• Title/Summary/Keyword: Operating Limitations

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A Study on the Regional Organizations Operating Advanced System of Government Funded Research Institutes (GRIs): From the R&D Service Point of View Quality Using the Kano Model (정부 출연연구기관의 지역조직 운영 효율화 방안에 관한 연구 : 카노모형을 활용한 연구개발서비스품질 향상 관점에서)

  • Kim, Jinwoo;Jung, Yuhan;Choi, Jaekyung;Jung, Jinyong
    • Journal of Korea Technology Innovation Society
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    • v.20 no.2
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    • pp.406-429
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    • 2017
  • Most of the GRI's that are organized and operate a regional. However, the limitations of the building that faces its own innovation system of the area, difficulties in management of the individual institution and community organizations operating in various industries such as inadequate to meet demand. This study examined the quality attributes of the GRI's regional organization's operations and policy improvements on the GRI's key features and regional organizations in the region to suggest future operating efficiency in the consumer's point of view based on the Kano Model and Timko Model. The results showed the different properties depending on the quality of corporate premises, and whether or not its own R&D organization. These results could be used as a basis for future policy design in accordance with GRI's regional organization establishment, operation and evaluation.

Design and Implementation of eRTOS Real-time Operating Systems for Wearable Computers (웨어러블 컴퓨터를 위한 저전력 실시간 운영체제 eRTOS 설계 및 구현)

  • Cho, Moon-Haeng;Choi, Chan-Woo;Lee, Cheol-Hoon
    • The Journal of the Korea Contents Association
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    • v.8 no.9
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    • pp.42-54
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    • 2008
  • In recent years, embedded systems have been expanding their application domains from traditional embedded systems such as military weapons, robots, satellites and digital convergence systems such as celluar phones, PMP(Portable Multimedia Player), PDAs(Personal Digital Assistants) to Next Generation Personal Computers(NGPCs) such as eating PCs, wearable computers. The NGPCs are network-based, human-centric digital information devices diverged from the traditional PCs used mainly for document writing, internet searching and database management. Wearable computers with battery capacity and memory size limitations have to use real-time operating systems with small footprints and low power management techniques to provide user's QoS in spite of hardware constraints. In this paper, we have designed and implemented a low-power RTOS (called eRTOS) for wearable computers. The implemented eRTOS has 18KB footprints and the dynamic power management and the device power management schemes are adapted in it. Experimental results with wearable computer applications show that the low power techniques could save energy up to 47 %.

Ultrafiltration membranes for drinking-water production from low-quality surface water: A case study in Spain

  • Rojas-Serrano, Fatima;Alvarez-Arroyo, Rocio;Perez, Jorge I.;Plaza, Fidel;Garralon, Gloria;Gomez, Miguel A.
    • Membrane and Water Treatment
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    • v.6 no.1
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    • pp.77-94
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    • 2015
  • Ultrafiltration membranes have several advantages over conventional drinking-water treatment. However, this technology presents major limitations, such as irreversible fouling and low removal of natural organic matter. Fouling depends heavily on the raw-water quality as well as on the operating conditions of the process, including flux, permeate recovery, pre-treatment, chemical cleaning, and backwashing. Starting with the premise that the optimisation of operating variables can improve membrane performance, different experiments were conducted in a pilot plant located in Granada (Spain). Several combinations of permeate and backwashing flow rates, backwashing frequencies, and aeration flow rates were tested for low-quality water coming from Genil River with the following results: the effluent quality did not depend on the combination of operating conditions chosen; and the membrane was effective for the removal of microorganisms, turbidity and suspended solids but the yields for the removal of dissolved organic carbon were extremely low. In addition, the threshold transmembrane pressure (-0.7 bar) was reached within a few hours and it was difficult to recover due to the low efficiency of the chemical cleanings. Moreover, greater transmembrane pressure due to fouling also increased the energy consumption, and it was not possible to lower it without compromising the permeate recovery. Finally, the intensification of aeration contributed positively to lengthening the operation times but again raised energy consumption. In light of these findings, the feasibility of ultrafiltration as a single treatment is questioned for low-quality influents.

Organizational Factors Facilitating the Internationalization of Korean Franchising Companies (해외진출 국내 프랜차이즈기업의 조직특성)

