• 한국의류산업학회지
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• 제24권5호
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• pp.655-665
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• 2022

This study evaluated the validity of a newly developed mobility protocol examining the comfort functions and requirements of personal protective equipment (PPE) for COVID-19 healthcare workers. Eight males (age: 24.7 ± 3.0 y, height: 173.4 ± 2.3 cm, and body weight 69.9 ± 3.7 kg) participated in the following three PPE conditions: (1) Plastic gown ensemble, (2) Level D ensemble, and (3) Powered air purifying respirator (PAPR) ensemble. The mobility protocol consisted of 10 different tasks in addition to donning and doffing. The 10 tasks were repeated twice at an air temperature of 25oC with 74% RH. The results showed significant differences among the three PPE conditions in mean skin temperature, local skin temperatures (the forehead, thigh, calf, and foot), clothing microclimate (the chest and back), thermal sensation, thermal comfort, and humidity sensation, while there were no significant differences in heart rate or total sweat rate. At rest, the subjects felt less warm and more comfortable in the PAPR than in the Level D condition (P<0.05). However, subjective perceptions in the PAPR and Level D conditions became similar as the tasks progressed and mean skin and leg temperature became greater for the PAPR than the Level D condition (P<0.05). An interview was conducted just after completing the mobility test protocol, and suggestions for improving each PPE item were obtained. To sum up, the mobility test protocol was valid for evaluating the comfort functions of PPE for healthcare workers and obtaining requirements for improving the mobility of each PPE item.

• 한국콘텐츠학회논문지
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• 제21권9호
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• pp.471-476
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• 2021

개인교통수단(PM, Personal mobility)이란 신개념 교통수단으로 전기를 이용하여 1인 또는 2인이 이용하는 교통수단이다. 개인교통수단은 목적지까지 차를 타기에는 너무 가깝고 걷기에는 멀게 느껴지는 애매한 거리를 빠르고 편리하게 이동하는 것을 목적으로 한다. 특히 최근에는 전동킥보드 공유서비스가 보편화되면서 시민들에게 큰 호응을 얻고 있다. 그러나 이용자들은 물론 거리의 보행자, 도로의 운전자에게도 위험요소로 작용하고 있어 이에 대한 대안 마련이 필요한 상황이다. 이에 본 연구에서는 안전한 퍼스널모빌리티 이용환경 구축 및 개선 방안을 제시하고자 다음과 같이 연구를 진행하였다. 첫째, 공유 전동킥보드의 GPS 데이터를 기반으로 일상 속 이용실태를 세밀하게 살펴보고 분석하였다. 둘째, 공유 전동킥보드는 시간에 구애받지 않고 어플리케이션으로 직접 대여 반납 할 수 있어 편리하며 이동 할 때 자신의 위치에서 가장 가까운 곳에서 대여하고 목적지 앞까지 도달할 수 있다는 점에서 접근성도 굉장히 높은 편이기 때문에 주된 대여, 반납 장소를 찾고자 분석하였다. 본 연구에서는 이러한 연구 결과를 토대로 무질서한 기기 배치, 이용지역 확장 보다는 사용이 많은 장소에 거치대를 설치하여 대여와 반납에 대한 세심한 접근을 한다면 이용자와 보행자에게 더욱 긍정적인 효과를 불러일으킬 수 있을 것으로 보인다.

• International Journal of Internet, Broadcasting and Communication
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• 제14권1호
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• pp.201-208
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• 2022

As around the world, ground and underground transportation capacity is reaching its limit, centering on urban areas. As urban traffic becomes congested, time and cost are astronomical, and environmental destruction caused by urban pollution is becoming increasingly serious. As a way to solve this problem, the means of flying over the air are in the spotlight as the next generation of future transportation, and the concept of urban air mobility (UAM, Urban Air Mobility) is defined as systematic planning. The development of an electric-powered vertical take-off (eVTOL) aircraft that obtains electric power through a battery using a personal aerial vehicle (PAV) as a means of transportation has accelerated. As the aircraft development of new technology aircraft in the evtol method is actively carried out, the need to prepare systems such as aircraft certification standards, pilot qualification systems, and qualification management is emerging. The Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA), which lead international standards, announced new special technical conditions and temporary regulations SCVTOL-01, respectively. However, the pilot qualification system for operating the uam aircraft has not yet been clearly announced. Therefore, this paper analyzes the recently announced FAA regulations and EASA regulations to identify differences and directions in perspectives on UAMs and study the existing vertical take-off and landing aircraft (VTOL) pilot qualification system to present directions for qualification classification.

