1930 yılından günümüze uzanan aerojeller; Guinness rekorlar kitabına giren en hafif ve katı malzeme olarak seçilmiştir. Yüksek ısıl absorbsiyon özelliği, çok iyi yalıtkanlık kabiliyeti, mezo gözenek yapısı mukavemetinin yüzey alanının yüksek olması gibi üstünlüklerinin birçok malzemeye alternatif kullanım avantajı sektörde olanağı sunmaktadır. Bu çalışmada, sol-jel tekniği kullanılarak saflıkta...

Abstract. Geodynamical simulations over the past decades have widely been built on quadrilateral and hexahedral finite elements. For discretization of key Stokes equation describing slow, viscous flow, most codes use either unstable Q1×P0 element, a stabilized version equal-order Q1×Q1 or more recently stable Taylor–Hood element with continuous (Q2×Q1) discontinuous (Q2×P-1) pressure. However, ...

Background: Avian infectious bronchitis (IB) is an infectious viral disease of chickens. The effective protection of chickens against many different infectious bronchitis virus (IBV) variants is not achieved unless the circulating genotypes in the region are identified and the cross-protection of the potential of vaccines in use is assessed. Aims:In a monitoring program of IBVs, a new genotype ...

In Q1 2021, the revenues of regions’ consolidated budgets went up compared to 2020. The growth was ensured by federal budget fiscal transfers and an increase in own tax non-tax regional local budgets. According results H1 we can expect double-digit rates subjects Russian Federation, main trend structure public debt regions until end this year will be replacement commercial loans with ones.