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    Wyświetlanie 1-16 z 16
    Tytuł:
    Research on air pollutant emissions from transport sources in Pila
    Autorzy:
    Gorzelańczyk, Piotr
    Wojtasik, Maja
    Powiązania:
    https://bibliotekanauki.pl/articles/2134866.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    air pollution
    transport
    exhaust gas emissions
    transport source
    environmental protection
    smog
    internal combustion engines
    zanieczyszczenie powietrza
    emisja gazów spalinowych
    źródło transportu
    ochrona środowiska
    silniki spalinowe
    Opis:
    This article aims to examine the emission of pollutants utilising transport in different points of the city in question at two different intervals, then show whether the means of transport negatively affects the city through pollution. The study of air pollutant emissions from transport sources is a key aspect towards solving problems related to environmental pollution. A study on the measurements of selected PM10 and PM2.5 pollutants to be able to determine the quality of air from transport sources in Pila at different times of the year and with appropriate assumptions regarding the appropriate distance by the road is included in this article. This study analysed data on air pollutants and compared it with the results of the Chief Inspectorate for Environmental Protection. This made it possible to propose solutions for the development of the air condition in Pila.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2021, 111; 57--74
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mobility market transformation – how mobility as a service based on open source principles will impact the ecosystem
    Autorzy:
    Gambetta, Ralph
    Barić, Danijela
    Powiązania:
    https://bibliotekanauki.pl/articles/2141090.pdf
    Data publikacji:
    2020
    Wydawca:
    Fundacja Centrum Badań Socjologicznych
    Tematy:
    MaaS
    public transport
    open source
    digitalisation
    ticketing
    Opis:
    Following the growing world population and associated need for increased transportation, there is a growing interest in some aspects of transport such as sustainability, to reduce CO2 emissions and reach climate objectives. Modern urban living is rapidly changing with new technological innovations, one of which is the possibility to integrate different electronic “on demand” services into one single medium. Public transport users need innovative, multi-applicative, multi-functional, safe and secure ticketing systems, easy to use. Concept of Mobility as a Service (MaaS) as an integration of various forms of transport services into a single mobility service accessible on demand is a new way of thinking about public transport. This paper focuses on mobility market transformation with main question how Mobility as a Service based on open source principles will impact the ecosystem.
    Źródło:
    Journal of Sustainable Development of Transport and Logistics; 2020, 5, 2; 22-28
    2520-2979
    Pojawia się w:
    Journal of Sustainable Development of Transport and Logistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finansowanie regionalnych przewozów pasażerskich w Polsce w procesie integracji z rynkiem europejskim
    Financing of Regional Passenger Transport in Poland in the Process of Integration with European Market
    Autorzy:
    Grad, Bożena
    Ferensztajn-Galardos, Ewa
    Powiązania:
    https://bibliotekanauki.pl/articles/586890.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    Finansowanie transportu
    Przewozy pasażerskie
    Transport regionalny
    Źródła finansowania
    Passenger traffic
    Regional transport
    Source of financing
    Transport financing
    Opis:
    An important factor of regional market integration of passenger in Poland to the European market are issues related to transportation funding and shaping the development of this market in accordance with the requirements of the European Union. These issues concern, among other things, rationalization of public expenditure and to seek new solutions to funding the development of regional passenger market, ie private investment funds, EU funds, etc., also make better use of development policy instruments to improve the absorption of funds from European Union funds The subject of discussion is to discuss sources of financing regional passenger transport in Poland and analysis of the use of public and EU funds in the years 2004-2010 to shape the development of this market in the process of integration with the European market.
