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Aging (other)
Aging is the effect of time on a person. Aging or ageing may also refer to: Biology * Senescence, the biological effect of time on an organism ** Aging in cats ** Aging in dogs Demography * Population ageing, a shift in the distribution of a population towards older ages Chemistry and materials science * Polymer degradation, a change of polymer properties due to environmental factors * Precipitation hardening, a heat treatment of materials * Ostwald ripening, precipitate or deposit aging in chemistry * Ageing (textiles), after treatment of textiles Food preparation * Aging (food), the leaving of a product to improve its flavor ** Aging of wine, the effect of time on wine ** Barrel aging, a method of maturing wine, spirits, etc. ** Beef aging, a process of preparing beef for consumption ** Cheese ripening, a process in cheesemaking Computers * Aging (file system), a tendency towards data fragmentation in file systems * Aging (scheduling), an operating system technique for resou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aging
Ageing ( BE) or aging ( AE) is the process of becoming older. The term refers mainly to humans, many other animals, and fungi, whereas for example, bacteria, perennial plants and some simple animals are potentially biologically immortal. In a broader sense, ageing can refer to single cells within an organism which have ceased dividing, or to the population of a species. In humans, ageing represents the accumulation of changes in a human being over time and can encompass physical, psychological, and social changes. Reaction time, for example, may slow with age, while memories and general knowledge typically increase. Ageing increases the risk of human diseases such as cancer, Alzheimer's disease, diabetes, cardiovascular disease, stroke and many more. Of the roughly 150,000 people who die each day across the globe, about two-thirds die from age-related causes. Current ageing theories are assigned to the damage concept, whereby the accumulation of damage (such as DNA ox ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aging Of Wine
The aging of wine is potentially able to improve the quality of wine. This distinguishes wine from most other consumable goods. While wine is perishable and capable of deteriorating, complex chemical reactions involving a wine's sugars, acids and phenolic compounds (such as tannins) can alter the aroma, color, mouthfeel and taste of the wine in a way that may be more pleasing to the taster. The ability of a wine to age is influenced by many factors including grape variety, vintage, viticultural practices, wine region and winemaking style. The condition that the wine is kept in after bottling can also influence how well a wine ages and may require significant time and financial investment.R. Jackson ''"Wine Science: Principles and Applications"'' Third Edition, pp. 431–489, 643–671. Academic Press 2008 .R. Boulton, V. Singleton, L. Bisson, R. Kunkee ''Principles and Practices of Winemaking'', pp. 382–424. Springer 1996 New York . The quality of an aged wine varies significant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aging (artwork)
Aging is a process by which an artwork, typically a painting or sculpture, is made to appear old. It is meant to emulate the natural deterioration that can occur over many decades or centuries. Although there may be "innocent" reasons for it, ageing is a technique very often used in art forgery. Paintings deteriorate over time because they are created using essentially incompatible materials, with each having a different reaction to the changes in the environment, including light, temperature and relative humidity. An oil painting consists of several layers, comprising the base canvas, a layer of gesso base coat, several layers of the oil-based paint and then several coats of varnish to protect the paint surface. With many different materials, it is understandable that each layer may dry at different rates and will also absorb and release moisture at different rates. When this occurs, expansion and contraction of the painting will result in a crazing of the varnish surface. Thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Aging
In software engineering, software aging is the tendency for software to fail or cause a system failure after running continuously for a certain time, or because of ongoing changes in systems surrounding the software. Software aging has several causes, including the inability of old software to adapt to changing needs or changing technology platforms, and the tendency of software patches to introduce further errors. As the software gets older it becomes less well-suited to its purpose and will eventually stop functioning as it should. Rebooting or reinstalling the software can act as a short-term fix. A proactive fault management method to deal with the software aging incident is software rejuvenation. This method can be classified as an environment diversity technique that usually is implemented through software rejuvenation agents (SRA). The phenomenon was first identified by David Parnas, in an essay that explored what to do about it:"Programs, like people, get old. We can't ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aging (scheduling)
In computer science for Operating systems, aging (US English) or ageing is a scheduling technique used to avoid starvation. Fixed priority scheduling is a scheduling discipline, in which tasks queued for utilizing a system resource are assigned a priority each. A task with a high priority is allowed to access a specific system resource before a task with a lower priority is allowed to do the same. A disadvantage of this approach is that tasks assigned with a lower priority may be starved when a large number of high priority tasks are queued. Aging is used to gradually increase the priority of a task, based on its waiting time in the ready queue. Problem In priority-based scheduling algorithms, a major problem is indefinite block, or starvation. A process that is ready to run but waiting for the CPU can be considered blocked. A priority scheduling algorithm can leave some low-priority processes waiting indefinitely. A steady stream of higher-priority processes can prevent a low-p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aging (file System)
