• Journal of Nutrition and Health
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• 제37권5호
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• pp.347-351
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• 2004

This study was carried out to investigate the supplementary effects of ${\gamma}$-oryzanol extracted from rice bran on lipid metabolism in diabetic mice. We supplied 2 kinds of experimental diets (CO without and GO with 0.2％ ${\gamma}$-oryzanol) to diabetic mice for 8 weeks. Diet intake, body weight, organ weight, contents of serum and hepatic lipid profiles, and fecal lipid levels were measured. Though there was no significant difference in diet intake, body weight change and organ weight between experimental groups, the concentration of serum total cholesterol and hepatic total lipid, total cholesterol and HMG-CoA reductase activity was significantly lower in GO group treated with 0.2％ ${\gamma}$-oryzanol of diet than CO group after supplementary period of experimental diets. And total lipid, triglyceride, total cholesterol, and bile acid levels excreted to feces were significantly higher in GO group than CO group. These results suggest that ${\gamma}$-oryzanol decrease the serum and hepatic lipid levels by lowing HMG-CoA reductase activity or increasing the contents of fecal lipid in diabetic KK mice.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2014년도 전력전자학술대회 논문집
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• pp.383-384
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• 2014

This paper investigates the experimental and simulated time-varying magnetic field generation in a chlor-alkali manufacturing process. 19kA thyristor-based rectifier is modeled and analyzed. The performance is compared and evaluated on the basis of exposure guidelines from ICNIRP. The mechanical structure of current carrying conductor is simplified as an infinite long busbar model and low frequency harmonic contents up to 65kHz are considered. Thyristor rectifier generates a significant amount of low frequency magnetic field harmonic contents both at ac and dc busbar of rectifier infringing the limit of ICNIRP. Along with simulation analysis the experimental measurement of the time-varying magnetic field in ac input busbar, rectifier block, dc load and busbar are presented. The experimental test results partly confirm the simulation results.

• 아동학회지
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• 제27권1호
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• pp.139-151
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• 2006

This study was conducted to examine the effects of mathematical activities with online mathematical contents on children's arithmetic development and attitudes toward mathematical activities. Pre- and post-tests were administered to 62 5-year-old children. Differences of children's arithmetic development level and attitudes toward mathematical activities were found between the experimental group using online mathematical contents and the control group using offline mathematical contents. All findings proved that online mathematical contents were effective and had positive influences on children's arithmetic development and attitudes toward mathematical activities. This supports the proposition that online mathematical contents can provide an important means to the improvement of children's mathematical development and attitudes toward mathematical activities.

• 아동학회지
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• 제20권2호
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• pp.187-204
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• 1999

The 20 five-year-old kindergarteners in the experimental group participated in 14 art criticism activities over an 8 week period. Analysis of the data by frequency, percentage, and t-test showed differences between the experimental and control groups. The experimental group improved in Visual Cue-Attendance and Evaluative Judgmental categories. Children in the experimental group also showed higher scores in organization of pictures and materials in their expressive art work. There were no differences between groups in sequence and contents of expression.

• Restorative Dentistry and Endodontics
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• 제25권3호
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• pp.421-434
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• 2000

