Improving Air Interface User Privacy in Mobile Telephony

Although the security properties of 3G and 4G mobile networks have significantly improved by comparison with 2G (GSM), significant shortcomings remain with respect to user privacy. A number of possible modifications to 2G, 3G and 4G protocols have been proposed designed to provide greater user privacy; however, they all require significant modifications to existing deployed infrastructures, which are almost certainly impractical to achieve in practice. In this article we propose an approach which does not require any changes to the existing deployed network infrastructures or mobile devices, but offers improved user identity protection over the air interface. The proposed scheme makes use of multiple IMSIs for an individual USIM to offer a degree of pseudonymity for a user. The only changes required are to the operation of the authentication centre in the home network and to the USIM, and the scheme could be deployed immediately since it is completely transparent to the existing mobile telephony infrastructure. We present two different approaches to the use and management of multiple IMSIs

Informasi Keuangan dan Non Keuangan terhadap Return Saham di Pasar Perdana

Financial statement and Non Financial statement need investor at initial market (IPO). The underpricing fenomenal in Initial Public Offering (IPO) is investor get positif return in initial market. The one is caused by asimetry informations in initial market. Investor need some informations, but the informations was getting prospectus informations only. And this research explain to test aboute financial statement and non financial statement to return in initial public offering. The sampling of research were 58 manufacturing and non manufacturing were listing in Bursa Efek Indonesia (Idx) at 2002-2004. Sampling method with purposive sampling. The ones must underpricing and prospectus statement full disclosure. The analyse used multiple regretions. To find relations of auditor reputations, emission guarantor reputation, old age company, equity percentage which on the market, ROA, leverage, industrial sector with initial return. Result of analysis indicate that there is two variable having an effect on significance to initial return that is emission guarantor reputation and auditor reputation. Assess significance T for the auditor reputation is 0.037 meaning significance at 5%. While result of test correlation indicate that emission guarantor reputation variable can explain initial return equal to 0.200 or equal to 20% positive to initial return. This result support research which have been done by Balvers ( 1998) that is emission guarantor reputation and auditor reputation have an effect on negativity significance to initial return. Value of significance T for the emission guarantor reputation is 0.044 meaning significance at a = 5%. Result of examination of this corellation indicate that emission guarantor reputation variable can explain initial return -0.306 or equal to 30.6% negative to initial return. Result of this research support research done by Carter and Dark ( 1992) that emission guarantor reputation, procentage share tender, old age company have an effect on negativity significance to initial return

Geology, geochemistry and geochronology of the Songwe Hill carbonatite, Malawi

This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.Songwe Hill, Malawi, is one of the least studied carbonatites but has now become particularly important as it hosts a relatively large rare earth deposit. The results of new mapping, petrography, geochemistry and geochronology indicate that the 0.8 km diameter Songwe Hill is distinct from the other Chilwa Alkaline Province carbonatites in that it intruded the side of the much larger (4 x 6 km) and slightly older (134.6 ± 4.4 Ma) Mauze nepheline syenite and then evolved through three different carbonatite compositions (C1–C3). Early C1 carbonatite is scarce and is composed of medium–coarse-grained calcite carbonatite containing zircons with a U–Pb age of 132.9 ± 6.7 Ma. It is similar to magmatic carbonatite in other carbonatite complexes at Chilwa Island and Tundulu in the Chilwa Alkaline Province and others worldwide. The fine-grained calcite carbonatite (C2) is the most abundant stage at Songwe Hill, followed by a more REE- and Sr-rich ferroan calcite carbonatite (C3). Both stages C2 and C3 display evidence of extensive (carbo)-hydrothermal overprinting that has produced apatite enriched in HREE (<2000 ppm Y) and, in C3, synchysite-(Ce). The final stages comprise HREE-rich apatite fluorite veins and Mn-Fe-rich veins. Widespread brecciation and incorporation of fenite into carbonatite, brittle fracturing, rounded clasts and a fenite carapace at the top of the hill indicate a shallow level of emplacement into the crust. This shallow intrusion level acted as a reservoir for multiple stages of carbonatite-derived fluid and HREE-enriched apatite mineralisation as well as LREE-enriched synchysite-(Ce). The close proximity and similar age of the large Mauze nepheline syenite suggests it may have acted as a heat source driving a hydrothermal system that has differentiated Songwe Hill from other Chilwa carbonatites.Thanks are due to A. Lemon, A. Zabula, C. Mcheka, I. Nkukumila (Mkango Resources Ltd.), É. Deady (BGS) and P. Armitage (Paul Armitage Consulting Ltd.) for logistical support and enthusiastic discussions in the field. This contribution benefitted from reviews by Jindřich Kynický and Ray Macdonald, as well as anonymous reviewers, who we thank for their time and insightful comments. This work was funded by a NERC BGS studentship to SBF (NEE/J50318/1; S208), the NERC SoS RARE consortium (NE/M011429/1) and by Mkango Resources Ltd. AGG publishes with the permission of the Executive Director of the British Geological Survey (NERC)

