• 대한안전경영과학회지
• /
• 제15권4호
• /
• pp.407-416
• /
• 2013

This paper proposes an approach to analyzing the relationship between technology and services, and to identifying promising service areas for technology-based firms with the analysis of business model (BM) patents. First, BM patents and technology patents are collected and classified into their relevant categories, respectively. Second, patent citation analysis is conducted to analyze the linkage and impacts between each technology and service field at macro level. Third, as a micro level analysis, patent co-classification analysis is employed to identify the interrelationships among specific technology and service areas. Finally, the promising service areas for technology-based firms seeking service areas for diversification is investigated with portfolio analysis. The working of the proposed approach is provided with the help of a case study of IT and mobile services. The proposed approach could guide and help managers of technology-based firms to discover the opportunity of the diversification to new areas in emerging service fields.

• 대한산업공학회지
• /
• 제30권4호
• /
• pp.277-284
• /
• 2004

CDMA (Code Division Multiple Access) is a promising air interface technique for digital cellular systems. The soft handoff between base stations is one of many important features of CDMA for the mobile stations crossing the cell boundaries. The service areas of MSC's (Mobile Switching Centers) are defined as the unions of the service areas of the base stations connected to MSC's and are assumed to have hexagonal shapes. An analytical approach to the performance analysis of the link between MSC's for supporting the inter-MSC soft handoff scheme will be developed to obtain the probability that a soft handoff to an adjacent MSC will be blocked due to the shortage of the link capacity. Also, the rate of new connection establishments that are requested by the mobile stations moving to the service area of an MSC according to the inter-MSC soft handoff scheme will be obtained.

• 한국IT서비스학회지
• /
• 제15권4호
• /
• pp.73-83
• /
• 2016

Pedestrian safety was recently highlighted with a yellow carpet, a yellow-colored pavement material prepared for children waiting for signals for pedestrian crossing, without validation of its efficiency in practice. It was a promising device likely to assist highway safety by stimulating pedestrian to step on the yellow-colored area; it was generally called nudge effects. This paper delivers a study conducted to check the effectiveness of yellow carpet in three different aspects in vehicle driver's perspective by applying the newly introduced information technology (IT) service: Visual Attention Software (VAS). It was assumed that VAS developed by 3M in the United States should be able explain the Korean drivers' visual reaction behaviors since technology embedded in VAS was developed based on and proved by other various international countries and continents in the world. A set of pictures was taken at thirteen different field sites in seven school zone areas in the Seoul metropolitan area before and after the installation of a yellow carpet, respectively. Sets of those pictures were analyzed with VAS, and the results were compared based on the selective safety measures: the likely focusing on standing pedestrians (waiting for a pedestrian's green signal time) affected by its background (yellow-colored pavement) contrasting him or her. The test results from a set of before-and-after comparison analyses showed that the placement of yellow carpet would (1) increase 71% of driver's visual attention on pedestrian crossing areas and (2) change the sequential order of visual attention on that area 2.4 steps ahead. The findings would enhance deployment of such promising efficiency and thus increase children safety in pedestrian crossing. The result was promising to highlight the way to support the changes in conservative traffic safety engineering field by applying the advanced IT services, while much robust research was recommended to overcome the limitation of simplification of this study.

• 산업경영시스템학회지
• /
• 제38권4호
• /
• pp.30-38
• /
• 2015

IT security service provides customers with the capability of protecting the networked information asset and infrastructures, and the scope of security service is expanding from a technology-intensive task to a comprehensive protection system for IT environment. To improve the quality of this service, a research model which help assess the quality is required. Several research models have been proposed and used in various service areas, but few cases are found for IT security service. In this work, a research model for the IT security quality has been proposed, based on research models such as SERVQUAL and E-S-QUAL. With the proposed model, factors which affect the service quality and the best quality measure have been identified. And the feasibility of using quantitative measures for quality has been examined. For analysis, structural equation modeling and various statistical methods such as principal component analysis were used. The result shows that satisfaction is the most significant measure affected by the proposed quality factors. Two quality factors, fulfillment and empathy, are the main determinants of the service quality. This leads to a strategy of quality improvement based on factors of emotion and perception, not of technology. The quantitative measures are considered as promising alternative measures, when combined with other measures. In order to design reliable quantitative measures, more work should be done on target processing time and users' expectation. It is hoped that work of this research will provide efficient tools and methods to improve the quality of IT security service and help future research works for other IT service areas.

• Archives of Plastic Surgery
• /
• 제39권6호
• /
• pp.659-662
• /
• 2012

Progressive facial hemiatrophy, also known as Parry-Romberg syndrome, is a progressive and self-limited deformation of the subcutaneous tissue volume on one side of the face that creates craniofacial asymmetry. We present the case of a patient with a five-year history of progressive right facial hemiatrophy, who underwent facial volumetric restoration using cell-assisted lipotransfer (CAL), which consists of an autologous fat graft enriched with adipose-derived stem cells (ASCs) extracted from the same patient. ASCs have the capacity to differentiate into adipocytes. They also promote angiogenesis, release angiogenic growth factors, and some can survive as stem cells. The use of autologous fat as a filler in soft tissue atrophy has been satisfactory in patients with mild and moderate Parry-Romberg syndrome. Currently, CAL has showed promising results in the long term by decreasing the rate of fat reabsorption. The permanence and stability of the graft in all the injected areas has showed that autologous fat grafts enriched with stem cells could be a promising technique for the correction of defects caused by this syndrome.

