1,720,978 research outputs found
Il cilindro: "semplice" superficie, duttile, espressiva, funzionale in architettura.
No full textSin dall’antichità esiste fra Architettura e Matematica un legame culturale, di cui viene colto un particolare aspetto: la geometria può essere fonte ispiratrice dell’architetto. Nella conversazione vengono prese in considerazione superfici dalle più semplici alle più complesse osservando, attraverso di esse, la forma in edifici molto diversi per storia, geografia, progetto, funzione. In particolare ci si sofferma su una forma geometrica: la superficie cilindrica, solo in apparenza semplice e se ne cercano modelli reali nel mondo, per poi fermare con maggior attenzione lo sguardo verso la realtà urbana genovese
Surgical treatment of pararenal aortic aneurysm in the elderly
No full textAim. Until fenestrated endografts will become the standard treatment of pararenal aortic aneurysms, open surgical repair will currently be employed for the repair of this condition. Suprarenal aortic control and larger surgical dissection represent additional technical requirements for the treatment of pararenal aneurysms compared to those of open infrarenal aortic aneurysms, which may be followed by an increased operative mortality and morbidity rate. As this may be especially true when dealing with pararenal aneurysms in an elderly patients' population, we decided to retrospectively review our results of open pararenal aortic aneurysm repair in elderly patients, in order to compare them with those reported in the literature.
Methods. Twenty-one patients over 75 years of age were operated on for pararenal aortic aneurysms in a ten-year period. Exposure of the aorta was obtained by means of a retroperitoneal access, through a left flank incision on the eleventh rib. When dealing with interrenal aortic aneurysm the left renal artery was revascularized with a retrograde bypass arising from the aortic graft, proximally bevelled on the ostium of the right renal artery.
Results. Two patients died of acute intestinal ischemia, yielding a postoperative mortality of 9.5%. Nonfatal complications included 2 pleural effusions, a transitory rise in postoperative serum creatinine levels in 3 cases, and one retroperitoneal hematoma. Mean renal ischemia time was 23 min, whereas mean visceral ischemia time was 19 min. Mean inhospital stay was I I days.
Conclusion. Pararenal aortic aneurysms in the elderly can be surgically repaired with results that are similar to those obtained in younger patient
Architetture in superficie: superfici ad onda in architettura
No full textLe autrici di un volumetto a carattere divulgativo che riprende il titolo della conversazione, vanno alla ricerca in famose architetture, ridotte virtualmente all’essenziale, di una comune anima geometrica: la superficie che ne determina la forma.
Motivazioni ed effetti funzionali, estetici ed emozionali rendono, in particolare, le superfici sinusoidali (onde matematiche) di notevole interesse in Architettura. Gaudì, Piano, Borromini, Calatrava sono affascinati dall’andamento delle superfici a onda. Geometricamente le vediamo come superfici rigate: dalle superfici cilindriche ai conoidi, passando attraverso superfici rigate con linee guida sinusoidali. Le ritroviamo in una chiesa, un museo, una scuola, una stazione
Mathematics becomes painting creations
No full textA joint experience, in teaching Mathematics, of the Architectural and Engineering Schools of the Politecnico di Milano and Universidad de Granada is presented.
The results, proposed in Laboratory, are the applications of the basic knowledge related to the definition and behavior of two-variable functions and of the language of Parametric Geometry. Precisely, mathematical methods providing metamorphosis of three-dimensional objects are considered.
The goal is to show how mathematical topics, of a certain difficulty, are actually justified in a historical context and are, therefore, made appreciable through graphic applications of remarkable vivacity and unpredictability
Stanley Kubrick’s Perfection and the Divine Proportion
No full textAbstract In cinematography, Stanley Kubrick is universally known as one of the
most significant proponents. He experimented several cinematographic styles: from
noir to horror, from historic to science fiction, from psychologicalmovies towar films.
Obsessed about perfection, he was in absolute charge of every part of the making of
his films (production, writing, filming and editing) [1–3]. In this paper, we underline
how Kubrick loved to play with the symbolic meaning of his choices, with playful
mechanisms and with perfect symmetries. His movies are also tightly bound to the
other arts (painting, literature, music, theatre, architecture). Furthermore, one must
not forget his strong relationship to mathematics, from which he takes logical rigour
and expressive harmony. Through this research, we reveal an adherence to the sense
of harmony and to the magic of the golden section in unforgettable and strongly
symbolic shots which characterise masterpieces like Barry Lyndon or A Clockwork
Orange
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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