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Wyświetlanie 1-15 z 49
Tytuł:
Spectrofluorometric characterization of oil from pyrolysis of scrap tires
Autorzy:
Ambrosewicz-Walacik, M.
Piętak, A.
Powiązania:
https://bibliotekanauki.pl/articles/950184.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fuels
used car tires
pyrolysis
fluorescence
Opis:
Almost all kinds of fuel applied in combustion engines come from refining industry, in which crude oil serves as basic raw material. However, there are also searched other sources of hydrocarbons which can be used directly or as additives to conventional fuels. The most popular in this regard are vegetable oils such as rapeseed oil, from which are produced esters used as fuel for diesel engines. On the other hand, as additives to gasoline can be used alcohols derived from the fermentation of agricultural products. Another way to obtain liquid hydrocarbons is pyrolysis of scrap tires. In this article, such pyrolytic product is analysed in terms of its fluorescence properties compared to the fluorescent properties of substances derived from the distillation of the pyrolysis product in three following temperatures: 160, 204 and 350 ºC. All the tested substances show relatively strong fluorescence in ultraviolet range. Fluorometric spectra were performed applying the spectrofluorometer Hitachi F-7000 FL with 1x1 cm quartz cuvette. Studied substances were previously diluted in n-hexane to obtain concentration 4 ppm. Amount of fluorescent peaks and their positions depends on kind of distillate. Ipso facto fluorescence method seems be suitable much more – than chemical analyse – for quick identification of substances constituting a components of distillate obtained from pyrolytic product.
Źródło:
Journal of KONES; 2016, 23, 1; 25-30
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Material recycling of tyres by wather jet method
Autorzy:
Holka, H.
Jarzyna, T.
Matuszewski, M.
Musiał, J.
Powiązania:
https://bibliotekanauki.pl/articles/100157.pdf
Data publikacji:
2013
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
recycling
water jet method
used tyres
Opis:
In this article there has been presented an innovative method of tire material recycling with the use of water jet technology including calculation of mass balance of the jetted water, velocity of the water flowing out of a nozzle, demand for power to drive the pump, or the energy consumption unit indicator. Moreover, an analysis of the dynamic impact of water jet on the tire has been made. Successive stages of the research, performed by the authors in order to develop the final model and construct the machine for tire recycling, have been described. In the final section of the paper there are calculation results and conclusions.
Źródło:
Journal of Machine Engineering; 2013, 13, 2; 92-102
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The import of used cars to Poland after EU accession
Autorzy:
Kołsut, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/1015972.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
cars
European Union
import
Polska
used cars
Opis:
The purpose of the article is to identify the volume and spatial structure of imports of used cars to Poland during the first 15 years of membership in the European Union, using data from the Central Re gister of Vehicles. The article attempts to answer three key research questions: (1) What was the volume of imports of used cars to Poland in the period 2004–2018 against the background of the volume of imports into other selected countries and in relation to the level of sales of new cars? (2) From where (which countries) to where (which regions of Poland) were used cars imported? (3) How does the import of used cars affect the age structure of passenger cars in Poland? The conclusions of the study are as follows. In the period 2004–2018, nearly 12 million used cars were imported to Poland, which makes Poland the world leader in this field. The changes in the volume of imports were mainly influenced by the economic slowdown and lowering of consumers’ income levels, vehicle scrapping programs in Western Europe (which reduced the supply of older cars in these countries) and the value of the zloty against the euro. Most cars were imported from Germany, and the main gateways for imported cars were the so-called “car crescent”, located mainly in the Wielkopolska region. The average age of imported cars varied from around 8.5 to around 11 years and increased the average age of cars in Poland.
Źródło:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego; 2020, 34, 2; 129-143
2080-1653
Pojawia się w:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System for the management of waste batteries and accumulators in Poland
Autorzy:
Brzeszczak, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1062868.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
dangerous waste
used batteries and batteries
waste management system
Opis:
Waste is a serious threat to the environment and calling for waste management. This work focuses primarily on the characteristics of waste and the recycling of waste batteries and accumulators and their impact on the environment. An important aspect of limiting the negative impact of waste batteries and accumulators on the environment is their proper management, therefore the study focuses on the presentation of the system for the management of waste batteries and accumulators in Poland.
