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Wyszukujesz frazę "Janowski, M." wg kryterium: Autor


Wyświetlanie 1-14 z 14
Tytuł:
Geotermalny system wspomagania zasilania w ciepło obiektu SOLPARKU w miejscowości Kleszczów
Geothermal System of Heat Support of THE SOLPARK facility in Kleszczów
Autorzy:
Janowski, M.
Kolasa, P.
Powiązania:
https://bibliotekanauki.pl/articles/203882.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
geotermia
energia odnawialna
ogrzewanie geotermalne
kaskadowy odbiór ciepła
geothermic
renewable energy
geothermal heating
geothermal cascade
Opis:
W miejscowości Kleszczów wykonano dwa odwierty geotermalne Kleszczów GT-1 oraz Kleszczów GT-2. Pierwszy pracuje jako otwór produkcyjny, drugi jako chłonny. Osiągają poziom jury środkowej oraz jury dolnej. Zaprojektowane zostało przyłącze energetyczne w postaci układu kaskadowego do już istniejącego systemu ciepłowniczego wybranych obiektów. Ze względu na wysokie koszty inwestycji geotermalnych, bardzo ważnym jest maksymalne wykorzystanie ciepła zawartego w wodach termalnych. Systemy kaskadowe są jednym ze sposobów na „głębokie schłodzenia” wody termalnej przed zatłoczeniem do otworu chłonnego. Praca systemu kaskadowego w Kleszczowie wymaga dostosowania jego ustawień i sposobu zasilania poszczególnych stopni kaskady do parametrów pracy odbiorców ciepła i ich charakterystyki zapotrzebowania na ciepło, a także do wydajności i temperatury zasilania systemu geotermalnego. W związku z czym systemy kaskadowe są na ogół układami szeregowo równoległymi, sterowanymi w zależności od chwilowego zapotrzebowania na ciepło u odbiorców poszczególnych stopni kaskady.
Due to the high investment costs of geothermal systems, the maximum utilization of the heat contained in the thermal waters is very important. Cascade systems are the one way to “deep cooling” the thermal water prior to injection into the injection well. The operation of the series system (cascade) requires the adjustment of the settings of the power supply of the various stages of the cascade to the operating parameters of the heat and the heat demand characteristics, and the capacity and the temperature of geothermal water. Accordingly, the cascade systems are generally parallel- serial circuits, controlled depending on the instantaneous heat requirement of the recipients of the individual steps of the cascade.
Źródło:
Technika Poszukiwań Geologicznych; 2016, R. 55, nr 2, 2; 67-78
0304-520X
Pojawia się w:
Technika Poszukiwań Geologicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of No-Reference Video Quality Metrics for HEVC Compression
Autorzy:
Rouis, K.
Leszczuk, M.
Janowski, M.
Papir, Z.
Tahar, J. B. H.
Powiązania:
https://bibliotekanauki.pl/articles/307568.pdf
Data publikacji:
2016
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
High Efficiency Video Coding (HEVC)
No-Reference metrics
Quality of Experience (QoE)
Video Quality Assessment
Opis:
The paper proposes a No-Reference (NR) quality assessment measurement originally developed for H.264, used for High Efficiency Video Coding (HEVC). In particular, authors present an investigation of NR metrics to objectively estimate the perceptual quality of a set of processed video sequences. The authors take into account typical distortions introduced by the block-based coding approaches like HEVC codec. The underlying processing used for the quality assessment considers the blockiness caused by the boundaries of each coded block and the blurring as a lack of spatial details. The correlation between the NR quality metrics and the well-known and most widely used objective metric, the Video Quality Model (VQM), is performed to validate the quality prediction accuracy based on the provided scores. The Pearson correlation coefficients obtained stand for promising results for different types of videos.
Źródło:
Journal of Telecommunications and Information Technology; 2016, 1; 22-28
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of determining the parturition date in bitches using the ultrasonographic fetometry as compared to hormonal and cytological methods
Autorzy:
Socha, P.
Rudowska, M.
Janowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/31979.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
effectiveness
determination
parturition
bitch
ultrasonographic fetometry
hormonal method
cytological method
fetometry
pregnancy
Opis:
In clinical practice, the parturition date in bitches is calculated on the basis of the established ovulation date, using determination of the level of LH and P4. Additionally cytological examination of vaginal smears makes it possible to establish the onset of diestrus, from which the delivery occurs after about 57 days. The latest method used in bitches for this purpose is foetal biometry. Measurements of the inner chorionic cavity diameter (ICC) and biparietal diameter (BP) with formulas published by Luvoni and Grioni have been popularized and the most practically useful. In a group of six bitches the effectiveness obtained with the use of ICC was 66.67% with an accuracy of 1 day and 100% with an accuracy of 2 days. BP measurements gave better results, as the accuracy was respectively 83.33% and 100%. The effectiveness of predicting the delivery date on the base of method consisting in determining the LH surge was 66.67% with an accuracy of 1 day and 100% with an accuracy of 2 days. The best effectiveness was obtained while using the method based on P4 level determination (100% both with an accuracy of 1 day, as well as of 2 days). The lowest accuracy was obtained while using the cytological method. Generally, a comparison of the methods used for predicting the date of delivery in bitches confirms practical usefulness of fetometry. Its effectiveness was not lower than traditional methods used so far, while its advantage lies in the ease of performance and the long term of application during gestation. However, full confirmation of the practical usefulness of this method requires further research on a larger number of animals.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of Quality of Experience in No-Reference Model
Autorzy:
Nawała, J.
Janowski, L.
Leszczuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/308352.pdf
Data publikacji:
2017
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
QoE
QoS
OTT
no-reference
quality assessment
Opis:
The key objective of no-reference (NR) visual metrics is to predict the end-user experience concerning remotely delivered video content. Rapidly increasing demand for easily accessible, high quality video material makes it crucial for service providers to test the user experience without the need for comparison with reference material. Nevertheless, the QoE measurement is not enough. The information about the source or error is very important as well. Therefore, the described system is based on calculating numerous different NR indicators, which are combined to provide the overall quality score. In this paper, more quality indicators than are used in the QoE calculation are described, since some of them detect specific errors. Such specific errors are dificult to include in a global QoE model but are important from the operation point of view.
Źródło:
Journal of Telecommunications and Information Technology; 2017, 2; 11-17
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Design of an Objective Metric and Construction of a Prototype System for Monitoring Perceived Quality (QoE) of Video Sequences
Autorzy:
Janowski, L.
Leszczuk, M.
Papir, Z.
Romaniak, P.
Powiązania:
https://bibliotekanauki.pl/articles/307891.pdf
Data publikacji:
2011
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
mean opinion score
no reference metric
objective metric
quality of experience
video artefacts
Opis:
The paper presents different no reference (NR) objective metrics addressing the most important artefacts for raw (source) video sequences (noise, blur, exposure) and those introduced by compression (blocking, flickering) which can be used for assessing quality of experience. The validity of all metrics was verified under subjective tests.
Źródło:
Journal of Telecommunications and Information Technology; 2011, 3; 87-94
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of the time - spatial filtration algorithm by 2d FFT expanded method and its properties
Autorzy:
Janowski, T
Kotłowski, A.
Męciński, W.
Okuniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/331969.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
spatial filtration algorithm
acoustics
Opis:
The article presents the simulation results of the time-spatial matched filtration algorithm in detail described in [1]. The features of the algorithm are presented on figures of the realized simulations. Firstly, the simulation results in case of jar field are described. Successively the realizability of different filtrations types within algorithms is presented. Next the possibility of the algorithm adaptation to nearfield is shown. The last of the presented properties are possibilities of the directions of arrival choice.
Źródło:
Hydroacoustics; 2003, 6; 229-234
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cosmogenic radionuclides in the Sołtmany (L6) meteorite
Autorzy:
Laubenstein, M.
Giampaoli, A.
Janowski, P.
Mietelski, J. W.
Powiązania:
https://bibliotekanauki.pl/articles/411508.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
meteorite
ordinary chondrite
short-lived radionuclides
cosmogenic radionuclides
gamma-ray spectrometry
52Mn
Opis:
Cosmogenic radionuclides were measured in two specimens of the Sołtmany chondrite (L6) that fell on April 30, 2011. The first fragment (154.9 g) was measured 12 days after the fall and the second piece (120 g), 53 days after the fall. Both fragments were measured by means of non-destructive gamma ray spectroscopy. The first specimen was examined with an ultra-low background high purity germanium (HPGe) detector in a deep underground laboratory. A standard low-background HPGe detector was used to examine the second fragment in a ground level laboratory. Twelve cosmogenic nuclides were detected in the activity range of 0.030 m・Bq g–1 until 1.5 m・Bq g–1 Their activities place constraints on the exposure history of the meteorite and reflect the effect of solar modulation of galactic cosmic rays during the solar maximum. On the activities of expected radionuclides 60 Co (< 0.0075 m・Bq g–1) and 44 Ti (< 0.023 m・Bq g–1) only upper limits could be given. Sołtmany is part of a group of only 14 meteorites where 52 Mn (5.591 d half life) could be determined.
