2014 - Repozytorium publikacji - Politechnika Gdańska

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Local hidden–variable models for entangled quantum states
- Remigiusz Augusiak
- Maciej Demianowicz
- Antonio Acín
2014 Journal of Physics A-Mathematical and Theoretical
While entanglement and violation of Bell inequalities were initially thought to be equivalent quantum phenomena, we now have different examples of entangled states whose correlations can be described by local hidden-variable models and, therefore, do not violate any of the Bell inequalities. We provide an up-to-date overview of the existing literature regarding local hidden-variable models for entangled quantum states, in both the bipartite and multipartite cases, and discuss some of the most relevant open questions in this context. Our review covers twenty five years of this line of research, beginning with the seminal work by Werner (1989 Phys. Rev. A 40 8), which provided the first example of an entangled state with a local model. Wernerʼs work, in turn, appeared twenty five years after the seminal work by Bell (1964 Physics 1 195), about the impossibility of recovering the predictions of quantum mechanics using a local hidden-variable theory.
Local impedance imaging of boron-doped polycrystalline diamond thin films
- Artur Zieliński
- Robert Bogdanowicz
- Jacek Ryl
- Łukasz Burczyk
- Kazimierz Darowicki
2014 Pełny tekst APPLIED PHYSICS LETTERS
Local impedance imaging (LII) was used to visualise surficial deviations of AC impedances in polycrystalline boron-doped diamond (BDD). The BDD thin film electrodes were deposited onto the highly doped silicon substrates via microwave plasma-enhanced CVD. The studied boron dopant concentrations, controlled by the [B]/[C] ratio in plasma, ranged from 1 × 1016 to 2 × 1021 atoms cm−3. The BDD films displayed microcrystalline structure, while the average size of crystallites decreased from 1 to 0.7 μm with increasing [B]/[C] ratios. The application of LII enabled a direct and high-resolution investigation of local distribution of impedance characteristics within the individual grains of BDD. Such an approach resulted in greater understanding of the microstructural control of properties at the grain level. We propose that the obtained surficial variation of impedance is correlated to the areas of high conductance which have been observed at the grain boundaries by using LII. We also postulate that the origin of high conductivity is due to either preferential boron accumulation, the presence of defects, or sp2 regions in the intragrain regions. The impedance modulus recorded by LII was in full agreement with the bulk impedance measurements. Both variables showed a decreasing trend with increasing [B]/[C] ratios, which is consistent with higher boron incorporation into BDD film.
Local properties of organic coatings close to glass transition temperature
- Michał Szociński
- Kazimierz Darowicki
2014 PROGRESS IN ORGANIC COATINGS
Acrylic coating applied on copper substrate has been investigated at different temperatures starting from the ambient one up to the level above the glass transition temperature. Its local topographic and electric properties have been examined with the atomic force microscopy (AFM) based approach including dc current mapping and local impedance spectroscopy. The local findings have been compared with the information from global impedance examination. It was possible to distinguish defected, lower-impedance regions of the coating from intact, high-impedance ones, thus overcoming the averaging shortage of global impedance measurements. Thanks to application of the AFM-based approach a phenomenon of gradual closing of coating defects has been discovered as polymer material began to enter the glass transition region. Such behavior has been attributed to increasing plasticity and flow of polymer upon heating.
Local-Global Space Mapping for Rapid EM-Driven Design of Compact RF Structures
- Adrian Bekasiewicz
- Sławomir Kozieł
2014
In this work, we introduce a robust and efficient technique for rapid design of compact RF circuits. Our approach exploits two-level space mapping (SM) correction of an equivalent circuit model of the structure under design. The first SM layer (local correction) is utilized to ensure good matching between the equivalent circuit and the electromagnetic model at the component level. On the other hand, the global correction allows for taking into account the electromagnetic couplings between the components. The important advantage of decomposing the low-fidelity model correction into local and global level is that small number of parameter is utilized at each stage, which substantially simplifies and speeds up the parameter extraction procedure. Another advantage is that the local-global SM results in considerably better generalization capability of the surrogate model (as compared to conventional SM). This leads to improved reliability of the optimization process and its reduced computational cost. The proposed technique is validated using an example of a compact microstrip rat-race coupler (RRC) and compared to previous surrogate-assisted attempts to compact RF structure optimization, including implicit SM and sequential SM.
