90-671: Amusement Expo is an annual convention featuring and showcasing vendors , developers and businesses having to do with coin activated amusements such as video arcade machines, electro-mechanical games, ticket/redemption skill and chance games , and jukeboxes . The show is held annually in March at the Las Vegas Convention Center . The history of the Amusement Expo can be traced back to March 1980 when Play Meter magazine founder, Ralph Lally established
180-465: A central point. An example would be when we use parentheses in writing. We tend to perceive all of the words in the parentheses as one section instead of individual words within the parentheses. The Law of Continuity tells us that objects are grouped together by their elements and then perceived as a whole. This usually happens when we see overlapping objects. We will see the overlapping objects with no interruptions. The Law of Past Experience refers to
270-622: A convention to propose amendments to the Constitution. Sense A sense is a biological system used by an organism for sensation , the process of gathering information about the surroundings through the detection of stimuli . Although, in some cultures, five human senses were traditionally identified as such (namely sight , smell , touch , taste , and hearing ), many more are now recognized. Senses used by non-human organisms are even greater in variety and number. During sensation, sense organs collect various stimuli (such as
360-513: A gathering of individuals who meet at an arranged place and time in order to discuss or engage in some common interest. The most common conventions are based upon industry , profession , and fandom . Trade conventions typically focus on a particular industry or industry segment, and feature keynote speakers, vendor displays, and other information and activities of interest to the event organizers and attendees. Professional conventions focus on issues of concern along with advancements related to
450-403: A group, but we can also perceive three groups of two lines with seven objects in each line. The Law of Closure is the idea that we as humans still see a full picture even if there are gaps within that picture. There could be gaps or parts missing from a section of a shape, but we would still perceive the shape as whole. The Law of Symmetry refers to a person's preference to see symmetry around
540-485: A human), close your eyes (preferably in a dark room) and press gently on the outside corner of one eye through the eyelid. You will see a visual spot toward the inside of your visual field, near your nose.) All stimuli received by the receptors are transduced to an action potential , which is carried along one or more afferent neurons towards a specific area ( cortex ) of the brain . Just as different nerves are dedicated to sensory and motors tasks, different areas of
630-586: A materialistic view of the mind. Some examples of human absolute thresholds for the nine to 21 external senses . Humans respond more strongly to multimodal stimuli compared to the sum of each single modality together, an effect called the superadditive effect of multisensory integration . Neurons that respond to both visual and auditory stimuli have been identified in the superior temporal sulcus . Additionally, multimodal "what" and "where" pathways have been proposed for auditory and tactile stimuli. External receptors that respond to stimuli from outside
720-495: A mechanoreceptor. Photoreceptors convert light (visible electromagnetic radiation ) into signals. Chemical stimuli can be interpreted by a chemoreceptor that interprets chemical stimuli, such as an object's taste or smell, while osmoreceptors respond to a chemical solute concentrations of body fluids. Nociception (pain) interprets the presence of tissue damage, from sensory information from mechano-, chemo-, and thermoreceptors. Another physical stimulus that has its own type of receptor
810-468: A particular color . Visible light is electromagnetic radiation with a wavelength between 380 and 720 nm. Wavelengths of electromagnetic radiation longer than 720 nm fall into the infrared range, whereas wavelengths shorter than 380 nm fall into the ultraviolet range. Light with a wavelength of 380 nm is blue whereas light with a wavelength of 720 nm is dark red . All other colors fall between red and blue at various points along
900-471: A respective visual system (sense of vision), auditory system (sense of hearing), somatosensory system (sense of touch), olfactory system (sense of smell), and gustatory system (sense of taste). Those systems, in turn, contribute to vision , hearing , touch , smell , and the ability to taste . Internal sensation, or interoception, detects stimuli from internal organs and tissues. Many internal sensory and perceptual systems exist in humans, including
990-439: A sense, but it is generally regarded as a cognitive (that is, post-sensory) function of the visual cortex of the brain where patterns and objects in images are recognized and interpreted based on previously learned information. This is called visual memory . The inability to see is called blindness . Blindness may result from damage to the eyeball, especially to the retina, damage to the optic nerve that connects each eye to
