• 한국운동역학회지
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• 제31권1호
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• pp.1-15
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• 2021

Objective: The aim of this study was to investigate 1) the difference in static lower extremity alignment (SLEA) according to a history of lateral ankle sprain (LAS), 2) to identify SLEA factors affecting LAS, and 3) to present the cut-off value and 4) the usefulness and limitations of the SLEA measurement. Method: This case-control study recruited 88 men (age: 27.78±4.69 yrs) and 39 women (age: 24.62±4.20 yrs) subjects with and without LAS. SLEA measurement protocol included Q angle, tibiofemoral angle, genu recurvatum, rear foot (RF) angle, tibal varum and torsion, navicular drop, ankle dorsiflexion range of motion (DF ROM). Independent t-test, logistic regression and receiver operating characteristic (ROC) curve were used for statistical analysis. Results: Men with a history of LAS had significantly smaller Q angles both in standing and in supine position, while women with a history of LAS had significantly greater DF ROM in non-weight bearing (NWB; p < 0.05). Logistic regression model suggests tibial varum (OR = 0.779, p = 0.021) and WB DF ROM (OR = 1.067, p = 0.045) were associated with LAS in men. In case of women, there were no significant SLEA factors for LAS, however, ROC curve analysis revealed standing RF angle (AUC = 0.647, p = 0.028) and NWB DF ROM (AUC = 0.648, p = 0.026) could be affecting factors for LAS. Conclusion: There are differences in SLEA according to the history of LAS, furthermore, the identified items were different by sex. In case of men, tibial varum and WB DF ROM affect LAS occurrence. Standing RF angle and NWB DF ROM of women could be a predictor for LAS. However, since the sensitivity and specificity in most of the SLEA measurements are low, kinematic in dynamic tasks should be considered together for a more accurate evaluation of LAS risk.

• 대한족부족관절학회지
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• 제26권2호
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• pp.95-102
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• 2022

Purpose: This study was based on the Korean Foot and Ankle Society (KFAS) member survey and aimed to report the current trends in the management of syndesmotic injuries over the last few decades. Materials and Methods: A web-based questionnaire containing 36 questions was sent to all KFAS members in September 2021. The questions were mainly related to the preferred techniques and clinical experiences in the treatment of patients with syndesmotic injuries. Answers with a prevalence ≥50% of respondents were considered a tendency. Results: Seventy-six (13.8%) of the 550 members responded to the survey. The results showed that the most preferred method to diagnose a syndesmotic injury was magnetic resonance imaging (MRI). Intraoperatively, the external rotation stress test and the Cotton test were most frequently used to confirm syndesmotic diastasis. The reduction was usually done by a reduction clamp. One 3.5-mm screw was used most frequently over three cortices at 2~4 cm above the ankle joint. The preferred ankle position during fixation was 0° dorsiflexion. Removal of the syndesmotic screw was routinely done by most surgeons, mainly because of the limitation of movement and risk of screw breakage. Factors that affect suture button selection included non-rigid fixation which enables adequate fixation, early weight-bearing, and an infrequent need to remove the hardware. Inadequate reduction was considered the main factor that affects poor prognosis. Conclusion: This study proposes updated information about the current trends in the management of syndesmotic injuries in Korea. Consensuses in both the diagnostic and therapeutic approach to patients with syndesmotic injury were identified in this survey study. This study may raise the awareness of the various possible approaches toward the injury and should be used to further establish a standard protocol for the management of syndesmotic injuries.

• Safety and Health at Work
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• 제13권3호
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• pp.263-268
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• 2022

Health care workers (HCWs) are more than ten times more likely to be infected with coronavirus infectious disease 2019 (COVID-19) than the general population, thus demonstrating the burden of COVID-19 among HCWs. Factors that expose HCWs to a differentially high-risk of COVID-19 acquisition are important to elucidate, enable appropriate public health interventions to mitigate against high risk and reduce adverse outcomes from the infection. We conducted a systematic review and meta-analysis to summarize and critically analyze the existing evidence on SARS-CoV-2 risk factors among HCWs. With no geographical limitation, we included studies, in any country, that reported (i) the PCR laboratory diagnosis of COVID-19 as an independent variable (ii) one or more COVID-19 risk factors among HCWs with risk estimates (relative risk, odds ratio, or hazard ratio) (iii) original, quantitative study design, and published in English or Mandarian. Our initial search resulted in 470 articles overall, however, only 10 studies met the inclusion criteria for this review. Out of the 10 studies included in the review, inadequate/lack of protective personal equipment, performing tracheal intubation, and gender were the most common risk factors of COVID-19. Based on the random effects adjusted pooled relative risk, HCWs who reported the use of protective personal equipment were 29% (95% CI: 16% to 41%) less likely to test positive for COVID-19. The study also revealed that HCWs who performed tracheal intubations were 34% (95% CI: 14% to 57%) more likely to test positive for COVID-19. Interestingly, this study showed that female HCWs are at 11% higher risk (RR 1.11 95% CI 1.01-1.21) of COVID-19 than their male counterparts. This article presents initial findings from a living systematic review and meta-analysis, therefore, did not yield many studies; however, it revealed a significant insight into better understanding COVID-19 risk factors among HCWs; insights important for devising preventive strategies that protect them from this infection.

