• 한국정밀공학회지
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• 제31권11호
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• pp.1015-1021
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• 2014

This paper proposes the center distributed embroidery machine structure with 1,500 RPM, 52 heads for productivity and large sized embroidery goods. The synchronous velocity controller is adopted for control of the 2-axis distributed embroidery machine and the DOB(Disturbance Observer) is also adopted for minimizing disturbances caused by needle cams. For driving experiments of 2-axis center distributed driving structure, two conventional 26 heads 1,500RPM embroidery machines are used. It was shown that the center distributed driving structure with 2-axis synchronous control can be one way for implementing a large embroidery machine.

• 한국동물위생학회지
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• 제14권1호
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• pp.1-5
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• 1991

A serological survey for antibody of Leptospira spp. in canine was carried out from March to September, 1989 in Seoul. 182 serums collected from animal hospitals and keeping were collected and these were performed by using 12 different living antigens. In the microscopic agglutination test(MAT), being partial agglutination reaction at a serum dilution of 1：200 or over, we recorded it as positive. These results were compared with the species, sex and general conditions of canines, the areas and types of animal keeping. The results were summarized as followed ; 1. We detected the antibodies L. grippotyphosa 1 and L. icteroheamorrhagiae 1 in A area(total 48 heads ), L. canicola 1 and L. icterohaemorrhagiae 4 in B area(total 52 heads), L. hardjo 1 and L. icterohaemorrhagiae 2 in C area (total 32 heads), L. icterohaemorrhagiae 1 in D area(total 23 heads) L. grippotyposa 1 and L. icterohaemorrhagiae 2 in E area(total 27 heads) by MAT. There were positives for L. canicola 1, L. grippotyposa 2, L. hardjo 1 and L. icterohaemorrhagiae 10 in 5 areas by MAT. 2. The deteclive rate of leptospiral antibody in Jindo canine was 17.6% (3) among 17, Mixed 4.4% (4) among 90 and Exotic 9.3% (7) among 75 heads. 3. The Male(91 heads) was positive for 8.7%(8) and the female(91 heads) was positive for 6.5%(6). 4. In the vaccination, positive rate was 10.3% (7) among 55 heads, and in the unvaccination, positive rate was 5.5%(7) among 127 heads.

• 대한수의학회지
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• 제15권2호
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• pp.327-332
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• 1975

Parasitological and biochemical studies for 82 heads (12.2%) showing sterility syndrom out of 672 heads of Korean native cattle were undertaken by analysis of blood values for their contents and examination of their vaginal swabs for Tritrichomonas foetus 1. Tritrichomonas infection of Korean cattle revealed 7 positive cases (8.54%) out of 82 infertile heads. 2. Contents of their serum protean, carotenoid, vitamin A and phosphorus were determined in summer and winter season and the following results were obtained. a) In summer season, average blood value of 30 cattle showing sterility syndrom were determined as protein 7.52g/100ml, carotenoid 165.1g/100ml, vitamin A 173.9 IU/100ml and phosphorus 7.48mg/100ml, respectively. b) In winter. season, average blood value of 52 cattle showing sterility syndrom were determined as protein 7.76g/100ml, carotenoid 413.3g/100ml, vitamin A 174,3 IU/100ml and phosphorus 7.54mg/100ml, respectively.

• 한국수정란이식학회지
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• 제5권2호
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• pp.38-44
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• 1990