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#17327755942141080-498: A series of tiny bones to hair-like fibers in the inner ear , which detect mechanical motion of the fibers within a range of about 20 to 20,000 hertz , with substantial variation between individuals. Hearing at high frequencies declines with an increase in age. Inability to hear is called deafness or hearing impairment. Sound can also be detected as vibrations conducted through the body. Lower frequencies that can be heard are detected this way. Some deaf people are able to determine
1170-416: A sound or smell) for transduction , meaning transformation into a form that can be understood by the brain. Sensation and perception are fundamental to nearly every aspect of an organism's cognition , behavior and thought . In organisms, a sensory organ consists of a group of interrelated sensory cells that respond to a specific type of physical stimulus. Via cranial and spinal nerves (nerves of
1260-478: A specific type of stimulus. For example, the general sensation and perception of touch, which is known as somatosensation, can be separated into light pressure, deep pressure, vibration, itch, pain, temperature, or hair movement, while the general sensation and perception of taste can be separated into submodalities of sweet , salty , sour , bitter , spicy, and umami , all of which are based on different chemicals binding to sensory neurons . Sensory receptors are
1350-488: A state's constitution, are limited to addressing the constitutional matters of that particular state alone. Nearly all of the sovereign states do not yet have statutory provisions for conventions beyond their permanent legislature, state amendatory conventions , and conventions for ratification of proposals to amend the Constitution . There are no state laws explicitly providing for the election of delegates for
1440-662: A stimulus is constant and unchanging, perceptual sensory adaptation occurs. During that process, the subject becomes less sensitive to the stimulus. Biological auditory (hearing), vestibular and spatial, and visual systems (vision) appear to break down real-world complex stimuli into sine wave components, through the mathematical process called Fourier analysis. Many neurons have a strong preference for certain sine frequency components in contrast to others. The way that simpler sounds and images are encoded during sensation can provide insight into how perception of real-world objects happens. Perception occurs when nerves that lead from
1530-669: A stronger sense of smell than humans. Some animal species lack one or more human sensory system analogues and some have sensory systems that are not found in humans, while others process and interpret the same sensory information in very different ways. For example, some animals are able to detect electrical fields and magnetic fields , air moisture , or polarized light . Others sense and perceive through alternative systems such as echolocation . Recent theory suggests that plants and artificial agents such as robots may be able to detect and interpret environmental information in an analogous manner to animals. Sensory modality refers to
1620-411: Is a molecule called propylthiouracil (PROP) that some humans experience as bitter, some as almost tasteless, while others experience it as somewhere between tasteless and bitter. There is a genetic basis for this difference between perception given the same sensory stimulus. This subjective difference in taste perception has implications for individuals' food preferences, and consequently, health. When
1710-429: Is a perception resulting from activation of neural receptors , generally in the skin including hair follicles , but also in the tongue , throat , and mucosa . A variety of pressure receptors respond to variations in pressure (firm, brushing, sustained, etc.). The touch sense of itching caused by insect bites or allergies involves special itch-specific neurons in the skin and spinal cord. The loss or impairment of
1800-482: Is attached to the tympanic membrane and articulates with the incus. The incus, in turn, articulates with the stapes. The stapes is then attached to the inner ear , where the sound waves will be transduced into a neural signal. The middle ear is connected to the pharynx through the Eustachian tube , which helps equilibrate air pressure across the tympanic membrane. The tube is normally closed but will pop open when
1890-438: Is based on their location relative to the stimuli. An exteroceptor is a receptor that is located near a stimulus of the external environment, such as the somatosensory receptors that are located in the skin. An interoceptor is one that interprets stimuli from internal organs and tissues, such as the receptors that sense the increase in blood pressure in the aorta or carotid sinus . The cells that interpret information about
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#17327755942141980-489: Is concerned with the nature of perceptual experience and the status of perceptual data , in particular how they relate to beliefs about, or knowledge of, the world. Historical inquiries into the underlying mechanisms of sensation and perception have led early researchers to subscribe to various philosophical interpretations of perception and the mind , including panpsychism , dualism , and materialism . The majority of modern scientists who study sensation and perception take on
