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Tytuł:
Surface Magnetostriction within Néels Model
Autorzy:
Żuberek, R.
Żymierska, D.
Szymczak, H.
Powiązania:
https://bibliotekanauki.pl/articles/1930607.pdf
Data publikacji:
1994-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Pd
75.70.Cn
Opis:
The aim of the present paper is to determine the surface magnetostriction in the spirit of Néel's model of the surface magnetic anisotropy. Calculations have been performed for bcc and fcc ferromagnetic crystals.
Źródło:
Acta Physica Polonica A; 1994, 85, 2; 439-442
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical Optimization of a Novel Approach for the Reductive Debenzylation of 2,4,6,8,10,12-Hexabenzyl-2,4,6,8,10,12-hexaazaisowurtzitane Using Pd@SiO2 Nano Catalyst
Autorzy:
Zarandi, M.
Bayat, Y.
Zebardasti, A.
Khayrabadi, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/358766.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
Pd@SiO2
reductive debenzylation
nano
catalyst
Taguchi
Opis:
The synthesis of 2,6,8,12-tetraacetyl-4,10-dibenzyl-2,4,6,8,10,12-hexaazaisowurtzitane (TADB), from 2,4,6,8,10,12-hexabenzyl-2,4,6,8,10,12-hexaazaisowurtzitane(HBIW) is a key step in the preparation of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW or CL-20). In this study, a novel highly efficient nano catalyst based on Pd@SiO2 was used for the reductive debenzylation of HBIW. It is notable that an orthogonal array design OA9 was applied as a statistical optimization method for the synthesis of TADB. The current application of the Taguchi method in optimizing the experimental parameters of the TADB synthetic procedure was successful. TADB was synthesized by investigating the effect of the reaction conditions, such as catalyst percentage, time (h) and temperature (°C). The effects of these factors on the yield of TADB were evaluated quantitavely by the analysis of variance (ANOVA). The Pd@SiO2 nano catalyst, consisting of a palladium core with SiO2 monolayer shells, was synthesized and characterized by SEM, TEM and IR spectroscopy. The optimum condition indicated that the use of fresh Pd@SiO2 nano catalyst provides a high yield (90%). The use of Pd@SiO2 nano catalyst after recovery gave a yield of 65%.
Źródło:
Central European Journal of Energetic Materials; 2017, 14, 4; 984-995
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The algorithm of adaptive determination of amplification of the PD filter estimating object state on the basis of signal measurable on-line
Autorzy:
Kwater, Tadeusz
Hawro, Przemysław
Bartman, Jacek
Mazur, Damian
Powiązania:
https://bibliotekanauki.pl/articles/1409165.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
estimation
Kalman filter
adaptive PD filter
filter amplification
Opis:
The article presents the algorithm that enables adaptive determination of the amplification coefficient in the filter equation provided by Kalman. The method makes use of an estimation error, which was defined for this purpose, and its derivative to determine the direction of correction changes of the gain vector. This eliminates the necessity to solve Riccati equation, which causes reduction of the method computational complexity. The experimental studies carried out using the proposed approach relate to the estimation of state coordinates describing river pollution using the BOD (biochemical oxygen demand) and DO (dissolved oxygen) indicators).The acquired results indicate that the suggested method does better estimations than the Kalman filter. Two indicators were used to measure the quality of estimates: the Root Mean Squared Error (RMSE) and the Mean Percentage Error (MPE).
Źródło:
Archives of Control Sciences; 2021, 31, 1; 129-143
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie fazy sygnałów wnz w diagnostyce stanu izolacji uzwojeń silników elektrycznych
The Use of Phase Signals in the Pd Diagnostics of the Winding Insulation of Electric Motors
Autorzy:
Szymaniec, S.
