177,810 research outputs found
Introduzione [L’estetica di Hegel]
No full textIntroduzione a una raccolta di saggi sull'estetica di Hegel
La Tragedia
No full textIl mio contributo si articolerà in tre parti. Nella prima ricostruirò i momenti salienti dello sviluppo del pensiero hegeliano sulla tragedia e sul tragico fino alla Fenomenologia dello spirito compresa, così come il contesto sistematico in cui si situa la riflessione sulla tragedia. Nella seconda mi occuperò più diffusamente della teoria della tragedia greca classica (per Hegel, la tragedia per eccellenza) facendo riferimento soprattutto alle Lezioni di estetica. Questo testo sarà anche alla base, nella breve terza parte, dell’esposizione della teoria hegeliana del dramma moderno
Analysis of two-decade meteorological and air quality trends in Rome (Italy)
No full textThis study presents a trend analysis of a two-decade (2000–2020) series of surface meteorological and air quality data measured in Rome (Italy). Data series are collected at three sites in Rome downtown and its coastal surroundings. This paper fills the gap due to missing or incomplete recent information about the meteorological and atmospheric composition tendencies in the Rome area. Datasets are subjected to in-depth quality control and to statistical analysis to verify the data homogeneity, whilst trend analysis is performed using the Seasonal Kendall test. The results show a statistically significant positive trend for average air temperature (0.07 °C year−1 in urban and coastal sites), whilst maximum and minimum temperatures increase more in urban (0.10 °C year−1) than in coastal (0.01 °C year−1) environment. The water vapour mixing ratio trend is higher in the city (0.10 g kg−1 year−1) than along the coast (0.03 g kg−1 year−1). The heat index tendency is more pronounced in the Rome centre (0.11 °C year−1) than in the coast (0.06 °C year−1). The monthly cumulative precipitations do not show statistically significant trends. On the other hand, air quality generally improved: surface pollutant concentrations show a significant decrease thanks to the reduction of local emissions (C6H6, − 0.12 μg m−3 year−1; SO2, − 0.09 μg m−3 year−1; CO, − 0.02 mg m−3 year−1; NOx, − 1.28 μg m−3 year−1; NO, − 0.38 μg m−3 year−1; NO2, − 0.60 μg m−3 year−1, PM10, − 0.35 μg m−3 year−1). Only O3 shows a statistically significant positive trend (0.15 μg m−3 year−1), in agreement with wider scale studies. The outcomes suggest that whilst local and national policies contribute to the improvement of air quality, the rising of temperature—as likely consequence of climate change—may be an emerging cause of concern for human thermal discomfort and potential effect on the conservation of tangible immovable heritage
Early diagnosis and treatment in a child with foodborne botulism
No full textIntroduction Foodborne botulism is a neuroparalytic disease caused by ingestion of food contaminated with botulinum toxins. Despite rare the mortality rate is high if untreated. Diagnosis of botulism is still a challenge for clinician, due to the variability of clinical manifestations and disease course. We report on a child with type B botulin intoxication who was early diagnosed and treated underlining that clinical suspicion is crucial to start prompt treatment. Case presentation An 11-year-old boy presented with bilateral ptosis and mydriasis, dry mouth, difficulty in swallowing, dysphonia, urine retention and constipation. Clear sensorium and no fever were observed. Immediately the suspicion of botulism was risen and botulinum antitoxin was administered. 3 days later serum and rectal samples tested positive for Clostridium botulinum. The patient completely recovered when discharged from hospital. Discussion Foodborne botulism is still possible in developed countries. The confirmation test of botulism requires some days. To avoid long delays between intoxication and diagnosis prompt clinical suspicion is thus crucial. The outcome depends on rapid implementation of appropriate management with intensive respiratory care and antitoxin administration
[Hepatic echography, angiography and angiotomography: results of a combined study in hepatic tumors (author's transl)]
No full textSimulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Croce e Gramsci su dialettica e arte in Hegel
No full textQuesto contributo si propone di mostrare come il giudizio sulla dialettica hegeliana sia, tanto in Croce quanto in Gramsci, strutturalmente legato alle rispettive concezioni della natura e della posizione dell’arte. La critica crociana alla dialettica hegeliana è motivata, tra l’altro, proprio dalla necessità di evitare la tesi hegeliana della morte dell’arte: l’introduzione della categoria della “distinzione” fornisce la base teorica per preservare l’indipendenza storico-concettuale dell’arte rispetto alla filosofia. Gramsci, al contrario, lamenta la neutralizzazione crociana della dialettica hegeliana, ridotta a «quistione scolastica di parole», a superstruttura sradicata dalla struttura, e lo fa, non da ultimo, attaccando la visione crociana dell’arte come puro contenuto mentale separato dalle contraddizioni della realtà storica, materiale e del concetto, riavvicinandosi, seppur implicitamente, alla concezione hegeliana del rapporto di arte e filosofia
Investigating the effects of the greenery increase on air temperature, ventilation and cooling energy demand in Melbourne with the Weather Research and Forecasting model and Local Climate Zones
No full textVegetation has a well-known potential for mitigating urban overheating. This work aims to explore the effects of enhancing urban greenery in Melbourne (Australia) through a configuration of the Weather Research and Forecasting (WRF) model including the Building Effect Parameterization and the Local Climate Zones and presents novelties in: i) covering two-months and ii) focusing on air circulation and buildings cooling energy demand through the ventilation coefficient (VC) and the cooling degree hours (CDHs). A control case and two “what-if” scenarios with a growing green coverage equal to 35 % (control case), 50 % (modest increase) and 60 % (robust increase) have been designed and then simulated for January and February 2019. Outcomes reveal a maximum drop in 2 m temperature of approximately 0.4 °C and 0.8 °C at 14:00 LT for the modest and robust green increase scenario, respectively. The urban-rural energy surplus for cooling buildings is reduced and even counterbalanced. Peak CDHs decrease from 143 °C·h of the control case to 135 °C·h (modest increase) and 126 °C·h (robust increase), while they measure 137 °C·h in the non-urban areas. Average wind speed increases by 0.8 m/s (equal to 22 % with respect to the control case). Furthermore, adding urban greenery has an unfavorable implication on VC (maximum reduction of 500 m2s−1) with a consequent deterioration of the transport and dispersion of pollutants. Middle- and high-density classes are touched more than low-density by the VC reduction. In addition, the benefits of enhancing urban greenery concern physiologically and psychologically the quality of life of the dwellers
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