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A comunicação científica em saúde: uma abordagem semiótica; Scientific communication in health: a semiotic approach

Alvarez, Maria do Carmo Avamilano
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 06/03/2015 PT
Relevância na Pesquisa
25.34%
No cenário da cultura acadêmica e científica em transformação, as bibliotecas indagam os pesquisadores em HIV/aids sobre dificuldades e facilidades na procura de informações. Articulando as disciplinas ciência da informação, saúde pública e semiótica da cultura, este estudo busca analisar o entendimento dos pesquisadores sobre as estratégias de busca de informação técnica e científica nos sistemas bibliográficos. Além disso, identifica os sistemas de signos centrais na semiosfera da cultura e descreve as interações dos pesquisadores com sistemas de informação e bibliotecas, refletindo sobre a comunicação e seus desafios na contemporaneidade. Com base no método semiótico estrutural da Escola de Tártu-Moscou e nos trabalhos de seu maior expoente Iuri Lótman, foram realizadas 25 entrevistas com dois grupos de pesquisa em HIV/aids no Brasil. A diversidade de estratégias do pesquisador sobre a ação de buscar informação científica na contemporaneidade sustenta a dinâmica e a complexidade dos sistemas de signos. As divergências e convergências, traduzidas nas narrativas, explicitam as diferentes linguagens presentes na semiosfera e as tradições de pesquisa. Essas linguagens se transformam, modelizando-se pela variedade de formação acadêmica...

Radiotherapy, cancer and some anatomical structures related with the pelvic floor: an evaluation of the scientific literature

Santos-Filho,Sebastião David; Presta,Giuseppe Antonio; Paoli,Severo de; Missailids,Sotiris; Fonseca,Adenilson de Souza da; Bernardo-Filho,Mario
Fonte: Instituto de Tecnologia do Paraná - Tecpar Publicador: Instituto de Tecnologia do Paraná - Tecpar
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2008 EN
Relevância na Pesquisa
25.33%
Radiotherapy is a cancer treatment that uses high-energy X-rays or other types of ionizing radiation to try to kill the cancer cells in various organs/tissues. PubMed is a database used as a tool in various publications. The aim of this work was to evaluate, in the PubMed, the number of publications (NP) in radiotherapy and cancer in various organs related to the pelvic floor as well as brachytherapy. The searches were performed (August 2008) in the PubMed (http://www.pubmed.com) using the words: (i) radiotherapy (RT) or cancer (CA), (ii) RT and CA, (iii) RT and CA and prostate, RT and CA and testis, RT and CA and breast, RT and CA and kidneys, RT and CA and vulva, RT and CA and vagina, RT and CA and penis, RT and CA and uterus, RT and CA and ovary, RT and CA and bladder, and RT and CA and urethra. A search using brachytherapy was also performed. The NP in each subject was determined and was 2178635 to CA and about 9% of them are related with RT. The NP in RT and CA and breast or prostate is bigger than for the other organs, whereas brachytherapy is mainly cited in the studies about CA of prostate, bladder and breast. In conclusion, our findings demonstrate the importance of radiation therapy studies in the cancer of several organs. This information is crucial in understanding the field and demonstrates areas of significant progress or existing gaps of research in radiotherapy treatment of various cancers of the pelvis. Furthermore...

Prostate cancer, treatment modalities and complications: an evaluation of the scientific literature