Powiązania:
https://bibliotekanauki.pl/articles/1368409.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
maszyny elektryczne
izolacja maszyn elektrycznych
sygnał wnz
pomiary wnz
electrical machines
insulation of electrical machines
PD signal
PD measurements
Opis:
Typical damages to the insulation of electrical machines are reflected in the PD signal and differ it in a very characteristic manner depending on the location. The paper presents typical sources of defects in the insulation of electrical machines and the corresponding equivalent circuit diagram and some characteristic features of PD signals. Results of PD measurements for sample motors are presented in the background of supply voltage of the selected phase of motors, deemed as the reference phase. Results of PD measurements are presented for different types of damages to the winding insulation. The usefulness of phase signals in the PD diagnostics of the winding insulation of electric motors is presented.
Typowe uszkodzenia izolacji maszyn elektrycznych znajdują swoje odbicie w sygnale wnz i w charakterystyczny sposób „różnicują go” w zależności od miejsca wystąpienia. W artykule przedstawiono typowe źródła defektów w izolacji maszyn elektrycznych i odpowiadający im schemat zastępczy oraz pewne charakterystyczne cechy sygnałów wnz. Przedstawiono wyniki pomiarów wnz dla przykładowych silników na tle napięcia zasilającego wybranej fazy silników, uznanej za fazę odniesienia. Przedstawiono wyniki pomiarów wnz dla różnego rodzaju uszkodzeń izolacji uzwojeń. Pokazano przydatność fazy sygnałów wnz do diagnostyki stanu izolacji uzwojeń silników elektrycznych.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2013, 2, 99; 49-54
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robotic swarm self-organisation control
Autorzy:
Hendzel, Zenon
Wiech, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/387481.pdf
Data publikacji:
2019
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
swarm robotics self-organization
PD controller
nonholonomic robots
Opis:
This article proposes a new swarm control method using distributed proportional-derivative (PD) control for self-organisation of swarm of nonholonomic robots. Kinematics control with distributed proportional-derivative (DPD) controller enables generation of desired robot trajectory achieving collective behaviour of a robotic swarm such as aggregation and pattern formation. Proposed method is a generalisation of virtual spring-damper control used in swarm self-organisation. The article includes the control algorithm synthesis using the Lyapunov control theory and numeric simulations results.
Źródło:
Acta Mechanica et Automatica; 2019, 13, 2; 130-134
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Motor assessment in Parkinson`s disease
Autorzy:
Opara, Józef A.
Małecki, Andrzej
Małecka, Elżbieta
Socha, Teresa
Powiązania:
https://bibliotekanauki.pl/articles/991125.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
parkinson`s disease
pd
balance
gait
posture
posturometry
Opis:
Parkinson’s disease (PD) is one of most disabling disorders of the central nervous system. The motor symptoms of Parkinson’s disease: shaking, rigidity, slowness of movement, postural instability and difficulty with walking and gait, are difficult to measure. When disease symptoms become more pronounced, the patient experiences difficulties with hand function and walking, and is prone to falls. Baseline motor impairment and cognitive impairment are probable predictors of more rapid motor decline and disability. An additional difficulty is the variability of the symptoms caused by adverse effects of drugs, especially levodopa. Motor assessment of Parkinson`s Disease can be divided into clinimetrics, assessment of balance and posture, arm and hand function, and gait/walking. These are many clinimetric scales used in Parkinson`s Disease, the most popular being the Hoehn and Yahr stages of progression of the disease and Unified Parkinson’s Disease Rating Scale. Balance and posture can be assessed by clinimetric scales like the Berg BS, Tinetti, Brunel BA, and Timed Up and Go Test, or measured by posturometric platforms. Among skill tests, the best known are: the Purdue Pegboard Test, Nine-Hole Peg Test, Jebsen and Taylor test, Pig- Tail Test, Frenchay Arm Test, Action Research Arm Test, Wolf FMT and Finger-Tapping Test. Among motricity scales, the most popular are: the Fugl-Meyer Motor Assessment Scale and Södring Motor Evaluation. Gait and walking can also be assessed quantitatively and qualitatively. Recently, the most popular is three-dimensional analysis of movement. This review article presents the current possibilities of motor assessment in Parkinson`s disease.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of palladium chemical structure on hydrogen sensing properties of carbonaceous–palladium thin films
Autorzy:
Kaminska, A.
