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Search results for: aromat miesa
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Preface
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New approaches to chromatographic determination of lipophilicity of xenobiotics
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High-throughput Evaluation of Lipophilicity and Acidity by New Gradient HPLC Methods
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A tool for designing water tanks for measuring hydroacoustic transducers
PublicationSpecial water tanks are commonly used to measure the parameters of underwater acoustic systems. They must meet specific requirements, the fulfilment of which ensures very small but acceptable measurement errors. These requirements define the size of the tank and its shape as well as the strong attenuation of reflected waves. At the design stage, it is necessary to determine the impact of the tank structure on the measurement errors...
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Uwodornienie oleju sojowego i rzepakowego na katalizatorach miedziowych promotorowanych niklem i tlenkiem glinu. Hydrogenation of soybean and rapeseed oil with copper catalysts activated with nickel and aluminium oxide
PublicationBadano nowy typ katalizatorów miedziowych promotorowanych niklem, o stosunku Cu do Ni w granicach od 1:0,0036 do 1:0,018 w?w, osadzonych na Al2O3, przeznaczonych do selektywnego uwodornienia kwasu linolenowego w olejach roślinnych. Uwodornienie prowadzono w laboratoryjnym reaktorze typu "dead end" na oleju sojowym i rzepakowym, a kontakty mieszane - w stęż. 0,5% i 1% Cu. Na podstawie badań stwierdzono, że promotorowanie znacząco...
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Noise effect on parameters of quiet sonar with code modulation
PublicationEarlier publications of the paper authors have shown that the use of code keying mixed with the CW FM sound signal allows the significant reduction in the distance measurement error, compared to classic silent CW FM sonar. In addition to the code modulation parameters, the magnitude of this error is influenced by the received input acoustic noise. The article shows the dependence of the input signal-to-noise ratio and the sound...
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Ship Dynamic Positioning Based on Nonlinear Model Predictive Control
PublicationThe presented work explores the simulation test results of using nonlinear model predictive control algorithm for ship dynamic positioning. In the optimization task, a goal function with a penalty was proposed with a variable prediction step. The results of the proposed control algorithm were compared with backstepping and PID. The effect of estimation accuracy on the control quality with the implemented algorithms was investigated....
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Impact of new, navigable canal through the Vistula spit on the hydrologic balance of the Vistula lagoon (Baltic Sea)
PublicationThe object of research - the Vistula Lagoon is one of the two lagoons on the Polish coast, which is of great importance not only from an economic point of view, but also an environmental one. The purpose of the paper is to provide calculations on the current water balance for the Vistula Lagoon, before and after construction of a canal through the Vistula Spit. This is important because the construction of a new connection between...
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Kładka dla pieszych nad ul. Ogińskiego w Bydgoszczy w świetle badań in situ
PublicationW pracy przedstawiono konstrukcję oraz metodykę badań pod próbnym obciążeniem kładki dla pieszych nad ul. Ogińskiego w Bydgoszczy. Omówiono wyniki statycznych i dynamicznych oraz sformułowano dotyczące zachowania się konstrukcji i warunków eksploatacji obiektu.
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Cichy sonar - stan aktualny i perspektywy
PublicationW zastosowaniach militarnych często istnieje potrzeba prowadzenia obserwacji w sposób skryty za pomocą urządzeń emitujących sygnały trudne do przechwycenia przez przeciwnika. Rozwiązania stosowane w cichych radarach stanowiły punkt wyjścia do opracowania cichego sonaru. Prace nad projektem rozpoczęto na Politechnice Gdańskiej w roku 2010 w ramach Grantu NCBiR i są one dalej kontynuowane. W celu zachowania w cichym sonarze warunków...
