http://www.infotoday.com/searcher/jan02/block.htm

I often suggested to students that information is a lot like pizza — the hungrier you are, the more you eat. The more thorough your search needs to be, the more you need to search through all the available resources. This is my guess about what formats of information occupy what percentage of the total of information cumulated over the past 3 centuries. I believe documents produced by local, national and international governments over the centuries are the largest single source of information, followed by books and periodicals. Even with well over a billion pages, and adding sites at the rate of millions a day, the Internet still has a lot of catching up to do before it can compete. The remaining small segments include things like dissertations, conference papers, videos, movies, photographs, maps, databases, etc.

Each individual piece of the information pizza can be sliced even thinner. Even a tiny slice like magazines or journals can be subdivided into all the different databases that index or abstract them — Medline, ERIC, Biological Abstracts, Agricola. If you really want a thorough search, you need to check every likely itty-bitty slice.

These are the original rules of information, pretty much as I scrawled them and copied them off. They've grown a bit since then.

1. Go where it is.

2. The answer you get depends on the question you ask.

3. Research is a multi-stage process.

4. Ask a librarian

My Rules of Information的更多相关文章

  1. The Brain vs Deep Learning Part I: Computational Complexity — Or Why the Singularity Is Nowhere Near

    The Brain vs Deep Learning Part I: Computational Complexity — Or Why the Singularity Is Nowhere Near ...

  2. SAX - DefaultHandler

    org.xml.sax.helpers.DefaultHandler 实现了 org.xml.sax.EntityResolver.org.xml.sax.DTDHandler.org.xml.sax ...

  3. Data Types

    原地址: Home / Database / Oracle Database Online Documentation 11g Release 2 (11.2) / Database Administ ...

  4. Transact-SQL 数据类型转换

    Syntax   Syntax for CAST: CAST ( expression AS data_type [ ( length ) ] )     Syntax for CONVERT: CO ...

  5. [转]Using the Interop Activity in a .NET Framework 4 Workflow

    本文转自:http://msdn.microsoft.com/en-us/library/ee264174(v=vs.100).aspx This topic applies to Windows W ...

  6. modSecurity规则学习(三)——SecRule

    通用格式 SecRule VARIABLES OPERATOR [TRANSFORMATION_FUNCTIONS, ACTIONS]   阶段phase (1)request headers (2) ...

  7. Access control differentiation in trusted computer system

    A trusted computer system that offers Linux® compatibility and supports contemporary hardware speeds ...

  8. Implement Property Value Validation in Code 在代码中实现属性值验证(XPO)

    This lesson explains how to set rules for business classes and their properties. These rules are val ...

  9. XAF-在代码中实现属性值验证(EF)

    This lesson explains how to set rules for business classes and their properties. These rules are val ...

随机推荐

  1. 求最长回文子串——Manacher算法

    回文串包括奇数长的和偶数长的,一般求的时候都要分情况讨论,这个算法做了个简单的处理把奇偶情况统一了.算法的基本思路是这样的,把原串每个字符中间用一个串中没出现过的字符分隔开来(统一奇偶),用一个数组p ...

  2. 【SQL Server】系统学习之二:索引优化

    页大小8192个字节,行限制为8060字节(大型对象除外). 包含varchar nvarchar varbinary sql_variant(8012,object类型) clr 的行,如果行大小超 ...

  3. 【SQL Server】系统学习之一:表表达式

    本节讨论的相关内容包括:视图.派生表.CTE.内联表值函数 场景:如果要查询一组数据(例如聚合数据,也就是几个表聚合在一起的数据),这些数据并未在数据库中以表的形式存在. 1.视图:通常用来分解大型的 ...

  4. smartgit document merge

    'Normal' Merge In case of a normal merge, a merge commit with at least two parent commits (i.e., the ...

  5. Java爬虫搜索原理实现

    permike 原文 Java爬虫搜索原理实现 没事做,又研究了一下爬虫搜索,两三天时间总算是把原理闹的差不多了,基本实现了爬虫搜索的原理,本次实现还是俩程序,分别是按广度优先和深度优先完成的,广度优 ...

  6. C#(二维数组/集合)

    一.二维数组int [,] array = new int[5,3];//有五个一维数组,每一个一维数组有3个元素 /打印出来一个“王”这个字string[,] wang = new string[, ...

  7. IceGrid负载均衡部署 z

    [IceGrid负载均衡部署步骤]1.环境主机1:IP=192.168.0.239,上面部署注册表服务器registry和节点node1,registry和node1运行在同一进程中:主机2:IP=1 ...

  8. ios模拟器未能安装此应用程序

    网上介绍了很多方法,觉得有些不太靠谱.这里只解释我试验过的最简单最粗暴的方法: 删除模拟器上旧的APP 以外,也可以做 CLEAN (cmd+shift+K) 把旧的build 删掉.

  9. Java线程新特性--- Lock

    在Java5中,专门提供了锁对象,利用锁可以方便的实现资源的封锁,用来控制对竞争资源并发访问的控制,这些内容主要集中在java.util.concurrent.locks包下面,里面有三个重要的接口C ...

  10. jquery判断自己是父节点的第几个子节点

    <div> <span>内容</span> <span>内容</span> <span>内容</span> < ...