Santos-Filho,Sebastião David; Missailids,Sotiris; Fonseca,Adenilson de Souza da; Bernardo-Filho,Mario
Fonte: Instituto de Tecnologia do Paraná - Tecpar Publicador: Instituto de Tecnologia do Paraná - Tecpar
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2008 EN
Relevância na Pesquisa
25.33%
Prostate (PR) cancer (CA) is one of the most common malignant neoplasms in men all over the world. In general, if prostate cancer (PC) is detected early, treatment usually involves either surgical removal of the prostate or radiotherapy (RT). Hormone Therapy (HT) or chemotherapy (CH) is the preferred treatment for more advanced cases of PC or if CA spreads beyond the PT. A number of complications, such as urinary incontinence (IU) or erectile dysfunction (ED), can be associated with some modalities of treatment of the PC. The aim of this work is to evaluate, in PubMed, the number of publications related with prostate cancer and the main modalities of treatment, as well as some clinical complications. The searches were performed in PubMed (http://www.ncbi.nlm.nih.gov/entrez/query.fcgi) in the period 1950 to 2008 using the words: (i) CA, (ii) CA and PR or penis or testis, (iii) CA and PR and RT, CA and PR and surgery (SU), CA and PR and CH and, CA and PR and HT and (iv) CA and PR and RT and IU or ED, CA and PR and SU and IU or ED, CA and PR and CH and IU or ED and, CA and PR and HT and CH and IU or ED, and (V) PC and the same modalities of treatment. The data was obtained on July 20th, 2008. PC, as expected has been cited extensively and surgery has been identified as the most widely referenced modality of treatment. Furthermore...

A Review of Scientific Papers About Head and Neck Cancers

Paoli,Severo de; Fonseca,Adenilson de Souza da; Paoli,Flávia de; Geller,Mauro; Presta,Giuseppe Antonio; Santos-Filho,Sebastião David; Bernardo-Filho,Mário
Fonte: Instituto de Tecnologia do Paraná - Tecpar Publicador: Instituto de Tecnologia do Paraná - Tecpar
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2008 EN
Relevância na Pesquisa
25.31%
Head and neck cancer is one of the 10 most frequent cancers worldwide, with an estimated 500000 new cases diagnosed annually. Treatment of head and neck cancers require a multidisciplinary approach due their complexity and the functional and esthetic alterations that cancer can cause. The interest of the scientific community in a specific subject can be evaluated by analyzing of the number and the quality of published papers on the topic. The information obtained from PubMed (www.ncbi.nlm.nih.gov/sites/entrez) has been used as a tool in various publications to aid the evaluation of the scientific interest in specific research areas The aim of this work is to evaluate, using PubMed, the scientific interest in studies of head and neck cancer treatments such as radiotherapy, chemotherapy and surgery. The searches were performed on PubMed for publications from the period of 1949 to 2008 using the search terms "head and neck cancer" and "surgery" or "radiotherapy" or "chemotherapy". The number of publications per year was determined in each search. The percentage of publications was also calculated for each subject in each year. An interest factor in a subject (IFS) was also determined. The number of publications was higher for surgery than chemotherapy or radiotherapy. The calculated 1964 IFS for surgery was 14.79...

GoPubMed: exploring PubMed with the Gene Ontology

Doms, Andreas; Schroeder, Michael
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
EN
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25.31%
The biomedical literature grows at a tremendous rate and PubMed comprises already over 15 000 000 abstracts. Finding relevant literature is an important and difficult problem. We introduce GoPubMed, a web server which allows users to explore PubMed search results with the Gene Ontology (GO), a hierarchically structured vocabulary for molecular biology. GoPubMed provides the following benefits: first, it gives an overview of the literature abstracts by categorizing abstracts according to the GO and thus allowing users to quickly navigate through the abstracts by category. Second, it automatically shows general ontology terms related to the original query, which often do not even appear directly in the abstract. Third, it enables users to verify its classification because GO terms are highlighted in the abstracts and as each term is labelled with an accuracy percentage. Fourth, exploring PubMed abstracts with GoPubMed is useful as it shows definitions of GO terms without the need for further look up. GoPubMed is online at . Querying is currently limited to 100 papers per query.

PubMed Informer: Monitoring MEDLINE/PubMed through E-mail Alerts, SMS, PDA downloads and RSS feeds

Muin, Michael; Fontelo, Paul; Ackerman, Michael
Fonte: American Medical Informatics Association Publicador: American Medical Informatics Association
Tipo: Artigo de Revista Científica
Publicado em //2005 EN
Relevância na Pesquisa
25.33%
PubMed Informer is a Web-based monitoring tool for topics of interest from MEDLINE/PubMed primarily designed for healthcare professionals. Five tracking methods are available: Web access, e-mail, Short Message Service (SMS), PDA downloads and RSS feeds. PubMed Informer delivers focused search updates and specific information to users with varying information-seeking practices.

