214 research outputs found
New trends in policy making for transport and regional network integration
No full textInnovation SystemsTechnology, Policy and Managemen
Guest editorial: Resilience of Networks
No full textIn recent years, the complex dynamics of local as well as global transport networks have attracted ever increasing attention due to reports of their multiple failures and deleterious impacts, which have often occurred during disruptive events.
Not only have hazards recently increased in complexity and intensity but their impacts are also no longer confined within the local boundaries of specific transport operations, and instead more widely affect global connections and accessibility.
The above mentioned merge of characteristics within transport systems has compelled scholars and practitioners to place great emphasis on exploring transport systems from different perspectives of resilience and vulnerability. Research findings from the analyses on the various dimensions of transport resilience and vulnerability now allow us to better understand the similarities and differences in systems, but more importantly, they have opened the way for researchers to relate concepts of resilience and vulnerability with those of interdependency and connectivity/accessibility.
From this stand point, it seems necessary to reflect on the relevance of transport network resilience and vulnerability by exploring definitions, interpretations and applications from different methodological/empirical angles and perspectives. This is the platform which has paved the way to this Special Issue (SI)
Resilience and Vulnerability of Spatial Economic Networks
No full textThis Special Issue (SI) brings ‘under one roof’ the work of scholars dedicated to the resilience and vulnerability of systems. Three main strands knit the different contributions together, and constitute the rationale for their selection in this volume: a) resilience/vulnerability; b) dynamic (complex) networks; and c) space-economy. In particular this SI provides a synthetic perspective on the various interpretations of resilience and vulnerability in spatial economic networks, given the different objectives and landscapes, with special attention to the understanding of the effects generated by disruptions of spatial economic systems. Consequently, the selection of articles in this SI offers novel theoretical and empirical insights into the complex dynamics of economic and spatial networks, using new, systematic data sources and employing cutting-edge network analysis and spatial econometric techniques. Within this framework, the chosen contributions analyse transport networks and economic networks – at various spatial scales – with the view to identifying the critical factors that lead to resilient and vulnerable outcomes
Preliminary validation of a non-invasive approach for biomechanical follow-up of heart failure patients
No full textThe mismatch between left ventricle and the aorta in Heart Failure patients reduces the energy transfer between the pump and the arterial load. The ventricle, trying to improve its function, changes his shape, the elastance reduces and mechanical coupling with aorta worsens too. On this basis, the measure of the mechanical coupling between ventricle and aorta may represent a good clinical tool to follow, on a scientific basis, the clinical evolution of CHF patients ( which is still a problem!).
We propose a new non-invasive approach to evaluate the mechanical coupling between heart and aorta, by comparing the ratio between end systolic ventricular volume and systolic pressure, as an estimate of the end systolic elastance (Ees), and the ratio between stroke volume (SV) and aortic pressure pulse (Pa) as an estimation of the mean arterial elastance (Ea). Aorto-ventricular mechanical matching index (Iav) is calculated by the ratio of Ees and Ea.
To test our proposal, 5 patients (3 males and 2 females; mean age: 72 ± 5 years) with HF, submitted to cardiac resynchronisation therapy, were followed periodically to verify if the proposed biomechanical aorto-ventricular matching index, follows the clinical changes. Arterial pressure values were measured non invasively by cuff arterial closure and end systolic ventricular volume was measured by echography. End systolic ventricular pressure was assumed equal to arterial pulse systolic pressure.
Successive measurements were performed by the same specialist and repeated to obtain the best assessment avoiding the inter-observer variability. In the limited group of patients the proposed Iav index follows with high sensitivity and coherence the clinical trend of the subjects
Interstices : l’imaginaire plurilingue de l’écrivain congolais In Koli Jean Bofa
No full textThe writer In Koli Jean Bofane, born in Congo in 1954, is the author of
three novels published by Actes Sud: Mathématiques congolaises (2008), Congo Inc.
Le Testament de Bismarck (2014), and La Belle de Casa (2018). In our essay we
have analysed this work from the angle of plurilingualism and linguistic
imagination and we have studied the strategies used to stage linguistic
heterogeneity. Within the framework of the multiform plurilingualism that has
always characterised Belgian culture in general, and its literary polysystem in
particular, we wanted to highlight the possible cross-fertilisation between the
« irréguliers de la belgité » with one of the most interesting voices of Belgian postcolonisation
sj-docx-1-urj-10.1177_03915603221122731 – Supplemental material for Digital real-time microscopy of ex-vivo tissues: A novel strategy to control surgical accuracy
No full textSupplemental material, sj-docx-1-urj-10.1177_03915603221122731 for Digital real-time microscopy of ex-vivo tissues: A novel strategy to control surgical accuracy by Maria Chiara Sighinolfi, Alessia Cimadamore, Alessandra Cassani, Simone Assumma, Luca Sarchi, Beatrice Filippi, Filippo Turri, Luca Reggiani Bonetti, Antonino Maiorana, Ahmed Eissa, Salvatore Micali, Rodolfo Montironi and Bernardo Rocco in Urologia Journal</p
A comparative analysis between laparoscopy and open colectomy: assessment of perioperative and oncological outcomes
No full textAIM: Aim of the study was to compare two groups of patients affected by colorectal adenocarcinoma that underwent to open colectomy and laparoscopic colectomy respectively, highlighting the advantage and problems.
MATERIAL OF STUDY: This is a retrospective analysis. Between January 2003 and December 2006, 54 patients who underwent colectomy were recruited. Of these, 26 patients underwent open colectomy, and 28 laparoscopy.
RESULTS: For open colectomy the average duration of surgery was 177.9 minutes (surgical time) and 280.4 minutes (time of operating room) with a minimum of 110 and a maximum of 360 minutes, with significant differences according to type of surgery performed and the patient’s clinical history. For laparoscopy the average duration was 293 minutes, (range 135 - 520), with significant differences depending on the portion of the intestinal tract removed.
DISCUSSION: The comparison of two different surgical techniques, laparoscopic and open colectomy revealed some differences. The duration of the resection was greater for laparoscopy when compared to the traditional technique. CONCLUSIONS: Both approaches are technically feasible, safe and oncologically correct. Laparoscopic technique shows a
much more favorable outcome in terms of pain, absence of extensive scarring, the incidence of incisional hernias and
hospital stay -surgery compared with surgery laparotomy
Screening diagnostico del varicocele: ruolo dell'ecografia e dell'esame Doppler nella nostra esperienza di 216 casi di varicocele primitivo
No full textAbbiamo messo a confronto due metodiche non invasive per la diagnosi del varicocele primario: l' ecografia e l'esame Doppler. Abbiamo sottoposto all' ecografia e al Doppler 216 pazienti, 147 dei quali sono stati trattati con la scleroterapia e 69 con un intervento chirurgico. Tutti gli studi ecografici sono stati eseguiti con apparecchiatura Real Time ( trasduttore 7,5 Mhz), mentre l'esame Doppler è stato eseguito con apparecchiatura ad onda continua. I riscontri ecografici sono affidabili per la morfologia testicolare. Il Doppler è utile per valutare il flusso invertito. Nel 4,1% dei casi, l'ecografia non era concorde con l'esame Dopple
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