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Wyświetlanie 1-15 z 18
Tytuł:
Coastal zone monitoring using SENTINEL-1 SAR polarimetry data
Autorzy:
Chybicki, A.
Markiewicz, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/332376.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
GIS
remote observation
data processing
Opis:
In recent years the role of the surveillance and security of Polish boundaries has significantly increased. Polish coastal zone monitoring requires various approaches using various technological means in order to ensure the protection of Polish boundaries. In this paper, the authors discuss and present alternatives to underwater surveillance methods of coastal area analysis and monitoring using data retrieved from the newly developed and operational Synthetic Aperture Radar (SAR) Sentinel-1 (ESA S-1) satellite. The authors discuss whether the proposed data source is a valid and reliable source of data that can be utilized in the current Polish coastline monitoring strategy and increase the safety of the country. A description of the various parameters concerning the data for the sea surface, sea objects and technical infrastructure are also discussed and presented.
Źródło:
Hydroacoustics; 2015, 18; 25-32
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Voice maps - system supporting navigation of the blind
Autorzy:
Kamiński, Ł.
Stepnowski, A.
Markiewicz, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/331860.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
Improving comfort of life of blind people is a problem of great importance. Neither a white cane nor a guide dog, although both very useful, can be considered as a navigation tool, as they provide only a slight increase of independence in everyday movement around the city. On the market there are some navigation tools inspired by car navigation systems, but they have many flaws, ranging from positioning inaccuracies to high prices. A novel solution is presented in the article - a prototype application for casual smartphones. It utilizes electrocompass, built-in GPS receiver and optional DGPS receiver, which ensures acceptable accuracy. Main spatial data source is the popular OpenStreetMap system. Extra batch of spatial data can be added by users or community. Software part of the system guides users to desired target, using speech synthesis.
Źródło:
Hydroacoustics; 2012, 15; 83-90
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coastline change-detection method using remote sensing satellite observation data
Autorzy:
Markiewicz, Ł.
Mazurek, P.
Chybicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/331592.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
coastal monitoring
SAR
Sentinel
Landsat
background subtraction
image processing
Opis:
Coastal zones are not only the fundaments for local economics based on trade, shipping and transport services, but also a source of food, energy, and resources. Apart from offering diverse opportunities for recreation and tourism, coastal zones provide protection against storms and other meteorological disturbances. Environmental information is also essential because of the direct influence on a country’s maritime zones, which are territorial sea and exclusive economic zones. Keeping local communities and ecosystems healthy requires monitoring and assessing of all the vital changes of territorial sea and its baseline. The paper presents a method and a concept of a system that provides an efficient means of automatic analysis of spatial data provided by satellite observation systems (optical Landsat 8 and SAR Sentinel 1) in order to monitor, and detect, changes in the coastline. The proposed methodology is based on a set of algorithms that enable one to trace and detect changes in coastline shape, and eventual damage to marine infrastructure, such as breakwaters and harbours, relying on high resolution satellite observational products.
Źródło:
Hydroacoustics; 2016, 19; 277-284
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multidimensional GIS for satellite imagery analysis
Autorzy:
Drypczewski, K.
Markiewicz, Ł.
Stepnowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/332659.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
Multidimensional GIS
Raster Data Manager
RASDAMAN
SENTINEL-1
SAR
Coastal Monitoring
coast change detection
Opis:
Multidimensional Geographical Information System allows storing, querying and processing of multidimensional query data. It is able to process satellite imagery and provide tools for its analysis. In the article authors present the developed system that analyzes a time series of SENTINEL - 1 mission satellite imagery acquired over the coast of Poland. The algorithm used finds and detects changes in the shape of the coastline over a long period of time. The system uses a Raster Data Manager array database management system to simplify the process of data querying, trimming, storing and analysing. Authors present how the recent trends in GIS development, like RASDAMAN, can be applied to satellite imagery processing.
Źródło:
Hydroacoustics; 2017, 20; 41-50
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of navigation in the mobile application supporting movement of the blind
Autorzy:
Wiśniewski, B.
Drypczewski, K.
Markiewicz, Ł.
Kamiński, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/332007.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
This paper presents conclusions from the last development phase of the “Voice Maps” project. Authors specify newly found available options for navigation in affordable system for the blind with all their related aspects. System uses dedicated geographical data, built-in smartphone GPS receivers and DGPS external device in order to assist blind users in their everyday travelling. Authors also discuss new methods to improve positioning accuracy and navigation reliability (map matching and remote pathfinding) along with interface modules for the blind.
