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Wyszukujesz frazę "inventory model" wg kryterium: Temat


Tytuł:
Reverse Logistics Inventory Model for Reusable Product Parts
Autorzy:
Jodejko-Pietruczuk, Anna
Plewa, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/503894.pdf
Data publikacji:
2012
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
reverse logistics
reusable product parts
inventory model
Opis:
Until recently logistics systems supported only processes carried out in classical material flow from producer to final user. Recently it has been a remarkable growth of interest in optimizing logistics processes that supports recapturing value from used goods. The process of planning, implementing, and controlling the efficient, cost effective flow of raw materials, in-process inventory, finished goods and related information from the point of consumption to the point of origin for the purpose of recapturing value or proper disposal is called reverse logistics. Reuse of product parts can bring direct advantages to the company because it reduces costs associated with acquiring new components. Main goal of this paper is to create the reverse logistics inventory model that uses the reliability theory to describe re-usability of product parts with assumption that recovered components are used in a production process but they aren’t as good as new ones. The model allows to estimate the potential profits of the reusing policy in production and inven-tory management. It gives the base to optimize some of the process parameters: the threshold work time of returns, the warranty period for products containing reused elements or new components order size.
Źródło:
Logistics and Transport; 2012, 14, 1; 111-118
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of demand boosting policy on optimal inventory policy for imperfect lot size with backorder in fuzzy environment
Autorzy:
Yadav, D.
Singh, S. R.
Kumari, R.
Powiązania:
https://bibliotekanauki.pl/articles/206244.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
learning curve
advertisement
signed distance
triangular fuzzy number
backorder
inventory model
Opis:
This paper investigates an Economic Order Quantity (EOQ) model with backorder by taking imprecise demand rate with dependence upon the frequency of advertisement. The formulated model also incorporates learning effects on percentage of defective items present in each lot. Due to imprecision in demand, the obtained profit function is fuzzy. To determine the optimal values, we determine the equivalent crisp profit function by applying the signed distance method. Optimal order quantity and backorder level are obtained by using algebraic method in place of differential calculus. A numerical example is used to study the behavior of the model with respect to different inventory parameters. All calculations are performed with MATLAB 7.4.
Źródło:
Control and Cybernetics; 2012, 41, 1; 191-212
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of Channel Profit for Deteriorating Items when Trade Credit Linked to Order Quantity
Autorzy:
Sanas, Yogita
Kawale, Sunil
Lahji, Abdul Aziz
Powiązania:
https://bibliotekanauki.pl/articles/1177859.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Deterioration
Integrated Inventory Model
Order Quantity Dependent Trade Credit
Time Dependent Demand
Opis:
In this article, an attempt is made to optimize the joint total profit per unit time of vendor – buyer supply chain system where vendor offers different trade credit depends on order quantity to the buyer. Here items in the inventory are deteriorates with constant rate and demand is a linear function of time. Vendor is establishing threshold for allowing trade credit comprehensively to ensure the greatest benefit for both players. By analyzing total channel profit function, we developed the optimal solution to provide buyer’s order quantity and replenishment time. Numerical examples and sensitivity analysis are given to illustrate the theoretical results, and some managerial insights are also obtained.
Źródło:
World Scientific News; 2018, 98; 100-114
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Integrated Inventory Model for Deteriorating Items under Cash Discount and Permissible Delay in Payments
Autorzy:
Sanas, Yogita
Kawale, Sunil
Aziz, Lahji Abdul
Powiązania:
https://bibliotekanauki.pl/articles/1046535.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cash discount
Integrated inventory model
deterioration
permissible delay in payments
quadratic demand
Opis:
Numerous studies have been undertaken to explain inventory models with different features. While findings from earlier studies have been conflicting, recent industrial-level studies indicate that multi features inventory models have a positive impact on business scenario. We propose an inventory model with integration of many real features like constant deterioration under cash discount scheme and permissible delay in payments. That is, we want to investigate the buyer’s optimal replenishment policy with quadratic demand under trade credit and cash discount to maximise joint total profit per unit time. Furthermore, numerical example and sensitivity analysis are presented to illustrate the results of the proposed model and to draw managerial insights.
