Snapshot Survey of the Presence of Perfluoroalkyl Substances in Products, Articles, and the Environment in Ecuador

The Stockholm Convention on Persistent Organic Pollutants(POPs)is a legally binding instrument for 186 Parties(status:April 2023).Accordingly,among other responsibilities,countries are obliged to report the production,import,or export of the POPs listed in Annexes A,B,or C;provide information to registers;maintain inventories;and monitor the presence of POPs in the environment.In the broader context of international chemicals and waste management,producer responsibilities,harmonized reporting,and compliance with national and international regulations,Ecuador has addressed the newly listed group of perfluorinated alkyl substances(PFAS)in its national implementation plan and sent selected products from its national market for PFAS analysis.The products analyzed came from the initially listed fields of specific exemptions and acceptable purposes,including:fire-fighting foams;photographic aids;greasers/degreasers;various kinds of paper/packaging;textiles;and leather,coatings,cleaners,metal plating,and pesticides.Our results showed that the three PFAS presently listed in the Stockholm Convention could be quantified in only a few samples;additional PFAS,not yet listed in the Convention also had low detection frequencies.Although the number of samples was limited,the samples covered a large spectrum of sample matrices,making it possible to conclude that—once these products become waste and are regulated under the Basel Convention—they would not constitute a disposal problem.Nevertheless,verification of the presence of PFAS in products on the market is expected to pose an analytical challenge for both,developed and developing countries.

Highly cited publication performance in the ophthalmology category in the Web of Science database:a bibliometric analysis

AIM:To determine and evaluate the features of highly cited articles(HCAs)in the ophthalmology category in the Science Citation Index Expanded(SCI-EXPANDED)from 1991 to 2020.METHODS:The Web of Science Core Collection documents with at least 100 citations from their publication year until December 31,2020,were evaluated as highly cited.The examined features were the distribution of yearly output and its average number of per publication,HCAs,authors,institutions,journals,and nations.The publication performance of nations and organizations was assessed using six publication indicators.The Y-index was employed to compare the research outputs of various authors.RESULTS:Publications that had cited the most references were highly published in high-impact factor journals.The United States of America came out on top across all six publication indicators,and it was home to eight of the top 10 most productive institutions.The articles written by Breivik et al(2006)and Farrar et al(2001)were highly cited and had a significant impact in 2020.The authors had a higher number of highly cited articles published as corresponding authors than as first authors.CONCLUSION:The findings of the present study highlight the current scope of global research in ophthalmology.The findings can help policy-makers and advisory groups of research centers to develop future policies.In addition,the findings can guide researchers in this field.

Contrastive thematic analysis in research articles

Based on the theory of thematic complexity, a contrastive analysis on 2 sections selected from research articles-method and discussion, was conducted. The differences and similarities between the 2 sections in simple theme, multiple theme, textual theme, interpersonal theme, topical theme and thematic progression were analyzed and concluded. The author believes that the causes of the differences and similarities are the different genre features of the 2 sections and the academic features of the materials selected.

Baishideng’s Reference Citation Analysis database announces the first Journal Article Influence Index of 101 core journals and a list of high-quality academic journals in gastroenterology and hepatology

After three rounds of rigorous evaluation of core journals in gastroenterology andhepatology conducted by the Reference Citation Analysis (RCA) editorial team ofBaishideng Publishing Group (Baishideng), the RCA database of Baishidengofficially released the 2022 Journal Article Influence Index (2022 JAII) of 101 corejournals in gastroenterology and hepatology, for the first time. The list of 101 corejournals can be found at: https://www.referencecitationanalysis.com/Search-Journal. Among them, the highest 2022 JAII is 48.014 and the lowest is 3.900. Thisarticle highlights the top 20 journals, describes the calculation method for the 2022JAII, the evaluation process, and the inclusion principles for journals in the RCA.These steps are the underpinning of the RCA’s empirical journal academicevaluation service by which the digital platform addresses the needs of authors toselect reliable journals for submission, readers to select high-quality literature forreading, and editors to track their own journal citation performance. As such, theRCA core journal list will serve as a useful Find-a-Journal tool. Any interestedparty is welcome to use this journal list and recommend it to their peers.

