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Tytuł:
Design of a Dual-Polarization Dual-Wideband Planar Antenna
Autorzy:
A'isya Nur Aulia Yusuf
Fitri Yuli Zulkifli
Powiązania:
https://bibliotekanauki.pl/articles/2055241.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
planar antenna
dual wideband
dual polarization
Opis:
Wireless communication is a fundamental requirement because of its low cost, high flexibility and convenience, continuing improvements in speed and connectivity, and accessibility in remote areas. One example is very small aperture terminal (VSAT) communication. A VSAT is a two-way satellite ground station operating at C-band and Ku-band frequencies, with linear and circular polarization in the C band and linear polarization in the Ku band. For the data transmitted by a satellite to be utilized by a user, the antenna on the user side must have dual-wideband and dual-polarization characteristics. In this study, a dual-polarization planar dual-wideband antenna with dimensions of 30 x 39 x 1.52 mm3 was designed using a dual-port approach. The introduction of a slot and perturbation on the patch side results in the dual-wideband characteristics of the antenna. The introduction of slots into the antenna ground results in circular polarization. The proposed antenna has resonant frequencies of 3 - 15 GHz on port 1 and 3.31 – 7.79 GHz and 9.05 – 15 GHz on port 2, with circular polarization characteristics on port 1 and linear polarization characteristics on port 2. On port 1, the gains at frequencies of 4.2 GHz is 3.93 dB, while on port 2, the gains at frequencies of 3.9 GHz is 0.51 dB.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 1; 41--46
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and evaluation of performance of dual field-of-view common-aperture dual-band imaging system
Autorzy:
Wang, Qingsong
Gao, Ming
Powiązania:
https://bibliotekanauki.pl/articles/2172850.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
common aperture
dual-band
dual FOV
performance modeling
Opis:
For the modeling and evaluation of dual field-of-view (FOV) common-aperture dual-band imaging system performance, two factors must be considered at the same time. One is that the system must have a larger target acquisition range, and the other is that the detection range and recognition range of the system must be the same. In this paper, taking the dual FOV common-aperture visible/long-wave infrared (LWIR) imaging system as an example, the performance of the dual FOV common-aperture dual-band imaging system is modeled and evaluated using an imaging system performance model based on comprehensive resolution. Firstly, the target acquisition range of the dual FOV visible imaging system is analyzed, and the condition that the detection range is equal to the recognition range is obtained. Then, under the condition of common aperture, the target acquisition range and the relationship between detection range and recognition range of dual FOV LWIR imaging system are analyzed. The analysis results show that, under the condition of dual FOV and common aperture, when the detection and recognition ranges of the visible imaging system are equal, the detection and recognition ranges of the LWIR imaging system are not equal. When the detection and recognition ranges are close by reducing the comprehensive resolution, the target acquisition range of the dual FOV common-aperture dual-band imaging system will decrease.
Źródło:
Optica Applicata; 2022, 52, 4; 535--550
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiary dwuenergetycznej tomografii (Dual Energy CT) w celu badania skał
Calibration of dual energy CT scans for rock core examination
Autorzy:
Dohnalik, Marek
Kaczmarczyk, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1834984.pdf
Data publikacji:
2019
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
tomografia komputerowa
Dual Energy CT
DECT
dwuenergetyczna tomografia
computed tomography
dual energy CT
dual energy computed tomography
Opis:
: Jedno z pierwszych zastosowań rentgenowskiej tomografii komputerowej w geologii miało miejsce w 1974 roku. Tomografia rentgenowska (CT) umożliwia nieinwazyjne obrazowanie badanych przedmiotów. Wynikiem pomiaru tomograficznego jest przestrzenny obraz, przedstawiający zmiany absorpcji promieniowania rentgenowskiego. Powstaje on poprzez wyliczenie, podczas procesu rekonstrukcji, wartości absorpcji dla każdego punktu badanego przedmiotu. Istotną zaletą tomografów komputerowych jest możliwość przebadania dużych obiektów (metrowych odcinków rdzenia) w bardzo krótkim czasie. Ich wadą jest natomiast względnie niska rozdzielczość pomiaru. Każdy woksel na obrazie tomograficznym ma przypisaną konkretną wartość zaczernienia proporcjonalną do liniowego współczynnika tłumienia, zależną od gęstości elektronowej i efektywnej liczby atomowej, uśrednionych w obrazowanej przestrzeni (zakres uśredniania określa rozdzielczość obrazu tomograficznego). Dysponując dwoma obrazami, zarejestrowanymi przy dwóch różnych energiach pomiaru, można podjąć próbę rozdziału obrazu na dwie składowe: pierwszą – zależną od gęstości elektronowej i drugą – zależną od efektywnej liczby atomowej. Celem opisanych prac jest pokazanie możliwości wykorzystania dwuenergetycznej tomografii komputerowej (DECT) do charakterystyki litologiczno-gęstościowej rdzeni wiertniczych. Aby wykorzystać obrazy tomograficzne do otrzymania wymienionych wielkości fizykochemicznych konieczna jest standaryzacja obrazów. W pracy przedstawiono proces wyznaczania współczynników kalibracyjnych, które są niezbędne do przeliczania wartości współczynników absorpcji, będących bezpośrednim wynikiem rekonstrukcji pomiaru tomograficznego na wartości gęstości elektronowej oraz efektywnej liczby atomowej Z. W artykule zaprezentowano proces kalibracji z wykorzystaniem wzorcowych minerałów. Wyliczone z analizy obrazów wartości próbek wzorcowych, porównano z wartościami wyznaczonymi metodami laboratoryjnymi. Przykład zastosowania wyników przedstawiono na przebadanym fragmencie obrazu rdzenia piaskowca, zawierającego szczelinę wypełniona kalcytem.
