테니스 포핸드 스트로크 시 왼팔의 이용 유무가 스트로크의 정확성에 미치는 영향

우상연,최성범,김호묵 순천향대학교 기초과학연구소 2011 순천향자연과학연구 논문집 Vol.17 No.1

The purpose of this study is to analyze and compare accuracy and kinematic characteristics of forehand strokes upon using the left-hand and non the using left hand in tennis. Six unskilled collegiate players who complied primary tennis course participated in this study. Subjects were requested to hit 10 balls with 4 types each: first, it was two directions(down the line, cross), second, it was two velocities(slow ball, fast ball) and then it was type of using left hand. Variables such as accuracy, time, distance, angle and velocity variables were measured by USPTA method and video cameras. The results of this study are as follows: 1) accuracy of hitting balls was not different according to the type of using left hand. While there was an interaction between ball velocity and hitting direction. 2) impact positions of hitting ball were not different according to the type of using left hand. While impact positions were done near by target direction in cross direction then down the line direction. 3) shoulder rotation angle was not different according to the type of using left hand. While shoulder rotation angle was grater in down the line direction than cross direction. 4) the maximum velocity of racket head was faster in using left hand than non using left hand.

經濟開放化 程度와 財政 金隆政策의 效果

成範鎔 홍익대학교 경제연구소 1989 經濟硏究 Vol.5 No.-

공동주택 유지관리 FCI 모니터링에 관한 연구

범성우,정영한,박태근 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

After the 1980' s governmental housing business policy was vigorously attained, demand of apartment housing is still on the increase, but systematic maintenance is not following this current incerase trend. A promotion about the realization on the importance of maintenance due to life-time degradation of apartment housing and a plan of life-long practice of maintenance established together with longterm stratergy for maintance upkeep must be imperative. Purpose of this study presents application plan about FCI from rifle cycle viewpoint of building. Expect that is used laying plan that is middle part of a song miracle in actuality and expense arbor in the mountains of longtimer line plan of apartment house. As administration subject establishes well-timed repair time and more strategic budget, may behave better maintenance.

Effect of short-term combinatorial application of flurbiprofen plaster and wrist extensor taping on pain while carrying out a badminton technique in badminton athletes with chronic wrist pain: Case study

주성범 남서울대학교 2018 남서울대학교 논문집 Vol.24 No.-

노인체육지도자 자격연수과정 평가 분석

주성범 남서울대학교 출판국 2014 남서울대학교 논문집 Vol.20 No.1-2

This study in intended to evaluate and analyze with the qualification training course of sport & exercise leader for elder. The course is provided to 45 persons engaged in jobs relating to the improvement in elders' health. And 100-hour theoretical and practical qualification training course had progressed for 10 weeks. After that time, a survey was conducted for the evaluation and value analysis of qualification training course. It was possible to know the positive evaluation and high satisfaction of this qualification training course of sport & exercise for elder through whether the course was completed, whether the certificate was obtained, whether other people would be invited to participate and whether they would participate in the intensive course. Besides, it was possible to check information about a program preferred by participants.

재발성 호흡기 유두종증의 임상양상과 보조 치료의 유용성

성명훈,최병윤,진정욱,성원진,박범정,노종렬,김대우,원태빈,김광현 대한이비인후과학회 2001 대한이비인후과학회지 두경부외과학 Vol.44 No.12