  • Lim, Young-Kun;Lee, Dong-Whuy;Kim, Hee-Jung
    • Journal of Global Scholars of Marketing Science
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    • v.19 no.2
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    • pp.40-52
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    • 2009
  • Franchising is one of the fastest growing types of business. It is already popular and well-known in the U.S., and has been growing in many other countries including Korea. Furthermore, many Korean franchising companies have expanded their business overseas actively. According to the data by the Ministry of Industry and Resource, 82 companies out of a sample of 500 franchising companies are already operating in many foreign countries and 48% of them have started their foreign business since 2006. This clearly indicates the fast growing current trend of foreign operation by Korean franchising companies. In spite of the fast growing trend of foreign expansion in the industry, academic research on internationalization of franchising companies is extremely difficult to find. Accordingly, academic research on the issue is necessary and urgent in Korea. Among the various research questions on internationalization of franchising business, this study intends to investigate the difference in organizational factors between the franchising companies doing foreign operation and those doing business only domestically. More specifically, this research has the following purposes. First, considering the lack of theoretical basis of previous studies, resource-based theory and agency theory are employed as the theoretical bases. Second, this study explains the difference in internationalization based on organizational factors such as company size, history and growth rate. Third, the five hypotheses regarding the difference in organizational factors are presented and tested empirically, which is the first attempt in the area of this topic. Finally, the study attempts to clarify the conflicting implications among theories regarding some organizational factos such as growth rate. As the theoretical background, resource-based theory and agency theory are discussed. According to resource-based theory, a firm can grow continuously when it has competence and resource, and also the ability to develop them. The competence and resource can include capital, human resource, management skill, market information, ability to manage risk, etc. Meanwhile, agency theory views the relationship between franchisor and franchisee as an agency relationship. In agency theory, bonding capability and monitoring capability are the two key factors which promote internationalization of franchising companies. Based on the two theories, a conceptual model is designed. The model consists of two groups of variables. One is organizational factors including size, history, growth rate, price bonding and geographic dispersion. The other is whether a franchising company is operating overseas or not. We developed the following five research hypotheses basically describing the relationship between organizational factors and internationalization of franchising companies. H1: The size of franchising companies operating overseas is larger than that of franchising companies operating domestically. H2: The history of franchising companies operating overseas is longer than that of franchising companies operating domestically. H3: The growth rate of franchising companies operating overseas is higher than that of franchising companies operating domestically. H4: The price bonding of franchising companies operating overseas is higher than that of franchising companies operating domestically. H5: The geographic dispersion of franchising companies operating overseas is wider than that of franchising companies operating domestically. Data for the analyses are obtained from 2005 Korea Franchise Survey data co-generated by Ministry of Industry and Resource, GS1 Korea, and Korea Franchise Association. Out of 2,804 population companies, 2,489 companies are excluded for various reasons and 315 companies are selected as the final sample. Prior to hypotheses tests, validity and reliability of the measures of size, history, growth rate and price bonding are examined for further analyses. Geographic dispersion is not validated since it is measured using nominal data. A series of independent sample T-tests is used to find out whether there exists any significant difference between the companies internationalized and those operating only domestically for each organizational factor. Among the five factors, size and geographic dispersion show significant difference, growth rate and price bonding do not reveal any difference and, finally, history factor shows conflicting results in the difference depending on how to measure it.

    shows the summary statistics for hypotheses testing. In conclusion, the results show that the size and history, which are the key variables in resource-based theory, have a significant relationship with internationalization and that geographic area, which belongs to agency theory, also has a strong relationship with internationalization. The results support the findings of extant research and, therefore, prove the usefulness of resource-based theory and agency theory in explaining internationalization of franchising companies. However, growth rate and price-bonding do not show a clear difference between the two types of companies. Accordingly, these two factors need further attention in the future research. Although this study shows meaningful findings theoretically and practically, it has several limitations. First, only organizational factors are considered even if there are various environmental factors influencing franchising firm's internationalization. Second, only being internationalized or not is considered. That is, modes of entry and the size of foreign operations are not included in the study. Third, internationalization strategy is often determined based on the desire for business expansion and higher profitability and egoistical reasons of the CEOs. However, this type of factors belonging to behavioral science is not discussed in the study. Finally, organizational ecology perspective is usefully applicable in explaining the survival and performance of internationally operating companies. Accordingly, research propositions based on this perspective need to be developed and tested.

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  • Bio-sensing Data Synchronization for Peer-to-Peer Smart Watch Systems (피어-투-피어 스마트워치 시스템을 위한 바이오 센싱 데이터 동기화)

    • LEE, Tae-Gyu
      • The Journal of the Convergence on Culture Technology
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      • v.6 no.4
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      • pp.813-818
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      • 2020
    • Recently, with the rapid increase in technology and users of smart devices, the smart watch market has grown, and its utility and usability are continuously expanding. The strengths of smartwatches are wearable portability, application immediacy, data diversity and real-time capability. Despite these strengths, smartwatches have limitations such as battery limitations, display and user interface size limitations, and memory limitations. In addition, there is a need to supplement developers and standard devices, operating system standard models, and killer application modules. In particular, monitoring and application of user's biometric information is becoming a major service for smart watches. The biometric information of such a smart watch generates a large amount of data in real time. In order to advance the biometric information service, stable peer-to-peer transmission of sensing data to a remote smartphone or local server storage must be performed. We propose a synchronization method to ensure wireless remote peer-to-peer transmission stability in a smart watch system. We design a wireless peer-to-peer transmission process based on this synchronization method, analyze asynchronous transmission process and proposed synchronous transmission process, and propose a transmission efficiency method according to an increase in transmission amount.

