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Sources
Source may refer to: Research * Historical document * Historical source * Source (intelligence) or sub source, typically a confidential provider of non open-source intelligence * Source (journalism), a person, publication, publishing institute or other record or document that gives information * Source document, a document in which data collected for a clinical trial is first recorded * Source text, in research (especially in the humanities), a source of information referred to by citation ** Primary source, a first-hand written evidence of history made at the time of the event by someone who was present ** Secondary source, a written account of history based upon the evidence from primary sources ** Tertiary source, a compilation based upon primary and secondary sources * Sources (website), a directory of expert contacts and media spokespersons * Open source, a philosophy of dissemination of intellectual products Law * Sources of international law, the materials and proc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sources (website)
Sources is a web portal for journalists, freelance writers, editors, authors and researchers, focusing especially on human sources: experts and spokespersons who are prepared to answer Reporters' questions or make themselves available for on-air interviews. Structure The Sources website is built around a controlled-vocabulary subject index comprising more than 20,000 topics. This subject index is underpinned by an 'Intelligent Search' system which helps reporters focus their searches by suggesting additional subjects related to their search terms. For example, a search for "cancer" will suggest terms such as "chemotherapy", "melanoma", "oncology", "radiation therapy", "tobacco diseases" and "tumours", as well as topics that actually contain the word "cancer". Each topic reference links in turn to experts and spokespersons on that topic, with profiles describing their expertise and, where relevant, their approach to the issue, along with their phone numbers and other contact inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Primary Source
In the study of history as an academic discipline, a primary source (also called an original source) is an Artifact (archaeology), artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time under study. It serves as an original source of information about the topic. Similar definitions can be used in library science and other areas of scholarship, although different fields have somewhat different definitions. In journalism, a primary source can be a person with direct knowledge of a situation, or a document written by such a person. Primary sources are distinguished from ''secondary sources'', which cite, comment on, or build upon primary sources. Generally, accounts written after the fact with the benefit of hindsight are secondary. A secondary source may also be a primary source depending on how it is used. For example, a memoir would be considered a primary source in research concerning its author or about ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Energy Sources
Energy development is the field of activities focused on obtaining sources of energy from Natural resource, natural resources. These activities include the production of Renewable energy, renewable, nuclear power, nuclear, and fossil fuel derived sources of energy, and for the Waste heat, recovery and reuse of energy that would otherwise be wasted. Energy conservation and Efficient energy use, efficiency measures reduce the demand for energy development, and can have benefits to society with improvements to environmental issues. Societies use energy for transportation, manufacturing, Lighting, illumination, heating and air conditioning, and communication, for industrial, commercial, agricultural and domestic purposes. Energy resources may be classified as primary resources, where the resource can be used in substantially its original form, or as secondary resources, where the energy source must be converted into a more conveniently usable form. Non-renewable resources are signif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Source (journalism)
In journalism, a source is a person, publication, or knowledge of other record or document that gives timely information. Outside journalism, sources are sometimes known as "news sources". Examples of sources include official records, publications or broadcasts, officials in government or business, organizations or corporations, witnesses of crime, accidents or other events, and people involved with or affected by a news event or issue. According to Shoemaker (1996) and McQuail (1994), there are a multitude of factors that tend to condition the acceptance of sources as bona fide by investigative journalists. Reporters are expected to develop and cultivate sources, especially if they regularly cover a specific topic, known as a " beat". Beat reporters must, however, be cautious of becoming too close to their sources. Reporters often, but not always, give greater leeway to sources with little experience. For example, sometimes a person will say they don't want to talk, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sources Of Law
Sources of law are the origins of laws, the binding rules that enable any state to govern its territory. The terminology was already used in Rome by Cicero as a metaphor referring to the "fountain" ("fons" in Latin) of law. Technically, anything that can create, change, or cancel any right or law is considered a source of law. The term "source of law" may sometimes refer to the sovereign or to the seat of power from which the law derives its validity. Legal theory usually classifies them into formal and material sources, although this classification is not always used consistently. Normally, formal sources are connected with what creates the law: statutes, case law, contracts, and so on. In contrast, material sources refer to the places where formal law can be found, such as the official bulletin or gazette where the legislator publishes the country's laws, newspapers, and public deeds. Following the Aristotelian notion of the four causes (material, formal, efficient, and final ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sources Of International Law