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Digital Fingerprinting Based on Quaternion Encryption Scheme for Gray-Tone Images
PublicationIn this paper a new idea of digital images fingerprinting is proposed. The method is based on quaternion encryption in the Cipher Block Chaining (CBC) mode. Quaternion sare hyper-complex numbers of rank 4 and thus often applied to mechanics in three-dimensional space. The encryption algorithm described in the paper is designed for gray-tone images but can easily be adopted for color ones. For the encryption purpose, the algorithm...
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A new quaternion-based encryption method for DICOM images
PublicationIn this paper, a new quaternion-based lossless encryption technique for digital image and communication on medicine (DICOM) images is proposed. We have scrutinized and slightly modified the concept of the DICOM network to point out the best location for the proposed encryption scheme, which significantly improves speed of DICOM images encryption in comparison with those originally embedded into DICOM advanced encryption standard...
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Sampling Procedures in Studies of Cloud Water Composition: A Review
PublicationThe authors set out and classify the principles of operation of known types of cloud water collectors, and critically review their advantages and drawbacks. Analysis of the literature has yielded information on the parameters of various type of collectors—sampling time, the type of cloud from which the water sample was taken, droplet diameter collected with 50% efficiency (cut off), sample analytes/ parameters determined, types...
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Digital Fingerprinting based on Quaternion Encryption for Image Transmission
PublicationIn this paper a new digital fingerprinting scheme for images is proposed. A proposed method is based on quaternion encryption with Cipher Block Chaining (CBC) mode of operation. Quaternions are hyper-complex numbers of rank 4 and thus often applied to mechanics in three-dimensional space. The encryption algorithm is designed for grey-tone images. For purpose of encryption, the algorithm uses the rotation of data vectors presented...
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Circular saw vibrations or dynamics of the spindle
PublicationSawing of wood with circular saws is a typical example of cutting with multi-blade tools. In that kind of cutting, theposition accuracy of following tool blades is a crucial factor which affects the cutting process and machining final effects.Position tooth errors may cause deterioration in cutting conditions, changes in loads of individual teeth and the tool as a whole,and also a decrease in accuracy and surface quality after...
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Circular saw blade dynamics - the measurement method
PublicationW pracy przedstawiono przyczyny i efekty zmiany położenia ostrzy piły tarczowej w układzie przecinania. Przedstawiony sposób pomiaru dynamiki piły tarczowej umożliwia określenie przyczyn drgań, co stanowi podstawę skutecznej ich minimalizacji.
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Dynamics of the total system of the circular sawing machine
PublicationW pracy przedstwaiono przyczyny i efekty zmiany położenia ostrzy piły tarczowej. Opisana metoda pomiaru zachowania dynamicznego piły pozwala uzytkownikowi okreslic przyczyny drgań. Ponadto, może wskazać drogi efektywnej ich minimalizacji.
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Mechatronic system for automatic inspection of circular saw teeth
PublicationArtykuł prezentuje system mechatroniczny do automatycznej oceny geometrii ostrzy pił tarczowych. Opisywany system wizyjny został zastosowany w automatycznym kontrolerze ostrzy pił tarczowych WKOPTar. Wrzeciono urządzenia posiada swój napęd sterowany bezstopniowo obrazem ostrzy i zapewnia powtarzalne pozycjonowanie ostrzy w celu przechwycenia ich obrazów, które są następnie analizowane z wykorzystaniem specjalnego oprogramowania....
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Diagnostic usefulness of granulometric analyses of chips distribution while sawing of wood
PublicationW niniejszym artykule opisano drogi transportu wiórów w procesie przecinania drewna i ich wpływ na rozdrobnienie wiórów. Przedstawiono również wyniki badań rozkładu segregacji wiórów powstających w procesie przecinania piłą o powszechnie stosowanej konstrukcji i piłą z domkniętymi rowkami wiórowymi.