In computing, file system fragmentation, sometimes called file system aging, is the tendency of a file system to lay out the contents of files non-continuously to allow in-place modification of their contents. It is a special case of data fragmentation. File system fragmentation negatively impacts seek time in spinning storage media, which is known to hinder throughput. Fragmentation can be remedied by re-organizing files and free space back into contiguous areas, a process called defragmentation. Solid-state drives do not physically seek, so their non-sequential data access is hundreds of times faster than moving drives', making fragmentation a non-issue. It is recommended to not defragment solid-state storage, because this can prematurely wear drives via unnecessary write–erase operations. Causes When a file system is first initialized on a partition, it contains only a few small internal structures and is otherwise one contiguous block of empty space. This means that the fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheese Ripening
Cheese ripening, alternatively cheese maturation or affinage, is a process in cheesemaking. It is responsible for the distinct flavour of cheese, and through the modification of "''ripening agents''", determines the features that define many different varieties of cheeses, such as taste, texture, and body. The process is "characterized by a series of complex physical, chemical and microbiological changes" that incorporates the agents of "bacteria and enzymes of the milk, lactic culture, rennet, lipases, added moulds or yeasts, and environmental contaminants". The majority of cheese is ripened, except for fresh cheese. History Cheese ripening was not always the highly industrialised process it is today; in the past, cellars and caves were used to ripen cheeses instead of the current highly regulated process involving machinery and biochemistry. Some cheeses still are made using more historical methods, such as the blue cheese Roquefort, which is required to be ripened in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beef Aging
Beef aging (American English) or ageing is a process of preparing beef for consumption by aging it, in order to break down the connective tissue within the meat. Dry-aged beef Dry-aged beef is beef that has been hung or placed on a rack to dry for several weeks. After the animal is slaughtered and cleaned, it is hung as a full or half carcass. Primal (large distinct sections) or sub primal cuts, such as strip loins, rib eyes, and sirloin, are placed in a refrigerator unit, also known as a "hot box". This process involves considerable expense, as the beef must be stored near freezing temperatures. Subprimal cuts can be dry aged on racks either in specially climate-controlled coolers or within a moisture-permeable drybag. Moreover, only the higher grades of meat can be dry aged, as the process requires meat with a large, evenly distributed fat content. Because of this, dry-aged beef is seldom available outside of steak restaurants and upscale butcher shops or groceries. The key ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barrel Aging
A barrel or cask is a hollow cylindrical container with a bulging center, longer than it is wide. They are traditionally made of wooden staves and bound by wooden or metal hoops. The word vat is often used for large containers for liquids, usually alcoholic beverages; a small barrel or cask is known as a keg. Modern wooden barrels for wine-making are made of French common oak (''Quercus robur''), white oak (''Quercus petraea''), American white oak (''Quercus alba''), more exotic is Mizunara Oak all typically have standard sizes: Recently Oregon Oak (Quercus Garryana) has been used. *"Bordeaux type" , *"Burgundy type" and *"Cognac type" . Modern barrels and casks can also be made of aluminum, stainless steel, and different types of plastic, such as HDPE. Someone who makes barrels is called a "barrel maker" or cooper (coopers also make buckets, vats, tubs, butter churns, hogsheads, firkins, kegs, kilderkins, tierces, rundlets, puncheons, pipes, tuns, butts, pins, tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aging (food)
Aging (American English) or ageing (British English), in the context of food or beverages, is the leaving of a Product (business), product over an extended period of time (often months or years) to aid in improving the Flavoring, flavor of the product. Aging can be done under a number of conditions, and for a number of reasons including stronger umami flavors and tenderness. Drying Food drying, Drying of foods by leaving them in a low-humidity environment has been used as a food preservation technique for millennia. Air-dried meat such as jerky may have been some of the first preserved foods ever eaten by man. Drying also concentrates flavors in foods by removing water from them. Fermentation Foods may be aged to allow fermentation to occur, such as in the making of alcoholic beverages, in cheesemaking, in pickling, such as kimchi, and in meat or fish products such as fermented sausage or surströmming. Culturing Besides fermentation, microbial food cultures can act on fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Senescence
Senescence () or biological aging is the gradual deterioration of functional characteristics in living organisms. The word ''senescence'' can refer to either cellular senescence or to senescence of the whole organism. Organismal senescence involves an increase in death rates and/or a decrease in fecundity with increasing age, at least in the latter part of an organism's life cycle. Senescence is the inevitable fate of almost all multicellular organisms with germ-soma separation, but it can be delayed. The discovery, in 1934, that calorie restriction can extend lifespan by 50% in rats, and the existence of species having negligible senescence and potentially immortal organisms such as '' Hydra'', have motivated research into delaying senescence and thus age-related diseases. Rare human mutations can cause accelerated aging diseases. Environmental factors may affect aging – for example, overexposure to ultraviolet radiation accelerates skin aging. Different parts of the body ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ageing (textiles)
Ageing (Stoving, Hanging, or Aging) is a kind of after treatment process for certain printed textile materials in which the goods are exposed to warm and moist atmosphere. Steaming is an evolved way to obtain the intended results. The objectives of the ageing process include the developing and fixing of the mordants and colors. The process is carried out using a variety of machines, including "loop agers." Fabric hangs and runs over guide rollers as it is exposed to steam at a certain temperature and for a specific amount of time. History Initially, colours were fixed through the action of sunlight, air, and dew, which evolved into ageing rooms and, more recently, rapid-aging systems (in the form of steam-cabinets). Stoving was the early name used to describe the process of ageing in wooden or brick chambers heated by a furnace beneath. In stoving, temperature or heating was the consideration, while it ignored moisture application. When block printed material (one of the ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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