• Journal of Korean Neurosurgical Society
• /
• 제56권6호
• /
• pp.482-487
• /
• 2014

Objective : We assessed the life-time prevalence (LTP) of chronic low back pain (LBP) in young Korean males. We also evaluated the relationship between lumbar spinal lesions and their health related quality-of-life (HRQOL). Methods : A cross-sectional, self-reported survey was conducted in Korean males (aged 19-year-old) who underwent physical examinations for the conscript. We examined 3331 examinees in November 2014. We included 2411 subjects, who accepted to participate this study without any comorbidities. We interviewed using simple binary questions for their LBP experience and chronicity. HRQOL was assessed by Short-Form Health-Survey-36 (SF-36) in chronic LBP and healthy control groups. Radiological assessment was performed in chronic LBP group to determine whether there were any pathological causes of their symptoms. Results : The LTP of chronic LBP was 13.4%. Most (71.7%) of them didn't have any lumbar spinal lesions (i.e., non-specific chronic LBP). The SF-36 subscale and summary scores were significantly lower in subjects with chronic LBP. Between specific and non-specific chronic LBP group, all physical and mental subscale scores were significantly lower in specific chronic LBP group, except mental health (MH) subscale score. In MH subscale and mental component summary score, statistical significant differences didn't appear between two groups (p=0.154, 0.126). Conclusion : In Korean males 19 years of age, the LTP of chronic LBP was 13.4%, and more than two-thirds were non-specific chronic LBP. Chronic LBP had a significant impact on HRQOL. The presence of lumbar spinal pathoanatomical lesions affected mainly on the physical aspect of HRQOL. It influenced little on the mental health.

• The Journal of Asian Finance, Economics and Business
• /
• 제8권5호
• /
• pp.201-210
• /
• 2021

COVID-19 presented the world with a severe loss of life and impact, which has no geographical bounds or expected time to when its effects will subside. It has affected countries across the globe, disrupting economic levels and businesses in every industry while also altering individuals' everyday lives. The current research aims to examine the impact of coronavirus pandemic on entrepreneur's business activities and their perceptions on the difference in consumer behavior during this time. The findings reveal the pandemic negatively impacted business productivity and profits, forcing many businesses to physically close permanently. Surprisingly, female entrepreneurs do not perceive a change in consumer behavior compared to pre-COVID-19 times. Interestingly, the results indicate there is a negative impact on employees' efficiency to conduct work in which almost no research has conveyed such a finding. For this purpose, a survey was conducted with 445 responses from male and female entrepreneurs in the capital city of Riyadh, Saudi Arabia, using a simple random sample over the period of four months. Ultimately, this research will help entrepreneurs gain more knowledge and a deeper understanding of this new environment necessary to undertaking certain measures and adaptability in order to sustain their businesses during unprecedented times.

• 기본간호학회지
• /
• 제24권2호
• /
• pp.95-105
• /
• 2017

Purpose: A systematic literature review and meta-analysis were conducted to synthesis research findings on relationships of quality of life with multi-dimensional correlates in Korean breast cancer patients. Methods: For the study purpose, 18 studies were selected through a systematic process of searching the literature. Results: Among the general characteristics, variables having a significant relationship with quality of life were age (ES=.19), marital status (ES=.15), education (ES=.19), economic status (ES=.16), job status (ES=.10), and religion (ES=.13). Among the disease characteristics, type of treatment (ES=.12), length of time since diagnosis (ES=.13), stage of disease (ES=.14), length of time since operation (ES=.10), frequency of treatment (ES=.19), wound site and pain (ES=.16) were shown to have a significant relationship with quality of life. Depression (ES=-.60), one of the psychological factor, was the variable most significantly related to quality of life. Conclusion: The findings indicate that the variables which strongly impact quality of life in breast cancer patients are depression and pain.

