Search results for "Critica"
showing 10 items of 4441 documents
Combined gasification-oxidation system for waste treatment with supercritical water: Lca and performance analysis
2020
In this study the environmental performance of a first-of-its-kind integrated process based on supercritical water gasification and oxidation (SCW-GcO), was evaluated using life cycle assessment (LCA). The process was applied to the treatment of carbon black and used oil as model wastes. Mass and energy balances were performed using Aspen Plus, and the environmental assessment was carried out through SimaPro. A “from cradle to grave” approach was chosen for the analysis, considering impact categories such as climate change, ozone depletion, human toxicity, particulate matter, land use, resource depletion, and other relevant indicators. The environmental profile of the SCW-GcO process was co…
The ELECTRE I method to support the FMECA
2018
Abstract In traditional Failure Modes, Effects and Criticality Analysis (FMECA), risk priorities of failure modes are determined through the Risk Priority Number (RPN), which is a function of the three risk parameters Occurrence (O), Severity (S), and Detection (D). In the present paper, an alternative approach to RPN is proposed for the criticality assessment of system failure modes. Particularly, the Multi-Criteria Decision Making (MCDM) method ELECTRE I is proposed to select the most critical failure mode in the set of the failure modes charactering a complex system. The method has been applied to a case study previously proposed by Zammori and Gabrielli (2012).
The Role the Static Maximization Approach Plays in Neoclassical Analyses
1994
This is an article on the methodology of economic thought. The critical assessment of the neoclassical research programme contained here basically comes from the contributions of J.M. Buchanan, Nobel prize winner in Economics 1986. These comments are aimed at pointing out the role that the static maximization approach plays in neoclassical analyses since L. Robbins and P. Samuelson’s influential contributions came about after World War II. Just to complement this basic purpose, I present in section 4 the alternative methodological foundations J.M. Buchanan proposes and uses to replace the static maximization approach when building public choice analyses and I sketch in section 5 several pe…
Visualization of Exchanged Information with Dynamic Networks: A Case Study of Fire Emergency Search and Rescue Operation
2017
To perform emergency response activities, complex networks of emergency responders from different emergency organizations work together to rescue affected people and to mitigate the property losses. However, to work efficiently, the emergency responders have to rely completely on the data which gets generated from heterogeneous data sources during search and rescue operation (SAR). From this abundant data, rescue teams share needed information which is hidden in the abundant data with one another to make decisions, obtain situational awareness and also to assign tasks. Moreover, understanding and analyzing the shared information is a complex and very challenging task. Therefore, in this pap…
How Critical Infrastructure Orients International Relief in Cascading Disasters
2016
Critical infrastructure and facilities are central assets in modern societies, but their impact on international disaster relief remains mostly associated with logistics challenges. The emerging literature on cascading disasters suggests the need to integrate the nonlinearity of events in the analyses. This article investigates three case studies: the 2002 floods in the Czech Republic, Hurricane Katrina in 2005 and the 2011 Tohoku earthquake, tsunami and Fukushima meltdown in Japan. We explore how the failure of critical infrastructure can orient international disaster relief by shifting its priorities during the response. We argue that critical infrastructure can influence aid request and …
Understanding the Importance of Proper Incentives for Critical Infrastructures Management – How System Dynamics Can Help
2016
International audience; Computer and information systems are now at the core of numerous critical infrastructures. However, their security management is by far not a trivial issue. Further, these systems, by their very nature, belong to the domain of complex systems, where system dynamics (SD) is an established method, which aims at modelling such systems, their analysis and understanding. Further, on this basis it enables simulation of various policies to properly manage complex systems. More precisely, through understanding of the basic elements of the whole mosaic and their interplay, proper incentives can be tested. And this is important, because proper incentives can lead to the desire…
Anästhesie bei Patienten mit Porphyrie
2019
Die Porphyrien sind eine Gruppe vorwiegend hereditarer Stoffwechselstorungen der Hambiosynthese. Die Betreuung eines Patienten mit akuter Porphyrie ist eine interdisziplinare Herausforderung, bei der die Anasthesie eine koordinierende Funktion erfullt. Da es fur die Porphyrien bislang keine kausale Therapie gibt, richtet sich das Vorgehen im akuten Schub nach dem klinischen Bild. Im anasthesiologischen Umfeld ist insbesondere auf die Verwendung „sicherer“ Medikamente zu achten!
Prediction of Difficult Tracheal Videolaryngoscopic Intubation Using El-Ganzouri Risk Index
2017
Summary Introduction. Unanticipated difficult intubation still exists as a significant problem. El-Ganzouri risk index is a bedside difficult airway evaluation method, which can help determine risk of difficult airways. However, evidence of using of El-Ganzouri risk index in difficult laryngeal visualisation using videolaryngoscopes is limited. Aim of the Study. Determine the specificity and sensitivity of El-Ganzouri multivariate risk index to predict difficult laryngeal exposure using Storz C-MAC videolaryngoscope equipped with D type blade. Material and methods. We conducted a study of 29 patients, which were examined using El-Ganzouri risk index before induction of anaesthesia. After in…
Drenaggio toracico in Pronto Soccorso
2021
Riassunto Il drenaggio toracico e una procedura comune in medicina d’urgenza, indicata per gli pneumotoraci spontanei (primari o secondari) o traumatici e i versamenti pleurici liquidi: emotorace, pleurite purulenta o versamento parapneumonico complicato. Il drenaggio toracico si inserisce in una gestione multidisciplinare che coinvolge urgentisti, pneumologi, chirurghi toracici e rianimatori. La tecnica utilizzata deve essere nota ai medici che prendono in carico questi pazienti. Possono essere utilizzati diversi tipi di drenaggio e le loro indicazioni differiscono a seconda della natura del versamento. Il classico drenaggio con trocar resta, attualmente, indicato in caso di versamento liq…
Factores de riesgo asociados a eventos adversos en recién nacidos portadores de catéteres centrales de inserción periférica
2019
Resumen Introduccion Los cateteres centrales de insercion periferica se han convertido en una prioridad en los neonatos que necesitan terapia intravenosa de larga duracion, pero su uso no esta exento de riesgos. Objetivo Describir la aparicion de eventos adversos en neonatos portadores de cateteres venosos centrales de insercion periferica y determinar factores de riesgo asociados a ellos. Metodos Se llevo a cabo un estudio descriptivo transversal en el que se incluyeron la totalidad de neonatos portadores de cateteres venosos centrales de insercion periferica desde el 1 de octubre de 2014 hasta el 30 de septiembre de 2015. Se registraron los eventos adversos y variables sociodemograficas y…