Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

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

/5

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Skocz do pozycji: 3.

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

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Skocz do pozycji: 4.

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

/5

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Skocz do pozycji: 5.

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

/5

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Skocz do pozycji: 6.

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

/5

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Skocz do pozycji: 7.

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

/5

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Skocz do pozycji: 8.

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

/5

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Skocz do pozycji: 9.

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

/5

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Skocz do pozycji: 10.

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

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Skocz do pozycji: 11.

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

/5

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Skocz do pozycji: 12.

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

/5

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Skocz do pozycji: 13.

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

/5

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Skocz do pozycji: 14.

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

/5

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Skocz do pozycji: 15.

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

/5

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Skocz do pozycji: 16.

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

/5

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Skocz do pozycji: 17.

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

/5

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Skocz do pozycji: 18.

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

/5

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Skocz do pozycji: 19.

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

/5

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Skocz do pozycji: 20.

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

/5

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Skocz do pozycji: 21.

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

/5

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Skocz do pozycji: 22.

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

/5

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Skocz do pozycji: 23.

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

/5

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Skocz do pozycji: 24.

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

/5

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Skocz do pozycji: 25.

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

/5

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Skocz do pozycji: 26.

Tytuł:

Adherence of minimizers for dual convergences

Autorzy:

Dolecki, S.

Powiązania:

https://bibliotekanauki.pl/articles/970255.pdf

Data publikacji:

2007

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

stability of minimizers
continuous convergence
dual topologies

Opis:

It is proved that many known convergences (e.g., continuous convergence, Isbell topology, compact-open topology, point-wise convergence) on the space of continuous maps (valued in a topological space) can be represented as the dual convergences with respect to collections of families of sets, and that they can be characterized in terms of the corresponding hyperspace convergences of the inverse images of closed sets. As a result, the convergence of real-valued functions for a dual convergence implies the convergence of their sets of minima on the corresponding hyperspace.

Źródło:

Control and Cybernetics; 2007, 36, 3; 647-658
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Concept of a multi-fuel, low-power generator with a self-ignition, common rail gas engine

Autorzy:

Piętak, A.
Imiołek, M.
Imiołek, A.

Powiązania:

https://bibliotekanauki.pl/articles/247142.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

dual-fuel feeding
CNG
steering
renewable fuel

Opis:

An idea of using biomass for generating electricity and heat leads to new solutions for power generators, adapted to be supplied with gaseous and liquid biofuels. At present, there is a growing interest in low-power generators. This type of energy production is termed 'scattered energy generation'. It is expected that generating energy in small units situated close to energy consumers may bring about substantial benefits. It is assumed that in a scattered energy generation system, energy will be produced from local fuels, such as broadly understood biomass as a primary component for production of gaseous and liquid biofuels to power low-power energy generators. An adequate amount of biomass must be secured to ensure that biogas can be produced all year round. The easiest way to store highly efficient biomass is to ensile maize and rye as well as grass. The amounts of biogas obtained from these two types of silage are comparable. Using rye as a renewable energy source for production of either bioethanol or biogas is economically viable for at least two reasons: rye grows on poor class soils and rye cultivation technology can be reduced to just nitrogen fertilization. In conclusion, it seems reasonable to generate energy in Poland in scattered energy generation systems from crops grown for this purpose. Currently, gas-powered engines are being in several ways.

Źródło:

Journal of KONES; 2011, 18, 4; 349-356
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

The effect of methanol-diesel combustion on performance and emissions of a direct injection diesel engine

Autorzy:

Tutak, W.
Szwaja, S.

Powiązania:

https://bibliotekanauki.pl/articles/241919.pdf

Data publikacji:

2015

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

dual-fuel engine
exhaust emission
modelling
diesel

Opis:

The results of CFD modelling a dual fuel diesel engine powered with both methanol and diesel fuel is presented in the paper. Modelling was performed with 20 and a 50% energetic share of methanol in the entire dose. The analysis was conducted on both the thermodynamic parameters and exhaust toxicity of dual fuel engine. It was found that the various share of methanol influences the ignition delay of the combustion process and after start of main phase of combustion, the process occurs faster than in case of the diesel engine. It was found that the time of 10-90% burn of the fuel is much shorter than it is in the diesel engine. The dual fuel engine was characterized by higher indicated mean pressure in the whole range of diesel fuel injection timings. While analysing toxic exhaust emission from the dual fuel engine powered with methanol, it was found that the rate of NO formation was significantly higher than from the diesel engine. The combustion process in the dual fuel engine occurs more rapidly than in the conventional diesel engine, which contributes to form areas with high temperature, and in combination with presence of oxygen from the air and oxygen bonded in the methanol, promotes the NO formation. In the case of the dual fuel engine, it was found that soot emission was reduced. The engine running with diesel injection start at 8.5 deg before TDC, the soot emissions were more than twice lower in the dual fuel engine, while the emission of NO was much higher.

