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    Tytuł:
    Identification of unmeasured variables in the set of model constraints of the data reconciliation in a power unit
    Autorzy:
    Szega, M.
    Nowak, G. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/240163.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mathematical modeling
    empirical characteristics
    data reconciliation
    modelowanie matematyczne
    charakterystyka empiryczna
    rachunek wyrównawczy
    Opis:
    In generalized method of data reconciliation as equations of conditions beside substance and energy balances can be used equations which don't have precisely the status of conservation lows. Empirical coefficients in these equations are traded as unknowns' values. To this kind of equations, in application of the generalized method of data reconciliation in supercritical power unit, can be classified: steam flow capacity of a turbine for a group of stages, adiabatic internal efficiency of group of stages, equations for pressure drop in pipelines and equations for heat transfer in regeneration heat exchangers. Mathematical model of a power unit was developed in the code Thermoflex. Using this model the off-design calculation has been made in several points of loads for the power unit. Using these calculations identification of unknown values and empirical coefficients for generalized method of data reconciliation used in power unit has been made. Additional equations of conditions will be used in the generalized method of data reconciliation which will be used in optimization of measurement placement in redundant measurement system in power unit for new control systems.
    Źródło:
    Archives of Thermodynamics; 2013, 34, 4; 235-245
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic radiation of vibrating plate structures submerged in water
    Autorzy:
    Nowak, Ł.
    Zieliński, T. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/331890.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Opis:
    The paper presents results of the theoretical and numerical investigation on acoustic radiation of vibrating plate structures submerged in water. The current state of the art on the considered issues is briefly reviewed. Then, the method for determining eigenmode shape functions and eigenfrequencies of plate vibrating in water that has been used in presented study is introduced. The constitutive equations for solid domain and the pressure acoustic equation for liquid domain are coupled via boundary conditions and solved numerically using the finite element method. Structural mode shapes and eigenfrequencies computed for plate submerged in water are compared to analogous results obtained for air and for the in vacuo case. It is assumed, that the plate is rectangle shaped and that it is placed in an infinite rigid baffle. Three-dimensional near- and far-field acoustic radiation characteristics for the plate vibrating in water are introduced. Possibilities of implementation of the active control system for reduction of the hydroacoustic emission are briefly discussed.
    Źródło:
    Hydroacoustics; 2012, 15; 163-170
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizing data transmission in communication systems which use magnetic couplings
    Optymalizacja transmisji danych w systemach łączności wykorzystujących „sprzężenia magnetyczne”
    Autorzy:
    Jackiewicz, T.
    Nowak, R.
    Wiśniewski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1361932.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    optymalizacja transmisji danych
    sprzężenia magnetyczne
    propagacja fal elektromagnetycznych
    propagacja sygnału w szybie kopalnianym
    górniczy system łączności
    optimizing data transmission
    magnetic couplings
    propagation of electromagnetic waves
    signal propagation in a shaft
    mining communication system
    Opis:
    Communication systems which make use of magnetic couplings are systems in which the transformation of signals is conducted through induction elements. These elements transfer and receive energy from the transportation unit. A good example of such a solution is a shaft communication and signal system which sends a transmission signal through ferromagnetic couplers by means of head ropes or balancing ropes. This type of communication has, undoubtedly, some advantages, such as high reliability and uncomplicated exploitation. Yet, there are some limitations related to the employed bandwidth. The article discusses important issues related to shaft communication and presents methods which allow to make maximum use of available transmission channels.
    Mianem łączności wykorzystującej sprzężenia magnetyczne przyjęto nazywać systemy, w których transformacja sygnału odbywa się poprzez elementy indukcyjne, które przekazują i odbierają energię z ośrodka transportującego. Dobrym przykładem takiego rozwiązania jest system łączności i sygnalizacji szybowej, który poprzez sprzęgacze ferromagnetyczne przesyła za pomocą lin nośnych bądź wyrównawczych sygnał transmisyjny. Tego typu łączność oprócz swych niewątpliwych zalet, jakimi są duża niezawodność i prostota eksploatacji, posiada również swoje ograniczenia związane z zastosowanym pasmem przenoszenia. W artykule przedstawione zostaną rozważania i pokazane metody pozwalające na maksymalne wykorzystanie dostępnych kanałów transmisyjnych.
