• 한국통신학회논문지
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• 제31권5A호
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• pp.441-450
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• 2006

최근 인터넷 사용자가 급증함에 따라 전체 인터넷 트래픽의 90%이상을 차지하는 IP 트래픽이 통신망 성능에 미치는 영향은 매우 크다. 따라서 효율적인 망의 설계와 설계된 망의 정확한 성능 평가를 위하여 IP 트래픽의 특성을 반영한 자기유사성(self-similarity) 트래픽 발생기의 설계는 매우 중요하다. 본 논문에서는 OPNET을 이용하여 자기유사성 트래픽 발생기를 설계한다. 이를 위해 Pareto 분포를 갖는 ON-OFF 소스를 이용하고, 이를 다중화하여 중첩시킴으로써 자기유사성의 특성을 구현하였다. 또한 구현한 자기유사성 트래픽 발생기의 성능 평가를 위하여 다양한 통계학적인 접근방법을 통해 자기유사성의 특성을 분석 검증하고, 입력부하 및 다중화 된 소스의 개수에 따른 영향을 분석하였다. 설계된 자기유사성 트래픽 발생기는 유무선 통신망 모델 구현 및 성능 평가 시 IP 트래픽 발생기로 활용될 수 있으며, 자기유사성 트래픽 모델링에서 요구되는 구체적인 파라미터 값의 결정에도 도움이 될 것으로 기대된다.

• 지역사회간호학회지
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• 제1권1호
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• pp.582-594
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• 1989

The purpose of this study is to analyze the factors affecting the school health teachers' self-confidence. This study was conducted with 87 school health teachers working in Jeonbuk province, from September to December, 1986, The results are follows; 1. Demographic characteristics of school health teachers 1) Age mean ; 34, range; 23-54 2) School Nursing experience mean; 11 years, range; 0-24 3) Clinical experience mean; 1.5 years, range: 0-13 2. Status of school health resources & nursing activities 1) Personnel resource school health teacher: pupils : 1 : 1,436 'classes=1:31 'general teacher=1:39 2) Budget Total school operating budget: School health budget : 100 : 4.2 (52.2 thousand Won) Half of the school health budget expend on medicine. 3) Clinic 80% of all schools have health clinic seperately. 71.32 of all schools have less than $35m^2$, 23.9%, $36-66m^2$. 4) Only 20% of all schools have organization for health 5) Average of clinic visitor for 1 year; 2,084 Major problem is on digestive system. And other problem: respiratory, skin, musculo - skeletal system, dental problem, etc... 6) Literal message for 1 year; 12 times. For health education (4), vaccination (3), examination of parasites (2), etc... 3. The degrees of the school health teachers' self-confidence 1) Program planning & evaluation; 2.9. 2) Clinic management; 2.8 3) Health education; 2.8 4) Management of school environment; 2.7 5) Health care services; 2.5. 6) Operating of school health organization; 2.3 4. Significances to self-confidence on school health nursing activities 1) Program planning & evaluation: home message (r=.228, p<.05) No. of clinic visitor (r=.220, p<.05) expending time for clinic management (r=.229, p<.05) religion (t: 2.5, p<.05) level of school (F=6.3, p<.005) 2) Clinic management: age of school health teacher (r=-.202, p<.05) school health experience (r=-.211, p<.05) salary step (r=.187, p<.05) expending time for clinic management (r=.315, p<0.1) marital status (t=3.97, p<.005) level of school (F=3,139, p<0.5) 3) Management of school environment: level of school (F=3.899, p<.05) expending time for clinic management (r=-,216, p<0.5) 4) Health care service: age of school health teacher (r=-.186, p<.05) marital status (t= 3.67, pH.005) 5) Health education: expending times for clinic management (r=-.252, p<05) level of school (F=5.343, p<.01) 6) Operating of health organization; age of school health teacher (r=-.258, p<.01)salary step (r=.188, p<.05) Based on the above results, the suggestions are as follows; 1. Need to raise ,appointment rate school health teacher. 2. Need to raise self-confidence on school health nursing activities through the inservice education or re-inforcement. 3. Need to secure adequate budget for school health. 4. Participation of school health teacher and support of school master for school health services are required. 5. Need for use the health clinic seperately, adequate facilities and free utilization by visitors.

• 제어로봇시스템학회논문지
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• 제17권1호
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• pp.22-30
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• 2011

Plane detection is very important information for mission-critical of robot in 3D environment. A representative method of plane detection is Hough-transformation. Hough-transformation is robust to noise and makes the accurate plane detection possible. But it demands excessive memory and takes too much processing time. Iterative randomized Hough-transformation has been proposed to overcome these shortcomings. This method doesn't vote all data. It votes only one value of the randomly selected data into the Hough parameter space. This value calculated the value of the parameter of the shape that we want to extract. In Hough parameters space, it is possible to detect accurate plane through detection of repetitive maximum value. A common problem in these methods is that it requires too much computational cost and large number of memory space to find the distribution of mixed multiple planes in parameter space. In this paper, we detect multiple planes only via data sampling using Self Organizing Map method. It does not use conventional methods that include transforming to Hough parameter space, voting and repetitive plane extraction. And it improves the reliability of plane detection through division area searching and planarity evaluation. The proposed method is more accurate and faster than the conventional methods which is demonstrated the experiments in various conditions.

