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The Hyperspace Analogue to Language (HAL) model considers context only as the words that immediately surround a given word. HAL computes an NxN matrix, where N is the number of words in its lexicon, using a 10-word reading frame that moves incrementally through a corpus of text. Like SAM, any time two words are simultaneously in the frame, the association between them is increased, that is, the corresponding cell in the NxN matrix is incremented. The bigger the distance between the two words, the smaller the amount by which the association is incremented (specifically, Δ = 11 − d {\displaystyle \Delta =11-d} , where d {\displaystyle d} is the distance between the two words in the frame).
https://en.wikipedia.org/wiki/Semantic_memory
The cognitive neuroscience of semantic memory is a controversial issue with two dominant views. Many researchers and clinicians believe that semantic memory is stored by the same brain systems involved in episodic memory, that is, the medial temporal lobes, including the hippocampal formation. In this system, the hippocampal formation "encodes" memories, or makes it possible for memories to form at all, and the neocortex stores memories after the initial encoding process is completed.
https://en.wikipedia.org/wiki/Semantic_memory
Recently, new evidence has been presented in support of a more precise interpretation of this hypothesis. The hippocampal formation includes, among other structures: the hippocampus itself, the entorhinal cortex, and the perirhinal cortex. These latter two make up the parahippocampal cortices. Amnesiacs with damage to the hippocampus but some spared parahippocampal cortex were able to demonstrate some degree of intact semantic memory despite a total loss of episodic memory, which strongly suggests that information encoding leading to semantic memory does not have its physiological basis in the hippocampus.Other researchers believe the hippocampus is only involved in episodic memory and spatial cognition, which raises the question of where semantic memory may be located. Some believe semantic memory lives in the temporal cortex, while others believe that it is widely distributed across all brain areas.
https://en.wikipedia.org/wiki/Semantic_memory
The hippocampal areas associate semantic memory with declarative memory. The left inferior prefrontal cortex and the left posterior temporal areas are other areas involved in semantic memory use. Temporal lobe damage affecting the lateral and medial cortexes have been related to semantic impairments. Damage to different areas of the brain affect semantic memory differently.Neuroimaging evidence suggests that left hippocampal areas show an increase in activity during semantic memory tasks.
https://en.wikipedia.org/wiki/Semantic_memory
During semantic retrieval, two regions in the right middle frontal gyrus and the area of the right inferior temporal gyrus similarly show an increase in activity. Damage to areas involved in semantic memory result in various deficits, depending on the area and type of damage. For instance, Lambon Ralph, Lowe, & Rogers (2007) found that category-specific impairments can occur where patients have different knowledge deficits for one semantic category over another, depending on location and type of damage.
https://en.wikipedia.org/wiki/Semantic_memory
Category-specific impairments might indicate that knowledge may rely differentially upon sensory and motor properties encoded in separate areas (Farah and McClelland, 1991).Category-specific impairments can involve cortical regions where living and nonliving things are represented and where feature and conceptual relationships are represented. Depending on the damage to the semantic system, one type might be favored over the other. In many cases, there is a point where one domain is better than the other (such as the representation of living and nonliving things over feature and conceptual relationships or vice versa).Different diseases and disorders can affect the biological workings of semantic memory.
https://en.wikipedia.org/wiki/Semantic_memory
A variety of studies have been done in an attempt to determine the effects on varying aspects of semantic memory. For example, Lambon, Lowe, & Rogers studied the different effects semantic dementia and herpes simplex virus encephalitis have on semantic memory. They found that semantic dementia has a more generalized semantic impairment.
https://en.wikipedia.org/wiki/Semantic_memory
Additionally, deficits in semantic memory as a result of herpes simplex virus encephalitis tend to have more category-specific impairments. Other disorders that affect semantic memory, such as Alzheimer's disease, has been observed clinically as errors in naming, recognizing, or describing objects. Whereas researchers have attributed such impairment to degradation of semantic knowledge.Various neural imaging and research points to semantic memory and episodic memory resulting from distinct areas in the brain. Other research suggests that both semantic memory and episodic memory are part of a singular declarative memory system, yet represent different sectors and parts within the greater whole. Different areas within the brain are activated depending on whether semantic or episodic memory is accessed.
https://en.wikipedia.org/wiki/Semantic_memory
Category-specific semantic impairments are a neuropsychological occurrence in which an individual ability to identify certain categories of objects is selectively impaired while other categories remain undamaged. This condition can result in brain damage that is widespread, patchy, or localized. Research suggests that the temporal lobe, more specifically the structural description system, might be responsible for category specific impairments of semantic memory disorders.Theories on category-specific semantic deficits tend to fall into two different groups based on their underlying principles.
https://en.wikipedia.org/wiki/Semantic_memory
Theories based on the correlated structure principle, which states that conceptual knowledge organization in the brain is a reflection of how often an object's properties occur, assume that the brain reflects the statistical relation of object properties and how they relate to each other. Theories based on the neural structure principle, which states that the conceptual knowledge organization in the brain is controlled by representational limits imposed by the brain itself, assume that organization is internal. These theories assume that natural selective pressures have caused neural circuits specific to certain domains to be formed, and that these are dedicated to problem-solving and survival. Animals, plants, and tools are all examples of specific circuits that would be formed based on this theory.
https://en.wikipedia.org/wiki/Semantic_memory
Category-specific semantic deficits tend to fall into two different categories, each of which can be spared or emphasized depending on the individual's specific deficit. The first category consists of animate objects with, animals being the most common deficit. The second category consists of inanimate objects with two subcategories: fruits and vegetables (biological inanimate objects), and artifacts being the most common deficits. The type of deficit does not indicate a lack of conceptual knowledge associated with that category, as the visual system used to identify and describe the structure of objects functions independently of an individual's conceptual knowledge base.Most of the time, these two categories are consistent with case-study data.
https://en.wikipedia.org/wiki/Semantic_memory
However, there are a few exceptions to the rule. Categories like food, body parts, and musical instruments have been shown to defy the animate/inanimate or biological/non-biological categorical division. In some cases, it has been shown that musical instruments tend to be impaired in patients with damage to the living things category despite the fact that musical instruments fall in the non-biological/inanimate category.
