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항공기 외장형 정찰 장비용 냉각 시스템의 성능 특성에 관한 실험적 연구
정대윤,이행복,Jung, Daeyoon,Lee, Hang Bok 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.1
In this paper, we have proposed a vapor cycle refrigeration system as a cooling system to provide cooling air to the aircraft external reconnaissance stores. In the proposed vapor cycle system, receiver which prevents refrigerant from subcooling was eliminated and thermal expansion valve was replaced with electronic expansion valve. The vapor cycle refrigeration system is aimed to provide cooling air to the reconnaissance stores which is added to the aircraft in the form of external store. The wide temperature range of ambient air from the flight conditions can decrease the cooling performance and can make the refrigeration system unstable in low ambient temperature. Performance characteristics of the vapor cycle refrigeration system has been experimented under air conditions which is derived from the flight envelope. From the experiments, the vapor cycle refrigeration system has been proved to provide enough cooling air to the reconnaissance equipment and to be stable under all the flight conditions.
한약재 재료의 혼합비율에 따른 한방 삼계탕의 기호도와 품질특성
정대윤 ( Dae Yun Jeong ),황수정 ( Su Jung Hwang ),이성희 ( Sung Hee Lee ),은종방 ( Jong Bang Eun ) 한국식품저장유통학회(구 한국농산물저장유통학회) 2012 한국식품저장유통학회지 Vol.19 No.5
The physiochemical characteristics and sensory properties of the Samgyetang herb to which different dried medicinal herbs were added were investigated to find the best formulation for the product. For the Samgyetang herbal product, Schizandra chinensis, Atractylodes lancea, Glycyrrhiza uralensis, and Zizyphus jujube were used at a fixed ratio in the formulation, and Paeonia lactiflora (PL), Codonopsis lanceolata (CL), and Scutellaria baicalensis (SB) were added, with different amounts. The pH of Samgyetang increased along with the SB amount, and the soluble-solid content increased along with the CL amount. S7, which had the highest SB addition level, had the highest L value, and the b values were the highest in S7, which had the highest SB addition level. In the sensory evaluation, S7, which had the highest amount of SB, had the highest score in flavor, taste, and overall acceptability. In conclusion, the best formulation for Samgyetang would include PL 8 g, CL 4 g, SB 12 g, Schizandra chinensis 6 g, Atractylodes lancea 4 g, Glycyrrhiza uralensis 2 g, and Zizyphus jujube 4 g.
한약재 첨가량에 따른 한방 삼계탕의 이화학적 및 관능적 특성
정대윤 ( Dae Yun Jeong ),황수정 ( Su Jung Hwang ),범서우 ( Seo Woo Beorn ),김건희 ( Gun Hee Kim ),은종방 ( Jong Bang Eun ) 한국식품저장유통학회(구 한국농산물저장유통학회) 2013 한국식품저장유통학회지 Vol.20 No.2
우리의 고유 음식인 삼계탕에 인지기능 향상 및 뇌질환 예방 효과를 가지고 있는 도라지, 더덕, 석창포를 부재료로 이용하여 한방 삼계탕의 제조를 위한 최적 혼합 비율을 설정하곶 한약재 부재료의 혼합 비율에 따른 품질 특성과 관능적 특성을 조사하였다. 삼계탕 국물의 pH는 석창포의 함량이 가장 많은 한약재 조합인 S2는 4.57로 가장 낮은 값을 보였으며, 당도는 더덕의 함량이 가장 높은 S3에서 3.87°Brix로 다른 시료에 비해 유의적으로 높은 함량을 보였다. 명도와 황색도는 더덕의 함량이 가장 많은 한약재 조합인 S3에서 가장 낮은 값을 보였으며, 반면에 적색도는 더덕 혼합 비율이 증가함에 따라 a값도 증가하는 경향을 보였다. 관능검사 결과 향미는 도라지의 함량이가장 많은 시료에서 가장 높은 기호도를 보였으나, 이를 제외한 색, 맛 전체적인 기호도는 더덕의 함량이 가장 높은 한약재 혼합 비율에서 가장 높은 점수를 보였다. 본 연구 결과, 한방 삼계탕 제조를 위한 한약재의 혼합 비율은 도라지, 석창포, 삽주, 감초, 대추는 각 4g, 오미자 6g, 그리고 더덕 12g이 가장 적합하다고 판단된다. The physicochernical and sensory properties of herb samgyetang, ginseng chicken soup added with medicinal herbs wert investigated to determine the optimum addition level of rnedicinal herbs. The pH of herbsamgyetang decreased with increasing addition level of the Acorus grarnineus addition level, and the soluble solid content increased as the Codonopsis lanceolata addition level increased. The herb samgyetang with the highest Codonopsis lanceolata addition level bad the lowest L and b value. In contrast, the a value increased with increasing Codonopsis lanceolata addition level. In sensory evaluation, the highest color, taste, and overall acceptability scores were obtained by the herb samgyetang with the highest Codonopsis lanceolata addition level. In conclusion, the optimum addition levels of medicinal herbs for herb Samgyetang are as follows: Platycodon grandiflorum 4 g, Acorus gramineus. 4 g, Codonopsis lanceolata 12 g, Schizandra chinensis 6 g, . Atractylodeslancea 4 g, Glycyrrhiza uralensis 4 g. and Zizyphus jujube 4 g.
