Archive for the ‘Search Tools’ Category
Have you wondered how to locate recordings of webinars or other online presentations hosted by government agencies, private organizations, or academic institutions on health information outreach topics? If so, use the following resources as a helpful guide:
The National Library of Medicine has just released a new design for its main Web site search engine results page. The new design is responsive and is a result of usability testing, analytics, and user feedback. Searches for health topics will feature a MedlinePlus result on the right side of the screen. Search results from PubMed and the LocatorPlus catalog record will display separately, also on the right. Searches for an NLM product or service will highlight a curated result in the “NLM Recommended Resources” box. The facets have been combined into four basic categories and now can be found above the results display. They include:
- Health Information: MedlinePlus encyclopedia pages, drug monographs, health topic pages, supplement pages, and MedlinePlus Magazine pages.
- Programs and Services: NLM main Web site pages including NCBI and SIS.
- Exhibits and Collections: History of Medicine Division exhibition sites and the Digital Collections records.
- Web Archives: Older Web pages from the NLM main Web site.
Further details about the redesigned web site are available in the NLM Technical Bulletin.
Registration is available for the one-hour NN/LM webinar Five Questions You Can Answer Using the NCBI Gene Database, on Thursday, March 9, 10:00-11:00 AM PST. Presenters will be Peter Cooper and Bonnie Maidak from NCBI. The Gene resource at the National Center for Biotechnology Information (NCBI) is a central hub for accessing nearly all molecular and literature resources for a particular gene. You can easily answer the most common questions and perform the most common tasks by starting in Gene. This webinar will cover the structure and contents of the Gene resource and how to use it to answer the following questions:
- Where is the gene located (chromosome and position) in the genome assembly?
- What are the Reference genomic, transcript and protein sequences for the gene?
- What variations are present in the gene and are they associated with disease?
- In what tissues and under what conditions is the gene expressed?
- What are the equivalent genes (homologs) in other species?
An enhanced relevance algorithm for the “Best Match” sort order is coming to PubMed. The new algorithm incorporates machine learning to re-rank the top articles returned for improved relevance. The standard PubMed Best Match sort is based on a weighted term frequency algorithm. This approach calculates the frequency with which terms appear in PubMed records. Those frequencies are then applied in a weighted fashion to return a ranked list of PubMed citations that match your query terms. The new relevance algorithm includes machine learning to re-rank the top articles returned. This algorithm combines over 150 signals that are helpful for finding best matching results. Most of these signals are computed from the number of matches between the search terms and the PubMed record, while others are either specific to a record (e.g., publication type; publication year) or specific to a search (e.g., search length). The new ranking model was built on relevance data obtained from anonymous PubMed search logs that were aggregated over an extended period of time.
Because the “Best Match” results are calculated using a new machine learning environment, there might be a slight change in total search results when sorting by “Best Match.” Users who sort by “Best Match” are typically clicking through citations on the first page of retrieval; therefore, it is important for NLM to continue to incorporate new tools to improve this ranking. The new machine learning system achieves significant improvement in retrieval performance over the weighted term frequency algorithm alone. Additionally, the “Search details” portlet will be replaced with “Best match search information” that will display translations to MeSH, etc., and additional synonyms under the “See more…” link. The Search button will not be available for the new portlet used for “Best Match” results. To use “Best Match” as the default sort order for PubMed results, change your preferences in My NCBI. For additional details and illustrations, visit the NLM Technical Bulletin.
The NN/LM South Central Region is sponsoring the webinar series, Pieces of Systematic Review, featuring guest speaker Margaret Foster, on the first Thursday of every month from Febuary – July at 8:00-9:00am PT. The first session will be held Thursday, February 2. Systematic reviews are well-documented as contributing to evidence-based healthcare by, in part, revealing gaps in the literature or illustrating the effectiveness of health interventions. They are common practice, but they can often be fraught with issues in how they’re conducted, leaving a constant need for education and discussion. Margaret Foster is an Associate Professor at Texas A&M University and serves as the Systematic Reviews Coordinator at the Medical Sciences Library with a joint position at the School of Public Health and the College of Medicine of the Texas A&M University Health Sciences Center. The series will highlight the following topics:
- February 2, 2017 – How do you determine if a research question is right for a systematic review?
- March 2, 2017 – What searches beyond the typical databases should be done?
- April 6, 2017 – What happens after the search?
- May 4, 2017 – What free software is useful for conducting review?
- June 1, 2017 – How can a librarian support other types of reviews (scoping, integrative, rapid)?
- July 6, 2017 – What are the new developments in review methods?