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Ab initio study of phenyl benzoate: structure, conformational analysis, dipole moment, IR and Raman vibrational spectra
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2,2,6,6-Tetramethylpiperidinium triisopropoxysilanethiolate
PublicationTytułowy związek został otrzymany poprzez reakcję tri-izo-propoksysilanotiolu z 2,2,6,6-tetrametylopiperydyną. Oba fragmenty jonowe powiązane są wiązaniami wodorowymi N-H...S. Strukturę cząsteczkową i krystaliczną wyznaczono posługując się rentgenowską analizą strukturalną.
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THE ANALYSIS OF CURRENT TRENDS IN THE INSURANCE SEGMENT OF THE FINANCIAL MARKET OF UKRAINE
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Medical transport of ambulances. Analysis of travel time
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Application of Reversible Logic in Synthesis of Traffic Control Systems
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Approach Manoeuvre During Emergency Ship-to-Ship Transfer Operation with Oil Spill
PublicationOne of the major activities during Ship to Ship (STS) transfer operation at sea is to safe approach the Ship to be Lightered (SBL) which moves on a constant heading with slow speed or drifting. In the paper described the manoeuvring problem for approaching during emergency STS transfer operation with oil spill. The approach manoeuvre is considered as a sequence of navigation manoeuvres in specific navigational environment with...
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Trajectory planning for Service Ship during emergency STS transfer operation
PublicationIn this paper trajectory for approaching during emergency STS transfer operation with oil spill is considered as a sequence of navigation manoeuvres in specific navigational environment. The designed way points - ship positions and speed are determined as reference values to support navigator in decision making during steering and to mitigate the risk of collision which mostly results from exceeding the speed limit of approaching....
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Analysis of distance measurement errors in CW FM sonar with MLS code modulation
PublicationAlthough used in the classic silent sonar, the CW FM sounding signal has a major flaw which is its inaccuracy in determining the distance to a target. The authors of the article have developed a concept of silent sonar using frequency modulation signals switched by pseudorandom codes, already discussed in their previous work. This article presents a detailed analysis of errors in CW FM sonar with pseudo-random sequence code modulation...
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Navigational decision support system during approach manoeuvre in emergency STS transfer operation
PublicationThe paper is concerned with the problem of safe trajectory planning for approaching during emergency STS (Ship to Ship) transfer operation with oil spill. The safe trajectory means that the way points does not cross in the area of the environment with the static and dynamic obstacles and at the same time satisfies ship's stopping and speed deceleration performance. The evolutionary path planning algorithm is used to determine trajectory...
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Digital fingerprinting for color images based on the quaternion encryption scheme
PublicationIn this paper we present a new quaternion-based encryption technique for color images. In the proposed encryption method, images are written as quaternions and are rotated in a three-dimensional space around another quaternion, which is an encryption key. The encryption process uses the cipher block chaining (CBC) mode. Further, this paper shows that our encryption algorithm enables digital fingerprinting as an additional feature....
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Akustyka podwodna historia i współczesność
PublicationJubileusz pięćdziesięciolecia Komitetu Akustyki Polskiej Akademii Nauk, przypomnienie drogi która przeszła polska akustyka w tym długim, półwiecznym okresie. Na tym tle, w sposób bardziej widoczny jawi się jej stan aktualny, obecne osiągnięcia, a w tym temat akustyki podwodnej. Nazwa „hydroakustyka” lub „akustyka podwodna” określa się obszar nauki i techniki zajmującą się pozyskiwaniem i przekazywaniem informacji w środowisku wodnym...
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Charge density wave and large nonsaturating magnetoresistance in YNiC2 and LuNiC2
PublicationWe report a study of physical properties of two quasi-low-dimensional metals YNiC2 and LuNiC2 including the investigation of transport, magnetotransport, galvanomagnetic, and specific heat properties. In YNiC2 we reveal two subsequent transitions associated with the formation of weakly coupled charge density wave at TCDW=318K and its locking in with the lattice at T1=275K. These characteristic temperatures follow the previously...