• Pediatric Gastroenterology, Hepatology & Nutrition
• /
• 제22권3호
• /
• pp.207-216
• /
• 2019

Functional gastrointestinal disorders (FGIDs) such as infantile colic, constipation and colic occur in almost half of the infants. The aim of this paper is to provide a critical and updated review on the management of FGIDs and their impact on the health of the infant and family to health care physicians. Guidelines and expert recommendations were reviewed. FGIDs are a frequent cause of parental concern, impairment in quality of life of infants and relatives, and impose a financial burden to families, health care, and insurance. Therefore, primary management of the FGIDs should be focused on improving the infants' symptoms and quality of life of the family. If more than parental reassurance is needed, available evidence recommends nutritional advice as it is an effective strategy and most of the time devoid of adverse effects. The role of healthcare providers in reassuring parents and proposing the correct behavior and nutritional intervention by avoiding inappropriate use of medication, is essential in the management of FGIDs.

• 지역연구
• /
• 제35권2호
• /
• pp.59-71
• /
• 2019

우리나라 연평균 근로시간은 OECD 최상위 수준이다. 장시간 근로는 근로자의 생산성을 저해하고 일과 가정의 양립을 방해하는 등 삶의 질을 하락시키는 요인이 된다. 최근 정부는 시간제 일자리를 증가하는 등 유연근로제를 장려하고 있지만, 양질의 시간제 일자리가 부족한 현실이다. 시간제 근로는 일과 개인의 삶을 병행할 수 있게 하지만, 동시에 열악한 근로환경과 부정적인 사회적 시선을 보유하여 개인의 삶의 만족도에 미치는 영향이 전일제 근로와는 다를 것으로 예상된다. 특히 여성의 경우 노동시장에서 성별 격차를 경험하고 있으며, 일과 가정의 병행이라는 측면에서 시간제 근로가 삶의 만족도에 미치는 영향이 남성과 다르게 나타날 수 있다. 본 연구는 2017년도 "서울서베이 도시정책지표조사" 자료를 활용하여 근무유형-성별의 교차효과가 개인의 삶의 만족도에 미치는 영향을 순서형 로지스틱 회귀모형을 통해 실증적으로 분석하였다. 분석결과에 따르면, 삶의 만족도는 전일제 여성, 전일제 남성, 시간제 여성, 시간제 남성 순으로 높은 것으로 나타났다. 또한 시간제 여성 근로자가 낮은 삶의 만족도를 가질 확률이 가장 높은 반면, 높은 삶의 만족도를 가질 확률은 가장 낮게 나타났다. 대조적으로 전일제 남성 근로자는 낮은 삶의 만족도를 가질 확률이 가장 낮은 반면, 높은 삶의 만족도를 가질 확률은 가장 높은 것으로 나타났다.

• Journal of Biosystems Engineering
• /
• 제31권4호
• /
• pp.369-375
• /
• 2006

Mechanical properties of potato and sweet potato were measured under impact and compression loading. The test apparatus consisted of disgital storage oscilloscope and simple mechanisms which can apply compression and impact forces to potatoes and sweet potatoes. The mechanical properties could be measured while the tissues were ruptured in a very short period time less than 10 ms by impact loading. Rupture force, energy, and deformation were measured as mechanical properties of potatoes and sweet potatoes under impact and compression loading. Rupture forces under impact and compression loading were in the range of 84.1 to 93.7N and 128.9 to 132.2N for external tissues and 60.1 to 64.8N and 158.9 to 171.1N for internal tissues of potato and sweet potato, respectively. Compression speeds and drop heights for each test were in the range of 1.25 to 62.5mm/min and 8 to 24cm.

• 한국농공학회논문집
• /
• 제65권2호
• /
• pp.1-11
• /
• 2023

This study analyzed the impact of greenhouse cultivation area and groundwater level changes due to the water curtain cultivation in the greenhouse complexes. The groundwater observation data in the Miryang study area were used and classified into greenhouse and field cultivation areas to compare the groundwater impact of water curtain cultivation in the greenhouse complex. We identified the characteristics of the groundwater time series data by the terrain of the study area and selected the optimal model through time series analysis. We analyzed the time series data for each terrain's two representative groundwater observation wells. The Seasonal ARIMA model was chosen as the optimal model for riverside well, and for plain and mountain well, the ARIMA model and Seasonal ARIMA model were selected as the optimal model. A suitable prediction model is not limited to one model due to a change in a groundwater level fluctuation pattern caused by a surrounding environment change but may change over time. Therefore, it is necessary to periodically check and revise the optimal model rather than continuously applying one selected ARIMA model. Groundwater forecasting results through time series analysis can be used for sustainable groundwater resource management.

