• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.1
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• pp.225-232
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• 2013

In this paper, we introduce a method that can be used to select the position of head node for context-awareness information. The validity of the head node optimal location is saving the energy in the path according to the clustering. It is important how to elect one of the relay node for energy efficiency routing. Existing LEACH algorithm to elect the head node when the node's energy probability distribution function based on the management of the head node is optional cycle. However, in this case, the distance of the relay node status information including context-awareness parameters does not reflect. These factors are not suitable for the relay node or nodes are included in the probability distribution during the head node selects occurs. In particular, to solve the problems from the LEACH-based hierarchical clustering algorithms, this study defines location with the status context information and the residual energy factor in choosing topology of the structure adjacent nodes. The proposed ECOPS (Energy Conserving Optimal path Schedule) algorithm that contextual information is contributed for head node selection in topology protocols. This proposed algorithm has the head node replacement situations from the candidate head node in the optimal path and efficient energy conservation that is the path of the member nodes. The new head node election technique show improving the entire node lifetime and network in management the network from simulation results.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.278-280
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• 2012

We are propose the position of the node context-awareness information and the validity of the head node in the path according to the clustering how to elect one of the energy efficiency ECOPS (Energy Conserving Optimal path Schedule) algorithm. Existing LEACH algorithm to elect the head node when the node's energy probability distribution function based on the management of the head node is optional cycle. However, in this case, the distance of the relay node status information including context-awareness parameters does not reflect. These factors are not suitable for the relay node or nodes are included in the probability distribution, if the head node selects occurs. In particular, to solve the problems from the LEACH-based hierarchical clustering algorithms, this study defines location with the status context information and the residual energy factor in choosing topology of the structure adjacent nodes. ECOPS algorithm that contextual information is contributed for head node selection in topology protocols. The proposed ECOPS algorithm has the head node replacement situations from the candidate head node in the optimal path and efficient energy conservation that is the path of the member nodes. The new head node election show as the entire node lifetime and network management technique improving the network lifetime and efficient management the simulation results.

• Journal of the Korean Home Economics Association
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• v.26 no.1
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• pp.83-96
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• 1988

