Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Domański, Roman" wg kryterium: Autor


Wyświetlanie 1-7 z 7
Tytuł:
How to measure omnichannel? Marketing indicatorbased approach - theory fundamentals
Autorzy:
Domański, Roman
Powiązania:
https://bibliotekanauki.pl/articles/1835478.pdf
Data publikacji:
2021
Wydawca:
Wyższa Szkoła Logistyki
Tematy:
omnichannel
marketing mix
benchmarking
omnichannel indicators
systematic literature review
expert research
mix marketingowy
systematyczny przegląd literatury
badania eksperckie
Opis:
The ability to assess a situation is one of the key competences of companies operating on the market. One should know if one functions as well as their competitors, better or perhaps worse. In the case of the omnichannel concept, it is difficult to answer this question, since so far there has been no recognized standard for its evaluation. The aim of the article is to present the theory fundamentals of omnichannel measurement and evaluation in an indicator-based form. Methods: The theoretical part features a systematic literature review based on the Scopus abstract and citation database. In the research part, an original indicator-based omnichannel measurement and evaluation theory was presented. The idea was based on the following ideas: marketing mix, benchmarking, OTIFEF, AHP. Results: In the scientific literature, the dominant evaluation of omnichannel is based on financial measures, which, according to the author of this article, does not reflect the essence of the functioning of this concept. Therefore, the research part presents relational omnichannel indicators - individual (4) and aggregate (11) - based on non-financial measures. Conclusions: There are currently no reference omnichannel evaluation instruments. The creation and functioning of such a standard would allow to form objective opinions. The standardization of the omnichannel measurement would enable to perform comparative analyses, the results of which could be used to further improve trade and distribution processes in companies using this sales strategy. The research approach adopted in the article fits very well with the assumptions of the omnichannel concept. The proposed measurement and evaluation theory is simple and universal, and its application is not constrained by any limitations. It enables both individual and comparative evaluation.
Źródło:
LogForum; 2021, 17, 3; 373-385
1734-459X
Pojawia się w:
LogForum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of drones in mountain search and rescue (GOPR) in Poland – possibilities and limitations
Autorzy:
Domański, Roman
Powiązania:
https://bibliotekanauki.pl/articles/2134972.pdf
Data publikacji:
2022
Wydawca:
Wyższa Szkoła Logistyki
Tematy:
drones
unmanned aerial vehicle (UAV)
rescue
mountains
Polska
Mountain Volunteer Search and Rescue
GOPR
drony
bezzałogowy statek powietrzny
góry
Polska
Górskie Ochotnicze Pogotowie Ratunkowe
Opis:
Background: Distribution using drones is treated as a developmental and promising form of transport in the future - an innovative way of moving about. The literature review showed a lack of a comprehensive and holistic assessment of the phenomenon of the use of drones in mountain search and rescue in Poland, a research gap. The aim of the article is to perform a quantitative and qualitative assessment of this issue, acquiring new knowledge about the basics of phenomena and observable facts (cognitive aspect). Methods: The subject of the study are drones. The scope of the study covers only the mountain search and rescue in Poland. The entities under study are central branches of Mountain Volunteer Search and Rescue (GOPR). The study used the method of an in-depth direct interview carried out with mountain rescuers - drone pilots in GOPR. Results: The result of the analysis of the material from interviews is an assessment of the use of drones in search and rescue in Polish mountains: what drones are already used, in which mountain groups, how many are, how often they are used, what rescue tasks they perform, how many drone pilots there are, what competences they have, what opportunities and problems are associated with the operation of drones in mountainous terrain. Conclusions: Drones are already used in mountain search and rescue by GOPR – mainly for searching for people and monitoring avalanches. At the moment, the scale of the phenomenon is not very impressive. However, drones are treated as a developmental issue in GOPR. In addition to plans to increase the number of drones, GOPR is also considering the introduction of drones into other categories of rescue tasks as well as providing the current fleet with new additional equipment. The main barriers to further proliferation of drones in GOPR are legal, insurance, financial, and behavioral issues.
Źródło:
LogForum; 2022, 18, 3; 275--284
1734-459X
Pojawia się w:
LogForum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method for efficient feasibility study of air cooling systems for modern PMSM electric motors in all-electric aviation
Autorzy:
Kapuściński, Jakub
Domański, Roman
Powiązania:
https://bibliotekanauki.pl/articles/95265.pdf
Data publikacji:
2020
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
electric motor
air cooling
finned heat sink
silnik elektryczny
chłodzenie powietrza
Opis:
In this paper, the authors present a computational model of a fin-based air cooling system for Permanent Magnet Synchronous Machine (PMSM) electric motors. The model can be used as a method for fast and efficient feasibility studies of air cooling for PMSM motors in hybrid-electric or all-electric aviation applications, supplementing further research (thermal resistance networks, and FEA/CFD-CHT models). In the paper, authors provide temperature distributions along the fin height which are calculated and presented for a straight fin, followed by heat transfer rate from fin surface and fin efficiency. A parameter to compare different fin materials for aviation applications is introduced – heat transfer rate from the fin to fin mass ratio. Aluminum and copper fins are compared. Different shapes of straight fin are considered and compared. The above parameters and comparison are then calculated and given for circular fins. Parameters of the whole fin-based air cooling system for specific 140 kW PMSM motor are calculated and presented.
