Wszystkie pola: visibility - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Passing beam visibility distance - technical possibilities, legal requirements and road safety
Autorzy:: Targosiński, T.
Powiązania:: https://bibliotekanauki.pl/articles/247059.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: traffic safety
visibility
headlighting
Opis:: Night-time visibility is essential for road traffic safety. It depends mostly on quantity of light falling on the objects important to be seen to avoid collision. The relatively simple and easily understood criterion for quality of passing beam is visibility distance. In fact visibility distance of driver using headlamps is a much more complicated function of many factors such as design of headlamp, light source used, mounting height, aiming, change of beam pattern inclination during change of vehicle load. From point of view of legal requirements it is important to meet all requirements concerning all mentioned factors. But the problem is that there are separate legal requirements for light sources, headlighting systems and mounting conditions on vehicle. Final visibility distance is significantly influenced by coincidence of all this performances but also by visual possibilities of driver and road conditions. The process of requirements creation is complicated. A number of experts work on them for a long time. It is influenced by technical progress, market needs, level of knowledge and experience. . In this paper author describes influence of important factors for present state of possible and real visibility distances in dependence on technical design, kind of light source used and way of creation of type approval requirements and propose improved concept for aiming and levelling.
Źródło:: Journal of KONES; 2011, 18, 4; 511-517
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Global satellite navigation systems at high latitudes, visibility and geometry
Autorzy:: Januszewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/320934.pdf
Data publikacji:: 2016
Wydawca:: Polskie Forum Nawigacyjne
Tematy:: satellite navigation system
visibility of satellites
geometry of the system
Opis:: Since few years the significance of the navigation at high latitudes (60° and more), increases incessantly, e.g. northern passages between Atlantic and Pacific Waters. In these regions the user’s position can be obtained mainly from global satellite navigation systems (SNS). Nowadays (September 2016) two systems, American GPS and Russian GLONASS, are fully operational, two next, Galileo in Europe and BeiDou in China, are under construction. As the error of user’s position obtained from these systems depends on geometry factor DOP (Dilution Of Precision) among other things the knowledge of the number of satellites visible by this user above given masking elevation angle H_min and the distributions of DOP coefficient values, GDOP in particular, is very important. The lowest and the greatest number of satellites visible in open area by the user at high latitudes for different H_min, the percentage of satellites visible above angle H, distributions of satellites azimuths and GDOP coefficient values for different Hmin for all these four SNSs at different user’s latitudes (beginning from 60°) and other distributions are presented in the paper. All calculations were made for constellation of BeiDou 27 MEO satellites, Galileo 24 satellites, GLONASS 24 and GPS 31 satellites.
Od kilku lat znaczenie nawigacji na dużych szerokościach geograficznych (60° i wyższych) wzrasta nieprzerwanie, np. przejście północne łączące Atlantyk i Ocean Spokojny. W tych rejonach współrzędne użytkownika mogą zostać określone głównie za pomocą globalnych nawigacyjnych systemów satelitarnych (NSS). Obecnie (sierpień 2016) w pełni operacyjne są dwa systemy — amerykański GPS i rosyjski GLONASS, dwa kolejne są w budowie — Galileo w Europie i BeiDou w Chinach. Z uwagi na to, że błąd pozycji użytkownika określonej za pomocą tych systemów zależy również od współczynnika geometrycznego DOP, bardzo istotna jest znajomość liczby satelitów widocznych przez użytkownika powyżej przyjętej wysokości H_min oraz rozkładu współczynnika DOP, w szczególności GDOP. W artykule omówiono najmniejszą i największą liczbę satelitów widocznych powyżej danej H_min, procent satelitów widocznych powyżej danej H, procentowy rozkład azymutów satelitów oraz współczynnika GDOP na różnych szerokościach dla wszystkich czterech globalnych NSS. Obliczenia zostały zrealizowane przy założeniu, że system BeiDou liczy 27 satelitów, system Galileo 24 satelity, GLONASS 24 satelity, GPS zaś 31 satelitów.
Źródło:: Annual of Navigation; 2016, 23; 89-102
1640-8632
Pojawia się w:: Annual of Navigation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The retrofitting of trucks already being in use in Poland in a range of the indirect visibility
Autorzy:: Olejnik, K.
