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Wyszukujesz frazę "safety function" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Estimating the safety performance function for urban unsignalized four-legged one-way intersections in Palermo, Italy
Autorzy:
Giuffrè, O.
Granà, A.
Giuffrè, T.
Marino, R.
Marino, S.
Powiązania:
https://bibliotekanauki.pl/articles/231391.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
funkcja stanu bezpieczeństwa
bezpieczeństwo ruchu
skrzyżowanie miejskie
rozproszenie nadmierne
korelacja
safety performance function
traffic safety
urban intersection
overdispersion
correlation
Opis:
Starting from consideration that urban intersections are sites with promise for safety and operational improvements, the paper describes the steps taken to develop a crash predictive model for estimating the safety performance of urban unsignalized intersections located in Palermo, Italy. The focus is on unsignalized four-legged one-way intersections widespread in Italian downtowns. The sample considered in the study consist of 92 intersections in Palermo, Italy. For the study were collected crashes occurred in the sites during the years 2006-2012, geometric design and functional characteristics and traffic flow. Results showed that data were overdispersed and NB1 distributed. In order to account for the correlation within responses Generalized Estimating Equations (GEE) were used under different working correlation matrices.
Źródło:
Archives of Civil Engineering; 2014, 60, 1; 41-54
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A safe programmable electronic system
Autorzy:
Halang, W.
Śnieżek, M.
Powiązania:
https://bibliotekanauki.pl/articles/200676.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
programmable electronic systems
safety
fail-safe comparison
function block programming
software verification
Opis:
A dual-channel computer architecture for utilisation in programmable logic controllers is presented. Faults can be detected by novel high-speed comparators with fail-safe operation. The cyclic operating mode of PLCs and a specification-level, graphical programming paradigm based on the interconnection of application-oriented standard software function modules are architecturally supported. Thus, by design, there is no semantic gap between the programming and machine execution levels enabling the safety licensing of application software by an extremely simple, but rigorous method, viz., diverse back translation.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 3; 423-434
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probability distribution functions for service loads of frame scaffoldings
Autorzy:
Błazik-Borowa, Ewa
Pieńko, Michał
Szer, Iwona
Hoła, Bożena
Czarnocki, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2128143.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
scaffoldings
service load
extreme events
probability distribution function
safety
rusztowanie
obciążenie usługi
zdarzenia ekstremalne
funkcja rozkładu prawdopodobieństwa
bezpieczeństwo
Opis:
The paper discusses service load measurements (weight of construction materials, small equipment and workers) conducted on 120 frame scaffoldings all over Poland in 2016‒2018. Despite the fact that the scaffolding should ensure the safety of its users, most accidents on construction sites are caused by fall from height. Service loads are one of the elements affecting the safety of scaffolding use. On the basis of the studies, maximum load on one platform and maximum load on a vertical scaffolding module for one day were obtained. They were treated as the random variables of the maximum values. Histograms and probability density functions were determined for these variables. The selection of a probability distribution consisted in the selection of a probability density function by means of fitting curves to the study result histograms using the method of least squares. The analysis was performed for distribution Weibull and Gumbel probability density functions which are applied for maximum values of random variables. Parameters of these functions can be used for the purposes of the reliability analysis to calibrate partial safety factors in simulation of service load during the scaffolding failure risk assessment. Besides, the probability of not exceeding the standard loads provided for frame scaffoldings for 120 weeks was established on the aforementioned basis. The results of the presented research show that in Poland there is a high probability of exceeding the permissible service loads in one year and thus there is a high risk of scaffolding damage.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; e136734, 1--10
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probability distribution functions for service loads of frame scaffoldings
Autorzy:
Błazik-Borowa, Ewa
Pieńko, Michał
Szer, Iwona
Hoła, Bożena
Czarnocki, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2173610.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
scaffoldings
service load
extreme events
probability distribution function
safety
rusztowanie
obciążenie usługi
zdarzenia ekstremalne
funkcja rozkładu prawdopodobieństwa
bezpieczeństwo
Opis:
The paper discusses service load measurements (weight of construction materials, small equipment and workers) conducted on 120 frame scaffoldings all over Poland in 2016‒2018. Despite the fact that the scaffolding should ensure the safety of its users, most accidents on construction sites are caused by fall from height. Service loads are one of the elements affecting the safety of scaffolding use. On the basis of the studies, maximum load on one platform and maximum load on a vertical scaffolding module for one day were obtained. They were treated as the random variables of the maximum values. Histograms and probability density functions were determined for these variables. The selection of a probability distribution consisted in the selection of a probability density function by means of fitting curves to the study result histograms using the method of least squares. The analysis was performed for distribution Weibull and Gumbel probability density functions which are applied for maximum values of random variables. Parameters of these functions can be used for the purposes of the reliability analysis to calibrate partial safety factors in simulation of service load during the scaffolding failure risk assessment. Besides, the probability of not exceeding the standard loads provided for frame scaffoldings for 120 weeks was established on the aforementioned basis. The results of the presented research show that in Poland there is a high probability of exceeding the permissible service loads in one year and thus there is a high risk of scaffolding damage.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 2; art. no. e136734
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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