A Pitfall in Accessing the Genbank Sequence Literature

Patrick, Timothy B.; Peterson, Gabriel; Moxley, David
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em //2002 EN
Relevância na Pesquisa
25.34%
We investigated from a user perspective the implications of the unrelatedness of the Entrez-PubMed SI field and the Entrez-PubMed/Nucleotide links. We used GenBank sequence accession numbers as queries against the Entrez-PubMed interface and the Entrez-Nucleotide interface. We compared the article citations available directly through Entrez-PubMed and indirectly through Entrez-Nucleotide. Our results show that in general only by searching both interfaces can a user access all of the PubMed citations available through Entrez for a given sequence.

PubMed QUEST: The PubMed Query Search Tool. An informatics tool to aid cancer centers and cancer investigators in searching the PubMed databases

Hanauer, David A.; Chinnaiyan, Arul M.
Fonte: Libertas Academica Publicador: Libertas Academica
Tipo: Artigo de Revista Científica
Publicado em 12/02/2007 EN
Relevância na Pesquisa
25.35%
Searching PubMed for citations related to a specific cancer center or group of authors can be labor-intensive. We have created a tool, PubMed QUEST, to aid in the rapid searching of PubMed for publications of interest. It was designed by taking into account the needs of entire cancer centers as well as individual investigators. The experience of using the tool by our institution’s cancer center administration and investigators has been favorable and we believe it could easily be adapted to other institutions. Use of the tool has identified limitations of automated searches for publications based on an author’s name, especially for common names. These limitations could likely be solved if the PubMed database assigned a unique identifier to each author.

Understanding PubMed® user search behavior through log analysis

Islamaj Dogan, Rezarta; Murray, G. Craig; Névéol, Aurélie; Lu, Zhiyong
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
25.34%
This article reports on a detailed investigation of PubMed users’ needs and behavior as a step toward improving biomedical information retrieval. PubMed is providing free service to researchers with access to more than 19 million citations for biomedical articles from MEDLINE and life science journals. It is accessed by millions of users each day. Efficient search tools are crucial for biomedical researchers to keep abreast of the biomedical literature relating to their own research. This study provides insight into PubMed users’ needs and their behavior. This investigation was conducted through the analysis of one month of log data, consisting of more than 23 million user sessions and more than 58 million user queries. Multiple aspects of users’ interactions with PubMed are characterized in detail with evidence from these logs. Despite having many features in common with general Web searches, biomedical information searches have unique characteristics that are made evident in this study. PubMed users are more persistent in seeking information and they reformulate queries often. The three most frequent types of search are search by author name, search by gene/protein, and search by disease. Use of abbreviation in queries is very frequent. Factors such as result set size influence users’ decisions. Analysis of characteristics such as these plays a critical role in identifying users’ information needs and their search habits. In turn...

Finding Query Suggestions for PubMed

Lu, Zhiyong; Wilbur, W. John; McEntyre, Johanna R; Iskhakov, Alexey; Szilagyi, Lee
Fonte: American Medical Informatics Association Publicador: American Medical Informatics Association
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
25.33%
It is common for PubMed users to repeatedly modify their queries (search terms) before retrieving documents relevant to their information needs. To assist users in reformulating their queries, we report the implementation and usage analysis of a new component in PubMed called Related Queries, which automatically produces query suggestions in response to the original user’s input. The proposed method is based on query log analysis and focuses on finding popular queries that contain the initial user search term with a goal of helping users describe their information needs in a more precise manner. This work has been integrated into PubMed since January 2009. Automatic assessment using clickthrough data show that each day, the new feature is used consistently between 6% and 10% of the time when it is shown, suggesting that it has quickly become a popular new feature in PubMed.