The purpose of this study was to evaluate the influences of incorporation of zirconium-silicate on diametral tensile strength, shear bond strength to the enamel, and depth of cure of 7 experimental composites. One group contained no filler(group 1 or control group), and the other 6 composites contain 75% filler in which zirconium-silicate(Zr-Si) were 0%, 2%, 4%, 6%, 8%, 10% with reduced contents of silica filler, respectively. Both of fillers were treated with 1% silane (${\gamma}$-methacryloxypropyltrimethoxy silane). Light curable monomers were prepared by mixing Bis-GMA and TEGDMA with 3:1 ratio and adding camphoroquinone(CQ) 0.6% with tertiary amine 0.3%. Diametral tensile strengths of specimens with $3mm{\times}6mm$ were measured with Instron (No.4467, USA) with 1mm/min crosshead speed. Shear bond strengths of composites which bonded to bovine enamel etched with 37% phosphoric acid were measured at Instron Testing Machine with as same speed as in diametral tensile strengths. Depth of cure were measured by a method that composite was filled in cylinder mold, illuminated at one side. and uncured composite was removed with acetone, and the residual thickness of composite was measured. Following results were obtained ; 1. Composites containing 0%, 2%, or 4% zirconium-silicate filler(group 2, 3 and 4) showed the statistically higher diametral tensile strength than the others. (p<0.05) 2. Increase of zirconium-silicate filler contents reduced the diametral tensile strength of experimental composites. ($r^2$=0.8721, p=0.0002) 3. Increase of zirconium-silicate filler contents did not affect the shear bond strength of experimental composites. ($r^2$=0.2815, p=0.4067) 4. Increase of zirconium-silicate filler contents reduced significantly the depth of cure of experimental composites. ($r^2$=0.9700, p<0.0001) These results mean that the mechanical properties of composites could not be improved by incorporation of small amount of zirconium-silicate filler. Also, the increased contents of zirconium-silicates fillers was found to reduce the diametral tensile strength and depth of cure.

• 한국콘텐츠학회논문지
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• 제14권1호
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• pp.56-65
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• 2014

실험영화작가들은 필연적으로 영화가 가진 물리적인 속성과 한계 그리고 영화만의 단독적인 요소들을 자신들의 영화창작의 핵심으로 간주하였다. 관습적인 영화 규범을 거부하는 태도는 영화의 작동원리에 대한 새로운 관심을 통해서도 강화되었다. 실험영화작가들은 영화의 메커니즘이 어떤 방식으로 영화의 최종 결과물에 영향을 주는지에 대해 질문하였다. 실험영화에서는 극영화의 내러티브에 상응하는 '특정한 전개 구조' 필요하고 이를 위해서 현재의 시점에서 이미지의 흐름에 주목하였다. 움직임의 환영을 만들어 내는 이미지의 연쇄 개념은 다양한 영화적 실험을 가능하게 하였다. 특히, 미국의 구조영화작가들은 이미지들이 연속적으로 움직이는 방식을 변형시킴으로써 관습적인 극영화와는 다른 영화의 의미와 정서를 전달하는 방법들을 모색하였다. 이를 통해서 관습적인 내러티브의 성격과 기능에 대해 문제를 제기하고 새로운 영화전개방식에 대해 탐구하였다. 이러한 구조영화의 전통은 실험영화를 이해하는 핵심적인 개념이며 디지털 영화제작 환경으로 변모하고 있는 오늘날에도 여전히 유용한 접근방식이다.

• 한국콘텐츠학회논문지
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• 제19권4호
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• pp.458-465
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• 2019

실험애니메이션은 실험정신 그 자체로 독립 예술애니메이션이자 작가주의적 실험정신으로 집약된 영상예술이다. 특히 노먼 맥라렌은 뛰어난 창의력과 감성으로 시각적 표현 기술에 대한 과학적 탐구와 상식을 초월한 실험을 통해 작품마다 독창적인 조형미를 추구하며 오늘날 영상매체의 혁신을 불러온 실험애니메이션의 거장으로써 애니메이션 작품의 미학적 가치는 매우 높다. 그러므로 다양한 기법의 도전으로 실험애니메이션의 영역을 확장하고 각 프레임 사이에서 일어나는 움직임 창조에 관한 끊임없는 탐구를 수행했던 노먼 맥라렌의 실험적 표현 방식을 분석하고 그가 집중한 움직임의 표현을 연구하는 것은 의미가 있다. 그 결과 그의 움직임 표현의 가장 큰 특징은 운동성의 반복과 변형의 반복으로 분석되었으며 이러한 도출이 실험 방식에 대한 단순 의문보다는 보다 구체적인 형태의 탐구가 요구되는 실험 방식의 실험애니메이션으로 이해되길 바란다. 또한 대학교육에서 애니메이션 창작의 가능성과 나아갈 방향을 심층적으로 모색하기 위한 선행 연구로 의미가 있기를 바란다.

