Stochastic Differential Equations for Quantum Dynamics of Spin-Boson Networks

The quantum dynamics of open many-body systems poses a challenge for computational approaches. Here we develop a stochastic scheme based on the positive P phase-space representation to study the nonequilibrium dynamics of coupled spin-boson networks that are driven and dissipative. Such problems are at the forefront of experimental research in cavity and solid state realizations of quantum optics, as well as cold atom physics, trapped ions and superconducting circuits. We demonstrate and test our method on a driven, dissipative two-site system, each site involving a spin coupled to a photonic mode, with photons hopping between the sites, where we find good agreement with Monte Carlo Wavefunction simulations. In addition to numerically reproducing features recently observed in an experiment [Phys. Rev. X 4, 031043 (2014)], we also predict a novel steady state quantum dynamical phase transition for an asymmetric configuration of drive and dissipation.Comment: 15 pages, 8 figure

Sets Represented as the Length-n Factors of a Word

In this paper we consider the following problems: how many different subsets of Sigma^n can occur as set of all length-n factors of a finite word? If a subset is representable, how long a word do we need to represent it? How many such subsets are represented by words of length t? For the first problem, we give upper and lower bounds of the form alpha^(2^n) in the binary case. For the second problem, we give a weak upper bound and some experimental data. For the third problem, we give a closed-form formula in the case where n <= t < 2n. Algorithmic variants of these problems have previously been studied under the name "shortest common superstring"

Arthroskopische Behandlung des femoroazetabulären Impingements

Zusammenfassung: Eine erst kürzlich etablierte, aber häufige Ätiologie der Hüftschmerzen beim jungen Erwachsenen ist das femoroazetabuläre Impingement (FAI), das eine leichte Form der frühzeitigen degenerativen Erkrankung des Hüftgelenks darstellt. Die klinischen Aspekte und diagnostischen Möglichkeiten sollen im Folgenden diskutiert und eine komplett arthroskopische Korrektur dieser Pathologie präsentiert werden. Mit dieser Technik können die azetabuläre Komponente ebenso wie die pathologischen Veränderungen am Femurkopf behandelt werden. Das schließt — falls notwendig — auch eine Labrumnaht mit ein. Neurologische Komplikationen durch lange Distraktionszeiten können durch die Anwendung einer invasiven Distraktionsmethode vermieden werden. Die Ergebnisse der arthroskopischen Behandlung sind mit denen der offenen chirurgischen Technik vergleichba

Use of Non-distractive Testing AU-E Technology to Evaluate Hearth Conditions at CherMK–SEVERSTAL

Intensive operation of blast furnace allows increase in production of hot metal and profitability of Iron &amp; Steel Works. However, blast furnace life could be sacrificed if no measures are taken to protect refractory lining and to build stable accretion. CherMK and Hatch developed a systematic approach to monitor conditions of BF hearth lining using Acousto Ultrasonic-Echo (AU-E) non-destructive testing developed by Hatch. Multiple testing of blast furnaces revealed problematic areas with accelerated refractory deterioration and minimal thickness, formation of elephant foot, extent of accretion and speed of refractory wear, cracks and other anomalies. Improvement in coke quality, periodical staves washing, the addition of titania, grouting, etc., were recommended and implemented to prolong furnace life while maintaining the intensity of furnace operation. Keywords: blast furnace inspection and monitoring, non-destructive testing (NDT), refractory deterioration, blast furnace campaig

Beyond Strong Coupling in a Massively Multimode Cavity

The study of light-matter interaction has seen a resurgence in recent years, stimulated by highly controllable, precise, and modular experiments in cavity quantum electrodynamics (QED). The achievement of strong coupling, where the coupling between a single atom and fundamental cavity mode exceeds the decay rates, was a major milestone that opened the doors to a multitude of new investigations. Here we introduce multimode strong coupling (MMSC), where the coupling is comparable to the free spectral range (FSR) of the cavity, i.e. the rate at which a qubit can absorb a photon from the cavity is comparable to the round trip transit rate of a photon in the cavity. We realize, via the circuit QED architecture, the first experiment accessing the MMSC regime, and report remarkably widespread and structured resonance fluorescence, whose origin extends beyond cavity enhancement of sidebands. Our results capture complex multimode, multiphoton processes, and the emergence of ultranarrow linewidths. Beyond the novel phenomena presented here, MMSC opens a major new direction in the exploration of light-matter interactions.Comment: 14 pages, 11 figures. References added, typos correcte

