Lucha obrera, conflicto sindical y organización armada : El caso de la Juventud Trabajadora Peronista de Propulsora Siderúrgica [1973-1976]

El presente trabajo aborda el caso de la Juventud Trabajadora Peronista en la empresa Propulsora Siderúrgica de la localidad de Ensenada en el período 1973-1976, constituyendo éste un período clave en la historia política argentina en tanto significó el retorno del peronismo al poder luego de dieciocho años de proscripción legal. Enmarcada en la extensa constelación de experiencias de la ?nueva izquierda? que irrumpe con fuerza en Argentina a partir de fines de los años sesenta, y específicamente en la amplia experiencia de las fuerzas peronistas revolucionarias dentro de ella, la Juventud Trabajadora Peronista aparece como un espacio político-sindical especialmente rico para el estudio y análisis en el campo de la historia reciente argentina y dentro de ella de las prácticas sindicales radicalizadas. Fundada en 1973, la JTP nace como frente de masas sindical de la organización armada Montoneros. Fundada en el contexto histórico, político y social de retorno de Perón al país y de crisis del gobierno peronista, ésta seráparte de la emergencia de particulares formas de vínculo social en el que se entrecruzan elementos ligados a la práctica de los militantes obreros, sus agrupaciones sindicales, el proceso de radicalización general del período y la singular participación de las organizaciones armadas peronistas. Contemplado el entrecruzamiento entre organizaciones armadas revolucionarias, organizaciones sindicales combativas y la radicalización de sectores de la clase trabajadora, nuestro trabajo enfatiza la capacidad política obrera para imponer condiciones al capital, al gobierno y a sectores burocráticos del sindicalismo. Es en estos tres frentes de combate en los que se verán inmersos los sectores radicalizados de la clase obrera argentina que buscamos poner en un primer plano a lo largo de esta investigación

Lucha obrera, conflicto sindical y organización armada : El caso de la Juventud Trabajadora Peronista de Propulsora Siderúrgica [1973-1976]

El presente trabajo aborda el caso de la Juventud Trabajadora Peronista en la empresa Propulsora Siderúrgica de la localidad de Ensenada en el período 1973-1976, constituyendo éste un período clave en la historia política argentina en tanto significó el retorno del peronismo al poder luego de dieciocho años de proscripción legal. Enmarcada en la extensa constelación de experiencias de la ?nueva izquierda? que irrumpe con fuerza en Argentina a partir de fines de los años sesenta, y específicamente en la amplia experiencia de las fuerzas peronistas revolucionarias dentro de ella, la Juventud Trabajadora Peronista aparece como un espacio político-sindical especialmente rico para el estudio y análisis en el campo de la historia reciente argentina y dentro de ella de las prácticas sindicales radicalizadas. Fundada en 1973, la JTP nace como frente de masas sindical de la organización armada Montoneros. Fundada en el contexto histórico, político y social de retorno de Perón al país y de crisis del gobierno peronista, ésta seráparte de la emergencia de particulares formas de vínculo social en el que se entrecruzan elementos ligados a la práctica de los militantes obreros, sus agrupaciones sindicales, el proceso de radicalización general del período y la singular participación de las organizaciones armadas peronistas. Contemplado el entrecruzamiento entre organizaciones armadas revolucionarias, organizaciones sindicales combativas y la radicalización de sectores de la clase trabajadora, nuestro trabajo enfatiza la capacidad política obrera para imponer condiciones al capital, al gobierno y a sectores burocráticos del sindicalismo. Es en estos tres frentes de combate en los que se verán inmersos los sectores radicalizados de la clase obrera argentina que buscamos poner en un primer plano a lo largo de esta investigación

Lucha obrera, conflicto sindical y organización armada : El caso de la Juventud Trabajadora Peronista de Propulsora Siderúrgica [1973-1976]

