산림휴양지에서 쓰레기투기 행동과 규범에 미치는 설득메시지의 효과

김상오,차경수,안기완 ( Sang Oh Kim,Kyung Soo Cha,Ki Wan An ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.3

This study was conducted to find out whether persuasive messages with different contents of information (aesthetic, aesthetic+ecological, aesthetic+ecological+economic, aesthetic+ecological+economic +educational) about the consequences of littering influence users` awareness of the consequences of littering, personal norms and littering behaviors in a recreation setting based on the Schwartz`s norm activation theory. Data were collected at the Second Campground in the northern managerial district of Chirisan National Park. Of the total 177 questionnaires distributed, 144(85%) were used for the study. In addition to that, in order to find out whether personal norms on littering were changed from 1994 to 1996, data collected at the same campground in 1994 were also partly used. Based on the result of the study, persuasive messages didn`t directly affect the users` level of the awareness of the consequences(AC) of littering, personal norms, and littering behavior. People whose awareness of the consequences of littering are higher, however, tended to have stronger personal norms about littering. And also, people whose awareness of the consequences of littering are higher or people whose personal norms are stronger appeared to litter fewer than people whose awareness of the consequences or the strength of personal norms are lower. The extent of personal norms about littering was not changed through 1994 to 1996. The results were discussed and some management alternatives were suggested.

무등산 도립공원 시설물의 관리상태 평가와 개선방안

김상오,오광인 ( Sang Oh Kim,Kwang In Oh ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.4

This study applied the normative approach to establish evaluative standards for the facilities in Moodeung-san Provincial Park. Based on the established evaluative standards, this study examined the present facility managerial conditions of the park, and suggested some management alternatives to solve the identified problems. Data were collected by on-site survey and a mail-back questionnaire during August of 1996 in Moodeung-san Provincial Park. Out of 1,173, 519 respondents (44.2%) were used for the analysis. According to the results, three indicators out of five established indicators except `adequacy of garbage cans` and `adequacy of trail-guidance facilities` were in worse conditions than the established evaluative standards. The three indicators were 1) adequacy of toilets, 2) cleanness of toilets, 3) waiting time for using public transportations. The present condition for `adequacy of trail-guidance facilities` was the same with the evaluative standard. This study suggested some management strategies to improve these problematic conditions, and introduced how managers may use these information for the facility management of the park.

무등산 도립공원의 등산로 이용현황과 등산로 선정요인

김상오,오광인 ( Sang Oh Kim,Kwang In Oh ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.2

Understanding of the reasons why users in recreation settings select particular trails may provide useful information for effective recreation resources management. This study investigated the present use of the major trails in Mudeung-san Provincial Park and the major influential factors on trail selection . This study was conducted in Mudeung-san Provincial Park stretching over Hwasun-gun and Damyang-gun of Chonnam Province and Kwang-ju city during August in 1996. Data were collected through on-site survey and mail-back questionnaire. 519(44.2%) out of 1173 survey samples were used for analysis. Reasons for selecting a particular trail were classified into 8 major factors. In overall, the order of the importance degree of the factors was 1) aesthetics of landscape, 2) safety(from physical and crime), 3) conditions for health, 4) quietness, 5) familiarity, 6) on the way to the destination, 7) convenience/social, 8) others` intention. There were differences in the degree of importance of each factor depending on trails, users` characteristics(eg., gender, age, group size, visit experience, etc.) and users` behavioral patterns. Recreation motivations were classified into 5 major factors. The order of the importance degree of the factors was 1) contacting with nature, 2) self-training, 3) solitude, 4) social interaction, 5) appreciating cultural properties. Regardless of trails, `contacting with nature` was the most important factor, and the degree of importance in the other 4 motivational factors showed only a little differences in order according to the trails. There were correlations between major factors for trail selection and recreation motivations. The results of this study may provide foundational information for establishing effective management strategies through better understanding of the present use of trails and influential factors on trail selection. It can be used for reducing the present social and ecological problems caused by use concentration on certain trails and providing users with better quality of diverse recreational experiences. This study discussed the findings, and suggested some management strategies based on these information.

