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Wyniki wyszukiwania dla: FUSARIUM SOLANI
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Performance of the flat plate solar collector operated with water-Al2O3 nanofluid
PublikacjaThe paper discusses the effect of application of water-Al2O3 nanofluid, as a working fluid, on the efficiency of a flat plate solar collector. The mass concentration of nanoparticles was 0.1%, 0.2% and 0.4%. The tests were conducted for two values of radiation of about 1050 W/m2 and 400 W/m2, and volume flow rates of 60 l/h, 120 l/h and 170 l/h. The efficiency was calculated according to recommendations of the Polish Standard....
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Performance of the flat plate solar collector operated with water-Al2O3 nanofluid
PublikacjaThis paper shows the experimental results of the performance a flat plate solar collector with water-Al2O3 nanofluid as a working fluid. The weight fractions of nanoparticles were 0.1%, 0.2% and 0.4%. The volume flow rate of nanofluid varied from 60 l/h to 170 l/h. The results show that application of nanofluids instead of pure water resulted in higher efficiency of the tested flat plate solar collector for given range of thermal...
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An Optimal Power Point Tracking Algorithm in a Solar PV Generation System
PublikacjaThe non-linearity in I-V characteristics of a PV panel requires to be operated at knee point to extract maximum power. In order to operate the panel at optimal point, maximum power point tracking (MPPT) algorithm is employed in the control structure. The main objective of MPP tracking is to keep the operation at knee point of I-V characteristics under varying condition of temperature and solar insolation. Under non uniform solar...
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Low frequency noise and DLTS as silicon solar cell characterization tools
PublikacjaPraca zawiera wyniki pomiarów DLTS próbek o powierzchni 1 mm2 krzemowych baterii słonecznych wykazujących znaczne niejednorodności wykryte za pomocą metody LBIV (Light Beam Induced Voltage). Wyniki pomiarów charakterystyk stałoprądowych oraz szumowych tych próbek zostały także przedstawione.
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Effect of temperature on dark current characteristics of silicon solar cells and diodes
PublikacjaW artykule przedstawiono analizę wpływu zmian temperatury na ciemne charakterystyki prądowo-napięciowe ogniw fotowoltaicznych i diod z monokrystalicznego krzemu. Badania eksperymentalne przeprowadzono w zakresie temperatur od 295 do 373 K. W celu wyznaczenia wartości rezystancji szeregowej wyznaczono szereg ciemnych charakterystyk I-U. Stwierdzono, że rezystancja szeregowa rośnie wraz ze wzrostem temperatury 0,65% /K i dlatego...
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Modelowanie wymiany wody w zbiornikach hodowlanych przy użyciu zmodyfikowanego modelu tłokowego na przykładzie basenów hodowlanych dla fok
PublikacjaNiniejszy artykuł opisuje sposób prostego modelowania wymiany wody w basenach hodowlanych fokarium Stacji Morskiej Instytutu Oceanografii Uniwersytetu Gdańskiego. W celu rozpoznania warunków wymiany wody oraz udziału stref zastoiskowych w basenach posłużono się dwiema uzupełniającymi się metodami. Były to badania traserowe z wykorzystaniem znacznika fluororescencyjnego oraz komputerowe obliczenia rozkładu linii prądu z użyciem...
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Costs of privatization of the banking sector in Poland in 1997-2000
Dane BadawczeOn June 14, 1996, a special law was passed on the merger and grouping of certain banks in the form of joint-stock companies. Pursuant to these regulations, the PeKaO S.A. banking group was established, which was the only entity of this type established in this way. Additionally, by the end of 1996, four out of nine regional banks were sold, i.e. Wielkopolski...
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Revenues from the sale of books in Poland (2009-2013)
Dane BadawczeAccording to the report "The book market in Poland 2014, the Library of Analysis", nearly 40,000 publishers were registered in Poland until mid-2013, of which it is estimated that only about 2,000-2,500 were active as publishers. According to the estimates of the authors of the Report, the value of the Polish book market in 2013 amounted to PLN 2.68...
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Employment structure by enterprise size in Poland in 2010-2014
Dane BadawczeMicro, small and medium-sized enterprises employ in total nearly 70% of all employees working in the corporate sector. Micro enterprises play a decisive role in this respect, accounting for nearly 40% of all employees. This dataset contains data showing the structure of the number of employees in enterprises in 2010-2014.
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The number of enterprises in Poland and selected EU countries in 2012
Dane BadawczeIn 2012, Poland was sixth in the ranking of the number of enterprises in selected European Union countries. In total, 22 million companies conduct business in the countries of the Community. However, when analyzing these values in relative numbers (calculated as the number of enterprises per 1000 inhabitants), Poland ranks only 22nd among the Member...
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The number of enterprises in Poland and EU countries (in thousands) in 2019
Dane BadawczeEnterprises from the SME sector constitute the majority of companies in Poland and in the European Union countries. However, the structure of domestic enterprises in terms of size and industry differs from the EU average. The following dataset contains the number of enterprises in Poland and EU countries (in thousands) in 2019.
