409 research outputs found
Il divenire della disciplina urbanistica: il contributo di Arnaldo Cecchini
No full textWith this volume - Conversations with TeMA - the Journal opens a new editorial line specifically dedicated to promoting and disseminating the discussion between worldwide researchers on specific issues concerning the contents, methods and timing of our work.
This first experience is dedicated to a deepening, in an interview formula, on the future of spatial planning in Italy both from a regulatory and technical-disciplinary perspective, also concerning what is happening in other countries. In line with the aims we had set, we decided to involve, in this first phase, both colleagues working in Italian universities and those working in foreign universities and research centres.
This contribution is by Arnaldo Cecchini, Former Full Professor in Urban Planning, University of Sassari
 
Dalle caverne alla casa domotica: storia del comfort
No full textRecensione del volume di Federico Butera: Dalla caverna alla casa ecologica.
Pagina dopo pagina l’autore
ripercorre, come in un avvincente romanzo,
la lunga strada verso il comfort domestico
a partire dalla caverna degli uomini primitivi,
passando per le dimore della Roma Imperiale,
per quelle medievali, rinascimentali, fino alle
nostre comode, confortevoli, superaccessoriate
ed energivore case. Descrive i modi, gli
artifici, le tecnologie disponibili nelle varie
epoche per difendersi dal caldo e dal freddo,
per illuminare, per avere l’acqua. E le trovate,
le intuizioni, le scoperte, spesso geniali, che
hanno costituito le tappe significative di questo
cammino verso il comfort: dall’ipocausto
dell’antica Roma all’introduzione del vetro
alle finestre, dalle prime stufe all’illuminazione
elettrica
Le parole del design. 150 lemmi tecnici liberamente scelti
No full textDa Affordance a Vetro Float, il volume illustra il significato di centocinquanta lemmi scelti perché illustrano tecnologie innovative o lavorazioni artigianali che rischiano di perdersi; perché legati alla gestione ambientale o alla proprietà intellettuale; perché raccontano nuove strumentazioni o attrezzi quasi scomparsi; perché restituiscono una classificazione esaustiva di prodotti diversi o perché fanno riferimento alle nuove frontiere dell’infinitamente piccolo. Più il mondo si complica, si globalizza, si dilata, più è necessario che i linguaggi siano univoci e comprensibili, senza perdere in ricchezza, così - strettamente tecnici o più di scenario - i centocinquanta lemmi contenuti nel volume restituiscono il significato delle parole e le loro connessioni che formano la fitta rete alla base del fare e del comunicare il design. Un sapere puntuale di supporto a nuove immaginazioni, che dalla carta stampata può portare al web con una chiave di ricerca in più. I lemmi sono introdotti da un saggio iniziale di Cecilia Cecchini che fornisce una riflessione sul tema della trasmissione delle conoscenze nel campo del design nell'epoca contemporanea e da uno di Felice Ragazzo relativo ai mutamenti in corso nel campo delle tecnologie e delle conseguenze prodotte in seno al design.The more the world expands and becomes complicated and globalised, the more languages need to be comprehensible and universal, whilst retaining their complexity and linguistic richness. Thus, the 150 terms in this book – which are either strictly technical or more generally associated with the field – restore the meaning of words and their associations, aspects that form the dense network that lies at the heart of communicating and practising design.
They were chosen by the author for various reasons: because they illustrate either innovative technologies or artisan skills that we risk losing forever; because they describe either new instruments or tools that have almost disappeared; because they are associated with environmental management or intellectual property; because they reinstate an exhaustive classification of various different products, or because they refer to the new frontiers of the infinitesimal.
This book provides accurate information that can even lead from the printed page to the Internet, tackled with greater technical awareness, allowing us to choose wisely from the infinite amount of information available online.
Listed in alphabetical order, the terms are preceded by the author’s analysis of how knowledge is imparted in the field of design, particularly focusing on the changes induced by the technological acceleration of recent years. There follows an essay by Felice Ragazzo on the relationship between design, technology and science.
