Introduction and Motivation Legal science and philosophy are two of the most important dis- ciplines in the field of human rights research, both of them assuming different roles and functions in human rights analysis...Introduction and Motivation Legal science and philosophy are two of the most important dis- ciplines in the field of human rights research, both of them assuming different roles and functions in human rights analysis. Scholars can discuss or debate from a philosophical per- spective such as where the ideology of human rights comes from, what the ontology of human rights is and whether people could legitimate human rights claims on the basis of natural morality.展开更多
沉香是我国传统名贵南药,广泛应用于医药、香水、香料、宗教等方面,现已形成了工业、文化产业和农业三大类产业,市场价值极高。本研究在中国知网、维普网和万方数据库中以“沉香结香”为主题词检索,导出1978—2022年发表的文章,利用Cite...沉香是我国传统名贵南药,广泛应用于医药、香水、香料、宗教等方面,现已形成了工业、文化产业和农业三大类产业,市场价值极高。本研究在中国知网、维普网和万方数据库中以“沉香结香”为主题词检索,导出1978—2022年发表的文章,利用CiteSpace软件进行可视化分析;在Web of Science以“agarwood production method”为检索词,可视化分析1978—2022年发表的外文文献。结果表明,国内沉香结香的研究一共分为3个阶段,1978—2007年为萌芽阶段,仅有零星文章产出;2008—2017年为快速发展阶段,大量文章产出并在2017年达到顶峰(41篇);2018—2022年为稳定阶段,持续产出文章并维持在年均20篇以上;有关沉香结香机理的研究发文量前10的期刊中,90%等级均在科技核心以上,排在前10的研究结构均处于沉香产业发达地区。国外沉香结香的研究起源于2008年,整体发文量趋势逐年增加;被引量前10的期刊均为SCI;研究量前10的国家均为GDP前列的国家。有关沉香自然结香和人工结香差异分析的研究成为当前研究热点,未来如何利用2种不同沉香结香方式的成分差异发展沉香资源,将会是新的研究趋势。本研究结果将为科研人员研究提供进一步参考方向,也为生产种植者提供沉香结香参考。展开更多
Aiming at the main problems existing in the teaching process of new agricultural science,systematic solutions are put forward:(1)creating an agriculture related professional group serving the coordinated development o...Aiming at the main problems existing in the teaching process of new agricultural science,systematic solutions are put forward:(1)creating an agriculture related professional group serving the coordinated development of large-scale operation subjects and small farmers,and fully connecting the coordinated development needs of large-scale operation subjects and small farmers;(2)carrying out all-round agricultural related professional teaching reform,so as to cultivate high-quality talents for the organic connection between small farmers and modern agricultural development;(3)based on agriculture related professional resources,taking multiple measures to improve the social service development ability of secondary vocational schools.展开更多
《中国地理科学》(英文版)是我国创办最早的综合性英文地理期刊,分析其发文被引用情况可以了解该刊十几年来变化情况,又可以为刊物今后的发展方向提供依据。本文利用Web of Science的引文检索功能,统计了该刊2002-2012年的被引用情况,...《中国地理科学》(英文版)是我国创办最早的综合性英文地理期刊,分析其发文被引用情况可以了解该刊十几年来变化情况,又可以为刊物今后的发展方向提供依据。本文利用Web of Science的引文检索功能,统计了该刊2002-2012年的被引用情况,从载文量、篇均被引频次、单篇被引频次、被引频次年代分布、被引论文专业分布和引文类型分布等几个方面,基于地理学学科特点和文献计量学方法进行综合分析,总结该刊目前发展存在的问题及改进措施,以期为刊物发展提供参考,更好地促进地理学科的发展。展开更多
目的对循环肿瘤细胞(CTC)研究文献进行计量分析,为准确掌握国际上CTC领域研究态势和选择前沿技术课题提供参考。方法基于Web of Science数据库,借助CiteSpace等分析工具,采用可视化分析、共现分析、引文分析、突发检测等分析方法,对CTC...目的对循环肿瘤细胞(CTC)研究文献进行计量分析,为准确掌握国际上CTC领域研究态势和选择前沿技术课题提供参考。方法基于Web of Science数据库,借助CiteSpace等分析工具,采用可视化分析、共现分析、引文分析、突发检测等分析方法,对CTC领域文献的分布特征、核心引文、热点领域、研究前沿等进行分析。结果在Web of Science共检索出861条循环肿瘤细胞研究文献题录和28 132条引文。分析显示,近年来CTC领域的研究发展迅速,并已成为肿瘤领域的研究热点之一;美国在CTC研究领域占有绝对优势;中国虽然排名第4,但与美国、德国和日本还存在较大差距;挖掘出了CTC领域的20篇核心引文,掌握了目前CTC的主要研究热点和研究前沿。结论我国亟需进一步加强对CTC的研究,尤其应关注CTC由基础研究向临床研究转化的关键问题,为实现肿瘤的个体化治疗奠定基础。展开更多
本文从ISI Web of Knowledge入手引出ISI Web of Science数据库,在简述ISI Web of Science这个多学科综合性学术期刊数据库的特点及其优越性的基础上;逐一介绍此数据库的检索系统所提供的快速检索、普通检索、被引文献检索、化学结构检...本文从ISI Web of Knowledge入手引出ISI Web of Science数据库,在简述ISI Web of Science这个多学科综合性学术期刊数据库的特点及其优越性的基础上;逐一介绍此数据库的检索系统所提供的快速检索、普通检索、被引文献检索、化学结构检索、高级检索等检索方法;以及检索方法的具体应用和检索结果的处理。展开更多
科学课程对于学生理解科学的本质、提高公民科学素养具有重要作用。选取Web of Science数据库2000-2016年4127篇有关科学课程教学方法的论文,运用文献计量学和科学知识图谱的方法,对国际科学课程教学法的研究现状进行统计与可视化分析...科学课程对于学生理解科学的本质、提高公民科学素养具有重要作用。选取Web of Science数据库2000-2016年4127篇有关科学课程教学方法的论文,运用文献计量学和科学知识图谱的方法,对国际科学课程教学法的研究现状进行统计与可视化分析。研究表明,新世纪以来,科学课程教学方法研究的热点主要围绕概念教学,研究前沿主要围绕科学论证、有意义评价以及学生合作。美国在科学课程研究方面具有绝对的强势地位,而中国尚未形成足够的国际学术影响力。展开更多