Enhancing search efficiency by means of a search filter for finding all studies on animal experimentation in PubMed

Hooijmans, Carlijn R; Tillema, Alice; Leenaars, Marlies; Ritskes-Hoitinga, Merel
Fonte: Royal Society of Medicine Press Publicador: Royal Society of Medicine Press
Tipo: Artigo de Revista Científica
Publicado em /07/2010 EN
Relevância na Pesquisa
25.34%
Collecting and analysing all available literature before starting an animal experiment is important and it is indispensable when writing a systematic review (SR) of animal research. Writing such review prevents unnecessary duplication of animal studies and thus unnecessary animal use (Reduction). One of the factors currently impeding the production of ‘high-quality’ SRs in laboratory animal science is the fact that searching for all available literature concerning animal experimentation is rather difficult. In order to diminish these difficulties, we developed a search filter for PubMed to detect all publications concerning animal studies. This filter was compared with the method most frequently used, the PubMed Limit: Animals, and validated further by performing two PubMed topic searches. Our filter performs much better than the PubMed limit: it retrieves, on average, 7% more records. Other important advantages of our filter are that it also finds the most recent records and that it is easy to use. All in all, by using our search filter in PubMed, all available literature concerning animal studies on a specific topic can easily be found and assessed, which will help in increasing the scientific quality and thereby the ethical validity of animal experiments.

Using Noun Phrases for Navigating Biomedical Literature on Pubmed: How Many Updates Are We Losing Track of?

Srikrishna, Devabhaktuni; Coram, Marc A.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 14/09/2011 EN
Relevância na Pesquisa
25.34%
Author-supplied citations are a fraction of the related literature for a paper. The “related citations” on PubMed is typically dozens or hundreds of results long, and does not offer hints why these results are related. Using noun phrases derived from the sentences of the paper, we show it is possible to more transparently navigate to PubMed updates through search terms that can associate a paper with its citations. The algorithm to generate these search terms involved automatically extracting noun phrases from the paper using natural language processing tools, and ranking them by the number of occurrences in the paper compared to the number of occurrences on the web. We define search queries having at least one instance of overlap between the author-supplied citations of the paper and the top 20 search results as citation validated (CV). When the overlapping citations were written by same authors as the paper itself, we define it as CV-S and different authors is defined as CV-D. For a systematic sample of 883 papers on PubMed Central, at least one of the search terms for 86% of the papers is CV-D versus 65% for the top 20 PubMed “related citations.” We hypothesize these quantities computed for the 20 million papers on PubMed to differ within 5% of these percentages. Averaged across all 883 papers...

Materia Socio Medica is Indexed in Pubmed and Archived in PubMed Central

Masic, Izet
Fonte: AVICENA, d.o.o., Sarajevo Publicador: AVICENA, d.o.o., Sarajevo
Tipo: Artigo de Revista Científica
Publicado em //2013 EN
Relevância na Pesquisa
25.33%
Materia Socio Medica Journal has been accepted for archiving in PubMed Central from 2011. The journal started in 1993 as offi cial journal of Social Medicine Association of B&H. During last 3 years Mat Soc Med has included in almost all femous on-line databases (except WoS). All issues of Mat Soc Med published in 2012 are now visible on PubMed/PubMed Central.

