오약순기산(烏藥順氣散)이 고혈압과 동맥혈관에 미치는 영향

신형섭,고흥,김호현,Shin, Hyung-Sup,Ko, Heung,Kim, Ho-Hyun 한국한의학연구원 2004 한국한의학연구원논문집 Vol.10 No.2

Objectives : This experiments were performed to determine the effect of OYakSoonGi-San extract on hypertension in spontaneous hypertensive rat and norepinephrine-induced arterial contraction in rabbit. Methods : In order to define the effect of OYakSoonGi-San extract on contracted rabbit carotid arterial strips, transverse strips with intact or damaged endothelium were used for the experiment using organ bath. To analyze the mechanism of OYakSoonGi-San extract-induced relaxation, OYakSoonGi-San extract infused into contracted arterial strips induced by norepinephrine after treatment of indomethacin, $N{\omega}-nitro-L-arginine$, methylene blue or tetraethylammonium chloride. Results : Blood pressure was significantly decreased five days after administration of OYakSoonGi-San extract. The relaxation effect of OYakSoonGi-San extract was dependent on the presence of endothelium, showing that OYakSoonGi-San extract-induced relaxation was not observed in the strips without endothelium. Also OYakSoonGi-San extract-induced relaxation was significantly inhibited in arterial strips which were contracted by high $K^+$. OYakSoonGi-San extract-indeced relaxation was significantly inhibited by the pre-treatment of $N{\omega}-nitro-L-arginine$ or methylene blue, but it was not observed in the strips pre-treated with indomethacin or tetraethylammonium chloride. When additive application of $Ca^{2+}$ in arterial strips which were pre-contracted by norepinephrine in a $Ca^{2+}$-free solution, arterial contraction was increased. But contractile response to $Ca^{2+}$ was attenuated by pre-treatment of OYakSoonGi-San extract. Conclusions : These results demonstrated that OYakSoonGi-San could be applied effectively to hypertension and may inhibit agonist-induced contraction through an decrease influx of extra-cellular $Ca^{2+}$ by the formation of nitric oxide in the vascular endothelial cells.

스피넬 페라이트의 비이완 표면에너지 계산

신형섭,손정호,Shin, Hyung-Sup,Sohn, Jeongho 한국재료학회 2015 한국재료학회지 Vol.25 No.12

A new method is proposed for the calculation of the unrelaxed surface energy of spinel ferrite. The surface energy calculation consists of (1) setting the central and computational domains in the semi-infinite real lattice, having a specific surface, and having an infinite real lattice; (2) calculation of the lattice energies produced by the associated portion of each ion in the relative domain; and (3) dividing the difference between the semi-infinite lattice energy and the infinite lattice energy on the exposed surface area in the central domain. The surface energy was found to converge with a slight expansion of the domain in the real lattice. This method is superior to any other so far reported due to its simple concept and reduced computing burden. The unrelaxed surface energies of the (100), (110), and (111) of $ZnFe_2O_4$ and $Fe_3O_4$ were evaluated by using in the semi-infinite real lattices containing only one surface. For the normal spinel $ZnFe_2O_4$, the(100), which consisted of tetrahedral coordinated $Zn^{2+}$ was electrostatically the most stable surface. But, for the inverses pinel $Fe_3O_4$, the(111), which consisted of tetrahedral coordinated $Fe^{3+}$ and octahedral coordinated $Fe^{2+}$ was electrostatically the most stable surface.

육방정 페라이트의 결정과 Block 구조

신형섭,Shin, Hyung-Sup 한국세라믹학회 2012 한국세라믹학회지 Vol.49 No.3

It has been studied the crystal and block structures of the hexagonal ferrites with M, W, Y and Z types prepared by various coprecipitation-oxidation method. The structures have been refined with a Rietveld analysis of the powder X-ray diffraction pattern with high precision ($R_{WP}$ <0.09, $R_I$ <0.03). The density difference between the S-blocks was proportioned to the cobalt contents in hexagonal ferrites, but that between the R or T-blocks was relatively small. Compared with the blocks and cation-oxygen polyhedra in BaM ($BaFe_{12}O_{19}$), those were bulky to the normal direction for the c-axis in $Co_2W$ ($BaCo_2Fe_{16}O_{27}$) and to the parallel direction for the c-axis in $Co_2Y$ ($Ba_2Co_2Fe_{12}O_{22}$) and $Co_2Z$ ($Ba_3Co_2Fe_{24}O_{41}$). The S-blocks of $Co_2W$, $Co_2Y$, and $Co_2Z$ were unstable and distorted. Because the T-block of $Co_2Z$ was unstable, the T-block was decomposed into the Ba-rich phase and $Co_2W$ at high temperatures above $1200^{\circ}C$. A standard powder X-ray diffraction pattern for $Co_2Z$ was proposed as well.

