Since that time, Alberta's economic fortunes have largely tracked the price of oil, and increasingly natural gas prices.

Since carbon monoxide is a colorless, odorless and tasteless gas, and poses a potentially fatal threat, detectors have become commercially available to warn of dangerous levels in residences.

Since 1999, the Isle of Man has received electricity through the world's longest submarine AC cable, the 90 kV Isle of Man to England Interconnector, as well as from a natural gas power station in Douglas, an oil power station in Peel and a small hydro-electric power station in Sulby Glen.

Since World War II, Iraq's use of mustard gas against Iranian troops and Kurds ( Iran-Iraq war of 1981 – 1988 ) has been the only large-scale use of any chemical weapons.

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 the collapse of the Soviet Union on 31 December 1991, privately owned Russia-based multinational corporations, including producers of petroleum, natural gas, and metal have, in the view of some analysts, become oligarchs.

Automobile exhaust gas capture has also been proposed to be economical but would require extensive design changes or retrofitting .< ref name = Musadi2011 > Since carbonic acid in seawater is in chemical equilibrium with atmospheric carbon dioxide, extraction of carbon from seawater has been studied.

Since xenon is a volatile noble gas it can be assumed that there wasn't much of it in the rock to begin with.

Since 80 % or more of the oxygen remains in normal exhaled gas, and is thus wasted, rebreathers use gas very economically, making longer dives possible and special mixes cheaper to use at the cost of more complicated technology and more possible failure points.

Since the UNFCCC entered into force, the parties have been meeting annually in Conferences of the Parties ( COP ) to assess progress in dealing with climate change, and beginning in the mid-1990s, to negotiate the Kyoto Protocol to establish legally binding obligations for developed countries to reduce their greenhouse gas emissions.

Since it is in the gas phase, the amount of vapor present is quantified by the partial pressure of the gas.

Since the force imparted by a magnetic field is proportional to the charge on the particle, and the acceleration is proportional to the force divided by the mass of the particle, the magnets required to contain uranium gas would be impractically large ; most such designs have focussed on fuel cycles that do not depend upon retaining the fuel in the reactor.

Since the dielectric strength of gases varies depending on the shape and configuration of the electrodes, it is usually measured as a fraction of the dielectric strength of Nitrogen gas.

Since then, the U. S. has contributed to other large infrastructure programs including the Interstate Highway System, 1956-1990, with a dedicated financing system through the gas tax and a matching contribution between federal government and states at 90 % to 10 %.

Since thrust depends on both the amount of gas moved and the velocity, we can generate high thrust by accelerating a large mass of gas by a small amount, or by accelerating a small mass of gas by a large amount.

Since oil and gas pipelines are an important asset of the economic development of almost any country, it has been required either by government regulations or internal policies to ensure the safety of the assets, and the population and environment where these pipelines run.

Since quartz is very strong, the gas pressure can be higher, which reduces the rate of evaporation of the filament, permitting it to run a higher temperature ( and so luminous efficacy ) for the same average life.

Since methane clathrates are stable at a higher temperature than liquefied natural gas ( LNG ) (− 20 vs − 162 ° C ), there is some interest in converting natural gas into clathrates rather than liquifying it when transporting it by seagoing vessels.

Since then, large natural gas reserves have also been discovered.

Since the Supreme Court's decision of that year this is more doubtful ; ;

( Since the time-span of the nation-state coincides roughly with the separate existence of the United States as an independent entity, it is perhaps natural for Americans to think of the nation as representative of the highest form of order, something permanent and unchanging.

Since it is not far from Viareggio, he will visit Puccini's house, as he never fails to do, to pay his respects to the memory of the composer of La Boheme, which he considers one of Puccini's masterpieces.

Since attack serves to stimulate interest in broadcasts, I added to my opening statement a sentence in which I claimed that German youth seemed to lack the enthusiasm which is a necessary ingredient of anger, and might be classified as uninterested and bored rather than angry.

Since the air is a continuum, the network of communication remains intact regardless of the positions or motions of the points ( the people ) in the net.

Since the hazards of poor communication are so great, p can be justified as a habitable site only on the basis of unusual productivity such as is made available by a waterfall for milling purposes, a mine, or a sugar maple camp.

Since the difficulty of drawing the net is great, we will merely discuss it.

Since a civilizational crisis involves also a crisis in private interests and in the ruling class, reaction is normally found among those who feel themselves to be among the ruling class.

Since civilizational change is the most difficult to perceive and analyze, it seldom is given adequate attention.

Since the slogans have little application to reality and are sanctimonious to boot, the applause is faint even in areas of the world where we should expect to find the greatest affection for free government.

Since more is known about Quiney than about any other acquaintance of Shakespeare in Stratford, his career may be followed to its sudden end in 1602.