Baishideng’s Reference Citation Analysis database announces the first Journal Article Influence Index of 104 core journals and a list of high-quality academic journals in orthopedics

After three rounds of rigorous evaluation of core journals in orthopedics conducted by the Reference Citation Analysis(RCA)editorial team of Baishideng Publishing Group(Baishideng),the RCA database of Baishideng officially released the 2022 Journal Article Influence Index(2022 JAII)of 104 core journals and a list of high-quality academic journals in orthopedics,for the first time on August 9,2022.The list of 104 core journals can be found at:https://www.referencecitationanalysis.com/SearchJournal.Among them,the highest 2022 JAII is 55.015 and the lowest is 3.076.This article introduces the 21 high-quality academic journals and describes the calculation method for the 2022 JAII,the evaluation process,and the inclusion principles for journals in the RCA.These steps are the underpinning of the RCA’s empirical journal academic evaluation service by which the digital platform addresses the needs of authors to select reliable journals for submission,readers to select high-quality literature for reading,and editors to track their own journal citation performance.As such,the RCA core journal list will serve as a useful Find-a-Journal tool.Any interested party is welcome to use this journal list and recommend it to their peers.

Baishideng’s Reference Citation Analysis database announces the first Article Influence Index of multidisciplinary scholars

After three rounds of rigorous evaluation of registered scholars conducted by the Reference Citation Analysis(RCA)editorial team of Baishideng Publishing Group(Baishideng),the RCA database of Baishideng officially released the 2022 Article Influence Index(2022 AII)of 632 scholars from 74 countries/territories in 98 research categories,for the first time.The list of 632 scholars can be found at:https://www.referencecitationanalysis.com/searchscholar.Among them,the highest 2022 AII is 348.211,the highest number of total citations is 42830,and the highest number of total articles is 901.The category with the largest number of RCA scholars is Gastroenterology&Hepatology,with a total of 100(15.8%),and the second is Surgery,with a total of 46(7.3%).This article summarizes the RCA scholars and describes the mission of RCA,the openness and transparency of RCA evaluation,the calculation method for the 2022 AII,and the evaluation process of RCA scholars.The RCA scholar list will effectively serve as a useful Find-a-Scholar tool.Any interested scholar is welcome to register and join this RCA scholar list.

An Investigation of the Misuse of English Articles of Chinese English Learners

English articles belong to a category of high frequency words. However, they also have been considered as one of the most difficult part and latest part to be fully acquired by non-native speakers. Because of this reason, a lot of efforts have been made to research into the acquisition of them. In China, researches on the article system were mainly focused on the analysis of functions and description of the usage. This essay intends to explore the distribution and features of English article errors made by Chinese EFL （English as a Foreign Language） learners both horizontally and longitudinally with the hope to find the possible factors which lead to the errors, so as to throw some light on English articles learning and teaching

Move-Step Structure of the Introduction Section of English Medical Science Research Articles Written by Chinese Researchers Published in International Journals

In the past decades,a number of researchers have tried hard to identify the move-step structure of different sections in research articles(RAs)from various disciplines.However,there is a very few amount of previous studies conducted on the move-step structure of the Introduction section of English medical science research articles(MSRAs)written by Chinese researchers published in international journals.In order to fill this gap,the present study aims to identify the moves,steps,and their structure of the Introduction section of English MSRAs written by Chinese researchers at Zunyi Medical University(ZMU)published in international journals.To create the target corpus of the present study,30 Introductions were purposively selected from 25 international medical science journals,which were published from 2007 to 2015.It is worth noting that all the authors are restricted to Chinese researchers only and at least one author must come from ZMU.The framework of Kanoksilapatham’s(2005)was adopted for the move-step analysis in the present study.The results demonstrated that these Introduction sections were generally written with three moves following the selected framework.In addition,there were two new steps that occurred in the Introduction section of these English MSRAs.In conclusion,the findings of the present study might provide a guideline for the research who plan to write English MSRAs for international articles more effectively.Moreover,the findings may provide valuable information for academic writing textbook designers as well.

美国地理学百年发展脉络分析——基于《Annals of the Association of American Geographers》学术论文的统计分析

《美国地理学家联合会会刊》代表着美国地理学的最高水平,其载文及其变化从一个侧面反映出美国地理学的发展历程。通过对其学术论文进行统计分析,考察美国地理学的总体地位和不同领域相对地位的变化,梳理美国地理学百年发展脉络,得出以下结论:20世纪以来美国地理学经历了战前初步发展、战后快速发展和20世纪80年代以来的持续发展三大阶段,美国地理学的第二个春天正在到来;逐步形成了环境科学,研究方法、模式和地理信息科学,自然与社会,人口、地方、区域,综合地理五大领域框架;长期关注与人类发展密切相关的问题,人文地理学始终占据主导地位;非常注重实践,强调理论来源于实践、应用于实践;研究领域相对稳定,但不同方向的相对地位却此消彼长。依据载文数量的相对比例,可以概括出美国地理学发展脉络:自然(1911—1915)→经济(1916—1920)→自然(1921—1925)→地图学(1926—1930)→地方(1931—1935)→自然(1936—1940)→地理教育(1941—1945)→生态环境(1946—1950)→地方(1951—1955)→经济(1956—1975)→自然(1977—1990)→经济(1990—2005)。上述研究领域、方向及其变化,也基本上代表了世界地理学的整体发展规律。

