• 가정과삶의질연구
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• 제7권2호
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• pp.127-144
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• 1989

The resulting rapid urbanization in the several decades caused increasing residential mobility. The purpose of this study is to analyse systematically the effects of residential mobility on the family quality of life and the factors that cause residential mobility. For this purpose, 976 housewives were sampled from the households in Seoul. The data were analysed by such statistical methods as multiple regression, crosstabulation, ANOVA test and path analysis. The main results obtained are as follows; 1) A significant proportion of the urban households are experienced frequent residential mobility. 2) Among the factors that affect residential mobility, the most important factors are family income, tenure type, and residential satisfaction. 3) Residential satisfaction is an important intervening variable in residential mobility. 4) It has been observed that family quality of life was affected by residential mobility patterns. Analysis has revealed that quality of life de eloped remarkably by changing for residential location, especially in education environment for their children.

• JSTS:Journal of Semiconductor Technology and Science
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• 제16권6호
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• pp.867-872
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• 2016

We have investigated the channel mobility of AlGaN/GaN-on-Si recessed-metal-oxide-semiconductor-heterojunction field-effect transistors (recessed-MOS-HFET) with $SiO_2$ gate oxide. Both field-effect mobility and effective mobility for the recessed-MOS channel region were extracted as a function of the effective transverse electric field. The maximum field effect mobility was $380cm^2/V{\cdot}s$ near the threshold voltage. The effective channel mobility at the on-state bias condition was $115cm^2/V{\cdot}s$ at which the effective transverse electric field was 340 kV/cm. The influence of the recessed-MOS region on the overall channel mobility of AlGaN/GaN recessed-MOS-HFETs was also investigated.

• 선박안전
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• 통권23호
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• pp.14-36
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• 2007

In order to prepare for the enforcement of the "ransportation Services Improvement Act for the Mobility Handicapped People" which was passed in parliament in Dec. 2004, various equipments and installations need to be developed to ensure appropriate level of safety for the mobility handicapped to use maritime transport. In this paper, we investigated the current status of domestic passenger vessel usage by the mobility handicapped, to analyse the requirements for amenities necessary for the mobility handicapped and developed accessibility guidelines for amenities for the mobility handicapped persons in order to prepare for the enforcement of the "ransportation Services Improvement Act for the Mobility Handicapped People"

• 대한산업공학회지
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• 제29권4호
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• pp.292-303
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• 2003

An efficient mobility management for mobile stations plays an important role in mobile communication network. Two basic operations of mobility management are location registration and paging. A zone-based registration (ZBR) is implemented in most of mobile communication systems and we consider the mobility management scheme that combines a zone-based registration and a selective paging (SP). We propose new analytical model that can reflect on the characteristics of the ZBR based on 2-dimensional random walk mobility model and more efficient paging schemes considering the proposed model. We evaluate the performance of the mobility management scheme with our mobility model to determine the optimal size of location area that will result in the minimum signaling traffic on radio channels. Numerical results are provided to demonstrate that our mobility model is useful to evaluate the ZBR more exactly.

• 한국통신학회논문지
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• 제28권6B호
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• pp.563-572
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• 2003

차세대 이동 통신망 환경에 Mobile IP 방식을 적용하였을 경우 빈번히 발생하는 핸드오프로 인한 재등록 과정의 오버헤드 증가와 등록 시의 지연으로 인한 패킷 손실 증가 등의 마이크로 이동성(micro-mobility) 문제가 발생할 수 있다. 본 논문에서는 이 문제의 해결을 위해 IP 기반 무선 액세스 망에서 마이크로 이동성을 효율적으로 지원하는 ANMM(Access Network Mobility Management) 방식을 제안한다. ANMM 방식은 액세스 망 내에서 노드가 이동할 때 발생하는 핸드오프 등록 과정을 액세스 망 자체적으로 처리하여 등록 지연과 시그널링 오버헤드를 감소시킨다. 또한 핸드오프 시의 무선 구간에서의 시그널링을 최소화하여 무선 자원의 낭비를 줄일 수 있다.

