• Journal of Institute of Control, Robotics and Systems
• /
• v.6 no.8
• /
• pp.629-637
• /
• 2000

Unbalance between user requirements and insufficient network resources makes a congestion. In the future since the communication networks will have very heavy traffic congestion will be more serious. The ATM networks was recommended to support the B-ISDN service for the future multimedia communication. In thie sense of congestion avoidance and recovery the ABR service category in ATM networks allows the feedback flow control mechanism to dynamically allocate the idle bandwidth of the network to users fairly and to control the network congestion rapidly In this paper we introduce a congestion control scheme using systematical approach to confirm robust stability with respect to unknown round trip delay for the network which has both unicast and multicast connections.

• Proceedings of the Korean Society for Agricultural Machinery Conference
• /
• 2003.02a
• /
• pp.418-422
• /
• 2003

농가에서는 재배하고 있는 과채류는 접목하지 않은 실생묘를 육묘하여 사용하거나 공정육묘장에서 실생묘 혹은 접목묘를 구입하여 사용하고 있으며, 특히 접목묘의 경우는 거의 대부분 공정육묘장에서 육묘된 모를 사용하고 있다. 수박, 오이, 참외의 박과채소는 연작장해의 피해를 줄이고 만할병을 방지하며 저온신장을 도모하기 위해서 접목재배를 많이 실시하고 있다. 또한 터널이나 노지 재배의 경우에는 접목을 하게되면 내습성을 높일 수 있다. 참외의 경우에는 세근이 많이 발달하지만 흡비력이 약하다. 그러나 대목으로 쓰이는 호박은 뿌리의 발달이 왕성할 뿐만 아니라 흡비력이 강하다. (중략)

• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.1551_1552
• /
• 2009

In this paper, we presented the packaging technologies of CMOS ISFET(Ion Sensitive Field Effect Transistor) pH sensor using post-CMOS process and MCP(Multi Chip Packaging). We have proposed and developed two types of packaging technology. one is one chip, which sensing layer is deposited on the gate metal of standard CMOS ISFET, the other is two chip type, which sensing layer is separated from CMOS ISFET and connected by bonding wire. These proposed packaging technologies would make it easy to fabricate CMOS ISFET pH sensor and to make variety types of pH sensor.

• 한국신재생에너지학회:학술대회논문집
• /
• 2007.06a
• /
• pp.276-279
• /
• 2007

This study aims to present the application of pv system for apartment buildings. Regarding to the domestic housing politics to improve residing environment and effective use of country land, apartment buildings have been constructed since early of 1790's. Now apartment is taking over 50% out of entire housing in Korea. PV System of apartment buildings has been developed periodically and recently gable roof or canopy is popular which pv installation is more favorable. For balcony part with double skin facade sassy window, it has a preferable condition to install on the wall depending on the window direction. In case of superhigh floor apartment buildings where facade is mostly double skin facade of curtain wall system, pv module can replace the traditional curtain wall and will reduce architectural materials and obtain various out look design thereof. So, the purpose of this research is a basic study for clean energy source and present to applicability of pv systems for apartment buildings in preliminary design step.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2013.02a
• /
• pp.692-693
• /
• 2013

The effects of Climate change and Installation Price for Photovoltaic System were investigated through power generation analysis and economic analysis though. Photovoltaic System would be the same as governmental regulated 3 KW capacity used for the analysis. Also climate information which are serviced on the KMA (Korea Meteorological Administration) used as well. The experimental results indicate that climate change and installation price change could be influenced more higher on photovoltaic system than last 30-years. Furthermore the economic advantages could be higher on the future.

• Environmental Analysis Health and Toxicology
• /
• v.25 no.1
• /
• pp.1-10
• /
• 2010

Monitoring toxicity levels in specific biological compartments is necessary to evaluate the ecotoxicological risk associated with soil environmental pollution. Gene expression, as potential biomarker, is increasingly used as rapid early warning systems in environmental monitoring and ecological risk assessment procedures. Various representative species are currently used for the purpose of assessing soil toxicity, however, investigations on toxicological assessments using endpoint based on gene-level have been limited. In this review, we will present the current trends in organisms and endpoints used in soil toxicity study and report gene expression related to toxicity using soil organism, and C. elegans as promising organisms for this approach.

• Proceedings of the Korean Society for Bio-Environment Control Conference
• /
• 1994.05a
• /
• pp.117-120
• /
• 1994

우리나라의 92년 시설채소 재배면적은 50,064ha이며 이중 과채류 재배면적은 32,608ha로 매년 증가 추세이며 기존의 파이프하우스를 이용한 간이시설 재배면적은 3,970ha로 증가하고 있다. 간이시설 재배시 병발생이 노지재배보다 억제되었고, 수량은 57-64%, 소득은 23% 증대된 것으로 보고되었다. 일본에서는 톱날형, 우산형, 테라스형이 개발되어 과채류를 여름철 고온기에 재배하고 있다. 동남아 지역에서는 간이시설로 병충해를 억제하고 재배환경을 개선해 나가고 있는 실정이며 주년안정생산을 위해 여름철의 불량한 재배환경을 개선할 수 있는 시설개발이 요청되고 있다. (중략)

• Journal of Korean Library and Information Science Society
• /
• v.37 no.2
• /
• pp.231-253
• /
• 2006

This study intends to make a comprehensive inquiry about the theoretical foundations of cataloging outsourcing. To the end, this study examined (1) backgrounds of cataloging outsourcing, 2) the pros and cons of cataloging outsourcing, (3) theoretical justification suggested by guardians of cataloging outsourcing, and (4) methodological limitations found in literatures on the subject. On the basis of it, finally suggested are methodologies for evaluating 'effectiveness' of cataloging outsourcing.

• Korean Journal of Veterinary Research
• /
• v.8 no.2
• /
• pp.117-120
• /
• 1968

Normal value of serum proteins of cockerels and pullets was obtained by seperating serum proteins of 80(♂40, ♀40)immature domestic fowls for routine clinical application purpose, using paper and agar electrophoresis. The concentration count of serum proteins which were fractionated was determined by using densitometer and planimeter. The fractionation value of serum proteins (of cockerels and pullets was indicated in the table 1. The composition of serum proteins by paper and agar electrophoresis showed remarkable differences between cockerels and pullets, but only ${\beta}$-globulin could not found difference between them.

• Electronics and Telecommunications Trends
• /
• v.26 no.6
• /
• pp.97-107
• /
• 2011

2000년대 이후 전 세계적으로 곡물 재고율 하락이 장기화되고, 인구증가 및 생활 여건의 개선에 따라 식량부족 상태의 심화가 예측됨에 따라 세계 각국은 곡물의 생산성 제고 및 품질향상 방안을 확보하고자 노력하고 있다. 농업 IT 융합기술은 기존의 농업기술에 IT 고유기술을 농업에 융합시켜 농업의 생산 유통 소비 전 과정에 걸쳐 생산성과 효율성 및 품질향상 등과 같은 고부가가치 창출을 추구하고자 하는 기술이다. 크게 보면 축산업 분야도 포함되는 것이지만 여기에서는 재배 작물의 생산에 국한하고, IT 기술 중에서 USN 기술을 적용한 USN 기반의 IT 기술을 농업에 융합하는 분야로 한정한 기술의 연구 동향을 고찰하고자 한다. 노지 작물과 시설원예 작물 및 외부 환경에 영향을 받지 않는 새로운 개념인 식물공장에 IT 기술을 적용하기 위하여 필요한 사항을 고찰하고, 국내외 기술개발 및 표준화 동향과 향후 추진되어야 할 기술적 이슈들을 제시하였다.