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مقایسه جذب آب و قابلیت انحلال ماده بهسازی بافت آکروسافت و ویسکوژل دکتر فریبا گلبیدی* - دکتر بهار بهدادمهر** *- استادیار گروه آموزشی پروتزهای دندانی دانشکده دندانپزشکی دانشگاه علوم پزشکی اصفهان. **- دندانپزشک. چکیده زمینه و هدف: نزدیک به یک قرن است که لایه های نرم در دندانپزشکی استفاده می شوند.هدف از این مطالعه اندازه گیری و مقایسه میزان جذب آب و قابلیت انحلال ماده بهسازی بافت ایرانی آکروسافت با...
BACKGROUND Health anxiety has been treated by therapists expert in cognitive behaviour therapy with some specific benefit in some patients referred to psychological services. Those in hospital care have been less often investigated. Following a pilot trial suggesting efficacy we carried out a randomised study in hospital medical clinics. METHODS We undertook a multicentre, randomised trial on...
We describe degenerations and smoothings of linear series on some reducible algebraic curves. Applications include a proof that the moduli space of curves of genus g has general type for all g > 24, a proof that the monodromy action is transitive on the set of linear series of dimension r and degree d on a general curve of genus g when p := g — (r + l)(g — d+r) = 0, a proof that there exist Wei...
I am humbled by the honor bestowed upon me to serve as the President of the American Burn Association (ABA). For me, it is the ultimate achievement in a career that started, as with most burn doctors of my generation, as a matter of circumstance and opportunity rather than a matter of choice. Having fallen into the field, however, I must state that I am fortunate and proud to have had the pleas...
Ž . Geologic mapping of volcanic strata of the northern Puertecitos Volcanic Province PVP in northeastern Baja California, Mexico, performed in conjunction with ArrAr analysis and petrochemical study, documents the Miocene geologic history of a well-preserved volcanic succession within the northern Sierra Santa Isabel and its relationship to the evolving Pacific–North America plate boundary. Su...
It is proved that the free m-generated Burnside groups B(m, n) of exponent n are infinite provided that m > 1 , n > 248 . In 1902 William Burnside posed the following problem [2]. Does a group G have to be finite provided that G has a finite set of generators and its elements satisfy the identity x" — 1 ? In other words, must a finitely generated group G of exponent n be finite? In the same pap...
We consider the problem of determining the conformai type—hyperbolic or parabolic—of a covering surface of the Riemann sphere with n punctures. To such a surface there corresponds a graph called the Speiser graph of the covering, and it is natural to ask for a criterion for the type of the surface in terms of properties of the graph. We show how to define a random walk on the vertices of the gr...
Petrologic studies of igneous rocks often rely on whole-rock analyses alone to deduce source and melting histories. Whole-rock compositions represent a mixture of the processes responsible for the final texture and composition of the rock, but do not emphasize the evolutionary processes that the rock may have experienced. We examine the major, minor, and trace element compositions of plagioclas...
The Radio Observatory on the Lunar Surface for Solar studies (ROLSS) is a concept for a near-side low radio frequency imaging interferometric array designed to study particle acceleration at the Sun and in the inner heliosphere. The prime science mission is to image the radio emission generated by Type II and III solar radio burst processes with the aim of determining the sites at and mechanism...
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