Krawczyk, S.
Kozlowski, C.
Powiązania:
https://bibliotekanauki.pl/articles/173783.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
C–Pd thin films
hydrogen sensor
FTIR spectroscopy
Opis:
In this work we investigate nanocomposite carbonaceous–palladium (C–Pd) films prepared by physical vapor deposition. Such films are promising materials for hydrogen sensor applications. This is related to the highly selective hydrogen absorption by palladium nanocrystallites. The C–Pd films obtained in various technological conditions differ in structure and electrical properties. These films were characterized by SEM, EDS and FTIR spectroscopy. FTIR spec-troscopy was used to determine the amount of palladium acetate and fullerene, incompletely decomposed during the deposition process. FTIR spectra enabled us to explain the differences in C–Pd films resistance based on palladium chemical structure. The possibility of the application of C–Pd films as active layers in hydrogen sensors was also studied. The results showed that synthesized C–Pd films containing palladium nanograins could be used for hydrogen sensing.
Źródło:
Optica Applicata; 2013, 43, 4; 633-640
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Magnetostriction
Autorzy:
Szymczak, H.
Żuberek, R.
Powiązania:
https://bibliotekanauki.pl/articles/1929324.pdf
Data publikacji:
1993-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Pd
75.50.Rr
75.70.Cn
Opis:
Experimental and theoretical research on magnetostriction of nanoscale magnetic multilayers is reviewed. The importance of interfaces and the occurrence of the surface magnetostriction is emphasized. It is shown that the dependence of magnetostriction on the magnetic layer thickness is due to the magnetostrictive strains localized at the interface.
Źródło:
Acta Physica Polonica A; 1993, 83, 5; 651-659
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Improvement of Atomic Force Microscope Suitable for Magnetic Domain Structure Measurements
Autorzy:
Sveklo, I.
Dobrogowski, W.
Kisielewski, M.
Maziewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/2013164.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
75.30.Pd
61.16.Ch
Opis:
Based on commercial Burleigh METRIS$\text{}^{TM}$-2000 Atomic Force Microscope two methods of magnetic force measurements were realised. The developed system was successfully applied for study of magnetic structure of both YIG-garnet and CoNi/Pt magneto-optic multilayers.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 527-530
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
G6PD Activity in Malaria Infected Children in Owerri
Autorzy:
Ihenetu, Francis C.
Nwachukwu, Michael I.
Ohalete, Chinyere N.
Njoku-Obi, Treasure Njideka
Nwachukwu, Ogechi I.
Okoro, Chinyere I.
Okereke, Bright Chinemerem
Ihenetu, Stanley Chukwuemeka
Powiązania:
https://bibliotekanauki.pl/articles/1113925.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Children
G6PD
Malaria
Plasmodium falciparum
Plasmodium malarae
Opis:
This paper is a study of G6PD activity in malaria-infected children in Owerri. Blood samples were collected from fifty-one (51) children hospitalized in the Federal Medical Center (FMC) and analyzed using standard Medical Laboratory methods. Results revealed that out of the 51 children examined (26 males and 25 females), 39, representing 76.47% of the total malaria infected children numbers, were G6PD deficient, while 12, representing 23.53%, had normal G6PD. Two different plasmodium species and their percentage occurrences were observed. These were: Plasmodium falciparum (78.43%) and Plasmodium malariae (21.57%). The work indicated that male children were more (P < 0.05) deficient than females, with percentage levels of 61.53% and 38.47%, respectively. In addition, children between the ages of 49-60 months was observed to be more (P < 0.05) G6PD deficient (with percentage of 25.64%), while those between 0-12 months were least G6PD deficient (with percentage of 8.3% (P < 0.05)). As being afflicted with malaria carries a high risk of Glucose-6-phosphate dehydrogenase (G6PD) deficiency in children, there is, therefore, urgent need for public enlightenment on public health implications, need for proper hygiene, as well as a need for strategies for preventing and controlling mosquito populations
Źródło:
World News of Natural Sciences; 2017, 12; 63-72
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
IINS, MIR, and DFT Investigations of Vibrational Spectra of 3,3-Dimethyl-1-Butanol and 3,3-Dimethyl-2-Butanol
Autorzy:
Juszyńska, E.
