136 research outputs found
Balla, Turcato, Manzoni, Castellani
No full textLa ricostruzione della linea astrattista del secondo dopoguerra a partire dalla fortuna di Giacomo Ballo sino a Turcato e agli esiti di Enrico Castellani, attraverso le opere della collezione Giorgio Franchetti
De una controversia entre Galileo Galileio y Cesare Cremonini, por cuestiones de dinero.
No full textEl artículo examina un episodio curioso, ocurrido en las relaciones de Galileo Galilei y de su amigo Giovanfrancesco Sagredo -el destacado personaje del Diálogo sobre los dos máximos sistemas del mundo- con el filósofo aristotélico Cesare Cremonini. Estando todavía de profesor en Padua, Galilei entrega al colega y amigo Cremonini, en forma de préstamo, la cuantiosa suma de cuatrocientos ducados. Al trasladarse de Padua a Florencia, el científico confía a Sagredo la tarea de recuperar el dinero prestado. Las cartas numerosas que Sagredo dirigiera a Galilei a tal propósito, nos informan que la cancelación total del préstamo tardó nueve años (1619), gracias a las reiteradas intromisiones del patricio veneciano. Es opinión común de los historiadores, que la tardanza fue causada simplemente por la morosidad y la mala conducta seguida por Cremonini. El autor, en cambio, sugiere una interpretación diferente de los hechos; al tomar en cuenta, de un lado, la presencia de factores financieros que hicieron subir el costo de la deuda; del otro, la forma agresiva con que Sagredo llevó adelante el cuidado de los intereses de Galilei, hasta el extremo de levantar en Cremonini la sospecha de ser objeto de maniobras usureras. Abstract The paper examines a curious episode, taking place in the relations between Galileo Galilei and his friend Giovanfranceso Sagredo –the prominent character from Dialogue on the two highest world systems- with the Aristotelian philosopher Cesare Cremonini. Still a professor in Padua, Galilei loans his colleague and friend Cremonini the considerable amount of four hundred ducats. Upon moving from Padua to Florence, the scientist trusts Sagredo to recover the loaned money. The numerous letters which Sagredo addressed to Galilei to such an end, tell us that the full payment of the loan took nine years (1619), thanks to the Venetian patrician’s repeated meddling. It is a common opinion among historians that the delay was caused simply by Cremonini’s delinquency and misconduct. Instead, the author suggests a different interpretation of the facts, in taking into account, on the one hand, the presence of financial factors which increased the cost of the debt; on the other, the fierceness with which Sagredo took care of Galilei’s interests, to the point of arousing in Cremonini the suspicion of his being the object of usurious maneuvers. 
Estrusione di cromatina nel citoplasma nel corso della germinazione del seme e della differenziazione istologica in Festuca arundinacea Schreber.
No full text
Prolasso degli organi pelvici e sessualità: studio sulla qualità della vita dopo intervento chirurgico di correzione del prolasso [Pelvic Organ Prolapse and sexuality: study on quality of life after prolapse correction surgery]
No full textIntroduzione La sfera della sessualità è spesso gravemente inficiata nelle pazienti portatrici di prolasso degli organi pelvici. Scopo
dell’articolo è indagare la qualità della vita sessuale delle pazienti prima e dopo l’intervento chirurgico. Materiali e metodi È stato condotto uno studio osservazionale di coorte su pazienti sottoposte a intervento chirurgico di sospensione laterale laparoscopica (LLS) e isterectomia per via vaginale con colpopessi uterosacrale (USLs). È stata indagata l’attività sessuale, la comparsa di dispareunia e il grado di soddisfazione nel rapporto col partner al tempo 0 e a 6-12-24 mesi postoperatori nei 2 gruppi. Risultati Sono state sottoposte a intervento chirurgico 195 pazienti portatrici di prolasso: 145 nel gruppo USLs e 41 nel gruppo LLS. Al tempo 0 erano sessualmente attive il 59% del gruppo LLS e il 32,5% del gruppo USLs. La dispareunia era sperimentata dal 60,9% delle pazienti LLS (I grado: 30,4%, II grado: 21,7%, III grado: 8,7%) e dall’80% delle pazienti USLs (I grado: 44%, II grado: 20%, III grado: 16%). 6 mesi dopo l’intervento chirurgico tra le pazienti sessualmente attive, nel gruppo LLS il 15,8% sperimentava dispareunia (tutte di I grado), che nel 10,5% era persistente mentre nel 5,3% de novo; nel gruppo USLs il 37,5% presentava dispareunia, nel 29% dei casi di I grado, nel l’8,3% dei casi di II grado; la dispareunia era persistente nel 16,7%, de novo nel 20,8%.
