• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 2005년도 추계종합학술대회
• /
• pp.693-696
• /
• 2005

국내의 통신망은 효율적인 유지보수를 위하여 도로를 따라 기반시설이 구축되고 있기 때문에 전력망과 통신망의 교차와 병행이 가속화되고 있다. 전력망은 전력유도를 발생시킬 뿐만 아니라, 낙뢰와 같은 전기적 과도현상으로부터 그 자체가 전송매체로 되기 때문에 전력망 지중 접지체와 통신망 지중 접지체간을 통하여 낙뢰서지 및 지락선 과도 현상이 통신망에 유도되어 악영향을 초래한다. 본 연구에서는 통신망의 보호대책으로 지중접지체간의 이격거리를 통한 귀로전류의 차단과 양쪽 단자의 유휴심선을 접지하여 전력유도전압을 차폐하는 방법이 우수한 효과를 나타냄을 확인 할 수 있었다.

• 경영과학
• /
• 제31권4호
• /
• pp.75-92
• /
• 2014

Broadcast-telecommunication bundling services provide customized services and reduce household telecommunication costs, contributing to the improvement of users' welfare. However, following the recent fierce competition of broadcast-telecommunication providers, the Korea Communications Commission, an organization that regulates promotional gifts and fee-reduction benefits to attract subscribers, has imposed a series of regulations. The excessive offering of promotional gifts can distort fair market competition and damage users. Yet if all bundling services are regulated uniformly, some benefits for users may be reduced, and the autonomous marketing competition of service providers may be restricted, thereby shrinking the entire communications market. Therefore, this study attempts to investigate domestic and foreign regulations on promotional gifts and other offerings related to broadcast-telecommunication bundling services, to analyze problems with respect to the current regulations and to propose an improvement plan. The study asserts that it is necessary to improve the violation decision criteria of the Korea Communications Commission and its regulations on broadcast-telecommunication service providers' promotional gifts in order to regulate the bundling services reasonably. In addition, it proposes a proper regulation of the OTS(Olleh TV Skylife) product, a new service emerging in the evolution of the bundling service type.

• 한국멀티미디어학회논문지
• /
• 제13권2호
• /
• pp.324-331
• /
• 2010

이동통신 시장 규모가 폭발적으로 증가함에 따라 이동통신사 간에 고객 유치 경쟁도 치열하다. 국내 이동통신사들은 좀 더 나은 품질과 서비스로 만족도를 향상시켜 고객을 확보하기 위한 노력을 전개하고 있다. 이에 이동통신 산업의 경쟁력과 부가가치를 높이기 위하여 이동통신사에 대한 만족도 요소와 종합 만족도를 정량적으로 평가할 수 있는 과학적 연구가 필요하다. 본 논문에서는 AHP와 통계적 방법을 이용하여 이러한 만족도를 정량적으로 추정하는 방법을 연구하고 실증분석 하였다. 제안된 방법을 활용하여 소비자들은 양질의 제품과 서비스를 받을 수 있을 것이며 나아가 국내 이동통신은 세계적으로 경쟁력을 확보할 수 있을 것으로 기대한다.

• 품질경영학회지
• /
• 제44권4호
• /
• pp.921-934
• /
• 2016

Purpose: The purpose of this study was to propose useful suggestions by explore the effects of the Mobile Telecommunication service quality on customer satisfaction and Customer Loyalty (Focus on Moderation effect of switching barrier) in Korea Mobile Telecommunication industry. Methods: After reviewing the literature, the structural eqation modeling(SEM) conducted by LISREL 8.53 test the research model. The data was collected from subscriber of mobile telecommunication service by the questionare in Korea. Results: The results of SEM show that Mobile Telecommunication Service Quality have a positive effect on customer satisfaction, and customer satisfaction also have a positive effect on customer loyalty. And switching barrier have a moderation effect between customer satisfaction and customer loyalty. Conclusion: Mobile Telecommunication Service Quality is highly related to Customer Satisfation and Customer Loyalty, so Mobile Telecomunication Company should improve Service Quality especially price-related service quality and process/ human- related service quality. And the company need to get higher the positive Switching Barriers in order to improve Customer Loyalty.

• Journal of the Optical Society of Korea
• /
• 제18권2호
• /
• pp.146-150
• /
• 2014

We propose an experimental holographic imaging scheme combining compressive sensing (CS) theory with digital holography in phase-shifting conditions. We use the Mach-Zehnder interferometer for hologram formation, and apply the compressive sensing (CS) approach to the holography acquisition process. Through projecting the hologram pattern into a digital micro-mirror device (DMD), finally we will acquire the compressive sensing measurements using a photodiode. After receiving the data of two holograms via conventional communication channel, we reconstruct the original object using certain signal recovery algorithms of CS theory and hologram reconstruction techniques, which demonstrated the feasibility of the proposed method.

