호텔입지에 따른 중저가호텔의 선택속성에 관한 비교연구

권희석(Hee Seok Kwon),지윤호(Yun Ho Ji),변정우(Jeoung Woo Byun) 한국호텔외식관광경영학회 2013 호텔경영학연구 Vol.22 No.6

This study is supposed to demonstrate the importance and difference of significant selection attributes of Budget Tourist Hotels by their locations, and suggests marketing strategies and business methods that lead to customer satisfaction. For this purpose enhanced advances research of Budget tourist Hotels` concept, features and customer selective characteristics, Budget tourist Hotels current state and condition were empirically studied. Secondly, understanding of positioning and commercial supremacy and verifying the role of important variances through the substitution of selective attribution in an empirical study. Lastly investigation the relation of Selective attribution and customer satisfaction. First, comparing the selective attribution of each Hotel position, the primary trade area accessibility was a highly considered factor. Thus humane service in the tertiary trade area, Hotel Facilities in the secondary trade area and Price in the secondary trade area, Hotel reputation in the tertiary trade area was the high considered factor. Secondly comparing the selective attribution and satisfaction the primary trade area its accessibility and reputation has a relation to its customer satisfaction, secondary trade area the accessibility, reputation, humane service was considered important. Lastly in the tertiary trade area humane service, reputation and price have the impact on guest satisfaction. After the position of the hotel is settled, each and every unique business strategy is requested. The positioning factors of city Hotel, closer to the city`s one must appeal its strength in accessibility and further to the city hub one must strengthen its service uniqueness and gain superiority of pricing competiveness. Also Budget tourist Hotels must keep importance in customer management as per location in order to construct Brand image or reputation for potential future guests.

미국의 국가 우주기상 대응 전략 및 실천계획

권희석(Kwon, Hee Seok),이진호(Lee, Jin Ho),이은정(Lee, Eun Jung) 한국항공우주연구원 2016 항공우주산업기술동향 Vol.14 No.1

우주시스템은 우주에서 발생되는 여러 상황에 취약하다. 우주시스템에 대한 의존도가 점차 높아지면서 우주폐기물, 지구근접물체(NEO), 우주기상과 관련한 우주상황인지(SSA) 활동에 대한 중요성 또한 높아졌다. 미국 정부는 2015년 10월 우주기상상황과 이로 인한 핵심기반시설에 미치는 영향을 보다 잘 이해하고 국가적 대비태세를 보다 잘 갖추기 위한 노력의 일환으로 국가우주기상전략과 국가우주기상실천계획을 발표했다. 이 논문에서는 미국의 우주기상전략과 시사점에 대해 살펴본다. As our daily life is increasingly dependent upon space systems, which are very vulnerable to a variety of situation occurring in space, it has become more important to provide Space Situational Awareness (SSA) involving space debris, near-Earth objects (NEOs), and space weather. In October 2015, the U.S. Government released the National Space Weather Strategy and National Space Weather Action Plan to enhance better understanding and national preparedness for space weather events and any impacts thereby upon critical infrastructure. This paper will examine the U.S. space weather strategy and explore the implications.

호텔기업의 윤리경영과 경영성과 간의 구조적 관계에 관한 연구

권희석(Kwon, Hee-Seok),변정우(Byun, Jeong-Woo) 한국관광레저학회 2014 관광레저연구 Vol.26 No.6

미국 수출통제 제도 개관

권희석(Kwon, Hee-Seok),이준(Lee, Joon),이은정(Lee, Eun-jeong) 한국항공우주연구원 2015 항공우주산업기술동향 Vol.13 No.1

The Export Control Reform (ECR) initiative, which was launched by President Obama in 2009, is designed to better protect sensitive defense technology, while reducing overly restrictive regulations on less sensitive items. As part of the ECR efforts. some spacecraft systems and equipment have reverted back to the jurisdiction of Commerce Department from State Department. This paper will overview the export control system in general and both regulations of the ITAR and EAR and then further review the ECR process and its impacts upon the trade controls on spacecraft systems, equipment, parts, and the like, which will help us move forward to strengthen national security and the competitiveness of our industry.

