• 한국운동역학회지
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• 제19권1호
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• pp.139-148
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• 2009

본 연구는 Thera-Band를 이용해 단축성 수축과 신장성 수축이 혼합된 저항운동을 실시하는 것이 단축성 수축 저항 운동만을 실시하는 것보다 근력증진에 더 효과적인지를 알아보고자 하는 논문이다. 연구대상자는 부산광역시 소재 S 대학교에 재학 중인 학생 30명 이었으며, 30명을 무작위로 단축성 수축과 신장성 수축 운동군, 단축성 수축 운동군, 무운동군으로 나누어 4주 동안 운동을 실시하였다. 근력 측정은 등속성 운동기기인 CON-TERX를 이용하였으며, 각속도는 $60^{\circ}$/sec, $120^{\circ}$/sec이었다. 4주 운동 후, 단축성 수축과 신장성 수축 운동군의 경우 각속도 $60^{\circ}$/sec에서 단축성과 신장성 최대 토크와 최대 파워, 각속도 $120^{\circ}$/sec에서 단축성 최대 파워가 통계적으로 유의하게 증가하였다. 반면 단축성 수축 운동군은 각속도는 $60^{\circ}$/sec와 $120^{\circ}$/sec의 최대 파워에서만 유의한 증가가 있었다. 반면 무운동군은 변화가 없었다. 따라서 Thera-Band를 이용해 단축성 수축과 신장성 수축이 혼합된 운동을 실시하는 것이 단축성 수축 운동만을 실시하는 것보다 근력증진에 더 효과적임을 알 수 있었다.

• 한방안이비인후피부과학회지
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• 제36권4호
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• pp.156-163
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• 2023

Objectives : The purpose of this study is to report the effect of Korean medical treatments on idiopathic bilateral strabismus. Methods : We treated a 43-year-old male idiopathic bilateral strabismus patient who was told to wait without a prescription as there was no problem in intraocular pressure test, fundus test, brain computed tomography, brain magnetic resonance imaging and angiography test, and cerebrospinal fluid test. The patient was admitted to Cheonan Korean medical hospital for 3 months to get Korean medical treatments including acupuncture, electroacupuncture, vapor treatment, pharmacopuncture therapy. The degree of improvement in idiopathic bilateral strabismus was determined by the objective measures of internal and external rotation disorders, and the patient's subjective opinions on eye pain and double vision discomfort. Results : The results of this patient showed distinct improvements on objective measures of internal and external rotation disorders in both eyes. Distance from the outer corner of the right eye when abducted decreased from 7mm to 0mm, and left eye decreased from 7mm to 0mm. Distance from the inner corner of the right eye when adducted decreased from 5mm to 0mm, and left eye decreased from 4mm to 0mm. In addition, eye pain decreased from 10 to 0 and diplopia decreased from 10 to 2 according to the patient's subjective opinions. Conclusions : This study shows the possibility that such medical treatment in Koreans can improve the rare idiopathic bilateral perspective among strabismus patients.

• 대한통합의학회지
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• 제12권1호
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• pp.139-150
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• 2024

Purpose : Scapular dyskinesis, it have been shown to be common in overhead athletes and has been associated with RC muscle strength. Posterior shoulder tightness (PST) has been suggested as an important factor causing scapular dyskinesis. Therefore, rehabilitation programs should focus on a posterior shoulder stretch combined with scapular stabilization exercise (PSSE) intervention. Determine the effects of posterior shoulder stretch combined with scapular stabilization exercise on the rotator cuff (RC) muscles strength, functional strength ratio (FSR), range of motion (ROM), and pain. Methods : 30 adolescent baseball players participated and subjects were allocated PSSE group (n=15) or the SSE group (n=15). Both group performed a 6-weeks intervention and measured of isokinetic peak torque/body weight (PT/BW) of concentric external rotator (CER), eccentric external rotator (EER), concentric internal rotator (CIR), eccentric internal rotator (EIR), FSR, ROM, and pain. Results : After 6 weeks PSSE, significant increase CER PT/BW (+6.02±4.76 %), EER PT/BW (+5.39±4.22 %), EER to CIR ratio (+.17±.16), and internal rotation ROM (+15.08±3.57 °). Whereas, significant decrease EIR to CER ratio (-.14±.18), external rotation ROM (-12.00±6.94 °), and GIRD (-17.41±2.84 °) compared with pre-intervention. No significant difference of isokinetic PT/BW of CIR and EER post-intervention. In the SSE group showed no significant difference all measurements for isokinetic PT/BW, FSR, and ROM post-intervention. The pain was significant improve both PSSE group (-3.25±1.60) and SSE group (-2.83±1.85) post-intervention. Conclusion : Both the PSSE and SSE interventions led to more pain relief. However, only the PSSE group showed ROM, CER, EER PT/BW, and FSR improvements. These results might suggest that the PSSE intervention is a more effective program for improving RC muscle strength and balance, in particular, concentric and eccentric ER muscle strength, FSR and can expect to prevent shoulder injuries in adolescent baseball players with scapular dyskinesis.