    Źródło:
    Mining – Informatics, Automation and Electrical Engineering; 2015, 53, 3; 25-30
    2450-7326
    2449-6421
    Pojawia się w:
    Mining – Informatics, Automation and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Active vibroacoustic control of plate structures with arbitrary boundary conditions
    Autorzy:
    Nowak, Ł.
    Zieliński, T. G.
    Meissner, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31343106.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    vibroacoustics
    active control
    plate vibrations
    aktywne sterowanie
    wibroakustyka
    Opis:
    The paper describes briefly some main aspects of the active feedback control system that has been developed and constructed for reduction of vibroacoustic emission of vibrating plate structures with arbitrary boundary conditions. Relations between the forms and frequency of the vibrations induced by an external harmonic excitation and the distribution of the generated acoustic pressure field are investigated using the developed numerical model based on indirect variational boundary element method. The aim of the control system is to minimize the sound pressure level in a given point of the ambient space. The system uses small, rectangle-shaped piezoelectric transducers as both sensors and actuators. The transducers are connected in a number of independent feedback loops, and the feedback gains are the control parameters which are optimized using the developed optimal control algorithm. The constructed active system has been tested for the stability and control performance during experimental research performed in an anechoic chamber. Results of experiments are presented in the paper, proving a high level of noise reduction and a good agreement with numerical predictions.
    Źródło:
    IPPT Reports on Fundamental Technological Research; 2013, 4; 5-9
    2299-3657
    Pojawia się w:
    IPPT Reports on Fundamental Technological Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Pinning of the Fermi Level by Germanium A$\text{}_{1}^{0}\text{}^{/}\text{}^{+}$ Deep Donor State in GaAs Codoped with Ge and Te
    Autorzy:
    Słupiński, T.
    Nowak, G.
    Przybytek, J.
    Stępniewski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929765.pdf
    Data publikacji:
    1993-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.20.Jv
    Opis:
    We present the possibility of GaAs:Ge,Te crystals growth from the melt (liquid encapsulated Czochralski method) with partially occupied, at ambient pressure, the A$\text{}_{1}$ localized electronic state of Ge$\text{}_{Ga}$ impurity. In as-grown crystals the amphotericity of Ge and creation of defects (deep acceptor complexes, precipitates etc.) during cooling after growth limit the free electron concentration below the value necessary to populate the A$\text{}_{1}^{0}\text{}^{/}\text{}^{+}$ level. Special annealing of the samples, which enlarges the free electron concentration, was used. The occupation of A$\text{}_{1}^{0}\text{}^{/}\text{}^{+}$ level, at ambient pressure, was observed by pressure dependent Hall effect measurements.
    Źródło:
    Acta Physica Polonica A; 1993, 84, 4; 807-811
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composite zones produced in situ in the Ni3Al phase
    Autorzy:
    Olejnik, E.
    Janas, A.
    Sikora, G.
    Tokarski, T.
    Nowak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/379777.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    composite layer
    Ni3Al
    cast intermetallic
    in situ
    synthesis TiC carbides
    warstwa kompozytowa
    węglik TiC
    Opis:
    The study presents the results of research on the development of composite zones in castings based on the intermetallic phase of Ni3Al. Composite zones were obtained by placing packets with substrates for the reaction of titanium carbide in a foundry mould. To provide a variable carbides content in the composite zone, two compositions of the packets were prepared. The first packet contained only substrates for the reaction of TiC synthesis; the second one also contained a filler. The resulting composite zones in castings were examined for the filler effect on changes in the volume fraction, size and morphology of carbides in the zone. In addition, the effect of filler on the mechanical properties of the zone was verified, observing changes of Vickers hardness in this area. It was found that the presence of filler in the composition of the packet for synthesis reduced the content of carbides, as well as their size and morphology. Lower surface content of carbides reduced hardness of the zone, which enabled smooth control of the mechanical properties. At the same time, the use of the selected filler did not disturb the course of the TiC carbide synthesis.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1; 107-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the Complex Event Processing system for anomaly detection and network monitoring
    Autorzy:
    Frankowski, G.
    Jerzak, M.
    Miłostan, M.
    Nowak, T.
    Pawłowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/305323.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    network monitoring
    intrusion detection
    anomaly detection
    complex event processing
    Opis:
    Protection of infrastructures for e-science, including grid environments and NREN facilities, requires the use of novel techniques for anomaly detection and network monitoring. The aim is to raise situational awareness and provide early warning capabilities. The main operational problem that most network operators face is integrating and processing data from multiple sensors and systems placed at critical points of the infrastructure. From a scientific point of view, there is a need for the efficient analysis of large data volumes and automatic reasoning while minimizing detection errors. In this article, we describe two approaches to Complex Event Processing used for network monitoring and anomaly detection and introduce the ongoing SECOR project (Sensor Data Correlation Engine for Attack Detection and Support of Decision Process), supported by examples and test results. The aim is to develop methodology that allows for the construction of next-generation IDS systems with artificial intelligence, capable of performing signature-less intrusion detection.
    Źródło:
    Computer Science; 2015, 16 (4); 351-371
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic absorption of a new class of alumina foams with various high-porosity levels
    Autorzy:
    Zieliński, T. G.
    Potoczek, M.
    Śliwa, R. E.
    Nowak, Ł. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/177924.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sound absorption
    porous materials
    alumina foam
    Opis:
    Recently, a new class of ceramic foams with porosity levels up to 90% has been developed as a result of the association of the gelcasting process and aeration of the ceramic suspension. This paper presents and discusses original results advertising sound absorbing capabilities of such foams. The authors man- ufactured three types of alumina foams in order to investigate three porosity levels, namely: 72, 88, and 90%. The microstructure of foams was examined and typical dimensions and average sizes of cells (pores) and cell-linking windows were found for each porosity case. Then, the acoustic absorption coefficient was measured in a wide frequency range for several samples of various thickness cut out from the foams. The results were discussed and compared with the acoustic absorption of typical polyurethane foams proving that the alumina foams with high porosity of 88-90% have excellent sound absorbing properties competitive with the quality of sound absorbing PU foams of higher porosity.
    Źródło:
    Archives of Acoustics; 2013, 38, 4; 495-502
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Alanine dosimetry of 60 MeV proton beam - preliminary results
    Autorzy:
    Michalec, B.
    Mierzwińska, G.
    Sowa, U.
    Ptaszkiewicz, M.
    Nowak, T.
    Swakoń, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146730.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    alanine
    dosimetry
    electron paramagnetic resonance (EPR)
    proton beam
    Opis:
    Electron paramagnetic resonance (EPR) spectrometry (X-band) was used to determine the dose absorbed in alanine detectors, of different shapes and different alanine content, irradiated with Co-60 gamma rays and in a 60 MeV proton beam. The goal of our study was to confirm applicability of alanine as a passive detector in therapeutic proton beam. In the paper dose response characteristic and relative efficiency of alanine are shown. The study confirmed that alanine detectors with a high alanine content (ca. 95%) may be a useful and convenient tool for dose measurements in proton beams, used for eye cancer treatment.
    Źródło:
    Nukleonika; 2012, 57, 4; 503-506
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dosimetric characteristics of active solid state detectors in a 60 MeV proton radiotherapy beam
    Autorzy:
    Sowa, U.
    Nowak, T.
    Michalec, B.
    Mierzwińska, G.
    Swakoń, J.
    Olko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/146780.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    diamond dosimeter
    diode Si
    dosimetry
    proton beam
    Opis:
    Several solid state detectors, such as dosimetric diodes, MOSFET detectors or diamond detectors are used for quality control of radiotherapy beams. The goal of this work was to determine dosimetric properties of the PTW diamond detector (DD) and the PTW silicon diode in the 60 MeV therapeutic beam (practical range in water Rp = 29.17 mm) located at the Institute of Nuclear Physics, Polish Academy of Sciences (IFJ PAN, Kraków). A PTW Markus ionization chamber was used as a reference device. The empirical correction factor for diamond detector, kDD(Rresidual), introduced in the Technical Report Series of IAEA, TRS-398 [9] as a function of beam quality, Rresidual, was found to decrease from 1.12 for Rresidual = 1.5 mm to 1.04 for Rresidual = 26 mm. The reproducibility of response of DD and PTW diodes in the proton filed did not exceed 0.11%. Our results show that diamond detectors and dosimetric diodes are useful tools for quality assurance (QA) of therapeutic proton beam, but each type of detectors has specific properties which should be taken into account when choosing particular application.