• 대한족부족관절학회지
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• 제27권2호
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• pp.49-54
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• 2023

Purpose: The present study examined the effectiveness of the preoperative ischemia-modified albumin (IMA) levels in predicting the healing period of amputation wounds in patients with diabetes mellitus following a non-traumatic below-knee amputation (BKA). Materials and Methods: This study enrolled 41 diabetic foot ulcer patients who underwent BKA at the authors' hospital diabetic foot center from April 2016 to April 2022. Among the 41 patients, 29 (70.7%) were male and 12 (29.3%) were female. Their mean age was 64.54±11.38 years (41~81 years). The mean follow-up period was 19.48±5.56 weeks (14~48 weeks) after BKA. The patients were divided into two groups (high IMA group and normal IMA group), which evaluated the healing period, wound dehiscence, and revision operation rate using a Fisher's exact test and Mann-Whitney U test. Three orthopedic surgeons performed stump wound evaluation, and they were evaluated as healing when all sutures were fused without oozing. Results: Thirty patients (73.2%) (group A) showed a high level of IMA (median: 91.2 U/mL), and 11 (26.8%) patients (group B) showed a normal range of IMA (median: 82.7 U/mL). In group A, the median period for wound healing took 1.4 weeks longer, which was significant (p=0.001). No statistical relationship was observed between wound dehiscence, revision operation rate, and IMA value. There was no correlation between the other risk factors (estimated glomerular filtration rate, HbA1c) and the wound healing period. Conclusion: Although there was a limitation in using IMA as the sole factor to predict the healing period of amputation wounds in patients after BKA, this study revealed a significant positive correlation between IMA and the period of stump healing after BKA. Therefore, the preoperative IMA levels may help predict the period of stump healing after BKA.

• 한국컴퓨터정보학회논문지
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• 제14권10호
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• pp.241-249
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• 2009

동영상 검색이나 축약과 같은 동영상 분석을 위해 동영상 어노테이션 기술이나 동영상 정보 표현에 대한 다양한 연구가 있어왔다. 이를 위해 본 논문은 대화 참여자 결점을 위한 영상적 요소와 이러한 요소를 이용하여 Character-net 표현을 개선하는 방법을 제안한다. 기존 Character-net이 자막이 뜨는 시간에 나타나는 등장인물들만을 대화참여자로 고려하므로 일부의 청자를 제외시키는 문제점이 있다. 대화 참여자는 대화상황 파악의 극히 중요한 요소로 동영상 검색 시에 기준이 될 수 있으며 동영상의 이야기 전개를 이끌어 나간다. 대화 참여자를 결정하기 위한 영상적 요소에는 자막의 유무, 장면, 인물 등장순서, 시선방향, 패턴, 입의 움직임 등이 있다. 본 논문에서는 이러한 영상적 요소에 근거하여 대화 참여자를 판단하고 동영상 표현방법인 Character-net을 개선하고자 한다. 제안한 여러 요소들이 결합되고 일정한 조건이 만족되었을 때 대화참여자를 정확히 검출할 수 있다. 따라서 본 논문에서는 대화참여자를 결정하기 위한 영상적 요소들을 제안하고 이를 통해 Character-net의 표현성능을 개선하고 실험을 통하여 제안된 방법론이 대화 참여자 판단의 정확성과 Character-net의 표현성능을 제고함을 증명하였다.

