• Annual Conference of KIPS
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• 2009.04a
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• pp.444-447
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• 2009

임베디드 시스템은 여러 유형의 엄격한 제약사항을 지키는 범위 안에서 개발되어야 하기 때문에 요구사항의 우선순위 결정은 매우 중요하다. 이는 결국 개발 초기단계에 요구사항 우선순위화를 통하여 주어진 제품 개발 목표 및 개발 조직의 다양한 상황에 적합한 관점을 고려한 최적의 요구사항을 선택하는 활동이 요구된다. 따라서 본 논문에서는 임베디드 시스템의 다양성과 특수성을 고려한 임베디드 시스템 요구사항 우선순위 기법을 제안한다. 이를 위해 요구사항 우선순위 관점에서 임베디드 시스템 개발에 적합한 관점, 의존 및 상충 관계를 고려하여 요구사항을 우선순위화하며, 제안된 방법을 핸드폰 개발 사례에 적용하여 유용성을 검증한다. 이러한 합리적인 우선순위 선정을 통해 주어진 비즈니스 목표에 부합되고 시장요구에 적극적으로 반응할 수 있는 제품을 만들 수 있다.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.151-153
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• 2020

PFC( Power Factor Corrector)회로의 목적은 입력전류의 역률 개선을 목적으로 널리 사용되고 있다. 그리고 입/출력 파워의 균형을 위해 대용량의 출력Cap이 사용되며 주로 전해액이 포함된 부품을 사용한다. 그러나 사용 되는 전해Cap은 AC-DC 변환회로의 수명시간을 결정지으며 이를 사용하는 전자제품의 전체 수명을 반영하게 된다. 본 연구는 출력Cap용량을 최소와시키며 이를 대체 할 수 있는 Film Cap을 사용하여 제품의 전체 수명시간을 개선시키는데 목적이 있으며 다이나믹 특성의 부하와 서지성 낙뢰 및 과전압 대책에 대한 해결방안을 실제 시스템에서 구현하고자 한다. 또한 입력 서지 및 다이나믹 부하에 대한 개선 회로를 확인하고 이론적 결과는 200W LED TV에서 검증한다.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.265-266
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• 2020

X-ray 발생장치는 주로 열전자생성을 위한 저압 발생장치과 열전자가속을 위한 고압전원 및 X-ray 튜브 등으로 이루어져 있다. 따라서 X-ray 발생장치에는 저압전원과 고압전원의 설계가 필수적이다. 저압전원의 경우 전압, 전류의 정격이 비교적 작기 때문에 구현이 상대적으로 용이하나 고압전원은 40~200kV까지의 고전압을 생성해야하기 때문에 일반적으로 인버터, 고압 변압기, 배압회로 등 단계를 거쳐서 생성되도록 설계된다. 이들의 설계 방식에 따라 고압전원의 특성이 결정되게 된다. 본 논문에서는 55kV 11mA급 X-ray 발생장치를 설계, 제작하고 성능에 대해 검증하였다.

• Annual Conference on Human and Language Technology
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• 2023.10a
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• pp.571-576
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• 2023

본 연구에서는 인권의 측면에서 AI 모델이 향상된 답변을 제시할 수 있는 방안을 모색하기 위해서 AI가 인권의 문제를 고민하는 전문가와 자신의 문제를 해결하고자 하는 사용자 사이에서 어느 정도로 도움을 줄 수 있는가를 정량적, 정성적으로 검증했다. 구체적으로는 국가인권위원회의 결정례와 상담사례를 분석한 후 이를 바탕으로 좀 더 나은 답변은 무엇인지에 대해 고찰하기 위해서 인권과 관련된 질의 응답 세트를 만든다. 질의 응답 세트는 인권 코퍼스를 학습한 모델과 그렇지 않은 모델의 생성 결과를 바탕으로 한다. 또한 생성된 질의 응답 세트를 바탕으로 설문을 실시하여 전문적인 내용을 담은 문장에 대한 선호도를 분석한다. 본 논문은 대화형 생성 모델이 인권과 관련된 주제에 대해서도 선호되는 답변을 제시할 수 있는가에 대한 하나의 대안이 될 수 있을 것이다.

