• Title/Summary/Keyword: resistance management

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Optimisation of Rolling Stock Wheelset Life through Better Understanding of Wheel Tyre Degradation

  • Vermeij, I.;Bontekoe, T.;Liefting, G.;Peen, J.
    • International Journal of Railway
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    • v.1 no.3
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    • pp.83-88
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    • 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.

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An Efficient Buffer Cache Management Scheme for Heterogeneous Storage Environments (이기종 저장 장치 환경을 위한 버퍼 캐시 관리 기법)

  • Lee, Se-Hwan;Koh, Kern;Bahn, Hyo-Kyung
    • Journal of KIISE:Computer Systems and Theory
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    • v.37 no.5
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    • pp.285-291
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    • 2010
  • Flash memory has many good features such as small size, shock-resistance, and low power consumption, but the cost of flash memory is still high to substitute for hard disk entirely. Recently, some mobile devices, such as laptops, attempt to use both flash memory and hard disk together for taking advantages of merits of them. However, existing OSs (Operating Systems) are not optimized to use the heterogeneous storage media. This paper presents a new buffer cache management scheme. First, we allocate buffer cache space according to access patterns of block references and the characteristics of storage media. Second, we prefetch data blocks selectively according to the location of them and access patterns of them. Third, we moves destaged data from buffer cache to hard disk or flash memory considering the access patterns of block references. Trace-driven simulation shows that the proposed schemes enhance the buffer cache hit ratio by up to 29.9% and reduce the total I/O elapsed time by up to 49.5%.

Development of Naturally Degradable "Rice Polymer" For Organic Weed Management of Red Pepper and Rice

  • Kang, C.K.;Nam, H.S.;Lee, Y.K.;Lee, S.B.;Lee, B.M.;Oh, Y.J.;Jee, H.J.;Hong, M.K.;Jung, K.W.;Lee, Y.J.;Choi, Y.H.
    • Korean Journal of Organic Agriculture
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    • v.19 no.spc
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    • pp.119-122
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    • 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.

Moon Jae-in Government Health Policy Evaluation and Next Government Tasks (문재인정부의 보건의료정책 평가와 차기 정부의 과제)

  • Tchoe, Byongho
    • Health Policy and Management
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    • v.31 no.4
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    • pp.387-398
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    • 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.

An Exploratory Study on Group Bullying of Labor Union Members in Labor-Management Disputes (노사분규 사업장 내 노동조합 조합원의 집단따돌림에 관한 탐색적 연구)

  • An, Sung-Eun;Lee, Dong-Yeon;Chae, Jun-Ho
    • Journal of Digital Convergence
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    • v.17 no.9
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    • pp.31-37
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    • 2019
  • The results of this study showed that victim's job motivation, organizational distrust, nervousness, turnover intention, frustration, stress and resistance, powerlessness and alienation were similar to previous studies. I was overwhelmed by the negative force of the collective union and experienced anger in the reality that one individual could not resist or find a solution. In addition, psychological factors such as union members' fear of union bullying were found to have a positive effect on the union members who did not join the strike and those who did not join the strike. It is necessary to consider the question of whether the group bullying behavior is valid in that the union bullying behavior of the union is effective in achieving the purpose of the group.

Analysis of YouTube Content on Oral Disease Information about the Elderly

  • Kim, Ji-Won;Gu, Hanna;Kwon, Hye-Jin;Lim, Jeong-Hyun;Lim, Hee-Jung
    • Journal of dental hygiene science
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    • v.22 no.1
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    • pp.1-8
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    • 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.

Win-Win Model Strategy According to Regulation on Large-Scale Stores (대형마트/SSM 출점 및 영업규제 대응에 따른 상생모델방안)

  • Park, Han-Hyuk
    • The Korean Journal of Franchise Management
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    • v.3 no.2
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    • pp.79-102
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    • 2012
  • The last year, the government restricted a new store open and businness hours of a large-scale stores, discount store and super super market(ssm). So, this research was examined the effect that the retailer was affected and its correspondence strategy First this research examined how the government restricted a large-scale stores in 2009 earlier and then this research analyzed how the Japan and France restricted it. Second this research examined that a new establishment and business hours change of a large-scale stores. Bacause of a small trader resistance in 2009 latter. Finally it analyzed the effect that a retail industry was affected in the future. bacause law was enforced. On the basis these things, a victim remedy was presented by retailers view. Bacause of international law and an excess regulation. Also, this research suggest that large retailer should expand a overse market and increase retailers private brand component ratio and develop overse brand. Finally this research also suggest that trader and retailer should continue to coperate and turn business direction into franchise system.

Battery thermal runaway cell detection using DBSCAN and statistical validation algorithms (DBSCAN과 통계적 검증 알고리즘을 사용한 배터리 열폭주 셀 탐지)

  • Jingeun Kim;Yourim Yoon
    • The Journal of the Convergence on Culture Technology
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    • v.9 no.5
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    • pp.569-582
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    • 2023
  • Lead-acid Battery is the oldest rechargeable battery system and has maintained its position in the rechargeable battery field. The battery causes thermal runaway for various reasons, which can lead to major accidents. Therefore, preventing thermal runaway is a key part of the battery management system. Recently, research is underway to categorize thermal runaway battery cells into machine learning. In this paper, we present a thermal runaway hazard cell detection and verification algorithm using DBSCAN and statistical method. An experiment was conducted to classify thermal runaway hazard cells using only the resistance values as measured by the Battery Management System (BMS). The results demonstrated the efficacy of the proposed algorithms in accurately classifying thermal runaway cells. Furthermore, the proposed algorithm was able to classify thermal runaway cells between thermal runaway hazard cells and cells containing noise. Additionally, the thermal runaway hazard cells were early detected through the optimization of DBSCAN parameters using a grid search approach.

Antidiabetic Effect of Standardized Chrysanthemum rubellum Hydroethanolic Extract by Targeting α-Glucosidase and the PTP-1B Signaling Pathway for Alleviating Diabetes in Experimental Model

  • Bichitrananda Tripathy;Nityananda Sahoo;Sudhir Kumar Sahoo
    • Journal of Pharmacopuncture
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    • v.26 no.4
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    • pp.319-326
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    • 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.

An Empirical Study on the Impact of the Perception of the Monitoring Function on Effective BPMS Adoption (모니터링 기능에 대한 인식이 효과적인 BPMS 도입에 미치는 영향)

  • Chae, Myung-Sin;Park, Jin-Suk;Lee, Byung-Tae
    • Asia pacific journal of information systems
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    • v.17 no.3
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    • pp.105-130
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    • 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.