• KOREAN POULTRY JOURNAL
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• 제38권10호통권444호
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• pp.76-77
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• 2006

• The Korea Swine Journal
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• 제11권3호통권115호
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• pp.136-140
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• 1989

• The Korea Swine Journal
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• 제11권4호통권116호
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• pp.126-129
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• 1989

비유생리에 가장 큰 영향을 미치는 것은 호르몬이다. 임신말기에는 태반에서 분비되는 에스트로젠과 프로제스테론이라는 호르몬의 작용을 받아서 태아가 자궁에 착상되어 임신이 유지되는데, 분만과 함께 이들 분비는 억제되고 프로락틴 (Prplactin) 이 이라는 호르몬이 뇌하수체전엽으로부터 분비되기 시작한다.

• 한국IT서비스학회:학술대회논문집
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• 한국IT서비스학회 2005년도 추계학술대회
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• pp.76-84
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• 2005

IT 아웃소싱은 IT의 비용 절감 및 핵심 역량 강화의 경영혁신 방법으로써 많은 국내외 기업에서 활발히 추진되고 있다. 그러나 국내 IT 아웃소싱은 산업별 또는 업종별로 제각기 다른 활성화 수준을 보여주고 있으며, 특히 은행업인 경우 선진국에 비해 IT 아웃소싱의 활용이 활발하지 못한 실정이다. 본 연구의 목적은 이와 같은 국내 은행의 IT 아웃소성이 해외 은행에 비해 비활성화 되어 있는 원인을 파악하고자 한다. 이러한 연구목적 달성을 위하여 본 연구에서는 거래비용이론과 계약이론을 고찰하여 국내 은행의 IT 아웃소싱이 비활성화 되어 있는 요인들을 도출하고 국내 및 해외 은행의 사례분석을 통하여 비교하였다. 본 연구를 통해 국내 은행 산업 군의 IT 아웃소싱 비활성화 원인을 심층적으로 살펴 봄과 동시에 국내 은행의 IT 아웃소싱을 활성화 할 수 있는 방안을 제시하고자 한다.

• Ecology and Resilient Infrastructure
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• 제4권3호
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• pp.130-141
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• 2017

We evaluated the field application feasibility that biologically derived substances (Naphthoquinone derivate: NQ 2-0) can be used for the eco-friendly mitigation of natural harmful cyanobacterial blooms in freshwater. We conducted a 30 ton scale mesocosm experiment to investigate the effects of NQ 2-0 on biotic and abiotic factors in water collected from Gi-heung reservoir. In the mesocosm experiments, the abundance of Microcystis sp. was continuously increased in the control. However, the Microcystis sp. cell density was sharply decreased on the $10^{th}$ day. In the treatment, NQ 2-0 showed the strong and selective algicidal activity toward the target cyanobacteria (Microcystis sp.). Accordingly, the algicidal activity of NQ 2-0 compound increased gradually until $10^{th}$, $15^{th}$ days and algal biomass was decreased to 99.4 and 100 %, respectively. NQ 2-0 compound was not only selective algicidal activity but also the growth of other phytoplankton and increased the Shannon-Wiener diversity index of phytoplankton. In the mesocosm experiments, the dynamics of biotic (bacteria, heterotrophic nanoflagellate, ciliates, zooplankton) and abiotic (water temperature, dissolved oxygen, pH, conductivity, nutrients) factors remained unaffected. These results suggest that NQ 2-0 could be a selective and ecologically safe algicide to mitigate harmful cyanobacterial blooms. In addition, it is believed that NQ 2-0 will play a major role in forming a healthy aquatic ecosystem by facilitating habitat and food supply of aquatic organisms.

• Journal of Chest Surgery
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• 제29권7호
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• pp.728-733
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• 1996

Since thoracoscopy was originally described by Jacobaeus in 1922, video-assisted thoracic surgery has been used to treat many thoracic diseases. From June 1994 to July 1995, 35 patients with spontaneous pneumothorax'underwent video-assisted thoracic sugery as experimental group, and same number of patien:s with blob resection through mid-axillary thoracotomy as co trol group in our hospital.'The authors compared the clinical results between each group. 1. The sex distributions were 28 males, 7 females in experimental group and 30 males, 5 females in control group. The mean age of experimental group was 28.5 $\pm$ 12.6 years of age and that of control group was 2).9 $\pm$ 6.3 years of age. 2. The operative times were 98.8$\pm$ )9.3 minutes in experimental group and 103.6$\pm$ )2.6 minutes in control group. ). The duration of chest tube indwelling at postoperative period was 2.60 $\pm$ 0.98 days in experimental group, 4.80 $\pm$ 2.08 days in control group (P< 0.01). The periods of postoperative hospitalization were 17 $\pm$ 1.22 days in experimental group and 6.69 $\pm$2.52 days in control group. The durations of post-oper- ative chest tube indwelling and hospital stay in experimental group were shorter than in control group (P< 0.01 respectively). 4. The injection of analgesics at postoperative period was less in experimental group than control group. At the operative day and postoperative 1 st and 2nd day, the number of injections were respectively 1. 57$\pm$0.74, 1.97 $\pm$0.70 and 1.00$\pm$0.68 times/person in experimental group, 2.23 $\pm$0.60, 2.60 $\pm$0.67 and 2. 17$\pm$0.76 times/person in control group(P<0.01 respectively). The mean duration and dose of postoperative analgesic injection were 2.48$\pm$ 1.01 days/person and 4.88 $\pm$3.70 ampules/person in experimetal group, 3.70$\pm$ 1.40 days/person and 8.94 $\pm$4.21 ampules/person respectively (P< 0.01, p<0. 01).

