Can I follow you? Social media surveillance and policing dilemmas

This research paper explores current open source practices within the Metropolitan Police Service (MPS), with specific attention to social media use by frontline personnel for the purpose of intelligence gathering, investigation and safeguarding. Although, still a relatively new phenomenon for policing, recent advancements have been made in understanding the impact of open source and social media data use in police work, but the focus has been limited to overarching thematical analysis of systems that suggest institutional coordination in their use, function and purpose. This study takes a different approach by focusing on the practices employed by frontline policing personnel in the Metropolitan Police Service and evaluates the concept of ‘localised surveillance’ practices employed by frontline officers that risk undermining police legitimacy at a fundamental level. By identifying localised practices that include the use of personal devices, personal social media accounts and false personas to covertly extract open source and social media data this research considers the shifting power relationship between the police and public in an age where a plethora of personal information is readily available on the internet. At time when traditional surveillance practices are the focus of public enquiry, this timely and relevant research is essential for police services’ nationally and beyond to consider the implications of localised surveillance practices by frontline personnel on their respective agencies and society more widely

Magnetic fields experiment

The Explorer 45 magnetic fields instruments were designed, constructed, and tested; research in the program is summarized

Toward a Neutrino Mass Matrix

One may identify the general properties of the neutrino mass matrix by generating many random mass matrices and testing them against the results of the neutrino experiments.Comment: 3 pages, 1 figure, talk at DPF200

Screening of redox couples and electrode materials

Electrochemical parameters of selected redox couples that might be potentially promising for application in bulk energy storage systems were investigated. This was carried out in two phases: a broad investigation of the basic characteristics and behavior of various redox couples, followed by a more limited investigation of their electrochemical performance in a redox flow reactor configuration. In the first phase of the program, eight redox couples were evaluated under a variety of conditions in terms of their exchange current densities as measured by the rotating disk electrode procedure. The second phase of the program involved the testing of four couples in a redox reactor under flow conditions with a varity of electrode materials and structures

Distortion of the Magnetosphere During a Magnetic Storm on 30 September, 1961

Magnetosphere distortion during magnetic storm observed by Explorer XII satellit

Investigation of Metal and Organic Contaminant Distributions and Sedimentation Rates in Backwater Lakes along the Illinois River

Systematic sub-sampling of sediment cores in sections of uniform thickness is necessary in order to evaluate historic changes in sediment quality, to determine the vertical extent of contamination, and to measure sedimentation rates. With these objectives in mind, fourteen sediment cores were collected during March 2002 using the Illinois State Water Survey vibracorer. Concentrations of metals and total organic carbon were measured using standard techniques. Concentrations of chlorinated pesticides, phenolic compounds, polycyclic aromatic hydrocarbons (PAHs), and polychlorinated biphenyls (PCBs) were measured by gas chromatography/mass spectrometry (GC-MS). The concentrations of chlorinated pesticides, phenolic compounds and polychlorinated biphenyls (PCBs) were below the method detection limit in all sediment samples analyzed. However, there was a wide range in concentrations of polycyclic aromatic hydrocarbons (PAHs) which were detected in all sediment samples. Also, a wide range of metal concentrations was noted in the sediments evaluated. Lower concentrations of metals were found in the upper 0.5 m of sediment but concentrations were elevated at depths ranging from 1.0 m to 1.5 m. Sedimentation rates were estimated using cesium-137 radiometric dating on 14 vibracores. Sedimentation rates range from < 0.1 to 1.9 cm/yr, with an average of 0.9 cm/yr. These rates are comparable to those reported in previous studies.Illinois Sustainable Technology Centerpublished or submitted for publicationis peer reviewe

The interplanetary magnetic field and polar magnetic disturbances

Interplanetary magnetic field and magnetic disturbances in polar regio

Preliminary results of measurements of sq currents and the equatorial electrojet near peru

Measurement of electric current, magnetic field, and electron density in ionosphere using Nike-Apache sounding rocket

Lessons and Prospects from the pMSSM after LHC Run I: Neutralino LSP

We study SUSY signatures at the 7, 8 and 14 TeV LHC employing the 19-parameter, R-Parity conserving p(henomenological)MSSM, in the scenario with a neutralino LSP. Our results were obtained via a fast Monte Carlo simulation of the ATLAS SUSY analysis suite. The flexibility of this framework allows us to study a wide variety of SUSY phenomena simultaneously and to probe for weak spots in existing SUSY search analyses. We determine the ranges of the sparticle masses that are either disfavored or allowed after the searches with the 7 and 8 TeV data sets are combined. We find that natural SUSY models with light squarks and gluinos remain viable. We extrapolate to 14 TeV with both 300 fb$^{-1}$ and 3 ab$^{-1}$ of integrated luminosity and determine the expected sensitivity of the jets + MET and stop searches to the pMSSM parameter space. We find that the high-luminosity LHC will be powerful in probing SUSY with neutralino LSPs and can provide a more definitive statement on the existence of natural Supersymmetry.Comment: 41 pages, 27 figures. arXiv admin note: substantial text overlap with arXiv:1307.844

Molecular, Genetic, and Biochemical Analysis of Phage Lambda Lysis

Spanins are required for outer membrane disruption, the final step in phage lysis of Gram-negative hosts. Recently spanins were shown to be fusogenic and it was proposed that spanins function by fusing the inner and outer membrane. This work uses a genetic approach to probe the functional domains of the λ spanins Rz and Rz1 by selecting for lysis-defective alleles. Our selection showed single missense mutations clustered within subdomains essential to other membrane fusion systems, including coiled-coil domains and a proline-rich region. Surprisingly, most products of lysis defective alleles were normal for accumulation and complex formation. This suggests that a majority of the mutations blocked function at a downstream step, e.g. membrane fusion. To gain insight into spanin function, we selected for spontaneous suppressors that restored plaque formation to lysis defective alleles. Strikingly, regardless of the site of inactivating mutation, the second site rescuing mutations clustered within a coiledcoil domain near the cytoplasmic membrane. These changes encoded polar insertions into the hydrophobic core and were not allele specific. Furthermore, suppressor mutants were defective for Rz accumulation and exhibited a defect in lysis morphology. Instead of identifying point-to-point contacts, a global suppression pattern was indicated. This suggests that destabilization of the membrane-proximal segment of the Rz coiled-coil can rescue function for lysis defective alleles of Rz or Rz1 at cost of normal saltatory function. Lastly, it is not known how λ causes lysis from the poles of E. coli. To address this, we use time-lapse microscopy to monitor the activity and subcellular localization of lysis proteins in the seconds prior to lysis. Results exclude the endolysin and spanin and indicate that the holin, which initiates lysis, also controls the site of lysis