Quantum-Hall activation gaps in graphene

We have measured the quantum-Hall activation gaps in graphene at filling factors $\nu=2$ and $\nu=6$ for magnetic fields up to 32 T and temperatures from 4 K to 300 K. The $\nu =6$ gap can be described by thermal excitation to broadened Landau levels with a width of 400 K. In contrast, the gap measured at $\nu=2$ is strongly temperature and field dependent and approaches the expected value for sharp Landau levels for fields $B > 20$ T and temperatures $T > 100$ K. We explain this surprising behavior by a narrowing of the lowest Landau level.Comment: 4 pages, 4 figures, updated version after review, accepted for PR

Samba Openldap Performance in a Simulated Environment

The Information Technology world is developing so fast and it is been reported that Open Source tools will eventually take over proprietary tools in no to distant future. The Open Source Community is integrating its products with that of the proprietary ones and the integration of Windows machines into Linux network is evident of such practices. The purpose of this project is to implement Samba with OpenLDAP in a simulated environment. This implementation is conducted within a virtual environment by simulating the setup of Linux and Windows Operating systems by reducing physical setup of machines. Samba will act as an interface between Linux and Windows, files will be accessible to both server and client. OpenLDAP stores the user accounts and configuration files. A performance test carried out on Samba determining effect on CPU power and Memory usage shows a decrease in the CPU power and an increase in Memory usage

Belimumab : a technological advance for systemic lupus erythematosus patients? Report of a systematic review and meta-analysis

Objectives: To undertake a systematic review and meta-analysis to investigate clinical effectiveness of belimumab for patients with systemic lupus erythematosus (SLE) and antinuclear and/or anti-double-stranded DNA (dsDNA) autoantibodies. Methods: We searched eight electronic databases and reference lists for randomised controlled trials (RCTs) of belimumab against placebo or best supportive care. Quality assessment and random effects meta-analysis were undertaken. Design: A meta-analysis of RCTs. Participants: 2133 SLE patients. Primary and secondary outcome measures: SLE Responder Index (SRI) at week 52. Results: Three double-blind placebo-controlled RCTs (L02, BLISS-52 BLISS-76) investigated 2133 SLE patients. BLISS-52 and BLISS-76 trials recruited patients with antinuclear and/or anti-dsDNA autoantibodies and demonstrated belimumab effectiveness for the SRI at week 52. Ethnicity and geographical location of participants varied considerably between BLISS trials. Although tests for statistical heterogeneity were negative, BLISS-52 results were systematically more favourable for all measured outcomes. Meta-analysis of pooled 52-week SRI BLISS results showed benefit for belimumab (OR 1.63, 95% CI 1.27 to 2.09). By week 76, the primary SRI outcome in BLISS-76 was not statistically significant (OR 1.31, 95% CI 0.919 to 1.855)

Enumeration, Isolation and Identification of Nitrogen-Fixing Bacterial Strains at Seedling Stage in Rhizosphere of Rice Grown in Non-Calcareous Grey Flood Plain Soil of Bangladesh

Non-symbiotic diazotrophic systems for biological nitrogen fixation (BNF) in agriculture are most promising but the possibility for the extension of nitrogen fixation by rice is still speculative. Accordingly, the present study was conducted for the Enumeration, isolation and identification of nitrogen fixing bacterial strains at seedling stage (30 days after seed sowing) in rhizosphere of rice (BR 10, Oryza sativa L.) grown in Non-Calcareous Grey Flood Plain soil of Bangladesh. The soil is classified as ‘Inceptisol’ order and ‘Aquept’ suborder. It was identified as ‘Dhamrai series’, had ‘silt’ texture, pH 7.1 and 5.5 C/N ratio. The present results of the microbial tests on the rice rhizosphere soil evinced that out of 263 isolates, only 91 were branded as nitrogen fixing organisms per gram of soil, which was about 34.6 % of the total isolates. As per selection criteria, four individual strains were considered for identification. Biochemical tests were conducted for proper identification and the selected strains were identified as Enterobacter spp., Klebsiella spp., Bacillus spp. and Azospirllum spp

Influence of silver nitrate (ethylene inhibitor) on cucumber in vitro shoot regeneration

The effect of addition of silver nitrate (AgNO3) on organogenesis of proximal and distal cotyledon and hypocotyl explants of five cucumber (Cucumis sativus L.) cultivars was investigated. Distal cotyledon and hypocotyl were unresponsive while only poor shoot regeneration was observed in proximal cotyledon and hypocotyl explants of all cucumber cultivars. The addition of different concentrations of AgNO3 (10, 30 and 50 µM) to the medium, however, induced shoot regeneration in distal cotyledon except Suyo Long cultivar and effectively increased shoot regeneration response as well as the number of shoots per explant in proximal cotyledon and hypocotyl of all cucumber cultivars

A Machine-Synesthetic Approach To DDoS Network Attack Detection

In the authors' opinion, anomaly detection systems, or ADS, seem to be the most perspective direction in the subject of attack detection, because these systems can detect, among others, the unknown (zero-day) attacks. To detect anomalies, the authors propose to use machine synesthesia. In this case, machine synesthesia is understood as an interface that allows using image classification algorithms in the problem of detecting network anomalies, making it possible to use non-specialized image detection methods that have recently been widely and actively developed. The proposed approach is that the network traffic data is "projected" into the image. It can be seen from the experimental results that the proposed method for detecting anomalies shows high results in the detection of attacks. On a large sample, the value of the complex efficiency indicator reaches 97%.Comment: 12 pages, 2 figures, 5 tables. Accepted to the Intelligent Systems Conference (IntelliSys) 201

Tolerance in chickpea to Meloidogyne javanica

Quarante-sept cultivars de pois chiche ont été testés pour leur résistance ou leur tolérance envers #Meloidogyne javanica en notant leur croissance dans des sols infestés et des sols sans nématodes. En se fondant sur le nombre de galles, la taille de celles-ci, la surface des racines occupée par les galles et le nombre de masses d'oeufs produites, tous les cultivars paraissent sensibles. L'infestation par le nématode provoque un nanisme, un jaunissement, un dessèchement précoce et une chute des feuilles. Une analyse de régression démontre que la hauteur des plants, le poids des pieds, celui des racines et celui des gousses diminuent lorsque l'infestation augmente. La floraison de deux cultivars tardifs, Pant G 114 et Phule G 1, est retardée dans les sols infestés tandis que chez les cultivars précoces cette floraison est soit avancée soit indifférente à l'infestation par le nématode. Le rapport du poids des racines dans les sols infestés et non infestés - seuil de tolérance - démontre que les cultivars Pant G 114, Phule G 1, GNG 146 et Annigini n'ont qu'un faible niveau de tolérance à #M. javanica. Le niveau de tolérance des cultivars Bheema, N 31 et N 39 est d'environ 4,0 oeufs/gr-1 de sol. Dans un sol infesté, l'absorption de calcium par le cultivar tolérant N 31 est plus élevée que par le cultivar non tolérant Phule G 1. Dans un champ infesté par une population mixte de #M. javanica et #M. incognita, les performances des cultivars tolérants prometteurs N 31, N 59, ICCC 42 et de la lignée de croisement ICCV 90043 se sont révélées meilleures que celles des autres génotypes de pois chiche. (Résumé d'auteur