지진하중을 받는 고강도 콘크리트 기둥의 횡보강근이 변형능력에 미치는 영향

박관식,황선경,한병찬,성수용,임경택,정수영 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2

Since increasing use of HSC despite of main defect like brittle characteristic except of some fortes, it is much more important to improve performances of High-Strength Concrete(HSC) columns, nowadays. Therefore, it is common to use higher strength steel in HSC for the purpose of ductility and strength improvement. But, since the current building code requirements was evaluated to the results of tests related to NSC, current code requirements may nat be adequate for HSC members. So, this study was set up to investigate the deformable characteristics of HSC(700㎏/㎠) with high-yielding strength(7950㎏/㎠) transverse reinforcements. Effects of key variables such as the volumetric ratio of transverse reinforcement, the configurations of transverse reinforcements are studied in this research program.

콩트 : 여류 작가의 집

박관식 사회발전연구소 1996 한국인 Vol.15 No.8

Quality Characteristics of Chicken Emulsion Sausages with Different Levels of Makgeolli Lees Fiber

박관식,최윤상,김학연,김현욱,송동헌,황고은,최슬기,김천제 한국축산식품학회 2012 한국축산식품학회지 Vol.32 No.1

Makgeolli lees is a by-product of the makgeolli brew processing. Makgeolli lees contains high levels of fibers, which can be separated and used to develop foods rich in dietary fibers. The purpose of this study was to determine the effect of makgeolli fibers (0-4%) on proximate composition, caloric content, pH, color, cooking yield, textural profile, and sensory characteristics of chicken-emulsion sausages. The moisture content of 1, 2, and 3% makgeolli lees fiber-amended product was higher than the control, while that of the 4% product was not. Total calorie estimates of makgeolli lees fiber-amended sausages were lower than the control, except for in the case of the 4% treatment. Moreover, chicken sausages supplemented with makgeolli lees fiber had higher cooking yields and improved textural properties. Chicken emulsion sausages prepared with makgeolli lees fiber had improved overall acceptability, and the best results of sensory characteristics were obtained for the emulsion sausages containing 2% makgeolli lees fiber.

Performance Analysis of MUSIC-Based Jammer DOA Estimation Technique for a Misaligned Antenna Array

박관식,서지원 사단법인 항법시스템학회 2020 Journal of Positioning, Navigation, and Timing Vol.9 No.1

As a countermeasure against the threat of jamming which can disrupt operation of the Global Positioning System (GPS) receivers, various kinds of technique to estimate the Direction-Of-Arrivals (DOAs) of incoming jamming signals have been widely studied, and among them, the MUltiple SIgnal Classification (MUSIC) algorithm is known to provide very high resolution. However, since the previous studies regarding the MUSIC algorithm does not consider the orientation of each antenna element of antenna arrays, there is a possibility that DOA estimation performance degrades in the case of a misaligned antenna array whose antenna elements are not oriented along the same direction. As an effort to solve this problem, there exists a previous work which presents an MUSIC-based method for DOA estimation. However, the error between the real and measured values of each antenna orientation is not taken into consideration. Therefore, in this paper, the effect of the aforementioned error on the DOA estimation performance in the case of a misaligned antenna array is analyzed by simulations.

캡슐 내시경에서 발견되지 않은 궤양에 의한 소장 폐쇄와 캡슐 저류

박관식,김지현,류충헌,서효림,최윤정,하승인,이상헌,설상영 대한소화기내시경학회 2010 Clinical Endoscopy Vol.40 No.1

Capsule endoscopy (CE) is a valuable modality for directly examining the small bowel in a relatively noninvasive and safe manner. CE is being increasingly used for obscure gastrointestinal bleeding, Crohn’s disease, drug induced ulcer and small bowel tumor. Although capsule retention is a relatively infrequent complication, small bowel obstruction and strictures have been considered contraindications to CE. But some authors have reported that capsule endoscopy can be safely used to help identify the etiology and site of small bowel obstruction, and the retention of the capsule indicates the presence of a lesion requiring surgery. We report here on a case of small bowel obstruction and capsule retention by a small bowel ulcer, and the small bowel ulcer was not found when performing capsule endoscopy. 캡슐 내시경은 소장 질환 진단에 매우 중요한 검사법으로 비교적 간편하고 안전한 검사법이다. 캡슐 내시경은 원인 불명의 위장관 출혈, 소장 크론병, 약제 유발성 궤양, 소장 종양 등을 진단하기 위해 사용되고 있으며 점차 적응증이 확대되어 가고 있다. 캡슐 저류는 가장 중요한 부작용중의 하나이고 이러한 이유로 소장 폐쇄나 협착이 의심되는 경우 캡슐 내시경 검사의 금기로 알려져 있다. 그러나 최근 캡슐 내시경이 소장 폐쇄나 협착의 유발 인자와 폐쇄 부위 진단에 도움이 될 수 있고 캡슐 저류가 수술 절제가 필요한 병변의 존재와 확진을 가능하게 할 수도 있다는 보고가 있다. 이에 저자들은 소장 출혈이 의심되어 캡슐 내시경을 시행한 환자에서 폐쇄 병변은 발견되지 않았으나 캡슐 저류가 발생하여 폐쇄 병변의 존재를 간접적으로 알 수 있었고 수술 절제를 통해 궤양과 주위 유착으로 인한 소장 폐쇄가 발생한 1예를 경험하여 문헌 고찰과 함께 보고한다.