• 한국프랜차이즈경영연구
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• 제8권3호
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• pp.29-37
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• 2017

Purpose - In recent years, research has been conducted on the conflict resolution strategies of the franchise headquarters and the franchisees, but there is a lack of research on the factors of conflict due to the intrinsic structure, such as interdependence or hierarchical relationship, and behavioral analysis to reduce the conflict. In this study, we analyze the relationship between satisfaction and trust formed in the process and result of the business, and the result of action to dissolution intention. Research design, data, methodology - For these purposes, the author developed the proposed model and several hypotheses. In this model, conflict resolution strategies consist of five dimensions such as avoiding, forcing, cooperating, obliging, and compromising strategy. And, this model proposed that onflict resolution strategies are antecedents of procedure quality, behaviour quality and dissolution intention are consequences of conflict resolution strategies. The data were collected from April 1 to April 15, 2013. Because this study examined franchise industries from the franchisee perspective, we contacted franchisee store owner and managers located in Seoul and Gyeonggi Province. Interviewers trained contacted a total of 483 franchisees, and 400 franchisees responded. Out of 400 respondents, 2 respondents were deleted due to missing information. Thus, a total of 398 franchisee were used for this study. he data were analyzed using frequency analysis, confirmatory factor analysis, correlation analysis, and structural equational modeling with SPSS 24.0 and Amos 23.0 statistical program. Results - The findings can be summarized as follows: First, franchisor conflict resolution activities have significant effects on procedure quality. Second, procedure quality has a significant effect on behavior quality. Finally, behavior quality has a significant effect on dissolution intention. Conclusions - In this study, we investigated the relationship between conflict resolution behavior, procedural quality, behavior quality and dissolution intention. As a result, the franchisers should strive to resolve conflicts not only in solving simple problems with franchisees, but also in a longer term perspective. We also found that the procedural aspects of resolving conflicts should not be ignored. If the trust and satisfaction of each other increase during the process of resolving the conflict, it will positively affect the satisfaction and trust in resolving the conflict. This is also because it serves to lower the intention of termination. However, there is a limitation that it is targeted only to the restaurant franchise, and it is necessary to study the conflict resolution behavior depending on the type of conflict.

• 한국프랜차이즈경영연구
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• 제9권3호
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• pp.31-43
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• 2018

Purpose - This study examines the role of foodservice franchisee's perceived justice(distributive, procedural, and interactional) in developing long-term orientation to franchisor and investigate the mediating role of cohesiveness and relationship satisfaction in the relationship between franchisee's perceived justice and long-term orientation to franchisor. Research design, data, and methodology - We collected data from managers and owners in foodservice franchisees located in Seoul, Korea. Among a total of 500 questionnaires, 500 questionnaires were returned. After excluding 36 invalid respondent questionnaires, 496 valid questionnaires(response rate of 99.2%) were analyzed using frequency, confirmatory factor analysis, correlations analysis, and structural equation modeling with SPSS 21 and SmartPLS 3.0. Result - The findings of this study are as follows: First, distributive justice and interactional justice had positive effects on cohesiveness, but procedural justice did not. Second, distributive justice and interactional justice had positive effects on relationship satisfaction, but procedural justice did not. Third, cohesiveness and relationship satisfaction had positive effects on franchisee's long-term orientation to franchisor. Conclusions - The implications of this study are as follows. First, this study found that procedural justice can create a high cohesiveness and identification of franchisee and also maintain a cooperative relationship with the franchisor. Second, this findings suggest that the perceived distributional and interactional justice can improve the satisfaction with the franchisor and thus positively influence the intention to maintain the relationship and the intention to recontract. Third, the results of this study indicate that the cohesiveness of franchisees can play a pivotal role to improve their satisfaction with the franchisor and pursue mutual development by continuously maintaining stable business relationship with franchisor. The findings of this study are subject to at least three limitations. First, the research subject is limited to the food service franchise shops in Seoul area, so the sample was not nationally representative of the franchise stores. Second, the perceived fairness is measured only from the point of view of the franchisee, and this study has a limitation to examine the difference between the perceived franchisee's and franchisor's justice. Third, Future research needs to identify more closely the relationships between perceived fairness and long-term orientation by gathering specific quantitative data such as the renewal rate and the business performance.

• 대한토목학회논문집
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• 제26권3D호
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• pp.425-433
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• 2006

