Since then, there has been a notable increase in the number of stations and also the accumulation of additional data and the development of new techniques for using it, leading to a better understanding of propagation phenomena.

Since then, biochemistry has advanced, especially since the mid-20th century, with the development of new techniques such as chromatography, X-ray diffraction, dual polarisation interferometry, NMR spectroscopy, radioisotopic labeling, electron microscopy, and molecular dynamics simulations.

Since people are human, one should teach first about humans, not machines or techniques.

Since then, over 1, 700 clinical trials have been conducted using a number of techniques for gene therapy.

Since organic compounds often exist as mixtures, a variety of techniques have also been developed to assess purity, especially important being chromatography techniques such as HPLC and gas chromatography.

Since synthetic polymerization techniques typically yield a polymer product including a range of molecular weights, the weight is often expressed statistically to describe the distribution of chain lengths present in the same.

Since the 1970s, a large number and variety of encryption, digital signature, key agreement, and other techniques have been developed in the field of public-key cryptography.

Since people are human, one should teach first about humans, not machines or techniques.

Since the rise of experimental psychology in the late 19th Century, psychology's understanding of perception has progressed by combining a variety of techniques.

Since the mid-20th Century, advances in rubber, plastics, synthetic cloth, and industrial adhesives have allowed manufacturers to create shoes that stray considerably from traditional crafting techniques.

Since the mid-1990s, starspot observations have been made using increasingly powerful techniques yielding more and more detail: photometry showed starspot growth and decay and showed cyclic behavior similar to the Sun's ; spectroscopy examined the structure of starspot regions by analyzing variations in spectral line splitting due to the Zeeman Effect ; Doppler imaging showed differential rotation of spots for several stars and distributions different from the Sun's ; spectral line analysis measured the temperature range of spots and the stellar surfaces.

Since its introduction in the early 90s, new computer video techniques have been introduced which the original AVI specification did not anticipate:

Since the end of 1990s, broadband access techniques such as ADSL, Cable modems, fiber-to-the-building ( FTTB ) and fiber-to-the-home ( FTTH ) have become wide spread to small offices and homes.

Since that time, patents on various well-known arithmetic coding techniques have also expired.

Since determining the order of execution of operations ( including which operations can execute simultaneously ) is handled by the compiler, the processor does not need the scheduling hardware that the three techniques described above require.

Since the 1990s, more sensitive molecular techniques have been used to determine carrier status.

Since 1960 Johns has worked closely with Universal Limited Art Editions, Inc ( ULAE ) in a variety of printmaking techniques to investigate and develop existing compositions.

When objectively analyzing the condition for learning Gagné says: “ Since the purpose of instruction is learning, the central focus for rational derivation of instructional techniques is the human learner.

Since these services involve flying into steep, short, or otherwise difficult runways, JAARS provides its personnel with training in STOL and other specialised techniques.

Since this time the basic Taijutsu of Kukishin-ryū is Takagi-ryū while the Bōjutsu, Spear and Naginata techniques have remained Kukishin-ryū. r

Since its rebirth in the 1950s, advancements in computing technology have allowed scientists from many disciplines to pair traditional Bayesian statistics with random walk techniques.

Since contemporary musicians use different vocal techniques, microphones, and are not forced to fit into a specific vocal role, applying such terms as soprano, tenor, baritone, etc.

Since UWB has almost impulse-like channel response, a combination of multiple antenna techniques is preferable as well.

Since the names of functions are largely a convenience, the lambda calculus has no means of naming a function.

Since a Taylor series evaluated with a Laurent series as its argument is still a Laurent series, the system can be used to do calculus on transcendental functions if they are analytic.

Since the calculus is a query language for relational databases we first have to define a relational database.

Since formal proofs in proof theory are purely syntactic, the meaning of ( the derivation of ) a sequent is only given by the properties of the calculus that provides the actual rules of inference.

Since the publication of Jean-Yves Girard's linear logic there have been several new noncommutative logics proposed, namely the cyclic linear logic of David Yetter, the pomset logic of Christian Retoré, and the noncommutative logics BV and NEL studied in the calculus of structures.

