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PVT Collector - Schematic Cross Section
PVT may refer to: Medicine * Paraventricular nucleus of thalamus, a portion of the thalamus * Portal vein thrombosis, a liver disease involving blood clots * Psychomotor vigilance task, a sustained-attention, reaction-timed task that measures the speed with which subjects respond to a visual stimulus * Pulseless ventricular tachycardia, a type of ventricular tachycardia Science and engineering * PV/T or PV-T: photovoltaic thermal: photovoltaic thermal hybrid solar collector * Physical vapor transport, another term for physical vapor deposition * Polyvinyl toluene, an organic polymer * Process, voltage, and temperature: process corners in electrical engineering * Pressure, volume, and temperature: in an equation of state in physics and engineering * Position, velocity, and time: in navigation systems ** Especially in satellite navigation Business * Price and volume trend (price–volume trend): volume–price trend, a technical analysis indicator * Private limited company (Pvt Lt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photovoltaic Thermal Hybrid Solar Collector
Photovoltaic thermal collectors, typically abbreviated as PVT collectors and also known as hybrid solar collectors, photovoltaic thermal solar collectors, PV/T collectors or solar cogeneration systems, are power generation technologies that convert solar radiation into usable Thermal energy, thermal and Electricity, electrical energy. PVT collectors combine photovoltaic solar cells (often arranged in solar panels), which convert sunlight into electricity, with a solar thermal collector, which transfers the otherwise unused waste heat from the PV module to a heat transfer fluid. By combining electricity and heat generation within the same component, these technologies can reach a higher overall efficiency than solar photovoltaic (PV) or solar thermal (T) alone. Significant research has gone into developing a diverse range of PVT technologies since the 1970s. The different PVT collector technologies differ substantially in their collector design and heat transfer fluid and address di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thalamus
The thalamus (from Greek θάλαμος, "chamber") is a large mass of gray matter located in the dorsal part of the diencephalon (a division of the forebrain). Nerve fibers project out of the thalamus to the cerebral cortex in all directions, allowing hub-like exchanges of information. It has several functions, such as the relaying of sensory signals, including motor signals to the cerebral cortex and the regulation of consciousness, sleep, and alertness. Anatomically, it is a paramedian symmetrical structure of two halves (left and right), within the vertebrate brain, situated between the cerebral cortex and the midbrain. It forms during embryonic development as the main product of the diencephalon, as first recognized by the Swiss embryologist and anatomist Wilhelm His Sr. in 1893. Anatomy The thalamus is a paired structure of gray matter located in the forebrain which is superior to the midbrain, near the center of the brain, with nerve fibers projecting out to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volume–price Trend
Volume–price trend (VPT) (sometimes price–volume trend) is a technical analysis In finance, technical analysis is an analysis methodology for analysing and forecasting the direction of prices through the study of past market data, primarily price and volume. Behavioral economics and quantitative analysis use many of the sam ... indicator intended to relate price and volume in the stock market. VPT is based on a running cumulative volume that adds or subtracts a multiple of the percentage change in share price trend and current volume, depending upon the investment's upward or downward movements. Formula : \text = \text_\text + \text \times VPT total, i.e. the zero point, is arbitrary. Only the shape of the resulting indicator is used, not the actual level of the total. VPT is similar to on-balance volume (OBV), but where OBV takes volume just according to whether the close was higher or lower, VPT includes how much higher or lower it was. VPT is interpreted in similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Privacy
Privacy (, ) is the ability of an individual or group to seclude themselves or information about themselves, and thereby express themselves selectively. The domain of privacy partially overlaps with security, which can include the concepts of appropriate use and protection of information. Privacy may also take the form of bodily integrity. The right not to be subjected to unsanctioned invasions of privacy by the government, corporations, or individuals is part of many countries' privacy laws, and in some cases, constitutions. The concept of universal individual privacy is a modern concept primarily associated with Western culture, particularly British and North American, and remained virtually unknown in some cultures until recent times. Now, most cultures recognize the ability of individuals to withhold certain parts of personal information from wider society. With the rise of technology, the debate regarding privacy has shifted from a bodily sense to a digital sense. As the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quick Count
Quick count is a method for verification of election results by projecting them from a sample of the polling stations. The similar Parallel Vote Tabulation (PVT) is an election observation methodology that is typically based on a representative random sample of polling stations and is employed for independent verification (or challenge) of election results. A PVT involves observation of the administration of the election, the process of voting and of counting of ballots at the polling stations, collection of official polling station results and independent tabulation of these results, parallel to election authorities. Origin Organizers from the Philippine National Citizen Movement for Free Elections (NAMFREL) are widely recognized as the pioneers of the quick count, or parallel vote tabulation (PVT) for emerging democracies. During a 1986 Presidential election, NAMFREL attempted to mirror the official count of all 90,000 polling stations. They performed a remarkable task in collect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rogožarski PVT