The 2017 winter edition of the NLM Classification has been issued. It has moved from an annual spring update to twice-yearly updates. The 2017 winter edition includes several additions and changes to the Index and Schedules. All main index headings are now linked to the 2017 vocabulary in the MeSH Browser. The 2017 summer version will be published in mid-to-late August, and will encompass the ongoing systematic review of particular classification schedules and other miscellaneous updates. The PDF version will be published annually in conjunction with the summer version. Contact NLM for further information, questions, or comments.
NLM’s AIDSource now offers PrEP Navigation Resources and HIV Navigation Resources. These resources, selected by subject matter experts, are designed to assist frontline “navigators” who work with affected populations. Pre-exposure prophylaxis (PrEP) is a once daily pill that helps protect against HIV. Resources include basic information about PrEP and navigator training tools. The HIV navigation resources cover retention in HIV care and tools for patient navigators. Both sets of navigation resources link to content for Spanish speakers.
Beginning February 21, 2017, the National Library of Medicine will present the three-part Webinar series, Insider’s Guide to Accessing NLM Data: EDirect for PubMed. This series of workshops will introduce new users to the basics of using EDirect to access exactly the PubMed data you need, in the format you need. Over the course of three 90-minute sessions, students will learn how to use EDirect commands in a Unix environment to access PubMed, design custom output formats, create basic data pipelines to get data quickly and efficiently, and develop simple strategies for solving real-world PubMed data-gathering challenges. No prior Unix knowledge is required; novice users are welcome!
Registration is currently open for the February/March 2017 series:
- Part 1: Getting PubMed Data, Tuesday, February 21, 10:00 – 11:30 AM PST
- Part 2: Extracting Data from XML, Tuesday, February 28, 10:00 – 11:30 AM PST
- Part 3: Building Practical Solutions, Tuesday, March 7, 10:00 – 11:30 AM PST
Students are expected to attend Part 1, Part 2, and Part 3 in a single series. Due to the nature of this class, registration will be limited to 50 students per offering.
This series of classes involves hands-on demonstrations and exercises. Before registering for these classes, NLM strongly recommends the following:
- Watch the first Insider’s Guide class “Welcome to E-utilities for PubMed” or be familiar with the basic concepts of APIs and E-utilities.
- Be familiar with structured XML data (basic syntax, elements, attributes, etc.)
- Have access to a Unix command-line environment on your computer (see the Installing EDirect page for more information.)
- Install the EDirect software (see the Installing EDirect page for more information.)
The National Library of Medicine has announced two additions to the NLM Digital Collections, the Library’s free online repository of biomedical resources including books, still images, videos, and maps.
Incunabula: A collection of books and broadsides printed in Europe before 1501 includes over forty items from the Library’s world-renowned collection of more than 580 incunabula on subjects relating to science and medicine, from printed classical works of Galen and Hippocrates to materials on the plague and other “pestilences.” Incunabula (from the Latin for “cradle”) are books and other materials produced with movable type on a printing press between the mid-1450s through the end of 1500 — the infancy of the age of printing. This digital collection will grow over time as the Library scans more incunabula titles.
World War 2, 1939-1949: A collection of U.S. government documents includes more than 1,500 federal, state, and local government publications. Among the variety of materials included are government reports, first aid manuals, informational pamphlets, and recruitment materials that demonstrate the efforts of government, military personnel, health professionals, and scientists, among others, on the home front and overseas during and immediately following the Second World War.
All of the content in NLM Digital Collections is freely available worldwide and, unless otherwise indicated, in the public domain. As with all printed materials added to the NLM Digital Collections, items from these new collections will also be included in the Internet Archive, and as part of the Medical Heritage Library through the ongoing collaboration with that international digital curation collaborative. More information about the content of these two new digital collections is available from the NLM History of Medicine Division Reference Desk.
There are several class offerings coming up from the NNLM Training Office (NTO). Class details and registration links are available in the NLM Technical Bulletin, or you can visit Training Opportunities to see a schedule of classes that are open to all regions.
PubMed® for Librarians Series: Six Classes
Sessions on January 19 and 25; February 1, 8, 16, and 23, 10:00-11:30 AM PST. Learn about concepts such as using MeSH to build a search, PubMed’s Automatic Term Mapping (ATM) feature, building and refining PubMed searches, using PubMed features that facilitate evidence-based searching, and customizing PubMed searches with the NCBI feature.
Teaching Topics: Classroom Assessment on the Fly
Sessions on either January 11 or February 15, 10:00-11:00 AM PST offer a brief review of the types of assessment available and different methods to use for instantaneous feedback, from low tech polling to one-minute papers.
NLM Webinar: 2017 MeSH Highlights, January 27, 9:00-10:00 AM PST
This session provides a 30-minute highlights tour of the 2017 MeSH, followed by a Q&A with MeSH experts.
Running from March 1 through 31, this class offers the opportunity to discover TOXNET and other NLM environmental health databases with a guided, self-paced, online format involving thirteen independent modules.