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Underwater Navigation System Based on Doppler Shifts of a Continuous Wave
PublicationThe paper describes a concept of an underwater navigation system designed to determine the location and speed of its ROVs or divers. Conducted by the Department of Marine Electronic Systems at the Gdansk University of Technology for several years, research has focused on navigation systems which determine positions on the basis of Doppler shifts of echo signals reflected from a moving object. This article presents a different version...
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Analiza właściwości sonaru z falą ciągłą i modulacją kodową
PublicationSonary z falą ciągłą, w odróżnieniu od sonarów impulsowych, mogą być wykorzystywane do quasi ciągłej obserwacji celów oraz jako ciche sonary trudno wykrywalne przez obce systemy nasłuchu (sonary przechwytujące). W sonarach z falą ciągłą stosowana jest zwykle liniowa modulacja częstotliwości, której negatywnym skutkiem są błędy oceny odległości celów, spowodowane efektem Dopplera. W celu ich redukcji autorzy zaproponowali użycie...
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Data fusion of GPS sensors using Particle Kalman Filter for ship dynamic positioning system
PublicationDepending on standards and class, dynamically positioned ships make use of different numbers of redundant sensors to determine current ship position. The paper presents a multi-sensor data fusion algorithm for the dynamic positioning system which allows it to record the proper signal from a number of sensors (GPS receivers). In the research, the Particle Kalman Filter with data fusion was used to estimate the position of the vessel....
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Designing Particle Kalman Filter for Dynamic Positioning
PublicationThe article presents a comparative analysis of two variants of the Particle Kalman Filter designed by using two different ship motion models. The first filter bases only on the kinematic model of the ship and can be used in many types of vehicles, regardless of the vehicle dynamics model. The input value to the filter is the noisy position of the ship. The second filter makes use of the kinematic and dynamic models of the moving...
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Can Historic Interiors with Large Cubature be Turned Acoustically Correct?
PublicationHistoric interiors with large cubature, such as reception, theatrical, and concert halls, need to be renovated periodically if they are to be preserved as cultural heritage for future generations. In such cases it is necessary to maintain appropriate balance between requirements imposed by heritage conservation authorities office which are usually being given a higher priority, applicable safety regulations, and the comfort of...
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Continuous wave sonar with hyperbolic frequency modulation keyed by pseudo-random sequence
PublicationA CW FM type sounding signal is used in the classical solution of silent sonar. While the signal provides a relatively simple implementation of digital signal processing, and ensures good detection conditions, unfortunately, in the presence of the Doppler effect, distance measurement results tend to be wrong. This is due to the fact that the received signal’s instantaneous frequency value is dependent both on the distance to the...
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Web Based Application for Probability Job Scheduling
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Determination of the Content of Promoters in Magnetite and Wustite Phases in the Fused Iron Catalyst
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Analysis of data fusion algorithms for the vessel with the dynamic positioning system
PublicationThe dynamic positioning (DP) system on the vessel is operated to control the position and heading of the vessel with the use of propellers and thrusters installed on the board. On DP vessels redundant measurement systems of position, heading and the magnitude and direction of environmental forces are required for safety at sea. In this case, a fusion of data is needed from individual measurement devices. The article proposes a...
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Novel staphylococci nucH taxonomical marker used in identification of human-associated Staphylococcus succinus subsp. casei
PublicationThe aim of our study was to assess the sequencing of unique nucH gene fragment based on performed bioinformatics analysis as a novel diagnostic method for the identification of difficult to identify staphylococcal human pathogenic strains. Initially, PCR-RFLP-rrn analysis specific to the spacers between 16SrDNA and 23SrDNA followed by HhaI restriction analysis was performed. Further, sequencing of nucH and 16S rDNA genes fragments...
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Numerical Model of Surface and Quasi-Spherical Sea Noise and Its Application to Analysis of DIFAR Systems
PublicationVarious types of passive sonar systems are used to detect submarines. These activities are complex and demanding. Therefore, computer simulations are most often used at the design stage of these systems. For this reason, it is also necessary to simulate the acoustic ambient noise of the sea. The article proposes a new numerical model of surface and quasi-spherical sea noise and presents its statistical parameters. The results of...
