Autor: Piasecki, T. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Wybrane zagadnienia sterowania układem mikroprocesorowym DSP-FPGA prądnic przekształtnikowych pracujących równolegle w sieci okrętowej
Selected issues related to DSP-FPGA controlled inverters and electrical generators connected in parallel to ship’s electrical grid
Autorzy:: Kozak, M.
Piasecki, T.
Tematy:: prądnice elektryczne
falownik maszynowy
falownik sieciowy
praca równoległa przekształtników; Pokaż więcej
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Powiązania:: https://bibliotekanauki.pl/articles/376603.pdf Link otwiera się w nowym oknie
Opis:: W pracy przedstawiono założenia teoretyczne i wyniki działania rzeczywistego układu eksperymentalnego prądnic przekształtnikowych pracujących równolegle w sieci okrętowej. Układ elektromaszynowy składający się z dwóch prądnic asynchronicznej klatkowej i synchronicznej szczotkowej włączony jest do sieci dystrybucyjnej poprzez przekształtniki. W układzie pracującym równolegle realizowany jest proces rozdziału mocy czynnej i biernej po stronie falowników sieciowych poprzez sterowanie układem DSP-FPGA.
The paper covers theoretical background and chosen experimental results for solidstate converters working in parallel with two different kind of electrical generators connected to ship electrical grid. Asynchronous cage generator along with synchronous generator are connected with ships grid throu line side VSC inverters. Appropriate control algorithm of digital signal processor DSP and field-programmable gate array FPGA is used to achieve active and reactive power distribution.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Technical problems of mud pumps on ultra deepwater drilling rigs
Autorzy:: Bejger, A.
Piasecki, T.
Tematy:: drilling rig
mud pumps
damage to mud pump valves; Pokaż więcej
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:: https://bibliotekanauki.pl/articles/359900.pdf Link otwiera się w nowym oknie
Opis:: The article presents selected technical issues relating to drilling performed by a drillship, one type of drilling rigs. Basic problems encountered in the main function of such rigs − drilling a well − are failures of mud pumps. The authors investigate these pumps in operational conditions, aiming at development of a system for monitoring the technical condition of these pumps. Work on a diagnostic system is in progress that will permit to predict the condition of mud pump valves well in advance.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The assessment of the operational suitability of mud pumps on deep water drillships depends on maintenance strategy
Autorzy:: Piasecki, T.
Bejger, A.
Kozak, M.
Tematy:: drillships
mud pumps
maintenance strategies
valves
suction-discharge valves for mud pumps
drilling process; Pokaż więcej
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:: https://bibliotekanauki.pl/articles/135059.pdf Link otwiera się w nowym oknie
Opis:: This article examines the differences in the lifetime of mud pumps, which are part of the equipment on (ultra) deep-water drillships, depending on the strategy of maintenance. The authors conducted research on mud pumps to create an efficient diagnostic tool to help pumps operators on daily maintenance routines. We have created drilling process diagrams, one pertaining to the operation of mud pumps for which maintenance is carried out without technical supervision, the other including diagnostic maintenance. The diagrams show differences pump failure frequency.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Impact of CpG oligodeoxynucleotide stimulation on percentage of T and B cells in chicken
Autorzy:: Chrzastek, K.
Piasecki, T.
Wieliczko, A.
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/30568.pdf Link otwiera się w nowym oknie
Opis:: TLR stimulation in chickens has been shown to play a role in the initiation and regulation of innate and adaptive immune responses. The aim of this study was to use flow cytometry to establish the percentage of T and B subset in blood and lymphoid organs in chicks after CpG oligodeoxynucleotide (ODN) stimulation. It was demonstrated that the percentages of CD3⁺, CD4⁺, TCRγ δ⁺ cells and Bu-1⁺MHC class II⁺ cells in blood 24 h post-injection were significantly higher than in the control groups. It was also shown that the percentages of CD3⁺ and CD4⁺ cells in the spleen at 48 h post-injection were significantly higher than in control groups. The percentage of Bu-1⁺ cells in the bursa of Fabricius after CpG ODN stimulation (98.38 ± 0.84) was significantly higher than that found in the non-CpG ODN control group (94.54 ± 2.51) (p ≤ 0.05). The results indicate that class B CpG ODN increases the percentage of both T (especially CD4⁺ cells) and B cells.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Simple Wide Frequency Range Impedance Meter Based on AD5933 Integrated Circuit
Autorzy:: Chabowski, K.