    Źródło:
    Studia Ekonomiczne; 2013, 143; 53-68
    2083-8611
    Pojawia się w:
    Studia Ekonomiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anisotropic turbulent viscosity and large-scale motive force in thermally driven turbulence at low Prandtl number
    Autorzy:
    Mizerski, K. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/38695701.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    thermal convection
    heat transport
    Rayleigh number
    Prandtl number
    random heat source
    Opis:
    The fully developed turbulent Boussinesq convection is known to form large-scale rolls, often termed the ‘large-scale circulation’ (LSC). It is an interesting question how such a large-scale flow is created, in particular in systems when the energy input occurs at small scales, when inverse cascade is required in order to transfer energy into the large-scale modes. Here, the small-scale driving is introduced through stochastic, randomly distributed heat source (say radiational). The mean flow equations are derived by means of simplified renormalization group technique, which can be termed a ‘weakly nonlinear renormalization procedure’ based on consideration of only the leading order terms at each step of the recursion procedure, as full renormalization in the studied anisotropic case turns out unattainable. The effective, anisotropic viscosity is obtained and it is shown that the inverse energy cascade occurs via an effective ‘motive force’ which takes the form of transient negative, vertical diffusion.
    Źródło:
    Archives of Mechanics; 2022, 74, 5; 409-436
    0373-2029
    Pojawia się w:
    Archives of Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low Frequency Electromagnetic Interferences Impact on Transport Security Systems Used in Wide Transport Areas
    Autorzy:
    Dziula, P.
    Pas, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/116657.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    transport security system
    low frequency
    wide transport area
    electromagnetic Interferences
    durability
    vulnerability
    transport telematics
    diagnostics of interferences source
    Opis:
    The article presents the impact of electromagnetic interferences of low frequency range, on transport security systems used in wide transport areas. Intended and unintended (stationary and mobile), electromagnetic interferences, impacting on items and components constituting transport system at wide area (seaport, railway, etc.), cause changes of its vulnerability, resistance and durability. Diagnostics of interferences sources (amplitude, frequency range, radiation characteristics, etc.), appearing within transport environment, and usage of appropriate technical solutions of systems (i.e. shielding, reliability structures), allows for safe implementation of safety surveillance of human beings, properties and communication means.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 2; 251-258
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nowoczesna koncepcja rozwoju transportu trolejbusowego : projekt Slide-ln
    The modern concept of development of trolleybus transport : Slide-In project
    Autorzy:
    Bartłomiejczyk, M.
    Połom, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/312214.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    transport trolejbusowy
    alternatywne źródła zasilania
    bateria trakcyjna
    autobusy elektryczne
    trolleybus transport
    alternative power source
    traction batteries
    Opis:
    Ewolucja komunikacji trolejbusowej dotyczy wielu europejskich miast. Wraz z rozwojem alternatywnych źródeł zasilania (baterie trakcyjne, supekondensatory, spalinowe agregaty prądotwórcze) trolejbusy stają się mniej uzależnione od sieci trakcyjnej, a przy tym bardziej efektywne ekonomicznie. Jednoczesny rozwój autobusów elektrycznych i związane z nimi problemy eksploatacyjne skłaniają do refleksji nad ponownym rozważaniem zalet trolejbusów i elektrobusów. W artykule przedstawiono szwedzkie doświadczenia we wprowadzaniu nowoczesnych rozwiązań z pogranicza komunikacji trolejbusowej i autobusów elektrycznych.
    Evolution of the trolleybus transport occurs in many European cities. With the development of alternative sources of power (traction batteries, supercapacitors, diesel electric generators) trolleybuses become less dependent on the overhead line, and with the more cost-effective. Simultaneous development of electric buses and their associated operational problems tend to reflect on the use of the advantages of trolleybuses and electric buses making the solution more perfect. The article presents the Swedish experience in implementing innovative solutions on the border of trolleybuses and electric buses.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2015, 16, 7-8; 32-35
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical model development for non-point source in-stream pollutant transport
    Autorzy:
    Adu, Joy
    Kumarasamy, Muthukrishna Vellaisamy
    Powiązania:
    https://bibliotekanauki.pl/articles/205003.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-point source pollution
    hybrid cells in series
    pollutant transport
    instream flow
    pollutant concentration
    Opis:
    Non-point source pollution is a primary cause for concern globally. Various models have been developed to tackle this situation with much emphasis placed on best management practices. This practice has, however, proven to be insufficient to solve the NPS pollution situation. Existing non-point source models are watershed- -based and complicated both in operation, parameter estimation and data requirements. A non-point source model is proposed using the concept of the Hybrid Cells in Series model. The model is a three-parameter model made up of three zones, which describes pure advection through time delay in a plug zone, with combined advection and dispersion occurring when the other two zones are considered as thoroughly mixed. The proposed model is tested using synthetic data and field data from the Snake River, Colorado, USA, obtained from literature. Simulations were performed at four sample points; two from the tracer injection point along the Snake River before a confluence and two further downstream after the confluence. A regression analysis was carried out to determine the model’s capability to simulate pollutant transport for the four sampling points. The coefficients of determination are 0.98, 0.94, 0.84 and 0.97 while the standard error for each reach is 2.28E-2, 2.70E-2, 2.32E-2 and 9.35E-3 respectively. The results show good agreement between the measured and the simulated data. The response of the C-t profiles produced by the proposed model for both synthetic and field data demonstrates its ability to effectively simulate pollutant transport in natural rivers subject to non-point source pollution.
