• 제목/요약/키워드: Scientific process

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A Document-Driven Method for Certifying Scientific Computing Software for Use in Nuclear Safety Analysis

  • Smith, W. Spencer;Koothoor, Nirmitha
    • Nuclear Engineering and Technology
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    • 제48권2호
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    • pp.404-418
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    • 2016
  • This paper presents a documentation and development method to facilitate the certification of scientific computing software used in the safety analysis of nuclear facilities. To study the problems faced during quality assurance and certification activities, a case study was performed on legacy software used for thermal analysis of a fuelpin in a nuclear reactor. Although no errors were uncovered in the code, 27 issues of incompleteness and inconsistency were found with the documentation. This work proposes that software documentation follow a rational process, which includes a software requirements specification following a template that is reusable, maintainable, and understandable. To develop the design and implementation, this paper suggests literate programming as an alternative to traditional structured programming. Literate programming allows for documenting of numerical algorithms and code together in what is termed the literate programmer's manual. This manual is developed with explicit traceability to the software requirements specification. The traceability between the theory, numerical algorithms, and implementation facilitates achieving completeness and consistency, as well as simplifies the process of verification and the associated certification.

Neuroprotective Agents in the Intensive Care Unit -Neuroprotective Agents in ICU -

  • Panahi, Yunes;Mojtahedzadeh, Mojtaba;Najafi, Atabak;Rajaee, Seyyed Mahdi;Torkaman, Mohammad;Sahebkar, Amirhossein
    • 대한약침학회지
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    • 제21권4호
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    • pp.226-240
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    • 2018
  • Neuroprotection or prevention of neuronal loss is a complicated molecular process that is mediated by various cellular pathways. Use of different pharmacological agents as neuroprotectants has been reported especially in the last decades. These neuroprotective agents act through inhibition of inflammatory processes and apoptosis, attenuation of oxidative stress and reduction of free radicals. Control of this injurious molecular process is essential to the reduction of neuronal injuries and is associated with improved functional outcomes and recovery of the patients admitted to the intensive care unit. This study reviews neuroprotective agents and their mechanisms of action against central nervous system damages.

가용자원을 활용한 해외학술정보 데이터베이스제작방법에 관한 연구 (A Study on Construction Method of Foreign Scientific Database by Utilizing Available Information Resources)

  • 노경란;권오진
    • 한국콘텐츠학회:학술대회논문집
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    • 한국콘텐츠학회 2003년도 춘계종합학술대회논문집
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    • pp.323-326
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    • 2003
  • 전통적인 해외학술정보 데이터베이스 제작시스템은 자료의 수집에서부터 DB로딩에 이르기까지 여러 문제들을 내포하고 있다. 본 논문에서는 분산되어 있는 가용자원들로부터 에이전트 기술을 이용하여 필요로 하는 메타데이터를 효율적으로 수집하고 활용하는 데이터베이스 제작모델을 설계하고자 한다. 본 논문은 해외학술정보 데이터베이스를 구성하는 수록정보에 대해 기술하고, 이들 수록정보와 연계된 가용자원들에 대해 살펴본다. 분산되어 있는 가용자원으로부터 메타데이터 구성에 필요한 기본요소를 수집하고, 이 메타데이터에 가공정보를 추가하고, 메타데이터의 품질을 검증하는 과정에 대해 기술한다.

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정책옹호연합모형(ACF)를 적용한 소방과학연구조직 신설에 관한 연구 (A Study on the Newly Established Fire Scientific Research Organization through the Application of Advocacy Coalition Framework)

  • Park, Chanseok
    • 한국재난정보학회 논문집
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    • 제10권4호
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    • pp.528-535
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    • 2014
  • 이 글은 옹호연합모형(Advocacy Coalition Framework)을 통해 소방과학연구조직 신설과정에 적용 및 소방조직 발전을 위한 소방옹호연합 능력을 배양하고, 미래지향적인 조직 설계 및 운영 방향 제시를 목적으로 한다.

