• 한국정보통신학회논문지
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• 제21권6호
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• pp.1191-1196
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• 2017

최근 국내 이동통신 3사는 가정용 사물인터넷 서비스를 출시하면서 경쟁을 벌이고 있다. 대표적 출시된 서비스는 스마트홈 관련 서비스 분야이다. 그러나 이동통신 기반 사물인터넷 서비스는 초기 단계에 머물고 있으며, 지속적으로 다양한 서비스가 출시될 것으로 예상된다. 이러한 시점에 이미 출시된 서비스를 중심으로 사물인터넷 서비스에 대한 선호도 분석을 기획하게 되었다. 계층분석기법을 적용하기 위해 1단계 요인으로는 안전, 보안, 건강, 지능 그리고 가전으로 설계하였다. 또한 2단계 요인으로는 개념모델에서 제시된 18개 세부 서비스로 구성하였다. 분석결과 우선순위 1위는 헬스케어(23.2%)가 차지하였다. 이러한 결과는 소득 향상을 통해 건강에 대한 관심의 결과로 해석될 수 있겠다. 결과를 바탕으로 이론적 실무적 시사점을 제시하였다.

• 한국보육지원학회지
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• 제17권2호
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• pp.1-27
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• 2021

Objective: Covid-19 is changing many aspects of child care programs. The objective of this study was to explore how the pandemic and mitigation efforts affected the experiences and practices at child care centers in the summer of 2020. Methods: Focus group interviews and mobile surveys were conducted with principals and teachers of child care centers in August and September 2020. Descriptive statistics including frequency distributions, means and standard deviations and mean differences were used to analyze the survey data with SPSS 22.0. Results: It was found that each sector of child care settings experienced different difficulties and had various needs. Young children's lack of energy, child care teachers' workload and stress, and principles' efforts to interrupt transmission of the infectious disease based on insufficient government guideline and supports were revealed as the main experiences. Conclusion/Implications: The Covid-19 pandemic has had a tandem of influences on daily life at child care centers. As policy makers consider additional guidelines or supports measures to prevent the infection and spread of Covid-19 at child care centers, long-term as well as short-term plans at various levels should be considered to meet the unique needs of child care programs.

• International Journal of Advanced Culture Technology
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• 제9권4호
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• pp.431-438
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• 2021

We conducted this study to identifythe impact of mobile social commerce service quality on customer satisfaction and repurchaseintentions. The survey method used the self-recording way in which the respondents selected for the study and distributed 300 questionnaires, and with due personal care, researchers collected all the distributed questionnaires. The service quality in mobile social commerce has been selected as a factor of price, convenience, interaction and information through previous research. The results of this study are summarized as follows: First, the mobile social commerce service quality attributes all affected significantly(p<.05) customer satisfaction and the beta value of Economic Efficiency was the highest among the service quality attributes. Second, also the customer satisfaction influenced on consumer repurchase intentions significantly(p<.05).Based on the results of this study, we should strive to establish effective marketing strategies in the mobile social commerce industry.

• 보건의료산업학회지
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• 제12권4호
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• pp.173-190
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• 2018

Objectives: This study was conducted to analyze the symptoms and care needs of home-based hospice palliative patients in Busan and to provide a basic reference for developing practical guidelines for their care. Methods: By examining the registration cards of 409 hospice palliative patients, who were registered in community health centers in Busan as of 2016, this study retrospectively analyzed their characteristics, symptoms and care needs. Results: The average age was 70.6 years, 59.4% were receiving medical benefits, and 48.4% lived alone. As per the data obtained from the Palliative Performance Scale, many were able to mobile. Fatigue was the most severe and depression and anxiety were reported together, and their care needs were also high. Most subjects reported mild or low pain, but care needs were high. Furthermore, the medical benefits group showed a high level of symptoms and care needs across areas. Conclusions: To help subjects to live in their homes for as long as possible, it is necessary to identify symptoms and care needs and provide services in accordance with their severity and situation. Thus, it is necessary to develop practical guidelines for standardized community hospice palliative care services.