2070-431: Is dedicated to the auditory system . The main point is to understand why humans are able to use sound in thinking outside of actually saying it. Relating to auditory cognitive psychology is psychoacoustics . Psychoacoustics is more directed at people interested in music. Haptics , a word used to refer to both taction and kinesthesia, has many parallels with psychoacoustics. Most research around these two are focused on
2160-465: Is described by Steven's power law . Signal detection theory quantifies the experience of the subject to the presentation of a stimulus in the presence of noise . There is internal noise and there is external noise when it comes to signal detection. The internal noise originates from static in the nervous system. For example, an individual with closed eyes in a dark room still sees something—a blotchy pattern of grey with intermittent brighter flashes—this
2250-549: Is encoded or transduced. Multimodality integrates different senses into one unified perceptual experience. For example, information from one sense has the potential to influence how information from another is perceived. Sensation and perception are studied by a variety of related fields, most notably psychophysics , neurobiology , cognitive psychology , and cognitive science . Sensory organs are organs that sense and transduce stimuli. Humans have various sensory organs (i.e. eyes, ears, skin, nose, and mouth) that correspond to
2340-410: Is internal noise. External noise is the result of noise in the environment that can interfere with the detection of the stimulus of interest. Noise is only a problem if the magnitude of the noise is large enough to interfere with signal collection. The nervous system calculates a criterion, or an internal threshold, for the detection of a signal in the presence of noise. If a signal is judged to be above
2430-425: Is often multimodal. Multimodality integrates different senses into one unified perceptual experience. Information from one sense has the potential to influence how information from another is perceived. Multimodal perception is qualitatively different from unimodal perception. There has been a growing body of evidence since the mid-1990s on the neural correlates of multimodal perception. The philosophy of perception
2520-594: Is seen into patterns or groups: Common Fate, Similarity, Proximity, Closure, Symmetry, Continuity, and Past Experience. The Law of Common fate says that objects are led along the smoothest path. People follow the trend of motion as the lines/dots flow. The Law of Similarity refers to the grouping of images or objects that are similar to each other in some aspect. This could be due to shade, colour, size, shape, or other qualities you could distinguish. The Law of Proximity states that our minds like to group based on how close objects are to each other. We may see 42 objects in
2610-428: Is temperature, which is sensed through a thermoreceptor that is either sensitive to temperatures above (heat) or below (cold) normal body temperature. Each sense organ (eyes or nose, for instance) requires a minimal amount of stimulation in order to detect a stimulus. This minimum amount of stimulus is called the absolute threshold. The absolute threshold is defined as the minimum amount of stimulation necessary for
2700-523: Is the sensation of potentially damaging stimuli. Mechanical, chemical, or thermal stimuli beyond a set threshold will elicit painful sensations. Stressed or damaged tissues release chemicals that activate receptor proteins in the nociceptors. For example, the sensation of heat associated with spicy foods involves capsaicin , the active molecule in hot peppers. Low frequency vibrations are sensed by mechanoreceptors called Merkel cells , also known as type I cutaneous mechanoreceptors. Merkel cells are located in
2790-673: The American Civil War . These conventions offered opportunities for free-born and formerly enslaved African Americans to organize and strategize for racial justice . These early conventions argued for the abolition of slavery, equal educational opportunities, land reform, and the merits of emigration out of the United States. Prior to the ratification of the United States Constitution, a convention of independent states would hold sovereign power over
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2880-728: The Commerce Clause . Examples of this form of convention include the Yellowstone River Compact Commission , Red River Compact Commission , Colorado River Compact , and the Delaware River Basin Commission . Interstate conventions, otherwise known as conventions of states , may be called by the Governor as well, such was the case with a series of meetings from December 15, 1814, to January 5, 1815, collectively known as
2970-471: The Hartford Convention . The convention was called to address the ongoing War of 1812 , as well as, an array of problems arising from the growth of the federal government. Single state conventions may be called due to a provision of the state's constitution, by referendum, or in response to amendment proposal from Congress. To date, there have been 233 state-level conventions in the history of
