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능동형 태그를 포함한 900MHz RFID 교육용 시스템의 설계
김휴찬 ( H. C. Kim ),올자스 ( A. Ohlzahas ),김종민 ( J. M. Kim ),진효석 ( H. S. Jin ),조동관 ( D. G. Cho ),정중수 ( J. S. Chung ),강오한 ( O. H. Kang ),정광욱 ( K. W. Jung ) 한국인터넷정보학회 2007 인터넷정보학회논문지 Vol.8 No.4
본 논문에서는 RFID 기술 중 리더와 태그간 900MHz 대역을 사용하여 교육용 시스템 설계를 제시하였다. 능동형 태그와 리더의 설계를 임베디드 환경에서 제시하였으며 리더와 접속 가능한 서버의 소프트웨어 개발은 PC 윈도우 운영체제 환경에서 실현하였다. 개발 환경으로는 AT89C51ED2가 리더와 태그의 프로세서로, 개발 언어는 C 언어로, 이를 제어하기 위하여 케일 C 컴파일러가 사용되었다. 서버인 PC에서는 비쥬얼 스튜디오상의 비주얼 C 언어가 사용되었다. 시스템의 기능 점검을 위하여 PC에서는 리더를 통해 태그 주소를 인지하고, 메모리에 데이터를 읽고 쓰는 기능을 첨가하여 900MHz 대역의 RFID 교육용 소프트웨어 시스템을 구성하였다. This paper presents the development of RFID educational system based on using 900MHz air interface between the reader and the active tag. The software of reader and the active tag is developed on embedded environment, and the software of PC controlling the reader is based on window OS operated as the server. The AT89C51ED2 VLSI chip is used for the processor of the reader and the active tag. As the development environment, Keil compiler is used for the reader and the active tag of which the programming language is C. The visual C language of the visual studio on the PC activated as the server is used for development language. To verify the function of the system, PC gets the tag`s identification number through the reader and send the data to write the active tag memory a certain content as "write" operation . Finally the data written from the active tag`s memory is sent to the PC via the reader as "read" operation and compare the received data with one already sent to the tag.
암모니아 처리 보리짚의 절단길이가 한우의 채식 및 반추행동에 미치는 영향
김종민 ( C M Kim ),이병석 ( B S Lee ),정태영 ( T Y CHUNG ) 한국축산학회 1994 한국축산학회지 Vol.36 No.5
This experiment was conducted to determine the effect of cutting length of ammoniated barley straw on eating and ruminating behavior of Korean Native Cattle. Three Korean Native Cattles averaging 350㎏ body weight were assigned to a 3 × 3 Latin square design according to ammoniated barley straw lengths of 3㎝, 9㎝ and 15㎝. The results are as follows: 1. Eating time was significantly longer with 9㎝ and 15㎝(P$lt;0.05) than with 3㎝. Increasing cutting lengths of ammoniated barley straw resulted in prolongation of ruminating and total chewing time. 2. Number of chews during eating was highest with 9㎝, but the number of chews during ruminating; and total chewing were increased as the cutting length increased. 3. The chewing speed 1 [Daily chewing numbers of ruminating/Daily ruminating time(sec)]was highest with 15㎝, but chewing speed 2 [Daily total chewing numbers/Daily total chewing time(sec))was highest with 3㎝. 4. Eating rates of DM and NDF were significantly higher with 3㎝(P$lt;0.05) than with 9㎝ and 15㎝, but ruminating and chewing efficiency were highest with 9㎝ and 3㎝, respectively. 5. Increasing cutting lengths of ammoniated barley straw resulted in increased the number of boluses per day, but the chews per bolus and chewing time per bolus were highest with 15㎝.
김종민(C . M . Kim),정태영(T . Y . Chung) 한국축산학회 1993 한국축산학회지 Vol.35 No.4
This experiment was conducted to determine the effect of cutting length of rice straw on ruminating behaviour of sheep. Three ruminally fistulated sheep averaging 40 ㎏ body weight were assigned to a 3 × 3 Latin square design by cutting length of rice straw (3㎝, 9㎝ and 15㎝). The results are as follows: 1. Increasing cutting length of rice straw resulted in the increase of ruminating and total chewing time. 2. Number of chews during eating, ruminating and total chewing were increased as the cutting length of rice straw were longer. 3. The chewing speed 1 [Daily chewing numbers of ruminating/Daily ruminating Time(sec)] was in accordance with the cutting length, but chewing speed 2 [Daily total chewing numbers/Daily total chewing time(sec)] was more rapid when sheep were led 3㎝ cutting length of rice straw. 4. Eating rate of DM and NDF were increased as the cutting length of rice straw was shorter, but ruminating and chewing efficiency were the highest at 9㎝ cutting length. 5. Increasing in cutting length of rice straw resulted in increased number of boluses per day, but number of chews per bolus was in accordance with the cutting length of rice straw.