Some weapons, such as the AR-15 / M16, do not have a piston, instead using a system of direct impingement in which the gases operate the bolt carrier by acting directly on it.

Some people might consider them loud or very loud because the weight-modified valve operates similarly to the piston in a steam engine.

Some engine tuners believe that this will maximize the exposure of the fuel-air mixture to the spark, also ensuring that every combustion chamber is an even in layout and therefore result in better ignition ; others, however, believe that this is useful only to keep the ground electrode out of the way of the piston in ultra-high-compression engines if clearance is insufficient.

Some potential solutions to increase fuel efficiency to meet new mandates include firing after the piston is farthest from the crankshaft, known as top dead centre, and applying the Miller cycle.

Some simpler designs relied on these rapidly moving parts to splash and lubricate the contacting surfaces between the piston rings and interior surfaces of the cylinders.

Some designs will cause the piston to " dwell " at either extreme of travel.

Some smaller corps had straight bugles even into the 1960s, and there are still some corps, bands and other groups who continue to use straight bugles or G-D piston bugles to this day, as entire horn lines or as bugle sections.

Some of the work extracted by the piston / cylinder is used to drive the compressor through a crankshaft arrangement.

Some engines use a dished piston and in this case the combustion chamber can be considered as partly within the cylinder.

Some airless pumps have a diaphragm instead of a piston, but both types have inlet and outlet valves.

Some direct drive piston pumps are driven by a gasoline engine with pressure control via an electric clutch.

Some cartridge-based fountain pens can be fitted with " converters ", which are separate piston / suction reservoirs of the same dimensions as the pen's usual refill cartridge ; these allow the pen to refill from bottled ink.

Some line vang systems incorporate a piston to provide the topping lift force and to damp oscillations.

Some engines also use cast iron crankshafts for low output versions while the more expensive high output version use forged steel.

Some 19th-century or earlier experimental engines used external flames, exposed by valves, for ignition, but this becomes less attractive with increasing compression.

Some layout engines such as Trident / MSHTML and Presto are associated primarily or exclusively with a particular browser such as Internet Explorer and Opera respectively.

Some engines convert heat from noncombustive processes into mechanical work, for example a nuclear power plant uses the heat from the nuclear reaction to produce steam and drive a steam engine, or a gas turbine in a rocket engine may be driven by decomposing hydrogen peroxide.

Some engines ( air or water cooled ) also have an oil cooler.

" Some unusual engines ", 1975 The Institution of Mechanical Engineers, London.

Some specialised search engines such as Google Scholar offer a way to facilitate searching for academic resources such as journal articles and research papers.

Some aviation engines as well as some early luxury cars have had dual-plugged systems with one set of plugs fired by a magneto, and the other set wired to a coil, dynamo, and battery circuit.

Some real-time software 3D engines based on ray tracing have been developed by hobbyist demo programmers since the late 1990s.

Some engines were equipped with a switch that cut out only some rather than all of the cylinders to ensure that the engine kept running and did not oil up.

Some search engines apply improvements to search queries to increase the likelihood of providing a quality set of items through a process known as query expansion.

Some SSTO vehicles use the same engine for all altitudes, which is a problem for traditional engines with a bell-shaped nozzle.

Some SSTO vehicles simply use very high pressure engines which permit high ratios to be used from ground level.

Some designs for SSTO attempt to use airbreathing jet engines that collect oxidiser and reaction mass from the atmosphere to reduce the take-off weight of the vehicle.

Some commercial aircraft with turboprop engines include the Bombardier Dash 8, ATR 42, ATR 72, BAe Jetstream 31, Embraer EMB 120 Brasilia, Fairchild Swearingen Metroliner, Saab 340 and 2000, Xian MA60, Xian MA600, and Xian MA700, Fokker 27, 50 and 60.

Some of the most popular and successful online sites or search engines of the 2000s included Google, Yahoo !, Wikipedia, Amazon, eBay, MySpace, Facebook, Twitter, and YouTube.

Some search engines, like Yahoo, use automated processes to detect soft 404s.

Some 100-200 engines completed their mission on Soviet and Russian satellites until the late 1990s.

Some are carbureted, usually the smaller engines.

