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이준구 ( Lee Jun-koo ),김광수 ( Kim Kwang-soo ),박선규 ( Park Sun-kyu ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.1
Except long-span bridge decks, most of Bridge decks are usually made of reinforced concrete, for no other material has a better combination of low cost. However, reinforced concrete decks are vulnerable to deterioration and fatigue. In Korea, there are all 21,117 (highway or road)bridges, and Girder bridges which are equipped bridge decks reaches its 30%. And also 95% of bridge decks are made of reinforced concrete. So recently, interests about steel-concrete composite deck for bridge are getting higher. Beyond many previous studies about steel-concrete composite bridge deck, there are three types of steel-concrete composite decks. One type is called Embedded I-beam Composite deck(E. I. C). E. I. C has very performable strength capacity.
최적 설계된 PSC Girder 교량용 강합성 바닥판의 휨내력에 관한 실험적 연구
이준구(Lee Jun Koo),박준명(Park Jun Myung),박선규(Park Sun Kyu),김형열(Kim Hyeong Yeol),정연주(Jeong Youn Ju) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
Except In long-span bridges, these decks are usually made of reinforced concrete. for no other material has a better combination of low cost. However, In long-span bridges, reinforced concrete decks are vulnerable to deteriaration and fatigue. In Korea, there are all 21,117 (highway Of road)bridges, and Girder bridges which are equipped bridge decks reaches Its 30%. And also 95% of bridge decks are made of reinforced concrete. So recently, interests about steel-concrete composite deck for bridge are getting higher. Beyond many previous studys about steel-concrete composite bridge deck, optimized sections are decided for 2 types. In tins study, optimized steel-concrete composite decks for PSC girder bridges were experimented for flexural strength. And this paper presents the result of a study on flexural strength of optimized steel-concrete composite deck for PSC girder bridge. A total SIX optimized steel-concrete copmposite budge decks were constructed, tested The response of the decks in terms of deflections, strains and modes of failure were examined
이준구(Lee Jun-Koo),김광수(Kim Kwang-Soo),박선규(Park Sun-Kyu) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.- No.-
Except long-span bridge decks, most of Bridge decks are usually made of reinforced concrete, for no other material has a better combination of low cost. However, reinforced concrete decks are vulnerable to deterioration and fatigue. In Korea, there are all 21,117 (highway or road)bridges, and Girder bridges which are equipped bridge decks reaches its 30%. And also 95% of bridge decks are made of reinforced concrete. So recently, interests about steel-concrete composite deck for bridge are getting higher. Beyond many previous studies about steel-concrete composite bridge deck, there are three types of steel-concrete composite decks. One type is called Embedded I-beam Composite deck(E. I. C). E. I. C has very performable strength capacity.
최적 설계된 PSC Girder 교량용 강합성 바닥판의 휨내력에 관한 실험적 연구
이준구 ( Lee Jun Koo ),박준명 ( Park Jun Myung ),박선규 ( Park Sun Kyu ),김형열 ( Kim Hyeong Yeol ),정연주 ( Jeong Youn Ju ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
Except in long-span bridges, these decks are usually made of reinforced concrete, for no other material has a better combination of low cost. However, In long-span bridges, reinforced concrete decks are vulnerable to deteriaration and fatigue. In Korea, there are all 21,117 (highway or road)bridges, and Girder bridges which are equipped bridge decks reaches its 30%. And also 95% of bridge decks are made of reinforced concrete. So recently, interests about steel-concrete composite deck for bridge are getting higher. Beyond many previous studys about steel-concrete composite bridge deck, optimized sections are decided for 2 types. In this study, optimized steel-concrete composite decks for PSC girder bridges were experimented for flexural strength. And this paper presents the result of a study on flexural strength of optimized steel-concrete composite deck for PSC girder bridge. A total six optimized steel-concrete copmposite birdge decks were constructed, tested. The response of the decks in terms of deflections, strains and modes of failure were examined.
김병기,하재정,이준구,오동엽,정대진,최성복,황은경,김수정,이제영,Kim, Byung Ki,Ha, Jae Jung,Yi, Jun Koo,Oh, Dong Yep,Jung, Dae Jin,Choi, Seong Bok,Hwang, Eun Gyoung,Kim, Soo Jung,Lee, Jea Young 한국데이터정보과학회 2016 한국데이터정보과학회지 Vol.27 No.5
본 논문은 계란에 대한 소비자들의 인식을 향상시키기 위해 산란계 종류에 따른 계란품질과 성분조성을 실험 및 분석하였다. 산란개시 32주령에 있는 4개 품종의 청색란실용계 (BC), 연산오골계 (YS), 재래닭 (KN), 백색레그혼 (WL) 총 120수 (각 처리구당 10수 ${\times}$ 3반복 ${\times}$ 4처리구)를 임의 배치하여 생산된 계란의 성분을 분석하였다. 계란의 품질 평가의 경우, BC가 다른 품종에 비하여 호우닛 계수 (82.82),난각강도 (0.37mm) 및 난각두께 ($40.58kg/cm^2$)가 유의적으로 높게 나왔으며, 계란의 콜레스테롤 함량은 BC가 317.58mg/100g로 가장 낮았지만, YS는 381.30mg/100g으로 매우 높게 나타났다 (p<0.05). 그리고 계란의 지방산 조성에서 oleic acid (C18:1n9)함량은 BC가 다른 품종보다 매우 낮았으며, 아미노산의 경우에는 Thronine과 Proline을 제외한 모든 성분에서 대체로 WL종이 다른 품종보다 더 높게 나타났다 (p<0.05). This study was to execute the random arrangement of total 120 heads (10 heads per treatment plot ${\times}$ 3 repeats ${\times}$ 4 treatment plots) for four breeds [Blue arakana commercial Fowl (BC), Yeonsan silky fowl (YS), Korean native fowl (KN), White leghorn fowl (WL)] with the initiation of laying hens at 32 weeks old in order to comparatively analyze egg quality and composition by sorts of laying hens. In case of evaluation of the quality of eggs, this study has shown that BC had higher degree of Haugh unit coefficient (82.82) and in case cholesterol content of eggs, BC had significantly low content as 317.55mg/100g, but YS had rather higher content as 381.30mg/100g. Furthermore, this study has found out that BC had significantly low Oleic acid (C18:1n9) and WL had higher Amino acid content by breeds than those of other breeds (p<0.05).