目的作为一本新创的英文期刊,Journal of Translational Neuroscience杂志需要尽快提升其学术水平,扩大其社会影响力,以期能迅速在国际专业学术期刊界占有一席之地,通过约稿获得高质量的学术论文就显得至关重要。方法笔者从找准期刊学...目的作为一本新创的英文期刊,Journal of Translational Neuroscience杂志需要尽快提升其学术水平,扩大其社会影响力,以期能迅速在国际专业学术期刊界占有一席之地,通过约稿获得高质量的学术论文就显得至关重要。方法笔者从找准期刊学术定位、采取灵活多样的约稿方式、分析解决约稿过程中可能存在的问题以及如何做好约稿后续服务工作等几个方面入手,初浅分析探讨了关于期刊约稿的方式方法。结果通过期刊定位准确锁定目标作者群,依托自身优势资源,参与学术会议,通过编委约稿以及提供优质的后续服务等方法获得稳定的高质量作者群,从而获得持续的优秀稿源。结论拥有持续的高质量稿件是促使期刊进入良性循环的重要保障,通过约稿可以解决新创办的期刊无稿可用和缺少优秀稿件的难题,推动期刊走出困境,渐入正轨。展开更多
Phenomenon: Nowadays, with rapidly developing in medical laboratory science(MLS), new concepts, knowledge and technologies are constantly emerging, which requires medical students to continuously learn to grasp the ne...Phenomenon: Nowadays, with rapidly developing in medical laboratory science(MLS), new concepts, knowledge and technologies are constantly emerging, which requires medical students to continuously learn to grasp the new development trend and the latest research progress. To enable the students to learn and make use of scientific knowledge better, the Special English Curriculum for MLS has been set up, which is very important to non-English-speaking students. However, there are many problems in the course of teaching, so the improved teaching quality of the curriculum is in demand. Approach: In this paper these problems are described and the corresponding advices are proposed from the perspectives of staff room, teachers and students, which are supposed to develop the curriculum for education of the medical laboratory scientists. Findings: To improve the teaching quality of the Special English Curriculum for MLS, the textbook should be appropriately selected or compiled, the novel teaching methods can be applied, and the modern multimedia teaching materials can be adopted.The teachers of the curriculum should be proficient in professional knowledge, English as well as the systematic and scientific teaching methods. The students need to have the courage and determination to overcome the difficulties when they learn the curriculum, and the students who have not did well in their lessons should learn to study by themselves. Insights: The Special English Curriculum for MLS is very important to non-English-speaking students and is kind of difficult for them, the staff room, teachers and students should adjust themselves to teach and learn the curriculum better.展开更多
以中国知网CSSCI数据库和Web of Science数据库中发表的创新创业教育文献为研究对象,进行文献计量分析和社会网络分析,梳理发展脉络,对比研究差异。结果显示,我国在该领域研究发文数量少,质量不高,专业期刊级别较低。缺乏顶尖院校、研...以中国知网CSSCI数据库和Web of Science数据库中发表的创新创业教育文献为研究对象,进行文献计量分析和社会网络分析,梳理发展脉络,对比研究差异。结果显示,我国在该领域研究发文数量少,质量不高,专业期刊级别较低。缺乏顶尖院校、研究院和行业龙头企业参与,尚未形成核心作者集群。与国情相关的实证研究少而不精,对社会迫切问题的研究不够深入。近两年,国内的研究热点开始发生变化,如结合了大数据、“互联网+”等。未来创新创业教育领域将更多强调协同创新和交叉融合,这将极大丰富我国创新创业教育的理论基础,并为该领域指明新的方向。展开更多
Open source intelligence is one of the most important public data sources for strategic information analysis. One of the primary and core issues of strategic information research is information perception,so this pape...Open source intelligence is one of the most important public data sources for strategic information analysis. One of the primary and core issues of strategic information research is information perception,so this paper mainly expounds the perception method for strategic information perception in the open source intelligence environment as well as the framework and basic process of information perception. This paper argues that in order to match the information perception result with the information depiction result,it conducts practical exploration for the results of information acquisition,perception,depiction and analysis. This paper introduces and develops a monitoring platform for information perception. The results show that the method proposed in this paper is feasible.展开更多