노트북 케이스용 마그네슘의 자기연마가공에서 영구자석의 효과

김상오,강대민,곽재섭,정영득,Kim, Sang-Oh,Gang, Dea-Min,Kwak, Jae-Seob,Jung, Young-Deug 한국금형공학회 2012 한국금형공학회지 Vol.6 No.2

In previous study, it showed that the MAP was greatly effective polishing process for magnesium plate. But it had lower efficiency than magnetic materials such as SM45C. It was very difficult to cut non-magnetic materials using the MAP process because the process was fundamentally possible by help of a magnetic force. This study aimed to verify analytically formation of the magnetic field in a case of the non-magnetic materials especially focused on magnesium plate. So, In this study, the magnetic density flux was predicted using simulation program. As a result, the magnetic density flux was lower at the center of pole on inductor than outside. It had same result on the experimental verification. And magnetic force was lower according to increase of working gap. So, to improve the magnetic force, permanent magnet was installed under the workpiece. In that case, the magnetic density flux not only at center but also at outside of pole was increased. Therefore, the efficiency of magnetic abrasive polishing was also increased. A design of experimental method was adopted for assessment of parameters' effect on the MAP results of magnesium plate for improving the magnetic force.

공구형상 최적화 및 비자성체의 자가연마 특성 연구

김상오,유만희,곽재섭,Kim, Sang-Oh,You, Man-Hee,Kwak, Jae-Seob 한국생산제조학회 2010 한국생산제조학회지 Vol.10 No.6

The magnetic abrasive polishing (MAP) process is used to achieve the nano-meter grade polishing results on flat or complicated surface. In previous study, polishing the stainless steel plate which is a non-magneto-material was tried. To polish non-magneto-materials using the MAP process was very difficult because the process was fundamentally possible by the help of a magnetic force. Therefore, it had lower efficiency than magneto-materials such as SM45C. In this study, optimization for tool geometry of the MAP was performed to improve the magnetic force between tool and workpiece. Moreover, a permanent magnet was installed below the non-magneto-material to improve the magnetic force. And then the design of experiments was carried out to evaluate the effect of the MAP parameters on the polishing results.

