• 아동학회지
• /
• 제33권5호
• /
• pp.139-161
• /
• 2012

The purpose of this study was to analyze the relationships of mothers' parenting stress and young children's adjustment to the child care centers they attend. The subjects for this study comprised 401 young children from 1 to 4 years of age from 11 child care centers in C-si, Chungnam, and their mothers. The results of this study were as follows : First, there were no significant differences in the parenting stress of mothers related to whether they were working or not, the age of the children nor their gender Second, there were no significant differences in the adjustment of young children to their child care center related to their mothers' work status nor age of the children themselves. However, there was a significant difference in relation to the gender of the young children in that girls were better in their adjustment to the child care center than boys. Third, a negative correlation appeared between mothers' parenting stress and their young children's adjustment to the child care center in that the higher maternal parenting stress was, the greater the difficulties for their young children in their adjustment to the child care center. There were significant negatively correlations between most sub-factors of maternal parenting stress and the adjustment of those children to the child care center.

• 한국멀티미디어학회논문지
• /
• 제20권2호
• /
• pp.420-428
• /
• 2017

In recent trends, the first age of digital device usage has been significantly getting low and the using frequencies for younger generation have been gradually increasing. Also, while there were more negative opinions of this trend in the past, the new idea is changing to more needs of training and approaches for children's sound using guidelines for digital device. In fact, people believe the new generation will face more advanced future, called the Fourth Industrial Revolution. The purpose of the paper is first to explain about the Jacques Lacan's concept of desire theory in order to understand the human's unconscious level through His desire theory. Second, the paper identifies how this unconscious level is affected to ethical aspects of new generations whose unconscious level are frequently and early exposed to digital media. Lastly, the paper will present the necessity of digital literacy education as well as future direction. Furthermore, the paper review for what is the ethics and positive guidelines of digital media for children who will become the future citizens in the era of the Fourth Industrial Revolution.

• Journal of Biosystems Engineering
• /
• 제19권4호
• /
• pp.318-328
• /
• 1994

This study was carried out to find out the possibility of continuity of the Farming Service Company (FSC), which has been founding since 1991 by the public administration to obtain the scale economy in the rice production, through the only financial analysis of the FSC. The results obtained were as follows. 1. The FSC's business is forward to the off-farm business rather than farm business. Based on the profit ratio, the profit ratio of off-farm business is more than that of farm business. It may cause the difficulty of policy to obtain the scale economy in the farming through the FSC. 2. Without subsidies the average net profit of the FSC was negative, which may provide the motives to the FSC to seek out the way to survive through the off-farm business, unless the FSC's could break up. 3. After all, the possibility of continuity of the FSC through the only financial analysis seems to be very little. Therefore the public administration should reconsider the present policy which is to found the more FSC continuously. If government wants to support the FSC continuously, government should focus on the conglomeration of farm land to increase the productivity of farming and on the subsidy of off-farm business to increase the profit ratio of the FSC.

• Fisheries and Aquatic Sciences
• /
• 제12권1호
• /
• pp.24-28
• /
• 2009

A tetracycline resistant Vibrio parahaemolyticus, capable of growing on TCBS medium containing tetracycline, was isolated from cultivated fishes. A gene responsible for the tetracycline resistance was cloned from chromosomal DNA of the V. parahaemolyticus strain using Escherichia coli KAM3, which lacks major multi-drug efflux pumps (${\Delta}acrB$) as host cells. The nucleotide sequence and homology analysis revealed an open reading frame (ORF) for tetracycline resistance protein (TetB). In order to characterize the antibiotic resistance of TetB originated from the V. parahaemolyticus strain, the gene was sub cloned into plasmid pSTV28. The resulting plasmid was designated as pSTVTetB and transformated into E. coli KAM3. E. coli KAM3 cells harboring the recombinant plasmid pSTVTetB are able to grow on plates containing tetracycline and oxytetracycline but not doxycycline, indicating that the tetB gene confers the tetracycline- and oxytetracycline-resistance to the host cell.

• 치위생과학회지
• /
• 제13권3호
• /
• pp.354-357
• /
• 2013

심상성 사마귀는 피부에서 매우 흔하게 관찰되는 병소중하나이다. 보통 심상성 사마귀는 인간 유두종 바이러스 중저위험군에 의해서 발생된다. 심상성 사마귀는 구강 점막에서 거의 나타나지 않지만 편평유두종으로 오진될 수 있다. 그러므로 저자들은 구강에서 발생한 심상성 사마귀 8예를 임상 병리학적 특징을 관찰하여 보고하였다.