• Journal of the Korean Society of Environmental Restoration Technology
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• 제17권2호
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• pp.61-71
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• 2014

A river fishway is a hydraulic structure enabling fish to overcome stream obstructions such as dams and weirs. The main aim of this paper is to investigate the collectibility of upstream-migrating fishes and hydraulic problems in pool-and-weir type fishway which has been established for upstream-migration at Namgang weir in the downstream of Namgang dam, and to grope for improvement measures which pool-and-weir type fishway can be switched to pool-and-partial weir type fishway through hydraulic field experiment. Exsisting fishway had problems which upstream-migrating fishes can not take a rest due to the seiche and vortex phenomena in pools and migrate to upstream because of height difference in entrance pool. In order to prevent hydraulically the seiche and vortex phenomena and establish rest area for fishes in each pool, we carried out hydraulic field experiments. In the fishway, it was to improve pool-and-weir into pool-and-partil weir, to decrease the height difference in entrance pool, and to reduce oriffice velocity of each pool. Also, we investigated fishes collectibility of after improving fishway for 6 days in September 2013. To resolve chronic problems(seiche-vortex phenomena and rest area for fishes), as weirs were remodeled into partial weir only which central part of weirs was part of non-overflow weir, we confirmed results that pool-and-weir type fishway could be switched to efficient pool-and-partial weir type fishway with relatively simple construction and low cost. Type-B which has the closed oriffices and the parts of non-overflow has the ideal conditions, but this conditions are limited to fishway of Namgang weir used in this study. Representative Ice-habor type fishway is pool-and-partial weir type fishway which has together parts of overflow and oriffices, and has excellent ability of upstream-migration. To switch from pool-and-weir type fishway to pool-and-partial weir type fishway, the size of oriffice has to be regulated by the discharge of fishway and the dimension on parts of non-overflow and overflow in weirs. Entrance pool is important facility which upstream-migrating fishes have to not only be collect but also charge with energy. In this study, entrance-pool is temporary and roughly-built, but fishes gather together more than the case of no entrance-pool. In the case of fishway which was protruded to downstream, as entrance of fishway turns toward or parallels to weir, the collectibility of fishway was excellent by attraction water.

• Journal of Korea Water Resources Association
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• 제49권2호
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• pp.83-94
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• 2016

Geomorphological, bed material and hydraulic characteristics are basis informations for the planning, design and management of the river in the aspect of flood control and environmental conservation, and it is very important to use these informations for the design of stable channel. In this study, dominant discharge was selected, geomorphological and hydraulic characteristics were analyzed using that discharge and also the characteristics of bed materials distribution were analyzed and bed materials-flow resistance relationship was evaluated, for the upstream section of Namgang dam. The dominant discharge was estimated a return period of approximately 1.5 year and stream type were classified Segment 1 and Segment 2 in this stream. Also, the frequency of riffle-pool showed 4.4 because this study area has the characteristics of natural channel that have not channel-crossing structures. In dominant discharge, according to the results that analyzed relationship between $h/d_{50}$ and $V/u_*$ to calculate flow resistance by bed materials, Julian's formula showed to appropriate in channel where is relatively close to natural river and is predominantly consisted of gravel, cobble, boulder and rock in mountain, and it was confirmed that the image processing methodology will be easily applied to the analysis of bed materials distribution in future.

• Journal of Korean Society of Forest Science
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• 제101권1호
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• pp.113-120
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• 2012

The purpose of this study was to find out the effect of a torrent control structure using customized tetrapods on the forest water quality, fishes, snials and streamwater ecology conservation and management. The study was conducted in the Honggye valley located in Sanchung-gun, Gyungsangnam-do, and stream water quality and streamwater ecology was compared before and during 2 years after construction of torrent control structure. After construction of the torrent control structure using customized tetrapods, pH of stream water didn't get out of the range of River water quality standard class I. After 2 years construction of the torrent control structure using customized tetrapods, Dissolved Oxygen concentration didn't change, and Electrical Conductivity measurements agreed well within the range of normal clean stream water quality. After construction of the torrent control structure using customized tetrapods, fishes and snials up and down stream movement didn't influence of the tetrapods dam. Stream water quality during 2 years after construction of the torrent control structure was similar to before construction. Therefore, it was find out that the torrent control structure didn't affect stream water quality and ecology.

• Journal of Korean Society of Forest Science
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• 제100권1호
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• pp.105-111
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• 2011

The purpose of this study was to find out the effect of a torrent control structure using customized tetrapods on the forest water quality conservation and management. The study was conducted in the Honggye valley located in Sanchung-gun, Gyungsangnam-do, and stream water quality was compared before and after construction of torrent control structure. After construction of the torrent control structure using customized tetrapods, pH of stream water didn't get out of the range of River water quality standard class I. After construction of the torrent control structure using customized tetrapods, Dissolved Oxygen concentration didn't change, and Electrical Conductivity measurements agreed well within the range of normal clean stream water quality. After construction of the torrent control structure using customized tetrapods, average of total amount of anion was 3.07/2.30~3.60 mg/L, being slightly greater than before construction. Stream water quality after construction of the torrent control structure was similar to before construction. Therefore, it was find out that the torrent control structure didn't affect stream water quality.