흡착제를 이용한 참기름의 벤조피렌 저감화

최승관(Seung Kwan Choi),최수빈(Su Bin Choe),강성태(Sung Tae Kang) 한국식품영양과학회 2014 한국식품영양과학회지 Vol.43 No.4

Benzo(a)pyrene 함량이 4.1 ppb가 되도록 첨가한 참기름에 흡착제인 활성탄을 첨가하였을 때 첨가량, 교반시간, 교반온도가 증가함에 따라 benzo(a)pyrene 함량이 줄어들었다. 참기름에 활성탄을 0.5%(w/w) 투입하고, 30분간 70°C에서 교반하였을 때 볶은 참기름에 존재하고 있는 benzo(a)pyrene의 함량은 0.91 ppb까지 낮아져 식품공전규격인 2.0 ppb 이하의 적합 수준의 참기름을 얻을 수 있었다. 경기권 재래시장에서 판매되고 있는 재래식 압착 참기름 30건의 benzo(a)pyrene의 함량은 0.19 ppb부터 4.11 ppb로 나타났다. 경기권 재래시장에서 구입한 참기름 중 benzo(a)pyrene 함량이 가장 높은 3가지 시료(2.14~4.11 ppb)를 위와 같은 최적의 흡착조건으로 처리하였을 때 benzo(a)pyrene의 함량은 0.43~0.86 ppb로 매우 효과적으로 감소하였다. 본 연구는 활성탄 첨가 후 교반처리만으로 볶음공정을 반드시 거치는 참기름에서 규격 이상의 벤조피렌이 검출되는 것을 저감화 하는 방법을 제시함으로써 참기름이 안전하게 생산, 유통될 수 있는 데에 응용할 수 있을 것으로 생각된다. This study was conducted to reduce benzo(a)pyrene in sesame oil by addition of several kinds of absorbents (active carbon, diatomaceous earth, kaolin, acid clay, perlite, and silicate). Sesame oil containing 4.1 ppb benzo(a)pyrene was stirred with 0.2% (w/w) several kinds of adsorbents at 40°C for 30 min. Active carbon resulted in the highest reduction of benzo(a)pyrene in sesame oil among the investigated adsorbents, and decolorization was observed only by using silicate. Reduction of benzo(a)pyrene was optimized by controlling amount the of active carbon, stirring time, and stirring temperature. Futher, 4.1 ppb benzo(a)pyrene in sesame oil was reduced by up to 0.91 ppb by adding 0.5% (w/w) active carbon and stirring for 30 min at 70°C. Optimized conditions were applied to sesame oil (2.14~4.11 ppb) purchased from a Gyeonggi traditional market, and benzo(a)pyrene in sesame oil was reduced by up 0.43~0.86 ppb.

3차원 공간 상에서 Space Syntax를 이용한 게임 객체 배치 연구

최승관(Choi, Seung-Kwan),김동현(Kim, Dong-Hyun),김영욱(Kim, Young-Ook) 한국게임학회 2012 한국게임학회 논문지 Vol.12 No.5

본 논문에서는 게임 맵에 대한 공간 분석을 통하여 정량적인 공간 분석 수치를 제공함으로써기획자들로 하여금 게임 객체를 배치하는데 있어서의 합리성을 제공할 수 있도록 하는 것이 본 연구의 기본 목적이다. 본 연구의 의의로는 Space Syntax을 이용한 게임 플레이어들의 행태 분석에 국한된 기존 연구의 한계를 벗어나, 게임 개발 단계인 레벨 디자인에서 Space Syntax를 활용하여 효율적인 게임 객체의 배치가 가능할 수 있도록 한 것이다. 본 논문의 산업적인 가치로는 합리적인 게임 객체의 배치에 따라 기존의 레벨 디자인 단계에서 발생할 수 있는 반복적인 작업들을 줄여 게임 개발 기간 및 개발 기대 비용을 절감할 수 있을 것으로 기대한다. The purpose of this research is to provide the rationality of placement of game objects using the space analysis for game map so that the game designers can find out the proper position for each object in the map. The significance of this research is beyond the limitations of the existing research using Space Syntax theory is confined to the analysis of the behavior of players in the map, this research suggest the method of the efficient placement of game objects in level design step. This paper as the worth of the industry is expected to be able to reduce the repetitive tasks that may occur during game level design steps. Through this, it is also expected by reducing game development period and development costs in accordance with the reasonable placement of game objects.

