Simple Floating Voltage-Controlled Memductor Emulator for Analog Applications

The topic of memristive circuits is a novel topic in circuit theory that has become of great importance due to its unique behavior which is useful in different applications. But since there is a lack of memristor samples, a memristor emulator is used instead of a solid state memristor. In this paper, a new simple floating voltage-controlled memductor emulator is introduced which is implemented using commercial off the shelf (COTS) realization. The mathematical modeling of the proposed circuit is derived to match the theoretical model. The proposed circuit is tested experimentally using different excitation signals such as sinusoidal, square, and triangular waves showing an excellent matching with previously reported simulations

Some Physical Properties of Cubic System Miscellaneous Compounds

The norm of elastic constant tensor and the norms of the irreducible parts of the elastic constants of different types of cubic system miscellaneous compounds are calculated. The relation of the scalar parts norm and the other parts norms and the anisotropy of these compounds are characterized. The norm ratios are used to study anisotropy of these compounds

Anısotropy of some haxagonal systems

The norm of elastic constant tensor and the norms of the irreducible parts of the elastic constants of some hexagonal systems (Apatite Fluor apatite, Hydroxyapatite, Beryl, Beryllium, Beryllium oxide, Biotite, Cadmium, Cadmium selenide, Cadmium sulfide, Cadmium telluride, Cesium copper chloride, Calcium-magnesium, Cancrinite, Cerium fluoride, Cobalt, Cobalt nickel, Co – 32 wt % Ni, Copper chloride, Dunite, Dysprosium, Erbium, Gadolinium, Gadolinium-yttrium, Gd – 40 at % Y, Gallium selenide, Graphite, Hafnium, Holmium, Indium bismuth, Indium selenide, Lead germinate vanadate, Lithium iodate, Lithium iodate, Yttrium, Zinc oxide (Zincite), Zinc selenide,and Zinc telluride) are calculated. The relation of the scalar parts norm and the other parts norms and the anisotropy of the materials are presented. The norm ratios are used as a criterion to present the anisotropy degree of the properties of these materials.&nbsp

Anısotropy of Dıfferent Types of Alloys

The norm of elastic constant tensor and the norms of the irreducible parts of the elastic constants of the alloys Iron-Silicon at different percentages of Silicon, Lead-Indium at different percentages of Indium, Molybdenum-Rhenium at different percentages of Rhenium, Niobium-Hydrogen at different percentages of Hydrogen, Niobium-Molybdenum at different percentages of Molybdenum, Niobium-Oxygen at different percentages of Oxygen, Niobium-Zirconium at different percentages of Zirconium, Palladium-Rhodium at different percentages of Rhodium, Palladium-Rhodium at different percentages of Rhodium, and Palladium-Silver at different percentages of Silver are calculated. The relation of the scalar parts norm and the other parts norms and the anisotropy of the alloys are presented. The norm ratios are used as a criterion to present the anisotropy degree of the properties of the alloys.&nbsp

Non-Universality in Semi-Directed Barabasi-Albert Networks

In usual scale-free networks of Barabasi-Albert type, a newly added node selects randomly m neighbors from the already existing network nodes, proportionally to the number of links these had before. Then the number N(k) of nodes with k links each decays as 1/k^gamma where gamma=3 is universal, i.e. independent of m. Now we use a limited directedness in the construction of the network, as a result of which the exponent gamma decreases from 3 to 2 for increasing m.Comment: 5 pages including 2 figures and computer progra

DESTRUCTION OF CONIFER SEED AND METHODS OF PROTECTION

ABSTRACT: Agents responsible for tosses of conifer seed and methods for seed protection are reviewed. Published information indicates that much seed is destroyed, especially by seed-eating rodents and birds. Improvement of existing protective methods and development of new chemical means are necessary to overcome the problem

Simulation of Demographic Change in Palestinian Territories

Mortality, birth rates and retirement play a major role in demographic changes. In most cases, mortality rates decreased in the past century without noticeable decrease in fertility rates, this leads to a significant increase in population growth. In many poor countries like Palestinian territories the number of births has fallen and the life expectancy increased. In this article we concentrate on measuring, analyzing and extrapolating the age structure in Palestine a few decades ago into future. A Fortran program has been designed and used for the simulation and analysis of our statistical data. This study of demographic change in Palestine has shown that Palestinians will have in future problems as the strongest age cohorts are the above-60-year olds. We therefore recommend the increase of both the retirement age and women employment.Comment: For Int. J. Mod. Phys. C 18, issue 11; 9 pages including figures and progra

An Investigation into the Approaches to the Evaluation of Training in Libyan Iron and Steel Company (LISCO)

This thesis investigated the approaches concepts and techniques concerning Training Evaluation within organisations as a means of contributing to the assertion that training and development can provide added value for an organisation in a non-western context. In light of this the HRD policies and strategies available and the barriers which can exist to these strategies in those countries in the Arab world, like Libya, where considered. Additionally the paradigm that in transitional countries emphasise should be placed on encouraging training and improving performance is investigated. An interpretive research philosophy was applied and led to a qualitative design being chosen for this research as it required the creation of researchable questions which were salient to target respondents. The case chosen to be studied is the Libyan Iron and Steel Company (LISCO). An exploratory study was carried out involving a review of documentary evidence acquired from LISCO which included a survey of employees’ views on training within the company. The questioning of respondents to this study involved the use interviews managers of departments and professional training staff in the company were asked for their views to compare with those of the employees. In this study certain factors were grouped into themes, Arab Culture and the difficulties facing many transitional economies given the nature of the national and organisational culture in countries like Libya show that Western developed models of training and training evaluation cannot be universally applied. Organisations in Libya are typically state controlled and operate on strict hierarchical basis. This study proposes that in the current level of economic development Libyan organisations would benefit from a training evaluation model that focuses on a performance improvement perspective. The Training evaluation for transitional countries model proposed contributes to knowledge because it comes from the Libyan context. Any model of training evaluation considered for Libya or any transitional economy must combine the positive attribute of Western theoretical models with new elements specific to countries environment. This thesis is unique as it contributes to our understanding of models of HRD, and Evaluation practice by exploring their implementation and barriers to their use in an Arabic country that is in transition from a centralised economy to a more privatised one. Furthermore it investigates the transferability of western training evaluation practices to the Libyan environment A conclusion reached from this study is that any national policy that is introduced by the new Libyan government needs to include some radical reforms at national, sectoral and local levels. The Training evaluation for transitional countries model, although only a theory will serve as a guide to others embarking on similar research

Power Dissipation of Memristor-Based Relaxation Oscillators

Recently, many reactance-less memristive relaxation oscillators were introduced, where the charging and discharging processes depend on memristors. In this paper, we investigate the power dissipation in different memristor based relaxation oscillators. General expressions for these memristive circuits as well as the power dissipation formulas for three different topologies are derived analytically. In addition, general expressions for the maximum and minimum power dissipation are calculated. Finally, the calculated expressions are verified using PSPICE simulations showing very good matching