Enhancement of Anti-inflammatory Activities of Scutellaria baicalensis Alkaline Reduced Water Extracts

Woo Seok Choi(최우석),Ji Seon Kim(김지선),최운용,최철순,Hee-Souk Kwon(권희석),Hye Won Lim(임혜원),Ra Hwan No(노라환),Hyeon Yong Lee(이현용) 한국약용작물학회 2013 한국약용작물학회 학술대회논문집 Vol.2013 No.2

Lactobacillus rhamnosus 파쇄물의 항산화 및 미백효과

최우석 ( Woo Seok Choi ),권희석 ( Hee Souk Kwon ),임혜원 ( Hye Won Lim ),노라환 ( Ra Whan No ),이현용 ( Hyeon Yong Lee ) 한국미생물생명공학회(구 한국산업미생물학회) 2013 한국미생물·생명공학회지 Vol.41 No.2

유산균은 국내외 연구진들에 의하여 피부장벽을 강화하는 효능 및 미백, 보습효과가 뛰어나다는 연구 결과가 보고된바 있다[5, 26]. Lactic acid인 Lactobacillus rhamnosus는 보편적으로 많이 사용하는 프로바이오틱스인 Lactobacillus casei보다 낮게 측정되는 세포독성 결과와 높은 tyrosinase 억제활성을 바탕으로 멜라닌 생성을 줄임에 따라 미백활성을 가진다. 또한 Lactobacillus rhamnosus 파쇄물은 melanoma cell의 멜라닌 생성 저해능이 Lactobacillus casei보다 월등히 높아, 높은 미백 향장 활성을 가지는 것을 확인 할 수 있다(Table 2). 이는 곧 천연물질로써 기존에 사용하던 합성미 백제보다 피부에 독성을 주지 않고, 부작용 없이 피부에 적합한 향장소재로 판단되며, 현대의 새로운 미백향장소재로서 활용가능성이 매우 높을 것으로 사료된다. 더 나아가 항산화 활성은 멜라닌 세포 형성 억제에 직접적으로 영향을 주며, 주름 및 노화 등의 출발점이 되어, 미백 활성도 증가됨을 확인할 수 있다. 따라서, 기능성 향장소재로써 가치가 높은 Lactobacillus rhamnosus는 합성물질 및 기타 천연물을 대체할 수 있는 항산화 및 미백 기능성 향장소재로 다가갈 수 있으며, 향장소재로써 선택의 폭을 늘릴 수 있을 것으로 사료된다. This study was performed to investigate the whitening effects of Lactobacillus rhamnosus in addition to its antioxidative activities. The cytotoxicity of the Lactobacillus rhamnosus was 7.6% at 10.0% (v/v) concentration. Its cytotoxicity was lower than 3.2% of Lactobacillus casei when adding the same concentration. Lactobacillus rhamnosus exhibited high antioxidative activities at 14.9% of DPPH radical scavenging activity, and a lower reducing power was measured. Lactobacillus casei exhibited relatively lower antioxidative activities at 13.4%. The tyrosinase inhibition activity of Lactobacillus rhamnosus was observed at 31.3% when adding 10.0% (v/v), as compared to 17.7% for Lactobacillus casei. Lactobacillus rhamnosus demonstrated strong inhibition activity for melanin synthesis at 58.6% when adding 10.0% (v/v), while Lactobacillus casei increased to 80.6%. It was also observed that the high antioxidative activities of Lactobacillus rhamnosus were strongly correlated to whitening activities, due to the inhibition of both tyrosinase and melanin synthesis. These results support the expanded use of lactic acid bacteria as a functional bioresources in the cosmetics industry.

유산균 발효를 통한 황금 추출물의 항염증 효과 증진

최우석 ( Woo Seok Choi ),권희석 ( Hee-souk Kwon ),노라환 ( Ra Hwan No ),최근표 ( Geun Pyo Choi ),이현용 ( Hyeon Yong Lee ) 대한화장품학회 2013 대한화장품학회지 Vol.39 No.4