科學의 발전과 經濟의 高度成長으로 食生活의 向上은 人間의 수명을 크게 연장시키고 있다. 韓國에 있어서도 이러한 傾向은 같은 樣相이며 더욱이 보건형태가 차차 변경되어 가고 있다. 女性의 平均수명은 男性보다 길며 近來에 이르러 女性人口의 95%가 閉經을 經驗할 때까지 生存하고 있다고 한다. 이러한 실정임에도 불구하고 우리나라 女性의 閉經年令, 更年期에 處한 婦人들의 건강 및 營養攝取狀態, 食生活 態度등에 關한 情報가 파악되어 있지 않고 있다. 本 硏究는 이 點을 감안하여 우리나라의 中年女性의 건강管理의 指針을 세우기 위하여 생물학적 요인 및 환경적 요인이 閉經年令 및 更年期婦人의 건강狀態와 食行動에 어떠한 영향을 미치는지를 검토하여 보았다. 本 硏究는 1980년 12월에서 1981년 2월까지 3개월간 韓國의 2個의 大都市와 5個의 小都市에 거주하는 40歲에서 60歲까지의 女性을 대상으로 설문지를 통해 다음과 같은 사항을 조사하였다. 조사내용으로 1) 폐경연령, 주거환경, 사회경제적 조건, 체위, 임신횟수, 유산경험의 유무 2) 건강상태, 갱년기 자각증상, 유경시 월경의 순, 불순상태 그리고 3) 영양섭취상태와 식행동 등이다. 本論文은 調査內容 中 第 2 報로 更年期女性의 영양섭취상태와 식생활 행동 그리고 更年期 현상과의 關係를 關例시켜 검토하였다. 간이식품 섭취 사항 조사표를 사용하여 영양소의 섭취상태를 조사한 결과 大都市群은 energy, 지방, thiamin 및 ascorbic acid 의 섭취상태가 그 對照群에 比하여 높은 경향을 나타냈다. 열양 구성비에 대한 검토를 보면 糖質:蛋白質:脂肪(C:P:E)의 比가 64~67%:14%:19%~22%였으며 大都市群은 小都市群에 比해 脂肪에서의 energy섭취가 유의적으로 높았다. 더욱이 사회 경제적 측면으로 보아도 지방섭취는 저소득층에서 낮은 경향을 보여주었다. 更年期女性의 음식에 대한 기호變化의 검토를 통해 관찰한 것에 의하면 閉經者가 未閉經者에 比해 더 많이 食品嗜好의 變化를 경험하고 있다고 지적\ulcorner\ulcorner있다. 37.4%와 28.1%가 각기 기호의 變化를 경험하고 있었으며 이는 兩群間에 有意차가 높음을 보여주었다. 閉經 후 2年頃부터 食品의 嗜好變化를 느끼고 있다고 하는 사람이 많았으며 음식은 기름기 있는 것보다 담백한 것, 肉類보다는 生鮮, 果實, 野菜를 더 선호하는 경향이라고 하였다. 자극성이 있는 것에서 덜 자극성 있는 것을 찾는 경향이었다. 이들의 食品선택구조를 파악하는 것은 그 지역의 특수한 영양문제뿐만 아니라 그들의 영양교육, 더 나아가서는 그 지역의 식량영양정책 수립을 위해 중요한 정보를 제공할 수 있다. 大都市群은 肉類, 卵類, 乳類 및 그 製品등의 선택과 빵이나 butter 등의 食品과 正의 相關性을 나타내고 있었으나(p<0.01) 김치와 같은 韓國의 傳統的 食品의 선택時는 乳類, 果實, 빵과 같은 近代的 感覺의 食品과는 負의 相關性을 나타냈다. 한편 김치는 밥 및 기타 곡류 그리고 서류와는 正 相關性을 시사하였다. 小都市群은 對照群과는 多少 상이한 식품선택 구조를 보이고 있다. 즉 卵類나 乳類를 섭취할 수 있는 사회경제적 조건, 그리고 기호를 갖는 사람들은 서류를 제외한 모든 식품과 正의 相關性을 나타냈다. 어느 群이든 밥과 김치는 높은 相關性을 나타내고 있으며, 이 두 식품은 韓國人의 食生活의 基本이 되고 있으며 이를 土臺로 다른 食品의 선택은 地域的, 社會經濟的, 그리고 個人의 기호에 따라 다르게 나타난다는 것이 시사되었다. 閉經前 後의 更年期라는 것은 30餘年 間의 性 hormone의 周期的分泌에 依한 月周期가 停止하는 時期이며, 內分泌環境의 變化에 依한 生體 리듬의 異常은 各種 更年期증상의 원인이 되고 있다. 有經時의 月經주기의 이상을 경험하는 사람에게 특히 更年期증상中 食慾不振이나 不眠 등의 不平 數가 많았다. 이러한 점으로 미루어 보아 estrogen과 食慾과의 相關性은 높음이 시사되었다. 이는 不眠症과는 연관성이 있으며 性홀몬 分泌의 亂脈은 食事攝取의 리듬을 흐틀어 놓으며 이것이 生體리듬의 變化를 유발한다고 본다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.9
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• pp.9-17
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• 2017

Ensuring the safety of automobiles and trains during system operation is regarded as indispensable due to the progress in unmanned operation. The automotive functional safety standard, ISO 26262, has been proposed to ensure the safe design of vehicles. This standard describes in detail the required risk analysis and evaluation procedure and safety measures, while appropriately reflecting the system design information. Therefore, much research has been done on the risk analysis procedure, wherein the design information is mostly extracted from physical components of similar systems already in operation, the information traced back to obtain constituent functions, and then methods of identifying risk sources are studied. This method allows the sources of risk to be identified quickly and easily, however if the design requirements are changed or systems are newly developed, others may be introduced which are not accounted for, thereby yielding mismatched design information. To resolve this problem, we propose a top-down analysis in order to utilize the system design information appropriately. Specifically, a conceptual system is designed to obtain the functions, which are then analyzed. Then, a function-based fault tree analysis is conducted, followed by a risk source analysis. In this paper, a case study of automotive safety is presented, revealing that the proposed method can analyze the risk sources with reduced possibility of omission by systematically reflecting the system design information.

• The KIPS Transactions:PartA
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• v.18A no.3
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• pp.81-92
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• 2011

There has been a number of attempts to apply 3D CAD data created in the design stage of product life cycle to various applications of the other stages in related industries. But, 3D CAD data requires a large amount of computing resources for data processing, and it is not suitable for post applications such as distributed collaboration, marketing tool, or Interactive Electronic Technical Manual because of the design information security problem and the license cost. Therefore, various lightweight visualization formats and application systems have been suggested to overcome these problems. However, most of these lightweight formats are dependent on the companies or organizations which suggested them and cannot be shared with each other. In addition, product structure information is not represented along with the product geometric information. In this paper, we define a dataset called prod-X3D(Enhanced X3D Dataset for Web-based Visualization of 3D CAD Product Model) based on the international standard graphic format, X3D, which can represent the structure information as well as the geometry information of a product, and propose a translation method from 3D CAD data to an prod-X3D.