3060-703: The Seneca Falls Convention , the Rochester Women's Rights Convention of 1848 , and the National Women's Rights Conventions . Collectively, these conventions directly led to the Nineteenth Amendment to the United States Constitution securing a woman's right to vote . The Colored Conventions Movement was a series of national, regional, and state conventions held irregularly during the decades preceding and following
3150-661: The United States Congress , to deliberate and propose amendments to the Constitution. Under Article Five, Congress is obligated to call such a convention when thirty-four states have formally submitted to Congress, a joint resolution known as a state application . To date, the Clerk of the United States House of Representatives has identified nearly two hundred of these applications. Yet, this method of proposal remains elusive and has never occurred in
3240-489: The cell membrane that mediates a physiological change in a neuron, most often through the opening of ion channels or changes in the cell signaling processes. Transmembrane receptors are activated by chemicals called ligands . For example, a molecule in food can serve as a ligand for taste receptors. Other transmembrane proteins, which are not accurately called receptors, are sensitive to mechanical or thermal changes. Physical changes in these proteins increase ion flow across
3330-698: The constitutional and legislative assembly which sat from September 20, 1792, to October 26, 1795. The governing bodies of religious groups may also be called conventions, such as the General Convention of the Episcopal Church USA and the Southern Baptist Convention . Conventions in general enjoy a long history and rich tradition within the United States due in part to their epistemic, moral, and transformative nature. So much so that they have been stitched into
3420-410: The sensory organs (e.g. eye) to the brain are stimulated, even if that stimulation is unrelated to the target signal of the sensory organ. For example, in the case of the eye, it does not matter whether light or something else stimulates the optic nerve, that stimulation will results in visual perception, even if there was no visual stimulus to begin with. (To prove this point to yourself (and if you are
3510-433: The stratum basale of the epidermis . Deep pressure and vibration is transduced by lamellated ( Pacinian ) corpuscles, which are receptors with encapsulated endings found deep in the dermis, or subcutaneous tissue. Light touch is transduced by the encapsulated endings known as tactile ( Meissner ) corpuscles. Follicles are also wrapped in a plexus of nerve endings known as the hair follicle plexus. These nerve endings detect
3600-594: The vestibular system (sense of balance) sensed by the inner ear and providing the perception of spatial orientation ; proprioception (body position); and nociception (pain). Further internal chemoreception - and osmoreception -based sensory systems lead to various perceptions, such as hunger , thirst , suffocation , and nausea , or different involuntary behaviors, such as vomiting . Nonhuman animals experience sensation and perception, with varying levels of similarity to and difference from humans and other animal species. For example, other mammals in general have
3690-416: The "blue" cones predominantly. The relative activation of the three different cones is calculated by the brain, which perceives the color as blue. However, cones cannot react to low-intensity light, and rods do not sense the color of light. Therefore, our low-light vision is—in essence—in grayscale . In other words, in a dark room, everything appears as a shade of gray . If you think that you can see colors in
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3780-545: The Amusement Showcase International (ASI)–a name that was used from 1997 to 2009. In 2009, ASI merged with a show held by the Amusement & Music Operators Association (AMOA) and become the Amusement Expo. This video game culture –related article is a stub . You can help Misplaced Pages by expanding it . Convention (meeting) A convention (or event ), in the sense of a meeting, is
3870-678: The Central and Peripheral nervous systems that relay sensory information to and from the brain and body), the different types of sensory receptor cells (such as mechanoreceptors , photoreceptors , chemoreceptors , thermoreceptors ) in sensory organs transduct sensory information from these organs towards the central nervous system, finally arriving at the sensory cortices in the brain , where sensory signals are processed and interpreted (perceived). Sensory systems, or senses, are often divided into external (exteroception) and internal ( interoception ) sensory systems. Human external senses are based on
3960-700: The Confederate Congress. However, most of these conventions were called by state legislatures to resolve boundary disputes; others were called for economic purposes; such as was the case with the Annapolis Convention that ultimately led to the framing of the Constitution. Since ratification however, it has become widely understood that the Constitution recognizes the authority of states and state legislatures to appoint commissioners to these type of conventions,. Although any agreements they may reach are subject to Congressional approval under
