• Kyungpook Mathematical Journal
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• v.57 no.1
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• pp.1-84
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• 2017

In this paper we study the Fibonacci numbers and derive some interesting properties and recurrence relations. We prove some charecterizations for $F_p$, where p is a prime of a certain type. We also define period of a Fibonacci sequence modulo an integer, m and derive certain interesting properties related to them. Afterwards, we derive some new properties of a class of generalized Fibonacci numbers. In the last part of the paper we introduce some generalized Fibonacci polynomial sequences and we derive some results related to them.

• ETRI Journal
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• v.36 no.5
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• pp.808-818
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• 2014

To deal with the major challenges of embedded sensor networks, we consider the use of magnetic fields as a means of reliably transferring both information and power to embedded sensors. We focus on a power allocation strategy for an orthogonal frequency-division multiplexing system to maximize the transferred power under the required information capacity and total available power constraints. First, we consider the case of a co-receiver, where information and power can be extracted from the same signal. In this case, we find an optimal power allocation (OPA) and provide the upper bound of achievable transferred power and capacity pairs. However, the exact calculation of the OPA is computationally complex. Thus, we propose a low-complexity power reallocation algorithm. For practical consideration, we consider the case of a separated receiver (where information and power are transferred separately through different resources) and propose two heuristic power allocation algorithms. Through simulations using the Agilent Advanced Design System and Ansoft High Frequency Structure Simulator, we validate the magnetic-inductive channel characteristic. In addition, we show the performances of the proposed algorithms by providing achievable ${\eta}$-C regions.

• Asia pacific journal of information systems
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• v.15 no.4
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• pp.153-164
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• 2005

Nowadays, large amounts of XML documents are available in the Internet. Thus, we need to analyze them multidimensionally in the same way as relational data. In this paper, we propose a new framework for multidimensional analysis of XML documents, which we call XML-OLAP. We base XML-OLAP on XML warehouses where all fact and dimension data are stored as XML documents. We build XML cubes from XML warehouses. We propose a new OLAP language for XML cubes, which we call XML-MDX. XML-MDX statements target XML cubes and use XQuery expressions to designate measure, axis and slicer. They incorporate text mining operations for aggregating text data. We apply XML-OLAP to the United States patent XML warehouse to demonstrate multidimensional analysis of XML documents.

• Journal of the Korean housing association
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• v.21 no.6
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• pp.43-52
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• 2010

It has applied the design method of face to face dimension, an MC (Modular Coordination) design method, at design steps of an apartment house for standardization of architecture. But It has been still using center line size. A construction limit isn't specific on these center line size, and dead space occurs with excessive gaps as size matching isn't performed well between structural sieve and parts. And above all, measurement before construction isn't to expect standardization, and to increase custom-made furniture. We investigate manufacture of a preferential domestic system kitchen and construction state, and we derive from a problem in viewpoints of standardization for this. And we utilized a reference plane, and we present construction document and design plan in order to solve these problems. And we analyze an effect got by application of the assembly basis aspect that we presented, and we can raise efficiency of standardization of housing and construction industry, and we light ultimately up.

• Journal of Families and Better Life
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• v.20 no.2
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• pp.29-42
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• 2002

In this paper, we investigate the various opportunities of women informatization, which we believe to be major contributors for the high quality of life for women. We first justify various efforts for women informatization, which needs to be based on the analysis of the problems and the status quo. We have also examined the related government policies and programs as well as the programs of non-profit organizations for woman, and identified key problems areas. Integrating the results from this analysis, we have developed the vision and the framework for women informatization. We also give a list of strategic alternatives for improving quality of life through informatization, and promoting full-time housewives to become aggressive information users, information producers and information specialists. We use the expert Delphi method and fish-bone chart analysis to generate the priorities of specific tasks and target-based strategies for successful implementation of women informatization. We conclude this paper with various recommendations for empowering women to enjoy high-quality living through the process of informatization.