One of the first applications of X-ray computed tomography in geology took place in 1974. X-ray tomography (CT) allows non-invasive imaging of the examined objects. The result of a tomographic measurement is a spatial image, showing the changes in X-ray absorption value for each point of the examined object, which are a result of calculations during the reconstruction process. An important advantage of computer tomographs is the ability to test large objects (meter sections of the core) in a very short time, while the disadvantage is the relatively low resolution of the measurement. Each voxel in the tomographic image has a specific grey value, proportional to the linear attenuation coefficient, depending on the electron density and the effective atomic number averaged in the imaged space (the averaging range is determined by the resolution of the tomographic image). Two tomographic images registered at two different energies, allows the deconvolution of the images into two components: the first – dependent on the electron density and the second – dependent on the effective atomic number. The aim of this study is to show the possibility of using dual energy computed tomography (DECT) to litho-density characterization of rock cores. In order to use tomographic images to obtain the above-mentioned physicochemical values, it is necessary to standardize CT images. The paper presents the process of determining calibration coefficients, which are necessary to convert the values of absorption coefficients, which are a direct result of CT reconstruction, into density values and effective Z atomic number. The article presents the calibration process with the use of reference rock fragments. The values of the standard samples computed from the analysis of images were compared with the values determined by laboratory methods. An example of the application of results is presented on the examined part of the image of the sandstone core, containing a calcite-filled fracture.
Źródło:
Nafta-Gaz; 2019, 75, 2; 83-88
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pozostałości liczby podwójnej w języku łacińskim epoki archaicznej
Remains of Dual Number Forms in Archaic Latin
Autorzy:
Witczak, Krzysztof Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1878366.pdf
Data publikacji:
2019-10-23
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
liczba podwójna
eliptyczny dual
łacińska morfologia
piąta deklinacja łacińska
dual number
elliptic dual
Latin morphology
Latin fifth declension
Opis:
Artykuł przedstawia prawdopodobne ślady liczby podwójnej występujące w języku łacińskim epoki przedklasycznej. Do nich zaliczamy archaiczne formy genetiwu zakończone na -ūs lub rzadziej (po spółgłoskach labialnych) na -ō̩s (< gen. du. *-ous), pojawiające się 23 razy na inskrypcjach łacińskich z II w. p.n.e. (np. Castorus, Cererus, Diovos, hominus, nominus, partus, regus, Salutus, Venerus), a także formy dopełniacza liczby mnogiej rzeczowników trzeciej deklinacji na -ērum (np. bovērum, Iovērum, lapidērum, nāvērum, nucērum, rēgērum), oparte na nom.-acc. du. na -ē, występujące w tekstach literackich epoki archaicznej, np. bovērum ‘wołów’ (pierwotnie ‘dwóch wołów’) ← nom.-acc. du. *bovē ‘dwa woły’ ← nom. sg. bōs m. f. ‘wół, krowa’. W trakcie procesu zanikania liczby podwójnej pojawiły się gruntowne zmiany w obrębie deklinacji łacińskiej, na skutek których ukształtowała się w obrębie 3 deklinacji specyficzna odmiana dualno-pluralna z charakterystyczną cechą -ē-. Zanik liczby podwójnej odbywał się albo poprzez pluralizację form dualnych, albo poprzez ich kolektywizację i syngularyzację. Ostatecznym rezultatem tych złożonych procesów morfologicznych było uformowanie się osobnej piątej deklinacji łacińskiej.      
