• International Journal of Internet, Broadcasting and Communication
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• 제13권1호
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• pp.47-53
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• 2021

Gait kinematics and kinetics have a similar tendency between men and women, yet it remains unclear how walking while carrying a load affects the gait mechanism. Twenty adults walked with preferred velocity on level ground of 20 m relative to change of a load carriage (no load, 15%, 30% of the body weights) aimed to observe gait mechanism. We measured gait posture using the three-dimensional image analysis and ground reaction force system during stance phase on left foot. In main effect of gender difference, men showed increased displacement of center of gravity (COG) compared to women, and it showed more extended joint angle of hip and knee in sagittal plane. In main effect of a load difference, knee joint showed more flexed postuel relative to increase of load carriage. In main effect of load difference on the kinetic variables, medial-lateral force, anterior-posterior force (1st breaking, 2nd propulsive), vertical force, center of pressure (COP) area, leg stiffness, and whole body stiffness showed more increased values relative to increase of load carriage. Also, men showed more increased COP area compared to women. Interaction showed in the 1st anterior-posterior force, and as a result of one-way variance analysis, it was found that a load main effect had a greater influence on the increase in the magnitude of the braking force than the gender. The data in this study explains that women require little kinematic alteration compared to men, while men in more stiff posture accommodate an added load compared to women during gait. Additionally, it suggests that dynamic stability is maintained by adopting different gait strategies relative to gender and load difference.

• 한국운동역학회지
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• 제18권1호
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• pp.159-168
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• 2008

본 연구는 피겨스케이팅의 여자국가대표 선수 4명으로부터 고난도 스핀기술인 FSS과 FCS동작을 분석하였다. 이를 위하여 자세유형에 따른 스핀동작 간 족저압력변인 접지면적(CA), 최대힘(MF), 최대압력(PP) 그리고 인체무게중심(COG)에 의한 발바닥 9개 영역을 중심으로 압력변화를 고찰하였다. 본 회전구간에서 두 스핀기술 간 접지면적이 17.2%의 차이로 스핀축이 한 곳에 보다 잘 집중된 경우는 FCS인것으로 나타났다. 최대힘에서 FSS는 97%BW, FCS는 143%BW로서 20% 높았으며, 최대압력 또한 FCS가 FSS보다 20% 높은 수치를 보였다. 이러한 결과는 인체무게중심선과 압력중심점과의 상호관계로부터 FSS의 압력중심점이 인체무게중심선보다 발바닥 후면, 반대로 FCS는 발바닥 앞면에 위치하는 자세패턴에 의한 기능적 차이로 분석되었다. 위의 결과로부터 FCS가 상대적으로 FSS보다 스핀기술 시 높은 인체중심과 하지말단을 이용한 큰 회전반경으로부터 스핀속도를 보다 잘 통제하는 운동구조로 고찰되었다.

• 대한한방소아과학회지
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• 제12권1호
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• pp.183-210
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• 1998

Cheonggisan(CGS) is well known for its effect on such allergic disease as urticaria and atopic dermatitis. Gagamcheonggisan(GCGS) was formulated by subtracting several herbs from CGS and adding several herbs to CGS. Even though it is being used frequently in the clinicai medicine for the treatment of above hypersensitivity diseases, basic study to make sure the mechanism of its action is rare. In this study the author tried to know the effect of CGS and GCGS on the vascular permeability, contact dermatitis, granular secretion from mast cells and function of macrophages. The results obtained in this study are as follows : 1. Administration of CGS and GCGS decreased the vascular permeability induced by serotonin and histamine. The decrease by serotonin is more typical and dose-dependent. 2. Administration of CGS and GCGS inhibited foot-pad and ear swelling responses induced by sheep red blood cells and picryl chloride respectively, the inhibition of foot-pad swelling responses is bigger than that of ear swelling responses and both of them are not dependent on the dose3. Treatment of peritoneal mast cells with CGS and GCGS water extract decreased the histamine release triggered by compound 48／80 in a dose dependent fashion 4. Administration of CGS and GCGS increased the phagocvtic activity of peritoneal macrophages and treatment of peritoneal macrophages with CGS activated phagocytic function in a dose dependent fashion. 5. Administration of CGS and GCGS enhanced such reactive oxygen intermediates(ROIs) as superoxide and hydrogen peroxide production from peritoneal macrophages. 6. Treatment of CGS and GCGS activated peritoneal macrophages for the production of ROIs. The above results show that CGS and GCGS decreased the hypersensitivity reactions by inhibiting non-specific inflammatory mediator release and vascular permeability without affecting general immune responsiveness.

