Nature of microstructure in pulsar radio emission

We present a model for microstructure in pulsar radio emission. We propose that micropulses result from the alteration of the radio wave generation region by nearly transverse drift waves propagating across the pulsar magnetic field and encircling the bundle of the open magnetic field lines. It is demonstrated that such waves can modify significantly curvature of these dipolar field lines. This in turn affects strongly fulfillment of the resonance conditions necessary for the excitation of radio waves. The time-scale of micropulses is therefore determined by the wavelength of drift waves. Main features of the microstructure are naturally explained in the frame of this model.Comment: 4 pages, submitted to MNRAS Letter

Learning: a very short introduction

A review of Haselgrove, Mark (2016) Learning: A short introduction. Oxford University Press

Identity Trust Framework for iGaming

The online gambling community, or the iGaming industry in the United States has individual solutions and a mix of classic processes to manage universal customer identity but it lacks a standard identity management framework in which to enroll new iGaming users, monitor those users and ensure secure transactions, which leaves it open to identity theft and financial fraud. The iGaming industry offers online poker, sports betting and casino table games. iGaming providers (provider/providers) include companies such as PartyPoker.com, Pokerstars.com, Bovada.com, BetOnline.com among others. An iGaming player (player/players) is anyone who plays to gamble on games through the Internet. This report focuses on the requirements and specification for an Identity Trust Framework to enhance security and privacy in the United States iGaming industry and players.Informatio

Studies of the reproductive biology and of the structure, composition and physiology of the egg of Graphognathus leocoloma Boheman (Coleoptera : Curculionidae): a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Zoology at Massey University

The published information regarding the biology and pest status of Graphognathus leucoloma Boheman is summarized. A study was made of egg development at temperatures ranging from 4 to 37.8°C and relative humidities ranging from 40 to 100%. Egg hatch was frequently very low and showed considerable variability. Median duration of development ranged from about 14 days at 31.5°C to 95-97 days at 15°C, with the developmental-hatching threshold between 12.1 and 13.5°C. Sub-threshold temperatures were lethal. Virtually no hatching occurred below 100% RH but the eggs could withstand considerable dessication and would hatch when moistened. Possible effects of humidity on the duration of development and of parental age on egg viability are also discussed. Some reasons for the very low egg viability are suggested, along with modifications to the experimental design to eliminate them. Studies were made of adult and pupal size, and of longevity, pre-oviposition period and reproductive output. Some reasons for unexpectedly low fecundity and long pre-oviposition period are discussed. The structure of the egg envelopes and the cement in which the eggs are laid was studied, using scanning and transmission electron microscopy, and Nomarski differential interference microscopy. A histo-chemical study of these structures, supplemented by some simple chemical tests, was also made, to elucidate in part their composition. The chorion is thick and composed entirely of protein; some 250,000 aeropyles are scattered over the surface, and its structure is such that it could probably act as a plastron when the egg is submerged. There is no micropyle. Disulphide linkages are probably important in the structure of the chorion, as in many other species, but unlike other beetles so far studied, no crystalline proteins were found. The vitelline membrane was found to be a three-layered structure 0.3-O.5μm thick composed of protein and acid mucopolysaccharides, and to be highly resistant to chemical attack. Waterproofing is probably provided by a layer of lipid on the outer surface of the vitelline membrane. The cement was found to be a complex, variable and heterogeneous mixture of protein and up to five acid mucopolysaccharides, which is unlike that of any other species reported. Some possible functions of the cement and the significance of its composition are suggested. A note on the citation of publications, and the referral to species and their systematic status. Any publication by three joint authors is cited in full the first time it is referred to and thereafter is abbreviated to the form: senior author et al. Publications with more than three joint authors are cited in the form: senior author et al. each time they are cited, including the first. The specific name of any organism is given in full only on the first time it is referred to, and the names of insect species and genera and their taxonomic status are listed in Appendix Five

Real-Time Identification of Parallel Texts from Bilingual Newsfeed

Parallel texts are documents that present parallel translations. This paper describes a simple method that can be deployed on a real-time news feed to create an infinitely growing source of parallel texts in French and English. Our experiment was lead on the Canada Newswire news feed. Given some of its intrinsic properties, it was possible to deploy a relatively simple text matching techniques that rely on language independent cognates such numbers, capitalized words, punctuation and new lines characters. On three week of press releases, our system correctly identified the vast majority of parallel press release. It committed only minor errors on repeated news items

Brane Potentials and Moduli Spaces

It is shown that the supergravity moduli spaces of D1-D5 and D2-D6 brane systems coincide with those of the Coulomb branches of the associated non-abelian gauge theories. We further discuss situations in which worldvolume brane actions include a potential term generated by probing certain supergravity backgrounds. We find that in many cases, the appearance of the potential is due to the application of the Scherk-Schwarz mechanism. We give some examples and discuss the existence of novel supersymmetric brane configurations.Comment: 26 pages, phyzzx.te