Electronic Systems - Science topic

I am not quite sure what you are asking. If you specify HF/basis and your system has an odd number of electrons, Gaussian will automatically use the UHF algorithm. If you want to use ROHF, you will have to invoke it specifically in the route statement. See the "Examples" tab at https://gaussian.com/hf/

Interesting question for analysis

Contact some of the authors:

I hope they will able to answer you quickly...

You are right Dear Prof. Dr Aga Shahee. Anyway, thank you so much.

In three electrode system: generally the function of counter electrode is supply of current to the system.

Assuming that the penetration of the carbon fiber structure can be neglected as compared to the slit covered by the membrane, that the length of the slit is larger than the wavelength in the spectrum of interest, and applying Huygens–Fresnel principle, my guess is that the directivity in the plane defined by the endpoints of the slit and the microphone is only slightly deteriorated while in the plane perpendicular to the first one there is hardly any directivity left.

Thank you P Venkateshwar Reddy for your answer.

First, you may need to finalize what are the EMI/EMC tests and their severity level, your system will be subjected to. It is always recommended to consider EMI/EMC during the initial stage of design. Several guidelines pertaining to selection of components, PCB layout, wiring, shielding, filter, surge protectors etc. need to be followed in design.

Following links may be helpful.

http://www.emiguru.com/books/edn-designers-guide-paypal/

with pcduino or raspberry pi is very easy

Define conventional? The presence of an unpaired electron and its chemical properties in relation to a SOMO model can be clearly obtained with EPR. If really only a check of the presence of a unpaired electron is desired, a SQUID could suffice. If you want to use an optical technique, and assuming you are dealing with a transition metal complex, you'd have to find a method to take advantage of spin-orbit coupling effects, but that would depend on the particular electronic structure of what you are trying to study.

I don not believe in this way to model climate system as up to now there no clear theory describing climate change correctly.

You may find some useful circuits on the book ELECTRICAL IMPEDANCE TOMOGRAPHY Methods, History and Applications, Edited by David S Holder

The standard wave function (psi function) is not a mapping of orbitals, even though it begins with a particle Hamiltonian before Schroedinger's trick of converting it to wave functions using the de Broglie hypothesis.  This is all just Fourier analysis (just math, no physics) to generate statistical measurement numbers. 

this article will be helpful: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.820.8941&rep=rep1&type=pdf

Dear Sarah,

yes you have to have electrical isolation between the screws and the electrodes of the cell. The normal practice is to put a mica washer between the metallic electrode surface and the nuts of the screw and to make the hole of the screw larger then its diameter. An other solution is to use plastic screws if they are strong enough.

So, the ohmmeter must indicate open loop OL.

However the presence pf large resistance may not act as an effective short circuit between the screw and the metallic plate. But it is a correct practice to isolate the screw from the electrodes.

wish you success

I strongly recommend you to read the work of Martin Ravallion. He is the world's leading researcher on the measurement of poverty in less developed and developing countries. His ground-breaking research has allowed the definition of precisely calculated poverty lines that are comparable across countries. His work has also contributed to understanding the causes and solutions of poverty, including relationship between economic growth and poverty alleviation. It would be very interesting to see if the results obtained through data mining technique are aligned with the findings of Ravallion.

Oha - what a misery!

Aside from not-so-obvious issues like SMD components having a pinout different from the DIP components (rare, but not non-existent), one of the most prevalent sources of problems are MLCC ceramic capacitors: the through-hole variety is quite robust (the leads isolating mechanical stress from the ceramics block), the SMD variety is quite a diva: mechanical stress tends to result in ceramics cracks, which quite often develop into short circuits - within the capacitor or from the cap to a trace underneath the cap.

Not to be forgotten: the smaller pin/pad spacing is prone to shorts between pads (mostly caused by too much solder).

Aside from thorough inspection and appropriate soldering (soldering irons are an absolute no-go regarding capacitors - resort to hot air or IR soldering!), it will help to power the circuit from a power supply with appropriate current limiting capabilities to prevent the biggest disasters and - eventually - allow to observe heat building up before components are charred - enabling intervention and step-by-step repair where necessary.

