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Search results for: CHARGE CARRIER MOBILITY

  • Structures for parameterization, meshing and data exchange of topologically related surfaces of a ship hull

    Publication

    - Year 2010

    This paper presents proposal of data structures for storage and processing of a parametric three-dimensional model of a midship hull sections. The model consists of coarse surfaces like: decks, frames, girders, stiffeners, brackets, partitions etc. bounded by topological relations. All workshop details are omitted as the model is intended for numeric calculations. Proposed data structures are prepared to facilitate changes in the...

  • Selective detection of F- by chromogenic tetrazole receptor

    A chromogenic anion host 4, containing two amide functionalities linked to azo dye and tetrazole rings was synthesized and its complexes with various anions were investigated. The results show that receptor 4 can recognize selectively biologically important F- ion. The binding affinity for F- was investigated by naked-eye colour change, UV-Vis and 1H NMR spectroscopy. Addition F- ion in CH3CN and DMSO to receptor 4 cause a colour...

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  • High Frequency Harmonics Emission of Modern Power Electronic AC-DC Converters

    Publication

    - Year 2013

    Modern AC/DC converters with bidirectional power flow employing PWM boost topology generate harmonic distortions of input current in relatively high frequency range tightly related to modulation carrier frequency. These frequencies and its multiples in typical applications are usually located in frequency range from single up to several of kHz. Increased harmonic emission in this frequency range can easily and harmfully influence...

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  • Impact analysis of surface roughness of the plate-plate measuring system on resistance torque in interaction with MR fluid

    Publication

    - TRIBOLOGIA - Year 2024

    Magnetorheological (MR) fluids are complex suspensions of magnetic particles in a non-magnetic carrier fluid. They exhibit ‘smart’ properties that enable them to change their rheological parameters in response to a change in the external magnetic field applied. This behavior is used in some engineering solutions, e.g. MR clutches or brakes. For such systems to work correctly, the resistance torque achieved by contact with the...

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  • Permeation and sorption properties of poly(ether-block-amide) membranesfilled by two types of zeolites

    Publication
    • K. Friess
    • V. Hynek
    • M. ŠíPEK
    • W. Kujawski
    • O. Vopička
    • M. Zgažar
    • M. Kujawski

    - SEPARATION AND PURIFICATION TECHNOLOGY - Year 2011

    The experimental study of transport properties of mixed matrix membranes (MMMs) based on PEBA-4033 with two types of zeolites is reported. Gas (CO2, O2, N2) and vapor (benzene, toluene, methanol, water) permeation measurements were performed using the differential flow permeameter at temperature of 298.15 K and at atmospheric pressure. Gas/vapor permeation was monitored by measuring the changes of the thermal conductivity of carrier...

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  • Three-dimensional mapping for data collected using variable stereo baseline

    Publication

    - Year 2016

    The paper describes a system of 3D mapping of data collected with due regard for variable baseline. This solution constitute an extension to a VisRobot sub-system developed as a subsystem, necessary for implementing the generic idea of using mobile robots to explore an indoor static environment. This subsystem is to acquire stereo images, calculate the depth in the images and construct the sought 3D map. Stereo images are obtained...

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  • Production of hydrogen from biomass and its separation using membranetechnology

    Publication

    - RENEWABLE & SUSTAINABLE ENERGY REVIEWS - Year 2018

    Hydrogen is an important raw material for chemical industry and feasible renewable energy carrier that could replace fossil fuels. However, the specie seldom exists in a form of pure H2. Therefore, to obtain hydrogen in volumes suitable to be used as a raw material it is necesary to decompose hydrogen-rich compounds. The carbohydrate-rich biomass can be an important source of hydrogen by applying the process of dark fermentation....

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  • Evaluation of RTKLIB's Positioning Accuracy Using low-cost GNSS Receiver and ASG-EUPOS

    The paper focuses on a comparison of different positioning methods provided by free and open source software (FOSS) package called RTKLIB. The RTKLIB supports real‐time and post‐processed positioning. The most important modes of operation tested by the authors are Kinematic, Static, Fixed and Precise Point Positioning (PPP). The data for evaluation were obtained from low‐cost Global Navigation Satellite System (GNSS) receiver....

