• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2005.10a
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• pp.115-118
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• 2005

1. 도체특성 대조구와 비교하여 생봉독 1처리구와 2처리구의 경우 암퇘지와 거세돼지 모두에서 도체중, 도체율이 증가하였으며, 등지방두께도 두꺼워졌다. 이러한 도체특성은 도체등급을 향상시켜 A와 B등급 출현율이 높아져 경제적으로 유리한 것으로 사료되었다. 2. 육질특성과 PSE육 발생율 대조구와 비교하여 생봉독 1처리구와 2처리구의 경우 암퇘지와 거세돼지 모두에서 등심육의 일반성분중 지방함량이 높은 수준을 나타내었고, pH와 보수력이 높고, 육즙손실과 가열감량이 낮아 우수한 육질특성을 나타냈다. 그 외 주관적 판정의 마블링 점수가 높았고, 육색측정에서도 진한 적색을 나타내어 우수한 외관을 보여주었다. PSE육 발생율에서는 암퇘지와 거세돼지 모두에서 무처리구에 비해 3개 생봉독처리구에서 발생율이 감소했는데, 특히 생봉독2처리구가 낮았다.

• Journal of the Korea Society for Simulation
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• v.29 no.1
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• pp.23-30
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• 2020

In this paper, we theoretically examine the characteristics of an Artificial Magnetic Conductor (AMC) constructed of a perfect electric conductor and a normal material having permittivity ε_r, permeability μ_r, and thickness L. First, we derived rigorous equations to describe the infinite AMC structure. Then, we studied how the AMC's characteristics are affected by changes in ε_r, μ_r and L. The operating center frequency exhibiting a 0° reflection coefficient phase occurs when L is one quarter of a guide wavelength. Therefore, the AMC thickness can be reduced by using a material having a high product of ε_r and μ_r. As the ratio μ_r/ε_r increases, the bandwidth of the AMC increases (maximum value: 200 %), and its operating frequency decreases. We also find out he bandwidth of the AMC is improved by introducing a loss in the material. To validate the AMC, we design a dipole antenna on the AMC and demonstrate a relationship between AMC phase and dipole antenna's operating frequency by investigating the dipole on the AMC with different pairs of ε_r and μ_r.

• Korean Journal of Poultry Science
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• v.17 no.1
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• pp.33-44
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• 1990

This studies were conducted to investigate the difference of carcass characteristics between chicken broiler and duck broiler and the carcass characteristics of chicken broiler by sex, rearing type, season and feed and water deprivation with 240 chicken broilers and 20 duck broilers. The results obtained are summerized as follows. 1. The carcass yields were 65.43% in chicken broiler and 66.78% in duck broiler. The abdominal fat pad of chicken broiler was higher than that of duck broiler. 2. There were differences in commercial cuts production percentages between chicken broiler and duck broiler, and the commercial cut of chicken broiler was produced from drumsticks and thighs, breast back, wings and neck in order. 3. Although there was little difference in carcass yields between male and female of broiler, the abdominal fat pad of male broiler was lower than that of female broiler. 4. The carcass yields in cage and floor type were not different, but the abdominal fat pad in cage was slightly higher than that in floor. 5. There was no difference in carcass yields among Spring, Summer, Autumn and Winter, but the abdominal fat pad was highest in Summer and lowest in Winter. 6. As feed and water deprivation time increased by one hour, live weight was decreased by 0.28365% , and the carcass yield was highest after 6 hours depribated feed and water.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.12 no.3
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• pp.89-98
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• 1998

Some analytic results for a solenoid eddy current coil to test nondestructive conducting materials are described in this paper. Normalized impedance of solenoid coil encircling cylindrical conducting tubes or tow-conductor rods is analyzed. Electrical and magnetic properties such as conductivity, permeability and exciting frequency as well as the geometric ones of fill factor or radius ratio of the conductor are also considered. Impedance characteristics of the models obtained by numerical analysis are examined. Validation of the model is carried out using several samples of non-ferromagnetic conducting tubes and 2-conductor rods.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2005.05a
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• pp.253-255
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• 2005

국내 도입 운영되고 있는 돼지 도체 냉각방법과 냉각실의 온도에 따른 PSE 발생율을 비교하여 최적의 냉각조건을 설정하고자 수행한 결과, 도체 냉각방법에 따른 PSE 발생율은 사후 초기 90분간 도체 냉각시 냉수 냉각과 급속냉각방법이 일반적으로 사용하고 있는 완만냉각 방법에 비하여 약 22%정도 PSE 발생율이 낮은 것으로 분석되었다(p<.0001). 사후 초기 90분간 냉각실 온도에 따른 PSE 발생율을 비교한 결과 냉각실 실제온도를 $-5{\sim}7^{\circ}C$로 운영한 경우가 이보다 높거나, 낮게 운영하는 것 보다 $4{\sim}14%$의 낮은 PSE발생율을 보였다(p<0.0001).도체등급판정 후 $3{\sim}5$시간에는 냉각실 온도는 유의적인 차이를 보이지 않았다. 이상의 결과에서 사후 초기 90분간의 온도관리의 중요성을 알 수 있었으며, PSE 발생율과 냉각단축을 줄이기 위해서는 초기 90분간 냉각실온도를 $-5{\sim}7^{\circ}C$로 운영하는 것이 바람직하다고 판단된다.