An Analysis of the Misuse of Definite Article THE of English Majors

The acquisition and usage of definite article THE has always gained attention from scholars from domestic and overseas due to its difficulty of learning and mastering. As a result, the relative study of definite article THE acquisition has been one of the the most significant tasks of second language acquisition all the time. For English majors, the acquisition of definite articles THE runs through the whole process of language learning and application. Learner＇ s version of foreign language, known as interlanguage, is a kind of language that exists between the mother tongue （Chinese） and the target language （English）. Interlanguage is a systematic unit which changes and develops constantly. Since definite article THE has rather complex and frequently altered usage, it is inevitable that there are a throng of misuse and problems for English majors when they are using definite article THE. This paper intends to do a survey focusing on English majors＇ application situation of definite article THE. Through analyzing the common misuse and mistakes appeared when English majors are using definite article THE, this paper aims to summerize the FAQ （frequently asked questions） and causes of those misuses. At the same time, the 100 experimental subjects of this survey are equally and randomly chosen from freshmen and third year students of foreign languages college, OUC （Ocean University of China）. By comparing the experimental results of two different grade English major students, this paper aims to demonstrate the influence of different grades on the mastering of definite articles THE of English majors.

An Empirical Study on Academic Writing of Applied Linguistics Articles

It has been suggested that Swales’create-a-research-space(CARS)model has had a tremendous influence on genre analysis in EAP and ESP and on the teaching of academic writing aiming at both L1 students or NNS students.In this essay,five RAs from TESOL Quarterly published from 1999 to 2001 will be analysed.The papers were selected because they were close in time and they had clearly defined and labelled introduction and conclusion sections.Based on CARS model,the paper will focus on structure of introductions and examine the link between introductions and conclusions by analysing the structure of conclusions.

Fault Detection and Diagnosis of a Gearbox in Marine Propulsion Systems Using Bispectrum Analysis and Artificial Neural Networks

A marine propulsion system is a very complicated system composed of many mechanical components.As a result,the vibration signal of a gearbox in the system is strongly coupled with the vibration signatures of other components including a diesel engine and main shaft.It is therefore imperative to assess the coupling effect on diagnostic reliability in the process of gear fault diagnosis.For this reason,a fault detection and diagnosis method based on bispectrum analysis and artificial neural networks (ANNs) was proposed for the gearbox with consideration given to the impact of the other components in marine propulsion systems.To monitor the gear conditions,the bispectrum analysis was first employed to detect gear faults.The amplitude-frequency plots containing gear characteristic signals were then attained based on the bispectrum technique,which could be regarded as an index actualizing forepart gear faults diagnosis.Both the back propagation neural network (BPNN) and the radial-basis function neural network (RBFNN) were applied to identify the states of the gearbox.The numeric and experimental test results show the bispectral patterns of varying gear fault severities are different so that distinct fault features of the vibrant signal of a marine gearbox can be extracted effectively using the bispectrum,and the ANN classification method has achieved high detection accuracy.Hence,the proposed diagnostic techniques have the capability of diagnosing marine gear faults in the earlier phases,and thus have application importance.

LAME:Layout-Aware Metadata Extraction Approach for Research Articles

The volume of academic literature,such as academic conference papers and journals,has increased rapidly worldwide,and research on metadata extraction is ongoing.However,high-performing metadata extraction is still challenging due to diverse layout formats according to journal publishers.To accommodate the diversity of the layouts of academic journals,we propose a novel LAyout-aware Metadata Extraction(LAME)framework equipped with the three characteristics(e.g.,design of automatic layout analysis,construction of a large meta-data training set,and implementation of metadata extractor).In the framework,we designed an automatic layout analysis using PDF Miner.Based on the layout analysis,a large volume of metadata-separated training data,including the title,abstract,author name,author affiliated organization,and keywords,were automatically extracted.Moreover,we constructed a pre-trainedmodel,Layout-Meta BERT,to extract the metadata from academic journals with varying layout formats.The experimental results with our metadata extractor exhibited robust performance(Macro-F1,93.27%)in metadata extraction for unseen journals with different layout formats.

