203 research outputs found
Oswald Mathias Ungers, Aldo Rossi: regesto delle opere analizzate
No full textIl Laboratorio di Progettazione del l anno è stato suddiviso
in due parti: il ridisegno di un'architettura e l'esercitazione
progettuale sul tema dell'abitare al Rupenhom dì Oswald
Mathias Ungers e nel complesso residenziale San Rocco
di Aldo Rossi. Il ridisegno pone come obbiettivo primario
lo studio preliminare di un'architettura
Agli studenti, suddivisi in gruppi di due persone, è stata
assegnata un'opera da analizzare per mezzo del ridisegno.
Le architetture esaminate riguardano principalmente
le residenze ed edifici pubblici come scuole, musei,
biblioteche. Nella prima parte del corso gli studenti
provenienti da diverse scuole e con formazioni culturali
differenti, si trovano a rapportarsi per la prima volta con
l'architettura e con la disciplina del disegno: risulta quindi
fondamentale fornire loro gli strumenti completi per
un'analisi compositiva dell'architettura Per consentire un
avvicinamento graduale al progetto è stata fornita una
bibliografia riguardante l'autore e l'opera, al fine di indirizzare
lo studio sulla personalità ed il clima culturale, stimolando al
contempo l'attenzione verso l'approfondimento dell'ambito
di ricerca Ed è proprio sulla ricerca bibliografica che
gli studenti hanno impostato l'analisi iniziale dell'opera
Ricerca che consiste principalmente nel reperire i disegni
di progetto: piante, prospetti, sezioni, assonometrie. Parte
delle opere selezionate non sono realizzate e di alcune
non esiste una documentazione completa Pertanto agli
studenti è richiesta una ricostruzione anche tridimensionale
per completarne l'apparato iconografico.
La rielaborazione grafica non rappresenta da questa
prospettiva un semplice procedimento di restituzione del
manufatto studiato, ma costringe lo studente ad un'attenta
verifica dei rapporti tra le parti della composizione stessa,
chiarendo in questo modo il significato profondo del
progetto considerato. Il ridisegno assume dunque il valore
di decisiva assimilazione dei criteri della progettazione:
rapporti di proporzione, modularità, ritmo, simmetria,
conoscenza tipologica divengono i principi informatori con i
quali condurre gli allievi verso il progetto d'architettura
New insights into the symbiosis between Zanclea (Cnidaria, Hydrozoa) and scleractinians.
No full textLife cycle analysis of environmental impact vs. durability of stabilised rammed earth
No full textRammed earth (RE) has enjoyed a revival in recent decades due to the increasing awareness of environmental issues surrounding the building industry. Although RE in its traditional form is deemed a highly environmentally-friendly material, the same cannot be said for its modern stabilised counterpart. Comprehensive experimental procedures exist to estimate mechanical strength properties of stabilised RE (SRE). However, tests for material durability are far less common. Engineers and practitioners therefore assume that strength and durability are interchangeable properties, i.e. the stronger the material, the more durable. Inflated strengths are recommended to ensure adequate durability, leading to high environmental costs through excessive use of stabilisers. This paper rates the relevance of two acknowledged durability tests (accelerated erosion due to sprayed water and mass loss due to wire brushing) and relates outcomes to the strength and the environmental impact of several SRE mixes. The environmental impact of each mix was estimated using attributional and consequential life cycle assessment (LCA) approaches as well as an assessment of cumulative energy demand. Results demonstrated that it is possible to have durable SRE mixes without paying the cost of using environmentally-expensive stabilisers
DBB - A Distorted Brain Benchmark for Automatic Tissue Segmentation in Paediatric Patients
No full textT1-weighted magnetic resonance images provide a comprehensive view of the morphology of the human brain at the macro scale. These images are usually the input of a segmentation process that aims detecting the anatomical structures labeling them according to a predefined set of target tissues. Automated methods for brain tissue segmentation rely on anatomical priors of the human brain structures. This is the reason why their performance is quite accurate on healthy individuals. Nevertheless model-based tools become less accurate in clinical practice, specifically in the cases of severe lesions or highly distorted cerebral anatomy. More recently there are empirical evidences that a data-driven approach can be more robust in presence of alterations of brain structures, even though the learning model is trained on healthy brains. Our contribution is a benchmark to support an open investigation on how the tissue segmentation of distorted brains can be improved by adopting a supervised learning approach. We formulate a precise definition of the task and propose an evaluation metric for a fair and quantitative comparison. The training sample is composed of almost one thousand healthy individuals. Data include both T1-weighted MR images and their labeling of brain tissues. The test sample is a collection of several tens of individuals with severe brain distortions. Data and code are openly published on BrainLife, an open science platform for reproducible neuroscience data analysis
Weathering’s beneficial effect on waste-stabilised rammed earth:a chemical and microstructural investigation
No full textThe most common method to improve the mechanical properties of a rammed earth mix is to add chemical stabilisers like cement and/or lime. Varying the stabiliser type will affect strength gain but also the environmental impact. In this paper, the effect of wetting-drying cycles on the long-term unconfined compressive strength of stabilised rammed earth (SRE) mixes was investigated through the chemical characterisation of the soil components and microstructural analyses. The mixes were stabilised using different agents characterised by distinct environmental impacts, such as cement, calcium carbide residue and fly ash. These last two are considered waste materials, significantly affecting their use’s associated environmental implications. The results of this experimental campaign support others in this series of work and showed an improvement of the mechanical properties after cyclic wetting-drying due to the formation of new hydration products which bound particles together. The use of waste materials proved to be an effective solution to stabilise RE
Gender differences among cancer nurses' stress perception and coping: An Italian single centre observational study
No full textThe literature on gender differences in stress perception and coping has been produced diverse results, and there is a shortage of studies on this topic among cancer nurses. For this reason, the aim of this study was to describe the gender differences related to cancer nurses' stress perception and coping. This study had a cross-sectional design, using a secondary data analysis on dataset (sample = 126 cancer nurses, 74% females). The stress perception and the coping strategies were assessed using Burnout Potential Inventory (BPI) and Health Profession Stress and Coping Scale, nurses' version (HPSCS). Female cancer nurses perceived more stress from personal attacks than males. Indeed, female over 45 years had a significant higher perception of stress, but they used the request for social support (functional coping) as a coping strategy more than males. Our results could help to clearly understand what are the main gender differences in coping and in perceiving stress among Italian cancer nurses, and to incentive more research
Modification produced by ischemia on some cerebral enzyme activities related to energy transduction
No full textInvestigating burnout situations, nurses’ stress perception and effect of a post-graduate education program in health care organizations of northern Italy: a multicenter study
No full text
- …
