• Journal of the Korean Arthroscopy Society
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• v.8 no.2
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• pp.94-97
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• 2004

Purpose: To report the results of arthroscope assisted posterior cruciate ligament reconstruction without tourniquet, which has not yet been reported in documents within the country. Materials and Methods: Out of the 75 cases of arthroscope assisted posterior cruciate ligament reconstruction on patients with posterior cruciate ligament damage from January, 1998 to May,2003 in this hospital, study was done on 49 cases of patients with isolated posterior cruciate ligament damage, excluding 16 cases of patients who were applied tourniquet in extraarticular operation due to combined damage such as in lateral collateral ligament and posterolateral collateral ligament, and 10 cases where the postoperative observation period was less than 12 months. There were 13 cases where reconstruction was done using autogenous bone-patella tendon-bone, 19 cases using allogenous bone-patella tendon-bone, and 17 cases using allogenous achilles tendon. For assessment, the 49 cases were compared using Lysholm knee scoring scale. Results: The average duration of operation was 105 minutes. There were no severe complications such as swelling, bleeding, infection etc . Assessment results attained by Lysholm knee scoring scale was 74(fair) for cases where autogenous bone-patella ten-don-bone was used,75(fair) for cases where allogenous achilles tendon was used, and 76(fair) for cases where allogenous bone-patella tendon-bone was used. Conclusion: There are no difficulties to perform the arthroscopic assisted posterior cruciate ligament reconstruction. Reconstruction without tourniquet can be thought to prevent complications that could follow when using it.

• Explosives and Blasting
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• v.33 no.1
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• pp.13-20
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• 2015

Recently, as the demand for development and utilization of underground space is increasing worldwide, the blast damaged zone has become a major issue in constructing underground structures. In this study, numerical analyses were performed for modelling a small-scale blasting of rock plates using PFC3D and ANSYS LS-DYNA. In order to verify the analysis results, several test blasts were conducted. It is concluded from the study that the numerical modelling methods well simulate the crack propagation procedure near blast holes under given conditions.

• The Journal of Engineering Geology
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• v.19 no.1
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• pp.51-61
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• 2009

Fractures and segmentation in association with the activities of the Yangsan fault are studied around Mt. Namsan, Gyengju city in the southeastern part of Korea. It is believed that the higher values of joint density and fractal dimension with the approach of the center of the Yangsan fault mean intense fracturing due to the fault activity. The boundary between fault damage zone and host rock is inferred to be placed at about 2.7 km from the center of the Yangsan fault where the values of joint density and fractal dimension abruptly decrease and the orientations of joint are also much dispersed. The small faults within the damage zone of the Yangsan fault are definitely divided into right-lateral and left-lateral strike-slip faults. The former is considered to be formed during the right-lateral movement of the Yangsan fault and the latter during the left-lateral movement. The Yangsan fault is segmented in the study area with obvious evidences as follows: (1) the difference of fault strike between northern and southern segments, (2) The geometry of contractional imbricate fans and syncline plunging $9^{\circ}$, $S85^{\circ}E$ at the end of northern segment, and (3) anticline plunging $28^{\circ}$, $N4^{\circ}W$ at the end of southern segment.

• Tunnel and Underground Space
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• v.16 no.1 s.60
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• pp.50-57
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• 2006

Development of structures such as slope and tunnel, waste disposal, oil and LPG storages, and underground power house and so on, is increasing with the year. The method for appropriate estimation of rock state such as fresh or damaged rocks is also requested with increasing structural development. On these purposes, seismic logging system, which is a simple and easy way for handling as well as small and light, has been developed. Seismic logging method is one of logging tests, which is able to evaluate the state of rock mass with various shapes and is possible to obtain the relatively accuracy data at situ state. In addition, seismic logging method is at to apply to estimate structural behavior, before and after support installed. According to the results obtained from this study, firstly, it is clear that the extent of damage in rock slope due to blasting is able to be evaluated with quantity using seismic logging method, moreover to decide the damage zone in rock slope reasonably. Secondly, it is expected that installing depth of support is able to be decided more effectively and economically, using the results of seismic logging data. Finally, seismic logging method is also able to be applied safety supervision of structures, before and after support installed.

• Journal of Chest Surgery
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• v.30 no.6
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• pp.621-624
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• 1997

Conventional surgery for lower lumbar disc herniation is a common practice and its vascular complications have been reported rarely. If the hypotension is severe or prolonged postoperatively, one should suspect vascular injury and perform urgent laparotomy. We experienced two cases of major vascular injuries following semi-laminectomy and discectomy.

• Journal of Digital Convergence
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• v.10 no.10
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• pp.415-421
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• 2012

The purposes of this thesis are to grasp the aspect of injuries by violence which is the recent social issue, analyze the relationship with socioeconomic factors and provide it as the basic material of policy development and prevention. With the specimen in-depth investigation materials of injured patients of emergency room which is injuries examination system based on medical institution, this thesis compared injuries by violence with aspect of other injuries and conducted logistic regression analysis after controlling gender, age, educational level and occupation mutually. Women showed more danger to be exposed to injuries by violence than men. The less the age was, the more danger by violence was. The more academic background was, the less rate to be exposed to violence was. For occupations, there were dangerous in order of service workers, shop and market sales workers, unemployed, elementary occupations. In conclusion, Some differences of socioeconomic factors made an effect on the danger of injuries by violence victim.