• Journal of Korean Neurosurgical Society
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• 제66권5호
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• pp.573-581
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• 2023

Objective : Due to the implementation of vaccinations and the development of therapeutic agents, the coronavirus disease 2019 (COVID-19) pandemic that started at the end of 2019 has entered a new phase. As a result, neurosurgeons should reconsider the way they treat their patients. As the COVID-19 situation prolongs, the change in neurosurgical emergency patients according to the number of confirmed cases is no longer clear. Outpatient treatment by telephone was permitted according to government policy. In addition, visits to caregivers in the intensive care unit were limited. Methods : The electronic medical records of patients who had been treated over the phone for a month (during April 2020, while the hospital was closing) were reviewed. Meanwhile, according to the limited visits to the intensive care unit, a video meeting was held with the caregivers. After the video meeting, satisfaction was evaluated using a questionnaire. Results : During April 2020, 1021 patients received non-face-to-face care over the telephone. Among the patients, no critical medical problem occurred due to non-face-to-face care. From July 2021 to December 2021, 321 patients were admitted to the neurosurgical intensive care unit and 107 patients (33.3%) including their caregivers agreed to video visits. Twice a week, advance notice was given that access would be made through a mobile device and the nurse explained to caregivers how to use the mobile device. The time for the video meeting was approximately 20 minutes per patient. Based on the questionnaire, 81 respondents (75.7%) answered that they agreed, and 26 respondents (24.3%) answered that they strongly agreed that was easy to communicate through video meetings. Fifty-two (48.6%) agreed and 55 (51.4%) strongly agreed that they were easy to understand the doctor's explanation. For overall satisfaction with this video meeting, three respondents (2.8%) gave 4/5 points and 95 respondents (88.8%) gave 5/5 points, and nine (8.4%) gave 3/5 points. Their reason was that there was not enough time. Conclusion : In situations where patient visits are limited, video meetings through a mobile device can provide sufficient satisfaction to caregivers. Telemedicine will likely become common in the near future. Health care professionals should prepare and respond to these needs and changes. Therefore, establishing a system with institutional support is necessary.

• 전자공학회논문지CI
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• 제41권3호
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• pp.47-54
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• 2004

무선 단말기를 이용하여 단순한 문장 및 음성 전송뿐만 아니라 인터넷과 같은 멀티미디어 서비스를 이용하고자 하는 사용자가 증가하고 있다. 본 논문에서는 무선 이동 망에서 Mobile IPv4 지역 위치등록(Regional Registration)을 개선하여 트래픽의 전송 지연과 메시지 발생양을 기존의 방법에 비해 낮출 수 있는 방안을 제안한다. 제안하는 방법은 CN으로부터 전송되는 패킷을 HA를 경유하지 않고 MN이 위치한 지역으로 전달하도록 한다. 본 논문에서는 각 방법에 대해 메시지 발생양과 패킷의 지연시간과의 관계를 보이고, 개선된 MIPv4 지역 위치등록을 이용하여 이를 최소화한다. 본 논문에서 제안하는 방법을 위치 등록 비용과 메시지전송 비용에 대해 기존의 방법과 비교하여 본 논문에서 제안하는 방법이 우수하다는 것을 입증한다.

• 한국컴퓨터정보학회논문지
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• 제22권10호
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• pp.47-54
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• 2017

In this paper, we propose a connected car platform architecture called Mobile Second for developing of verity convergence services. A Mobile Second platform architecture is designed to provide more powerful and diverse convergence services for vehicles and drivers by applying technologies of Connected Car and ICT Convergence in various ways. The Mobile Second platform is implemented by applying Tizen IVI and Android to hardware platforms for IVI, Nexcom's VTC1010 and Freescale's i.MX6q/dl respectively. The Mobile Second platform provides the driver with the vehicle's information via IVI devices, mobile devices and PCs, etc., and provides Vehicle Selective Gateway(VSG) and Vehicle Control Framework for the driver to control his/her vehicle, and also provides a web framework to enable the use of VSG's APIs for the monitoring and controlling the vehicle information in various mobile environments as well as IVI devices. Since the Mobile Second platform aims to create new variety of services for Connected Car, it includes service frameworks for Smart Care / Self diagonostics, Mood & Entertainment services, and Runtime, libraries and APIs needed for the development of related applications. The libraries given by the Mobile Second Platform provides both a native library for native application support and a Java Script-based library for web application support, minimizing the dependency on the platform and contributing the convenience of developers at the same time.

