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가변 데이터 입력 간격을 지원하는 파이프라인 구조의 합성
전홍신,황선영 대한전자공학회 1994 전자공학회논문지-A Vol.31 No.6
Through high level synthesis, designers can obtain the precious information on the area and speed trade-offs as well as synthesized datapaths from behavioral design descriptions. While previous researches were concentrated on the synthesis of pipelined, datapaths with fixed DII (Data Initiation Interval) by inserting delay elements where needed, we propose a novel methodology of synthesizing pipeline structures with variable DIIs. Determining the time-overlapping of pipeline stages with variable DIIs, the proosed algorithm performs scheduling and module allocation using the time-overlapping information. Experimental results show that significant improvement can be achieved both in speed and in area.
전홍신 경희대학교 환경연구소 1995 環境硏究 論文集 Vol.6 No.-
The study on the prediction of the spray flow in confined jets has been carried out numerically in this paper. The purpose of in this paper is to investigate the spray behaviors in confined jets. Numerical method is based on one-way coupling because loading is 4.5% - 8.5% and the evaporation of spray droplets can be ignored in this study. the algorithm to solve gas flow effects on spray droplet dispersion is basically the same as that of Gosman and Ioannides. Conclusions are as follows 1) The spray trajectories in confined jets is effected greatly by the droplet size and flow pattern 2) Interaction time of small droplets and flow is eddy life time, small droplets are effected greatly by turbulence, but large droplets are little effected by it. 3) Trajectories of large droplets are mainly depend upon initial condition.
$Moir\acute{e}$ Fringe에 의한 액막 두께 미소 변위 측정 연구
전홍신,김경훈,Jeon, H.S.,Kim, K.H. 한국액체미립화학회 1997 한국액체미립화학회지 Vol.2 No.4
Liquid film thickness is measured by $moir\acute{e}$ topography which monitored liquid surface. $Moir\acute{e}$ fringe measurement techniques share the inherent simplicity found in optical interferometric techniques have the advantage of use over a greater range of displacement. $Moir\acute{e}$ fringe are the geometric interference patterns observed when two dense line grating are superposed. Light transmitted through a fixed line grating is deviated by the liquid film surface, producing a distored image of the grating. The $moir\acute{e}$ fringe produced by projection of this optically distored grating onto a second stationary grating permit visualization of the liquid surface and measurement of the liquid film thickness. This study measured the small amplitude of liquid film thickness to the $moir\acute{e}$ fringe pattern produced when spherical metal was dropped glycerin put)1 And the measurement of liquid film thickness flowing down an inclined plate are required to calculate the liquid slope in a position.
전홍신,박병규,고경숙 한국인체미용예술학회 2017 한국인체미용예술학회지 Vol.18 No.2
In this study, an antioxidant activity, anti-inflammatory and antibacterial experiment was conducted to develop natural cosmetic materials depending on biological activity and cytotoxicity of the Clerodendrum trichotomum extract and the results were as follows. The content of polyphenol was 119.723±1.0㎎/g and when different concentrations of the extract were applied, DPPH radical scavenging activity was measured at 3.2, 4.0, 13.5, 24.7, 77.1, and 78.1% respectively. This means that the higher the concentration, the higher antioxidant activity. For antibacterial measurement, S. aureus, S. epidermidis, E. coli, and P. acnes were added. As a result, S. aureus and P. acnes had the highest value(16㎜) at a concentration of 1㎎/㎖, S. aureus had the highest value(16㎜) at a concentration of 5㎎/㎖, and S. epidermidis had the highest value(15㎜) at a concentration of 10㎎/㎖. Also, S. aureus and S. epidermidis had the highest value(16㎜) at a concentration of 20㎎/㎖. ABTS radical scavenging activity was measured at 0.645, 4.677, 15.054, 31.774, 101.237, and 101.022% respectively, when different concentrations of the extract were applied. The result was greater than or similar to Vit and C, which are standard controls, at a concentration of 500 and 1000㎍/㎖. The cell survival rate was 92.738, 84.260, 83.964, 86.987, 86.589, and 70.497% and there was no cytotoxicity of the extract. The expression of iNOS declined when th concentration of the extract was 500㎍/㎖ and in the COX-2 experiment, RAW 264.7 using the pre-treated extract failed to inhibit COX-2 that increased due to LPS. In conclusion, it is considered that the findings of this study can be used as important basic data to develop natural cosmetic materials using the Clerodendrum trichotomum extract.
미용 서비스 실패 유형이 고객만족에 미치는 영향-서비스 회복 공정성의 매개효과 검증-
전홍신,김윤 한국인체미용예술학회 2016 한국인체미용예술학회지 Vol.17 No.1
The aim of this study was to conduct a theoretical examination of the relationship between three factors - namely, the service failure type, the customer satisfaction, and the service recovery justice –, and to suggest some practical considerations for managers of beauty shops to improve the management of their shops. The results of this study demonstrate that a practical recovery system is required not only to respond to customers’ needs, but also to convert risks into opportunities by increasing customer satisfaction in highly risky situations of service failure. The findings also show that profit generation through an increase in customer satisfaction requires intermittent marketing efforts around service quality increase, as well as fair and active claim management in cases of service failures. Therefore, beauty service companies need to put service recovery strategies in place to be able to deal with service failures effectively. It is also worth noting that in events of service failures, maximum positivity in customers’ emotions can be achieved by front-line staff when they are able to observe customers’ emotional changes promptly and to respond to them actively and with appropriate authority.
일점연료분사시스템의 연료분사밸브로서 2유체 분사밸브의 이용
전홍신 한국자동차공학회 1988 오토저널 Vol.10 No.5
본 고에서는 일점연료분사시스템의 문제점을 해결하는 방안 및 장래 유망하다고 보여지는 희박혼합기상태에서 연소상태의 개선을 목적으로, 연료분사밸브로서 미립화특성이 좋은 2유체 분사밸브를 사용하기 위하여 기술하고자 한다.
미용 서비스품질이 고객만족도 및 재방문의도에 미치는 영향
전홍신,박동은 한국미용학회 2018 한국미용학회지 Vol.24 No.3
The purpose of this study is to identify the effects of beauty service quality has on customer satisfaction and revisit intention in order to build and provide customer service-centered strategies and to gain loyal customers. Also, this study aims to provide the basis for improving service quality and establishing business strategies with a new service strategy by offering high-quality beauty service in the field. For the study 443 people were surveyed, and the research hypothesis was verified by using multiple regression analysis. As a result, first, all the empathy, responsiveness, trust, tangibility, and certainty are statistically significant. Second, out of five factors of service quality, tangibility, trust, certainty, and empathy were statistically significant on the revisit intention, but responsiveness was rejected to be partially accepted. Third, the customer satisfaction was statistically significant on the revisit intention.