Źródło:

Journal of KONES; 2015, 22, 2; 259-266
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Dual fuelling CI engine with methanol and diesel oil

Autorzy:

Stelmasiak, Z.

Powiązania:

https://bibliotekanauki.pl/articles/242614.pdf

Data publikacji:

2013

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

dual fuel
alcohol
methanol
thermal efficiency
toxity

Opis:

Dual fuel compression ignition engine can be run on diverse fuels, both gaseous and liquid ones. Alternative fuels to the Diesel oil feature, as a rule, low cetane number and high temperature of self-ignition. Due to this, such fuels can not be ignited spontaneously and require ignition from small dose of the Diesel oil. In the dual fuel system, as the main fuel can be considered a liquid fuels, which can be supplied to the cylinder in form of vapours, or injected be to the suction manifold. Methyl and ethyl alcohols, or their esters, can be counted among future fuels. Such alcohols can be either the main fuels or small additions improving combustion of the Diesel oil. In the paper are presented test results of the SW 680 engine run on methanol and Diesel oil. Methanol was supplied to the suction manifold in form of methanol-air aerosol. Energetic fraction of the methanol amounted to 12-50%, depending on engine load. Performed tests have shown advantageous effect of the methanol on performance of the engine. One confirmed considerable growth of overall efficiency of the engine in area of higher loads (3-6%), reduction of smokiness of exhaust gases achieved as early as with small additives of the methanol (2-3 times), reduction of CO and CO2 emissions, reduction of exhaust gases temperature. Small addition of the methanol affects advantageously on combustion of the Diesel oil, shortening time if its combustion. Addition of the methanol enables maintaining effective power of the engine fuelled traditionally, and even its slight growth. Cost of adaptation to dual fuel supply with alcohol are low, and such type of fuelling can be easy implemented in already operated compression ignition engines.

Źródło:

Journal of KONES; 2013, 20, 3; 387-393
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Jaki w polskich warunkach powinien być tramwaj dwusystemowy?
What tram-train should be in Polish conditions?

Autorzy:

Dąbrowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/251420.pdf

Data publikacji:

2014

Wydawca:

Instytut Naukowo-Wydawniczy TTS

Tematy:

tramwaj dwusystemowy
Polska
dual-system tram
Polska

Opis:

Niebawem minie już ćwierć wieku od wprowadzenia do eksploatacji w niemieckim mieście Karlsruhe tramwaju poruszającego się po znajdujących się w tym mieście torach tramwajowych oraz kolejowych, dzięki czemu uzyskano bezprzesiadkowe połączenie z miastem Bretten.

Źródło:

TTS Technika Transportu Szynowego; 2014, 1-2; 57-64
1232-3829
2543-5728

Pojawia się w:

TTS Technika Transportu Szynowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Energy Analysis of Cavitation Bubbles Under Dual-Frequency Acoustic Excitation

Autorzy:

Lv, Liang
Hu, Kai
Liu, Fei
Li, Yawei
Cui, Bing

Powiązania:

https://bibliotekanauki.pl/articles/31339947.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

dual-frequency acoustic excitation
power
sonoluminescence
sonochemistry

Opis:

Cavitation has been widely used in wastewater degradation, material synthesis and biomedical field under dual-frequency acoustic excitation. The applications of cavitation are closely related to the power (i.e. the rate of internal energy accumulation) during bubble collapse. The Keller–Miksis equation considering liquid viscosity, surface tension and liquid compressibility is used to describe the radial motion of the bubble. The model is built in predicting the power during bubble collapse under dual-frequency acoustic excitation. The influences of parameters (i.e. phase difference, frequency difference, and amplitude ratio) on the power are investigated numerically. With the increase of phase difference, the power can be fluctuated in a wide range at all conditions. Three typical characteristics of the power appear under the effects of frequency difference and amplitude ratio. With the increase of amplitude ratio, if the frequency difference is small, the power has two maximum values; and if the frequency difference is medium, there is a maximum value. Otherwise, the power monotonously decreases. The results can provide theoretical references for the selections of experimental parameters of sonoluminescence and sonochemistry in the dual-frequency acoustic field.

