편측 수근관 증후군 환자에서 무증상 손의 추적 관찰

박원범,이성재,현정근,전재용,김경열 대한재활의학회 2006 Annals of Rehabilitation Medicine Vol.30 No.6

시뮬레이션 기법을 활용한 대대급 무인항공기 탐지모형 효과분석 연구

박원범,이문걸 한국국방경영분석학회 2023 한국국방경영분석학회지 Vol.49 No.1

Unmanned Aerial Vehicles (UAVs) are operating for the purpose of reconnaissance and surveillance for dangerous areas and obtaining information more quickly, even if people are restricted and accessed, and their use in the military has increased rapidly in recent. In particular, considering the operational environ- ment on the Korea peninsula and the recent series of political situations such as illegal border crossing etc., search operations using UAVs are necessary for the success of operational missions. This study is to pro- vide various effective search insights and methodology for target’s moving on the ground using battalion-level UAVs. The proposed method establishes an effective search model through the application of search theory and actual specifications of the current operating UAV system and implements it with NetLogo simulation software to verify the validity of the model. In addition, the optimal search plan is deriving from comparing the results with a random search method considering speed and altitude. By using several search scenarios, we presents analysis results such as target detection probability for each search pattern considering the search environment and target motion instance, sweep width, and speed.

상습 음주운전자의 심리적 특성에 따른 음주운전 대책에 관한 실증적 연구

박원범,장석용,정헌영 대한교통학회 2011 대한교통학회지 Vol.29 No.5

According to statistics, drunk drivers who repeatedly violate the DUI (Driving under influence) regulation have been continuously increased, and now the habitual drunk drivers become a societal problem. Employing a confirmative factorial analysis of structural equation model to analysis psychological characteristics of habitual drunk drivers and also seek countermeasures, this study identify the difference among three different groups of drivers: 1) sober drivers, 2) drivers with a DUI violation record, and 3) drivers with more than two records. The results of this study are as follows:First, remedies and educational contents to rectify drunk drivers can be differentiated according to their drunk driving records. Second, using defense mechanism (e.g., rationalization, projection, sublimation), drunk driving psychology (such e.g., sense of guilt, shame, embarrassment) and self-esteem (e.g., affirmation, denial) as theory variables, a Structural Equation is constructed to represent Psychological Characteristics of drunk driving according to records on drunk driving. Third, as a result of analysis of the Psychological Characteristics Model, measures for prevention and reduction of drunk driving suitable for the characteristics of respective group are also suggested. Forth, drunk driving measures based on drinking individuality are complemented by concurrence analysis on records of drunk driving records and National Alcoholism Screening Test (NAST) score. Also, two or more times recorded drunk drivers are classified as inveterate drunk drivers. 최근 음주운전자 중 과거 음주운전 전력이 2회 이상인 경우가 많아 음주운전을 상습적으로 하는 운전자가 사회적 문제로 대두되고 있다. 본 연구는 상습적 음주운전자들이 가지고 있는 심리적 특성 및 대책을 모색하고자 비음주운전자들과 1~2회 이상 음주운전자들 집단 간 차이를 구조방정식의 확인적 요인 분석으로 알아보고 대책마련을 하고자 했다. 연구결과를 정리하면,첫째, 음주운전 단속 전력별로 운전자들의 희망 치료 방식 및 교육내용을 파악하여 제시할 수 있었다. 둘째, 방어기제(합리화, 투사, 승화)와 음주운전 심리(죄의식, 수치심, 곤혹감), 자존감(긍정, 부정)을 이론변수로 사용하여 음주운전 전력별 음주운전 심리특성 모형을 구조방정식을 통해 구축할 수 있었다. 셋째, 음주운전 심리특성 모형의 분석 결과 각 집단의 특성에 맞는 음주운전 예방 및 저감대책을 제시할 수 있었다. 넷째, 음주운전 단속 전력과 한국형 알코올 중독자 선별 검사 점수를 대응분석하여 개인의 음주특성에 따른 음주운전 대책 부분을 보완 할 수 있었다. 또한, 음주운전 2회 이상 전력자를 상습 음주운전자로 제시하였다.