Piasecki, T.
Dzierka, A.
Nitsch, K.
Tematy:: impedance
converter
AD5933
system-on-a-chip
measurement; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/221804.pdf Link otwiera się w nowym oknie
Opis:: As it contains elements of complete digital impedance meter, the AD5933 integrated circuit is an interesting solution for impedance measurements. However, its use for measurements in a wide range of impedances and frequencies requires an additional digital and analogue circuitry. This paper presents the design and performance of a simple impedance meter based on the AD5933 IC. Apart from the AD5933 IC it consists of a clock generator with a programmable prescaler, a novel DC offset canceller for the excitation signal based on peak detectors and a current to voltage converter with switchable conversion ratios. The authors proposed a simple method for choosing the measurement frequency to minimalize errors resulting from the spectral leakage and distortion caused by a lack of an anti-aliasing filter in the DDS generator. Additionally, a novel method for the AD5933 IC calibration was proposed. It consists in a mathematical compensation of the systematic error occurring in the argument of the value returned from the AD5933 IC as a result. The performance of the whole system is demonstrated in an exemplary measurement.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Laboratory evaluation of rubber linings used in flue gas desulphurization plants by the gravimetric method and impedance spectroscopy
Laboratoryjna ocena wykładzin gumowych używanych w instalacjach odsiarczania spalin, metodą grawimetryczną i spektroskopii impedancyjnej
Autorzy:: Drela, I.
Masalski, J.
Nitsch, K.
Piasecki, T.
Szczygieł, B.
Tematy:: odsiarczanie spalin
metoda grawimetryczna
metoda spektroskopii impedancyjnej
wykładzina gumowa
materiał powłokowy
flue gases desulphurization
gravimetric method
impedance spectroscopy method
rubber linings
lining material; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/172882.pdf Link otwiera się w nowym oknie
Opis:: Special cells made of austenitic steel were employed to carry out accelerated tests of lining materials in the autoclave at elevated temperature and at a pressure gradient along the sample’s thickness. The tests were carried out on three kinds of rubber linings: prevulcanized soft two-ply lining based on bromobutyl rubber, selfvulcanizing two-ply lining based on bromobutyl rubber and prevulcanized lining based on chlorobutyl rubber. Distilled water, 1 % aqueous solution of HCl and aqueous solution containing 50 g/dm3 of sulphuric acid and 26 g/dm3 of sodium bisulphate (IV) were used as the working medium in the tests. The temperature of the working medium in the autoclave was kept at 110±2°C and the sample exposure time amounted to 48 hours. The change in the mass of the samples after the proper time of exposure in the autoclave was determined by the gravimetric method. A measuring system made up of an Agilent 4294A high-frequency impedance analyzer and a low-frequency impedance analyzer with a Keithley 428 current/voltage transducer was used to perform measurements in a frequency range from 0.1 mHz to 10 MHz at activation with an voltage amplitude of 1 V[RMS]. The impedance measurement results show that despite the severe corrosive conditions in the autoclave and the gain in the mass of the samples, the tested coating materials did not undergo significant degradation during their exposure and keep good dielectric and protective properties.
Zastosowano specjalne komórki ze stali austenitycznej, umożliwiające przeprowadzenie przyspieszonych badań materiałów powłokowych w autoklawie w warunkach podwyższonej temperatury i gradientu ciśnienia na grubości próbki. Badania wykonano dla trzech rodzajów wykładzin gumowych: wstępnie wulkanizowanej miękkiej wykładziny dwuwarstwowej na bazie kauczuku bromobutylowego, dwuwarstwowej samowulkanizującej się wykładziny na bazie kauczuku bromobutylowego i wstępnie wulkanizowanej wykładziny na bazie kauczuku chlorobutylowego). W badaniach jako medium robocze stosowano wodę destylowaną, 1% roztwór wodny kwasu solnego oraz roztwór wodny zawierający 50 g/dm3 kwasu siarkowego i 26 g/dm3 wodorosiarczanu (IV) sodu. Temperaturę medium roboczego w autoklawie utrzymywano w zakresie 110±2°C, a czas ekspozycji próbek wynosił 48 godz. Metodą grawimetryczną oznaczano zmianę masy próbek po odpowiednim czasie ekspozycji próbek w autoklawie, a wykorzystując system pomiarowy zestawiony z wysokoczęstotliwościowego analizatora impedancji Agilent 4294A oraz niskoczęstotliwościowego analizatora impedancji z przetwornikiem prąd-napięcie Keithley 428 wykonywano pomiary w zakresie częstotliwości od 0,1 mHz do 10 MHz przy pobudzeniu o amplitudzie napięcia przemiennego 1 V[RMS]. Otrzymane wyniki badań impedancyjnych pozwalają stwierdzić, że badane materiały powłokowe, pomimo ostrych warunków korozyjnych w autoklawie i zwiększenia masy próbek, nie uległy znaczącej destrukcji podczas ekspozycji i zachowały dobre właściwości dielektryczne i ochronne.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Prevalence of internal parasites in hamsters in pet shops in Wroclaw
Autorzy:: Polozowski, A.