Wish you success!

today, many papers focus on EMI modelling. so EMI issue of each systems can be predict and simulate. so EMI issue can be studied easily without measurement setups.

an example of EMI modelling can be find in attached file.

Best regard 

Dear Lev,

Please read the following:

1-http://www.pci.uni-heidelberg.de/tc/usr/daniel/qtransport/quantumtransport.html

P. S. Drouvelis, P. Schmelcher and P. Bastian:

Parallel implementation of the recursive Green's function method

Journal of Computational Physics 215 (2006) 741-756

2- Mesoscopic systems: classical irreversibility and quantum coherence

Philosophical Transactions A Vol. 370, 1975

Bernard Barbara

Published 20 August 2012.DOI: 10.1098/rsta.2012.0218

Abstract

Mesoscopic physics is a sub-discipline of condensed-matter physics that focuses on the properties of solids in a size range intermediate between bulk matter and individual atoms. In particular, it is characteristic of a domain where a certain number of interacting objects can easily be tuned between classical and quantum regimes, thus enabling studies at the border of the two. In magnetism, such a tuning was first realized with large-spin magnetic molecules called single-molecule magnets (SMMs) with archetype Mn12-ac. In general, the mesoscopic scale can be relatively large (e.g. micrometre-sized superconducting circuits), but, in magnetism, it is much smaller and can reach the atomic scale with rare earth (RE) ions. In all cases, it is shown how quantum relaxation can drastically reduce classical irreversibility. Taking the example of mesoscopic spin systems, the origin of irreversibility is discussed on the basis of the Landau–Zener model. A classical counterpart of this model is described enabling, in particular, intuitive understanding of most aspects of quantum spin dynamics. The spin dynamics of mesoscopic spin systems (SMM or RE systems) becomes coherent if they are well isolated. The study of the damping of their Rabi oscillations gives access to most relevant decoherence mechanisms by different environmental baths, including the electromagnetic bath of microwave excitation. This type of decoherence, clearly seen with spin systems, is easily recovered in quantum simulations. It is also observed with other types of qubits such as a single spin in a quantum dot or a superconducting loop, despite the presence of other competitive decoherence mechanisms. As in the molecular magnet V15, the leading decoherence terms of superconducting qubits seem to be associated with a non-Markovian channel in which short-living entanglements with distributions of two-level systems (nuclear spins, impurity spins and/or charges) leading to 1/fnoise induce τ1-like relaxation of Sz with dissipation to the bath of two-level systems with which they interact most. Finally, let us mention that these experiments on quantum oscillations are, most of the time, performed in the classical regime of Rabi oscillations, suggesting that decoherence mechanisms might also be treated classically.

3-Interference of Mesoscopic Particles:

Quantum–Classical Transition

P. Facchi

Open Sys. & Information Dyn. (2007) 14:139–148

DOI: 10.1007/s11080-007-9042-6

Abstract. We analyze the double slit interference of a mesoscopic particle. We calculate the visibility of the interference pattern in the far field case, introduce a characteristic temperature that defines the onset to decoherence and scrutinize the conditions that must be satisfied for an interference experiment to be possible.

Hoping this will be helpful,

Rafik

Dear Krunal,

The contact resistance between to metal surfaces brought into contact by firmly pressing them against each other is more probably controlled by the tunneling process of electrons among the a potential barrier formed at the interface between the two metals. If the tunneling barrier height  and width remain unaffected with temperature, the tunneling current density will  remain unchanged with the temperature and consequently the contact resistance. 

If the width of the barrier width is appreciable, the thermionic emission  current may take part in the conduction between the two metals and the contact resistance will decrease in this case with temperature. If the two current conduction mechanism are exiting simultaneously, the contact resistance will increase but with slower rate.

Practically, i expect that the pressure is high enough such that tunneling prevails.

