Controlling Soil-Borne Diseases in Ohio Nurseries

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Prospects for the Application of Nanotechnologies to the Computer System Architecture

Computer system architecture essentially influences the comfort of our everyday living. Developmental transition from electromechanical relays to vacuum tubes, from transistors to integrated circuits has significantly changed technological standards for the architecture of computer systems. Contemporary information technologies offer huge potential concerning miniaturization of electronic circuits. Presently, a modern integrated circuit includes over a billion of transistors, each of them smaller than 100 nm . Stepping beyond the symbolic 100 nm limit means that with the onset of the 21 century we have entered a new scientific area that is an era of nanotechnologies. Along with the reduction of transistor dimensions their operation speed and efficiency grow. However, the hitherto observed developmental path of classical electronics with its focus on the miniaturization of transistors and memory cells seems arriving at the limits of technological possibilities because of technical problems as well as physical limitations related to the appearance of new nano-scale phenomena as e.g. quantum effects. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2488

Prospects for the Application of Nanotechnologies to the Computer System Architecture

Computer system architecture essentially influences the comfort of our everyday living. Developmental transition from electromechanical relays to vacuum tubes, from transistors to integrated circuits has significantly changed technological standards for the architecture of computer systems. Contemporary information technologies offer huge potential concerning miniaturization of electronic circuits. Presently, a modern integrated circuit includes over a billion of transistors, each of them smaller than 100 nm . Stepping beyond the symbolic 100 nm limit means that with the onset of the 21 century we have entered a new scientific area that is an era of nanotechnologies. Along with the reduction of transistor dimensions their operation speed and efficiency grow. However, the hitherto observed developmental path of classical electronics with its focus on the miniaturization of transistors and memory cells seems arriving at the limits of technological possibilities because of technical problems as well as physical limitations related to the appearance of new nano-scale phenomena as e.g. quantum effects. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2488

Structural Features Amorphous-like Coatings AlN-TiB2-TiSi2 After Annealing (900, 1300)ºC and their Impact on Physical and Mechanical Properties Changes

The magnetron sputtered coatings on base AlN-TiB2(TiSi2) were investigated. The element composition, structural-phase composition, morphology were investigated before and after annealing of coatings with 9000C, 13000C using SEM/EDS, AFM, SIMS, XRD, 3D Laser, Nanoindenter. The concentrations of elements in the coating were changed after annealing under 9000C and further annealing under 13000C. Achieving viscoplastic index of 0.07 value when the hardness H = 15.3 GPa, provides high damping properties of the coating, wherein an amorphous structure is promising to use coatings such as diffusion barriers in the form of separate elements or as a layer in contact of multilayer wear resistant coatings

Carbon dioxide emission and humus status of Albic Stagnic Luvisol under different fertilization regimes

The increase in the carbon dioxide content in the atmosphere, which enhances the greenhouse effect and leads to climate change, is the fundamental scientific problem of nowadays. Modern approaches to fertility management technologies of acid soils based on the principles of resource conservation and environmental safety are presented. They are based on the results of the study of carbon dioxide emission intensity, humus status, and crop rotation productivity in a classic long-term agricultural experiment under the influence of long-term use of various fertilizer systems with the application of ameliorant doses calculated by pH buffering capacity and hydrolytic acidity. The organo-mineral fertilizer system with the addition of 10 t of manure per ha of crop rotation area + N65P68K68, liming with a CaCO3 dose calculated according to pH buffering capacity (2.5 t/ha) contributes most to the optimization of soil processes. At the same time, it ensures the rational use of fertilizers and ameliorants, preservation of fertility, optimizes the processes of humus formation and carbon dioxide release. A high level of productivity of Albic Stagnic Luvisols forms under these conditions – 7.38 t/ha of grain units. Application of 1.0 and 1.5 lime norms calculated according to soil hydrolytic acidity with organic-mineral and mineral fertilizer systems on Albic Stagnic Luvisols in a short four-field crop rotation is not only a high-cost measure. However, it causes significant carbon loss in the form of CO2 due to additional mineralization. It is accompanied by calcium leaching and creates environmental problems in the conditions of the periodic washing-off water regime. Therefore, liming by CaCO3 dose calculated according to acid-base buffering capacity should be carried out before each of the following rotations in order to harmonize the environmental and productive functions of Albic Stagnic Luvisols in the short crop rotation. The obtained research results will be used to improve the methodology for determining carbon dioxide emissions and predicting the effect of various fertilizer and liming systems on its balance in the soil

