• Research in Community and Public Health Nursing
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• v.33 no.3
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• pp.279-289
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• 2022

Purpose: This is a descriptive correlation study to confirm the effect of stress and anxiety caused by COVID-19 on the quality of life of small business owners in an area under environment of COVID-19. Methods: The participants were 150 small business owners in an area. The collected data were analyzed by descriptive statistics, an independent t-test, a one-way ANOVA, Pearson's correlation coefficients, and multiple regression with the SPSS 25.0 Program. Results: The stress of small business owners averaged 3.67±0.65 out of 4 points, anxiety of COVID-19 was 2.65±0.52, and quality of life was 75.61±20.26 out of 130 points. The quality of life showed a significant negative correlation with 'fear of infection' (r=-.42, p<.001), 'difficulties caused by social distancing' (r=-.49, p<.001) in the stress subdomain, and anxiety (r=-.61, p<.001). On the other hand, stress, 'fear of infection' (r=.50, p<.001), 'difficulties caused by social distancing' (r=.60 p<.001), 'anger against others' (r=.35, p<.001) and anxiety showed positive correlation. Factors affecting the quality of life of the subjects were 'fear of infection' in the stress subdomain (β=-.23, p=.003), anxiety (β=-.45, p<.001), and residential area (J zone) (β=-.16, p=.030). These factors explained 47.0% of the variance. Conclusion: In order to enhance the quality of life of small business owners in an area, it is required to reduce stress and anxiety. In addition, it is necessary to prepare an intervention program that can reduce stress and anxiety of small business owners.

• The Journal of the Convergence on Culture Technology
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• v.8 no.5
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• pp.583-589
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• 2022

Due to COVID-19, which has thrown the whole world into chaos, it has become an era where many technologies and contents are made non-face-to-face. At the same time, the popularity of the metaverse service is also increasing day by day, and the virtual costume (avatar) industry, one of the sub-industries, is also growing. In this study, we designed and developed a system for creating virtual costumes to be uploaded to ZEPETO, a mobile metaverse service. Unlike the existing service that requires a program that operates in a PC environment, it can be produced only by shooting and simple operation through a mobile device. With the advantage of being able to process all tasks of this system in a mobile environment, small businesses and individual operators who are not familiar with external programs will be able to more easily access the 3D virtual clothing industry.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.8-8
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• 2023

하천에 설치된 횡단구조물은 어류의 이동을 방해하거나 불가능하게 만들지만, 어도를 통해 어류의 이동 및 서식생태에 미치는 영향을 최소화할 수 있다. 하천에 서식하는 대부분의 어종은 연중 회유하는 특성을 갖기 때문에 어류의 자유로운 이동을 위해서 어도는 필수적으로 설치해야 하는 시설이다. 어도는 어류의 유영능력을 기반으로 수리시설물의 낙차나 하천의 유량 등을 고려하여 설계한다. 이처럼 어도 내의 흐름은 어류의 소상능력에 영향을 미치는 주요 인자로 평가되고 있으며 어도 내 흐름에 따라 어도의 이동효율에 차이가 발생한다. 따라서 본 연구에서는 수치모의를 통해 계단식 어도 내의 어류 친화적 흐름의 특성을 연구하였다. 어류 친화적 흐름은 어류가 쉽게 유영할 수 있는 흐름을 의미하며, 유속, 난류운동에너지, 에너지소산을 기준으로 판단할 수 있다. 이를 위해 3차원 수치모형 FLOW-3D를 이용하였으며, 개수로 실험을 통해 모델의 검증을 수행하였다. 연구에서 사용한 어도의 형식은 국내에서 전체 어도의 20%를 차지하고 있는 계단식 어도로 선정하였다. 수위와 유속에 따라 흐름조건을 설정하였으며, 실험결과를 통해 어류의 유영능력에 영향을 미치는 3가지 항목의 값을 계산하여 어도 내의 어류 친화적 흐름의 적합성을 판단하였으며, 이를 바탕으로 최적의 흐름조건을 제시하였다. 향후, 본 연구결과는 계단식 어도를 설계하는 것에 기초자료가 될 수 있을 것이라 기대된다. 그러나 어도의 설계는 어도의 설치위치나 어도의 입구 위치 및 형태 등과 같은 설치계획에 따라 어도의 이동효율이 좌우될 수 있기 때문에 하천환경을 고려하는 추가적인 연구가 필요할 것으로 판단된다.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.120-120
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• 2022

우리나라 친환경 에너지 생산의 주요 축을 담당하고 있는 양수발전댐의 홍수 시 정교한 수계운영을 위한 방안으로 강우-유량-댐 수위 매트릭스(이하, PDH Matrix)를 개발하고 양수발전소상-하부댐 연계 운영에 따른 홍수 영향을 분석하였다. 연구 대상지역은 강원도 양양군 서면에 위치하고 있는 국내 최대 양수발전소인 양양양수 발전소로 총 저수용량 92만 m³의 콘크리트 중력식댐으로 유역면적은 약 125 km²이다. 양양양수 발전댐의 수계운영을 위한 PDH Matrix는 지속기간별 강수량 규모에 따른 홍수량 및 댐 최고수위 추정치를 판단할 수 있는 조견표로 강우규모 30 - 360 mm (30분 간격, 12개 강우규모) 및 지속기간 1-24시간 (1시간 간격, 24개 지속기간)인 총 288개의 강우조건별 홍수수문곡선을 개발하였다. 개발된 홍수수문곡선을 입력자료로 기존 댐 운영 방식인 AutoROM을 적용하여 저수지 홍수추적을 HEC-ResSim 모형으로 수행하고 최종적으로 개별 강우사상에 대한 강수량-유량-댐 수위 테이블을 작성하였다. 홍수기 댐 운영에 따른 최고수위는 초기 댐 수위조건에 따라 변동되므로 초기 댐 수위 조건(EL. 115 - 117 m, 1 m 간격)별 PDH Matrix를 각 각 개발하였다. 또한, 양수발전소의 특성상 상부댐으로 양수 또는 발전 방류에 따라 홍수 시 댐의 치수안전성에 미치는 영향이 크므로 상, 하부댐 운영에 따른 홍수영향 분석을 수행하였다. 구체적으로 하부댐에서 상부댐으로 양수 시 시간에 따른 하부댐 저수지의 수위변화 양상을 추정하였으며 극한적 홍수상황을 고려하기 위하여 상부 저수지가 만수인 상황에서 불가피하게 하부댐으로 방류가 필요한 상황에 대비한 홍수기 운영방안을 제안하였다. 본 연구는 하부댐-상부댐을 연계하여 운영하는 양수발전댐의 홍수기 수계 운영 방안을 수립한 첫 연구로 향후 연구에서 개발한 강우-유량-댐 수위 매트릭스(PDH Matrix) 작성 기법을 타 양수발전소 수계 운영 시 활용할 수 있을 것으로 기대된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.580-581
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• 2021