김민수,허준호,정대윤,김민지,김도연,전호현,김경민,박수빈,김희영,Kim, Min-Soo,Heo, Jun-Ho,Jung, Dae-Youn,Kim, Min-Ji,Kim, Do-Yeon,Jeon, Ho-Hyeon,Kim, Kyung-Min,Park, Su-Bin,Kim, Hee-Young 대한고유수용성신경근촉진법학회 2020 PNF and Movement Vol.18 No.1
Purpose: This study aimed to investigate the current and future status of Parkinson's disease rehabilitation service in Busan. Methods: A literature search of domestic journals was conducted using the keywords "Parkinson's", "exercise", "rehabilitation", and "physical therapy". The chosen databases were Research Information Sharing Service (RISS), e-articles, and Korean studies Information Service System (KISS). International literature was searched in PubMed, Pedro, DOI, Publisher, CINAHL (EBSCOhost), and PsycINFO using the same combination of keywords. Results: The results of this study showed that 33 medical institutions provide Parkinson's disease rehabilitation service and five do not. Regarding the composition of Parkinson's disease rehabilitation teams, 15 medical institutions provide physical therapy, occupational therapy, and speech therapy as their rehabilitation program, 15 medical institutions provide physical therapy and occupational therapy, and three provide only physical therapy. The study found that muscle-strengthening, flexibility, endurance, and balance exercises were commonly provided in all 33 medical institutions for Parkinson's disease. Additional exercises were provided in only three medical institutions. The frequency was five times a week in 20 medical institutions. Conclusion: Medical institutions located in Busan provide a variety of Parkinson's disease rehabilitation services, not only in general hospitals but also in multiple medical institutions, although the composition of their Parkinson's disease rehabilitation teams and the frequency of treatment vary.
통합해석기법을 활용한 공대공 및 지대공 적외선 미사일 대응 초음속 항공기의 중적외선 및 원적외선 신호 분석
김태환,배지열,김태일,정대윤,황창수,조형희,Kim, Taehwan,Bae, Ji-Yeul,Kim, Taeil,Jung, Daeyoon,Hwang, Chang Su,Cho, Hyung Hee 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.6
The stealth performance of supersonic aircraft in recent air battlefield is one of the most significant feature for latest fighters. Especially, as the technology is advancing, the IR stealth capability becomes more important because of its passive characteristic. To design an aircraft with stealth capability, we must know how much the IR signature is generated from the aircraft. Also, predicting the IR signature of enemy's aircraft is tactically crucial. In this study, we calculated MWIR and LWIR infrared signature of $5^{th}$ generation supersonic aircraft against air-to-air and surface-to-air threat using IR simulation code and CFD coupled procedure.
