한우 다태분만 ( 多胎分娩 ) 유도를 위한 호르몬 처리수준 결정시험

김희석,서국성,김종계,신원집 ( Hee Seok Kim,Kug Sung Suh,Jung Kye Kim,Won Jib Shin ) 한국축산학회 1980 한국축산학회지 Vol.22 No.6

This study was carried out to determine the dosage of PMS for increasing the rate of multiple births in Korean native cow. Animals were injected subcutaneously with 50G, 750, 1,000IU PMS, respectively on day 17 of the oestrus cycle followed intravenously by 1000IU HCG at the onset of the next oestrus (Only 1-2 Graffian follicles). The results obtained were as follows; 1. Most. of the cows treated witty 1000IU PMS exhibited normal oestrus behaviour(87.5%) and those treated with 500ICT revealed the poorest oestrus rate (56.6%) among the treatments. 2. Duration from the injection time with PMS to the onset of estrus was 4.8 days and was no significant difference among the treatments of various dosages of PMS. 3. The mean number of matured follicles per cow treated with 1000IU PMS was 1.3.

소에 있어서 다배란 유기에 영향을 미치는 요인에 관한 연구

김희석,김영진,이종문,이근상,정길생 ( H . S . Kim,Y . J . Kim,J . M . Lee,K . S . Lee,K . S . Chung ) 한국축산학회 1985 한국축산학회지 Vol.27 No.4

These experiment were conducted to investigate the effects of the kinds and dosages of gonadotropins, breed, parity, body weight, season, milk yield and serum total cholesterol (T-CHO) levels on ovarian responses in superovulated cattle. The number of follicles and corpus luteum (CL) per head in superovulated cattle were 6.6±080 and 4.8±0.72. Superovulation with FSH resulted in ovarian response more than that of PMSG and the best ovarian response in parity, body weight and season was showed in heifer, 350-450㎏ and autumn, respectively. In the calving-superovulation interval, below 5 month was showed poor ovarian response. In the lactating dairy cows, the best ovarian response was showed in below 15㎏/day of milk yield and decreased as milk yield increased. In the serum T-CHO levels, the best result was obtained from more than 150㎎/100㎖ and the ovarian response increased as the serum T-CHO levels increased.

해상 근무 승무원의 수학적 전신진동 해석 모델에 관한 연구

김희석,김홍태,박진형,Kim, Hee-Seok,Kim, Hong-Tae,Park, Jin-Hyoung 대한인간공학회 2003 大韓人間工學會誌 Vol.22 No.1

The resonance behaviour needs be understood to identify the mechanisms responsible for the dynamic characteristics of human body, to allow for the non-linearity when predicting the influence of seating dynamics, and to predict the adverse effects caused by various magnitudes of vibration. However, there are currently no known studies on the effect of vibration magnitude on the transmissibility to thoracic or lumbar spine of the seated person, despite low back pain(LBP) being the most common ailment associated with whole-body vibration. The objective of this paper is to develop a proper mathematical human model for LBP and musculoskeletal injury of the crew in a maritime vehicle. In this study, 7 degree-of-freedom including 2 non-rigid mass representing wobbling visceral and intestine mass, is proposed. Also, when compared with previously published experimental results, the model response was found to be well-matching. When exposed to various of vertical vibration, the human model shows appreciable non-linearity in its biodynamic responses. The relationships of resonance for LBP and musculoskeletal injury during whole-body vibration are also explained.

