The search interface is made of three sections: Search, Explore, and Results. These are described in detail below.
You may start searching either from the Search section or from the Explore section.
Search
This section shows your current search criteria and allows you to submit keywords to search in the library.
Each new submission adds the entered keywords to the list of search criteria.
To start a new search instead of adding keywords to the current search, use the Reset search button, then enter your new keywords.
To replace an already submitted keyword, first remove it by unchecking its checkbox, then submit a new keyword.
You may control the extent of your search by selecting where to search. The options are:
Everywhere: Search your keywords in all bibliographic record fields and in the text content of the available documents.
In authors or contributors: Search your keywords in author or contributor names.
In titles: Search your keywords in titles.
In all fields: Search your keywords in all bibliographic record fields.
In documents: Search your keywords in the text content of the available documents.
You may use boolean operators with your keywords. For instance:
AND: Finds entries that contain all specified terms. This is the default relation between terms when no operator is specified, e.g., a b is the same as a AND b.
OR: Finds entries that contain any of the specified terms, e.g., a OR b.
NOT: Excludes entries that contain the specified terms, e.g., NOT a.
Boolean operators must be entered in UPPERCASE.
You may use logical groupings (with parentheses) to eliminate ambiguities when using multiple boolean operators, e.g., (a OR b) AND c.
You may require exact sequences of words (with double quotes), e.g., "a b c". The default difference between word positions is 1, meaning that an entry will match if it contains the words next to each other, but a different maximum distance may be specified (with the tilde character), e.g., "web search"~2 allows up to 1 word between web and search, meaning it could match web site search as well as web search.
You may specify that some words are more important than others (with the caret), e.g., faceted^2 search browsing^0.5 specifies that faceted is twice as important as search when computing the relevance score of the results, while browsing is half as important. Such term boosting may be applied to a logical grouping, e.g., (a b)^3 c.
Keyword search is case-insentitive, accents are folded, and punctuation is ignored.
Stemming is performed on terms from most text fields, e.g., title, abstract, notes. Words are thus reduced to their root form, saving you from having to specify all variants of a word when searching, e.g., terms such as search, searches, and searching all produce the same results. Stemming is not applied to text in name fields, e.g., authors/contributors, publisher, publication.
Explore
This section allows you to explore categories associated with the references.
Categories can be used to filter your search. Check a category to add it to your search criteria and narrow your search. Your search results will then only show entries that are associated with that category.
Uncheck a category to remove it from your search criteria and broaden your search results.
The numbers shown next to the categories indicate how many entries are associated with each category in the current set of results. Those numbers will vary based on your search criteria to always describe the current set of results. Likewise, categories and whole facets will disappear when the result set has no entry associated to them.
An arrow icon () appearing next to a category indicates that subcategories are available. You may press it to expand a list of more specific categories. You may press it again later to collapse the list. Expanding or collapsing subcategories will not change your current search; this allows you to quickly explore a hierarchy of categories if desired.
Results
This section shows the search results. When no search criteria has been given, it shows the full content of the library (up to 20 entries per page).
Each entry of the results list is a link to its full bibliographic record. From the bibliographic record view, you may continue exploring the search results by going to previous or following records in your search results, or you may return to the list of results.
Additional links, such as Read document or View on [website name], may appear under a result. These give you quick access to the resource. Those links will also be available in the full bibliographic record.
The Abstracts button lets you toggle the display of abstracts within the list of search results. Enabling abstracts, however, will have no effect on results for which no abstract is available.
Various options are provided to let you sort the search results. One of them is the Relevance option, which ranks the results from most relevant to least relevant. The score used for ranking takes into account word frequencies as well as the fields where they appear. For instance, if a search term occurs frequently in an entry or is one of very few terms used in that entry, that entry will probably rank higher than another where the search term occurs less frequently or where lots of other words also occur. Likewise, a search term will have more effect on the scores if it is rare in the whole library than if it is very common. Also, if a search term appears in, e.g., the title of an entry, it will have more effect on the score of that entry than if it appeared in a less important field such as the abstract.
The Relevance sort is only available after keywords have been submitted using the Search section.
Categories selected in the Explore section have no effect on the relevance score. Their only effect is to filter the list of results.
Studies on representative series of South African Black schoolchildren aged 10-12 years revealed the following. (1) In the age sex groups, mean proportions lying below the Boston 3rd percentile of weight for age were high (a very common phenomenon), ranging from 20-84 per cent. (2) Of total moieties above and below the 3rd percentile, 96 per cent and 95 per cent had normal weight for height (more than 80 per cent of the 50th percentile of reference standards). (3) Both moieties had equally...
An African Dilemma: University Students, Development, and Politics in Ghana, Tanzania, and Uganda. By Joel D. Barkan. (Nairobi: Oxford University Press, 1975. Pp. vii + 259. 9.00, paper.) - Volume 71 Issue 4
Education in South Africa, Vol. II, 1923–1975 by E. G. Malherbe Wynberg, Cape, Juta, 1977. Pp. 783. R15. - The Education System in Southern Africa by R. M. Ruperti Pretoria, J. L. van Schaik, 1976. Pp. 181. R4.75. - Volume 15 Issue 4
Volcano-magnetic effects provide a possible way of monitoring temperature or stress changes within a volcano. A systematic study of several volcanoes in and close to the Rabaul caldera in east New Britain, Papua New Guinea, has been made to identify those in which thermal changes would be expected to cause changes in magnetic field. Two out of nine were chosen as suitable for a programme of magnetic monitoring which commenced in February 1974 and is continued at approximately six monthly...
An African Dilemma: University Students, Development, and Politics in Ghana, Tanzania, and Uganda. By Joel D. Barkan. (Nairobi: Oxford University Press, 1975. Pp. vii + 259. 9.00, paper.) - Volume 71 Issue 4
A specially-designed test was used in three related investigations concerned with the ability of Nigerian secondary-school students to understand depth relationships in pictures. The first investigation demonstrated that the percentage of students unable to achieve the criterion performance decreased significantly from 61.7% for second-year students to 22.5% for fifth-year students. Both groups were significantly poorer in performance than a sample of English third-year students. In the...
Two experiments were carried out to compare the effectiveness of different ways of producing the frames in a remedial self-instructional program intended to improve the ability of Nigerian secondary students to understand spatial relationships in pictures. In one experiment with Yoruba students, it was demonstrated that the use of stereoscopic pictures brought about an improvement in performance, whereas planoscopic pictures and models did not. In contrast, a second experiment with Hausa...