본 연구에서는 소염, 항염 작용이 뛰어난 작물로 알려진 황금을 유산균인 Lactobacillus rhamnosus를 이용해 발효를 통한 황금의 추출물에 대한 추출공정별 항염증 효과 증진을 측정하였다. 추출 공정으로는 일반 열수추출(WE), 일반 70% 에탄올 추출(EE), L. rhamnosus 발효 열수 추출(FWE), L. rhamnosus 발효 70% 에탄올 추출(FEE)로 나누어 진행하였다. 각각의 추출 공정별 수율 측정결과 발효 70% 에탄올 추출이 25.9%로 최대 수율을 얻었으며, 발효 열수 추출, 일반 70% 에탄올 추출, 일반 열수 추출 순으로 높은 수율을 얻었다. 추출 공정별 세포독성 측정에서 발효 황금 에탄올 추출물의 농도가 1.0 mg/mL일때 9.8%로 가장 낮은 세포독성을 나타냈으며, 일반 에탄올 추출의 경우 22.6%로 가장 높은 세포 독성을 가졌다. Hyaluronidase 저해 효과는 발효 황금 에탄올 추출물의 농도가 1.0 mg/mL에서 최대 46.8%의 hyaluronidase 저해 활성을 보였으며, NO 생성량 및 PGE₂ 생성량 측정도 1.0 mg/mL 농도의 발효 황금 에탄올 추출물이 각각 36%의 최대 NO 생성량 감소 및 810 pg/mL의 낮은 PGE₂ 값을 나타냈다. 따라서 황금의 항염증 관련 효과를 위한 최적 추출 공정으로는 발효를 통한 황금의 70% 에탄올 추출 수율이 가장 높았으며, 이에 따라 항염증 관련 생리활성 물질이 보다 더 많이 용출됨을 확인할 수 있다. This study was performed to investigate the anti-inflammatory activities of fermented Scutellaria baicalensis extracts using Lactobacillus rhamnosus. The extracts were WE (water extract at 100 ℃ for 24 h), EE (70% ethanol extract at 60 ℃ for 24 h), FWE (fermented and water extract at 60 ℃ for 24 h), FEE (fermented and 70% ethanol extract at 60 ℃ for 24 h). The cytotoxicity of the extracts was in the range of 11.2 ∼ 15.6 % at 1.0 mg/mL concentratioin. The FEE showed the lowest activity at 1.0 mg/mL concentratioin. Compared to the WE, hyaluronidase inhibitory activity contents in the FEE increased to 9.2% at 1.0 mg/mL concentratioin. Nitric oxide production of WE, EE, FWE and FEE at 1.0 mg/mL concentration was mesured as 7.6, 7.9, 6.9, 6.4 μM, respectively. PGE₂ secretion of the human fibroblast of the FEE were lower than 810 pg/mL. Our results suggested that the extracts from fermentation process after 70% ethanol extraction had relatively high anti-inflammatory activities and that the Scutellaria baicalensis could be more extracted in FEE than others.

항균 효능이 있는 비타민 B1 유도체(Thiamine Dilauryl Sulfate:TDS)의 나노 입자화를 통한 기능성 향장 활성 증진

서용창 ( Yong Chang Seo ),노라환 ( Ra Hwan No ),권희석 ( Hee-seok Kwon ),이현용 ( Hyeon Yong Lee ) 대한화장품학회 2013 대한화장품학회지 Vol.39 No.3

본 연구는 레시틴으로 나노입자화 시킨 티아민 디라우릴 설페이트의 향장활성 증진에 관한 것이다. TDS를 포집시킨 나노입자는 150 ~ 200 nm의 크기를 나타내는 구형이며, 또한 제타포텐셜을 측정하여 여러 pH 범위에서 안정한 것을 확인하였다. TDS 나노입자는 인간 섬유아세포(CCD-986sk)에 높은 농도를 처리하여도 85%의 세포생존률을 보였다. 자유라디칼소거활성 실험을 진행한 결과 나노입자화하지 않은 TDS 희석액(1.0 mg/mL)은 81.6%의 활성을 나타내었고, 나노입자화한 TDS 용액은 이보다 더 높은 88.1%의 높은 라디칼 소거활성을 보였다. TDS 나노입자는 자외선을 조사시킨 CCD-986sk에서 MMP-1의 발현을 41.4% 감소시켰다. TDS 용액과 TDS 나노입자를 가지고 salmonella typhimurium, listeria monocytogenes에 대하여 항균활성을 측정하였다. TDS 나노입자의 경우 양성대조군의 항균활성과 비슷한 결과를 나타내었다. 이러한 결과들로 TDS 나노입자가 항산화, 미백, 주름개선 효능같은 향장 소재로서의 적용이 가능할 것이라 생각된다. This study was to improve cosmetical activity of thiamine di-lauryl sulfate (TDS) by encapsulation of nanoparticle with lecithin. Results showed that most of the nanoparticles containing the TDS were well formed in round shape with below 150 ∼ 200 nm diameter as well as they were fairly stable in various pH ranges by measuring zeta potentials. The nanoparticles of TDS resulted in 85% cell viability of human normal fibroblast cells (CCD-986sk) when added at the highest concentration (1.0 mg/mL). The nanoparticles of Acer mono sap showed highest free radical scavengering effect as 88.1% in adding sample (1.0 mg/mL), compared to TDS solution of non-encapsulation (81.6%). The nanoparticles of TDS reduced the expression of MMP-1 on UV-irradiated CCD-986sk cells down to as 41.4%. The TDS solution and nanoparticles showed significant anti-microbial activities agaionst the salmonella typhimurium and listeria monocytogenes at 5 and 6 days as compared with control. Anti-microbial activities of TDS nanoparticles were similar to positive control. These results indicated that TDS nanoparticles may be a source for functional cosmetic agents capable of improving cosmetical activity such as antioxidant, whitening, and anti-wrinkling effects and can be further developed as natural preservative in cosmetics.