시간제약 조건을 고려한 CPLD 기술 매핑 알고리즘 개발

김희석,변상준,Kim, Hi-Seok,Byun, Sang-Zoon 대한전자공학회 1999 電子工學會論文誌, C Vol.c36 No.6

In this paper, we propose a new technology mapping algorithm for CPLD under time constraint. In our technology mapping algorithm, a given logic equation is constructed as the DAG type, then the DAG is reconstructed by replicating the node that outdegree is more than or equal to 2. As a result, it makes delay time and the number of CLBs to be minimized. Also, after the number of multi-level is defined and cost of each nodes is calculated, the graph is partitioned in order to fit to k that is the number of OR term within CLB. The partitioned nodes are merged through collapsing and bin packing is performed in order to fit to the number of OR term within CLB. In the results of experiments to MCNC circuits for logic synthesis benchmark, we can shows that proposed technology mapping algorithm reduces delay time and the number of CLBs much more than the existing tools of technology mapping algoritm. 본 논문에서는 시간제약 조건을 고려한 새로운 CPLD 기술매핑 알고리즘을 제안한다. 본 기술매핑 알고리즘은 주어진 논리식을 DAG로 구성하여 각 노드를 검색한 후, 출력에지가 2이상인 노드를 분할하지 않고 노드를 복제(replication)하여 DAG을 재구성함으로써 지연시간과 CLB의 개수가 최소화 되도록 하였다. 즉, 시간제약 조건과 소자의 지연시간을 이용하여 그래프 분할이 가능한 다단의 수를 정한다. 그런 다음 각 노드의 초기비용과 전체비용을 계산하여 CLB의 k-OR텀수보다 비용이 초과되는 노드를 분할하여 서브그래프를 구성한다. 분할된 서브그래프들은 collapsing을 통해 노드들을 병합하고 네 번째로 주어진 소자의 CLB안에 있는 k-OR텀 개수에 맞게 Bin packing를 수행하였다. 본 논 문에서 제안한 기술매핑 알고리즘을 MCNC 논리합성 벤치마크 회로들에 적용하여 실험한 결과 기존의 기술 매핑 툴인 TEMPLA에 비해 CLB의 개수가 18% 감소되었다.

PLD 설계용 툴 개발에 관한 연구

김희석,원충상,Kim, Hee-Suk,Won, Chung-Sang 한국정보처리학회 1994 정보처리논문지 Vol.1 No.3

본 논문에서는 디지틀 회로를 PLD 소자로 설계하는 PLD 설계용 툴인 PLD Designer 을 개발하였다. PLD Designer는 FSM(finite state machine)의 상태수가 제한적(20개 미만)일 경우, 상태표로부터 부울식을 추출할 수 있는 상태 그래픽 편집기(state graphic editor)와 상태 그래픽 편집기에서 생성된 부울식에 적합한 PLD 소자 (PAL 16R4, PAL22V10, GAL16V8 등)를 선정하여 핀 할당을 실현하는 핀 맵 편집기(pin map editor)로 구성되어 있다. 또한 핀 맵 편집기는 fuse map, checksum, JEDEC화일을 생성하며 PLD 디바이스 구현에 사용한다. 생성된 부울식을 검증하기 위해 테스트 벡터 (test vector) 생성 알고리즘을 개발하였으며 PLD Designer에 의해 생성된 JEDIC화일 과 PALASM의 JEDEC화일과 비교한 결과 동일함을 입증하였다. In this paper, we have developed a PLD Designer which is a design tool for digital circuits design using PLD device. PLD designer consists of a state graphic editor to extract boolean equations from state table within 20 states of FSM and a pin map editor to assign pin map for PLD device(PAL16R4, PAL22V10, GAL16V8, etc), which is suitable for extracted boolean equations. Also pin map editor generates a necessary JEDEC file to implement PLD device by using fuse map and checksum algorithm. To verify extracted boolean equation, we have developed simulation test vector generation algorithm. The results of JEDEC files generated by PLD designer is same with the results of JEDEC files generated by PALASM.

$GF(2^m)$에서 삼항 기약 다항식을 이용한 약한 쌍대 기저 기반의 효율적인 지수승기

김희석,장남수,임종인,김창한,Kim, Hee-Seok,Chang, Nam-Su,Lim, Jong-In,Kim, Chang-Han 대한전자공학회 2007 電子工學會論文誌-SD (Semiconductor and devices) Vol.44 No.8