• 생물정신의학
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• 제28권1호
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• pp.7-12
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• 2021

Considering that the aged population increases and the mobility problem is pointed out as a factor that indisposes the quality of life, cognition, and mood, it is important to understand and evaluate the elderly's mobility. Factors that deteriorate mobility in the elderly include physical senility, various health changes including chronic diseases, polypharmacy as well as anticholinergics. Common mobility problems in old age are reduced gait speed, increased gait variability in walking length, careless walking, and frequent falls. Several studies have reported that decreased mobility and deterioration of gait can predict cognitive decline and emotional problems. Aerobic exercise, resistance exercise, and balance exercise are suggested as therapeutic interventions for mobility problems. Active correction for factors that reduce mobility in the elderly and prescribing physical activity can conserve the elderly's quality of life and help improve cognition and mood. There is a need for related research in the future.

• Journal of information and communication convergence engineering
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• 제17권2호
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• pp.97-104
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• 2019

Distributed mobility management (DMM) does not use a centralized device. Its mobility functions are distributed among routers; therefore, the mobility services are not limited to the performance and reliability of specific mobility management equipment. The DMM scheme has been studied as a partially distributed architecture, which distributes only a packet delivery domain in combination with the software defined network (SDN) technology that separates the packet delivery and control areas. Particularly, a separated control area is advantageous in introducing a new service, thereby optimizing the network by recognizing the entire network situation and taking an optimal decision. The SDN-based mobility management scheme is studied as a method to optimize the packet delivery path whenever a mobile node moves; however, it results in excessive signaling processing cost. To reduce the high signaling cost, we propose a hybrid distributed mobility management method and analyze its performance mathematically.

• 대한지리학회지
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• 제30권2호
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• pp.120-131
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• 1995

이동행태를 분석하기 위해 시.공간이론 중 3가지 제약조건인 능력제약, 조합제약, 권위제약이 공간특성에 따라 성별, 연령이 이동에 어느 정도 영향을 주는지를 분석하고 적 정 이동군집수를 결정하고자 한다. 이중 권위제약은 사회적 제약조건으로서 도시시설물이나 교통수단의 이용에 있어 사회적 신분이나 규약에 의해 이동영역이 통제되는 것을 의미한다. 공간특성에 의한 이동의 통제는, 도시와 농촌으로 구분하였을 때 도시지역 사람들은 농촌지 역 사람들에 비해 첨두시간대의 이동 참여율이 높으며, 이동군집수 결정에 있어서도 여러 연령층이 유사한 이동행태를 지니고 있음을 알 수 있다. 도시지역 사람들은 공간특성상에 따른 이동의 다양성이 군집수 결정에 상관되었으며, 이는 공간특성에 따라 이동행태가 달라 질 수 있다고 볼 수 있다. 성별 및 연령에 의한 통제 역시 사회적 제약조건으로서 이동행태 에 영향이 있음을 알 수 있다.

• 대중서사연구
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• 제27권3호
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• pp.195-228
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• 2021