• 한국전자통신학회논문지
• /
• 제4권1호
• /
• pp.7-13
• /
• 2009

유비쿼터스 정보사회로 발전하고 있는 우리사회에서 정보통신망이 무엇보다 중요한 사회기반 시설이 되었으며, 이를 설계하고 시공하는 기술에 대한 감리는 국가 기간산업의 초석을 다지는 일이라 할 수 있다. 정보사회에서 통신망시설에 심각한 결함이나 문제점이 발생 하면 국민생활의 불편함은 물론 국가 경제에 치명적인 영향을 미칠 수 있다. 이를 예방하기 위해서 정보통신시설의 설계와 공사가 기술기준에 의해 체계적으로 시행되고 있는지를 허가 받은 통신전문가에 의해 감리되어야 한다. 본 논문에서는 정보통시설에 대한 현행 감리제도의 문제점을 살펴보고 품질확보를 위한 정보통신시설의 설계, 시공, 감리 및 운용이 이루어질 수 있도록 하는 제도적인 보완 방안들을 제시하였다.

• Journal of Information Technology Applications and Management
• /
• 제20권4호
• /
• pp.67-81
• /
• 2013

Domestic telecommunication companies have increased in marketing expenditures and capital investments in their plants and equipments. Their expectation for their investment sometimes results in the shrinking of their ARPUs(average revenues per user) as well as decreasing of net profits. Those financial efforts have not always been positive relation with their ARPUs. Since western and european telecommunication industry recently have similar situation with our market where their mobile and network users have been saturated so that no more increased users are estimated. Therefore, this paper aims for first to explore methods maximizing the investments efficiency for the telecommunication company so that we choose bechmarked telecommmunication companies to explore their investment managing situation with resepct to their marketing and capital expenditure. Secondly this paper tried to suggest several public policy guidelines for domestic telecommunication industry. Total seventeen foreign telecommunication companies were selected and data set through official IR as well as AR were chosen. Curvilinear logarithmic regression analysis were tested to obtain elasticities as well as marginal effects. As a result, overspending on the marketing investment showed more negative indicators to their revenues, on the other hand, more investment in the Capex such as network infrastructures and other service facilities were more likely related to positive revenues.

• Electronic Materials Letters
• /
• 제14권6호
• /
• pp.733-738
• /
• 2018

Undoped and Mn-doped $In_2O_3$ films were prepared by radiofrequency magnetron sputtering technique. The effects of Mn doping on the structural and optical properties of as-prepared films were investigated using X-ray diffraction, X-ray photoelectron spectroscopy and ultraviolet-visible spectroscopy. Mn doping can enhance the intensity of (222) peak in Mn-doped $In_2O_3$ thin film, indicating Mn dopant promotes preferred orientation of crystal growth along (222) plane. XPS analyses revealed that the doped Mn ions exist at + 2 oxidation states, substituting for the $In^{3+}$ sites in the $In_2O_3$ lattice. UV-Vis measurements show that the optical band gap $E_g$ decreases from 3.33 to 2.87 eV with Mn doping in $In_2O_3$, implying an increasing sp-d exchange interaction in the film. Our work demonstrates a practical means to manipulate the band gap energy of $In_2O_3$ thin film via Mn impurity doping, and significantly improves the photoelectrochemical activity.

• 대한산업공학회지
• /
• 제34권1호
• /
• pp.13-22
• /
• 2008

This paper gives reviews on current research status in telecommunication network design. Two problems are identified as major research issues. One is the WDM network design problem, where traffic grooming, virtual topology design and routing and wavelength assignment problems are considered. The other is the OSPF weight setting problem which was proposed as a practical method to implement traffic engineering capability in IP networks. After presenting surveys on those problems, we discuss potential challenging research issues in telecommunication network design.

• 한국경영과학회지
• /
• 제22권2호
• /
• pp.169-180
• /
• 1997

In this study, we estimate the multi-service cost function of Korea Telecom in order to characterize the cost structure of the telecommunication industry in Korea. By examining the cost function of Korea Telecom, we show that telecommunication costs of Korea Telecom are subadditive. Therefore, we conclude that a natural monopoly exists in the telecommunication industry in Korea.