• International Journal of Railway
• /
• 제1권3호
• /
• pp.83-88
• /
• 2008

Since the 1990's the fleet of the Dutch Railways showed a dramatic decrease in wheel tyre life. This lifetime reduction led to an unacceptable increase in life cycle costs. Therefore Lloyd's Register Rail has proposed to NedTrain to investigate the possibilities of improving the wheel tyre life. Three improvements were determined as most promising and relatively easy to achieve: - Profile optimisation for Rolling Contact Fatigue (RCF) reduction - a new wheel profile has been developed with a better resistance against rolling contact fatigue of the wheel tread. The profile has been implemented on single deck intercity trains and shows an increase in wheel tyre life of 30%. - Selection of improved wheel tyre materials - combining information from literature and experiences of manufacturers five alternative wheel tyre materials have been selected and are now being tested in practice. - Optimisation of the maintenance strategy - an alternative, preventative maintenance regime has been developed. With this Scraping regime, during short term maintenance every wheel is reprofiled. Higher mileages are reached and savings on life cycle costs up to 50% and more have been achieved. Unplanned maintenance goes down with $30{\sim}60%$. The results from field tests, using a reference group for comparison, and preliminary results after implementation show that the increase in wheel tyre life that is achieved with this project is significant. The results will continue to be monitored using the asset management tool 'Wheel Watch', that was specially developed for this project and is also described in this paper.

• 한국정보과학회논문지:시스템및이론
• /
• 제37권5호
• /
• pp.285-291
• /
• 2010

플래시 메모리는 하드 디스크에 비해 크기가 작고 물리적 충격에 강하며 전력 소모가 적은 점 등 많은 장점을 가지고 있지만 아직까지 단위 공간당 가격이 높아 하드 디스크를 전면 대체하기는 어려운 실정이다. 최근 노트북 컴퓨터 동 일부 모바일 장치에서는 하드 디스크와 플래시 메모리를 함께 사용하여 두 매체의 장점을 극대화하려는 시도가 이루어지고 있다. 하지만 기존 운영체제는 이기종 저장 장치 환경이 아닌 단일 저장 장치 환경에 최적화되어 이러한 장점을 충분히 살리지 못하고 있다. 본 논문에서는 이를 해결하기 위해 세 가지 기법을 이용하는 새로운 버퍼 캐시 관리 기법을 제안한다. 첫째, 입출력 접근 패턴을 탐지하고 블록의 저장 위치 별 성능 특성을 분석한 후 동적 한계 효용에 근거하여 버퍼 캐시 공간을 할당한다. 둘째, 입출력 접근 패턴과 저장 장치 특성에 따라서 선택적으로 선반입 기법을 적용한다. 셋째, 버퍼 캐시에서 저장 장치로 쫓겨날 때 해당 블록의 접근 패턴에 따라 하드 디스크와 플래시 메모리 중 더 적합한 매체를 결정하고 그 매체에 블록이 저장되도록 한다. 제안하는 기법들을 트레이스 기반 시뮬레이션으로 검증한 결과 기존 기법에 비해 버퍼 캐시 적중률은 29.9%, 총 실행시간은 49.5% 향상되었다.

• 한국유기농업학회지
• /
• 제19권spc호
• /
• pp.119-122
• /
• 2011

Among the developed bio-degradable polymer films as compared with transparent film(White), black polymer film was significantly more effective for controlling weeds in red pepper. Also, we found that white and black polymer mulching had 81.8% and 97.9% of managing weed controlling effects in rice, respectively. Compared to non-mulched rice paddy with water supply, the non-mulched rice paddy without any water supply has stopped its growth at 41 days after transplanting, while polymer-mulched rice paddy without water supply had about 60% of normally growing rice plants. This shows the polymer treatment has a remarkable effect on water and power saving, solution of herbicidal resistance, avoidance of herbicidal influence to eco-system etc. When the naturally decomposing polymer was used, a temperature was elevated as high as $4.7^{\circ}C$ on maximum and $2.6^{\circ}C$ on average. Also the naturally decomposing polymer accelerated rooting by 7 days and lowered a stress level from transplanting. The weed control effect mulched by polymer was remarkable as 98.7%. The polymer now, after 294 days treated on the rice paddy, has been completely decomposed.