CARE(CAse REport) 지침에 의거한 척추신경추나의학회지 증례보고의 질 평가 연구 : 2013년 이후 증례보고를 중심으로

최승관(Seung-Kwan Choi),오경진(Kyeong-Jin Oh),이정한(Jung-Han Lee) 척추신경추나의학회 2021 척추신경추나의학회지 Vol.16 No.1

Objectives A case report is a detailed medical description of previously unreported observations or complications of medical conditions, unique use cases of tests, or new side effects. The purpose of this study was to evaluate the quality of case reports published in the Journal of Korea CHUNA Manual Medicine for Spine & Nerves (JKCMSN). Methods Case reports published in the JKCMSN from January 2013 to December 2020 were selected using the Oriental Medicine Advanced Searching Integrated System (OASIS). The quality of the reports was assessed based on the Consensusbased Clinical Case Reporting Guideline Development (CARE) guidelines. Results Sixty case reports that met the inclusion criteria were included in the assessment. Our analysis revealed that 71.42% of the case reports included all the necessary information and their level of reporting was good. However, their scores in the qualitative subdivisions of the reporting level parameters showed that the quality level was uneven. More than 65% of the papers did not report in the following categories: “Keywords,” “Patient information,” “Timeline,” “Diagnostic assessment,” “Therapeutic interventions,” “Follow-up and outcomes,” “Patient perspective,” and “Informed consent.” Conclusions Our analysis shows that CARE guidelines need to be followed more rigorously to improve the quality of reporting in the JKCMSN. Further efforts are necessary to develop reporting guidelines and evaluation tools relevant to the Korean clinical context.

TSC 합성보의 화재시 거동 및 전열특성에 관한 실험적 연구

최승관(Choi Seng-Kwan),김성배(Kim Sung-Bae) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.1

TSC composite beam is a type of innovative composite structures, composed of a concrete beam enclosed by steel plates in its three sides. The study of composite structures in fire is generally focused to investigate the structural performance in relation to the effect of strength and stiffness reduction of steel section, at which a tensile block forms in its flexural mechanism. This research also aims to experimentally assess the in-fire performance of the TSC composite beam with respect to various structural aspects such as load ratio, additional reinforcements, insulation.

비대칭 H형강을 사용한 슬림플로어 보의 내화성능에 관한 연구

한상훈,최승관,김희주,Han, Sang Hoon,Choi, Seng Kwan,Kim, Hee Ju 한국강구조학회 2007 韓國鋼構造學會 論文集 Vol.19 No.4

본 연구는 비대칭 H형강을 사용한 슬림플로어 보의 화재시 구조성능에 관한 실험 및 해석적 연구로서, 화재시 본 합성부재의 구조거동을 파악하여 합리적 내화설계의 자료를 얻는 것이 목적이다. 화재실험으로 계획된 여러 변수의 시험체를 제작하고 상온과 고온에서 휨실험을 수행하여 시간에 따른 온도분포, 하중-처짐 관계를 분석하였다. 해석적 방법은 설계된 단면에 대하여 완전 합성을 가정으로, 열전도 해석으로 온도분포를 구하고 재료의 잔존강도를 분할된 메쉬에 입력하여 휨강도를 예측하였다. 웨브의 두께와 깊이를 변수로 하여 슬림플로어 보의 화재시 휨내력을 고찰하였다. This paper is a pilot study regarding an experimental and parametric study to investigate the structural behavior of slimfloor beam(ASB) in fire. The objective of this research is to obtain the rational fire resistance design method through understanding the structural behavior of composite members in fire. The flexural capacity of slimfloor section under various thermal conditions is examined on a basis of the strength retention of the materials at elevated temperatures and full bonding assumption. The effect of web thickness and ASB depth to the moment capacity in fire is also examined.

TSC 합성보의 내화성능에 관한 연구

김성배,최승관,이창남,김상섭,Kim, Sung Bae,Choi, Seng Kwan,Lee, Chang Nam,Kim, Sang Sup 한국강구조학회 2006 韓國鋼構造學會 論文集 Vol.18 No.1

복합 구조 시스템은 강재와 콘크리트의 합성으로 내화성능이 우수할 것으로 판단된다. 그러나 복합구조의 내화성능에 대한 연구는 아직 초기 단계로 기둥과 보 등의 부재에 대한 내화실험 결과가 일부 발표 되었으나 합성보에 대한 자료는 거의 없다. 이에 본 연구에서는 TSC 합성보의 내화성능 평가를 위해 내화실험과 수학적 및 수치 해석적인 방법을 통해 평가하였다. 내화실험은 형상의 종류와 가력 하중, 내화피복재 보강방법 등을 변수로 실험을 실시하였다. 또한 수치 해석 중 강재와 콘크리트의 재료특성은 Eurocode에 준하였으며 온도의 변화는 열전도 FE 해석과 수학적인 방법을 사용하였다. The purpose of this paper is to evaluate the fire resistance of the TSC beam, a composite beam composed of a concrete beam enclosed by steel plates. Since a discrepancy was observed between the structural mechanisms of TSC and typical composite beams, the fire performances of the two beams are likewise believed to be partially dissimilar. In this experiment, small and medium-sized TSC beams were tested under given conditions in the laboratory, with/without one of the most widely used spray-on fire protections in Korea. Furthermore, based on the steel and concrete properties under elevated temperatures that were obtained from Eurocode, temperature development across the section was suggested, analyses. To determine the capacity of a modified plastic section, th e fire performance of the model was also examined.