• Food Science of Animal Resources
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• v.26 no.2
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• pp.183-188
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• 2006

This study was carried out to investigate the carcass grade and characteristics of pigs by carcass weight and backfat thickness. Data used in this experiment were collected and analyzed from a total of 656 pigs composed of 128 gilts and 528 barrows at commercial public slaughter house. The carcass grade of gilts was superior to that of barrow. The carcass weight by gender tended to be heavier in castrated pig than in gilt. Backfat was significantly (p<0.05) thicker in castrated pig than in gilt. Differences between castrated pig and gilt on meat colour, marbling standard, water holding capacity, and marketing age were not significantly found. However, the level of carcass grade was higher ratio in gilt group than in castration. The appearance of percentage of PSE (pale, soft, exudative) of gilt group was superior to that of castrated group. There were significant differences among carcass weight in the marbling score (p<0.05) and water holding capacity (p<0.05). There was significant difference among backfnt thickness in carcass weight (p<0.05), marbling score (p<0.05) and water holding capacity (p<0.05).

• Journal of Animal Science and Technology
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• v.52 no.4
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• pp.313-318
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• 2010

The Jeju native pigs of 168 heads (116 barrows and 52 gilts) were examined to investigate the carcass characteristics related to gender, meat quality grades and yield grades. The averages of carcass characteristics for Jeju native pigs were 72.94 kg for carcass weight, 20.98 mm for backfat thickness, 38.14 for Hunter L*, 4.68 for a*, 6.04 for b*, 5.61 for pH, 3.61 for visual plate meat color, 3.36 for marbling scores, 1.83 for meat quality grades and 2.08 for yield grades, respectively. The carcass weight of gilts was significantly higher than that of barrows (p<0.05). There were no significant differences between barrows and gilts in carcass percent, backfat thickness, and meat color. The pH of barrows was significantly higher than that of gilts (p<0.05). The differences between gender groups were significantly noticed in carcass quality grades, and yield grades (p<0.05). The carcass weight, carcass percent, backfat thickness, and marbling scores for pigs with high grades(1 and 2 grades) were significantly higher than those for pigs with low grades (p<0.05). However, there was no significant difference among 4 carcass grades. The carcass weight, carcass percent, backfat thickness, pH, and meat color for carcass with high yield grades were significantly higher than those for carcass with low grades (p<0.05). The meat colors for Hunter L*, a* and b* were not significantly shown in carcass yield grades.

• Monthly Duck's Village
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• s.68
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• pp.60-61
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• 2009

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2006.05a
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• pp.184-187
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• 2006

대조구와 비교하여 T3처리구(10% 홍삼 부산물, 0.2% 사료급여)에서 일당 증체량과 사료효율이 우수한 경향을 나타냈다. 홍삼 부산물 급여구는 대조구와 비교하여 도체율이 높은 경향이었으며, 도체장도 다소 길어지는 경향을 나타냈다. 도체 등급 판정 결과에서는 대조구와 T3, T4처리구에서 A등급 출현율이 80%이상으로 나타나 바람직한 경향이었다. 이상의 결과에서 홍삼 부산물 급여는 거세돈의 사양 성적이나 도체 특성을 개선시킬 수 있을 것으로 사료되었다.

• Journal of Animal Science and Technology
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• v.54 no.1
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• pp.29-33
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• 2012

This study was carried out to investigate carcass grade of pigs according to gender, feed intake, backfat thickness, carcass weight, etc. Data from a total of 26,983 heads in 5 farms were collected. The results obtained were as follows; The difference was significantly found in carcass quality grade between barrows and gilts (p<0.001). The meat grade $1^+$ was high in gilts, but meat grade 1 was high in barrows, respectively. The carcass weight of 85.8 kg was lightly shown significantly (p<0.05) in group I taken little quantity of feed consumption. However, that of 89.5 kg was heavily shown in group IV taken plenty of feed consumption. Meat grade 2 was significantly (p<0.001) high ratio in group of backfat thickness with less than 15 mm (67.5%). However, the ratio for the grade 1 was high in group of 15~19 mm. The ratio for the meat grade 2 was highly shown in group of carcass weight with more than 85 kg (54.3%). On the other hand, that of grade 1 was highly shown in group of 78~84 kg. In conclusion, pigs for marketing to enhance high quality have been appropriately raised with the optimum system in consideration of feed intake, carcass weight, backfat thickness, etc.