Autor: Ziółkowski, Robert - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Drivers’ speed behaviour in the vicinity of additionally illuminated pedestrian crossings
Autorzy:: Ziółkowski, Robert
Powiązania:: https://bibliotekanauki.pl/articles/2098186.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: drivers’ speed behaviour
average Speer
pedestrian crossing
additional lighting system
zachowanie kierowców w zakresie prędkości
średnia Speer
przejście dla pieszych
dodatkowy system oświetlenia
Opis:: The probability and severity of accidents at pedestrian crossings strongly depend on vehicles’ speed; hence, drivers’ speed control and awareness of driving conditions are very important. Lighting installations in the transition areas of pedestrian crossings have been set up in Polish cities in recent years to improve the visibility of pedestrian crossings and enhance drives’ awareness while approaching sensitive spots in the road network. A key study focus is to evaluate the influence of additional lighting systems on drivers’ behaviour in terms of travel speed. Drivers’ speed measures were carried out under daytime and nighttime conditions on single carriageways. Speed measurements were performed in free flow driving conditions in the vicinity of zebra crossins located in mid-block segments and at intersection inlets. The analyses conducted have shown an ambiguous influence of lighting installations on drivers’ behaviour. It has been found that drivers approaching pedestrian crossings with additional illumination systems decrease their speed significantly, but average speeds, even reduced, remain over posted speed limits. Moreover, at zebra locations, drivers’ speed under night conditions in some cases was found to be significantly higher than during the day. Based on the results obtained, some recommendations have been made to improve drives’ speed behaviour at pedestrian crosswalks.
Źródło:: Transport Problems; 2021, 16, 4; 35--43
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Zachowania kierowców pojazdów w otoczeniu środków uspokojenia ruchu w warunkach miejskich
Autorzy:: Ziółkowski, Robert
Macioszek, Elżbieta
Kempa, Jan
Powiązania:: https://bibliotekanauki.pl/books/2148173.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Opis:: Prędkość jazdy, z jaką mogą poruszać się kierowcy, jest podstawowym miernikiem oceny jakościowej infrastruktury drogowej. Pozostaje również dominującym czynnikiem sprawczym wypadków i kolizji drogowych, w związku z tym wymaga efektywnego zarządzania. W obszarach zabudowanych do najskuteczniejszych działań w tym zakresie należy wdrażanie rozwiązań polegających na uspokojeniu ruchu. Obecność fizycznych środków kontroli prędkości wpływa również na płynność jazdy i determinuje dynamiczne zachowania kierowców wyrażone intensywnością manewrów hamowania i przyspieszania, które nie były dotychczas szerzej analizowana w literaturze. W pracy przedstawiono wyniki badań i analiz prędkości oraz dynamicznych zachowań kierowców w rejonie oddziaływania najczęściej instalowanych inżynierskich środków uspokojenia ruchu: fotoradarów, rond z grupy mini i małych, progów zwalniających listwowych oraz progów zwalniających w postaci wyniesionych tarcz przejść dla pieszych i skrzyżowań.