Temperature on structural steelworks insulated by inorganic intumescent coating

J. Yoon Choi,최승관 국제구조공학회 2013 Steel and Composite Structures, An International J Vol.15 No.1

Predicting the fire resistance of structures has been significantly advanced by full scale fire tests in conjunction with improved understanding of compartmental fire. Despite the progress, application of insulation is still required to parts of structural steelwork to achieve over 60 minutes of fire rating. It is now recognised that uncertainties on insulation properties hinder adaptation of performance based designs for different types of structures. Intumescent coating has recently appeared to be one of most popular insulation types for steel structures, but its design method remains to be confirmed by empirical data, as technical difficulties on the determination of the material properties at elevated temperatures exist. These need to take into account of further physiochemical transitions such as moving boundary and endothermic reaction. The impetus for this research is to investigate the applicability of the conventional differential equation solution which examines the temperature rise on coated steel members by an inorganic intumescent coating, provided that the temperature.dependent thermal/mechanical insulation properties are experimentally defined in lab scale tests.

괄사요법의 국내외 최신 임상 연구 동향: 주제범위 문헌고찰

정승원 ( Seungwon Jung ),최승관 ( Seungkwan Choi ),조정호 ( Jungho Jo ),한윤희 ( Yunhee Han ),우현준 ( Hyeonjun Woo ),전병현 ( Byeonghyeon Jeon ),하원배 ( Wonbae Ha ),이정한 ( Junghan Lee ) 한방재활의학과학회 2024 한방재활의학과학회지 Vol.34 No.1

Objectives This study examined recent domestic and international clinical research trends in Gua sha therapy to suggest future direction for research. Methods We used six domestic and international databases (Research Information Sharing Service, Korean studies Information Service System, Oriental Medicine Advanced Searching Integrated System, PubMed, Embase, Cochrane Library) to select clinical studies with an original text in English or Korean published after 2018. Results Finally, 55 studies were selected. Randomized controlled trials accounted for the largest amount with 42 studies. Instrument assisted soft tissue mobilization was the most frequent term referring to Gua sha. Muscle shortening, limited range of motion, and plantar fasciitis were the most common symptoms, with six cases each. Additionally, there were two studies targeting symptoms other than the musculoskeletal system. Conclusions Additional research is needed on the effects of Gua sha therapy on the back of the lower extremities and hip joints, and research is needed on the possibility of their clinical use for diseases or symptoms other than those of the musculoskeletal system. And standards for the terminology of Gua sha and the types and methods of applied interventions are needed. (J Korean Med Rehabil 2024;34(1):23-38)

호서대 3D 캐릭터 애니메이션 제작

김경식(Kyung-Sik Kim),최승관(Seung-Kwan Choi),박승호(Seung-Ho Park),강현구(Hyun-Ku Kang),김대현(Dae-Hyun Kim),나성남(Seong-Nam Na) 한국멀티미디어학회 2000 한국멀티미디어학회 학술발표논문집 Vol.2000 No.1

게임문화의 거리 조성방안 연구

김동균,김동현,이주영,유여정,최승관,Kim Dong-Kyun,Kim Dong-Hyun,Lee Ju-Young,Yu Yeo-Jung,Choi Sung-Kuan 한국콘텐츠학회 2006 게임&엔터테인먼트논문지 Vol.2 No.3

As the quality of life increases, the demand for enjoyment of leisure culture is increasing in modem society. This has led to the growth of cultural industries, creating many new cultural industries, and due to its recent engagement with digital technology, the development of digital cultural contents has rapidly expanded. As an integrated art field grafted with high technology, the game industry in particular is fusible with other various fields to create new leisure cultures. Taking these periodic conditions into consideration, this essay has presented a promotion scheme for game culture street based on the characteristics of game culture that make it easy for anyone to access. Game culture material signifies the grafting of cultural game characteristics to the physical platform of street, to provide, not only diverse applications of game culture, but also a market for vitalized game industries. This essay has researched the validity and components of game culture material promotion, along with promotion schemes for physical street. 현대 사회는 삶의 질이 높아짐에 따라 여가문화를 향유하고자 하는 요구가 증대되고 있다. 이는 문화산업의 발전으로 이어져 다양한 문화산업을 창출하고 있으며, 최근에는 디지털 기술의 발전과 맞물리면서 디지털 문화콘텐츠의 발전이 비약적으로 확대되고 있다. 특히 게임 산업은 첨단 기술과 접목된 종합예술분야로 다양한 부문과의 융합이 가능해 새로운 여가문화를 창출하고 있다. 본 논문에서는 이러한 시대적 상황을 고려하여 누구나 쉽게 접근한 수 있는 게임문화의 특징을 기반으로 하는 게임문화의 거리 조성방안을 제시하였다. 게임문화의 거리란 게임이 갖고 있는 문화적 특성을 물리적 플랫폼인 거리에 접목함으로서 게임문화의 다양한 활용은 물론 게임산업의 활성화를 위한 장을 마련하고자 하는 것이다. 본 논문에서는 게임문화의 거리 조성에 관한 타당성과 구성요소 및 물리적 거리 조성방안에 초점을 맞춰 연구하였다.