• Journal of Biosystems Engineering
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• 제43권4호
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• pp.362-368
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• 2018

Purpose: Self-sufficiency in paper production is desired in Nigeria. This study was aimed at evaluating the performance of a locally fabricated batch pulp digester. Methods: The pulp yields of sheaths generated as waste in the production of bamboo (Bambusa vulgaris) laminates were determined at different liquor concentrations and treatment time after preliminary experiments to ascertain the conditions under which the sheath started to pulp. Moreover, the optimum pulping conditions and fiber characteristics were determined and estimated, respectively, to ascertain the pulp fiber suitability for paper production. Results: An optimum pulp yield of 65.1% was obtained at 50% NaOH and 25% $Na_2S$ liquor concentration (w/w) when the cooking time was 4 h. The results of fiber characterization of the pulp indicated an average fiber length of 2.19 mm with a low Runkel ratio of 1.63, both of which signify the suitability of the pulp for medium quality paper production. Conclusions: Softwood pulp can be blended with the fibers to improve the strength of the produced paper; further investigation should be carried out to use other non-woody plants for pulp and papermaking.

• 대한간호학회지
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• 제51권3호
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• pp.265-279
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• 2021

Purpose: This study examined the impact of a drinking reduction program on drinking motivation, drinking refusal self-efficacy, and problematic drinking behaviors in college students with problematic drinking habits. Methods: This study incorporated a non-equivalent control group prepost-test design. Study participants included 58 college students who scored 12 or more in the AUDIT-K test (Alcohol Use Disorders Identification Test-Korean version) (experimental group: 30; control group: 28). The intervention consisted of eight sessions and was conducted once a week. It was designed to promote autonomy, competence, and relatedness-the three elements of basic psychological needs in self-determination theory. The participants were assessed before the intervention, immediately after, and four weeks post intervention. Data were collected from October 12 to December 31, 2017. The analysis employed the chi-square test, Fisher's exact test, independent t-test, and repeated measures ANOVA using SPSS/WIN 22.0. Results: The mean age of participants was 21.8 years. There were 30 men (51.7%) and 28 women (48.3%). The differences in drinking motivation, drinking refusal self-efficacy, and problematic drinking behaviors were statistically significant for the group by time interaction (F = 42.56, p < .001; F = 54.96, p < .001; F = 39.90, p < .001, respectively). Conclusion: The findings indicate that the intervention effectively decreases drinking motivation, increases drinking refusal self-efficacy, and decreases problematic drinking behaviors. It can be an efficient strategy for college students with problematic drinking habits to enhance their self-determination ability.

• 한국학교수학회논문집
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• 제6권1호
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• pp.65-85
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• 2003

본 연구의 목적은 '수학교과에 배당된 한 시간의 수업을 어떻게 하면 가장 효율적으로 할 수 있을까\ulcorner'라는 연구과제에 대하여 자기주도적 수준별 학습지를 개발하여 활용함으로써 학생들의 학업 성취도를 높이고 STAD 협동학습을 적용하여 수업을 진행한 다음, STAD 형성평가를 통하여 수학적 문제 해결력을 신장시키고자 함에 있다. 이러한 목적을 위해 다음과 같은 연구를 하였다. 첫째, 기존의 교과서 위주의 수업을 탈피하고자 교과내용 요약, 기본문제, 발전문제, 심화문제로 이루어진 자기주도적 수준별 학습지를 개발 적용하였다. 둘째, 집단의 목표가 분명하고, 개별적인 책무성이 중요하며, 성공의 기회가 균등하고, 소집단간의 경쟁이 유발되는 STAD 협동학습 모델을 선택 적용하였다. 또한 소단원이 끝날 때마다 실시하는 STAD 형성평가지를 이용한 평가를 EXCEL의 점수 자동환산표에 삽입하여 결과를 그 즉시 공고하였다. 실험 수업의 결과는 실험수업 대상의 선정 및 크기가 제한되어 있고 실험기간이 단기간이므로 문제점으로 지적될 수 있으나, 어떤 학생도 열외 됨이 없이 자율적인 소집단간의 경쟁을 유도하여 학업성취 의욕을 높일 수 있었다는 점에서 유의미한 변화가 있는 것으로 나타났다. 위와 같은 연구 결과, 자기주도적 수준별 학습지를 이용한 STAD 협동학습이 학생들에게 흥미를 유발시키고 수학적 문제 해결력을 신장시켜 학업 성취도를 높일 수 있었다. STAD 협동학습은 방법이 쉽고 절차도 간단하여 협동학습을 처음 적용하는 교사가 사용하기 좋고, 보상 체제의 구조가 열린 교육이 추구하는 활발한 동료 간의 상호작용과 학습 동기를 촉진시켜 준다. 아울러 다양한 소집단 협동학습 중 STAD 협동학습 모형이 수학 수업에 보다 발전적으로 널리 적용되기를 기대한다.