    Źródło:
    Archives of Environmental Protection; 2020, 46, 2; 91-99
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Status of the Warsaw ECR ion source and injection line
    Autorzy:
    Sudlitz, K.
    Kulczycka, E.
    Filipiak, B.
    Górecki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/148684.pdf
    Data publikacji:
    2003
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    axial injection
    Electron Cyclotron Resonance (ECR)
    highly charged ions
    implantation
    ion source
    ion transport
    Opis:
    A room temperature home built 10 GHz ECR ion source delivers beams of B, C, N, O, F, Ne, S, Ar to the Cyclotron U200-P. The same ion source has also been used for surface irradiation of the solids. To upgrade the ion source and increase the ion current in the cyclotron an oven for evaporation of solid materials has been constructed and a two gap buncher has been installed in the injection line. Some new observations on the influence of the extraction system on the ion beam current will be presented.
    Źródło:
    Nukleonika; 2003, 48,suppl.2; 105-108
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sediment transport and water quality in Machovo Lake [Czech Republic]
    Transport sedymentu i jakosc wody w Jeziorze Mahovo [Republika Czeska]
    Autorzy:
    Dostal, T
    Krasa, J.
    Vrana, K.
    Dockal, M.
    Koudelka, P.
    David, V.
    Vokurka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/81797.pdf
    Data publikacji:
    2010
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    sediment transport
    water quality
    sediment load
    phosphorus
    soil erosion
    pollution source
    Lake Machovo
    Czech Republic
    Opis:
    Máchovo Lake is a historical reservoir founded by Czech King Charles IV. in 14th century. Located in northern part of central Bohemia it has been widely used for recreation purposes for many decades (or even centuries). Its catchments (ca 100 sq km) consist of intensively used agricultural land (ca 25% of area) and of large forested area under nature protection. Several other lakes (ponds) are chained on the two reservoir’s inlets. Irrespective of its great recreation potential Máchovo Lake is one of the Bohemian lakes known for its problems with eutrophication and water quality. The project was set up to point out sources of nutrients and to search for proper solutions. Sediment loads in every lake within the catchments were measured and sampled in order to quantify the nutrients and other pollution. Point and non point sources of phosphorus and other nutrients were searched. Sediment transport within catchments was modelled using WaTEM/SEDEM model. Interestingly, the water quality in the particular ponds varies signifi cantly even though each one of several hundred years old ponds is heavily silted. Soil erosion protection measures within catchments were proposed altogether with flood protection measures in the stream valleys and waste water treatment facilities in surrounding villages. Setting up water quality sampling devices in selected stream profi les was tested and designed. The continual proper management should lead to water quality improvement.