    Źródło:
    Nukleonika; 2012, 57, 4; 491-495
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of human fall episodes based on coordinates of body tags and numerical differentiation
    Autorzy:
    Momot, M.
    Momot, A.
    Nowak, G.
    Seredynski, R.
    Jezewski, J.
    Kupka, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/333630.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    otoczenie
    wspieranie życia
    dane nieregularne objęte próbą
    zróżniczkowanie numeryczne
    ambient
    assisted living
    fall detection
    irregular sampled data
    numerical differentiation
    Opis:
    This paper presents a new method for detection of changes in alignment of the human body, particularly the fall, on the basis of signals acquired from the position sensors placed on the body of the monitored person. The sensors are located on the cuffs, waist and chest. Transformation of data sequence collected from sensors is proposed in order to best distinguish between the collapse from the normal movement. It is based on nonlinear combination of the first two derivatives of the signals being read. Because data from the sensors is sent asynchronously, a numerical algorithm for unevenly sampled data differentiation is proposed. Derivative values are calculated in equidistant nodes through differentiation of a polynomial, which is adjusted by minimizing the mean square error. The developed method can be used in home care telemedicine systems, where it is necessary to long term monitor of multiple vital parameters of people under care.
    Źródło:
    Journal of Medical Informatics & Technologies; 2012, 21; 11-17
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Oxygen Staging on Nitrogen Conversion in Oxy-Fuel CFB Environment
    Autorzy:
    Jankowska, S.
    Czakiert, T.
    Krawczyk, G.
    Borecki, P.
    Jesionowski, Ł.
    Nowak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/185424.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    paliwo tlenowe
    CFB
    oxy-fuel
    fuel-N
    Opis:
    This paper presents a study on nitrogen conversion in oxy-fuel coal combustion in a pilot scale CFB 0.1 MWth facility. The paper is focused on fuel-N behaviour in the combustion chamber when the combustion process is accomplished under oxy-fuel CFB conditions. The analysis is based on infurnace sampling of flue gas and calculations of the conversion ratios of fuel-nitrogen (fuel-N) to NO, NO2, N2O, NH3 and HCN. For the tests, O2/CO2 mixtures with the oxygen content of 21 vol.% (primary gas) and with the oxygen content varied from 21 to 35 vol.% (secondary gas), were used as the fluidising gas. Measurements were carried out in 4 control points located along the combustion chamber: 0.43 m, 1.45 m, 2.50 m and 4.88 m. Results presented below indicate that an increased oxygen concentration in the higher part of the combustion chamber has strong influence on the behaviour of fuel based nitrogen compounds.
    Źródło:
    Chemical and Process Engineering; 2014, 35, 4; 489-496
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heracleum sosnowskyi Manden
    Autorzy:
    Jakubowicz, O.
    Zaba, Cz.
    Nowak, G.
    Jarmuda, S.
    Zaba, K.
    Marcinkowski, J.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/49941.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    Heracleum Sosnowskyi was discovered in 1772 and described as a separate species in 1944 by I. P. Mandenova. Its name is derived from the surname of a botanist studying Caucasian flora, Prof. D.I. Sosnowski. In the area of the Caucasus foothills, the plant reaches approximately 1-1,5 m in height, whereas in Poland its size is significantly larger, up to 3-3.5 m. Heracleum blooms from mid-June to the end of July. The flowers are arranged in umbels and last for 2-3 weeks. In Central Europe, the species colonizes mostly neglected green areas, ruins and riversides. Heracleum poses a serious threat to the human population due to its photoallergic properties, resulting from the presence of intensely toxic furanocoumarin in its sap. Furanocoumarins are found in small hairs that cover the leaves and stem, and are the components of the essential oil. They may penetrate the skin through the epithelial layer, posing a direct threat to human health. Contact with the plant, followed by sun exposure, may lead to the development of large blisters and symptoms of burns. Heracleum, in the event of consumption, is also harmful to farm animals, causing, among others, internal bleeding and diarrhea. Although the toxic properties of Heracleum have been known for many years, every summer people who had contact with the plant present at physicians of different medical specialties.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2012, 19, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Highly Compensated GaAs Crystal Obtained by Molecular CO Doping
    Autorzy:
    Bożek, R.
    Korona, K. P.
    Nowak, G.
    Wasik, D.
    Słupiński, T.