Quantitative growth of I.R Iran’s TVE graduates and skilled human resources with the aim of revising and reinforcing the curriculum

Background and Objectives:Education has been considered as the most basic factor of sustainable development in our country. Increasing acceptance of education at all levels increases the need to pay attention to superior quality, effective management and adaptation of education to the needs of society and the characteristics of the twenty-first century. Development of technical and vocational education needs special attention due to the limitations of universities and ways to achieve higher education and the need for youth employment, and especially the unemployment of university graduates. In addition, at this time, special attention should be paid to technical and vocational training as the main weapon of global competition. In addition to the secondary and associate level, technical and vocational training programs in Iran have been officially upgraded to the level of bachelor degree. Social demand for these trainings, especially at the associate level, has led to areas of development and special attention to these trainings. Given the importance of endogenous development and reliance on domestic forces in various aspects of economic, social and cultural development as a result of sustainable development, training skilled and efficient forces that can accelerate the movement of economic wheels and the country from dependence on skilled forces and foreign expert, technical and vocational training is of particular importance. But technical and vocational training can claim to fulfil this mission when its products are in harmony with the needs of the labour market, both quantitatively and qualitatively. In other words, the technical and professional graduate has been trained in the fields that the labour market needs and is equipped with techniques and skills that can meet the needs of companies and employers. If education development programs are carefully and quantitatively and qualitatively evaluated, they would clarify valuable issues whose results due to the long-term impact of education on society, can help education planners and decision makers and foster help to use the results of this review and evaluation in order to develop better and more complete programs for the development of education. Consequently, the present study compares the supply of technical and vocational graduates with the demand for manpower in this sector and includes examining the external efficiency and employment of graduates and comparing the supply and demand of trained personnel in the technical and vocational associate sector, disciplines and specialized groups. Methods: In this research, a descriptive survey method has been used. The graduate research questionnaire in collaboration with Colombo College was selected as the basis for this evaluation. The statistical population consisted of colleges and technical and vocational schools under the Ministry of Education at the time. In sampling, 24 fields and 69 centres (using multi-stage cluster sampling) were sampled. Findings: According to the research results, there is a moderate significant relationship between the job and gender of graduates. Also, 76% of employees have found jobs related to their education and only 22% of employees are self-employed; Cramer’s correlation coefficient has reported very high and effective. The relationship between gender and employment problems has also been reported to be significant. The results also show that in order to achieve the employment of technical and vocational graduates, another 63% of job opportunities are needed for 163 thousand people. Conclusion: The results show that in order to increase the real effectiveness of technical and vocational education in the country, the curriculum should include changes tailored to the needs and requirements. Some suggested changes according to the results of this research are: More practical units should be included in technical and vocational courses and disciplines. In theoretical discussions in the technical and professional field, more attention should be paid to issues related to entrepreneurship; and the activities and disciplines that are most attractive in the job market should be expanded. The results of the study show that the retraining ability of graduates is at a low level, so more attention should be paid to the basic courses in the curriculum. Planning for disciplines and centres should be based on land management. Centres should be considered as the centre of integration that have the highest rate of graduate attraction. According to the research results, there is a moderate significant relationship between the job and gender of graduates, that is, although there is a significant relationship between these two components, but it is necessary to make efforts to increase this relationship

Milk-Derived Exosomes and Metabolic Regulation

Exosomes are natural nanoparticles that play an important role in cell-to-cell communication. Communication is achieved through the transfer of cargos, such as microRNAs, from donor to recipient cells and binding of exosomes to cell surface receptors. Exosomes and their cargos are also obtained from dietary sources, such as milk. Exosome and cell glycoproteins are crucial for intestinal uptake. A large fraction of milk exosomes accumulates in the brain, whereas the tissue distribution of microRNA cargos varies among distinct species of microRNA. The fraction of milk exosomes that escapes absorption elicits changes in microbial communities in the gut. Dietary depletion of exosomes and their cargos causes a loss of circulating microRNAs and elicits phenotypes such as loss of cognitive performance, increase in purine metabolites, loss of fecundity, and changes in the immune response. Milk exosomes meet the definition of bioactive food compounds

Bethe Ansatz Equations for General Orbifolds of N=4 SYM

We consider the Bethe Ansatz Equations for orbifolds of N =4 SYM w.r.t. an arbitrary discrete group. Techniques used for the Abelian orbifolds can be extended to the generic non-Abelian case with minor modifications. We show how to make a transition between the different notations in the quiver gauge theory.Comment: LaTeX, 66 pages, 9 eps figures, minor corrections, references adde