4050-410: The United States dating back well before the ratification of the Constitution, confusion and controversy has emerged in recent decades. Perhaps, most prominent among them is the distinction between what constitutes a state convention and what constitutes a federal convention. Fortunately this can be determined by identification of the convening authority. A federal convention is one called and convened for
4140-859: The United States, all of which convened to revise or even entirely rewrite their state constitutions. In each and everyone of these convention, delegates were elected to the Convention. Conventions are ubiquitous in the corporate sector and include the State Conventions of the National Association of Realtors and the Annual Convention for the Cleaning Equipment Trade Association for just two of countless examples. Presidential nominating conventions are called by political parties in
4230-613: The United States. They have been a permanent feature of the government since its founding. After the Civil War, Congress passed the Reconstruction Acts , resulting in the states that once comprised the Confederate States of America being divided into military districts . These Acts of Congress mandated that the rebel states revise their constitutions by means of conventions of elected delegates, to include
4320-618: The ability to feel anything touched is called tactile anesthesia . Paresthesia is a sensation of tingling, pricking, or numbness of the skin that may result from nerve damage and may be permanent or temporary. Two types of somatosensory signals that are transduced by free nerve endings are pain and temperature. These two modalities use thermoreceptors and nociceptors to transduce temperature and pain stimuli, respectively. Temperature receptors are stimulated when local temperatures differ from body temperature . Some thermoreceptors are sensitive to just cold and others to just heat. Nociception
4410-404: The basis of the type of stimuli they transduce. The different types of functional receptor cell types are mechanoreceptors , photoreceptors , chemoreceptors ( osmoreceptor ), thermoreceptors , electroreceptors (in certain mammals and fish), and nociceptors . Physical stimuli, such as pressure and vibration, as well as the sensation of sound and body position (balance), are interpreted through
4500-415: The basis of three different criteria: cell type , position, and function. Receptors can be classified structurally on the basis of cell type and their position in relation to stimuli they sense. Receptors can further be classified functionally on the basis of the transduction of stimuli, or how the mechanical stimulus, light, or chemical changed the cell membrane potential . One way to classify receptors
4590-452: The body are called exteroceptors . Human external sensation is based on the sensory organs of the eyes , ears , skin , vestibular system , nose , and mouth , which contribute, respectively, to the sensory perceptions of vision , hearing , touch , balance , smell , and taste . Smell and taste are both responsible for identifying molecules and thus both are types of chemoreceptors . Both olfaction (smell) and gustation (taste) require
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#17327755942144680-546: The brain (cortices) are similarly dedicated to different sensory and perceptual tasks. More complex processing is accomplished across primary cortical regions that spread beyond the primary cortices. Every nerve, sensory or motor , has its own signal transmission speed. For example, nerves in the frog's legs have a 90 ft/s (99 km/h) signal transmission speed, while sensory nerves in humans, transmit sensory information at speeds between 165 ft/s (181 km/h) and 330 ft/s (362 km/h). Perceptual experience
4770-515: The brain, and/or from stroke ( infarcts in the brain). Temporary or permanent blindness can be caused by poisons or medications. People who are blind from degradation or damage to the visual cortex, but still have functional eyes, are actually capable of some level of vision and reaction to visual stimuli but not a conscious perception; this is known as blindsight . People with blindsight are usually not aware that they are reacting to visual sources, and instead just unconsciously adapt their behavior to
4860-432: The cells or structures that detect sensations. Stimuli in the environment activate specialized receptor cells in the peripheral nervous system . During transduction, physical stimulus is converted into action potential by receptors and transmitted towards the central nervous system for processing. Different types of stimuli are sensed by different types of receptor cells . Receptor cells can be classified into types on
4950-566: The constitution … adequate to the exigencies of the Union.” The Philadelphia Convention begin on May 14, 1787, and ended on September 17, with a proposal for a new Constitution for the union. With the guarantee of deliberative assemblies as a mechanism of redress under the First Amendment to the United States Constitution , conventions have proven fundamental in civic actions meant to secure fundamental rights and civil liberties; such as,
