스포츠 웹사이트의 컨텐츠 요인이 이용만족과 재방문 의사에 미치는 영향

백승헌 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

The purpose of this study is to prepare the actual standards of contents factors which can satisfy sport web site users' desire, and to provide basic materials for operating sport web sites by analyzing the effects of contents factors on use satisfaction and revisit. The subjects of this study were college students going into college located in the area as of 2004. 300 students were sampled using stratified cluster random sampling and were given questionnaires. Total 255 questionnaires were responded, and inadequate materials were excluded. Then for the remaining 21 questionnaires, reliability test(Cronbach's α), Hest, and ANOVA were conducted using statistics program SPSS 11.0. A significant level was P<.05. The following conclusions were obtained. First, in sport web site contents factors, users wanted to be satisfactory to the diversity of provided information most, followed by security, interaction, convenience, and aesthetics. It suggests users' interest in sports and that they want to get great information without direct participation or watching in the condition of guaranteeing personal security. Second, in sport web site contents factors, users' revisit was affected by the diversity of provided information most, followed by interaction, security, convenience, and aesthetics. Like users' satisfaction, as provided information was diverse, users wanted to revisit. But unlike users' satisfaction, interaction was higher than security. It suggests that users wanted to use sport web sites as the means of sports communication. Third, according to demographic characteristics, the use satisfaction of contents factors and revisit intent in sport web sites was higher in male than female. Also it was found that as profits were high, there was many interests in both sport web sites and contents factors.

청양 지역에 분포하는 트라이아스기 후기의 조계리층에서 산출된 규화목 화석

김종헌,백승덕,이원국 공주대학교 과학교육연구소 2003 과학교육연구 Vol.34 No.-

충남 청양 지역에 분포하는 트라이아스기 후기의 조계리층에서 규화목 화석이 발견되었다. 규화목 화석의 산출은 남한에 분포하는 하부중생계 지층에서 최초의 기록이다. 분류학적 연구결과, 구과류에 속하는 Xenoxylon sp.와 Dadoxylon sp.의 2속 2종이 식별되었다. 본 논문에서 구과류 화석의 특징과 비교 및 그 의미에 대해서 고찰하였다. Petrified wood fossils are discovered from the Upper Triassic Jogyeri Formation distributed in the Cheongyang area. The occurrence of petrified fossils is the first record in the Lower Mesozoic strata distributed in South Korea. As a result of anatomical study of wood fossils, two specie belonging to two genera of Xenoxylon sp. and Dadoxylon sp. which belong to conifers, are recognized. This paper deals with the characteristics, comparison and significance of conifer wood fossils.

종합스포츠시설 이용자들의 구매행동과 고객만족과의 관계

정명수,백승헌 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

The purpose of this study that is based on results of previous studies about sports complex users' buying behaviors and general customer satisfaction and hypothetical models is to examine the relationship between sports complex users' buying behaviors and general customer satisfaction using X² test and Discriminent Analysis, These are the results from the structural model based on above-mentioned methods of this study and results from analyzing data, First, in the aspect of sports consumption behavior according to individual peculiarities, there are significant differences in the kinds of sport consumption, the time range of consumption the length of participating time and travel time, Second, inthe aspect of buying behavior of sports facilities, expansion of newest equipments affects consumer satisfaction of facilities, that is to say evaluations after choosing sports facilities, The ability of coaches (8.6%), the size of facilities (7.6%) and classes based on one's athletic ability (7.3%) take the precedence over sports shops (3.0%), convenient facilities such as restaurants and shops (2.9%), kindness of parking guides (2.2%). Third, factors in choosing sports facilities, such as material service, human service and systematic service affect considerably sports consumers' buying behaviors. As a result, perception of sports complex users' buying behaviors makes a better understanding ofgeneral service quality (sports shops, convenient facilities such as restaurants and shops, kindness of parking guides) and a better understanding of general service quality (the ability of coaches, the size of facilities, classes based on one's athletic ability) improves consumer satisfaction, And, finally, high consumer satisfaction produces extremely high buying behavior and intention of word of mouth marketing. It is the base of consumer relationship marketing to perceive service quality from sports complex users' points of view and to maintain and manage facilities to improve general consumer satisfaction.

