• Strategy21
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• 통권39호
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• pp.163-197
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• 2016

The completion of Jeju Naval Base on February 2016 made the Republic of Korea Navy(ROKN) review the size and role of the Maritime Task Flotilla(MTF). The new strategic environment for the 12st century and the new challenges require the Navy to counter North Korea's provocations and prevent potential enemy's threat. The Navy is also required to take part in the variety of international roles and missions commensurated with Korea's global status to maximize the national interest. Despite these changes, Korea's military construction concept is still unable to break away from the old paradigm of the North Korean threat largely centered. In order to develop the current MTF into the Task Group with the construction of Jeju Naval Base, the Navy must newly not only establish new force development plan and fleet management concepts but also go to persuade and convince policy decision makers. To this end, the following efforts should be promoted. First, the ROK Navy steps up efforts in order to share with the Task Group's vision and strategy. The Navy should also provide the size and structure as well as the missions and roles of the Task Group to react to new maritime security environment. Second, the Navy analyse the MTF's ability and what is required and necessary to perform its duty. After that, it must set out the direction of the Task Group's force development. Third, the current missions and roles of the MTF should be re-established to respond various threats. Finally, accommodating of new technology to the MTF should intensify its strengths. The ROK Navy has a mixed force structure consisting of three fixed- base fleets and a MTF. The fixed base fleet has a passive force to defend and protect its own sea areas, but the MTF should actively not only counter North Korea's threats, including ballistic missiles, but also fight potential threats and takes international missions as a primary task force. However, the MTF has a limited capability to accomplish given missions and long-range operations, and thus, the ROK Navy is strongly required to construct the Task Group.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2001년도 추계학술대회 논문집
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• pp.187-192
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• 2001

In this paper, a practical method to generate task strategies applicable to charmfulness and high-precision assembly, is proposed. The difficulties in devising reliable assembly strategies result form various forms of uncertainty such as imperfect knowledge on the parts being assembled and functional limitations of the assembly devices. In approach to cope with these problems, the robot is provided with the capability of learning the corrective motion in response to the force signal through iterative task execution. The strategy is realized by adopting a learning algorithm and represented in a binary tree type database. To verify the effectiveness of the proposed algorithm, a series of simulations and experiments are carried out under assimilated real production environments. The results show that the sensory signal-to-robot action mapping can be acquired effectively and, consequently, the assembly task can be performed successfully.

• 전기학회논문지
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• 제61권1호
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• pp.148-154
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• 2012

For a successful checkpointing strategy, we should place checkpoints so as to optimize fault-tolerance capability of real-time systems. This paper presents a novel scheme of checkpoint placement for real-time systems with periodic multi-tasks. Under the influence of transient faults, multi-tasks are scheduled by the Rate Monotonic (RM) algorithm. The optimal checkpoint intervals are derived to maximize the probability of task completion. In particular, this paper is concerned about the general case that the deadline of a task is longer than the period. Compared with the special condition that the deadline is equal to or less than the period, this general case causes a more complicate test procedure for schedulability of the RM algorithm with respect to a given set of checkpoint re-execution vectors. The probability of task completion is also derived in a more complex form. A case study is given to show the applicability of the proposed scheme.

• 한국의류학회지
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• 제42권5호
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• pp.884-896
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• 2018

This study investigates coping strategies of overweight or underweight males in Korea. For this purpose, the authors identify types of stress related to weight management. A qualitative method was utilized to collect the data related to successful weight management experiences of males aged 20-37 years. Data were analyzed based on a motivation theory of coping, which suggests coping strategy elements. The results of this study identified the stress related to weight: dissatisfaction with appearance, others' disapproval of appearance, health problems, weaker athletic ability, negative self-perception, passiveness about appearance, lower romantic attractiveness, others' disapproval of lower romantic attractiveness, weakened task execution capability, and negative stereo-types about task execution capability. In addition, six coping strategies were suggested: improved appearance, improved physical function, improved positive self-perception, more choices to improve appearance, enhanced romantic relationship, and enhanced job performance. This study shows that weight problems in modern society are diverse and complex. Therefore a man who has abnormal weight needs to clarify his stress first and then proposes strategies that are appropriate for each type of stress.

• 제어로봇시스템학회논문지
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• 제14권2호
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• pp.197-204
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• 2008

The purpose of this paper was to develop a rehabilitation training system which is controlled by electric currents to the Magneto-Rheological dampers system. This system provided the function for the training of the unbalance of the lower extremities. 10 subjects executed the tracing and moving exercises which are presented through the display monitor and confirmed own the capability of performance on the task. The electromyographies of the four muscles in lower extremities were recorded and analyzed in the time and frequency domain the muscles of interest were rectus femoris, biceps femoris, gastrocnemius, tibialis anterior. The experimental results showed that subjects had a task under feedback mode then subjects improve the capability of performance, increasing the in time, decreasing the out time and the distance of body shift. The moving average EMG, spectral energy of four muscle is lower the feedback mode than the constant mode. This could aid the hemiplegic patients to train more easily.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2004년도 학술대회지
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• pp.48-53
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• 2004

In this paper, the task-oriented optimal configuration in the sense of Velocity and Force manipulability measure of manipulator mounted on ROV is considered. Manipulability is a quantitative measure of manipulator's capability obtained under the limits of joint velocities or torques. The base arrangements and optimal joint configuration of manipulator, that maximize the manipulability measure under the constraints of given task, are investigated. With the two types of base arrangements of manipulator, workspace analysis is carried out to investigate merits and demerits of each arrangement on the view of manipulability measure. To find optimal joint configuration for a given task with each arrangement, the SQP(Sequential Quadratic Programming) optimization are performed. Weighted linear combination of velocity and force manipulability measure is object function for SQP optimization. The kinematic parameters of Dual Orion manipulator which will be mounted on KORDI ROV are used for simulation.