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  • Electrical properties of hybrid planar diode based on palladium phthalocyanine and titanium dioxide

    This work details experimental studies of a planar diode made of indium tin oxide/titanium dioxide/palladium phthalocyanine/gold. The rectification ratio of current was 105 at 1.5 V. The analysis of the electrical properties of the system was based on small signal complex capacitance spectra measured in the frequency range of 25 Hz-1 MHz at different values of bias. No depletion region at the TiO2/PdPc interface was observed. Forward...

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  • Spillover Effect Occurrence in Tricity

    Publication
    • H. Anacka
    • X. Pérez-Sindín
    • H. Fanha Martins

    - American Journal of Ancient History - Year 2017

    The key topic of this paper is a spillover effect from multinational companies to the local business environment in Tricity. The purpose of the research is to examine whether spillover effect is present in Tricity, to what extent, and, more importantly, what should be the reaction of the local authorities to the results. Based on qualitative interview-based research conducted with the multinational corporations’ employees, spillover...

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  • Design of Resilient Vehicle-to-Infrastructure Systems

    Publication

    - Year 2020

    Vehicular ad hoc networks (VANETs) have recently gained noticeable attention due to advantages in improving road traffic safety, shaping the road traffic and providing infotainment opportunities to travellers. However, transmission characteristics following from the IEEE 802.11p standard and the high mobility of VANET nodes remarkably reduce the lifetime, reach and capacity of wireless links, and often lead to simultaneous disruptions...

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  • EMI attenuation in a DC-DC buck converter using GaN HEMT

    A dc-dc buck converter using gallium nitride (GaN) high electron mobility transistors (HEMT) is experimentally investigated at the discontinuous current mode (DCM) and at the triangular current mode (TCM) operation. The paper objective is to specify the power conversion efficiency and attenuation of common mode (CM) and differential mode (DM) noise voltage, measured at the line impedance stabilization network (LISN) for compared...

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  • Simple and low-cost wireless voting system

    This paper presents the concept of a simple and low-cost wireless voting system working in the 868 MHz frequency band. The described system is dedicated to general shareholders assemblies but it can be easily adapted for other applications. The main advantage is its simplicity and mobility as it consists solely of three components - voting modules, a base station and a PC application from which the whole system is mamaged. This...

  • Simple and low-cost wireless voting system

    Publication

    This paper presents the concept of a simple and low-cost wireless voting system working on the 868 MHz frequency band. Described system is dedicated to general shareholders assemblies but it can be easily adapted for other applications. The main advantage is its simplicity and mobility as it consists solely of three components - voting modules, base station and a PC application from which the whole system is managed. This architecture...

  • Providing Differentiated Levels of Service Availability in VANET Communications

    Publication

    Inter-vehicle communications seems to be a promising remedy not only for a number of road-safety issues, but also to improve the efficiency of road traffic, as well as to support the on-board infotainment applications. However, it often encounters disruptions due to high mobility of vehicles causing frequent failures of communication links. In this paper, we utilize the idea of multipath vehicle-to-vehicle routing to provide protection...

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  • Silver complexes stabilized by large silanethiolate ligands – crystal structures and luminescence properties

    Bulky silanethiolate and disiladithiolate ligands were applied to synthesize one mononuclear and three trinuclear silver complexes including two cyclic “microclusters” and a linear tri-nuclear silanethiolate complex. All obtained compounds are characterized by X-ray diffraction and FT-IR. NMR and emission spectroscopies were used where possible. The first trinuclear anionic silver thiolate is structurally characterized. The influence...

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  • The field–dependent interface recombination velocity for organic–inorganic heterojunction

    Publication

    We have derived an analytical formula which describes the field–dependent interface recombination velocity for the boundary of two materials characterized by different permittivities. The interface recombination of charge carriers has been considered in the presence of image force Schottky barrier. We suggest that this effect may play an important role in the loss of current for organic–inorganic hybrid heterojunctions. It has...

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  • Green aspects of techniques for the determination of pesticides in fruits and vegetables

    Publication

    - Year 2012

    Applied all over the world, pesticides are some of the most dangerous pollutants of the environment because of their stability, mobility, their ability to accumulate in the environment and their consequent long-term adverse effects on living organisms in general and human health in particular. Their presence in the environment is a particular danger. It is therefore crucial to monitor pesticide residues using all available analytical...