Probabilistic free vibration analysis of Goland wing

  • Kumar, Sandeep;Onkar, Amit Kumar;Manjuprasad, M.
    • International Journal of Aerospace System Engineering
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    • 제6권2호
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    • pp.1-10
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    • 2019
  • In this paper, the probabilistic free vibration analysis of a geometrically coupled cantilever wing with uncertain material properties is carried out using stochastic finite element (SFEM) based on first order perturbation technique. Here, both stiffness and damping of the system are considered as random parameters. The bending and torsional rigidities are assumed as spatially varying second order Gaussian random fields and represented by Karhunen Loeve (K-L) expansion. Here, the expected value, standard deviation, and probability distribution of random natural frequencies and damping ratios are computed. The results obtained from the present approach are also compared with Monte Carlo simulations (MCS). The results show that the uncertain bending rigidity has more influence on the damping ratio and frequency of modes 1 and 3 while uncertain torsional rigidity has more influence on the damping ratio and frequency of modes 2 and 3.

Theoretical Principles Of Using Innovative Modern Technologies In Higher Education Institutions

  • Komar, Olha;Bazhenkov, Ievgen;Vnukova, Оlga;Kolomoiets, Halyna;Yanchyshyn, Anatolii;Polishchuk, Oksana
    • International Journal of Computer Science & Network Security
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    • 제21권9호
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    • pp.185-190
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    • 2021
  • The article is assigned to a prelude to the joke of effective pedagogical technologies in professional education in the minds of її continuity. Analyzed the definitions "innovation", "technology", "pedagogical technology", "Innovation pedagogical technology". Blocks have been added, which are stored in innovation processes in the light. The significant role of innovation in education is stated. Presented warehouses pedagogical technologies: conceptual, conceptual-processual and professional. The purpose of introducing innovative technologies into the educational process of vocational education institutions has been clarified. The reasons for finding and implementing innovative pedagogical technologies in education are analyzed.

충북지역 오창과학단지의 입지와 기업유형 (A Study on the Location and the Types of Enterprise in Ochang Technopolis in Chungcheongbuk-do(Province), Korea)

  • 전동호;주경식
    • 한국지역지리학회지
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    • 제18권4호
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    • pp.400-413
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    • 2012
  • 본 연구는 지방첨단산업단지의 형성과정과 특성을 살펴보기 위해 오창과학단지를 사례로 입주한 기업체의 업종별, 종사자 수규모별 특성과 기업의 이전과정을 분석하였다. 분석 자료는 기업통계 자료와 기업체들을 대상으로 설문조사 내용이었으며 분석 결과는 다음과 같다. 첫째, 오창과학단지에 입지한 기업체들은 IT산업과 BT산업이 혼재되어 나타났다. 둘째, 오창과학단지 내에 입주한 기업들의 규모별 특성은 대기업보다는 중소규모의 기업체가 많았다. 그리고 입주한 기업들은 새로운 상품을 개발하고 마케팅을 하는 단계에 있으며, 핵심적인 기술이나 벤처 인증을 받은 혁신성이 높은 부품 소재 업체들이 많았다. 셋째 오창과학단지에 입주한 기업들은 수도권과 충청권에서 이주한 기업의 비율이 높았고 본사와 함께 입주한 비율이 70% 이상을 차지했다. 넷째 기업들은 생산품 유형과 기술의 보유 정도에 따라 크게 4가지 유형으로 분류되었다.

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과학 교수 모형의 특징과 적용에 대한 이론적 고찰 (The Theoretical Review of the Feature and Application of Science Teaching Models)