• 임상간호연구
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• 제20권2호
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• pp.246-255
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• 2014

Purpose: Along the process of organ transplantation, coordinators perform complex professional roles, playing as a key person among recipients, donors, family members and medical staffs. The purpose was to analyze the tasks of organ transplantation coordinators using DACUM method and to establish the basis for standardizing them in accordance with relevant laws and systems. Methods: Participants were consisted of 78 transplantation coordinators working at the medical centers in Korea. The questionnaire was administered to analyze the criticality, difficulty and frequency of task elements. Results: The job of organ transplantation was classified into five duties, 13 tasks, and 84 task elements. The five duties were recipient management, donor management, organ donation activation management, organ transplantation administration, and professional capability development. On the four-point scale: donor management was the duty with the highest criticality (3.68), organ donation activation management was the duty of highest difficulty (2.96), and recipient management was the duty of the highest frequency (3.32). Conclusion: This study will be useful for developing an educational program and as a reference of nurse practitioner qualifying examination. It is necessary to develop a comprehensive educational program for transplantation coordinators in order to support them to take their complex roles successfully.

• Strategy21
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• 통권31호
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• pp.85-119
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• 2013

This paper asks whether the Republic of Korea (ROK) Navy should continue to focus on building ocean-going naval ships when it faces the threats of North Korean provocations in littoral areas. My position is that the ROK Navy should keep pursuing ocean-going capabilities. I provide explanations why it should do so from the perspectives of three important dimensions: capability, doctrine, and organizational identity. First, I argue that the distinction between a littoral navy and an ocean-going navy is an unnecessary dichotomy. It may lead to inefficiency in national security. The military posture should be designed in a way that it can address all external threats to national security regardless of whether they are from North Korea or not. Such capability is the one that the ROK Navy has tried to acquire with the 'Blue Water Navy' initiative since the 1990s. Second, also from the perspective of lately developed military doctrines that emphasize jointness and precision strike capability, ocean-going capabilities such as the mobile task fleet program have become a must, not an option, given today's security situations on and around the Korean peninsula. Lastly, I draw attention to the fact that the 'Blue Water Navy (BWN)' initiative meant more than just capability to the ROK navy. The BWN represents the ROK navy's organizational identity that the navy has defined since the 1980s as it emphasized promoting national interest and international standing as part of its organizational essence. Furthermore, the phrase 'blue water navy' took on symbolic meanings to the people that are associated with South Korean-ness including sovereignty, national pride, standing in the world and hopes for the future. Since 1990s, many scholars and experts have made the case for the necessity of improving South Korea's naval capability based on different rationales. They emphasized the protection of Sea Lines of Communication (SLOCs), the economic value of the sea, the potential danger associated with territorial disputes over islands, and increasing naval power of neighboring countries since the end of the Cold War. This paper adds to this debate by trying to explain the matter with different factors including naval doctrines and organizational identity. Particularly, this paper constitutes a unique endeavor in that it incorporating constructivist elements (that is, identity politics) in explaining a national security matter.

• 한국멀티미디어학회논문지
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• 제13권10호
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• pp.1423-1435
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• 2010

무선 센서 네트워크를 구성하는 센서 노드는 배터리 기반의 제한된 전원과 낮은 연산 능력의 초경량 마이크로프로세서, 그리고 제한된 크기의 메모리 자원 등과 같은 하드웨어 사양을 가지고 있다. 이와 같은 제약 사항에도 불구하고 무선 센서 노드는 센싱 데이터의 실시간 처리 및 데이터 송수신 작업을 동시에 병행할 수 있어야 한다. 이에 본 논문에서는 배터리 작동식의 무선 센서 노드를 위한 에너지 효율적인 실시간 태스크 스케줄링 기법을 제안하였다. 제안한 에너지 효율적인 실시간 스케줄링 가법은 태스크의 실제 실행시간이 최악 실행시간보다 작을 경우에 발생되는 태스크의 실행 여유시간을 이용하여, 마이크로프로세서의 동작 주파수를 조절하고 무선 센서 노드의 전력 소비를 줄인다. 제안한 기법의 동작을 시험한 결과, 효율적인 전력 소비를 제공함과 동시에 실시간 태스크의 마감시한이 보장됨을 확인하였다.

• 항공우주시스템공학회지
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• 제17권2호
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• pp.78-85
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• 2023

다수 무인기 체계에서 임무할당은 임무 수행 능력을 결정하는 중요한 요인이다. 본 논문은 유전 알고리즘에 기반한 임무계획기법을 제안한다. 본 기법을 통해 제한 조건을 만족하면서, 임무 완료 시간을 최소화하는 해를 구할 수 있다. 임무 할당 문제의 최적해를 구하기 위해서는 계산량이 많이 필요하므로 본 기법이 해를 구하는 대안이 될 수 있다. 본 기법은 현실 세계의 다양한 종류의 무인기, 임무, 제한 조건을 고려하였다. 제안된 기법은 각 무인기의 임무 시퀀스와 제한 조건 만족을 위한 임무 별 대기 시간을 도출한다. 다양한 수치적 시뮬레이션 결과를 통해 임무 종료 시간을 최소화하는 임무계획 기법의 성능을 확인하였다.