    Organizational Innovation in the Korean Government via an ICT-based IKM Framework: A focus on the MOFA (정보통신기술 기반 지식정보관리 프레임워크를 통한 한국 정부 조직 혁신에 관한 탐구: 외교부를 중심으로)

    • Jin-kyung Lee
      • Journal of the Korean Society for information Management
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      • v.40 no.2
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      • pp.211-241
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      • 2023
    • With rapidly changing technological implementation of operating systems of businesses, the Ministry of foreign affairs (MOFA) of the Republic of Korea (ROK) has been undergoing digital transformation to its overall operations with the intent to innovate information and knowledge management (IKM) strategies since the mid-2000s. However, assessment as to the effectiveness of implemented IKM has been inadequately analyzed. This study aims to assess the concepts and limitations of the MOFA's current IKM strategies and the methods it employs to deliver its IKM framework, in light of strengthening the organizational ambidexterity and absorptive capacity, and also fostering organizational innovation through a qualitative study that involves interviews and analysis of reports from MOFA. The MOFA's IKM possesses dynamic capabilities to adapt to changing digital technologies. However, the institution's IKM is constrained by limitations associated with the utilization of the IKM system such as a structure that handles confidential documents and a lack of a collaborative system for IKM, and external limitations such as changes in the domestic political situation governing MOFA's priorities and the hierarchy of government organizations. Consequently, developing the organizational ambidexterity and absorptive capacity was not possible. To develop an IKM framework for organizational innovation, the MOFA must devise a way to minimize the impact of external changes by overcoming internal limitations. To that end, a detailed study on the development of a practically usable IKM system should include establishing a dialogue between job groups and enhancing employee competency in preparation for a changing environment.

    High performance and low power sense amplifier design for SONOS flash memory (SONOS 플래시 메모리용 저전력 고성능 Sense amplifier 설계)

    • Jung Jin-Gyo;Jung Young-Wook;Jung Xong-Ho;Kwack Kae-Dal
      • Proceedings of the IEEK Conference
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      • 2004.06b
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      • pp.469-472
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      • 2004
    • In this paper a current mode sense amplifier suitable for 30nm SONOS flash memories read operation is presented. The proposed sense amplifier employs cross coupled latch type circuit and current mirror to amplify signal from selected memory cell. This sense amplifier provides fast response in low voltage and low current dissipation. Simulation results show the sensing delay time and current dissipation for power supply voltages Vdd to expose limitations of the sense amplifier in various operating conditions.

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    Travelling Wave Technique for Close-Up Fault Protection (진행파를 이용한 근접사고 거리계전 방식)

    • Kim, Gon-Wook;Kang, Sang-Hee;Park, Jong-Keun;Kim, Il-Dong;Yun, Man-Cheol;Kwon, Wook-Hyun
      • Proceedings of the KIEE Conference
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      • 1990.11a
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      • pp.202-205
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      • 1990
    • In this paper the development of new technique based on the travelling-wave information contained in the post fault voltage and current signals has been presented. To develop fault location methods which can cope with close-up fault and zero-inception angle problems, magnitude of the backward wave has been used. The technique developed can be incorporated in a generalized algorithm for application as a high speed distance scheme. In this way some of the problems and limitations associated with travelling wave schemes are avoided. Verification of the relay operating principles is presented through digital computer numerical simulation using an electromagnetic transient program(EMTP) in conjunction with simulation of the proposed algorithms.

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    A New Negative Impedance Stabilizing Control Technique for Switching Power Supplies with Constant Power Loads

    • Emadi A.
      • Proceedings of the KIPE Conference
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      • 2001.10a
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      • pp.276-280
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      • 2001
    • In this paper, an approach to the design of negative impedance stabilizing controllers for PWM DC/DC converters that are used in DC switching. power supplies with constant power loads is presented. The control approach is based on the feedback linearization technique. Because of the negative impedance destabilizing characteristics of constant power loads, classical linear control methods have stability limitations around the operating points. However, the proposed stabilizing technique improves large-signal stability and dynamic responses. The proposed controllers are simulated and their responses under different operations are studied. Stability of the control technique is also verified using the second theorem of Lyapunov.

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    A Study on an Equipment Performance Measurement System for Effective Bottleneck Management (병목 설비의 개선 활동에 유용한 설비관리 지표체계에 관한 연구)

    • Lee, Min-Ho;Lim, Sung-Mook
      • Journal of Korean Society of Industrial and Systems Engineering
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      • v.33 no.4
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      • pp.100-113
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      • 2010
    • Manufacturing companies' cost competitiveness with respect to equipment management can be achieved by satisfying additional market demands by their own capacity without purchasing additional equipments. In essence, it can be accomplished by making continuous investigation into bottlenecks and improvement on them. Therefore, equipment performance measure systems should be designed so that they can support manufacturing companies' such endeavors. With the purpose of establishing an effective equipment performance measurement system for detecting and improving bottlenecks, this study (1) suggests some desirable features that such a system should have, (2) evaluates conventional equipment performance measurement systems in terms of their usefulness for the detection and improvement of bottlenecks, and (3) proposes an improved system. We also perform a simulation experiment to demonstrate the limitations of the conventional systems and show how the proposed system can resolve the problems.


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