이 연구의 목적은 『모빌리티와 푸코』에서 제기하고 있는 새로운 모빌리티 연구방법을 검토하고, 이를 텍스트 분석에 적용해보는 것이다. 이 책은 푸코의 주요 개념을 모빌리티 연구에 적용한 논문 7편을 담고 있어 양쪽 연구 모두에 지적 자극을 주고 있다. 푸코는 이성/비이성, 정상/비정상을 구분하는 기술을 통해 작동한 규율 권력에 대한 탁월한 연구를 보여주었기 때문에, 그의 작업은 감옥으로 대표되는 폐쇄적 공간에 대한 연구처럼 보이기 쉽다. 하지만 『모빌리티와 푸코』의 필자들은 푸코의 작업에 이미 모빌리티에 대한 충분한 연구가 들어있었음에 주목하며 이를 모빌리티 연구에 적극적으로 접목시킨다. 푸코가 말한 통치성이자 장치로서의 모빌리티에 주목했을 때, 모빌리티와 임모빌리티 사이의 긴장감과 역동성이 강조되어 단순한 이분법을 가로지르는 모빌리티 연구의 가능성이 열린다. 본고는 이같은 연구방법을 적용해 김중혁의 소설 <1F/B1>과 김혜진의 단편소설을 분석한다. <1F/B1>은 건물 안에 흡사 갇혀있는 듯 보이는 건물관리인의 서사를 담고 있지만, 소설 속 관리인의 모빌리티는 기성의 통념을 관통하며 새로운 공간을 창출하는 데에로 나아가며, 김혜진의 단편소설 <목화맨션>, <치킨 런>, <줄넘기> 등은 움직이지 못하고 주저하는 모빌리티의 재현을 통해 주체를 구성하는 장치로서의 모비리티를 보여준다. 『모빌리티와 푸코』의 연구를 참조했을 때 우리는 텍스트 속 모빌리티와 임모빌리티의 역동성에 주목하여 서사를 재독하게 된다. 이 연구는 모빌리티 텍스트 연구를 새롭게 확장한다는 데에 의의가 있다. 그간 모빌리티 연구를 적용한 텍스트 분석은 대개 여행기나 표류기, 디아스포라 서사 등 명백하게 이동하는 서사에 집중되어 있었는데, 『모빌리티와 푸코』는 권력과 모빌리티의 관계, 모빌리티와 임모빌리티의 역동성 등에 주목하게 하여 새로운 텍스트 연구를 추동한다. 따라서 이 논문은 아무도 이동하지 않는 것처럼 보이는 서사 속 모빌리티 재현에 주목했을 때 드러나는 텍스트의 새로운 의미를 확인하고, 모빌리티 텍스트 연구 방법의 확장을 모색한다는 의의를 갖는다.

• 유통과학연구
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• 제18권1호
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• pp.107-121
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• 2020

Purpose: Shared mobility services are the most notable in the shared economy; however, they have yet to be activated in Korea due to various regulations and conflicts amongst stakeholders. Nevertheless, shared mobility has become an irresistible trend of the times, as it can cause a great deal of economic and environmental benefits. In this vein, the purpose of this study is to contribute to the revitalization of shared mobility services in Korea and to provide service providers with implications for developing consumer-oriented marketing strategies. Research design, data and methodology: Based on the reasons that the users do not use shared mobility service, the factors influencing the behaviors of shared mobility users are structured and analyzed in a reliable, technical and procedural manner. To this end, the theory of reasoned action (TRA) of Ajzen and Fisbbein, the initial trust model (ITM), task technology fit (TTF) and switching cost (SC) are adopted. A total of 202 questionnaires were collected from the respondents who were aware of shared mobility. Then statistical processing of the collected data used SmartPLS(v.3.2.8), a PLS-SEM (Partial Least Squares Structural Equation Modeling) analysis program. The steps of the analysis are as follows. First, a PLS-Algorithm analysis was performed to evaluate the measurement model, and a Bootstraping and Blindfolding analysis was performed to evaluate the structural model and verify the hypotheses. Second, a multi-group analysis (PLS-MGA) was conducted to further analyze the differences depending on whether or not users experienced shared mobility service. Results: The results showed that initial trusts model (ITM) and task technology fit (TTF) have positive effects on users' behaviors through the mediation of the intention to use. As opposed to the assumption, switching costs did not have negative moderating effects in relation to the intention to use and users' behaviors. The influence of IT self-efficacy was significant, depending on the prior experience to use shared mobility services. Conclusions: This study will contribute to the revitalization of domestic shared mobility services and the formulation of service providers' marketing strategies. In future studies, there is a need to explore, reconstruct, and validate factors other than the impact factors of the shared mobility services used in this research model.