ratio of word probabilities predicted from brain for knife and spoon

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knife

spoon

top 10 words in brain distribution (in article):
iron blade steel handle cut metal tool nail hammer bronze
top 10 words in brain distribution (in article):
steel head handle cut metal hammer century bronze knife shape
top 10 words in brain distribution (not in article):
head hair whip breast design size sword century bra rope
top 10 words in brain distribution (not in article):
iron blade hair tool nail hand whip breast design size
times more probable under knife 30 20 10 6 4 2.5 1.25 1 1.25 2.5 4 6 10 20 30 times more probable under spoon
(words not in the model)
A knife'" is a handheld sharp-edged instrument consisting of a handle attached to a blade that is used for cutting. Knives were used at least two-and-a-half million years ago, as evidenced by the Oldowan tools. History. The earliest knives were shaped by knapping (percussive flaking) of rock, particularly harder rocks such as obsidian and flint. During the Paleolithic era Homo habilis likely made similar tools out of wood, bone, and similar perishable materials that have not survived. As recent as five thousand years ago, as advances in metallurgy progressed, stone, wood, and bone blades were gradually succeeded by copper, bronze, iron, and eventually steel. The first metal (copper) knives were symmetrical double edged daggers, which copied the earlier flint daggers. In Europe the first single edged knives appeared during the middle bronze age. Modern knives may be made from many different materials such as alloy tool steels, carbon fiber, ceramics, and titanium. Materials and construction. Today, knives come in many forms but can be generally categorized between two broad types: fixed blade knives and folding, or pocket, knives. Modern knives consist of a "blade" (1'") and "handle" (2'"). The blade edge can be plain or serrated or a combination of both. The handle, used to grip and manipulate the blade safely, may include the "tang", a portion of the blade that extends into the handle. Knives are made with partial (extending part way into the handle) and full (extending the full length of the handle, often visible on top and bottom) tangs. The handle can also include a bolster, which is a piece of material used to balance the knife, usually brass or other metal, at the front of the handle where it meets the blade. The blade consists of the "point" (3'"), the end of the knife used for piercing, the "edge" (4'"), the cutting surface of the knife extending from the point to the heel, the "grind" (5'"), the "cross-section" shape of the blade, the "spine", (6'"), the top, thicker portion of the blade, the "fuller" (7'"), the groove added to lighten the blade, and the "ricasso" (8'"), the thick portion of the blade joining the blade and the handle. The "guard" (9'") is a barrier between the blade and the handle which protects the hand from an opponent, or the blade of the knife itself. A "choil", where the blade is unsharpened and possibly indented as it meets the handle, may be used to prevent scratches to the handle when sharpening or as a forward-finger grip. The end of the handle, or "butt" (10'"), may allow a "lanyard" (11'"), used to secure the knife to the wrist, or a portion of the tang to protrude as a striking surface for pounding or glass breaking. Blade. Knife blades can be manufactured from a variety of materials, each of which has advantages and disadvantages. Carbon steel, an alloy of iron and carbon, can be very sharp, hold its edge well, and remain easy to sharpen, but is vulnerable to rust and stains. Stainless steel is an alloy of iron, chromium, possibly nickel, and molybdenum, with only a small amount of carbon. It is not able to take quite as sharp an edge as carbon steel, but is highly resistant to corrosion. High carbon stainless steel is stainless steel with a higher amount of carbon, intended to incorporate the better attributes of carbon steel and stainless steel. High carbon stainless steel blades do not discolor or stain, and maintain a sharp edge. Laminate blades use multiple metals to create a layered sandwich, combining the attributes of both. For example, a harder, more brittle steel may be sandwiched between an outer layer of softer, tougher, stainless steel to reduce vulnerability to corrosion. In this case, however, the part most affected by corrosion, the edge, is still vulnerable. Pattern-welding is similar to laminate construction. Layers of different steel types are welded together, but then the stock is manipulated to create patterns in the steel. Titanium is metal that has a better strength-to-weight ratio, is more wear resistant, and more flexible than steel. Although less hard and unable to take as sharp an edge, carbides in the titanium alloy allow them to be heat-treated to a sufficient hardness. Ceramic blades are hard, brittle, and lightweight: they may maintain a sharp edge for years with no maintenance at all. They are immune to common corrosion, and can only be sharpened on silicon carbide sandpaper and some grinding wheels. Plastic blades are not especially sharp and typically serrated. They are often disposable. Steel blades are commonly shaped by forging or stock removal. Forged blades are made by heating a single piece of steel, then shaping the metal while hot using a hammer or press. Stock removal blades are shaped by grinding and removing metal. With both methods, after shaping, the steel must be heat treated. This involves heating the steel above its critical point, then quenching the blade to harden it. After hardening, the blade is tempered to remove stresses and make the blade tougher. Mass manufactured kitchen cutlery uses both the forging and stock removal processes. Forging tends to be reserved for manufacturers' more expensive product lines, and can often be distinguished from stock removal product lines by the presence of an integral bolster, though integral bolsters can be crafted through either shaping method. Knives are sharpened in various ways. Flat ground blades