• 제목/요약/키워드: scientific evidence

검색결과 689건 처리시간 0.025초

초등학생의 증거에 기반한 과학적 설명의 수정 과정 고찰 (Elementary Students' Modification of Their Scientific Explanations based on the Evidences in Water Rising in Burning Candle Inquiry)

  • 임희준
    • 한국초등과학교육학회지:초등과학교육
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    • 제34권3호
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    • pp.346-356
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    • 2015
  • The purpose of this study was to explore the characteristics of elementary science gifted students' modification of scientific explanations based on evidences. For this study, sixteen $6^{th}$ elementary students were participated. The subjects of this study were enrolled in the program for the science gifted. Students were asked to generate initial hypotheses before experiment, and to modify and revise their scientific explanations based on the experiments about water rising in burning candle(s). All the processes of small group discussion during the inquiry were audio-recorded. Students' modification of their scientific explanations were appeared in three types: 1) appropriate connections among evidences, reasoning, and claims, 2) disconnections among evidences, reasoning, and claims and/or use of inappropriate reasoning, 3) scientific explanations without their own understanding. Other problems that students encountered in the processes of modification of their explanations were also discussed.

Quantitative correlation of MA concentration among the hairs in forensic evidence

  • Han, Eun-Young;Yang, Won-Kyung;Lee, Jae-Sin;Park, Yong-Hoon;Kim, Eun-Mi;Lim, Mi-Ae;Chung, Hee-Sun
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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    • pp.169.1-169.1
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    • 2003
  • This study was designed to compare the results and concentraions of methamphetamine (MA) and its metabolite amphetamine (AP) in head hair and hair collected from different parts of the body (axullae, pubis, and leg). Hair of subjects (N=15) suspected for MA abuse was simultaneously collected. (omitted)

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PCR에 의한 X,Y-Specific Alphoid Repeat Sequences의 분석 (Gender Determination of X and Y-Specific Alphoid Repeat Sequences by PCR)

  • 최동호;강필원;이양한;한면수
    • 분석과학
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    • 제12권1호
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    • pp.80-83
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    • 1999
  • 사람에게서 유래된 DNA시료의 X,Y 특이의 alphoid gene을 PCR법으로 분석하면 성별을 확인할 수 가 있다. PCR법으로 alphoid gene을 분석한바 매우 예민도가 높아 genomic DNA 약 60pg까지 성별을 분석할 수 있었다. 그리고 성별이 혼합되어 있는 DNA에서 female DNA의 1/10비 까지는 male DNA를 분석할 수 있었다. 따라서 이 결과는 혼합된 DNA에서 X,Y 특이의 alphoid gene을 분석하는데 기준으로 활용할 수가 있다.

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Digital Forensics: Review of Issues in Scientific Validation of Digital Evidence

  • Arshad, Humaira;Jantan, Aman Bin;Abiodun, Oludare Isaac
    • Journal of Information Processing Systems
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    • 제14권2호
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    • pp.346-376
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    • 2018
  • Digital forensics is a vital part of almost every criminal investigation given the amount of information available and the opportunities offered by electronic data to investigate and evidence a crime. However, in criminal justice proceedings, these electronic pieces of evidence are often considered with the utmost suspicion and uncertainty, although, on occasions are justifiable. Presently, the use of scientifically unproven forensic techniques are highly criticized in legal proceedings. Nevertheless, the exceedingly distinct and dynamic characteristics of electronic data, in addition to the current legislation and privacy laws remain as challenging aspects for systematically attesting evidence in a court of law. This article presents a comprehensive study to examine the issues that are considered essential to discuss and resolve, for the proper acceptance of evidence based on scientific grounds. Moreover, the article explains the state of forensics in emerging sub-fields of digital technology such as, cloud computing, social media, and the Internet of Things (IoT), and reviewing the challenges which may complicate the process of systematic validation of electronic evidence. The study further explores various solutions previously proposed, by researchers and academics, regarding their appropriateness based on their experimental evaluation. Additionally, this article suggests open research areas, highlighting many of the issues and problems associated with the empirical evaluation of these solutions for immediate attention by researchers and practitioners. Notably, academics must react to these challenges with appropriate emphasis on methodical verification. Therefore, for this purpose, the issues in the experiential validation of practices currently available are reviewed in this study. The review also discusses the struggle involved in demonstrating the reliability and validity of these approaches with contemporary evaluation methods. Furthermore, the development of best practices, reliable tools and the formulation of formal testing methods for digital forensic techniques are highlighted which could be extremely useful and of immense value to improve the trustworthiness of electronic evidence in legal proceedings.