https://en.wikipedia.org/wiki/Semantic_memory
However, there are also cases of biological impairment where musical instrument performance is at a normal level. Similarly, food has been shown to be impaired in those with biological category impairments. The category of food specifically can present some irregularities though because it can be natural, but it can also be highly processed, such as in a case study of an individual who had impairments for vegetables and animals, while their category for food remained intact.
https://en.wikipedia.org/wiki/Semantic_memory
Modality refers to a semantic category of meaning that has to do with necessity and probability expressed through language. In linguistics, certain expressions are said to have modal meanings. A few examples of this include conditionals, auxiliary verbs, adverbs, and nouns. When looking at category-specific semantic deficits, there is another kind of modality that looks at word relationships which is much more relevant to these disorders and impairments.For category-specific impairments, there are modality-specific theories that are based on a few general predictions.
https://en.wikipedia.org/wiki/Semantic_memory
These theories state that damage to the visual modality will result in a deficit of biological objects, while damage to the functional modality will result in a deficit of non-biological objects (artifacts). Modality-based theories assume that if there is damage to modality-specific knowledge, then all the categories that fall under it will be damaged. In this case, damage to the visual modality would result in a deficit for all biological objects with no deficits restricted to the more specific categories. For example, there would be no category specific semantic deficits for just "animals" or just "fruits and vegetables".
https://en.wikipedia.org/wiki/Semantic_memory
Semantic dementia is a semantic memory disorder that causes patients to lose the ability to match words or images to their meanings. It is fairly rare for patients with semantic dementia to develop category specific impairments, though there have been documented cases of it occurring. Typically, a more generalized semantic impairment results from dimmed semantic representations in the brain.Alzheimer's disease is a subcategory of semantic dementia which can cause similar symptoms. The main difference between the two is that Alzheimer's is categorized by atrophy to both sides of the brain, while semantic dementia is categorized by loss of brain tissue in the front portion of the left temporal lobe.
https://en.wikipedia.org/wiki/Semantic_memory
With Alzheimer's disease in particular, interactions with semantic memory produce different patterns in deficits between patients and categories over time which is caused by distorted representations in the brain. For example, in the initial onset of Alzheimer's disease, patients have mild difficulty with the artifacts category. As the disease progresses, the category specific semantic deficits progress as well, and patients see a more concrete deficit with natural categories. In other words, the deficit tends to be worse with living things as opposed to non-living things.
https://en.wikipedia.org/wiki/Semantic_memory
Herpes simplex virus encephalitis (HSVE) is a neurological disorder which causes inflammation of the brain. Early symptoms include headache, fever, and drowsiness, but over time symptoms including diminished ability to speak, memory loss, and aphasia develop. HSVE can also cause category-specific semantic deficits to occur. When this happens, patients typically have damage temporal lobe damage that affects the medial and lateral cortex as well as the frontal lobe. Studies have also shown that patients with HSVE have a much higher incidence of category-specific semantic deficits than those with semantic dementia, though both cause a disruption of flow through the temporal lobe.
https://en.wikipedia.org/wiki/Semantic_memory
A brain lesion refers to any abnormal tissue in or on the brain, most often caused by a trauma or infection. In one case study, a patient underwent surgery to remove an aneurysm, and the surgeon had to clip the anterior communicating artery which resulted in basal forebrain and fornix lesions. Before surgery, this patient was completely independent and had no semantic memory issues. However, after the operation and the lesions developed, the patient reported difficulty with naming and identifying objects, recognition tasks, and comprehension.
https://en.wikipedia.org/wiki/Semantic_memory
The patient had a much more significant amount of trouble with objects in the living category which could be seen in the drawings of animals which the patient was asked to do and in the data from the matching and identification tasks. Every lesion is different, but in this case study researchers suggested that the semantic deficits presented themselves as a result of disconnection of the temporal lobe. The findings led to the conclusion that any type of lesion in the temporal lobe, depending on severity and location, has the potential to cause semantic deficits.
https://en.wikipedia.org/wiki/Semantic_memory
The following table summarizes conclusions from the Journal of Clinical and Experimental Neuropsychology. These results give a baseline for the differences in semantic knowledge across gender for healthy subjects. Experimental data observes that males with category-specific semantic deficits are mainly impaired with fruits and vegetables while women with category specific semantic deficits are mainly impaired with animals and artifacts. It has been concluded that there are significant gender differences when it comes to category-specific semantic deficits, and that the patient will tend to be impaired in categories that had less existing knowledge to begin with.
https://en.wikipedia.org/wiki/Semantic_memory
Semantic memory is also discussed in reference to modality. Different components represent information from different sensorimotor channels. Modality specific impairments are divided into separate subsystems on the basis of input modality. Examples of different input modalities include visual, auditory, and tactile input. Modality-specific impairments are also divided into subsystems based on the type of information. Visual vs. verbal and perceptual vs. functional information are examples of information types.
https://en.wikipedia.org/wiki/Semantic_memory
Semantic memory disorders fall into two groups. Semantic refractory access disorders are contrasted with semantic storage disorders according to four factors: temporal factors, response consistency, frequency, and semantic relatedness. A key feature of semantic refractory access disorders is temporal distortions, where decreases in response time to certain stimuli are noted when compared to natural response times. In access disorders there are inconsistencies in comprehending and responding to stimuli that have been presented many times.
https://en.wikipedia.org/wiki/Semantic_memory
Temporal factors impact response consistency. In storage disorders, an inconsistent response to specific items is not observed.
https://en.wikipedia.org/wiki/Semantic_memory
Stimulus frequency determines performance at all stages of cognition. Extreme word frequency effects are common in semantic storage disorders while in semantic refractory access disorders word frequency effects are minimal. The comparison of close and distant groups tests semantic relatedness.
https://en.wikipedia.org/wiki/Semantic_memory
Close groupings have words that are related because they are drawn from the same category, such as a list of clothing types. Distant groupings contain words with broad categorical differences, such as unrelated words. Comparing close and distant groups shows that in access disorders semantic relatedness had a negative effect, which is not observed in semantic storage disorders. Category-specific and modality-specific impairments are important components in access and storage disorders of semantic memory.
