Problems in Using Census Data.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Barabba, Vincent P.
Format:	Recurso educativo Open Access
Language:	en
Published:	1974
Subjects:	Census Figures Information Dissemination Information Needs Information Services Information Systems Information Utilization Library Associations Library Collections Library Planning Use Studies
Online Access:	Acceder al recurso
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SLA Responds to U.S. Government Information Issues in the '80s.
by: Morton, Sandy I.
Published: (1988)

Something for Everyone: A Multidisciplinary Approach to Census Data.
by: Skiffington, Frances W.
Published: (1995)

Library Service from Numerical Data Bases: The 1970 Census as a Paradigm
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Published: (1974)

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by: Goldstein, Bernard, et al.
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Optimum Degree of User Participation in SDI Profile Generation.
by: Evans, L.
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Project Intrex; A Brief Description.
by: Overhage, Carl F. J.
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The Information Needs, Usage and Attitudes of Medical Researchers in Australia. First Report to the National Library of Australia.
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The Machine Readable Data Center: A Model Approach to Data Services in Academic Research Libraries.
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Are Libraries Causing or Utilizing the Information Explosion?
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Published: (1973)

Providing Access to the 1990 U.S. Census Maps.
by: Weintrop, Jane
Published: (1995)

The Library of the National Institute of Education: A Proposal (First Draft).
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Published: (1972)

Data--Power to the People.
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The Development of Hertis.
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Published: (1969)

Fee or Free: The Effect of Charging on Information Demand.
by: Huston, Mary M.
Published: (1979)

Analysis of Monograph Obsolescence at Two Levels of an Interlibrary Loan Network.
by: Rouse, Sandra H., et al.
Published: (1979)

Information Needs of the Ceramic Industry; A Users-Need Study.
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Old Bridge Township: Its People...Its Library.
by: Eggers, Sara H., et al.
Published: (1976)

Community Analysis for Responsive Library Service.
by: Chamberlain, William R.
Published: (1978)

The Census and the Computer
by: Jones, Ray
Published: (1973)

Promoting U.S. Census Data in an Academic Environment: Opportunities and Challenges.
by: Ragains, Patrick
Published: (1995)

Public Library Service in Lucas County, Ohio: An Evaluation with Recommendations.
Published: (1968)

New Approaches to Studying Library Use
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Published: (1971)

An Analysis of Arlington, Massachusetts and Its Robbins Library.
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Nature of Typical Data Bases. Final Report on Mechanized Information Services in the University Library, Phase I - Planning. Part 5.
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Engineering Libraries: A User Survey
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Library Service to Industry; Series of Two Workshops: [San Diego, June 16, 1970; San Leandro, June 19, 1970.]
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Library Service to Industry; Series of Four Workshops.
Published: (1969)

Contrasting Patterns of Specialized Library Use
by: Ebert, Mary Hilda
Published: (1971)

The Planning of Library and Documentation Services. Working Draft.
by: Sewell, P. H.
Published: (1969)

Federal Information Resources: Identification, Availability and Use; Proceedings of a Conference, Washington, D.C., March 26-27, 1970.
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Scholars' Access to Information: Public Responsibility/Private Initiative. Minutes of the Ninety-Ninth Meeting, October 29-30, 1981, Washington, D.C.
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The Census--How it Can Help You Help the Patron
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Attitudes and Values Associated With Information
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U.S. Population Characteristics: Implications for Libraries.
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National Commission on Libraries and Information Science Public Hearing; Chicago Regional Hearing (September 27, 1972): Other Testimony.
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Changes in the Staffing of UK Special Libraries and Information Services in the Decade 1972-81: A Review of the DES Census Data.
by: East, Harry
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if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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