Continuous removal and recovery of lead by alginate beads, free and alginate-immobilized Chlorella vulgaris

This study examines the possibility of using Chlorella vulgaris cells in repeated lead adsorption/desorption cycles. Alginate beads and immobilized with algal cells were more effective and suitable than free cells. Consistently high lead removal (>90%) and recovery (about 100%) wereachieved. Lead adsorption was mainly via the alginate matrix and minor contribution was made by algae. Free cells were difficult to handle and give inconsistent lead removal and recovery throughout the experiment

Effect of algal density in bead, bead size and bead concentrations on wastewater nutrient removal

Laboratory experiments were performed to study nitrogen and phosphorus uptake by the unicellular green microalga Chlorella vulgaris immobilized in calcium alginate beads. Different cell stockings inbeads, different bead sizes and different algal bead concentrations in wastewaters were tested. Significant higher nutrients reductions were found in bioreactors containing algal beads than the blankalginate beads (without algae). The bioreactor containing algal beads (4 mm diameter) with 1.5 x 106 cells bead-1 (cell stocking) at concentration of 10.66 beads ml-1 wastewater (1:3 bead: wastewater, v/v) achieved complete removal of NH4 +-N and about 95% reduction in phosphate removal within the experimental period (48 h). Algal uptake and adsorption on alginate gels were the major processesinvolved in the removal of N and phosphate from wastewater. Increasing cell stocking in beads did not cause any improvement in the efficiency of treatment, but caused some leakage problems. Also, increasing the beads concentrations in wastewater caused reductions in light penetration and enhanced self-shading effects and the beads settled at the bottom of the reactor

Muslim Student Association General Interest Meeting

https://larc.cardozo.yu.edu/flyers-2016-2017/1046/thumbnail.jp

The North Wyke Farm Platform: effect of temperate grassland farming systems on soil moisture contents, runoff and associated water quality dynamics

This is the final version of the article. Available from Wiley via the DOI in this record.The North Wyke Farm Platform was established as a United Kingdom national capability for collaborative research, training and knowledge exchange in agro-environmental sciences. Its remit is to research agricultural productivity and ecosystem responses to different management practices for beef and sheep production in lowland grasslands. A system based on permanent pasture was implemented on three 21-ha farmlets to obtain baseline data on hydrology, nutrient cycling and productivity for 2 years. Since then two farmlets have been modified by either (i) planned reseeding with grasses that have been bred for enhanced sugar content or deep-rooting traits or (ii) sowing grass and legume mixtures to reduce nitrogen fertilizer inputs. The quantities of nutrients that enter, cycle within and leave the farmlets were evaluated with data recorded from sensor technologies coupled with more traditional field study methods. We demonstrate the potential of the farm platform approach with a case study in which we investigate the effects of the weather, field topography and farm management activity on surface runoff and associated pollutant or nutrient loss from soil. We have the opportunity to do a full nutrient cycling analysis, taking account of nutrient transformations in soil, and flows to water and losses to air. The NWFP monitoring system is unique in both scale and scope for a managed land-based capability that brings together several technologies that allow the effect of temperate grassland farming systems on soil moisture levels, runoff and associated water quality dynamics to be studied in detail. HIGHLIGHTS: Can meat production systems be developed that are productive yet minimize losses to the environment?The data are from an intensively instrumented capability, which is globally unique and topical.We use sensing technologies and surveys to show the effect of pasture renewal on nutrient losses.Platforms provide evidence of the effect of meteorology, topography and farm activity on nutrient loss.The North Wyke Farm Platform is a UK National Capability supported by the Biotechnology and Biological Sciences Research Council (BBSRC BB/J004308/1)

