• Journal of Nutrition and Health
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• 제30권4호
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• pp.386-393
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• 1997

This experiment was performed to investigate the effect of different dietary lipids on the risk factors of coronary vascular disease(CVD) in ovariectomized rats. female rats of Sprague-Dawley stram were divided into sham-operated(sham) and ovariectomized(ovx) groups and then each group was divided into a beef fallow group, a soy bean oil group and a fish oil group. After 16 weeks of feeding on experimental diets, animals were sacrificed and blood, liver, kidney and perirenal fat pad were obtained. Food intake and weight gain of fish oil group were significantly lower than other dietary lipid groups. food intake and weight gain tended to be higher in ovx groups than in sham groups. The weight Index(g/100g body weight) of liver and kidney was higher in the fish oil group than the other groups and weight index was lower in ovx groups compared to sham groups. The weight of the perirenal fat pad was the highest in the beef tallow group and the lowest in the fish oil group. The fish oil group showed the lowest total cholesterol(TC) and triglyceride (TG) levels in serum. Serum TG levels were lower in all ovx groups than in sham groups, but serum TC levels were not influenced by ovariectomy. fatty acid composition of serum reflects the recent dietary Intake of fat. Linoleic acid content was tile highest in soy bean oil group and eicosapentaenoic acid(EPA) and docosahexaenoic acid(DHA) contents were the highest in fish oil group. fatty acid composition of adipose tissue, especially EPA and DHA contents in perirenal fat pad, was highest in the fish oil group. Saturated fatty acid(SFA) and monounsaturated fatty acid(MUFA) in serum and adipose tissue did not reflect fatty acid intake. The activities of glucose-6-phosphate dehydrogenase, a lipogenic enzyme, in the blood of the beef tallow and soybean oil groups showed the tendency to be high and that of the fish oil group to be low in ovx. Carnitine acetyltransferase, a lipolytic enzyme, showed the highest activity in the liver of the fish oil group and was least active in the soy bean oil group.

• 모자간호학회지
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• 제1권
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• pp.23-33
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• 1991

Recently, Cesarean Section has been revealed as major events in maternity nursing, because it has influence on tile formatter of the self concept of cesarean section mothers as well as later coping mechanism and mother-child relationship including the mothering role. The study is conducted to clarify the relationships between the perceired family support and the self concept of cesarean section mothers, and to find out other Influencing factors on the formation of the self concept. Measuring instrument used in this study was Lee's scale to measure the self concept and the degree of perceived family support of the cesarean section mothers, The subject were 155 cesarean section mothers who were selected conveniently. Volunteers answered self reporting questionnaires which asked about their self concept. Data was analyzed as follows using SAS. The relationship between scores of the self concept and degree of the perceived family support was analyzed by Pearson's product moment correlation. In order to identify the influencing effects of demographic variables on the formation of self concept & F test were used. Result were summarized as follows : 1. Scores of self concept of cesarean section mothers were significantly correlated with scores of the perceived family support (r=0.3438, p<0.01) These results show that the family support is closely related to the self concept of cesarean mothers and has positive effects on their coping capacity. 2. Scores of self-concept of those who have lower ducation background and are multipara were significantly higher than those who have higher education background and are primipara(M=29.90$\pm$9.37, 27.69$\pm$3.89, t=2.006, df=105.8, p=0.0480: M=27.75$\pm$3.49. 29.46$\pm$8.68, t=-1.7183, 2. p=0.08).

• 한국정보통신학회논문지
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• 제12권9호
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• pp.1646-1653
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• 2008

본 논문에서는 전송 채널의 주파수 선택적 특성에 의한 전송 신호의 왜곡현상을 줄이며, 다양한 무선 전송 환경에 대해 일정한 전송 품질을 유지시키는 동시에 최대 데이터 전송률을 제공할 수 있는 다중 반송파 CDMA을 제안한다. 이 시스템은 채널 상태에 따라 작은 지연과 페이딩을 겪는 채널에서는 높은 데이터 전송률로 전송하고, 반면 빠른 페이딩과 긴 지연 성분을 갖는 채널에서는 낮은 전송률로 데이터를 전송한다. 두 경우 모두 다 송신기 구조에서 데이터 직병렬 변환 개수와 데이터 복사 개수를 조절함으로써 가능하다. 여기서, 제안한 시스템은 고정된 수의 부반송파를 갖는다. 따라서 위에서 언급한 직병렬 변화 개수와 데이터 복사 개수의 곱은 항상 일정하게 유지되므로 하드웨어의 변형 없이 구현될 수 있다. 제안한 시스템에서는 직병렬 변환 후 동일 데이터가 여러 다른 부반송파에 복사되어 전송되므로 주파수 다이버시티 이득을 얻을 수 있으며, 레이크(RAKE) 수신구조는 경로 다이버시티 이득도 얻을 수 있게 한다.