• 한국생산제조학회지
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• 제8권4호
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• pp.52-60
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• 1999

In this study the effect of roundness error with respect to the cutting conditions using the external cylindrical work piece by end mill cutting in a machining center was studied. the end mill used in this study is HSS coated with Ti-N which is of Ø 12-4 flutes. The material of workpiece is SM20C and cutting oil is used as a cooling flued The cutting experiments were carried out for the several cutting conditions(depth of cut height of end mill feed rate revolution per minute and cutting direction) and their roundness effects were compared using the least squares circle measuring method. The experimental results are summarized as follows : 1) The cutting depth is dominant for the roundness of a cylindrical work piece and the cutting speed must be determined precisely when the cutting depth is large 2) When the cutting direction in circular manufacturing is the same with the spindle rotation i.e up-cutting condition the surface roundness is also improved.

• 천문학회보
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• 제40권2호
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• pp.31.1-31.1
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• 2015

For probing magnetic fields in the universe, rotation measure (RM) have been often used. RM allows us to obtain the information of integrated (or averaged) magnetic fields along a line of sight (LOS). On the other hand, the new technique so-called Faraday tomography will be used in practical in the near future thanks to the wide-band polarimetry by Square kilometre Array and/or its precursors. The technique allows us to obtain so-called Faraday dispersion function (FDF). FDF is the distribution function of magnetic fields and polarized sources along a LOS. Because of this fact, it is expected that the studies of magnetic fields associated with various astronomical objects will progress dramatically. Since FDF also includes information of cosmic-rays and thermal electrons, the investigation of FDF may advance the studies of dynamics of external galaxies and/or the star formation activities. We have studied the potentials of Faraday tomography such as a tool to probe the intergalactic magnetic field associated with filaments of galaxies in the large scale structure. We have also studied the realistic FDFs of galaxies for understanding global magnetic field, cosmic-ray and thermal electrons of external galaxies. In the talk, we briefly introduce the Faraday tomography technique and report the results related to the Faraday tomography.

• Clinics in Shoulder and Elbow
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• 제1권2호
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• pp.147-153
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• 1998

Biceps tendon dislocation combined with rupture of subscapularis tendon is not a common lesion and there has been few case reported in Korea. We experienced one fifty Six years old male patient who shows typical features on physical examination and roentgenographic finding. He was injured by direct trauma on his right shoulder in adducted and external rotated position. He showed positive findings on passive external rotation test and lift-off test. On MR!, the subscpaularis tendon was totally ruptured and the biceps tendon was dislocated to anteromedial aspect of the glenoid labrum, which was typical finding. On the arthroscopic examination, the subscapularis tendon was totally ruptured from its humeral attachment and the biceps tendon was not seen in its normal anatomical position and it was dislocated antermedially to the glenoid labrum. We repaired the subscapularis tendon to humerus by use of suture anchor and the biceps tendon was relocated to its normal anatomical position in the intertubercular groove. On the post operative 6 months follow up, the patient shows improvements in his subjective symptoms and active range of motion.

• 한국강구조학회 논문집
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• 제13권6호
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• pp.715-723
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• 2001

이 논문은 T-스티프너보강된 GFT기둥-H형강보 실대형 접합부의 거동을 나타낸다. 수직요소와 수평요소로 구성된 6개 실험체의 T-스트프너는 보의 전소성모멘트에 대한 강도비를 주요변수로 하여 제작되었다. 실험을 통하여 얻은 주요 내용은 강도, 강성과 소성회전능력이다. 모든 실험체는 대체로 안정된 이력거동을 나타내었으며, 특히 수평요소는 수직요소보다 강도와 강성에 더욱더 큰 영향을 준다. 보의 소성회전성능에 있어서, 조기에 파단한 TS-2를 제외한 실험체들의 평균 보소성회전각은 2.97% rad.이다.