Źródło:

Archives of Acoustics; 2022, 47, 4; 513-518
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Rola studiów dualnych w kształtowaniu zasobów rynku pracy na przykładzie modelu niemieckiego

Autorzy:

Piwowarczyk, Anna

Powiązania:

https://bibliotekanauki.pl/articles/2108261.pdf

Data publikacji:

2022-06-30

Wydawca:

Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie

Tematy:

modele kształcenia dualnego
studia dualne w Niemczech
studia ekonomiczne
dual education models
economic studies
dual studies in Germany

Opis:

Głównym celem artykułu jest przedstawienie niemieckiego modelu kształcenia dualnego na studiach wyższych ekonomicznych oraz odpowiedź na pytanie o to, czy studia dualne rozwijają postawy przedsiębiorcze studentów. Na podstawie sformułowanego celu przyjęto hipotezę, że studia dualne rozwijają postawy przedsiębiorcze studentów. Badania oparte zostały na analizie danych wtórnych: informacjach udostępnianych przez niemieckie Ministerstwo Nauki i Edukacji, raportach Komisji Europejskiej, literaturze naukowej oraz treściach udostępnianych na stronach internetowych przedsiębiorstw i uniwersytetów oferujących omawiany model kształcenia. W artykule skoncentrowano się na wybranych przykładach realizacji akademickiego szkolnictwa zawodowego. Na podstawie analizy wyników badań można stwierdzić, że studia dualne rozwijają postawę przedsiębiorczości wśród studentów uczelni ekonomicznych. Artykuł stanowi pokłosie badań, które zostały zrealizowane w ramach w projektu DIALOG 0054/2019, pt.: „Uniwersytet przyszłości - Innowacyjny model dualnego kształcenia na studiach ekonomicznych wspomagany infrastrukturą badawczą” finansowanego przez Ministra Nauki i Szkolnictwa Wyższego.
The main objective of the article is to present the German model of dual education in higher economic studies and to answer the question whether dual studies develop students’ entrepreneurial attitudes. Based on the formulated aim, the hypothesis that dual studies develop students’ entrepreneurial attitudes was accepted. The research is based on the analysis of secondary data: information provided by the german Ministry of Science and Education, reports of the European Commission, scientific literature and content provided on the websites of companies and universities offering this model of education. The article focuses on selected examples of the implementation of academic vocational training. Based on the analysis of research results, it can be concluded that dual studies develop an entrepreneurial attitude among students of economic universities. The article is the result of research, which was carried out within the project DIALOG 0054/2019, entitled: “University of the future - Innovative model of dual education in economic studies supported by research infrastructure” funded by the Minister of Science and Higher Education.

Źródło:

Przedsiębiorczość - Edukacja; 2022, 18, 1; 146-158
2083-3296
2449-9048

Pojawia się w:

Przedsiębiorczość - Edukacja

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Dual-control missile guidance: a simulation study

Autorzy:

Bużantowicz, W.
Pietrasieński, J.

Powiązania:

https://bibliotekanauki.pl/articles/281826.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

dual-control missile
autopilot
guidance
miss distance

Opis:

Theoretical considerations and a simulation study concerning description and analysis of new autopilot structures and issues relating to conversion of guidance commands into deflections of a complex system of control surfaces aimed at minimizing the miss distance value are presented in this paper. Due to nonlinear and nonstationary nature of the phenomena associated with the guidance process, a significant role is assigned to simulation studies. A comparative analysis has been made of the guidance processes of three models of a dual-control missile, which differ in terms of formulae implemented in the control command converters.