대대급 무인기 이동표적 탐색방안

박원범,이문걸 한국산업경영시스템학회 2022 한국산업경영시스템학회 학술대회 Vol.2022 No.춘계

한국 일부 지역 노인들에서 균형 자신감과 신체활동 능력과의 관계

박원범,임재영 대한노인병학회 2009 Annals of geriatric medicine and research Vol.13 No.4

Background: To investigate the physical performance and changes in function by age and sex in community dwelling elderly and to assess the associations between balance confidence and physical performance and functioning. Methods: We recruited 180 people aged 65 years or older capable of independent ambulation and activities of daily living. They were divided into three groups according to age: 65-74 years, 75-84 years and 85 years or older, to assess the differences in physical functioning between the groups. Short physical performance battery(SPPB), activity based balance confidence(ABC) and hand and thigh strengths were measured as variables of physical performance. Pain related disabilities and body composition were also included in the analysis. Results: SPPB scores in women decreased more than that of men in those younger than 85 years, but this difference was not significant for those older than 85 years. ABC scores showed the same decreasing pattern, and sex diffe- rence continued in the oldest group. For pain related disabilities, a remarkable gender gap was identified. Hand and thigh strengths decreased with age, with the more prominent decrease seen in men than in women from the older age group. Although most variables correlated with the physical performance evaluated by the SPPB, only the ABC significantly influenced the SPPB after controlling for the covariates. Conclusion: Balance confidence in the specific activity plays a major role in physical performance and function.

12주간의 고강도 순환운동이 중년 비만 여성의 복부 지방, 체력, 혈중 지질 및 인슐린 저항성에 미치는 영향

박원범,조현석,이만균 국민체육진흥공단 한국스포츠정책과학원 2019 체육과학연구 Vol.30 No.2

[Purpose] The study examined the effects of a 12-week high intensity circuit training (HICT) on abdominal fat, physical fitness, blood lipids, and insulin resistance in middle-aged obese women. [Methods] Thirty obese women, aged 32-48 yrs, were recruited and randomly assigned to either HICT group (TR; n=15) or control group (CON; n=15). Subjects in the TR group participated in HICT of which resistance exercise and aerobic exercise were performed with a duration of 40 min/session and 3 sessions/wk for 12 weeks, whereas subjects in the CON group were asked to maintain their normal life patterns. Dependent variables included abdominal fat area, body composition, physical fitness, blood lipids profiles, and insulin resistance index. Analysis of variance with repeated measures with Bonferroni corrections was used to compare the outcomes between two groups. [Results] Main findings of the present study were as follows: 1) compared to the CON group, the TR group had significant reductions in overall (i.e., body mass index and percent body fat) and abdominal obesity (i.e., waist circumference, total abdominal fat area, visceral fat area, subcutaneous fat area, and visceral fat area-subcutaneous fat area ratio), 2) compared to the CON group, the TR group had significant improvements in health-related physical fitness (i.e., muscular strength, muscular endurance, muscle power, flexibility, balance, and cardiorespiratory endurance), and 3) compared to the CON group, the TR group had significant improvements in fasting lipids, glucose, insulin, and insulin resistance. [Conclusions] The current findings of the study suggested that HICT would be an effective exercise intervention to improve metabolic complications associated with obesity and poor physical fitness in obese middle-aged women. [목적] 이 연구의 목적은 중년 비만 여성을 대상으로 12주간의 고강도 순환운동(high intensity circuit training: HICT)이 복부 지방, 신체구성, 체력, 혈중 지질, 그리고 인슐린 저항성에 미치는 영향을 규명하는 것이다. [방법] 체지방률이 30% 이상이고, 연령이 32~48세인 중년 비만 여성 30명을 선정하여 HICT에 참여하는 운동집단과 통제집단에 각각 15명씩 무선할당 하였다. 운동집단의 대상자는 저항성운동과 유산소운동으로 구성된 HICT를 회당 40분, 주 3회, 12주간 실시한 반면, 통제집단의 대상자는 동일한 중재 기간 동안 평소의 생활습관을 그대로 유지하도록 하였다. 복부 지방, 신체구성, 체력, 혈중 지질, 그리고 인슐린 저항성과 관련된 종속변인을 측정한 후, 반복 이원변량분석을 이용하여 두 집단 간에, 그리고 사점검사와 사후검사 간에 비교하였다. [결과] 이 연구에서 얻은 주요 결과는 다음과 같다. 1) 운동집단의 총복부 지방면적, 내장지방면적, 피하지방면적, 그리고 내장지방면적/복부 지방면적 비율이 유의하게 감소되었다. 2) 운동집단의 체중, 체질량지수, 체지방량, 체지방률, 허리둘레, 그리고 허리엉덩이둘레 비율이 유의하게 감소되었다. 3) 운동집단의 근력, 근지구력, 순발력, 유연성, 평형성, 그리고 심폐지구력이 유의하게 향상되었다. 4) 운동집단의 총콜레스테롤과 중성지방이 유의하게 감소되었다. 5) 운동집단의 공복 혈당, 공복 인슐린, 그리고 HOMA-IR이 유의하게 감소되었다. [결론] 이 연구에서 얻은 결과를 종합해볼 때, 12주간 실시한 HICT는 복부 지방의 감소, 신체구성의 개선, 체력의 향상, 그리고 혈중 지질과 인슐린 저항성의 개선에 공헌한 것으로 결론지을 수 있다.