Źródło:
World Scientific News; 2019, 127, 3; 272-283
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectrofluorimetry of chosen distillates of oil after pyrolysis of scrap tires
Autorzy:
Otremba, Z.
Ambrosewicz-Walacik, M.
Powiązania:
https://bibliotekanauki.pl/articles/245271.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fuels
used car tires
pyrolysis
fluorescence
excitation-emission spectra
Opis:
One of way to obtain liquid hydrocarbons can be pyrolysis of scrap tires. The hydrocarbon substances produced by this method may be an addition to traditional fuels, i.e. gasolines or fuels for diesel engines. In laboratory conditions at Department of Mechatronics of University of Warmia and Mazury there were obtained pyrolytic products and prepared three distillates related to temperatures 160, 204 and 350ºC. Analyses of shapes of fluorescence spectra were carried out in Department of Physics of Gdynia Maritime University. Spectra of fluorescence were prepared applying the spectrofluorimeter Hitachi F-7000 FL, which allows applying of excitation wavelength from 200 nm until 600 nm, whereas analysing of emitted, can be performed until 750 nm. In here reported study excitation and emission range for the most intense fluorescence are presented. There were prepared four solutions of pyrolytic products in the n-hexane: 4 ppm, 20 ppm, 100 ppm and 500 ppm. In order to show dependence of intensity fluorescence and shapes of excitation-emission spectra on type of distillate and concentration both kind of visualization – three-dimensional and as contour maps – are shown in this article. In analysed range of wavelengths, intensity of fluorescence grows with concentration of oil, whereas structure of the shape of spectra simplify when concentration increases. The presented effects associated with the fluorescence of pyrolysis products allow to predict the possibility of developing a method for determining the content of these substances in mixtures with petroleum refining products and other liquid hydrocarbons.
Źródło:
Journal of KONES; 2018, 25, 2; 262-268
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ethnobotanical Survey of Commonly Used Medicinal Plants in Northern Cross River State, Nigeria
Autorzy:
Akwaji, P. I.
Eyam, E. O.
Bassey, R. A.
Powiązania:
https://bibliotekanauki.pl/articles/1178522.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Medicinal plants
Northern Cross River State
commonly used
herbal medicine
Opis:
An ethnobotanical survey of commonly used medicinal plants was carried out among the people of Northern Cross River comprising five Local Government Areas (Ogoja, Yala, Bekwarra, Obudu and Obanliku) in Cross River State, Nigeria through the use of oral interview using short structured questionnaires. Those interviewed included herbalist (native doctors) and herbal medicine sellers. The survey was to identify commonly used medicinal plants in these areas and how these medicinal plants are sourced and used. Results obtained from the survey show that a total of 110 plant species belonging to 43 families were identified as commonly used medicinal plants in the study area. The commonly used medicinal plants are mostly sourced from uncultivated land, communal (unprotected) and protected forests and farm lands. The survey revealed some of the local uses of these plants and the different ailments they can cure.
Źródło:
World Scientific News; 2017, 70, 2; 140-157
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Legal Terminology and Lesser Used Languages: The Case of Mòcheno
Autorzy:
Chiocchetti, Elena
Ralli, Natascia
Powiązania:
https://bibliotekanauki.pl/articles/620802.pdf
Data publikacji:
2011-06-01
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
legal terminology
terminology training
lesser used languages
Mòcheno
language planning
Opis:
The article aims at outlining the specific problems connected with the elaboration of legal and administrative terminology in a lesser used language and illustrating the methods and tools proposed considering the knowledge and competences to be conveyed.Since 2003 the Institute for Specialised Communication and Multilingualism of the European Academy of Bolzano (EURAC) offers education courses in legal terminology work, coupled with introductions in related/complementary disciplines, e.g. documentation, specialised translation and technical writing. Next to professional trainings, the Institute held also ad-hoc courses, such as a two-day course organised in 2008 for the Mòcheni, a Germanic minority living in the Italian Province of Trento. Since the passing of provincial law no. 6/2008, which foresees specific measures for the protection and promotion of local language minorities, the Mòcheno-speaking community has the right to use their language in all situations of social, economic and administrative life in both oral and written communications. Notwithstanding the recent compilation of a standard grammar, the Mòcheno language is not yet developed for the use in technical and specialised contexts. Indeed, the most urgent needs seem to exist in the translation of administrative terminology.