All-in-one 접착제에서 초음파진동이 법랑질과 상아질의 결합강도와 레진침투에 미치는 영향

이범의,장기택,이상훈,김종철,한세현 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.1

초기의 접착 시스템은 여러 단계의 술식을 필요로 하였으며 술자의 기술과 재료의 성질에 크게 좌우되었으나 최근 산부식, priming, adhesive를 한번에 적용할 수 있는 a11-in-one adhesive system이 등장하였다. 치과에서의 vibration의 이용은 치석의 제거 및 접착제의 점도를 낮추는데 이용되어왔으며 vibration은 접착제의 흐름성을 향상시켜 film thickness를 낮추어 수복물 주위의 미세누출을 줄이는데 도움을 준다. 이에 저자들은 all-in-one adhesive system에서 vibration이 법랑질과 상아질의 접착강도와 레진침투에 미치는 효과를 알아보고자 하였다. 법랑질 시편은 발거 후 실온에서 0.1% thymol 용액에서 보관된 30개의 건전한 사람의 대구치를 무작위로 10개씩 세군으로 나누고 근원심 방향으로 두 부분으로 분리하여 각각은 같은 접착제를 사용하고 초음파진동여부를 다르게 하였고, 아크릴 레진을 이용하여 직경 1-inch의 PVC관에 매몰한 후 협설면이 아크릴봉과 동일한 높이가 되도록 220-, 600-grit 연마지로 순차적으로 연마하였고 군당 10개씩 여섯 군으로 분류하였다. 1군과 2군은 Prompt L-Pop(3M-ESPE, Seefeld, Germany), 3군과 4군은 One-Up Bond F(Tokuyama Corp., Tokyo, Japan). 5군과 6군은 AQ bond(Sun Medical Co., Kyoto, Japan)를 제조사의 지시에 따라 도포하였다. 2군, 4군, 6군은 초음파 치석제거기를 이용하여 치면에 대고 15초간 진동을 가한 후 광중합하였다. 상아질 시편은 치관부 법랑질을 제거한 후 상아질면을 아크릴 봉과 동일한 높이가 되도록 하고 법랑질 시편과 동일하게 처리하였다. 이후 직경 2mm, 높이 3mm의 Teflon mold(Ultradent, U.S.A.)를 이용하여 복합레진을 충전한 후 40초씩 두 번에 나누어 광중합한 후 24시간동안 실온에서 증류수에 보관하였다. 열순환 시행한 후, 만능측정 기(Instron4465)로 전단결합강도를 측정하였으며 Resin tag의 양상을 비교하기 위해 각 군의 시편의 치질을 완전히 용해 시킨 후 표면을 주사전자현미경사진으로 관찰하여 다음과 같은 결과를 얻었다. 1. 법랑질에서 초음파 진동을 가한 군(2,4,6군)은 가하지 않은 군(1,3,5군)에 비해 평균 전단결합강도가 높게 나타났다. 그 차이는 AQ bond 군을 제외하고 통계적으로 유의하였다(p<0.05). 2. 상아질에서 초음파 진동을 가한 군(2,4,6군)은 가하지 않은 군(1,3,5군)에 비해 평균 전단결합강도가 높게 나타났다. 그러나 그 차이는 One-Up Bond F군을 제외하고는 통계적으로 유의한 차이가 없었다. 3. 전자 현미경 관찰에서 초음파 진동을 가한 군에서 더 많은 법랑질의 소실과 상아질에서 resin tag의 길이가 길었고 lateral branch의 수도 많이 관찰되었다. The objective of this study was to apply the vibration technique to reduce the viscosity of bonding adhesives and thereby compare the bond strength and resin penetration in enamel and dentin achieved with those gained using the conventional technique and vibration technique. For enamel specimens, thirty teeth were sectioned mesio-distally. Sectioned two parts were assigned to same adhesive system but different treatment(vibration vs non-vibration) Each specimen was embedded in 1-inch inner diameter PVC pipe with a acrylic resin. The buccal and lingual surfaces were placed so that the tooth and the embedding medium were at the same level. The samples were subsequently polished silicon carbide abrasive papers. Each adhesive system was applied according to its manufacture's instruction. Vibration groups were additionally nitrated for 15 seconds before curing. For dentin specimen, except removing the coronal part and placing occlusal surface at the mold level, the remaining procedures were same as enamel specimen. Resin composite(Z250 3M. U.S.A.) was condensed on to the prepared surface in two increments using a mold kit(Ultradent Inc., U.S.A.) Each increments was light cured for 40 seconds. After 24 hours in tap water at room temperature, the specimens were thermocycled for 1000cycles.. Shear bond strengths were measured with a universal testing machine(Instron 4465, England). To investigate infiltration patterns of adhesive materials, the surface of specimens was examined with scanning electron microscope. The results were as follows : 1. In enamel, the mean values of shear bond strengths in vibration groups(group 2,4,6) were greater than those of non-vibration group(group 1,3,5). The differences were statistically significant except AQ bond group. 2. In dentin, the mean values of shear bond strengths in vibration groups(group 2 4, 6) were greater than those of non-vibration groups(group 1,3,5). But the differences were not statistically significant except One-up Bond F group. 3. The vibration group showed more mineral loss in enamel and longer resin tag and greater number of lateral branches in dentin under SEM examination.