Źródło:
Meteorites; 2012, 2, No. 1-2; 45-51
2299-0313
2299-1220
Pojawia się w:
Meteorites
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of progesterone-releasing intravaginal device on reproductive performance of cows with cystic ovarian follicles after puerperium
Autorzy:
Rudowska, M.
Barański, W.
Zduńczyk, S.
Tobolski, D.
Janowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2087479.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cows
cystic ovarian follicles
progesterone insert
fertility
Źródło:
Polish Journal of Veterinary Sciences; 2019, 3; 489-494
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence and etiological agents of subclinical mastitis at the end of lactation in nine dairy herds in North - East Poland
Autorzy:
Sztachanska, M.
Baranski, W.
Janowski, T.
Pogorzelska, J.
Zdunczyk, S.
Powiązania:
https://bibliotekanauki.pl/articles/30273.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of this study was to evaluate the prevalence and etiological agents of subclinical mastitis at the end of lactation in nine dairy herds in North-East Poland. In total, 387 Polish HF were involved in the study. The diagnosis of mastitis was performed on the basis of clinical examination of the udder, macroscopic evaluation of milk, determination of somatic cell count and bacteriological examination of milk. Subclinical mastitis was found in an average of 36.7% (range from 21.0% to 53.1%) of cows and of 15.7% (range from 9.6% to 25.2%) of quarters. Coagulase negative staphylococci (CNS; 31.6% of quarters), Streptococcus (Str.) agalactiae (15.6% of quarters), Staphylococcus (Staph.) aureus (12.1% of quarters) and fungi (12.2% of quarters) were most frequently isolated from subclinical mastitis. Etiological agents of subclinical mastitis differed strongly between herds. The results of this study showed that the incidence of subclinical mastitis at the end of lactation in dairy herds in North-East Poland is high. CNS were the most frequently isolated from subclinical mastitis cases, however mastitis caused by the contagious pathogens Str. agalactiae and Staph. aureus is still a problem. The fungal infections of the mammary gland also play an important role.
Źródło:
Polish Journal of Veterinary Sciences; 2016, 19, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence of subclinical endometritis in repeat breeding cows and mRNA expression of tumor necrosis factor α and inducible nitric oxide synthase in the endometrium of repeat breeding cows with and without subclinical endometritis
Autorzy:
Janowski, T.
Baranski, W.
Lukasik, K
Skarzynski, D
Rudowska, M.
Zdunczyk, S
Powiązania:
https://bibliotekanauki.pl/articles/32134.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Information on the prevalence of subclinical endometritis and its mechanism in repeat breeding cows is very limited. The aims of this study were: a) to evaluate the incidence of this disorder with cytobrush cytology b) to analyze mRNA expression of tumor necrosis factor α (TNFα) and inducible nitric oxide synthase (iNOS) in endometrial biopsy samples collected from repeat breeding cows with and without subclinical endometritis. Two experiments were carried out. In experiment 1, 112 (12.4%) repeat breeding cows (inseminated at least 3 times and not pregnant) were selected out of 902 cows from 8 dairy herds. Cytobrush cytology was performed on these cows, using the threshold of 10% PMNs in uterine smears. The results showed that 45 out of the 112 cows (40.2%) were diagnosed as having subclinical endometritis. In experiment 2, uterine biopsy samples were taken from repeat breeding cows with subclinical endometritis (n = 10) and without this disorder (n = 10). Using reverse transcription-PCR, the mRNA expression of TNFα and iNOS was determined. A statistically significant increase in expression of both substances was measured in the group of cows with subclinical endometritis (p < 0.05). These results provide evidence for a high prevalence of subclinical endometritis in repeat breeding cows as well as the involvement of TNFα and iNOS pathways in the regulation of this pathological condition.