https://en.wikipedia.org/wiki/Semantic_memory
Positron emission tomography (PET) and functional magnetic resonance imaging (fMRI) allow cognitive neuroscientists to explore different hypotheses concerning the neural network organization of semantic memory. By using these neuroimaging techniques researchers can observe the brain activity of participants while they perform cognitive tasks. These tasks can include, but are not limited to, naming objects, deciding if two stimuli belong in the same object category, or matching pictures to their written or spoken names.A developing theory is that semantic memory, like perception, can be subdivided into types of visual information—color, size, form, and motion. Thompson-Schill (2003) found that the left or bilateral ventral temporal cortex appears to be involved in retrieval of knowledge of color and form, the left lateral temporal cortex in knowledge of motion, and the parietal cortex in knowledge of size.Neuroimaging studies suggest a large, distributed network of semantic representations that are organized minimally by attribute, and perhaps additionally by category. These networks include "extensive regions of ventral (form and color knowledge) and lateral (motion knowledge) temporal cortex, parietal cortex (size knowledge), and premotor cortex (manipulation knowledge). Other areas, such as more anterior regions of temporal cortex, may be involved in the representation of nonperceptual (e.g. verbal) conceptual knowledge, perhaps in some categorically-organized fashion."
https://en.wikipedia.org/wiki/Semantic_memory
Charles D. Laughlin, Jr. (born 1938) is a neuroanthropologist known primarily for having co-founded a school of neuroanthropological theory called "biogenetic structuralism." Laughlin is an emeritus professor of anthropology and religion at Carleton University in Ottawa, Canada.
https://en.wikipedia.org/wiki/Biogenetic_structuralism
Following service in the American air force, Laughlin completed his undergraduate work in anthropology with a concentration in philosophy at San Francisco State University. He then did graduate work in anthropology at the University of Oregon, beginning in 1966. His doctoral dissertation was based on fieldwork conducted among a small tribe in northeast Uganda called the So (aka Tepeth, Tepes; see Laughlin and Allgeier 1979).
https://en.wikipedia.org/wiki/Biogenetic_structuralism
Laughlin's choice of the So was influenced by conversations he had with Colin Turnbull, who had worked with nearby peoples. Laughlin completed his dissertation, Economics and Social Organization among the So of Northeastern Uganda, and received his Ph.D. in 1972 while he was assistant professor of anthropology at the State University of New York at Oswego. He continued his studies during a postdoctoral fellowship at the Institute of Neurological Sciences at the University of Pennsylvania.
https://en.wikipedia.org/wiki/Biogenetic_structuralism
While teaching at Oswego, Laughlin pursued his interest in the neurobiological bases of human sociality, which led to his developing, in collaboration with Eugene G. d'Aquili of the University of Pennsylvania, the theory of biogenetic structuralism—a perspective that sought to merge the structuralism of Claude Lévi-Strauss with neuroscience. Laughlin and his colleagues, first at SUNY Oswego and later at Carleton University, continued to develop biogenetic structuralism and applied it to gain insight into a wide range of human social phenomena, including ritual, myth, science, consciousness, and transpersonal experience (see Laughlin 1991). While the perspective itself is not yet used by most anthropologists, it has sparked a number of debates inside symbolic anthropology and has influenced a number of researchers (e.g., Winkelman 2000, Dissanayake 1988, Victor Turner 1983). He is also one of the founders of a discipline known as transpersonal anthropology, concerned with the relationship between culture and altered states of consciousness.
https://en.wikipedia.org/wiki/Biogenetic_structuralism
His interest in this field stemmed from his own personal experiences after being exposed to meditation in various disciplines and years as a monk within the Sakya tradition of Tibetan Buddhism. While a student at Oregon, a professor advised him to study Zen Buddhism.
https://en.wikipedia.org/wiki/Biogenetic_structuralism
In the 1990s, he studied the state of consciousness known by the Navajo as "hózhó", and compared this with Buddhist altered states of consciousness, such as satori or kensho. He has published widely in journals on religious systems and transpersonal studies. Laughlin has written a comprehensive study of the anthropology of dreaming.
https://en.wikipedia.org/wiki/Biogenetic_structuralism
Neurognosis is a technical term used in biogenetic structuralism to refer to the initial organization of the experiencing and cognizing brain.All neurophysiological models comprising an individual’s cognized environment develop from these nascent models which exist as the initial, genetically determined neural structures already producing the experience of the fetus and infant. These nascent models are referred to as neurognostic structures, neurognostic models, or simply neurognosis. When theorists wish to emphasize the neurognostic structures themselves, they may be referred to as structures (in the structuralist sense) or models. The neurognostic structures correspond somewhat to Carl Jung's archetypes.
https://en.wikipedia.org/wiki/Biogenetic_structuralism
Jung's reference to the essential unknowability of the archetypes-in-themselves also applies to neurognostic structures in biogenetic structural formulations. Neurognosis may also refer to the functioning of these neural structures in producing either experience or some other activity unconscious to the individual. This usage is similar to Jung's reference to archetypal imagery, ideas, and activities that emerge into and are active in consciousness. The distinction between neurognostic structures and neurognosis is simply one between structure and function—for example, between the anatomy of the hand and grasping by that hand.
https://en.wikipedia.org/wiki/Biogenetic_structuralism
In economics, a budget constraint represents all the combinations of goods and services that a consumer may purchase given current prices within his or her given income. Consumer theory uses the concepts of a budget constraint and a preference map as tools to examine the parameters of consumer choices . Both concepts have a ready graphical representation in the two-good case. The consumer can only purchase as much as their income will allow, hence they are constrained by their budget. The equation of a budget constraint is P x x + P y y = m {\displaystyle P_{x}x+P_{y}y=m} where P x {\displaystyle P_{x}} is the price of good X, and P y {\displaystyle P_{y}} is the price of good Y, and m is income.
https://en.wikipedia.org/wiki/Budget_constraint
The concept of soft budget constraints is commonly applied to economies in transition. This theory was originally proposed by János Kornai in 1979. It was used to explain the "economic behavior in socialist economies marked by shortage”. In the socialist transition economy there are soft budget constraint on firms because of subsidies, credit and price support.
https://en.wikipedia.org/wiki/Budget_constraint
This theory implies that the survival of a firm depends on financial assistance, especially in a socialist country. The soft budget constraint syndrome usually occurs in the paternalistic role of the State in economic organizations, such as public and private companies and non-profit organizations.