전통한의학 연구방법론의 현대화에 대한 소고(小考) - 역사적 근거중심의학에 대한 제언 - (A Proposal for Use in Research Methodology of Traditional Medicine in East Asia - Historical Evidence-Based Medicine -)

  • 엄석기;김세현;최원철
    • 대한한의학원전학회지
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    • 제23권2호
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    • pp.89-105
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    • 2010
  • Research methodology on Traditional Medicine in East Asia refers to logical thinking system, empirical positivism system and methodology of developing these knowledge systems. Logical thinking system of abstract concepts such as analogy or abduction and positivism system of reasonable explanation such as the five elements and their characteristic theory have been used in various ways empirically or in the form of humanities and knowledge system was developed through parallel structure of empirical positivism and exegetical studies. After the 16th century, evidence was required along with the tradition of putting emphasis on rationality, logicality and empirical positivism and characteristics of medical humanities can be found in emphasizing on medical ethics. Data that can be considered as structural review paper or meta analysis from original data of research on Traditional East Asian Medicine should be evaluated as historical evidence which is equivalent to specialist opinion, descriptive disease research, single case report or case series. Historical evidence based medicine is a research method using Historical evidence to selectively support data that are faithful to traditional theory with higher possibility to be used in future traditional east Asian medicine that links between traditional knowledge and scientific research methodology. Moreover, historical evidence based medicine tries to re-evaluate the value of traditional knowledge and ultimately, guides the direction of development of traditional medicine through scientific rationality based on history and culture.

교실에서의 실질적 과학 탐구를 위한 과학적 논증 기회에 대한 이론적 고찰 (Theoretical Study on the Opportunity of Scientific Argumentation for Implementing Authentic Scientific Inquiry)

  • 박영신
    • 한국지구과학회지
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    • 제27권4호
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    • pp.401-415
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    • 2006
  • 초 중고 과학 교육에서는 과학적 소양의 함양을 그 학습 목표로 하고 있으며 이를 위해서 학생들은 과학자들이 어떻게 과학적 지식을 정립해 가는지를 이해하는 과정이 필요하다고 주장하고 있다. 하지만 학교에서의 과학 탐구는 오로지 경험을 중시하는 실험 위주의 과학 탐구를 실행, 어떻게 자신들이 수집한 자료가 세운 이론에 합당한지를 밝히는 논증활동이 없다는 것이 문제점으로 지적되고 있다. 이 고찰 논문은 학교에서의 과학 탐구가 과학자들의 그것과 다르며, 실질적 과학 탐구의 실현을 위해서는 교사들이 탐구 자체의 정의, 목표 및 요소를 정확하게 이해하고, 과학적 논증기회를 부여하기 위한 적절한 교수 전략을 개발해야 함을 보여주고 있다.

건강기능식품의 기능성을 중심으로 한 글루코사민의 관절건강 기능성에 대한 체계적 고찰 (Systematic Review of the Effect of Glucosamine on Joint Health while Focused on the Evaluation of Claims for Health Functional Food)