Źródło:

Journal of Theoretical and Applied Mechanics; 2018, 56, 3; 727-739
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Innowacyjna uniwersalna lokomotywa dwunapędowa
Innovative universal dual - drive locomotive

Autorzy:

Michalak, Piotr
Jakuszko, Wojciech

Powiązania:

https://bibliotekanauki.pl/articles/249155.pdf

Data publikacji:

2019

Wydawca:

Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej

Tematy:

lokomotywa
dwunapędowa
intermodalny
locomotive
dual-drive
intermodal

Opis:

W ramach artykułu przedstawiono główne założenia projektu lokomotywy dwunapędowej przeznaczonej do ruchu pasażerskiego i transportu intermodalnego, której konstrukcja, parametry techniczne oraz eksploatacyjne spełniać będą wymagania obowiązujących norm i przepisów. Przedstawiono także schemat blokowy układu napędowego oraz opisano analizy symulacyjne wykonane w czasie realizacji prac. Artykuł zawiera również opisy rozmieszczenia głównych zespołów i urządzeń w przedziale maszynowym oraz w kabinach maszynisty. Ponadto opisano charakterystyki trakcyjne lokomotywy i przedstawia podstawowe dane techniczne. W podsumowaniu artykułu nakreślono zalety stosowania lokomotywy dwunapędowej w ruchu kolejowym i potencjalne zadania przewozowe do realizacji. Opisany projekt realizowany jest 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 projektu są Pojazdy Szynowe PESA Bydgoszcz S.A. i Sieć Badawcza Łukasiewicz – Instytut Pojazdów Szynowych „TABOR” w Poznaniu.
As a part of the article the main assumptions of the project of dual-drive locomotive intended for the passenger traffic and intermodal transport, whose construction, technical and operational parameters will meet the requirements of applicable standards and regulations, are presented. The block diagram of driving system is presented and simulation analyses carrying out during realization of works is also described. The article also contains the descriptions of arrangement of main assemblies and devices in the machine room and in the driver’s cabs. Moreover, it describes the traction characteristics of locomotive and it presents the basic technical data. The advantages of using the dual-drive locomotive in the railway traffic and the potential transport tasks to be realized are outlined in the summary of this article. The described project is 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 Centre for Research and Development. The contractor of the project is Pojazdy Szynowe PESA Bydgoszcz S.A. and ŁUKASIEWICZ – IPS „TABOR” in Poznań.

Źródło:

Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2019, 2(119); 149-158
1231-9171

Pojawia się w:

Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Design and analysis of spoofing detection algorithms for GNSS signals

Autorzy:

Dobryakova, L.
Lemieszewski, Ł.
Ochin, E.

Powiązania:

https://bibliotekanauki.pl/articles/359990.pdf

Data publikacji:

2014

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

GNSS
GPS
NAVSTAR
GLONASS
Spoofing
Dual-Receiver

Opis:

Many civil GNSS (Global Navigation Satellite System) applications need secure, assured information for asset tracking, fleet management and the like. But there is also a growing demand for geosecurity locationbased services. Unfortunately, GNSS is vulnerable to malicious intrusion and spoofing. How can users be sure the information they receive is authentic? Spoofing is the transmission of matched-GNSS-signalstructure interference in an attempt to commandeer the tracking loops of a victim receiver and thereby manipulate the receiver’s timing or navigation solution. A spoofer can transmit its counterfeit signals from a stand-off distance of several hundred meters or it can be co-located with its victim. Spoofing attacks can be classified as simple, intermediate, or sophisticated in terms of their effectiveness and subtlety. In an intermediate spoofing attack, a spoofer synchronizes its counterfeit signals with the authentic GNSS signals so they are code-phase-aligned at the target receiver. In this paper we consider the anti-spoofing algorithms based on spoofing detection via Dual-Receiver.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 40 (112); 47-52
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Finegrained 3D differential operators hint at the inevitability of their dual reciprocal portrayals

Autorzy:

Czajko, Jakub

Powiązania:

https://bibliotekanauki.pl/articles/1065412.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Finegrained differential operators
paired dual reciprocal spaces

Opis:

Extending differential operators during transition from 3D operations to prospective 4D operations imply the need to expand their 4D range far beyond the usual set-theoretical universe from which subsets of the domain are composed. The prospective infrastructural expansion related to the attempted extending of operations virtually requires an extra dual reciprocal space and thus implies presence of a certain multispatial structure of both the mathematical- and the corresponding to it physical reality. At this point the implication is only operational for it is deduced from the attempted extension of operational domain/scope of geometric differential operator, which, in turn, demands an expansion of their range. The necessary presence of an extra space is not being postulated but emerges from comparative evaluations of differential operators. The operational necessity of presence of paired dual reciprocal spaces or quasispatial structures also generalizes contravariance for multispatiality.