El presente trabajo aborda el caso de la Juventud Trabajadora Peronista en la empresa Propulsora Siderúrgica de la localidad de Ensenada en el período 1973-1976, constituyendo éste un período clave en la historia política argentina en tanto significó el retorno del peronismo al poder luego de dieciocho años de proscripción legal. Enmarcada en la extensa constelación de experiencias de la ?nueva izquierda? que irrumpe con fuerza en Argentina a partir de fines de los años sesenta, y específicamente en la amplia experiencia de las fuerzas peronistas revolucionarias dentro de ella, la Juventud Trabajadora Peronista aparece como un espacio político-sindical especialmente rico para el estudio y análisis en el campo de la historia reciente argentina y dentro de ella de las prácticas sindicales radicalizadas. Fundada en 1973, la JTP nace como frente de masas sindical de la organización armada Montoneros. Fundada en el contexto histórico, político y social de retorno de Perón al país y de crisis del gobierno peronista, ésta seráparte de la emergencia de particulares formas de vínculo social en el que se entrecruzan elementos ligados a la práctica de los militantes obreros, sus agrupaciones sindicales, el proceso de radicalización general del período y la singular participación de las organizaciones armadas peronistas. Contemplado el entrecruzamiento entre organizaciones armadas revolucionarias, organizaciones sindicales combativas y la radicalización de sectores de la clase trabajadora, nuestro trabajo enfatiza la capacidad política obrera para imponer condiciones al capital, al gobierno y a sectores burocráticos del sindicalismo. Es en estos tres frentes de combate en los que se verán inmersos los sectores radicalizados de la clase obrera argentina que buscamos poner en un primer plano a lo largo de esta investigación

Nucleon magnetic moments in light-front models with quark mass asymmetries

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Paint spray mass spectrometry for the detection of additives from polymers on conducting surfaces

Paint Spray is developed as a direct sampling ionisation method for mass spectrometric analysis of additives in polymer-based surface coatings. The technique simply involves applying an external high voltage (5 kV) to the wetted sample placed in front of the mass spectrometer inlet and represents a much simpler ionisation technique compared to those currently available. The capabilities of Paint Spray are demonstrated herein with the detection of four commercially available hindered amine light stabilisers; TINUVIN® 770, TINUVIN® 292, TINUVIN® 123 and TINUVIN® 152 directly from thermoset polyester-based coil coatings. Paint Spray requires no sample preparation or pre-treatment and combined with its simplicity - requiring no specialised equipment - makes it ideal for use by non-specialists. The application of Paint Spray for industrial use has significant potential as sample collection from a coil coating production line and Paint Spray ionisation could enable fast quality control screening at high sensitivity.

Death on the front page : “Awesome things” and this thing called humanity

It has been called “the world’s worst recorded natural disaster,” and “the largest earthquake in 40 years,” galvanizing the largest global relief effort in history. For those of us involved in the discipline and/or the practice of communications, we realized that it presented a unique case study from a number of perspectives. Both the media and the public became so enraptured and enmeshed in the story of the tsunami of December 26, 2004, bringing to the fore a piece of geography and a peoples too rarely considered prior to the tragedy, that we felt compelled to examine the phenomenon. The overwhelming significance of this volume comes from its being a combination of both academic scholars and development practitioners in the field. Its poignancy becomes underscored from their wide-ranging perspectives, with 21 chapters representing some 14 different countries. Their realities provide not only credibility but also an unprecedented sensitivity to communication issues. Our approach here considers Tsunami 2004 from five communication perspectives: 1.) Interpersonal/ intercultural, 2.) Mass media, 3.) Telecommunications, 4.) Ethics, philanthropy, and development communication, and; 5.) Personal testimonies and observations. You will learn even more here about the theory and practice of disaster/crisis communication.