Localization Factors for Outsourcing and Offshoring Projects in the V4 Countries. An Attempt of Initial Investigation
- Mateusz Muchlado
- Piotr Grudowski
2014
Main objective of this paper is to present the conditions for the investors in the context of outsourcing or offshoring provided by V4 countries in order to present similarities and opposites between analyzed countries and to identify good and bad sides of investing in particular Visegrad group country.
Localization of impulsive disturbances in archive audio signals using predictive matched filtering
- Maciej Niedźwiecki
- Marcin Ciołek
2014
The problem of elimination of impulsive disturbances from archive audio signals is considered and its new solution, called predictive matched filtering, is proposed. The new approach is based on the observation that a large percentage of noise pulses corrupting archive audio recordings have highly repetitive shapes that match several typical “patterns”, called click templates. To localize noise pulses, click templates can be correlated with the sequence of multi-step-ahead prediction errors yielded by the model-based signal predictor. It is shown that predictive matched filtering is an efficient and computationally affordable disturbance localization technique - when combined with the classical detection method based on autoregressive modeling, it can significantly improve restoration results.
Locking effects in finite elemnt method
- Andrzej Ambroziak
2014
In the present paper a short survey of the locking effect literature is given. As this area of scientific research is still developing, the author of the paper restricted it to about 70 papers. This study is proposed as an introduction to the comprehensive investigation of locking effects.
Logistical Aspects of Energy Conversion Efficiency in Marine Steam Power Plants in Off-Design Conditions
- Tomasz Kowalczyk
- Janusz Badur
2014 Logistyka
The paper presents logistical aspects of energy conversion efficiency in off-design conditions. The main part of the article is based on results of thermodynamic calculation for large propulsion steam turbine under partial loads. Calculations are made on extended mathematical model of two proposed steam turbine thermodynamic cycles using Stodola’s cone law. The conclusion based on calculation re-sults contains importance of off-design calculations on energy conversion efficiency in aspects of trans-port and logistics profitability and sustainable development postulates.
Logistics aspects in the group of health care accreditation standards associated with patient nutrition
- Grzegorz Zieliński
2014 Logistyka
Medical services are currently one of the more popular branches of the service sector, both in Poland and worldwide. Along with direct impact on human health and life, they have influence on the necessity of constant search for forms of their improvement. Actions taken for improvement of health services quality are implemented with diversity, both as an obligatory action imposed in all medical services units, as well as, actions undertaken individually by particular institutions. One of the more common improvement activities is to adapt to accreditation standards. The purpose of this article is therefore an attempt to identify the key fields within logistics which occur in the group of accreditation standards related to the patient nutrition.
Logistyka robót budowlanych. Projektowanie i realizacja zgodne z systemem zarządzania jakością ISO 9000
- Anna Jakubczyk-Gałczyńska
- Agata Siemaszko
2014 Logistyka
Projektowanie i zarządzanie w budownictwie dotyczy nie tylko samej realizacji określonego obiektu inżynierskiego, ale jest też ściśle związane z planowaniem logistycznym. Logistyka przedsięwzięcia budowlanego polega na zaprojektowaniu m.in. placu budowy, planu transportu zamówień oraz sposobu przemieszczania na terenie budowy zarówno pojazdów, materiałów, jak i pracowników. W artykule przedstawiono ideę systemu zarządzania jakością w kontekście działań logistycznych. Szczególnie ważnym elementem projektowania robót jest wybór metody organizacji oraz harmonogramowanie prac z uwzględnieniem zapasów czasu. Autorki koncentrują się główne na zagadnieniach integralności pomiędzy projektem a realizacją zgodnie z systemem zapewnienia jakości. Niestety w praktyce część elementów dokumentacji zostaje jedynie wykorzystana formalnie. Występują też niezgodności między projektem a wykonawstwem np. niektóre prace są wykonywane w innym terminie lub technologii niż zaplanowano. Dodatkowe niespójności powstają wtedy, gdy pojawia się problem deficytu wykwalifikowanych pracowników, sprzętu czy materiałów budowlanych. Wprowadzenie systemu zarządzania jakością działań logistycznych zgodnie z normami ISO 9000 może stanowczo zminimalizować prawdopodobieństwo niepowodzeń, błędów w wykonaniu czy przesunięć terminów realizacji całej inwestycji.
