환경조건과 시설이 돼지의 생산성에 미치는 영향(하)

김동균,Kim, Dong-Gyun 대한양돈협회 1989 養豚 Vol.11 No.1

돈육생산비를 절감시키기 위한 첫단계 과제는 사료비를 최소화 하는 것이다. 그런데 현실적으로 사료의 품질과 돼지의 능력은 이미 국제수준에 도달해 있으므로, 사료비의 절약을 위한 현실적인 대책은 사료요구율을 최소 수준으로 유지할 수 있도록 환경을 조성해 주는 것이라 할 수 있다. 따라서 최근 양돈업계에서 크게 관심을 모으고 있는 생산성 향상을 위한 관리요인과 환경적 요소 그리고 시설요인에 대해 4회에 걸쳐 김동균 교수(상지대 축산학과)의 글을 연재하기로 한다

空中勤務者와 一般勤務者의 體力에 關한 比較 硏究

金東均 空軍士官學校 1987 論文集 Vol.24 No.-

공중근무자와 일반근무자 간의 체격, 체력의 차를 규명하여 공중근무자를 위한 체력육성방안의 기초자료를 제공함을 목적으로 연구를 시도한바 다음과 같은 결론을 얻었다. 1. 신체의 영태적 발육정도를 알아보기 위하여 신체발달의 생리적 과정을 나타내는 중요한 지표로서 가장 기본적인 인체의 길이를 나타내며 성장의 척도가 되는 신장과 신체의 발육상태를 나타내는 체중을 측정 비교한 결과는 두 그룹간 의의있는 차가 없었다. 2. 체력은 신체의 운동능력을 평가하는 요인으로 스피드의 100m Dash, 근지구력의 Sit up, 전신 지구력의 1,500m 달리기 순발력의 스탠딩 브로드 점프, 근력의 pull-pus를 측정하였으며 결과는 100m Dash, 1,500m 달리기, 스탠딩 브로드 점프, pull-ups에서는 의의있는 차가 없었으나 situp의 경우는 매우 의의있는 것으로 나타났다. 이 관계에 대한 후속 연구가 기대된다.

자세 천이 고속비행 모드를 갖는 수직이착륙 무인기 연구

김동균,이병진,이영재,성상경 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.11

Organic/Inorganic Hybrid Star-shaped Polymer Electrolytes for Lithium Battery Applications

김동균,손해성,김성곤,이애리,이종찬 한국공업화학회 2012 한국공업화학회 연구논문 초록집 Vol.2012 No.-

Organic/Inorganic Hybrid Star Polymer Electrolytes with Silsesquioxane Core : Synthesis and Ionic Conductivity

김동균,손해성,이애리,이종찬 한국공업화학회 2011 한국공업화학회 연구논문 초록집 Vol.2011 No.-

TiO_2 nanotube stimulate chondrogenic differentiation of limb mesenchymal cells by modulating focal activity

김동균,진은정,Bohm Choi,Jinsoo Song,Sunhyo Kim,Seunghan Oh,진은희,Shin-Sung Kang 생화학분자생물학회 2011 Experimental and molecular medicine Vol.43 No.8

Vertically aligned, laterally spaced nanoscale titanium nanotubes were grown on a titanium surface by anodization,and the growth of chondroprogenitors on the resulting surfaces was investigated. Surfaces bearing nanotubes of 70 to 100 nm in diameter were found to trigger the morphological transition to a cortical actin pattern and rounded cell shape (both indicative of chondrocytic differentiation), as well as the up-regulation of type II collagen and integrin β4 protein expression through the down-regulation of Erk activity. Inhibition of Erk signaling reduced stress fiber formation and induced the transition to the cortical actin pattern in cells cultured on 30-nm-diameter nanotubes,which maintained their fibroblastoid morphologies in the absence of Erk inhibition. Collectively, these results indicate that a titanium-based nanotube surface can support chondrocytic functions among chondroprogenitors,and may therefore be useful for future cartilaginous applications Vertically aligned, laterally spaced nanoscale titanium nanotubes were grown on a titanium surface by anodization,and the growth of chondroprogenitors on the resulting surfaces was investigated. Surfaces bearing nanotubes of 70 to 100 nm in diameter were found to trigger the morphological transition to a cortical actin pattern and rounded cell shape (both indicative of chondrocytic differentiation), as well as the up-regulation of type II collagen and integrin β4 protein expression through the down-regulation of Erk activity. Inhibition of Erk signaling reduced stress fiber formation and induced the transition to the cortical actin pattern in cells cultured on 30-nm-diameter nanotubes,which maintained their fibroblastoid morphologies in the absence of Erk inhibition. Collectively, these results indicate that a titanium-based nanotube surface can support chondrocytic functions among chondroprogenitors,and may therefore be useful for future cartilaginous applications.

