761 research outputs found
A study on materials and painting techniques of 1930s Italian mural paintings: two cases by Mario Sironi and Edmondo Bacci in Venice
No full textABSTRACT
This study deals with two examples of the modern Italian Muralism, an artistic “movement” which took place in Italy at the beginning of the XX century and culminate in the 1930s during the fascist period. The case studies here presented were executed by Mario Sironi (1885-1961) and Edmondo Bacci (1913-1978) in Venice in representative public places, as they were given a community's role by the fascist propaganda especially addressed to young people. After the Second World War, the fascist symbols were eliminated and the murals partially sank into oblivion. This neglect and several unorthodox restoration treatments led the murals to the actual bad state of conservation. In recent years, they have been re-evaluated for their artistic value and, therefore, studied to know the materials used and the painting techniques in order to understand their conservation needs and plan sustainable conservation projects.
Although the artists declared to paint a fresco (this production technique was considered the most appropriate at that time since it was the expression of the Italian traditions), the analytical results showed that the artists used tempera techniques: Sironi used egg yolk, casein and gum Arabic with industrial zinc, titanium, chrome and iron-based pigments and applied them on a fresco background; Bacci used commercial oil colours on a dry cement mortar. Furthermore, the actual conservation problems are mainly related to the poor adhesion of both original and non-original painted layers: both the murals suffered for conservation treatments in which synthetic materials were used to consolidate the painting layers but also to repaint and remake several original areas
The challenges in establishing HEP in laboratory swine
No full textThe challenges in establishing HEP in laboratory swine
Barone F1, Ventrella D1, Elmi A1, Bacci ML1
1 Department of Veterinary Medical Sciences, Alma Mater Studiorum UNIBO
In 1998 from the International Conference on Humane Endpoints (HEP) in animal experiments for biomedical research emerged that HEPs are part of a dynamic process, influenced by scientific developments as well as by animal welfare concerns as they evolve with time. Nowadays there are several publications regarding criteria, definition and evaluation of HEPs, but mainly related to the most common laboratory animals such as mouse and rats (Aldred et al., 2002; Vlach et al., 2000). In the last years the role of swine as laboratory animal is increasing due to its translational value (Monticello and Haschek, 2016) and relatively lighter ethical implications when compared to the other large animal models. The need for a specific approach for each protocol, and the limited records available (Harvey-Clark et al., 2000; Malavasi et al., 2006), are probably two of the main reasons behind the lack of dedicated HEP guidelines for the laboratory swine. Despite the above-mentioned issues, the Directive 2010/63/EU requires specific HEPs for each submitted protocol, thus the need for more in-depth knowledge regarding pain assessment. A humane endpoint can be considered as a possible refinement alternative for those experiments that involve pain and discomfort to the animals leading to higher quality research without compromising welfare itself. The task of Veterinary Medicine is to find new biomarkers and behavioral patterns in order to provide researchers with accurate tools that allow for a better understanding of objective swine welfare in each experimental condition. Our aim, as veterinary physiologists, is to establish reliable guidelines for an early detection of para-physiological and pathological stress and pain patterns in the laboratory swine. In this abstract we will present our experience collected within the last 30 years regarding different experimental protocols with the swine as laboratory animal for xenotransplantation, endotoxic shock, gastrointestinal inflammation, inherited genetic disease, CNS and ocular disease.
Aldred, A.J., Cha, M.C., Meckling-Gill, K.A., 2002. Determination of a humane endpoint in the L1210 model of murine leukemia. Contemp. Top. Lab. Anim. Sci. Am. Assoc. Lab. Anim. Sci. 41, 24–27.
Harvey-Clark, C.J., Gilespie, K., Riggs, K.W., 2000. Transdermal fentanyl compared with parenteral buprenorphine in post-surgical pain in swine: a case study. Lab. Anim. 34, 386–398.
Malavasi, L.M., Nyman, G., Augustsson, H., Jacobson, M., Jensen-Waern, M., 2006. Effects of epidural morphine and transdermal fentanyl analgesia on physiology and behaviour after abdominal surgery in pigs. Lab. Anim. 40, 16–27. doi:10.1258/002367706775404453
Monticello, T.M., Haschek, W.M., 2016. Swine in Translational Research and Drug Development. Toxicol. Pathol. 44, 297–298. doi:10.1177/0192623316630838
Vlach, K.D., Boles, J.W., Stiles, B.G., 2000. Telemetric evaluation of body temperature and physical activity as predictors of mortality in a murine model of staphylococcal enterotoxic shock. Comp. Med. 50, 160–166
Implementation of a partially decentralized control architecture using wireless active sensors
No full textThis paper deals with the development of a vibration control architecture in which many stand-alone active dampers are involved. Each device is able to independently perform the control task, since it is embedded with sensors, an inertial actuator and a microcontroller, in which the control algorithm is implemented. The aim of this architecture is to improve the performance of a decentralized control strategy through a partial sharing of data between devices. The proposed control solution is based on the optimal control theory; the Linear Quadratic Regulator works with the full-state of the system, which is not available in many applications. In order to provide the entire state vector, state estimation is implemented in each device. A state recovery algorithm is adopted to improve the quality of the estimation without placing a hefty burden on the wireless channel. Numerical analysis is made in order to study the advantages of this method. Finally, the proposed solution is validated with experimental results from a clamped-clamped beam