해양레저스포츠 활성화에 관한 연구

정명수,백승헌,황영길 朝鮮大學校 스포츠科學硏究所 2004 스포츠科學硏究 Vol.15 No.-

With carrying out a five-day work week, workers need to use their leisure time more efficiently. The purpose of this study was to vitalize marine leisure sports by providing virtual and effective materials of marine leisure sports. To do this, this study presented the present state of marine leisure sports, favorite events, the forms of participation, the factors of impediment, satisfaction, and methods for vitalizing according to the nature of sociology of population. The subjects of this study were 400 respondents who resided in G metropolitan city and C province and had experienced marine sports. They were given questionnaires and the followings were obtained. 1. The most favorite event in marine sports was scuba diving, followed by water skiing and windsurfing. 2. In the forms of participation, people moved using a car for two or less days in legal holidays or vacations. For 3-4 days accommodation, a hotel, a guesthouse, and a condominium were preferred most. A female group went with their family and a male group went with friends or seniors and juniors in school. 3. In the factors of impeding mahne leisure sports, the age and academic background group responded expense, time, safety accidents, and location, while the income group answered expense and location. There were no factors of impediment in the sex group. 4. In the satisfaction in participation in marine leisure sports, the sex and age group had high satisfactory in all factors such as program, transportation, facilities, and information. While the academic background group was satisfied with transportation and information, the income group was satisfied with program and facilities. 5. In the methods of vitalizing marine leisure sports, the sex, age, and academic background group indicated investing in facilities, developing new programs, Providing marine leisure sports-related information, and training professional coaches. The income group answered investing in facilities, providing information, and training professional coaches except developing new programs.

상업스포츠 시설의 환경적 특성이 고객만족 및 구매행동에 미치는 영향

임효택,정명수,백승헌 朝鮮大學校 스포츠科學硏究所 2003 스포츠科學硏究 Vol.14 No.-

To present desirable plans for choice of sporting goods by analyzing factors which are related to sporting goods of users who are using sport facilities, 700 subjects who had used sports facilities in Kwangju, were sent a questionnaire. The result were as follows 1. The age was significantly related to all factors, except for the quality of sporting goods. While interest in sporting goods and recognition of brands on sporting goods were greater in the males than females, the perception of quality of sporting goods was higher in females than in males. 2. The age was significantly related to all factors, except for the perception of quality of sporting goods. Generally, the interest in sporting goods and the perception of quality of sporting goods were higher than the other factors irrespective of age. 3. The condition of marriage was not significantly related to all factors, except for the interest in sporting goods. Married persons had taken greater interest in sporting goods than unmarried persons. 4. The academic career was significantly related to all factors, except for the perception of brands of sporting goods. 5. Monthly income was significantly related to all factors, except for the perception of quality of sporting goods. Generally, the more income, the greater interest in sporting goods. 6. Sport events in which the subjects had participated, were significantly related to all factors, except for the perception of quality of sporting goods. Levels of participation was significantly related only to the perception of brands of sporting goods. 7. Participants in golf had had stronger interest in sporting goods. While participants in bowling had had higher perception of quality of sporting goods participants who had participated in sport activities about 1 time a week had had higher perception of brands of sporting goods 8. There were significant differences, between the males and the females, in satisfaction with sporting goods.

울산연안 定置網에 어획된 漁類의 종조성 및 양적변동

한경호,김종헌,백승록 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.1

울산 정자연안 외측에 위치한 정치망에서 1998년 2월, 4월 ,6월 ,8월 10월 및 12월, 총 6회에 걸쳐 어획물을 채집하여, 魚類의 種組成, 量的變動 및 群集構造에 대하여 연구하였다. 채집된 어류는 총 12目 45科 89種, 62,978개체였고, 총 생체량은 6,494㎏이였다. 농어目 어류와 쏨뱅이目 어류가 총 56種으로 전체 出現種數의 62.9%를 차지하여 가장 우점하는 目들로 나타났으며, 科別로는 전갱이科와 참복科 어류가 각각 7種 出現하여 가장 많은 種이 出現하였다. 총 89種의 어류중 個體數는 고등어, 전갱이, 멸치 및 말쥐치의 4種이 全個體數의 89.7%를 차지하여 우점하였다. 生體量은 고등어, 전갱이, 꽁치, 말쥐치, 전어, 꼬치고기, 멸치, 정어리, 임연수어 및 덕대의 順으로 이들 10種이 全生體量의 95.5%를 차지하여 우점하였다. 出現 個體數와 生體量은 고수온기인 여름에 높게 나타났으며, 저수온기인 봄과 겨울에 낮게 나타나 수온과 밀접한 관계가 있었다. 월별 出現種數는 2월과 10월에 비교적 적은 種이 출현하였으며, 4월에 49種, 6월에 50種이 나타나 가장 많은 種이 출현하였고, 8월에 46種, 12월에 44種이 出現하였다. 종다양도지수(H')와 0.693~2.146으로 4월에 가장 높은 값을 보였고, 8월에 가장 낮은 값을 보였으며, 우점도지수는 다양도지수와 반대로 4월에 가장 낮은 값을 8월에 가장 높았다. 주요 魚種의 出現頻度를 보면 고등어, 전갱아. 멸치, 말쥐치, 꽁치, 전어, 망상어 및 정어리가 거의 年中 出現하여 본 해역에서의 주거종이었다. Fishes were collected by set net to determine seasonal species composition and fluctuation in abundance in coastal waters of Ulan. Korea, in February, April, June, August and December, 1998. A total of 62,978 fishes (6,494㎏) were sampled and classified into 12 orders, 45 families and 89 species. The most dominant orders were Perciformes and Scorpaeniformes, which accounted for 62.9% of the total. The most dominant families were Carangidae and Tetraodontidae, each represented seven species. The most dominant species were Scomber japonicus, Trachurus japonicus, Engraulis japonicus and Maurolicus muelleri, which accounted for 89.7% of the total fishes collected. The most dominant in biomass were Scomber japonicus, Trachurus japonicus, Cololabis saira, Thamnaconus modestus, Konosirus punctatus, Sphyraena pingues, Engraulis japonicus, Sardinops melanostictus, Pleurogrammus azonus and Pampus echinogaster. Those species together accounted for 95.5% of the total biomass. The number of individuals and the biomass were much higher in summer than in spring and winter, and closely correlated with water temperature. The number of species showed a peak in August, with 46 species, and the lowest number in February, with 30 species. The diversity index was the highest in April(H'=2.146) and the lowest in August(H'=0.693).