성장기 백서에 있어서 기능적 측방편위가 하악골의 성장에 미치는 영향

박관식 慶北大學校 齒科大學 1995 慶北齒大論文集 Vol.12 No.2

본 연구는 기능적 교합장애에 의한 하악골 측방편위가 하악골의 성장에 미치는 영향과 교합장애 제거후 나타나는 하악골의 성장양상을 알아 보기 위하여 생후 4주령의 웅성 백서에서 상악우측, 하악우좌 절치를 2주 및 4주간 절단한 실험군과 4주간 절치절단을 시행하고 2주간 절단을 중지한 실험군에서 하악골및 과두연골의 변화를 관찰하여 다음과 같은 결론을 얻었다. 1.실험 2주군에서 좌측의 하악골장경, 과두장경, 하악골고경, 과두단면적은 우측 및 정상군에 비해 작은 경향을 보였고 우측의 하악골장경, 과두단면적은 정상군에 비해 작았다. 2.실험 4주군에서는 좌측 과두단면적이 우측에 비해 작았으나 좌측하악골의 빠른 적응성 변화로 좌, 우측 하악골장경은 유사하였다. 그러나 정상군에 비해서는 하악골장경, 과두단면적이 여전히 작은 경향을 보였다. 3.절치절단 중지 후 2주 경과한 실험 6주군에서는 기능이 정상화됨에 따라 좌측과 우측이 동일한 성장을 보이나 정상군에 비해서는 여전히 하악골장경이 짧았다. 4.시상면에서 실험2주군의 좌측 과두연골은 우측및 정상군에 비해 연골층의 증식이 전반적으로 억제된 소견을 보이며 우측 또한 정상군에 비해 성장이 억제되었다. 그러나 실험 4주군, 6주군에서는 정상군과 유사한 소견이 관찰되었다. 5.하악과두연골층체적은 전 실험기간 동안에 실험군의 좌, 우측간, 그리고 실험군과 정상군의 동측간 비교시 유의성있는 차이를 관찰할 수 없었다. 이상에서 성장기 백서에 편측 절치절단을 시행한 경우, 시상면에서는 절단측의 하악골 및 과두의 성장이 억제되는 효과를 관찰할 수 있었으며 또한 빠른 시일내에 적응하여 좌, 우측 하악골은 유사한 성장변화를 일으킴을 알 수 있었다. 그러나 과두연골체적변화는 실험군 좌, 우측및 정상군에서 전 실험 기간동안에 유사한 양상이 관찰됨을 미루어 보아 전체적인 과두연골의 성장은 억제되지 않았음을 알 수 있었고 과두연골의 성장은 다방면으로 일어남을 인지할 수 있었다. This investigation examined the effect of lateral shift of mandible from functional occlusal interference on the growth of mandible and the growth pattern of mandible shown after the removal of occlusal interference. The followings were performed with the results below: the changes in mandible and condylar cartilage were studied in the experimental group with upper right, lower left incisors cut for 2 and 4 weeks an 4-week-old rats and the experimental group which had cut for 4 weeks and suspended for 2 weeks. 1. In the 2-week experimental group, the left mandibular length, condylar length, mandibular height and condylar area seemed smaller than those on the right and the normal group; the right mandibular length and condylar area were smaller than the normal group. 2. In the 4-week experimental group, left condylar area was smaller than the right, but due to the quick changes in adaptability of left mandible, right and left mandibular lengths were similar. compared with the normal group, however, mandibular length and condylar area still remained small. 3. In the 6-week experimental group, the left and the right appeared similar with the mandibular length remaining still shorter than the normal group. 4. In the sagittal plane, the proliferation of the cartilage layers of the left condylar cartilage of the 2-week group appeared to have general repression compared with the right and the normal group. The right side also showed repressed growth compared with the normal group. In the 4 and 6-week groups, however, it was similar to the normal group. 5. In condylar cartilage volume, no significant difference was noted in the comparisions of left and right of the experimental group, nor in the comparison of the same sides of experimental and normal groups. Based on the above, in case of contralateral incisal cutting in rats, it was observed that the growth of mandible and condyle of the cutting side was repressed; at the same time, the quick adaptabilityh led to similar changes of growth in left and right mandibles. But judging from the similar phenomena throughout the whole experimental period in the changes of condylar cartilage volume in the experimental, right and left, and normal groups, the general overall growth of condylar cartilage was found umrepressed. It was also recognized that the growth of condylar cartilage can take in various derections.