• Journal of Nutrition and Health
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• 제30권3호
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• pp.266-276
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• 1997

To investigate the effects of dietary protein and calcium levels on calcium and bone metabolism Sprague-Dawley male growing rats weighting approximately 91.4g were divided into four groups and fed one of the following four experimental diets-15% protein 0.2% calcium ; 15% protein 0.5% calcium ; 30% protein 0.2% calcium ; 30% protein 0.5% calcium-for five weeks. Calcium intake and excretion, apparent calcium absorption were measured and bone densities and mineral contents of femur and scapula were analyzed. Calcium excretion through feces and urine was significantly greater in animals receiving diets of higher calcium. Fecal calcium but not urinary calcium excretion was greater when the protein level was increased from 15% to 30%. Apparent calcium absorption rate was significantly higher with lower calcium intakes. Serum alkaline phosphatase activity was significantly higher in 0.2% calcium group than in 0.5% calcium group, while urinary hydroxyproline excretion was essentially same among all experimental groups. Weights and mineral contents or protein. Bone weights were greater, but calcium and ash contents of femur and scapula were lower in animals on the diet containing low calcium and high protein, which suggests that bone metabolism may be affected by the interaction between calcium and protein intake. These results indicate that during growth high protein intake might be beneficial to bone health if the diet is sufficient in calcium, however, if the diet fails to provide an optimum amount of calcium, such practice might be detrimental.

• 대한한의학회지
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• 제17권1호
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• pp.146-170
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• 1996

This study aimed to evaluate the anti-stress effects of Walgukhwan, Walgukhwan+Ejintang and Wal gukhwan+Samultang. The experimental animals treated with each extracts during 15 days before the immobilization stress. And each experimental animals were endowed with 12 hours immobilization stress. Then the brain, blood and urine catecholamine contents and serum total cholesterol, triglyceride and free fatty acid levels were studied. The result were as followed; 1. Walgukhwan, Walgukhwan+Ejintang and Walgukhwan+Samultang were not statistically effective to the changes of the body weight. 2. Walgukhwan was statistically effective to the increase of the blood norepinephrine content as compared with control. 3. Walgukhwan+Ejintang was statistically effective to the increase of the blood and urine norepinephrine contents as compared with control. 4. Walgukhwan+Samultang was statisticallv effective to the increase of the brain, blood and urine norepinephrine contents and also to the increase of the blood and urine dopamine contents as compared with control. 5. Walgukhwan was statistically effective to the increase of the serum free fatty acid level as compared with control. 6. Walgukhwan+Ejintang was statistically effective to the increase of the serum triglyceride and free fatty acid levels as compared with control. 7. Walgukhwan+Samultang was statistically effective to the increase of the serum total cholesterol, triglyceride and free fatty acid levels as compared with control.

• 한국게임학회 논문지
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• 제13권6호
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• pp.15-26
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• 2013

최근 BCI(Brain Computer Interface) 기술의 발전과 함께 보급형 BCI 장치를 활용한 게임연구가 활발히 진행되고 있다. BCI 게임은 대부분 연구를 위한 실험적인 체험용 콘텐츠 형태로 개발되어 왔으며, 명령 패러다임에 있어서 BCI 게임 명령에 적합한 뇌파를 유도하는 방법에 대한 연구는 미흡하다. 본 연구에서는 음악의 리듬을 시청각적으로 표현하는 새로운 플레이 요소를 제공하는 BCI 리듬게임과 음악의 템포와 뇌파를 동기화 시켜 다양한 형태의 시청각 피드백을 생성하는 방법을 제안한다. 제안방법은 실험을 통해 게임조작에 필요로 하는 뇌파를 유도하여 게임점수를 향상시킬 수 있음을 확인하였다.