Search results for "fire"

PLLA/Fibrin Tubular Scaffold: A New Way for Reliable Endothelial Cell Seeding

2014

In the present work a simple and quick technique for cell seeding into tubular-shaped scaffolds, which allows a homogeneous cell distribution, was tested. The poly-L-lactide (PLLA) scaffolds, prepared via diffusion induced phase separation (DIPS), were filled with fibrin gel in order to obtain a hybrid scaffold for Vascular Tissue Engineering applications. The formation of immobilized fibrin networks on the inner surface of the tubular scaffolds was observed using confocal microscopy and SEM. Morphological analysis of the so-obtained scaffold revealed that the fibrin gel is uniformly distributed on the internal surface of the scaffold, leading to an organized structure. Moreover a penetrati…

Deep Convolutional Neural Networks for Fire Detection in Images

2017

Detecting fire in images using image processing and computer vision techniques has gained a lot of attention from researchers during the past few years. Indeed, with sufficient accuracy, such systems may outperform traditional fire detection equipment. One of the most promising techniques used in this area is Convolutional Neural Networks (CNNs). However, the previous research on fire detection with CNNs has only been evaluated on balanced datasets, which may give misleading information on real-world performance, where fire is a rare event. Actually, as demonstrated in this paper, it turns out that a traditional CNN performs relatively poorly when evaluated on the more realistically balance…

University Hospital Fire Disaster — Lessons to Learn

1995

Reports on hospital fire disasters are only rarely published in medical journals, and then only in journals dealing with fire fighting or hospital management. Blumenhagen found only two English language articles published between 1977 and 1987, according to which 24 500 severe events were registered in the USA, equalling three events per institution per year. However, only 30–40% of these events were reported to the fire department. In the USA only 11% of all registered events caused damage amounting to more than US$ 1 000 000.

Nowy i pewny sposób ochronienia słomianych dachów i budowli drewnianych od poźarów

1822

Do fire severity effects on soil change in space and time in the short-term? What ash tells us

2013

n the absence of data, the impact of fire, especially wildfires, is measured analysing the fire severity. This post-fire assessment is very useful because allow to identify the degree of destruction imposed by the fire. Among the techniques used to determine fire severity, ash colour is often used, that permit identify the degree of organic matter consumption (darker ash uncompleted combustion, lighter ash completed combustion). The objective of this paper was observed if fire severity changes in space and time, according to ash colour analysis, applying an index. The ash colour analysis was carried out one and fifteen days after the fire. In this area we identified ash with four different …

Combining Top-down and Bottom-up Visual Saliency for Firearms Localization

2014

Object detection is one of the most challenging issues for computer vision researchers. The analysis of the human visual attention mechanisms can help automatic inspection systems, in order to discard useless information and improving performances and efficiency. In this paper we proposed our attention based method to estimate firearms position in images of people holding firearms. Both top-down and bottom-up mechanisms are involved in our system. The bottom-up analysis is based on a state-of-the-art approach. The top-down analysis is based on the construction of a probabilistic model of the firearms position with respect to the people’s face position. This model has been created by analyzi…

Adaptīva lietotāja saskarne adrešu un plānotāja grāmatas Android lietotnes kontekstā

2019

Lietotāja saskarne ir tā, kas savieno lietotāju un lietojumprogrammu. Tas ir viens no vissvarīgākajiem aspektiem, kas rada lielu interesi par lietojumprogrammu. Daudzi dizaineri lietojumprogrammās piemēro adaptīvo lietotāja interfeisa (AUI) dizainu, lai lietotāji varētu justies laimīgi un apmierināti, lietojot programmu. Rakstā aprakstīta Android programmas, kas saucas Address&Planner Book, izstrāde, kurā var saglabāt svarīgus kontaktus un plānus un informēt lietotājus. Lietojumprogramma varētu pielāgot lietotāja saskarņu saturu un dizainu atbilstoši kontekstam, kas saistīts ar katru lietotāju, lai paredzētu lietotāja darbības un piedāvātu ērtu lietošanu. Programma ir izstrādāta, izmantojot…

Hybrid chaotic firefly decision making model for Parkinson’s disease diagnosis

2020

Parkinson’s disease is found as a progressive neurodegenerative condition which affects motor circuit by the loss of up to 70% of dopaminergic neurons. Thus, diagnosing the early stages of incidence is of great importance. In this article, a novel chaos-based stochastic model is proposed by combining the characteristics of chaotic firefly algorithm with Kernel-based Naïve Bayes (KNB) algorithm for diagnosis of Parkinson’s disease at an early stage. The efficiency of the model is tested on a voice measurement dataset that is collected from “UC Irvine Machine Learning Repository.” The dynamics of chaos optimization algorithm will enhance the firefly algorithm by introducing six types of chao…

Firewall as a service in SDN OpenFlow network

2015

Protecting publicly available servers in internet today is a serious challenge, especially when encountering Distributed denial-of-service (DDoS) attacks. In traditional internet, there is narrow scope of choices one can take when ingress traffic overloads physical connection limits. This paper proposes Firewall as a service in internet service providers (ISP) networks allowing end users to request and install match-action rules in ISPs edge routers. In proposed scenario, ISP runs Software Defined Networking environment where control plane is separated from data plane utilizing OpenFlow protocol and ONOS controller. For interaction between end-users and SDN Controller author defines an Appl…

Charcoal analysis and wood diameter: inductive and deductive methodological approaches for the study of firewood collecting practices

2011

International audience; We present and discuss two approaches for evaluating the diameter of carbonized wood.Results from a theoretical model and its experimental validation shows that the proportions of diameter classes predicted by the model can be recognized. Even though the measured caliber classes do not correspond to the reality of the initial diameters, the measures were sufficiently different and reproductive to be discriminated through factorial analysis. These methods are promising for documenting cultural behavior of past peoples related to firewood use and management