Prospect of Indigenous Plant Extracts in Tea Pest Management

Tea is a popular beverage made from the leaves of evergreen shrub or tree Camellia sinensis, under the family Theaceae. Tea plant is subjected to the attack of insects, mites, nematodes and some plant pathogenic diseases. Tea production is greatly hindered due to these maladies. About 10-15% crop loss occurred by these pests per annum. In severe cases, it would be 100%. To combat these problems different groups of pesticides have been used in the tea fields since 1960. As tea is a consumable commodity, the effect of residue of pesticides in made tea is harmful to human health. In this context, biopesticides are being considered as environmentally safe, selective, biodegradable, economical and renewable alternatives for use in IPM programmes. Biopesticides are natural plant products and may be grown by the planters with minimum cost and extracted by indigenous methods. Biopesticides are secondary metabolites, which include alkaloids, terpenoids, phenolics, and minor secondary chemicals. It is estimated that as many as 2121 plant species have been reported to posses pest control properties. Botanicals like neem, ghora-neem, mahogoni, karanja, adathoda, sweet flag, tobacco, derris, annona, smart weed, bar weed, datura, calotropis, bidens, lantana, chrysanthemum, artemisia, marigold, clerodendrum, wild sunflower and many others may be grown by planters with minimum expense and extracted by indigenous methods. These botanical materials can be used as an alternative to chemical pesticides. These botanical extracts will help in controlling major pests of tea such as Helopeltis, red spider mite, aphids, thrips, jassid, flushworm, termites, nematodes etc. The present note reviews the information of most widely available indigenous plants that may be used for the control of insect pests of tea as a component of IPM. DOI: http://dx.doi.org/10.3329/ijarit.v1i1-2.13924 Int. J. Agril. Res. Innov. &amp; Tech. 1 (1&amp;2): 16-23, December, 201

Muslim Communities: Borders, Immigrants, and the War on Terror in the Age of Trump

https://larc.cardozo.yu.edu/flyers-2016-2017/1014/thumbnail.jp

Physico-Chemical Quality Of Drinking Water At Mushait, Aseer, South-Western Saudi Arabia

The physico-chemical quality study of different drinking water sources used in Khamis Mushait, southwestern, Saudi Arabia (SA) has been studied to evaluate their suitability for potable purposes. A total of 62 drinking water samples were collected randomly from bottled, desalinated and groundwater located around the study area. The parameters determined in this study were Turbidity; Conductivity; Total solids; pH; Chlorides; Hardness; Sulphate; Ammonia; Nitrite; Nitrate; Iron; Manganese; Copper and Zinc. Most examined parameters were higher in groundwater, followed by desalinated water except for Manganese and Zinc levels. Manganese level was highest in desalinated, followed by bottled water, while Zinc was higher in groundwater than bottled and desalinated water. Most examined groundwater samples had the highest physico-chemical levels as compared with guideline of international and Saudi standards, followed by desalinated and lastly bottled water. Desalinated water showed the higher Manganese value more than the recommended level followed by bottled water, while all the examined water samples had Zinc content lower than the guideline values of international and Saudi standards. Strict hygienic measures should be applied to improve quality of drinking water and to avoid deleterious effect on human health. This could be achieved by working towards a proper monitoring program of drinking water supply and sources Keywords: physico-chemical quality, Drinking Water Quality, Khamis Mushait, Saudi Arabia African Journal of Clinical and Experimental Microbiology Vol. 10 (2) 2009: pp. 117-12