• 보건행정학회지
• /
• 제31권4호
• /
• pp.387-398
• /
• 2021

Moon Jae-in Care can be seen as a 2.0 version of Roh Moo-Hyun Care. Just as Roh Care failed to achieve its coverage rate goal and 30% share of public beds, Moon Care also failed to achieve its expected goal. The reason is that it followed Roh Care's failed strategy. Failure to control non-covered services has led to a long way to achieve a 70% coverage rate and induced the expansion of voluntary indemnity insurance, resulting in increased public burden. The universal coverage of non-covered services caused an immediate backlash from doctors. And Moon government also failed to control the private insurance market. The expansion of publicly owned beds has not become realized and has not obtained public support. Above all, it failed to overcome the resistance of doctors and failed to obtain consent from budget power groups in the cabinet for public investment. It was also insufficient to win the support of civic groups. Communication with interested groups failed and the role of private health care providers was neglected. The next government should also continue to strengthen health care coverage, but it should prioritize preventing medical poor and create a consensus with both medical providers and consumers for the control of non-covered services. Ahead of the super-aged society, the establishment of linkage between medical services and long-term care and visiting health care or welfare services is an important task. All public and private provisions and resources should be utilized in the view of a comprehensive public health perspective, and public investment should be input in sectors where public medical institutions can perform more effective functions. The next government, which will be launched in 2022, should design a new paradigm for health care in the face of a period of transformation, such as the coming super-aged society in 2026 and the Fourth Industrial Revolution, and recognize that the capabilities of the health care system represent the nation's overall capacity.

• 디지털융복합연구
• /
• 제17권9호
• /
• pp.31-37
• /
• 2019

본 연구결과는 선행연구와 같이 피해자의 작업동기 상실, 조직 불신, 신경과민, 이직의도 증가, 좌절감, 스트레스와 감응저항, 무력감과 소외감을 나타냈다. 노동조합이라는 집단의 부정적인 힘에 눌려 일개 개인이 대항하거나 해결책을 찾을 수 없는 현실에 분노를 경험하였다. 또한 노조의 집단 따돌림에 대한 조합원의 두려움이라는 심리적 요인들이 파업에 합류하지 않은 노조원, 노조에 미가입한 근로자들에게 압력요소로 작용하여 기존 노동조합 노조원의 이탈을 방지하는데 영향을 미치는 것으로 나타났다. 노동조합의 집단따돌림 행동이 비록 집단의 목적을 달성하는데 효과가 있다고 하더라도 윤리적이어야 할 조직이 윤리적으로 벗어나는 모습을 보인다는 점에서 집단따돌림 행동이 타당한가에 대한 문제를 고려해 볼 필요가 있다.

• 치위생과학회지
• /
• 제22권1호
• /
• pp.1-8
• /
• 2022

Background: The elderly have, a higher disease morbidity than other age groups due to a decrease in resistance to the disease and have complex diseases, so care should be taken. Accordingly, it is considered important to provide information for improving the health of the elderly. Health information plays an important role in individual health promotion and education, so the degree of exposure to information about oral health of the elderly is expected to have a significant impact on understanding and acquiring information on oral content videos on the importance, prevention, and management of oral health of the elderly in the future. Methods: This study analyzed video content related to oral diseases of the elderly in a total of 150 videos uploaded on YouTube from January 1, 2012 to May 13, 2021, using a total of three books of dental hygiene for the elderly. Results: Forty-nine broadcasters accounted for the most of this information. Among the information providers, there were two dental hygienists. They accounted for 1.3% of all the information providers. The highest number of dental hygienists who broadcasted information was 42 in 2019. The average number of views was 37,303 periodontal diseases, the highest. Among the videos, dry mouth was the most common with 34 oral diseases. Conclusion: The number of images for each disease varies, so it seems that information should be provided in various ways. Dental hygienists should widely improve oral health knowledge by providing various dental hygiene management images for each oral disease to improve the oral health of the general public. In addition, based on the information of the Health Insurance Review and Assessment Service, the development and provision of content should be actively carried out so that people can obtain the information they desire.

