• Title/Summary/Keyword: project approach

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Software Development Effort Estimation Using Neural Network Model (신경망을 이용한 소프트웨어 개발노력 추정)

  • Lee, Sang-Un
    • The KIPS Transactions:PartD
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    • v.8D no.3
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    • pp.241-246
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    • 2001
  • Area of software measurement in software engineering is active more than thirty years. There is a huge collection of researches but still no a concrete software cost estimation model. If we want to measure the cost-effort of a software project, we need to estimate the size of the software. A number of software metrics are identified in the literature ; the most frequently cited measures are LOC(line of code) and FPA(function point analysis). The FPA approach has features that overcome the major problems with using LOC as a measure of system size. This paper presents an neural networks(NN) models that related software development effort to software size measured in FPs and function element types. The research describes appropriate NN modeling in the context of a case study for 24 software development projects. Also, this paper compared the NN model with a regression analysis model and found the NN model has better estimative accuracy.

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Understanding Epistatic Interactions between Genes Targeted by Non-coding Regulatory Elements in Complex Diseases

  • Sung, Min Kyung;Bang, Hyoeun;Choi, Jung Kyoon
    • Genomics & Informatics
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    • v.12 no.4
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    • pp.181-186
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    • 2014
  • Genome-wide association studies have proven the highly polygenic architecture of complex diseases or traits; therefore, single-locus-based methods are usually unable to detect all involved loci, especially when individual loci exert small effects. Moreover, the majority of associated single-nucleotide polymorphisms resides in non-coding regions, making it difficult to understand their phenotypic contribution. In this work, we studied epistatic interactions associated with three common diseases using Korea Association Resource (KARE) data: type 2 diabetes mellitus (DM), hypertension (HT), and coronary artery disease (CAD). We showed that epistatic single-nucleotide polymorphisms (SNPs) were enriched in enhancers, as well as in DNase I footprints (the Encyclopedia of DNA Elements [ENCODE] Project Consortium 2012), which suggested that the disruption of the regulatory regions where transcription factors bind may be involved in the disease mechanism. Accordingly, to identify the genes affected by the SNPs, we employed whole-genome multiple-cell-type enhancer data which discovered using DNase I profiles and Cap Analysis Gene Expression (CAGE). Assigned genes were significantly enriched in known disease associated gene sets, which were explored based on the literature, suggesting that this approach is useful for detecting relevant affected genes. In our knowledge-based epistatic network, the three diseases share many associated genes and are also closely related with each other through many epistatic interactions. These findings elucidate the genetic basis of the close relationship between DM, HT, and CAD.

Thermo-oxidation behaviour of organic matrix composite materials at high temperatures

  • Cinquin, Jacques;Colin, Xavier;Fayolle, Bruno;Mille, Marion;Terekhina, Svetlana;Chocinski-Arnault, Laurence;Gigliotti, Marco;Grandidier, Jean-Claude;Lafarie-Frenot, Marie-Christine;Minervino, Matteo;Cluzel, Christophe;Daghia, Federica;Ladeveze, Pierre;Zhang, Fangzouh
    • Advances in aircraft and spacecraft science
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    • v.3 no.2
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    • pp.171-195
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    • 2016
  • The present paper is a review of the main activities carried out within the context of the COMPTINN' program, a joint research project founded by a FUI program (Fonds $Unifi{\acute{e}}s$ $Interminist{\acute{e}}riels$) in which four research teams focused on the thermo-oxidation behaviour of HTS-TACTIX carbon-epoxy composite at 'high' temperatures ($120^{\circ}C-180^{\circ}C$). The scientific aim of the COMPTINN' program was to better identify, with a multi-scale approach, the link between the physico-chemical mechanisms involved in thermo-oxidation phenomena, and to provide theoretical and numerical tools for predicting the mechanical behaviour of aged composite materials including damage onset and development.

Methodology for real-time adaptation of tunnels support using the observational method