    Położone w północnych Czechach Jezioro Máchovo jest zbiornikiem dla celów rekreacyjnych zbudowanym w XIV wieku przez czeskiego króla Karola IV. Jego zlewnia o powierzchni 100 km2 jest w 25% intensywnie użytkowana rolniczo, a pozostały zalesiony obszar podlega ochronie. Jakość wody i eutrofizacja wód jeziora oraz towarzyszących mu silnie zamulonych stawów stanowi poważny problem ekologiczny. Celem badań było określenie punktowych i powierzchniowych źródeł dostawy składników pokarmowych i rozwiązanie tego problemu. Do oceny dostawy sedymentu zastosowano WaTEM/SEDEM model. Została zaproponowana przeciwpowodziowa i przeciwerozyjna ochrona gleby przed erozją oraz gospodarka ściekami w obrębie zlewni. Działania te powinny doprowadzić do polepszenia jakości wody.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 139-148
    0208-5771
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finansowanie dróg lokalnych na przykładzie gminy Kołbaskowo
    Funding Local Roads on the Example of Kołbaskowo Commune
    Autorzy:
    Kwarciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/319789.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    transport samochodowy
    infrastruktura transportu samochodowego
    źródła finansowania
    drogi lokalne
    gmina Kołbaskowo
    road transport infrastructure
    source of financing local roads
    Kołbaskowo commune
    Opis:
    [...]Celem artykułu jest przedstawienie głównych źródeł finansowania infrastruktury transportu samochodowego na poziomie lokalnym na przykładzie jednej z gmin wiejskich województwa zachodniopomorskiego. Analiza porównawcza została przeprowadzona na podstawie informacji zawartych w sprawozdaniach budżetowych dla lat 2010-2014.[...]
    The basic transport network, which serves the transport needs of rural residents consists of municipal and county roads. It should be noted, however, that from the point of view of traffic density, despite their dominant share in the structure of roads in Poland, they are not too intensively used. For comparison, national roads, which in Poland are about 5 % of all roads, serve the vast majority of transportation needs. Highlighting the main sources of financing of road transport infrastructure in Poland, it is worth noting the expenses incurred for this purpose by the local (municipalities and counties), provincial governments and state. Expenditures incurred on road transport infrastructure may be of a current character linked with the maintenance of transport infrastructure and property (investment) associated with the modernization and construction of new road sections . Financing infrastructure of local roads (by the local governments and the counties) is commonly associated with its modernization. The development of municipal and county road network is also implemented by the provincial governments with the support of the Regional Operational Programmes and their own resources. Another source of financing the development of local roads in Poland is the state. An example can be the implemented, since 2008, the National Program of reconstruction of local roads. The essence of the program is the improvement of safety on local roads and a better connection to the national and provincial roads.
    Źródło:
    Zeszyty Naukowe. Problemy Transportu i Logistyki / Uniwersytet Szczeciński; 2014, 28; 143-160
    1640-6818
    Pojawia się w:
    Zeszyty Naukowe. Problemy Transportu i Logistyki / Uniwersytet Szczeciński
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental verification of the concept of the use of controlled pyrotechnic reaction as a source of energy as a part of the transport system from the seabed
    Autorzy:
    Filipek, W.
