• KOREAN JOURNAL OF CROP SCIENCE
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• v.48 no.5
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• pp.381-387
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• 2003

Winter hairy vetch (HV) can be used as green manure with conventional tillage system (CT), in which chemical N fertilizer required for cultivation of sub-sequent com could be fully saved, or as cover crop with no-tillage system (NT) in which soil could be protected from erosion, control of weed, and the reduction of N fertilizer application. This experiment was carried out to compare the enrichment of soil mineral nitrogen (SMN) at corn root zone, and the changes of com growth and N uptake according to HV amounts (winter fallow, above-ground HV removed, intact HV, and HV added from aboveground HV removed) under two tillage systems in the upland field of National Crop Experiment Station, Suwon, Korea in 1996. HV cultivation during winter decreased SMN a little at com planting. HV incorporation with CT increased SMN rapidly during early growth stage according to rapid decomposition of Hv. SMN by HV cover with NT was increased slowly and its increase was higher in the surface soil (soil layer 0-7.5cm) compared to deep soil layer 7.5-22cm. Com growth and N status at corn silking stage, com yield and N uptake at harvest were increased in proportion to aboveground HV amounts regardless of tillage system. Average hairy vetch nitrogen (HV-N) uptake efficiency by com was 10% higher with CT than with NT in which average HV-N uptake efficiency was 43 %. Corn yields were not different between two tillage systems, but corn N uptake was increased by 33 kgN/ha more with CT than with NT due to the increase of corn N concentration. The increase of SMN and com N uptake from HV cover with NT could not be disregarded though those with CT were higher than with NT

• Journal of Life Science
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• v.33 no.11
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• pp.923-935
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• 2023

Rubus crataegifolius (RC), Ulmus macrocarpa (UM), and Gardenia jasminoides (GJ) are well-known folk medicines in Asia used to treat various gastrointestinal disturbances. The present study evaluated the gastroprotective effect of LS-RUG-com, a mixture of commercially prepared powders of RC, UM, and GJ with a ratio of 3:1:2(w/w/w) against HCl/ethanol-induced gastritis, indomethacin-induced ulcers, and esophageal reflux-induced esophageal mucosal damage and Helicobacter pylori infections. In addition, TNF-α and IL-1β expressions were also determined and measured in esophageal tissue. As to HCl/ethanol-induced gastritis, the LS-RUG-com treatment at a dose of 150 mg/kg showed a remarkable anti-gastritis effect. Regarding indomethacin-induced gastric ulcers, the LS-RUG-com treatment had a significant anti-gastric ulcer effect. Furthermore, in the gastroesophageal reflux disease (GERD) model experiment, the LS-RUG-com treatment resulted in the histological recovery of stomach damage and mucosal injuries. Furthermore, the LS-RUG-com treatment led to an increase in gastric content pH, an increase in mucus protection, and a decrease in gastric pepsin output with a significant decrease in TNF-α and IL-1β. As to the Helicobacter pylori infected animal model, LS-RUG-com had a notable inhibitory effect on Helicobacter growth. The use of RC, UM, or GJ in isolation or the LS-RUG-com treatment as whole had good effects in terms of anti-oxidation, anti-neutralization, gastric acid secretion inhibition, and anti-lipid peroxidation, which supported the use of natural products as systemic gastric protective agents. Our results suggest that the LS-RUG-com might be a significant systemic gastroprotective agent that could be utilized for the treatment and/or protection from gastric disturbances and related damage.

• Journal of Microbiology and Biotechnology
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• v.17 no.3
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• pp.520-523
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• 2007

Edible films of gelatin and com zein were prepared by incorporating nisin to the film-forming solutions. Com zein film with nisin of 12,000 IU/ml had an increase of 11.6 MPa in tensile strength compared with the control, whereas gelatin film had a slight increase with the increase of nisin concentration added. Water vapor permeability for both com zein and gelatin films decreased with the increase of nisin concentration, thus providing a better barrier against water. Antimicrobial activity against Listeria monocytogenes increased with the increase of nisin concentration, resulting in 1.4 log cycle reduction for com zein film and 0.6 log cycle reduction for gelatin film at 12,000 IU/ml. These results suggest that incorporation of nisin into com zein and gelatin films improve the physical properties of the films as well as antimicrobial activity against pathogenic bacteria during storage, resulting in extension of the shelf life of food products by providing with antimicrobial edible packaging films.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.333-336
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• 2005

웹구현을 위한 통합솔루션 환경과 재사용성 확장성의 확실한 장점을 지닌 COM+ 기술은 많은 연구를 통해 계속된 진화가 이루어지고 있다. 한편, COM+의 유용성을 이해하면서도 제어하고 관리할 수 있는 프로그램 개발과 유지보수 단계에서의 어려움은 상존한다. 본 논문에서는 CR다이어그램을 통해 운용을 모니터링 화하여 디버깅시 구조파악을통한 오류검출이 가능하도록 하였으며, 세부적으로 COM+를 그 실체인 Entity와 속성(Attribute)과 관계(Relationship)로 표현하여 구체화 하였다.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2531-2533
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• 2002

In this paper, we evaluate feasibility of an object-oriented method in a distributed real-time control environment through the prediction of delay expected. We adopt CAN as the distributed network and the application layer of the CAN is composed of client/server communication model of COM and surroundings for the support of real-time capability of the COM. Mathematical models formalizing delays which are predicted to invoke in the COM architecture are proposed. Sensors and actuators which are widely used in distributed network-based systems are represented by COM objects in this paper. It is expected that the mathematical models can be used to protect distributed network-based systems from violation of real-time features by the COM.

