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Tytuł:
Influence of surface plasmon wave interference on near-field imaging on metal nanostructures with apertured probe
Autorzy:
Yang, Y.
Sun, Z.
Powiązania:
https://bibliotekanauki.pl/articles/173847.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
near-field
surface plasmon
metal
nanostructure
Opis:
We numerically studied artifact issues on near-field imaging of field intensity on metal nanostruc-tures (isolated ridges and slits in a continuous film) with an apertured probe. It is shown for the latter case that the interaction between neighboring slits via propagating surface plasmon waves (e.g., surface plasmon wave interferences) makes the probe-imaged field intensity highly condi-tional in reflection of the unperturbed field. As surface plasmon behaviors and probe imaging processes are polarization-sensitive and the field components are correlated, a model analysis of the partial field components elucidates their relations, which can help to derive the unperturbed near-field image from the probed one.
Źródło:
Optica Applicata; 2013, 43, 3; 615-626
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absorption of EM energy by human body in the vicinity of the GSM base station antenna
Autorzy:
Wójcik, D.
Topa, T.
Szczepański, K.
Powiązania:
https://bibliotekanauki.pl/articles/307771.pdf
Data publikacji:
2005
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
cellular telephony
GSM
human exposure to EM fields
antennas
near field
specific absorption rate
Opis:
A hybrid method is proposed for specific absorption rate analysis in a human body located in the near field of typical GSM base-station panel antenna. The method combines FDTD technique with analytical description of the near field of isolated antenna. The approximate results are found to be in excellent agreement with the results obtained by using the traditional FDTD. The most important advantage of proposed approach is minimization of computer memory requirements and computation time.
Źródło:
Journal of Telecommunications and Information Technology; 2005, 2; 34-38
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of Acoustic Tubes Array and Application to Measuring Acoustic Loads in Supersonic Airflow
Autorzy:
Wei, L.
Li, M.
Fu, Q.
Fan, Y.
Yang, D.
Powiązania:
https://bibliotekanauki.pl/articles/176750.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustic load
acoustic tubes array
near field measurement
supersonic airflow
Opis:
In the acoustic fatigue experiment for hypersonic vehicle in simulated harsh service environment on ground, acoustic loads on the surface of test pieces of the vehicle need to be measured. However, for the normal microphones without high temperature resistance ability, the near field sound measurement cannot be achieved. In this work, on the basis of previous researches, an acoustic tubes array is designed to achieve the near field measurement of acoustic loads on the surface of the test piece in the supersonic airflow with high temperature achieved by coherent jet oxygen lance. Firstly, the process of designing this acoustic tubes array is introduced. Secondly, the equality of phase differences at the front and at the end of the tubes is stated and proved using a phase differences test with an acoustic tubes array whose design is presented in this text; therefore, the phase differences of signals acquired by microphones can be directly applied to beamforming algorithm to determine the acoustic load source. Finally, using above mentioned acoustic tubes array, measurement of acoustic load, with and without a test piece in the supersonic airflow made by the coherent jet oxygen lance, is conducted respectively, and the measurements results are analyzed.
Źródło:
Archives of Acoustics; 2014, 39, 3; 395-402
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simple model of the scanning near-field optical microscopy probe tip for electric field enhancement
Autorzy:
Wang, Y.
Cai, W.
Yang, M.
Liu, Z.
Shang, G.
Powiązania:
https://bibliotekanauki.pl/articles/174091.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
near-field tip
electromagnetic field enhancement
finite-difference time-domain
FDTD
Opis:
In this paper, we present a simple near-field probe model that is composed of an elongated ellipsoid and a finite metal truncated cone. The elongated ellipsoid has been shown to act as a protrusion or separate particle near a truncated cone apex with strong near-field enhancement under laser excitation. By controllably varying the length of the ellipsoid protrusion from the truncated cone, the truncated cone-ellipsoid probes can be adapted to the suitability of near-field probes. The effects of substrate material and excitation wavelength on the near field enhancement for different tip apexes are also discussed. In addition, we compared the properties of the truncated cone-ellipsoid probe with the widely used hemisphere conical tip by launching surface plasmon polaritons on plasmonic waveguides to prove the suitability of the truncated cone-ellipsoid probes as high performance near-field probes. The present simple model would provide a theoretical basis for the actual construction of probes.