Powiązania:: https://bibliotekanauki.pl/articles/243921.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: safety
transport
visibility
Opis:: The paper discusses the need of additional equipment of trucks which are already being in use in Poland with the devices of the indirect visibility which enable to observe much bigger area in the neighbourhood of the vehicle. A large number of accidents are caused by drivers of larger vehicles who are not aware that other road users are very close to or beside their own vehicle. These accidents are often related to a change of direction at crossings, junctions or roundabouts, when drivers fail to detect other road users in the blind spots, which exist in the immediate area around their vehicles. The increase of the indirect visibility from the driver's seat improves safety of the participants in the road traffic. Over 400 people lost their life in the EU in of these accidents. Most of the victims of such accidents are pedestrians or two-wheelers, a particularly vulnerable category of road users. Implementation of the EU Directive 2003/97 (which is obligatory for the new vehicles) to the vehicles earlier registered can be done by replacement and installment of the new mirrors which contain bigger areas. This paper shows the results of the research on the independence of minimum dimensions (s, w) of mirrors class V and its placement on values of radius of curvature. It contains much bigger area than it is due to demands. Author also made a proposition on how to solve the problem of the limited visibility on the inclined crossing of roads and on enlarged crossing while turning left.
Źródło:: Journal of KONES; 2008, 15, 2; 357-364
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Ship Domain in Various Visibility Conditions in Restricted Waters
Autorzy:: Pietrzykowski, Z.
Siemianowicz, M.
Wielgosz, M.
Powiązania:: https://bibliotekanauki.pl/articles/320927.pdf
Data publikacji:: 2018
Wydawca:: Polskie Forum Nawigacyjne
Tematy:: navigational safety
restricted area
ship domain
visibility conditions
Opis:: Ship domain is one of navigational safety assessment criteria. Its shape and size depend on many factors, including visibility. This article examines the influence of visibility on the shape and dimensions of ship domain in restricted waters. The research was conducted using a simulator of the ECDIS system with the participation of experts’ navigators. The domains of ships in good and restricted visibility have been compared.
Domena statku jest jednym z nawigacyjnych kryteriów oceny bezpieczeństwa. Jej kształt i rozmiar zależą od wielu czynników, włączając widzialność. W artykule zreferowano badania nad wpływem widzialności na kształt i rozmiary domeny statku na wodach ograniczonych. Badania były prowadzone z użyciem symulatora systemu ECDIS z udziałem nawigatorów ekspertów. Przedstawiono porównanie domen statków w warunkach dobrej i ograniczonej widzialności.
Źródło:: Annual of Navigation; 2018, 25; 41-50
1640-8632
Pojawia się w:: Annual of Navigation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Infrared Sensor to Predict Atmospheric Visibility and Rainfall Rate
Autorzy:: Holejko, K.
Czarnecki, T.
Perlicki, K.
Powiązania:: https://bibliotekanauki.pl/articles/227162.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: light scattering
atmospheric visibility
rainfall rate
rain gauge
Opis:: The presented paper describes an instrument called Aurometer which was designed for both atmospheric visibility and rainfall rate measurement. The principle of operation of Aurometer is based on determining the amount of light scatteredby particles in the air that passes through the sample volume. The achieved results show that simultaneous estimation of the atmospheric visibility.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 2; 109-112
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The estimation of the increased limitation of the visibility in the light commercial vehicles
Autorzy:: Olejnik, K.
Powiązania:: https://bibliotekanauki.pl/articles/242969.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: maintenance
demands
visibility
construction of the car
Opis:: In the report there is discussed the problem of changing demands in the binding rules concerning the technical conditions. During maintenance, the lack of information from the surrounding of the vehicle is one of the reasons of collisions and accidents. There is a radical limitation of unobstructed observation of the whole area surrounding trucks of N1 category in comparison to the car of M1 category. Vehicles which have the same body and which are designed to transport people - M1 category or load – N1 category, they have different equipment, such as side glazing and back walls. Those who are driving these vehicles do not have comparable and identical visibility. The open loadcarrying body in the truck creates the screen obscuring of the big part of the vehicle's surrounding which precludes the direct observation of the considerable area. The devices of the indirect visibility enable to observe only the part of the area, which is directly invisible. There is an important need to change the regulation as far as construction and vehicles equipment is concerned. This paper offers the change of the philosophy of the regulations requirements in the area of visibility. Technical progress and development in the area of visual transfer devices helps to use them in the vehicles in order to improve the possibility of observing the surrounding of the vehicle. There is no reason to tolerate the worse visual transfer in the vehicles N1 category.
Źródło:: Journal of KONES; 2012, 19, 4; 513-518
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Visibility determination in beam tracing with application for real-time sound simulation
Autorzy:: Pałka, S.
Głut, B.
Ziółko, B.
Powiązania:: https://bibliotekanauki.pl/articles/305801.pdf
Data publikacji:: 2014
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: beam tracing
adaptive frustum
visibility determination
Opis:: This work presents some aspects of beam-tracing techniques used in sound simulation. The Adaptive Frustum algorithm, which was designed for detecting obstacles using beam subdivision, was reviewed for its efficiency as well as its accuracy. Some possible improvements have been suggested; however, they do not fully solve the problems of using this algorithm in real-time applications. Improved algorithm implementation was tested in five scenes with different characteristics and varying complexity.
