Entanglement of internal and external angular momenta of a single atom

We consider the exchange of spin and orbital angular momenta between a circularly polarized Laguerre-Gaussian beam of light and a single atom trapped in a two-dimensional harmonic potential. The radiation field is treated classically but the atomic center-of-mass motion is quantized. The spin and orbital angular momenta of the field are individually conserved upon absorption, and this results in the entanglement of the internal and external degrees of freedom of the atom. We suggest applications of this entanglement in quantum information processing.Comment: 4 pages, 2 figure

Best Points Selection Procedure for Estimating Location and Scatter in Multivate Data with Application to Discriminant Analysisari

Multivariate data analysis is rely on the two measures namely location and scatter. The most widely used such estimators; sample mean and covariance matrix are extremely sensitive to outliers, then the results obtained with these estimators are inaccurate. Many robust alternatives are established and perform well while handling the data with outliers. But even still a challenging task while handling the large number of cases and/or variables with reference to the features such as dimensionality of data, heterogeneous of data, computing time, adequacy of the results and applications. This paper provides a procedure for the selection of best data points in order to estimate multivariate location and scatter. The obtained results also compared with the established robust procedures such as various MCD algorithmic techniques and MVE by a real environment. The application aspect of the procedure is also executed in the context of discriminant analysis of multivariate grouped data. The results such as apparent error rate, confusion matrix of classical and various robust discriminant procedures are also provided

Correlation between yield, quality, and petiole nutrients in grapes

The correlation coefficients between the N, P, K, Ca and Mg content of petioles and their ratios with yield and quality attributes were established in grapes. Significant negative correlations were observed between nitrate N and P, P ancl Ca as well as P with Mg in the petioles. Accumulation of Ca was synergistic with that of Mg. Yield was negatively correlated to nitrate N, N/P, Ca + Mg/K and total cation nutrients (N + P). P, N/K and cation/anion ratio were positively related to the yield of grapes. With regard to quality attributes, K, Mg ancl N/K influenced the Brix in a positive manner. The Ca content in the petiole showed a negative relationship with acidity. Further, Ca/Mg and cation/anion ratios exhibited a significant positive association with the Brix/acid ratio. The total cation nutrients exhibited a strong positive correlation with the cation/anion ratio, but the total anion nutrients was negatively correlated with the ratio.Korrelation zwischen Ertrag, Mostqualität und Nährstoffgehalt in den Blattstielen von RebenDie Korrelationskoeffizienten zwischen dem Gehalt der Blattstiele an N, P, K, Ca und ihren Mengenverhältnissen einerseits und den Ertrags- und Qualitätseigenschaften der Rebe andererseits wurden ermittelt. Signifikant negative Korrelationen wurden beobachtet zwischen Nitrat-N und P, P und Ca sowie P und Mg df:r Blattstiele. Die Akkumulation des Ca erfolgte synergistisch mit der des Mg. Der Ertrag war negativ korreliert mit Nitrat-N und den Verhältnissen N/P, Ca + Mg/K sowie mit dem Gesamt-Kationengehalt (N + P). P, N/K und das Kationen/Anionen- Verhältnis war,;;n positiv korreliert mit dem Ertrag der Reben. K, Mg und N/K beeinflußten das Mastgewicht positiv. Der Ca-Gehalt im Blattstiel zeigte eine negative Beziehung zur Säure. Außerdem ergab sich für die Verhältnisse Ca/Mg und Kationen/Anionen eine signifikant positive Bindung an das Verhältnis Mastgewicht/Säure. Der Gesamtgehalt an Kationen zeigte eine enge positive Korrelation zum Kationen/AnionenVerhältnis, während der Gesamtgehalt der Anionen mit diesem Verhältnis negativ korreliert war

DoWitcher: Effective Worm Detection and Containment in the Internet Core

Enterprise networks are increasingly offloading the responsibility for worm detection and containment to the carrier networks. However, current approaches to the zero-day worm detection problem such as those based on content similarity of packet payloads are not scalable to the carrier link speeds (OC-48 and up-wards). In this paper, we introduce a new system, namely DoWitcher, which in contrast to previous approaches is scalable as well as able to detect the stealthiest worms that employ low-propagation rates or polymorphisms to evade detection. DoWitcher uses an incremental approach toward worm detection: First, it examines the layer-4 traffic features to discern the presence of a worm anomaly; Next, it determines a flow-filter mask that can be applied to isolate the suspect worm flows and; Finally, it enables full-packet capture of only those flows that match the mask, which are then processed by a longest common subsequence algorithm to extract the worm content signature. Via a proof-of-concept implementation on a commercially available network analyzer processing raw packets from an OC-48 link, we demonstrate the capability of DoWitcher to detect low-rate worms and extract signatures for even the polymorphic worm

The premium as informational cue in insurance decision-making

Often in insurance decision making, there are risk factors on which the insurer has an informational advantage over the consumer. But when the insurer sets and posts a premium for the consumer to consider, the consumer can potentially use the premium as an informational cue for the loss probability, and thereby to reduce the insurer’s informational advantage. We study, by means of a behavioral model, how consumers would use the premium as an informational cue in such contexts. The belief formation process in our model assumes that both prior knowledge and the premium (as a proportion of the compensation) might have an impact on the consumer’s estimate of the loss probability. Moreover, the premium impacts the estimate through an anchoring-and-adjustment process. The model potentially leads to violations of rational expectations, with which the consumer overestimates the loss probability beyond what could be inferred from the premium, given the premise that the insurer must seek to break even or earn an expected profit. Our model analysis moreover implies that the frequency of such violations is non-increasing as the premium increases. Lastly, the model implies a generally inverted-U relationship between insurance demand and the premium, so that the demand is upward sloping at low premium levels and downward sloping at high premium levels. A pilot field study and a laboratory experiment provide robust evidence for our model implications and calibrations for its parameters

Interfacial Void Model for Corrosion Pit Initiation on Aluminum

A model for pit initiation during galvanostatic anodic etching of aluminum in acid chloride-containing solutions was developed. The predictions were compared to experimental potential transients and pit-size distributions. The model presumed that pits initiated from subsurface nanoscale voids, which were exposed by uniform corrosion. Void concentrations fit from potential transients depended on times of caustic and acid exposure before etching, in agreement with prior characterization of the voids by positron annihilation measurements. The model yielded realistic predictions of the effect of applied current density and temperature on the potential transients. The effective void concentration was found to increase with the chloride concentration in the etching solution; this suggested that higher chloride concentrations inhibit passivation of newly exposed voids, enhancing their survival probability. On the whole, the interfacial void model provided a promising quantitative description of pit initiation during anodic etching

Intrinsic states of deformed nuclei in the Hartree-Fock (HF) approximation

This paper deals with an application of the HF method to deformed nuclei. The two nucleon interaction used is a non-local separable potential which acts only in relative s-states. The HF equations are solved in the matrix formulation. Calculations are performed for 16O, 20Ne, 24Mg, 28Si, 32S, Ar and 40Ca. The 4p-4h state of 16O is also investigated. Solutions correponding to different kinds of deformation are investigated. Single-particle energies and wave functions are obtained. The intrinsic quadrupole moments are also calculated.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33358/1/0000756.pd