Źródło:
Optica Applicata; 2017, 47, 1; 119-130
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The identification method of the sources of radiated electromagnetic disturbances on the basis of measurements in the near-field zone
Autorzy:
Trzcinka, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2141812.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
electromagnetic compatibility
EMC
near electromagnetic field
radiated emission
near-field probe
source of disturbance
Opis:
The paper presents results of tests of a simple device, consisting in the location of a source of disturbance emission by means of measurements within the near field with manual positioning of the measuring probe. The effectiveness of the source of disturbance location was finally verified by a positive result of the radiated emission tests in the EMC laboratory using a standardised method.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2021, 15, 4; 53-64
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Far and near fields of Hermite–Gaussian beams passing through an annular aperture and its numerical simulation by the angular spectrum method
Autorzy:
Talatinian, Alexander
Powiązania:
https://bibliotekanauki.pl/articles/27310101.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
angular spectrum
propagation of higher modes
annular aperture
near field
far field
Opis:
This research focuses on the analysis of the free propagation of Hermite–Gaussian beams diffracted by a symmetrical annular aperture placed at the beam waist plane. The propagation is studied analytically and numerically using the angular spectrum method and the 2D fast Fourier transformation. Numerical simulation examples illustrate the propagation characteristics of the Hermite–Gaussian beams diffracted by an annular aperture. The beam truncation parameters and obscuration ratio influence Hermite–Gaussian beam diffraction properties.
Źródło:
Optica Applicata; 2023, 53, 3; 467--481
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EM emission of ICs implementated in FPGA : influence of floor plan and electric function
Autorzy:
Szczęsny, J.
Kołodziejski, J. F.
Powiązania:
https://bibliotekanauki.pl/articles/378429.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Elektronowej
Tematy:
FPGA
emisja elektromagnetyczna
prąd wysokiej częstotliwości
Xilinx
electromagnetic emission
high frequency current
near-field disturbances
Opis:
In the paper some investigations are presented aiming to check the influence of IC floor plan and the circuit function on its electromagnetic emissions. As the test vehicle Xilinx FPGA XCV800 type was used, in which two types of multiplicators were implemented. To compare the effects, high frequency currents in supply and ground pins of the circuits as well as near field disturbances were measured over the circuits.
Źródło:
Electron Technology : Internet Journal; 2007, 39, 4; 1-7
1897-2381
Pojawia się w:
Electron Technology : Internet Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protection System Against Products Counterfeit Based on NFC and Barcode Technologies
Autorzy:
SALEH, HADI M.
UMARU, MOHAMMED U.
ALEXANDROV, DMITRY V.
Powiązania:
https://bibliotekanauki.pl/articles/457118.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski
Tematy:
Anti-Counterfeit Products
NFC Tags
Barcodes
QR
Mobile Application
Authenti-cation
Near Field Communication (NFC)
Opis:
Abstract The objective of this report is to provide a protective system architecture and analysis for NFC and Barcode technology that can be use to empower consumer in the fight against counter-feiting and IPR infringing products using mobile devices. This report focuses on the technology that can empower the consumer in the field in the presence of the goods itself by using technical tools and devices, which are easily available. The report identifies the main immediate empower-ring tool for consumers. This is represented by a modern smartphone (or similar device like a tablet) to be use as a tool to empower the consumer in the fight against counterfeiting. The modern smartphone is equipped with a high resolution camera, support for different standards for wireless connectivity, a powerful processor able to support the implementation of sophisticated algorithms and support for NFC and Barcode readers. In addition, the smartphone can be integrated and aug-mented with a wide range of plug-in devices and tools (e.g., an USB microscope). The concept of empowering the consumer can be an important element to support Due Diligence practices and Supply Chain Integrity because the different categories of consumer can authenticate the goods in different parts of the supply chain and report the presence of non-compliances (e.g., counterfeit products).
Źródło:
Edukacja-Technika-Informatyka; 2017, 8, 4; 368-374
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of near-collisions in the Tagus River Estuary using a marine traffic simulation model
Autorzy:
Rong, H.
Teixeira, A.
Soares, C. G.
Powiązania:
https://bibliotekanauki.pl/articles/135293.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
near-collisions
ship domain
marine traffic simulation
artificial potential field
AIS data
maritime safety
Opis:
This paper evaluates near ship-ship collision situations in the Tagus River Estuary using a simulation model of ship navigation in restricted waters. The simulation model consists of a ship collision avoidance model based on the Artificial Potential Field (APF) method, which has been improved to account for the lateral distribution of traffic along the route, the ship type and length and speed development of the ships along the trajectory. AIS data of ships entering and leaving the port of Lisbon are analysed to obtain the main characteristics of traffic parameters used as input for the traffic simulation model, such as: the routes of the vessels, speed distribution along the routes, traffic density and characteristics of the ships in each route, among others. First, the improved model of ship navigation and the Monte Carlo simulation technique are used to simulate the marine traffic in the Tagus River Estuary. Then, the concept of “ship domain” is used as collision criterion to determine the number of near collisions and the locations where they are most likely to occur. Finally, the simulation results are compared to the ones obtained from raw AIS data to assess the capability of the simulation model for marine traffic risk analysis.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 43 (115); 68-78
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of radionuclide release through EBS of conceptual repository for Lithuanian RBMK spent nuclear fuel disposal : case of canister with initial defect
Autorzy:
Poskas, P.