Since the HJE is an equivalent expression of an integral minimization problem such as Hamilton's principle, the HJE can be useful in other problems of the calculus of variations and, more generally, in other branches of mathematics and physics, such as dynamical systems, symplectic geometry and quantum chaos.

Since infinitesimal calculus as we know it did not yet exist then, and the mathematical analysis of the time was inadequate to discuss the convergence issues, this was a hard piece of research, and tentative as well.

Since 1986, it provides advanced courses in probabilities, statistics, stochastic calculus and in computer science, in order to train people to work as Quantitative analysts.

Since the invention of calculus, the slope of the tangent line can be found easily using implicit differentiation.

Since ordinary breakfast-table conversation was impossible, it was at least something that they were able to offer Eugene the sugar bowl with their sugar in it, and the plate of bread and butter, and that Eugene could return the pitcher of hot milk to them handle first.

Since the writer had not noticed this characteristic in married students scattered throughout the various sections previous to this experiment, nor, as a matter of fact, in those who were continuing in `` single sections '', he can only conclude that there must have been something `` contagious '' within the specific group which caused this to occur.

Since her bereavement this individual has reported to the writer on numerous occasions about how helpful the class discussions were to her in this adjustment crisis.

Since a national interpretation cannot be avoided it is unfortunate that the elections were not held in a way to maximize party responsibility and the educational effect of mass political participation.

Since the details of the elections were settled the change of government had no direct effect on the technical aspects of the elections, and may have been more important as an indication of royal displeasure with the U.N.F.P.

Since Parts 1, and 2, were prepared independently, the abbreviation schemes and the chemical symbols used differ in the two parts.

Since they were hunting for national defense contracts, Adam Herberet, a man of surprising resources, entered the combination as a silent partner because of his political connections.

Since then and during the first decade, the results were given to newspapers for publication at 11 pm on the night of the awards.

Since the fourth ceremony, the system changed, and professionals were honored for a specific performance in a single film.

Since many European typewriters placed the parentheses with 8 and 9, those corresponding positions were chosen for the parentheses.

Since the deciding bodies he had chosen were more concerned with the former, the prizes went to scientists and not to engineers, technicians or other inventors.

Since some of the Roman months were named in honor of divinities, and as April was sacred to the goddess Venus, the Festum Veneris et Fortunae Virilis being held on the first day, it has been suggested that Aprilis was originally her month Aphrilis, from her equivalent Greek goddess name Aphrodite ( Aphros ), or from the Etruscan name Apru.

Since Johnson's proclamations allowed the Southern states to control the procedure and conduct of their elections in 1865, prominent former Confederate leaders were elected to the U. S. Congress ( but not seated ).

Since military issues were not a government priority, Afonso established the state's administration and centralized power on himself.

Since baseball-only stadiums were not seen as fiscally viable during that era, this effectively ended Stone's bid.

Since the Plebeian Aediles were elected by the Plebeians ( commoners ), rather than by all of the People of Rome ( Plebeians as well as members of the Patrician aristocracy ), they were not technically magistrates.

" Since the playwright's wishes were not protected by copyright, Ibsen decided to avoid the danger of being re-written by a lesser dramatist by committing what he called a " barbaric outrage " on his play himself and giving it an alternative ending in which Nora did not leave.

Since 1992 cities and towns statewide were able to sell on Sundays from the Sunday prior to Thanksgiving to New Years Day.

Since early BBSes were frequently run by computer hobbyists, they were typically technical in nature with user communities revolving around hardware and software discussions.

Since they were essentially itinerant, they confided to the care of some of the better educated and highly respected converts the fixed necessary functions relating to the daily life of the community.

Since its inception Beechcraft has resided in Wichita, Kansas, also the home of chief competitor Cessna, the birthplace of Learjet and of Stearman, whose trainers were used in large numbers during WW2.

Since the shields were wooden, they may have provided sufficient buoyancy

Since the 1990s, violent conflict has occurred between some transmigrant and indigenous populations ; in Kalimantan, thousands were killed in fighting between Madurese transmigrants and the indigenous Dayak people.