Źródło:
Research in Language; 2011, 9, 1; 135-146
1731-7533
Pojawia się w:
Research in Language
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The remote sensing method of forest fire danger rating categorization
Autorzy:
Mycke-Dominko, Małgorzata
Kwiatkowska, Joanna M.
Powiązania:
https://bibliotekanauki.pl/articles/2029439.pdf
Data publikacji:
2004-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
forest fire danger rating classification
remote sensing as used in research
Opis:
The article presents the use of satellite images in the determination of forest fire danger rating categories. The assessment was carried out based on images from the LANDSAT TM, IKONOS and NOAA satellites, with the finding that the LANDSAT TM images are the most useful. A new solution proposed is to make forest fire danger rating categories refer to forest ranger sub-districts, what gives the forest service greater control over forest fire prevention activities. Forest fire danger assessment was done taking into account remote sensing indices such as the NDVI, TNDVI, and IHT, as well by the analysis of the spatial distribution and the number of fires in the previous six years. In accordance with the Polish State Forest Classification System, three classes were specified: 1 - high fire danger, 2 - moderate fire danger, 3 - low fire danger.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2004, 11; 359-362
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Stand Adopted For Process Investigations Thermal Reclamation
Autorzy:
Łucarz, M.
Powiązania:
https://bibliotekanauki.pl/articles/380528.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal reclamation
used sand
foundry engineering
regeneracja termiczna
masa zużyta
odlewnictwo
Opis:
The paper presents the analysis of construction solutions of some thermal reclamation equipment applied in used sand reclamation treatment as well as the experimental appliance constructed according to the author`s own idea. The experimental apparatus enables the sand grains to be regained when the machine works in either the horizontal or the vertical position. Different construction versions of the apparatus were prepared to provide a variety of working conditions for thermal reclamation treatment in order to obtain the reclaimed sand in the most efficient way. The possibility of choosing from among various set points of the appliance, such as the temperature of reclamation process, the time of thermal treatment cycle, the method of fluidization (cold or hot air) and other individual parameters characteristic of particular construction versions create the conditions for comparative research.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1 spec.; 103-106
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rewards and Punishments Used by Parents and Development of Creativity
Autorzy:
Mendecka, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/28766335.pdf
Data publikacji:
2006-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
children’s creative abilities
creative development
rewards and punishments used by parents
Opis:
Family influences the personalities of all its members by creating conditions for individual development. As it also influences the development of creative personality, it was investigated to what extent rewards and punishments used by parents influence the development of children’s creative abilities. A diagram explaining the way family enhances creativity was made and verified. It was based on M. Tyszkowa’s paradigm, which makes a cognitive interpretation of ecological theories possible. Also, the theory of psychosocial phases in individual development by E. Erikson was used as well as his description of conflicts, which are characteristic of each phase. It was assumed that appropriate conditions of development allow to avoid serious conflicts and to cope with tasks in each phase of development. The results show a co-relation between the development of creative abilities and parents’ reactions to the activities that children aged 8–9 perform on their own in order to check their own competence. The research examined two groups of children, who obtained extremely high and low scores in the creativity test: high creativity group and low creativity group. Each group consisted of 30 children, presenting analogic features. The children’s level of creative abilities was measured with J. Zborowski’s Test. The projective test was used to investigate the forms of reward and punishment used by parents. The results of the research show that the development of creative abilities depend on rewards and punishments used in family. The role of father is particularly important in this context.
