Temat: safe distance - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Odstęp bezpieczny – niedoceniany problem bezpieczeństwa ruchu drogowego
The safe distance – non-appreciated problem of road traffic safety
Autorzy:: Szczęsny, P.
Orlicz-Szczęsna, G.
Powiązania:: https://bibliotekanauki.pl/articles/250711.pdf
Data publikacji:: 2015
Wydawca:: Instytut Naukowo-Wydawniczy TTS
Tematy:: odstęp bezpieczny
bezpieczeństwo
ruch drogowy
safe distance
security
traffic
Opis:: W artykule omówiono problematykę odstępu bezpiecznego za pojazdem poprzedzającym. Problem ten jest w warunkach krajowych powszechnie niedoceniany, bagatelizowany, a nawet nieuświadamiany. Następstwem tego jest, wzrost liczby wypadków z powodu niezachowania odstępu bezpiecznego w ruchu drogowym. Przeprowadzono analizę parametryczną tej kategorii wypadków, pozwalającą stwierdzić czterokrotnie niższą ich ciężkość w odniesieniu do innych kategorii. Powodem tego jest fakt, iż dochodzi do nich głównie w ruchu miejskim, przy małej prędkości jazdy. Wyznaczono minimalną długość odstępu bezpiecznego od pojazdu poprzedzającego dla typowych prędkości jazdy w oparciu o model teoretyczny, a także uproszczoną zależność praktyczną.
The article discusses the issue of keeping safe distance from the preceding vehicle. The problem is currently underestimated, ignored or even not realised in our local reality. It results in the growth of the number of road accidents mentioned in the police records, because of the lack of the safe distance. A parameter analysis of this category of accidents has been accomplished, making it possible to state that their four times less serious compared to other categories. The reason for this is that they usually occur in town or city traffic at a small speed. The minimum safe distance from the preceding vehicle has been determined for the typical driving speed on the basis of a theoretical model and also simple practical dependence.
Źródło:: TTS Technika Transportu Szynowego; 2015, 12; 1479-1482, CD
1232-3829
2543-5728
Pojawia się w:: TTS Technika Transportu Szynowego
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of two-stage endo-atmospheric separation using statistical methods
Autorzy:: Samani, M.
Pourtakdoust, S. H.
Powiązania:: https://bibliotekanauki.pl/articles/280453.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: separation
safe distance
uncertainty
statistical methods
Monte Carlo simulation
Opis:: In this paper, selection and analysis of an atmospheric two stage separation system is di- scussed. The main purpose of this system is to test a supersonic parachute projectile, where a stage separation occurs after the burn out. Subsequently, the parachute is ejected from the payload after a minimum elapsed time. The separation times, for the supersonic parachute ejection, as well as the time needed for a safe clearing distance between the two stages are two critical issues in the separation process. In this respect, the knowledge of the relative position between the two stages is necessary to assure a safe distance and in order to ad- just the required system parameters. In addition, as the nature of the parameters involved in the separation process is not deterministic, it would be useful to utilize the concept of random variables in the dynamic modeling of the separation process. In this paper, the mo- deling and simulation of the separation process is initially performed and partially verified. Subsequently, an approximate statistical method is utilized to acquire some probabilistic in- formation about the relative distances at the two critical times. According to the simulation results, the relative distance between the two stages falls in a safe region. Finally, Monte Carlo simulation is also performed for comparison and verification of the statistical results that indicated a small and acceptable deviation between the two approaches. Thus, it can be concluded that the simpler approximate statistical approach is also valid for uncertainty analysis and can provide valuable knowledge needed in the preliminary design phase of the separation system.
Źródło:: Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 1115-1124
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Research on the Critical Sizes for Detonation of Cube-shaped Transfer Charges
Autorzy:: Zhao, Xiang-run
Jin, Shi-xin
Huang, Jin-hong
Li, Chao-zhen
Yan, Li-wei
Powiązania:: https://bibliotekanauki.pl/articles/358353.pdf
Data publikacji:: 2019
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: explosive train
transfer charge
shock wave sensitivity
minimum safe separation distance
Opis:: In order to obtain the minimum size, thickness and safe separation distance, for the cube-shaped transfer charges used in MEMS (micro-electromechanical system) explosive trains, an explosive train using a JO-9C(III) cube-shaped transfer charge was designed for experimental research. Detonation transfer experiments and detonation interruption experiments were conducted in turn. In initial experiments, the electric detonators were all in the armed position, but different thicknesses of the cube-shaped transfer charges were used. In the later experiments, the thickness of the transfer charges were unchanged, but the separation distances were different. The detonation path of the transfer charge under unsafe conditions was analyzed using the shock wave attenuation law. The results showed that the minimum thickness ranged from 0.2 mm to 0.4 mm, the minimum safe separation distance ranged from 0.4 mm to 0.6 mm; and the cube-shaped transfer charge is detonated by a shock wave from a steel gap rather than air clearance when the safe separation distance is less than the minimum threshold. The thickness design value of the cube-shaped transfer charge (JO-9C(III)) should not be less than 0.6 mm, and the safe separation distance design value of the MEMS explosive train should not be less than 1 mm.
Źródło:: Central European Journal of Energetic Materials; 2019, 16, 1; 91-104
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Legislation and road safety
Autorzy:: Majerová, Z.
Rievaj, V.
Powiązania:: https://bibliotekanauki.pl/articles/393569.pdf
Data publikacji:: 2013
Wydawca:: Polskie Stowarzyszenie Telematyki Transportu
Tematy:: traffic accident
driving safety
reaction time
vehicle
safe distance
legislation
wypadek drogowy
bezpieczeństwo ruchu drogowego
czas reakcji
pojazd
bezpieczna odległość
prawodawstwo
Opis:: Traffic accident statistics point out that the most dangerous fault of drivers is the fact of not adapting the speed of their vehicles. Many of them often do not realize the fact that it is necessary to comply with the allowed speed not only for their own travel safety but also because of other road users ability to respond to them. In this case the driving speed is an essential assumption to handle a situation not only in a populated urban area but also on the open road. The quality and condition of the road surface has a signifi cant impact on the driving safety. Drivers are oft en unaware of the fact that with increasing speed also their kinetic energy increases, which is converted into braking heat then and the braking distance of their vehicles gets longer. The text provides some model situations of these effects.
Źródło:: Archives of Transport System Telematics; 2013, 6, 1; 37-40
1899-8208
Pojawia się w:: Archives of Transport System Telematics
Dostawca treści:: Biblioteka Nauki

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