Predicting clicks of PubMed articles

Mao, Yuqing; Lu, Zhiyong
Fonte: American Medical Informatics Association Publicador: American Medical Informatics Association
Tipo: Artigo de Revista Científica
Publicado em 16/11/2013 EN
Relevância na Pesquisa
25.35%
Predicting the popularity or access usage of an article has the potential to improve the quality of PubMed searches. We can model the click trend of each article as its access changes over time by mining the PubMed query logs, which contain the previous access history for all articles. In this article, we examine the access patterns produced by PubMed users in two years (July 2009 to July 2011). We explore the time series of accesses for each article in the query logs, model the trends with regression approaches, and subsequently use the models for prediction. We show that the click trends of PubMed articles are best fitted with a log-normal regression model. This model allows the number of accesses an article receives and the time since it first becomes available in PubMed to be related via quadratic and logistic functions, with the model parameters to be estimated via maximum likelihood. Our experiments predicting the number of accesses for an article based on its past usage demonstrate that the mean absolute error and mean absolute percentage error of our model are 4.0% and 8.1% lower than the power-law regression model, respectively. The log-normal distribution is also shown to perform significantly better than a previous prediction method based on a human memory theory in cognitive science. This work warrants further investigation on the utility of such a log-normal regression approach towards improving information access in PubMed.

PubstractHelper: A Web-based Text-Mining Tool for Marking Sentences in Abstracts from PubMed Using Multiple User-Defined Keywords

Chen, Chou-Cheng; Ho, Chung-Liang
Fonte: Biomedical Informatics Publicador: Biomedical Informatics
Tipo: Artigo de Revista Científica
Publicado em 27/11/2014 EN
Relevância na Pesquisa
25.33%
While a huge amount of information about biological literature can be obtained by searching the PubMed database, reading through all the titles and abstracts resulting from such a search for useful information is inefficient. Text mining makes it possible to increase this efficiency. Some websites use text mining to gather information from the PubMed database; however, they are database-oriented, using pre-defined search keywords while lacking a query interface for user-defined search inputs. We present the PubMed Abstract Reading Helper (PubstractHelper) website which combines text mining and reading assistance for an efficient PubMed search. PubstractHelper can accept a maximum of ten groups of keywords, within each group containing up to ten keywords. The principle behind the text-mining function of PubstractHelper is that keywords contained in the same sentence are likely to be related. PubstractHelper highlights sentences with co-occurring keywords in different colors. The user can download the PMID and the abstracts with color markings to be reviewed later. The PubstractHelper website can help users to identify relevant publications based on the presence of related keywords, which should be a handy tool for their research.

PubMed Medical publications from Libya

Bakoush, O; Al-Tubuly, AA; Ashammakhi, N; Elkhammas, EA
Fonte: CoAction Publishing Publicador: CoAction Publishing
Tipo: Artigo de Revista Científica
Publicado em 01/09/2007 EN
Relevância na Pesquisa
25.34%
Medical research and publications are the back-bone for advancing the medical field. We identified the Pubmed medical publications that are affiliated with Libya to shed some light on the contribution of this country's medical community to the PubMed database. All publications affiliated with Libya in the PubMed were counted over a five year period ending December 2006. We also used the same method to obtain data on the PubMed medical publications from Tunisia, Morocco and Yemen. Tunisia had the largest number of PubMed publications among the studied countries: 20.4 publications per million population per year and 7.2 publications per year per one billion US$ GDP. Libya had much fewer publications: 2.4 publications per million population per year and 0.4 publications per one billion US$ GDP. The citation frequency for Libyan published research was very low compared to Tunisian and Moroccan related research. Conclusion: This preliminary analysis shows that medical research output in Libya is about twenty times less than in other countries with similar backgrounds, and that it needs to be enhanced.

Qatar biomedical and cancer publications in PubMed between 2000 and 2012

Zeeneldin, Ahmed A.; Taha, Fatma Mohamed
Fonte: Bloomsbury Qatar Foundation Journals Publicador: Bloomsbury Qatar Foundation Journals
Tipo: Artigo de Revista Científica
Publicado em 16/06/2014 EN
Relevância na Pesquisa
25.33%
Background: The aim of this work was to analyse the past trends of biomedical and cancer publications from Qatar listed on PubMed for the years 2000–2012. These findings were then compared with the corresponding global number of publications. Methods: PubMed was searched for cancer publications, clinical trials, publications on humans or other species. Searching for “Qatar*” in the “Affiliation” field yielded the lowest number of publications; searching for “Qatar*” in the “Affiliation” or in “Title/Abstract” yielded a moderate number of results and searching for “Qatar*” in the “Affiliation” or “Title/Abstract” or “Text Word” fields yielded the highest number of publications. The annual percentage change (APC) from one year to the next was calculated for the population and each type of publication. Information on the population of Qatar was gathered from the website of Qatar Statistics Authority to determine the correlation of papers published per 1000 population. Results: The number of publications retrieved from PubMed was not particularly different for each variation of search carried out. However, the most representative number of publications was retrieved upon searching for “Qatar*” in the “Affiliation” or in “Title/Abstract” fields. Between the years 2000 and 2012...