Some of the Shuttle systems integrated in the simulation are the main propulsion system, main engines, solid rocket boosters, ground liquid hydrogen and liquid oxygen, external tank, flight controls, navigation, and avionics.

Some search engines give a higher rank to results where the keyword searched for appears in the URL.

Some search engines like Vivísimo try to group found web pages into automated categories in an attempt to show various genres the search hits might fit.

Some older biplane designs, such as the Grumman Ag Cat and the aforementioned An-2 ( in the form of the An-3 ) are available in upgraded versions with turboprop engines.

Some small propeller-driven aircraft engines still use the updraft carburetor design.

Some chaps that know an area well can make their way by landmarks, a tree here, a wash here, a boulder there.

Some of the poetic cadence of the older version certainly is lost in the newer one, but almost anyone, with a fair knowledge of the English language, can understand the meaning, without the necessity of interpretation by a Biblical scholar.

Some of the most dramatic successes of Communism in winning local support can be traced to the identification -- correct or not -- of Communist regimes with personal honesty and pro-Western regimes with corruption.

Some limitations of one element can be compensated for by a capability of another.

Some women can sit and sew, crochet, tat or knit by the hour, and look calm and relaxed and turn out beautiful work.

Some people can carve most anything out of a piece of wood.

Some turnpikes have not been in full operation long enough to prove what they can do.

Some interfaith tensions are not occasioned by theological differences at all, but by the need of men to have persons they can blame, distrust, denounce, and even hate.

`` Some can be lonely in a crowd '', Nogol said elaborately.

Some argue that no act of sharing, helping or sacrificing can be described as truly altruistic, as the actor may receive an intrinsic reward in the form of personal gratification.

Some amphibian toxins can be lethal to humans while others have little effect.

Some appellate courts, particularly supreme courts, have the power of discretionary review, meaning that they can decide whether they will hear an appeal brought in a particular case.

Some may suggest that it is probably advisable to use mouthwash at least an hour after brushing with toothpaste when the toothpaste contains sodium lauryl sulfate, since the anionic compounds in the SLS toothpaste can deactivate cationic agents present in the mouthrinse.

Some abugidas use a special symbol to suppress the inherent vowel so that the consonant alone can be properly represented.

Some axons can extend up to one meter or more while others stretch to as little as one millimeter ( inhibitory interneurons ).

Some details were changed slightly to allow more player choice-for example, players can be full Trump Artists without having walked the Pattern or the Logrus, which Merlin says is impossible ; and players ' psychic abilities are far greater than those shown in the books.

Some signs that are created with a 1 handshape can also be made using an L or a 5 handshape ( open handshape ).

Some opcodes require one or more operands as part of the instruction, and most assemblers can take labels and symbols as operands to represent addresses and constants, instead of hard coding them into the program.

Some distinctive accents can be found on the East Coast ( for example, in eastern New England and New York City ) partly because these areas were in close contact with England and imitated prestigious varieties of British English at a time when these were undergoing changes.

Some arguments from moral order suggest that morality is based on rationality and that this can only be the case if there is a moral order in the universe.

Some believe that Luke ’ s gospel can be seen to mirror the Jewish apologetic literature of the time which served to “ defend Jews against misunderstanding and persecution .” Acts is said to be a:

Some scholars believe that the apologetic view of Luke ’ s work is overemphasized and that it should not be regarded as a “ major aim of the Lucan writings .” While Munck believes that purpose of Luke ’ s work is not that clear-cut and sympathizes with other claims, he believes that Luke ’ s work can function as an apology only in the sense that it “ presents a defense of Christianity and Paul ” and may serve to “ clarify the position of Christianity within Jewry and within the Roman Empire .” Pervo disagrees that Luke ’ s work is an apology and even that it could possibly be addressed to Rome because he believes that “ Luke and Acts speak to insiders, believers in Jesus .” Freedman believes that Luke is writing an apology but that his goal is “ not to defend the Christian movement as such but to defend God ’ s ways in history .”

Some high performance permanent PSAs exhibit high adhesion values and can support kilograms of weight per square centimeter of contact area, even at elevated temperature.

Some remixes, particularly in dance music, can also be considered re-arrangements in this style.

Some people, however, can continue to lose potassium while on an ACE inhibitor.