Forum Niches: A - Z

Acoustic Guitar 
An acoustic guitar is a musical instrument in the guitar family. Its strings vibrate a sound board on a resonant body to project a sound wave through the air. The original, general term for this stringed instrument is guitar, and the retronym 'acoustic guitar' distinguishes it from an electric guitar, which relies on electronic amplification. Typically, a guitar's body is a sound box, of which the top side serves as a sound board that enhances the vibration sounds of the strings. In standard tuning the guitar's six strings are tuned E₂ A₂ D₃ G₃ B₃ E₄. Guitar strings may be plucked individually with a pick or fingertip, or strummed to play chords. Plucking a string causes it to vibrate at a fundamental pitch determined by the string's length, mass, and tension. The string causes the soundboard and the air enclosed by the sound box to vibrate. As these have their own resonances, they amplify some overtones more strongly than others, affecting the timbre of the resulting sound.

Body Kit 
A body kit or bodykit is a set of modified body parts or additional components that install on a stock car. Typically composed of front and rear bumpers, side skirts, spoilers, bonnets, and sometimes front and rear side guards and roof scoops. There are many companies that offer alternatives to the original factory appearance of the vehicle. Body kit components are designed to complement each other and work together as a complete design. Despite this, the 'mix and match' approach is often seen on cars, where the front of one body kit will be matched with the rear of another, for example. Automotive body kits are usually constructed of either fiberglass, polyurethane, or in some cases carbon fiber. Fiberglass is cheap and widely available, although it can crack upon impact. Polyurethane is popular because it is flexible and thus more resistant to damage. Carbon fiber body kits are rare, due to the cost of the materials, and are rarely seen on street-legal vehicles.

Car Audio 
Vehicle audio is equipment installed in a car or other vehicle to provide in-car entertainment and information for the vehicle occupants. Until the 1950s it consisted of a simple AM radio. Additions since then have included FM radio, 8-track tape players, cassette players, record players, CD players, DVD players, Blu-ray players, navigation systems, Bluetooth telephone integration, and smartphone controllers like CarPlay and Android Auto. Once controlled from the dashboard with a few buttons, they can now be controlled by steering wheel controls and voice commands. Initially implemented for listening to music and radio, vehicle audio is now part of car telematics, telecommunication, in-vehicle security, handsfree calling, navigation, and remote diagnostics systems. The same loudspeakers may also be used to minimize road and engine noise with active noise control, or they may be used to augment engine sounds, for instance making a smaller engine sound bigger.

Digital Camera 
A digital camera is a camera that captures photographs in digital memory. Most cameras produced today are digital, and while there are still dedicated digital cameras, many more cameras are now incorporated into mobile devices like smartphones, which can, among many other purposes, use their cameras to initiate live video-telephony and directly edit and upload image to others. However, high-end, high-definition dedicated cameras are still commonly used by professionals and those who desire to take higher-quality photographs. Digital and digital movie cameras share an optical system, typically using a lens with a variable diaphragm to focus light onto an image pickup device. The diaphragm and shutter admit the correct amount of light to the image, just as with film but the image pickup device is electronic rather than chemical. However, unlike film cameras, digital cameras can display images on a screen immediately after being recorded, and store and delete images from memory.

Electronic Cigarette 
An electronic cigarette is an electronic device that simulates tobacco smoking. It consists of an atomizer, a power source such as a battery, and a container such as a cartridge or tank. Instead of smoke, the user inhales vapor. As such, using an e-cigarette is often called vaping. The atomizer is a heating element that atomizes a liquid solution called e-liquid. E-cigarettes are activated by taking a puff or pressing a button. Some look like traditional cigarettes, and most versions are reusable. E-cigarettes create an aerosol, commonly called vapor, made of particulate matter. The vapor typically contains propylene glycol, glycerin, nicotine, flavors, and traces of nitrosamines, other toxicants, carcinogens, heavy metals, and metal nanoparticles. Its exact composition varies, and depends on several factors including user behavior. The health effects of electronic cigarettes remain uncertain, but they are likely less harmful than smoking tobacco.