The paper describes the possible traces of dual number forms preserved in the Latin language of the archaic period. Certain epigraphic sources of the 2nd century BC contain a total of 23 examples of third declension genitive forms ending in -us or rarely (after labial consonants) -ō̩s (e.g. Castorus, Cererus, Diovos, hominus, nominus, partus, regus, Salutus, Venerus). We can also distinguish genitive plural forms in -ērum (e.g. bovērum, Iovērum, lapidērum, nāvērum, nucērum, rēgērum), which seem to derive from the nominative-accusative du. in *-ē, e.g. bovērum ‘of oxen’ (originally ‘of two oxen’) ← nom.-acc. du. *bovē ‘two oxen’ ← nom. sg. bōs m. f. ‘ox, cow’. The loss of the dual number in the early phase of the development of the Latin language caused massive changes in the Latin declension. Highly specific dual-plural forms of consonant stems characterised by the feature -ē- (cf. *bovē ‘two oxen’, gen. bovērum ‘of oxen’) must have existed within the third Latin declension. Old “petrified” dual forms were generally reinterpreted as plurals (i.e. nom. du. *-ē → nom. pl. -ēs) and sometimes as collectives or singulars. The latter morphological processes led to the formation of the Latin fifth declension.
Źródło:
Roczniki Humanistyczne; 2017, 65, 3; 37-58
0035-7707
Pojawia się w:
Roczniki Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Complexities of Dual Citizenship Analysis
Autorzy:
Pudzianowska, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/498585.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual citizenship
migration
Polska
Opis:
The prevalent conceptual approach used to assess multiple citizenship legislation is based on analysing a set of selected elements of the relevant legal framework. This paper argues that the evolution of legal rules on dual citizenship cannot be comprehensively analysed using methods created for comparative analyses and based on a narrow selection of legal rules that reflect either a restrictive or an open approach to dual citizenship. The simplified approach that focuses on the analysis of selected fragments of explicit legislation generates results that may be misleading. Therefore, the terms of reference for comparative study of multiple citizenship should be elaborated and extended. A comprehensive comparative method also has to take into account the migration context as well as relevant aspects of the legal and political context. This article explores these issues through an analysis of Polish legal rules in the field of dual citizenship.
Źródło:
Central and Eastern European Migration Review; 2017, 6, 1; 15-30
2300-1682
Pojawia się w:
Central and Eastern European Migration Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perturbation Element Effect on Frequency Stability in Dual Mode Reconfigurable Filters Based on Circular Microstrip Ring Resonators
Autorzy:
Albahnassi, Muhammad Haitham
Malki, Adnan
Almekdad, Shokri
Powiązania:
https://bibliotekanauki.pl/articles/227210.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual mode ring resonators
dual-mode filters
perturbation element arrangement
BW reconfigurability
Opis:
A detailed study about the suitable perturbation element shape and location for tunable BW dual mode microstrip filter which has circular ring resonator is presented. BW tuning is achieved by resonator geometry modification. The study explains the effect of a perturbation element on the stability of the center frequency during BW tuning. Different cases have been studied for two shapes of perturbation element; which one is a rectangular and the other is a radial. The treated cases discuss whether the perturbation element is located in the inner or in the outer circumference of the ring, and whether it is a patch or a notch. BW tuning simulation treated the case of FBW3dB increase for two and three times. The best case of perturbation element which has the best center frequency stability has been modeled, simulated, and fabricated at 2.4 GHz. Geometry modification of the filter took into account the RF MEMS modeling. The filter has an elliptic frequency response, and its FBW has been increased in five steps from 1.7% to 5%. The designed filters were evaluated experimentally and by simulation with very good agreement.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 731-737
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-attribute decision-making based on q-rung dual hesitant power dual Maclaurin symmetric mean operator and a new ranking method
Autorzy:
Li, Li
Wang, Jun
Ji, Chunliang
Powiązania:
https://bibliotekanauki.pl/articles/2175106.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
q-rung dual hesitant fuzzy sets
power geometric
dual Maclaurin symmetric mean
power dual Maclaurin symmetric mean
multi-attribute decision-making
Opis:
The ability of q-rung dual hesitant fuzzy sets (q-RDHFSs) in dealing with decision makers’ fuzzy evaluation information has received much attention. This main aim of this paper is to propose new aggregation operators of q-rung dual hesitant fuzzy elements and employ them in multi-attribute decision making (MADM). In order to do this, we first propose the power dual Maclaurin symmetric mean (PDMSM) operator by integrating the power geometric (PG) operator and the dual Maclaurin symmetric mean (DMSM). The PG operator can reduce or eliminate the negative influence of decision makers’ extreme evaluation values, making the final decision results more reasonable. The DMSM captures the interrelationship among multiple attributes. The PDMSM takes the advantages of both PG and DMSM and hence it is suitable and powerful to fuse decision information. Further, we extend the PDMSM operator to q-RDHFSs and propose q-rung dual hesitant fuzzy PDMSM operator and its weighted form. Properties of these operators are investigated. Afterwards, a new MADM method under q-RDHFSs is proposed on the basis on the new operators. Finally, the effectiveness of the new method is testified through numerical examples.