Lojalność w społeczeństwie informacyjnym na przykładzie "pokolenia Milenium"
- Edyta Gołąb-Andrzejak
2014 MARKETING I RYNEK
W artykule podjęto rozważania dotyczące zagadnienia lojalności w obecnym społeczeństwie informacyjnym. Powszechnie panująca konsumpcja oraz „zalew informacyjny”, wynikający z wykorzystywania nowoczesnych technologii w zakresie komunikacji sprawiły, że postanowiono sprawdzić, czy wciąż możemy mówić o lojalności klientów. Pokoleniem, które stanowi ważny segment rynku i jednocześnie podmiot analizy, jest pokolenie Y, tzw. „Millenium generation”. W artykule został ukazany stan obecnej wiedzy na temat tego pokolenia oraz jego lojalności.
Lokalizacja obiektów budowlanych w pobliżu linii 110 kV
- Marek Olesz
2014 Pełny tekst Inżynier Budownictwa
W artykule podano minimalne odległości obiektów budowlanych od przewodów linii wysokiego napięcia 110 kV. Dla określonej konfiguracji przestrzennej obiektu budowlanego wykonano obliczenia rozkładu pola elektrycznego i magnetycznego w otoczeniu budynku.
Lokalizowanie terminala ruchomego w sieciach LTE
- Paweł Gadka
2014 Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
W artykule przedstawiono zagadnienie lokalizowania terminali w sieciach komórkowych, omówiono architekturę, metody i główne protokoły procesu lokalizowania w sieci LTE. Na końcu omówiono szczegółowo metodę OTDoA oraz zaprezentowano przykładowy przepływ informacji w procesie lokalizowania terminala ruchomego.
Lokalny Program Rewitalizacji dla Miasta Wejherowa na lata 2015- 2020
- Piotr Lorens
- Sławomir Ledwoń
- Katarzyna Kiełbińska
2014
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Lokalny Program Rewitalizacji Miasta Wejherowo na lata 2015 - 2022 : Podsumowanie I etapu prac
- Piotr Lorens
- Sławomir Ledwoń
- Katarzyna Kiełbińska
- Dagmara Rapińczuk
2014
Dokument stanowi podsumowanie prac nad analizą wskaźnikową dla miasta Wjherowa
Long-distance quantum communication over noisy networks without long-time quantum memory
- Paweł Mazurek
- Andrzej Grudka
- Michał Horodecki
- Paweł Horodecki
- Justyna Łodyga
- Łukasz Pankowski
- Anna Przysiężna
2014 Pełny tekst PHYSICAL REVIEW A
The problem of sharing entanglement over large distances is crucial for implementations of quantum cryptography. A possible scheme for long-distance entanglement sharing and quantum communication exploits networks whose nodes share Einstein-Podolsky-Rosen (EPR) pairs. In Perseguers et al. [Phys. Rev. A 78, 062324 (2008)] the authors put forward an important isomorphism between storing quantum information in a dimension D and transmission of quantum information in a D+1 -dimensional network. We show that it is possible to obtain long-distance entanglement in a noisy two-dimensional (2D) network, even when taking into account that encoding and decoding of a state is exposed to an error. For 3D networks we propose a simple encoding and decoding scheme based solely on syndrome measurements on 2D Kitaev topological quantum memory. Our procedure constitutes an alternative scheme of state injection that can be used for universal quantum computation on 2D Kitaev code. It is shown that the encoding scheme is equivalent to teleporting the state, from a specific node into a whole two-dimensional network, through some virtual EPR pair existing within the rest of network qubits. We present an analytic lower bound on fidelity of the encoding and decoding procedure, using as our main tool a modified metric on space-time lattice, deviating from a taxicab metric at the first and the last time slices.