This article discusses a multiple hierarchy decision analysis in which the Analytic Hierarchy Process and Delphi method were combined with practice of funds management so as to obtain a scientific management system. T...This article discusses a multiple hierarchy decision analysis in which the Analytic Hierarchy Process and Delphi method were combined with practice of funds management so as to obtain a scientific management system. The design procedures and a practical example have been given to verify the feasibility. The work was supported by China National Natural Science Foundation (NNSF), and the introduced procedures have been used in some departments of the NNSF.展开更多
This study focused on the performance of where elements analysing techniques were used to detect the elements in granite stones. These techniques are NAA (neutron activation analysis) and XRF (X-ray fluorescence)....This study focused on the performance of where elements analysing techniques were used to detect the elements in granite stones. These techniques are NAA (neutron activation analysis) and XRF (X-ray fluorescence). They were applied to detect the elements in samples which had been chosen from different areas of Pulua Penang in Malaysia collected by geophysics group which helped to describe and identify the elements found in the granite stone that were used in the study procedures to control the analytical results. The integration of both methods has enabled the researcher to determine 40 elements in the samples. The numbers of elements detected by XRF analysis method are 12 elements (Ar, K, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn); while, the elements detected by NAA method have three folds of elements with XRF analysis method were 35 elements (Na, AI, Si, K, Ca, Sc,Ti, Mn, Fe, Co, Ga, Ce, As, Br, Rb, Zr, Sb, I, Cs, Ba, La, Nd, Sm, Eu,Tb, Dy, Yb, Lu, Hf, Ta, W, Au, Pa and Np). Seven common elements were detected in both techniques: K, Sc, Ti, V, Mn, Fe and Co. Si has a higher concentration in NAA technique which is 331.8 ppm. Sc has a lower concentration in XRF technique which is 0.25 ppm. Nd has a lower concentration in NAA technique which is 3.09 - 10-5 ppm. Finally, it is found that the NAA is better to detect the elements than XRF.展开更多
In an age when political thinkers were writing books full of quotations of ancient and modern authors,Thomas Hobbes of Malmesbury(1588-1679)developed a philosophical system which was based on scientific method rather ...In an age when political thinkers were writing books full of quotations of ancient and modern authors,Thomas Hobbes of Malmesbury(1588-1679)developed a philosophical system which was based on scientific method rather than on the authority of books.He emphasized that the absurdities that philosophers fall into are actually due precisely to a lack of method and to the habit of quoting other thinkers as if the truth was to be found in their words.It is certainly not inappropriate to read what philosophers,historians,and poets wrote,whether for pure amusement or to find intellectual spurs useful for one’s own research and speculation;but the written word should not be confused with the truth.In the investigation aimed at discovering the truth in political matters,the philosopher must use his own intellect,relying on the strength of reasoning.Thus,political philosophy becomes a science:the science of“consequences from the accidents of politic bodies”.With his reflections on scientia civilis,Thomas Hobbes may be considered the inventor of political science.展开更多