  • 김주희;김지연;곽진숙;백주은;정세원;권오란
    • 한국식품영양과학회지
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    • 제43권2호
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    • pp.293-299
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    • 2014
  • 글루코사민의 관절건강 기능성을 건강기능식품 재평가 기준에 맞추어 체계적 고찰을 실시하였다. 2012년 5월 기준 DB 검색을 통해 703건의 자료를 수집하여, 선정/제외 기준에 따라 선별한 결과 총 34건의 연구가 평가되었다. 34건 중 28건(4,225명)의 연구에서 통계적으로 유의한 개선 효과가 나타났으며(P<0.05), 일일 섭취량은 1.5~2 g으로 공전에서 제시되어 있는 섭취량 범위에 해당하였다. 글루코사민의 기능성 재평가 이후의 연구 결과는 16건이었고, 이 중 1,158명 대상 14건의 연구에서 유의한 관절건강 개선효과를 보였다(P<0.05). 연구대상자에 따른 분석 결과, 방사선 검사 기준에 따라 관절 연골의 손상 정도가 심한 대상자를 제외한 연구는 11건이었으며, 이 중 2,934명 대상 10건의 연구에서 글루코사민이 관절건강에 유의한 개선 효과를 보였다(P<0.05). 따라서 현시점에서 건강기능식품인 글루코사민의 관절건강 기능성은 인정될 것으로 판단되나 향후 연구 결과 추이를 지속적으로 지켜볼 필요가 있다.

산림바이오매스에너지에 관한 과학적 근거에 따른 통설적 접근 (Forest Biomass Utilization for Energy Based on Scientifically Grounded and Orthodox)

  • 이승록;한규성
    • 신재생에너지
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    • 제20권1호
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    • pp.145-174
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    • 2024
  • Addressing climate change necessitates evidence-based policies grounded in science. The use of forest biomass for energy production is based on a broad scientific consensus at the international level. However, some environmental groups in South Korea are opposing this system of energy production. Through this study, the authors aim to reduce unnecessary confusion and foster an atmosphere conducive to meaningful evidence-based policies. We have classified the issue into eight categories: biological carbon cycle, carbon debt, nature-based solutions, air emissions, cascading principles and sustainability certification, forest environmental impacts, climate change litigation, and the behavior of environmental groups and public perception. Consequently, the following key points were derived: (1) the actions of some environmental groups seem to follow a similar pattern to denialist behavior that denies climate change and climate science; (2) the quality of evidence for campaigns that oppose the use of forest biomass for energy production is low, with a tendency to overgeneralize information, high uncertainty, and difficulty in finding new claims.; (3) most of the public believes that forest biomass energy is necessary, and the governments of major countries are aware of its importance. Significantly, Forest biomass for energy is based on an overwhelming level of scientific consensus recognized internationally.

수문장의 딜레마: 도버트 기준 도입 이후 과학과 법의 관계 변화 (The Gatekeeper's Dilemma: The Changing Relationship between Science and Law after the Introduction of the Daubert Standard)

  • 김성은;박범순
    • 과학기술학연구
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    • 제15권1호
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    • pp.215-244
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    • 2015
  • 1993년 과학적 증거 심리에 대해 새로운 방식을 정립한 도버트 기준은 법정의 판결뿐만 아니라 행정기관의 규제 심의에도 광범위하게 쓰이게 되었고, 국경을 넘어 다른 나라의 법정에도 영향을 주기 시작했다. 이 논문은 도버트 기준의 도입 이후 과학과 법의 관계 사이에 일어난 변화를 알아보고, 이 기준에 대한 옹호론자와 비판론자 사이의 관점의 차이를 분석한 후, 과학기술학에서 법과 과학의 관계에 대해 더 깊게 다룰 수 있는 연구영역을 탐색하는 것을 목적으로 하고 있다. 사회적 정의를 추구하는 법의 정신과 불변의 진리를 찾아가는 과학의 속성 사이에서 합리적 판단을 해야 하는 판사의 고충, 즉 '수문장의 딜레마'룰 문제의 핵심으로 보고, 판사가 도버트 기준의 실용성과 형식적인 공정성에 매몰되지 않아야 한다고 주장한다. 이를 위해 과학기술학은 도버트 기준 확산의 역사적 맥락에 대한 연구와 함께 깊이 있는 판례 연구를 통해 입법과정과 공공정책개발과정에 적극적으로 참여할 것을 제안한다.