  • 조희형;김희경;윤희숙;이기영
    • 한국과학교육학회지
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    • 제30권5호
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    • pp.557-575
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    • 2010
  • 이 연구는 현재 중 고등학교에서 적용하고 있는 교수 모형을 선택할 때 그 준거로 활용할 수 있는 교수 모형의 특성과 목적을 제시하고자 수행하였다. 교수 모형의 특성과 목적은 수업 모형과 교수 모형에 관한 문헌을 분석하고, 그 결과를 근거로 정리해 제시하였다. 이 연구에서는 지금까지 제시된 수업 모형을 교수 모형에 포함시키고, 교수 모형을 전통적 모형, 과도기적 모형, 현대적 모형으로 분류하고, 현대적 모형을 다시 그 대상에 따라 개념변화 모형과 순환학습 모형으로 구분하였다. 이 논문에서 제시한 네 가지 교수모형의 특성과 목적을 요약하면 다음과 같다. $\cdot$ 전통적 모형: 강의를 통한 과학지식의 교수, 발견법을 통한 과학지식의 습득, 탐구중심 교수-학습 과정을 통한 과학적 탐구 과정 기능의 습득 및 과학적 방법과 탐구 방법을 적용한 문제해결 $\cdot$ 과도기적 모형: 시범실험, 발견법, 탐구적 접근법 을 통한 탐구 과정 기능의 습득, 과학지식의 습득과 분화 및 발달 $\cdot$ 현대적 모형 - 개념변화 모형: 탐구중심 접근법을 통한 과학지식의 분화, 과학개념에 의한 과학 대체 개념의 교환 - 순환학습 모형: 발견 및 탐구를 통한 개념의 분화 및 대체 개념의 교환, 과학적 탐구 과정 기능의 습득 이와 같은 과학 교수 모형의 영역별 특성과 목적은 교수-학습의 목표와 주제에 적절한 교수 모형의 범주를 확인할 때 적용할 수 있다. 과학 교수-학습 현장에서 실제로 적용할 교수 모형을 선정할 때는, 교수할 주제 및 내용과 그 목표에 적절한 영역별 교수 모형의 특성과 목적을 확인한 다음, 그 영역에서 적절한 교수모형을 선정하는 것이 바람직하다. 이 논문에는 실제의 교수 모형을 선정할 때 적용할 수 있는 준거가 각 교수 모형의 특성과 목적의 형태로 기술되어 있다.

A New Approach to the Science Education Assessment Using Partial Credits to Different Science Inquiry Problem Solving Process Types

  • Lee, Hang-Ro;Lim, Cheong-Hwan
    • 한국지구과학회지
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    • 제23권2호
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    • pp.147-153
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    • 2002
  • Reasonable and reliable assessment method is one of the most important issues in science education, Partial credits method is an effective tool for assessing students' science inquiry problem solving. The purposes of this study were to classify the Problem solving types based on the analysis of the thinking Process, and how much the related science concept and the science process skills were used in solving science inquiry problems, and to describe the possibility and rationality of the assessment method that gives partial credit 128 high school seniors were selected and their answers were analyzed to identify science concepts they used to solve each problem, and the result was used as the criterion in the scientific concept test development. Also, to study the science inquiry problem solving type, 152 high school seniors were selected, and protocols were made from audio-taped data of their problem solving process through a think-aloud method and retrospective interviews. In order to get a raw data needed in statistical comparison of reliability, discrimination and the difficulty of the test and the production of the regression equation that determines the ratio of partial credit, 640 students were selected and they were given a science inquiry problem test, a science process skills test, and a scientific concept test. Research result suggested it is more reasonable and reliable to switch to the assessment method that applies partial credit to different problem solving types based on the analysis of the thinking process in problem solving process, instead of the dichotomous credit method.

Bioprocess Development for Production of Alkaline Protease by Bacillus pseudofirmus Mn6 Through Statistical Experimental Designs

  • Abdel-Fattah, Y.R.;El-Enshasy, H.A.;Soliman, N.A.;El-Gendi, H.
    • Journal of Microbiology and Biotechnology
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    • 제19권4호
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    • pp.378-386
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    • 2009
  • A sequential optimization strategy, based on statistical experimental designs, is employed to enhance the production of alkaline protease by a Bacillus pseudofirmus local isolate. To screen the bioprocess parameters significantly influencing the alkaline protease activity, a 2-level Plackett-Burman design was applied. Among 15 variables tested, the pH, peptone, and incubation time were selected based on their high positive significant effect on the protease activity. A near-optimum medium formulation was then obtained that increased the protease yield by more than 5-fold. Thereafter, the response surface methodology(RSM) was adopted to acquire the best process conditions among the selected variables, where a 3-level Box-Behnken design was utilized to create a polynomial quadratic model correlating the relationship between the three variables and the protease activity. The optimal combination of the major medium constituents for alkaline protease production, evaluated using the nonlinear optimization algorithm of EXCEL-Solver, was as follows: pH of 9.5, 2% peptone, and incubation time of 60 h. The predicted optimum alkaline protease activity was 3,213 U/ml/min, which was 6.4 times the activity with the basal medium.