The book was chosen by the 2013 ADI Design Index. As it soon sold out, it was reprinted in 2014 (the cover of the attached PDF is that of the 2014 edition, which is identical to the original edition except for the note announcing its selection by the ADI Design Index)
Progettazione e realizzazione di smart materials a controllo passivo per applicazioni acustiche = Design and manufacturing of passive materials for acoustic applications
No full textThe Dilatancy (Shear-thickening) is a time-independent behaviour exhibited by some non-Newtonian fluids, consisting in an abrupt increase in the apparent viscosity with the shear rate. These fluids can be used to design novel composite materials with increased sound insulating properties: in order to optimize their rheological properties, a refined model of their constitutive behaviour is necessary. The objective of the first part of the thesis is the optimization of the rheological behaviour of these fluids. A coupled steady/oscillatory shear rheological approach was employed in order to derive a novel master curve for the material: this allows to predict the best combinations of fillers and carriers capable of granting the final product with the highest sound insulation capabilities. Finally, during the second part of the thesis, numerical models for the sound insulation of the fully assembled smart material were developed and validated with experimental sound insertion loss tests
DOE analysis of the rheological data of shear-thickening fluids for puncture-resistant composite shells
No full textThe dilatancy (Shear-thickening) is a time-independent rheological behaviour exhibited by some non-Newtonian fluids. These fluids manifest a surge in the apparent viscosity with an increase in the shear rate. If these fluids are encapsulated, they can be used to manufacture high-end stab resistance inserts (Cecchini et al., 2018) [1]. In the first part of this work, a comparison between the rheological performance of different shear-thickening fluids (STFs) based on nanosilica dispersed in glycols is presented. This analysis attempts to investigate the combinations of fillers and carriers with the highest energy-absorbing capabilities, among the various glycol-based colloidal STFs. In the second part, the influence of the composition of the STF on its rheological properties is analyzed statistically. The statistical analysis is performed by evaluating the interaction between the main design variables of the fluids (filler dimension, weight-to-weight ratio and molecular weight of the carrier). Finally, the puncture resistance of a composite system obtained by encapsulating the previously manufactured shear-thickening fluids in a polymeric shell is analyzed by means of a high-speed puncture test. This test is performed on the mockup of a tyre tread containing the best performing STF. The results showed that the use of the STF core increased the resistance to puncture by 20% as compared to the same volume of tyre tread material. Furthermore, the STF hermetically sealed the pierced sample, even when the tyre mockup was inflated at high internal pressures
THE RIGHT TO RESIST AND THE HIERARCHISATION OF CITIZENSHIP. CHALLENGING HOW POLICY PRODUCES VULNERABILITY
No full textThe study explores how realities of migrants' and allies' collective organising, dissenting from the Italian institutional discourse on “migration”, produce knowledges that can offer alternative spaces to rethink the evolution of the law. It analyses how (im)mobility is problematised in Italian and European policy, arguing that the migrant person’s condition of socio-juridical vulnerability is produced by the law itself. Interrogating the contingency of the existing system and its inegalitarian and hierarchical structures, the research approaches the current order of things through the question: 'what if it was otherwise?'. Informed by the counternarratives of the migrant political subject, it attempts to create a space for criticism and reinterpretation of policy where the dogmatic paradigms of the sovereign state, the border, security, citizenship and the rights attached to it are approached as assumptions that can be contested and denaturalised. Arguing that migrants’ and allies’ realities promote a vision of substantial equality while seeking legal reform, the study reflects on the right of resistance in the context of the social conflict, with a view to explore the potential that this has for normative change and for the evolution of constitutional principles guarding the human person in their corporeality, as inhabitant of the earth.The study explores how realities of migrants' and allies' collective organising, dissenting from the Italian institutional discourse on “migration”, produce knowledges that can offer alternative spaces to rethink the evolution of the law. It analyses how (im)mobility is problematised in Italian and European policy, arguing that the migrant person’s condition of socio-juridical vulnerability is produced by the law itself. Interrogating the contingency of the existing system and its inegalitarian and hierarchical structures, the research approaches the current order of things through the question: 'what if it was otherwise?'. Informed by the counternarratives of the migrant political subject, it attempts to create a space for criticism and reinterpretation of policy where the dogmatic paradigms of the sovereign state, the border, security, citizenship and the rights attached to it are approached as assumptions that can be contested and denaturalised. Arguing that migrants’ and allies’ realities promote a vision of substantial equality while seeking legal reform, the study reflects on the right of resistance in the context of the social conflict, with a view to explore the potential that this has for normative change and for the evolution of constitutional principles guarding the human person in their corporeality, as inhabitant of the earth
Laparoscopic subtotal pancreatectomy: the right edge of the distal resection
No full textCase
We report a case of an obese (BMI 30.) 48 year-old male patient who presented with recurrent upper abdominal pain. He was found to have a symptomatic cystic mass in the neck of the pancreas.. US demonstrated a 5 cm hypoechoic cystic mass of the pancreatic isthmus. Serum CA 19-9 was slightly elevated. CT and MRI findings were consistent with a mucinous cystoadenoma/cystoadenocarcinoma. EUS-FNAB diagnostic of a cystic lesion with no evidence of malignant cells. A 6-month follow up MRI scan demonstrated the lesion had increased in size, strengthening the suspicion for mucinous cystoadenocarcinoma. The patient underwent a laparoscopic subtotal pancreatectomy and splenectomy. The pancreatic transection was extended to the left side of the gastroduodenal artery. The surgical procedure was technically demanding due to the patient’s visceral obesity and the anatomical location of the lesion. The postoperative course was complicated by a grade B pancreatic leak, managed conservatively. The pathology report demonstrated a pancreatic lympho-epithelial cyst which was resected with a clear surgical margin.
