monitoring purpose to detect the various bearing fault with high accuracy.

• Nutrition Research and Practice
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• 제10권4호
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• pp.404-410
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• 2016

BACKGROUND/OBJECTIVE: Malnutrition and inflammation are reported as the most powerful predictors of mortality and morbidity in hemodialysis (HD) patients. Diet has a key role in modulating inflammation and dietary inflammatory index (DII) is a new tool for assessment of inflammatory potential of diet. The aim of this study was to evaluate the application of DII on dietary intake of HD patients and examine the associations between DII and malnutrition-inflammation markers. SUBJECTS/METHODS: A total of 105 subjects were recruited for this cross-sectional study. Anthropometric measurements, 3-day dietary recall, and pre-dialysis biochemical parameters were recorded for each subject. Subjective global assessment (SGA), which was previously validated for HD patients, and malnutrition inflammation score (MIS) were used for the diagnosis of protein energy wasting. DII was calculated according to average of 3-day dietary recall data. RESULTS: DII showed significant correlation with reliable malnutrition and inflammation indicators including SGA (r = 0.28, P < 0.01), MIS (r = 0.28, P < 0.01), and serum C-reactive protein (CRP) (r = 0.35, P < 0.001) in HD patients. When the study population was divided into three subgroups according to their DII score, significant increasing trends across the tertiles of DII were observed for SGA score (P = 0.035), serum CRP (P = 0.001), dietary energy (P < 0.001), total fat (P < 0.001), saturated fatty acids (P < 0.001), polyunsaturated fatty acids (P = 0.006), and omega-6 fatty acids (P = 0.01) intakes. CONCLUSION: This study shows that DII is a good tool for assessing the overall inflammatory potential of diet in HD patients.

• 과학기술학연구
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• 제8권2호
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• pp.57-81
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• 2008

이 글은 지속 가능한 기술을 위한 정책적 도구로서 전략적 니치관리(Strategic Niche Management)를 개괄하고, 그 효용과 한계를 점검하고 있다. 전통적인 접근인 시장실패론적 접근과는 달리 전략적 니치관리의 접근은 시스템적 접근으로서, 다층적 관점(Multi Level Perspective)를 통해 기술혁신과 변화를 재분석해내고, 고착화된 사회 기술시스템의 전환을 이룩해내기 위한 방법론이다. 전략적 니치관리의 이론적, 경험적 미성숙에도 불구하고, 전략적 니치관리는 기술혁신과 발전에 대한 분석 틀로서 뿐만 아니라, 급진적 혁신을 만들어 낼 수 있는 도구로서의 가치가 주목된다. 노령화 사회에 대비한 혁신정책 및 지속가능한 에너지 시스템 구축을 위한 혁신정책, 위험사회에 대응한 혁신정책들이 새로운 혁신정책의 영역으로 부상하고 있는 상황에서 전략적 니치관리는 이들 분야에서 중요한 분석 및 실천도구로 활용되며 새로운 영역을 개척할 수 있을 것으로 기대된다.

• 한국기계가공학회지
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• 제15권4호
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• pp.51-59
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• 2016

Measurements of the automobile manufacturers are available anywhere and anytime, directly based on the criterion of failure is measured. The maintenance of high-precision production activities is direct evidence of the fact that competitive manufacturing activities are very important in determining the success of companies to recall defective starting from raw material costs. The current manufacturing sites produce calipers and clearance gauge the degree of tool only specific. Therefore, judging the quality, including the number of errors, requires a lot of attention to the dimension failures in day-to-day measurements and measurement tasks and duties repeated in difficult situations. In this paper, we aim to develop a vehicle manufacturing plant site using each of the manufacturing processes while operating a measurement tool. We display it using the Image Processing PC-based S/W with all those visual facts by management and recorded as image information a more accurate and current situation to obtain information and share visual measurements. We carry out research on the design and development vision inspection algorithm applied for pattern-recognition techniques that can help manufacturing site quality control.

• 한국산학기술학회논문지
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• 제17권8호
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• pp.379-388
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• 2016

현대 무기체계 제조를 위해 적용되는 수많은 생산 기술과 다양한 공정 환경으로 인해 다양한 결함이 무기체계 제조공정에 유입되고 있다. 이렇게 제조공정에 유입되는 결함 중 육안 검사, 기능 시험 등 기존 품질 관리 절차를 통해 검출할 수 있는 "명백결함(Patent Defect)"과 무기체계 복잡성과 제조공정의 복잡도로 기존 품질 관리 방식으로 검출이 제한되는 "잠재결함(Latent Defect)" 2가지 종류가 있다. 이러한 초기 결함 문제를 최소화하기 위해 무기체계 생산공정 중 유입된 결함요소를 환경부하(온도, 진동)를 활용하여 결함검출/제거/개선하기 위해 환경 부하 선별(ESS : Environmental Stress Screening) 시험을 수행해야 한다. 본 논문은 국내 무기체계 제조업체에서 정량적 환경 부하 선별 시험 설계의 어려움을 최소화하기 위해 MIL-HDBK-344(Environmental Stress Screening of Electronic Equipment)의 수학적 모델을 기반으로 정량적 환경 부하 선별시험 효과도 분석 및 프로파일 자동화 도구를 구현하였으며, 6가지(온도부하변수 3가지(온도범위/온도변화율/허용 잔류결함밀도), 진동부하변수 2가지(부하크기/허용 잔류결함밀도), 시험설계변수 1가지(허용 시험시간)) 시나리오를 통해 구현된 도구 유효성을 확인했다.