There are various Location-Based Services(LBS) that apply GPS technology in mobile devices such as smart-phone and tablet. In this paper, we designed non-face-to-face oriented LBS software in the reality that non-face-to-face services are increasing due to COVID-19. The proposed model searches location information for trading goods or services and utilizes information identified in real time. The proposed scheduling and priority control algorithm provides efficient service allocations and simulation was performed based on web/app to verify this. While commercialized LBS platforms focus on used goods transactions, the designed method is different in that it provides non-face-to-face services and not-direct transactions between individuals. It provides a wide range of transactions and services to users such as small business owners and franchises.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.4B
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• pp.429-439
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• 2008

The purpose of this study is to examine the characteristics of run-up height over sandy beach due to the shape of submerged breakwater. For the discussion on it in detail, 3-Dimensional numerical model with Large Eddy Simulation, which is able to simulate directly interaction of Wave Structure Sandy beach (hereafter, LES-WASS-3D; Hur and Lee, 2007) has been used to simulate run-up height over sandy beach as well as wave field around submerged breakwaters. Using the results obtained from numerical simulation, the effects of the shape of submerged breakwaters (crown height, crown width, crown length and submerged breakwater's slope gradient) on run-up height over sandy beach have been discussed related to the wave height distribution and characteristics of up-layer flow around ones.

• The Korean Journal of Franchise Management
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• v.1 no.1
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• pp.87-103
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• 2010

Today, banks offer banking services to a large number of customers by a branch network spread all over the nation. The quantity and quality of services are advanced by fierce competition in their field. So they are attracting customers based on high confidence in the financial industry. In spite of these developments, the retail bank market currently does not satisfy customers demands and various desires. In this research, the problems with banking services were observed. It was proposed that the banking services apply a franchise business model. First, this proposal will reduce the business expenses by collaborating profits with head office of banks and affiliates. Second, it will offer greater satisfaction to the customers. Through the mutual collaboration with head office of banks and affiliates in this proposal, it is anticipated that banks will reduce their business expenses and improve services for customers by offering convenient and fast banking services. It is also expected that the banks will expand and make up their weakness through increased profit and customers will be provided additional services.

• The Journal of the Convergence on Culture Technology
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• v.9 no.2
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• pp.29-35
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• 2023

This study examined the effect of store fit perceived by consumers for improved signboards on visit intention to store, and the mediating effect of informativeness, entertainment, and irritation. The survey was conducted from November 7 to November 18, 2022 with 150 undergraduate and graduate students who had experience visiting areas where signboard improvement projects were implemented. The collected data were analyzed using SPSS 26.0 and PROCESS Macro 4.2. The results showed that store fit had a positive effect on visit intention to store by mediating informativeness and entertainment. This results suggest that practitioners of local governments and government agencies and store owners should consider store fit of signboards as important when participating in signboard improvement projects.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.3B
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• pp.345-354
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• 2008

In this present study, we made a first attempt to investigate physical transformations of incident waves in surf and swash zone and hydrodynamic phenomena of detached and submerged breakwaters. For an accurate simulation of the complicated wave deformation, Three-Dimensional numerical model with Large Eddy Simulation has been developed recently and expanded properly for the current applications, which is able to simulate an accurate and direct WAve Structure Sandy seabed interaction (hereafter, LES-WASS-3D). LES-WASS-3D has been validated through the comparison with experimental results for limited cases, and has been used for the simulation of wave run-up on sandy beach, mean fluid flows over and around submerged structures and swash zone (alongshore/rip current), and spatial distribution of wave height in wide fluid regions. In addition, a strategy of efficient deployment ($Y/L_i=1.50{\sim}1.75$, $W/L_r=0.50$) of the submerged breakwaters has been discussed.

• Journal of the Korea institute for structural maintenance and inspection
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• v.27 no.5
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• pp.49-56
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• 2023

This study proposed a damage location estimation method for automated image-based port infrastructure inspection. Memory efficiency was improved by calculating the homography matrix using feature detection technology and outlier removal technology, without going through the 3D modeling process and storing only damage information. To develop an algorithm specialized for port infrastructure, the algorithm was optimized through ground-truth coordinate pairs created using images of port infrastructure. The location errors obtained by applying this to the sample and concrete wall were (X: 6.5cm, Y: 1.3cm) and (X: 12.7cm, Y: 6.4cm), respectively. In addition, by applying the algorithm to the concrete wall and displaying it in the form of an exterior damage map, the possibility of field application was demonstrated.