• 동아시아식생활학회지
• /
• 제20권3호
• /
• pp.473-480
• /
• 2010

This study examined the different meal duration expectations and dining characteristics of customers each stage of service (order, cook, check), and investigated the impact of perceived meal duration on customers' satisfaction. The procedures consisted of four phases. During the first phase, the different meal duration expectations and dining characteristics of customers of an Italian restaurant in Seoul were examined by survey at each stage of service. The second phase investigated the impact of perceived meal duration on customer' satisfaction. The third phase compared perceived meal duration and actual meal duration. The last phase suggested appropriate meal duration for maximization of customer' satisfaction. We also examined the effects of meal time (lunch or dinner) on meal duration preferences. Customer satisfaction was decreased with longer perceived meal duration for the order and check stages and too short perceived meal duration for the cook stage. To determine appropriate meal duration for each service stage, the relationship between perceived and actual meal durations was examined. This study confirms that customers dining at restaurants preferred a longer cook time and that a shorter meal duration at dinner decreased satisfaction ratings more when compared to lunch.

• Advances in concrete construction
• /
• 제8권1호
• /
• pp.55-64
• /
• 2019

Chloride corrosion has become the main factor of reducing the service life of reinforced concrete structures. The object of this paper is to propose a theoretical model that predicts the service life of chloride-corrosive concrete under fatigue load. In the process of modeling, the concrete is divided into two parts, microcrack and matrix. Taking the variation of mcirocrack area caused by fatigue load into account, an equation of chloride diffusion coefficient under fatigue load is established, and then the predictive model is developed based on Fick's second law. This model has an analytic solution and is reasonable in comparison to previous studies. Finally, some factors (chloride diffusion coefficient, surface chloride concentration and fatigue parameter) are analyzed to further investigate this model. The results indicate: the time to pit-to-crack transition and time to crack growth should not be neglected when predicting service life of concrete in strong corrosive condition; the type of fatigue loads also has a great impact on lifetime of concrete. In generally, this model is convenient to predict service life of chloride-corrosive concrete with different water to cement ratio, under different corrosive condition and under different types of fatigue load.

• 영재교육연구
• /
• 제23권3호
• /
• pp.315-333
• /
• 2013

본 연구의 목적은 영재학생과 일반학생의 시간관리 행동과 생활만족도를 조사하고 시간관리 행동과 생활만족도의 관계를 조사하는 것이다. 이를 위하여 경기도 소재 영재학급 중학생 104명과 중학교 일반학생 203명을 대상으로 설문조사를 실시하고 자료를 분석하였다. 본 연구에서 얻어진 결과는 다음과 같다. 첫째, 영재학생과 일반학생의 시간관리 행동은 유의미한 차이를 나타내었다. 영재학생의 시간관리 행동이 일반학생보다 유의미하게 높았다(p<.05). 영재학생은 성별에 따른 시간관리 행동에 유의미한 차이가 나타나지 않았다. 그러나 일반학생은 성별에 따라 유의미한 차이를 보였으며 여학생이 남학생보다 시간관리를 잘하는 것으로 나타났다. 이원변량분석 결과 집단과 성별 간에 유의미한 상호작용효과는 나타나지 않았다(p>.05). 둘째, 영재학생과 일반학생의 생활만족도에는 유의미한 차이가 나타났고, 영재학생이 일반학생보다 생활만족도가 유의미하게 높았다(p<.05). 영재학생과 일반학생 모두 성별에 따라 생활만족도에 유의미한 차이가 나타나지 않았으며 집단과 성별 간 상호작용 효과가 유의미하지 않았다(p>.05). 셋째, 일반학생과 영재학생의 시간관리 행동과 생활만족도 간의 상관관계를 조사한 결과 두 집단 모두에서 시간관리 행동과 생활만족도 간에 유의미한 정적 상관관계가 있음을 밝혔다. 시간관리 행동이 생활만족도에 미치는 영향을 알아보기 위하여 회귀분석을 실시한 결과 시간관리 행동이 생활만족도에 유의미하게 영향을 미친다는 결과를 얻었다.