유한체 $GF(2^m)$에서의 다항식의 지수승 연산은 암호학(Cryptography), DSP(digital signal processing), 에러 정정 코드에서 기본적인 연산으로 사용되어진다. 기존의 방법들은 지수승 연산을 병렬처리가 가능한 Right-to-Left 이진 방법으로 구성하여 연산시간을 줄이는 방법을 사용하였다. 본 논문에서는 기존의 다항식 기저에서 Right-to-Left 이진 방법으로 구성되었던 다항식의 지수승기를 약한 쌍대 기저 기반에서 삼항 기약다항식을 이용한 Left-to-Right 이진 형태로 구성한다. 제안하는 방법은 Left-to-Right는 고정된 다항식을 곱한다는 점에 착안, 사전계산을 이용하여 연산량을 감소시킨다. 본 논문에서 제안하는 방법은 제곱기(squarer)와 곱셈기(multiplier)를 모두 수행하는 시간이 기존 지수승기의 곱셈기의 연산 시간보다 같거나 작아 Left-to-Right 형태와 Right-to-Left 형태의 기존 지수승기보다 각각 기약 다항식이 $x^m+x+1$의 경우 약 17%, 10%, $x^m+x^k+1(1<k<m/2)$의 경우 약 21%, 9%, $x^m+x^{m/2}+1$의 경우 15%, 1%의 시간이 단축된다. An exponentiation in $GF(2^m)$ is a basic operation for several algorithms used in cryptography, digital signal processing, error-correction code and so on. Existing hardware implementations for the exponentiation operation organize by Right-to-Left method since a merit of parallel circuit. Our paper proposes a polynomial exponentiation structure with a trinomial that is organized by Left-to-Right method and that utilizes a weakly dual basis. The basic idea of our method is to decrease time delay using precomputation tables because one of two inputs in the Left-to-Right method is fixed. Since $T_{sqr}$ (squarer time delay) + $T_{mul}$(multiplier time delay) of ow method is smaller than $T_{mul}$ of existing methods, our method reduces time delays of existing Left-to-Right and Right-to-Left methods by each 17%, 10% for $x^m+x+1$ (irreducible polynomial), by each 21%, 9% $x^m+x^k+1(1<k<m/2)$, by each 15%, 1% for $x^m+x^{m/2}+1$.

소에 있어서 이식 수정란의 생존성에 영향을 미치는 요인에 관한 연구

김희석,오성종,양보석,유승환,김종국,이근상 ( H . S . Kim,S . J . Oh,B . S . Yang,S . H . Yoo,J . G . Kim,K . S . Lee ) 한국축산학회 1986 한국축산학회지 Vol.28 No.9

This experiment was conducted to investigate the effects of the number of embryos transferred, state (fresh or frozen), developmental stage of embryos and donor-recipient synchrony on pregnancy rate and embryonic loss in cattle. The animals used in this experiment were 95 heads of Korean native cattle, Holstein and crossbred. The results obtained in this experiment are as follows; 1. Fourty six out of 95 recipients (48.4%) were pregnant and embryo mortality rate (EMR) was 23.2%. 2. The pregnancy rate was higher when an embryo was transferred additionally on day 7after the AI on estrus (59.1%) than when one (45.6%) or two (40.0%) embryos were transferred. However, EMR was also higher when an embryo transferred additionally than the other groups. 3. The pregnancy rate of cows transferred fresh embryo was higher (56.0% vs 45.7%) and EMR of fresh embryo transferred cows was lower (20.0% vs 24.3%) compared with those of cows transferred frozen-thawed embryo. 4. The pregnancy rate was slightly higher (50.0% vs 48.1%) when the embryo of blastocyst stage was transferred than when the embryo of morals stage. However, EMR was slightly lower in the cows transferred morals stage embryo (22.8% vs 25.0%). 5. The pregnancy rate when the donors showed estrus 12 hours earlier than the recipients (76.9%) was higher than when the donors and recipients showed estrus at the same time (45.5%) or when the donors showed estrus 12 hours later than the recipients (37.5%). Similar trends were also noted in EMR.

파진행 문제를 위한 Paraxial 경계조건의 유한요소해석

김희석,이종세,Kim, Hee-Seok,Lee, Jong-She 한국전산구조공학회 2007 한국전산구조공학회논문집 Vol.20 No.3

무한영역에서 진행하는 탄성파를 유한영역에서 수치적으로 해석하기 위해 많은 흡수경계조건들이 제안되어져 왔다. Paraxial 경계조건은 흡수경계조건의 하나로서 스칼라 및 탄성파 방정식의 paraxial 근사화를 통해 얻어지며, 그 성능이 우수하고 수치해석시 계산적 부담을 주지 않는다. 그러나 경계조건이 복잡한 편미분 방정식으로 표현되어 있어 유한요소해석으로의 적용이 어렵다. 본 논문에서는 penalty function method를 이용하여 전체 에너지 범함수와 paraxial 경계조건을 함께 변분정식화 함으로써 유한요소해석을 수행하였다. 유한요소해석에 가장 적용이 용이하며, 많이 사용되어지는 Lysmer-Kuhlemeyer의 흡수경계조건과 성능을 비교함으로써 연구결과의 타당성을 입증하였다. For the propagation of elastic waves in unbounded domains, absorbing boundary conditions at the fictitious numerical boundaries have been proposed. In this paper we focus on both first and second order paraxial boundary conditions(PBCs) in the framework of variational approximations which are based on paraxial approximations of the scalar and elastic wave equations. We propose a penalty function method for the treatment of PBCs and apply these into finite element analysis. The numerical verification of the efficiency is carried out through comparing PBCs with Lysmer-Kuhlemeyer's boundary conditions.

