A primary source is an original document or other material that has not been changed in any way. It is a reliable first-hand account usually written at or near the time the event(s) occurred. Usually it was produced by someone with direct personal knowledge of the events that are described. It is used as an original source of information about the topic. Primary sources are distinguished from secondary sources. Secondary sources are documents based on primary sources. Thus, a memoir of a participant in an event is a primary source, whilst a history of that event based on several memoirs is a secondary source. Different kinds of work have slightly different definitions of a primary source. In journalism, for example, a primary source can also be a person.
Source
Source could mean:
Secondary source
A secondary source is a document or recording that writes or speaks about information that is one step removed from the original source.
The secondary source depends on the "primary source" or "original source" of the information. Secondary sources interpret, evaluate or discuss information found in primary sources. In historiography, a secondary source is a study written by a scholar about a topic. Secondary sources frequently cite primary sources and other secondary sources. They rarely cite tertiary sources.
A secondary source would be a book on 13th century politics, while the Magna Carta itself would be a primary source.
Many secondary sources use extensive citations in the form of footnotes or endnotes.
The main use of secondary sources in law is to explain the law. They also explain legal concepts. They are used to analyze and describe laws as well as comment on them. Judicial decisions and opinions by qualified experts are secondary sources.
Breinigerberg
Breinigerberg is a small village in the West of Germany, the state of North Rhine-Westphalia About 972 people live at the place. It is close to the "Naturpark Nordeifel", a large forest area in Germany, Belgium and the Netherlands.
The road L12 passes through Breinigerberg splitting it into two parts.
In the last two centuries, Breinigerberg was famous for mining. Even the ancient Romans dug for ore in the area. It was used for the production of brass in the city of Stolberg. Today there is no more mining but the remains are still present. Big holes in the Schlangenberg area prove what had been left from the past. Today the Schlangenberg is a natural reserve protecting rare flowers and insects.
Document
A document ("noun") is a piece of information that one can use for communicating something. In most of the cases it is a paper, that contains information in the form of ink marks. But nowadays documents can be digital as well.
To document ("verb") means to produce an object by collecting and representing information.
What most people understand, when they speak of a document one can see from the connotations and denotations that appear in a search for document. From these usages, one can infer the following typical connotations:
Technology to manage documents has developed with documents themselves. Of particular importances are practices concerning the preservation, archival, destruction and management of documents. These together are called the "document life cycle"
Object
Object could mean:
Computing
Popular culture
International Standard Book Number
The International Standard Book Number, ISBN, is a unique commercial book identifier barcode. The ISBN system was created in the United Kingdom, in 1966, by the booksellers and stationers W.H. Smith.
Originally, it was the 9-digit Standard Book Numbering (SBN) code and still was used in 1974; it was adopted as the international standard ISO 2108 in 1970. A similar, numeric identification, the International Standard Serial Number (ISSN), identifies periodical publications such as magazines. Since January 1, 2007, ISBNs are of 13 digits, like in Bookland EAN-13. The TC 46/SC 9 is responsible for the standard.
An ISBN is given to each edition and variation (except reprintings) of a book. The ISBN is 13 digits long if assigned after January 1, 2007, and 10 digits long if assigned before 2007. An International Standard Book Number consists of 4 or 5 parts:
The ISBN parts may be of different lengths, and usually are separated with hyphens or spaces.
The group identifier code (GIC) number is 0 or 1 for English-speaking countries; 2 for French-speaking countries; 3 for German-speaking countries; 4 for Japanese; 5 for Russian, et cetera. The original standard book number (SBN) had no group identifier, but affixing a zero (0) as prefix to a 9-digit SBN creates a valid 10-digit ISBN. The group identifier may be up to 5 digits long; e.g. 99936 is a group identifier for the country Bhutan.
The national ISBN agency assigns the publisher number (cf. the category: ISBN agencies); the publisher selects the item number. Generally, a book publisher is not required to assign an ISBN, nor for a book to display its number (except in China; see below), however, most book stores only handle ISBN bearing merchandise.
A listing of all the 628,000 assigned publisher codes is published, and can be ordered in book form, but, as of 2007, it costs US$300. The web site of the international ISBN agency does not offer any free method of looking up publisher codes.
Index
An index is a system used to make finding information easier.
Index could also mean:
In publications:
In computers and information retrieval:
Other:
Recording
Recording means to capture data to store it on a storage medium or record as a video format.
Historical records of events have been made for thousands of years. Amongst the earliest are cave painting, runic alphabets and ideograms. Technology continues to provide and expand means for human beings to record their thoughts, feelings and experiences.
Pedro Santana, Elías Piña
Pedro Santana is a municipality in the Dominican Republic, in the Elías Piña Province, on the border with Haiti, along the left side of the Artibonite river.
The town, and municipality, was named after "Pedro Santana", a general of the Independence wars and first president of the Dominican Republic. He was born in Hincha, now a Haitian city ("Hinche") near the the border.
The municipality had, in 2010, a total population of 3,917: 2,120 men and 1,797 women. The urban population was of the total population.
The old small town of "Los Cercadillos" was elevated, with the present name, to the category of municipal district of Bánica on 16 September 1942 and to the category of municipality by the Law 3208 of 3 March 1952.
Pedro Santana has an area of and is at to the north of Bánica and at to the north of Comendador.
The limits of the municipality are the Dajabón province to the northwest, the Santiago Rodríguez province to the northeast, the San Juan province to the east, the municipality of Bánica to the south and Haiti to the west.
The municipality of Pedro Santana has only one municipal district; this is:
The main economic activity of the municipality is farming.
Visual system
The visual system is the part of the nervous system which allows organisms to see.
It interprets the information from visible light to build a representation of the world surrounding the body. The visual system has the complex task of (re)constructing a three dimensional world from a two dimensional projection of that world. The psychological manifestation of visual information is known as visual perception.
This article mostly describes the visual system of mammals, although other "higher" animals have similar visual systems. In this case, the visual system consists of:
Different species are able to see different parts of the light spectrum; for example, bees can see into the ultraviolet, while pit vipers can accurately target prey with their infrared imaging sensors.
Microform