• PNF and Movement
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• 제19권1호
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• pp.19-29
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• 2021

Purpose: This study aimed to compare the effects of a four-week scapular stabilization exercise program using the PNF technique on scapular symmetry and range of flexion motion (ROM), pain, function, and quality of life (QOL) in post-mastectomy women with breast cancer. Methods: This study included 20 women divided into an experimental group (n = 10) and a control group (n = 10). All patients performed complex decongestive physiotherapy for 40 min daily, five times per week for four weeks. The experimental group performed the extra scapular stabilizing exercise program using the PNF technique for 50 min daily, five times per week for four weeks. Scapular symmetry, shoulder flexion ROM, pain and function, and QOL were subsequently assessed. For ROM measurement, the range of shoulder flexion was measured using a clinometer smart phone application; the pain of the shoulder was measured using the visual analogue scale (VAS); the scapular position was measured using a lateral scapular slide test (LSST); the level of pain and functional activity was measured using the Shoulder Pain and Disability Index (SPADI); and the QOL was measured using Functional Assessment of Cancer Therapy-Breast. Results: There were significant differences in shoulder flexion ROM, VAS, SPADI, and LSST 0˚ and 45˚ when the experimental group was compared with the control group (p < 0.05). After the intervention, there was an improved within-group change in the ROM, SPADI, LSST, and QOL in both the experimental and control groups. Conclusion: These findings suggest that a scapular stabilization exercise program using the PNF technique may be used as a possible treatment option for post-mastectomy women with breast cancer that aims to improve scapular position, shoulder ROM and function, and QOL.

• 한국융합학회논문지
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• 제12권4호
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• pp.125-133
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• 2021

체험의 시대를 맞아 사용자 체험은 다양한 분야에서 주목받고 있으며 사용자 체험의 중요성을 강조하기 시작하였다. 본 논문은 스마트폰 의료 앱의 사용자 체험에서 중요한 요인이 무엇인지 분석하며 이러한 요인들의 상대적 중요도를 평가함으로써 의료 앱을 개발 시 우선시해야 할 사항에 대하여 제의를 하며 의료 엡 디자인의 최적화 및 서비스 품질 개선에 참고로 체공하고자 한다. 우선 사용자 체험 이론, 스마트폰 앱의 사용자 체험과 모바일 의료 앱에 관한 연구를 바탕으로 스마트폰 의료 앱 사용자 체험 요인을 정리한다. 다음으로 스마트폰 앱 다운로드 경험이 많고 의료 앱을 사용하는 20~40대 200명을 대상으로 설문조사를 실시하며 18가지 영향요인에 대하여 점수를 매긴다. 마지막으로 개발자가 새로운 앱을 개발할 경우 제품자원, 의료 광고 추천, 의사와 환자의 상호 작용성, 정서적 재미 유발, 응용 프로그램 학습 용이성 등의 영향요인이 사용자가 앱을 사용한 경우 좋은 체험을 얻게 하는 데 큰 영향을 미친다는 것을 알았다.

• 디지털산업정보학회논문지
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• 제10권4호
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• pp.109-116
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• 2014

In recent, ISM (Industrial Scientific Medical) band that is 2.4GHz band authorized free of charge is being widely used for smart phone, notebook computer, printer and portable multimedia devices. Accordingly, studies have been continuously conducted on the possibility of coexistence among nodes using ISM band. In particular, the interference of IEEE 802.11b based Wi-Fi device using overlapping channel during communication among IEEE 802.15.4 based wireless sensor nodes suitable for low-power, low-speed communication using ISM band causes serious network performance deterioration of wireless sensor networks. This paper examined a method of identifying channel status to avoid interference among wireless communication devices using IEEE 802.11b (Wi-Fi) and other ISM bands during communication among IEEE 802.15.4 based wireless sensor network nodes in ISM band. To identify channels occupied by Wi-Fi traffic, various studies are being conducted that use the RSSI (Received Signal Strength Indicator) value of interference signal obtained through ED (Energy Detection) feature that is one of IEEE 802.15.4 transmitter characteristics. This paper examines an algorithm that identifies the possibility of using more accurate channel by mixing utilization of interference signal and RSSI mean value of interference signal by wireless sensor network nodes. In addition, it verifies such algorithm by using OPNET Network verification simulator.