• 한국프랜차이즈경영연구
• /
• 제3권2호
• /
• pp.79-102
• /
• 2012

본 연구는 대형마트, 기업 형 슈퍼마켓 (SSM) 에 대한 출점 및 영업규제를 2009년 이전과 2009년 이후로 구분하여 연구하였다. 대형마트, 기업 형 슈퍼마켓 입장에서 영업 및 출점규제 법률시행에 따른 향후영향 및 대응 방안과 대안을 제시 하고자한다. 특히 2009년 이후 기업 형 슈퍼마켓의 출점 증가로 중소상인 보호를 위하여 유통법이 개정되어 출점과 영업규제 법률이 통과되고 조례제정을 통하여 규제가 현실화되었다. 이러한 법 개정이 외국사례와 국제법과 비교해서 그 타당성의 여부를 확인하고 향후방향을 제시했으며 실질적인 영세 상인임에도 오히려 과잉규제 대상이 된 프랜차이즈 슈퍼마켓 가맹점의 선의에 피해에 대한 법률적 구제방안도 제안하고자 한다. 본격적인 규제시행으로 유통업계는 해외진출 가속화, 유통업자 상표개발확대, 해외소싱상품 개발 등 경쟁력 강화를 위한 방안을 강구하고 중소상인과 대기업간의 상생모델인 프랜차이즈 가맹사업으로 사업방향을 전환하여 실질적인 상생협업모델을 추진하고 상생협력도 구축하면서 지속적인 성장을 추구해야한다.

• 문화기술의 융합
• /
• 제9권5호
• /
• pp.569-582
• /
• 2023

납축전지는 가장 오래된 충전식 배터리 시스템으로 현재까지 충전식 배터리 분야에서 자리를 지키고 있다. 이 배터리는 다양한 이유로 열폭주 현상이 생기는데 이는 큰 사고로 이어질 가능성이 있다. 그렇기 때문에 열폭주 현상을 예방하는 것은 배터리 관리 시스템의 핵심부분이다. 최근에는 열폭주 위험 배터리 셀을 기계학습으로분류하는 연구가 진행 중이다. 본 논문에서는 비지도학습인 DBSCAN 클러스터링과 통계적 방법을 사용하여 열폭주 위험 셀 탐지 및 검증 알고리즘을 제안하였다. BMS에서 측정한 lead-acid 배터리의 저항 값만을 사용하여 열폭주 위험 셀 분류 실험을 진행하였고 본 논문에서 제안한 알고리즘이 열폭주 위험 셀을 정확히 검출해 냄을 보여주었다. 또한 본 논문에서 제안한 알고리즘을 사용하여 배터리 내 열폭주 위험이 있는 셀과 노이즈가 심한 셀을 분류할 수 있었으며 그리드 서치를 통한 DBSCAN 파라미터 최적화를 통해 열폭주 위험 셀을 초기에 검출해 낼 수 있었다.