본 연구에서는 화강암 골재를 이용한 아스팔트 표층용 혼합물 및 기층용 혼합물의 동탄성계수를 평가하고, 배합설계에 사용된 데이터를 바탕으로 신뢰성이 높고, 간단한 형태의 동탄성계수 예측방정식을 개발하는 목표를 두고 있다. 기존의 마샬 배합설계가 아닌 슈퍼페이브 배합설계를 이용하여, 재료들의 기본 물성치를 정리하였다. 표층용(13mm 및 19mm)과 기층용(25mm) 밀입도 아스팔트 혼합물을 적용하였고, 국내의 대표적인 아스팔트 AP-3, AP-5 아스팔트 바인더를 이용하여 배합설계를 실시하였다. 최적아스팔트함량에 공극률 2%, 4%, 6%의 시편과 공극률 4%에 최적 아스팔트 함량에서 ${\pm}1%$의 아스팔트 함량을 이용하여 시편을 제작하였다. 5개의 다른 시험온도, -10, 5, 21, 40, $55^{\circ}C$ 및 0.05, 0.1, 1, 10, 25Hz의 5개의 하중주파수를 이용하여 일축압축 시험모드로 동탄성 계수를 평가하였다. 기존의 동탄성계수 예측용 Witczak 방정식을 표층용 및 기층용 아스팔트 혼합물 실험결과를 이용하여 국내 아스팔트 혼합물에 적용할 수 있는 수정된 예측방정식을 제안하였다. 예측방정식에 사용된 각각의 변수들에 의한 영향정도를 상호 비교 평가하였고, 제한된 실험 자료로 인해 예측방정식의 신뢰도는 약 80% 수준으로 평가되었다.

• 한국심리학회지:학교
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• 제16권2호
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• pp.89-110
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• 2019

본 연구는 학업반감에 영향을 미치는 내외적 보호 및 위험요인으로서 학습자개인, 부모, 교우, 교사 관련변인의 상대적 영향력을 검증하기 위해 실시되었다. 서울, 인천, 경기 소재 8개 고교에 재학 중인 수능 1개월 전 고등학교 3학년생 총 1,015명(여학생 57.3%)을 대상으로 상관분석 및 위계적회귀분석을 실시한 결과는 다음과 같다. 상관분석 결과, 교사학업압력은 학습자의 기본심리욕구, 교사자율성지지, 교사지지, 교우지지와 유의한 상관을 보이지 않았으며 이외의 모든 변인은 서로 유의한 상관을 보였다. 위계적회귀분석 결과, 최종적으로 학습자 개인의 유능성과 자율성, 부모의 학업적지지 및 교사의 정서적 지지는 학업반감에 대한 보호요인으로, 부모학업압력은 위험요인으로 작용하는 것으로 나타났다. 특히, 교우지지는 교사요인 투입시부터 유의한 영향력을 잃는 것으로 드러났으며, 학습자개인의 기본심리적욕구 투입시 교사의 자율성지지 효과는 사라지고 교사지지의 영향력만이 강화되는 것으로 밝혀졌다. 본 연구는 그동안 기존 연구들에서 본격적으로 다루어지지 않은 학업반감에 대해 구체적으로 밝히고 관련 변인들의 상대적 영향력을 검증하여 향후 학업반감 연구의 기초를 마련하였다는 데에 의의가 있다. 마지막으로 이에 대한 한계 및 학교상담에서의 개입전략과 관련한 함의점, 후속 연구에서의 방향성 등을 제시하였다.

• 한국음향학회지
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• 제42권6호
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• pp.559-564
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• 2023

노화 및 골다공증으로 인한 경골 또는 요골과 같은 긴 뼈의 외부 껍질을 구성하는 피질골의 골강도 변화는 골절의 위험인자로 알려져 있다. 본 연구에서는 시간역전법을 이용하여 생체 내 경골의 피질골에서 발생된 시간역전 램파의 군속도를 측정하고, 군속도가 피질골의 골강도와 밀접한 관련이 있는 cortical bone thickness(cTh) 및 cortical bone mineral density(cBMD)와 갖는 상관관계를 조사하였다. 7명의 실험대상자의 우측 경골에서 측정된 시간역전 램파의 군속도는 cTh와 r = 0.90(p < 0.0001)의 매우 높은 상관관계를 보이며, cBMD와는 r = 0.69(p < 0.0001)의 상대적으로 낮은 상관관계를 보이는 것으로 나타났다. 본 생체 내 연구의 한계점은 단지 7명의 건강한 성인으로 구성된 정상군에 대하여 시간역전 램파의 군속도가 측정되었다는 것이다. 향후 다수의 건강한 성인 및 골다공증 환자로 각각 구성된 정상군 및 골다공증군에 대한 후속연구를 통하여 시간역전 램파의 임상적 유용성이 입증된다면 골다공증 진단을 위한 정량적 초음파 기술의 신뢰도를 향상시킬 수 있을 것으로 기대된다. 또한 시간역전 램파의 군속도를 측정하기 위한 골격 부위를 경골뿐만 아니라 대퇴골 또는 요골까지 확장시킬 필요가 있다.