Search for the Yellow Pages -- look around the house and try to remember where you left it. Search the Yellow Pages -- look inside the Yellow Pages for a product or service you're interested in. Does that related example help? Once you find it, you will download it. After it's installed, it's possible you can "search PageResults" or "use PageResults to search" for information. I'm not quite sure, which is why I offered the example at the top. You can look for other threads by putting search for in the Search box at the top of the page I didn't see anything too helpful at first glance, so I answered here.
Last edited: Apr 30, To search for something is to look for it, to try to find it, as in: I'm searching for my keys; I don't know where I left them. The police searched for the weapon the murderer had used. The search field tags [dp] and [pdat] may be used interchangeably for publication date searching. To enter a date range search, insert a colon : between each date, e. Describes the material presented in the article e.
Citations may include multiple Publication Types. Use the search tag [pt] with any PubMed Publication Type , e. Publication Types are arranged hierarchically with more specific terms arranged beneath broader terms, and publication types automatically include the more specific publication types in a search.
To turn off this automatic feature, use the search syntax [pt:noexp], e. The SI field identifies secondary source databanks and accession numbers, e. The field is composed of the source followed by a slash followed by an accession number and can be searched with one or both components, e. To retrieve all citations with an SI value, search hasdatabanklist.
The subset field is a method of restricting retrieval by subject, citation status and journal category, with the search tag [SB]. See also filters and Find related resources using LinkOut. Includes chemical, protocol, disease or organism terms. Synonyms to the supplementary concepts will automatically map when tagged with [nm]. This field was implemented in mid; however, many chemical names are searchable as MeSH terms before that date.
Words and numbers included in the title of a citation, as well as the collection title for book citations. Words and numbers included in a citation's title, collection title, abstract, other abstract and keywords.
English language abstracts are taken directly from the published article. If an article does not have a published abstract, NLM does not create one. Words and numbers in title originally published in a non-English language, in that language.
Non-Roman alphabet language titles are transliterated. Transliterated title is not included in Text Word [TW] retrieval. Untagged terms that are entered in the search box are matched in this order against a Subject translation table including MeSH Medical Subject Headings , a Journals translation table, the Author index, and an Investigator Collaborator index. When a match is found for a term or phrase in a translation table the mapping process is complete and does not continue on to the next translation table.
To see how your terms were translated, check the Search Details available on the Advanced Search page for each query under History. If you want to report a translation that does not seem accurate for your search topic, please e-mail the information to the NLM Help Desk. If a match is found in this translation table, the term will be searched as MeSH that includes the MeSH term and any specific terms indented under that term in the MeSH hierarchy , and in all fields.
If you enter an entry term for a MeSH term the translation will also include an all fields search for the MeSH term associated with the entry term. Substance name mappings do not include a mapping for individual terms in a phrase, e. MeSH term mappings that include a standalone number or single character do not include a mapping for individual terms in a phrase, e. These will automatically map to the journal abbreviation that is used to search journals in PubMed and in all fields.
If the term is not found in the above tables, and is not a single term, PubMed checks the author index for a match. The author index includes author names and initials, as well as full author names for articles published from forward, if available. If the term is not found in the above tables, except for Author, and is not a single term, the investigator index is consulted for a match.
The investigator collaborator index includes full names, if available. Enter a full investigator name in natural or inverted order, e. PubMed breaks apart the phrase and repeats the above automatic term mapping process until a match is found. PubMed ignores stopwords in searches. If there is no match, the individual terms will be combined ANDed together and searched in all fields. When a search includes terms that were tagged with a search field during the automatic term mapping process and retrieves zero results, the system triggers a subsequent search using "Schema: all.
The learned ranking algorithm combines over signals that are helpful for finding best matching results. Most of these signals are computed from the query-document term pairs e. The new ranking model was built on relevance data extracted from the anonymous and aggregated PubMed search logs over an extended period of time.
The PubMed database contains citations and abstracts to biomedical literature, facilitating searching across several NLM literature resources:. PubMed Central PMC is a full text archive that includes articles from journals reviewed and selected by NLM for archiving current and historical , as well as individual articles and preprints collected for archiving in compliance with funder policies.
Citations to these preprints are deposited in PubMed. Bookshelf is a full text archive of books, reports, databases, and other documents related to biomedical, health, and life sciences.
PubMed includes citations for books and some individual chapters available on Bookshelf. The tags are presented in alphabetical order. Some of the tags e. Other tags e. You can download records in PubMed format as a text file. Note: Not all fields are searchable in PubMed. See: Search Field Descriptions and Tags. Antivirus software may affect page caching which can result in unexpected page expired messages. Also, nlm. You may have to delete your browser's cache temporary files before trying to access PubMed again.