  • Miranda, Tiago;Dias, Daniel;Pinheiro, Marisa;Eclaircy-Caudron, Stephanie
    • Geomechanics and Engineering
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    • v.8 no.2
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    • pp.153-171
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    • 2015
  • The observational method in tunnel engineering allows the evaluation in real time of the actual conditions of the ground and to take measures if its behavior deviates considerably from predictions. However, it lacks a consistent and structured methodology to use the monitoring data to adapt the support system in real time. The definition of limit criteria above which adaptation is required are not defined and complex inverse analysis procedures (Rechea et al. 2008, Levasseur et al. 2010, Zentar et al. 2001, Lecampion et al. 2002, Finno and Calvello 2005, Goh 1999, Cui and Pan 2012, Deng et al. 2010, Mathew and Lehane 2013, Sharifzadeh et al. 2012, 2013) may be needed to consistently analyze the problem. In this paper a methodology for the real time adaptation of the support systems during tunneling is presented. In a first step limit criteria for displacements and stresses are proposed. The methodology uses graphics that are constructed during the project stage based on parametric calculations to assist in the process and when these graphics are not available, since it is not possible to predict every possible scenario, inverse analysis calculations are carried out. The methodology is applied to the "Bois de Peu" tunnel which is composed by two tubes with over 500 m long. High uncertainty levels existed concerning the heterogeneity of the soil and consequently in the geomechanical design parameters. The methodology was applied in four sections and the results focus on two of them. It is shown that the methodology has potential to be applied in real cases contributing for a consistent approach of a real time adaptation of the support system and highlight the importance of the existence of good quality and specific monitoring data to improve the inverse analysis procedure.

Authors Under the Service of the Army in the Korean War (한국전쟁기 육군종군작가단의 작품 활동)

  • 신영덕
    • Lingua Humanitatis
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    • v.1 no.2
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    • pp.197-217
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    • 2001
  • The literary products of Authors Under the Service of the Army during the Korean War have been neglected on the whole because of the perception that they were little more than war propaganda. The majority of the works (poetry, serial novels, and short stories) Published by these authors in various Army publications such as Junsunmunhak (Literature of the War Front) and Comet, as well as in regular literary periodicals, supports this perception. Most of these works convey simplistic emotions and stereotypes that project untroubled patriotism and strongly antipathetic sentiments against to the Communist North. The appointed leader of this group, Dock-Kyun Choi regarded the pen as another form of weapon to be used against the Communists in the North, and did not shy away from describing in graphic details the atrocities committed by his enemies. But what truly deserves our attention is the fact that many of the same authors who wrote highly propagandistic works also wrote works that can only be described as antiwar. In these works are depicted as faithfully as possible the human sufferings of the war. These works resist and even question the very ideologies that have brought about the conflict, focusing instead on the dark side of the war -the horrifying deaths, the separation of families, and the displacement of people from their homes, How we are to interpret this ambivalence in many of these authors is a task that remains to be carried out. We must approach these works with more seriousness and begin by comparing them with similar products from authors under the service of the Navy and the Air Force during the Korean War.

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A Study on Transition Factor of Audit Opinion (감사의견(監査意見)의 추이요인(推移要因)에 관한 연구(硏究))

  • Chung Youn-Hae
    • Management & Information Systems Review
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    • v.7
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    • pp.141-168
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    • 2001
  • The causes that the transparency of Korean accounting information was rated low, a short supply of faithful and transparent accounting information from the limitation of external audit environment must be pointed out. Purpose of the external audit is a expression of the auditors about that financial statements an enterprise made public were appropriately drew up in accordance with the corporate accounting principles from important point of view. Analysis of the audit opinion and so fourth according to 6,541 individual audit reports and introduced to the bill securities forward committee as a subject of external audit according to the raw of corporation external audit show that considerable change to the contents of audit report. This show as it is that uncertainty of future that is now being faced by our enterprise, because corporation which present audit reports since 1997 because of enterprise dishonor and contents of existence probability as a continued enterprise following to general economic crisis after 1998 occupy important position in special matters of audit report. Also, increase in special matters is due to application of the corporate accounting principles revised on December 11, 1998. In 1999, audit opinion under limitation(limitation, incongruity and rejecting opinion) increased greatly according to existence doubt as a continued enterprise, and this is the consequence of strengthening audit to the continues enterprise because of limited enterprise dishonor according to the stagnancy of business activities after 1997. Now financial supervisory service put in effect electromagnetic public announcement system about a project report of listed corporation (including an audit report) keeping pace with a documentary public announcement system as first phase since 1999 and expand to the unlisted corporation from 2000. As electromagnetic public announcement of public announcement documents including audit documents of external audit subject get a duty, approach of external user to the accounting information will be easier. Fixation of this system will make deep and wide analysis to the audit opinion, and this will draw up a plan to reconsider confidence of accounting information.

