• 한국노년학
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• v.31 no.3
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• pp.591-606
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• 2011

The purpose of this study was to propose basis data to nursing intervention development in order to raise the professional consciousness of long-term care workers grasping influence factor and professional consciousness. The subjects were about 185 long-term care workers at D megalopolis and 4 cities of 3 provinces from November to December, 2009. The data were analyzed using the SPSS program for descriptive statistics, t-test, ANOVA, Pearson's correlation coefficients and multiple regression. The correlated factors of professional consciousness included self-efficacy(r=.420, p=.000), sense of the calling(r=.636, p=.000), education training effectiveness(r=.441, p=.000), internal locus control(r=.378, p=.000), and external locus control(r=-.356, p=.000). Factors influencing of professional consciousness of them were to show in order of sense of the calling(B=.329, p=.000), education training effectiveness(B=.250, p=.000), internal locus control(B=.216, p=.000), external locus control (B=-.165, p=.002), consideration and opplicable job choose characteristic(B=.207, p=.004), these variables accounted for 57.5% of the variance of professional consciousness. Further research needs to develop well organized educational program, training of enhancing internal locus control, and clear examination about roles and tasks of long-term care workers. Also, it suggests education and research that can enhance professional consciousness by utilizing these factors.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.503-503
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• 2017

대부분의 자연하천에서 유량조사는 하천 횡단면의 유속을 측정하여 수위-유량관계로부터 유량을 산정하고 있다. 유속의 측정은 통상적으로 횡단면을 일정 구간으로 구분하여 회전식, 전자식 유속계, 부자 등과 같은 접촉식 장비를 이용하여 일차원 유속으로부터 구간을 대표하는 평균유속을 기반으로 유량을 산정하고 있다. 그러나 이런 접촉식 장비를 통한 유속 측정은 인력, 장비, 비용 및 돌발 호우사상의 측정자의 안전 등 현장 조건의 한계로 관측자료를 확보하지 못 하는 미측정 영역이 발생한다. 이에 따라 수위와 유량측정성과로 개발된 수위-유량관계곡선식은 미측정 구간인 외삽구간에서 정확도가 낮은 유량자료가 산정될 수 있다. 이에 따라 본 연구에서는 하천 횡단면의 일부 고정된 지점에서 측정된 표면유속을 이용하여 유량규모에 따른 평균유속의 상관관계를 분석하고 수위-유량관계곡선으로 산정된 유량과 비교함으로써 비접촉식 유속 측정방식을 통한 유량산정의 활용성과 적용성을 검토하였다. 이를 통해 표면유속을 활용한 유량산정의 실무적인 방법론을 제시하고 고수위 외삽구간의 유량을 비교 및 검증하였으며 수위 1.23m 이상에서 표면유속(0.62m/s ~ 2.69m/s)과 평균유속의 관계는 구간별로 일정한 선형관계가 나타났으며 각 구간에 대한 상관계수는 $R^2=0.97$ 이상으로 높게 나타났다. 이상의 결과는 비접촉식 표면유속측정으로 홍수기 중고수위 이상에서 접촉식 유속계가 갖는 한계를 보완하여 연속적인 유량생산이 가능하고 개발된 수위-유량관계곡선식의 외삽구간을 검토할 수 있는 참고자료를 획득하여 고수위 유량자료의 신뢰성을 높일 수 있는 것으로 판단된다.

• Journal of Chest Surgery
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• v.29 no.8
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• pp.897-904
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• 1996

A preoperative prediction of postoperative pulmonary function after the pulmonary resection should be made to prevent serious complications and postoperative mortality. There are several methods to predict postoperative lung function but the 99m7c-MAA perfusion lung scan is known as simple, inexpensive and easily tolerated method for patients. We studied the accuracy of the perfusion lung scan in predicting postoperative lung function on 34 patients who received either the resection of one lobe(17 patients) or 2 lobes(2 patients) or pneumonictomy(15 patients). We performed pulmonary function test and lung scan immediately before the operation and calculated the postoperative lung function by substracting the regional lung function which will be rejected. We compared this predictive value to the observed pulmonary function which was done 20 days after the surgery. We also compared the data achieved from 12 patients ho received open thoracotomy due to intrathoracic disease that are not confined in the lung. The correlation coefficient between the predicted value and observed value of FEVI .0 was 0.423, FVC was 0.557 in the pneumonectomy group and FEVI . 0 was 0.693, FVC was 0.591 in the lobectomy group. The correlation coefnclent between the'postoperative value and preoperative value of FEVI .0 was 0.528, FVC was 0.502 in the resectional group and FEVI .0 was 0.871, FVC was 0.896 in the comparatives. We concluded that the perfusion lung scan is accllrate in predicting post-resectional pulmonary function.

• Journal of Korea Water Resources Association
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• v.43 no.5
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• pp.471-482
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• 2010

Rainfall events in the hydrologic circulation are closely related with various meteorological factors. Therefore, in this research, correlation relationship was analyzed between sea surface temperature of typical meteorological factor and monthly rainfall on Korean peninsula. The cluster analysis was performed monthly average rainfall data, longitude and latitude observed by rainfall observatory in Korea. Results from cluster analysis using monthly rainfall data in South Korea were divided into 4 regions. The principal components of monthly rainfall data were extracted from rainfall stations separated cluster regions. A correlation analysis was performed with extracted principal components and sea surface temperatures. At the results of correlation analysis, positive correlation coefficients were larger than negative correlation coefficients. In addition, The 3 month of principal components on monthly rainfall predicted by locally weighted polynomial regression using observed data of sea surface temperature where biggest correlation coefficients have. The result of forecasting through the locally weighted polynomial regression was revealed differences in accuracy. But, this methods in the research can be analyzed for forecasting about monthly rainfall data. Therefore, continuous research need through hydrological meteorological factors like a sea surface temperature about forecasting of the rainfall events.

