• 한국콘텐츠학회논문지
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• 제19권9호
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• pp.233-241
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• 2019

본 연구의 목적은 국내 자본시장에서 외국인투자자의 감시자 역할로부터 발생하는 영향력이 글로벌 금융위기에 따라 차별적으로 관찰되는지를 실증적으로 분석하는 것이다. 본 연구에서는 2003년부터 2015년까지 총 2,919개의 기업데이터를 수집하여 외국인투자자 지분율과 기업의 자기자본비용 사이의 상관관계분석을 글로벌 금융위기 상황여부에 따라 수행하였다. 실증분석 결과, 외국인투자자는 일반적으로 기업에 대한 감시자 역할(monitoring role)을 효과적으로 수행함으로서 국내 자본시장에서 순기능적인 역할을 하고 있었다. 그러나 글로벌 금융위기 시와 같이 자본시장의 위험 수준이 극대화될 경우에는 이들의 감시자 역할이 효과적으로 이뤄지지 못하는 것으로 관찰되었다. 본 연구는 외국인투자자의 영향력이 자본시장의 위험 수준에 따라 달라질 수 있음을 제시하였다는데 시장참여자들과 학계에 공헌 할 수 있을 것으로 기대된다.

• Tribology and Lubricants
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• 제36권6호
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• pp.307-314
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• 2020

In this paper, studies on application cases of machine condition monitoring using oil sensors are reviewed. Owing to rapid industrial advancements, maintenance strategies play a crucial role in reducing the cost of downtime and improving system reliability. Consequently, machine condition monitoring plays an important role in maintaining operation stability and extending the period of usage for various machines. Machine condition monitoring through oil analysis is an effective method for assessing a machine's condition and providing early warnings regarding a machine's breakdown or failure. Among the three prevalent methods, the online analysis method is predominantly employed because this method incorporates oil sensors in real-time and has several advantages (such as prevention of human errors). Wear debris sensors are widely employed for implementing machine condition monitoring through oil sensors. Furthermore, various types of oil sensors are used in different machines and systems. Integrated oil sensors that can measure various oil attributes by incorporating a single sensor are becoming popular. By monitoring wear debris, machine condition monitoring using oil sensors is implemented for engines, automotive transmission, tanks, armored vehicles, and construction equipment. Additionally, such monitoring systems are incorporated in aircrafts such as passenger airplanes, fighter airplanes, and helicopters. Such monitoring systems are also employed in chemical plants and power plants for managing overall safety. Furthermore, widespread application of oil condition diagnosis requires the development of diagnostic programs.

• 아동학회지
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• 제30권1호
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• pp.77-88
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• 2009

This study explored moderating effects of parental attachment andparental monitoring in the relationship between stress and problem behavior among Korean adolescents. The Korean Youth Panel Study (KYPS) was used as sample data with a total of 2,503 11th grade students involved in this study. Results of hierarchical regression analyses showed that parental attachment (for both male and female adolescents) and parental monitoring (for male adolescents) played the role of moderators in the relationship between stress and problem behavior. That is, good parental attachment and monitoring reduced stress inducing problem behavior for male adolescents but only parental attachment reduced stress inducing problem behavior for female adolescents. Conclusions highlighted the importance of parents' role in the prevention of adolescent problem behavior.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.46-46
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• 2000

A quadruped monitoring robot is introduced. The robot has several features that poses arbitrary position thanks to a 4-wheel hive mechanism, transmits an image and command data via RF wireless communication, and moreover, the imaged date are transferred through a network communication. The robot plays a role in monitoring what is happening around the robot and covers wide range due to a moving camera operated by the 4-wheel mechanism. The robot system can be applied k versatile models based the distinguished techniques introduced in this paper

• 대한예방의학회:학술대회논문집
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• 대한예방의학회 1994년도 교수 연수회(역학)
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• pp.270-284
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• 1994

Interim analyses of randomized trials enable investigators to make more efficient use of limited research resources and to satisfy ethical requirements that a regimen be discontinued as soon as it has been established to have an inferior efficacy/toxicity profile. Unfortunately. the integrity and credibility of these trials can be compromised if inappropriate procedures are used in monitoring interim data. 'In this paper we discuss how group sequential designs provide useful guidelines that enable one to satisfy the valid objectives of interim monitoring while avoiding undesirable consequences, and we consider how flexible one can be in the way such designs are implemented. We also provide motivation for the role of data-monitoring committees in preserving study integrity and credibility in either government- or industry-sponsored trials. In our view. these committees should have multidisciplinary representation and membership limited to individuals free of apparent significant conflict of interest, and ideally should be the only individuals to whom the data analysis center provides interim results on relative efficacy of treatment regimens. Finally. we discuss some important practical issues such as estimation following group sequential testing, anal ysis of secondary outcomes after using a group sequential design applied to a primary outcome, early stopping of negative trials. and the role of administrative analyses.