  • System Loss Model for Body Area Networks in Room Scenarios

    Publication
    • M. M. Ferreira
    • F. D. Cardoso
    • S. J. Ambroziak
    • M. Särestöniemi
    • L. M. Correia

    - Year 2023

    This paper presents an analysis of system loss in Body Area Networks for room scenarios, based on a wideband measurement campaign at 5.8 GHz. The measurements were performed with a fixed antenna transmitting vertically and horizontally polarised signals, while the user wears dualpolarised antennas. The average system losses in co- and crosspolarised channels are 41.4 and 42.6 dB for vertically polarised transmitted signals and...

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  • Domestic ORC micro-CHP combined with a commercial gas boiler

    Publication

    - Year 2014

    The chapter presents the results of experimental studies conducted during the launch of the first in Poland demonstration prototype of the micro ORC coupled to a domestic gas boiler. The accomplished studies indicated the possibility for the ORC module to work with such boiler (autonomous source of heat) with a prototype single-stage axial micro turbine as the expansion machine. Confirmation of that fact has been delineated in...

  • Hulajnoga. Zabawka na kółkach czy rewolucja w mobilności miejskiej?

    Publication

    Popularne wśród młodych ludzi rolki, deskorolki i hulajnogi stają się czymś więcej niż formą zabawy i mają swoją naukową nazwę: Personal Mobility Devices (PMD). Hulajnoga, jako jedno z osobistych urządzeń mobilnych, w "hybrydowym" połączeniu z transportem publicznym staje się atrakcyjną, by nie powiedzieć rewolucyjną, formą mobilności miejskiej. Eksplorację tematu i terenowe badania w pierwszych miastach rozpoczął już zawiązany...

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  • Perspectives of Transport Systems Development in the Light of Radio Communication Systems Evolution Towards 5G

    Publication

    - Year 2017

    In the paper conditions of development and implementation of transport systems with reference to the development of radio communication networks towards 5G are presented. First, general properties of next generation systems are mentioned and their architecture. Moreover, planned characteristics of B4G and 5G systems are depicted which can significantly contribute to the promotion and development of transport systems. In particular...

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  • The Impact of Organizational Culture on Bicycle Commuting Frequency: The Research Based on Example of Three IT companies

    Publication

    - Year 2015

    This chapter describes a study on work-related factors affecting employees’ decision on bicycle commuting. Employees’ transport choices are related to organizational culture. This chapter refers to E. Schein’s definition of organizational culture model. The study was made in order to determine the impact of specific levels of organizational culture on the transport behavior of employees. It is based on a survey performed in three...

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  • Quality Evaluation of Agricultural Distillates Using an Electronic Nose

    The paper presents the application of an electronic nose instrument to fast evaluation of agricultural distillates differing in quality. The investigations were carried out using a prototype of electronic nose equipped with a set of six semiconductor sensors by FIGARO Co., an electronic circuit converting signal into digital form and a set of thermostats able to provide gradient temperature characteristics to a gas mixture. A volatile fraction...

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  • Testing OFDM Transmission Schemes for Shallow Water Acoustic Communications

    Publication

    - Year 2013

    Large variability of communication properties of underwater acoustic channels, and especially strongly varying instantaneous conditions in shallow waters, is a tough challenge for the designers of underwater acoustics communication (UAC system. There is a need for developing adaptive signaling schemes that would dynamically optimize signal parameters in both physical and link layers of communication protocols. The orthogonal frequency...

  • Disaster-resilient communication networks: Principles and best practices

    Publication
    • A. Mauthe
    • D. Hutchison
    • E. Cetinkaya
    • I. Ganchev
    • J. Rak
    • J. P. Sterbenz
    • M. Gunkelk
    • P. Smith
    • T. Gomes

    - Year 2016

    Communication network failures that are caused by disasters, such as hurricanes, arthquakes and cyber-attacks, can have significant economic and societal impact. To address this problem, the research community has been investigating approaches to network resilience for several years. However, aside from well-established techniques, many of these solutions have not found their way into operational...