• Proceedings of the Korean Geotechical Society Conference
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• 2006.03a
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• pp.229-238
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• 2006

암반터널굴착을 위한 발파시 이로 인한 암반의 최종 손상영역을 예측하는 것은 터널의 안전성을 위해 매우 중요하다. 그러나 복잡한 발파거동은 손상영역을 적절히 예측하는데 상당한 어려움이 있다. 이러한 어려움을 효과적으로 해결하기 위해 발파하중을 응력파와 가스압으로 분리한 많은 연구가 진행되었다. 응력파는 발파공 주위에 분쇄한(crushing annulus)과 파쇄균열대(fracture zone)를 형성시키며, 상당시간 지속되는 준정적인 가스는 파쇄균열대의 닫힌 균열내부에 침투하여 균열을 다시 진행시키는 역할을 하게 된다. 즉, 가스압은 최종적으로 암반에 손상을 가하는데 기여를 한다. 따라서 본 논문은 이러한 가스압에 의해 생성되는 균열의 최종 진행 길이를 예측함으로써 발파로 인한 최종 손상영역을 간단하게 예측할 수 있는 방법을 제시하고자 한다. 이를 위해 무한 탄성평면에서 발파공 주위에 대칭으로 형성되는 균열을 모델로 사용하였다. 이 모델에서 균열이 진행할 수 있는 조건과 가스의 질량이 일정하다는 두가지 조건을 사용하였다. 그 결과 응력집중계수는 균열이 진행할수록 감소하여 최종균열의 길이를 예측할 수 있었고, 그와 동시에 발파공에 작용하는 압력도 감소하는 것을 확인할 수 있었다.

• Journal of Korean Medical classics
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• v.18 no.1 s.28
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• pp.57-66
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• 2005

통과대(通過對)${\ulcorner}$황제내경(黃帝內經)${\lrcorner}$ 중제출적여불면상관적17편경문적고찰(中提出的與不眠相關的17篇經文的考察), 진행불면원인적연구(進行不眠原因的硏究), 득출여하결논(得出如何結論): 수면화불면(睡眠和不眠), 여인체내위기적활동유관(與人體內衛氣的活動有關). 즉백주위기행어양분(卽白晝衛氣行於陽分), 고능소성(故能蘇醒); 이야만위기행어음분(而夜晩衛氣行於陰分), 칙능입수(則能入睡). 위기능구순리지출입내외, 기력양시유오장적정기제공적(其力量是由五臟的精氣提供的). 인차개괄이언(因此槪括而言), 불면적원인시음허양왕적상태(不眠的原因是陰虛陽旺的狀態). 수연불면불과시일종병증(雖然不眠不過是一種病症), 단기원인시다양적(但其原因是多樣的). 재경문중소견적원인(在經文中所見的原因), 진행개괄여하(進行槪括如下): 양기원성(陽氣元盛), 양명경실조(陽明經失調), 위중불화(胃中不和), 오장수손상(五臟受損傷), 혹인년노오장정기불족(或因年老五臟精氣不足), 인광증혹혼백비양이(因狂症或魂魄飛揚而) 치적다몽등심리장애(致的多夢等心理障碍), 비생리성수사체류(非生理性水邪滯留), 인침자오치이치적음정손상혹수사조장(因針刺誤治而致的陰精損傷或水邪助長).

• Explosives and Blasting
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• v.19 no.1
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• pp.85-92
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• 2001

본 논문에서는 암굴착시 발파에 의한 암반사면의 균열방지 및 사면안정 재고를 위하여 대 구-포항간 고속도로 건설현장에서 시험발파를 실시하고 그 결과를 분석하여 천공깊이별 안전 발파패턴을 제시하였다. 또한 현지 탄성파 속도를 측정하여 발파에 의해 암반에 미치는 균열상태를 조사한 결과 탄성파속도의 감소가 40 ∼ 53%로서 암반 중에 균열을 발생시킨 것으로 나타났다. 발파진동 계측결과를 분석하여 암반에 균열을 일으킬 수 있는 진동속도 기준을 설정하여 균열권 범위를 추정하였으며 사면의 기하학적 형상을 고려하여 손상대를 최소화 할 수 있는 적정 안전설계 패턴을 제시하였다.

• Journal of Chest Surgery
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• v.32 no.9
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• pp.844-846
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• 1999

Chronic irritation to arterial wall by foreign material may give rise to delayed vascular injury. A 50 years old male patient with kyphoscoliosis had undergone fixation of orthopedic Cotrel-Dubousset(CD) rods and screws. Fourteen months after that surgery, a false aneurysm of the descending thoracic aorta associated with pulsating hematoma in the muscular chest wall developed. The false aneurysm was managed by resecting the diseased aortic segment and replacing the vascular graft.