• PNF and Movement
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• 제19권2호
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• pp.261-267
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• 2021

Purpose: This study aimed to investigate changes in gait variables depending on whether a task was performed using a smartphone while walking on a ramp. Methods: The participants of this study were 41 college students attending U University located in Gyeongju City, Gyeongsangbuk-do. In this study, gait variables were measured during ramp gait while using a smartphone to perform a task and during ramp gait without performing such tasks. In other words, four walking conditions were used: 1) walking up a ramp, 2) walking up a ramp while using a smartphone to perform a task, 3) walking down a ramp, and 4) walking down a ramp while using a smart phone to perform a task. Gait variables were measured using a gait analysis tool (Legsys; BioSensics, USA), and stride time, stride length, stride velocity, cadence, and double support were analyzed. The order of measurements was randomized to control for order effects due to repeated measurements. Results: The comparative analysis of gait variables according to the presence or absence of smartphone use during ramp gait showed that there were significant differences in stride time, stride length, and stride velocity during both ramp ascent and ramp descent (p < 0.05). In both ramp ascent and ramp descent, stride time increased when walking using a smartphone, compared to when walking without using a smartphone (p < 0.05). However, in both ramp ascent and ramp descent, stride length and stride velocity were decreased when walking using a smartphone compared to when walking without using a smartphone (p < 0.05). Conclusion: The study results showed that the use of a smartphone during walking can affect safety. Therefore, it is necessary to improve the awareness of risks associated with walking while using a smartphone, and further research needs to be conducted in various environments and with different ramps.

• 한국BIM학회 논문집
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• 제12권4호
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• pp.61-69
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• 2022

Earthmoving operations account for approximately 25% of construction cost, generally executed prior to the construction of buildings and structures with heavy equipment. For the successful completion of earthwork projects, it is crucial to constantly monitor earthwork equipment (e.g., trucks), estimate productivity, and optimize the construction process and equipment on a construction site. Traditional methods however require time-consuming and painstaking tasks for the manual observations of the ongoing field operations. This study proposed the use of a GPS sensor embedded in a smartphone for the tracking and visualization of equipment locations, which are in turn used for the estimation and simulation of cycle times and production rates of ongoing earthwork. This approach is implemented into a digital platform enabling real-time data collection and simulation, particularly in a 2D (e.g., maps) or 3D (e.g., point clouds) virtual environment where the spatial and temporal flows of trucks are visualized. In the case study, the digital platform is applied for an earthmoving operation at the site development work of commercial factories. The results demonstrate that the production rates of various equipment usage scenarios (e.g., the different numbers of trucks) can be estimated through simulation, and then, the optimal number of tucks for the equipment fleet can be determined, thus supporting the practical potential of real-time sensing and simulation for onsite equipment management.

• 대한물리의학회지
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• 제18권2호
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• pp.83-92
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• 2023

PURPOSE: This study examined the effect of using a smartphone according to the direction of wearing a bag on muscle characteristics and balance ability in adults in their 20s with chronic ankle instability. METHODS: Twelve people with chronic ankle instability were examined for three weeks. The types of carrying a bag were classified into three conditions: to the right, to the left, and on both sides. The muscle characteristics and balance ability were measured and analyzed. The one-way ANOVA was used to obtain a difference between conditions. RESULTS: A significant difference in the muscle tone of medial gastrocnemius was observed between the dominant group and the non-dominant group. The muscle tone and stiffness of the peroneus longus decreased significantly after walking with a smartphone and carrying a bag. The maximum slope of the forward and reverse directions increased and decreased significantly, respectively, after walking with a smartphone and carrying a bag on both sides. CONCLUSION: In this study, muscle fatigue causes a decrease in muscle tone and stiffness with chronic ankle instability when carrying a heavy back while walking, and there were asymmetric changes in the balance ability. Therefore, adults with chronic ankle instability should carefully avoid carrying a heavy bag for extended times, irrespective of the style or type of the bag.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.580-581
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• 2021

스마트폰, 태블릿 등 모바일 기기에서 GPS 기술을 적용하는 다양한 위치-기반 서비스(Location-Based Service)가 있다. 본 논문에서는 코로나 19로 인해 비대면 서비스가 증가하는 현실에서 비대면 지향의 위치-기반 서비스 소프트웨어를 설계하였다. 제안한 모델은 물품 혹은 서비스를 거래하는 주체들이 거래를 위해 위치 정보를 파악하고, 실시간으로 확인된 정보를 활용한다. 제안된 스케줄링 및 우선순위 제어 알고리즘을 통해 효율적인 서비스 할당이 가능하며, 이를 검증하기 위해 웹/앱 기반으로 시뮬레이션을 수행하였다. 상용화된 플랫폼이 위치-기반 중고 물품 거래 중심인데 반해, 설계한 방법은 개인간 직거래가 아닌 비대면 서비스를 제공하고, 소상공인, 프랜차이즈 등 사용자에게 광범위한 거래 및 서비스를 제공한다는 점에서 차별성이 있다.