    Kaczor, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929707.pdf
    Data publikacji:
    1993-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.55.-i
    78.55.-m
    78.20.Jq
    Opis:
    GaAs:C crystal was grown by liquid encapsulated Czochralski technique with large partial pressure of CO in ambient atmosphere p$\text{}_{CO}$/p$\text{}_{tot}$ = 0.2 and investigated using near and infrared absorption, photoluminescence, photoconductivity, photo-induced current transient spectroscopy and photo-Hall measurements. High resistivity of the crystal was found in electrical measurements (10$\text{}^{7}$ Ω cm, the Fermi level at 0.67 eV below conduction band at 300 K). Local vibrational mode revealed increased concentration of carbon acceptor and presence of oxygen related complexes. Photoluminescence spectra were dominated by two bands with peak energies at 1.49 eV and 0.8 eV. The near band gap emission shifts with excitation intensity up to 4 meV/decade. In photocurrent spectrum a strong photoionization band with E = 0.55 eV is observed.
    Źródło:
    Acta Physica Polonica A; 1993, 84, 4; 669-672
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical properties and texture of gluten-free snacks supplemented with selected fruit additions
    Autorzy:
    Wójtowicz, A.
    Lisiecka, K.
    Mitrus, M.
    Nowak, G.
    Golian, M.
    Oniszczuk, A.
    Kasprzak, K.
    Widelska, G.
    Oniszczuk, T.
    Combrzyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082641.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    corn snacks
    chokeberry
    elderberry
    strawberries
    texture
    Opis:
    Extrusion-cooking is used to produce directly expanded gluten-free snacks, especially for consumers with celiac disease. The aim of the study was to evaluate the effect of various fruits type supplementation as well as the processing screw speed on the physical properties and texture of ready-toeat corn-based gluten-free snacks. Black elderberry, chokeberry and strawberry were dried and used in the amount of 5 to 20% as a corn grit replacement. The directly expanded snacks were processed with a single-screw extruder at various screw speeds (80 and 120 rpm) and tested to measure their expansion ratio, bulk density, colour profile as well as their texture profile. The results showed the various effects of adding different types and amounts of fruit on the physical properties and texture of supplemented gluten-free snacks. A higher amount of fruit resulted in a significant decrease in the expansion ratio and an increase in the bulk density of the snacks. Reduced lightness and a more pronounced red tint were observed when red fruits were added. The desired hardness of the snacks suggested that the addition of fruit should be retained below 15% of the recipe content. The screw speeds applied showed a significant effect on the expansion, bulk density and texture of the tested snacks.
    Źródło:
    International Agrophysics; 2019, 33, 4; 407-416
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of invasive Fallopia taxa on resident plant species in two river valleys (southern Poland)
    Autorzy:
    Chmura, D.
    Tokarska-Guzik, B.
    Nowak, T.
    Wozniak, G.
    Bzdega, K.
    Koszela, K.
    Gancarek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/58507.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    invasive species
    biological invasion
    Fallopia
    plant species
    river valley
    vegetation
    phenology
    Polska
    Opis:
    Riparian zones in two rivers in southern Poland were studied in terms of species composition and soil parameters in patches dominated by three knotweed taxa (Fallopia japonica, F. sachalinensis and the hybrid F. ×bohemica). The main purpose was to detect any differences in species diversity, environmental conditions and in the impact of the three Fallopia spp. on resident species. Fieldwork was conducted in spring and summer in 30 invaded plots (in total 90 subplots). It was demonstrated that vegetation dominated by particular knotweed taxa differed in response to soil pH and ammonium, nitrate, and magnesium content. Fallopia spp. (living plants and necromass) had a stronger negative impact on the cover and species diversity of the resident species in summer in comparison with spring. Vegetation patches differed significantly in species composition in relation to the knotweed taxa present. These differences may be the consequence of the differentiated biotopic requirements of Fallopia taxa and the coexisting plants, or to the different impact of the knotweed taxa on the resident species.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Single-Photon Emission from a Highly Excited CdTe Quantum Dot
    Autorzy:
    Nowak, S.
    Goryca, M.
    Kazimierczuk, T.
    Gaj, J.
    Golnik, A.
    Kossacki, P.
    Wojnar, P.