실 규모 터널 주행실험을 통한 터널 경계부 휘도 기준의 적정성 검증

박원일,조원범,정준화 한국도로학회 2015 한국도로학회논문집 Vol.17 No.6

PURPOSES: This study aimed to evaluate the appropriateness of safety with the standard for threshold zone luminance as specified in the Recommendation for Lighting of Traffic Tunnel, which has been widely adopted worldwide. METHODS: A driving test of the subject in a full-scale road tunnel was conducted. The adaptation luminance and threshold zone luminance, which should be known for the driver to perceive an object within stopping sight distance, were obtained. These values were compared with the adaptation luminance and threshold zone luminance obtained by the existing reduced model test and tunnel lighting standard that has served as a guideline for the current threshold zone luminance standard. RESULTS : According to this study, threshold zone luminance should be increased to at least 1.8 times the value proposed in the existing studies and to twice the domestic tunnel lighting standard (KS C 3703: 2014). CONCLUSIONS : The threshold zone luminance proposed in this study differs largely from that obtained from indoor tests and from the current tunnel lighting standard used worldwide; this difference may be attributed to the fact that the indoor tests did not incorporate driving workload, non-uniformity of luminance distribution in terms of sight, and factors that reduce the visibility of the driver, such as the light reflected into the driver’s eyes. Hence, it is necessary to further review the factors that reduce the visibility of drivers approaching tunnels in order to determine the rational tunnel threshold zone luminance.