다발성 외상 후 횡문근융해증 환자에서의 손상초기 급성신부전의 예측인자

문중범,이강현,황성오,이진웅,한병근,최승옥,강성준 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Background: Acute renal failure(ARF) is a serious complication of rhabdomyolysis after multiple trauma, and may increase morbidity and mortality. The aim of this study was to elucidate predicting factors for the development of ARF induced by rhabdomyolysis at an early stage of multiple trauma. Methods: This prospective, observational study was conducted at the emergency department of a level I trauma center. Patients with acute multiple trauma, whose plasma levels of creatine phosphokinase(CPK) were higher than 1,000 IU, were included in this study. We excluded patients with any history of myocardial infarction, stroke, underlying renal disease, and/or infectious disease. We collected clinical and laboratory data including age, heart rate, mean arterial blood pressure, injury severity score, serum myoglobin, lactic dehydrogenase, creating phosphokinase, and base excess. Collected data were compared between patients who had ARF and patients who did not have ARF. Results: Eighty-eight patients were enrolled in this study. Eighteen patients(20.5%) developed ARF. The injury severity score(ISS)(p=0.001), the base excess(p<0.001), CPK(p=0.003), and myoglobin(p<0.001) were higher in patients with ARF than in patient without ARF. Logistic regression analysis revealed that early predictors for ARF were high ISS, high base excess, high CPK, and high myoglobin. Conclusion: We could identify early predicting factors for acute renal failure induced by rhabdomyolysis, these factors included ISS, serum CPK and myoglobin, and base excess in the arterial blood gas analysis performed at the emergency department.

PIV계측에 의한 충돌제트에서 사각 난류촉진체 주변의 유동특성 연구

李相範,孫承佑,宋旼根,朱恩選 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-

The objective of this study is to investigate characteristics of flow by the square turbulence promoter and the selection of a proper impinging distance. The promoter was set up vertically to the way of a nozzle exit flow, each pitch fixed to be 30㎜ and the measurement region divided by 4 section(A, B, C, D). The characteristics of flow field were investigated in each case of the distance rate from the nozzle exit to impinging plate(H/B=4, 6, 8, 10) changing nozzle exit diameter(Ψ10, 17, 23) and Re=4,000. As the experimental result by using PIV measurement at Ψ17 and H/B=6 in the free jet, the turbulence intensity showed a big strength at A section, a decreasing of 20.1% at B section, an increasing of 10% at C section and an increasing of 10.9% at D section. On the other side, when the square turbulent promoter set up, The flow showed a tendency with the free jet at A section, a decreasing of 16.2% at B section, a decreasing of 1.5% at C section and an increasing of 8.3% at D section, It has been shown that for enhancing the turbulence intensity are the case of Ψ17 and H/B=8 in the B section is the propel condition.

Melatonin이 수면에 미치는 영향

박철범,왕성근 대한생물치료정신의학회 1999 생물치료정신의학 Vol.5 No.2

OBJECTIVES : Author tried to evaluate the hypnotic effect of melatonin and melatonin induced daytime sleepiness and to identify the cumulative effect of short-term administration of melatonin for 3 successive days, and remaining effect after discontinuation. INTERVENTION : Subjects visited our laboratory by 08:00 at the first day, and they had baseline MSLT (from 10:00 to 22:00 at 2 hours' interval) while they had 7 naps during the day. Each time, the subjects completed SSS and RT before they underwent an MSLT to evaluate their sleepiness and to evaluate their performance. Next day, 6mg of melatonin was administered to healthy young males at 09:00 hour, and the concurrent effects on sleep latency, daytime sleepiness and reaction time were recorded. PARTICIPANTS : Sixteen healthy, normal young male college students participated in this study. Participating subjects were in good physical and psychological health and were asymptomatic as to sleep/wake complaintsRESULT : The result were summarized as follows.1. As compared to baseline, the hypnotic effect of melatonin appeared within 1 hour, and the effect continued over 7 hours. Sleep latency was normal range on the day of discontinuation. 2. Subjects had significantly more subjective daytime sleepiness after melatonin administration. Melatonin induced daytime sleepiness appeared within 3 hour after adminisration, and the condition continued over 7 hours.3. Compared to baselines, there was no effect on reaction time.4. The longer the reaction time of second drug administration day, the longer the reaction time of third drug administration day.