知识图谱领域研究工具与研究方法的关联分析

[目的/意义]本研究对知识图谱领域中研究工具与研究方法的关联性进行分析,以识别最有效的研究工具和研究方法组合,为该领域的研究者在研究工具和研究方法的选择方面提供参考。[方法/过程]首先以中国知网学术期刊全文数据库作为数据源,收集全文中包含了16种常用研究工具和9种常用研究方法的期刊论文;然后利用社会网络分析工具Pa jek软件,对研究工具和研究方法之间的关系等绘制了共现网络图,并对它们的关系进行了较为深入的分析。[结果/结论]知识图谱研究工具和方法的使用呈现上升趋势。其中,Citespace和VOSviewer等工具使用较多,而In-PIRE等工具使用较少。Python和Neo4j这类工具的使用量在不断增加。聚类分析、社会网络分析等研究方法使用较多,而文献耦合、期刊共被引等使用较少。研究工具与研究方法的组合变得更加多样化,这为研究者提供了丰富的手段以应对复杂多变的研究挑战,促进新知识的发现和解决方案的有效性。

A bibliometric investigation and qualitative analysis of articles in the Journal of Library Science in China from 1998 to 2017

Assessing quantity or quality of academic articles are two completely different evaluation orientations.Obviously,quantity never represents quality and vice versa.In general,the quantitative research aims at the groups,mainly through the bibliometric indicators,to realize the statistical evaluation of the quantity,while the quality analysis aims at individuals.

基于SNA的iConference论文作者合作情况研究

搜集整理2008-2012年iConference会议论文,利用UCINET及Pajek构建作者合作网,并根据合作网络群体的连接特点,将作者合作网络分为单核模式、完备模式、桥梁模式及多团体合作模式。再对所有合作子网的作者机构进行统计分析,从而证明iSchool跨机构、跨领域及与产业应用结合的成果比较明显,并且有进一步发展可能。

Methodological Analysis of Clinical Articles on Therapy Evaluation Published in Chinese Journal of Integra

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元分析方法综述:从基础到高阶

作为一项重要的研究工具,元分析已广泛应用于心理学、管理学、教育学和医学等科学领域。随着统计技术的发展,传统元分析已逐渐衍生出大量高阶研究方法。为使研究者和从业者及时捕捉其发展现状,本文全面探讨了元分析的原理、应用及最新进展。首先,详细阐述了传统元分析的基本原理、历史发展及操作步骤。其次,归纳了传统元分析衍生出的高阶研究方法,包括:跨层次元分析、元分析结构方程模型及其他应用(如可复制性研究与大数据分析)等。最后,讨论了元分析在科学研究中的意义及局限性。本文为研究者提供了一个全面的元分析方法概述,帮助研究者识别其发展趋势和潜在问题,并有助于进一步改进该方法以适应不断变化的研究需求。

《中华护理教育》创刊20年刊文分析

目的分析《中华护理教育》自2004年创刊20年的刊文情况,为护理教育者和护理研究者提供参考。方法以2004年—2023年发表在《中华护理教育》的文献为数据来源,对刊文数量、高被引情况、基金项目、作者、机构、研究热点等进行分析。结果剔除会议、通知、编读往来等内容后,2004年—2023年《中华护理教育》总发文量为3809篇,其中教育类文献2983篇。刊文量先逐年增长,后略微下降至逐渐稳定;有8篇文献被引频次>100;有1688篇文献获得共2176个基金项目的资助,其中361篇文献受到≥2项的基金资助;发文量≥6篇的核心作者共有228名,仅在102名作者之间形成了12个合作网络,以同一单位间的合作为主。教育类文献的研究主题集中在课程建设与教学改革、健康教育、临床实践教学、在职培训/继续教育、高职高专教育。结论《中华护理教育》刊文类型主要以教育类文献为主,一半以上文献受到各类基金项目的资助;机构/作者间在小范围内形成了学术合作网络,刊文重点多为近些年新兴的护理教育研究热点。未来刊发文献在学术影响力和研究广度方面还有进一步提升的空间,高水平研究成果需要更多的跨机构、跨学科的合作。

国内外智能家居研究进展与趋势——基于2013—2023年核心期刊文献的CiteSpace可视化分析

运用CiteSpace软件,对2013—2023年中国知网CNKI和Web of Science核心期刊数据库收录的智能家居领域研究型论文进行可视化分析,为我国智能家居研究提供参考。研究发现:在各发文国家中,美国在智能家居领域的贡献最大,我国的研究虽然具有规模,但目前影响力有限。在作者和机构合作方面,国外机构之间的合作程度较高,我国机构之间合作程度有待加强。在研究热点和趋势方面,国内外研究基本围绕着物联网技术、云计算技术、远程控制等,早期国内研究更强调远程控制和数字家庭,而国外研究注重智能电网、传感器和意见反馈;后期国内研究侧重传感器技术和人工智能交互,国外研究则侧重于能源利用和隐私保护。