• 한국통신학회논문지
• /
• 제35권4C호
• /
• pp.321-328
• /
• 2010

본 논문에서는 이동 통신에서 주로 쓰이는 하향/상향링크(downlink/uplink)처럼 상호 간의 상관관계가 존재하는 두 개의 채널에 대한 시뮬레이션 방법을 제안한다. 제안된 방법은 기존 방법의 문제점인 채널 간의 상관관계가 수학적 기준모델과 일치하지 않는 점을 개선한 방법이다. 레일리 페이딩 채널 시뮬레이션 모델은 유한개의 삼각함수의 합을 이용한 SOS(Sum-of-Sinusoids) 방법을 사용하였다. 이 방법은 페이딩 신호의 샘플들을 발생할 때 효율적인 방법으로 알려져 있으며 수학적 기준모델에 대한 정확한 시뮬레이션 결과를 얻을 수 있다. 제안된 모델은 기준모델의 이론적인 상관관계와 시뮬레이터로부터 얻은 채널 간의 상관관계의 오차를 줄이기 위해 MSE를 최소화하는 방식을 이용하면서 평균전력을 이론치와 같게 유지하는 방법이다. 실험결과를 통해 제안한 방법이 기존의 방법보다 기준모델의 수학적 상관관계를 더욱 정확히 모사하는 것을 확인하였다.

• Current Research on Agriculture and Life Sciences
• /
• 제13권
• /
• pp.55-64
• /
• 1995

Apple is most favorable fruit in Korea, and apple farmland has been increased before and after the agreements of Uruguay Round and apple is considered as one of strategic agricultural goods. Especially expansion of apple farmland is concentrated in Kyungpook region because of the suitable climate and its market share is about 70 percents in 1992. But in tree age of apple, although newly and replanting area is increasing, the rate of old orchards is higher than that of other regions. In varieties of apple, it is concentrated in Fuji and is forecasted to increase in the future. The amount of apple production of Kyungpook region is 480 thousand tons, that is concentrated in Wui-sung, Young-ju and An-dong. The quantity of apple production per 10a. is 1,315kg, that is low level compared with that of America and Japan, and the gap of technology among farmers is heavily. The difficulties of apple farming in Kyungpook region are summarized as follows. first, the lack of mechanization and facilities due to the small scale of farmland, second, lack of rural labor force, third, concentration on Fuji apple varieties, fourth, low productivity of apple farming.

• 한국게임학회 논문지
• /
• 제19권3호
• /
• pp.53-64
• /
• 2019

본 연구는 VR 게임의 지속가능한 발전을 위해 VR 게임의 어떤 요소가 사용자에게 만족감 및 지속적인 사용을 이끌어내는 요인들을 확인하는 것을 목표로 하고 있다. 구체적으로 VR 게임의 수용 및 지속적 이용의도를 예측하기 위해 지각된 비용, 프레즌스, 만족 변수가 추가된 확장된 기술수용 모델의 제안을 시도하였다. 분석 결과, 세 가지 요인이 추가된 확장된 기술수용모델이 기존 모델보다 대체적으로 VR 게임의 특성 및 이용자들에게 미치는 영향을 설명하는데 유리한 것으로 파악되었다. 본 연구는 VR게임의 핵심적인 특성을 고려한 연구 모형을 제안하였고 어떤 요소가 지속적 이용의도를 이끌어내는가를 살펴봄으로써 이용자 관점 VR게임 연구에 기여하고자 한다.

• 한국물환경학회지
• /
• 제27권2호
• /
• pp.210-217
• /
• 2011

In results of accomplishing fundamental study to improve the flocculant-mixing of the Flash-Mixer in Onsan Water-Treatment Plant at the small cost, We obtained 8.9% of mixing-efficiency from the field data and 3.2% of the characteristic flow-ratio as the available maximum volume-ratio in this Water-Treatment Plant. The optimum elements with the deflector diameter of 400 mm and deflector angle of $145^{\circ}$ at the flow ratio of 3.2% could be obtained from the expanded study on the ground of the fundamental study. Finally, the efficiency could be improved about 510% from 8.9% to 45.4% and the average turbidity could be improved about 14%.

• Archives of Plastic Surgery
• /
• 제48권3호
• /
• pp.338-343
• /
• 2021

Purpura fulminans is a serious condition that can result in severe morbidity in the pediatric population. Although autologous skin grafts remain the gold standard for the coverage of partial- to full-thickness wounds, they have several limitations in pediatric patients, including the lack of planar donor sites, the risk of hemodynamic instability, and the limited graft thickness. In Singapore, an in-house skin culture laboratory has been available since 2005 for the use of cultured epithelial autografts (CEAs), especially in burn wounds. However, due to the fragility of CEAs, negative-pressure wound therapy (NPWT) dressings have been rarely used with CEAs. With several modifications, we report a successful case of NPWT applied over a CEA in an infant who sustained 30% total body surface area full-thickness wounds over the anterior abdomen, flank, and upper thigh secondary to purpura fulminans. We also describe the advantages of using NPWT dressing over a CEA, particularly in pediatric patients.