Piasecki, T.
Kowalska, M.
Klimiuk, M.
Hormanska, M.
Tematy:: prevalence
parasite
Giardia
Giardia duodenalis
animal infection
Trichosomoides nasalis
Syphacia
Hymenolepis nana
internal parasite
hamster
pet shop
Wroclaw city; Pokaż więcej
Wydawca:: Polskie Towarzystwo Parazytologiczne
Powiązania:: https://bibliotekanauki.pl/articles/5890.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Impedance Sensors Made in PCB and LTCC Technologies for Monitoring Growth and Degradation of Pseudomonal Biofilm
Autorzy:: Chabowski, K.
Junka, A. F.
Piasecki, T.
Nowak, D.
Nitsch, K.
Smutnicka, D.
Bartoszewicz, M.
Moczała, M.
Szymczyk, P.
Tematy:: Pseudomonas aeruginosa
biofilm
interdigitated sensor
impedance spectroscopy; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/221326.pdf Link otwiera się w nowym oknie
Opis:: The suitability of low-cost impedance sensors for microbiological purposes and biofilm growth monitoring was evaluated. The sensors with interdigitated electrodes were fabricated in PCB and LTCC technologies. The electrodes were golden (LTCC) or gold-plated (PCB) to provide surface stability. The sensors were used for monitoring growth and degradation of the reference ATCC 15442 Pseudomonas aeruginosa strain biofilm in invitro setting. During the experiment, the impedance spectra of the sensors were measured and analysed using electrical equivalent circuit (EEC) modelling. Additionally, the process of adhesion and growth of bacteria on a sensor’s surface was assessed by means of the optical and SEM microscopy. EEC and SEM microscopic analysis revealed that the gold layer on copper electrodes was not tight, making the PCB sensors susceptible to corrosion while the LTCC sensors had good surface stability. It turned out that the LTCC sensors are suitable for monitoring pseudomonal biofilm and the PCB sensors are good detectors of ongoing stages of biofilm formation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Application of the Triple Diagram Method in forecasting lake water level, on the example of Lake Charzykowskie
Autorzy:: Piasecki, Adam
Witkowski, Wojciech T.