• 대한족부족관절학회지
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• 제14권2호
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• pp.157-160
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• 2010

Purpose: The purpose of this study is to find out the correlation factors for prognosis of calcaneal fractures. Materials and Methods: 120 cases (feet) of calcaneal fractures, all of them followed up for more than 1 year after surgical procedures, consisted of 101 men (105 feet) and 13 women (15 feet) were reviewed retrospectively. The collected clinical data were as follows : injury mechanism, surgical procedures, time to procedure, time to work and the radiologic data: Bohler angle, heel width, displacement of posterior facet. AOFAS hindfoot score and VAS score were checked. With ANOVA test and multiple regression analysis, the data processed statistically. Results: According Sanders classification, type II was 37 cases (31%), type III 66 cases (55%), and type IV 17 cases (14%). On plane radiography, the Bohler angle improved to average 28.4 degree from 5.6 degree, and the displacement of posterior facet was corrected to average 1.2 mm. AOFAS hindfoot score was checked average 81.7 points postoperatively, and the meaningful difference existed between types of Sanders classification. The Bohler angle represented the outline of the calcaneus had the better correlation with the clinical outcome of calcaneal fractures rather than the anatomical reduction of the posterior facet did. And the width of calcaneus had good correlation with the clinical score. Conclusion: We should also concern about the outline of calcaneus, the width of calcaneus and the Bohler angle representing anatomical reduction, not only the acute reduction of the posterior facet.

• 대한족부족관절학회지
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• 제3권1호
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• pp.40-48
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• 1999

The neck of the talus is its most vulnerable and fragile segment, because of narrow diameter, devoid of hyaline padding and honeycombed internally by vascular channels etc. Talar neck fractures comprise 50% of all major to the talus. The majority occurs as a result of high-energy injuries, such as motor vehicle accidents or fall from a height. Anatomically, talar surface is covered mainly with articular cartilage and blood supply to the talus is very poor. So, complications, such as non-union, avascular necrosis and post traumatic arthritis, are frequent. The authors reviewed fourteen cases of talar neck fractures treated in our clinics from Jan. 1992 to Mar. 1997, and average follow-up period was over 15 months. The results obtained were as follows; 1. Patients' average age was 31.2 years. 2. The most common cause was traffic accident(9/14, 64%), and hyperdorsiflexion injury of the ankle was common mechanism of the fractures. 3. According to the modified Hawkins classification, type I was four cases, type II was nine cases, type III was one case and type IV was no case. 4. Hawkins sign of subcortical radiolucency was found in 64% (9/14) of the fractures. 5. Avascular necrosis was occurred in 21% (3/14) of the fractures(in two cases of type II fractures, and in one of type III). 6. According to the Hawkins criteria, four cases in type I, five in type II were an excellent result. Two cases, one in type II and one in type III were good result, and two in type II were fair. One in type II was poor result.