Narkuniene, A.
Grigaliuniene, D.
Kilda, R.
Powiązania:
https://bibliotekanauki.pl/articles/147504.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
geological repository
near field
radionuclide release
radiotoxicity
RBMK reactor
spent nuclear fuel
Opis:
This paper presents research on radionuclide transport from generic geological repository for the RBMK-1500 SNF of 2.8 235U initial enrichment (with Er absorber) and average burn-up of ~ 29 MWd/kgU. Radionuclide transport analysis was focused on the engineered barrier system (EBS) and performed taking into account possible differences in the data on the initial size of a canister defect, defect enlargement time and radionuclide release start time. For the numerical simulations, computer code AMBER (UK) was used. The analysis of radionuclide transport regularities demonstrates that the release from the EBS is the most intensive after the defect enlargement. Most relevant radionuclides were identified based on the mass transfer analysis complemented by the analysis of radiotoxicity flux. The results showed that, depending on the differences of the initial defect size, defect enlargement time and release start time, the peak flux from the EBS may vary by a factor of 2 (for 129I) and 1.5 (for 226Ra) for RBMK-1500 SNF.
Źródło:
Nukleonika; 2013, 58, 4; 487-495
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correction of Evanescent Wave Influence on the Flexural Wave Velocity and Wavelength Estimation Based on a Mode Shape Function
Autorzy:
Pantelić, Filip
Šumarac Pavlović, Dragana
Mijić, Miomir
Ridley-Ellis, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/31339954.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
mode shape function
flexural wave velocity
very near field
Opis:
The aim of this research is to use a simple acoustic method of a very near field recording, which enables measurement and display of oscillation modes, to estimate the velocity of flexural waves, based on the wavelengths of standing waves measured on the sample. The paper analyses cases of 1D geometry, flexural waves that occur on a beam excited by an impulse. Measurements were conducted on two different samples: steel and a wooden beam of the same length. Due to the appearance of evanescent waves at the boundary regions, the distance between the nodes of standing waves that occur deviates from half the wavelength, which can be compensated using a correction factor. Cases of fixed and free boundary conditions were analysed. By quantifying how much the boundary conditions change the mode shape function, it can be predicted how the mode of oscillation changes if the boundary conditions change, which can also find application in musical acoustics and sound radiation analysis.
Źródło:
Archives of Acoustics; 2022, 47, 4; 539-546
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review of mobile banking solutions including the analysis of survey performed among the individual users
Przegląd rozwiązań bankowości mobilnej na tle badań ankietowych przeprowadzonych wśród użytkowników indywidualnych
Autorzy:
Panas, Jolanta
Wilczyńska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/408688.pdf
Data publikacji:
2019
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
online banking
mobile application
near field communication
bankowość online
aplikacja mobilna
komunikacja bliskiego zasięgu
Opis:
The article presents the structure of the electronic banking with attention being given to solutions applied in mobile banking and mobile payments available in Poland. For the purpose of this article a survey was conducted among the active users of the Internet, aiming to research changes with regards to susceptibility of individual users to take advantage of application of mobile banking including mobile payments and their main concerns regarding the using of mobile banking services.
Artykuł przedstawia strukturę bankowości elektronicznej z uwzględnieniem rozwiązań stosowanych w bankowości mobilnej oraz płatnościach mobilnych dostępnych w Polsce. Na potrzeby niniejszego artykułu przeprowadzono ankietę pośród użytkowników sieci Internet mającą na celu zbadanie zmian zachodzących w zakresie skłonności indywidualnych użytkowników do korzystania z usług bankowości mobilnej, w tym z płatności mobilnych oraz ich głównych obaw związanych z korzystaniem z usług bankowości mobilnej.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2019, 9, 1; 12-22
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plasmonic nano-imaging with metallic nanolens
Autorzy:
Ono, A.
Verma, P.
Kawata, S.
Powiązania:
https://bibliotekanauki.pl/articles/385208.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
plasmonics
near-field optics
Opis:
We proposed a nano-imaging system at optical frequency region with the array of metallic nanorods. We simulated the field distribution of imaging process using the finitedifference time-domain algorithm. It is found that the spatial resolution is 40 nm, which is much beyond the diffraction-limit and is limited by the array pitch. The typical configuration is a hexagonal arrangement with 40 nm periodicity of silver rods of 50 nm height and 20 nm diameter. The image formation highly depends on the coherence and the polarization of the dipole sources, the array pitch, and the source-array distance. The principle of our near-field imaging is based on the longitudinal resonance of the localized surface plasmon along a metallic nanorod. The spectral responses of the device are also investigated.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 102-104
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Channel Characterisation and Link Budget of MIMO Configuration in Near Field Magnetic Communication
Autorzy:
Nguyen, H.