Źródło:
World Scientific News; 2019, 136; 226-240
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of an EPQ model in an imprecise environment with defuzzification by the centroid method under inflation
Autorzy:
Arora, Ritu
Chauhan, Anand
Sharma, Renu
Singh, Anubhav Pratap
Powiązania:
https://bibliotekanauki.pl/articles/2175846.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fuzzy production inventory model
selling price dependent demand
inflation
triangular fuzzy number
trapezoidal fuzzy number
centroid method
Opis:
The awareness of making decisions in an imprecise environment has resulted in considering the inventory system under a fuzzy approach. The effects of uncertain demand have been finding increased application in many inventory systems. Uncertainty creates complicated situations for the manufacturer in making decisions. Markets have become more competitive as a result of technological advancements. The effect of inflation on the overall cost of the inventory system is useful in providing a tool for the analysis of inventory decisions. This study intended to estimate the effect of different fuzzy numbers on a manufacturer's annual joint expected total cost. The comparative study of this proposed model has been considered for two different fuzzy numbers with the defuzzification technique as the centroid method. The optimization technique has been used to minimize the producer’s joint expected total cost under the condition mentioned earlier, and the model is validated numerically.
Źródło:
Operations Research and Decisions; 2022, 32, 3; 32--48
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of stochastic production-inventory model for deteriorating items in a definite cycle using Hamilton-Jacobi-Bellman equation
Autorzy:
Hau, Bui Minh
Kim, Hwan-Seong
Long, Le Ngoc Bao
You, Sam-Sang
Powiązania:
https://bibliotekanauki.pl/articles/2203774.pdf
Data publikacji:
2022
Wydawca:
Wyższa Szkoła Logistyki
Tematy:
production inventory model
deteriorating items
stochastic optimal control
HJB equation
model zapasów produkcyjnych
elementy niszczące
optymalna kontrola stochastyczna
równanie HJB
Opis:
Background: Inventory control is essential for a manufacturer to achieve the desired profit in successful supply chain management. This paper deals with the production-inventory system under the decrease in production rate. The model includes three stages: before the decrease in production, after the decrease in production, and after a period of inventory shortage. Throughout the stages, the stochastic inventory model is always affected by random factors and the deterioration of inventory quality. Method: The article uses the economic order quantity (EOQ) framework to evaluate costs in the production-inventory model. To optimize the manufacturer’s profit with the stochastic factor, Hamilton-Jacobi-Bellman (HJB) equation is presented to find the production rate to make the inventory model to guarantee its intended goals in a determined cycle. Result: Analytical solutions are provided for optimization of the stochastic production-inventory model. Numerical experiments show that inventory level, production rate, and profit over time are based on the optimal initial value of the production rate. Conclusion: The manufacturer’s profit comes from the stages of importing raw materials, processing and producing, storing and supplying items. Finding the initial value of the production rate can make the inventory level and production rate to ensure their desired value and get the target profit within a specified time.
Źródło:
LogForum; 2022, 18, 4; 379--411
1734-459X
Pojawia się w:
LogForum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Free and Commercial Software in the Processing of Data Obtained from Non-Metric Cameras
Autorzy:
Kloc, Barbara
Mazur, Andrzej
Szumiło, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1839103.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
orthophotomap
3D model
photo processing
photogrammetric application
inventory
Opis:
The main goal of the work was an attempt to compare the free and commercial photogrammetry software for processing the pictures taken with a camera drone, a traditional digital camera and a smartphone. Due to a wide range of programs on the market, four were selected for comparison (Agisoft Metashape, DroneDeploy, VisualSfM, COLMAP). Their brief description was presented, and then the photos were processed in each of them. Three sets of photographs were used for the processing (part of a residential area, photos of a building, and photos of a tree trunk). As a result, the capabilities of the selected applications were presented on the basis of various input data. Not every program was able to deliver all the desired products. Moreover, they differ depending on the software. The commercial applications have more functionalities. On the other hand, the open-source solutions allow for the development of algorithms. Working in any environment had its own characteristics. The selected applications were compared on the basis of the processing and the results obtained. Due to many aspects of their evaluation, it turned out that the research topic was very extensive. Moreover, it was found that it is very difficult to make an objective statement of the tested programs, because the same program can be scored differently, depending on the user’s needs, capabilities and knowledge.
