• KDI Journal of Economic Policy
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• v.17 no.3
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• pp.55-128
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• 1995

본고(本稿)에서는 지난 1973~93년 기간동안 제조업부문에서의 고용(雇傭), 임금(賃金), 생산성(生産性) 등의 변화추이(變化推移)에 대한 분석을 통하여 우리나라 중소제조업(中小製造業)의 세가지 특징적(特徵的)인 팽창양식(膨脹樣式)으로 (1)급격한 양적(量的) 팽창(膨脹), (2)중소기업(中小企業)과 대기업(大企業)간 임금(賃金) 생산성(生産性) 격차(隔差)의 거대(據大), (3)산업조정(産業調整)에 따른 고용조정(雇傭調整) 등에 주목(注目)하였다. 이러한 중소제조업 고용의 동태적인 변화에 대한 이해를 바탕으로 최근 심각히 부각되고 있는 중소제조업 생산직의 인력부족문제를 단순히 '노동(勞動)에 대한 초과수요(超過需要)'로 파악하는 정태적(靜態的)인 관점(觀點)을 비판하였으며, 또한 중소기업 인력(人力)의 질(質)이 대기업(大企業)에 비하여 상대적으로 저하되었음을 보임으로써 중소제조업(中小製造業) 고용문제(雇傭問題)의 핵심은 양적(量的)인 부족(不足)이 아니라 '인력(人力)의 질(質)'의 문제임을 강조하였다. 특히 우리나라 인력개발체계가 국가적(國家的)으로 직업자격(職業資格)을 갖춘 중간기술인력(中間技術人力)을 제대로 배출해 내는 데 실패함으로써, 대기업에 비하여 종업원에 대한 교육훈련에 있어서 규모의 경제를 갖지 못하는 중소기업의 경우 질 높은 인력의 확보에 어려움을 겪는 데 문제의 심각성이 있음을 지적하였다. 또한 본고(本稿)에서는 우리나라의 중소기업(中小企業)이 생산현장(生産現場)에서 바로 활용할 수 있는 직업자격(職業資格)을 갖춘 중간기술인력(中間技術人力)을 제대로 공급할 수 있도록, (1)직업기술교육(職業技術敎育), 직업훈련(職業訓練), 자격제도(資格制度)간의 연계(連繫) 강화(强化), (2)새로운 국가기술자격제도(國家技術資格制度)의 확립(確立), (3)인력개발(人力開發)네트워크의 구축(構築), (4)인력개발지원체계(人力開發支援體系)의 정비(整備) 등 네가지를 기본방향(基本方向)으로 하는 우리나라 인력개발체계(人力開發體系)의 전반적(全般的)인 개편(改編)을 제언(提言)하였다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.42 no.1
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• pp.233-240
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• 2017

Due to a recent rise in use of a wireless keyboard and mouse, attacks which take user's input information or control user's computer remotely exploiting the physical vulnerability in the wireless communication have been reported. Especially, MouseJack, announced by Bastille Network, attacks 2.4 GHz wireless keyboards and mice through exploiting vulnerability of each manufacturer's receiver. Unlike other attacks that have been revealed, this allows to attack AES wireless keyboards. Nonetheless, there is only a brief overview of the attack but no detailed information on this attacking method. Therefore, in this paper we will analyze the Microsoft 2.4 GHz wireless mouse packet and propose a way to set the packet configuration for HID packet injection simulating a wireless mouse. We also develop a system with 2.4 GHz AES wireless keyboard HID packet injection using the proposed packet and demonstrate via experiment that HID packet injection is possible through the system we built.

• Journal of the Economic Geographical Society of Korea
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• v.17 no.4
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• pp.688-701
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• 2014

This article is focused on the agglomeration and decline factors of the footwear industries in Busan metropolitan area from the industrial cluster point of perspective. For the research, 'the components and network of industrial cluster model' are presented which is restructured of M. Porter's cluster model. Moreover, this research have examined the agglomeration and decline process of the footwear industries in Busan area and conducted a survey targeting footwear enterprises in Busan area. In the late 1980's, the footwear industries in Busan area formed the largest footwear industrial cluster in the world. However, the industrial cluster started to decline from early 1990's and now it is reduced in to 1/10 size of the past. The growth factors of Busan footwear industrial cluster include cheap and plentiful labours, penetration of OEM production, entrepreneur spirit, human resources network, government's support and so on. Moreover, the agglomeration of relative companies also created high competitiveness in this cluster. The decay factors are pointed out sudden rise of labour cost, shortage of factory site, rise of land price, alteration of government policy, international relocation of footwear production and growth of overseas industrial cluster. Busan footwear industrial cluster nowadays has declined in its size, but it is the only footwear industrial cluster in Korea.

