• Journal of Digital Convergence
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• v.14 no.7
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• pp.251-258
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• 2016

This study was to identify the relationships between activities of daily living(ADL) and stress by health characteristics in elderly living alone. A total of 260 subjects were selected through convenient sampling. Data were collected with a self-reported questionnaire from October 20 to November 20, 2014. Data were analyzed using descriptive statistics, t-test, ANOVA, Pearson Correlation Coefficients. Differences in ADL and stress according to health characteristics were as follows. ADL were significantly different according to problem of dietary habits. drinking, unsuitable health care, management groups. Stress were significantly different according to stress and availability and drug abuse. There was a negative correlation between ADL and stress. The findings of this study may be useful in understanding the health status of elderly living alone and developing more specific programs about ADL and stress control. Getting older, with the change in weight and chronic diseases, as the elderly living alone are indisposed with ADL, the applicatiom of physical activity programs and a stress management strategy is required.

• Korean Journal of Environment and Ecology
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• v.11 no.4
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• pp.397-406
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• 1998

To investigate the structure and the conservation strategy of natural forest at Taech'ongbong-Hangyeryong Area in Soraksan. 45 plots(20m*20m) set up with random sampling method were surveted. Four groups - Quercus mongolica - Acer pseudosieboldianum community, Avies nephrolepis - Tilia amurensis - Quercus mongolica community, Abies nephrolepis - Taxus cuspidata community, Abies nephrolepis - Qurecusmongolica community - were classified by cluster analysis. High positive correlations were proved between Abies nephrolepis and Betula ermanii; Abies nephrolepis and Pinus pumila; Aies nephrolepis and Rhododendron mucronulatum var. ciliatum; Betula ermanii and Pinus pumila; Betula ermanii and Rhododendron mucronulatum var. ciliatum; Pinus pumila and Rhododendron mucronulatm var. ciliatum; Quercus mongolica and Rhododendron schlippenbachii; Quercus mongolica and Qeigela subsessilis; Euonymus macroptera and Syringa reticulata; Euonymus macroptera and Viburnum wrightii; Acer ukurunduense and Euonymus oxyphyllus, and high nagative correlations were proved between Betula ermanii and Acer pseudosieboldianum; Quercus mongolica and Tripterygium regelii; Rhododendron schlippenbachii and Tripterygium regelii; Carpinus cordata and Acer pseudosieboldianum. Species diversity(H') of investigated area was calculated 2.1352~2.8016.

• Korean Journal of Environment and Ecology
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• v.7 no.2
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• pp.155-163
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• 1994

To investigate the structure and the conservation strategy of natural forest at Paekryunsa-Hyangcho kpong area in Tokyusan, 21 plots (400$m^2$) set up with random sampling method. Four groups were classified by cluster analysis. High positive correlations was proved between Tripterygium regelii and Acer tschonoskii var. rubripes, Viburnum sargentii and Betula ermanii, Corylus heterophylla var. thunbergii and Stephanandra incisa, Betula costata and Cornus controversa, Acer mono and Tilia amurensis, Tilia amurensis and Kalopanax pictum, Lonicera maackii and Viburum sargentii, and Betula ermanii, Acer tschonoskii var. rubripes and Taxus cuspidata, and Viburnum sargentii, and High negative correlations was proved between Acer pseudo-sieboldianum and Viburnum sargentii, Tripterygium regelii and Stephanandra incisa, Acer tschonoskii var. rubripes, and Stephanandra incisa. Species diversity(H') of investigated area was calculated 0.9402~1.2473. Taxus cuspidata, Betula ermanii and Abies koreana at Hyangchokpong area in Tokyusan should be conserved.

• Korean Journal of Environment and Ecology
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• v.10 no.1
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• pp.151-159
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• 1996

To investigate the structure and the conservation strategy of natural forest at Sangwonsa, Pirobong, Horyongbong area in Odaesan, 23 plots(20*20m) were set up with random sampling method. Three groups were classified by cluster analysis; Quercus mongolica-Abies holophylla community, Acer mandshuricum- Abies nephrolepis community, and A. holophylla-Ulmus laciniata community. High positive correlations were proved betwween Tilia amurensis and Acer mono; Sorbus commixta and Euonymus macropterus, Betula ermanii, and Viburnum sargentii; E. macropterus and V. sargentii; B. ermanii and V. sargentii; A. mephrolepis and Syringa velutina var. kamibayashii; S. velutina var. kamibayashii and Salix hulteni; Pinus densiflora and A. holophylla. High negative correlations were proved between Q. mongolica and Juglans mandhuricum; Sasa vorealis and E. macropterus; Acer mono and Philadelphus schenckii; A. holophylla and E. macropterus, B. ermanii, S. velutina var. kamibayashii, and Salix hulteni. Species diversity(H') of investigated area was 1.2973~1.46331.