• 한국CDE학회논문집
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• 제21권3호
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• pp.281-295
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• 2016

Lately, the management of domestic BIM performance is quite lacking, as the evaluation and management data from successful cases of BIM implementation both on projects and in companies, and related effects (time, cost and other physical gains) are not well kept for future use in BIM development. In order to overcome the above obstacles, a systematic approach to evaluating BIM adoption with focus on particular elements like BIM implementation environment and processes, and the physical factors yielded by BIM, is necessary. In this study, objective and detailed assessment indicators and weights that are appropriate for the domestic situation were derived through research for purposes of developing a web-based BIM maturity measurement program that is tailor-made for the Korean construction atmosphere. Through a company's self-maturity measurement, excellent quality of BIM deliverables and output can be achieved and managed. Furthermore, the domestic BIM capacity can gradually increase since design firms' BIM capability can be judged during procurement basing on measurement indicators.

• 한국생활과학회지
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• 제12권5호
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• pp.605-618
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• 2003

The purpose of this study was to develop the household analysis and diagnosis program for the enhancement of family welfare focusing on the household of middle-aged full-time housewives. From the review of related literatures, the following areas of total family life were selected ; household management, time use, housing, household materials, finance, communication and decision making. Considering that the program subjects were middle-aged full-time housewives, the preparation for elderly life and the identity as housewife, one of the healthy family members, are appended. The progresses for the development of household analysis and diagnosis program were as follows: 1. to select the useful area of family life, 2. to make the indicators which explain the status of family life, and 3. to decide the scales for the diagnosis. This program has various uses such as the development of self-evaluation program, program for various family life course. Through this program the strength and weakness of family life can be found and the planning for the enforcement of family life can be practiced.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권3호
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• pp.1189-1204
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• 2018

Detecting and capturing 3D human structures from the intensity-based image sequences is an inherently arguable problem, which attracted attention of several researchers especially in real-time activity recognition (Real-AR). These Real-AR systems have been significantly enhanced by using depth intensity sensors that gives maximum information, in spite of the fact that conventional Real-AR systems are using RGB video sensors. This study proposed a depth-based routine-logging Real-AR system to identify the daily human activity routines and to make these surroundings an intelligent living space. Our real-time routine-logging Real-AR system is categorized into two categories. The data collection with the use of a depth camera, feature extraction based on joint information and training/recognition of each activity. In-addition, the recognition mechanism locates, and pinpoints the learned activities and induces routine-logs. The evaluation applied on the depth datasets (self-annotated and MSRAction3D datasets) demonstrated that proposed system can achieve better recognition rates and robust as compare to state-of-the-art methods. Our Real-AR should be feasibly accessible and permanently used in behavior monitoring applications, humanoid-robot systems and e-medical therapy systems.

• Nuclear Engineering and Technology
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• 제47권6호
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• pp.700-711
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• 2015

Sodium-cooled fast breeder reactors use liquid sodium as a moderator and coolant to transfer heat from the reactor core. The main hazard associated with sodium is its rapid reaction with water. Sodium-water reaction (SWR) takes place when water or vapor leak into the sodium side through a crack on a heat-transfer tube in a steam generator. If the SWR continues for some time, the SWR will damage the surface of the defective area, causing it to enlarge. This self-enlargement of the crack is called "self-wastage phenomena." A stepwise numerical evaluation model of the self-wastage phenomena was devised using a computational code of multicomponent multiphase flow involving a sodium-water chemical reaction: sodiumwater reaction analysis physics of interdisciplinary multiphase flow (SERAPHIM). The temperature of gas mixture and the concentration of NaOH at the surface of the tube wall are obtained by a numerical calculation using SERAPHIM. Averaged thermophysical properties are used to assess the local wastage depth at the tube surface. By reflecting the wastage depth to the computational grid, the self-wastage phenomena are evaluated. A two-dimensional benchmark analysis of an SWAT (Sodium-Water reAction Test rig) experiment is carried out to evaluate the feasibility of the numerical model. Numerical results show that the geometry and scale of enlarged cracks show good agreement with the experimental result. Enlarged cracks appear to taper inward to a significantly smaller opening on the inside of the tube wall. The enlarged outer diameter of the crack is 4.72 mm, which shows good agreement with the experimental data (4.96 mm).