• Journal of Digital Contents Society
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• v.8 no.1
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• pp.17-25
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• 2007

Recently, the ubiquitous computing environment being able to connect all kinds of computing elements at anytime anywhere becomes widespread in human life. In this paper, we focus on a PC remote control system using cellular phones. Especially, we design and implement an mobile e-mail transmission system using PC remote control technique. By using our remote controller, cellular phone users can login into their own PC, and then send any file to others by e-mail attachment. To show the correct running of our system, real demonstration results are presented. We are sure that by opening our source code to the public our results can play an important role to encourage development of the various mobile remote control functionalities.

• KIPS Transactions on Computer and Communication Systems
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• v.6 no.5
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• pp.231-238
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• 2017

A Class B device in LoRaWAN periodically receives a Beacon message from a gateway for synchronization, and it also periodically activates a ping slot to receive data from the server. In this paper, we save energy consumption by controlling the beacon-less operation which is immediately started on the packet loss. In addition, we propose a method that the server inactivates the ping slots of a device according to the amount of messages, which have to be received from the server, to save energy consumption resulting from activated but unused empty slots. The experiment with the 20% of packet loss rate showed that the reduced beacon-less operation and the inactivation of the ping slot decrease the energy consumption by 96.7% and 60% as compared to the existing method.

• Korean Security Journal
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• no.52
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• pp.145-162
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• 2017

In 2005, the Republic of Korea suffered from the outbreak of MERS(Middle East respiratory syndrome), leaving 186 infectees and 38 casualties. Responding to this crisis, Korean government revealed many problems in emergency management policies and was widely criticized. A similar case in emergency management and infectious disease control is the 1999 outbreak of West Nile Virus(WNV) outbreak in the United States. During this period, the state of Oregon effectively responded to WNV through collaboration between state and local government, being considered as a model case of emergency management. This article aims to find insights in emergency management and infectious disease control by analyzing and comparing the responses of Korean MERS outbreak and Oregon's WNV outbreak focusing on interorganizational collaboration. Insights found in this study include the role of control tower, the importance of information sharing and disclosure, the role of existing systems and social networks, and sustainable intergovernmental collaboration.

• Information and Communications Magazine
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• v.30 no.12
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• pp.37-50
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• 2013