Flea Market 
A flea market is a type of street market that provides space for vendors to sell previously-owned merchandise. This type of market is often seasonal. However, in recent years there has been the development of 'formal' and 'casual' markets which divides a fixed-style market with long-term leases and a seasonal-style market with short-term leases. Consistently, there tends to be an emphasis on sustainable consumption whereby items such as used goods, collectibles, antiques and vintage clothing can be purchased. Flea market vending is distinguished from street vending in that the market alone, and not any other public attraction, brings in buyers. There are a variety of vendors: some part-time who consider their work at flea markets a hobby due to their possession of an alternative job; full-time vendors who dedicate all their time to their stalls and collection of merchandise and rely solely on the profits made at the market.

German Shepherd 
The German Shepherd is a breed of medium to large-sized working dog that originated in Germany. According to the FCI, the breed's English language name is German Shepherd Dog. The breed was officially known as the Alsatian Wolf Dog in the UK from after the First World War until 1977 when its name was changed back to German Shepherd. Despite its wolf-like appearance, the German Shepherd is a relatively modern breed of dog, with their origin dating to 1899. As a herding dog, German Shepherds are working dogs developed originally for herding sheep. Since that time, however, because of their strength, intelligence, trainability, and obedience, German Shepherds around the world are often the preferred breed for many types of work, including disability assistance, search-and-rescue, police and military roles and acting. The German Shepherd is the second-most registered breed by the American Kennel Club and seventh-most registered breed by The Kennel Club in the United Kingdom.

Hair Loss 
Hair loss, also known as alopecia or baldness, refers to a loss of hair from part of the head or body. Typically at least the head is involved. The severity of hair loss can vary from a small area to the entire body. Inflammation or scarring is not usually present. Hair loss in some people causes psychological distress. Common types include male- or female-pattern hair loss, alopecia areata, and a thinning of hair known as telogen effluvium. The cause of male-pattern hair loss is a combination of genetics and male hormones; the cause of female pattern hair loss is unclear; the cause of alopecia areata is autoimmune; and the cause of telogen effluvium is typically a physically or psychologically stressful event. Telogen effluvium is very common following pregnancy. Less common causes of hair loss without inflammation or scarring include the pulling out of hair, certain medications including chemotherapy, HIV/AIDS, hypothyroidism, and malnutrition including iron deficiency.

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Job Interview 
A job interview is an interview consisting of a conversation between a job applicant and a representative of an employer which is conducted to assess whether the applicant should be hired. Interviews are one of the most popularly used devices for employee selection. Interviews vary in the extent to which the questions are structured, from a totally unstructured and free-wheeling conversation, to a structured interview in which an applicant is asked a predetermined list of questions in a specified order; structured interviews are usually more accurate predictors of which applicants will make suitable employees, according to research studies. A job interview typically precedes the hiring decision. The interview is usually preceded by the evaluation of submitted résumés from interested candidates, possibly by examining job applications or reading many resumes. Next, after this screening, a small number of candidates for interviews is selected.

Keto Diet 
The ketogenic diet is a high-fat, adequate-protein, low-carbohydrate diet that in medicine is used mainly to treat hard-to-control epilepsy in children. The diet forces the body to burn fats rather than carbohydrates. Normally carbohydrates in food are converted into glucose, which is then transported around the body and is important in fueling brain function. But if little carbohydrate remains in the diet, the liver converts fat into fatty acids and ketone bodies, the latter passing into the brain and replacing glucose as an energy source. An elevated level of ketone bodies in the blood eventually lowers the frequency of epileptic seizures. Around half of children and young people with epilepsy who have tried some form of this diet saw the number of seizures drop by at least half, and the effect persists after discontinuing the diet.