Since these duties fit neatly with those of the proposed presidential aide, one person, with adequate staff assistance, could fill both jobs.

Since practical washing procedures are both lengthy and expensive, a number of laboratory tests have been developed for the numerical evaluation of detergents.

Since D and D' are both diagonalizable and they commute, they are simultaneously diagonalizable, and Af is diagonalizable.

Since N and N' are both nilpotent and they commute, the operator Af is nilpotent ; ;

Since Fogg's was a one-man, one-plane flying service, this meant that he would have to do both trips, flying alone 600 miles a day, under sub-freezing temperature conditions.

Since the adoption of a new constitution, early in 2010, the politics of Angola takes place in a framework of a presidential republic, whereby the President of Angola is both head of state and head of government, and of a multi-party system.

Since its independence, Armenia has maintained a policy of complementarism by trying to have friendly relations both with Iran, Russia, and the West, including the United States and Europe.

Since the Second World War, both theoretical and experimental fields have advanced at a rapid pace.

Since this picture was first developed by Ernst Stueckelberg, and acquired its modern form in Feynman's work, it is called the Feynman-Stueckelberg interpretation of antiparticles to honor both scientists.

Since 1972, the Roman Catholic Church uses the name " Anointing of the Sick " both in the English translations issued by the Holy See of its official documents in Latin and in the English official documents of Episcopal conferences.

Since the launch of Breakfast in 2000, the programme has been simulcast on both BBC One and BBC News, replacing the individual breakfast news programmes that had been run by both channels.

Since early 1989 the government recognizes both Israel and the Palestinian state.

Since most Western economies are now considered " open " with free capital movement, this essentially means that central banks may target interest rates or exchange rates with credibility, but not both at once.

Since then Calvin and Hobbes creator Bill Watterson has written extensively on the issue, arguing that size reduction and dropped panels reduce both the potential and freedom of a cartoonist.

Since current can be the flow of either positive or negative charges, or both, a convention for the direction of current which is independent of the type of charge carriers is needed.

Since tangents and inverse tangents are both continuous, our identification function is a homeomorphism between the real line and the unit circle without ∞.

Since both the noun and enclitic were declined, this led to " double declension ".

Since 2002, molecular phylogenetic studies have recognized a close relationship between Hydrochoerus and Kerodon supporting placement of both genera in a subfamily of Caviidae.

Since 2001, both baronies have been redesignated the City of Dublin.

Since two houses may be very different from one another, a design pattern for houses must be broad enough to apply to both of them, but not so vague that it doesn't help the designer make decisions.

Since 2004, the colón stopped circulating and is now never used in the country for any type of transaction ; however some stores still have prices in both colons and U. S. dollars.

In the first step, the final nonzero remainder r < sub > N − 1 </ sub > is shown to divide both a and b. Since it is a common divisor, it must be less than or equal to the greatest common divisor g. In the second step, it is shown that any common divisor of a and b, including g, must divide r < sub > N − 1 </ sub >; therefore, g must be less than or equal to r < sub > N − 1 </ sub >.

Since 2002, the new Afghan government has engaged in cordial relations with both Iran and the United States, even as relations between Iran and the United States have grown strained due to American objections to Iran's nuclear program.

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 birds lay eggs and rabbits and hares give birth to large litters in the early spring, these became symbols of the rising fertility of the earth at the March Equinox.

Since for all mother nature knows ( or could know ) it is possible that these insects will cross paths ( sometime, somewhere ) with insectivorous birds, they had better be designed with some avoidance machinery.

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 these birds are cavity nesters, their eggs do not need to be camouflaged and the white color helps the parents to see them in dim light.

Since fish diverges from the main stem of vertebrate evolution earlier than either birds or mammals, the cytochrome c of both mammals and birds should be equally different from the cytochrome c of fish.

Since they take fruit in flight as other species " hawk " for insects, they are believed to have evolved from insect-eating birds.

Since the late 19th century, it has been accepted by palaeontologists, and celebrated in lay reference works, as being the oldest known bird, though a study in 2011 has cast doubt on this assessment, suggesting instead that it is a non-avialan dinosaur closely related to the origin of birds.

Since the advent of phylogenetic nomenclature, the term Reptilia has fallen out of favor with many taxonomists, who have used Sauropsida in its place to include a monophyletic group containing the traditional reptiles and the birds.

Since then a number of storm-petrels exhibiting plumage and structural characteristics have been recorded at sea, principally in the North Atlantic, while birds were trapped during the summer months in France ( 1989 ), England ( 1989 birds, 1990 birds retrapped from 1991 to 1994 ), Spain ( 1994 ), Norway ( 1996, 1997 ), and again Madeira ( 1991, 1994 ),.

Since 1973, the American Ornithologists ' Union has elected to merge these passerine birds as one species.

Since 1998, a sample of birds have been fitted with unique leg bands or radio transmitters for monitoring reproductive success and survival, revealing that typically only 30 % of ducklings on Laysan Island survive to fledge.

Since this habitat management regime was begun in the 1970s, the birds ' numbers have steadily risen, though they are still at dangerously low levels.

Since then, it has been regularly sighted, including immature birds, suggesting a resident breeding population might already exist in that country.

Since then, the site has attracted many species of birds and animals.

Since then, FNPF has rehabilitated and released many endangered birds onto the island of Nusa Penida, including many Bali Mynas supplied from multiple breeders.

Since pythons eat endangered birds and alligators, these snakes present a new and serious danger to the fragile ecosystem.

Since these species are not closely related to modern birds, either the alula evolved twice, or it did so more than 130 million years ago.

Since the birds are bred mainly for efficient meat production, producing eggs can be a challenge.

Since modern birds that have symmetrical feathers are flightless, and the skeletal structure of Protarchaeopteryx would not support flapping flight, it is assumed that it was flightless as well.