• 한국동물위생학회지
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• 제31권4호
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• pp.533-546
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• 2008

The efficacy of bovine immune sera to correct the calves with failure of passive transfer(FPT) was evaluated. Immune sera were produced from 14 one-year-old Holstein cattle which were inoculated commercial combined viral vaccine, administered by the challenge of some main enteric or respiratory viruses, aseptically filtered and stored at $4^{\circ}C$ before used. After the treatment of bovine immune sera, Mean transfer factor($mg/d{\ell}$, of IgG administered/kg of body weight) was $5.46{\pm}2.74,\;11.17{\pm}1.27,\;1.40{\pm}0.21$ in K-IP, H-IP and K-IV group, respectively. The corrective effect of bovine immune sera to FPT calf without any clinical signs showed that intravenous route was more effective than intraperitoneal administration(P<0.01). FPT calves with severe signs were not effective response to the immunotherapy used and consequently died within 10 days after the treatment. Ten percentage of controls appeared the clinical signs including diarrhea. On the contrary, there were not any clinical signs in K-IP and H-IV group. There was significant increase of the neutralizing titer against bovine viral diarrhea virus and bovine coronavirus as well as of cell population including CD2, CD4, and monocyte in K-IP and H-IV group after the immunotherapy(P<0.05). Also, K-IP and H-IV group showed the successful correction to FPT within one week after the immunotherapy, but controls had kept the FPT two-four weeks even after the same treatment. Consequently, the results were suggesting that the bovine immune sera could be used the corrective tool to young calves with FPT.

• 문화기술의 융합
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• 제9권1호
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• pp.539-544
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• 2023

연구 대상은 경상북도 ◯◯시 ◯◯동에 위치한 마애여래입상 암반으로서 안정성이 우려되는 중생대 백악기 화강섬록암 마애불상이다. 안정성 해석을 위해 마애불 암반의 3차원 face mapping과 절리의 지질공학적 특성, 3차원 스캐닝, 초음파속도, 편광현미경 분석, 전자현미경 분석 및 XRD 분석을 수행하였다. 더불어 손상상태 조사, 평사투영해석, 암반분류 및 한계평형해석으로 마애불 암반의 안전율을 산정하였다. 구간별로 손상 및 가능한 붕괴의 유형과 규모는 암석의 풍화도와 절리면의 배향과 특성에 따라 다르나 쐐기파괴와 전도파괴가 소규모로 예상된다. face-mapping 자료, RMR, 암석의 물성·역학시험, 평사투영해석 및 한계평형해석으로 종합·검토한 결과, 마애불 암반의 건기 시와 우기 시의 허용안전율 1.2에 미달하여 안정성이 우려된다. 손상유형은 박리, 균열, 입상분해 및 초목생장, 균열 방향별 점유율은 전면이 가장 우세한 것으로 나타난다. 마애불 암석은 화강섬록암이며, 표면 변색의 물질은 K, Fe, Mg로 판명되었고, 4조의 절리 중 J1은 인장절리이고 나머지는 전단절리이다. 초음파탐사로 추정한 일축압축강도는 514kgf/cm2로서 대부분 연암과 일부 풍화암에 해당한다. 암반분류 결과 5등급으로 추산되며, 마애여래입상 전면부 불안정성이 예상된다. 기존의 문화재 안전진단의 방법과 더불어 이들 기법은 석조문화재의 객관적인 해석 및 안정성 검토의 합리적인 도구가 될 것으로 예상한다.

• 무역상무연구
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• 제39권
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• pp.105-142
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• 2008

For many companies, selling in an international market place is the ultimate challenge. One of the greatest problems facing exporters is the increasing insistence by importers that trade be conducted on open account terms. This often means that payment is received many weeks or even months after delivery. Unsurprisingly, many organisations find that giving buyers credit in this way can cause severe cash flow problems. Further problems can arise if the importer delays payment beyond originally agreed terms or makes no payment at all because of financial failure. In particular, many SMEs find it difficult to finance their production cycle, since after goods are delivered most buyers demand 30 to 90 days to pay. Therefore, International factoring for SME has been developing very rapidly in the world trade financing markets. Functions of international factoring as trade financing is a comprehensive financial service that includes credit protection, accounts receivable bookkeeping, collection services and financing. Factoring can be a powerful tool in providing financing to high-risk, informationally opaque sellers. International factoring is very helpful for international exporters to get competitiveness in the world markets. In Korea, a few banks are operating international factoring. But International factoring in Korea could not play a key roll as general trade supporting service. So, This study is to suggest importances of international factoring development for trade development and to investigate real operation situations and problems by way of interviews with operators in banks that are operating international factoring and suggest development strategies for international factoring in Korea.

• 인터넷정보학회논문지
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• 제17권5호
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• pp.25-32
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• 2016

There has been a rapid growth in the development of mobile application resulting from its wide usage for online transaction, data storage and exchange of information. However, an important issue that has been overlooked is the lack of emphasis on the security issues at the early stage of the development. In fact, security issues have been kept until the later stage of the implementation of mobile apps. Requirements engineers frequently ignore and incorrectly elicit security related requirements at the early stage of mobile application development. This scenario has led to the failure of developing secure and safe mobile application based on the needs of the users. As such, this paper intends to provide further understanding of the real challenges in extracting security attributes for mobile application faced by novice requirements engineers. For this purpose, two experiments on eliciting security attributes requirements of textual requirements scenario were conducted. The performance related to the correctness and time taken to elicit the security attributes were measured and recorded. It was found that the process of eliciting correct security attributes for mobile application requires effort, knowledge and skills. The findings indicate that an automated tool for correct elicitation security attributes requirement could help to overcome the challenges in eliciting security attributes requirements, especially among novice requirements engineers.