https://en.wikipedia.org/wiki/Budget_constraint
János Kornai also highlighted that there are five dimensions to evaluate the post-socialist transition, including fiscal subsidy, soft taxation, soft bank credit (non-performing loans), soft trade credit (the accumulate rears between firms) and wage arrears.According to the point of view by Cllower , budget constraints are a rational planning assumption with two main attributes. The first is that budget constraints refer to the decision makers' behavioural characteristics --- selling output or acquiring asset income to compensate for spending. This means that adjustment limitation on financial resources are obvious.
https://en.wikipedia.org/wiki/Budget_constraint
The second is to impose constraints on prior variables, such as constraints on current actual demand based on expectations of future financial conditions. The reason for the soft budget constraints is that the excess of expenditure over income will be paid by additional organizations (the State). In addition, the decision maker expects such external financial assistance to be highly probable based on his actions. The further explanation is the more excess spending is covered by external aid, the budget constraints will be more softer.
https://en.wikipedia.org/wiki/Budget_constraint
Bank supervision refers to the supervision on the capital adequacy ratio of banks. When the bank's capital is difficult to finance due to the default of a large number of loans, it can prevent the bank from going bankrupt with the aid of the government, then it will occurs the soft budget constraint of the bank.Dewatripont and Maskin(1995) point out the presence of sunk costs in existing loans may lead to soft budget constraints when banks need additional financial assistance. The internalization of external options can expand the model by allowing banks to allocate funds between new loans and refinancing old loans. Through investment screening and monitoring technology, banks can improve the relative profitability of new loans, thus breaking the equilibrium of soft budget constraints.
https://en.wikipedia.org/wiki/Budget_constraint
Consumer behaviour is a maximization problem. It means making the most of our limited resources to maximize our utility. As consumers are insatiable, and utility functions grow with quantity, the only thing that limits our consumption is our own budget.In general, the budget set (all bundle choices that are on or below the budget line) represents all possible bundles of goods an individual can afford given their income and the prices of goods. A common assumption underlying consumer theory is the concept of well-behaved preferences, and as such, the direction of an individual's preferences will point 45 degrees from the origin.
https://en.wikipedia.org/wiki/Budget_constraint
When behaving rationally, an individual consumer should choose to consume goods at the point where the most preferred available indifference curve on their preference map is tangent to their budget constraint. The tangent point (the xy coordinate) represents the amount of goods x and y the consumer should purchase to fully utilize their budget to obtain maximum utility. It is important to note that the optimal consumption bundle will not always be an interior solution.
https://en.wikipedia.org/wiki/Budget_constraint
If the solution to the optimality condition leads to a bundle that is not feasible, the consumer's optimal bundle will be a corner solution which suggests the goods or inputs are perfect substitutes. A line connecting all points of tangency between the indifference curve and the budget constraint is called the expansion path.All two dimensional budget constraints are generalized into the equation: P x x + P y y = m {\displaystyle P_{x}x+P_{y}y=m} Where: m = {\displaystyle m=} money income allocated to consumption (after saving and borrowing) P x = {\displaystyle P_{x}=} the price of a specific good P y = {\displaystyle P_{y}=} the price of all other goods x = {\displaystyle x=} amount purchased of a specific good y = {\displaystyle y=} amount purchased of all other goodsThe equation can be rearranged to represent the shape of the curve on a graph: y = ( m / P y ) − ( P x / P y ) x {\displaystyle y=(m/P_{y})-(P_{x}/P_{y})x} , where ( m / P y ) {\displaystyle (m/P_{y})} is the y-intercept and ( − P x / P y ) {\displaystyle (-P_{x}/P_{y})} is the slope, representing a downward sloping budget line. The factors that can shift the budget line are a change in income (m), a change in the price of a specific good ( P x {\displaystyle P_{x}} ), or a change in the price of all other goods ( P y {\displaystyle P_{y}} ).
https://en.wikipedia.org/wiki/Budget_constraint
A production-possibility frontier is a constraint in some ways analogous to a budget constraint, showing limitations on a country's production of multiple goods based on the limitation of available factors of production. Under autarky this is also the limitation of consumption by individuals in the country. However, the benefits of international trade are generally demonstrated through allowance of a shift in the consumption-possibility frontiers of each trade partner which allows access to a more appealing indifference curve. In the "toolbox" Hecksher-Ohlin and Krugman models of international trade, the budget constraint of the economy (its CPF) is determined by the terms-of-trade (TOT) as a downward-sloped line with slope equal to those TOTs of the economy. (The TOTs are given by the price ratio Px/Py, where x is the exportable commodity and y is the importable).
https://en.wikipedia.org/wiki/Budget_constraint
While low-level demonstrations of budget constraints are often limited to less than two good situations which provide easy graphical representation, it is possible to demonstrate the relationship between multiple goods through a budget constraint. There are 2 requirements for this case. The first one is that the constraint is not affected if the prices are multiplied by any positive scalar.
https://en.wikipedia.org/wiki/Budget_constraint
The second one is that all commodities are desirable and the constraint will always be binding. In such a case, assuming there are n {\displaystyle n\,} goods, called x i {\displaystyle x_{i}\,} for i = 1 , … , n {\displaystyle i=1,\dots ,n\,} , that the price of good x i {\displaystyle x_{i}\,} is denoted by p i {\displaystyle p_{i}\,} , and if W {\displaystyle \,W\,} is the total amount that may be spent, then the budget constraint is: ∑ i = 1 n p i x i ≤ W . {\displaystyle \sum _{i=1}^{n}p_{i}x_{i}\leq W.}
https://en.wikipedia.org/wiki/Budget_constraint
Further, if the consumer spends his income entirely, the budget constraint binds: ∑ i = 1 n p i x i = W . {\displaystyle \sum _{i=1}^{n}p_{i}x_{i}=W.} In this case, the consumer cannot obtain an additional unit of good x i {\displaystyle x_{i}\,} without giving up some other good. For example, he could purchase an additional unit of good x i {\displaystyle x_{i}\,} by giving up p i / p j {\displaystyle p_{i}/p_{j}\,} units of good x j . {\displaystyle x_{j}.\,}
https://en.wikipedia.org/wiki/Budget_constraint
Budget constraints can be expanded outward or contracted inward through borrowing and lending. By borrowing money in a period, usually at an interest rate r, a consumer can choose to forgo consumption in future periods for extra consumption in the borrowing period. Choosing to borrow would expand the budget constraint in this period and contract budget constraints in future periods.