Background To detect and identify mosquitoes using their characteristic high-pitched sound,we have developed a smartphone application,known as the‘HumBug sensor’,that records the acoustic signature of this sound,alo...Background To detect and identify mosquitoes using their characteristic high-pitched sound,we have developed a smartphone application,known as the‘HumBug sensor’,that records the acoustic signature of this sound,along with the time and location.This data is then sent remotely to a server where algorithms identify the species according to their distinctive acoustic signature.Whilst this system works well,a key question that remains is what mechanisms will lead to effective uptake and use of this mosquito survey tool?We addressed this question by working with local communities in rural Tanzania and providing three alternative incentives:money only,short message service(SMS)reminders and money,and SMS reminders only.We also had a control group with no incentive.Methods A multi-site,quantitative empirical study was conducted in four villages in Tanzania from April to August 2021.Consenting participants(n=148)were recruited and placed into one of the three intervention arms:monetary incentives only;SMS reminders with monetary incentives;and SMS reminders only.There was also a control group(no intervention).To test effectiveness of the mechanisms,the number of audio uploads to the server of the four trial groups on their specific dates were compared.Qualitative focus group discussions and feedback surveys were also conducted to explore participants’perspectives on their participation in the study and to capture their experiences of using the HumBug sensor.Results Qualitative data analysis revealed that for many participants(37 out of 81),the main motivation expressed was to learn more about the types of mosquitoes present in their houses.Results from the quantitative empirical study indicate that the participants in the‘control’group switched on their HumBug sensors more over the 14-week period(8 out of 14 weeks)when compared to those belonging to the‘SMS reminders and monetary incentives’trial group.These findings are statistically significant(p<0.05 or p>0.95 under a two-sided z-test),revealing that the provision of monetary incentives and sending SMS reminders did not appear to encourage greater number of audio uploads when compared to the control.Conclusions Knowledge on the presence of harmful mosquitoes was the strongest motive for local communities to collect and upload mosquito sound data via the HumBug sensor in rural Tanzania.This finding suggests that most efforts should be made to improve flow of real-time information back to the communities on types and risks associated with mosquitoes present in their houses.展开更多
法医损伤分析在法医学领域具有重要意义,但损伤形成过程的复杂性和个体差异使损伤分析对专业性要求极高。有限元方法(finite element method, FEM)以其广泛的适用性、可控的精确度和高效的计算能力,结合可视化,在法庭科学领域展现出巨...法医损伤分析在法医学领域具有重要意义,但损伤形成过程的复杂性和个体差异使损伤分析对专业性要求极高。有限元方法(finite element method, FEM)以其广泛的适用性、可控的精确度和高效的计算能力,结合可视化,在法庭科学领域展现出巨大的应用潜力。本文通过文献分析,介绍FEM的基本原理,探讨其在交通事故、枪击、工具致伤、高坠损伤分析中的应用情况,通过分析各应用场景与碰撞部位的模拟参数、模拟结果及研究侧重,评估FEM在法医损伤分析上的可行性、局限性,为法医损伤分析提供参考和技术途径。展开更多
文摘Introduction and Motivation Legal science and philosophy are two of the most important dis- ciplines in the field of human rights research, both of them assuming different roles and functions in human rights analysis. Scholars can discuss or debate from a philosophical per- spective such as where the ideology of human rights comes from, what the ontology of human rights is and whether people could legitimate human rights claims on the basis of natural morality.