    Broda, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/135689.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    deep sea mining
    transport from the sea floor
    blasting materials
    pyrotechnics
    experimental verification
    source of Energy
    Opis:
    In this article the authors discuss the concept of using pyrotechnical materials for transportation in deep sea environment. The use of pyrotechnical materials in underwater transportation involves their use as a source of energy (needed, for instance, in emptying the ballast tank). The authors presented the experimental verification of the usefulness of pyrotechnical materials in transporting from great depth. In the experiments, a modified composition black powder was used as source of energy. In the research the authors focused on two methods of controlling the pyrotechnical reaction effects, i.e., mechanical suppression of the blast, so as to reduce its negative effect on the housing of the transporter, and control of the pyrotechnical reaction itself. The obtained results confirm the possibility of using pyrotechnical materials in transportation of deposits from considerable depth.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 49 (121); 77-83
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Environmentally Sustainable Transport Planning in the First and Last Mile Section of the Supply Chain
    Autorzy:
    Sierpiński, Grzegorz
    Staniek, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/504333.pdf
    Data publikacji:
    2019
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    eco-friendly supply chains
    freight transport planning
    ICT systems in logistic
    sustainable development
    open data source
    Opis:
    Background: The article provides a discussion on freight transport planning. The existing solutions applied in this sphere have been compared with the environment-related needs. The concept which has been proposed involves a dedicated travel planner that takes some additional non-standard criteria into consideration. At the same time, the authors have highlighted the necessity to expand the algorithms being applied, and to address the comprehensive nature of the problem. However, it is the first and last mile section of supply chains on which the article focuses. The planner described in the paper is being developed as a part of an integrated platform implemented under the international S-mile project. Research methodology: The solutions proposed for transport planning purposes include application of ICT. A review of the available solutions has made it possible to indicate one of the planners currently in use as the foundation upon which a more advanced freight transport planning tool dedicated to the first/last mile section can be built. The planner requires application of several optimisation algorithms, including those which consider route parameters, the selection of fleet vehicles available for the given task, cargo distribution over the vehicle etc. The article defines both primary and secondary criteria that such a planner should take into account, including the environmental ones. What the authors have also highlighted is the possibility to make use of open data sources. The approach they have proposed makes it possible to raise the level of environmental awareness at the first and the last mile management stage, and since multiple transport aspects have been addressed, it also increases planning efficiency. Goals: The purpose of the article has been to discuss an eco-friendly solution which may limit the negative environmental impact of transport. Conclusions: The solution described in the paper may change the manner in which freight transport is managed in cities. Taking environmental criteria into consideration makes it possible to reduce the negative environmental impact of transport. Planning of freight transport requires that far more criteria should be taken into account compared to route planning for the travelling population. A comprehensive fleet management platform featuring a planning module combined with other modules of the S-mileSys system being currently developed is also aimed at integration of large freight companies with the carriers that service first and last miles.
    Źródło:
    Logistics and Transport; 2019, 42, 2; 83-92
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of internal sources of hazards in civil air operations.
    Autorzy:
    Chruzik, K
    Wiśniewska, K.
    Fellner, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/198081.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    air traffic safety
    risk management
    risk analysis
    source of hazard
    air transport
    airport
    bezpieczeństwo ruchu lotniczego
    zarządzanie ryzykiem
    analiza ryzyka
    źródło zagrożenia
    transport lotniczy
    port lotniczy
    Opis:
    International air law imposes an obligation on the part of transport operators to operationalize risk management, and hence develop records of hazards and estimate the level of risk in the respective organization. Air transport is a complex system combining advanced technical systems, operators and procedures. Sources of hazards occur in all of these closely related and mutually interacting areas, which operate in highly dispersed spaces with a short time horizon. A highly important element of risk management is therefore to identify sources of danger, not only in terms of their own internal risks (the source of threats and activation of threats within the same transport organization), but also in the area of common risk (sources of threats beyond the transport system to which the activation of the hazard is related) and external risks (sources of threats outside the transport system). The overall risk management of a transport organization should consider all three risk areas. The paper presents an analysis of internal sources of threats to civil air operations and the resulting main risk areas. The article complements a previous paper by the same authors entitled “Analysis of external sources of hazards in civil air operations”.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2017, 94; 27-35
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rapid NEGF-based calculation of ballistic current in ultra-short DG MOSFETs for circuit simulation
    Autorzy:
    Hosenfeld, F.
    Horst, F..
    Graef, M.
    Farokhnejad, A.
    Kloes, A.
    Iniguez, B.