https://en.wikipedia.org/wiki/Budget_constraint
Alternatively, consumers can choose to lend their money in the current period, usually at a lending rate l. Lending contracts the budget constraint in the current period but expands budget constraints in future periods. According to behavioral economics, choices on borrowing and lending may also be affected by Present bias. In economics, there are two groups of present biased individuals, sophisticated individuals who are aware of their present bias, and naive individuals who are not aware of their present bias.
https://en.wikipedia.org/wiki/Budget_constraint
Electronic signage (also called electronic signs or electronic displays) are illuminant advertising media in the signage industry. Major electronic signage include fluorescent signs, HID (high intensity displays), incandescent signs, LED signs, and neon signs. Besides, LED signs and HID are so-called digital signage.
https://en.wikipedia.org/wiki/Electronic_signage
Electronic signs may be used indoors or outdoors. The display technologies are varied and changing quickly. Because of new display technologies, electronic signs are able to present more clear, colorful, and vivid images. Animated electronic signs gradually replace traditional static signs and increasingly take signage market share.
https://en.wikipedia.org/wiki/Electronic_signage
It is not difficult to have an electronic sign for your business; however, it is not simple to get a permit to install an electronic sign. There are two terms for the advertising industry, off-premises advertising device and on-premises advertising device. Usually, there are different regulatory and zoning set up by different cities for different types of advertising media.
https://en.wikipedia.org/wiki/Electronic_signage
Note: 10 states prohibit animation or moving parts except for public service announcement
https://en.wikipedia.org/wiki/Electronic_signage
The Hollywood Freeway chickens are a colony of feral chickens that live under the Vineland Avenue off-ramp of the Hollywood Freeway (U.S. Route 101) in Los Angeles, California. It is not definitively known how they came to be there, although news stories generally ascribe them to an overturned poultry truck.Chickens underneath the Vineland off-ramp became local celebrities upon their arrival sometime around 1970. By 1976, the flock included about 50 of the chickens, described as Rhode Island Reds.
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
They became known as "Minnie's chickens", named after Minnie Blumfield, an elderly retiree who fed them regularly. When she became too frail to feed them, a young actress, Jodie Mann, with Actors and Others for Animals made arrangements to relocate the chickens.
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
Nearly a hundred of the hens and roosters were relocated to a ranch in Simi Valley, California. But not every member of the flock was apprehended, and those that remained spawned a new population. Subsequent removal efforts in the following years all had a similar outcome. The first colony at the Vineland ramp has spread and there is now a second colony at the Burbank ramp, two miles away.The survival of the chicken colony and their spreading to another freeway ramp has inspired a short story by Terry Pratchett, "Hollywood Chickens".
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
Beginning in the 1980s, twenty years after the colony's arrival, various individuals started coming forward claiming to know the mystery of their origin. Among them: In 1990, Jeff Stein of Granada Hills, California claimed that in 1968, when his wife Janet and her twin sister were 12, they learned that a nearby school that raised animals was closing and that its resident chickens would be killed. The twins scooped them up and succeeded in hiding them at home until the roosters started waking up every morning at 5 a.m. The chickens couldn't stay, so the girls hiked through a field to an open area near the freeway and deposited two pillowcases full of them there.
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
In 1992, a North Hollywood man who would give only his first name ("Michael") claimed that as a child he and his brother put their pet chickens under the freeway after neighbors repeatedly complained about them. "We were afraid to confess after (their numbers) got out of hand because we thought the city would bill us", he said. The widely believed, but never verified explanation about an overturned poultry truck on the freeway resurfaced in 2000 when Joe Silbert of Laguna Hills, California claimed to be the driver of the legendary vehicle, saying, "I tried to avoid a lady who cut in front of me and I turned over.
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
I was taking anywhere from 500 to 1,000 chickens back from the Valley to a slaughterhouse in L.A. They were all hens. We never picked up roosters.
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
These were hens that had stopped laying. They would eat but not produce, so they were costing farmers money. Anyway, I had a crate of eggs on the seat beside me, and when I turned over, my head fell into the crate.
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
But I wasn't hurt. I started chasing one chicken and it was on the TV news that night." A colony of hens without a rooster would not be able to reproduce, making this explanation rather dubious.Nevertheless, there was at least one witness to the overturned poultry truck explanation.
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
A driver on the way to work in Glendale was proceeding south on the 5 Freeway when she spotted three cars off to the side of the road that had been involved in a multiple rear-end collision. Blood and feathers were all over the freeway. On the overpass right above the accident site was a truck loaded with poultry cages, and each cage contained multiple chickens. Below, on the freeway, a smashed poultry cage was off to one side, and chickens could be seen walking around in the freeway median (which did not have walls at the time). This peculiar chapter of Los Angeles history was going to be commemorated in 1984 with a large mural painted along the north wall of the Hollywood Freeway, but the mural was ultimately rejected for funding and not completed.
https://en.wikipedia.org/wiki/Hollywood_Freeway_chickens
Commodore Barry Park is an urban park in the Fort Greene neighborhood of the New York City borough of Brooklyn. The park is operated by the New York City Department of Parks and Recreation. It encompasses an area of 10.39 acres (42,000 m2) and holds baseball, basketball, football, swimming pool and playground fields/facilities.
https://en.wikipedia.org/wiki/Commodore_Barry_Park
The park was acquired in 1836 by the Village of Brooklyn (long before it was absorbed into New York City). When first acquired, it was called "City Park". It is the oldest park in the borough, and it was named for Commodore John Barry in 1951 due to its location next to the Brooklyn Navy Yard that Barry helped found.
https://en.wikipedia.org/wiki/Commodore_Barry_Park
Shakey the Robot was the first general-purpose mobile robot able to reason about its own actions. While other robots would have to be instructed on each individual step of completing a larger task, Shakey could analyze commands and break them down into basic chunks by itself. Due to its nature, the project combined research in robotics, computer vision, and natural language processing. Because of this, it was the first project that melded logical reasoning and physical action. Shakey was developed at the Artificial Intelligence Center of Stanford Research Institute (now called SRI International). Some of the most notable results of the project include the A* search algorithm, the Hough transform, and the visibility graph method.