• 한국정보통신학회논문지
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• 제11권3호
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• pp.592-599
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• 2007

무선 기술의 발달은 모바일 기능과의 결합으로 전자적인 학습을 향상시키고, 모바일 학습으로 확산되고 있다. 기본적으로 모바일 학습은 학습자에게 교육 내용 접근을 위한 시간과 공간적인 유용성을 제공한다. 그러나 모바일 디바이스는 작은 디스플레이 장치와 제한된 메모리 공간으로 인해서 학습 내용으로의 접근을 단지 텍스트 기반의 전달로 제한하고 있다. 본 논문은 멀티미디어 오브젝트 동기화를 지원하는 SMIL을 사용하여 모바일 디바이스에서 멀티미디어 컨텐츠 제작에 필요한 태그로만 구성한 MSMIL을 정의하여 파서의 크기를 줄이고, 학습 내용 생성시 매크로 방식을 사용하여 멀티미디어 학습 내용의 데이터 감소, 전송 효율 증대를 위한 멀티미디어 모바일 학습 시스템을 설계 및 구현하였다. 구현 결과, 제작 언어의 간소화와 언어 습득의 용이, 그리고 파서의 크기를 줄임으로써 파싱을 위한 CPU의 자원을 절약할 수 있다.

• Annals of Rehabilitation Medicine
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• 제39권6호
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• pp.897-904
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• 2015

Objective To investigate differences in plantar pressure distribution between a normal gait and unpredictable slip events to predict the initiation of the slipping process. Methods Eleven male participants were enrolled. Subjects walked onto a wooden tile, and two layers of oily vinyl sheet were placed on the expected spot of the 4th step to induce a slip. An insole pressure-measuring system was used to monitor plantar pressure distribution. This system measured plantar pressure in four regions (the toes, metatarsal head, arch, and heel) for three events: the step during normal gait; the recovered step, when the subject recovered from a slip; and the uncorrected, harmful slipped step. Four variables were analyzed: peak pressure (PP), contact time (CT), the pressure-time integral (PTI), and the instant of peak pressure (IPP). Results The plantar pressure pattern in the heel was unique, as compared with other parts of the sole. In the heel, PP, CT, and PTI values were high in slipped and recovered steps compared with normal steps. The IPP differed markedly among the three steps. The IPPs in the heel for the three events were, in descending order (from latest to earliest), slipped, recovered, and normal steps, whereas in the other regions the order was normal, recovered, and slipped steps. Finally, the metatarsal head-to-heel IPP ratios for the normal, recovered, and slipped steps were $6.1{\pm}2.9$, $3.1{\pm}3.0$, and $2.2{\pm}2.5$, respectively. Conclusion A distinctive plantar pressure pattern in the heel might be useful for early detection of a slip event to prevent slip-related injuries.

• 산업경영시스템학회지
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• 제24권65호
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• pp.51-63
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• 2001

The present experiment investigated the possibility of evaluating of the human sensibility contingent on the speed and modes of driving using the responses from the autonomic nervous system, subjective assessments, Simulator Sickness (55) in dynamic simulator. The three conditions of the speed of driving were 40 $\pm$ 10 km/h, 100$\pm$10 km/h, 160 $\pm$ 10 km/h, and the participant was instructed to drive the car for three minutes on the elliptical track. It is programed in such a way that the modes of driving can be changed smoothly using road DB in Dynamic Simulator, and for signifying the change of the condition the road signs were used. The instruction was given to the participant to drive the car on the fixed speed of 20 km/h for 30 seconds, then to drive the car on sudden-start mode of driving from the 20 km/h to 160 km/h within 10 seconds. For the sudden-stop mode of driving, it was instructed that stop the car from the speed of 160km/h to 20km/h within 10 seconds when the subject see the road sign, then drive the car at the fixed speed of 20 km/h for 30 seconds. The results of the subjcetive assessment showed that the level of pleasantness and the tension was increased, and physiological response showed that the level of activity of the autonomic responses were also increased as the speed of the car increased. Also, for results on the driving modes showed that the level of pleasantness was highest for the sudden-stop, next highest was sudden-start, and the lowest was 20 km/h fixed speed condition for the subjective assessment, and tile order of the level of activation of the autonomic nervous system showed the same results as above. From the results of the present study it was concluded that the presentation and evaluation of the stimulus for the human sensitivity is possible in dynamic simulator.

• 한국가정과학회지
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• 제8권4호
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• pp.23-35
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• 2005

The purpose of this study was to analyze the chemical components of Perilla leaf(frutescens Britton var. scuta Kudo) according to the making process, and to examine Hunter's color value and sensory evaluation of Jasosuksu by extraction time. Perilla leaves were prepared in three types; fresh leaf, dried leaf in the shade and roasted leaf after being dried in the shade in order to make Jasosuksu. The results of the research were as follows: Free sugars(sucrose, glucose, fructose) and organic acids(citric acid, tartaric acid, malic acid, succinic acid) were present in the fresh leaf, dried leaf and roasted leaf. $15{\sim}16$ kinds of amino acid including aspartic acid were determined in the fresh leaf, dried leaf and roasted leaf, and the major free amino acids were serine, aspartic acid, and glutamic acid. The major total amino acids of tile fresh leaf, dried leaf and roasted leaf were glutamic acid, histinine, and glycine. The major fatty acids of Perilla leaves were palmitic acid, linolenic acid, and linolenic acid. The content ratio of linolenic acid in fresh leaves was the highest, but that of palmitic acid was lower than that of dried leaves and roasted leaves. L value, a value, and b value of Perilla leaf were the highest in the roasted leaves followed by the order of dried leaves and fresh leaves. L value and b value of Jasosuksu extracted from roasted leaves were higher than Jasosuksu extracted from dried leaves. The preference of color, flavor, sweetness of Jasosuksu extracted from dried leaves was the highest when extraction time was 10 min. at $70^{\circ}C$, but that of Jasosuksu extracted from roasted leaves was the highest when extraction time was 15 min. at $70^{\circ}C$. The preference of color, flavor, taste of Jasosuksu extracted from roasted leaves was higher than that of Jasosuksu extracted from dried leaves.