Structural Features Amorphous-like Coatings AlN-TiB2-TiSi2 After Annealing (900, 1300)ºC and their Impact on Physical and Mechanical Properties Changes

The magnetron sputtered coatings on base AlN-TiB2(TiSi2) were investigated. The element composition, structural-phase composition, morphology were investigated before and after annealing of coatings with 9000C, 13000C using SEM/EDS, AFM, SIMS, XRD, 3D Laser, Nanoindenter. The concentrations of elements in the coating were changed after annealing under 9000C and further annealing under 13000C. Achieving viscoplastic index of 0.07 value when the hardness H = 15.3 GPa, provides high damping properties of the coating, wherein an amorphous structure is promising to use coatings such as diffusion barriers in the form of separate elements or as a layer in contact of multilayer wear resistant coatings

Ion Recrystallization and Spheroidization in Amorphous AlN-TiB2-TiSi2 as a Result of Annealing and Subsequent Implantation by Negative ion Au –

This paper presents new results on investigation of the influence of Au- negative ion beam implantation and thermal annealing under 900 °C and 1300 °C on structure and characteristics of AlN-TiB2-TiSi2 coatings prepared by magnetron sputtering. Using scanning electron microscope (SEM) with microanalysis (EDS), atomic force microscopy (AFM), X-Ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) investigated the crystal structure, surface topography, microstructure were characterized

Effects of Al dopant on structural and optical properties of ZnO thin films prepared by sol-gel

Transparent and conductive Al doped ZnO thin films were synthesized at room temperature by sol gel technique both pure ZnO and Al-doped(1,3,and 5%) thin films were deposited on a glass substrate. The sols were prepared using zinc acetate dehydrate and aluminum chloride provides Al ions, played an important role in improvement of the c – axis, the structural characteristics have been studied by X-ray diffraction, and UV–Vis-NIR spectroscopy. The films are transparent from the near ultraviolet to the near infrared, SEM image also showed that the average grain size is decreased with increasing of Al concentration, band gap values of prepared thin films varied in the range of (3.18 – 3.42 eV). When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3394

Modular Equations and Distortion Functions

Modular equations occur in number theory, but it is less known that such equations also occur in the study of deformation properties of quasiconformal mappings. The authors study two important plane quasiconformal distortion functions, obtaining monotonicity and convexity properties, and finding sharp bounds for them. Applications are provided that relate to the quasiconformal Schwarz Lemma and to Schottky's Theorem. These results also yield new bounds for singular values of complete elliptic integrals.Comment: 23 page

Andreev reflection between a normal metal and the FFLO superconductor II: a self-consistent approach

We consider Andreev reflection in a two dimensional junction between a normal metal and a heavy fermion superconductor in the Fulde-Ferrell (FF) type of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. We assume s-wave symmetry of the superconducting gap. The parameters of the superconductor: the gap magnitude, the chemical potential, and the Cooper pair center-of-mass momentum Q, are all determined self-consistently within a mean-field (BCS) scheme. The Cooper pair momentum Q is chosen as perpendicular to the junction interface. We calculate the junction conductance for a series of barrier strengths. In the case of incoming electron with spin \sigma = 1 only for magnetic fields close to the upper critical field H_{c2}, we obtain the so-called Andreev window i.e. the energy interval in which the reflection probability is maximal, which in turn is indicated by a peak in the conductance. The last result differs with other non-self-consistent calculations existing in the literature.Comment: 15 pages, 6 figures, accepted in Physica