Conclusions
Laparoscopic distal pancreatectomy and splenectomy for a pancreatic neck lesion can be extended to the left side of the gastroduodenal artery in order to obtain a clear resection margin. Even if obesity increased the techinical difficulty, it should not be considered a contraindication to laparoscopic approach
Conspicuously Inconspicuous: Federico Baronello’s EUR_Libya and the Photographic Memory of Italian Colonialism
No full textComputed tomography volumetric fat parameters versus body mass index for predicting short-term outcomes of colon surgery.
No full textBACKGROUND: At present, the impact of obesity on short-term outcomes of general surgery remains controversial, especially in the field of laparoscopy. Most studies on the subject have used the body mass index (BMI) to define obesity without distinguishing between visceral and subcutaneous storage. Computed tomography (CT) volumetric analysis permits accurate evaluation of site-specific volume of adipose tissue. The purpose of this study was to compare CT volumetric fat parameters and the BMI for predicting short-term outcomes of colon surgery.
METHODS: A retrospective analysis was conducted of 231 consecutive patients undergoing elective colon resection, with open or laparoscopic technique, from January 2007 to April 2009. CT volumetric quantification of abdominal visceral and subcutaneous adipose tissue was performed. Intraoperative and perioperative data were collected.
RESULTS: A total of 187 patients were enrolled. BMI showed a direct correlation with fat volumetric parameters but not with the visceral/subcutaneous fat ratio. Operating time was correlated with subcutaneous fat storage and BMI in the laparoscopic right colectomy subgroup. No associations were found with the conversion rate. Length of the hospital stay was correlated with the visceral/subcutaneous fat ratio in the laparoscopic left colectomy subgroup. Whereas the overall postoperative complication rate and mortality were not associated with fat parameters, the postoperative surgical complication rate was associated with visceral volumetric parameters in the laparoscopic left colectomy subgroup.
CONCLUSIONS: Short-term outcomes of colon surgery are better predicted by fat volumetric parameters than by the BMI. This study has provided new elements for discussion on the impact of visceral and subcutaneous adiposity in laparoscopic and traditional colon surgery
Metamateriali fonoassorbenti sviluppati via 3d printing per interventi acustici nel settore automotive
No full textIl punto cardine del lavoro è la prototipazione e caratterizzazione di metamateriali fonoassorbenti, potenzialmente destinabili ad interventi di correzione acustica in ambito automobilistico, basati su un risonatore di Helmholtz a cavità irregolare implementato con filtri porosi realizzati via 3D printing. Il suddetto sistema si prefigge lo scopo di minimizzare l’annoyance in abitacolo dovuto ad un fenomeno che va sotto il nome di Cavity Noise (CN), scaturente in seguito all’interazione pneumatico-strada. La manifattura additiva offre la possibilità di modulare le caratteristiche strutturali dei filtri e quindi sintonizzare le proprietà fonoassorbenti in funzione del fenomeno sonoro da mitigare.The key point of the work is the prototyping and characterization of sound-absorbing metamaterials, potentially intended for acoustic interventions in the automotive sector, based on an irregular-cavity Helmholtz resonator implemented with porous filters made via 3D printing. The purpose of the system is to minimize the annoyance in the car cockpit due to a phenomenon defined Cavity Noise (CN), resulting from the tire-road interaction. Additive manufacturing gives the possibility to modulate the structural properties of the filters and then tune the sound-absorbing performances according to the acoustic phenomenon to be mitigate
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