Risk Factors for Bladder Cancer: Challenges of Conducting a Literature Search Using PubMed

Joshi, Ashish; Preslan, Elicia
Fonte: American Health Information Management Association Publicador: American Health Information Management Association
Tipo: Artigo de Revista Científica
Publicado em 01/04/2011 EN
Relevância na Pesquisa
25.33%
The objective of this study was to assess the risk factors for bladder cancer using PubMed articles from January 2000 to December 2009. The study also aimed to describe the challenges encountered in the methodology of a literature search for bladder cancer risk factors using PubMed. Twenty-six categories of risk factors for bladder cancer were identified using the National Cancer Institute Web site and the Medical Subject Headings (MeSH) Web site. A total of 1,338 PubMed searches were run using the term “urinary bladder cancer” and a risk factor term (e.g., “cigarette smoking”) and were screened to identify 260 articles for final analysis. The search strategy had an overall precision of 3.42 percent, relative recall of 12.64 percent, and an F -measure of 5.39 percent. Although search terms derived from MeSH had the highest overall precision and recall, the differences did not reach significance, which indicates that for generalized, free-text searches of the PubMed database, the searchers' own terms are generally as effective as MeSH terms.

Using PubMed in radiology: Ten useful tips for radiologists

Sriganesh, Vasumathi
Fonte: Medknow Publications Publicador: Medknow Publications
Tipo: Artigo de Revista Científica
Publicado em //2011 EN
Relevância na Pesquisa
25.34%
PubMed contains a bibliography of articles published in around 4800 journals. It combines MEDLINE and OLDMEDLINE (articles from 1960, going back till the 1940s). PubMed is updated on a daily basis; to include both published and ahead of print references. As a radiologist, one can use PubMed to track several journals, track topics, search for specific topics, verify incomplete or incorrect references, store one's own publications, and save selected references; one can also create filters depending on one's own search needs for some regular topics. This article provides some key background knowledge on searching PubMed and also describes some features that are often left unexplored. The PubMed site has undergone many changes in the last few years and this article will update users on the current features.

Public accessibility of biomedical articles from PubMed Central reduces journal readership—retrospective cohort analysis

Davis, Philip M.
Fonte: Federation of American Societies for Experimental Biology Publicador: Federation of American Societies for Experimental Biology
Tipo: Artigo de Revista Científica
Publicado em /07/2013 EN
Relevância na Pesquisa
25.34%
Does PubMed Central—a government-run digital archive of biomedical articles—compete with scientific society journals? A longitudinal, retrospective cohort analysis of 13,223 articles (5999 treatment, 7224 control) published in 14 society-run biomedical research journals in nutrition, experimental biology, physiology, and radiology between February 2008 and January 2011 reveals a 21.4% reduction in full-text hypertext markup language (HTML) article downloads and a 13.8% reduction in portable document format (PDF) article downloads from the journals' websites when U.S. National Institutes of Health-sponsored articles (treatment) become freely available from the PubMed Central repository. In addition, the effect of PubMed Central on reducing PDF article downloads is increasing over time, growing at a rate of 1.6% per year. There was no longitudinal effect for full-text HTML downloads. While PubMed Central may be providing complementary access to readers traditionally underserved by scientific journals, the loss of article readership from the journal website may weaken the ability of the journal to build communities of interest around research papers, impede the communication of news and events to scientific society members and journal readers...