文摘沉香是我国传统名贵南药,广泛应用于医药、香水、香料、宗教等方面,现已形成了工业、文化产业和农业三大类产业,市场价值极高。本研究在中国知网、维普网和万方数据库中以“沉香结香”为主题词检索,导出1978—2022年发表的文章,利用CiteSpace软件进行可视化分析;在Web of Science以“agarwood production method”为检索词,可视化分析1978—2022年发表的外文文献。结果表明,国内沉香结香的研究一共分为3个阶段,1978—2007年为萌芽阶段,仅有零星文章产出;2008—2017年为快速发展阶段,大量文章产出并在2017年达到顶峰(41篇);2018—2022年为稳定阶段,持续产出文章并维持在年均20篇以上;有关沉香结香机理的研究发文量前10的期刊中,90%等级均在科技核心以上,排在前10的研究结构均处于沉香产业发达地区。国外沉香结香的研究起源于2008年,整体发文量趋势逐年增加;被引量前10的期刊均为SCI;研究量前10的国家均为GDP前列的国家。有关沉香自然结香和人工结香差异分析的研究成为当前研究热点,未来如何利用2种不同沉香结香方式的成分差异发展沉香资源,将会是新的研究趋势。本研究结果将为科研人员研究提供进一步参考方向,也为生产种植者提供沉香结香参考。
文摘Aiming at the main problems existing in the teaching process of new agricultural science,systematic solutions are put forward:(1)creating an agriculture related professional group serving the coordinated development of large-scale operation subjects and small farmers,and fully connecting the coordinated development needs of large-scale operation subjects and small farmers;(2)carrying out all-round agricultural related professional teaching reform,so as to cultivate high-quality talents for the organic connection between small farmers and modern agricultural development;(3)based on agriculture related professional resources,taking multiple measures to improve the social service development ability of secondary vocational schools.
文摘《中国地理科学》(英文版)是我国创办最早的综合性英文地理期刊,分析其发文被引用情况可以了解该刊十几年来变化情况,又可以为刊物今后的发展方向提供依据。本文利用Web of Science的引文检索功能,统计了该刊2002-2012年的被引用情况,从载文量、篇均被引频次、单篇被引频次、被引频次年代分布、被引论文专业分布和引文类型分布等几个方面,基于地理学学科特点和文献计量学方法进行综合分析,总结该刊目前发展存在的问题及改进措施,以期为刊物发展提供参考,更好地促进地理学科的发展。
文摘目的对循环肿瘤细胞(CTC)研究文献进行计量分析,为准确掌握国际上CTC领域研究态势和选择前沿技术课题提供参考。方法基于Web of Science数据库,借助CiteSpace等分析工具,采用可视化分析、共现分析、引文分析、突发检测等分析方法,对CTC领域文献的分布特征、核心引文、热点领域、研究前沿等进行分析。结果在Web of Science共检索出861条循环肿瘤细胞研究文献题录和28 132条引文。分析显示,近年来CTC领域的研究发展迅速,并已成为肿瘤领域的研究热点之一;美国在CTC研究领域占有绝对优势;中国虽然排名第4,但与美国、德国和日本还存在较大差距;挖掘出了CTC领域的20篇核心引文,掌握了目前CTC的主要研究热点和研究前沿。结论我国亟需进一步加强对CTC的研究,尤其应关注CTC由基础研究向临床研究转化的关键问题,为实现肿瘤的个体化治疗奠定基础。
文摘本文从ISI Web of Knowledge入手引出ISI Web of Science数据库,在简述ISI Web of Science这个多学科综合性学术期刊数据库的特点及其优越性的基础上;逐一介绍此数据库的检索系统所提供的快速检索、普通检索、被引文献检索、化学结构检索、高级检索等检索方法;以及检索方法的具体应用和检索结果的处理。
文摘科学课程对于学生理解科学的本质、提高公民科学素养具有重要作用。选取Web of Science数据库2000-2016年4127篇有关科学课程教学方法的论文,运用文献计量学和科学知识图谱的方法,对国际科学课程教学法的研究现状进行统计与可视化分析。研究表明,新世纪以来,科学课程教学方法研究的热点主要围绕概念教学,研究前沿主要围绕科学论证、有意义评价以及学生合作。美国在科学课程研究方面具有绝对的强势地位,而中国尚未形成足够的国际学术影响力。
文摘目的作为一本新创的英文期刊,Journal of Translational Neuroscience杂志需要尽快提升其学术水平,扩大其社会影响力,以期能迅速在国际专业学术期刊界占有一席之地,通过约稿获得高质量的学术论文就显得至关重要。方法笔者从找准期刊学术定位、采取灵活多样的约稿方式、分析解决约稿过程中可能存在的问题以及如何做好约稿后续服务工作等几个方面入手,初浅分析探讨了关于期刊约稿的方式方法。结果通过期刊定位准确锁定目标作者群,依托自身优势资源,参与学术会议,通过编委约稿以及提供优质的后续服务等方法获得稳定的高质量作者群,从而获得持续的优秀稿源。结论拥有持续的高质量稿件是促使期刊进入良性循环的重要保障,通过约稿可以解决新创办的期刊无稿可用和缺少优秀稿件的难题,推动期刊走出困境,渐入正轨。