상태합성기 설계를 위한 상태 CHDL 기술 및 기호최소화 알고리듬개발

김희석,Kim, Hi-Seok 대한전자공학회 1989 전자공학회논문지 Vol. No.

상태합성기를 설계하기 위해 상태 CHDL 기술 및 기호간소화 알고리듬을 제안하였다. 상태 CHDL은 PLA에 의한 FSM설계에 매우 적합하며 제안된 기호간소화 알고리듬은 단일큐브포함, 1거리병합 알고리듬을 이용하였다. BOLD 논리최소화 tool을 이용한 상태합성의 절차를 교통신호제어기 등의 예를 들어 설명하였다. A Symbolic cover Minimization Algorithm and State CHDL Description for Finite State Machine Synthesizer are Presented. State CHDL are used for design of PLA based finite state machine, also the symbolic cover minimization algorithms are based upon single cube containment and distance 1 merging algorithms. The procedure for state machine synthesizer has been applied to practical example, including traffic light controller by using Boulder Optimal Logic Design System.

한우정액의 이화학적 성장에 관한 연구

김희석,정길생 ( Hee S . Kim,Kil S . Chung ) 한국축산학회 1979 한국축산학회지 Vol.21 No.4

This experiment was carried out to clarify the physical and chemical characteristics of whole semen, seminal plasma and spermatozoa in Korean native bull. The results obtained were summarized as follows: 1. Semen volume, sperm density and total number of sperm were on the average 5.9±0.23 ㎖, 10.74±0.71 10^8/㎖ and 63.43±2.13 10^8 /ejaculate respectively. All of them were higher in Spring and Winter than in Summer and Autumn. 2. The pH value, viscosity, specific gravity and dry weight of whole semen were 6.5±0.03, 5.5±0.43, 1.036±0.002 and 9.9±0.20% respectively. The pH value was lowest in Summer while the viscosity and specific gravity were highest in winter and the dry weight was heaviest in Spring. 3. The mean values of sodium in whole semen, seminal plasma and spermatozoa were 195.87±76.8 ㎎/100㎖, 197.36±34.94㎎/100㎖ and 56.46±24.75γ/10^8 and those of potassium were 183.75±42.32 ㎎/100m1, 191.59±43.23 ㎎/100 ㎖ and 56.91±18.85 γ/10^8 respectively. The mean values of chloride were 353.23±44.82 ㎎/100 ㎖, 225.43±30.68 ㎎/100㎖ and 136.08±13.02γ/10^8 and those of total phosphorus were 60.37±6.21㎎/100㎖. 33.19±2.77 ㎎/100㎖ and 25.03±2.14 γ/10^8 respectively. 4. Concentrations of fructose and citric acid in whole semen were 393.60±77.55 ㎎/100 ㎖ and 552.58±67.12 ㎎/100 ㎖, in seminal plasma 722.40±181.14 ㎎/100 ㎖ and 649.06±61.82 ㎎/100 ㎖, and in spermatozoa 46.19±8.81 γ/10^8 arid 110.64±8.32γ/10^8. 5. Average total nitrogen values in whole semen, seminal plasma and spermatozoa were 1577.95±86.92 ㎎/100㎖, 1266.1±198.92 ㎎/100 ㎖ and 536.84±119.34γ/10^8, non-protein nitrogen in these were 351.8±99.21 ㎎/100 ㎖, 374.9±73.88 ㎎/100 ㎖ and 159.20±29.29 γ/10^8, and urea were 26.89±8.29 ㎎/100 ㎖, 38.24±10.25 ㎎/100 ㎖ and 5.94±1.45γ/10^8 respectively. 6. Total amino acid in whole semen, seminal plasma and spermatozoa were 8474.32 ㎎/100m1, 6901.73 ㎎/100 ㎖ and 3220.72γ/10^8 respectively. 7. Average values of the total lipid in whole semen, seminal plasma and spermatozoa were 702.4±53.9 ㎎/100㎖, 492.5±6.1 ㎎/100 ㎖ and 322.2±56.5 γ/10^8, phospho lipid 130.9±8.8 ㎎/100 ㎖, 83.7±6.8 ㎎/100 ㎖ and 70.5±9.9 γ/10^8, and total. cholesterol 282.4±41.3 ㎎/100 ㎖, 189.8±7.1 ㎎/100 ㎖ and 81.6±13.4γ/10^8 respectively.