Źródło:
The New Educational Review; 2006, 9; 77-91
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sampled Signal Description That Is Used in Calculation of Spectrum of This Signal Needs Revision
Autorzy:
Borys, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/27311919.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Sampled signal
Sampled signal descriptions used for calculation of its spectrum
signal
Opis:
In this paper, we show why the descriptions of the sampled signal used in calculation of its spectrum, that are used in the literature, are not correct. And this finding applies to both kinds of descriptions: the ones which follow from an idealized way of modelling of the signal sampling operation as well as those which take into account its non-idealities. The correct signal description, that results directly from the way A/D converters work (regardless of their architecture), is presented and dis-cussed here in detail. Many figures included in the text help in its understanding.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 2; 319--324
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lubricant analysis as the most useful tool in the proactive maintenance philosophies of machinery and its components
Autorzy:
Kučera, Marián
Kopčanová, Silvia
Sejkorová, Marie
Powiązania:
https://bibliotekanauki.pl/articles/409706.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
engineering system
lubricant condition monitoring
proactive maintenance strategy
used oil analysis program
Opis:
Condition monitoring and fault diagnosis of engineering systems are critical for the stable and reliable operation in various areas as mobile technology (primarily agricultural, forestry, mining and construction machinery), railways, airlines and large fleets. Thus, to achieve a satisfactory level of reliability for the life of a machine, proactive maintenance strategy is the only key. This means that the application of classical reliability methods suitable for components with sudden failures can be complemented by technical diagnostic methods which have the potential to provide the information about the system condition. In this article we focus on the diagnostic signal related to the used oil – tribodiagnostic measures and is an interesting theoretical item related to the evaluation of the quality of lubricants in the aspect of operation. This is because the oil is in direct contact with single parts of the assessed technical systems. Results tests were reviewed and derived from various parameters of lubricants and their limits that highlight the condition and state of the lubricants under varying categories which include, physiochemical, elemental (wear), contamination and additive analysis.
Źródło:
Management Systems in Production Engineering; 2020, 3 (28); 196-201
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Used Furan Sand Reclamation in REGMAS Vibratory Unit
Autorzy:
Dańko, J.
Dańko, R.
Skrzyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/381674.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
used sand
mechanical reclamation
environmental protection
masa zużyta
regeneracja mechaniczna
ochrona środowiska
Opis:
The paper, especially dealt with problems of reclamation of used furan sand, carried out in new, vibratory sand reclamation unit REGMAS developed by researches from AGH-University of Science and Technology, Faculty of Foundry Engineering in Cracow (Poland). Functional characteristics of reclamation unit as well as the results of reclamation of used sand with furfuryl resin are discussed in the paper. The quality of reclaim was tested by means of the LOI and pH value, dust content in the reclaim and at least by the the quality of the castings produced in moulds prepared with the use of reclaimed matrix.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3; 25-28
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of used materials as an example of business management with regard to the ecological aspect – Canon case study
Autorzy:
Czuma - Imiołczyk, Lidia
Imiołczyk, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/1177340.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Business management
environmental aspect of organization management
management of used materials
reuse
Opis:
The paper presents the concept of re-use of used materials at Canon. The possibilities of re-use of previously used products are described, as well as the ecological aspect of business management. The processes related to the re-development occurring in the Canon company were analyzed. Canon is a Japanese company specializing in imaging and optical products, such as cameras, cameras, photocopiers and computer printers. He is one of the pioneers in the reuse of printer toners.
Źródło:
World Scientific News; 2018, 104; 145-156
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation and improvement of combustor structure in 3D printed sand recycling system
Autorzy:
Gao, Xiao
Lei, Mao
Xu, Weiwei
Powiązania:
https://bibliotekanauki.pl/articles/27315668.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
3D printing
CPFD
Computional Particle Fluid Dynamics
thermal reclamation of used sand
Opis:
In this paper, a new combustor with an output of 5 t/h is designed based on a computational particle fluid dynamics (CPFD) model. The flow field simulation is combined with the combustion simulation to analyze the internal two-phase flow, temperature field, and combustion products. The combustor structure was optimized. The simulation results show that the recovery efficiency of the waste sand and the energy utilization of the combustor can be improved under the original structure. The sand bed has a significant effect on flow field characteristics. The increase in particle temperature in the combustor increases the efficiency of waste sand recovery by increasing the height of the sand bed by 50 mm. The utilization rate of natural gas is increased and the economic efficiency is improved. The feasibility of the CPFD method can simulate the flow field characteristics inside the combustor very effectively.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 4; 19--27
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 49

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