文摘Phenomenon: Nowadays, with rapidly developing in medical laboratory science(MLS), new concepts, knowledge and technologies are constantly emerging, which requires medical students to continuously learn to grasp the new development trend and the latest research progress. To enable the students to learn and make use of scientific knowledge better, the Special English Curriculum for MLS has been set up, which is very important to non-English-speaking students. However, there are many problems in the course of teaching, so the improved teaching quality of the curriculum is in demand. Approach: In this paper these problems are described and the corresponding advices are proposed from the perspectives of staff room, teachers and students, which are supposed to develop the curriculum for education of the medical laboratory scientists. Findings: To improve the teaching quality of the Special English Curriculum for MLS, the textbook should be appropriately selected or compiled, the novel teaching methods can be applied, and the modern multimedia teaching materials can be adopted.The teachers of the curriculum should be proficient in professional knowledge, English as well as the systematic and scientific teaching methods. The students need to have the courage and determination to overcome the difficulties when they learn the curriculum, and the students who have not did well in their lessons should learn to study by themselves. Insights: The Special English Curriculum for MLS is very important to non-English-speaking students and is kind of difficult for them, the staff room, teachers and students should adjust themselves to teach and learn the curriculum better.
文摘以中国知网CSSCI数据库和Web of Science数据库中发表的创新创业教育文献为研究对象,进行文献计量分析和社会网络分析,梳理发展脉络,对比研究差异。结果显示,我国在该领域研究发文数量少,质量不高,专业期刊级别较低。缺乏顶尖院校、研究院和行业龙头企业参与,尚未形成核心作者集群。与国情相关的实证研究少而不精,对社会迫切问题的研究不够深入。近两年,国内的研究热点开始发生变化,如结合了大数据、“互联网+”等。未来创新创业教育领域将更多强调协同创新和交叉融合,这将极大丰富我国创新创业教育的理论基础,并为该领域指明新的方向。
基金Supported by the National Social Science Fund Project(No.18BTQ054)
文摘Open source intelligence is one of the most important public data sources for strategic information analysis. One of the primary and core issues of strategic information research is information perception,so this paper mainly expounds the perception method for strategic information perception in the open source intelligence environment as well as the framework and basic process of information perception. This paper argues that in order to match the information perception result with the information depiction result,it conducts practical exploration for the results of information acquisition,perception,depiction and analysis. This paper introduces and develops a monitoring platform for information perception. The results show that the method proposed in this paper is feasible.
文摘This article discusses a multiple hierarchy decision analysis in which the Analytic Hierarchy Process and Delphi method were combined with practice of funds management so as to obtain a scientific management system. The design procedures and a practical example have been given to verify the feasibility. The work was supported by China National Natural Science Foundation (NNSF), and the introduced procedures have been used in some departments of the NNSF.