Influence of viscoelastic nature on the intermittent peel-front dynamics of adhesive tape

We investigate the influence of viscoelastic nature of the adhesive on the intermittent peel front dynamics by extending a recently introduced model for peeling of an adhesive tape. As time and rate-dependent deformation of the adhesives are measured in stationary conditions, a crucial step in incorporating the viscoelastic effects applicable to unstable intermittent peel dynamics is the introduction of a dynamization scheme that eliminates the explicit time dependence in terms of dynamical variables. We find contrasting influences of viscoelastic contribution in different regions of tape mass, roller inertia, and pull velocity. As the model acoustic energy dissipated depends on the nature of the peel front and its dynamical evolution, the combined effect of the roller inertia and pull velocity makes the acoustic energy noisier for small tape mass and low-pull velocity while it is burstlike for low-tape mass, intermediate values of the roller inertia and high-pull velocity. The changes are quantified by calculating the largest Lyapunov exponent and analyzing the statistical distributions of the amplitudes and durations of the model acoustic energy signals. Both single and two stage power-law distributions are observed. Scaling relations between the exponents are derived which show that the exponents corresponding to large values of event sizes and durations are completely determined by those for small values. Th scaling relations are found to be satisfied in all cases studied. Interestingly, we find only five types of model acoustic emission signals among multitude of possibilities of the peel front configurations.

Development of atmospheric pressure ionization ion mobility spectrometry and ion mobility spectrometry mass spectrometry

This study is focused on the development and evaluation of ion mobility instrumentation with various atmospheric pressure ionization techniques and includes the following work. First, a high-resolution drift tube ion mobility spectrometer (IMS), coupled with a commercial triple quadrupole mass spectrometer (MS), was developed. This drift tube IMS is compatible with the front-end of commercial Sciex mass spectrometers (e.g., Sciex API-300, 365, and 3000) and also allows easy (only minor modifications are needed) installation between the original atmospheric pressure ion source and the triple quadrupole mass spectrometer. Performance haracteristics (e.g.,resolving power, detection limit, transmission efficiency of ions) of this IMS-MS instrument were evaluated. Development of the IMS-MS instrument also led to a study where a proposal was made that tetraalkylammonium ions can be used as chemical standards for ESI-IMS. Second, the same drift tube design was also used to build a standalone ion mobility spectrometer equipped with a Faraday plate detector. For this highresolution (resolving power about 100 shown) IMS device, a multi-ion source platform was built, which allows the use of a range of atmospheric pressure ionization methods, such as: corona discharge chemical ionization (CD-APCI), atmospheric pressure photoionization (APPI), and radioactive atmospheric pressure chemical ionization (R-APCI). The multi-ion source platform provides easy switching between ionization methods and both positive and negative ionization modes can be used. Third, a simple desorpion/ionization on silicon (DIOS) ion source set-up for use with the developed IMS and IMS-MS instruments was built and its operation demonstrated. Fourth, a prototype of a commercial aspiration-type ion mobility spectrometer was mounted in front of a commercial triple quadrupole mass spectrometer. The set-up, which is simple, easy to install, and requires no major modifications to the MS, provides the possibility of gathering fundamental information about aspiration mobility spectrometry.

Experiments and analysis of propagation front under gasification regimes in a packed bed

The paper analyses the results of experiments on the propagation rate in a fuel bed under gasification conditions in a co-current reactor configuration. Experiments using wood chips with different values of moisture content have been conducted under gasification conditions. The influence of air mass flux on the propagation rate, peak temperature and gas quality is investigated. It is observed from the experiments that the flame front propagation rate initially increases as the air mass flux increased, reaching a peak propagation rate, and further increase in the air mass flux results in a decrease in the propagation rate. However, the bed movement increases with the increase in air mass flux. The experimental results provide an understanding on influence of the fuel properties on propagation front. The surface area per unit volume of the particles in the packed bed plays an important role in the propagation rate. It has been argued that the flaming pyrolysis contributes towards the flame propagation as opposed to the overall combustion process in a packed bed. The calorific value of the producer gas generated is nearly the same over the entire range of air mass flux for bone-dry and 10% moist wood. (C) 2014 Elsevier B.V. All rights reserved.