5040-660: The convention mode of ratification became enshrined within Article Seven of the United States Constitution . The Constitution was eventually adopted per the provisions of Article Seven as the Supreme Law of the Land through a series of Ratification Conventions that ultimately culminated on May 29, 1790, with the final ratification which was provided by the State of Rhode Island. Despite this long history of conventions in
5130-468: The convention's hosting company or by outside specialists. Most large cities will have a convention center dedicated to hosting such events. The term MICE (Meetings, Incentives, Conferencing, Exhibitions) is widely used in Asia as a description of the industry. The Convention ("C") is one of the most dynamic elements in the M.I.C.E. segment. The industry is generally regulated under the tourism sector . In
5220-524: The criterion, thus the signal is differentiated from the noise, the signal is sensed and perceived. Errors in signal detection can potentially lead to false positives and false negatives . The sensory criterion might be shifted based on the importance of the detecting the signal. Shifting of the criterion may influence the likelihood of false positives and false negatives. Subjective visual and auditory experiences appear to be similar across humans subjects. The same cannot be said about taste. For example, there
5310-453: The dark, it is most likely because your brain knows what color something is and is relying on that memory. There is some disagreement as to whether the visual system consists of one, two, or three submodalities. Neuroanatomists generally regard it as two submodalities, given that different receptors are responsible for the perception of color and brightness. Some argue that stereopsis , the perception of depth using both eyes, also constitutes
5400-401: The dermis of the skin are examples of neurons that have free nerve endings (1). Also located in the dermis of the skin are lamellated corpuscles , neurons with encapsulated nerve endings that respond to pressure and touch (2). The cells in the retina that respond to light stimuli are an example of a specialized receptor (3), a photoreceptor . A transmembrane protein receptor is a protein in
5490-425: The detection of a stimulus 50% of the time. Absolute threshold is measured by using a method called signal detection . This process involves presenting stimuli of varying intensities to a subject in order to determine the level at which the subject can reliably detect stimulation in a given sense. Differential threshold or just noticeable difference (JDS) is the smallest detectable difference between two stimuli, or
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#17327755942145580-403: The direction and location of vibrations picked up through the feet. Studies pertaining to audition started to increase in number towards the latter end of the nineteenth century. During this time, many laboratories in the United States began to create new models, diagrams, and instruments that all pertained to the ear. Auditory cognitive psychology is a branch of cognitive psychology that
5670-566: The elections of delegates for future ratification conventions. The Delegates of the Philadelphia Convention chose state conventions instead of state legislatures as the bodies to consider ratification of the Constitution. They broadly believed that ratification by means of conventions would better represent the will of the People and this process "would make the new federal Constitution superior to any specific legislature." Thus
5760-462: The environment can be either (1) a neuron that has a free nerve ending , with dendrites embedded in tissue that would receive a sensation; (2) a neuron that has an encapsulated ending in which the sensory nerve endings are encapsulated in connective tissue that enhances their sensitivity; or (3) a specialized receptor cell , which has distinct structural components that interpret a specific type of stimulus. The pain and temperature receptors in
5850-445: The environment that affect receptor cell membrane potentials. Other stimuli include the electromagnetic radiation from visible light. For humans, the only electromagnetic energy that is perceived by our eyes is visible light. Some other organisms have receptors that humans lack, such as the heat sensors of snakes, the ultraviolet light sensors of bees, or magnetic receptors in migratory birds. Receptor cells can be further categorized on
5940-541: The fabric of American government. There is an abundance of case law , historical precedent, examples of congressional intent , and Constitutional language, that demonstrate that the Federal Government of the United States formally recognizes conventions , wherever they may arise in constitutional law , as short-term deliberative assemblies . As such, they are subject to the rights of the People to enjoy free of governmental interference of any kind. Throughout
6030-416: The federal constitution, Congress mandated an election of delegates with the passage of an enabling act ; such as these notable examples: Among the most enigmatic of all conventions, Article Five of the United States Constitution provides for the calling of a constitutional convention , more commonly known as a Convention to propose amendments , whereby delegates are elected in equal fashion to Members of