    Karczewski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811969.pdf
    Data publikacji:
    2008-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.21.La
    78.55.Et
    78.67.-n
    78.47.-p
    Opis:
    Time-resolved correlation measurements were performed to examine the statistics of photon emission from a single quantum dot at high excitation levels. The range of strong powers was determined by the saturation of intensity of excitonic lines. The significant contribution of pulsed background luminescence forced us to sophisticated analysis of the photoluminescence spectra. For quantum dots grown in the Stranski-Krastanov mode, one-photon emission was found to a good approximation. Fluctuation type quantum dots exhibit a significant level of multiphoton emission.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 5; 1273-1278
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determinants of primary healthcare patients’ dissatisfaction with the quality of provided medical services
    Autorzy:
    Strzelecka, A.
    Stachura, M.
    Wójcik, T.
    Kordyzon, M.
    Chmielewski, J.P.
    Florek-Łuszczki, M.
    Nowak-Starz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/28762841.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2021, 28, 1; 142-148
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using affinity analysis in diagnosing the needs of patients as regards e-Health
    Autorzy:
    Strzelecka, A.
    Stachura, M.
    Wójcik, T.
    Pacian, A.B.
    Kulik, T.
    Pacian, J.
    Kaczoruk, M.
    Galińska, E.M.
    Kawiak-Jawor, E.
    Nowak-Starz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086058.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    patient
    primary health care
    e-health
    affinity analysis
    Opis:
    Introduction. E-Health tools allow a medical facility to set a given patient’s data in order using ICT techniques, and the patient to use those techniques when contacting a given organisation. Materials and method. Secondary statistical data was used in the research. The study was carried out among primary health care patients. Mining for affinity rules was done in the R programme. The apriori and inspect functions from the arules package were used. Moreover, any redundant rules were removed from thoseobtained using the afero-mentioned method. Applying the general description of the affinity analysis method onto the survey described herein, it should be stressed that the aim of using affinity analysis was to discover the rules which contain the sub-transaction B={V_6=1} as a consequent. This was determined by the intention to discover associations regarding the knowledge about a uniform information system that the patients under study might have. Results. In the discovered rules, the antecedent most often contained an indication of the need for introducing a uniform solution as regards telemedicine. Moreover, according to the opinions of ‚conscious‘patients, a uniform IT system should improve the work at primary health care institutions, introducing an on-line booking system for visits should improve the productivity and comfort of doctors, and an IT system should provide unambiguous identification of a patient. Conclusions. There is potential in using affinity analysis within e-Health. The example of affinity analysis described in his study led to the discovery of interesting and important (from the point of view of a medical facility) regularities regarding the knowledge and expectations of patients as regards e-Health.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 435-441
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Różnorodność genetyczna tatrzańskiej populacji wilka Canis lupus
    Genetic diversity in wolf Canis lupus population in Tatra Mountains
    Autorzy:
    Myslajek, R.W.
    Szewczyk, M.
    Zwijacz-Kozica, T.
    Niedzwiecka, N.
    Rabiasz, J.
    Chovancova, G.
    Feriancova, E.
    Figura, M.
    Nowak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/881438.pdf
    Data publikacji:
    2019
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
    Tematy:
    Tatry
    drapiezniki
    wilk
    Canis lupus
    populacje zwierzat
    populacje transgraniczne
    roznorodnosc genetyczna
    Źródło:
    Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2019, 21, 2[59]
    1509-1414
    Pojawia się w:
    Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of the Verwey Transition in Magnetite
    Autorzy:
    Tarnawski, Z.
    Wiecheć, A.
    Madej, M.
    Nowak, D.
    Owoc, D.
    Król, G.
    Kąkol, Z.
    Kolwicz-Chodak, L.
    KozŁowski, A.
    Dawid, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041527.pdf
    Data publikacji:
    2004-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.18.Bn
    75.40.-s
    71.20.Lp
    Opis:
    Studies of the specific heat and simultaneous AC magnetic susceptibility (ρ') and electric resistance of stoichiometric magnetite single crystal are presented. The temperature hysteresis of the Verwey transition is of 0.03 K found from the specific heat data confirming its first-order character. The continuous temporal change of ρ' at T$\text{}_{V}$ can be switched off by an external magnetic field without affecting the transition. The electrical resistance decreases continuously with increasing temperature with a rapid change of slope at the point when the phase transition is completed. It was concluded that the magnetic degrees of freedom do not actively participate in the transition and that the entropy released at T$\text{}_{V}$ may come from ordering electrons.