• Korean Journal of Environment and Ecology
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• v.10 no.1
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• pp.160-168
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• 1996

To investigate the structure and the conservation strategy of natural forest at Turobong-Sangwangbong area in Odaesan, 19 plots(10*10m) were set up with random sampling method. Several characteristics - needle injury, rate of fallen needle, stem injury, shoot and twig, apical dominance, tree form- of Abies nephrolepis and Tavus cuspidata were investigated with checklist. Two groups(Taxus cuspidata community and Quercus mongolica-Betula ermanii community) were classified by cluster analysis. High positive correlations were prover between Taxus cuspidata and Tripterygium regelii, Sorbus commixta; Quercus mongolica and Euonymus sieboldianus. High negative correlations were proved between Taxus cuspidata and Abies nephrolepis, Quercus mongolica and Betula ermanii; Abies nephrolepis and Trioterygum regelii. Species diversity(H') of investigated area was 0.9608-1.24990. Mean score of Abies nephrolepis was calculated at 6.1 point and ratio of dead individuals was 10.9%. Mean score of Taxus cuspidata was calculated at 17.3 point. Injury of Taxus cuspieata was classified three types, such as branch dieback, wound cavity on the stem and crooked stem.

• Proceedings of the Korea Database Society Conference
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• 2000.11a
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• pp.227-238
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• 2000

Firewall은 다양한 부정Access의 방지책으로서 확실히 유효한 수단이지만 이 Firewall은 사용자로부터 지시된 설정을 충실히 실행하는 것으로 설정 오류, 소프트웨어의 정지, 허가된 룰을 악용한 침입 등 반드시 사용자가 바라는 작용을 무조건적 상태에서 보증해 주는 것은 아니다. 따라서 사용자는 도입 후 에도 운용시에 Access log를 감시하고 본래의 Security Policy에 반하는 행위를 매일 매일 체크하지 않으면 안될 상황에 처해 있다. 본 연구는 이러한 부정Access에 대한 이와 같은 Firewall의 현상에 대한 과제 중에서 "부정Access를 어떻게 하면 일찍, 정확히 체크할 수 있는가\ulcorner"라는 주제를 선택하여 Firewall의 한계와 그 대응책을 실제로 부정Access를 시험해 보는 것으로 검증하기로 하였다. 실험결과에서 (1)Port Scan이나 전자메일 폭탄(서비스정지공격)등은 Firewall로 방지하는 것은 불가능하거나 혹은 Checking이 곤란하다. (2)공격마다 로그 수집을 했음에도 관계없이 Firewall의 로그는 번잡하므로 단시간에 사태의 발견이 대단히 곤란하다고 하는 Firewall의 한계를 인식하였다. 그리고 그 대책으로서 우리는 체크 툴의 유효성에 착안하여 조사한 결과, 결국 무엇이 부정Access인가에 대해서는 어디까지나 이용하는 측이 판단하여 Firewall 상에 설정하지 않으면 안되지만 체크 툴은 이 부정Access 정보를 데이터베이스로서 갖고 있음으로써 '무엇이 부정Access인가'를 이용자 대신에 판단하고 툴에 따라서는 설정을 자동적으로 변경하여 부정 Access의 저지율을 향상시킨다. 이처럼 체크 툴은 Firewall의 수비능력을 보강하는 위치에 있다고 생각할 수 있다.다. 4 장에서는 3장에서 제기한 각각의 문제점에 대해 RAD 의 관점에 비추어 e-business 시스템의 단기개발을 실현하기 위한 고려사항이나 조건 해결책을 제안한다. 본 논문이 지금부터 e-business 를 시작하려고 하는 분, e-business 시스템의 개발을 시작하려고 하는 분께 단기간의 e-business 실현을 위한 하나의 지침이 된다면 다행이겠다.formable template is used to optimize the matching. Then, clustering the similar shapes by the distance between each centroid, papaya can be completely detected from the background.uage ("Association of research for algorithm of calculating machine (1992)"). As a result, conventional NN and CNN were available for interpolation of sampling data. Moreover, when nonlinear intensity is not so large under the field condition of small slope, interpolation performance of CNN was a little not so better than NN. However, when nonlinear intensity is large under the field condition of large slope, interpolation performance of CNN was relatively better than NN.콩과 자연 콩이 성분 분석에서 차이를

• The Transactions of the Korean Institute of Power Electronics
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• v.16 no.3
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• pp.266-273
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• 2011