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  • Active Power Quality Controllers

    Publication

    - Year 2008

    Dynamic Static Synchronous Compensator is the most important controller for distribution networks and probably in SEEN. It has been widely used since the 1990s to regulate system voltage precisely, improve voltage profile, reduce voltage harmonics, reduce transient voltage disturbances and load compensation. Rather than using conventional capacitors and inductors combined with fast switches, the D-STATCOM uses a power-electronics...

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  • PROGRAMMABLE YANG - BASED INTERFACE IN CONTROL OF OPTICAL TRANSPORT NETWORK

    Since over a decade we observe intensive effort of research institutions and industrial consortia on extending flexibility and automation of the transport network control also known under the term network programmability. Key aspect of each programming interface is ability to evolve but also sensitivity to future modifications. As indicated in the past work in the specific context of optical transport networks an important criterion...

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  • Effect of Microplastics Pollution on Hydrogen Production from Biomass: A Comprehensive Review

    Hydrogen production from biomass and organic wastes is considered as a potential alternative energy source and is known as a clean and CO2-free fuel energy carrier. H2 is considered very promising among the other energy sources; therefore, the effective conversion of biomass and organic solid waste to this secondary energy source is urgently sought. As a result, it is of importance to assess the impact of the existence of microplastics...

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  • Properties of Oxygen Vacancy and Hydrogen Interstitial Defects in Strontium Titanate: DFT + Ud,p Calculations

    This work presents extensive theoretical studies focused on the mixed ion-electron transport in cubic strontium titanate (STO). A new approach to the description of this difficult system was developed within the framework of linear-scaling Kohn–Sham density functional theory, as realized in the ONETEP program. The description we present is free of any empirical parameters and relies on the Hubbard U and Hund’s J corrections applied...

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  • Spin-Resolved Band Structure of Hoffman Clathrate [Fe(pz)2Pt(CN)4] as an Essential Tool to Predict Optical Spectra of Metal–Organic Frameworks

    Publication

    - ACS Applied Materials & Interfaces - Year 2023

    Paramount spin-crossover properties of the 3D-Hoffman metalorganic framework (MOF) [Fe(pz)2Pt(CN)4] are generally described on the basis of the ligand field theory, which provides adequate insight into theoretical and simulation analysis of spintronic complexes. However, the ligand field approximation does not take into account the 3D periodicity of the actual complex lattice and surface effects and therefore cannot predict a full-scale...

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  • Controlling the europium oxidation state in diopside through flux concentration

    Publication
    • N. Górecka
    • T. Lesniewski
    • S. Mahlik
    • M. S. Łapiński
    • Y. Tsai
    • A. Bielicka-giełdoń
    • K. Szczodrowski

    - DALTON TRANSACTIONS - Year 2024

    This paper explores the connection between the H3BO3 flux concentration and the co-existence of Eu2+ and Eu3+ dopants within CaMgSi2O6 crystals (diopside). The samples were synthesised using a solid-state synthesis method under varying atmospheric conditions, including oxidative (air), neutral (N2), and reductive (H2/N2 mixture) environments. Additionally, some materials underwent chemical modification by partially substituting...

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  • Advanced Potential Energy Surfaces for Molecular Simulation

    Publication
    • A. Albaugh
    • H. Boateng
    • R. Bradshaw
    • O. Demerdash
    • J. Dziedzic
    • Y. Mao
    • D. Margul
    • J. Swails
    • Q. Zeng
    • D. Case... and 10 others

    - JOURNAL OF PHYSICAL CHEMISTRY B - Year 2016

    Advanced potential energy surfaces are defined as theoretical models that explicitly include many-body effects that transcend the standard fixed-charge, pairwise-additive paradigm typically used in molecular simulation. However, several factors relating to their software implementation have precluded their widespread use in condensed-phase simulations: the computational cost of the theoretical models, a paucity of approximate models...

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  • Wybrane wyniki badań potrzeb transportowych mieszkańców województwa pomorskiego

    Na potrzeby opracowania Planu Zrównoważonego Rozwoju Publicznego Transportu Zbiorowego Województwa Pomorskiego w czwartym kwartale 2013 roku konsorcjum Fundacji Rozwoju Inżynierii Lądowej oraz z Politechniki Gdańskiej wykonało badania potrzeb transportowych mieszkańców województwa pomorskiego oraz wielkości popytu na usługi przewozowe. Uzyskane wyniki były podstawą do budowy transportowego modelu symulacyjnego podróży realizowanych...