Źródło:

World Scientific News; 2019, 132; 98-120
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Dual pronouns in Genesis A and B

Autorzy:

Krygier, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/2054301.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Old English
dual number
personal pronouns
Genesis

Opis:

In Old English dual personal pronouns constituted a small but significant pocket of its inflectional morphology. Their disappearance in Middle English is usually taken as evidence for their marginal and tenuous status already in the preceding centuries. They are seen as optional, poetic, and unpredictable. It is the argument of this paper on the basis of the evidence of the Old English Genesis that these claims warrant a careful revision as – at least in this one poem – there is nothing random or irregular about their use.

Źródło:

Linguistica Silesiana; 2021, 42; 7-19
0208-4228

Pojawia się w:

Linguistica Silesiana

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

The feminisation of precarity Poland compared to other countries

Autorzy:

Polkowska, Dominika

Powiązania:

https://bibliotekanauki.pl/articles/652589.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

precarity
feminisation
dual-market theory
Post-Fordism

Opis:

Precarity applies to people who, in order to survive, need to work in a low-quality job, which is uncertain, temporary, low-paid, with no prospect of promotion, no security and no contract. In this sense, the precariat is a category related mostly to the secondary segments of the labour market according to the concept of the dual labour market. It is also the universal feature of Post-Fordism and the modern working conditions in which women, more often than men are located in the “worst” segment of the labour market. In this context, it is worth noting that since the beginning of the era of globalisation, women have mostly worked in the sectors more uncertain and unstable e.g., in the service industries and trade. It has been feminisation in a double sense of the word: there have been more and more working women, on the one hand, and on the other hand, women have usually taken the flexible jobs. Most of these jobs are precarious work. Precarity combined with job insecurity and low wages leaves the workforce in this group unable to plan for their future or afford a decent life. This article attempts to prove that the threat of precarity is more probable for women than men. This claim is supported by the OECD and Eurostat data on precarity for Poland and other European countries.

Źródło:

Annales. Etyka w Życiu Gospodarczym; 2017, 20, 8; 119-135
1899-2226
2353-4869

Pojawia się w:

Annales. Etyka w Życiu Gospodarczym

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

A review of technical solutions for RCCI engines

Autorzy:

Szamrej, Grzegorz
Karczewski, Mirosław
Chojnowski, Janusz

Powiązania:

https://bibliotekanauki.pl/articles/2097649.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Naukowe Silników Spalinowych

Tematy:

HCCI
RCCI
dual-fuel
DDFS
silnik dwupaliwowy

Opis:

Engines working in dual-fuel mode need special conditions to ignite air-fuel mixture without spark plug in a good moment with high combustion efficiency. To create homogenous air-fuel mixture the conditions in the cylinder are even more demanding. Many concepts of ignition was developed, but the most effective needs perfect mixing of fuel and air, which is a serious technical challenge. Technical solutions for dual-fuel engines cover the complexity of these problems thus leading to the further development of ignition systems in internal combustion engines. Fuel supply systems, the operation strategy of them, the shape of the combustion chamber are the most important elements to change and develop for correct operation of dual-fuel engines. The literature analysis showed a small amount of research carried out to optimize the operation of dual-fuel engines The variety of engines in which a dual-fuel system can be used requires much more research about them, and solutions necessary for their correctly operation.

Źródło:

Combustion Engines; 2022, 61, 2; 36--46
2300-9896
2658-1442

Pojawia się w:

Combustion Engines

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Dualizing Distance-Hereditary Graphs

Autorzy:

McKee, Terry A.

Powiązania:

https://bibliotekanauki.pl/articles/32083836.pdf

Data publikacji:

2021-02-01

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

distance-hereditary graph
dual graph
graph duality

Opis:

Distance-hereditary graphs can be characterized by every cycle of length at least 5 having crossing chords. This makes distance-hereditary graphs susceptible to dualizing, using the common extension of geometric face/vertex planar graph duality to cycle/cutset duality as in abstract matroidal duality. The resulting “DH* graphs” are characterized and then analyzed in terms of connectivity. These results are used in a special case of plane-embedded graphs to justify viewing DH* graphs as the duals of distance-hereditary graphs.

