• International Journal of Aeronautical and Space Sciences
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• 제18권4호
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• pp.719-728
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• 2017

This paper proposes a synthesis of new guidance law to generate an evasive maneuver against enemy's missile interception while considering its impact angle, acceleration, and field-of-view constraints. The first component of the synthesis is a new function of repulsive Artificial Potential Field to generate the evasive maneuver as a real-time dynamic obstacle avoidance. The terminal impact angle and terminal acceleration constraints compliance are based on Time-to-Go Polynomial Guidance as the second component. The last component is the Logarithmic Barrier Function to satisfy the field-of-view limitation constraint by compensating the excessive total acceleration command. These three components are synthesized into a new guidance law, which involves three design parameter gains. Parameter study and numerical simulations are delivered to demonstrate the performance of the proposed repulsive function and guidance law. Finally, the guidance law simulations effectively achieve the zero terminal miss distance, while satisfying an evasive maneuver against intercept missile, considering impact angle, acceleration, and field-of-view limitation constraints simultaneously.

• 한국빅데이터학회지
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• 제4권2호
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• pp.47-59
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• 2019

최근 국내외에서 확산되고 있는 RPA(Robotic Process Automation) 솔루션은 사용자가 응용프로그램의 GUI(Graphic User Interface)에서 대상 업무를 간편하게 자동화 할 수 있어 국내 다수 금융회사에서도 동 솔루션을 적용하는 사례가 지속적으로 증가하고 있다. 하지만 금융기관이 반드시 준수해야 하는 주요 감독규제들은 기존 전통적인 SDLC(Software Development Life Cycle)를 기반으로 하고 있어 일반 사용자의 시스템 Interface 환경 단에서 자동화하는 RPA에 그대로 적용되기에는 어려움이 있었다. 이에 본 논문에서는 금융회사가 RPA를 도입함에 있어 고려되어야 하는 주요 감독규정들과 통제항목들을 정리하고 RPA를 도입한 24개 금융회사의 통제 적용현황을 조사하여 향후 관련 컴플라이언스의 개정 필요성을 제시해보고자 한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1294-1297
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• 2003

With the development of medical field, many kinds of operations have been performed on human articulation. Arthroscopic surgery, which has Irrigation Pumping System for security of operator vision and washing spaces of operation, has been used for more merits than others. In this paper, it is presented that the research on a reliable control algorithm of the pumping system instrument for arthroscopic surgery. Before clinical operation, the flexible artificial articulation model is used for realizing the model the most same as human's and the algorithm has been exploited for it. This system is considered of the following; limited sensing point, dynamic effect by compliance, time delay by fluid flow and so on. The system is composed with a pressure controller, a regulator for keeping air pressure, an airtight tank that can have distilled water packs, artificial articulation and a measuring system, and has controlled by the feedback of pressure sensor on the artificial articulation. Also the system has applied to Smith Predictor for time delay and the parameter estimation method for the most suitable system with both the experiment data and modeling. In this paper, the pressure error that is between an air pressure tank and an artificial articulation was measured so that the system could be presumed and then the controller had developed for performing State-Feedback. Finally, the controller with a real microprocessor has realized. The confidence of system can be proved by applying this control algorithm to an artificial articulation experiment material.

• Safety and Health at Work
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• 제10권4호
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• pp.476-481
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• 2019

Background: Mystery shopping is a method in which a company monitors quality of service and employee conduct and compliance with regulations using an evaluator posing as a customer. It is a typical tool of customer-centered bureaucratic control insofar as it provides overall and standardized evaluation of intangible elements of customer service as well as physical elements of service environments. The purpose of this study is to examine how mystery shopping is related to the health status of service workers in South Korea. Methods: Data from semistructured interviews with 15 workers were collected from January to April 2019 to obtain information on service worker experiences with mystery shopping. Data were analyzed using the constant comparison method. Results: Mystery shopping limits worker autonomy and stiffens the workplace environment by standardizing and monitoring labor processes for service workers. In addition, mystery shopping heightens work stress through increased labor intensity. Five mechanisms by which mystery shopping affects service worker health are identified and comprise (1) multifaceted and multilayered surveillance, (2) evaluator subjectivity and irrational requirements, (3) standardized rules combined with high pressure to achieve sales, (4) self-esteem degradation because of evaluator results, and (5) musculoskeletal disorders because of strict adherence to labor processes based on evaluator results. Conclusion: Mystery shopping as an evaluation method should be reconsidered not only in terms of health problems but also in terms of organizational efficiency and issues of human rights.

• 가정과삶의질연구
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• 제24권3호
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• pp.83-94
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• 2006

In order to understand how consumers' buying motivation is formed, that is the starting point of consumer behavior or consumers' decision-making processes, we examined how the interpersonal orientation for consumers is organized to control buying motivation and create a stepping-stone for subjects' behavior in fast varied consumer environments. In addition, we examined what influence this interpersonal orientation has on consumers' buying motivations. The results are shown as follows: First, interpersonal orientation is classified into six categories, according to Cohen's three types, i.e., compliance, detachment I: emotion independence, detachment II: performance independence, detachment III: perception independence, aggressiveness I: competitiveness, aggressiveness II: aggressiveness. Second, based on our inspection of the relation between interpersonal orientation and consumers' buying motivations, for external motivation and internal motivation, the value of R2 in regression seems too low to act as an influencing power on interpersonal orientation, while in case of introjected motivation, identified motivation I: self respect, and identified II: pursuit of harmony, I there seems to be some relationship.