Hołderna-Natkaniec, K.
Massalska-Arodź, M.
Natkaniec, I.
Ściesińska, E.
Ściesiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/1813169.pdf
Data publikacji:
2008-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.15.Pd
78.70.Nx
33.20.Ea
Opis:
Molecular vibrational spectra in 3, 3-dimethyl-1-butanol, $(CH_3)_3$ $CCH_2CH_2OH$, and 3, 3-dimethyl-2-butanol, $(CH_3)_3CCHOHCH_3$, were measured by the inelastic incoherent neutron scattering and mid infrared spectroscopy and for 3, 3-dimethyl-2-butanol additionally by the far infrared absorption method. Experimental results were discussed and compared with the results of the quantum chemical calculations performed by the density functional theory (DFT/B3LYP/6-311G**) and semi-empirical PM3 calculation methods assuming the isolated molecule approximation.
Źródło:
Acta Physica Polonica A; 2008, 113, 4; 1131-1143
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infiuence of Hydrogen on the Properties of Nanostructured C-Pd Films for Sensing Applications
Autorzy:
Kamińska, A.
Diduszko, R.
Krawczyk, S.
Czerwosz, E.
Sobczak, K.
Powiązania:
https://bibliotekanauki.pl/articles/778287.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
C-Pd films
hydrogen sensor
GIXD measurements
resistance changes
Opis:
In this paper we present the results of the investigations of nanostructured C-Pd films for hydrogen sensing applications. These C-Pd films were prepared by physical vapor deposition and then annealed in an argon flow at the temperature of 500°C. The structure and morphology of the prepared C-Pd films were investigated using transmission electron microscopy and energy dispersive X-ray spectroscopy. We studied the infiuence of hydrogen on the electrical properties and crystal structure of C-Pd films. It was shown that film resistance changes depended on hydrogen concentration. At lower hydrogen concentration (up to 2 vol.%), the films response increased proportionally to [H2], while above 2 vol.% H2, it was almost constant. This is connected with the formation of a solid solution of hydrogen in palladium at lower H2 concentration and the creation of palladium hydride at higher H2 concentration. X-ray diffraction was used to confirm the formation of Pd-H solid solution and palladium hydride.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 2; 77-81
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Brazing of selected heat-resisting alloys using Ni-Pd filler metal
Lutowanie twarde wybranych stopów żaroodpornych z zastosowaniem lutu Ni-Pd
Autorzy:
Baranowski, Michał
Senkara, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/115053.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
lutowanie próżniowe
lutowanie twarde
lut Ni-Pd
stop żaroodporny
struktura
złącze
vacuum brazing
Ni-Pd filler metal
heat-resisting alloy
structure
joint
Opis:
Pd is a component of some advanced nickel filler metals designed for brazing heat-resisting alloys in order to improve their wettability and to enhance both corrosion resistance and plasticity of the joints. The joints of Inconel 625, Inconel 718, Hastelloy X, and 410 martensitic stainless steel were prepared by vacuum brazing with NiPd36Cr10BSi filler alloy. Complex structures of the joints were tested. It was revealed the displacement of interfaces from their initial positions in the course of brazing along with active action of Cr, Mo and Nb (for Inconel 718 alloy) in the formation of interstitial layers.