  • Weak localization competes with the quantum oscillations in a natural electronic superlattice: The case of Na1.5(PO2)4(WO3)20

    Publication
    • K. Kolincio
    • O. Pérez
    • E. Canadell
    • P. Alemany
    • E. Duverger-Nédellec
    • A. Minelli
    • A. Bosak
    • A. Pautrat

    - PHYSICAL REVIEW B - Year 2020

    We report an investigation of the combined structural and electronic properties of the bronze Na1.5(PO2)4(WO3)20. Its low-dimensional structure and possible large reconstruction of the Fermi surface due to charge density wave instability make this bulk material a natural superlattice with a reduced number of carriers and Fermi energy. Signatures of multilayered two-dimensional (2D) electron weak localization are consequently reported,...

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  • Red Algae – An Alternative Source of Carbon Material for Energy Storage Application

    New electrode material obtained by pyrolysis of aquatic biomass macro (red algae) soaked with glucose solution has been characterized by SEM, EDX and Raman spectroscopy. Graphitized carbon was identified by Raman spectroscopy. Galvanostatic cyclic polarization of the materials in contact with 1M LiPF6 electrolyte in EC:DMC (1:1 v/v) and Li as a counter electrode was performed. Specific capacity of the novel material was enhanced...

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  • Ammonium <i>O</i>,<i>O</i>'-diethyl dithiophosphate

    In the title compound, NH4+·(C2H5O)2PS2−, the ammonium cation is connected by four charge-assisted N−H···S hydrogen bonds to four tetrahedral O,O'-diethyl dithiophosphate anions, forming layers parallel to (100). The polar and non-polar constituents of the layers are stacked alternately along [100]. Interlacing of the external ethyl groups...

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  • Electrochemically Induced Synthesis of Triphenylamine-based Polyhydrazones

    Publication

    - ELECTROCHIMICA ACTA - Year 2017

    Triphenylamine-based hydrazones were subjected to electropolymerization process that gave well conductive hydrazone based polymers. The first example of polyhydrazone formation during the electrochemical process was shown. The estimation of polymer structure was demonstrated using IR spectroelectrochemistry. The EPR spectroelectrochemistry allowed to explain why in some cases dimer couldn’t be formed. The results of electrochemical,...

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  • Production of singlet oxygen atoms by photodissociation of oxywater

    Publication

    - JOURNAL OF CHEMICAL PHYSICS - Year 2009

    Quantum chemical calculations are reported for the energies of the few lowest electronic singlet states of oxywater along dissociation of the oxygen-oxygen bond into water and singlet oxygen using multistate multireference second-order Møller–Plesset perturbation theory. We compute an energy of 21 kcal/mol to remove one oxygen atom in the lowest singlet state. The two lowest excited singlet states have vertical excitation energies...

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  • Optimal placement of IMU sensor for the detection of children activity

    Publication

    - Year 2022

    In this paper an investigation to determine the optimal placement of IMU sensors for the purpose of children characteristic activity detection is presented. The article compares four different placement of two IMU sensors on human body. Ten healthy volunteers participated within the study. Data were collected firstly from two wireless 9-axial IMU sensors placed at the left and right wrists, then sensors were placed at lower back...

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  • Highly linear CMOS triode transconductor for VHF applications

    A high-speed, fully balanced complementary-symmetry metal-oxide-semiconductor (CMOS) triode transconductor is presented. The proposed approach exploits a pseudo-differential-pair triode configuration with a simple adaptive circuit stabilising the drain-to-source voltages of metal-oxide-semiconductor (MOS) transistors. Since no additional active circuits (apart from the resistors made of the cut-off MOS devices) and no feedback...

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  • A taxonomy of challenges to resilient message dissemination in VANETs

    Publication

    - Year 2016

    Inter-vehicular communications is seen as a promising solution to a number of issues related with public road safety, road congestion management, and infotainment. However, Vehicular Ad-hoc NETworks (VANETs) characterized by high mobility of vehicles and facing a number of other issues related with high frequency wireless communications and network disconnections, encounter major challenges related with reliability of message delivery....