공대공 적외선 미사일의 항력을 고려한 초음속 항공기의 피격성 분석
김태일,김태환,이환성,배지열,정대윤,조형희,Kim, Taeil,Kim, Taehwan,Lee, Hwanseong,Bae, Ji-Yeul,Jung, Dae Yoon,Cho, Hyung Hee 한국군사과학기술학회 2017 한국군사과학기술학회지 Vol.20 No.2
An infrared-guided missile has been emerging as a major threat against combat aircraft due to its passive guidance characteristics and with recent advances in stealth technology. Hence, the infrared stealth technology and its effectiveness-evaluation technique become more significant than ever before. In this study, we applied missile aerodynamics to lethal range calculation which allowed more precise prediction. CFD analyses were newly involved in estimating drag force characteristics of an infrared-guided missile. Velocity profiles during flight period of the missile were constructed utilizing these drag characteristics and then incorporated into our in-house code to predict corresponding lethal ranges. The results showed that the present method can predict lethal range more appropriately than the previous one with constant velocity profile. As one of the results, if a fighter gains altitude more which reduces less drag of the attacking missile, then the lethal envelope increases significantly more compared to the lock-on envelope.
다양한 단계별 자돈 사양프로그램이 자돈기 및 이후 육성,비육기 성장성적에 미치는 영향
이재현 ( Chai Hyun Lee ),정대윤 ( Dae Yun Jung ),박만종 ( Man Jong Park ),이철영 ( C Young Lee ) 한국축산학회 2014 축산기술과 산업 Vol.5 No.3
본 연구는 자돈기 동안 유제품 함량인 다른 사료들의 급여기간을 달리 했을 때 자돈기 및 이후 육성·비육기 성장성적에 미치는 영향을 조사하여 값비싼 유제품 함량이 높은 자돈사료 사용량을 줄일 수 있을지의 여부를 판단하기 위해 수행되었다. 총 204두의 21일령 암 및 거세 이유자돈을 6개 돈방(실험단위) 애 배치하고 33일 3호 사료와 육성·비육된 1호 사료를 다음과 같이 3개 사양프로그램에 따라 급여하였다. `고 유제품` 구: 자돈 1, 2 & 3호 각각 7, 14 & 12일; `중 유제품`구:자돈 2 & 3호 각각 14 & 19일 ;`저 유제품`구: 지돈 2 & 3호 및 육성·비육돈 1호; 각각 7, 14& 12일. 자돈기 이후에는 실험구당 14두씩 총 84두 (실험단위)를 임의로 선발하여 54-96, 96-135 및 135-182일령 기간 동안 각각 육성·비육돈 1, 2 & 3호 사료를 급여하고 도 축하였다. 자돈기 종료체중과 일당증체량은 고, 중 및 저 유제품 구 간 차이가 없었다(14.8, 13.3 & 13.7kg 및 273, 225 & 237 g). 자돈기 일당사료섭취량은 고 유제품 구가 중 및 저 유제품 구보다 높았으나(p<0.01)사료효율은 세 실험구 간 차이가 없었다. 182일령 체중 및 54~182일령 기간의 일당증체량은 고 & 중 쥬제품 구가 저 유제품 구보다 높았고 (체중: 110.0, 107.6 &99.6kg), 등자방두께와 도체등급은 실험구 간 차이가 없었다. 결론적으로 중 유제품 프로그램을 쓰면 일반적으로 쓰이는 유제품 프로그램에 비해 자돈성장은 저하될 수는 있겠지만 출하돈 두당 생산비는 저하될 것이고, 저 유제품 프로그램은 육성·비육기 성장 저하를 초래하기 때문에 비효율적일 것이다.
김태환,송지운,차종현,배지열,정대윤,조형희,Kim, Taehwan,Song, Jiwoon,Cha, Jong Hyun,Bae, Ji-Yeul,Jung, Daeyoon,Cho, Hyung Hee 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.4
Infrared(IR) guided heat-seeking missiles uses IR emissions from aircraft to detect and track a target. Due to passive characteristic of the IR guidance, early detection of the missile is difficult and it is significant threat to aircraft survivability. Therefore, IR signature prediction of the aircraft is an important aspect of the stealth technology. In this study, we simulated IR signature of the aircraft in real atmospheric conditions. Aircraft surface temperature distribution was calculated by using RadthermIR code. Based on temperature distribution, IR radiance and BRDF(Bidirectional Reflectance Distribution Function) image were simulated for different weather(seasonal) and background(sky/soil) conditions. The IR contrast tendencies are not aligned with surface temperature or magnitude of target IR radiance. Therefore, it is essential to simulate IR signature with various conditions and background to acquire reliable database.