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Tax system in Poland - current situation and direction of changes
Dane BadawczeThe study conducted on a group of 259 entrepreneurs from various regions of Poland concerns the opinions of business owners on the current tax situation, as well as potential changes in the tax system.
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CIT tax rates in Poland, Lithuania, Latvia and Estonia
Dane BadawczeThis dataset contains information on basic corporate tax rates (CIT) in the years 2000 - 2018 in the Baltic countries (Lithuania, Latvia i Estonia) and Poland.
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Employment structure in individual enterprises in Poland in 2010-2014
Dane BadawczeIt is worth mentioning the role of micro, small and medium-sized enterprises in the labor market. The above-mentioned entities employ in total nearly 70% of all employees who work in the corporate sector. Micro enterprises play a decisive role in this respect, accounting for nearly 40% of all employees.Comparing the data contained in the table below...
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The number of enterprises in Poland and EU countries (in thousands) in 2019
Dane BadawczeEnterprises from the SME sector constitute the majority of companies in Poland and in the European Union countries. However, the structure of domestic enterprises in terms of size and industry differs from the EU average. Taking into account the nature of the business in Poland, more companies operate in trade, and lower in services. However, it should...
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The fertility rate (TFR) in Poland in the period 1955-2017
Dane BadawczeThe fertility rate has dropped 2.5 times over the last 60 years. Immediately after the baby boom in the first half of the 1980s, many generations of women born in the second half of the 1970s, an increase in the number of births from the mid-1990s, were expected as a result of entering the age of the highest fertility age in Poland. which lasted until...
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Tax system in Poland - current situation and direction of changes
Dane BadawczeThe study conducted on a group of 259 entrepreneurs from various regions of Poland concerns the opinions of business owners on the current tax situation, as well as potential changes in the tax system.
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The structure of electricity production in Poland (data as at the end of 2010)
Dane BadawczeThe energy market in Poland is characterized primarily by the use of only one raw material for the production of electricity. In 2010, as much as 91.4% of electricity was produced on the basis of hard coal or lignite. Therefore, the remaining sources used for the production of electricity participated in the production of electricity to a small extent....
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The efficiency and reliability of pollutant removal in a hybrid constructed wetland with giant miscanthus and Jerusalem artichoke in Poland
PublikacjaIn this paper, we analysed the pollutant removal efficiency and reliability of a vertical and horizontal flow hybrid constructed wetland (CW) planted with giant miscanthus and Jerusalem artichoke. The wastewater treatment plant, located in south-eastern Poland, treated domestic sewage at an average flow rate of 1.2m3·d−1. The tests were carried out during. 5-years of operation of the sewage treatment plant (2011–2016). During this...
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Application of the ‘CPT 2012’model of AFNOR standard for column design in Poland–Jazowa case study
Publikacjahis paper presents the ‘CPT 2012’ model incorporated into the AFNOR NF P94-262:2012-07, French standard for pile design fully compatible with Eurocode 7, to the wider Polish audience. The bearing capacity of three reference columns for Vistula Marshlands have been calculated according to ‘CPT 2012’ model and AFNOR recommendations. Then, the design resistances have been compared with ultimate column bearing capacity measured during...
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On the production of electricity in Poland using a geothermal binary power plant - A thermodynamic overview - Part I
PublikacjaPoland has a significant potential of geothermal energy. However, the high-temperature sources that are needed to drive power plants are found in relatively few places. Therefore, the objective of this paper is to consider any location in the northern part of Poland as a possible place to build a binary power plant. A scientific research was confirmed the existence of an elevated temperature gradient in this region. The hot rocks...
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Wage determination, Global Value Chains and role played by wage bargaining schemes: The case of Poland
PublikacjaThis study examines the linkages between GVC involvement and wages in Poland given different wage bargaining schemes. The analysis is based on microdata from the European Structure of Earnings Survey for Poland combined with sectoral data from the World Input-Output Database. In particular, two measures of GVC involvement were used: the share of foreign value added (FVA) to export and the measure of traditional offshoring. The...
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A contribution to the moss and liverwort flora of the Reberce Nature Reserve at the Przemyśl Foothills (Western Carpathians, Poland)
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Road mortality of pond-breeding amphibians during spring migrations in the Mazurian Lakeland, NE Poland
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Spatial Variation in Long-Term Trends in a Metapopulation of the Globally Threatened Aquatic WarblerAcrocephalus paludicolain Poland
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THE APPLICATION OF BALANCED SCORECARD METHOD FOR THE SELECTION OF FACTORS USED IN THE EFFICIENCY MEASUREMENT OF PUBLIC HOSPITALS IN POLAND
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How Entrepreneurial Orientation Stimulates Different Types of Knowledge in the Internationalisation Process of Firms from Poland?