• 제어로봇시스템학회논문지
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• 제22권2호
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• pp.97-103
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• 2016

In this paper, a smartphone-controlled personal mobility system (PMS) with semi-autonomous navigation is developed. The proposed PMS moves to waypoints and then reaches the destination where the waypoints and destination are selected by the user using Google maps in a smartphone. The hardware environment consists of a GPS (Global Positioning System) in the smartphone and a compass sensor. In addtion, while it is moving in autonomous mode, the user can intervene and change the direction and speed of the PMS in order to avoid obstacles that may be encountered accidentally in a dynamic environment. That is why it is called "semi-autonomous navigation". Experimental results showed that the proposed PMS is effectively able to migrate to the waypoints and destination in both autonomous and manual modes.

• Journal of Communications and Networks
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• 제5권3호
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• pp.215-221
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• 2003

It is expected that per-user customized services are widely used in next generation Personal Communication Network. To provide personalized services for each call, per-user service profiles are frequently referenced and signaling traffic is considerably large. Since the service calls are requested from the places where user stays, we can expect that the traffic is localized. In this paper, we propose a new service profile replication scheme, named Follow-Me Replication with local Anchor (FMRA). By replicating user's service profile in a user-specific location area, local anchor of each region, the signaling traffic for call and mobility can be distributed to local network. We compared the performance of the FMRA with two typical schemes: Intelligent Network-based !Central scheme and IMT-2000 based full replication scheme, as we refer it to Follow-Me Replication Unconditional (FMRU). Performance results indicate that FMRA lies between Central and FMRU schemes according to call to mobility ratio, and we identified the efficient ranges of CMR for FMRA depending on the various network parameters.

• 정보처리학회논문지C
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• 제17C권2호
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• pp.215-222
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• 2010

휴대 장치용 개인 무선 통신 기술로서의 블루투스(Bluetooth)는 저전력 저비용의 장점을 가진 IEEE 802.15 계열 WPAN(Wireless Personal Area Network) 기술의 대표적인 예로서 많이 사용되고 있으나 매우 제한된 통신 범위로 인해 넓은 지역에 분포되어 있는 사용자간의 네트워크 구성이 어려운 문제가 있다. 본 논문에서는 사용자의 움직임을 이용하여 인프라(infra)가 없이도 넓은 지역에 분포되어 있는 구성원 간 모바일 소셜네트워크 시스템(Mobile Social Network System, SNS)을 구축할 수 있는 방안을 모색한다. 또한 SNS 환경에서 사용자 움직임 기반 정보확산 기법의 효율성을 검증하기 위하여 실제로 블루마켓 응용을 구현하였다.

• 교통기술과정책
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• 제9권5호
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• pp.38-47
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• 2012

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문집
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• pp.358-362
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• 2002

The HDD unbalance, with higher rotational speed, is directly influenced by the mechanical assembly allowance between clamping disk and platter disk. The low frequency structural vibration induced by the unbalance force finally gives rise to the structure borne noise of the personal computer. To meet the noise and vibration requirements, the absolute unbalance mass of HDD needs to be measured and adjusted in the disk assembling stage. This study introduces the measurement methods of the absolute magnitude and position of the unbalance mass of HDD based on the mobility and acceleration orbit. The absolute unbalance mass can be obtained by the acceleration responses and the mobility of the mechanical part, while the position of the unbalance mass ran be obtained by the rotation acceleration orbit.

• 대한가정학회지
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• 제35권2호
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• pp.95-110
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• 1997

The purpose of this study were 1) to identity housing fund by the type of housing mobility and 2) to analyze the variable contributing to housing fund by the type of housing mobility. For these purposes, the 1993 KHPSD data was used and the sample in this study consisted of 2,796 couple households. Statistics employed for the analysis were frequencies, means, univariate analysis and multiple regression analysis. As the results, the composition and the amount of housing fund according to the type of housing mobility, were different respectively. Housing fund was consisted of previous housing sales price, savings deposits, loans, inheritance, subsidy, and personal debts. Households who already own houses used housing finance for their housing fund easily while renters were at a disadvantage to use housing finance. Moreover, among the contributing factors, home ownership, number of family member, residence, average monthly income, average monthly expenditure, husband's education attainment, satisfaction with housing, husband's job, and the type fo housing were positively associated with the amounts of housing funds. However, duration fo residence tended to negatively related to the amounts of housing funds.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.804-809
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• 2004

Intelligence is thought to be related to interaction rather than a deep but passive thinking. Interactive tangible media "iT_Media" is proposed to explore these issues. Personal robotics is a major area to investigate these ideas. A new design methodology for personal and emotional robotics is proposed. Sciences of the artificial and intelligence have been investigated. A short history of artificial intelligence is presented in terms of logic, heuristic, and mobility; a science of intelligence is presented in terms of imitation and understanding; intelligence issues for robotics and intelligence measures are described. A design methodology for personal robots based on science of emotion is investigated. We investigate three different aspects of design: visceral, behavioral, reflective. We also discuss affect and emotion in robots, robots that sense emotion, robots that induce emotion in people, and implications and ethical issues of emotional robots. Personal robotics for the elderly seems to be a major area in which to explore these ideas.