• 한국산업정보학회논문지
• /
• 제16권5호
• /
• pp.55-62
• /
• 2011

최근 스마트 폰 보급 확대에 의해 위치기반 서비스(LBS)의 범위는 점점 더 확장되고 있고 서비스 또한 고속 이동 통신을 기반으로 매우 개인화되고 다양해지고 있다. 그 중에 위치기반 소셜 네트워크 서비스(LBSNS)는 스마트 폰 등장 이후에 가장 성장성이 기대되는 서비스이다. 본 논문은 스마트 폰의 위치에 기반하여 적응적으로 변화되는 커뮤니티를 형성하는 모델을 연구하고, 형성된 커뮤니티에 대한 적절한 관리와 형성된 커뮤니티 내의 멤버를 자동적으로 추가하거나 삭제할 수 있는 기능을 제공하는 LBSNS 서비스 모델을 제시한다. 또한, 향후 모바일 환경에서 위치기반 소셜 네트워크 서비스의 의미있는 연구방향을 기술한다.

• 디지털융복합연구
• /
• 제12권11호
• /
• pp.183-195
• /
• 2014

본 연구에서는 최근 부상하고 있는 디지털 기술 중 하나인 사물 인터넷(이하 IoT)과 관련하여, 기업들이 사업을 전개할 수 있는 사업화 영역들을 기존 문헌을 토대로 식별하고, 이러한 영역들 중 과연 어떤 영역이 사업화하기에 적합한 지를 파악하기 위해 우선순위를 선정하는 연구를 수행하였다. 구체적으로 본 연구에서는 쌍대비교에 기반한 설문을 통해 국내 IoT 전문가들의 의견을 수렴하였으며, 분석적 계층 프로세스(이하 AHP) 기법을 적용해 IoT 사업화 영역의 우선순위를 도출하였다. 분석 결과, 전체적으로는 '공공안전 & 보안', '자동차 & 교통', '공공사업 & 에너지' 분야가 IoT 기술이 우선 적용될 수 있는 분야로 나타났다. 아울러, IoT의 가치사슬 중 기기, 네트워크, 서비스 분야에 소속되어 있는 전문가들 사이에 사업화 영역의 우선순위를 서로 다르게 판단하고 있음을 발견하였는데, 기기 분야에서는 '공공안전 & 보안' 분야를, 네트워크 분야에서는 '자동차 & 교통'을, 서비스 분야에서는 '공공사업 & 에너지' 분야를 우선시 하는 것으로 나타났다.

• 디지털산업정보학회논문지
• /
• 제10권3호
• /
• pp.49-59
• /
• 2014

The Internet of Things(IoT) is a new promising technology made from a variety of technology. The IoT links the objects or people, then enabling anytime, anywhere connectivity for anything and not only for anyone. Social networking services have changed the way people communicate. Recently, new research challenges in many areas of Internet of things and social networking services are fired. In this paper, we propose things recommendation method using social relationship in social Internet of Things. We study previous researches about social network service, IoT, and social IoT. We proposed SIoT_FW(Social IoT Friendship Weight) using static and a dynamic social friendship weight. Also, our method considers four social relationships (Ownership Object Relationship, Co-Location Object Relationship, Social Object Relationship, Parental Object Relationship). We presents a music device scenario using our proposed method.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2007년도 심포지엄 논문집 정보 및 제어부문
• /
• pp.17-19
• /
• 2007

This paper describe an interactive video object segmentation tool which can be used to generate MPEG-4 video object planes for multimedia broadcasting and enables content based functionalities. In order to apply these functionalities, each frame of video sequence should be represented in terms of video objects. Semiautomatic segmentation can be thought of as a user-assisted segmentation technique. A user can initially mark objects of interest around the real object boundaries. Then the user-guided and selected objects are continuously separated from the unselected areas though time evolution in the image sequences. We proposed method shows very promising result and this encourages the development of object based video editing system.

• ETRI Journal
• /
• 제41권4호
• /
• pp.515-527
• /
• 2019

This paper discusses the design, implementation, and potential use of an ontology-based mobile pediatric consultation and monitoring system, which is a smart healthcare expert system for pediatric patients. The proposed system provides remote consultation and monitoring of pediatric patients during their illness at places distant from medical service areas. The system not only shares instant medical data with a pediatrician but also examines the data as a smart medical assistant to detect any emergency situation. In addition, it uses an inference engine to infer instant suggestions for performing certain initial medical treatment steps when necessary. The applied methodologies and main technical contributions have three aspects: (a) pediatric consultation and monitoring ontology, (b) semantic Web rule knowledge base, and (c) inference engine. Two case studies with real pediatric patients are provided and discussed. The reported results of the applied case studies are promising, and they demonstrate the applicability, effectiveness, and efficiency of the proposed approach.