• 태양에너지
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• 제15권2호
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• pp.91-99
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• 1995

분무열분해법으로 $SnO_2$ 박막을 증착하여 반응변수들이 증착에 미치는 영향을 연구하였다. 분무용액의 농도가 0.01M인 경우 증착온도가 낮을 때에는 증착과정이 표면반응의 지배를 받으며 증착온도가 증가함에 따라 $400^{\circ}C$까지는 물질전달의 지배율이 증가한다. $400^{\circ}C$ 이상에서는 분무압력이 낮을 때는 물질전달의 지배율이 증가한다. $400^{\circ}C$ 이상에서는 분무압력이 낮을 때는 물질전달에 의해, 분무압력이 높을 때는 표면반응에 의해 지배를 받는다. 분무용액의 농도가 증가함에 따라 증착속도는 증가하였으며 본 실험의 경우 Rideal-Eley 기구에 의해 증착반응이 일어났다. 기판의 온도가 증가함에 따라 증착속도는 증가하다가 $400^{\circ}C$ 이상에서는 균일한 핵생성에 의하여 증착속도는 감소하였다. 분무지속 시간에 비례하여 증착층의 두께는 증가하였으며 기판과 증착층간에는 물리적인 접착을 이루고 있다.

• 한국컴퓨터게임학회논문지
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• 제31권4호
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• pp.137-144
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• 2018

과거 모자이크 기법은 바닥에 천을 깔고 타일을 수작업으로 붙여 제작하였다. 하지만 최근 기술의 발달로 데이터 저장 방식이 아날로그에서 디지털로 발전하여 컴퓨터를 통한 이미지 표현과 변환이 가능해지며 모자이크의 표현 기법 또한 다양하게 발전하고, 디지털로의 예술표현 방식으로도 사용되어지며 공학 분야에서도 그 제작 과정에 대한 연구들이 다양하다. 본 논문에서 제안하는 기법은 나선형으로 실시간 퍼져나가는 결정화(Crystallization)모자이크로 타일요소는 3D석영(Crystal)을 사용한다. 기존 연구들은 대체로 이미지를 좀 더 세밀하게 묘사하기 위함이 연구 목적의 주를 이루고 있지만 본 기법은 시도되지 않았던 나선 드로잉과 결정화를 접목하고 3D 공간에서의 새로운 모자이크 방식을 시도 한다. 또한 제안하는 기법의 대한 검증과 이를 기반으로 게임으로의 발전방향에 대해 모색한다. 본 기법을 바탕으로 제작된 작품 'Spiral Crystallization Photo' 는 MWU Award'18에서 Top27에 선정되었으며 Unite Seoul 2018에서 전시 되었다.

• 한국컴퓨터게임학회논문지
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• 제31권4호
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• pp.167-174
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• 2018

동형건반배치는 타일 형태의 건반 악기에서 음의 배치를 일관되게 하는 방법으로 같은 방향의 이웃 건반에 같은 음정차이로 배치함으로써 일관된 음계배치가 가능하도록 하는 방법이다. 비교적 오래전부터 사용되어 왔지만 최근에 다양한 현대적인 악기 설계나 소프트웨어적인 악기의 인터페이스에서 적용함으로써 주목받아오는 방법이다. 여기에는 서로 다른 다양한 배치 방법들이 제안되어 왔으나 몇 가지가 존재하는 지 서로 어떤 관계에 있는 지 등에 대한 연구가 거의 이루어져 있지 않다. 본 논문에서는 이러한 동형건반배치에 대해 분류 방법을 제시하고 이들 간의 관계에 대해서 분석한다. 이는 기존에 알려져 있는 것보다 훨씬 적은 수의 동형건반배치 종류가 존재함을 보이고 분류의 틀을 마련하여 동형건반배치에 대한 연구의 기반을 제시하였다. 이를 바탕으로 좀 더 체계적인 분석과 연구가 이루어 질 것으로 기대되며 다양한 음악용 인터페이스를 개발하는 데 활용할 수 있을 것으로 기대한다. 이러한 연구는 음악 교육용 게임에서 기본적인 요소인 음정, 화성, 화음, 음계 등을 이해하도록 트레이닝 시키는 데 매우 중요한 역할을 할 것으로 보인다.