환경적응을 위한 경영혁신방법

김동균 한국산업경영시스템학회 1996 한국산업경영시스템학회지 Vol.19 No.38

This paper asserts that business innovation methodology will enables companies to fit into the change of business environment and improve the productivity and effectiveness. Business innovation can be implemented using total quality management(TQM), benchmarking, business reengineering, CALS et al. Information technology will be useful tools that enables companies to fit into the radical change of environment and offer the added values to customers.

A Study on Intention Exchange-based Ship Collision Avoidance by Changing the Safety Domain

김동균 해양환경안전학회 2019 海洋環境安全學會誌 Vol.25 No.3

Even if only two ships are encountered, a collision may occur due to the mistaken judgment of the positional relationship. In other words, if an officer does not know a target ship’s intention, there is always a risk of collision. In this paper, the experiments are conducted to investigate how the intention affects the action of collision avoidance in cooperative and non-cooperative situations. In non-cooperative situation, each ship chooses a course that minimizes costs based on the current situation. That is, it always performs a selfish selection. In a cooperative situation, the information is exchanged with a target ship and a course is selected based on this information. Each ship uses the Distributed Stochastic Search Algorithm so that a next-intended course can be selected by a certain probability and determines the course. In the experimental method, four virtual ships are set up to analyze the action of collision avoidance. Then, using the actual AIS data of eight ships in the strait of Dover, I compared and analyzed the action of collision avoidance in cooperative and non-cooperative situations. As a result of the experiment, the ships showed smooth trajectories in the cooperative situation, but the ship in the non-cooperative situation made frequent big changes to avoid a collision. In the case of the experiment using four ships, there was no collision in the cooperative situation regardless of the size of the safety domain, but a collision occurred between the ships when the size of the safety domain increased in cases of non-cooperation. In the case of experiments using eight ships, it was found that there are optimal parameters for collision avoidance. Also, it was possible to grasp the variation of the sailing distance and the costs according to the combination of the parameters, and it was confirmed that the setting of the parameters can have a great influence on collision avoidance among ships.

밀리미터파를 이용한 무혈 혈당 측정에 관한 기초 연구

김동균,원종화,Potapov Sergey N.,Meriakri Viacheslav V.,Chigryai Evgenii E. 대한전자공학회 2005 電子工學會論文誌-SC (System and control) Vol.42 No.1

As a basic research for the development of a non-invasive blood glucose sensor using millimeter waves, we have presented a method for measuring the dielectric properties of high loss dielectrics, based on the reflection method, and investigated the variation of the dielectric properties of glucose-water and glucose-0.9% NaCl solutions in the 10~90 GHz range. In the proposed method, a minimal reflection condition is formed by placing a specially-chosen low-loss plane-parallel plate in front of a high-loss medium under test at a given frequency range. Using the minimal power reflection coefficient and the corresponding frequency at this condition, the dielectric properties of the medium can be determined. The measured results on pure water have shown the adequacy of the proposed method. The measured results on glucose-water and glucose-0.9% NaCl solutions in the 10~90 GHz range showed that the variations of the dielectric properties of glucose solutions according to the change of their glucose concentration were maximum in the 30~45 GHz range. From these facts we concluded that the variation of about 3 mmole/L in the glucose solutions must be distinguished with the measurement accuracies of ±0.1 dB and ±0.01 GHz.. 본 논문은 밀리미터파를 이용한 무혈혈당측정기 개발의 기초연구로서, 높은 유전손실을 지닌 유전체의 반사 유전특성 측정법을 제시하고, 이에 의해 10~90 GHz의 밀리미터파 대역에서 글루코오스 농도에 따른 글루코오스 수용액 및 글루코오스-0.9% NaCl 용액의 유전특성 변화를 조사하였다. 제시된 측정법은 측정 유전체의 앞단에 평행평면판을 배치하여 측정 주파수 대역 내에서 전력반사계수가 최소가 되는 최소반사조건이 형성되도록 하고, 이 조건에서 측정된 최소 전력반사계수와 주파수로부터 측정 유전체의 유전특성을 결정할 수 있는 방법이다. 순수의 유전특성에 대한 측정 결과들은 제시된 측정법의 타당성을 입증하였다. 또한 10~90 GHz 대역에서 글루코오스 농도 변화에 따른 글루코오스 용액 및 글루코오스-0.9% NaCl 용액들의 유전특성 변화에 대한 실험을 통해, 타 대역에 비해 30~45 GHz 범위에서 글루코오스 농도 변화에 의한 각 용액들의 유전 특성의 변화가 최대임을 알 수 있었다. 이를 통해 본 측정법에서 전력반사계수와 주파수의 측정 정밀도가 각각 ±0.1 dB와 ±0.01 GHz일 경우, 대략 3 mmole/L 정도의 분해능으로 용액 내 글루코오스 농도 변화를 측정할 수 있음을 보였다.

Ad Hoc 통신망에서의 QoS 지원을 위한 연구 사례

김동균,최양희 한국정보과학회 정보통신 소사이어티 2001 정보통신 기술 Vol.15 No.2