6120-571: The former British colonies of North America had united to form a wartime confederation of states. One characterized by state representation in a weak and decentralized central government headed by the unicameral Congress of the Confederation , the precursor to the modern-day United States Senate . One convention of particular note during this time was held between September 11–14, 1786 in Annapolis, Maryland . The Annapolis Convention ,
6210-523: The history of the United States, conventions have served as a mechanism of self-governance , providing a vehicle to secure public rights through constitutions, or as a mechanism of redress to amend them. In fact, they have been instrumental to the nation's continued development into the representative democracy it is today. During the Confederation period under the Articles of Confederation ,
6300-501: The history of the United States. Article Five also provides that Congress may choose among two modes of ratification, either by means of state legislatures or by state conventions. To date the state convention ratification mode was used by Congress just once, to ratify the Twenty-first Amendment to the United States Constitution which ended prohibition . As a result, many states have statutory provisions providing for
6390-721: The industry's first spring trade show, the Amusement Operators Expo (AOE). The AOE ran for five years before merging with the Amusement Showcase International (ASI)–a spring trade show run by the American Amusement Machine Association (AAMA) in 1986. The AOE-ASI merger was renamed the American Coin Machine Exposition (ACME) and operated under this name for ten years. In 1997 the ACME was again renamed as
6480-481: The instrument, the listener, and the player of the instrument. Somatosensation is considered a general sense, as opposed to the special senses discussed in this section. Somatosensation is the group of sensory modalities that are associated with touch and interoception. The modalities of somatosensation include pressure , vibration , light touch, tickle , itch , temperature , pain , kinesthesia . Somatosensation , also called tactition (adjectival form: tactile)
6570-512: The lateral aspect of the head is known as the auricle . At the end of the auditory canal is the tympanic membrane, or ear drum , which vibrates after it is struck by sound waves. The auricle, ear canal, and tympanic membrane are often referred to as the external ear . The middle ear consists of a space spanned by three small bones called the ossicles . The three ossicles are the malleus , incus , and stapes , which are Latin names that roughly translate to hammer, anvil, and stirrup. The malleus
6660-438: The membrane, and can generate an action potential or a graded potential in the sensory neurons . A third classification of receptors is by how the receptor transduces stimuli into membrane potential changes. Stimuli are of three general types. Some stimuli are ions and macromolecules that affect transmembrane receptor proteins when these chemicals diffuse across the cell membrane. Some stimuli are physical variations in
6750-408: The molecular level, visual stimuli cause changes in the photopigment molecule that lead to changes in membrane potential of the photoreceptor cell. A single unit of light is called a photon , which is described in physics as a packet of energy with properties of both a particle and a wave. The energy of a photon is represented by its wavelength , with each wavelength of visible light corresponding to
6840-437: The movement of hair at the surface of the skin, such as when an insect may be walking along the skin . Stretching of the skin is transduced by stretch receptors known as bulbous corpuscles . Bulbous corpuscles are also known as Ruffini corpuscles, or type II cutaneous mechanoreceptors. The heat receptors are sensitive to infrared radiation and can occur in specialized organs, for instance in pit vipers . The thermoceptors in
6930-403: The muscles of the pharynx contract during swallowing or yawning . Mechanoreceptors turn motion into electrical nerve pulses, which are located in the inner ear. Since sound is vibration, propagating through a medium such as air, the detection of these vibrations, that is the sense of the hearing, is a mechanical sense because these vibrations are mechanically conducted from the eardrum through
7020-519: The organization's common issues. This also applies to a political convention , though in modern times the common issues are limited to selecting a party candidate or party chairman. In this technical sense , a congress , when it consists of representatives, is a convention. The British House of Commons is a convention, as are most other houses of a modern representative legislature . The National Convention or just "Convention" in France comprised
7110-634: The profession. Such conventions are generally organized by societies or communities dedicated to promotion of the topic of interest. Fan conventions usually feature displays, shows, and sales based on pop culture and guest celebrities. Science fiction conventions traditionally partake of the nature of both professional conventions and fan conventions, with the balance varying from one to another. Conventions also exist for various hobbies, such as gaming or model railroads . Conventions are often planned and coordinated, often in exacting detail, by professional meeting and convention planners , either by staff of