• 융합보안논문지
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• 제17권2호
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• pp.69-80
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• 2017

IT시대의 고도화로 인한 사이버 범죄는 지능화, 다양화, 고도화 되고 있는 가운데 보안 관제의 역할은 더욱 중요해졌다. 과거 방화벽이나 IDS 등 보안 장비에만 의존하던 방식과는 달리 실시간 감시를 통해 사이버 공격에 대한 대응을 하는 보안 관제 업무가 광범위해지고 그 역할 또한 중요하게 되었다. 현재의 사이버 위협에 대해 보안 장비만으로는 안정적인 방어를 할 수 없기 때문에 보안 장비를 운영 및 감시하고 실시간적인 대응을 할 수 있는 보안 관제의 업무가 필수 요소가 된 것이다. 본 연구에서는 네트워크 보안시스템을 효율적으로 구성하는 방법과 보안시스템을 실시간 운영하는 보안관제의 현황과 개선방안에 대해 다루고자 한다.

• 농업과학연구
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• 제51권1호
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• pp.63-77
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• 2024

Yield monitoring systems have become integral to precision agriculture, providing insights into the spatial variability of crop yield and playing an important role in modern harvesting technology. This paper aims to review current research trends in yield monitoring systems, specifically designed for non-grain crops, including cabbages, radishes, potatoes, and tomatoes. A systematic literature survey was conducted to evaluate the performance of various monitoring methods for non-grain crop yields. This study also assesses both mass- and volume-based yield monitoring systems to provide precise evaluations of agricultural productivity. Integrating load cell technology enables precise mass flow rate measurements and cumulative weighing, offering an accurate representation of crop yields, and the incorporation of image-based analysis enhances the overall system accuracy by facilitating volumetric flow rate calculations and refined volume estimations. Mass flow methods, including weighing, force impact, and radiometric approaches, have demonstrated impressive results, with some measurement error levels below 5%. Volume flow methods, including paddle wheel and optical methodologies, yielded error levels below 3%. Signal processing and correction measures also play a crucial role in achieving accurate yield estimations. Moreover, the selection of sensing approach, sensor layout, and mounting significantly influence the performance of monitoring systems for specific crops.

• International Journal of Safety
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• 제8권1호
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• pp.18-23
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• 2009

Due to dermal exposure to hazardous chemicals causing potential adverse health symptoms through skin absorption, dermal monitoring has had an important role in assessing such exposure. This paper overviews comparatively a number of studies of dermal monitoring with different methodologies such as surface monitoring, skin wiping, skin washing, adhesive methods and tape stripping, fluorescence and infrared spectroscopy, skin patches, pads and clothing, video exposure monitoring and dermal exposure assessment toolkits and models. However, there is a lack of information on the relationship between exposure levels and adverse health symptoms. Therefore, more specific strategies for dermal exposure monitoring should be developed and standardized with further development of biological and ocular monitoring.

• 가정과삶의질연구
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• 제22권5호
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• pp.237-251
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• 2004

The main purpose of this study was to examine the relations between maternal parenting, mother-adolescent conflict, and middle adolescents' self-esteem with a sample of 271 high school students enrolled in 2nd year at high school in Seoul, and their mothers. Data was analysed using correlations and regression analyses. Maternal affection, monitoring and reasoning were positively related with and maternal physical abuse and neglect were negatively related with adolescent self-esteem. Maternal over-expectation and intrusiveness were not related with adolescent self-esteem in boys, but were negatively related with adolescent self-esteem in girls. In both adolescents' and mothers' report, mother-adolescent conflict was related negatively with adolescent self-esteem. In mothers' report, mother-adolescent conflict was not related with adolescent self-esteem in boys, but was negatively related with adolescent self-esteem in girls. In adolescents' report, maternal affection, monitoring and reasoning were negatively related with mother-adolescent conflict, which maternal over-expectation, intrusiveness, neglect, and physical abuse were positively related with mother-adolescent conflict. In mothers' report, maternal affection, monitoring and reasoning were negatively related with mother-adolescent conflict. Mediating roles of mother-adolescent conflict in relation of maternal parenting and adolescent self-esteem were examined. In adolescents' report, mother-adolescent conflict perceived by male adolescents played a mediating role between maternal monitoring, reasoning and physical abuse, representatively, and adolescent self-esteem. And mother-adolescent conflict perceived by female adolescents played a mediating role between maternal parenting with the expectation of maternal affection and adolescent self-esteem. In mothers' report, mother-adolescent conflict perceived by mothers only played mediating role between maternal monitoring and adolescent self-esteem. So, mediating roles of mother-adolescent conflict were more emphasized in the adolescents' report than in the mothers' report. Therefore, the fact that maternal parenting except affection affects the adolescent self-esteem indirectly through mother-adolescent conflict can be found. Implying that maternal affection is crucial in implying positive self-esteem of adolescents.

• 대한가정학회지
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• 제39권12호
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• pp.129-140
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• 2001

The effects of material monitoring and information sources of maternal knowledge on externalizing and internalizing behaviors of adolescents were examined with a sample of 323 ninth-grade middle school students(163 boys and 160 girls) and their mothers. Data were collected using questionnaires regarding maternal monitoring, information sources of maternal knowledge, and externalizing and internalizing behaviors of adolescents. The major findings were that 1) unemployed mothers showed more monitoring than employed mothers; 2) mothers perceived that girls showed more self-disclosure and were more controlled by them than boys; 3) girls showed more internalizing behavior than boys; 4) the more adolescents were monitored by their mothers, the less internalizing behavior they showed; 5) the more maternal solicitation was used, the more externalizing behavior girls showed; 6) adolescents showed the least externalizing behavior when maternal monitoring was highly perceived by both mothers and adolescents. And perception of maternal monitoring by adolescents themselves plays an important role in showing less externalizing behavior.