https://en.wikipedia.org/wiki/Shakey_the_robot
Shakey was developed from approximately 1966 through 1972 with Charles Rosen, Nils Nilsson and Peter Hart as project managers. Other major contributors included Alfred Brain, Sven Wahlstrom, Bertram Raphael, Richard Duda, Richard Fikes, Thomas Garvey, Helen Chan Wolf and Michael Wilber. The project was funded by the Defense Advanced Research Projects Agency (DARPA). Now retired from active duty, Shakey is currently on view in a glass display case at the Computer History Museum in Mountain View, California. The project inspired numerous other robotics projects, most notably the Centibots.
https://en.wikipedia.org/wiki/Shakey_the_robot
The robot's programming was primarily done in LISP. The Stanford Research Institute Problem Solver (STRIPS) planner it used was conceived as the main planning component for the software it utilized. As the first robot that was a logical, goal-based agent, Shakey experienced a limited world. A version of Shakey's world could contain a number of rooms connected by corridors, with doors and light switches available for the robot to interact with.Shakey had a short list of available actions within its planner.
https://en.wikipedia.org/wiki/Shakey_the_robot
These actions involved traveling from one location to another, turning the light switches on and off, opening and closing the doors, climbing up and down from rigid objects, and pushing movable objects around. The STRIPS automated planner could devise a plan to enact all the available actions, even though Shakey himself did not have the capability to execute all the actions within the plan personally. An example mission for Shakey might be something like: "An operator types the command "push the block off the platform" at a computer console.
https://en.wikipedia.org/wiki/Shakey_the_robot
Shakey looks around, identifies a platform with a block on it, and locates a ramp in order to reach the platform. Shakey then pushes the ramp over to the platform, rolls up the ramp onto the platform, and pushes the block off the platform. Mission accomplished."
https://en.wikipedia.org/wiki/Shakey_the_robot
Physically, the robot was particularly tall, and had an antenna for a radio link, sonar range finders, a television camera, on-board processors, and collision detection sensors ("bump detectors"). The robot's tall stature and tendency to shake resulted in its name: We worked for a month trying to find a good name for it, ranging from Greek names to whatnot, and then one of us said, 'Hey, it shakes like hell and moves around, let’s just call it Shakey.'
https://en.wikipedia.org/wiki/Shakey_the_robot
The development of Shakey provided far-reaching impact on the fields of robotics and artificial intelligence, as well as computer science in general. Some of the more notable results include the development of the A* search algorithm, which is widely used in pathfinding and graph traversal, the process of plotting an efficiently traversable path between points; the Hough transform, which is a feature extraction technique used in image analysis, computer vision, and digital image processing; and the visibility graph method for finding Euclidean shortest paths among obstacles in the plane.
https://en.wikipedia.org/wiki/Shakey_the_robot
After SRI published a 24-minute video in 1969 entitled "SHAKEY: Experimentation in Robot Learning and Planning", the project received significant media attention. This included an April 10, 1969 article in the New York Times; In 1970, Life referred to Shakey as the "first electronic person"; and in November 1970 National Geographic Magazine covered Shakey and the future of computers. The Association for the Advancement of Artificial Intelligence's AI Video Competition's awards are named "Shakeys" because of the significant impact of the 1969 video.Shakey was inducted into Carnegie Mellon University's Robot Hall of Fame in 2004 alongside such notables as ASIMO and C-3PO.Shakey has been honored with a prestigious IEEE Milestone in Electrical Engineering and Computing.Shakey was showcased in the BBC – Towards Tomorrow: Robot (1967) documentary.
https://en.wikipedia.org/wiki/Shakey_the_robot
Deference (also called submission or passivity) is the condition of submitting to the espoused, legitimate influence of one's superior or superiors. Deference implies a yielding or submitting to the judgment of a recognized superior, out of respect or reverence. Deference has been studied extensively by political scientists, sociologists, and psychologists.
https://en.wikipedia.org/wiki/Deference
Smolenski (2005) examines deference in colonial Pennsylvania, to see how claims to political authority were made, justified, and accepted or rejected. He focuses on the "colonial speech economy," that is, the implicit rules that determined who was allowed to address whom and under what conditions, and describes how the qualities that inspired deference changed in the province from 1691 to 1764. The Quaker elite initially established a monopoly on political leadership based on what they believed to be their inherent civic virtue grounded in their religious and social class. By 1760, this view had been discredited and replaced with the consensus that civic virtue was an achieved, not an inherent, attribute and that it should be demonstrated by the display of appropriate manliness and the valor of men who were willing to take up arms for the common defense of the colony. Further, Pennsylvanians came to believe that all white men, not just wealthy property owners, were equally capable of achieving political voice. Martial masculinity, therefore, became the defining characteristic of the ideal citizen and marked a significant transformation in the way individuals justified their right to represent the public interest.
https://en.wikipedia.org/wiki/Deference
Erving Goffman, a Canadian-born sociologist and writer, explored the relationship between deference and demeanor in his 1967 essay "The Nature of Deference and Demeanor". According to Goffman, a person with a poor demeanor will be held in lower esteem in the eyes of society. The same is true for people who behave in a good demeanor, however: society will hold them in a higher esteem. An example of this situation can be seen through the way a person acts in a social setting.
https://en.wikipedia.org/wiki/Deference
e.g. a man pulling out a chair for a woman at a restaurant. On the other end of the spectrum, a person not bathing before they go to a fancy dinner party.
https://en.wikipedia.org/wiki/Deference
These examples can be defined as presentational deference. Demeanor does not only limit itself to the actions of an individual, but also the appearance of an individual. A person offers themselves to a social group through a good appearance or a well demeanored appearance.
https://en.wikipedia.org/wiki/Deference
When an individual has a well demeanored appearance it makes interaction between people easier. After a person is socially accepted to a group, it is expected that they will conform to interactional norms. Through acting on those norms, people receive deference.
https://en.wikipedia.org/wiki/Deference
There is ongoing debate among psychologists as to the extent to which deference in a relationship is determined by a person's innate personality type or is the result of a person's experiences and conditioning. In interpersonal relationships, a partner can assume a submissive role to fit in or to make themself acceptable to the other partner, which can be a benign aspect of a relationship. On the other hand, it may be an indication of an interpersonal problem, such as partner abuse. If one or both of the people are experiencing chronic, pervasive emotional distress then the sex partners or individuals may require psychological evaluation.