This paper proposes a novel sensorless control scheme for a Permanent Magnet Synchronous Motor (PMSM) by using a parallel reduced-order Extended Kalman Filter. The proposed scheme can obtain rotor position and speed by back-EMF that is estimated by reduced-order EKF and save computation time greatly due to using a parallel structure that works by turns every sampling time. Therefore, proposed scheme has merits of conventional EKF, and problems of parameter sensitivity are partially overcome. And proposed scheme can safely estimate rotor speed and position by using new algorithms according to driving regions. Experimental results show the validity of the proposed estimation technique, and to verify the merit of the proposed scheme, a comparison of a new reduced-order EKF algorithm with a conventional EKF algorithm has been also made in terms of computation time.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.19 no.3
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• pp.103-119
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• 2016

This study aims to assess habitat feature on the large-scale spawning ground of the Boreal Digging Frog Kaloula borealis in Daemyung retarding basin of Daegu, and to analyze the relationships between species abundance and meteorological factors for each habitat. Fifty-seven(57) pitfalls were installed to collect species abundance of 4 survey regions, and high-resolution satellite image, soil sampling equipment, digital topographic map, and GPS were used to develop habitat features such as terrain, soil, vegetation, human disturbance. The analysis shows that the frog is most abundant in sloped region with densely herbaceous cover in southern part of the retarding basin. In the breeding season, lowland regions, where Phragmites communis and P. japonica dominant wetlands and temporary ponds distributed, are heavily concentrated by the species for spawning and foraging. Located in between legally protected Dalsung wetands and lowland regions of the retarding basin, riverine natural levee is ecologically important area as core habitat for Kaloula borealis, and high number of individuals were detected both breeding and non-breeding seasons. Temperate- and pressure-related meteorological elements are selected as statistically significant variables in species abundance of non-breeding season in lowland and highland regions. However, in sloped regions, only a few variables are statistically significant during non-breeding season. Moreover, breeding activities in sloped regions are statistically significant with minimum temperature, grass minimum temperature, dew point temperature, and vapor pressure. Significant meteorological factors with habitat features are effectively applied to establish species conservation strategy of the retarding basin and to construct for avoiding massive road-kills on neighboring roads of the study sites, particularly post-breeding movements from spawning to burrowing areas.

• Journal of Digital Convergence
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• v.19 no.9
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• pp.115-123
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• 2021

The primary purpose of the study is to investigate museum visitors' intention to use of smart tourism contents by applying the extended technology acceptance model. The study conducted an online survey of a convenience sampling of individuals who visited the National Museum of Korea, and it conducted confirmatory factor analysis and structural equation modelling to test hypotheses of the study. The results showed that information quality of immersive digital gallery in the National Museum of Korea had a significant regression weight on both perceived ease of use and perceived usefulness, and perceived ease of use had a significant regression weight on perceived usefulness. Moreover, both perceived ease of use and perceived usefulness had a significant regression weight on intention to use. The findings indicate that it is necessary to develop smart tourism contents with easily accessible and usable digital applications for promoting smart tourism in the museum.

• Safety and Health at Work
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• v.10 no.1
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• pp.80-86
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• 2019

Background: Emigration of health-care workers is a problem within global health systems which affects many countries, including Peru. Several factors have caused health-care workers to emigrate, including burnout syndrome (BS). This study aims to identify the association between BS and its dimensions with the intention of physicians and nurses to emigrate from Peru in 2014. Methods: A cross-sectional study, based on a secondary analysis of the National Survey of Health Users (ENSUSALUD - 2014) was conducted. Sampling was probabilistic, considering the 24 departments of Peru. We include the questionnaire for physicians and nurses, accounting for 5062 workers. BS was measured by the Maslach Burnout Inventory-Human Services Survey. Adjusted odds ratio (OR) was calculated using multiple logistic regression. Results: Of the study population, 44.1% were physicians, 37.7% males, and 23.1% were working in Lima. It was found that 2.8% [95% confidence interval (CI): 2.19-3.45] of health-care workers had BS. The overall prevalence of intention to emigrate among health-care workers was 7.4% (95% CI: 6.36-8.40). Association was found between BS and intention to emigrate in Peruvian health-care workers (OR = 2.15; 95% CI: 1.05-4.40). Emotional exhaustion was the BS dimension most associated with intention to emigrate (OR = 1.80; 95% CI: 1.16-2.78). Conclusion: Physicians and nurses from Peru who suffered from BS were more likely to have intention to emigrate. Policies should be established to reduce BS as a strategy to control "brain drain" from health-care workers of Peru.