Źródło:
Hydroacoustics; 2013, 16; 243-252
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Client-server Approach in the Navigation System for the Blind
Autorzy:
Markiewicz, Ł.
Drypczewski, K.
Wiśniewski, B.
Kamiński, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/117366.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Navigation System
Navigation System for the Blind
voice maps
Spatial Data
geographic information system (GIS)
Mobile Device
pathfinding
mobile application
Opis:
The article presents the client-server approach in the navigation system for the blind - “Voice Maps”. The authors were among the main creators of the prototype and currently the commercialization phase is being finished. In the implemented prototype only exemplary, limited spatial data were used, therefore they could be stored and analyzed (for pathfinding process) in the mobile device’s memory without any difficulties. The resulting increase of spatial data scale and complexity required a modification of the data storage and operation. Consequently, the decision was made to maintain a central spatial database, which is accessed remotely. After that modification, the mobile application fetches the required batch of spatial data (with the pathfinding and search results) from the central server through the mobile internet connection, which has also become necessary for other purposes (e.g. voice recognition). The authors present the advantages and disadvantages of this new approach along with the results of the server operational tests.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 3; 395-400
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CURRENT AND TRADITIONAL VIEWS ON THE BRAIN WORKS
Autorzy:
Kaczmarek, Bożydar L.J
Markiewicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2137723.pdf
Data publikacji:
2018-07-22
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
ERPs
neuronal circuits
neuromarkers
neuromodulation
neurofeedback
Opis:
The present paper argues that the development of a new methodology in studying the brain has resulted in a change of our views on the way it works, has seen the emergence of new ideas, and a considerable modification of traditionally accepted theories. The most significant are neuroplasticity, negative activity network (NAT), the nature of aphasic disorders, and the approach to the localization of brain functions. New brain imaging techniques have confirmed also the ability to change the neuronal circuits by mental force. Moreover, new techniques have brought about a rise in new methods for both the diagnosis and rehabilitation of individuals with various brain disorders. Most valuable in this respect has proved to be neurofeedback. We have concentrated on the most important contributions of Prof. Pąchalska in the implementation and development of these new ideas on brain functioning. We also emphasize the fact that her theoretical considerations are firmly based upon her extensive (forty years) work with brain damaged patients.
Źródło:
Acta Neuropsychologica; 2018, 16(2); 201-212
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of intake system modification on the formula student engine power.
Autorzy:
Markiewicz, T.
Kaczmarczyk, Ł.
Fabiś, P.
Powiązania:
https://bibliotekanauki.pl/articles/198373.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
Formula Student
intake
engine power
wlot
moc silnika
Opis:
This paper is a summary of the design and workmanship of the formula student engine intake vehicle, for simulation research projects were conducted on the intake system. In the process, the most favourable model system was selected, which was capable of producing a satisfactory range of the characteristics of the engine. For chosen models, the intake system was also determined in terms of its impact on the power and torque of the test vehicle, which was driven by a four-cylinder engine with a displacement of 0.6 dm3 .
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2017, 94; 139-149
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of selected operating parameters of engine powered by a mixture of biocomponents and diesel oil
Autorzy:
Markiewicz-Patalon, M.
Muślewski, Ł.
Kaszkowiak, J.
Knopik, L.
Powiązania:
https://bibliotekanauki.pl/articles/244467.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
means of transport
diesel oil
biocomponent
alternative fuels
Opis:
Reaching of high parameters of a drive unit and low pollution of the natural environment is considered to be the most desired effect of motorization. The use of the additive in the form of fatty acid methyl esters to the diesel oil, assumes lowering of harmful fuel gases’ emission and reaching high operating parameters of an engine, such as power and turning moment. Studies on the power output and the turning moment of an engine with self-ignition are presented in the study. The subject matter of the studies was a combustion engine with self-ignition of the power of 80 kW with the direct common rail system and turbo-compressor’s supercharging and with electromagnetic injectors. The tested engine was powered with diesel oil and the mixture of fatty acid methyl esters and the diesel fuel, in proportions 10%, 30% and 50% with an improver, at the standard settings of the fuel injection controllers. The vehicle used for the testing purposes, has been singled out with respect to the specific features, such as: universality of its use as a means of transportation and the opportunity of modification of the injection parameters, resistance to possible unfavourable consequences resulting from the use of the fuel mixture. The studies were conducted on a chassis test house, at full engine’s loading. The vehicle placed on the test house’s rollers, was strapped with belts to the foundation, and then accelerated up to the specific speed and subjected to loading standing in place. In such a manner, the road conditions were simulated. The obtained results of the tests were subject to the statistical analysis. From their analysis it results, that application of the mixture lowers the engine’s parameters to a degree unnoticeable at the time of its operation.