    Lime, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/397995.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    ultra-short Double-Gate MOSFET
    nonequilibrium Green's function
    NEGF
    ballistic transport
    source-to-drain tunneling
    ultra-thin body
    UTB
    compact model
    multi-scale simulation
    nierównowagowe funkcje Greena
    transport balistyczny
    tunelowanie źródło-dren
    model kompaktowy
    symulacja wieloskalowa
    Opis:
    Shrinking gate length in conventional MOSFETs leads to increasing short channel effects like source-to-drain (SD) tunneling. Compact modeling designers are challenged to model these quantum mechanical effects. The complexity lies in the set-up between time efficiency, physical model relation and analytical equations. Multi-scale simulation bridges the gap between compact models, its fast and efficient calculation of the device terminal voltages, and numerical device models which consider the effects of nanoscale devices. These numerical models iterate between Poisson- and Schroedinger equation which significantly slows down the simulation performance. The physicsbased consideration of quantum effects like the SD tunneling makes the non-equilibrium Green’s function (NEGF) to a stateof-the-art method for the simulation of devices in the sub 10 nm region. This work introduces a semi-analytical NEGF model for ultra-short DG MOSFETs. Applying the closed-form potential solution of a classical compact model, the model turns the NEGF from an iterative numerical solution into a straightforward calculation. The applied mathematical approximations speed up the calculation time of the 1D NEGF. The model results for the ballistic channel current in DG-MOSFETs are compared with numerical NanoMOS TCAD [1] simulation data. Shown is the accurate potential calculation as well as the good agreement of the current characteristic for temperatures down to 75 K for channel lengths from 6 nm to 20 nm and channel thickness from 1.5 nm to 3 nm.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2016, 7, 2; 65-72
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eksploatacja transportowych systemów nadzoru na rozległym obszarze kolejowym
    Exploitation of transport security systems on a vast railway area
    Autorzy:
    Paś, J.
    Dyduch, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/211190.pdf
    Data publikacji:
    2010
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    transportowy system nadzoru
    zakłócenie elektromagnetyczne, techniczny
    techniczny system ochrony
    diagnozowanie
    obiekt złożony
    system sygnalizacji włamania i napadu
    transport supervisory systems
    source of electromagnetic disturbances
    technical security system
    diagnosing
    complex objects
    system of signalization of burglary and assault
    Opis:
    W artykule przedstawiono wpływ środowiska elektromagnetycznego istniejącego w rozległym obszarze kolejowym na eksploatację transportowych systemów nadzoru. Wytwarzane przez pojazdy trakcyjne, trakcję zasilającą, podstacje elektroenergetyczne, linie zasilające, stacje transformatorowe, itd. zakłócenia elektromagnetyczne mogą być przyczyną zakłócenia procesu eksploatacyjnego systemu nadzoru. Wraz z rozwojem elektroniki następuje coraz większa miniaturyzacja urządzeń wchodzących w skład transportowych systemów nadzoru, do których można zaliczyć mikroprocesorowe czujki, centrale alarmowe, moduły mocy, itd. Stosowane w nich elementy i układy elektroniczne wymagają mniejszych napięć zasilania i pracują przy zmniejszonym poborze prądu. Dzięki temu pola elektromagnetyczne o mniejszej energii mogą łatwiej zakłócić pracę systemów nadzoru lub nawet spowodować ich uszkodzenie.
    The development of electronics results in miniaturization of devices being a part of transport security systems that include microprocessor sensors, alarm central unity, power modules, etc. Elements and electronic unity applied require lower voltage of power supply and work at decreased current. Thus, electromagnetic field of lower energy may more easily disturb the work of security systems or even may cause their damage. The main task of security systems installed in objects is detection of emergencies, informing about them and, if it is possible, initializing respective countermeasures. Security systems used in buildings require diagnosing to identify their technical and functional condition. Security systems are complex objects, because they realize many functions, e.g., supervising object, auto-diagnosing of system's elements (sensors, cameras, power-supply lines, input/output devices, reserve power suppliers, etc.), alarming about emergency, initializing anti-destructive actions. Such systems are usually equipped with self-monitoring circuits, i.e., circuits responsible for monitoring of technical state of security systems themselves. This monitoring consists in permanent supervising of the elements of the system (sensors, elements of the alarm central unit, cameras, monitors, optical signalizations, etc.). Source of electromagnetic disturbances may generate disturbances that can be the cause of increased probability of false alarms in transport supervisory systems.
    Źródło:
    Biuletyn Wojskowej Akademii Technicznej; 2010, 59, 4; 197-208
    1234-5865
    Pojawia się w:
    Biuletyn Wojskowej Akademii Technicznej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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