Two-point phase correlations of a one-dimensional bosonic Josephson junction

We realize a one-dimensional Josephson junction using quantum degenerate Bose gases in a tunable double well potential on an atom chip. Matter wave interferometry gives direct access to the relative phase field, which reflects the interplay of thermally driven fluctuations and phase locking due to tunneling. The thermal equilibrium state is characterized by probing the full statistical distribution function of the two-point phase correlation. Comparison to a stochastic model allows to measure the coupling strength and temperature and hence a full characterization of the system

Dynamics of multipartite quantum correlations under decoherence

Quantum discord is an optimal resource for the quantification of classical and non-classical correlations as compared to other related measures. Geometric measure of quantum discord is another measure of quantum correlations. Recently, the geometric quantum discord for multipartite states has been introduced by Jianwei Xu [arxiv:quant/ph.1205.0330]. Motivated from the recent study [Ann. Phys. 327 (2012) 851] for the bipartite systems, I have investigated global quantum discord (QD) and geometric quantum discord (GQD) under the influence of external environments for different multipartite states. Werner-GHZ type three-qubit and six-qubit states are considered in inertial and non-inertial settings. The dynamics of QD and GQD is investigated under amplitude damping, phase damping, depolarizing and flipping channels. It is seen that the quantum discord vanishes for p>0.75 in case of three-qubit GHZ states and for p>0.5 for six qubit GHZ states. This implies that multipartite states are more fragile to decoherence for higher values of N. Surprisingly, a rapid sudden death of discord occurs in case of phase flip channel. However, for bit flip channel, no sudden death happens for the six-qubit states. On the other hand, depolarizing channel heavily influences the QD and GQD as compared to the amplitude damping channel. It means that the depolarizing channel has the most destructive influence on the discords for multipartite states. From the perspective of accelerated observers, it is seen that effect of environment on QD and GQD is much stronger than that of the acceleration of non-inertial frames. The degradation of QD and GQD happens due to Unruh effect. Furthermore, QD exhibits more robustness than GQD when the multipartite systems are exposed to environment.Comment: 15 pages, 4 figures, 4 table

Pneumothorax complicating isolated clavicle fracture

Isolated clavicle fractures are among the commonest of traumatic fractures in the emergency department. Complications of isolated clavicle fractures are rare. Pneumothorax has been described as a complication of a fractured clavicle only rarely in English literature. In all the reported cases, the pneumothorax was treated by a thoracostomy and the clavicle fracture was treated conservatively. In our case, the pneumothorax required a chest drain insertion and the clavicle fracture was treated surgically with good result

The sudden change phenomenon of quantum discord

Even if the parameters determining a system's state are varied smoothly, the behavior of quantum correlations alike to quantum discord, and of its classical counterparts, can be very peculiar, with the appearance of non-analyticities in its rate of change. Here we review this sudden change phenomenon (SCP) discussing some important points related to it: Its uncovering, interpretations, and experimental verifications, its use in the context of the emergence of the pointer basis in a quantum measurement process, its appearance and universality under Markovian and non-Markovian dynamics, its theoretical and experimental investigation in some other physical scenarios, and the related phenomenon of double sudden change of trace distance discord. Several open questions are identified, and we envisage that in answering them we will gain significant further insight about the relation between the SCP and the symmetry-geometric aspects of the quantum state space.Comment: Lectures on General Quantum Correlations and their Applications, F. F. Fanchini, D. O. Soares Pinto, and G. Adesso (Eds.), Springer (2017), pp 309-33

Development of a Neural Network approach for Predicting nitrate and sulfate concentration in three lakes: Ifrah, Iffer and Afourgagh, Middle Atlas Morocco

Neural networks are mathematical and computer models to power nonlinear data that play a very important role in various scientific fields. They are specially used for automatic resolution of environmental problems.This study focuses on the prediction of nitrate (NO3-) and sulfate (SO42-) of lake water in the Moroccan Middle Atlas. Ifrah, Iffer and Afourgagh are taken as case studies by using a number of parameters physic-chemical of water. Two methods were used: Multiple Linear Regression (MLR) and Artificial Neural Networks (ANN) Multilayer Perceptron Model (MLP).In order to choose the best neural network architecture, several statistical tests were used in conjunction with some robustness tests: Mean Square Error (MSE), mean absolute error (MAE) and correlation coefficient (R).The results showed that the models established by artificial neural network Multilayer Perceptron type (ANN-MLP) of configuration [17-8-2] are more efficient compared to those determined by the conventional method based on multiple linear regression.This performance demonstrates the existence of a nonlinear relationship between the physic-chemical characteristics of both nitrates and sulfates in the lakes waters studied that are under investigation