International law, also known as "law of nations", refers to the body of rules which regulate the conduct of sovereign states in their relations with one another. Sources of international law include treaties, international customs, general widely recognized principles of law, the decisions of national and lower courts, and scholarly writings. They are the materials and processes out of which the rules and principles regulating the international community are developed. They have been influenced by a range of political and legal theories. Modern views Article 38(1) of the Statute of the International Court of Justice is generally recognized as a definitive statement of the sources of international law. It requires the Court to apply, among other things, (a) international conventions, whether general or particular, establishing rules expressly recognized by the contesting states; (b) international custom, as evidence of a general practice accepted as law; (c) the general pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Source Text
A source text is a text (sometimes oral) from which information or ideas are derived. In translation, a source text is the original text that is to be translated into another language. More generally, source material or symbolic sources are objects meant to communicate information, either publicly or privately, to some person, known or unknown. Typical symbolic sources include written documents such as letters, notes, receipts, ledgers, manuscripts, reports, or public signage, or graphic art, etc. Symbolic sources exclude, for example, bits of broken pottery or scraps of food excavated from a middenand this regardless of how much information can be extracted from an ancient trash heap, or how little can be extracted from a written document. Classification in levels In historiography, distinctions are commonly made between three levels of source texts: primary, secondary, and tertiary. Primary Primary sources are firsthand written accounts made at the time of an event by som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secondary Source
In Scholarly method, scholarship, a secondary sourcePrimary, secondary and tertiary sources . University Libraries, University of Maryland.Secondary sources ". James Cook University. is a document or recording that relates or discusses information originally presented elsewhere. A secondary source contrasts with a primary source, ''primary'', or ''original'', source of the information being discussed. A primary source can be a person with direct knowledge of a situation or it may be a document created by such a person. A secondary source is one that gives information about a primary source. In a secondary source, the original information is selected, modified and arr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radioactive Source
A radioactive source is a known quantity of a radionuclide which emits ionizing radiation, typically one or more of the radiation types gamma rays, alpha particles, beta particles, and neutron radiation. Sources can be used for irradiation, where the radiation performs a significant ionising function on a target material, or as a radiation metrology source, which is used for the calibration of radiometric process and radiation protection instrumentation. They are also used for industrial process measurements, such as thickness gauging in the paper and steel industries. Sources can be sealed in a container (highly penetrating radiation) or deposited on a surface (weakly penetrating radiation), or they can be in a fluid. As an irradiation source they are used in medicine for radiation therapy and in industry for such as industrial radiography, food irradiation, sterilization (microbiology), sterilization, vermin disinfestation, and Cross-linked polyethylene, irradiation crosslinki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ion Source
An ion source is a device that creates atomic and molecular ions. Ion sources are used to form ions for mass spectrometers, optical emission spectrometers, particle accelerators, ion implanters and ion engines. Electron ionization Electron ionization is widely used in mass spectrometry, particularly for organic molecules. The gas phase reaction producing electron ionization is :M + e^- -> M^ + 2e^- where M is the atom or molecule being ionized, e^- is the electron, and M^ is the resulting ion. The electrons may be created by an arc discharge between a cathode and an anode. An electron beam ion source (EBIS) is used in atomic physics to produce highly charged ions by bombarding atoms with a powerful electron beam. Its principle of operation is shared by the electron beam ion trap. Electron capture ionization Electron capture ionization (ECI) is the ionization of a gas phase atom or molecule by attachment of an electron to create an ion of the form A−•. The r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historical Source
A historical source encompasses "every kind of evidence that human beings have left of their past activities — the written word and spoken word, the shape of the landscape and the material artefact, the fine arts as well as photography and film." While the range of potential historical sources has expanded to include many non-documentary sources, nevertheless "the study of history has nearly always been based squarely on what the historian can read in documents or hear from informants". Historical sources are usually divided into primary and secondary, though some historians also refer to tertiary sources. Types Primary source In the study of history as an academic discipline, a "primary source" (also called an "original source") is a first hand account of events by someone who lived through them. "Primary sources were made during the historical period that is being investigated." Secondary source In scholarship, a secondary source [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Current Source
A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it. A current source is the dual of a voltage source. The term ''current sink'' is sometimes used for sources fed from a negative voltage supply. Figure 1 shows the schematic symbol for an ideal current source driving a resistive load. There are two types. An ''independent current source'' (or sink) delivers a constant current. A ''dependent current source'' delivers a current which is proportional to some other voltage or current in the circuit. Background , - align="center" , style="padding: 1em 2em 0;", , style="padding: 1em 2em 0;", , - align="center" , Voltage source , Current source , - align="center" , style="padding: 1em 2em 0;", , style="padding: 1em 2em 0;", , - align="center" , Controlled voltage source , Controlled current source , - align="center" , style="padding: 1em 2em 0;", , style="padding: 1em 2em 0;", , - align=" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