Agbinya, J. I.
Devlin, J.
Powiązania:
https://bibliotekanauki.pl/articles/226972.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
near field magnetic induction communication
NFMIC
MIMO inductive communication
Opis:
Traditional radio communication has gained significantly from using multiple input and multiple output (MIMO) architecture in the system. Many wireless applications, such as wireless LAN and cellular network, have adopted this technology to improve their system performance. However, the effect of MIMO systems has not been investigated in the case of inductive near field short range communications. The purpose of this paper is to explore a new method for increasing the magnetic communication range using MIMO. Three system models includingMISO, SIMO and MIMO are proposed to characterize the number of transmitters and receivers to the link. These models have helped to extend not only the range but also the communication channel in NFMIC.
Źródło:
International Journal of Electronics and Telecommunications; 2013, 59, 3; 255-262
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena zagrożenia tąpaniami w kopalniach podziemnych uwzględniająca parametry drgań blisko ognisk wstrząsów - doświadczenia z polskich kopalń
Rockburst hazard prognosis for underground mines taking into consideration tremor parameters close to the tremor sources - experiences from Polish mines
Autorzy:
Mutke, G.
Powiązania:
https://bibliotekanauki.pl/articles/349188.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
wstrząsy górnicze
tąpnięcia
bliskie pole falowe
maksymalna amplituda prędkości drgań cząsteczek górotworu
maksymalna amplituda przyspieszenia drgań cząsteczek górotoworu
parametry źródła sejsmicznego
obciążenie dynamiczne
geofizyczne empiryczne kryterium potencjalnego zagrożenia tąpnięciem
mining tremors
rockburst
near-field wave
peak particle acceleration
seismic source parameters
dynamic loads
geophysical empirical criterion for potential rockburst hazard
Opis:
Ocena zagrożenia tąpaniami oraz ocena stateczności wyrobisk podziemnych w kopalniach węgla wymaga znajomości nie tylko obciążeń statycznych, ale również obciążeń dynamicznych. Analiza skutków wstrząsów w kopalniach Górnośląskiego Zagłębia Węglowego w postaci różnego typu i intensywności uszkodzeń wykazała, że występowały one wówczas, gdy ogniska tych wstrząsów były zlokalizowane blisko (przeważnie do 100 m) od wyrobisk. Potwierdza to fakt, że parametry drgań w tych odległościach mają decydujące znaczenie dla zaistnienia tąpnięcia, bowiem duże wartości parametru PPV są równoznaczne z występowaniem odpowiednio dużych obciążeń dynamicznych. W artykule pokazano geofizyczne empiryczne kryterium potencjalnego zagrożenia tąpnięciem. Analizując udokumentowaną bazę 120 tąpnięć, jakie zaistniały w GZW w latach 1988-2006, dokonano weryfikacji przedstawionego kryterium, stwierdzając, że 90% wszystkich tąpnięć wystąpiło w strefie, w której prędkość drgań PPV osiągała wartości od 0,05 m/s do 1 m/s. Wyniki badań przedstawione w artykule mogą być wykorzystywane do czasoprzestrzennego projektowania eksploatacji górniczej w warunkach prognozowanej dużej sejsmiczności górotworu, jak również do racjonalnego doboru obudowy i działań profilaktycznych zabezpieczających funkcjonalność wyrobisk i przyczyniających się do poprawy poziomu bezpieczeństwa pracy.
To study the rockburst hazard and underground mine working stability it is essential to know not only the static loads but also the dynamic loads. The performed analysis of the effects of mine tremors from the Upper Silesian Coal Basin, and of their intensity and various types of damage, clearly shows that they only occurred when the tremor sources were located close to the openings (mostly up to 100 m). These observations show that the ground motions parameters at such distances may be crucial for the occurrence of a rockburst because the high values of the PPV parameter are proportional to high dynamic stresses and underground hazards. An empirical criterion for potential rockburst hazard has been developed based on the worked out correlation dependences. In analyzing the documented database of 120 rockbursts from the Upper Silesian Coal Basin that occurred during a period from 1988 to 2006, the above mentioned criterion was verified. It has been found, that 90% of the rockbursts occurred in the area where peak particle velocity (PPV) reached values ranging from 0,05 m/s to 1 m/s. The investigation results presented in this this paper may be used in both the spatial and time table planning of mining operations under predicted high seismicity conditions and the rational choice of support and preventive actions ensuring functionality of mine workings and improvement in work safety level.
Źródło:
Górnictwo i Geoinżynieria; 2007, 31, 3/1; 439-450
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
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