• Transactions of the Korean Society of Mechanical Engineers
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• v.9 no.5
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• pp.613-620
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• 1985

An analysis on the thermal instability of horizontal Blasius flow in the form of longitudinal vortices has been carried out by introducing the 3-dimensional spatial dependence of the disturbance quantities. The stability problem has been simplified significantly by considering the limiting case of infinite Prandtl number and by skilfully replacing the boundary conditions at infinity with the interface conditions at the edge of the thermal boundary layer (or by simply confining the thermal disturbances in the thermal boundary layer). The advantage of this approach is that the critical values marking the onset of thermal instability can be readily obtained as solutions of the eigenvalues problems formulated by a 6*6(or a 5*5) determinant. Present analysis provides reasonable explanations on the existing experimental and theoretical data. Especially, the heat transfer correlation based on the present analysis agrees well with the existing experimental data.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.388-391
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• 2011

강우침식인자를 구하기 위해서는 개별 호우사상의 30분 최대 강우강도를 산정해야 한다. 이를 위해서는 연속된 분단위 강우자료가 필요하지만, 자료 획득이 제한되어 지점별로 보다 얻기 쉬운 시간 단위 강우량을 이용하여 30분 최대 강우강도를 추정하려는 노력이 있어왔다. 본 연구는 시강우량을 이용하여 개별 호우사상의 30분 최대 강우강도를 추정하기 위한 것으로서 대구 지점의 1960년~1999년 기간의 818개 호우사상을 이용하였다. 분류된 호우사상별 30분 최대 강우강도를 기상청으로부터 획득한 분단위 강우자료를 이용하여 산출한 뒤, 이를 참값으로 하여 60분 최대 강우강도와의 상관관계를 분석하였다. 그 결과 대구 지점의 60분 최대 강우강도로부터 30분 최대 강우강도를 추정할 수 있는 변환계수는 1.228로 나타났으며, 고정시간 1시간 최대 강우강도로부터 30분 최대 강우강도를 추정할 수 있는 변환계수는 1.3778로 나타났다.

• The Korean Journal of Applied Statistics
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• v.29 no.6
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• pp.999-1005
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• 2016

The advent of big data brings the opportunity to answer many open scientic questions but also presents some interesting challenges. Main features of contemporary datasets are the high dimensionality and massive sample size. In this paper, we give an overview of major challenges caused by these two features: (1) noise accumulation and spurious correlations in high dimensional data; (ii) computational scalability for massive data. We also provide applications of big data in various fields including forecast of disasters, digital humanities and sabermetrics.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.440-442
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• 2022

2017년 가치가 급상승하며 전 세계적으로 큰 이슈를 끈 비트코인은 최근 많은 사람들의 재태크 수단으로 이용되고 있다. 그러나 비트코인은 비슷한 재태크 수단인 주식과 다르게 24시간 내내 거래되고, 기사 하나하나에 의해 가격변동의 폭이 굉장히 크다. 이는 가격이 급변하는 비트코인 시장에서 가격을 예측하는데 어렵게 작용한다. 본 논문에서는 직접적인 가격 예측은 어렵다고 판단해 비트코인 가격변동에 영향을 주는 요소들을 딥러닝 모델을 통해 일일 단위 종가 가격의 등락을 예측해 위의 요소들이 비트코인 가격변동과 상관관계를 가지는지 확인한다.

• The korean journal of orthodontics
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• v.25 no.2 s.49
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• pp.175-185
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• 1995

This study was undertaken to investigate the activities of genioglossus and orbicularis oris muscle between normal occlusion and anterior open bite group. 39 subjects without the experience of orthodontic treatment and T.M.disorder were selected for this study. 20 subjects were normal occlusion. 19 subjects were anterior open bite. The twenty items were measured from the cephalometric headplates, and EMG recording of the genioglossus, orbicularis oris muscle were taken at rest position, water swallowing, jaw opening, isometric tongue protrusion, maximum tongue protrusion. All data were analyzed and processed with the computer statistical method. The following results were obtained: 1. Except at rest position. the muscle activities of genioglossus muscle in anterior open bite were higher than in normal occlusion with singificatn difference. 2. Except druing water swallowing, the muscle activities of orbicularis oris muscle in anterior open bite were higher than in normal occlusion with significant difference. 3. During maximum tongue protrusion, the geniolossus muscle of anterior open bite subjects showed the highest muscle activity. 4. Anterior open bite showed closer interrelationship between facial morphology ad the genioglossus, orbiculars oris muscle activities than that of nomral occlusion with significatn difference.

• Korean Journal of Agricultural Science
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• v.2 no.1
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• pp.143-149
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• 1975

To obtain some basic informations on the breeding of Kudzu, 42 individuals were selected and their morphological characteristics were investigated and analyzed. The shape of leaves was classified as 4 types and area of leaves into 5 steps. Internode length was distributed between 13 cm and 37 cm. Significant correlations were recognized between petiole and leaf area, between internode length and internode diameter and between internods diameter and leaf area.