• 대한족부족관절학회지
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• 제2권2호
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• pp.76-81
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• 1998

Chiefly, painful heel syndrome is observed at old age. Many possible reasons were bursitis, plantar fasciitis, calcaneal periostitis around the calcaneus and achilles tendon. But the exact cause was not clearly identified due to complexity of subcalcaneal pain mechanism. The incidence of calcaneal spur and overweight were significant in painful heel syndrome. Our purpose of this study was analysis of underlyng cause and correlation about bony spur and overweight in painful heel syndrome. The author used incidence of heel spur on painful heel syndrome and body mass index to evaluate overweight. The material is 55 cases of painful heel syndrome patients and 60 cases of control group. Bony spur was one of the cause of painful heel syndrome. Body weight and calcaneal spur was developing factors on painful heel syndrome. And the result was as follows. 1. Spur formation incidence is 35 cases (63.6 %) in painful heel syndrome, 8 cases (13.3%) in normal control group. So, patient's group is significantly high (p<0.01). 2. Body mass index is 26.48 in painful heel syndromes, 21.75 in normal control groups. Overweight above index 27 is 22 cases (40%) in painful heel syndromes, 3 cases (5%) m normal control groups. So, patient's group is significantly high (p<0.01). 3. In painful heel syndrome, tenderness site is 46 cases (83.6%) in medial calcaneal tuberosity, 4 cases (7.3%) in central calcaneal tuberosity, 1 cases (1.8%) in both site. 4. Underlying causes of painful heel syndrome is 19 cases (34.5%) in plantar fasciitis, 16 cases (29.1%) in calcaneal periostitis, 11 cases (20%) in bursitis, 4 cases (7.3%) in tendinitis, 2 cases (3.6%) in entrapment neuropathy.

• 한국동물학회지
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• 제38권3호
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• pp.433-441
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• 1995

염소 베타-락토글로불린 유전자 프로모터의 유선 조직 특이성은, 비 발현 세포에서 -470 에서 -205 부위에 의해서 매개되는 억제 조절에 의해서 보증된다. 이 음성 조절 기작과 억제 조절을 매개하는 인자를 확인하기 위하여 상류 염기 서열을 자세히 분석하였다. 상류 염기 서열은 어느 방향으로 위치하든 연결된 베타-락토글로불린 유전자 프로모터의 활성을 억제할 수 있었다. 이와 같이 규명된 염소 베타-락토글로불린 유전자의 잠정적 음성 조절 인자는 다른 유전자의 프로모터들에 대해서는 다양한 활성을 보였는데, herpes simplex 바이러스의 thimidine kinase 프로모터는 상류 염기서열의 방향에 따라 억제 또는 활성화되었으며, SV40 프로모터는 억제되기보다는 오히려 활성화되었다. 염소 베타-락토글로불린 유전자의 억제 조절 인자를 포함하는 조절 부위는 비 유선 세포인 HeLa 및 CV-1 세포에서 추출된 핵 추출물에 의해서 이동성이 강력하게 지연되는 반면, 유선세포인 HC11 세포의 핵 추출물에 의해서는 약하게 지연되었다. 이와 같은 활성 억제와 인자 결합간의 연관성은 foot-printing 분석에서 관찰된 결합 부위가 염소의 베타-락토글로불린 유전자의 조직특이적 억제에 작용할 음성 조절 인자일 가능성을 시사한다.

• 대한족부족관절학회지
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• 제22권3호
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• pp.95-99
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• 2018

Purpose: The purpose of this study was to evaluate the radiologic outcomes of distal fibular fractures and to analyze the risk factors associated with nonunion. Materials and Methods: Between January 2009 and March 2016, 13 patients who had final nonunion with ankle fracture were included. In the control group, 370 patients who had undergone bony union and removed metal implants were included. All patients underwent the same surgical procedure and had the same treatment method, ultimately achieving satisfactory open reduction results with less than 2 mm fracture gap. Surgical treatment of fracture was considered to have the same effect on nonunion, and factors that might be associated with nonunion were evaluated. SPSS ver. 13.0 (SPSS Inc., USA) was used for all statistical analyses. Pearson's chi-square test and multi-variate regression analysis were performed to determine the factors affecting nonunion of distal fibular fracture. A p-value less than 0.05 was considered statistically significant, and relative risk was assessed. Results: The mean age of 13 patients was 46.9 years (range, 16~57 years); there were 8 men and 5 women. Among the 13 patients with nonunion, atrophic was the most common (12 cases). The association between the injury mechanism and the Lauge-Hansen classification and diabetes mellitus was not statistically significant. Distal fibular fractures with tibia shaft fracture (p=0.015) and Danis-Weber type C fracture (p=0.023), open fracture (p=0.011), and smoking (p=0.023) were significantly associated with nonunion. Conclusion: In this study, the combined injury of the ipsilateral tibia shaft fracture, open fracture, and Danis-Weber type C fracture may increase the possibility of nonunion. Therefore, caution is advised to prevent nonunion.

