A semi-analytical model of the Galilean satellites' dynamics

The Galilean satellites' dynamics has been studied extensively during the last century. In the past it was common to use analytical expansions in order to get simple models to integrate, but with the new generation computers it became prevalent the numerical integration of very sophisticated and almost complete equations of motion. In this article we aim to describe the resonant and secular motion of the Galilean satellites through a Hamiltonian, depending on the slow angles only, obtained with an analytical expansion of the perturbing functions and an averaging operation. In order to have a model as near as possible to the actual dynamics, we added perturbations and we considered terms that in similar studies of the past were neglected, such as the terms involving the inclinations and the Sun's perturbation. Moreover, we added the tidal dissipation into the equations, in order to investigate how well the model captures the evolution of the system.Comment: In the new version of the paper I introduced the following main changes: 1. qualitative (new plots) and quantitative (new tables) comparison of the model with the JPL ephemerides JUP310 2. comparison with the results of Musotto et al. 2002 3. extension and small corrections of Section 7, about tidal dissipatio

Test beam results of ATLAS Pixel Sensors

Silicon pixel detectors produced according to the ATLAS Pixel Detector design were tested in a beam at CERN in the framework of the ATLAS collaboration. The detectors used n+/n sensors with oxygenated silicon substrates. The experimental behaviour of the detectors after irradiation to 1.1 10**15 n_eq/cm**2 and 600 kGy is discussed. At the sensor bias voltage of 600 V the depleted depth is measured to be 229 um, the mean collected charge is 20000 electrons, the detection efficiency is 98.2% and the spatial resolution is 9.6 umComment: 8 pages, 6 figures, Pixel2002 conferenc

Investment analysis of plum brandy production – methodology approach

The major prerequisite of successful entrepreneurship venture is quality of decision-making process. Decision in investment is the most important financial decision. It is a part of both long-term business planning process and strategic business definition. Using available investment appraisal methods, entrepreneur should make positive or negative investment decision. Within the development of the economic theory and the practice many of methods made decision-making process rational and gave the scientific and practical base for successful project evaluation.Agricultural and Food Policy, Food Security and Poverty, Productivity Analysis,

The long-term evolution of known resonant trans-Neptunian objects

Aims. Numerous trans-Neptunian objects are known to be in mean-motion resonance with Neptune. We aim to describe their long-term orbital evolution (both past and future) by means of a one-degree-of-freedom secular model. In this paper, we focus only on objects with a semi-major axis larger than 50 astronomical units (au). Methods. For each resonant object considered, a 500 000-year numerical integration is performed. The output is digitally filtered to get the parameters of the resonant secular model. Their long-term (Giga-year) orbital evolution is then represented by the level curves of the secular Hamiltonian. Results. For the majority of objects considered, the mean-motion resonance has little impact on the long-term trajectories (the secular dynamics is similar to a non-resonant one). However, a subset of objects is strongly affected by the resonance, producing moderately-high-amplitude oscillations of the perihelion distance and/or libration of the argument of perihelion around a fixed centre. Moreover, the high perihelion distance of the object 2015 FJ345 is plainly explained by long-term resonant dynamics, allowing us to also deduce its orbital elements at the time of capture in resonance (at least 15 million years ago). The same type of past evolution is expected for 2014 FZ71.Comment: 9 pages, 7 figures, 1 tabl

Sample preparation and EFTEM of meat samples for nanoparticle analysis in food

Nanoparticles are used in industry for personal care products and the preparation of food. In the latter application, their functions include the prevention of microbes' growth, increase of the foods nutritional value and sensory quality. EU regulations require a risk assessment of the nanoparticles used in foods and food contact materials before the products can reach the market. However, availability of validated analytical methodologies for detection and characterisation of the nanoparticles in food hampers appropriate risk assessment. As part of a research on the evaluation of the methods for screening and quantification of Ag nanoparticles in meat we have tested a new TEM sample preparation alternative to resin embedding and cryo-sectioning. Energy filtered TEM analysis was applied to evaluate thickness and the uniformity of thin meat layers acquired at increasing input of the sample demonstrating that the protocols used ensured good stability under the electron beam, reliable sample concentration and reproducibility

Examining the Content of Mental Health Intake Assessments From a Biopsychosocial Perspective

Psychotherapists’ approach to intake assessment has a major impact on mental health case conceptualization and treatment. Despite the importance of this issue, very little is known about the actual intake assessment practices of therapists providing mental health care in the community. This appears to be the first study that has investigated which aspects of biological, psychological, and sociocultural functioning are documented by therapists in their client intake assessments, how thoroughly these issues are assessed, and how well the information collected is then integrated into the assessment findings and case conceptualization. The examination of 163 client files from 3 mental health clinics found that therapists were regularly collecting client information regarding a wide range of biopsychosocial issues, though not in a detailed or comprehensive manner. There was also little evidence that the information was being integrated in a manner designed to maximize treatment effectiveness. These findings have major implications for training and practice in mental health assessment

On the positive effects of taxation on education

In the economic literature a constant tax rate on labor income has usually a neutral or negative effect on education. The effect is neutral in the absence of non-deductible costs and it is negative in the presence of them. A positive effect is obtained in the presence of non-deductible profits or uncertainty in the returns to education. In this model education is treated as a signalling device for the level of human capital and agents choose freely their labor supply under certainty and perfect financial markets. Within this framework a constant tax rate on labor income has a positive effect on education under certainty and in the absence of non-deductible costs or profits as long as consumption and leisure are complementary and the amount of transfers and family income is low enough.Education, taxes

Wage Bargaining in a Multiple Application Search Model with Recall

In this paper I extend the multiple application urn-ball game structure, introduced by Gautier and Moraga-Gonzalez (2004) and Albrecht, Gautier, and Vroman (2006), to an scenario where firms can, after a rejection, make additional wage offers. This expands the game structure from a one-shot set up to a sequential game. A firm, after being rejected by an applicant, can choose another applicant to make him a new wage o¤er. This possibility gives firms an outside option after a rejection. This increases the bargaining power of firms, implying a change in their wage offer behavior. The resulting wage distribution is hump-shaped with the density of wage offers concentrated on central values, rather than in extreme values.Matching, Labor Market, Multiple application, Wage distribution