Źródło:

Discussiones Mathematicae Graph Theory; 2021, 41, 1; 285-296
2083-5892

Pojawia się w:

Discussiones Mathematicae Graph Theory

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Some results on pseudo-Q algebras

Autorzy:

Rezaei, Akbar
Saeid, Arsham Borumand
Walendziak, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/744634.pdf

Data publikacji:

2017-12-01

Wydawca:

Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie

Tematy:

Pseudo-BCI/BCK algebra
(dual) pseudo-BCH algebra
dual pseudo-Q/QC algebra
(commutative) pseudo-CI/BE algebra

Opis:

The notions of a dual pseudo-Q algebra and a dual pseudo-QC algebra are introduced. The properties and characterizations of them are investigated. Conditions for a dual pseudo-Q algebra to be a dual pseudo-QC algebra are given. Commutative dual pseudo-QC algebras are considered. The interrelationships between dual pseudo-Q/QC algebras and other pseudo algebras are visualized in a diagram.

Źródło:

Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica; 2017, 16
2300-133X

Pojawia się w:

Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Dual hesitant pythagorean fuzzy Hamacher aggregation operators in multiple attribute decision making

Autorzy:

Wei, G.
Lu, M.

Powiązania:

https://bibliotekanauki.pl/articles/229895.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

multiple attribute decision making (MADM)
dual Pythagorean hesitant fuzzy values
dual hesitant Pythagorean fuzzy Hamacher hybrid average (DHPFHHA) operator
dual hesitant Pythagorean fuzzy Hamacher hybrid geometric (DHPFHHG) operator
power aggregation operators

Opis:

In this paper, we investigate the multiple attribute decision making (MADM) problem based on the Hamacher aggregation operators with dual Pythagorean hesitant fuzzy information. Then, motivated by the ideal of Hamacher operation, we have developed some Hamacher aggregation operators for aggregating dual hesitant Pythagorean fuzzy information. The prominent characteristic of these proposed operators are studied. Then, we have utilized these operators to develop some approaches to solve the dual hesitant Pythagorean fuzzy multiple attribute decision making problems. Finally, a practical example for supplier selection in supply chain management is given to verify the developed approach and to demonstrate its practicality and effectiveness.

Źródło:

Archives of Control Sciences; 2017, 27, 3; 365-395
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Duality and some topological properties of vector-valued function spaces

Autorzy:

Feledziak, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/746589.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Matematyczne

Tematy:

vector-valued function spaces
locally solid topologies
KB-spaces
Levy topologies
Lebesgue topologies
order dual
order continuous dual
perfectness

Opis:

Let \(E\) be an ideal of \(L^0\) over \(\sigma\)-finite measure space \((\Omega, \Sigma, \mu)\) and let \((X, \| \cdot \|_X)\) be a real Banach space. Let \(E(X)\) be a subspace of the space \(L^0(X)\) of \(\mu\)-equivalence classes of all strongly \(\Sigma\)-measurable functions \(f\colon \Omega \to X\) and consisting of all those \(f\in L^0(X)\), for which the scalar function \(\tilde{f} = \|f (\cdot)\|_X\) belongs to \(E\). Let \(E\) be equipped with a Hausdorff locally convex-solid topology \(\xi\) and let \(\xi\) stand for the topology on \(E(X)\) associated with \(\xi\). We examine the relationship between the properties of the space \((E(X), \xi)\) and the properties of both the spaces \((E, \xi)\) and \((X, \|· \|_X)\). In particular, it is proved that \(E(X)\) (embedded in a natural way) is an order closed ideal of its bidual iff \(E\) is an order closed ideal of its bidual and \(X\) is reflexive. As an application, we obtain that \(E(X)\) is perfect iff \(E\) is perfect and \(X\) is reflexive.

Źródło:

Commentationes Mathematicae; 2008, 48, 1
0373-8299

Pojawia się w:

Commentationes Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Abandoning the EPP-feature in Polish dual copula clauses by redefining the predication relation

Autorzy:

Jurczyk, Rafał

Powiązania:

https://bibliotekanauki.pl/articles/1945102.pdf

Data publikacji:

2021-12-30

Wydawca:

Katolicki Uniwersytet Lubelski Jana Pawła II

Tematy:

EPP
predication
proposition
dual copula clauses (DCCs)
Agree

Opis:

This paper questions the logic behind the presence and the working of the EPP-feature in Polish dual copula clauses (henceforth, DCCs) with the pronominal copula to, the verbal copula być ‘to be’, and two nominative 3rd person DPs, as represented in Bondaruk (2019). The criticism follows from: (i) – Chomsky’s (2000, 2001) downward Agree operation; (ii) – the view that the predicator encodes the predication relation between the pre-copular subject and the post-copular predicate; (iii) – selective multiple Agree, whereby the satisfaction of the EPP- and uφ-features is divorced. Adopting (i)–(iii), Bondaruk’s scrutiny allows either the pre- or the post-copular DP to occupy SpecTP, thereby accounting for DCCs’ agreement and configurational patterns, but, simultaneously, suffering from theoretical shortcomings it creates. We argue for a simpler satisfaction of the subject requirement which does not rely on the troublesome EPP-feature, but is motivated formally by the relation between T and the higher DP. We derive this requirement by following Zeiljstra’s (2012) upward Agree which only takes place once interpretable features c-command uninterpretable features, and Rothstein’s (2004) approach which is based on a neo-Davidsonian event semantics and which argues that be and its complement form a complex predicate, separated from the pre-copular DP both semantically and syntactically.