• Annual Conference of KIPS
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• 2023.11a
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• pp.248-249
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• 2023

블록체인의 데이터 중복 저장 문제를 해결하기 위해 소거 코드 기반의 분산 저장 방법이 제안되었고, 이에 따라 청크 데이터의 효율적인 전파가 중요해졌다. 본 연구는 이를 위해 QUIC 프로토콜을 도입하여 청크 데이터의 신속한 전파 기능을 구현하였다. 더불어 Reed-Solomon 코드 기반 시스템에서 QUIC 프로토콜의 효용성을 검증한 결과, QUIC 프로토콜은 분산 저장 시스템에서 청크 데이터 전파와 재인코딩 성능에 결정적 역할을 수행함을 확인하였다. 이는 QUIC 프로토콜이 블록체인과 같은 네트워크 환경에서 효과적으로 사용될 수 있음을 나타낸다.

• Annual Conference of KIPS
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• 2023.11a
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• pp.358-360
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• 2023

뱀장어는 내수면 양식어종으로 뱀장어 양식에서 널리 쓰이는 지수식 양식에 있어서 가장 중요하고 가장 어려운 것은 수질관리다. 수질을 구성하는 요소와 공급된 사료량은 서로 상관관계를 가지며, 이 상관관계에 이상 현상이 발생하면 먹이 섭취 불량과 폐사로 이어질 수 있다. 그래서 본 연구에서는 센서로 측정한 양식장 데이터와 인공지능 모델을 이용하여 수조 속 DO 를 예측하는 모델을 새롭게 제안하여, 적절한 사료 공급 시점과 적절한 공급량을 결정하는 방안에 적절히 사용할 수 있다는 것을 검증하였다. 사료 공급과 공급량에 따른 변화를 가미한 3 시간 후의 DO 를 합당한 이벤트 처리를 통해 예측하였다. 이를 활용하면 사료로 인해 떨어지는 DO 수치를 예측하고, DO 수치가 낮아 회복이 필요한 시점에 투입하는 사료량을 조절하여 질식으로 인해 발생하는 폐사로부터 양식어를 지키며 보다 안정적으로 양식을 위해 활용할 수 있다는 점을 확인할 수 있었다.

• Journal of Venture Innovation
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• v.6 no.4
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• pp.133-151
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• 2023

The purpose of this study is to examine the correlation between medical service quality, customer trust, customer satisfaction and customer loyalty in domestic convalescent hospitals. Participants in this research were individualis who assumed responsibility for being the main caretaker of patients that were in hospitalization The following main results were derived. First, among the quality of medical services, tangibles, realiability, responsiveness, empathy were found to have a significant positive effect on customer trust. Second, among the quality of medical services, tangibles, realiability, responsiveness, assuracne, empathy were found to have a significant positive effect on customer satisfaction. Third, among the quality of medical services, only realiability variable were found to have a significant positive effect on customer loyalty. This result means that customer satisfaction and customer trust plays a mediating role between the medical service quality and loyalty. Fourth, customer trust was found to have a significant positive effect on customer loyalty. Fifth, customer satisfaction was found to have a significant positive effect on customer loyalty.

• Korean Security Journal
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• no.36
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• pp.177-200
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• 2013

As we enter a high industrial society that widens the gap between the rich and poor, demand for the security services has grown explosively. With the growth in quantitative expansion of security services, people have also placed increased requirements on more sophisticated and diversified security services. Consequently, market outlook for private security services industry is positive. However, Korea's private security services companies are experiencing difficulties in finding a direction to capture this new market opportunity due to their small sizes and lack of management-strategic thinking skills. Therefore, we intend to offer a direction of development for our private security services industry using a management-strategy theory and the Analytic Hierarchy Process(AHP), a structured decision-making method. A resource-based theory is one of the important management strategy theories. It explains that a company's overall performance is primarily determined by its competitive resources. Using this theory, we could analyze a company's unique resources and core competencies and set a strategic direction for the company accordingly. The usefulness and validity of this theory has been demonstrated as it has often been subject to empirical verification since 1990s. Based on this theory, we outlined a set of basic procedures to establish a management strategy for the private security services companies. We also used the AHP method to identify competitive resources, core competencies, and strategies from private security services companies in contrast with public companies. The AHP method is a technique that can be used in the decision making process by quantifying experts' knowledge and unstructured problems. This is a verified method that has been used in the management decision making in the corporate environment as well as for the various academic studies. In order to perform this method, we gathered data from 11 experts from academic, industrial, and research sectors and drew distinctive resources, competencies, and strategic direction for private security services companies vis-a-vis public organizations. Through this process, we came to the conclusion that private security services companies generally have intangible resources as their distinctive resources compared with public organization. Among those intangible resources, relational resources, customer information, and technologies were analyzed as important. In contrast, tangible resources such as equipment, funds, distribution channels are found to be relatively scarce. We also found the competencies in sales and marketing and new product development as core competencies. We chose a concentration strategy focusing on a particular market segment as a strategic direction considering these resources and competencies of private security services companies. A concentration strategy is the right fit for smaller companies as a strategy to allow them to focus all of their efforts on target customers in a single segment. Thus, private security services companies would face the important tasks such as developing a new market and appropriate products for such market segment and continuing marketing activities to manage their customers. Additionally, continuous recruitment is required to facilitate the effective use of human resources in order to strengthen their marketing competency in a long term.

