Since the 1950s, many blues harmonica players have amplified their instrument with microphones and tube amplifiers.

Since the charge gradually leaked away, it was necessary to scan the tube periodically and rewrite every dot ( similar to the memory refresh cycles of DRAM in modern systems ).

Since kinescopes were able to produce a negative picture, direct positive recordings could be made by simply photographing a negative image on the kinescope tube.

Since each of the guns was aimed at the hole from a slightly different angle, the spots of phosphor on the tube could be separated slightly to prevent overlap.

Since there is no reflector, only one high-voltage supply is necessary to cause the tube to oscillate, the voltage must be adjusted to a particular value.

Since the tubing is not a part of the needle, the blood goes through the needle directly into the tube.

Since a patient has to be put into the center of a magnet to optimize imaging, the patient finds themselves in a narrow tube for an extended period of time.

Since 2005, there are also inflatable snow globes which blow tiny styrofoam beads around on the inside, the blower's air jet picking them up and through a tube to the top, where they fall down inside the clear vinyl front.

Since the advent of microprocessors and digital signal processing, " modeling amps " have been developed in the late 1990s, these can simulate the sounds of a variety of well-known tube amplifiers without needing to use vacuum tubes.

Since the early 1950s, the station name has been spelled with an apostrophe on the tube map although the name of the local area is generally spelled without.

Since the end of the war the station has only been used as an emergency access point to the tube.

* Balance Issues: Since the telescope tube is usually fixed in relationship to its altitude bearings, the addition or subtraction of equipment such as cameras, finderscopes or even unusually heavy eyepieces can render the telescope mount unbalanced unless a counterweight or similar modification is added.

Since the late 1990s, Dobsonians using the truss tube design became increasingly popular with manufacturers.

Since 1969 most modern BCs have used inflation gas from one of the diver's main gas cylinders, in addition to an oral inflation tube which is used at the surface in the event the diver has no high pressure gas left ( oral inflation can also be used at depth, in cases where a BC inflator hose develops a leak or problem and requires disconnection ).

* Since the area of the flow passage increases as the float moves up the tube, the scale is approximately linear.

Since the tube extends right into the stomach, it can also be used to monitor how well the patient is digesting their " food ".

Since the tube does not extend far into the trachea, it is easy to breathe and speak with the device in place.

Since the electrons are easily deflected by gas molecules, the entire tube has to be held in vacuum.

Since fortification began, the rate of neural tube defects has decreased by approximately one-third in the US.

Since this placement of the gearbox is unsuitable for a live axle ( due to excessive unsprung weight ), the rear suspension is either independent, or uses a de Dion tube ( notably in the Alfa Romeos ).

Since the corrector plate is at the center of curvature of the primary mirror in this design the tube length can be very long for a wide-field telescope.

Since the two ears are vented separately, the right Eustachian tube cannot alleviate pressure in the left ear.

Since a metal-halide lamp contains gases at a significant high pressure, failure of the arc tube is inevitably a violent event.

Since most current production shotguns come equipped with sighting ribs and interchangeable choke tubes, converting a standard shotgun to a slug gun can be as simple as attaching clamp-on sights to the rib and switching to a skeet or cylinder choke tube.

Since the apparatus is new, it requires experimentation and changes in technique.

Since the provision of skywave service requires adequate freedom from interference, only class 1, stations are capable of rendering skywave service.

Since it requires only five players, it would seem to fall into the category of chamber music -- yet it calls for a double bass, an instrument generally regarded as symphonic.

Since < tt > ns1 </ tt > is contained in < tt > example. org </ tt >, this requires resolving < tt > example. org </ tt > first, which presents a circular dependency.

Since capital goods and labor are highly heterogeneous ( i. e. they have different characteristics that pertain to physical productivity ), economic calculation requires a common basis for comparison for all forms of capital and labour.

Since 1968, however, the lowest published count for power-of-two was long achieved by the split-radix FFT algorithm, which requires real multiplications and additions for.

Since annealing brass requires heating it to about 660 F ( 350 C ), the heating must be done in such a way as to heat the neck to that temperature, while preventing the base of the case from being heated and losing its hardness.

Since the people of Lesotho believe sex requires a penis, however, they do not consider their behavior sexual, nor label themselves lesbians.

Since nearly all known chemistry requires a solvent, Smalley felt that Drexler's proposal to use a high vacuum environment was not feasible.

Since the early 1980s, an elegant solution has been the near-frictionless air bearing linear arm which requires no tracking drive mechanism other than the record groove itself.

Since radio waves travel at the speed of light, accurate distance measurement requires high-performance electronics.

Since the two-round system requires more information from each voter than a single ordinal ballot provides, one can't fit the criteria that are formulated expressly for voters with ordinal preferences without making a generalization as to how the voters will behave.

Since bundle theory states that all concrete particulars are merely constructions or ' bundles ' of attributes, or qualitive properties, the substance theorist's indiscernibility argument claims that the ability to recognize numerically different concrete particulars, such as concrete objects, requires those particulars to have discernible qualitative differences in their attributes and that the metaphysical realist who is also a bundle theorist must therefore concede to the existence of ' discernible ( numerically different ) concrete particulars ', the ' identity of indiscernibles ', and a ' principle of constituent identity '.

Since overhead transmission wires depend on air for insulation, design of these lines requires minimum clearances to be observed to maintain safety.

Since the only known way to solve that problem requires factoring the modulus, the difficulty of Integer factorization is generally regarded as providing security.

Since the C language is not object-oriented, the IDL to C mapping requires a C programmer to manually emulate object-oriented features.

Since the flow of services from ecosystems requires that they function as whole systems, the structure and diversity of the system are important components of natural capital.

# Since the scheme requires a continual stream of investments to fund higher returns, once investment slows down, the scheme collapses as the promoter starts having problems paying the promised returns ( the higher the returns, the greater the risk of the Ponzi scheme collapsing ).

Since it requires less energy to place a satellite into a LEO and the LEO satellite needs less powerful amplifiers for successful transmission, LEO is still used for many communication applications.

Since the volume-specific corollary of the Dulong-Petit specific heat capacity relationship requires that atoms of all elements take up ( on average ) the same volume in solids, there are many departures from it, with most of these due to variations in atomic size.

Since it does not ordinarily pass through cell membranes, protein pores in cell membranes are used to provide a channel through which it can be ' pumped ' -- an activity which requires energy if done against a concentration gradient.

Since phosphorylation of any site on a given protein can change the function or localization of that protein, understanding the " state " of a cell requires knowing the phosphorylation state of its proteins.

Since the RFC requires that the SMTP-sender use the order given in the A record query, the DNS server is free to carefully manipulate its balancing based on any method, including round robin DNS, mail server load, or some undisclosed priority scheme.

Since full-duplex operation requires characters to be sent and received at the same time, practical UARTs use two different shift registers for transmitted characters and received characters.