7200-426: The purpose of exercising a federal function under authority deriving directly from the United States Constitution. Conversely, state legislatures only exercise federal functions when they apply to Congress for a convention to propose amendments or when they call a convention to ratify a proposed amendment submitted to the states by Congress. Otherwise conventions called and convened under authority deriving directly from
7290-416: The ratification of the thirteenth , fourteenth , and fifteenth amendments to the United States Constitution. Congress has also frequently employed conventions for the admission of new states to the Union under Article Four of the United States Constitution . In all, a total of thirty-one states were admitted to the union in this manner. In each and every case, under the authority derived directly from
7380-714: The sensory organs of the eyes , ears , skin , nose , mouth and the vestibular system . Internal sensation detects stimuli from internal organs and tissues. Internal senses possessed by humans include spatial orientation , proprioception (body position) and nociception (pain). Further internal senses lead to signals such as hunger , thirst , suffocation , and nausea , or different involuntary behaviors, such as vomiting . Some animals are able to detect electrical and magnetic fields , air moisture , or polarized light , while others sense and perceive through alternative systems, such as echolocation . Sensory modalities or sub modalities are different ways sensory information
7470-482: The smallest difference in stimuli that can be judged to be different from each other. Weber's Law is an empirical law that states that the difference threshold is a constant fraction of the comparison stimulus. According to Weber's Law, bigger stimuli require larger differences to be noticed. Magnitude estimation is a psychophysical method in which subjects assign perceived values of given stimuli. The relationship between stimulus intensity and perceptive intensity
7560-465: The stimulus. On February 14, 2013, researchers developed a neural implant that gives rats the ability to sense infrared light which for the first time provides living creatures with new abilities, instead of simply replacing or augmenting existing abilities. According to Gestalt Psychology, people perceive the whole of something even if it is not there. The Gestalt's Law of Organization states that people have seven factors that help to group what
7650-423: The technical sense, a convention is a meeting of delegates or representatives. The 1947 Newfoundland National Convention is a classic example of a state-sponsored political convention. More often, organizations made up of smaller units, chapters, or lodges, such as labor unions , honorary societies , and fraternities and sororities , meet as a whole in convention by sending delegates of the units to deliberate on
7740-452: The tendency humans have to categorize objects according to past experiences under certain circumstances. If two objects are usually perceived together or within close proximity of each other the Law of Past Experience is usually seen. Hearing, or audition, is the transduction of sound waves into a neural signal that is made possible by the structures of the ear . The large, fleshy structure on
7830-587: The transduction of chemical stimuli into electrical potentials. The visual system, or sense of sight, is based on the transduction of light stimuli received through the eyes and contributes to visual perception . The visual system detects light on photoreceptors in the retina of each eye that generates electrical nerve impulses for the perception of varying colors and brightness. There are two types of photoreceptors: rods and cones . Rods are very sensitive to light but do not distinguish colors. Cones distinguish colors but are less sensitive to dim light. At
7920-416: The wavelength scale. The three types of cone opsins , being sensitive to different wavelengths of light, provide us with color vision. By comparing the activity of the three different cones, the brain can extract color information from visual stimuli. For example, a bright blue light that has a wavelength of approximately 450 nm would activate the "red" cones minimally, the "green" cones marginally, and
8010-413: The way that information is encoded, which is similar to the idea of transduction . The main sensory modalities can be described on the basis of how each is transduced. Listing all the different sensory modalities, which can number as many as 17, involves separating the major senses into more specific categories, or submodalities, of the larger sense. An individual sensory modality represents the sensation of
8100-532: Was convened primarily to address issues of commerce between the states, but the agenda quickly became focused upon a wide range of deficiencies posed by the current frame of government. The convention ended with a resolution by Alexander Hamilton calling for a convention to amend the Articles of Confederation. Following Hamilton's suggestion, the Confederate Congress called a convention “to render
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