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An Analysis of External Finance Availability on SMEs’ Decision Making: A Case Study of the Emerging Market of Poland
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E-cigarette use among young adults in Poland: Prevalence and characteristics of e-cigarette users
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Health threat associated with Caucasian giant hogweeds: awareness among doctors and general public in Poland
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Evaluation of pollutant loading in the runoff waters from a major urban highway (Gdansk Beltway, Poland)
PublikacjaW artykule opisano wyniki badań dotyczących zawartości wybranych kationów i anionów w próbkach opadu otwartego, wód spływnych z ulic, wód spływnych z koron drzew oraz wody powierzchniowej, pobranych na terenie bedącym w zasiegu oddziaływania drogi szybkiego ruchu (Obwodnicy Trójmiejskiej). Wyniki zostały poddane analizie statystycznej. Zbadano m.in. korelacje pomiedzy zawartościami wybranych analitów w badanych próbkach wód a natężeniem...
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Application, design and operation of constructed wetland systems: case studies of systems in the Gdańsk region, Poland
PublikacjaDifferences in operation result from physical, chemical and biological conditions, which directly influence transformations in the whole aquatic-matrix-plants environment. Depending on the quantity of inflowing organic matter load and the rate of biochemical processes, the contaminations could be removed or/and retuned in the system. From this point of view the facility should be designed and operated in such way that the highest...
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Probabilistic Approach to Precipitation-Runoff Relation in a Mountain Catchment: A Case Study of the Kłodzka Valley in Poland
PublikacjaOn the basis of daily precipitation and discharges recorded in 1974–2013 relations between precipitation and runoff in the Kłodzka Valley (KV) in south-western Poland were analyzed. The degree of synchronicity between them was determined using the bivariate Archimedean copulas. This study aims at identifying and then describe in a probabilistic way the precipitation and runoff relations in the area playing an important role...
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Associations of Nutritional Behavior and Gut Microbiota with the Risk of COVID-19 in Healthy Young Adults in Poland
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Nutritional behaviors of women and men in Poland during confinement related to the SARS-CoV-2 epidemic
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Isolation and molecular characterization of Fowl adenovirus strains in Black grouse: First reported case in Poland
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Nutritional Behaviors of Women and Men in Poland During Confinement Related to the SARS-CoV-2 Epidemic
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RAILWAY WATER TOWERS OF WESTERN POLAND – HISTORIC NETWORKED ARCHITECTURAL RESOURCE AND ITS TYPOLOGICAL STRUCTURE
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Social media as an opportunity or a blind alley in social communication and forest education? – Experiences from Poland
PublikacjaThe article characterizes the experiences, problems, and prospects for the development of forest education on social media, which in Poland has been carried out by the Państwowe Gospodarstwo Leśne Lasy Państwowe (National Forest Holding ‘State...
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Regulations for unmanned aerial vehicle flights in Poland and other European countries – an analysis of the applicable law
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Spider Webs and Lichens as Bioindicators of Heavy Metals: A Comparison Study in the Vicinity of a Copper Smelter (Poland)
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Retrospective analysis of genetic diversity of Klebsiella oxytoca isolated in Poland over a 50-year period.
PublikacjaAnaliza genetyki populacji i określenie powiązań filogenetycznych pomiędzy szczepami może być niezwykle użytecznym podejściem w określaniu rozprzestrzeniania się wzorów genetycznych różnych gatunków bakterii na potrzeby epidemiologiczne. Nie ma danych, które opisywałyby długoterminowe sytuacje epidemiologiczne powodowane przez wielolekooporne, oportunistyczne szczepy Klebsiella oxytoca metodami molekularnymi. Celem przedstawionych...
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Industrial wastewater as an external carbon source for optimization of nitrogen removal at the "Wschod" WWTP in Gdansk (Poland)
PublikacjaCarbon source alternatives for denitrification belong to the highest research area priorities as they allow to optimize N removal within the existing capacities. In particular, some food industry effluents appear to be good candidates for such alternatives due to their high C/N ratios and high content of readily biodegradable organic fraction. The aim of this study was to determine the immediate effects of dosing different types...
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Perception of Pathologists in Poland of Artificial Intelligence and Machine Learning in Medical Diagnosis—A Cross-Sectional Study
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Public Perception of the Risks Associated with Infectious Diseases in Poland: Ebola and Influenza and Their Impact on the Attitude to Vaccination
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Prevalence of human pathogens of the clade Nakaseomyces in a culture collection—the first report on Candida bracarensis in Poland
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Usage of Over-the-Counter and Herbal Products in Common Cold in Poland: Findings from Consumer Survey
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Water Needs of Sweet Cherry Trees in the Light of Predicted Climate Warming in the Bydgoszcz Region, Poland
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Effect of Forecast Climate Changes on Water Needs of Giant Miscanthus Cultivated in the Kuyavia Region in Poland
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Psychopathological Symptoms Among Chronically Ill Patients During SARS-CoV-2 Pandemic in Poland
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