Źródło:
Journal of Ecological Engineering; 2021, 22, 2; 213-225
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimates and forecasts of forest biomass and carbon sequestration in North America and Australia: a forty-five year quest
Autorzy:
Botkin, D.B.
Ngugi, M.R.
Doley, D.
Powiązania:
https://bibliotekanauki.pl/articles/52742.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
estimation
forecast
forest biomass
forest modelling
forest inventory
biomass inventory
model validation
carbon sequestration
North America
Australia
Opis:
A half-century of forest inventory research involving statistically-valid fieldmeasurements (using statistically representative sample size and showing confidence limits) and well-validated forecasting methods are reviewed in this paper. Some current procedures overestimate global and large-scale forest biomass, carbonstorage, and carbon sequestering rates because they are based on statistically-invalid methods (errors in estimates are unavailable and unreported), or they fail to consider key dynamic characteristics of forests. It is sometimes assumed that old-growth forests can serve as fixed, steady-state storage of biomass and carbon for indefinitely long periods, but it is shown by both modelling and remote sensing that forests are dynamic systems, the state of which can change considerably over as shorta time as a decade. Forecasting methods show that maximum biomass and carbon storage in some important forest types occurs in mid-succession, not in old-growth. It is proposed, therefore, that realistic biomass and carbon storage estimates used for carbon credits and offsets be determined as the statistical mean minus the confidence interval and that practical carbon sequestering programs include specific timeframes, not indefinitely long periods of time.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2014, 57, 192
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Applicability of Photogrammetry in Building Façade
Autorzy:
Siewczyńska, Monika
Zioło, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/27314816.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
photogrammetry
building facades
3D model
point cloud
inventory
fotogrametria
fasada budynku
model 3D
Opis:
This article evaluates the accuracy of 3D models made from point clouds obtained from photogrammetry. Photographs were taken from ground level and using a drone, and data processing was performed in 3DF Zephyr. The models were compared with the actual dimensions of the buildings. Four different building objects with varying degrees of complexity were analysed. The aim of the research is to analyse the conditions for taking photographs and how they are transformed into a point cloud, and to see how and whether the complexity of the shape of the facade affects the accuracy of the 3D model made from the point cloud. The inaccuracy of the point cloud in the form of point spread for all analysed cases was 1.8±0.4 cm on average. The largest measurement error was found in the case of a multi-storey building. Despite the presented inaccuracies, it was considered advantageous to use the point cloud obtained through photogrammetry in the inventory. No difference was observed in the accuracy of the model depending on the complexity of the building. Recommendations were made regarding the conditions for taking photographs.
Źródło:
Civil and Environmental Engineering Reports; 2022, 32, 3; 182--206
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A process framework for implementing vmi on the demand side
Autorzy:
Reitner, K.
Wetzlinger, W.
Ortner, W.
Powiązania:
https://bibliotekanauki.pl/articles/409120.pdf
Data publikacji:
2012
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
Vendor Managed Inventory
procesy biznesowe
małe i średnie przedsiębiorstwa (MŚP)
vendor managed inventory
business processes
process reference model
Opis:
Constantly, increasing customer requirements and changing market conditions require companies to collaborate with supply chain partners. Therefore, supply chain concepts like Vendor Managed Inventory (VMI) are now applied in various industries. Although VMI has become well-known in recent years, only a few companies plan, optimize, coordinate and implement processes with partners of the supply chain. Especially small and medium enterprises (SMEs) do not coordinate business processes with their suppliers, because it is very difficult for SMEs to estimate the effects of the implementation of VMI on their business processes. This paper focuses on a framework for integrating such a supply chain concept into the business processes on the demand side. To support the VMI implementation a process reference model with best practice processes is needed. Therefore, an extended process reference model LogWIN-P_VMI was developed, which helps companies to estimate the effects of VMI on their business processes.