To verify the variation of the contact resistance with temperature you need to directly measure it. It is not difficult to measure it using the four point method where you pass a current through the contact and measure with a voltmeter the voltage drop on the contact resistance.

wish you uccess

Its a common problem that is being often encountered with the previous versions of MATLAB, basically you need to update and install correctly the Microsoft visual studio express. It might be possible that you might still encounter error or the error might be solve.

I suggest you install matlab-2014 to get rid of the problem.

Also refer:http://in.mathworks.com/support/compilers/R2009b/win64.html and choose the compiler according to the version.

good luck.

Have you seen the following papers?

Karsh, B. T., Escoto, K. H., Beasley, J. W., & Holden, R. J. (2006). Toward a theoretical approach to medical error reporting system research and design. Applied ergonomics, 37(3), 283-295.

Vastag, B. (2002). Medical Error Reporting. JAMA, 288(14), 1709-1709.

Cohen, M. R. (2000). Why error reporting systems should be voluntary: they provide better information for reducing errors. BMJ: British Medical Journal, 320(7237), 728.

Leape, L. L. (2002, November). Reporting of adverse events. In N Engl J Med.

Uribe, C. L., Schweikhart, S. B., Pathak, D. S., Marsh, G. B., & Fraley, R. R. (2002). Perceived barriers to medical-error reporting: an exploratory investigation. Journal of Healthcare Management, 47(4), 263.

Dovey, S. M., & Phillips, R. L. (2004). What should we report to medical error reporting systems?. Quality and Safety in Health Care, 13(5), 322-323.

Holden, R. J., & Karsh, B. T. (2007). A review of medical error reporting system design considerations and a proposed cross-level systems research framework. Human Factors: The Journal of the Human Factors and Ergonomics Society, 49(2), 257-276.

Kim, J., & Bates, D. W. (2006). Results of a survey on medical error reporting systems in Korean hospitals. International Journal of Medical Informatics, 75(2), 148-155.

Grant, M. J. C., & Larsen, G. Y. (2007). Effect of an Anonymous Reporting System on Near‐miss and Harmful Medical Error Reporting in a Pediatric Intensive Care Unit. Journal of nursing care quality, 22(3), 213-221.

Handler, S. M., Nace, D. A., Studenski, S. A., & Fridsma, D. B. (2004). Medication error reporting in long term care. The American journal of geriatric pharmacotherapy, 2(3), 190-196.

Thermoplastics need to be evaluated against safety hazards i.e. specially fire and

toxic gas generation in extreme cases. Thermal models for natural cooling are quite

 complex  especially in poorly ventilated surroundings . Optimization of natural cooled heat sinks will have to consider vertical/ horizontal/ serial(one above another )aspects.

So it appears such substitution needs much experimentation to conform to Standards.

 Heat pipes might be an interesting method to help in your design.

 Cheers

Dear prof Farid thanks for your educatove answer. You meant uncorrelated staes can not forn FQHS, and interactions are responsible for its formation? That is fine now, but does the strenght of the interaction, if it is non-zero, matter all? Especially when it is far below the cyclotron gap (weak interaction limit). My impression is that a highly correlated system implies a strongly interacting.

Prof. Liang can you please substantiate your claim if different from Prof. Farid's. Thanks for your reply.

I have an EDA tool for automatic cell layout generation from a SPICE transistor netlist description. If you want to give it a try:

We studied magnetization of Lead NP in attached article.

Michael,

As you say redundancy and interoperability make good engineering sense but somehow I feel that in terms of interoperability marketing and legal might see matters differently. Who would assume legal responsibility when things go wrong if one uses parts from different suppliers even if they all meet ISO and safety standards when manufactured and assembled. Getting manufacturers to agree on a battery level, form factor and motor voltage might, be argued or perceived as being too restrictive in terms ones "right to choose" or its impact on post sales support partners.

In terms of redundancy I do not see why it is not possible to have the equivalent of the skinny spare wheel where one might have, say a smaller inverter in parallel to do as you suggest.

As the vehicle market is brand and post sales service driven the need for a 'differentiator" will be hard to change. I feel human matters will have to change.