Źródło:
Archives of Control Sciences; 2022, 32, 3; 627--658
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Amenability and the second dual of a Banach algebra
Autorzy:
Gourdeau, Frédéric
Powiązania:
https://bibliotekanauki.pl/articles/1219583.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
amenability
Arens regularity
second dual
Opis:
Amenability and the Arens product are studied. Using the Arens product, derivations from A are extended to derivations from A**. This is used to show directly that A** amenable implies A amenable.
Źródło:
Studia Mathematica; 1997, 125, 1; 75-81
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel robust control design for unstable systems with dual pole and dual zero
Autorzy:
Zhang, X.
Zhang, G.
Powiązania:
https://bibliotekanauki.pl/articles/205848.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
unstable process
robust control
improvement
closed-loop gain shaping
dual pole
dual zero
Opis:
In this note, a novel robust control design for a class of unstable systems with dual pole and dual zero is addressed. In the algorithm, αfeedback node was moved from the interior of the controlled plant to its right-hand side. Then, the closed-loop gain shaping algorithm was used to design the feedback transfer function. Consequently, controller and the controlled plant have clear physical meaning and are easily tuned. Simulation results show that the control effects are better than for the previous modification, the system can have rapid settling time with no overshoot, zero steadystate error and satisfactory robust stability to model perturbation and disturbance. The method has the advantages of simple and efficient design, and it was also successfully applied to control static unstable missile.
Źródło:
Control and Cybernetics; 2013, 42, 3; 613-625
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposal of ecological propulsion for seagoing ships
Autorzy:
Górski, Z.
Ćwilewicz, R.
Powiązania:
https://bibliotekanauki.pl/articles/245781.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
natural gas in marine propulsion
dual fuel marine engines
dual fuel marine boilers
Opis:
Exhaust gases from engines of seagoing ships are the serious problem for environment. That is why the discussion in the matter is very important. One of means to minimise harmful substances emission to earth atmosphere is application of „ecological fuel" — natural gas or nuclear energy for ship propulsion. Natural gas is commonly used in onshore applications but is rarely applied in marine propulsion. Heavy Fuel Oil is the basic brand of fuel used onboard ofseagoing ships. Other kinds of fuel e.g. Diesel Oil or gas Oil are used on smaller ships with limited sailing range. The nuclear energy, due to high costs is used only on few types of warships and some icebreakers. A real means for minimising harmful substances in exhaust gases from ships engines is replacement of Heavy Fuel Oil by Natural gas. Nowadays, heavy oil is commonly used due to technical and logistic abilities and conservative attitude of ship owners. The necessity of improvement in the field of environment protection inclines towards wide application of Natural gas as marine fuel. Application power-plant novel type would break the traditionalism in the shipbuilding and the introduction novel generation ofshipping drives.
Źródło:
Journal of KONES; 2009, 16, 3; 121-128
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A programmable delay line
Autorzy:
Perko, K.
Szplet, R.
Powiązania:
https://bibliotekanauki.pl/articles/114438.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
delay line
dual interpolation method
Opis:
The paper describes the design and test results of a programmable digital delay line implemented in an FPGA device (Kintex-7, Xilinx). The operation of the delay line is based on the modified dual interpolation Nutt method that combines two actions, i.e.: (1) counting the periods of a reference clock and (2) time interpolating within a single clock period. The first action provides an extremely wide range of the introduced delays (> 9 minutes), while the second one allows reaching relatively high delay resolution (2 ns) with a timing jitter as low as 35 ps (until delay of 1 μs). The high metrological parameters of the designed delay line are achieved at the expense of increased difficulty in implementation of the method in an integrated circuit. The major problems to be solved were the synchronizations of input signals as well as synchronous and asynchronous parts of the system, which were effectively provided with the use of two dual-edge synchronizers, a clock signal logic level detection system and associated synchronizers.