Pallad jest głównym składnikiem niektórych zaawansowanych lutów niklowych, przeznaczonych do lutowania twardego stopów żaroodpornych w celu poprawy ich zwilżalności oraz zwiększenia zarówno odporności na korozję jak i plastyczności połączeń. Wykonane zostały złącza stopów Inconel 625, Inconel 718, Hastelloy X i martenzytycznej stali nierdzewnej 410 metodą lutowania próżniowego stopem NiPd36Cr10BSi. Badano złożone struktury połączeń, ujawniając przesunięcie granic międzyfazowych z ich początkowych pozycji w trakcie lutowania oraz aktywne oddziaływanie Cr, Mo oraz Nb (dla stopu Inconel 718) podczas tworzenia się warstw przejściowych.
Źródło:
Welding Technology Review; 2019, 91, 10; 51-58
0033-2364
2449-7959
Pojawia się w:
Welding Technology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zaburzenia wydzielania hormonów tarczycy jako powikłanie immunoterapii rozsianego czerniaka - opis przypadku
Disorders of thyroid hormone secretion as a complication of melanoma immune therapy - case report
Autorzy:
Szczepaniak, Katarzyna
Błasińska-Morawiec, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1034443.pdf
Data publikacji:
2018
Wydawca:
Oficyna Wydawnicza Mediton
Tematy:
PD-1 inhibitor
czerniak
nadczynność tarczycy
niedoczynność tarczycy
nivolumab
Opis:
The presented paper describes a case of a 69-year old female with disseminated malignant melanoma without BRAF V600E mutation who was treated with nivolumab, a novel PD-1/PDL-1 monoclonal antibody and experienced an autoimmunological side effect of initial hyperthyroidism, which then transformed into hypothyroidism. The reasons of immunological side effects and current guidelines for their treatment are discussed.
W niniejszej pracy przedstawiono przypadek 69-letniej kobiety, u któ- rej w trakcie leczenia nivolumabem, nowym lekiem z grupy inhibitorów PD1/PDL-1 z powodu rozsianego czerniaka bez mutacji BRAF V600E, wystąpiły powikłania immunologiczne pod postacią zaburzeń funkcji gruczołu tarczowego. Początkowa nadczynność przeszła póź- niej w niedoczynność. Omówiono przyczyny powikłań leczenia immunologicznego oraz aktualnie obowiązujące wytyczne postępowania terapeutycznego.
Źródło:
Alergia Astma Immunologia - przegląd kliniczny; 2018, 23, 1; 54-56
1427-3101
Pojawia się w:
Alergia Astma Immunologia - przegląd kliniczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Invasive vs. Non-Invasive Methods in Estimating Slope Stability, with Application in the Copou Area, Iaşi, Romania
Autorzy:
Pascariu, F.
Negru, C.
Şaramet, M.
Chelariu, C.
Powiązania:
https://bibliotekanauki.pl/articles/1401973.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
91.30.pd
91.62.Ty
92.40.Ha
Opis:
Slope stability analysis represents nowadays a constant pursuit, being applied in various domains, such as geological and geomorphological studies, civil engineering or urban expansion. In this paper, two different methods were employed in order to establish the stability of the Copou Hill, Iaşi, Romania, and the results were compared. The first, non-invasive, method involves obtaining a landslide risk map by identifying the factors that induce the slope failure and overlaying the obtained maps. The second one, invasive, implies computing a safety factor using the infinite slope method, employing well data from this area and ranging the thickness of the water column. This comparison was made in order to improve the non-invasive method, so as to apply it in areas where there is no geological information. The resulting landslide risk map shows values of the average coefficient Kₘ ranging between 0.21 and 0.63, implying a medium to high failure probability for the studied slope. On the other hand, the infinite slope method indicates a safety factor with values between 0.91 and 1.49, at a complete flooding of the land-sliding lithological column, with a single exception with much lower value. These values are below the admissible factor, suggesting failure with a medium to high probability. Comparing these two methods, significant similarities between the landslide risk map results and the computed safety factors can be observed. For further testing of the first method, similar studies should also be made in other areas.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-193-B-196
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 16-30 z 80

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