Structure and Mechanism of Surfactin Peptide from Bacillus velezensis Antagonistic to Fungi Plant Pathogens

박관식,남지영,김주은,송재경,김평일,민혜정,이철원 대한화학회 2019 Bulletin of the Korean Chemical Society Vol.40 No.7

Bacillus velezensis GH1-13 was recently isolated and showed to promote plant growth and strong antagonistic effects against phytopathogenic fungi including Gibberella moniliformis, Fusarium fujikuroi, Bipolaris oryzae, and Colletotrichum gloeosporioides. In this study, the antifungal substances produced by the GH1-13 strain were purified by ethyl acetate solvent partitioning and solid phase extraction using Sep-Pak C18 cartridge. The pure antifungal substances were finally purified by preparative reversed phase-high performance liquid chromatography. We investigated the structure of the purified antifungal compounds using liquid chromatography mass spectrometry and nuclear magnetic resonance spectroscopy. These compounds were identified as surfactin-type cyclic lipopeptides having an ELLVDLL amino acid sequence with different lengths of lipid chains. The surfactin lipopeptides effectively inhibited the growth of fungal mycelium, suggesting that the GH1-13 strain will be a potential biocontrol agent against plant pathogenic fungi.

브레딩시 밀 식이섬유 첨가가 돈육 등심 돈가스 품질특성에 미치는 영향

박관식,최윤상,김현욱,송동헌,이수연,최지훈,김천제,Park, Kwoan-Sik,Choi, Yun-Sang,Kim, Hyun-Wook,Song, Dong-Heon,Lee, Soo-Yeon,Choi, Ji-Hun,Kim, Cheon-Jei 한국축산식품학회 2012 한국축산식품학회지 Vol.32 No.4

본 연구는 밀 식이섬유(wheat fiber)를 첨가한 돈가스의 이화학적 및 관능적 특성에 미치는 영향을 조사하였다. 밀 식이섬유 첨가량이 증가함에 따라 돈가스의 수분함량, 회분함량, pH 및 명도는 증가하는 경향을 나타내었고, 반대로 지방함량, 칼로리, 적색도, 경도, 응집성, 검성 및 씹음성은 감소하였다. 돈가스의 단백질함량, 황색도, 탄력성 및 풍미는 대조구와 밀 식이섬유를 첨가한 처리구간에 유의적인 차이를 보이지 않았다. 관능적 특성의 전체적인 항목은 밀 식이섬유 첨가구가 높은 점수를 받는 것으로 나타났으며, 특히 3% 밀 식이섬유 첨가한 돈가스가 전체적인 기호도에서 가장 우수한 평가를 받았다. 또한, 밀 식이섬유를 첨가한 돈가스의 가열전 보관 시간은 2시간을 넘지 않는 것이 관능적으로 우수한 결과를 나타내었다. 따라서 밀 식이섬유를 첨가한 돈가스의 제조시 3%의 밀 식이섬유를 첨가할 시 돈가스의 품질이 보다 개선된 제품을 제조할 수 있을 것으로 보이며, 돈가스류 제품의 밀 식이섬유의 기능성 소재로의 활용성이 높다고 사료된다. The effects of the addition of wheat fiber on physico-chemical properties and sensory characteristics of pork loin cutlets were investigated to develop pork loin cutlets formulated with different concentrations of wheat fiber (0, 1, 2, 3, and 4%). The moisture content, ash content, pH, and lightness of pork loin cutlets increased with increasing wheat fiber levels (p<0.05). However, the fat content, calorie, redness, hardness, cohesiveness, gumminess, and chewiness decreased with increasing wheat fiber levels (p<0.05). The protein content, yellowness, and springiness of pork loin cutlets did not show significant difference (p>0.05). The sensory evaluation shows the greatest overall acceptability was ranked at the pork loin cutlets added with wheat fiber at 3%. Pork loin cutlets with added wheat fiber could be commercially acceptable meat products, and can be improved quality characteristics. The best results were obtained for pork loin cutlets with addition of 3% wheat fiber.

소리 내는 기내 가방

박관식 수필미학 2017 수필미학 Vol.15 No.-

T-S 퍼지 시스템의 상태 피드백 제어기와 결합된 출력 피드백 비례-적분 제어기의 설계

박관식,주영훈,박진배 대한전기학회 2012 대한전기학회 학술대회 논문집 Vol.2012 No.7