The Rogožarski PVT ( sr-Cyrl, Рогожарски ПВТ; transliterated as Rogozarski PWT in German and as Rogojarsky PVT in some older English sources) was a single-engined, two-seat parasol winged aircraft designed as an advanced and fighter trainer in Yugoslavia before World War II. Over 60 were built, serving with the Yugoslav Royal Air Force (YAF) until the fall of Yugoslavia in 1941. After that, some PVTs were used by the newly formed Air Force of the Independent State of Croatia, sometimes as ground attack aircraft. Design and development The ''Prva Srpska Fabrika Aeroplana Živojin Rogožarski'' was the first Serbian aircraft manufacturer in Yugoslavia, founded in 1924. In about 1933 its team of Rudolf Fizir, Sima Milutinović, Kosta Sivčev and Adem Biščević designed the PVT, a training aircraft with tandem open cockpits in an oval wooden monocoque fuselage. Its wooden, canvas covered wings were swept and parasol mounted well above the fuselage with pairs of li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Private (rank)
A private is a soldier, usually with the lowest rank in many armies. Soldiers with the rank of Private may be conscripts or they may be professional (career) soldiers. The term derives from the medieval term "private soldiers" (a term still used in the British Army), contrasting mercenary soldiers and denoting individuals who were either exclusively hired, conscripted, or mustered into service by a feudal nobleman commanding a battle group of an army. Asia Indonesia In Indonesia, this rank is referred to as '' Tamtama'' (specifically ''Prajurit'' which means soldier), which is the lowest rank in the Indonesian National Armed Forces and special Police Force. In the Indonesian Army, Indonesian Marine Corps, and Indonesian Air Force, "Private" has three levels, which are: Private (''Prajurit Dua''), Private First Class (''Prajurit Satu''), and Master Private (''Prajurit Kepala''). After this rank, the next promotion is to Corporal. File:prada pdh ad.png, Private (''Prajurit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engineering Validation Test
An engineering verification test (EVT) is performed on first engineering prototypes, to ensure that the basic unit performs to design goals and specifications. Verification ensures that designs meets requirements and specification while validation ensures that created entity meets the user needs and objectives. Tests Tests may include: * Functional test (basic) * Power measurement * Signal quality test * Conformance test * Electromagnetic interference (EMI) pre-scan * Thermal and four-corner test * Basic parametric measurements, specification verification Importance Identifying design problems and solving them as early in the design cycle as possible is a key to keeping projects on time and within budget. Too often, product design and performance problems are not detected until late in the product development cycle, when the product is ready to be shipped. Prototyping In the prototyping stage, engineers create actual working samples of the product they plan to produce. Engineer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Private Limited Company
A private limited company is any type of business entity in "private" ownership used in many jurisdictions, in contrast to a publicly listed company, with some differences from country to country. Examples include the '' LLC'' in the United States, ''private company limited by shares'' in the United Kingdom, '' GmbH'' in Germany and Austria, ''société à responsabilité limitée'' in France, and ''sociedad de responsabilidad limitada'' in the Spanish-speaking world. The benefit of having a private limited company is that there is limited liability. However, shares can only be sold to shareholders in the business, which means that it can be difficult to liquidate such a company. Abbreviations Albania In Albania a limited liability company ( sq, Shoqëri me përgjegjësi të kufizuar Sh.p.k) is a commercial company founded by persons of physical or judicial status, who are not liable for the company and personally bear losses only up to the outstanding contribution agreeme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navigation System
A navigation system is a computing system that aids in navigation. Navigation systems may be entirely on board the vehicle or vessel that the system is controlling (for example, on the ship's bridge) or located elsewhere, making use of radio or other signal transmission to control the vehicle or vessel. In some cases, a combination of these methods is used. Navigation systems may be capable of one or more of: * containing maps, which may be displayed in human-readable format via text or in a graphical format * determining a vehicle or vessel's location via sensors, maps, or information from external sources * providing suggested directions to a human in charge of a vehicle or vessel via text or speech * providing directions directly to an autonomous vehicle such as a robotic probe or guided missile * providing information on nearby vehicles or vessels, or other hazards or obstacles * providing information on traffic conditions and suggesting alternative directions * simultaneous l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Navigation
A satellite navigation or satnav system is a system that uses satellites to provide autonomous geo-spatial positioning. It allows satellite navigation devices to determine their location (longitude, latitude, and altitude/elevation) to high precision (within a few centimetres to metres) using time signals transmitted along a line of sight by radio from satellites. The system can be used for providing position, navigation or for tracking the position of something fitted with a receiver (satellite tracking). The signals also allow the electronic receiver to calculate the current local time to a high precision, which allows time synchronisation. These uses are collectively known as Positioning, Navigation and Timing (PNT). One set of critical vulnerabilities in satellite communications are the signals that govern positioning, navigation and timing (PNT). Failure to properly secure these transmissions could not only disrupt satellite networks but wreak havoc on a host of dependent s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portal Vein Thrombosis
Portal vein thrombosis (PVT) is a vascular disease of the liver that occurs when a blood clot occurs in the hepatic portal vein, which can lead to increased pressure in the portal vein system and reduced blood supply to the liver. The mortality rate is approximately 1 in 10. An equivalent clot in the vasculature that exits the liver carrying deoxygenated blood to the right atrium via the inferior vena cava, is known as hepatic vein thrombosis or Budd-Chiari syndrome. Signs and symptoms Portal vein thrombosis causes upper abdominal pain, possibly accompanied by nausea and an enlarged liver and/or spleen; the abdomen may be filled with fluid (ascites). A persistent fever may result from the generalized inflammation. While abdominal pain may come and go if the thrombus forms suddenly, long-standing clot build-up can also develop without causing symptoms, leading to portal hypertension before it is diagnosed. Other symptoms can develop based on the cause. For example, if portal v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