Distributed wireless-based control strategy through Selective Negative Derivative Feedback algorithm
No full textIn this study the use of many stand-alone devices is considered for active vibration control. A stand-alone device represents a control unit which is able to independently perform the vibration control task, since it is embedded with sensors, an inertial actuator and a microcontroller, in which the control algorithm is implemented. The aim of this architecture is to improve the performance of a decentralized control strategy through a partial sharing of data between devices, without the use of cables. The proposed algorithm also aims to avoid instability phenomena related to the dynamics of inertial actuators. First, the formulation of the modified Negative Derivative Feedback resonant controller is derived; then, the steps of the control strategy are explained, which are based on a preliminary modal identification of the structure and an automatic assignment of a compensator for each resonance frequency to be controlled. Finally, the proposed method is validated with experimental results from a clamped-clamped beam
Hair Testosterone and Cortisol Concentrations in Pre- and Post-Rut Roe Deer Bucks: Correlations with Blood Levels and Testicular Morphometric Parameters
Get PDFThe roe deer is a seasonally breeding species with a reproductive cycle regulated by endogenous rhythms and photoperiod-sensitivity. Sexually mature bucks show hormonal and testicular activation during the reproductive season, with a peak in the rut period, and following gradual involution. Hair is a good matrix for non-invasive endocrinological analyses that provide long-term information without being influenced by the hormones’ pulsating release patterns in blood. The aim of the work was to quantify hair concentrations of testosterone and cortisol in wild roe deer bucks hunted during the pre- and post-rut period, using a radioimmunoassay methodology, and to look for differences between the two periods. The secondary objective was the evaluation of possible correlations of such hair concentrations with blood and morphometric parameters of the testes. Both hormones showed statistical differences, with opposing trends, when comparing the two periods: testosterone increased while cortisol decreased. The correlation analysis was in agreement with existing literature regarding metabolism/actions of these hormones and testicular morphometric parameters. This study represents the first report of the use of radioimmunoassay techniques to quantify testosterone and cortisol in roe deer hair, and may provide interesting insights into their reproductive physiology
El análisis de los discursos sociales. Entre el pecado de la referencialidad y la tentación del esoterismo
Get PDFFil: Oberti, Alejandra. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.Fil: Aguilar, Paula. Instituto de Investigaciones Gino Germani (FCS-UBA).Fil: Bacci, Claudia. Instituto de Investigaciones Gino Germani (FCS-UBA).Fil: Insausti, Joaquín. Instituto de Investigaciones Gino Germani (FCS-UBA).Fil: Fernández Cordero, Laura. Instituto de Investigaciones Gino Germani (FCS-UBA).Fil: Gasparin, María Florencia. Instituto de Investigaciones Gino Germani (FCS-UBA).Fil: Guembe, María Laura. Instituto de Investigaciones Gino Germani (FCS-UBA).Fil: Peller, Mariela. Instituto de Investigaciones Gino Germani (FCS-UBA).Fil: Vacarezza, Nayla. Instituto de Investigaciones Gino Germani (FCS-UBA)
Testimonios, género y afectos : América Latina desde los territorios y las memorias al presente
No full textTabla de contenidos: Un diálogo sobre testimonio, género y afectos / Claudia Bacci y Alejandra Oberti. Diálogos del género o cómo no caerse del mapa. Una vuelta / Nora Domínguez. Nombrar los cuerpos olvidados. Memorias de la violencia en la narrativa de Nona Fernández / Mariela Peller. Afectos, cuerpo y memoria. La experiencia del amor en Aparecida de Marta Dillon / Lucas Gerardo Saporosi. "Se rompe el territorio". Entender y repensar los marcos a partir de los cuales las mujeres mapuce protagonizan la resistencia al extractivismo / Graciela Alonso, Eva Noelia Lincán, Anabella Paz y Laura Fernández. Disputas en los sentidos de la memoria. Cuerpo, sexualidad y derechos en la militancia de izquierda de los setenta / Lilian Celiberti. Afectos justos: escenas del género y la justicia (Argentina, Perú, Guatemala) / Claudia Andrea Bacci. Otras violencias de género. Memorias de la prisión política de mujeres militantes de Valparaíso / María Angélica Cruz y Valeska Orellana. Memoria, cuerpo y emoción: testimonios de mujeres sobrevivientes del terrorismo de Estado / Bárbara Sutton. Partos: el recuerdo como acto de creación / Alejandra Oberti. La experiencia de abortar hecha relato. Código Rosa desde una genealogía feminista / Bárbara Corneli Colombatto y Paula Satta. Duelos reverberantes. Afectos y política en la protesta por las muertes por abortos clandestinos en América Latina / Nayla Luz Vacarezza. Poéticas testimoniales de lo visible: poner el cuerpo y la voz en la transmisión de la memoria / Ana Forcinito.
Assistenza psicologica per i proprietari di pet.
No full textPresentazione dell'iniziativa Progetto rivivere.pet al mondo dei liberi professionisti. Tale iniziativa si configura come un supporto gratuito psicologico di elaborazione del lutto da parte di proprietari di pet
A brief overview of transgenic farm animals.
No full textTransgenesis offers new possibilities to rapidly modify the genome of living organisms. The application of transgenesis to farm animals faces many problems, more than those observed in the transgenesis of laboratory animals, as there are currently many different techniques available to obtain transgenic animals, which all have problems regarding low efficiency and high costs. When these techniques are applied to farm animals the problems concerning transgenesis are multiplied. Two main techniques, male pronuclear microinjection and sperm mediated gene transfer, utilised in farm animal transgenesis, are briefly presented. The improvement of these techniques and the employment of other biotechnologies such as cloning, could expand the uses of transgenic farm animals for human healt
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