Driving speed at which drivers can move is the most important parameter of the quality assessment of the existing road infrastructure. However, due to its connection with traffic safety, it requires effective control. In built-up areas, the most effective activities in this area include the implementation of solutions related to traffic calming. Among the wide range of available tools for control and speed regulation, the most commonly used are solutions from the group of physical measures of traffic calming. Due to high efficiency their presence also significantly disturbs the smoothness of driving and the size of these disturbances determine the style and dynamics of driving expressed by the intensity of braking and acceleration maneuvers in the area of the influence of engineering measures of traffic calming. The results of the conducted research allowed to determine the variability of the dynamic behavior of drivers in the area of the most commonly used traffic calming measures. The use of individual speed profiles allowed to determine the impact zones of individually installed traffic calming measures and to link the magnitude of dynamic changes with the speed generated by the presence of engineering measures of traffic calming. Speed tests conducted in the zones of linear traffic calming installations were the basis for the development of regression models linking the spacing of installed speed bumps with the basic speed parameters. Research on the dynamic behavior of drivers has not been undertaken so far in other national research and development centers in Poland. The obtained results and developed regression models can be an effective tool for planning traffic-calming solutions which will also take into account the minimization of negative environmental impact associated with intensive braking and acceleration maneuvers generated by the presence of traffic-calming measures.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: 1000 Liver Transplantations at the Department of General, Transplant and Liver Surgery, Medical University of Warsaw - Analysis of Indications and Results
Autorzy:: Krawczyk, Marek
Grąt, Michał
Barski, Krzysztof
Ligocka, Joanna
Antczak, Arkadiusz
Kornasiewicz, Oskar
Skalski, Michał
Patkowski, Waldemar
Nyckowski, Paweł
Zieniewicz, Krzysztof
Grzelak, Ireneusz
Pawlak, Jacek
Alsharabi, Abdulsalam
Wróblewski, Tadeusz
Paluszkiewicz, Rafał
Najnigier, Bogusław
Dudek, Krzysztof
Remiszewski, Piotr
Smoter, Piotr
Grodzicki, Mariusz
Korba, Michał
Kotulski, Marcin
Cieślak, Bartosz
Kalinowski, Piotr
Gierej, Piotr
Frączek, Mariusz
Rdzanek, Łukasz
Stankiewicz, Rafał
Kobryń, Konrad
Nazarewski, Łukasz
Leonowicz, Dorota
Urban-Lechowicz, Magdalena
Skwarek, Anna
Giercuszkiewicz, Dorota
Paczkowska, Agata
Piwowarska, Jolanta
Gelo, Remigiusz
Andruszkiewicz, Paweł
Brudkowska, Anna
Andrzejewska, Renata
Niewiński, Grzegorz
Kilińska, Beata
Zarzycka, Aleksandra
Nowak, Robert
Kosiński, Cezary
Korta, Teresa
Ołdakowska-Jedynak, Urszula
Sańko-Resmer, Joanna
Foroncewicz, Bartosz
Ziółkowski, Jacek
Mucha, Krzysztof
Senatorski, Grzegorz
Pączek, Leszek
Habior, Andrzej
Lechowicz, Robert
Polański, Sławomir
Leowska, Elżbieta
Pacho, Ryszard
Andrzejewska, Małgorzata
Rowiński, Olgierd
Kozieł, Sławomir
Żurakowski, Jerzy
Ziarkiewicz-Wróblewska, Bogna
Górnicka, Barbara
Hevelke, Piotr
Michałowicz, Bogdan
Karwowski, Andrzej
Szczerbań, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/1396689.pdf
Data publikacji:: 2012-06-01
Wydawca:: Index Copernicus International
Tematy:: liver transplantation
indications
results
mortality
Opis:: The aim of the study was to analyze indications and results of the first one thousand liver transplantations at Chair and Clinic of General, Transplantation and Liver Surgery, Medical University of Warsaw.Material and methods. Data from 1000 transplantations (944 patients) performed at Chair and Clinic of General, Transplantation and Liver Surgery between 1994 and 2011 were analyzed retrospectively. These included 943 first transplantations and 55 retransplantations and 2 re-retransplantations. Frequency of particular indications for first transplantation and retransplantations was established. Perioperative mortality was defined as death within 30 days after the transplantation. Kaplan-Meier survival analysis was used to estimate 5-year patient and graft survival.Results. The most common indications for first transplantation included: liver failure caused by hepatitis C infection (27.8%) and hepatitis B infection (18%) and alcoholic liver disease (17.7%). Early (< 6 months) and late (> 6 months) retransplantations were dominated by hepatic artery thrombosis (54.3%) and recurrence of the underlying disease (45%). Perioperative mortality rate was 8.9% for first transplantations and 34.5% for retransplantations. Five-year patient and graft survival rate was 74.3% and 71%, respectively, after first transplantations and 54.7% and 52.9%, respectively, after retransplantations.Conclusions. Development of liver transplantation program provided more than 1000 transplantations and excellent long-term results. Liver failure caused by hepatitis C and B infections remains the most common cause of liver transplantation and structure of other indications is consistent with European data.
Źródło:: Polish Journal of Surgery; 2012, 84, 6; 304-312
0032-373X
2299-2847
Pojawia się w:: Polish Journal of Surgery
Dostawca treści:: Biblioteka Nauki

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