Źródło:

Linguistics Beyond and Within; 2021, 7; 33-57
2450-5188

Pojawia się w:

Linguistics Beyond and Within

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

A novel type of wearable dual-band antenna based on coplanar waveguide feeding for wearable wireless communications

Autorzy:

He, Zhengrui
Jin, Jie

Powiązania:

https://bibliotekanauki.pl/articles/1835773.pdf

Data publikacji:

2021

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

wearable antenna
dual-band antenna
CPW-feed
metasurface

Opis:

A flexible and compact coplanar waveguide feed (CPW-fed) wearable antenna is introduced for wireless wearable communications applications at the industrial scientific medical (ISM) band. The proposed antenna consists of copper, which is used as the radiation patch and ground planes printed on the same side of polyimide flexible substrate. The overall size of the antenna is 30 mm × 28 mm × 0.08 mm, the results show that the antenna can transmit and receive signals in two frequency bands of 1.89–2.67 GHz and 3.02–3.23 GHz, in which radiating properties are characterized and agree well with the simulation results. The antenna is bent in different directions to further investigate the reflection coefficient and corresponding effect on the antenna under bending. The center frequency of the antenna is slightly shifted towards higher and lower frequencies when antenna is bent in X-axis and Y-axis, respectively. Furthermore, the wearability of the antenna is verified when the antenna is placed on different parts of the human body such as wrist and chest. Hence, the proposed flexible antenna is a suitable candidate for wearable wireless communication applications.

Źródło:

Optica Applicata; 2021, 51, 2; 159-170
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Dual-band Bisected Psi Antenna for 3G, Wi-Fi, WLAN and Wi-MAX Applications

Autorzy:

Sura, Penchala Reddy
Reddy, S. Narayana

Powiązania:

https://bibliotekanauki.pl/articles/308721.pdf

Data publikacji:

2020

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

3G
bisected psi
dual-band
stub
WLAN

Opis:

This paper presents an inexpensive and simple dual-band bisected psi antenna for 3G, Wi-Fi, WLAN, and WiMAX applications is presented. The antenna comprises a bisected psi-shaped patch on a low-price FR4 substrate with a cropped ground plane on the other side, and is fed by a 50 Ω microstrip line. It operates at two distinct frequency bands of 1.87–2.76 GHz and 5.16–5.75 GHz with |S11|≤ -10 dB.

Źródło:

Journal of Telecommunications and Information Technology; 2020, 1; 56-61
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Dual - fuel low power generator with diesel engine using alternative fuels

Autorzy:

Imiołek, M.
Piętak, A.
Imiołek, A.

Powiązania:

https://bibliotekanauki.pl/articles/246549.pdf

Data publikacji:

2012

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

alternative fuels
diesel engine
dual-fuel engine
biofuels

Opis:

At the moment, there is a growing interest in low-power generating units in dispersed system. The production of energy in small units located in the vicinity of the energy recipients offers considerable benefits. First and foremost, it lowers the cost of energy production and the cost of its transfer and also makes the recipient independent from the domestic supplier. Small cogeneration aggregates will facilitate the use of energy from dispersed renewable resources. Gas self-ignition engines in cogeneration system powered with biofuels can be used in construction industry as ecological sources of heat and electrical energy, limiting the need for fossil fuels. This paper presents the possibility of using alternative fuels for internal combustion engines. It describes the possibility of using liquid biofuels separately or natural gas fuel to power diesel engines in dual fuel system. The conception of supplying low-power generator with diesel engine with natural gas to a dose of liquid biofuels test case. Pointed to the factors determining the desirability of a particular concept. Indicated the modification of the engine power to supply the natural gas generator with a dose of liquid biofuels. New technologies of extracting and using biofuels and alternative fuels are being introduced and developed for generating heat and electric energy. Studies on the use of gas and liquid alternative fuels are directly linked to research on the production of renewable and alternative energy as well as environment protection by minimizing emissions of toxic substances into the atmosphere.

