External fuel vaporization study, phase 2

An analytical study was conducted to evaluate the effect of variations in fuel properties on the design of an external fuel vaporizaton system. The fuel properties that were considered included thermal stability, critical temperature, enthalpy a critical conditions, volatility, and viscosity. The design parameters that were evaluated included vaporizer weight and the impact on engine requirement such as maintenance, transient response, performance, and altitude relight. The baseline fuel properties were those of Jet A. The variation in thermal stability was taken as the thermal stability variation for Experimental Referee Broad Specification (ERBS) fuel. The results of the analysis indicate that a change in thermal stability equivalent to that of ERBS would increase the vaporization system weight by 20 percent, decrease oprating time between cleaning by 40 percent and make altitude relight more difficult. An increase in fuel critical temperature of 39 K would require a 40 percent increase in vaporization system weight. The assumed increase in enthalpy and volatility would also increase vaporizer weight by 40 percent and make altitude relight extremely difficult. The variation in fuel viscosity would have a negligible effect on the design parameters

Book review: fishers and plunderers: theft, slavery and violence at sea by Alastair Couper, Hance D. Smith and Bruno Ciceri

Kathleen Chiappetta welcomes Fishers and Plunderers: Theft, Slavery and Violence at Sea as a valuable introductory overview of the supply chain behind the 90 million tonnes of fish that are pursued and landed each year as part of the globalised fishing industry. Alastair Couper, Hance D. Smith and Bruno Ciceri draw upon their wealth of experience to address issues of over-fishing and sustainability as well as the often harrowing working conditions of fishers. Fishers and Plunderers: Theft, Slavery and Violence at Sea. Alastair Couper, Hance D. Smith and Bruno Ciceri. University of Chicago Press. 2015

Book review: water and development: good governance after neoliberalism edited by Ronaldo Munck, Narathius Asingwire, G. Honor Fagan and Consolata Kabonesa

In the edited collection Water and Development: Good Governance After Neoliberalism, editors Ronaldo Munck, Narathius Asingwire, G. Honor Fagan and Consolata Kabonesa approach water as an essential public necessity. The book examines global, national and local initiatives of water governance, focusing particularly on issues of gender, technology and climate change through studies of Sub-Saharan Africa. This volume is a well-structured introduction to the topic of water and development that shows the necessity of harnessing global initiatives through deep understanding of local contexts, writes Kathleen Chiappetta

Hadrophilic Z':a bridge from LEP1, SLC and CDF to LEP2 anomalies

In order to explain possible departures from the Standard Model predictions for $b\bar b$ and $c\bar c$ production at $Z$ peak, we propose the existence of a $Z'$ vector boson with enhanced couplings to quarks. We first show that this proposal is perfectly consistent with the full set of LEP1/SLC results. In particular, $Z-Z'$ mixing effects naturally explain the fact that $\Gamma_b$ and $\Gamma_c$ deviate from the SM in opposite directions. We then show that there is a predicted range for enhanced $Z'q\bar q$ couplings which explains, for a precise and interesting range of $Z'$ masses, the excess of dijet events seen at CDF. A $Z'$ with such couplings and mass would produce clean observable effects in $b\bar b$ and in total hadronic production at LEP2.Comment: 24 pages , 5 Postscript figures, Acknowledgement

Book Review: Water: Abundance, Scarcity and Security in the Age of Humanity by Jeremy J. Schmidt

In Water: Abundance, Scarcity and Security in the Age of Humanity, Jeremy J. Schmidt details the intellectual history of US water management philosophy, tracing the shift towards considering water a resource to be brought under the watch of the state as well as the transformation from a discourse of abundance to scarcity. In showing how water resources are far from a neutral category, this well researched and enlightening book is an important read for understanding how we perceive water today, writes Kathleen Chiappetta

Leptophobic U(1)'s and R_b, R_c at LEP

In the context of explaining the experimental deviations in R_b and R_c from their Standard Model predictions, a new type of U(1) interaction is proposed which couples only to quarks. Special attention will be paid to the supersymmetric \eta-model coming from E_6 which, due to kinetic mixing effects, may play the role of the leptophobic U(1). This talk summarizes work done with K.S. Babu and J. March-Russell in hep-ph/9603212.Comment: LaTeX, 4 pages, 1 embedded EPSF figure. Talk given at Fourth International Conference on Supersymmetry (SUSY-96), College Park, Maryland, May 29 - June 1, 199

Bidimensional Tandem Mass Spectrometry for Selective Identification of Nitration Sites in Proteins.

Nitration of protein tyrosine residues is very often regarded as a molecular signal of peroxynitrite formation during development, oxidative stress, and aging. However, protein nitration might also have biological functions comparable to protein phosphorylation, mainly in redox signaling and in signal transduction. The major challenge in the proteomic analysis of nitroproteins is the need to discriminate modified proteins, usually occurring at substoichiometric levels from the large amount of nonmodified proteins. Moreover, precise localization of the nitration site is often required to fully describe the biological process. Existing methodologies essentially rely on immunochemical techniques either using 2D-PAGE fractionation in combination with western blot analyses or exploiting immunoaffinity procedures to selectively capture nitrated proteins. Here we report a totally new approach involving dansyl chloride labeling of the nitration sites that rely on the enormous potential of MSn analysis. The tryptic digest from the entire protein mixture is directly analyzed by MS on a linear ion trap mass spectrometer. Discrimination between nitro- and unmodified peptide is based on two selectivity criteria obtained by combining a precursor ion scan and an MS3 analysis. This new procedure was successfully applied to the identification of 3-nitrotyrosine residues in complex protein mixtures

HERA prospects on Compositeness and New Vector Bosons

The absence of deviations from the Standard Model for the differential cross section ${d\sigma}/{dQ^2}$ at HERA is used to set limits on electron quark compositeness scale and on new vector bosons, especially the hadrophilic one recently introduced as a possible explanation for LEP/SLC and CDF anomalies.Comment: Latex file, 7 pages and 1 ps fig, few comments on others experiments are added, results are unchanged. To appear in Phys. Let.