가압과 가열 가능한 금속 튜브 공진센서를 이용한 액상 시료 끓는점 측정 및 상변화 연구

손석범,이봉재,이정철 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.05

전기적 가열이 가능하며 구조적으로 강건한 기계적 공진기를 이용한 액체의 밀도 측정

손석범 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.7

Relation of Urinary Retention and Functional Recovery in Stroke Patients During Rehabilitation Program

손석범,정성윤,강석,윤준식 대한재활의학회 2017 Annals of Rehabilitation Medicine Vol.41 No.2

Objective To investigate the relationship between urinary retention and short-term functional recovery in subacute stage after stroke.Methods The medical records of 94 patients admitted to the rehabilitation unit of Korea University Guro Hospital were reviewed retrospectively. The postvoid residual urine (PVR) was measured at least once a day using a bladder scan, and urinary retention (UR) was defined when the daily PVR volume consistently checked more than 100 mL. Clinical data and functional outcomes of patients in the rehabilitation ward were collected. Functional outcomes were measured using the Mini-Mental State Examination (MMSE), Berg Balance Scale (BBS), Functional Ambulation Category (FAC) level, Fugl-Meyer Assessment (FMA), and Modified Barthel Index (MBI) at admission (or transfer) and discharge. The data of patients with and without urinary retention were compared and analyzed.Results Of the 94 participants, 25 patients were classified to the UR group and 69 were classified to the non-UR group. At the initial stage of rehabilitation, the scores of MMSE, BBS, FAC, MBI were significantly worse in the UR group (p<0.05). Both groups showed significant improvements of all functional outcomes after rehabilitation (p<0.05). The non-UR group showed more prominent recovery of BBS, FAC, MBI scores (p<0.05). Conclusion Urinary retention in post-stroke patients is significantly related to the poor functional status at initial stage of rehabilitation, and also to poor recovery after rehabilitation.

기폭위치에 따른 주파수 분석

손석범 ( Seok Bum Sonand ),강추원 ( Choo Won Kang ),노영배 ( Young Bae Noh ),고진석 ( Chin Surk Go ) 대한화약발파공학회 2011 화약발파 Vol.29 No.2

발파진동이 구조물에 미치는 영향에 있어서 진동의 시간적 변화특성을 나타내는 주파수특성의 중요성이 인식되면서 최근 발파진동 영향평가에 있어서 최대진폭 외에도 진동에 수반되는 주파수 성분을 영향변수로 표현하는 방법이 점차 보편화 되어가고 있다. 이에 본 연구에서는 편마암 지역의 암석샘플을 채취하여 실내암석 실험을 실시하였고, 기폭위치에 따라 발파진동의 주파수 특성을 파악하기 위해서 단일공 시험발파를 실시하여 고속 푸리에 변환(FFT)을 통해 주주파수를 결정하고 기폭위치에 따라 어떤 변화가 있는지 분석하였다. 그 결과 기폭위치에 따른 주파수 대역에서는 정기폭은 낮은 주파수 대역, 역기폭은 높은 주파수 대역, 중간기폭은 대체로 골고루 분포됨을 알 수 있었다. 기폭위치에 따른 주파수 경향을 분석해 본 결과에서는 정기폭은 거리가 증가함에 따라서 주파수 값이 감소하였으며, 역기폭은 거리가 증가함에 따라 주파수 값이 증가함을 보였다. Frequency is a very important factor in discussing the effect on facilities such as precision instruments and therefore, in evaluating the effect of blasting vibration, it is necessary to identity information on frequency in addition to maximum amplitude of vibration. This study collected rock samples in gneiss area to perform an indoor rock test and to identify frequency of blasting vibration according to priming location, performed of single hole test blasting. Then the study decided dominant frequency through FFT and analysed changes according to priming locations. Consequently frequency range according to priming location is indicated top priming is distributed high range, bottom priming is distributed high range, middle priming is distributed evenly range. Frequency trend according to priming location is indicated distance increase with frequency discrease in top priming, distance increase with frequency increase in bottom priming.

해양관광개발을 위한 어항 활용방안에 관한 연구

김도경,손석범,정주석 경희대학교 디자인연구원 2005 예술· 디자인학연구 Vol.8 No.1

Ocean tourism is rising as a new leisure activity pattern thanks to increased income level and leisure time. Korea is surrounded by the sea on all sides but one, however, we are in beginning stage for the development of ocean tourism resource. In order to meet the demand for ocean tourism that increases yearly, a facility is needed that can satisfy various activities and desires at ocean. Especially, it would be effective to develop fishing port into ocean tourism site, as it's equipped with natural view, cultural resource and industrial facility regardless the role of fisheries base. This study, therefore, will investigate on the function and value of fishing port, and review on the advanced foreign country's cases in order to grope for utilizing fishing ports scattered in Korea into ocean tourism resource.