• Journal of the Korea Society of Computer and Information
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• v.17 no.2
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• pp.215-224
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• 2012

This study performs an exploratory investigation of the needs of the customers who use academic information service from a research institute, K, that provides information services for domestic academic institutions of natural science and technology. K institute is planning customized services in order to improve customer satisfaction on the academic information service And therefore, the institute begins the research on customer needs analysis and customer segmentation. The research is regarded as well-timed, because CRM implementation in public organizations has been activated recently. Data mining and data warehousing techniques were used for pilot analyses. For the purpose of customer segmentation, a mixed segmentation model, which adds product life cycle concept to the 'balanced customer segmentation' model, which in turn considers the value of customers from the organizational viewpoint and the value of organizations from the customer's viewpoint, simultaneously, was applied. The result of investigation indicated that, in the case of K, 'balanced customer segmentation' and 'contents reach approach' which uses data warehouse/OLAP, rather than those customer segmentation techniques that are often used within the industry, are the more potent ways of approach. This exploratory case study is expected to provide a useful guideline for 'deriving an organizationally unique CRM model' that recently is one of the hot topics in the CRM area.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.48 no.4
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• pp.43-50
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• 2011

Sensor networks are expected to play key roles in establishment of fundamental infrastructures, information collection, and devices control to provide services for ubiquitous society in the near future, where recent issues include energy efficient energy supply scheme in the sensor network based systems has been getting more attention. This paper formulates an energy supply problem that minimizes the total energy supplied to clustered sensor networks while maintaining the network lifetime. An energy supply scheme is suggested that determines the the amount of engergy supply to each cluster head based on the solution of the problem. Simulation results show that the proposed scheme achieves better energy efficiency compared with a simple scheme of maximum possible energy supply to each cluster head.

• Journal of IKEEE
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• v.16 no.3
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• pp.274-282
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• 2012

In this paper, we propose the design of lighting control algorithm for intelligent LED lighting system. The proposed lighting control algorithm transmitted to MCU through a data bus the environmental information detected from respectively sensor node. The MCU control software was designed to determine the level maintained to depending on the set control method by comparing the results that calculated the dimming level using a signal value. Also, it was designed to be lighting by cross-performed periodically the rotation and reverse method by created fully symmetrical pattern using the control algorithm to LED lighting device. In this paper, the proposed lighting control algorithm improved the reliability of the data sent by designed the system that can be controlled lighting to stable, and it was maintained the event delivery ratio of 91%. Also, the lighting device was decreased the luminous intensity of 32%, the power consumption of 49%, and heat generation of 32%. As a result, it were could be improved the energy efficiency that the life-cycle of LED has been increased 50%.

• Journal of the Korean Data and Information Science Society
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• v.28 no.5
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• pp.1145-1152
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• 2017

Environmental tests are used to verify an equipment that can withstand the rigors of harsh environments. In general, military products have lots of experiences with extreme environment compared to commercial products. Therefore, the military products used in mountains require a tailoring process about temperature drop for the environmental test. The International Organization for Standardization publishes that the coefficient of temperature drop is $-6.5^{\circ}C/1000m$ from all around the world. However, there is no the criteria in the South Korea. In this paper, we calculate the coefficient of temperature drop. Also, an equation used as a tailoring process for a low temperature test of the products has been suggested.

• Journal of the Korean Data and Information Science Society
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• v.27 no.6
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• pp.1593-1600
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• 2016

This paper suggests a temperature guidance for requirements which must be addressed in the preparation of specifications for military equipment used in land applications in the Korean peninsula. In general, the equipment should be designed to operate during all but a certain small percentage of the time. Daegu and Yangpyeong are the hottest and coldest regions by month, respectively, based on surface weather observations over 132 regions from 1904 to 2014. The 1-percent high and low temperatures for land environment in the South Korea are $38.7^{\circ}C$, and -$29.0^{\circ}C$, respectively. This paper also presents the temperature values occurring for specified frequencies of occurrence during the most severe month. Diurnal cycles associated with the hottest and coldest top one-percent temperatures, including associated solar radiation, relative humidity, and wind-speed are provided.