Źródło:

Journal of KONES; 2012, 19, 3; 171-176
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Biogas as a fuel for diesel engines

Autorzy:

Wierzbicki, S.

Powiązania:

https://bibliotekanauki.pl/articles/246845.pdf

Data publikacji:

2012

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

biogas
methane
diesel engine
dual-fuel supply system

Opis:

The pursuit of reduced greenhouse gas emissions, as well as the increased share of renewable fuels in the overall energy balance has led to a search for alternative energy sources. One of the fuels on which great hopes are set as fuel for engines is biomethane or biogas, whose main component is methane. Biogas can be obtained from different products by using different technologies, so that it has potential as a widelyavailable fuel, which is quite easy to produce. The percentage of methane in biogas depends on the technology for obtaining biogas and ranges from 35% to around 75%. The largest biogas sources can be animal farms, where it is obtained from animal excrement. Another source is sewage treatment plants and rubbish dumps, where substantial quantities of biogas are obtained as a result of natural processes occurring in waste dumping sites or sewage. Biogas can also be acquired from waste obtained from fruit and vegetable processing as well as waste from meat plants. This paper examines the possibility of using biogas as a fuel for diesel engines. In these engines, the combustion of biogas (methane) requires the application of a dual-fuel supply system in which liquid fuel initiating gas fuel selfignition will be injected into the combustion chamber along with methane. The paper also contains example results showing the effect of the methane dose on the course of the combustion process in diesel engines.

Źródło:

Journal of KONES; 2012, 19, 3; 477-482
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Choice of a pilot dose in dual fuel self-ignition engine of a generator, depending on its load

Autorzy:

Imiołek, M.
Piętak, A.
Śmieja, M.
Wierzbicki, S.

Powiązania:

https://bibliotekanauki.pl/articles/247241.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

combustion engine
gas engine
dual fuel powering
CNG

Opis:

One of the basic problems concerning dual fuel powering of self-ignition engines is to determine the minimal dose of diesel oil injected into the combustion chamber in order to trigger self-ignition. Most research conducted to date on double-fuel powering self-ignition has been carried out on engines with mechanical injection systems, which does not ensure the possibility of obtaining very small diesel oil doses initiating self-ignition. The original system of fuelling the engine with diesel oil was replaced with a laboratory Common Rail system. The basic parameters of injector operation were controlled by a specially-developed system ensuring continuous choice of parameters of injector operation. The examined engine was fitted with a prototypical system of methane-air fuelling and a system for controlling and adjusting the supplied dose of methane This study presents the results of research aiming at determining the pilot dose injected into the combustion chamber of the engine to ensure the course of combustion in the engine operating under various loads. The results presented in the paper concern tests of a single-cylinder self-ignition engine, HATZ 1B40, operating in a generator adopted for CNG fuelling.

Źródło:

Journal of KONES; 2011, 18, 4; 129-136
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

You are so kind – and I am kind and smart: Actor – Observer Differences in the Interpretation of On-going Behavior

Autorzy:

Abele, Andrea E.
Bruckmüller, Susanne
Wojciszke, Bogdan

Powiązania:

https://bibliotekanauki.pl/articles/430804.pdf

Data publikacji:

2014-12-01

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

actor-observer differences
agency
communion
dual perspective model

Opis:

: The dual perspective model of agency and communion predicts that observers tend to interpret a target’s behavior more in terms of communion than agency, whereas actors interpret their behavior more in terms of agency. The present research for the first time tests this model in real interactions. Previously unacquainted participants had a short conversation and afterwards rated their own behavior (actor perspective) and their interaction partner’s behavior (observer perspective) in terms of agency(self-confident, assertive) and communion(trustworthy, empathic). Supporting the dual perspective model, observers rated the actor’s behavior higher on communion than on agency, and higher on communion than actors themselves did. Findings for actors were more complex: Actors rated their own behavior as more agentic than observers did. However, they also rated their behavior high on communion. We discuss implications for the dual perspective model as well as for (mis)understandings in social interactions.

Źródło:

Polish Psychological Bulletin; 2014, 45, 4; 394-401
0079-2993

Pojawia się w:

Polish Psychological Bulletin

Dostawca treści:

Biblioteka Nauki

/5

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