Źródło:
Measurement Automation Monitoring; 2015, 61, 7; 311-313
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of Family Policy Regimes in Work–Family Adaptations: Polish Parents in Norway and Poland
Autorzy:
Bjørnholt, Margunn
Stefansen, Kari
Wężyk, Agata
Merecz-Kot, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/498735.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual-earner/dual-carer model
family practices
work–family adaptations
gender equality
family policy
Opis:
The aim of this article is to examine how family policies contribute to changes in family practices and towards gender equality in families. Empirically we draw on interviews with two groups of Polish-born parents: Polish parents who have migrated to Norway and Polish parents living in Poland. Norway and Poland are relevant cases for our exploration because they represent different types of welfare states, which have followed different paths towards their current family policy package. In our analysis of actual work–family adaptations we found a convergence towards gender-equal dual-earner/dual-carer arrangements in both groups, although there were differences in the level of agency. Polish parents in Poland felt less entitled to use the measures available to them, and sometimes refrained from using them, compared to Polish parents in Norway who expressed a strong sense of agency in using family policy measures to create a good life in Norway and as part of a project of change towards more gender-equal sharing of work and care responsibilities. The analysis confirms the strong link between family practices and family policies, but also illustrates how the effect of policies on practices may be hampered or boosted by the wider historical-cultural context of the society in question. In conclusion, in analyses of the link between policy and practice it may be fruitful to distinguish between family policy packages – the concrete set of entitlements for working parents – and family policy regimes, meaning policies in their wider context, including migrancy as a mediating factor.
Źródło:
Central and Eastern European Migration Review; 2017, 6, 2; 31-50
2300-1682
Pojawia się w:
Central and Eastern European Migration Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Closure Operators on Complete Almost Distributive Lattices-III
Autorzy:
Rao, Calyampudi Radhakrishna
Undurthi, Venugopalam
Powiązania:
https://bibliotekanauki.pl/articles/749960.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Complete Almost Distributive Lattice
Closure operator
Dual atom
Dual atomistic
Completely meet-irreducible element
Opis:
In this paper, we prove that the lattice of all closure operators of a complete Almost Distributive Lattice L with fixed maximal element m is dual atomistic. We define the concept of a completely meet-irreducible element in a complete ADL and derive a necessary and sufficient condition for a dual atom of Φ(L) to be complemented.
Źródło:
Bulletin of the Section of Logic; 2015, 44, 1-2
0138-0680
2449-836X
Pojawia się w:
Bulletin of the Section of Logic
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of dual specificity protein kinase from maize seedlings.
Autorzy:
Trojanek, Joanna
Klimecka, Maria
Fraser, Anna
Dobrowolska, Grażyna
Muszyńska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1041540.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
dual specificity kinase
tyrosine phosphorylation
maize
Opis:
A protein kinase of 57 kDa, able to phosphorylate tyrosine in synthetic substrates pol(Glu4,Tyr1) and a fragment of Src tyrosine kinase, was isolated and partly purified from maize seedlings (Zea mays). The protein kinase was able to phosphorylate exogenous proteins: enolase, caseins, histones and myelin basic protein. Amino acid analysis of phosphorylated casein and enolase, as well as of phosphorylated endogenous proteins, showed that both Tyr and Ser residues were phosphorylated. Phosphotyrosine was also immunodetected in the 57 kDa protein fraction. In the protein fraction there are present 57 kDa protein kinase and enolase. This co-purification suggests that enolase can be an endogenous substrate of the kinase. The two proteins could be resolved by two-dimensional electrophoresis. Specific inhibitors of typical protein-tyrosine kinases had essentially no effect on the activity of the maize enzyme. Staurosporine, a nonspecific inhibitor of protein kinases, effectively inhibited the 57 kDa protein kinase. Also, poly L-lysine and heparin inhibited tyrosine phosphorylation by 57 kDa maize protein kinase. The substrate and inhibitor specificities of the 57 kDa maize protein kinase phosphorylating tyrosine indicate that it is a novel plant dual-specificity protein kinase.
Źródło:
Acta Biochimica Polonica; 2004, 51, 3; 635-647
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of combustion process in a dual-fuel compression ignition engine fuelled with LPG in the liquid phase
Autorzy:
Luft, S.