12 mesi post-intervento nel gruppo LLS la dispareunia era riscontrata nell’ 11% delle pazienti attive (tutte di I grado e di tipo persistente); nel gruppo USLs la prevalenza di dispareunia era del 18,2% (I grado: 9,1%, II grado: 9,1%), di tipo persistente. Infine a 24 mesi post intervento, nel gruppo LLS nessuna lamentava dispareunia; nel gruppo USLs andate a controllo, 2 ( il 40%) presentavano dispareunia (I grado: 20%, II grado: 20%), in 1 paziente de novo, nell’altra di tipo persistente. In risposta al questionario pre operatorio per l’item Relazione col partner, la mediana dei punteggi era di 25 nel gruppo LLS (35 pazienti) e di 33 nel gruppo USLs (70 pazienti). Ai successivi controlli a 6, 12 e 24 mesi la mediana dei punteggi è stata di 0 in entrambi i gruppi in tutti e tre i controlli temporali. Conclusioni Gli interventi chirurgici di sospensione laterale uterina per via laparoscopica e di isterectomia per via vaginale con colpopessi uterosacrale si sono dimostrati efficaci nel migliorare la sessualità riducendo la dispareunia e aumentando il grado di soddisfazione soggettivo della paziente nel rapporto col partner.Introduction Psychological The sexuality is often seriously impaired in patients with pelvic organ prolapse. The aim of the article is to
investigate the quality of sexual life of patients before and after surgery. Materials and methods An observational cohort study was conducted on patients undergoing laparoscopic lateral suspension surgery (LLS) and vaginal hysterectomy with uterosacral colpopexy (USLs). We investigated sexual activity, the appearance of dyspareunia and the degree of satisfaction in the relationship with the partner at time 0 and at 6-12-24 months after surgery in the 2 groups. Results 195 patients with prolapse underwent surgery: 145 in the USLs group and 41 in the LLS group.
At time 0, 59% of the LLS group and 32.5% of the USLs group were sexually active. Dyspareunia was experienced by 60.9% of LLS patients (I degree: 30.4%, II degree: 21.7%, III degree: 8.7%) and 80% of USLs patients (I degree: 44 %, II degree: 20%, III degree: 16%). 6 months after surgery among the sexually active patients, 15.8% in the LLS group experienced dyspareunia (all grade I), which was persistent in 10.5% and de novo in 5.3%; in the USLs group 37.5% had dyspareunia, in 29% of cases of I degree, in 8.3% of cases of II degree; dyspareunia was persistent in 16.7%, de novo in 20.8%. 12 months postoperatively in the LLS group, dyspareunia was found in 11% of active patients (all grade I and persistent type); in the USLs group the prevalence of dyspareunia was 18.2% (I degree: 9.1%, II degree: 9.1%), in all cases persistent. Finally, 24 months postoperatively, none of the LLS group complained of dyspareunia; in the USLs group that went to control, 2 (40%) presented dyspareunia (I degree: 20%, II degree: 20%), in 1 patient de novo, in the other one persistent. In response to the preoperative questionnaire for the item Relationship with partner, the median scores were 25 in the LLS group (35 patients) and 33 in the USLs group (70 patients). At the subsequent controls at 6, 12 and 24 months the median scores were 0 in both groups in all three time controls. Conclusions Laparoscopic lateral uterine suspension surgery and vaginal hysterectomy with uterosacral colpopexy proved to be effective in improving sexuality by reducing dyspareunia and increasing the patient’s subjective degree of satisfaction in the relationship with her partner
On the pressure ripple measurement in variable displacement vane pumps
No full textVane pumps exhibit pressure ripple in the pressure evolution trend during a complete shaft rotation. Pressure ripple can determine oscillating forces within the system leading to vibration and noise generation. In this context, this paper is focused on the experimental measurement of the pressure evolution in vane pumps by using two different methodologies. Results of measurements are shown, highlighting advantages and disadvantages of both methodologies. In the first method a pressure transducer is directly facing the volume between two vanes, in the second method the sensor is located inside an external chamber where the oil is transferred via a ducts suitably designed in the rotor shaft. Briefly, the first method gives better results in terms of pressure evolution but involves some practical problems in the set up: the measurements exhibit pressure offsets strongly dependent on the tightening torque used for sensor mounting and negative pressure values in the low pressure region. The second method is simpler to set up but the results are influenced by the dynamical behavior of the measurement duct carrying oil. In order to avoid resonances of this duct, a vibro-acoustical finite element (FE) model of the oil cavity has been developed. The numerical frequency response functions obtained by the FE model have been used in order to optimize the geometry of the measurement duct, reducing the effects of the resonances of the oil ducts. It is shown that, using this improved methodology, the dynamical components of the measured pressure are not significantly influenced by the frequency response of the measurement duct when the outlet pressures is higher than 50 bar, while for lower outlet pressure the first resonance of the measurement duct is close to the main vane harmonics
Renaissance hackery?
No full textHackers & Painters focuses on the benefits of web-based systems in contrast to the several drawbacks of desktop-centric applications. The author of this text perpetuates the stereotypical hacker-as-nerd. He points that hackers deserve astronomic amounts of money and anyone who doubts this or worries about unequal income distribution is a conformist and definitely a loser. He also reckons that statistical techniques are effective countermeasure against spam. He has even discussed two interesting issues of what it takes to be a successful IT entrepreneur, and whether programming is art or science
“Io ero un pilota d’aereo ma lui era un pilota d’alto mare”: Giorgio Franchetti e Plinio De Martiis
No full textOrganic Spectroscopy
No full textThree complementary techniques are usually covered by modern textbooks dealing with the application of physical methods in organic chemistry, namely, nuclear magnetic resonance spectroscopy (NMR), infrared spectroscopy (IR) and mass spectrometry (MS). Older books used to add ultraviolet-visible (UV-VIS) spectroscopy to this list. While all of these techniques may be successfully applied to the investigation of some particular aspect of a structural study, in these authors' opinion NMR and MS stand out because of the of amount of clear-cut information they provide. In this article NMR and MS are described from the point of view of the organic chemist. Simulated and real life examples are presented with the aim of helping learners to understand which information can be gathered from each of these structural tools.
http://greenplanet.eolss.net/EolssLogn/mss/C06/E6-101/E6-101-13/E6-101-13-TXT.aspx#1._Introductio
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