아이폰을 비롯한 새로운 스마트 기기의 도입으로 촉발된 폭발적인 데이터 트래픽의 증가는 사회.경제적으로 큰 변화를 가져 왔으며, 앞으로도 그 추세가 계속될 것으로 예측되고 있다. 국내의 경우 증가하는 데이터 트래픽을 수용하기 위해 10MHz의 LTE 시스템을 도입하여 상용 서비스를 시작한 바 있으며, 올해 하반기부터는 20MHz의 광대역 LTE 서비스와 함께 2개의 반송파를 집성하는 CA(Carrier Aggregation) 기술이 적용된 LTE-Advanced, 즉 4G 상용 서비스를 이미 개시하였다. LTE 상용 서비스가 본격화 되기 시작하면서 제조업체와 대학, 연구소 등을 중심으로 다음 세대 이동통신 기술에 대한 관심이 보다 높아졌으며, 최근 LTE-Advanced 상용 서비스 개시를 계기로 5G 이동통신에 대한 논의가 본격적으로 시작되고 있다. ITU-R WP(Working Party) 5D는 2012년 7월에 개최된 제13차 회의에서 2020년 및 그 이후의 미래 IMT 시스템을 위한 비전(Vision) 및 기술동향 연구를 수행하기로 결정하였으며, 2013년부터 본격적인 연구에 착수하여 미래 IMT 기술동향 보고서와 미래 IMT 비전 권고를 각각 2014년과 2015년까지 개발할 계획이다. 이와 관련하여 3GPP와 IEEE 802도 현재 표준화가 진행되거나 진행 예정인 최신 기술들을 중심으로 미래 IMT 기술동향 보고서에 대한 기고를 제출하였다. 향후 ITU-R WP 5D는 전례로 볼 때 현재 진행 중인 2020년 및 그 이후의 미래 IMT 시스템을 위한 비전 및 기술동향 연구 작업이 마무리하면, 4G인 IMT-Advanced의 경우와 마찬가지로 5G의 기술적 요구사항을 정의하고, 5G 후보 기술규격을 외부 표준화 기구들로부터 제안 받아 5G 기술로 승인하는 과정을 밟게 될 것이며, 이후 이 요구사항을 만족하는 시스템을 5G 이동통신 시스템이라고 명명하게 될 것이다. 5G 이동통신 시스템에 대한 요구사항은 다양한 의견 교류를 통해 큰 틀에서 컨센서스를 이루어가는 중이며, 이러한 내용이 ITU-R WP 5D의 기술적 요구사항에 반영되어 보다 구체화 될 것이다. 반면 5G에 대한 기술적 접근방법에 대해서는 여러 시각들이 존재하는 것이 사실이나, 현재 이에 대한 논의가 활발히 진행되고 있으며, 결국은 관련 표준화 기구들에서의 논의를 통해 그 접근방법이 최종적으로 결정될 것으로 보인다. 본 고에서는 먼저 5G 이동통신 요구사항과 4G 이후의 표준화 기술에 대해 살펴 본 후, 향후 이동통신 기술이 어떤 시나리오에 따라 발전할 것인지, 5G 네트워크는 어떤 구조를 갖게 될지, 그리고 어떤 기술이 적용될 지 등에 대해 개인적인 시각에서 전망해보고자 한다.

• Spatial Information Research
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• v.17 no.4
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• pp.405-416
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• 2009

According to the changes of the city's paradigm, the demand on u-City increases rapidly. u-City has been built at 54 areas in Korea (as of May 2009). One of the important determinants of success or failure in the increasing of u-City is how to provide u-Services. Most current u-Services are Sensor Network-based monitoring services to manage urban infrastructure. u-GIS is one of fundamental requirements to implement 'any time and any where' u-Service which covers the essential meaningful term "ubiquitous". Hence, in this paper, we 1) describe the definition of the spatial awareness, 2) discuss how to converge (Spatial Embedding) among different spatial data : topographic spatial data, sensor spatial data, and more, 3) bring forth an advanced form of u-Service, 4) analyze the state-of-the-art u-GIS techniques.

• Journal of Digital Contents Society
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• v.13 no.2
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• pp.197-203
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• 2012

Although the increase in number of the programs provides rich entertainment to viewers, it also has caused a negative of making it hard for viewers to find out their favorite programs. To address the problem, several researches have been performed mainly focusing on the technologies to analyze a viewer's TV watching-patterns and to recommend a program (or a channel) based on the analysis when a viewer changes channels. The researches, however, have the trouble of frequently failing to choose proper programs because, in the real-world broadcasting circumstance, the programs are re-broadcast over a number of the channels and a set of programs of a genre are usually playing in the overlapped times. To avoid the trouble, the data service, proposed in the paper, allows a viewer to book "explicitly" his/her favorite programs and provides a set of functions of listing up the booked program's broadcasting schedules and reserving viewing or recording the booked programs.

• Journal of the Korea Society of Computer and Information
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• v.16 no.3
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• pp.89-97
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• 2011

In semantic web information system like ontology that access distributed information from network, efficient query processing requires an advanced caching mechanism to reduce the query response time. P2P network system have become an important infra structure in web environment. In P2P network system, when the query is initiated, reducing the demand of data transformation to source peer is important aspect of efficient query processing. Caching of query and query result takes a particular advantage by adding or removing a query term. Many of the answers may already be cached and can be delivered to the user right away. In web environment, semantic caching method has been proposed which manages the cache as a collection of semantic regions. In this paper, we propose the semantic caching technique in cluster environment of peers. Especially, using schema data filtering technique and schema similarity cache replacement method, we enhanced the query processing efficiency.