Please contact the journal publisher directly to report an error and initiate a correction to PubMed citations for content other than MeSH. NLM provides data to vendors around the world. Other products and services will not necessarily immediately reflect corrections made to PubMed records. If you search through a vendor's system, please contact your vendor about their maintenance schedules.
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To use these interactive features you need to enable cookies on your computer. Consult your browser's help for information on enabling cookies. If you have problems using cookie-dependent features of PubMed, even after enabling cookies, possible reasons may include:.
Some characters have special meaning in MeSH fields:. Publication types found in PubMed are listed below. Most article type filters use the article type name with the publication type [pt] search field tag; for example, "multicenter study"[pt]. The Systematic Review filter uses a search strategy in addition to the publication type [pt]. The language filters use the language name with the language [la] search field tag; for example, esperanto[la]. The COVID article filters limit retrieval to citations about the novel coronavirus; these filters may evolve over time.
The Clinical Queries search strategies have been updated based on new evidence from Haynes et al. The current strategies have better performance than their predecessors. Details of methods appear in the references below. The neighbors of a document are those documents in the database that are the most similar to it. The similarity between documents is measured by the words they have in common, with some adjustment for document lengths.
To carry out such a program, one must first define what a word is. For us, a word is basically an unbroken string of letters and numerals with at least one letter of the alphabet in it.
Words end at hyphens, spaces, new lines, and punctuation. The common, but uninformative, words also known as stopwords are eliminated from processing at this stage.
Next, a limited amount of stemming of words is done, but no thesaurus is used in processing. Words from the abstract of a document are classified as text words. Words from titles are also classified as text words, but words from titles are added in a second time to give them a small advantage in the local weighting scheme.
MeSH terms are placed in a third category, and a MeSH term with a subheading qualifier is entered twice, once without the qualifier and once with it. If a MeSH term is starred indicating a major concept in a document , the star is ignored. These three categories of words or phrases in the case of MeSH comprise the representation of a document.
No other fields, such as Author or Journal, enter into the calculations. Having obtained the set of terms that represent each document, the next step is to recognize that not all words are of equal value. Each time a word is used, it is assigned a numerical weight.
This numerical weight is based on information that the computer can obtain by automatic processing. Automatic processing is important because the number of different terms that have to be assigned weights is close to two million for this system. The weight or value of a term is dependent on three types of information: 1 the number of different documents in the database that contain the term; 2 the number of times the term occurs in a particular document; and 3 the number of term occurrences in the document.
The first of these pieces of information is used to produce a number called the global weight of the term. The global weight is used in weighting the term throughout the database. The second and third pieces of information pertain only to a particular document and are used to produce a number called the local weight of the term in that specific document. When a word occurs in two documents, its weight is computed as the product of the global weight times the two local weights one pertaining to each of the documents.
The global weight of a term is greater for the less frequent terms. This is reasonable because the presence of a term that occurred in most of the documents would really tell one very little about a document. On the other hand, a term that occurred in only documents of one million would be very helpful in limiting the set of documents of interest.
A word that occurred in only 10 documents is likely to be even more informative and will receive an even higher weight. The local weight of a term is the measure of its importance in a particular document. Generally, the more frequent a term is within a document, the more important it is in representing the content of that document. It usually implies something more thorough than just looking.
Real-life examples: People search for buried treasure, missing children, and things that they have lost, among many other things. Sometimes, people are said to search for abstract things, such as meaning or happiness.
Search also means to look closely at or examine a person or thing to find something that may be concealed or hidden. Real-life examples: Police and security guards search people to check for weapons or illegal items they may be hiding on themselves or in something they own. Collectors or appraisers will often search an item for damage or signs that something may be fake.
Search is also commonly used in the context of searching the internet, a website, or an individual webpage. This process is called a search. Used in a sentence: I searched for the exact phrase, but there were no results, so I tried another search using only keywords. As a noun, search also commonly refers to the process of trying to find something.
An investigation is a kind of search for the truth. Real-life examples: Police often conduct searches to find missing people or suspects. People participate in or start searches focused on finding many different things, such as romantic partners, colleges, missing wallets, or answers to questions.
The first records of the word search come from the early s. Search shares an origin with the words circle and circus. What are some other forms related to search? Asked 10 years, 7 months ago. Active 5 years, 9 months ago. Viewed 42k times. Improve this question. Daniel Roman Yankovsky Roman Yankovsky 2 2 gold badges 6 6 silver badges 10 10 bronze badges. Same difference as in Russian, actually and French and German and Spanish Add a comment. Active Oldest Votes. In these sentences, find doesn't imply a search has been done.
Improve this answer. You search for something you need to find. I searched on the internet.
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