Interface-generated spin current and spin-orbit torques

Seung-heon Chris Baek,Young-Wan Oh,Kyung-Jin Lee,Byong-Guk Park 한국자기학회 2019 한국자기학회 학술연구발표회 논문개요집 Vol.29 No.1

Record Effective Mobility Obtained From In_0.53Ga_0.47As/In_0.52Al_0.48As Quantum-Well MOSFETs on 300-mm Si Substrate

Seung-Woo Son,Jung Ho Park,Ji-Min Baek,Do-Kwyn Kim,Seung Ryul Lee,Sang-Moon Lee,Jieon Yoon,Jungtaek Kim,Woo-Bin Song,Sunjung Kim,Dong Suk Shin,Yihwan Kim,Seung Heon Shin,Tae-Woo Kim,Jung-Hee Lee,Dae-H IEEE 2017 IEEE electron device letters Vol.38 No.6

<P>In this letter, we have investigated the properties of In0.53Ga0.47As quantum-well (QW) metal-oxide-semiconductor field-effect-transistors (MOSFETs) on a 300-mm(100) Si wafer. We have explored the impact of scaling down In0.53Ga0.47As channel thickness (t(ch)) from 15 to 5 nm. The fabricated devices show excellent electrostatic integrity, such as subthreshold-swing (SS) < 80 mV/decade and drain-induced barrier-lower (DIBL) < 20 mV/V. Furthermore, we have extracted the effective mobility (mu(n_eff)) of the fabricated devices to investigate the carrier transport properties of the InGaAs MOSFETs with different values of t(ch). The device with t(ch) = 15 nm displayed a value of mu(n_eff) = 2, 190 cm(2)/V-s at room temperature. This value was found to decrease as tch was scaled down.</P>

Novel Operation of a Multi-Bit SOT Memory Cell Addressed With a Single Write Line

Baek, Seung-heon Chris,Oh, Young-Wan,Park, Byong-Guk,Shin, Mincheol IEEE 2017 IEEE transactions on magnetics Vol.53 No.11

<P>Spin-orbit torque (SOT) originates from the spin-orbit interaction of non-magnetic heavy metals (HMs), allowing for an electrical manipulation of perpendicular magnetization in HM/ferromagnet (FM)/oxide structures. In this paper, we experimentally demonstrate the SOT-induced switching of two FM bits addressed with a single write line. We fabricate a device consisting of two perpendicularly magnetized Ta/CoFeB/MgO structures with a common Ta underlayer, in which the magnetization directions of the two FM bits could be concurrently controlled by injecting a single current pulse. This suggests that multiple bits in SOT-based devices can be written as either '0' or '1' at the same time. Moreover, the selective switching of a specific bit is achieved by differentiating the critical switching currents between the two FM bits, which is crucial in demonstrating multi-level cell SOT memory. Our results provide an efficient writing mechanism, enabling wider applications of SOT-based spintronic devices.</P>

Acoustic emission monitoring of water boiling on fuel cladding surface at 1bar and 130bar

Baek, Seung Heon,Wu, Kaige,Shim, Hee-Sang,Lee, Deok Hyun,Kim, Jung Gu,Hur, Do Haeng Elsevier 2017 MEASUREMENT -LONDON- Vol.109 No.-

<P><B>Abstract</B></P> <P>This paper aimed to observe the acoustic emission (AE) signals of water boiling occurring on fuel cladding surfaces under flow conditions at 325°C and 130bar. Visualization test was first performed to identify a correlation between the water boiling phenomenon and AE signals in a transparent glass cell at 1bar. Based on the correlations obtained at 1bar, the boiling AE signals were obtained at 325°C and 130bar and successfully analyzed through various AE parameters, such as frequency, energy and hit number. Relatively small bubbles were formed at 130bar, and the bubble density increased with the increase of the internal heater temperature.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Acoustic signals emitted from water boiling at 1 bar and 130 bar are presented. </LI> <LI> Water boiling on fuel cladding surfaces is monitored using acoustic emission method. </LI> <LI> Acoustic emission data of water boiling is correlated with visualization test at 1 bar. </LI> <LI> Real boiling signals are extracted from the raw data mixed with the heater noises. </LI> <LI> The acoustic energy levels of bubbles at 130 bar are lower than those at 1 bar. </LI> </UL> </P>