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 the low pH of the stomach normally kills ingested bacteria, antacids increase the vulnerability to infection.

Since then, there have been many refinements to increase the field of view, mass and position resolution, and data acquisition rate of the instrument.

Since the publication of Nineteen Eighty-Four the phrase " Big Brother " has come into common use to describe any prying or overly-controlling authority figure, and attempts by government to increase surveillance.

Since then, with several relaunches, an increase in funding and resources from the BBC and improvements in digital television technology, the channel has been able to diversify content, with two minute looped bulletins available to view via BBC Red Button, BBC News Online and the BBC's mobile website, alongside individual weather and sport bulletins.

Since petroleum is so important to industrialised economies, a large increase in its price can lead to the increase in the price of most products, raising the inflation rate.

The event temporarily warmed air temperature by 1. 5 ° C, compared to the usual increase of 0. 25 ° C associated with El Niño events .< ref name =" Trenberth "> Since then, mass coral bleaching has become common worldwide, with all regions having suffered " severe bleaching ".

Since wave resistance and other impeding forces such as various types of drag ( physics ) on the hull are eliminated as the hull is lifted clear, turbulence and drag act only on the much smaller surface area of the hydrofoil and there is a marked increase in speed.

Since the war, Kuwait, with the help of the United States and other allies, has made significant efforts to increase the size and modernity of their armed forces.

Since the end of the whaling and sealing era, most of the islands ' species have been able to increase their population again.

Since the 1960s, the mainland population has declined by 60-70 %; though there has been a small increase on Motunau Island.

Since democracy returned to Brazil, however, there has been a steady increase in the percentage of literate people.

Since higher wages increase the quantity supplied, the supply of labor curve is upward sloping, and is shown as a line moving up and to the right.

Since the level of world trade was viewed as fixed, it followed that the only way to increase a nation's trade was to take it from another.

Since the CFCs themselves are equally powerful greenhouse gases, the mere substitution of HFCs for CFCs does not significantly increase the rate of anthropogenic global warming, but over time a steady increase in their use could increase the danger that human activity will change the climate.

Since the probability per distance traveled for a neutron to collide with a nucleus is proportional to the material density, increasing the density of a fissile material can increase k. This concept is utilized in the implosion method for nuclear weapons.

Since the 1990s to the present, responses to mad-cow disease, genetically modified foods, flu epidemics in pigs and birds, and an increase in foodborne illness outbreaks, agricultural pollution, and Concentrated Animal Feeding Operations ( CAFOs ) have led people to question where their food comes from and what is actually in it.

Since plug-ins and extensions both increase the utility of the original application, Mozilla uses the term " add-on " as an inclusive category of augmentation modules that consists of plug-ins, themes, and search engines.

Since this operation PLAN has sought the leadership of the ‘ Shared Awareness and Deconfliction ’ body ( SHADE ), which would require an increase in the number of vessels contributing to the anti-piracy fleet.

Since the early 1990s, the legitimatization of the principle of national self-determination has led to an increase in the number of conflicts within states, as sub-groups seek greater self-determination and even full secession, and as their conflicts for leadership within groups and with other groups and with the dominant state become violent.

Since that fuel must itself be accelerated, this results in an approximately exponential increase in mass as a function of velocity change at non-relativistic speeds, asymptotically tending to infinity as it approaches the speed of light.

Since the mid-twentieth century, there has been a significant increase in interest in Gregory's works from the academic community, which has resulted in challenges to many traditional interpretations of his theology.

Since the circulating thyroid hormones are the amino acids thyroxine and tri-iodothyronine ( cf. Section C ), it is clear that some mechanism must exist in the thyroid gland for their release from proteins before secretion.

Since male sexuality is largely controlled by hormones, andrology overlaps with endocrinology.

Since salt restriction is the basic concept in treatment, and aldosterone is one of the hormones that acts to increase salt retention, a medication that counteracts aldosterone should be sought.

Since then, experiments have been done often with injections of iodine or various thyroid hormones used to induce metamorphosis.

Since ABA dissipates slowly from the tissues and its effects take time to be offset by other plant hormones, there is a delay in physiological pathways that provide some protection from premature growth.

Since behavior is rooted in biology, selecting for tameness and against aggression means selecting for physiological changes in the systems that govern the body's hormones and neurochemicals.

Since the ozone layer prevents most harmful UVB wavelengths ( 280 – 315 nm ) of ultraviolet light ( UV light ) from passing through the Earth's atmosphere, observed and projected decreases in ozone have generated worldwide concern leading to adoption of the Montreal Protocol that bans the production of CFCs, halons, and other ozone-depleting chemicals such as carbon tetrachloride and trichloroethane.

Since MCS sufferers seem to have symptoms only when they perceive exposure to chemicals, the syndrome is proposed to be a result of odor hypersensitivity in which individuals have an exaggerated response to scents, or psychological factors.

Since kingfishers are high up in the food chain, they are vulnerable to build-up of chemicals, and river pollution by industrial and agricultural products excludes the birds from many stretches of otherwise suitable rivers that would be habitats.

Since no chemicals or water are absorbed into the paper base, the time needed for processing, washing and drying durations are significantly reduced in comparison to fiber-based papers.

Since his wife tasted nothing strange about the rolls, Remsen tasted his fingers and noticed that the bitter taste was probably from one of the chemicals in his lab.

Since the 1950s, rudimentary treatments such as storage in pits, composting, and mixture with chemicals have been implemented.

Since enactment, Proposition 65 has been the reason for reformulation of numerous consumer products to eliminate toxic chemicals covered by Proposition 65, as well as other significant changes to reduce exposures such as toxic air emissions.

Since in military conflicts, bombs are dropped and / or chemicals used from napalm to hydrogen bombs.

Since there are few porphyrins naturally found in the skin, the treatment is believed safe except in patients with porphyria ; although eye protection is used due to light-sensitive chemicals in the retina.

Since it is a non-absorbent material once created, flame retardant chemicals are added to plastic during the polymerization reaction when it is formed.

Since 2001, Arthur D. Little has successfully rebuilt its core practices in Oil & Gas, telecommunications, automotive and manufacturing, and chemicals.

Since that time another 20, 000 chemicals have been put into commercial circulation in the US, also with little or no data to support their safety.

Since paint introduces small amounts of potentially toxic chemicals into a protected environment, it is often preferred to keep the blazes small.

Since then, the company has expanded into various businesses with five core business units: chemicals, paper, cement, building materials and distribution.

Since UHMWPE does not contain chemical groups ( such as esters, amides or hydroxylic groups ) that are susceptible to attack from aggressive agents, it is very resistant to water, moisture, most chemicals, UV radiation, and micro-organisms.