Powiązania:
https://bibliotekanauki.pl/articles/246428.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dual-fuel compression ignition engine
LPG
Opis:
Investigation on fuelling a dual-fuel compression ignition engine with various fuels, that are unconventional for this type of engine, was carried out for many years in the Department of Internal Combustion Engines and Automobiles in Technical University of Radom. Such fuels as methanol, ethanol and natural gas were applied in the investigation. Recently, the investigation regards application of LPG - a fuel that is very popular in Poland. Within the project No. 4T12D02226 of the Committee of Scientific Research, it was tested, among others, an engine equipped with injection system for diesel fuel pilot dose - a common rail type. As a result of the former investigation, load characteristics of specific energy consumption as well as CO, CO2, nox, HC and smoke emissions data were obtained [1]. In order to analyze variability of fundamental combustion process parameters, histories of the pressure inside combustion chamber have been registered during investigation. Investigation on changes of these parameters in the described engine version is particularly important due to possibility of knocking combustion occurrence that leads to the failure of such engine parts as piston or valves. Changes of these parameters versus engine load for various injection timing of diesel fuel pilot dose were analysed.
Źródło:
Journal of KONES; 2007, 14, 3; 355-362
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DUALIZM EGZEKUTYWY JAKO ZAGROŻENIE DLA PROCESU DEMOKRATYZACJI – RZECZYWISTOŚĆ CZY IMAGINACJA?
DUAL EXEUCTIVE AS A THREAT TO THE PROCESS OF DEMOCRATIZATION – REALITY OR IMAGINATION?
Autorzy:
Banaś, Michał
Powiązania:
https://bibliotekanauki.pl/articles/512898.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
dual executive
threat, transformation
transition
democratization
Opis:
The aim of this article is to analyse the impact of dual executive with the president elected by popular vote on the democratic transformation of post-communist countries of Europe and Eurasia. For this purpose following hypothesis was investigated: the system of government based on dual executive is a threat to democratization. Accepting that this process consists of three parallel transitions (political, economic and social), the author examined the impact of dual executive on the results of post-communist countries of Europe and Eurasia in two indexes: Revised Polity Score and Economic Freedom of the World. Thanks to this study some conclusions could be drawn pertaining to the impact of the system based on dual executive on the effects of the democratization of selected countries in political and economic areas. This allowed following question to be an-swered: is it a fact that a system of government based on dual executive with a president elected by popular vote is a threat to democratization?
Źródło:
Polityka i Społeczeństwo; 2014, 12, 2; 25-36 (12)
1732-9639
Pojawia się w:
Polityka i Społeczeństwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Approaches for Project Costs Minimization with Use of Dual Problems
Autorzy:
Chernov, S.
Titov, S.
Chernova, L.
Kunanets, N.
Powiązania:
https://bibliotekanauki.pl/articles/410624.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
linear optimization
primal problem
dual problem
duality
objective function
constraint system
pairs of dual problems
Opis:
For determining ways of company development, ensuring the growth of profit in manufacture and sales of certain products, it has been proposed to use an algorithm of constructing a problem being inverse to primal-dual one, for minimization of the project costs. The primal and the inverse problems contribute to improving the efficiency of calculation when determining approaches for minimization of costs. This pair of problems is mutually conjugate. The proposed rigorous approach to obtaining the algorithm of constructing a dual problem is based on the following statement: a problem being inverse to a dual one is a primal (original) problem. The authors have proposed and rigorously proven the algorithm of a general approach to the construction of conjugate problem pairs. Formalization of the algorithm developed allows obtaining easily correct pairs of known dual problems. This permitted proposing and proving the truth of the algorithm of constructing a dual problem for the arbitrary form of a primal problem representation.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2019, 8, 2; 61-68
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moral Competence and Moral Orientation in Robots
Autorzy:
Schmiljun, André
Powiązania:
https://bibliotekanauki.pl/articles/781331.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
moral competence
moral orientation
Georg Lind
robot ethics
Dual Aspect
Dual Layer Theory of Moral Self
Opis:
Two major strategies (the top-down and bottom-up strategies) are currently discussed in robot ethics for moral integration. I will argue that both strategies are not sufficient. Instead, I agree with Bertram F. Malle and Matthias Scheutz that robots need to be equipped with moral competence if we don’t want them to be a potential risk in society, causing harm, social problems or conflicts. However, I claim that we should not define moral competence merely as a result of different “elements” or “components” we can randomly change. My suggestion is to follow Georg Lind’s dual aspect dual layer theory of moral self that provides a broader perspective and another vocabulary for the discussion in robot ethics. According to Lind, moral competence is only one aspect of moral behavior that we cannot separate from its second aspect: moral orientation. As a result, the thesis of this paper is that integrating morality into robots has to include moral orientation and moral competence.