사육방식의 차이가 거세한우의 등심내 콜티졸 수준 및 지방산조성에 미치는 영향
하재정,오동엽,이준구,이제영,이지홍,박영식,Ha, Jae Jung,Oh, Dong Yep,Yi, Jun Koo,Lee, Jae-Young,Lee, Ji Hong,Park, Young Sik 한국데이터정보과학회 2015 한국데이터정보과학회지 Vol.26 No.3
본 연구는 사육방식의 차이가 한우 등심내 콜티졸과 지방산함량에 미치는 영향을 구명하고자 실시하였다. 무항생제 및 관행축산으로 생산된 한우육 1등급 등심 부위를 3종류의 브랜드별로 각각 3회씩 총 18점을 구매하여 시료로 공시하였고, 분석한 결과는 다음과 같다. 한우육 등심내 콜티졸 함량은 무항생제 처리구에서 관행사육 처리구 대비 유의적 (p=0.0176)으로 낮게 나타났으며, 포화지방산 및 불포화지방산 함량에서는 유의적 (p >0.05)인 차이를 나타내지는 않았으나, 관행사육 처리구에서는 포화지방산이, 무항생제 처리구에서는 불포화지방산이 각각 높은 경향으로 분석되었다. 또한, 불포화지방산 중 n-3과 n-9 지방산을 제외한 n-6 지방산에서 유의적 (p <0.01)인 차이를 보였다. 또한, 한우 등심내 콜티졸 농도와 n-6 지방산 농도간의 상관관계를 분석한 결과 유의적 (p=0.0014)으로 부 (-)의 상관관계가 성립되었다. This study was carried out to elucidate the effect of different rearing system on cortisol level, stress hormone, and fatty acid composition in the edible muscle tissues. These steers were reared in two different systems including antibiotic-free (ARS) and conservative system (CRS). In the M-Longissimus tissue, cortisol level was significantly lower in ARS than CRS, (p=0.0176). But, the levels of total saturated and unsaturated-fatty acids does not differ in ARS as CRS (p >0.05). However, the total saturated fatty acid levels tended to be greater in CRS and the total unsaturated fatty acid levels tended to be greater in ARS. However, the level of n-6 unsaturated fatty acid was higher in ARS than CRS (p=0.004). Especially, levels of linoleic acid (LA) and ${\gamma}$-linolenic acid (GLA) were significantly higher in ARS (p <0.01). Cortisol level and the n-6 fatty acid content in muscle tissue were negatively correlated (at p=0.00140.) In conclusion, ARS may produce beef with higher quality which contains lower cortisol and greater n-6 fatty acids, such as ALA and GLA.
김병기,하재정,이준구,오동엽,정대진,황은경,이제영,Kim, Byung Ki,Ha, Jae Jung,Yi, Jun Koo,Oh, Dong Yep,Jung, Dae Jin,Hwang, Eun Gyeoung,Lee, Jea Young 한국데이터정보과학회 2016 한국데이터정보과학회지 Vol.27 No.4
본 연구는 한방생균제 첨가급여가 거세한우육의 이화학적 특성 및 지방산, 아미노산 조성에 미치는 영향을 알아보기 위하여 거세한우 50두 (5처리${\times}$10두)를 공시하여 육질을 분석하였다. 육의 조지방 함량은 T2그룹과 T3그룹이 유의적 높았으나, 가열감량은 Con 2그룹이 가장 높았다 (p<0.05). 보수력은 56.73~60.16% 범위로, 전반적으로 처리그룹이 대조그룹보다 더 높았으며, 그 중에서 T3그룹이 유의적으로 높았다 (p<0.05). 콜레스테롤 함량은 41.64~47.33 mg/100g 범위로, 그 중에서 Con 1그룹이 유의적으로 높았다 (p<0.05). 또한 관능평가인 다즙성, 연도, 향미는 T3그룹이 매우 높게 나타났다 (p<0.05). 그리고 지방산 조성에서 올레인산과 무파 T2그룹과 T3그룹이 유의적으로 높았으나 (p<0.05), 아미노산 함량은 처리그룹 간에 거의 차이가 없었다. 이 결과에서 한방생균제 첨가급여는 한우육의 육질개선 및 불포화 지방산에 영향을 미치며 고급육 생산에 도움이 될 것으로 판단된다. This study was carried out to investigate the effect of dietary addition of herbal probiotics on the Hanwoo steers' physiochemical property. A total of 50 Hanwoo steers (5 treatment groups${\times}$10 heads) were used. The crude fat content of beef has been found significant high in T2 and T3 group, and the Con 2 group had the highest heating loss (p<0.05). The water-holding capacity ranged from 56.73% through 60.16%, and the treatment group was generally higher than the control group. In particular, the T3 group showed significantly high water-holding capacity (p<0.05). The cholesterol content ranged from 41.64mg/100g through 47.33mg/100g. In the overall and the Con 2 group had significantly high cholesterol content (p<0.05). Furthermore, the oleic acid and MUFA had significant high T2 and T3 group in the fatty acid composition (p<0.05), but the amino acid content made no difference between the treatment groups.