A Compatible Quadrilateral Finite Element for Plate Bending with Three-Nodal Degrees of Freedoms Each Node

This paper describes the formulation of a four node quadrilateral finite element for the use in the analysis of thin plate structures and the stiffened folded structures. The element has three degrees of freedom at each node, these are the displacement perpendicular to the plane of the plate and the two in-plane rotations. The element ensures conformity and inter-element continuity. Expressions for the displacement and rotations along the edges of the element are first formulated. Depending on these expressions, the approximation functions of the two in-plane rotations are derived. The state of the strain for the plate element is defined by the two rotations and it is not necessary to have an explicit formula of the displacement function in order to derive the element stiffness matrix. The derived element is fully compatible, when combined with plane strain element previously derived in the mid 80th and the classical beam elements for the analysis of stiffened folded plate structures

Absence and presence Organic and Inorganic Inhibitors

The aggressive effect of different concentrations of HNO3 and the inhibitive action of some organic and inorganic additives on the corrosion of copper metal have been studied by thermometric technique. The rate of metal dissolution increases with acid concentration. The copper dissolution rate in 2M HNO3 was dependent on the chemical properties and concentration of the used additives. The inhibitive action of these compounds obey the Langmuir adsorption isotherm. The degree of surface coverage (?) of adsorbed organic and inorganic additives was determined from the reaction number (R.N.) values. The thermodynamic parameters Kads. and ?G?ads. of organic additives are calculated and illustrated. The values of ?G?ads. clear strong physisorption of the tested organic inhibitors on copper metal surface. Keywords: Copper; Acid Corrosion; Passivity; Thermometry

A cryogenic surface-electrode elliptical ion trap for quantum simulation

Two-dimensional crystals of trapped ions are a promising system with which to implement quantum simulations of challenging problems such as spin frustration. Here, we present a design for a surface-electrode elliptical ion trap which produces a 2-D ion crystal and is amenable to microfabrication, which would enable higher simulated coupling rates, as well as interactions based on magnetic forces generated by on-chip currents. Working in an 11 K cryogenic environment, we experimentally verify to within 5% a numerical model of the structure of ion crystals in the trap. We also explore the possibility of implementing quantum simulation using magnetic forces, and calculate J-coupling rates on the order of 10^3 / s for an ion crystal height of 10 microns, using a current of 1 A

Prevalence, Electron Microscopy and Molecular Characterization of Cryptosporidium species Infecting Sheep in Egypt

Cryptosporidium sp. is predominant universally and sheep are an imperative zoonotic supply of the disease. Owing to the little information presented with respect to Cryptosporidium sp. infecting sheep, this study was directed to survey the predominance and molecular characterization of Cryptosporidium sp. among sheep of different ages and sexes in Qalyubia governorate, Egypt. The fecal specimens were gathered from 432 sheep of various ages (≤1 to <6, 6-12 and >12 months) and sexes. The samples were microscopically examined after staining by modified Zeihl- Neelsen technique and the intestinal mucosa was scanned by electron microscopy. A nested PCR was connected to amplify a 830 bp of 18S rRNA sequence of Cryptosporidium. RFLP (restriction fragment length polymorphism) technique using SspI and VspI enzymes for digestion of the secondary product of PCR for species identification was applied. The total infection rate was 25.93%. The parasite was more prevalent in males than females of different age groups. Two zoonotic Cryptosporidium species were distinguished after RFLP-PCR sequencing: C. parvum and C. ubiquitum (identified previously as Cervine genotype). The finding recommends that sheep must be considered as a noteworthy potential source of human cryptosporidiosis. A strict reconnaissance of zoonotic cryptosporidiosis must be set up to counteract human infection and to assess forthcoming disease when applying control programs

Residual and Past Entropies of Concomitants from Lai And Xie Extensions of Case-II of Generalized Order Statistics and its Dual

In this article, we consider a new extensions of Morgenstern family is Lai and Xie extensions and discuss their concomitants for case-II of generalized order statistics and case-II of dual generalized order statistics. Additionally, recurrence relation between moments is found for the recommended models. We have also derived the expression for the joint distribution of concomitants for case-II of generalized order statistics and its dual. The residual and past entropies are shown last

The General Artificial Intellect

In passages of Marx’s Grundrisse known as the Fragment on Machines, Marx suggested that advanced capitalist development leads to the production of autonomous machines that replace labour-power in the direct production process. Autonomist Marxist interpretations of this text have emphasized that the proliferation of immaterial labour is the historical condition that is leading to a crisis in the measure of value based on labour-time and that will lead to a future communist mode of production. Further, Mario Tronti posited that as capitalist development unfolds, it subsumes both the state and society, a concept known as the ‘social factory thesis’. This integrated article analyzes Marx and autonomist Marxist perspectives in relation to the advanced development of information technology. The approach contributes to the field of library and information science (LIS) by introducing Marx’s materialist conception of history to the study of social consciousness, information and information technology and materialist conceptions of information. The thesis statement posits that the total replacement of labour-power with machine-power leads to the development of what I refer to as the autonomous mode of production while network information technologies have become capital and the bourgeois state’s means of subsuming and producing ‘the social factory’. Case studies of Industry 4.0, Uber and smart cities support the thesis statement. The conclusion examines the social and political implications of capitalist development of the autonomous mode of production and capitalist and bourgeois state control of network information technology, offering instead the alternative path of communisation