• 대한한방소아과학회지
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• 제18권1호
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• pp.1-9
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• 2004

Objectives: The purpose of this study was clinical review of pediatric patients with fracture that visited oriental medicine center. Methods: In retrospective study, the pediatric patients, who were visited to oriental medicine center due to fracture, were classified by sex, age, fracture site, date of accident, injury mechanism, time of treatment, kind of treatment. Results and Conclusion: Total 32 patients were visited due to fracture from April 2001 to March 2004. Male Patients were 27, female were 5. In distribution of age, 10 year-old and 11 year-old were 40.7% of totality. In distribution of month, May was 10(31.3%), June was 6(18.8%), and March was 4(12.5%). There are more patients with fracture in spring than other season. In distribution of fracture site, foot was 15(46.9%), hand was 7(21.9%), ankle was 4(12.5%), upper extremity was 3(9.4%), clavicle was 2(6.3%), tibia was 1(3.1%). In distribution of injury mechanism, slip down was 23(71.9%), impaction 5(15.6%), fall down 3(19.4%), crushing injury 1(13.1%). In distribution of injury motive, soccer was 8(25.0%), basketball 4(12.5%), skating 3(9.4%), cycling 2(6.3%), sliding 1(3.1%), Tae-kwon-do 1(3.1%), other sports 5(15.6%), collision 1(3.1%), walking 2(6.3%), hit 3(9.4%), etc. 2(6.3%). In distribution of treatment account, one time was 23(71.9%), twice 3(9.4%), three times 2(6.3%), four times 2(6.3%), five times 2(6.3%). In distribution of treatment time, 1 week was 26(81.3%), 2 weeks 4(12.5%), 3 weeks 2(6.3%). In distribution of treatment kind, acupuncture treatment was 18(56.3%), negative cupping 7(21.9%), splint 13(40.6%), and other treatment(coban taping, medical patch, and so on) 5(15.6%), transfer 14(43.8%).

• 대한기계학회논문집A
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• 제34권9호
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• pp.1145-1151
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• 2010

본 논문은 형상기억합금 와이어에 의해 구동되는 점핑로봇에 대한 연구로서 기구의 설계와 컴퓨터 시뮬레이션을 포함하고 있다. 인간과 같은 척추동물 하지 근골격계의 구조와 기능을 모방한 구조의 점핑 기구를 설계하였다. 점핑 기구의 각 다리는 대퇴부, 정강이, 발의 세 부분으로 구성되고, 점핑에 필수적인 단일관절근육인 대둔근, 양관절근육인 대퇴직근과 비복근을 포함하는 구조이다. 각 근육을 형상기억합금 와이어로 대체한 컴퓨터 모델로 시뮬레이션한 결과, 로봇의 최대 점핑 높이가 로봇 신장의 약 4 배임을 확인하였다. 또한 구조가 보다 단순화된 로봇 모델과 점핑 성능을 비교하였고, 그 결과 근골격계를 모방한 모델이 점핑 높이 면에서 3.3 배 우수한 것으로 나타났다. 이러한 컴퓨터 시뮬레이션을 통하여 형상기억합금이 소형 점핑로봇의 작동기로 사용하기에 적합함을 확인하였다.