https://en.wikipedia.org/wiki/Deference
In interpersonal relationships, some people prefer or are willing to adopt a submissive role in sexual activities or personal matters. The level and type of submission can vary from person to person, and from one context to another; and also is dependent on the other partner being willing to assume control in those situations. Some people can include occasional acts of submission in an otherwise conventional sex life, or adopt a submissive lifestyle.
https://en.wikipedia.org/wiki/Deference
Submission is also a common behavior in the animal kingdom, with a prevalence that spans the whole vertebrate-invertebrate gamut. Signs of submission are used either to preempt dangerous combat (in which case they usually appear at the beginning of an encounter) or to establish a dominance hierarchy (in which case they usually appear after the encounter). Often the behaviors used to appease the opponent or yield to his authority are of a stereotyped nature (e.g., bowing of the head, crouching, prostration, placing the tail between the legs, lying on ones back, grooming) but can sometimes develop into elaborate ritualistic performances (e.g., food supplication by the submissive animal, regurgitation of food by the dominant and ingestion of the regurgitated food by the submissive). It is believed by some researchers that part of the instinctive machinery subserving these behaviors is related to that used to evade or withstand predator attacks where similar behaviors appear (e.g., crouching, prostration, lying on the back). Other researchers have speculated what functions, if any, these behaviors may play in modern humans and come up with several possibilities (mostly from an evolutionary perspective); that they help in the establishment of parent-child attachment and pair bond formation, that they promote the development of theory of mind, that they play a role in the emergence of language, and that they may lay behind the higher cooperative and communicative abilities of humans.
https://en.wikipedia.org/wiki/Deference
Greek East and Latin West are terms used to distinguish between the two parts of the Greco-Roman world and of medieval Christendom, specifically the eastern regions where Greek was the lingua franca (Greece, Anatolia, the southern Balkans, the Levant, and Egypt) and the western parts where Latin filled this role (Italy, Gaul, Hispania, North Africa, the northern Balkans, territories in Central Europe, and the British Isles). Greek had spread as a result of previous Hellenization, whereas Latin was the official administrative language of the Roman state, stimulating Romanization. In the east, where both languages co-existed within the Roman administration for several centuries, the use of Latin ultimately declined as the role of Greek was further encouraged by administrative changes in the empire's structure between the 3rd and 7th centuries, which led to the split between the Eastern Roman Empire and the Western Roman Empire, the collapse of the latter, and failed attempts to restore unity by the former. This Greek–Latin divide continued with the East–West Schism of the Christian world during the Early Middle Ages.
https://en.wikipedia.org/wiki/Greek_East_and_Latin_West
In the classical context, "Greek East" refers to the provinces and client states of the Roman Empire in which the lingua franca was primarily Greek.This region included the whole Greek peninsula with some other northern parts in the Balkans, the provinces around the Black Sea, those of the Bosphorus, all of Asia Minor (in the loosest possible sense, to include Cappadocia and extending to Armenia Minor), Magna Graecia (southern part of the Italian peninsula and Sicily), and the other provinces along the eastern rim of the Mediterranean Sea (Judea, Syria, Cyrenaica and Egypt). These Roman provinces had been Greek colonies or Greek-ruled states during the Hellenistic period, i.e. until the Roman conquests.At the start of late antiquity, beginning with the reorganization of the empire's provincial divisions during the reign of Diocletian (ruled 284–305), the concept of the Greek East developed to stand in contradistinction to the Latin West. Thereafter, Greek East refers to the Greek-speaking provinces mentioned above (after 395 mostly in the Greek-speaking Eastern Roman Empire) in contradistinction to the provinces in Western Europe, Italia (excluding the Catepanate of Italy, where they still spoke Greek) and Northwest Africa (after 395 in the Latin-speaking Western Roman Empire).
https://en.wikipedia.org/wiki/Greek_East_and_Latin_West
"Greek East" and "Latin West" are terms used also to divide Chalcedonian Christianity into the Greek-speaking, Eastern Orthodox peoples of the Eastern Mediterranean Basin, centered on the Byzantine Empire, and the Latin-speaking Catholic peoples of Western Europe. Here, Latin West applies to regions that were formerly part of the Western Roman Empire, specifically Italia, Gallia (Gaul), Hispania, Northwest Africa, and Britannia, but also to areas that had never been part of the Empire but which later came under the culture sphere of the Latin West, such as Magna Germania, Hibernia (Ireland), Caledonia (Scotland). In this sense, the term "Latin" came to refer to the liturgical and scholarly language of Western Europe, since many of these countries did not actually speak Latin.Modern scholars agree that by the 12th century, theological debate (or disputatio) between Christians of the Greek East and Latin West was focused on three Christian doctrines: 'the so-called filioque controversy regarding the procession of the Holy Spirit, leavened or unleavened bread in the Eucharist, and the primacy of the pope.' However, it is not known when or how this began.
https://en.wikipedia.org/wiki/Greek_East_and_Latin_West
British philosopher Philip Sherrard (1959) claimed that the cause of Christendom's split into a Greek East and a Latin West was differing conceptions of sacerdotium and regnum, leading the Orthodox Patriarchate in Constantinople to never lay claim to secular power, but submit to the Byzantine emperor and later the Ottoman sultan (supposedly the reason for the 'eastern submission to autocracy'), while the Catholic Papacy persistently laid claim to have authority over the secular princes of Western Europe (allegedly 'the roots of modern democracy'). E. Evans (1960) panned Sherrard's book, writing: '...it must be said that unless the obscurity of the writer's language has dulled the reader's intelligence, neither the Filioque clause nor the developments of modern international politics are really shown to depend on the western as opposed to the eastern, the Latin as opposed to the Greek, doctrine of God and of creation: the argument, if there is one, is per saltum, and need amount to no more than an a posteriori interpretation of historical facts in the light of preconceived ideas. 'According to English theologian Andrew Louth (2007), the Byzantine/Roman Empire and the early Church constituted a multilingual and 'multi-cultural civilization' until the 7th century, but after a period of transition, which he dated from 681 (Third Council of Constantinople) to 1071 (Battle of Manzikert), Christendom had split into a "Greek East" and "Latin West", which he considered 'two Christian civilizations' in reference to Huntington's Clash of Civilizations thesis.