• 대한약침학회지
• /
• 제26권4호
• /
• pp.319-326
• /
• 2023

Objectives: The study's goal was to find out whether Chrysanthemum rubellum extract has anti-diabetic properties by concentrating on α-glucosidase and the PTP-1B signaling pathway. C. rubellum flowers were used for extraction using Methanol/water (80/20) as solvent. Methods: LC-MS techniques was used to check the presence of phytoconstituents present in C. rubellum extract. In vitro antidiabetic activity was evaluated using α-glucosidase inhibitory activity and PTP-1B signaling pathway. On Streptozotocin (STZ)-induced rats with diabetes, the in vivo antidiabetic efficacy was assessed using a test for oral glucose tolerance. Results: The phytoconstituents identified in the extract of C. rubellum were apigenin, diosmin, myricetin, luteolin, luteolin-7-glucoside, and Quercitrin as compound 1-6, respectively. Results showed that diosmin exhibited highest α-glucosidase inhibitory activity i.e. 90.39%. The protein level of PTP-1B was lowered and the insulin signalling activity was directly increased by compounds 1-6. The maximum blood glucose levels were seen in all groups' OGTT findings at 30 minutes following glucose delivery, followed by gradual drops. In comparison to the control group, the extract's glucose levels were 141 mg/dL at 30 minutes before falling to 104 mg/dL after 120 minutes. The current study has demonstrated, in summary, that extract with phytoconstituents reduce blood sugar levels in rats. Conclusion: This finding suggests that extract may reduce the chance of insulin resistance and shield against disorders like hyperglycemia.

• Asia pacific journal of information systems
• /
• 제17권3호
• /
• pp.105-130
• /
• 2007

Recently, there is a substantial interest in implementing Business Process Management System(BPMS) among enterprises with the purpose of business process innovation. BPMS redesigns and coordinates business processes in terms of both automated steps and human involvement in order to maximize the value of both involved people and systems. The reason why BPMS is getting attention from top managers is that it has the possibility to optimize the business processes by cycling the process of modeling, execution, monitoring, evaluation, and redesigning work processes. Thus, it has created high expectations about not only productivity improvement but also business process innovation. However. having an innovative nature, which is used for process innovation, BPMS implementation has great potential to stir up employee resistance. The analysis and the discussion about the prevention of the resistance against IS(Information Systems) is important because IS change the way people work and also alter the power structure within the organization, in general. The purpose of this study is to investigate factors that have an impact on the effective adoption of BPMS at the enterprise level. To find out these factors, this study considers two characteristics of BPMS: First. BPMS shares some characteristics with other enterprise-wide IS such as ERP. Second, it has special BPMS-specific characteristics. Due to the lack of previous research on BPMS adoption, interviews were carried out with IT-consultants and CIOs who conducted BPMS projects previously to find out BPMS-specific features that would make BPMS unique when compared to other enterprise-wide IS. As a result, the monitoring function was chosen as the main BPMS-specific factor. Thus, this paper reviewed studies both on enterprise-wide IS adoptions, which applied Technology Acceptance Model (TAM) and secondly on computer based monitoring to find out factors that would influence the employees' perception on the monitoring function of BPMS. Based on the literature review, the study suggested three factors that would have an impact on the employee's perception of the monitoring function: fairness of enterprise evaluation system, fairness of the boss, and self-efficacy of their work. Three factors that would impact the enterprise-wide IS adoption were also set: the shared belief in the benefit of BPMS, training, and communication. Then, these factors were integrated with TAM. Structural equation modeling was used to test hypotheses, out factors that would impact the employees' perception on the monitoring function of BPMS. Based on the literature review the study suggested three factors that would have an impact on the employee's perception of the monitoring function: fairness of enterprise evaluation system, fairness of the boss, and self-efficacy of their work. Three factors that would impact the enterprise-wide IS adoption were also set: the shared belief in the benefit of BPMS, training, and communication. Then, these factors were integrated with TAM. Structural equation modeling was used to test hypotheses. The data analysis results showed that two among three monitoring function related factors - enterprise evaluation system and fairness of the boss - were significant. This implies that employees would worry less about the BPMS implementation as long as they perceive the monitoring results will be used fairly for their performance evaluation. However, employees' high self-efficacy on their job was not a significant factor in their perception of the usefulness of BPMS. This is related to cases that showed employees resisted against the information systems because they automated their works (Markus, 1983). One specific case was an electronic company, where the accounting department workers were requested to redefine their job because their working processes were automated due to BPMS implementation.