Fine particulate matter is considered to be the most significant ambient air pollutant in terms of potential health impacts. Therefore, it is important that regulators are able to accurately assess the exposure of populations to PM10 and PM2.5 across municipal areas. We report on the practicalities of using a laser light scattering portable particulate monitor (Turnkey Instruments DustMate), in...

We consider the numerical solution of an acoustic scattering problem by the Plane Wave Discontinuous Galerkin Method (PWDG) in the exterior of a bounded domain in R2. In order to apply the PWDG method, we introduce an artificial boundary to truncate the domain, and we impose a non-local Dirichlet-to-Neumann (DtN) boundary condition on the artificial curve. To define the method, we introduce new...

1 [Adjr2, {r2}, {whiter2}] (whiter2) 2 [Adjr2,U, ∅] (nopr2) 3 [Nr2, {r2}, {whiter2, rabbit r2}] (rabbit r2, 1) 4 [Nr2, {r2}, {whiter2}] (thingr2, 1) 5 [Nr2, {r1, r2}, {rabbit r2}] (rabbit r2, 2) 6 [NPr2, {r2}, {whiter2, rabbit r2}] (ther2, 3) 7 [NPr2, {r2}, {whiter2}] (ther2, 4) 8 [NPr2, {r1, r2}, {rabbit r2}] (ther2, 5) 9 [Se, {e}, {whiter2, rabbit r2, sleepe,r2}] (sleepe,r2, 6) 10 [Se, {e}, {...

the informal settlements are those parts of city which have been formed without plan or minimum facilities and services. therefore, they are considered as priorities in management cities for services and improving quality of life. in this regard, it is important to get solutions to make positive changes with the lowest cost and direct intervention. therefore, this study aims to explore the link...

Measurement and evaluation of soil erosion consequent sediment yield are fundamental in the planning management watersheds, as they allow identification critical areas susceptible to erosive processes. This study analyzed generated by water Indaia River Basin, Alto São Francisco, Minas Gerais, using SWAT hydrological model. From a regional/local scale, initial simulation variables (flow solid d...

In the title adduct, 3C(13)H(9)N·C(9)H(6)O(6) or (acr)(3)(btc), associ-ations of one btc and three acr molecules linked by O-H⋯N hydrogen bonds occur. C-H⋯O interactions also occur, resulting in a cyclic hydrogen-bonded synthon R(2) (1)(6). The acr mol-ecules and the btc mol-ecules also form slipped or offset π-π stacking inter-actions [centroid-centroid distances of 3.5212 (17) Å for btc rings...

OBJECTIVE Beta-trace protein concentrations in cerebrospinal fluid (CSF), serum and nasal secretions are investigated with a new quantitative, immunonephelometric assay. RESULTS The mean beta-trace concentration of normal lumbar CSF (18.4 mg/l) and normal serum (0.59 mg/l), from n = 132 control patients, were 10% higher than reported earlier for smaller control groups. The reference range of ...

We construct finite time blow-up solutions to the 2-dimensional harmonic map flow into the sphere S2, ut = ∆u+ |∇u|u in Ω× (0, T ) u = φ on ∂Ω× (0, T ) u(·, 0) = u0 in Ω, where Ω is a bounded, smooth domain in R2, u : Ω×(0, T ) → S2, u0 : Ω̄ → S2 is smooth, and φ = u0 ∣∣ ∂Ω . Given any points q1, . . . , qk in the domain, we find initial and boundary data so that the solution blows-up precisely ...

We consider a generalized Gause prey-predator model with T -periodic continuous coefficients. In the case where the Poincaré map P over time T is well defined, the result of the paper can be explained as follows: we locate a subset U of R2 such that the topological degree d(I −P,U) equals to +1. The novelty of the paper is that the later is done under only continuity and (some) monotonicity ass...

Abstract. Let B1 be the unit open disk in R2 and M be a closed Riemannian manifold. In this note, we first prove the uniqueness for weak solutions of the harmonic map heat flow in H1([0, T ]×B1,M) whose energy is non-increasing in time, given initial data u0 ∈ H(B1,M) and boundary data γ = u0|∂B1 . Previously, this uniqueness result was obtained by Rivière (when M is the round sphere and the en...