This study was carried out to produce superior dairy cattle by embryo transfer. Seven dairy cows were superovulated with divided injection of FSH 4Omg for 5 days started on day 9 to 14 of the estrus cycle and injection of PGF$_2$$\alpha$ 45mg on day 4 of FSH injection. Donor cows were flushed to collect embryos on day 7 or 8 of the estrus cycle. Fresh embryos collected were transferred to synchronized dairy recipients or frozen using glycerol 3 step method to he equilibrated. And 35 embryos which were frozen using glycerol 6 step method were imported from U.S.A. After glycerol dilution of frozen embryos was done by reverse density during freezing. frozen-thawed embryos were transferred to synchronized dairy or beef recipients. The results obtained were as follows; 1. Total of 24 embryos were collected from 7 donor cows flushed and transferable embryos were 18 (75.0%). 2. Among 24 embryos. morula, early blastocyst, blastocyst, expanded blastocyst and unfertilized ova were 3 (12.5%), 1 (4.2%), 10 (41.6%), 4 (16.7%) and 6 (25.0%), respectively. 3. Heat inducing rate after 1st and 2nd injections of PGF$_2$$\alpha$ in Holstein and beef cattle was 83.3% and 71.4% and 62.5% and 69.2%, respectively. 4. Among 56 recipients, 23 head were pregnant (41.1%). The pregnancy rate of fresh embryos was 50.0% (1/2 heads) and the pregnancy rate of frozen embryos which were frozen using glycerol 3 step and using glycerol 6 step imported from U.S.A. was 52.6%(l0/19 heads) and 34.3%(12/35 heads), respectively. 5. The pregnancy rate of blastocyst (60.0%) was higher than that of morula (39.0%), early blastocyst (25.0%) and expanded blastocyst (0%). 6. The pregnancy rate of grade I embryos (52.2%) was higher than that of grade 2 (34.6%) and grade 3 (28.6%). 7. The pregnancy rate according to synchrony of recipient with donor was higher in simultaneous recipient (55.0%) and +l2hrs' (53.8%) than -24hrs' (23.5%), -l2hrs' (20.0%) and +24hrs' (0%).

• 대한수의학회지
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• 제11권1호
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• pp.55-58
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• 1971

At the Seoul first slaughter house, 2,964 heads of swine were examined for the infection and distribution of Cysticercus tenuicollis. The results were summarized as follows. 1. The Cysticercus tenuicollis were detected from 106 heads of swine and the infection rate were 3.58 percent. 2. Incidence at each province were 5.7% in Jeon-ra-puk Do, 4.4% in Chung-cheong-nam Do, 3.83% in Kyong-sang-nam Do, 3.57% in Jeon-ra-nam Do, 2.52% in Kang-won Do, 1.75% in Kyong-sang-puk Do, and Kyong-gi Do and Seoul City were not recognized. 3. The monthly variation of the infection of Cysticercus tenuicollis were not found nearly through a year. 4. The usual habitat of Cysticercus tenuicollis were recognized the omentum and liver, but unusually one case was found around the rectum.

• 전자공학회논문지
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• 제52권3호
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• pp.213-220
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• 2015

저렴한 다수의 센서들로 구성되는 WSN(Wireless Sensor Network)은 운용 특성상 한 번 배치되면 전원의 교체가 불가능하기에 효율적인 에너지 관리는 중요한 문제이다. 에너지 효율성을 위한 방법 중 네트워크를 몇 개의 클러스터로 나누고 모든 센서들을 클러스터 헤드와 멤버 노드로 구분하는 클러스터링은 에너지 효율적인 WSN을 위한 매우 좋은 라우팅 기법이다. 최초의 클러스터 기반 라우팅 프로토콜인 LEACH는 정해진 확률에 따라 랜덤하게 클러스터 헤드를 선출한다. 하지만 선출된 헤드의 네트워크 내 분포가 적절하지 못 한 경우 클러스터 헤드들의 균일한 에너지 소비를 보장할 수 없고 이로 인해 시간에 따른 생존 노드 수 성능이 많이 감소할 수 있다. 이러한 점에 착안하여 논 본문에서는 클러스터 헤드 선택 시 모든 노드의 잔존 에너지를 비교한 뒤 최대 잔존 에너지를 갖는 노드를 헤드로 선택하는 방법을 제안한다. 노드 간 잔존 에너지 차이를 감소시켜 헤드였던 노드가 더욱 오랫동안 멤버 노드로서 역할을 할 수 있고 이로 인해 더욱 향상된 네트워크 생존 기간과 더 많은 데이터가 기지국으로 도착함을 확인할 수 있었다.

• 한국가축번식학회지
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• 제8권2호
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• pp.92-96
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• 1984

This study was carried out ot examine the sex ratios of offspring in swine. The sex ratios were obtained on the basis of the data from 15,892 pigs produced by 1,728 litters of Landrace, Large Yorkshire, Hampshire and Duroc breeds at National Animal Breeding Institute from 1975 to 1980. The results obtained are summarized as follows: 1. The sex ratio of total offspring was 51.47% for male and significant at 5% level, and Landrace and Duroc breeds were 51.46% and 52.27% for male and significant at 5% level, respectively, but no significant difference between the breeds. 2. The sex ratio of offspring by years was 52.74% for male and significant at 5% level in 1979, but no significant difference for other years and between years. 3. The sex ratio of offspring by seasons were a little highly 51.65% and 51.25%, for male in spring and autumn, but no significant difference, respectively. 4. The sex ratio of offspring by parities were 52.65% and 55.81% for male in groups of the 3rd to 4th and the 5th to 6th parity, and significant difference at 5% and 1% level, respectively. 5. The sex ratio of offspring by groups of litter size was 52.65% for male in 1 to 6 heads group, and significant difference at 5% level, but no significant difference between groups of litter size.