Źródło:
Polish Journal of Veterinary Sciences; 2013, 16, 4
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maritime laser scanning as the source for spatial data
Autorzy:
Burdziakowski, P.
Janowski, A.
Kholodkov, A.
Matysik, K.
Matysik, M.
Przyborski, M.
Szulwic, J.
Tysiąc, P.
Wojtowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/259527.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
mobile laser scanning
maritime laser scanning
GIS for harbours
measurements of sea coast
boat-based scanning
Opis:
The rapid development of scanning technology, especially mobile scanning, gives the possibility to collect spatial data coming from maritime measurement platforms and autonomous manned or unmanned vehicles. Presented solution is derived from the mobile scanning. However we should keep in mind that the specificity of laser scanning at sea and processing collected data should be in the form acceptable in Geographical Information Systems, especially typical for the maritime needs. At the same time we should be aware that data coming from maritime mobile scanning constitutes a new approach to the describing of maritime environment and brings a new perspective that is completely different than air and terrestrial scanning. Therefore, the authors, would like to present results of an experiment aimed at testing the possibilities of using mobile scanning at sea. Experiment was conducted in the harbour and the associated environment of neighbouring southern coast of the Baltic Sea.
Źródło:
Polish Maritime Research; 2015, 4; 9-14
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of PAHs, activities of γ-radionuclides and ecotoxicological assessment in biochars
Autorzy:
Gondek, K.
Mierzwa-Hersztek, M.
Smreczak, B.
Baran, A.
Kopeć, M.
Mróz, T.
Janowski, P.
Bajda, T.
Tomczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/778621.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
biochar
sewage sludge
PAHs
γ-radionuclides
Vibrio fischeri
Opis:
The aim of this research was to determine the effect of thermal conversion temperature and plant material addition to sewage sludge on the PAHs content and the activity of selected γ-radionuclides in biochars, and to conduct an ecotoxicological assessment. The pyrolysis of the mixtures of sewage sludge and plant materials at 300°C and such temperature caused an increase in the contents of 2- and 3-ring hydrocarbons. During the pyrolysis of organic materials at 600°C, the amount of the following compounds was reduced in biochars: benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, indeno[1,2,3c,d]pyrene, dibenzo[a,h]anthracene, and benzo[g,h,i]perylene. Among γ-radioisotopes of the elements, natural radiogenic isotopes were dominant. 137Cs was the only artificial radioactive isotope. The pyrolysis of the mixtures of municipal sewage sludge and plant materials revealed that isotope  40K had the highest radioactive activity. In the case of other analysed nuclides, activities of  212Pb,  214Pb,  214Bi, and  137Cs were determined after the sample pyrolysis. The extracts from the mixtures of sewage sludge and plant materials were non-toxic to Vibrio fischeri.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 4; 27-35
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superconducting Devices for Power Engineering
Autorzy:
Janowski, T.
Kondratowicz-Kucewicz, B.
Wojtasiewicz, G.
Kozak, S.
Kozak, J.
Majka, M.
Jaroszyński, L.
Powiązania:
https://bibliotekanauki.pl/articles/1398596.pdf
Data publikacji:
2016-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.90.+n
84.60.Ve
84.70.+p
84.71.-b
84.71.Ba
84.71.Mn
85.25.-j
85.25.Am
85.25.Qc
Opis:
The paper presents the current state of research on superconducting devices for the electrical power system, i.e. transformers, fault-current limiters, and energy storages. In particular, it describes scientific achievements of the Laboratory of Superconducting Technologies of Electrotechnical Institute. The development of distributed and renewable energy sources, as well as the increasing number of receivers with low power factor will rise interest in superconducting fault-current limiters and superconducting transformers rated below 1 MVA. Previous studies were focused on the largest power transformers and highest current superconducting fault-current limiters. ReBCO coated conductors allow to build efficient superconducting AC devices. Superconducting tape of a layered structure (second generation HTS tape) enables the construction of transformer rated up to a few MVA without the usage of parallel conductors. Relatively high resistance of the tape in normal state allows to build fault-current limiters and fault-current limiting transformers. Superconducting transformers and superconducting fault-current limiters can help to increase connected power of distribution stations and thereby accelerate development of renewable energy sources.
Źródło:
Acta Physica Polonica A; 2016, 130, 2; 537-544
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-14 z 14

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