Źródło:: Computer Science; 2014, 15 (2); 197-214
1508-2806
2300-7036
Pojawia się w:: Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Window of Visibility in the Display and Capture Process
Autorzy:: Xiong, F.
Zhai, G.
Zhang, Y.
Powiązania:: https://bibliotekanauki.pl/articles/227288.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: window of visibility
WoV
DLP
temporal psychovisual modulation
TPVM
Opis:: In normal conditions, the Critical Flicker Frequency is usually 60Hz. But in some special conditions, such as low spatial frequency and high contrast between frames, these special conditions have high probability to occur in some TPVM-based applications. So it’s extremely important to verify if a visual signal with a combination of temporal and spatial frequency can be recognize by human eyes. Based on the research in the last paper ’ ’Window of Visibility’ inspired security lighting system’, this paper introduces the measuring method of WoV of human eyes. In this paper we will measure critical flicker frequency in low spatial frequency and high contrast conditions, and we can witness a different conclusion from the normal conditions.
Źródło:: International Journal of Electronics and Telecommunications; 2018, 64, 3; 315-320
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Does the Artist Need to Be Present? The “Paradigm of Visibility” and Art Practices in Public Space
Autorzy:: Białkowski, Łukasz
Powiązania:: https://bibliotekanauki.pl/articles/665828.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:: Marina Abramović
visibility
public space
artworld
Opis:: The thesis of my paper is that art participatory practices in public space have a paradoxical potential to avoid a paradigm of visibility. What I call the paradigm of visibility is a formula of social presence of art which is based on a necessity of occupying a certain physical or symbolical space and an effort to sustain it. This kind of public presence of art is traditionally considered to be a guarantee of its value in terms of both artistic and social legitimisation. A question arises if this formula has an alternative. It seems that participatory art practices in public space – focused on production of objects and searching for social impact and social efficacy – can formulate a different model of presence of art (of its production and distribution) than object-based art.
Źródło:: Acta Universitatis Lodziensis. Folia Philosophica. Ethica – Aesthetica – Practica; 2017, 30; 111-119
0208-6107
2353-9631
Pojawia się w:: Acta Universitatis Lodziensis. Folia Philosophica. Ethica – Aesthetica – Practica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Filozoficzne aspekty widzialności
Philosophical Aspects of Visibility
Autorzy:: Stawowczyk, Edyta
Powiązania:: https://bibliotekanauki.pl/articles/466918.pdf
Data publikacji:: 2002
Wydawca:: Wydawnictwo Uniwersytetu Śląskiego
Opis:: Edyta Stawowczyk "Philosophical Aspects of Visibility" The development of new digital technologies has resulted in a cultural revolution unlike any other that has taken place so far. Digital interfaces make it possible to visualise hitherto unseen and unimaginable things and processes. The possibility of creating hitherto unseen and unimaginable images, of visualising events, of recording non-visual data and of the unlimited transformations connected with the binary form of recording data - all these make theorists of culture describe our times as the era of „driftingimages" or „visionics". The proliferation of images makes us reflect on the technoculturat conditions of seeing, and, in consequence, on the philosophical contexts of the new media images. Allthat contributes to the popularisation of the notion of visibility. Relying on Merleau-Ponty's phenomenology as well as on other philosophical conceptions (developed by Foucault, Virilio, Baudrillard and Bohm), the author seeks to describe the epistemological and ontological consequences of the media revolution.
Edyta Stawowczyk "Philosophical Aspects of Visibility" The development of new digital technologies has resulted in a cultural revolution unlike any other that has taken place so far. Digital interfaces make it possible to visualise hitherto unseen and unimaginable things and processes. The possibility of creating hitherto unseen and unimaginable images, of visualising events, of recording non-visual data and of the unlimited transformations connected with the binary form of recording data - all these make theorists of culture describe our times as the era of „driftingimages" or „visionics". The proliferation of images makes us reflect on the technoculturat conditions of seeing, and, in consequence, on the philosophical contexts of the new media images. Allthat contributes to the popularisation of the notion of visibility. Relying on Merleau-Ponty's phenomenology as well as on other philosophical conceptions (developed by Foucault, Virilio, Baudrillard and Bohm), the author seeks to describe the epistemological and ontological consequences of the media revolution.
Źródło:: ER(R)GO: Teoria – Literatura – Kultura; 2002, 5
1508-6305
2544-3186
Pojawia się w:: ER(R)GO: Teoria – Literatura – Kultura
Dostawca treści:: Biblioteka Nauki

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