Źródło:
Journal of Mechanical and Energy Engineering; 2020, 4, 1; 89-96
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of non-Fourier thermal waves interaction in a solid material
Autorzy:
Lenarczyk, Marcin
Domański, Roman
Powiązania:
https://bibliotekanauki.pl/articles/240472.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
non-Fourier equation
heat waves
hyperbolic heat conduction
thermal wave interaction
fale cieplne
przewodzenie ciepła
Opis:
In this paper, effects of non-Fourier thermal wave interactions in a thin film have been investigated. The non-Fourier, hyperbolic heat conduction equation is solved, using finite difference method with an implicit scheme. Calculations have been carried out for three geometrical configurations with various film thicknesses. The boundary condition of a symmetrical temperature step-change on both sides has been used. Time history for the temperature distribution for each investigated case is presented. Processes of thermal wave propagation, temperature peak build-up and reverse wave front creation have been described. It has been shown that (i) significant temperature overshoot can appear in the film subjected to symmetric thermal load (which can be potentially dangerous for reallife application), and (ii) effect of temperature amplification decreases with increased film thickness.
Źródło:
Archives of Thermodynamics; 2019, 40, 1; 115-126
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relation between thermal conductivity and coordination number for fibre-reinforced composite with random distribution of fibres
Autorzy:
Darnowski, Piotr
Furmański, Piotr
Domański, Roman
Powiązania:
https://bibliotekanauki.pl/articles/240092.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fibre reinforced composite
random sequential addition
parallel fibres
coordination number
effective thermal conductivity
kompozyt włóknisty
efektywna przewodność cieplna
włókna równoległe
numer koordynacyjny
Opis:
Transverse effective thermal conductivity of the random unidirectional fibre-reinforced composite was studied. The geometry was circular with random patterns formed using random sequential addition method. Composite geometries for different volume fraction and fibre radii were generated and their effective thermal conductivities (ETC) were calculated. Influence of fibre-matrix conductivity ratio on composite ETC was investigated for high and low values. Patterns were described by a set of coordination numbers (CN) and correlations between ETC and CN were constructed. The correlations were compared with available formulae presented in literature. Additionally, symmetry of the conductivity tensor for the studied geometries of fibres was analysed.
Źródło:
Archives of Thermodynamics; 2019, 40, 1; 21-48
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the effect of diamond powder on the thermal properties of octadecane using differential scanning calorimetry
Autorzy:
Godlewski, Wojciech
Sierakowski, Mateusz
Domański, Roman
Kapuściński, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/242378.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
phase change materials
PCM
diamond powder
thermal conductivity
thermal diffusivity
Opis:
The purpose of this work was to examine the effect of diamond powder on the thermal properties of phase change materials on the example of octadecane. The experiment involved mixing of diamond powder with a specific granulation with the aforementioned representative of the alkanes group. Two different grain sizes were used: 50 and 250 micrometres. The change of specific heat, latent heat of phase change and degree of supercoiling in newly formed mixtures was compared to the pure forms of the phase-change materials used. Initial mixing with a glass-stirring rod showed strong stratification for each granulation due to the low viscosity of the mixture and too large differences between component densities. It was decided to add amorphous silicon dioxide to the mixtures, which increases density of the mixture. The optimal percentage of amorphous silicon dioxide was estimated experimentally. Measurements of thermal parameters were carried out using DSC technology. The results of the tests of specific heat and latent phase transition heat showed that with the increasing content of diamond, the specific heat of the mixture decreases almost twice, and the latent heat can decrease by up to three times. The effect of diamond powder on reducing the degree of supercoiling of the mixture was also observed. An important observation was that the mixture with higher granulation of diamond powder had greater tendency for sedimentation. This method could be used to increase thermal conductivity and diffusivity of phase change materials and make them viable for use in systems that require cooling at high rate or temperature stabilization, such as control systems in electronic vehicles or aviation industry and at the same time decrease the degree of supercoiling which could increase the efficiency of system.
Źródło:
Journal of KONES; 2019, 26, 3; 39-45
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of thermal properties of novel phase change material mixtures (octadecane-diamond) with laser flash analysis
Autorzy:
Sierakowski, Mateusz
Godlewski, Wojciech
Domański, Roman
Kapuściński, Jakub
Wiśniewski, Tomasz
Kubiś, Michał
Powiązania:
https://bibliotekanauki.pl/articles/246255.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
phase change materials
PCM
diamond powder
thermal conductivity
thermal diffusivity
Opis:
Phase change materials (PCMs) are widely used in numerous engineering fields because of their good heat storage properties and high latent heat of fusion. However, a big group of them has low thermal conductivity and diffusivity, which poses a problem when it comes to effective and relatively fast heat transfer and accumulation. Therefore, their use is limited to systems that do not need to be heated or cooled rapidly. That is why they are used as thermal energy storage systems in both large scale in power plants and smaller scale in residential facilities. Although, if PCMs are meant to play an important role in electronics cooling, heat dissipation, or temperature stabilization in places where the access to cooling water is limited, such as electric automotive industry or hybrid aviation, a number of modifications and improvements needs to be introduced. Investigation whether additional materials of better thermal properties will affect the thermal properties of PCM is therefore of a big interest. An example of such material is diamond powder, which is a popular additive used in abradants. Its thermal diffusivity and conductivity is significantly higher than for a pure PCM. The article presents the results of an analysis of the effect of diamond powder on thermal conductivity and diffusivity of phase change materials in the case of octadecane.
Źródło:
Journal of KONES; 2019, 26, 4; 211-218
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies