Temat: optical sensing - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Theoretical investigation of slab waveguide sensor using anisotropic metamaterial
Autorzy:: Taya, S. A.
Powiązania:: https://bibliotekanauki.pl/articles/174457.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: anisotropic waveguides
optical sensing
double negative materials
Opis:: A three-layer slab waveguide with air as a substrate, lossless dielectric as a guiding film, and anisotropic double negative material as a cladding is explored as an optical sensor for refractometry applications. The double negative material is assumed to have a negative electric permittivity and magnetic permeability only along the wave propagation direction. The sensitivity of a guided mode to the variation in the refractive index of air substrate is derived and studied for the first few guided modes. It is found that the sensitivity can be enhanced with decreasing the guided light frequency as well as the film thickness. The sensitivity can reach 100% for some waveguide configurations.
Źródło:: Optica Applicata; 2015, 45, 3; 405-417
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Ustrojjstvo dlja monitoringa parametrov selskokhozjajjstvennogo polja
Scientific bases of monitoring of variability of parameters of agricultural paul
Autorzy:: Brovaretcs, A.
Powiązania:: https://bibliotekanauki.pl/articles/77487.pdf
Data publikacji:: 2013
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: agricultural land
monitoring
agricultural production
technological operation
optical remote sensing
Opis:: Мониторинг состояния сельскохозяйственных угодий – важное направление повышения эффективности сельскохозяйственного производства путем обеспечения качества выполнения технологических операций. Традиционные лабораторные методы исследования стоимостные, занимают много времени, и результаты измерения не сразу можно получить. Потому, быстрый сенсорный контроль необходим для оценивания состояния сельскохозяйственных угодий.
Monitoring of state of agricultural lands is important direction of rise of efficiency of agricultural production by providing of quality of implementation of technological operations. The traditional laboratory methods of research costs, the heap of time is taken, and the results of measuring not at once can be got. Therefore, the rapid sensory control is needed for the evaluation of the state of agricultural lands.
Źródło:: Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 3
1730-8658
Pojawia się w:: Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Satellite Image Fusion Using a Hybrid Traditional and Deep Learning Method
Autorzy:: Hammad, Mahmoud M.
Mahmoud, Tarek A.
Amein, Ahmed Saleh
Ghoniemy, Tarek S.
Powiązania:: https://bibliotekanauki.pl/articles/27314300.pdf
Data publikacji:: 2023
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: deep learning image fusion
remote sensing image fusion
remote sensing optical image
pan-sharpening
remote sensing image
Opis:: Due to growing demand for ground-truth in deep learning-based remote sensing satellite image fusion, numerous approaches have been presented. Of these approaches, Wald’s protocol is the most commonly used. In this paper, a new workflow is proposed consisting of two main parts. The first part targets obtaining the ground-truth images using the results of a pre-designed and well-tested hybrid traditional fusion method. This method combines the Gram–Schmidt and curvelet transform techniques to generate accurate and reliable fusion results. The second part focuses on the training of a proposed deep learning model using rich and informative data provided by the first stage to improve the fusion performance. The demonstrated deep learning model relies on a series of residual dense blocks to enhance network depth and facilitate the effective feature learning process. These blocks are designed to capture both low-level and high-level information, enabling the model to extract intricate details and meaningful features from the input data. The performance evaluation of the proposed model is carried out using seven metrics such as peak-signal-to-noise-ratio and quality without reference. The experimental results demonstrate that the proposed approach outperforms state-of-the-art methods in terms of image quality. It also exhibits the robustness and powerful nature of the proposed approach which has the potential to be applied to many remote sensing applications in agriculture, environmental monitoring, and change detection.
Źródło:: Geomatics and Environmental Engineering; 2023, 17, 5; 145--162
1898-1135
Pojawia się w:: Geomatics and Environmental Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Ammonia level sensor using tapered optical fiber coated with titanium dioxide-incorporated porphyrin
Autorzy:: Parasuti, Frazna
Hikmawati, Dyah
Trilaksana, Herri
Yasin, Moh.
Powiązania:: https://bibliotekanauki.pl/articles/27310105.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: ammonia sensing
tapered optical fibre
titanium dioxide
porphyrin
Opis:: Since ammonia is water-soluble, environmental studies have shown that the industrial waste such as fertilizer manufacturing, food products, palm oil, urea fertilizer industry can cause very serious damage to water body ecosystems if not properly managed, resulting in a decrease in water quality. Devices based on optical technology, especially devices that combine optical fibers and nanomaterials, are identified as highly sensitive to the species of interest by detecting changes in physicochemical properties. A practical, easy-to-use, inexpensive instrument for detecting ammonia level was proposed using tapered optical fiber (TOF) coated with titanium dioxide-incorporated porphyrin. TOF was fabricated by simultaneously stretching and heating. The preparation of TiO2/porphyrin/gelatine was prepared to coat tapered optical fiber by dipping. SEM analysis shows an increase in length and a decrease in diameter, also the successful coating of titanium dioxide and porphyrin in the taper region. The EDX analysis also proves the presence of the Ti element in the TOF layer. The TOF produces significant sensing performances toward the ammonia liquid concentration level. The TOF coated with titanium dioxide-incorporated porphyrin can detect a one ppm difference in ammonia concentration with a certain range of output voltage for every concentration has.
Źródło:: Optica Applicata; 2023, 53, 3; 353--361
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A Study of Types of Sensors used in Remote Sensing
Autorzy:: Vincent, Shweta
Francis, Sharmila Anand John
Raimond, Kumudha
Kumar, Om Prakash
Powiązania:: https://bibliotekanauki.pl/articles/227262.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: disaster management
microwave sensors
optical sensors
Remote Sensing
Opis:: Of late, the science of Remote Sensing has been gaining a lot of interest and attention due to its wide variety of applications. Remotely sensed data can be used in various fields such as medicine, agriculture, engineering, weather forecasting, military tactics, disaster management etc. only to name a few. This article presents a study of the two categories of sensors namely optical and microwave which are used for remotely sensing the occurrence of disasters such as earthquakes, floods, landslides, avalanches, tropical cyclones and suspicious movements. The remotely sensed data acquired either through satellites or through ground based-synthetic aperture radar systems could be used to avert or mitigate a disaster or to perform a post-disaster analysis.
Źródło:: International Journal of Electronics and Telecommunications; 2019, 65, 2; 217-228
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Spectral effects in bio-optical control on the ocean system
Autorzy:: Sathyendranath, S.
Platt, T.
Powiązania:: https://bibliotekanauki.pl/articles/47462.pdf
Data publikacji:: 2007
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: primary production
ocean colour
bio-optical property
remote sensing
ocean ecosystem
phytoplankton
Opis:: The influence of phytoplankton on the spectral structure of the submarine irradiance field is reviewed. The implications for the ocean system of the spectral response by phytoplankton to the ambient light field are discussed. For example, it provides the basis for retrieval of phytoplankton biomass by visible spectral radiometry (ocean-colour remote sensing). In the computation of primary production, the results of spectral models differ in a known and systematic manner from those of non-spectral ones. The bias can be corrected without risk of incurring additional random errors. The models in use for phytoplankton growth, whether based on available light or absorbed light, whether expressed in terms of chlorophyll or carbon, are shown all to conform to the same basic formalism with the same parameters. Residual uncertainty lies less with the models than with the parameters required for their implementation. The submarine light field and the spectral characteristics of phytoplankton carry latent information on phytoplankton community structure. Differences in spectral response by different functional types of phytoplankton are small but significant. Optical considerations limit the maximum phytoplankton biomass that can be sustained in a given surface mixed layer. Moreover, the upper bound on the biomass depends on the spectral response of the dominant phytoplankton taxa. As a result, an optical control exists in the mixed layer that tends to resist extreme excursions of the biomass and also to maintain biodiversity in the phytoplankton.
Źródło:: Oceanologia; 2007, 49, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Validation of SeaWiFS and MODIS Aqua-Terra aerosol products in coastal regions of European marginal seas
Autorzy:: Melin, F.
Zibordi, G.
Carlund, T.
Holben, B.N.
Stefan, S.
Powiązania:: https://bibliotekanauki.pl/articles/49171.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: validation
aerosol
ocean colour
European marginal sea
aerosol optical thickness
coastal area
remote sensing
optical property
aerosol robotic network
Źródło:: Oceanologia; 2013, 55, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Wielokanałowy, optoelektroniczny system do pomiaru stężenia gazów
The multichannel, optoelectronic gas sensor system based on interferometric nanostructures with gasochromic thin films
Autorzy:: Maciak, E.
Opilski, Z.
Pustelny, T.
Urbańczyk, M.
Powiązania:: https://bibliotekanauki.pl/articles/154779.pdf
Data publikacji:: 2010
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: optyczny czujnik gazu
optoelektroniczny system pomiarowy
nanostruktura sensorowa
optical gas sensor
optoelectronic gas sensor system
sensing nanostructure
optical interferometric structure
Opis:: W pracy przedstawiono nowatorski wielokanałowy, optoelektroniczny system pomiarowy i sposób pomiaru stężenia gazów przemysłowych i toksycznych. Mierzony analit gazowy może być różny w zależności od zastosowanej interferencyjnej nanostruktury sensorowej. Pomiar odbywa się w gazowym środowisku pomiarowym. Niniejsze rozwiązanie optoelektronicznego, gazowego systemu pomiarowego wykorzystuje interferencyjne, optyczne nanostruktury sensorowe zawierające w swej konstrukcji cienkie warstwy receptorowe z optycznie czynnych materiałów. Zatem, optyczna głowica sensorowa zmienia swoje parametry optyczne w wyniku oddziaływania z badanym analitem gazowym.
In the paper the multichannel, optoelectronic gas sensor system based on interferometric, gasochromic nanostructures is presented. The silicon colour sensor TCS230 detects the intensity and change of colour coordinates RGB of an optical signal resulting from exposure of the sensing structure to a specific type of gas. Using multichannel measurement, one can simultaneously detect different gas or analyte molecules in the sample by immobilizing different optical receptor thin films (nanostructures) at different channels. Each optical sensing channel consists of three parts: the input port which includes a broadband light source: "warm" white LED, multi-layered sensing nanostructure: interferometric and gasochromic, the output port including a silicon colour sensor TCS230 detecting the intensity and change of colour coordinates RGB of an optical signal resulting from the sensing structure exposure to a specific type of gas. At the sensing window, on the glass substrate there are immobilized nanostructures being chemo-optical, gasochromic and interferometric transducer receptors, which can selectively interact with a specific type of gas molecules present in the gas mixture. When a physical-chemical binding process takes place on the sensing window of the measuring channel, an interferometric colour of the sensing element (nanostructure) changes and colour coordinates of the measured optical signal change as well. The change of the colour coordinates is proportional to the change of the effective refractive index of the receptor structure (particularly refractive index of the resonance cavity). By measuring the intensity change of the optical signal RGB, the refractive index change ?n taking place in the measuring window can be calculated and the concentration of a specific gas in the gas mixture can be measured.
Źródło:: Pomiary Automatyka Kontrola; 2010, R. 56, nr 7, 7; 799-802
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Patterns of relationship between PM₁₀ from air monitoring quality station and AOT data from MODIS sensor onboard of Terra satellite
Autorzy:: Suriya, Winai
Chunpang, Poramate
Laosuwan, Teerawong
Powiązania:: https://bibliotekanauki.pl/articles/35535233.pdf
Data publikacji:: 2021
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: remote sensing
MODIS sensor
PM10
aerosol optical thickness
AOT
air quality index
AQI
Opis:: Thailand, especially in the northern region, often encounters the problem of having PM10 exceeding the normal standard level, which could do harm to people’s health. Mostly, such problem is caused by the burning of forest area and open area; this is clearly seen during January–April of every year. Also, the problem as mentioned is caused by the meteorological conditions and the terrains in the northern region that make it easy for PM10 to be accumulated. The aim of this study was to analyze the patterns of relationship between PM10 measured from the ground monitoring station and AOT data received from MODIS sensor onboard of Terra satellite in Phrae Province located in the northern region of Thailand. The method performed was by analyzing the correlation between PM10 data obtained from the ground monitoring station and the AOT data received from the MODIS sensor onboard of Terra satellite during January–April 2018. It was found from the study that the change of the intensity of PM10 and AOT in the climate was highly related; it appeared that the correlation coefficient (r) in January–April was 0.92, 0.91, 0.91 and 0.92, respectively. This research pointed out that during February– –April, the areas of Phrae Province had the level of PM10 that affected health. Besides, from the method in this research, it revealed AOT data received from MODIS sensor onboard of Terra satellite could be applied in order to follow up, monitor, and notify the spatial changes of PM10 efficiently.
Źródło:: Scientific Review Engineering and Environmental Sciences; 2021, 30, 2; 236-249
1732-9353
Pojawia się w:: Scientific Review Engineering and Environmental Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Distributed temperature sensing in optical fibers based on Raman scattering: demodulation algorithms
Autorzy:: Shatarah, I. S. M.
Olbrycht, R.