Źródło:
Ethics in Progress; 2019, 10, 2; 98-111
2084-9257
Pojawia się w:
Ethics in Progress
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some dual logic without tautologies
Autorzy:
Górnicka, A.
Bryll, A.
Powiązania:
https://bibliotekanauki.pl/articles/951850.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
podwójna logika
tautologia
dual logic
tautology
Opis:
On this paper we consider a logic dual to the logic CRA and prove that it does not contain tautologies.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2015, 20; 39-47
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual completion petroleum production engineering for several oil formations
Autorzy:
Ivanova, T. N.
Korshunov, A. I.
Koretckiy, V. P.
Powiązania:
https://bibliotekanauki.pl/articles/409668.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
dual completion
wells
deposits
layouts
hydrocarbons
Opis:
Cost-efficient, enabling technologies for keeping and increasing the reservoir recovery rate of oil-formations with high water cut of produced fluids and exhausted resource are really essential. One of the easiest but short-term ways to increase oil production and incomes at development of oil deposits is cost of development and capital cost reduction. Therefore, optimal choice and proper feasibility study on the facilities for multilayer oil fields development, especially at the late stage of reservoir working, is a crucial issue for now-day oil industry. Currently, the main oil pools do not reach the design point of coefficient of oil recovery. The basic feature of the late stage of reservoir working is the progressing man-made impact on productive reservoir because of water injection increasing for maintaining reservoir pressure. Hence cost-efficient, enabling technologies for keeping and increasing the reservoir recovery rate of oil-formations with high water cut of produced fluids and exhausted resource are really essential. To address the above concerns the dual completion petroleum production engineering was proposed. The intensity of dual completion of formation with of different permeability is determined by rational choice of each of them. The neglect of this principle results a disproportionately rate of highly permeable formations development for the time. In effect the permeability of the formations or their flow rate is decreasing. The problem is aggravated by lack of awareness of mechanics of layers' mutual interference in producers and injectors. Dual completion experience in Russian has shown, that success and efficiency of the technology in many respects depend on engineering support. One of the sufficient criteria for the choice of operational objects should be maximal involvement of oil-saturated layers by oil displacement from seams over the economic life of well producing oil. If it is about getting high rate of oil recovery for irregular formations there is no alternative to dual completion and production. The recommended dual completion petroleum production technology enables development several formations by single well at the time. The dual completion petroleum production technology has been more important than ever because it is right not only for formations but for thin layers with undeveloped remaining reserves.
Źródło:
Management Systems in Production Engineering; 2018, 4 (26); 217-221
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extension of several sufficient conditions for Hamiltonian graphs
Autorzy:
Ainouche, Ahmed
Powiązania:
https://bibliotekanauki.pl/articles/744192.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
hamiltonian graph
dual closure
neighborhood closure
Opis:
Let G be a 2-connected graph of order n. Suppose that for all 3-independent sets X in G, there exists a vertex u in X such that |N(X∖{u})|+d(u) ≥ n-1. Using the concept of dual closure, we prove that
1. G is hamiltonian if and only if its 0-dual closure is either complete or the cycle C₇
2. G is nonhamiltonian if and only if its 0-dual closure is either the graph $(K_r ∪ Kₛ ∪ Kₜ) ∨ K₂$, 1 ≤ r ≤ s ≤ t or the graph $((n+1)/2)K₁ ∨ K_{(n-1)/2}$.
It follows that it takes a polynomial time to check the hamiltonicity or the nonhamiltonicity of a graph satisfying the above condition. From this main result we derive a large number of extensions of previous sufficient conditions for hamiltonian graphs. All these results are sharp.
Źródło:
Discussiones Mathematicae Graph Theory; 2006, 26, 1; 23-39
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling hybrid powertrain operation of a wheeled vehicle including dual power source
Autorzy:
Banaś, W.
Kost, G.
Nierychlok, A.
Powiązania:
https://bibliotekanauki.pl/articles/99448.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
hybrid powertrain
dual source
wheeled vehicle
Opis:
The paper presents a way of modeling hybrid drive system with a dual source of electricity. The use of such solution is to use better used and flow of energy in hybrid vehicle. Describes the sizing of electrochemical batteries per unit weight of a wheeled vehicle and the system was adopted to supporting the super-capacitor batteries. Presents a concept of switching multiple units in a hybrid system, which adopted the criterion of engine rotational speed and linear speed of the vehicle.
