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Karmiel, Israel

ORT Braude Academic College of Engineering is established on a 30-acre area in a city of Karmiel, Israel. The College’s geographic location is a direct response to national and regional needs: it serves as an academic, technological, and scientific center for the Galilee, increases the accessibility to higher education in the north of Israel and contributes to the range and enrichment of Karmiel’s educational system. The College offers a wide range of studies and training for careers in the latest technologies. At the present, there are more than 5500 students studying in Ort Braude – most of them are being trained for a B.Sc. degree in Engineering. Ort Braude considered to be one of the leading higher education institutions for Engineering in Israel. All of its educational programs are approved by the "council for higher education" of Israel, which means that its academic degree is respected worldwide and in Israel. The College's activities are concentrated in six areas:Pre-academic educationTraining students in engineering technologies, resulting in a Bachelor of Science in Engineering degree ;Studies of mathematics, resulting in a Bachelor of Science degree in Applied Mathematics;Training students in Practical engineering technologies, resulting in a diploma ;Preparing students for careers in industrial engineering in the public and business sectors;Studies from a diverse list of subjects through the College's Continuing Education Department;Services to industry and the community at the College's modern facilities and from its exceptional faculty. Wikipedia.

Dror S.,ORT Braude College
Quality and Reliability Engineering International

Reliability is an important factor in the management, planning, and design of an engineering product. In order to meet the customer's requirements and achieve desired reliability level, different types of activities should be performed by the system developer/manufacturer. These activities have to be listed in corresponding reliability program and include: inspection, spare parts storage/providing, failure analysis, etc. On one hand, each activity from reliability program list requires some cost for its realization. On the other hand, when any activity was not performed, we should expect some losses because of system's failures. This paper presents an innovative method that enables a company to determine its vital activities in reliability program. The method is based on a House of Reliability Costs for translating the system's failure costs into relative importance of corresponding activities listed in the reliability program. A Mean Square Error (MSE) criterion supports the selection of vital reliability program activities. It divides a set of activities in reliability program into two groups: vital few (activities in reliability program) and trivial many. The partition minimizes the overall MSE and so, delineates two homogeneous groups. A case study is presented to illustrate the application of the developed methodology in a warfare system. The vital reliability program activities - treatment routine and spare parts storage - were found to be the best activities for reducing the costs of the warfare failures. Copyright © 2013 John Wiley & Sons, Ltd. Copyright © 2013 John Wiley & Sons, Ltd. Source

Masri R.,ORT Braude College
International Journal of Impact Engineering

The effect of adiabatic thermal softening on specific cavitation energy of metals is analytically investigated with respect to ballistic limit predictions. Explicit stress-plastic strain relation that includes strain hardening response, thermal softening effect and constant strain rate sensitivity is obtained from Johnson-Cook integral equation under adiabatic conditions and an analogous stress-strain relation is suggested for the Ludwik hardening model. Extensions of these two adiabatic curves for an arbitrary strain hardening response are derived from generalized integral equations and an example for the Voce hardening model is demonstrated. Adiabatic thermal softening is found to be governed by an exponential decay which is controlled by two nondimensional softening parameters and the strain hardening effect while increase of yield stress by a constant strain rate response leads to an increase of the thermal softening effect. Decrease of spherical and cylindrical, plane-strain and plane-stress, specific cavitation energies due to adiabatic thermal softening is quantified for several aluminium and Weldox steel alloys and reveals an effect of 2-21% with the greatest impact on aluminium 7075-T651 plates under plane-stress conditions. This effect is reduced by a factor of two in ballistic limit predictions but is intensified in estimations of low residual velocities via striking velocities that are close to the ballistic limit. Comparison of theory predictions with simulation results and experimental data for several aluminium and Weldox steel alloys demonstrates the validity of the present analytical model.©2014 Elsevier Ltd. All rights reserved. Source

Fleischer A.,Solid State Institute | Fleischer A.,ORT Braude College | Kfir O.,Solid State Institute | Diskin T.,Solid State Institute | And 2 more authors.
Nature Photonics

The roles of energy, momentum and orbital angular momentum conservation in high-harmonic generation were studied in the past. Here, we explore the role of spin angular momentum in high-harmonic generation by experimentally generating high harmonics of bichromatic elliptically polarized pump beams that interact with isotropic media. We explain qualitatively many observed intricate selection rules with a model that includes spin conservation in the conversion of many pump photons into a single photon. However, we also observe unequivocal deviations from this model, indicating that emission of an elliptically polarized high-energy photon is accompanied by an additional excitation (radiative or electronic). The presented results are also important for applications, because our system exhibits full control over the polarization of the harmonics, from circular through elliptical to linear polarization, without compromising the efficiency of the process. This work paves the way for a broad range of applications with high-harmonic generation, including ultrafast circular dichroism of molecules and magnetic materials. © 2014 Macmillan Publishers Limited. Source

Sabban A.,ORT Braude College
IEEE Transactions on Antennas and Propagation

Biomedical industry is in continuous growth in the last few years. Low profile compact antennas are crucial in the development of wearable human biomedical systems. The polarization of the proposed antenna may be linear or dual polarized. Design considerations, computational results and measured results on the human body of several compact wideband microstrip antennas with high efficiency at 434~{\rm MHz}\pm 5\% are presented in this paper. The compact dual polarized antenna dimensions are 5× 5× 0.05 cm. The antenna beam width is around 100\circ. The antennas gain is around 0 to 2 dBi. The proposed antenna may be used in Medicare RF systems. The antennas S11 results for different belt thickness, shirt thickness and air spacing between the antennas and human body are presented in this paper. If the air spacing between the new dual polarized antenna and the human body is increased from 0 mm to 5 mm the antenna resonant frequency is shifted by 5%. © 1963-2012 IEEE. Source

We evaluate the influence of thermal fluctuations on superconducting rings that enclose a magnetic flux, using the time-dependent Ginzburg-Landau model (TDGL) or the Kramer-Watts-Tobin model (KWT), while thermal fluctuations are accounted for by means of Langevin terms. This method is applicable in situations where previous methods are not, such as for nonuniform loops, rings with large width to radius ratio and loops with large coherence length to perimeter ratio. We evaluate persistent currents, the position and statistical behavior of flux-induced vortices, and the lifetime of metastable fluxoid states. The influence of nonuniformity on the persistent current does not depend strongly on the details of the cross section profile; it depends mainly on its first harmonic, but not only on it. As a consequence of nonuniformity the maximum of the persistent current shifts to smaller fluxes and the passage between fluxoid states remains non-hysteretic down to lower temperatures than in the case of a uniform sample. Our results obtained using TDGL agree remarkably well with recent measurements of the persistent current in superconducting rings and with measurements of the position of a vortex that mediates between fluxoid states in an asymmetric disc with a hole; they could also provide a plausible explanation for the unexpectedly short measured lifetimes of metastable states. Comparison of TDGL and KWT indicates that they lead to the same results for the persistent current, whereas KWT leads to larger lifetimes than TDGL. © 2011 IOP Publishing Ltd. Source

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