Tematy:: geostatistics
kriging
lake
Lake Charzykowskie
Triple Diagram Method (TDM)
water level forecasting
water resources; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/2048503.pdf Link otwiera się w nowym oknie
Opis:: The work focused on forecasting changes in lake water level. The study employed the Triple Diagram Method (TDM) using geostatistical tools. TDM estimates the value by information from an earlier two periods of observation, refers as lags. The best results were obtained for data with an average a 1-week lag. At the significance level of 1σ, a the forecast error of ±2 cm was obtained. Using separate data for warm and cold months did not improve the efficiency of TDM. At the same time, analysis of observations from warm and cold months explained trends visible in the distribution of year-round data. The methodology, built on case study and proposed evaluation criteria, may function as a universal solution. The proposed methodology can be used to effectively manage water-level fluctuations both in postglacial lakes and in any case of water-level fluctuation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Geographia Polonica Vol. 97 No. 1 (2024)
Determining water level fluctuations in small-area lakes using satellite radar data
Autorzy:: Piasecki, Adam. Autor
Witkowski, Wojciech T. Autor
Wydawca:: IGiPZ PAN
Powiązania:: Keddy, P. A., & Reznicek, A. A. (1986). Great Lakes vegetation dynamics: The role of fluctuating water levels and buried seeds. Journal of Great Lakes Research, 12(1), 25-36. https://doi.org/10.1016/S0380-1330(86)71697-3
Wilcox, D. A. (2007). Lake-level variability and water availability in the Great Lakes. U.S. Geological Survey. https://doi.org/10.3133/cir1311
Zhang, B., Wdowinski, S., Oliver-Cabrera, T., Koirala, R., Jo, M. J., & Osmanoglu, B. (2018). Mapping the extent and magnitude of severe flooding induced by hurricane Irma with multi-temporal Sentinel-1 SAR and InSAR observations. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences 42, 2237-2244. https://doi.org/10.5194/isprs-archives-XLII-3-2237-2018
Nowlin, W. H., Davies, J. M., Nordin, R. N., & Mazumder, A. (2004). Effects of water level fluctuation and short-term climate variation on thermal and stratification regimes of a British Columbia reservoir and lake. Lake and Reservoir Management, 20(2), 91-109. https://doi.org/10.1080/07438140409354354
Woolway, R. I., Kraemer, B. M., Lenters, J. D., Merchant, C. J., O'Reilly, C. M., & Sharma, S. (2020). Global lake responses to climate change. Nature Reviews Earth & Environment, 1(8), 388-403. https://doi.org/10.1038/s43017-020-0067-5
Hooper, A., Bekaert, D., Spaans, K., & Arıkan, M. (2012). Recent advances in SAR interferometry time series analysis for measuring crustal deformation. Tectonophysics, 514-517, 1-13. https://doi.org/10.1016/j.tecto.2011.10.013
Geographia Polonica
Palomino-Ángel, S., Vázquez, R. F., Hampel, H., Anaya, J. A., Mosquera, P. V., Lyon, S. W., & Jaramillo, F. (2022). Retrieval of simultaneous water-level changes in small lakes with InSAR. Geophysical Research Letters, 49(2), e2021GL095950. https://doi.org/10.1029/2021GL095950
Nagabhatla, N., Cassidy-Neumiller, M., Francine, N. N., & Maatta, N. (2021). Water, conflicts and migration and the role of regional diplomacy: Lake Chad, Congo Basin, and the Mbororo pastoralist. Environmental Science & Policy, 122, 35-48. https://doi.org/10.1016/j.envsci.2021.03.019
Cao, N., Lee, H., Jung, H. C., & Yu, H. (2018). Estimation of water level changes of large- scale Amazon wetlands using ALOS2 ScanSAR differential interferometry. Remote Sensing, 10(6), 966. https://doi.org/10.3390/rs10060966
Gownaris, N. J., Rountos, K. J., Kaufman, L., Kolding, J., Lwiza, K. M. M., & Pikitch, E. K. (2018). Water level fluctuations and the ecosystem functioning of lakes. Journal of Great Lakes Research, 44(6), 1154-1163. https://doi.org/10.1016/j.jglr.2018.08.005
Bourgeau-Chavez, L., Endres, S., Battaglia, M., Miller, M. E., Banda, E., Laubach, Z., … & Marcaccio, J. (2015). Development of a bi-national Great Lakes coastal wetland and land use map using threeseason PALSAR and Landsat imagery. Remote Sensing, 7(7), 8655-8682. https://doi.org/10.3390/rs70708655
Zhang, M., Li, Z., Tian, B., Zhou, J., & Tang, P. (2016). The backscattering characteristics of wetland vegetation and water-level changes detection using multi-mode SAR: A case study. International Journal of Applied Earth Observation and Geoinformation, 45, 1-13. https://doi.org/10.1016/j.jag.2015.10.001
Demir, V., & Yaseen, Z. M. (2023). Neurocomputing intelligence models for lakes water level forecasting: A comprehensive review. Neural Computing and Applications, 35, 303-343. https://doi.org/10.1007/s00521-022-07699-z