    Źródło:
    Acta Physica Polonica A; 2004, 106, 5; 771-775
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metastatic and non-metastatic sentinel inguinofemoral lymph nodes in vulvar cancer show an increased lymphangiogenesis
    Autorzy:
    Piechowicz, M.
    Mikos, M.
    Banas, T.
    Okon, K.
    Pietrus, M.
    Balajewicz-Nowak, M.
    Szczudlik, L.
    Kojs, Z.
    Czerw, A.
    Juszczyk, G.
    Pityński, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085422.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    anti-D2–40 antibody
    lymphatic vessel density
    immunohistochemistry
    sentinel lymph node
    vulvar cancer
    Opis:
    Introduction and objective. Lymph node involvement is a strong predictor of disease recurrence and patient survival in vulvar cancer. The aim of the study was to evaluate the feasibility of sentinel lymph node (SLN) screening, the incidence of skip metastases, and lymph node lymphangiogenesis. Materials and method. Fifty-five patients participated in this prospective, single centre study. A double SLN screening method was employed using radiocolloid (technetium-99 sulfur colloid) and 1.0% Isosulfan Blue. Immunohistochemistry, using a mouse monoclonal antibody against D2–40, was used to evaluate lymphatic vessel density (LVD). All calculations were performed using STATISTICA software v. 10 (StatSoft, USA, 2011); p<0.05 was considered significant. Results. Using both methods of SLN detection, 100% accuracy was achieved, and skip metastases were diagnosed in only one woman (1.82%). Peri-tumour median LVD was significantly increased compared with matched intra-tumour samples (p<0.001), while median LVD was significantly lower in negative, compared with positive SLN, regardless of whether matched non-SLN were negative (p<0.001) or positive (p=0.005). Metastatic SLN exhibited significantly higher median LVD compared with matched negative non-SLN (p=0.015), while no significant difference in median LVD was detected between positive SLN and matched positive non-SLN. However, negative SLN had a significantly higher median LVD compared with matched negative non-SLN (p = 0.012). Conclusions. SLN detection is a safe and feasible procedure in vulvar cancer. In patients without nodular involvement, SLN, compared with non-SLN, exhibited significantly higher median LVD, which may be an indication of its preparation to host metastases, and thus requires further investigation.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 123-128
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Koncepcja i badania nad bezciężarowym urządzeniem naprężającym trakcji kolejowej
    The concept and research of replacing the classical gravitational tensioning devices for railway traction network modern, compact devices with no loads
    Autorzy:
    Knych, T.
    Mamala, A.
    Kwaśniewski, P.
    Kiesiewicz, G.
    Nowak, A.
    Ściężor, W.
    Kowal, R.
    Kordaszewski, S.
    Franczak, K.
    Bogacki, A.
    Greguła, R.
    Błędowski, L.
    Dondziak, K.
    Rojek, A.
    Majewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/253082.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy TTS
    Tematy:
    trakcja kolejowa
    bezciężarowe urządzenie naprężające
    compact devices with no loads
    tensioning device
    railway traction
    railway
    TUN
    Opis:
    W artykule zaproponowano koncepcję zastąpienia klasycznych grawitacyjnych urządzeń naprężających sieć trakcyjną nowoczesnymi, kompaktowymi urządzeniami bezciężarowymi. Przedstawiono ewolucję sprężynowych urządzeń naprężających do zastosowań w sieciach trakcji kolejowej oraz metodologię i wyniki badań niezbędnych do opracowania działającego prototypu. W toku przedstawionych badań skonstruowano i wdrożono prototyp bezciężarowego urządzenia naprężającego sieć trakcyjną. Zbudowane urządzenie pozwala na regulowanie siły naciągu sieci w zakresie do 30 kN oraz na kompensację jej wydłużenia w zakresie powyżej 800 mm.
    The article presents the concept of replacing the classical gravitational tensioning devices for railway traction network modern, compact devices with no loads. There was shown evo¬lution of spring tensioning devices for use in railway traction networks and the methodology and results of the researches which are necessary to develop a working prototype. During of this research the prototype of the spring tensioning device rail network was designed and implemented. Built device allows to adjust the tension in the network of up to 30 kN and a compen¬sation of extending the range of above 800 mm.