• 한국수정란이식학회지
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• 제25권1호
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• pp.51-55
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• 2010

The relationships of scrotal circumference (SC) to semen characteristics and the conception rate (70 days-nonreturn rate) of artificial insemination in farm were studied with 137 heads of bull in Hanwoo. The average and range of SC were $38.27{\pm}3.90$ cm and 26.0~52.5 cm, respectively. Hanwoo bulls were classified with SC, divided into 34 cm below group, 34~39 cm group, and 39 cm over group. The 5,487 semen records of 43 heads of bull from July. 1. 2007 to June. 30. 2008. were used to determine the relationships between SC and semen characteristics. The semen concentration and total sperm number of each group were 11.18, 16.68, and $17.4{\times}10^8/ml$, and 69.83, 101.64 and $114.40{\times}10^8$/ejaculate. The bulls with 34 cm or more SC were higher than the bulls with 34 cm below in semen concentration and total sperm number (p<0.01). But between SC and semen volume have no significant relationship (p>0.05). The 9,862 mating records of 44 farm with 137 heads of bull were used to determine the relationships between SC and conception rate. The conception rate of 1st artificial insemination were 73.31, 74.16, and 77.33 % in each group. Also SC was positively correlated with pregnancy rate (r=0.12, p=0.17). These results indicate that SC correlates positively with semen characteristics, and maybe with pregnancy rate in Hanwoo.

• The Plant Pathology Journal
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• 제29권1호
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• pp.52-58
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• 2013

Fusarium head blight (FHB) caused by the filamentous fungus Fusarium graminearum is one of the most severe diseases threatening the production of small grains. Infected grains are often contaminated with mycotoxins such as zearalenone and trichothecences. During survey of contamination by FHB in rice grains, we found a bacterial isolate, designated as BN1, antagonistic to F. graminearum. The strain BN1 had branching vegetative hyphae and spores, and its aerial hyphae often had long, straight filaments bearing spores. The 16S rRNA gene of BN1 had 100% sequence identity with those found in several Streptomyces species. Phylogenetic analysis of ITS regions showed that BN1 grouped with S. sampsonii with 77% bootstrap value, suggesting that BN1 was not a known Streptomyces species. In addition, the efficacy of the BN1 strain against F. graminearum strains was tested both in vitro and in vivo. Wheat seedling length was significantly decreased by F. graminearum infection. However, this effect was mitigated when wheat seeds were treated with BN1 spore suspension prior to F. graminearum infection. BN1 also significantly decreased FHB severity when it was sprayed onto wheat heads, whereas BN1 was not effective when wheat heads were point inoculated. These results suggest that spraying of BN1 spores onto wheat heads during the wheat flowering season can be efficient for plant protection. Mechanistic studies on the antagonistic effect of BN1 against F. graminearum remain to be analyzed.

• PNF and Movement
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• 제21권1호
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• pp.47-52
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• 2023

Purpose: This study aims to examine the functional difference in the long and short heads of the biceps brachii by investigating the onset time of muscle contractions in the biceps brachii in the supination motion according to whether the flexor of the elbow joint is excluded. Methods: This study was conducted with 21 healthy men aged in their 20s. While performing forearm pronation at an elbow flexion angle of 90 degrees, the onset time of muscle contractions in the long and short heads of the biceps brachii was measured and compared in a posture where the humerus is placed on a table and the posture is lifted against gravity. Using an independent samples t-test, the difference in the onset time of muscle contractions in the long and short heads of the biceps brachii was analyzed. Results: The onset time of the long head was shorter if the flexor activity of the elbow joint was excluded, while that of the short head of the biceps brachii was shorter if it was not excluded. Conclusion: It is noted that the long head of the biceps brachii mainly functions as a supinator muscle, while the short head of the biceps brachii plays a role in stabilizing and maintaining flexion of the elbow joint.