Źródło:
Journal of KONES; 2018, 25, 2; 239-244
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil organic matter status in agricultural soil sequence of former shoreline of disappearing Sumowskie Lakes, North-Eastern Poland
Sta glebowej materii organicznej w rolniczo użytkowanej sekwencji gleb dawnej strefy brzegowej zanikających jezior Sumowskich (północno-wschodnia Polska)
Autorzy:
Markiewicz, M.
Mendyk, L.
Gonet, S.S.
Powiązania:
https://bibliotekanauki.pl/articles/905624.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
soil organic matter
organic matter status
agricultural soil
shoreline
disappearing lake
Polska
Brodnica Lakeland
Opis:
The aim of the study has been to define the stocks and the basic properties of soil organic matter in agricultural-used soil sequence located in the former shoreline of disappearing lakes. The study area is located in the catchment of the Sumowskie Lakes, the Brodnica Lake District, North-Eastern Poland. The investigations involved preparation of five soil pits located in the south-western part of the former Sumowskie Lake bottom and on the southern slope of the adjacent kame hill. The greatest soil transformation is reflected in the quality and quantity of the soil organic matter. Indexes of organic matter quality and TOC stocks are significantly changing along the studied transect. The strongly humidified organic matter is found in mursh horizons. Gyttja layers above the groundwater level have a medium humification index. Horizons saturated with water are very low humidified. TOC stocks drop along the analysed soil sequence from the biogenic plain to the top of the kame hill.
Celem badań było określenie zasobów i podstawowych właściwości materii organicznej sekwencji rolniczo użytkowanych gleb dawnej strefy brzegowej zanikających jezior. Obszar badań był zlokalizowany w zlewni jezior Sumowskich na Pojezierzu Brodnickim w Polsce północno-wschodniej. Analizowano transekt składający się z pięciu profili glebowych znajdujących się w pd.-zach. części dawnego Jeziora Sumowskiego. Obejmował on dno dawnego jeziora oraz przylegające wzgórze kemowe. Największe zróżnicowanie gleb dotyczyło ilości i jakości glebowej materii organicznej. Zarówno właściwości materii organicznej, jak i jej zasoby wyraźnie różnicują się w analizowanym transekcie. Materia organiczna poziomów murszowych gleb pojeziornych odznacza się najwyższym stopniem humifikacji, warstwy gytii, powyżej poziomu wód gruntowych, pośrednim, a poziomy nasycone wodą najniższym spośród analizowanych. Zasoby węgla organicznego zmniejszają się wzdłuż transektu od gleb pojeziornych do szczytu pagórka kemowego (pararędziny).
Źródło:
Polish Journal of Soil Science; 2015, 48, 1
0079-2985
Pojawia się w:
Polish Journal of Soil Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of the injection moulding process on changes in selected physiochemical and mechanical properties of polyactide (PLA)
Wpływ parametrów procesu wtryskiwania na właściwości fizyczne, chemiczne i mechaniczne polilaktydu (PLA)
Autorzy:
Jałbrzykowski, M.
Minarowski, Ł.
Krucińska, I.
Herczyńska, L.
Markiewicz, G.
Powiązania:
https://bibliotekanauki.pl/articles/175811.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
polylactide
functional properties
molecular mass
degree of crystallinity
decomposition time
polilaktyd
właściwości użytkowe
masa cząsteczkowa
stopień krystaliczności
czas rozpadu
Opis:
Purpose: The aim of this paper was to assess the influence of parameters of the injection moulding process on changes in selected physiochemical properties and performance of parts made from PLA. Materials/Methods: 6201D trade polylactide by NatureWorks was used for the tests. Before the tests, the plastic was dried according to the manufacturer’s recommendations, and then injected by means of a Borche BS60 injection moulding machine. The process of injection was carried out at excessively high or excessively low process parameters. The obtained samples were subjected to tensile testing; then, their physiochemical properties were assessed by means of DSC, TGA and GPC. Results: The obtained test results indicate that parameters of the injection moulding process have an impact on the characteristics of parts made from PTA, such as: tensile strength, molecular mass, the degree of crystallinity, and time of degradation. Conclusions: The influence of the parameters of the injection moulding process on the changes of, among others, molecular mass, the degree of crystallinity and mechanical properties of PLA were observed. The obtained research results show that there exists a relationship between the parameters of the injection moulding process and molecular mass, the degree of crystallinity, and mechanical properties of parts made from polylactide. Considering that a change in molecular mass has an impact on the rate of PLA degradation, it is possible to control time of degradation, through the control of parameters of the injection moulding process.
