• 정보관리연구
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• 제38권2호
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• pp.25-57
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• 2007

회색문헌은 연구개발 활동에서 핵심적인 자료로 이용될 수 있는 가능성이 크지만 관리가 어려운 자료로 알려져 있다. 본 연구는 현재 회색문헌의 수집, 조직, 이용상의 문제점과 개선점을 파악함으로써 더 나은 회색문헌 관리방안을 모색하기 위한 근거자료를 마련하는 것을 목적으로 한다. 문헌 연구를 통해 회색문헌의 정의, 종류와 특징, 유용성에 대해 정리하고 해외의 주요 기관들에서 회색문헌을 관리하는 사례에 대해 분석하였으며 국내 과학기술분야의 정부산하연구소에서 회색문헌 관련 업무를 담당하고 있는 실무자와의 심층 면담을 통해 자료 유형별 관리방안을 제시하였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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• pp.421-426
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• 2004

Analyzing adaptive possibilities of agents in multi-agents system, we have discovered new aspects of ambient intelligence in distributed modular systems using intelligent building blocks (I-BLOCKS) [1]. This paper describes early scientific researches related to technical design, applicable experiments and evaluation of adaptive processing and information interaction among I-BLOCKS allowing users to easily develop ambient intelligence applications. The processing technology presented in this paper is embedded inside each DUPLO1 brick by microprocessor as well as selected sensors and actuators in addition. Behaviors of an I-BLOCKS modular structure are defined by the internal processing functionality of each I-Blocks in such structure and communication capacities between I-BLOCKS. Users of the I-BLOCKS system can do 'programming by building' and thereby create specific functionalities of a modular structure of intelligent artefacts without the need to learn and use traditional programming language. From investigating different effects of modem artificial intelligence, I-BLOCKS we have developed might possibly contain potential possibilities for developing applications in ambient intelligence (AmI) environments. To illustrate these possibilities, the paper presents a range of different experimental scenarios in which I-BLOCKS have been used to set-up reconfigurable modular systems. The paper also reports briefly about earlier experiments of I-BLOCKS in different research fields, allowing users to construct AmI applications by a just defined concept of modular artefacts [3].

• Journal of Gastric Cancer
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• 제11권4호
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• pp.206-211
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• 2011

Purpose: Laparoscopic total gastrectomy (LTG) for gastric cancer is still uncommon because of technical difficulties, especially in esophagojejunostomy (EJ). There are many reports for various laparoscopic procedures of EJ using linear or circular staplers. On the other hands, there has been no report for hand-sewn anastomosis. We report successfully performed intracorporeally hand-sewn EJ after LTG. Materials and Methods: The clinicopathologic data and short-term surgical outcomes of 6 patients who underwent totally laparoscopic total gastrectomy for upper gastric cancer from December 2010 and July 2011 were retrospectively reviewed. Results: The mean age was 66.5 years and mean body mass index (kg/$m^2$) was 24.6. All patients had medical comorbidities. The mean patient ASA score was 2.17. Among the 6 patients, previous abdominal operation was performed for 2 patients and combined operation was performed for 3 patients. The mean blood loss, operation time, and EJ anastomosis time was 130 ml, 379.7 minutes, and 81.5 minutes, respectively. The mean time to first flatus, first oral intake, and postoperative hospital stay was 3.0, 3.0, and 12.5 days, respectively. There was no 30-day mortality case. Postoperative aspiration pneumonia and multiple periventricular lacunar infarctions developed in 1 patient. There were no anastomosis-related complications and other major surgical complications. Conclusions: When the intracorporeal anastomotic technique becomes popular in LTG the intracorporeally hand-sewn EJ may be accepted as one method among the various laparoscopic procedures of EJ.

• 수면정신생리
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• 제5권1호
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• pp.1-11
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• 1998

Chronobiology is the area of medicine that is, how time-related event shape our daily biologic responses and apply to any aspect of medicine with regard to altering pathophysiology and treatment response. In mammals, there are several evidences that prove suprachiasmatic nuclei(SCN) is the major circadian pacemaker and the circadian rhythm influences so many biological aspects of an living organism such as rest-activity, thermoregulation, reproduction, and endocrine system. In case of human beings, there had been little information of circadian system. That may be due to the experimental, technical difficulties to study but also to the fact that human has the more complex environments that may alter the circadina rhythm like the artificial light, many socio-cultural aspects and so forth. However, several reports of these days indicate human's circadian system is composed of two or more circadian oscillators and SCN is the major circadian oscillator among them like the other mammals. Free-running circadinan period of mankind is about 24 hours rather than about 25 hours, and rest-activity rhythm is polymodal like other species. In addition to that, human may have capcities to change the circadian rhythm as the seasonal changes of daynight schedule. In this article, the author will summarize recent progress of anatomy and physiology of the circadian clock mechanism in humans.

• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 2002년도 제20회 동계학술발표회 논문집
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• pp.269-296
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• 2002

본 논문은 기업간 전자상거래(Business to Business Electronic Commerce)의 비즈니스 모델의 분류체계를 새로이 고안하여 제안하고 있다. 인터넷과 정보통신기술의 발달은 기존의 기업간 거래 관계를 혁신시킬 기업간 전자상거래라는 새로운 패러다임을 등장하게 했다. 기업간 전자상거래는 새로이 발전해 가는 사업 영역으로서 학계와 업계의 많은 주목을 받고 있으나 아직 학문적으로는 연구가 미진하여 비즈니스 모델의 유형조차도 정립되어 있지 않아 향후 활발한 연구가 기대된다. 본 논문은 아직 초기 단계인 기업간 전자상거래 관련 일반문헌 및 연구문헌의 분석과 정리를 통해 종합적 관점의 비즈니스 모델 구성 체계를 제시하고 있다. 비즈니스 모델 구성도는 1) 거래 구조 및 운영 주체 2) 취급 품목 (산업 범위) 3) 거래 방식 4) 수익원의 4 가지 분류 기준으로 이루어져 종합적 관점에서 해당 비즈니스 모델을 평가하게 하며 '비즈니스 모델 하우스'라 칭하고 있다.

• Coupled systems mechanics
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• 제6권1호
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• pp.97-111
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• 2017

The present paper reports an analytical study of delamination fracture in the Mixed Mode Flexure (MMF) functionally graded beam with considering the material non-linearity. The mechanical behavior of MMF beam is modeled by using a non-linear stress-strain relation. It is assumed that the material is functionally graded along the beam height. Fracture behavior is analyzed by the J-integral approach. Non-linear analytical solution is derived of the J-integral for a delamination located arbitrary along the beam height. The J-integral solution derived is verified by analyzing the strain energy release rate with considering the non-linear material behavior. The effects of material gradient, crack location along the beam height and material non-linearity on the fracture are evaluated. It is found that the J-integral value decreases with increasing the upper crack arm thickness. Concerning the influence of material gradient on the non-linear fracture, the analysis reveals that the J-integral value decreases with increasing the ratio of modulus of elasticity in the lower and upper edge of the beam. It is found also that non-linear material behavior leads to increase of the J-integral value. The present study contributes for the understanding of fracture in functionally graded beams that exhibit material non-linearity.

• Advances in concrete construction
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• 제3권1호
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• pp.1-14
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• 2015

China accounts for nearly half of the global steel production. As a waste material or a by-product in the manufacture process, a large amount of blast furnace slag is generated every year. The majority of recycled blast furnace slag is used as an additive in low-grade blended cement in China (equivalent to the UK CEM II or CEM III depending on the slag content). The cost of using ground granulated blast furnace slag (GGBS) in such low-grade applications may not be entirely reimbursed based on market research. This paper reports an on-going project at Xi'an Jiaotong-Liverpool University (XJTLU) which investigates the feasibility of using GGBS in long-span concrete structures by avoiding/reducing the use of crack control reinforcement. Based on a case study investigation, with up to 50% of CEM I cement replaced with GGBS, a beneficiary effect of reduced thermal contraction is achieved in long-span concrete slabs with no significant detrimental effect on early-age strengths. It is believed that this finding may be transferable from China to other Asian countries with similar climates and economic/environmental concerns.

• 대한족부족관절학회지
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• 제24권4호
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• pp.165-167
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• 2020

Failure to achieve stable fixation during surgery for a Lisfranc joint injury leads to subtle instability that causes dysfunction and posttraumatic osteoarthritis. Therefore, it is important to check for appropriate fixation during surgery. This paper reports a test that evaluates the joint instability dynamically during the open reduction of the Lisfranc joint and checks the stability after fixation. a Freer elevator was inserted into the interosseous area between the medial cuneiform and second metatarsal base, and a twisting force was applied to evaluate the dynamic instability of the Lisfranc joint. After fixation of the Lisfranc joint, the stability of the fixation could be tested by trying this maneuver with the Freer elevator. Overall, the Freer test can be considered a valuable test in open surgery for a Lisfranc joint injury.

• 동아시아경상학회지
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• 제9권1호
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• pp.41-51
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• 2021

Purpose - The purpose of this study is to propose strategies of improving efficiency of 20 listed port companies in China based on analysis of their input-output indexes from 2014 to 2018. Research design, data, and methodology - In this paper, the relevant input-output indicators of 20 listed port companies in China from 2014 to 2018 were adopted. Data derived from the company annual reports announced by Shanghai stock exchange and Shenzhen stock exchange. Comprehensive efficiency and pure technical efficiency were measured from output perspective by DEA and Malmquist index, and efficiency changes and regional efficiency were analyzed. Result - The results showed that the efficiency value of 20 listed port companies in China fluctuated and increased during 2014-2018, regional efficiency was unbalanced, and change of MPI was influenced by internal factors and external factors. Listed port companies affected by internal and external factors needed to make appropriate response to internal and external factors. Conclusion - The research conclusion can provide important reference information about management and planning for port companies in China and related areas. However, this paper is limited to the availability of data. So the improvement scheme for listed companies in inefficient regional ports needs further study, such as using AHP method.

• Fisheries and Aquatic Sciences
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• 제24권12호
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• pp.394-399
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• 2021

Song-Gang^® bio-stone (SGS) is a microporous crystalline hydrated aluminosilicate which has found various applications because of their very unique physiochemical characteristics such as ion exchange and absorptive-desorptive properties. Significant progress has been made in recent years on applications of these inorganic adsorbents in different industries including agriculture, aquaculture, water and wastewater treatment. This review article intends to summarize the published reports on the applications of SGS in aquaculture industry. SGS application as a feed additive to enhance fish growth and promote their health and nutritional parameters is the most important discussed areas. According to the technical data that are discussed in this review, SGS should be considered as a material with tremendous potential for application in the aquaculture industry. Considerable amounts of research works are under way to explore other opportunities for application of SGS to benefit aquaculture industry.