Powiązania:: https://bibliotekanauki.pl/articles/114052.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: Distributed Temperature Sensing (DTS)
Optical Time Domain Reflectometry (OTDR)
spontaneous Raman back-scattering
demodulation algorithms
Opis:: Distributed temperature sensing systems (DTS) has improved over years thanks to the improvements in configurations, components and demodulation calculating algorithms. The demodulation algorithms have been improved depending on the application and the environment, in which the fiber is installed, in order to obtain accurate measurements of temperature and distance. This study discusses the conventional calculating methods and proposed algorithms for different configurations for DTS systems.
Źródło:: Measurement Automation Monitoring; 2017, 63, 2; 45-47
2450-2855
Pojawia się w:: Measurement Automation Monitoring
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: A simple model of light transmission through the atmosphere over the Baltic Sea utilising satellite data
Autorzy:: Krezel, A.
Kozlowski, L.
Paszkuta, M.
Powiązania:: https://bibliotekanauki.pl/articles/48356.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: sea surface
Baltic Sea
solar energy
atmosphere
light transmission
satellite remote sensing
aerosol optical thickness
Opis:: A simple spectral model of solar energy input to the sea surface was extended to incorporate space-borne data. The extension involved finding a method of determining aerosol optical thickness (on the basis of AVHRR data) and the influence of cloudiness (on the basis of METEOSAT data) on the solar energy flux. The algorithm for satellite data assimilation involves the analysis of satellite images from the point of view of cloud identification and their classification with respect to light transmission. Solar energy input values measured at the Earth’s surface by traditional methods were used to calibrate and validate the model. Preliminary evaluation of the results indicates a substantial improvement in the accuracy of estimates of solar energy input to the sea surface in relation to models utilising only traditionally obtained data on the state of the atmosphere.
Źródło:: Oceanologia; 2008, 50, 2; 125-146
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Testing the performance of empirical remote sensing algorithms in the Baltic Sea waters with modelled and in situ reflectance data
Autorzy:: Ligi, M.
Kutser, T.
Kallio, K.
Attila, J.
Koponen, S.
Paavel, B.
Soomets, T.
Reinart, A.
Powiązania:: https://bibliotekanauki.pl/articles/48045.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: remote sensing
algorithm
Baltic Sea
coastal water
chlorophyll a
optical property
phytoplankton assemblage
water reflectance
Opis:: Remote sensing studies published up to now show that the performance of empirical (band-ratio type) algorithms in different parts of the Baltic Sea is highly variable. Best performing algorithms are different in the different regions of the Baltic Sea. Moreover, there is indication that the algorithms have to be seasonal as the optical properties of phytoplankton assemblages dominating in spring and summer are different. We modelled 15,600 reflectance spectra using HydroLight radiative transfer model to test 58 previously published empirical algorithms. 7200 of the spectra were modelled using specific inherent optical properties (SIOPs) of the open parts of the Baltic Sea in summer and 8400 with SIOPs of spring season. Concentration range of chlorophyll-a, coloured dissolved organic matter (CDOM) and suspended matter used in the model simulations were based on the actually measured values available in literature. For each optically active constituent we added one concentration below actually measured minimum and one concentration above the actually measured maximum value in order to test the performance of the algorithms in wider range. 77 in situ reflectance spectra from rocky (Sweden) and sandy (Estonia, Latvia) coastal areas were used to evaluate the performance of the algorithms also in coastal waters. Seasonal differences in the algorithm performance were confirmed but we found also algorithms that can be used in both spring and summer conditions. The algorithms that use bands available on OLCI, launched in February 2016, are highlighted as this sensor will be available for Baltic Sea monitoring for coming decades.
Źródło:: Oceanologia; 2017, 59, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Distributed temperature sensing in optical fibers based on Raman scattering: theory and applications
Autorzy:: Shatarah, I. S. M.
Olbrycht, R.
Powiązania:: https://bibliotekanauki.pl/articles/114537.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: Distributed Temperature Sensing (DTS)
Optical Time Domain Reflectometry (OTDR)
spontaneous Raman scattering
distributed fiber sensor
Opis:: Distributed temperature sensing (DTS) based on Raman scattering in optical fibers gains more importance in several applications, due to its accuracy, immunity to electromagnetic interference and corrosion, durability, low cost and availability. DTS systems are configured differently depending on the environment of application, and uses Optical Time Domain Reflectometry (OTDR) or Optical Frequency Domain Reflectometry (OFDR) for data analyzes. This study features a theoretical background and an introduction to DTS systems’ configurations and applications.
Źródło:: Measurement Automation Monitoring; 2017, 63, 2; 41-44
2450-2855
Pojawia się w:: Measurement Automation Monitoring
Dostawca treści:: Biblioteka Nauki