2D kinematics of the edge-on spiral galaxy ESO 379-G006

We present a kinematical study of the nearly edge-on galaxy ESO 379-G006 that shows the existence of extraplanar ionized gas. With Fabry-Perot spectroscopy at H-alpha, we study the kinematics of ESO 379-G006 using velocity maps and position-velocity diagrams parallel to the major and to the minor axis of the galaxy. We build the rotation curve of the disk and discuss the role of projection effects due to the fact of viewing this galaxy nearly edge-on. The twisting of the isovelocities in the radial velocity field of the disk of ESO 379-G006 as well as the kinematic asymmetries found in some position-velocity diagrams parallel to the minor axis of the galaxy suggest the existence of deviations to circular motions in the disk that can be modeled and explained with the inclusion of a radial inflow probably generated by a bar or by spiral arms. We succeeded in detecting extraplanar Diffuse Ionized Gas in this galaxy. At the same time, from the analysis of position-velocity diagrams, we found some evidence that the extraplanar gas could lag in rotation velocity with respect to the midplane rotation.Comment: 61 pages, 15 figures. Accepted for publication in A

Low-intensity resistance exercise training increases lower limb force in healthy retirees

INTRODUCTION: Aging is associated with decreasing muscle strength. Older people who have never done resistance work in a gym require gradual training programs to help them increasing confidence on this type of training. The use of low intensity resistance exercise with slow movements and tonic force improvement has been proposed as an effective method to increase muscular strength. There is little literature on the effect of intensity training on 30% of one repetition maximum (RM). PURPOSE: To establish the changes in the strength of upper and lower limb force after participating in a 10 week low-intensity resistance exercise for a group of healthy retirees aged between 50 and 70 years. METHODS: Quasi-experimental design, with two measurements. Fifty-eight participants were separated into two groups according to their available schedule. The experimental group received low-intensity resistance training for ten weeks, three times a week, with an intensity of 30 to 60% RM. The control group received no training. Physical tests applied to both groups were: handgrip strength with digital dynamometer, Short Physical Performance Battery (SPPB) and 8-Foot up and go test (FUGT).RESULTS: Forty nine participants completed the study (total dropout rate was 16%) from which 57% were women. Participants in the experimental group (n = 31) had improvements in SPPB and FUGT tests (p \u3c.05). Without changes in handgrip strength. On the other hand, any changes were observed in the control group. CONCLUSION: The results indicate that a low-intensity resistance training (30% 1RM) is a useful method to increase muscle strength of lower limbs in healthy older adults. Due to the interference effect of training, more time is required to observe changes in the dynamic strength of the upper limbs. This type of training program is useful for promoting functionality in older adults reluctant to resistance training

Information Technology and Competitive Advantage: The Role of the Ownership Structure

This paper analyses the relationship between information technology use (IT) and competitive advantage. Previous empirical research shows that IT improves competitive advantage when it acts together with some human or managerial resources of an intangible nature. In this work we propose a new complementary resource to IT: democratic ownership structure. We empirically analyse whether ownership structure and IT have a positive, combined impact on competitive advantage. Results show that ownership structure is a key element in explaining competitive advantage differences. Nonetheless, we did not find any IT-ownership structure complementary effect

A comprehensive analysis of the contributions to the nonlinear optical properties of thin Ag films

© 2010 American Institute of Physics. The electronic version of this article is the complete one and can be found at: http://dx.doi.org/10.1063/1.3429118DOI: 10.1063/1.3429118The nonlinear optical properties of 20 nm thick Ag films are investigated by time-resolved white- light continuum pump-probe experiments in both transmission and reflection mode. The dynamics of changes in permittivity Δε are measured at wavelengths between 500 to 700 nm. The data is fitted to a modified Drude model in the frequency domain and to a two-temperature model in the time domain. Changes in the individual Drude parameters are calculated as a function of time. A single, coherent model is proposed based on these fittings that describes the dynamics of the nonlinear optical properties of Ag, which could be used to model the nonlinear responses of multilayer structures containing thin films of Ag. The physical origins of the observed responses are discussed

Thermal and phase transformations analysis in a PREMOMET® steel

Thermal analysis in a PREMOMET® steel has been performed by differential scanning calorimetry (DSC) and highresolution dilatometry. The phase transformation temperatures (Ac1, Ac3, Ms and Mf) of this steel were obtained by the two methods at different heating rates showing good agreement between both techniques. The enthalpy of α-γ transformation for this steel was measured using the thermograms acquired by DSC and microstructure was analyzed by scanning electron microscope (SEM). The results showed that this steel retained a martensitic structure for all conditions

Thermal and phase transformations analysis in a PREMOMET® steel

Thermal analysis in a PREMOMET® steel has been performed by differential scanning calorimetry (DSC) and highresolution dilatometry. The phase transformation temperatures (Ac1, Ac3, Ms and Mf) of this steel were obtained by the two methods at different heating rates showing good agreement between both techniques. The enthalpy of α-γ transformation for this steel was measured using the thermograms acquired by DSC and microstructure was analyzed by scanning electron microscope (SEM). The results showed that this steel retained a martensitic structure for all conditions

Comparative efficacy between atorvastatin and rosuvastatin in the prevention of cardiovascular disease recurrence

Background: There is no randomized clinical trials with recurrence of atherosclerotic cardiovascular disease (ASCVD) as a major outcome with rosuvastatin. In order to analyze potential differences in the clinical response to atorvastatin and rosuvastatin in secondary ASCVD prevention, we have analyzed the clinical evolution of those subjects of the Dyslipemia Registry of the Spanish Society of Arteriosclerosis (SEA) who at the time of inclusion in the Registry had already suffered an ASCVD. Methods: This observational, retrospective, multicenter, national study was designed to determine potential differences between the use of atorvastatin and rosuvastatin in the ASCVD recurrence. Three different follow-up start-times were performed: time of inclusion in the registry; time of first event if this occurred after 2005, and time of first event without date restriction. Results: Baseline characteristics were similar between treatment groups. Among atorvastatin or rosuvastatin users, 89 recurrences of ASCVD were recorded (21.9%), of which 85.4% were coronary. At the inclusion of the subject in the registry, 345 participants had not suffered a recurrence yet. These 345 subjects accumulated 1050 person-years in a mean follow-up of 3 years. Event rates were 2.73 (95% CI: 1.63, 4.25) cases/100 person-years and 2.34 (95% CI: 1.17, 4.10) cases/100 person-years in the atorvastatin and rosuvastatin groups, respectively. There were no statistically significant differences between the two groups independently of the follow-up start-time. Conclusions: This study does not find differences between high doses of rosuvastatin and atorvastatin in the recurrence of ASCVD, and supports their use as clinically equivalent in secondary prevention of ASCVD

Analysis of a spatial Lotka-Volterra model with a finite range predator-prey interaction

We perform an analysis of a recent spatial version of the classical Lotka-Volterra model, where a finite scale controls individuals' interaction. We study the behavior of the predator-prey dynamics in physical spaces higher than one, showing how spatial patterns can emerge for some values of the interaction range and of the diffusion parameter.Comment: 7 pages, 7 figure