http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박예람,박훈영,김지수,황혜정,정양훈,Richard Kreider,임기원 한국운동영양학회 2019 Physical Activity and Nutrition (Phys Act Nutr) Vol.23 No.2
[Purpose] The composition of protein supplements, the consumption timing immedi¬ately before and after resistance exercise training (RET), and the quantity of protein supplementation may be important factors for the im-provement of muscle mass and function. Although these factors should be considered comprehensively for effective improvement of muscular function in protein supplementation, relatively few studies have focused on this area. Therefore, this study was designed to investigate whether a protein blend supplement before and after resistance exercise for 12 weeks would be effective in increasing muscular function. [Methods] In total, 18 participants were randomly assigned to a placebo (PLA) or protein blend supplement (PRO) group. All subjects followed the same training routine 3 times per week for 12 weeks, taking placebo or protein supplements immediately before and after each exercise session. The protein supplement consisted of 40 g of blend protein, including hydrolyzed whey protein. The RET consisted of lower body (barbell squat, dead lift, seated leg extension, and lying leg curl) and upper body (bench press, barbell rowing, preacher bench biceps curl, and dumbbell shoulder press) exercises. A repetition was defined as three sets of 10–12 times with 80% of one repetition maximum (1RM). [Results] Although the PRO group had a lower protein intake in terms of total food intake than the PLA group, the mean changes in muscle circumference, strength, and exercise volume increased, especially at week 12, compared to the PLA group. [Conclusion] These results suggest that the composition and timing of protein intake are more important than the total amount.
완전자율주행 택시 서비스의 사용자 경험을 높이는 디자인 가이드라인
박예람,김동환 한국멀티미디어학회 2023 멀티미디어학회논문지 Vol.26 No.4
The growing presence of autonomous driving solutions necessitates research on user experience. In Korea, autonomous driving services at level 3.5 or higher have been deployed and partially employed in limited public transportation area. This study examines user behavior and attitudes towards commercial autonomous taxi services, identifies their needs and challenges, and develops a prototype to address these concerns. By segmenting the user journey into phases such as before and after using taxi service, data on user requirements and difficulties are gathered through observation and interviewing. A service prototype is created to tackle identified issues and explore trust and perceived safety aspects in autonomous vehicle services using the Wizard-of-Oz method. Usability evaluation reveals enhanced trust and perceived safety of autonomous vehicles through increased information provision and screen visualization. The suggested service design principles are anticipated to contribute to a service that caters to user needs and challenges throughout the journey while promoting trust and perceived safety. As semi-autonomous taxi services transition to fully autonomous vehicle services, this study's guidelines can facilitate an improved user experience.
전라우수영 성곽 부재에 대한 암석학적 연구 및 산지추정
박상구,김성태,김준혁,김선향,백예람,김재환,좌용주 한국지구과학회 2018 韓國地球科學會誌 Vol.39 No.3
We investigated the petrological features of the stone materials used in the Jeolla Usuyeong rampart and estimated their provenance through the geological survey. The Jeolla Usuyeong was designated as a historic site (No. 535) on 2016. Since the remaining rampart is less than 15%, it is necessary to make conservation on it. In this study, we discriminated the stone materials used for the rampart according to their petrographic characteristics and estimated the volume proportion of each stone by the rock type. Also, we measured the whole-rock magnetic susceptibility. The petrographic features of the stones in the rampart were compared with those in the vicinity by their mineral composition and texture. The stone materials of the rampart mainly consist of the tuff, lapilli tuff, and lapilli stone. Among these three kinds of rocks, lapilli tuff is quantitatively the most abundant (60.3%), the next is tuff (34.7%), and lapilli stone (2.5%) shows the least amount. The whole-rock magnetic susceptibility of the tuffaceous rocks can be divided by the value of 1.0×10−3 SI unit. Also, the compressive strength of tuff exhibits about 156 MPa, which is adequate to reuse for the repairing work. Petrological comparisons between stone materials and outcrop rocks distributed around the Hwawon peninsula leads to a conclusion that the stone materials of the rampart are likely to have been delivered from the Dongoe- ri and Sindeok-ri. Judging from the results of the comparison on the frequency of use and physical properties among the tuffaceous rocks, tuff is considered to suitable for restoring the rampart. 전라남도 해남군 문내면 일대에 축성된 전라우수영 성곽의 부재를 대상으로 암석학적 연구를 수행하고 산지를 추정하여 보수정비를 위한 자료를 제공하고자 한다. 연구대상인 전라우수영은 2016년에 사적 제535호로 지정되었으며 성곽의 잔존구간은 약 15% 정도로 보존관리가 필요한 실정이다. 이번 연구에서는 성곽 부재에 대한 암석기재적 특징을 바탕으로 축성에 사용된 암석을 분류하고 사용비율을 산출하였으며 동시에 전암대자율을 측정하였다. 채취한 성곽 시료 의 현미경관찰로 광물 구성 및 조직 등을 파악하였으며 주변지역에 대한 지질조사를 통해 축성 재료의 가능성이 있는 주변암과 비교하였다. 연구 결과, 성곽 부재는 크게 응회암류와 기타 암석으로 구분할 수 있으나 대부분이 응회암류이 며 세부적으로는 응회암, 화산력 응회암, 화산력암이다. 부재로 사용된 비율을 살펴보면 화산력 응회암이 60.3%로 가장 많이 사용되었으며 이어서 응회암(34.7%), 화산력암(2.5%) 순이다. 전암대자율 측정 결과 응회암류는 1×10−3 SI unit 이 하의 낮은 값과 1-14×10−3 SI unit의 높은 값을 보이는 유형으로 구분할 수 있다. 주변암은 응회암이 우세하나 위치마 다 기재면에서 차이를 보이며 그 외의 응회암류는 화원면 신덕리 일대에 분포한다. 암석기재적인 특징과 전암대자율 값, 채석산지의 가능성을 고려하면 부재의 응회암은 문내면 동외리, 화산력 응회암은 화원면 신덕리 일대가 산지로 추정된 다. 추가로 축성 재료의 기준 설정을 위해 성곽의 주요 부재를 대상으로 물성시험을 수행하였으며, 압축강도 면에서 응 회암이 약 156 MPa의 양호한 값을 보였다. 물성시험 결과와 부재의 암종 별 사용량을 종합하면 성곽의 보수정비 시 대체석으로는 응회암이 적절할 것으로 판단된다.