Źródło:
Journal of Machine Engineering; 2011, 11, No. 1-2; 152-161
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie lokomotywy dwunapędowej typu 111DE w transporcie intermodalnym
Application of locomotive dual mode type 111de for intermodal transport
Autorzy:
Pietrzkiewicz, Hubert
Domagała, Radomir
Michalak, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2081119.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
lokomotywa
dwunapędowa
intermodalny
locomotive
dual mode
intermodal
Opis:
W ramach artykułu przedstawiono główne założenia Krajowego Programu Kolejowego i stan taborowy lokomotyw spalinowych i elektrycznych w Polsce. Artykuł zawiera opis rozwoju transportu intermodalnego w kraju oraz lokalizację największych terminali intermodalnych na terenie Polski. Zaprezentowany został również rozkład linii kolejowych w Polsce z podziałem na zelektryfikowane i niezelektryfikowane. Przedstawiono dwunapędową lokomotywę typu 111DE zaprojektowaną na potrzeby przewozów intermodalnych i pasażerskich wraz z jej podstawowymi danymi technicznymi i charakterystykami trakcyjnymi. Opisana lokomotywa dwunapędowa zbudowana została podczas realizacji projektu w ramach Programu Operacyjnego Inteligentny Rozwój nr POIR. 01.02.00-00-0191/16-00 pt. „Platforma lokomotyw z zaawansowanymi spalinowo-elektrycznymi (wielosystemowymi) układami napędowymi”, dofinansowywanego przez Narodowe Centrum Badań i Rozwoju. Wykonawcą powyższego projektu są Pojazdy Szynowe PESA Bydgoszcz S.A. i Sieć Badawcza Łukasiewicz – Instytut Pojazdów Szynowych „TABOR” w Poznaniu.
The article presents the main assumptions of the National Railway Program and the rolling stock status of diesel and electric locomotives in Poland. The article describes the development of intermodal transport in the country and the location of the largest intermodal terminals in Poland. The dual-drive locomotive type 111DE designed for intermodal and passenger transport, along with its basic technical data and traction characteristics was presented as a part of the article. The described dual mode locomotive was realized within the Operational Program Intelligent Development No. POIR. 01.02.00-00-0191/16-00 entitled “Locomotive platform with advanced diesel-electric (multi-system) driving systems”, co-funded by the National Center for Research and Development. The contractor of the project is PESA Bydgoszcz S.A. Railroad Vehicles. and the Łukasiewicz Research Network - Institute of Rail Vehicles „TABOR” in Poznań.
Źródło:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2021, 2 (123); 305--314
1231-9171
Pojawia się w:
Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operation of a drive system using two independent PMSM motors in passenger lift door drives
Autorzy:
Kolano, Krzysztof Jakub
Powiązania:
https://bibliotekanauki.pl/articles/140945.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
door drive
dual drive system
PMSM motor
Opis:
A brushless direct-current (BLDC) and permanent-magnet synchronous motors (PMSMs) with permanent magnets are characterised by the highest operating parameters among all electric motors. High dynamics and the possibility of controlling their work improves the operating parameters of the drive system and reduces the operating costs of such a device. The high cost of these machines associated with the complexity of their construction is a serious barrier to increasing their range in small propulsion systems, where lower energy consumption does not give such spectacular financial profits. To reduce costs, manufacturers often limit the variety of manufactured engines so that by increasing the volume, the unit cost of the device can be minimised. This is often hindered by the implementation of projects deviating from standards where it is necessary to use drive systems of different power. The solution to this problem could be the use of two independent drive systems working in strict correlation to ensure sufficient operating parameters of the device. The article presents a method of controlling a drive system in which two propulsion systems with PMSM engines were used. These devices are communicated with each other by a serial bus, by means of which data necessary for the correct operation of motors connected by a drive belt are transmitted. Since these machines affect both the working machine and each other, it is necessary to optimise such a system so as to avoid excessive oscillation of the drive torque in the system.
Źródło:
Archives of Electrical Engineering; 2019, 68, 1; 47-62
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual dynamic approach to shape optimization
Autorzy:
Fulmański, P.
Nowakowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/969944.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
control
deformation
dual dynamic programming
shape functional
Opis:
We consider the control problem with multidimensional integral functional where state and control satisfy a system of the first order hyperbolic PDE. Next, a type of deformation with control of the domain is described and then we define suitable shape functional. Having defined trajectory and control of deformation the dual dynamic programming tools are applied to derive optimality condition for the shape functional with respect to such a deformation.
Źródło:
Control and Cybernetics; 2006, 35, 2; 205-218
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
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