도시 내 복개하천 복원계획에 관한 연구 : 도림천을 중심으로

김도경,손석범 경희대학교 디자인연구원 2003 예술· 디자인학연구 Vol.6 No.1

As the urbanization continues, rivers are covered for roads and parking lots. In addition, people thought that if rivers are covered, this will improve the appearance of the street and remove terrible stench, and actively started to cover rivers. But urban rivers, which are covered for short-term benefits, ended up with urban drains and destroyed urban ecosystem. These days, other problems are continuously caused by construction of covering rivers. As public attention is being directed to the environment recently, people pay more attention to the need for the restoration of rivers. In this study, I conducted field research and took pictures while walking along Do-rim river, and studied related literature. I found out that there were many schools and reservoirs around Do-rim river. This study is intended to find out ways to secure water, which is essential to the restoration of rivers, and to suggest various methods for securing water by using the existing infrastructure such as schools and reservoirs.

Shoulder Manipulation After Distention Arthrography: Does Audible Cracking Affect Improvement in Adhesive Capsulitis? A Preliminary Study

최준규,손석범,박범준,양승남,윤준식 대한재활의학회 2015 Annals of Rehabilitation Medicine Vol.39 No.5

Objective To investigate whether an audible cracking sound during shoulder manipulation following distention arthrography is clinically significant in patients with adhesive capsulitis of the shoulder.Methods A total of 48 patients (31 women, 17 men) with primary adhesive capsulitis of the shoulder completed the study. All participants underwent C-arm–guided arthrographic distention of the glenohumeral joint with injections of a corticosteroid and normal saline. After distention, we performed flexion and abduction manipulation of the shoulder. The patients were grouped into sound and non-sound groups based on the presence or absence, respectively, of an audible cracking sound during manipulation. We assessed shoulder pain and disability based on a Numeric Rating Scale (NRS), the Shoulder Pain and Disability Index (SPADI), and passive range of motion (ROM) measurements (flexion, abduction, internal and external rotation) before the procedure and again at 3 weeks and at 6 weeks after the intervention.Results The patients were divided into two groups: 21 were included in the sound group and 27 in the non-sound group. In both groups, the results of the NRS, SPADI, and ROM assessments showed statistically significant improvements at both 3 and 6 weeks after the procedure. However, there were no significant differences between the two groups except with respect to external rotation at 6 weeks, at which time the sound group showed a significant improvement in external rotation when compared with the non-sound group (p<0.05).Conclusion These findings showed that manipulation following distention arthrography was effective in decreasing pain and increasing shoulder range of motion. In addition, the presence of an audible cracking sound during manipulation, especially on external rotation, was associated with better shoulder range of motion. Objective To investigate whether an audible cracking sound during shoulder manipulation following distention arthrography is clinically significant in patients with adhesive capsulitis of the shoulder.Methods A total of 48 patients (31 women, 17 men) with primary adhesive capsulitis of the shoulder completed the study. All participants underwent C-arm–guided arthrographic distention of the glenohumeral joint with injections of a corticosteroid and normal saline. After distention, we performed flexion and abduction manipulation of the shoulder. The patients were grouped into sound and non-sound groups based on the presence or absence, respectively, of an audible cracking sound during manipulation. We assessed shoulder pain and disability based on a Numeric Rating Scale (NRS), the Shoulder Pain and Disability Index (SPADI), and passive range of motion (ROM) measurements (flexion, abduction, internal and external rotation) before the procedure and again at 3 weeks and at 6 weeks after the intervention.Results The patients were divided into two groups: 21 were included in the sound group and 27 in the non-sound group. In both groups, the results of the NRS, SPADI, and ROM assessments showed statistically significant improvements at both 3 and 6 weeks after the procedure. However, there were no significant differences between the two groups except with respect to external rotation at 6 weeks, at which time the sound group showed a significant improvement in external rotation when compared with the non-sound group (p<0.05).Conclusion These findings showed that manipulation following distention arthrography was effective in decreasing pain and increasing shoulder range of motion. In addition, the presence of an audible cracking sound during manipulation, especially on external rotation, was associated with better shoulder range of motion.

연소촉매에 따른 추진제 특성분석

김낙현(Nak Hyun Kim),손석범(Seok Bum Son) 한국추진공학회 2018 한국추진공학회 학술대회논문집 Vol.2018 No.12