• 한국안전학회지
• /
• 제14권4호
• /
• pp.114-119
• /
• 1999

When NaOCl was generated and put into sea-water cooling machine in order to overcome the biological hindrances against sea-water cooling machine, it was converted into metallic ion, particularly Ca and Mg, as a hydrate in sea-water and is to stick to electrolyte as a side reaction. This phenomena make the distance between the electrolytes narrow to decrease the flow rate, which induces the local vortex flow which erodes the pole plate. Moreover, this increases the resistance of the electrolyte as well as voltage to decrease the electrolytic efficiency, which has curtailed a chlorine yield and caused a pole plate cut. We are able to overcome these problems by chemical cleaning and intend to extend the life-time of electrolyte and to increase output of the sea-water electrolysis facilities by studying optimal policy regarding chemical cleaning of electrolytic cell. Cleaning time of electrolytic facilities is determined when both increase in electrolytic efficiency and decrease in pole-plate voltage are 10%. At this time as operating current of electrolytic facilities is high, operating time is diminished. Whereas, parameter of end point determination according to cleaning is Mg ionic concentration in solution. When we use Cleaner as a 7wt% HCl, cleaning time is about 80min proper. We are able to maintain pole plate performance by protecting against pole plate cut by means of electrolytic by-product, improve operating rate of facilities, and cut down on maintenance expenditure after acidic cleaning.

• 유통과학연구
• /
• 제16권11호
• /
• pp.21-27
• /
• 2018

Purpose - This study investigates the financial ratio of savings banks and the effect of the ratio having influence upon bankruptcy by quantitative empirical analysis of forecast model to give material of better management and objective evidence of management strategy and way of advancement and risk control. Research design, data, and methodology - The author added two growth indexes, three fluidity indexes, five profitability indexes, and four activity indexes CAMEL rating to not only the balance sheets but also the income statement of thirty savings banks that suspended business from 2011 to 2015 and collected fourteen financial ratio indexes. IBMSPSS VER. 21.0 was used. Results - Variables having influence upon bankruptcy forecast models included total asset increase ratio and operating income increase ratio of growth index and sales to account receivable ratio, and tangible equity ratio and liquidity ratio of liquidity ratio. The study selected total asset operating ratio, and earning and expenditure ratio from profitability index, and receivable turnover ratio of activity index. Conclusions - Financial supervising system should be improved and financial consumers should be protected to develop saving bank and to control risk, and information on financial companies should be strengthened.

• 전자통신동향분석
• /
• 제28권6호
• /
• pp.13-27
• /
• 2013

SDN(Software Defined Network) 기술이 미국을 중심으로 먼저 출발하였으며 NFV(Network Function Virtualization) 기술은 유럽을 중심으로 한 SDN의 경쟁적인 기술로 초기에는 인식이 되었으나, 두 기술의 상호 시너지 효과를 고려하여 2013년 하반기부터는 다양한 형태의 협력 방안들이 표준단체, 산업체 및 캐리어들로부터 소개되고 있다. 두 기술이 지향하는 가장 큰 목표는 하드웨어의 의존성을 배제하고 네트워크 및 서비스를 추상화함으로써 캐리어들이 신규 서비스를 Time-to-Market에 맞게 그러면서도 유연하게 출시하고 제어 및 관리를 중앙집중 방식으로 제공하여 CAPEX(Capital Expenditure) & OPEX(Operating Expense)를 최소화 하는데 있다. 본고에서는 이 두 기술의 표준화 및 기술 동향, 그리고 아직은 태동기인 두 기술이 지향하는 다양한 Use Case들과 적용사례를 캐리어 환경 중심으로 살펴보고 향후 상용화 및 산업화에 대한 장 단기 발전 전망에 대해 기술 중심으로 예측해 본다.

• Journal of Information Technology Applications and Management
• /
• 제23권4호
• /
• pp.83-100
• /
• 2016

In this paper, we present the DEA (Data Envelopment Analysis) application case study to investigate the regionally distinctive telco management characteristics of the Asia-Pacific countries. This study attempts to exploit the implications of DEA for the assessments of core process capabilities of telcos. Accordingly, we extract input variables of CAPEX (capital expenditure), operating expense, marketing expense, and number of employees, each to reflect the competitiveness of the core processes such as fixed asset utilization, operation & sales efficiency, and white collar productivity. In conjunction with the input variables, the output variables are chosen as EBITDA (Earnings Before Interest, Taxes, Depreciation and Amortization), ARPU (Average Revenue per User), and number of subscribers. The computational testing results, conducted with total 37 telcos of the 12 Asia-Pacific countries, are analyzed in various ways to understand the distinctive performance characteristics across the region. The managerial implication captured from this study provides useful insight for using DEA as the international telco management purpose.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 추계학술대회 논문집
• /
• pp.1683-1693
• /
• 2007