• 한국환경과학회지
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• 제5권1호
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• pp.15-23
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• 1996

During the last two decades, many industrial complexes for heavy and chemical industries have been established along the Korean coastline, thereby increasing the pollution materials burden on the coastal environment of seawater. Masan Bay is one of the most polluted coastal areas in Korea and the main soures of pollutants are domestic and industrial wastewater from Masan, Changwon. This study was aimed to evaluate relationships among the physicochemical parameters in the bottom water of Masan bay and to examine environmental factors affecting to pollutions of seawater by factor analysis. 'rife factor loading, 1 is showed higher increasing inclination after 1989 year in station 1. The variance of pollutant materials is showed 43.7% in which the coastal inflow water is indicated external loadings(factor 1 : NO3--N, TN, factor 4 : SiO2-Si) corresponded to domestic sewage, industrial wastewater, and earth-sands in the bottom water of Masan bay And the internal loadings(factor 2 : SS, salinity, factor 3 . W.T., DO) are explained 33.8%'corresponded the phenomena of sedimentary layer and oxygen concentration. Therefore, The external loadings are explained by the higher factor pollutantal variance in Masan bay.

• 한국전자통신학회논문지
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• 제19권2호
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• pp.437-444
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• 2024

회전형 관성항법시스템은 IMU(: Inertial Measurement Unit)를 김블 위에 장착하고 김블을 규칙적으로 회전시켜 IMU의 오차를 상쇄시킴으로써 보다 정확한 항법 정보를 제공할 수 있다. 그러나 파도에 의해 자세 변화가 생기면 회전절차의 한 주기가 끝나는 시점에 자세 오차가 0으로 상쇄되지 않게 되어 큰 위치 오차를 유발한다. 본 논문에서는 이 문제를 고려하여 항체의 롤각 정보를 기반으로 외부 김블을 회전시켜 안정화를 시키는 방법을 제안한다. 시뮬레이션을 기반으로 파도에 의한 영향을 분석하고 외부 김블 안정화의 성능을 검증한다.

• 대한관절경학회지
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• 제4권2호
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• pp.154-158
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• 2000

목적 : 정상견관절의 각기 다른 위치에 따른 관절와 상완 인대들의 해부학적 구조 변화를 관찰하고자 하였다. 대상 및 방법 : 정상 견관절 9례에 대하여 생리식염수를 주입하고 외전 및 외 회전의 위치를 달리하여(각각 $0^{\circ}$ 및 $0^{\circ},\;45^{\circ}$ 및 $25^{\circ},\;90^{\circ}$ 및 최대 외 회전) 자기공명 영상을 각각 촬영하고 이를 이용하여 3차원 영상을 재구성한 후 관절와상완 인대 특히 중 및 하 관절와 상완 인대를 관찰하였다. 결과:. 중 관절와 상완 인대는 $0^{\circ}$ 외전 및 $0^{\circ}$ 외 회전시 상완골 두의 전면 적도를 중심으로 상하부에 걸쳐 이중 곡선 모양으로 비스듬히 위치하였다가, 외전 및 외 회전이 점차 증가하여 $45^{\circ}$ 및 $25^{\circ}$에 이르면 점차 상완골 두의 전면 적도 부근에 신장되어 거의 직선에 가까운 비스듬한 주행을 보였으며, $90^{\circ}$ 외전 및 최대 외회전시 상완골 두의 전면 적도의 상부 위치에 다시 곡선 모양을 보였다. 반면 하 관절와 상완 인대는 $0^{\circ}$ 외전 및 $0^{\circ}$ 외 회전시 상완골 두의 전면 하부에서 완만한 곡선 모양으로 위치하였으며, 외전 및 외회전이 증가함에 따라 상완골 두의 전면 적도 아래에 위치하면서 아래쪽으로 볼록한 곡선 모양을 보였다가, $90^{\circ}$ 외전 및 최대 외 회전시 상완골 두의 전면 하부에 거의 직선에 가깝도록 신장되어 비스듬히 위치하였다. 결론 : 견관절을 $45^{\circ}$ 외전 및 $25^{\circ}$ 외 회전 할 때와 $90^{\circ}$ 외전 및 최대 외 회전 시 중 관절와 상완 인대 및 하 관절와 상완 인대가 각각 신장되어 관절와 상완 관절의 중요한 정적 안정화 구조물로서 작용한다고 사료된다.