• Journal of the Korean Data and Information Science Society
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• v.28 no.4
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• pp.899-910
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• 2017

Nomogram is useful for predicting the prevalence of each patient through the scoring system without a complex formula. Because there are few studies on chronic otitis media (COM) in adults, this study aims to identify the relevant risk factors for COM in Korean adults and to build a nomogram for the risk factors. The Health Interview Survey data subset, derived from the Sixth Korean National Health and Nutrition Examination Survey (KNHANES VI), was used to evaluate the participants. Of the participants, the weighted prevalence of COM was 5.3%. Residence, earphone use, atopic dermatitis, allergic rhinitis, chronic rhinosinusitis, and subjective hearing status were identified as risk factors for COM. Using 6 risk factors, we propose a nomogram for COM, and use AUC to verify the discrimination of the nomogram.

• Resources Recycling
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• v.4 no.1
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• pp.20-24
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• 1995

When the slurry of water and coal which is produced from hydraulic coal mining was dehydrated by COM(Coal Oil Mixtue), the effects of flocculant were measured by light transmittance of supernatant liquid, The experimental results obtamed m this study are summarized as follows; The efficient flocculant is anionic flocculant(AllO), and in this case, the required concentration is about l00g/t. When diesel oil is used with flocculant, COM is formed in lower impeller speed than when only diesel oil is used. The amout of diesel oil required to form COM is 10% of that of coal.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04a
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• pp.69-72
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• 2001

CIS 기술 그룹과 데이터베이스 그룹간의 상호 연관된 연구의 필요성이 인식되면서, 시공간의 개념에 대한 동시 지원이 요구되고 있다. 또한 각 시스템간의 데이터 모델이 매우 다르기 때문에 지금까지 분산되어 있던 방대한 양의 공간 데이터에 대한 상호 운용성의 필요성이 증가함에도 불구하고 시스템의 통합 및 표준화의 진행이 어렵다. 이 논문에서는 분산된 공간 데이터의 상호 운용성을 제공하고 공간과 시간의 개념을 동시에 지원하기 위해 3차원 시공간 컴포넌트를 설계하고 이를 ATL/COM 을 사용하여 구현함으로써 COM 컴포넌트의 장점인 확장성과 재사용성을 그대로 수용하였다. 상호 운용성을 위한 통합 데이터 모델로써 OGC 의 2차원 표준 모델을 3차원과 시간 영역으로 확장시키고, 이를 기반으로 COM 컴포넌트 인터페이스를 설계하였다. 또한 공간 데이터를 WKB 구조로 정의하여 저장함으로써 시스템간의 이식성을 보장한다.

• The Journal of Fisheries Business Administration
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• v.37 no.1 s.70
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• pp.111-120
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• 2006

식품관련 시장조사 기관인 Food marketing Instittue에 따르면, 미국전체의 식료품체인 가운데 25%가 최소한 온라인 쇼핑을 운영하고 있다. Safeway, Albertsons 등 대형 수퍼마켓 체인들이 연이어 온라인 시장에 참가했고, Melon Seed, FreshDirect.com 등 신규업체도 참가했다. 2002년 5월 Safeway.cm을 설립한 Safeway는 동년 7월에 8번째 점포를 시애틀에 오픈하는 등, 온라인 비즈니스를 확대했다. 최근 할인매장, 드러그 스토어 둥에 일부 시장을 잠식당하고 있는 이들 전통적인 수퍼마켓 체인들은 고객의 이탈을 막기 위해 비록 소수이기는 하지만 고객의 온라인 수요에 대응할 필요성이 있다고 생각하기 때문이다. 본고의 목적은 미국의 식료품 온라인 쇼핑에서 발생하고 있는 여러 문제점을 지적하는 것이다. Webvan이 Dot Com의 실패를 예증하는데 사용되는 주요한 전자상거래 비즈니스이다. 오늘날 온라인 쇼핑 비즈니스의 도전을 보여주고 이익을 낳기 위해 취해야 할 조치를 논의하기 위해 온라인 쇼핑 밴더가 참조되고 있다. 또한 본고는 미국의 Vons.com, Peapod.com 그리고 Safeway.com과 같은 온라인 식료품 쇼핑 비즈니스에서 나타나고 있는 추세, 신규 영업자 및 잔존 영업자들의 특성과 온라인 식료품 쇼핑업자들의 성장에 필요한 요인들에 관해서도 논하였다.

• Physical Therapy Korea
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• v.27 no.2
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• pp.155-161
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• 2020

Background: The consequences of falls are often debilitating, and prevention is important. In theory, the lower the center of mass (COM), the greater postural stability during standing, and a weight belt at the waist level may help to lower the COM and improve the standing balance. Objects: We examined how the limit of stability (LOS) was affected by the lowered center of mass with the weight belt. Methods: Twenty healthy individuals participated in the LOS test. After calculating each participant's COM, a weight belt was fastened ten centimeters below the COM. Trials were acquired with five weight belt conditions: 0%, 2%, 4%, 6%, and 8% of body weight. Outcome measures included reaction time, movement velocity, endpoint excursion, maximum excursion, and directional control in 4 cardinal moving directions. Results: None of our outcome variables were associated with a weight belt (p > 0.075), but all of them were associated with moving direction (p < 0.01). On average, movement velocity of the COM and maximum excursion were 31% and 18% greater, respectively, in mediolateral than anteroposterior direction (5.4°/s vs. 4.1°/s; 97.5% vs. 82.6%). Conclusion: Our results suggest that postural stability was not affected by the weight-induced lowered COM, informing the development and improvement of balance training strategies.