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Application of Traction Supply System for Charging Electric Cars
PublicationThe development of electromobility involves the development of electric cars charging infrastructure. The increase of the number of chargers poses new demands for the AC power grid, especially in regard to its capacity of delivering high peak power. As an alternative for the public AC power grid, urban electrified transportation systems (trams, trolleybuses, and metro) can be used for supplying electric cars chargers. The article...
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Correlation between charge density waves and antiferromagnetism in Nd1−xGdxNiC2 solid solutions
PublicationWe report a study on the evolution of a charge density wave and antiferromagnetism in the series of the polycrystalline solid solution Nd1−xGdxNiC2 (0 _ x _ 1) by means of magnetic and transport properties measurements. The experimental results reveal the violation of the de Gennes law and a strong correlation between the Peierls, Néel, and Curie-Weiss temperatures, which strongly suggests a cooperative interaction between the...
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Impact of Spatial Noise Correlation on Bearing Accuracy in DIFAR Systems
PublicationDIFAR type underwater passive systems are one of the more commonly used tools for detecting submarines. At the design stage, which usually uses computer simulations, it is necessary to generate acoustic noise of the sea. It has been shown that correlating noise significantly reduces these errors compared to the assumption that noise is uncorrelated. In addition, bearing errors have been shown to be the same in systems with a commonly...
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Enhanced Mobility and Large Linear Nonsaturating Magnetoresistance in the Magnetically Ordered States of TmNiC2
PublicationWe have studied the magnetic, magnetotransport, and galvanomagnetic properties of TmNiC2. We find that the antiferromagnetic and field induced metamagnetic and ferromagnetic orderings do not suppress the charge density wave. The persistence of Fermi surface pockets, open as a result of imperfect nesting accompanying the Peierls transition, results in an electronic carriers mobility of the order of 4 × 103 cm2 V−1 s−1 in ferromagnetic...
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Frame sawing machines for accurate wood re-sawing
PublicationPrzedstawiono zwięzłą historię pilarek ramowych. Zaprezentowano ekologiczne i ekonomiczne zalety pilarek ramowych nowej generacji. Opisano podstawowe cechy układów kinematycznych nowoczesnych pilarek ramowych oraz podano ich podstawowe dane techniczne.
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A model of combined heat and power generating plant with urban heat distribution network for production scheduling
PublicationPoruszono zagadnienie związane z pracowaniem harmonogramu produkcji elektrociepłowni. Uwzględniony został wpływ zachowania się miejskiej sieci ciepłowniczej na pracę elektrociepłowni. Możliwe jest również modelowanie współpracy ze zbiornikiem ciepła.
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Nieniszcząca i szybka metoda oceny stanu wykładzin gumowych w instalacjach oczyszczania spalin
PublicationPrzedstawiono podstawy nowoopracowanej metody oceny stopnia penetracji gumy przez agresywne środowisko korozyjne występujące w absorberach instalacji odsiarczania spalin. Nowa metodyka ma zastąpić w przyszłości badania niszczące powłok. Pierwsze doświadczenia uzyskane przy sprawdzaniu nowej metodyki w warunkach rzeczywistej pracy absorberów instalacji odsiarczania spalin pozwalają na określenie miejsc szczególnie zagrożonych na...
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Effect of contactless hybrid current limiter on voltage dips in power system
PublicationW referacie przedstawiono działanie hybrydowego niskonapięciowego ogranicznika prądu zwarciowego, składającego się z ultraszybkiego bezpiecznika, tranzystora mocy i warystora. W szczególności omówiono możliwości polepszenia jakości dostarczanej do odbiorców energii elektrycznej. Zastosowanie hybrydowego ogranicznika prądu znacznie ogranicza czasy trwania zapadów napięcia w systemie elektroenergetycznym. Obliczenia wykonano przy...