• 한국전자통신학회논문지
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• 제18권5호
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• pp.877-884
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• 2023

본 연구에서, 개인 차량이 주차할 수 있는 지정 공간 및 정의된 개인사용 시간에 다른 차량이 주차하여 있는 경우 초음파 물체 인식 센서를 활용하여 차량 진입을 파악하고, 그리고 카메라 센서가 번호판을 인식한다. 만일 개인 차량 소유자가 인정한 차량이 아닌 경우, 어플리케이션 서버의 "개인 주차장 운영 블록"은 경찰청의 차량 번호정보 조회 Open API를 근거로 개인의 전화번호를 받는다. 이후 주차 처리시 비권리권자는 주차 권리권자의 승인을 받아서 인정되는 시간만큼 주차를 하고 주차요금을 시청 공공 계좌에 입금한다. 본 연구를 통하여, 시청이 인정해준 개인 주차 공간에서 도심의 주차관리를 가장 효과적으로 할 수 있는 운영 처리 방법을 찾을 수 있었다.

• 한국전자거래학회지
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• 제22권1호
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• pp.1-13
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• 2017

스마트폰, 디지털 카메라 및 사무용 스캐너와 같은 보급형 디지털 영상장비가 과거에 비해 매우 개선되었음에도 실제 산업 현장에서 활용되는 경우는 거의 없다. 이것은 산업 현장에서 요구되는 높은 수준의 품질과 성능 때문이지만, 향상된 보급형 장비의 성능이 충분히 기존 산업용 장비를 대신할 만큼 성장했는지에 대해 객관적인 검증은 부족한 상황이다. 만약 보급형 장비가 활용될 수 있는 영역을 실험을 통해 객관적으로 확인할 수 있다면, 기업들은 고가의 산업용 장비 구입에 투자하는 비용을 절감할 수 있을 것이다. 본 연구에서는 PVC(Polyvinyl chloride) 컬러용지의 색차판별에 대한 보급형 디지털 영상장비의 활용가능성을 실험하고자 한다. 스마트폰, 디지털 카메라 및 사무용 스캐너를 색차판별 실험에 사용하여, 사무용 스캐너가 적은 측정오차와 일관된 결과를 보이는 것을 확인하였다. 사무용 스캐너를 실제 산업용 분광색차계와 비교하는 추가 실험을 통해 두 결과의 상관관계가 높다는 것을 확인하였다. 본 연구의 결과를 토대로 색차판별을 위한 적절한 관리기준을 마련한다면 PVC 컬러용지 제작에서 사무용 스캐너가 산업용 분광색차계를 충분히 대신할 수 있을 것으로 기대된다.

• Journal of Information Technology Applications and Management
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• 제20권1호
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• pp.43-51
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• 2013

Human being does work to live out and they have their private life because human has sociality. Both work and life are important to live out but they are on the trade-off relationship. Because keeping the balance between work and life is too hard, it has been interested by academic and practical areas. Definition of Work-life balance here is that balance or imbalance arising between work and life has no negative impact on their daily life. Above all, Work-life balance is important because it is strongly related to identity. Recently, the introduction of the mobile office system has emerged as a way to solve the problem of work-life balance. It is based on the teleworking which was formerly generated. Teleworking is to perform the work in the employee's home or office space set aside without going into the workplace. Concept of the mobile office system here is not only using portable devices during work for convenience but also the system which is designed for the performance. Thanks to the diffusion of smart devices(smart phone, tablet pc), mobile office system has been spread. Although the importance of mobile office systems is emerging, there are few researches about it. Even they mostly focus on the standpoint of performance of mobile office system. However, Quality of life is as important as the performance. As a part of Quality of Life field, Work-life balance is the closest to employee's quality of life. So this study aims to examine the effect of the use of mobile office systems on work-life balance. To do so, we try to find factors effecting Work-life balance from existing studies and then set a research model. We set the use of mobile office systems as independent variables which are divided by use of function, use by location and use by situation. There are four dependent variables - sense of self command, sense of balance, solving work problem, solving life problem. We collected data from employees who are using mobile office systems on their job. 215 people were participated in the survey and we used multiple regression analysis to verify our research model. Results show that every independent variable has no impact on solving work problem while they have slight impact on the other dependent variables. Especially use on the business trip has significant effect on dependent variables. It means that there is a possibility use of mobile office system could control the employee's quality of life and system should be evolved until it covers even critical tasks. Also, support for mobile office system -education, encouragement-should be provided. By mobile office system is maturing, future research would be done.