    Źródło:
    TTS Technika Transportu Szynowego; 2016, 5; 37-42
    1232-3829
    2543-5728
    Pojawia się w:
    TTS Technika Transportu Szynowego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strefy perspektywiczne występowania niekonwencjonalnych złóż węglowodorów w kambryjskich, ordowickich, sylurskich i karbońskich kompleksach skalnych Polski : integracja wyników badań
    Prospective zones for unconventional hydrocarbon resources in Cambrian, Ordovician, Silurian and Carboniferous rocks of Poland : integration of the research results
    Autorzy:
    Podhalańska, T.
    Waksmundzka, M. I.
    Becker, A.
    Roszkowska-Remin, J.
    Dyrka, I.
    Feldman-Olszewska, A.
    Głuszyński, A.
    Grotek, I.
    Janas, M.
    Karcz, P.
    Nowak, G.
    Pacześna, J.
    Roman, M.
    Sikorska-Jaworowska, M.
    Kuberska, M.
    Kozłowska, A.
    Sobień, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075500.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    niekonwencjonalne złoża węglowodorów
    strefa perspektywiczna
    dolny paleozoik
    karbon
    basen bałtycko-podlasko-lubelski
    zagłębie SW Poland
    unconventional hydrocarbon resources
    prospective zones
    lower Palaeozoic
    Carboniferous
    Baltic-Podlasie-Lublin basin
    Carboniferous basin of SW Poland
    Opis:
    The paper presents the characteristics of prospective zones identified for the first time within the lower Palaeozoic shale formations occurring in the Baltic-Podlasie-Lublin Basin and within the Carboniferous shale, sandstone, and mixed shale-sandstone complexes (the so-called hybrid complexes) in the basin of south-western Poland. The lateral and vertical ranges of these zones are determined based on specific criteria using the results of various research methods and analyses, i.e.: stratigraphic, sedimentological, mineralogical, petrological and geochemical of organic matter, petrographic and petrophysical, including interpretation of well logs. Archived geological materials and those coming from the boreholes drilled recently in the concession areas were also used. Four prospective zones have been distinguished in the lower Palaeozoic of the so-called shale belt: SP1, SP2, SP3 and SP4. The most prospective area for the occurrence of unconventional hydrocarbon deposits in shale formations is the Baltic region – the Łeba Elevation, where there are all four perspective zones, only partially covering the range of potentially prospective formations. In each of these zones, both liquid and gas hydrocarbons can be expected in this area. Due to the low percentage of organic matter, the lowest hydrocarbon generation potential is attributed to the Lublin region. However, the low values of this parameter are compensated by other parameters, i.e. the considerable thickness and lateral extent of zone SP4 corresponding partly to the Pelplin Formation. In the Carboniferous rocks of south-western Poland, seven prospective zones have been distinguished in four borehole sections. Four of them are “tight” zones in compact sandstones, while the other three zones represent a hybrid type in complexes with mixed lithology. No prospective zones have been defined in complexes with homogeneous shale lithologies. Determination of lateral extents of the identified zones has not been possible due to the scarcity of data on the geological structure and stratigraphy of the Carboniferous succession in the study area
    Źródło:
    Przegląd Geologiczny; 2016, 64, 12; 1008--1021
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Blue Laser on High N$\text{}_{2}$ Pressure-Grown Bulk GaN
    Autorzy:
    Grzegory, I.
    Boćkowski, M.
    Krukowski, S.
    Łucznik, B.
    Wróblewski, M.
    Weyher, J.
    Leszczyński, M.
    Prystawko, P.
    Czernecki, R.
    Lehnert, J.
    Nowak, G.
    Perlin, P.
    Teisseyre, H.
    Purgał, W.
    Krupczyński, W.
    Suski, T.
    Dmowski, L.
    Litwin-Staszewska, E.
    Skierbiszewski, C.
    Łepkowski, S.
    Porowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2030423.pdf
    Data publikacji:
    2001-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Opis:
    In this note we report briefly on the details of pulsed-current operated "blue" laser diode, constructed in our laboratories, which utilizes bulk GaN substrate. As described in Ref. [1] the substrate GaN crystal was grown by HNPSG method, and the laser structure was deposited on the conducting substrate by MOCVD techniques (for the details see Sec. 2 and Sec. 4 of Ref.~[1], respectively).
    Źródło:
    Acta Physica Polonica A; 2001, 100, Supplement; 229-232
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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