Formulation of Calcium Phosphate Ceramic Particles for Bone Replacement
임예람,김정헌,박이안,조가은,서종휘,남지현,이우걸 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Recently, the growth of the elderly population increases the number of patients suffering from osteoporosis. Accordingly, it becomes an immediate need to develop bone grafts for bone replacement. Human bone is composed of 35% organic components, 45% inorganic components, and 20% moisture. Among them, the inorganic component accounts for a large proportion of calcium and phosphate as well as trace elements, such as magnesium, fluorine, sodium, and zinc. In this study, we synthesized phosphate-based inorganic ceramic particles with various chemical states for the use of bone substitutes. The chemical composition, size, surface charge, and degradation pattern are evaluated using SEM, FTIR, zeta potential, and EDX. Biocompatibility of these ceramic particles were examined via cell assays using osteoblastic MG63 cells.
Improvement of Osteoconductivity of Biodegradable PLCL Bone Cement
박진우,김정헌,박이안,임예람,홍재윤,이우걸 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Human bone-related disease, such as osteoporosis and arthritis, is continuously increasing problem in elderly population. This illness is caused due to the lack of calcium arising from demineralization of bone tissue and brings about serious deterioration of physical structure of bone. In this investigation, we synthesized PLCL(5:5) via copolymerization of lactide and caprolactone monomers. highly porous PLCL scaffolds combined with ceramic particles were fabricated to use as bone cement possessing improved physical and biological properties. Various properties including mechanical strength, chemical state, hydrophilicity, and water uptake were examined using SEM, EDX, and FT-IR. The biological property of the scaffold was evaluated with regard to proliferation of osteoblastic sarcoma cells. Results demonstrate that both mechanical and biological functionality were significantly improved, suggesting the developed scaffold can be potentially applied for the preparation of bone grafts.
Chitosan Scaffold Supported by Collagen Incorporation for the Improvement of Bioactivity
김정헌,김민정,박은현,송민주,이민선,이병학,임예람,오지영,이우걸 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
In tissue engineering, 3D porous scaffold is essential for the regeneration of damaged tissue. To do so, materials used to prepare the scaffold need to satify prerequisites including biocompatibility, biodegradability, porosity, hydrophilicity, so that the scaffold can promote cell adhesion, proliferation, and differentiation. In this study, we performed feasibility study whether the bioactivity of chitosan (CHN) scaffold can be supported by collagen (COL) incorporation. COL incorporation into CHN scaffold was made at various COL concentrations and the mechanical properties of the scaffold were thoroughly examined. The porosity and degradation behavior of CHN/COL scaffold were analyzed. The bioactivity of the scaffold was evaluated using fibroblast and found that fibroblast proliferation and differentiation were improved.
Characterization of Physicochemical Properties of COL/CHN Complex
김정헌,김민정,박은현,송민주,이민선,이병학,임예람,오지영,이우걸 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Chitosan (CHN) is a natural polymer derived by deacetylation of chitin which is external skeletal compound of crustaceans. CHN is reported to be highly positively charged, biocompabitible and biodegradable. Therefore, CHN is widely used for medical applications including artificial replacement of skin, cartilage, and bone tissues. In addition, collagen (COL) is a major protein constituting human body. COL possess RGD seqeuence which interacts with integrin embedded in cellar membrane and stimulates cell adhesion and differentiation. In this study, we prepared CHN/COL complex film and examined the effect of the complexation on the surface properties of the CHN/ COL-complexed film on the chemical state, morphology, and hydrophilicity using FT-IR, SEM, and goniometer.