Źródło:
Research in Logistics & Production; 2012, 2, 1; 31-42
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Psychology Students Try on the Role of Educational Diagnosticians. Preliminary Studies
Autorzy:
Niemierko, Bolesław
Powiązania:
https://bibliotekanauki.pl/articles/430666.pdf
Data publikacji:
2016-09-01
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
educational diagnostics
educational diagnostician
learning model
ego state
Educational Diagnostician Inventory
Opis:
The aim of the studies was to ascertain how far psychology students are ready to learn the vocation of education assistants to children and youth. Four general ways of acquiring knowledge and skills - by assimilation, by doing, by discovering, and by impression - were distinguished and interpreted with regard to the students’ prospective employment in educational institutions. Learning by doing (model Beta) and by impression (model Delta) turned out to be more expressive in the student self-reports than learning by assimilation (model Alpha) and by discovering (model Gamma). A proof that the Nosal/Paluchowski typology of diagnosticians applies to psychology students was also in search. However, the pertinent Educational Diagnostician Inventory appeared satisfactorily valid only for those psychology sophomores who manifested the best-shaped attitudes towards educational diagnoses. They belonged mostly to concrete-objective (Proceduralist) and global-subjective (Intuitionist) attitude categories. Transactional analysis partly supported these findings of the survey.
Źródło:
Polish Psychological Bulletin; 2016, 47, 3; 311-317
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of Terrestrial Laser Scanning for the purposes of preparing technical documentation in BIM technology
Autorzy:
Uchański, Łukasz
Karsznia, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/390695.pdf
Data publikacji:
2018
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
Terrestrial Laser Scanning
BIM
inventory works
Laser Scanning
point cloud
3D model
Opis:
Building Information Modelling (BIM) is becoming an increasingly popular solution used both for investment and for reverse engineering aimed at restoring of the original documentation of existing facilities. The reconstruction of an object including its full design properties in an interactive 3D environment makes it possible to carry out structural (including SMH – structural health monitoring) and strength analyses, as well as to provide the effi cient facility management (setting out essential parameters and conducting necessary repairs). This paper aims to assess the laser scanning performed by using an advanced pulse data-capturing device for the development of complex BIM documentation in the Water Centre Laboratory of Warsaw University of Life Sciences – SGGW. Obtained point clouds have been used to build the model for the needs of reverse engineering. Moreover, the authors evaluated the possibility of using a particular type of laser scanner to develop and update complex BIM documentation in the process of facility management.
Źródło:
Budownictwo i Architektura; 2018, 17, 3; 189-199
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model kosztów dla odnawiania zapasów w systemie sS
Costs model for inventory replenishment in sS system
Autorzy:
Krzyżaniak, S.
Powiązania:
https://bibliotekanauki.pl/articles/321707.pdf
Data publikacji:
2014
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
odnawianie zapasów
model kosztów
system sS
system MIN-MAX
inventory replenishment
cost model
sS system
MIN-MAX system
Opis:
W artykule przedstawiono model służący obliczaniu kosztów związanych z odnawianiem i utrzymywaniem zapasu w systemie zamawiania sS. System ten (zwany także systemem MIN-MAX) opiera się na okresowym przeglądzie stanu zapasów, przy czym decyzja o złożeniu zamówienia zależy od tego, czy w chwili przeglądu dostępny zapas jest równy lub mniejszy od przyjętego poziomu decyzyjnego s. W takim przypadku składane jest zamówienie uzupełniające aktualny zapas do poziomu S. W przypadku przeciwnym (w chwili przeglądu zapas jest większy od poziomu s), odstępuje się od składania zamówienia. Przedstawiono wyniki dalszych prac nad modelem matematycznym tego systemu (określającym relacje pomiędzy parametrami sterującymi a poziomem obsługi) oraz – opierając się na tym modelu – określono model kosztów obejmujących koszty uzupełniania, utrzymania oraz braku zapasu, z uwzględnieniem ewentualnych dodatkowych kosztów wynikających z istniejących uwarunkowań realizacji systemu. Wyniki uzyskane na podstawie modelu porównano z wynikami badań symulacyjnych.