• Journal of Korea Society of Digital Industry and Information Management
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• v.10 no.2
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• pp.107-120
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• 2014

In this paper, we suggest a soft keyboard, called easy keypad, that we use only for login information input in smart devices. Especially, as easy keypad is applied to MTS(Mobile Trading System) we suggest easy keypad in MTS. Easy keypad UI in MTS represents 20 letters and users input login information by using 20 letters. We suggest protocol which decides letters represented in easy keypad UI, which is code for users to input login information by using 20 letters. We analyze easy keypad's safe degree for soft keyboard security threat, especially when it comes to point hacking, we suggest comparison among original soft keyboard's safe degree. Also we suggest mathematical fomula for measuring soft keyboard's convenience and then we analyze the result of soft keyboard's convenience by the presented mathematical formula.

• IE interfaces
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• v.20 no.3
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• pp.339-352
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• 2007

Beyond SERVQUAL-based service quality research, we develop a measurement model of public service quality that would provide researchers and practitioners in the public sector with a foundation for systematic investigation and implementation. Firstly, we explore the attributes of public service quality that lead to customer satisfaction by using the critical incident technique (CIT). We identified four dimensions of public service qualities. We also found that the critical attributes of service quality differ according to the types of customers. Secondly, to achieve a high degree of empirical confidence, we conduct statistical tests and analyses on the classification scheme and on the attributes of service quality that we derived from the CIT analysis. Through these analyses, we could remove the redundancy among attributes and group the attributes into new constructs, which are mutually exclusive and exhaustive; we built a more sophisticated measurement model of service quality.

• Journal of Korea Multimedia Society
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• v.23 no.3
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• pp.490-498
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• 2020

This study researched the elements about seafood culture among the archetypes of 『Jasan Urbo』. We built a hypothesis on 100 species of fish presented in 『Jasan Urbo』 to extract archetypes from them. To prove this hypothesis, we analyzed the properties of archetypes according to recipes. Next, we grasped the food preferences of past ages by inspecting 'taste' words of the literature. Finally, we examined the relations between dominant features of cuisine and fish preferences. We have found four attributes of maritime cultural archetypes. Our research has limitations since we could not had accounted the whole fish species of 『Jasan Urbo』. However, we achieved the huge outcome by our research, in which we applied various extraction methods of archetypes and acquired the dominance of maritime cultural archetypes and preferences.

• Journal of the Korean Professional Engineers Association
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• v.30 no.6
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• pp.153-163
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• 1997

In this paper, we explain Production Liability(PL) law and research method of protection and defence of PL law. In introduction, we give some examples of PL law In main issue, we explain more detail PL law. We survey several country PL law, specially U.S.A., EU, Japan whose are deeply related with us as important export country We discuss our country PL status, our country don't legislate PL law until now We have consumer protection law(소비자보호법) which is weaker than PL law but stronger than civil law(민법), We believe that PL law will be legislated within not long time. At last we discuss protection and defence of PL law inside of company and outside of company as PL insurance.

• Proceedings of the Materials Research Society of Korea Conference
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• 2011.05a
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• pp.48.1-48.1
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• 2011

In this presentation, We monitored weather data, such as global irradiance, ambient temperature, temperature of PV module, relative humidity and windspeed for 2 years, for determining accelerated test condition. then, we determined the temperature limit of accelerated test through weather data and FEM analysis. Detailed procedures will be summarized in this work. After analysing outdoor stress such as thermal stress, we decided main failure modes and mechanisms of PV module, especially solder joint of ribbon wire. we carried out the measurement of material properties such as thermal expansion coefficient for planning of accelerated test. we designed accelerated test based on FEM analysis results. we carried out thermal cycling test with 1 cell mini module for 3 months. We monitored the change of electrical performance every 1 week such as Voc, Isc, Pmax, etc. and then, we analized the ribbon wire/electrode intefaces. Detailed results will be summarized in this work.