Longitudinally magnetized left-handed cylindrical ferrite coupled line junction for nonreciprocal devices
- Adam Kusiek
- Wojciech Marynowski
- Jerzy Mazur
2014
This paper presents investigations of longitudinally magnetized left-handed cylindrical ferrite coupled line junction for nonreciprocal devices. The proposed junction is formed as a quasi periodic arrangement of N unit cells. Each unit cell is realized as a cascade of short cylindrical ferrite coupled lines with reactance circuit composed of series capacitors and parallel inductors. The left-handed cylindrical junction with π/4 Faraday rotation was designed with the use of own software. Promising results concerning size reduction of the ferrite junction in comparison to known in literature conventional one were obtained. In order to examine nonreciprocal properties of the designed junction its calculated scattering parameters were used to predict the behavior of three-port circulator. The obtained re-sults confirmed usefulness of the proposed left-handed cylindrical junction in the design of Faraday nonreciprocal devices.
Low energy electron attachment to platinum(II) bromide (PtBr2)
- K. Tanzer
- Andrzej Pelc
- S .e. Huber
- Małgorzata Śmiałek-Telega
- Paul Scheier
- M. Probst
- S. Denifl
2014 INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
tDissociative electron attachment to PtBr2in the gas phase was studied in the low electron energy rangefrom zero up to 10 eV with an energy resolution of 150 meV. The experiments were carried out using ahemispherical electron monochromator coupled with a quadrupole mass spectrometer and pulse count-ing acquisition system. The only anion observed was Br−. This ion is formed at three resonance electronenergies: 0.4 eV, 1.2 eV and 7 eV. By the measurements of the Br−formation at different sample tem-peratures (in the 350–430 K range) the 0.4 eV resonance was associated with the electron capture byHBr generated in the apparatus at elevated temperatures. In addition, the thermodynamic thresholds fordissociative electron attachment reactions for platinum(II) bromide were calculated and compared withthe experimental results.
LOW NOISE TIRES FOR HYBRID AND ELECTRIC VEHICLES
- Jerzy Ejsmont
- Beata Świeczko-Żurek
- Stanisław Taryma
2014
Low Emission Vehicles that are hybrid and electric cars may benefit from specially designed tires that are optimized for driving conditions typical for such vehicles. It is possible that in the future Low Emission Vehicles, especially passenger cars, will substitute conventional vehicles in all applications, however for the time being they are mostly used in urban and suburban areas. Urban traffic has a rather low demand for grip performance of tires due to relatively low speeds. At the same time it imposes high demands for low noise emission of tires, as traffic noise is one of the most difficult environmental problem in towns. For electric vehicles there is also a very high need to ascertain necessary vehicle's range of operation by lowering the rolling resistance of tires as much as possible. The paper discusses selected aspects of hybrid and electric tires’ use and presents results of noise measurements performed for tires that are specially designed for LEV's or that are commonly used in such vehicles. The measurements were performed both at the laboratory using roadwheel facilities with drums covered by replica road surfaces and on the road by the Close Proximity Method. As supplementary information, to prove that there is no conflict between low noise and low rolling resistance tires, rolling resistance of tested tires is presented.
Low-cost EM-Simulation-based Multi-objective Design Optimization of Miniaturized Microwave Structures
- Sławomir Kozieł
- Adrian Bekasiewicz
- Piotr Kurgan
- Leifur Leifsson
2014
In this work, a simple yet reliable technique for fast multi-objective design optimization of miniaturized microwave structures is discussed. The proposed methodology is based on point-by-point identification of a Pareto-optimal set of designs representing the best possible trade-offs between conflicting objectives such as electrical performance parameters as well as the size of the structure of interest. For the sake of computational efficiency, most operations are performedon suitably corrected equivalent circuit model of the structure under design. Model correction is implemented using a space mapping technique involving, among others, frequency scaling. Our approach is demonstrated using a compact rat-race coupler. For this specific example, a set of ten designs representing a Pareto set for two objectives (electrical performance and the layout area) is identified at the cost corresponding to less than thirty high-fidelity EM simulations of the structure.