터널 경계부 휘도수준에 따른 운전자 연령대별 안전수준 비교

조원범,정준화,김도경,박원일 한국도로학회 2015 한국도로학회논문집 Vol.17 No.1

PURPOSES : The purpose of this study is to suggest a basis for setting appropriate safety goals specifically related to the threshold zone luminance in a vehicular traffic tunnel. . METHODS: In the test, drivers were divided into two groups. One group consisted of all drivers (average drivers) group with an age ratio of drivers holding domestic driver's license and driver group by age to produce threshold zone luminance in the tunnel. The threshold zone luminance produced as a result was used to analyze how it affects the safety level of each driver group and provide a basis for setting an appropriate safety criterion that can be used to determine threshold zone luminance. We used test equipment, test conditions, and ananalysis of threshold zone luminance identical to that reported by ChoandJung(2014) but the values of adaptation luminance in our analys is were expanded to range from100 to10,000 cd/m2. RESULTS : Adaptation luminance and threshold zone luminance are found to be related by a quadratic function. The threshold zone luminance needed by older drivers to ensure a certain safety level is significantly higher than that for drivers of other age brackets when adaptation luminance increases. 56% of older drivers are at an increased risk of an accident at the same luminance for which the safety level of average drivers is 75%. The safety level that can be achieved for older drivers increases to above 60% when threshold zone luminance level is set with the goal of attaining a safety level of more than 85% for average drivers. The safety level that can be attained for average drivers is above 90% when the threshold zone luminance is high enough to ensure over 75% in the safety level of older drivers. Results of this study are applicable to highways and others whose designed speed is 100 km/h. CONCLUSIONS : Threshold zone luminance determined on the basis of drivers having average visual ability is of limited value as a performance standard for ensuring the safety of older drivers. Hence, safety level for older drivers should be considered separately from safety levels for drivers with an average ability to avoid risk. Upward adjustment of older drivers' safety level in the process of determining appropriate threshold zone luminance in a vehicular traffic tunnel may bring both tangible and intangible benefit as a result of reducing accidents. However, there is an associated dollar cost arising from installing and operating lights. As a result, the economic impact of these trade-offs should also be considered.

미이크로파 및 밀리미터파 주파수 영역에서 Fabry-Perot Open Resonator를 이용한 유전체 측정에 관한 연구동향

박동민,서원범,최진주 한국전기전자재료학회 2000 전기전자재료 Vol.13 No.9

휘도대비 기반 시인성능 기준 정립 연구

조원범,정준화,박원일,윤천주,이석기 한국도로학회 2016 한국도로학회 학술발표회 논문집 Vol.2016 No.06

도로 조명의 등급 설정을 위해 적용된 개념은 Luminance Concept과 Visibility Concept으로 구분이 가능하다. 전자는 노면의 휘도 분포(평균휘도, 균제도 등)를 기준으로 도로 조명의 수준(등급)을 평가하는 개념으로 한국을 비롯한 거의 대부분의 국가에서 CIE의 권고사항을 수정하여 기준으로 활용하고 있다. 후자는 운전자의 장애물 식별 능력과 직접적으로 관련된 장애물과 노면의 휘도대비를 기준으로 도로 조명 의 수준(등급)을 평가하는 개념으로 미국(ANSI) 등 북아메리카 일부 국가 및 유럽에서 적용되고 있다. 본 연구는 Visibility Concept의 개념을 활용한 도로 조명 시인성능 평가 기준 설정을 위한 목적으로 공용전 도로에서 피험자 주행실험을 수행하였다. 실험은 장흥송추우회도로 건설공사(서울지방국토관리 청) 구간 중 직선구간 왕복 2.0km 구간에서 60대 피험자 각 30명을 대상으로 2015년 8월 야간에 수행되 었다. 실험에 활용된 승용 차량의 전면창 투과율은 41.46%이다. 대칭 조명 방식의 가로등을 활용하여 특 정 노면 휘도를 구현하였으며, 다양한 반사율의 종이 박스 및 밝기 조정(디밍)이 가능한 조명 박스를 활용 하여 인위적으로 Positive Contrast(장애물이 노면 보다 밝은) 조건에서의 노면 및 장애물의 휘도 관계를 구현하였다. 노면 휘도(Ls)는 0.3, 0.6, 1.6, 3.0 cd/m2의 4가지 조건으로 구성되었으며, 장애물 휘도(Lo) 는 Positive Contrast 조건이 묘사될 수 있도록 노면 휘도(Ls)와의 관계가 구성되었다. 그림 1은 실험결과로 도출된 60대 피험자의 노면 휘도(Ls)별 장애물 휘도(Lo)와 15백분위 장애물 확인 거리(Dop)의 관계로, 향후 이 결과를 활용하여 Visibility Concept(휘도대비) 기반의 시인성능 기준을 정 립할 계획이다.