文摘This study focused on the performance of where elements analysing techniques were used to detect the elements in granite stones. These techniques are NAA (neutron activation analysis) and XRF (X-ray fluorescence). They were applied to detect the elements in samples which had been chosen from different areas of Pulua Penang in Malaysia collected by geophysics group which helped to describe and identify the elements found in the granite stone that were used in the study procedures to control the analytical results. The integration of both methods has enabled the researcher to determine 40 elements in the samples. The numbers of elements detected by XRF analysis method are 12 elements (Ar, K, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn); while, the elements detected by NAA method have three folds of elements with XRF analysis method were 35 elements (Na, AI, Si, K, Ca, Sc,Ti, Mn, Fe, Co, Ga, Ce, As, Br, Rb, Zr, Sb, I, Cs, Ba, La, Nd, Sm, Eu,Tb, Dy, Yb, Lu, Hf, Ta, W, Au, Pa and Np). Seven common elements were detected in both techniques: K, Sc, Ti, V, Mn, Fe and Co. Si has a higher concentration in NAA technique which is 331.8 ppm. Sc has a lower concentration in XRF technique which is 0.25 ppm. Nd has a lower concentration in NAA technique which is 3.09 - 10-5 ppm. Finally, it is found that the NAA is better to detect the elements than XRF.
文摘In an age when political thinkers were writing books full of quotations of ancient and modern authors,Thomas Hobbes of Malmesbury(1588-1679)developed a philosophical system which was based on scientific method rather than on the authority of books.He emphasized that the absurdities that philosophers fall into are actually due precisely to a lack of method and to the habit of quoting other thinkers as if the truth was to be found in their words.It is certainly not inappropriate to read what philosophers,historians,and poets wrote,whether for pure amusement or to find intellectual spurs useful for one’s own research and speculation;but the written word should not be confused with the truth.In the investigation aimed at discovering the truth in political matters,the philosopher must use his own intellect,relying on the strength of reasoning.Thus,political philosophy becomes a science:the science of“consequences from the accidents of politic bodies”.With his reflections on scientia civilis,Thomas Hobbes may be considered the inventor of political science.
基金commissioned by Bill and Melinda Gates Foundation,Grant/Award Number:OPP1209888.
文摘Background To detect and identify mosquitoes using their characteristic high-pitched sound,we have developed a smartphone application,known as the‘HumBug sensor’,that records the acoustic signature of this sound,along with the time and location.This data is then sent remotely to a server where algorithms identify the species according to their distinctive acoustic signature.Whilst this system works well,a key question that remains is what mechanisms will lead to effective uptake and use of this mosquito survey tool?We addressed this question by working with local communities in rural Tanzania and providing three alternative incentives:money only,short message service(SMS)reminders and money,and SMS reminders only.We also had a control group with no incentive.Methods A multi-site,quantitative empirical study was conducted in four villages in Tanzania from April to August 2021.Consenting participants(n=148)were recruited and placed into one of the three intervention arms:monetary incentives only;SMS reminders with monetary incentives;and SMS reminders only.There was also a control group(no intervention).To test effectiveness of the mechanisms,the number of audio uploads to the server of the four trial groups on their specific dates were compared.Qualitative focus group discussions and feedback surveys were also conducted to explore participants’perspectives on their participation in the study and to capture their experiences of using the HumBug sensor.Results Qualitative data analysis revealed that for many participants(37 out of 81),the main motivation expressed was to learn more about the types of mosquitoes present in their houses.Results from the quantitative empirical study indicate that the participants in the‘control’group switched on their HumBug sensors more over the 14-week period(8 out of 14 weeks)when compared to those belonging to the‘SMS reminders and monetary incentives’trial group.These findings are statistically significant(p<0.05 or p>0.95 under a two-sided z-test),revealing that the provision of monetary incentives and sending SMS reminders did not appear to encourage greater number of audio uploads when compared to the control.Conclusions Knowledge on the presence of harmful mosquitoes was the strongest motive for local communities to collect and upload mosquito sound data via the HumBug sensor in rural Tanzania.This finding suggests that most efforts should be made to improve flow of real-time information back to the communities on types and risks associated with mosquitoes present in their houses.
文摘法医损伤分析在法医学领域具有重要意义,但损伤形成过程的复杂性和个体差异使损伤分析对专业性要求极高。有限元方法(finite element method, FEM)以其广泛的适用性、可控的精确度和高效的计算能力,结合可视化,在法庭科学领域展现出巨大的应用潜力。本文通过文献分析,介绍FEM的基本原理,探讨其在交通事故、枪击、工具致伤、高坠损伤分析中的应用情况,通过分析各应用场景与碰撞部位的模拟参数、模拟结果及研究侧重,评估FEM在法医损伤分析上的可行性、局限性,为法医损伤分析提供参考和技术途径。