알루미늄의 자기연마가공에서 영구자석을 이용한 자기력향상

김상오(Sang-Oh Kim),곽재섭(Jae-Seob Kwak) 한국생산제조학회 2008 한국생산제조학회지 Vol.17 No.5

휴양지역에서 규범적 평가기준에 미치는 정보의 효과

김상오(Sang Oh Kim),(Bo Shelby) 한국산림과학회 2002 한국산림과학회지 Vol.91 No.2

N/A

인구사회학적 특성 및 방문행태에 따른 등산객의 산악자전거에 의한 상충인지 -무등산도립공원을 대상으로-

김상오 ( Sang Oh Kim ),김상미 ( Sang Mi Kim ) 한국환경생태학회 2011 한국환경생태학회지 Vol.25 No.5

지금까지 하이킹 활동이 주를 이루어 왔던 산림휴양지역에 산악자전거 활동(MTB)이 도입되면서 휴양지역의 이용행태에 변화를 가져오고 있으며, 또한 MTB 활동의 증대는 휴양지역의 생태적, 사회적 문제를 초래할 우려가 있다. 본 연구는 인구사회학적 특성 및 방문행태에 따른 상충인지를 포함하여 MTB에 의한 등산객의 상충인지를 조사하였다. 자료수집은 2010년 9월중 무등산도립공원 등산객을 대상으로 현장설문조사를 통해 이루어 졌다. 설문조사에 참여한 388명 중 374명의 응답이 본 연구의 분석에 이용되었다. 응답자의 30.2%가 무등산도립공원내에서 MTB를 보거나 만난 것(평균: 1.7회/조사당일)으로 나타났으며, 응답자의 77.1%는 무등산 도립공원 내 MTB활동이 문제가 있다고 생각하였다. 응답자의 73.5~83.2%가 산악자전거인의 4가지 주요 행동(예, 등산로 상에서 너무 빨리 달리는 산악자전거, 등산로를 차지하고 있는 산악자전거, 등산객 옆을 너무 가까이 지나가는 산악자전거, 등산객에게 불쾌한 행동을 하는 산악자전거인)에 의하여 상충인지를 느끼는 것으로 분석되었다. 응답자의 48.5~62.4%가 "사회적 가치 상충", 11.1~32.4%가 "상호간 상충", 16.8~26.6%가 "상충 없음" 유형에 속하는 것으로 각각 나타났다. 상충유형은 인구사회학적(예, 성별, 연령, 교육수준) 및 방문(예, 방문횟수, MTB와의 조우경험) 특성과 관련이 있었다. 그러나 그러한 관계는 "MTB와의 조우 경험"을 통제하였을 때 대부분의 경우에서 성립되지 않았다. Increasing mountain biking (MTB) in forest recreation areas is changing the behavioral patterns in the areas where hiking has been a dominant activity, and it may cause ecological and social impacts to the areas. This study examined hikers` perceived conflicts by MTB including the relationship between socio-demographic and visiting characteristics and perceived conflict. On-site survey was conducted in Mudeungsan Provincial Park (MPP), Korea, during September, 2010. Out of 388 hikers participated in the survey, 374 responses were used for data analysis. 30.2% of the respondents encountered or saw MTB (avg.: 1.7 times) in MPP. Overall, 77.1% of respondents thought MTB in MPP was a problem. 73.5%~83.2% of respondents perceived conflict by four major MTB behaviors (e.g., too fast running MTB in trails; MTB bikes occupying trails; MTB bikes passing by hikers too closely; MTB bikers doing unpleasant behaviors to hikers). Based on the type of conflict, 48.5~ 62.4% of respondents fell in the type of "social values conflict (SVC)", 11.1~32.4%, "interpersonal conflict (IC)", and 16.8~26.6%, "no conflict (NC)", respectively. Types of conflicts were related with socio- demographic (e.g., gender, age, education) and visiting characteristics (e.g., number of visits, experience of encountering MTB). Such relationships were nonexistent in most cases when the "experience of encountering MTB" was controlled.

커플드 인덕터기반의 계통 연계형 Ćuk CCM 인버터의 동적 모델링과 제어기 설계

김상오(Sang-Oh Kim),한병철(Byeongcheol Han) 대한전기학회 2022 전기학회논문지 Vol.71 No.1

This paper presents a dynamic modeling and controller design for a grid-connected Ćuk continuous conduction mode (CCM) inverter with a coupled inductor. The primary- and secondary-side inductors of the conventional Ćuk converter are integrated into one coupled inductor in the presented Ćuk CCM inverter, and it reduces the number of passive components. To make the Ćuk CCM inverter with a coupled inductor connected with the grid utility, an output current controller should be designed appropriately. However, the output current control of the presented Ćuk inverter is difficult due to the existence of the right-half plane (RHP) zeros in its transfer function. To solve the problem, a dynamic model of the Ćuk CCM inverter with a coupled inductor is developed and a repetitive controller (RC) coupled with feedback and feedforward controllers is applied to this inverter. A practical design guideline is also presented to select control parameters. Experimental results using a 200-W prototype demonstrate the acceptable performance of the proposed controller.

휴양지역에서 이용자의 기대 , 규범 , 상충인지에 미치는 정보의 효과

김상오 ( Sang Oh Kim ) 한국산림과학회 1997 한국산림과학회지 Vol.86 No.3

Users` norms, expectations and recreation motives are major influential factors on perceived conflict in recreation settings. This study was conducted to examine how information affects users` norms and expectations, and subsequently, the extent of perceived conflict. Data was collected at the Second Campground in Chirisan National Park in 1994. Of two hundred eighty on-site survey questionnaires distributed, 253(90.4%) were used for analysis. According to the result of the study, information changed users` normative standards in accord with the content of information and increased the extent of norm convergence. However, it did not change users` expectations and didn`t reduce the degree of perceived canflict. The possible reasons were discussed. Some directions for more effective use of information to reduce perceived conflict were also suggested.