Agglomeration front dynamics: Drying in sessile nano-particle laden droplets

The drying of sessile, nano-silica laden water droplet is studied under ambient conditions, in the absence of any convection. The drying process can be divided into two distinct regimes. During regime 1, the outer edge of the droplet remains pinned and particles agglomerate at the droplet periphery similar to the traditional coffee ring. However in regime 2, with further evaporation, both the liquid contact line and the agglomeration front starts moving radially inwards from the initial contact edge. The contact between the liquid and the agglomerate is maintained throughout regime 2 and the vaporisation driven liquid edge recession essentially drives the inward growth of the particle deposition. Fast kinetics of particle aggregation results in rapid growth of this agglomeration front as seen from the experiments. A theoretical formulation involving a simplistic model of the agglomeration front growth based on particle mass balance has been proposed. (C) 2014 Elsevier Ltd. All rights reserved,

STUDY ON THE FORMATIONAL MECHANISM OF THE NORTHERN YELLOW (HUANGHAI) SEA COLD WATER MASS .2. DISCUSSION ON THE SOLUTION OF THE MODEL

The theoretical solution of the model of the Northern Yellow (Huanghai) Sea Cold Water Mass (NYSCWM) reveals that the NYSCWM is mainly formed through the continuous temperature increase of the overwintered water body above the Northern Yellow Sea Depression (NYSD) after spring when heat is continuously conducted from the sea surface to the deeper layer. In the NYSCWM's growing period, (June-July), nonlinear vertical convection and advection effects continuously increase, and are gradually balanced by the heat diffusion effect as the temperature increases from the surface to the bottom, which leads to the formation of an intensive thermocline and lateral front. Meanwhile, the three-dimensional circulation correspondingly occurs. In the NYSCWM's entire growing period, the horizontal circulation is always in the cyclonic motion, while the vertical circulation passes through a transition from a period with the cold centre as downwelling to a period with the cold centre as upwelling.

Numerical simulation of the mass loss process in pyrolizing char materials

We present here a decoupling technique to tackle the entanglement of the nonlinear boundary condition and the movement of the char/virgin front for a thermal pyrolysis model for charring materials. Standard numerical techniques to solve moving front problems — often referred to as Stefan problems — encounter difficulties when dealing with nonlinear boundaries. While special integral methods have been developed to solve this problem, they suffer from several limitations which the technique described here overcomes. The newly developed technique is compared with the exact analytical solutions for some simple ideal situations which demonstrate that the numerical method is capable of producing accurate numerical solutions. The pyrolysis model is also used to simulate the mass loss process from a white pine sample exposed to a constant radiative flux in a nitrogen atmosphere. Comparison with experimental results demonstrates that the predictions of mass loss rates and temperature profile within the solid material are in good agreement with the experiment.

Double-detonation sub-Chandrasekhar supernovae: Synthetic observables for minimum helium shell mass models

In the double-detonation scenario for Type Ia supernovae, it is suggested that a detonation initiates in a shell of helium-rich material accreted from a companion star by a sub-Chandrasekhar-mass white dwarf. This shell detonation drives a shock front into the carbon-oxygen white dwarf that triggers a secondary detonation in the core. The core detonation results in a complete disruption of the white dwarf. Earlier studies concluded that this scenario has difficulties in accounting for the observed properties of Type Ia supernovae since the explosion ejecta are surrounded by the products of explosive helium burning in the shell. Recently, however, it was proposed that detonations might be possible for much less massive helium shells than previously assumed (Bildsten et al.). Moreover, it was shown that even detonations of these minimum helium shell masses robustly trigger detonations of the carbon-oxygen core (Fink et al.). Therefore, it is possible that the impact of the helium layer on observables is less than previously thought. Here, we present time-dependent multi-wavelength radiative transfer calculations for models with minimum helium shell mass and derive synthetic observables for both the optical and ? -ray spectral regions. These differ strongly from those found in earlier simulations of sub-Chandrasekhar-mass explosions in which more massive helium shells were considered. Our models predict light curves that cover both the range of brightnesses and the rise and decline times of observed Type Ia supernovae. However, their colors and spectra do not match the observations. In particular, their B - V colors are generally too red. We show that this discrepancy is mainly due to the composition of the burning products of the helium shell of the Fink et al. models which contain significant amounts of titanium and chromium. Using a toy model, we also show that the burning products of the helium shell depend crucially on its initial composition. This leads us to conclude that good agreement between sub-Chandrasekhar-mass explosions and observed Type Ia supernovae may still be feasible but further study of the shell properties is required.