have a profile that tapers from the thick spine to the sharp edge in a straight or convex line. Seen in cross section, the blade would form a long, thin triangle, or where the taper does not extend to the back of the blade, a long thin rectangle with one peaked side. Hollow ground blades have concave, beveled edges. The resulting blade has a thinner edge, so it may have better cutting ability for shallow cuts, but it is lighter and less durable than flat ground blades and will tend to bind in deep cuts. Serrated blade knives have a wavy, scalloped or saw-like blade. Serrated blades are more well suited for tasks that require aggressive 'sawing' motions, whereas plain edge blades are better suited for tasks that require push-through cuts (e.g., shaving, chopping). Fixed blade features. A fixed blade knife does not fold or slide, and is typically stronger due to the tang, the extension of the blade into the handle, and lack of moving parts. Folding blade features. A folding knife connects the blade to the handle through a pivot, allowing the blade to fold into the handle. To prevent injury to the knife user through the blade accidentally closing on the user's hand, folding knives typically have a locking mechanism. Different locking mechanisms are favored by various individuals for reasons such as perceived strength (lock safety), legality, and ease of use. Another prominent feature on many folding knives is the opening mechanism. Traditional pocket knives and Swiss Army Knives commonly employ the nail nick, while modern folding knives more often use a stud, hole, disk, or "flipper" located on the blade, all which have the benefit of allowing the user to open the knife with one hand. "Automatic" or "switchblade" knives open using the stored energy from a spring that is released when the user presses a button or lever or other actuator built into the handle of the knife. Automatic knives are popular amongst law enforcement and military users for their ease of rapid deployment and their ability to be opened using only one hand. Automatic knives are severely restricted by law in most states. Increasingly common are "assisted opening" knives which use springs to propel the blade once the user has moved it past a certain angle. These differ from automatic or switchblade knives in that the blade is not released by means of a button or catch on the handle; rather, the blade itself is the actuator. Most assisted openers use flippers as their opening mechanism. Assisted opening knives can be as fast or faster than automatic knives to deploy. Sliding blade features. A sliding knife is a knife which can be opened by sliding the knife blade out the front of the handle. One method of opening is where the blade exits out the front of the handle point-first and then is locked into place (an example of the this is the gravity knife). Another form is a O-T-F (out-the-front) switchblade, which only requires the push of a button or spring to cause the blade to slide out of the handle, and lock into place. To retract the blade back into the handle, a release lever or button, usually the same control as to open, is pressed. A very common form of sliding knife is the sliding utility knife (commonly known as a stanley knife). Handle. The handles of knives can be made from a number of different materials, each of which has advantages and disadvantages. Handles are produced in a wide variety of shapes and styles. Handles are often textured to enhance grip. More exotic materials usually only seen on art or ceremonial knives include: Stone, bone, mammoth tooth, mammoth ivory, oosic (walrus penis bone), walrus tusk, A spoon'" is a utensil consisting of a small shallow bowl, oval or round, at the end of a handle. A type of cutlery (usually called flatware in the United States), especially as part of a place setting, it is used primarily for serving and eating liquid or semisolid food (sometimes called "spoon-meat"), and solid foods such as rice and cereal which cannot easily be lifted with a fork. Spoons are also used in food preparation to measure, mix, stir and toss ingredients. They can be made from metal (notably flat silver or silverware, plated or solid), wood or plastic. Abbreviation: sp. History. The earliest northern European spoon would seem to have been a chip or splinter of wood; Greek references point to the early and natural use of shells, such as those that are still used by primitive peoples. Ancient Indian texts also refer to the use of spoons. For example, the Rigveda refers to spoons during a passage describing the reflection of light as it "touches the spoon's mouth" (RV 8.43.10). Preserved examples of various forms of spoons used by the ancient Egyptians include those composed of ivory, flint, slate and wood; many of them carved with religious symbols. The spoons of the Greeks and Romans were chiefly made of bronze and silver and the handle usually takes the form of a spike or pointed stem. There are many examples in the British Museum from which the forms of the various types can be ascertained, the chief points of difference being found in the junction of the bowl with the handle. Middle Ages spoons at Chillon Castel Medieval spoons for domestic use were commonly made of cow horn or wood, but brass, pewter, and latten spoons appear to have been common in about the 15th century. The full descriptions and entries relating to silver spoons in the inventories of the royal and other households point to their special value and rarity. The earliest English reference appears to be in a will of 1259. In the wardrobe accounts of Edward I for the year 1300 some gold and silver spoons marked with the "fleur-de-lis", the Paris mark, are mentioned. One of the most interesting medieval spoons is the coronation spoon used in the anointing of the English sovereign. The sets of Apostle Spoons, popular as christening presents in Tudor times, the handles of which terminate in heads or busts of the apostles, are a special form to which antiquarian interest attaches. The earlier English spoon-handles terminate in an acorn, plain knob or a diamond; at