Wdowinski, S., Kim, S. W., Amelung, F., Dixon, T. H., Miralles-Wilhelm, F., & Sonenshein, R. (2008). Space-based detection of wetlands' surface water level changes from L-band SAR interferometry. Remote Sensing of Environment, 112(3), 681-696. https://doi.org/10.1016/j.rse.2007.06.008
Piasecki, A., & Witkowski, W. T. (2021). Application of the Triple Diagram Method in forecasting lake water level, on the example of Lake Charzykowskie. Journal of Water and Land Development, (51), 11-16. https://doi.org/10.24425/jwld.2021.139009
Palomino-Ángel, S., Anaya-Acevedo, J. A., Simard, M., Liao, T.-H., & Jaramillo, F. (2019). Analysis of floodplain dynamics in the Atrato River Colombia using SAR interferometry. Water. 11(5), 875. https://doi.org/10.3390/w11050875
Håkanson, L. (1977). The influence of wind, fetch, and water depth on the distribution of sediments in Lake Vänern, Sweden. Canadian Journal of Earth Sciences, 14(3), 397-412. https://doi.org/10.1139/e77-040
Coulibaly, P. (2010). Reservoir computing approach to Great Lakes water level forecasting. Journal of Hydrology, 381(1-2), 76-88. https://doi.org/10.1016/j.jhydrol.2009.11.027
Brisco, B., Murnaghan, K., Wdowinski, S., & Hong, S. H. (2015). Evaluation of RADARSAT-2 acquisition modes for wetland monitoring applications. Canadian Journal of Remote Sensing, 41(5), 431-439. https://doi.org/10.1080/07038992.2015.1104636
Altunkaynak, A., Şen, Z. (2007). Fuzzy logic model of lake water level fluctuations in Lake Van, Turkey. Theoretical and Applied Climatology, 90(3), 227-233. https://doi.org/10.1007/s00704-006-0267-z
Coops H, Beklioglu M, & Crisman, T. L. (2003). The role of water-level fluctuations in shallow lake ecosystems-workshop conclusions. Hydrobiologia, 506, 23-27. https://doi.org/10.1023/B:HYDR.0000008595.14393.77
Yuan, T., Lee, H., Jung, H. C., Aierken, A., Beighley, E., Alsdorf, D. E., Tshimanga, R. M., & Kim, D. (2017). Absolute water storages in the Congo River floodplains from integration of InSAR and satellite radar altimetry. Remote Sensing of Environment, 201, 57-72. https://doi.org/10.1016/j.rse.2017.09.003
Piasecki, A., & Marszelewski, W. (2014). Dynamics and consequences of water level fluctuations of selected lakes in the catchment of the Ostrowo-Gopło Channel. Limnological Review, 14(4), 187-194. https://doi.org/10.1515/limre-2015-0009
Piasecki, A., Jurasz, J., & Adamowski, J. F. (2018). Forecasting surface water-level fluctuations of a small glacial lake in Poland using a wavelet-based artificial intelligence method. Acta Geophysica, 66(5), 1093-1107. https://doi.org/10.1007/s11600-018-0183-5
Hegerl, G. C., Black, E., Allan, R. P., Ingram, W. J., Polson, D., & Trenberth, K. E. (2015). Challenges in quantifying changes in the global water cycle. Bulletin of the American Meteorological Society, 96(7), 1097-1115. https://doi.org/10.1175/BAMS-D-13-00212.1
Wilcox, K. L., Petrie, S. A., Maynard, L. A., & Meyer, S. W. (2003). Historical distribution and abundance of Phragmites australis at Long Point, Lake Erie, Ontario. Journal of Great Lakes Research, 29(4), 664-680. https://doi.org/10.1016/S0380-1330(03)70469-9
Opis:: 24 cm
The research objective was to determine whether and to what extent SAR data can be used to determine changes in the water level in small glacial lakes (with an area of ~1 km2). The research object was Lake Biskupińskie – a small post-glacial lake in central Poland. As part of the research, a methodology for determining water level in small-area lakes based on radar data was developed, the potential for determining lake water levels using high- and medium-resolution SAR data was determined, and the results were verified against field measurements. The analyses employed data from two satellites, TerraSAR-X and Sentinel-1. The research confirmed the effectiveness of using SAR data to determine water-level fluctuations in small glacial lakes. The proposed methodology for working with data from the Sentinel-1 satellite allows for accurate estimation of WLF based on the results of interferometric analyses. Comparative analysis of the radar data results (lake surface) and field measurements (water level) were fully consistent with the data from TerraSAR-X and partially consistent with the data from Sentinel-1. The methodology of radar data analysis to determine WLF proposed in the paper has major research and applied potential, especially in the reconstruction of historical lake water levels.
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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