• Radiation Oncology Journal
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• v.20 no.2
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• pp.165-171
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• 2002

Purpose : In order to perform craniospinal irradiation (CSI) in the supine position on patients who are unable to lie in the prone position, a new simulation technique using a CT simulator was developed and its availability was evaluated. Materials and Method : A CT simulator and a 3-D conformal treatment planning system were used to develop CSI in the supine position. The head and neck were immobilized with a thermoplastic mask in the supine position and the entire body was immobilized with a Vac-Loc. A volumetrie image was then obtained using the CT simulator. In order to improve the reproducibility of the patients' setup, datum lines and points were marked on the head and the body. Virtual fluoroscopy was peformed with the removal of visual obstacles such as the treatment table or the immobilization devices. After the virtual simulation, the treatment isocenters of each field were marked on the body and the immobilization devices at the conventional simulation room. Each treatment field was confirmed by comparing the fluoroscopy images with the digitally reconstructed radiography (DRR)/digitally composite radiography (DCR) images from the virtual simulation. The port verification films from the first treatment were also compared with the DRR/DCR images for a geometrical verification. Results : CSI in the supine position was successfully peformed in 9 patients. It required less than 20 minutes to construct the immobilization device and to obtain the whole body volumetric images. This made it possible to not only reduce the patients' inconvenience, but also to eliminate the position change variables during the long conventional simulation process. In addition, by obtaining the CT volumetric image, critical organs, such as the eyeballs and spinal cord, were better defined, and the accuracy of the port designs and shielding was improved. The differences between the DRRs and the portal films were less than 3 mm in the vertebral contour. Conclusion : CSI in the supine position is feasible in patients who cannot lie on prone position, such as pediatric patienta under the age of 4 years, patients with a poor general condition, or patients with a tracheostomy.

• Cartoon and Animation Studies
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• s.28
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• pp.125-153
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• 2012

This study is regarding what motion modality has influences on aspects of genre and media. Nowadays, motion modality becomes an element which is actively manipulated in live actions as well as animations. And, it has been generally accepted that a strategy on manipulation of motion depends on matters of genre or medium. As respected, can we say the premise is correct? if it is, can we refine the premise more theoretically, without using the words, 'genre' or 'media' which have not been are not been defined on an academic aspect. I intend to discuss on this issue. I will speculate the issue of manipulation of motion modality on theoretical bases. According to McLuhan's hot/cool media theory and Bolter's oscillation theory, the effect of it turns out to be same as manipulation of sentience ratio of media readers, and the ideal result will be examined by an example analysis. In the analysis, I will explore what effects manipulation of motion has on several examples. Then, by examining what kind of correlation these effects has with media/genre positioning, I ultimately will evaluate the genre/medium-based determinism of motion modality, which is represented by a typical premise like "Animation is most realistic when it has the most animation-like movement." Conclusively I suggest a refined premise like the following. Modality of motion is a strategy depending on issues of genre, with no regard to issues of medium, and the issue of genre is a category which is positioned considering mixture ratio of sentience. With this reason, A strategy of modality of motion depends to sentience a certain sequence needs. So, motion modality becomes a strategy which has to be approached in functionality of genre rather than economic values which spring from technical devices like a motion capture.