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A qualitative evaluation method for engine and its operating-envelope using GSP (Gas turbine Simulation Program)

  • Kyung, Kyu-Hyung;Jun, Yong-Min;Yang, Soo-Seok;Choi, Dong-Whan
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2004.03a
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    • pp.848-853
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    • 2004
  • Regarding to the project SUAV (Smart Unmanned Aerial Vehicle) in KARI (Korea Aerospace Research Institute), several engine configurations has been evaluated. However it's not an easy task to collect all the necessary data of each engine for the analysis. Usually, some kind of modeling technique is required in order to determine the unknown data. In the present paper a qualitative method for reverse engineering is proposed, in order to identify some design patterns and relationships between parameters. The method can be used to estimate several parameters that usually are not provided by the manufacturer. The method consists of modeling an existing engine and through a simulation, compare its transient behavior with its operating envelope. In the simulation several parameters such as thermodynamics, performance, safety and mechanics concerning to the definition of operation-envelope, have been discussed qualitatively. With the model, all engine parameters can be estimated with acceptable accuracy, making possible the study of dependencies among different parameters such as power-turbine total inertia, TIT, take-off time and part load, in order to check if the engine transient performance is within the design criteria. For more realistic approach and more detailed design requirements, it will be necessary to enhance the compressor map first, and more realistic estimated values must be taken into account for intake-loss, bleed-air and auxiliary power extraction. The relative importance of these “unknown” parameters must be evaluated using sensitivity analysis in the future evaluation. Moreover, fluid dynamics, thermal analysis and stress analysis necessary for the resulting life assessment of en engine, will not be addressed here but in a future paper. With the methodology presented in the paper was possible to infer the relationships between operation-envelope and engine parameters.

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A Conceptual Framework for Knowledge Enhanced E-government Portal (지식강화 전자정부포털의 개념적 프레임워크)

  • Kim, Sun-Kyung
    • Informatization Policy
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    • v.20 no.2
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    • pp.39-59
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    • 2013
  • Majority of knowledge management(KM) studies in e-government have been confined to facilitate KM within an organization. But due to citizen-centric(citizen-driven) paradigm shift and advance of web 2.0 communication in recent years, KM between governments and citizen in e-government portals is becoming an important consideration. So a series of studies on knowledge enhanced e-government portal get under way by considering that it is necessary to enhance knowledge of e-government portal and assuming it improves the usability of portal. While the topics of knowledge enhancement and e-government(portal) are widely discussed in their own domains there is a paucity of studies that address these constructs in a joint context. This paper aims to propose conceptual framework of knowledge enhanced e-government portal through structuralization of theoretical discussion with holistic approach. This framework presents an evolutional path of knowledge enhanced e-government portal that consists of three phases and it will be used for realizing the knowledge enhanced portal project as a basic reference model.

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An Analysis on the Occupational Index Status and Prospect Perception to Librarian as Job in South Korea (사서직의 직업지표 현황 및 전망 인식 분석 연구)

  • Lee, Jong-Moon
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.24 no.3
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    • pp.99-120
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    • 2013
  • This study aimed to propose the approach to identify and solve the problems by analyzing the present occupation index of librarians and the future occupation index of librarians after 10 years through the comparison with other jobs. In accordance with the investigation on the LIS students and librarians, the present wage level and the estimated wage level after 10 years were lower than that for other jobs and the employment demand was also lower. Both the students(58.4%) and the librarians(64.2%) considered that the number of full-time employment and the turnover were lower than other jobs. As a result of the analysis, first, this paper proposed to change part-time workers into full-time workers for improving the low wage issue of librarians. Second, '1 public library per 50,000 citizen' was suggested to increase the employment of librarians. Finally, it is proposed to cancel the project to contract out the operation of public libraries and BTL implementation.

An Extraction and Analysis of Problem Areas for BTL Projects from the Practical Perspective (실무적 관점에서의 BTL사업 문제영역 도출 및 분석)

  • Kim, Soo-Yong;Son, Myung-Chan;Yang, Jin-Kook
    • Korean Journal of Construction Engineering and Management
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    • v.14 no.3
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    • pp.157-166
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    • 2013
  • Unlike conventional BTO(Build-Transfer-Operate) projects, this BTL project aims at fixing the financial deficiencies of the government and expanding infrastructure through private capital. It allows the government to attract private capital for the construction of public facilities such as schools and social welfare agencies for whom private users don't need to pay, thereby bolstering national finance. BTL projects are causing a variety problems in progress. Therefore, we are required a practical approach to can improving a variety problems. In this study, we were derive the problem areas as follow. First, research data on the problem of domestic BTL projects, Second, high-performing foreign data analysis than domestic. And, we were analyzed to systematic management method for problem areas by using affinity techniques, matrix comparison analysis, AHP technique. Results of this study are expected provide management standards through real problem areas and the analyzing of relatively importance.