Identifying effluents from a food processing industry

The agri-food industry in Morocco generates significant volumes of liquid waste, contributing to environmental challenges that directly impact public health. To address this issue, it is crucial to characterize this wastewater comprehensively, enabling the development of suitable treatment strategies to alleviate pollution and potentially facilitate recycling. This study focuses on the identification of effluents from an olive and caper preservation industry, employing physicochemical and bacteriological analyses on raw, decanted, and filtered effluent samples. The findings reveal that the effluent from the olive and caper preservation industry is characterized by high acidity and an exceptionally elevated mineral load. Notably, the application of decantation and filtration methods demonstrates a limited influence, primarily affecting the reduction of suspended solids. Understanding these physicochemical and bacteriological characteristics is pivotal for devising targeted treatment protocols, ensuring effective pollution reduction, and exploring avenues for potential recycling of this agri-food industry wastewater. This research serves as a foundation for informed decision-making in the development of sustainable and efficient wastewater management practices, balancing environmental preservation with industrial needs

A time predefined variable depth search for nurse rostering

This paper presents a variable depth search for the nurse rostering problem. The algorithm works by chaining together single neighbourhood swaps into more effective compound moves. It achieves this by using heuristics to decide whether to continue extending a chain and which candidates to examine as the next potential link in the chain. Because end users vary in how long they are willing to wait for solutions, a particular goal of this research was to create an algorithm that accepts a user specified computational time limit and uses it effectively. When compared against previously published approaches the results show that the algorithm is very competitive

Performances d'engraissement et caractéristiques des carcasses d'agneaux issus du croisement des brebis de races Timahdite, Sardi et Béni Guil avec des béliers de races à viande

L'analyse des performances d'engraissement et des caractéristiques de carcasses de 242 agneaux issus du croisement des brebis de races Timahdite, Sardi et Béni Guil avec des béliers de leurs races respectives et avec des béliers de races Île de France, Suffolk et Mérinos Précoce a montré que les performances des agneaux croisés sont meilleures que celles des agneaux de races pures. De plus, parmi les races à viande, il semble que la race Île de France est celle qui conviendrait le mieux au croisement avec les brebis de races locales marocaines.Fattening performance and carcass characteristics of crossbred lambs born to Timahdite, Sardi and Béni Guil ewes and rams of meat breedsThe analysis offattening performance and carcass characteristics of 242 lambs born to Timahdite, Sardi and Béni Guil ewes mated to rams of their respective breeds and to rams of Ile de France, Suffolk and Mérinos Précoce showed a superiority of crossbred over purebred lambs. Moreover, among the three meat breeds, it seems that Ile de France is the most suitable breed to be crossed to ewes of Moroccan native breeds

Milk production of ewes of Timahdite, Sardi and Béni Gull breeds in purebreeding and crossbreeding

La production laitière, durant 8 semaines de lactation, de 144 brebis de races Sardi, Béni Guil et Timahdite luttées par les béliers de leurs races respectives et par ceux des races Île de France, Mérinos Précoce et Suffolk a été estimée par la méthode de pesée avant et après tétée (PAAT) pendant trois années. L'étude a montré que la production laitière est influencée par la race de la brebis mais non par la race du bélier, et que les agneaux issus de pères de races île de France, Suffolk et Sardi transforment mieux le lait que ceux issus des autres races de pères. Il semble impératif de supplémenter les agneaux croisés à partir du 2ème mois d'âge.Milk production of ewes of Timahdite, Sardi and Béni Gull breeds in purebreeding and crossbreedingEight weeks milk production of 144 Sardi, Béni Guil and Timahdite ewes mated to rams of their respective breeds and to rams of Île de France, Mérinos Précoce and Suffolk breeds was estimated during three years by the method of weighting lambs before and after suckling. Milk production was affected by the breed of ewe but not the breed of ram, Lambs sired by île de France, Suffolk and Sardi rams had a better milk efficiency than those produced by rams ofthe other breeds. It seems necessary to supplement crossbred lambs from the age oftwo months

Agronomic valorization of the composts with olive waste

In the Mediterranean countries, olive waste, a co-product of the olive oil trituration process, presents a serious environmental problem because of their polyphenol charge, given the quantities rejected each year. In previous works, this waste has been co-composted with other substrates and has been transformed into non-phytotoxic substances in conformity with the French standard NFU44-051 due to their composition in nutritional elements like soluble sugars, proteins and mineral elements. This study examines the efficacy of these substances on radish and potato crops. To do this, seeds were sown on the plot. For each crop, 4 plots were planned: land amended with manure (M), NPK fertilizer (F), the vegetable water substance (VW) and the olive-pomace substance (OP) in addition to the vegetable water. The first three substances served as controls. A statistical study of correlation between the latter and those that characterize the soil after amendment was carried out.  The obtained results showed that there are two strong correlations between pH, organic matter, dry matter and soil moisture amended by the OW compost and, on the one hand, the morphological growth parameters of the two crops and, on the other hand, the parameters of their production