the end of the 16th century, the baluster and seal ending becomes common, the bowl being fig-shaped. During The Restoration, the handle becomes broad and flat, the bowl is broad and oval and the termination is cut into the shape known as the hind's foot. In the first quarter of the 18th century, the bowl becomes narrow and elliptical, with a tongue or rat's tail down the back, and the handle is turned up at the end. The modern form, with the tip of the bowl narrower than the base and the rounded end of the handle turned down, came into use about 1760. Types and uses. Spoons are used primarily for eating liquid or semi-liquid foods, such as soup, stew or ice cream, and very small or powdery solid items which cannot be easily lifted with a fork, such as rice, sugar, cereals and green peas. In Southeast Asia, spoons are the primary utensil used for eating; forks are used only to push food onto the spoon. Spoons are also widely used in cooking and serving. In baking, batter is usually thin enough to pour or drop from a spoon; a mixture of such consistency is sometimes called "drop batter”. Rolled dough dropped from a spoon to a cookie sheet can be made into rock cakes and other cookies, while johnnycake may be prepared by dropping spoonfuls of cornmeal onto a hot greased griddle. A spoon is similarly useful in processing jelly, sugar and syrup. A test sample of jelly taken from a boiling mass may be allowed to slip from a spoon in a sheet, in a step called "sheeting". At the "crack" stage, syrup from boiling sugar may be dripped from a spoon, causing it to break with a snap when chilled. When boiled to 240°F. and poured from a spoon, sugar forms a filament, or "thread". Hot syrup is said to "pearl" when it forms such a long thread without breaking when dropped from a spoon. Used for stirring, a spoon is passed through a substance with a continued circular movement for the purpose of mixing, blending, dissolving, cooling, or preventing sticking of the ingredients. Mixed drinks may be "muddled" by working a spoon to crush and mix ingredients such as mint and sugar on the bottom of a glass or mixer. Spoons are employed for mixing certain kinds of powder into water to make a sweet or nutritious drink. A spoon may also be employed to toss ingredients by mixing them lightly until they are well coated with a dressing. A spoonful'"—the amount of material a spoon contains or can contain—is used as a standard unit of measure for volume in cooking, where it normally signifies a "'teaspoonful'". It is abbreviated "coch" or "cochl", from Latin "cochleare". "Teaspoonful" is often used in a similar way to describe the dosage for over the counter medicines. Dessert spoonful and tablespoonful may also be found in drink and food recipes. A teaspoon holds about 5ml and a tablespoon about 15ml. For storage, spoons and knives were sometimes placed in paired "knife boxes", which were often ornate wooden containers with sloping top, used especially during the 18th century. On the table, an ornamental utensil called a "nef", shaped like a ship, might hold a napkin, knife and spoon. The souvenir spoon generally exists solely as a decorative object commemorating an event, place, or special date. Spoons can also be used as a musical instrument. To "spoon-feed" oneself or another can simply mean to feed by means of a spoon. Metaphorically, however, it often means to present something to a person or group so thoroughly or wholeheartedly as to preclude the need of independent thought, initiative or self-reliance on the part of the recipient; or to present information in a slanted version, with the intent to preclude questioning or revision. Someone who accepts passively what has been offered in this way is said to have been spoon-fed. Manufacture. For machine-made spoons, the basic shape is cut out from a sheet of sterling silver, nickel silver alloy or stainless steel. The bowl is cross rolled between two pressurized rollers to produce a thinner section. The handle section is also rolled to produce the width needed for the top end. The blank is then cropped to the required shape, and two dies are used to apply the pattern to the blank. The fash is then removed using a lynisher, and the bowl is formed between two dies and bent. To make a spoon the traditional by way of handforging, a bar of silver is marked up to the correct proportions for the bowl and handle. It is then heated until red hot and held in tongs and using the hammer and anvil, beaten into shape. The tip of the bar is pointed to form the tip of the bowl, then hammered to form the bowl. If a heel is to be added, a section down the centre is left thicker. The edges of the bowl and the tip of the spoon are left thicker as this is where most of the thickness is needed. The handle is then started and hammered out to length going from thick at the neck and gradually tapering down in thickness giving a balanced feel. During this process the piece becomes very hard and has to be annealed several times, then worked again until the final shape is achieved. The bowl is filed to shape, often using a metal template. The bowl is then formed using a tin cake and spoon stake. The molten tin is poured around the spoon stake and left to harden. The handle is then bent down to 45 degrees, and the spoon is hammered into the tin using the spoon stake and a heavy hammer, to form the bowl. The bend in the handle is then adjusted to match the other spoons in the set and so it sits correctly on the table. The bowl is then filed level, a process called striking off. The surfaces are filed, first with a rough file to remove the fire stain from the surface, then with a smooth file. It is then buffed to remove any file marks and fire stain from inside the bowl and is polished to the desired finish. During the hand-forging process the spoon will have been hit with a hammer over 300 hundred times. A machine made spoon receives one or two blows from a press. Bibliography. Features broad array of collectible spoons from around the world, with values. Contains historical information and photos of antique collectible spoons.