Urban has been operating Korail and the local autonomous entity in Korea. Over 70 LRTs will be constructed in the future, but it is hard to manage them due to structural deficit from construction debt, so Public finance plays a very important role in order to overcome a deficit. Therefore, it is necessary to plan detailed analysis and planned system about the expenditure of the amount which is borrowed from country and local government and business income from railroad companies like government grants, PSO. This research wishes to grasp the problem and present model about reasonable and efficient financial program, analyzing about increasing import and expenses of Urban.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 추계학술대회 논문집
• /
• pp.306-312
• /
• 2007

The running safety of rolling stock is assessed by derailment coefficient. It requires lots of preparatory time, expenditure and high measurement technique to measure derailment coefficient. If derailment coefficient could be measured when track or vehicle is maintained, safety will be improved. The measurement and assessment of running safety is necessary for safety especially for the vehicles newly developed and started service. Therefore measurement of derailment coefficient is most important thing to secure running safety. In this paper, we examined new assessment method which could estimate derailment coefficient by measuring vibration acceleration and displacement of vehicle operating at actual track irrespective of time and place. The new method could be used effectively as a mean confirming running safety.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 1999년도 추계학술대회논문집
• /
• pp.19-33
• /
• 1999

This paper is concerned with developing a standard costing model based on the case study of PECT and GCT and analysing their profitability in order to improve operation efficiency and design business strategy. In doing so, the model can be a useful tool to analyze current calculation system of lease charge at the two terminals and to judge whether the level of lease charge currently applied to them is justifiable for their profitability. This paper also deals with break-even analysis of container terminal operating companies on the basis of the model and forecast of their profitability. On the top of that, it tries to look into the arguments and to suggest proposals for improving their profitability.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
• /
• pp.653-656
• /
• 2003

We have designed embedded web sewer system and ported Linux operating system version 2.4.5 at our system. And then We implemented to control and monitor widely separated hardware and implemented to monitor widely separated image using CMOS image sensor HV7131B. Web server is the Boa web server with General Public License. We designed for this system using of Intel's SA1110 ARM core base processor and connecting input and output device at GPIO port of SA1110. Device driver of General purpose I/O for Embedded Linux OS is designed. And then the application program controlling driver is implemented to use of common gate interface C language. User is available to control and monitor at client PC. This method have benefit to reduce the Expenditure of hardware design and development time against PC base system and have various and capacious application against firmware base system.

• 산업클러스터
• /
• 제1권1호
• /
• pp.16-28
• /
• 2007

본 연구는 수도권 소재 기업들을 대상으로 클러스터의 네트워크 구조가 개별 기업의 R&D 투자에 미치는 영향을 실증적으로 분석한 것이다. 클러스터에 관한 대부분의 기존 연구가 네트워크의 구축과 운영에 관심을 집중하고 있는 것에 비해 본 연구는 구축된 네트워크에서의 지식교류 및 경쟁 강도가 개별 기업의 R&D 투자에 미치는 영향을 분석하였다는 점에서 연구 의의를 찾을 수 있다. 수도권 지역의 자동차부품, 제약, 인쇄회로기판산업을 대상으로 한 분석 결과, 지식교류의 강도가 강한 기업일수록 R&D 투자를 증가시키는 것으로 나타났다. 그러나 경쟁이 개별 기업의 R&D 투자를 증가시킨다는 가설은 실증적으로 지지되지 않는 것으로 나타났다. 이상의 분석결과로부터 지식교류의 기회를 넓혀주는 클러스터 정책을 지속적으로 추진하고 기업 간 가격 경쟁을 기술개발경쟁으로 전환하는 것이 필요하다는 시사점을 얻을 수 있다.

• 한국산학기술학회논문지
• /
• 제20권11호
• /
• pp.487-493
• /
• 2019

본 연구는 제약기업대상 연구개발비 무형자산비중을 살펴보고, 무형자산화 비중이 기업 가치에 영향을 미치는지 코스닥제약기업 중심으로 살펴보았다. 연구대상은 2011년부터 2017년까지 코스닥에 상장된 연도별, 기업별 연구개발비 회계자료가 있는 제약기업 39개를 표본으로 종속변수로 토빈Q, 독립변수로 연구개발비 무형자산화 비중으로 설계하여 패널데이터모형으로 분석하였다. 결론은 코스닥제약기업은 연구개발비 무형자산화 비중이 토빈Q(기업가치)에 부정적인 영향을 미치는 것으로 나타났다. 연구개발비 무형자산비중이 클수록 코스닥 제약기업에서는 기업가치가 낮아질 수 있다는 시사점을 제공한다. 즉, 코스닥 제약기업에서는 부채비율이 높을수록 투자규모를 늘리는 현상을 반영하기에 무형자산 비중이 커진다고 해서 기업가치가 증가하지 않는다는 것으로 설명할 수 있다. 본 연구는 기존 연구들은 연구개발비 총액을 기업 가치와 관련성을 규명한 연구들이 대부분인 반면, 연구개발비를 좀 더 세분화해서 '무형자산화 비중'만을 놓고, 코스닥 제약기업의 기업 가치에 영향을 미치는지 여부를 연구했다는 데 그 의의가 있다.