Since the great flood of these dystopias has appeared only in the last twelve years, it seems fairly reasonable to assume that the chief impetus was the 1949 publication of Nineteen Eighty-Four, an assumption which is supported by the frequent echoes of such details as Room 101, along with education by conditioning from Brave New World, a book to which science-fiction writers may well have returned with new interest after reading the more powerful Orwell dystopia.

Since Laos is of no more purely military value to Moscow itself than it is to Washington, this approach might be expected to head off Mr. Khrushchev for the moment.

Since little is known about autism, and almost nothing has been written for the layman, we'd like to share one experienced mother's comments.

Since the work is done by hand, the only limitation, it is said, `` is that of human conception ''.

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

Since the obvious is not always true, the Republican National Committee wisely analyzed its defeat of last autumn and finds that it occurred, as suspected, in the larger cities.

Since he has just shown who is top dog, he may not be ready to receive this highest honor in the gift of the Soviet people.

Since appeals to morality, to humanity, and to sanity have had such small effect, perhaps our last recourse is the deterrent example.

Since the goal of our international planners is a World Government, this Atlantic Community would mark a giant step in that direction for, once American economic autonomy is absorbed, a larger grouping is a question of time.

Since its reformation under private law in 1994, Deutsche Bahn AG ( DB AG ) no longer publishes details of the tracks it owns ; in addition to the DBAG system there are about 280 privately or locally owned railway companies which own an approximate 3, 000 km to 4, 000 km of the total tracks and use DB tracks in open access.

Since all other atomic, or molecular systems, involve the motions of three or more " particles ", their Schrödinger equations cannot be solved exactly and so approximate solutions must be sought.

Since the strong interaction does not discriminate between different flavors of quark, QCD has approximate flavor symmetry, which is broken by the differing masses of the quarks.

Since modern computer equipment cannot easily generate 1. 42 bits for the stop period, common practice is to either approximate this with 1. 5 bits, or to send 2. 0 bits while accepting 1. 0 bits receiving.

Since then, the approximate region he identified has become known as Broca's area, and the deficit in language production as Broca's aphasia.

Since there may be an eclipse every half draconic month, we need to find an approximation for the number of half draconic months per synodic month: so the target ratio to approximate is: SM / ( DM / 2 )

Since the Earth is flattened at the poles and bulging at the equator, the geometrical figure used in geodesy to most nearly approximate Earth's shape is an oblate spheroid.

Since approximately follows a standard normal distribution when the alternative hypothesis is true, the approximate power can be calculated as

Since the advent of the tetraploid hybrid Phalaenopsis Doris, they have become extremely easy to grow and flower in the home, as long as some care is taken to provide them with conditions that approximate their native habitats.

Since θ is small we can approximate this by

Since the 243: 395 Earth: Venus commensurability is only approximate, there are different sequences of transits occurring 243 years apart, each extending for several thousand years, which are eventually replaced by other sequences.

Since the exact appearance of the original Washington family home is not known, a Memorial House was designed by Edward Donn, Jr., representing similar buildings of the era and constructed on the approximate site in 1931.

Since this value is near the approximate diameter of Ananke itself, it is likely the parent body was not heavily disrupted.

Since the mid-1990s these more sophisticated tree-and network-based phylogenetic methods have been used to investigate the relationships between languages and to determine approximate dates for proto-languages.

Since the signal strength changed on its own for various reasons as well as being on or off target, this was not very accurate, and generally required the use of a searchlight to spot the target once the radar had settled on an approximate position.

Since the probability of actually striking the aircraft was small, artillery shells were designed to explode at the approximate altitude of the aircraft to throw a shower of fragments in the vicinity of the explosion.

The approximate volume of liquid water on the Earth is 1. 333 * 10 ^ 9 km³, or 1. 333 * 10 ^ 24 milliliters .< ref > United States of America, United States Geological Survey, Earth's Water Distribution, 10 May 2007 < http :// ga. water. usgs. gov / edu / waterdistribution. html ></ ref > Since the density of water is roughly 1g / mL, this is 1. 333 * 10 ^ 24 grams of water.

Since computer power has advanced rapidly and punched cards are no longer used, more sophisticated methods of imputation have generally superseded the original random and sorted hot deck imputation techniques, such as the nearest neighbour hot deck imputation and the approximate Bayesian bootstrap.

Since neutrino oscillations have been observed, neutrinos do have a tiny nonzero mass and conservation laws for LF numbers are therefore only approximate.

Since first-order processes are more common than second-order processes ( involving two quark decays ), this can be used as an approximate " selection rule " for weak decays.

Since it has many flavours of quarks, it has approximate flavour and chiral symmetry.

Since our unit of distance is usually quite small, we can approximate by assuming that this arc is a line.

Since a constant barrage of synaptic activity would approximate a constant current injection, the overall level of synaptic activity in the distal apical dendrite could set the depolarization level of the entire neuron.