• 한국통신학회논문지
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• 제40권5호
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• pp.841-850
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• 2015

XaaS(Everything as a Service)는 사용자가 필요한 소프트웨어 컴포넌트를 네트워크를 통하여 제공하고, 사용자는 자신이 이용한 컴포넌트에 따라 과금을 지불하는 서비스이다. 일반적으로 XaaS는 클라우드 컴퓨팅의 일종으로 간주된다. 그러나 XaaS는 일반적으로 중앙의 서비스 사업자에 의하여 제공되기 때문에 다양한 해킹 공격의 목표가 되기 쉽다. 특히, XaaS가 APT (Advanced Persistent Threat) 공격의 목표가 된다면, XaaS 서비스 사업자뿐만 아니라 사용자들까지 심각한 위험에 노출될 수 있다. 현재 다양한 APT 공격 대응 방안이 제안되고 있으나, 보안 통제 측면에서 모든 요소를 고려하고 있지 못하다. 본 논문에서는 안전한 XaaS 운영을 위한 기술적, 정책적 요소를 고려한 보안 감사 방안을 제안한다.

• 항공우주기술
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• 제1권1호
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• pp.84-96
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• 2002

본 연구는 차세대 국내 통신위성 전력계 서브시스템 비행모델 설계의 기본 지침서로 사용하기 위한 것이다. 이러한 목적을 위해 전력계 시스템은 모든 기대되는 위성 임무기간동안 서브시스템 규격서에 제시된 성능요구사항을 만족시키기 위해 설계되어졌다. 조절된 전력 버스는 전력제어 및 분배장치로부터 다양한 위성부하까지 42.5V로 분배되어지고 태양전지 어레이들은 6개의 패널로 구성하였다. 한 패널은 3개의 회로로 구성되며 각 회로는 7개의 스트링으로 설계되어졌다. 배터리 시스템은 2개의 배터리로 구성되어졌으며 각 배터리는 26개(IPV) NiH2셀로 구성되어졌다. 배터리는 80% DOD(Depth of Discharge)에서 에너지의 2878Watt-hours를 공급할 수 있는 용량으로 설계되어졌다.

• 수산해양교육연구
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• 제5권2호
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• pp.138-146
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• 1993

In accordance with the establishment of 200 nautical miles EEZ regime as a customary international law since the mid - 1980s, the area of global high seas became reduced relatively. On the other hand, the importance of high seas fishing ground became serious for the distant-water fishing states like Korea. But it can be expected that international dispute on the jurisdictional problem of the fishing vessels engaging high sea fishery will occur frequently owing to institutional inertia of the UNLOS Convention on this matter. "The Draft Agreement to Promote Compliance with International Conservation and Management Measures by Fishing Vessels on the High Seas" as an international code of conduct for responsible fishing which was adopted by FAO in 1993 is providing the more consolidating and definiting rules for jurisdictional responsibility of flag states to make completion the loophole of the UNLOS Convention. As a precondition for the effective control and enforcement of activities of the fishing vessels engaging high sea fishery, the Draft Agreement is providing some articles allowing the flag states to hold the rights of granting nationality, fishery permission, fishery supervision and control with punishment for the fishing vessels entitled to fly their own flag. Accordingly it can be evaluated that this Draft Agreement does not deviate on the whole from the traditional practice and the basic legal principle of the UNLOS Convention.

• 한국안전학회지
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• 제34권5호
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• pp.119-131
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• 2019

Among the themes for CSR(Corporate Social Responsibility), consumer issues include protecting the health and safety of consumers who purchase and use the products. In particular, ensuring product safety is a major theme of consumer issues for corporate social responsibility. Currently, the government implements the Electrical Appliances and Consumer Products Safety Control Act for product safety management and selects products that may harmful to consumers as safety control items, and manages the products by designating them as 4 types of safety certification, safety confirmation, supplier conformity verification, and safety standard compliance. In this paper, we propose management plans for the establishment of a more reasonable classification type of safety management target for 48 items of consumer products to be controlled by the act, and confirm the validity of the plan. First, we perform cluster analysis using data for CISS (Consumer Injury Surveillance System) to derive a new classification type of the safety management target. Next, we compare the results of the cluster analysis with the classification type of the act and the existing scenario classification method RAS (Risk Assessment by Scenario) and the causal network method RAMP (Risk Assessment Method based on Probability). Based on these results, we propose two new plans of safety management target classification and verify its validity.

• 로봇학회논문지
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• 제14권2호
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• pp.131-138
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• 2019

In this study, we developed an FSEA(Force-sensing Series Elastic Actuator) composed of a spring and an actuator has been developed to compensate for external disturbance forced. The FSEA has a simple structure in which the spring and the actuator are connected in series, and the external force can be easily measured through the displacement of the spring. And the characteristic of the spring absorbs the shock to the small disturbance and increases the sense of stability. It is designed and constructed to control the stiffness of such springs more flexibly according to the situation. The conventional FSEA uses a fixed stiffness spring and the actuator is not compensated properly when it receives large or small external force. Through this experiment, it is confirmed that FSEA compensates the external force through the proposed algorithm that the variable stiffness compensates well for large and small external forces.