This paper presents a model for calculating costs related to replenishment and maintenance in the inventory ordering system sS. This system (also known as a MIN-MAX system) is based on periodical review of stock, but the decision whether to order or not depends on whether at the time of the review the available stock level is equal or lower than the adopted decision level s. If this is the case, an order is made to replenish the current stock to level S. If the opposite is the case (at the time of the review the stock level is higher than s), no order is made. The paper presents the results of more works on the mathematical model of this system (which specifies the relations between determining parameters and the service level) and – basing on this model – a cost model has been determined which includes the costs of replenishment, maintenance and a stock-out situation, taking into account possible additional costs arising from the existing conditions of the system implementation. The results obtained on the basis of this model were compared with the results of simulation research.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2014, 70; 243-259
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tworzenie chmur punktów obiektów architektonicznych metodami fotogrametrii naziemnej
Creating point clouds of architectural objects with terrestrial photogrammetry methods
Autorzy:
Szymański, Piotr
Zając, Marcin
Wojciechowska, Gabriela
Powiązania:
https://bibliotekanauki.pl/chapters/2193787.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fotogrametria
inwentaryzacja
zabytek
model 3D
architektura
photogrammetry
building inventory
heritage buildings
3D models
architecture
Opis:
Chmura punktów jest produktem zasadniczym, stanowiącym podstawę do dalszej obróbki oraz modelowania obiektu. Jej szczegółowość w znacznej mierze determinuje dokładność wykonanego na jej podstawie modelu pod względem metrycznym oraz estetycznym. W ciągu ostatnich kilku lat dużą popularność zyskał skaning laserowy. Pomimo szybkości pomiaru oraz dokładności technologia skaningu nie wyparła innych, bardziej klasycznych technik, tj. metody fotogrametrycznej czy pomiaru tachimetrycznego. W niniejszym opracowaniu przedstawiono tok postępowania przy tworzeniu chmury punktów modelu obiektu architektonicznego metodami fotogrametrii naziemnej na przykładzie fragmentu elewacji północnej katedry wrocławskiej. W pracy przedstawiono również porównanie chmury punktów uzyskane dwoma różnymi metodami: naziemnym skaningiem laserowym oraz metodami fotogrametrycznymi. Porównanie objęło właściwości poszczególnych chmur związane z ich dokładnością, czasochłonnością oraz orientacyjnymi kosztami pozyskania.
The point cloud is a product that forms the basis for further processing and modeling of the object. Its detail largely determines the accuracy of the model made on its basis, in metric and aesthetic terms. Laser scanning has been very popular in the last few years. Despite the high speed of measurement and accuracy, the scanning technology did not supplant other, more classic techniques, i.e. photogrammetric method or tacheometric measurement. This paper presents the course of proceedings in the creation of a point cloud of the architectural object model using photogrammetry with the example of a fragment of the north elevation of the Wrocław cathedral. The paper also presents a comparison of the point cloud obtained by two different methods: terrestrial laser scanning (TLS) and photogrammetric methods. The comparison includes the properties of individual clouds related to their accuracy, time-consumption and the approximate costs.
Źródło:
Dziedzictwo architektoniczne. Badania podstawowe i ich dokumentowanie; 119-134
9788374930437
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Base Metal Pricing Variation: A Contribution to a Conceptual Model for Nickel
Zmiany cen metali nieszlachetnych: przyczynek do budowy modelu koncepcyjnego cen niklu
Autorzy:
Stepan, John
Powiązania:
https://bibliotekanauki.pl/articles/529748.pdf
Data publikacji:
2015-12-31
Wydawca:
Wyższa Szkoła Bankowa we Wrocławiu
Tematy:
base metals
mineral resource commodity prices
available inventory
warehouse stock
price variation model
supply and demand
Opis:
This paper contributes to the discussion of Base Metal Pricing Variation by analysing Nickel data for the year 2007. 2007 was the culmination of a period of unprecedented Nickel price turbulence and the purpose of the analysis was to identify the most important factors which could have resulted in such significant variation. Based on this analysis a conceptual model was developed of Nickel pricing dynamics. This model is presented in the paper as it may prove useful in further research on price variation or for other mineral resource commodities.
Źródło:
Central and Eastern European Journal of Management and Economics (CEEJME); 2015, 4; 271-294
2353-9119
Pojawia się w:
Central and Eastern European Journal of Management and Economics (CEEJME)
Dostawca treści:
Biblioteka Nauki
Artykuł

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