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  • Deterioration of masonry structure investigated by a thermal camera with a qualitative assessment of thermal image processing

    Thermal imaging is contemporary remote sensing measurement technique, which provides an image of the temperature distribution in the measured object. The method is widely used, due to its mobility as well as the non-destructive character of the measurement. Infrared thermography is especially relevant in the inspection of insulation, what is more, it is a suitable device for detecting thermal bridges and structural changes, which...

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  • PUBLICZNE ŚRODKI TRANSPORTOWE A SAMOCHÓD ELEKTRYCZNY W OBSŁUDZE PODRÓŻY MIEJSKICH W METROPOLII TRÓJMIEJSKIEJ

    Publication

    - Year 2017

    Metropolia trójmiejska ma wyjątkowo negatywne uwarunkowania terenowe dla funkcjonowania i rozwoju sieci komunikacji publicWyznej. Dzielnice położone w tzw. dolnym tarasie są dobrze skomunikowane za pomocą linii SKM i tramwajowych. Jedynie te środki komunikacji szynowej, przy częstotliwości połączeń nie większej niż co 10 minut, są konkurencyjne dla indywidualnych dojazdów samochodami osobowymi. Natomiast autobusy i trolejbusy utykające...

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  • Integrated Three-Level Dual-Phase Inverter

    Publication

    - ENERGIES - Year 2022

    In view of reducing the number of inverter legs that provide dual-phase, three-level output voltages (as may be needed in an uninterruptible power supply), and that also provide a wide range of output frequencies (as needed in an advanced motor drive system with wide speed ranges), a three-level, dual-phase inverter topology is presented in this paper. Its three-level attribute was based on the F-type inverter topological concept,...

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  • Waste Tyres Pyrolysis for Obtaining Limonene

    Publication

    - Materials - Year 2020

    This review deals with the technologies of limonene production from waste tyre pyrolysis. Thermal decomposition is attractive for tackling the waste tyre disposal problem, as it enables both: energy to be recovered and limonene to be obtained. This material management recycling of tyres is environmentally more beneficial than the burning of all valuable products, including limonene. Given this recoverability of materials from waste...

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  • Application of Stirling Engine Type Alpha Powered by the Recovery Energy on Vessels

    Publication

    The Stirling engine is a device, in which thermal energy is transformed into mechanical without a contact between the heat carrier, and the working gas closed in the engine. Mentioned feature makes this type of engine very attractive for the use of the recovery energy, taken from other heat devices. One of the potential applications of Stirling engines is the use of thermal energy generated in the ship's engine room for producing...

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  • Reactive deposition of TiNx layers in a DC-magnetron discharge

    Publication

    - SURFACE AND INTERFACE ANALYSIS - Year 2008

    TiNx layers have been deposited in 'balanced mode' and 'unbalanced mode' of a reactive DC-magnetron plasma (carrier gas argon, reactive gas nitrogen) under different conditions. Discharge power and reactive gas flow have been varied. The layers have been examined by X-ray photoelectron spectroscopy (XPS), X-ray reflectometry (XR), and spectroscopic ellipsometry (SE). The results of the layer analyses were combined with plasma investigations...

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  • The development of an underwater telephone for digital communication purposes

    Publication

    - HYDROACOUSTICS - Year 2016

    The underwater telephone HTL-10 has been designed to provide voice and data communication between helicopter and submarines using acoustic waves. It works in a half-duplex mode and uses analogue power-efficient modulation in the form of a single side-band, suppressed carrier, in a wide range of frequencies. It generates the transmitted signal, and processes the received signals. It is implemented with the use of digital signal...

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  • Underwater Acoustic Imaging of the Sea

    Publication

    Acoustic waves are a carrier of information mainly in environments where the use of other types of waves, for example electromagnetic waves, is limited. The term acoustical imaging is widely used in the ultrasonic engineering to imaging areas in which the acoustic waves propagate. In particular, ultrasound is widely used in the visualization of human organs - ultrasonography (Nowicki, 2010). Expanding the concept, acoustical imaging...

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