https://en.wikipedia.org/wiki/Greek_East_and_Latin_West
Louth primarily attributed this purported 'transition from multi-cultural Byzantium to Greek East and Latin West the rise of Islam and the Arab destruction of the stability of the Mediterranean world in the seventh century.' Nevertheless, the transition was a slow and complicated process with many factors rather than a single historic event, which 'set the two halves of Christianity on their gradually diverging tracks', as Byzantine literature professor Alexander Alexakis (2010) summarised Louth's analysis. These included observations that the Byzantine church-state dualism remained intact after the Western Roman Empire's collapse, while bishops and eventually the pope in the West sometimes wielded secular power, but the Carolingian monarchs' renovatio also promoted theological thought at a time when the pope was embroiled in worldly affairs (8th–9th century), that the Byzantine Iconoclasm controversy caused 'the first rift between Rome and Constantinople', and that the simultaneous missionary efforts to convert the Slavs led to a 'second point of contention between Rome and Constantinople', especially in Bulgaria (9th–10th century).
https://en.wikipedia.org/wiki/Greek_East_and_Latin_West
Louth agreed with 'the prevailing (and more plausible) theory that assigns no particular importance to the events of 1054' (the East–West Schism) 'as far as the people of that era were concerned', and that the schism only became significant during the preliminaries to the 1245 and 1274 Councils of Lyon.The term "Greek" varies in how it is applied. In the most narrow sense, after the rise of the Roman Empire it is only applied to the Eastern Roman (Byzantine) Empire. Depending on the author it may also be applied to: Areas where the Greek language was the common scholarly and religious language during classical Roman times and the early Middle Ages, including Syria, Egypt, Palestine, etc. Areas that have historically been in communion with the (formerly Byzantine) Eastern Orthodox Church, which includes Russia and much of Eastern Europe, but largely excludes Egypt, Syria, Armenia, etc. which largely opposed the influence of Constantinople having formed what are now called the Church of the East and Oriental Orthodoxy.
https://en.wikipedia.org/wiki/Greek_East_and_Latin_West
The Romanians spoke a Romance language but followed the Byzantine Church. Areas that were heavily culturally influenced by the Byzantine Empire, directly or indirectly, during the Middle Ages, including Eastern Europe and the Islamic Empiresnote: among Muslim historians, "Greek" and "Roman" are often categories specifically associated with Christians.
https://en.wikipedia.org/wiki/Greek_East_and_Latin_West
Though the Sultanate of Rome and, later, the Ottoman Empire would adopt Byzantine titles and describe themselves as rulers of "Rome," this was a geographic designation, much in the same way that the Ghaznavids or Delhi Sultans would be known as rulers of "Hindustan. "The term "Latin" has survived much longer as a unifying term for the West because the Latin language survived until relatively recently as a scholarly and liturgical language despite the fragmentation and religious changes in Western Europe. The Greek language, by contrast, died out somewhat quickly in the Arab lands, and the Orthodox Slavic nations never fully embraced the language despite their long religious affiliation with the Eastern Romans/Byzantines.
https://en.wikipedia.org/wiki/Greek_East_and_Latin_West
The mandibular second premolar is the tooth located distally (away from the midline of the face) from both the mandibular first premolars of the mouth but mesial (toward the midline of the face) from both mandibular first molars. The function of this premolar is assist the mandibular first molar during mastication, commonly known as chewing. Mandibular second premolars have three cusps. There is one large cusp on the buccal side (closest to the cheek) of the tooth.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
The lingual cusps (located nearer the tongue) are well developed and functional (which refers to cusps assisting during chewing). Therefore, whereas the mandibular first premolar resembles a small canine, the mandibular second premolar is more alike to the first molar. There are no deciduous (baby) mandibular premolars.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
Instead, the teeth that precede the permanent mandibular premolars are the deciduous mandibular molars. Anatomy: The mandibular second premolar most commonly has three cusps but can have two as well. The three cusp variety has one large cusp on the buccal with two smaller lingual cusps.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
The mesiolingual cusp is twice the size of the distolingual cusp. Viewed from the occlusal (looking down onto the biting surface of the tooth) the tooth is rather square in outline, particularly on the lingual. The occlusal table (the area bounded by the cusps, cusp ridges, and marginal ridges) is rectangular.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
The groove pattern is shaped like a “Y” with the tail pointed to the lingual and placed between the distolingual and mesiolingual cusps one third of the distance form the distal to the mesial. The contacts with the adjacent teeth are positioned buccal to the midpoint. Viewed from the buccal the buccal cusp tip is centered mesiodistally.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
The buccal cusp ridges exhibit slight concavities that extend over the buccal surfaces as developmental grooves into the gingival embrasure. The contacts with adjacent teeth are in the occlusal third of the tooth with the distal height of contour slightly closer to the gingival than the mesial height of contour. The root is generally straight with slight curvature to the distal in the apical third.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
Viewed from the mesial or distal the buccal height of contour is in the gingival third of the tooth. The lingual height of contour is in the middle third of the tooth (not the middle third of the lingual cusp). When divided into thirds from the buccal height of contour to the lingual height of contour, the buccal cusp is at the contact between the buccal and middle thirds and the central groove is at the contact of the middle and lingual thirds.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
The two cusp variety generally has a groove pattern shaped like a “U” or “H”. Viewed from the occlusal it is more rounded in general and its lingual cusp is positioned slightly to the mesial, while the occlusal table remains squared. Viewed from the buccal the buccal cusp is centered over the root as in the three cusp variety.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
Viewed from the mesial or distal its heights of contour are similar to the three cusp variety. Sometimes, premolars are referred to as bicuspids.
https://en.wikipedia.org/wiki/Mandibular_second_premolar
Even though the terms are synonymous, "bicuspid" refers to having two functional cusps, and the mandibular second premolar is an example of a premolar with three functional cusps. Thus, "biscupid" is technically not as accurate as "premolar". In the universal system of notation, the permanent mandibular premolars are designated by a number.
https://en.wikipedia.org/wiki/Mandibular_second_premolar