• 한국정보과학회논문지:정보통신
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• 제35권1호
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• pp.46-55
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• 2008

IP계층에서의 이동성 지원에 대한 연구가 활발히 진행되어, Internet Engineering Task Force(IETF)에서 Mobile IPv6(MIPv6) 프로토콜이 표준화 되었다. 이러한 MIPv6은 이동노드가 서브넷 사이를 이동할 때, 네트워크에 대한 연결성을 유지하여 끊김 없는 통신을 가능하게 해주며 이러한 과정을 핸드오버라고 한다. 이동노드가 서브넷 사이를 이동할 때마다 핸드오버 처리를 수행하게 되는데, 이러한 핸드오버 처리 동안에는 이동노드가 통신을 할 수 없는 긴 지연시간이 생긴다. 이러한 지연시간을 줄이기 위해서 IETF에서 Fast Handovers for Mobile IPv6(FMIPv6)를 표준화하였다. 하지만 FMIPv6 또한 홈에이전트와 상대노드에게 바인딩을 갱신하기 위한 시간은 길게 남아 있다. 이러한 문제점을 해결하기 위해서, 본 논문에서는 2계층 프로토콜로 IEEE 802.11을 사용하는 FMIPv6을 기반으로 하여 2계층 핸드오버 수행 중에 3계층 핸드오버 과정인 홈에이전트로의 바인딩 갱신과 Return Routability 과정을 미리 시작하여 전체적인 핸드오버 지연시간을 단축시키는 방법을 제안한다. 수학적인 비용 분석 방법을 통하여 제안하는 방법을 MIPv6과 FMIPv6의 방법과 비교 분석하였으며, MIPv6에 비하여 79%, FIMPv6에 비하여 31%의 성능 향상을 얻었다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2000년도 가을 학술발표논문집 Vol.27 No.2 (3)
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• pp.523-525
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• 2000

최근의 무선 네트워크의 급속한 발전으로 이동 컴퓨팅 분야도 IMT-2000 기술과 더불어 전세계 어디에서든지 위치에 상관없이 Mobile IP 프로토콜과 같은 이동성을 지원하는 IP 프로토콜을 통해서 인터넷에 접속할 수 있는 환경을 제공하게 될 것이다. Mobile IP 환경에서 MH(Mobile Host)는 이동하는 도중에도 인터넷에 접속을 유지하려면 자신의 care-of address가 변경될 때마다 이동한 셀의 FA(Foreign Agent)를 걸쳐서 HA(Home Agent)에게 등록하는 과정을 계속해서 수행해야 한다. 만약 MH의 FA와 HA간의 거리가 먼 경우에는 등록하는 시간이 길어질 것이며, 그만큼 인터넷에 접속되는 시간이 지연되어 인터넷 서비스가 늦어질 것이다. 본 논문에서는 MH의 FA와 HA와의 거리가 먼 경우에 지역적인 등록을 통해서 등록 지연 시간을 줄일 수 있는 동적인 지역적 등록 기법을 제안한다. 이러한 동적인 지역적 등록 기법은 MH의 등록 지연 시간을 줄이며 MH의 매끄러운 핸드오프(smooth handoff) 기능도 지원하여 핸드오프 기간동안의 패킷 전송 오류를 줄일 수 있는 기법이다.

• 한국컴퓨터정보학회논문지
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• 제22권6호
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• pp.95-100
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• 2017

Recently, as stress has become a major threat to people's health, there is a growing interest in wearable stress management services for stress relief. In this paper, we developed a wearable device(Care-on) capable of extracting changeable human voice information at each site and a Healthcare App(S-Manager) that enables stress management in real time using the wearable device. It collects and analyzes variable real-time voice information for each part of the person's body. And It also provides the ability to monitor stress conditions in a mobile environment and provide feedback on the analysis results in step by step in the mobile environment. We tested the developed wearable devices and app in a mobile environment and analyzed the results to confirm their usefulness.