호텔의 특성에 따른 아웃소싱의 인지효과에 관한 연구

신형섭(Hyung Sup Shin),강종천(Jong Chon Kang) 한국호텔관광학회 2004 호텔관광연구 Vol.5 No.3

호텔 아웃소싱의 知覺 屬性이 經營成果와 滿足度에 미치는 影響

신형섭(Shin, Hyung-Sup) 청운대학교 관광산업연구소 2011 관광산업연구 Vol.5 No.1

In this study, cognitive performance property of outsourcing hotel management performance and to identify and understand the relationships of factors affecting competitiveness of the hotel company and the future-oriented management strategy for the efficient utilization of outsourcing is proposed. The results of study are as follows: First, the impact of outsourcing on financial performance, quality of service is perceived property. In particular, service quality has a positive impact on financial performance for the growing outsourcing of hotel service quality is perceived to be important were analyzed. Second, the technology and the quality of the services affected. However, the technical and business skills that were analyzed in the negative affect. Ability to work to take advantage of the increase in the cost of the hotel, and that perception is analyzed. Third, the external and the ability to work and had an impact on the quality of service. Therefore, service quality and positive impact on the technology that has been analyzed that, for the increased cost of service quality perceptions in the hotel and that is analyzed. Fourth, External influence and perceived attributes of outsourcing is the mutual support and service quality. Impact of outsourcing a lot of satisfaction, perceived service quality attributes, business skills, is mutual support . Satisfaction with service quality and business skills can be seen that high impact.

호텔 이용객 선택행동속성에 관한 연구

신형섭(Hyung sup Shin) 한국외식경영학회 2001 외식경영연구 Vol.4 No.1

The purpose of this study is to clarify the choice item of hotel restaurant located in local. The representative variable includes "importance attributes" and "satisfaction attributes". Each consisted of 17 item It is thought that This study provides a hotel marketers with the infomations of a hotel sales & marketing. Of the total score(rating 5 score), all item are pointed the over 3. The chief results are summarized as the below ; First, the more visit in a hotel restaurant, the more satisfy with that. Second, visitor's satisfaction is depend upon weekends(saturday, Sunday) rather than the days except weekend. Third, visitor's satisfaction is also depend upon a hotel reputation. Fourth, the more a visitor is extrovert, the more a visitor feels satisfaction

호텔 연회상품의 마케팅 사례 연구

신형섭(Hyung sup Shin) 한국외식경영학회 2000 외식경영연구 Vol.3 No.2

The hotel industry in Korea is still thought to be in the tumultuous period directly affected by the IMF system. Amid severe competitions among the special grade second class hotels in Seoul area to induce banquets, there is a parameter which plays a huge role. This article compares and analyzes the banquet service among the hotels of the same grade to delve into the problems and, by thus, present the direction of the study. It is especially necessary to employ such policy by which various package events at economic price shall be planned during the dull season. In this case, technical sales shall be exercised in terms with the client's situation since, otherwise, hotel's image may be hurt by price dumping and lack of service due only to win the competition among the hotels of the same rank. You may loose credit and reliability from the clients if competition by dumping of price and lack of service tums out to be more than normal. This is why it is important to understand the significance of the banquet division in the hotel business and to get together to develop new banquet products in close assoaation with the hotels of the same grade.

주행가능거리 향상을 위한 태양광 자동차 언더 바디 최적설계

신형섭(Hyung Sup Shin),이승은(Seung Eun Lee),임홍재(Hong Jae Yim) 한국소음진동공학회 2017 한국소음진동공학회 학술대회논문집 Vol.2017 No.10

호텔관리자 리더십이 조직몰입과 조직시민행동에 미치는 영향

신형섭(Hyung Sup Shin),강종천(Jong Cheon Kang) 한국호텔외식관광경영학회 2007 호텔경영학연구 Vol.16 No.5

모바일에서 압축분할과 다중 클라우드 스토리지 저장을 통한 보안 향상기법 연구

신형섭 ( Hyung-sup Shin ),양민수 ( Min-su Yang ),송양의 ( Yang-eui Song ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.2

모바일 디바이스의 사용이 활발해지면서 사용자들은 PC에서 사용하는 서비스를 모바일 디바이스로 사용하려고 한다. 모바일 디바이스는 PC에 비해 자원이 한정적이며, 이러한 문제를 클라우드 서비스를 통해 해결하고 있다. 특히 모바일 디바이스의 제한된 저장 공간을 클라우드 스토리지를 이용함으로서 저장공간에 대한 제한성을 해결한다. 하지만 중앙 집중형태로 저장되는 클라우드 스토리지의 보안문제는 아직도 현재 진행형이며, 네트워크상에 다양한 공격 위협으로부터 노출되어 있다. 본 연구에서 모바일 디바이스에서 클라우드 스토리지로 데이터를 저장 할 때 보안을 향상시킬 방법을 제안하고 일반 전송서버와 시간을 비교하였으며 실험을 통해 안정된 성능을 입증하였다.