W pracy przedstawiono wyniki badań wpływu parametrów procesu wtryskiwania na właściwości fizyczne, chemiczne i mechaniczne wyrobów z PLA. W badaniach stosowano handlowy polilaktyd 6201D firmy NatureWorks. Materiał był suszony zgodnie z zaleceniami producenta. Proces wtryskiwania wykonano za pomocą wtryskarki Borche BS60. Zrealizowany był dla jego dopuszczalnych maksymalnych i minimalnych parametrów. Dla wytworzonego materiału określono właściwości mechaniczne w próbie statycznej rozciągania oraz właściwości fizyczne i chemiczne metodami DSC, TGA i GPC. Analiza uzyskanych wyników badań wskazuje na wpływ parametrów procesu wtryskiwania na: wytrzymałość na rozciąganie, masę cząsteczkową, stopień krystaliczności, temperaturę rozpadu. Ustalono stopień korelacji pomiędzy parametrami procesu wtryskiwania a masą cząsteczkową, stopniem krystalizacji oraz właściwościami mechanicznymi wyrobów. Stwierdzono, że zmiana masy cząsteczkowej ma wpływ na kinetykę rozpadu polilaktydu PLA. Istnieje więc możliwość kontrolowanego sterowania czasem rozpadu PLA, poprzez sterowanie parametrami procesu wtryskiwania.
Źródło:
Advances in Manufacturing Science and Technology; 2018, 42, 1-4; 67-77
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coping Strategies and COVID-19 Prevalence Among University Students Learning in the Online and Blended Mode
Autorzy:
Markiewicz, Katarzyna
Kaczmarek, Bożydar L.J.
Oryshchyn-Buzhdyhan, Lidiya
Powiązania:
https://bibliotekanauki.pl/articles/2057076.pdf
Data publikacji:
2022-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
country
age
gender
personality
executive functions
Opis:
The study assessed whether students who contracted COVID-19 and did not fall ill differed in coping strategies. The study comprised 111 participants, including 55.9% who were infected and 44.1% who were not. It consisted of online (49.5%) and blended mode learners (50.5%) aged 19 to 31. We used the Brief COPE Inventory to assess ways of coping with stress. Among online students, 65.5% fell ill, while less than half of blended mode learners got sick. Students who contracted COVID-19 were more likely to use maladaptive coping strategies, and respondents who did not become ill were more likely to use adaptive strategies.
Źródło:
The New Educational Review; 2022, 68; 223-234
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of personality traits and study mode on mental health and stimulant use among university students during Covid-19 pandemic
Autorzy:
Markiewicz, Katarzyna
Kaczmarek, Bożydar L.J.
Gaś, Zbigniew B.
Powiązania:
https://bibliotekanauki.pl/articles/28762799.pdf
Data publikacji:
2023-09-11
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
the COVID-19 pandemic
stimulants
personality traits
emotions
university students
hybrid learning
Opis:
The COVID-19 pandemic has significantly increased feelings of insecurity and anxiety for the health of oneself and those of one’s loved ones, as well as for the future, which has led to an increased level of stress. This has resulted in a tendency to use alcohol and drugs. Studies show that such behaviors are triggered both by external and internal factors. Therefore, the study has looked for interrelations between personality traits, mental state, and learning mode (online versus hybrid) and the frequency of stimulants and tranquilizers consumption in the last 6-12 months of the COVID-19 pandemic. The study involved 113 university students aged 19-34. Due to pandemic-related limitations, 51.3% of students took online courses, while 48.7% were involved in hybrid learning. The participants were all asked to complete an online questionnaire that included 17 questions regarding mental health, drug and alcohol use. Additionally, the TIPI questionnaire was used to assess personality traits. The study found that online learning as well as feelings of loneliness and emptiness resulted in increased use of alcohol, antidepressants and sleeping pills. On the other hand, personality traits such as extraversion, agreeableness and emotional stability helped to limit the use of this type of stimulants. Online learners more often reported deterioration in their mental state, related to difficulties in adapting to pandemic-related conditions. This group was also more likely to use sedatives, sleeping pills, and antidepressants, with a significant difference in means, compared to hybrid students. In contrast, hybrid learners frequently reported a sense of the loss of meaning as well as worrying about the fate of loved ones, thinking back to a situation no longer under their control, and difficulties in making decisions. At the same time, most respondents of this group reported a positive vision of their future and a high sense of responsibility.
Źródło:
Acta Neuropsychologica; 2023, 21(4); 373-386
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
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