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Wyświetlanie 1-25 z 186
Tytuł:
Technologies for low cost small satellites
Autorzy:
Kurek, K.
Powiązania:
https://bibliotekanauki.pl/articles/307636.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
small satellites
satellite systems
space technology
Opis:
Paper presents short description of satellite struc- ture and characterization of its subsystems. Review of tech- nologies used in small satellite missions is presented, consid- ering possible solutions in low cost projects. Three common solutions: the use of commercial off the shelf (COTS) compo- nents, miniaturization, remote testing and integration of sub- systems can be used to significantly reduce cost of the satellite.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 1; 45-49
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low cost alternative fuel from biomass
Autorzy:
Zeru, D.
Gebregergis, H.
Tilahun, M.
Sahu, O.
Powiązania:
https://bibliotekanauki.pl/articles/11526.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
A major challenge for next decades is development of competitive renewable energy sources, highly needed to compensate fossil fuels reserves and reduce greenhouse gas emissions. Among different possibilities, which are currently under investigation, there is the exploitation of unicellular algae for production of biofuels and biodiesel in particular. Microalgae have the ability of accumulating large amount of lipids within their cells which can be exploited as feedstock for the production of biodiesel. The lipid content of different species of microalgae can range from 30%-70% of their dry weight. In this project a microalgae with lipid content of 60.095% was used. This means that 26gms of oil was obtained from 42gms of microalgae sample from which 17.624gm of biodiesel (FAME) was found at the end of trans-esterification. Algae biofuels avoid some of the previous drawbacks associated with crop-based biofuels as the algae do not compete with food crops. The favorable growing conditions found in many developing countries has led to a great deal of speculation about their potentials for reducing oil imports, stimulating rural economies, and even tackling hunger and poverty. Strong research efforts are however still needed to fulfill this potential and optimize cultivation systems and biomass harvesting.
Źródło:
International Letters of Natural Sciences; 2015, 05
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of Low-Cost Photodynamic Therapy Device
Autorzy:
Momchilov, N.
Bliznakova, I.
Borisova, E.
Troyanova, P.
Avramov, L.
Powiązania:
https://bibliotekanauki.pl/articles/2047897.pdf
Data publikacji:
2007-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.72.Bj
87.64.kv
87.19.xj
Opis:
Photodiagnosis and photodynamic therapy of non-melanoma skin cancers using delta-aminolevulinic acid/protoporphyrin IX (5-ALA/PpIX) give a combined application with broadest dissemination in the current clinical practice. The problems with using of lasers as light sources are the expenses associated with the operation of these types of installations. This is why we test the capability of cheaper sources - light-emitting diodes at 405 nm for fluorescence excitation of PpIX and 635 nm for photodynamic action initiation. A LED matrix is developed in our laboratory using two types of LEDs and a combined photodiagnosis/photodynamic theory device applicable for clinical practice is built. Geometrically matrix is formed in such way that power density at 635 nm is about 40 mW/cm$\text{}^{2}$, which allow to reach treatment doses for a 15-20 min irradiation depending of the lesion size in the focus of the system. The therapeutic mode of system developed can be used also with some other photosensitizers from the porphyrins derivatives family.
Źródło:
Acta Physica Polonica A; 2007, 112, 5; 1125-1130
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low cost integrated navigation system for unmanned vessel
Autorzy:
Yang, C.
Wang, Q.
Powiązania:
https://bibliotekanauki.pl/articles/259693.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
low cost
MEMS
inertial navigation
integrated navigation
Opis:
Large errors of low-cost MEMS inertial measurement unit (MIMU) lead to huge navigation errors, even wrong navigation information. An integrated navigation system for unmanned vessel is proposed. It consists of a low-cost MIMU and Doppler velocity sonar (DVS). This paper presents an integrated navigation method, to improve the performance of navigation system. The integrated navigation system is tested using simulation and semi-physical simulation experiments, whose results show that attitude, velocity and position accuracy has improved awfully, giving exactly accurate navigation results. By means of the combination of low-cost MIMU and DVS, the proposed system is able to overcome fast drift problems of the low cost IMU.
Źródło:
Polish Maritime Research; 2017, S 3; 110-115
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Low-cost Multicomputer for solving the RCPSP
Autorzy:
Pawiński, G.
Sapiecha, K.
Powiązania:
https://bibliotekanauki.pl/articles/106309.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
multicomputer
RCPSP
Opis:
In the paper it is shown that time necessary to solve the NP-hard Resource-Constrained Project Scheduling Problem (RCPSP) could be considerably reduced using a low-cost multicomputer. We consider an extension of the problem when resources are only partially available and a deadline is given but the cost of the project should be minimized. In such a case nding an acceptable solution (optimal or even semi-optimal) is computationally very hard. To reduce this complexity a distributed processing model of a metaheuristic algorithm, previously adapted by us for working with human resources and the CCPM method, was developed. Then, a new implementation of the model on a low-cost multicomputer built from PCs connected through a local network was designed and compared with regular implementation of the model on a cluster. Furthermore, to examine communication costs, an implementation of the model on a single multi-core PC was tested, too. The comparative studies proved that the implementation is as ecient as on more expensive cluster. Moreover, it has balanced load and scales well.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2016, 16, 1; 50-61
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fly me: financial mathematics and low-cost airlines
Autorzy:
Piwarska, Karina
Kulesza, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/748386.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
91B28
Opis:
Rynki instrumentów pochodnych należą obecnie do jednych z najciekawszych obszarów badań w matematyce finansowej. Są też obszarem, gdzie spotykają się teoria i praktyka, tak ważne w rzetelnie uprawianej matematyce stosowanej. Zachodzi tam ożywiona wymiana idei pomiędzy matematykami a ekonomistami, choć de facto ma ona charakter bardziej interdyscyplinarny, angażując np. informatyków i fizyków. Równolegle dynamiczny rozwój rynków i pojawianie się coraz szerszej gamy instrumentów pochodnych pozwalają na włączanie do tego zbioru coraz to nowych obiektów. W naszej pracy pokazujemy, że skoro zakładać się można „o wszystko”, a instrumenty pochodne są rodzajem giełdowego zakładu, to bilety tanich linii lotniczych można opisać jako specyficzne opcje. Uwzględniając rzeczywiste warunki rynkowe i ograniczenia narzucone w regulaminach tanich przewoźników, przedstawimy alternatywny dla już istniejących sposób podejścia do wyceny takich instrumentów oraz metody konstrukcji i optymalizacji portfela złożonego z biletów, który może mieć zastosowanie zarówno do celów spekulacyjnych, jak i korporacyjnych.
The derivatives are financial instruments whose value changes in response to the changes in underlying variables. Originally, they were based on commodities and used to reduce risk from varying prices. This strategy is often called hedging. However as financial markets have become more complex it is more and more difficult to distinguish between old fashioned hedging and speculation. At present the derivatives’ markets are one of the most interestingfie lds of research in financial mathematics. They are the point where theory and practice meet, an important factor in good applied mathematics. As a result a vivid exchange of ideas takes place between mathematicians and researchers from huge variety of fields like economics, physics and computer science. In the same time the markets are constantly evolvinga nd new financial instruments are created every day. Nowadays, derivatives are beingc onstructed not only for assets such as commodities, equities , bonds, interest rates, exchange rates, but also various indexes or even weather. In order to make a transaction a buyer and a seller are needed. In this respect a financial instrument can be understood as a bet between two parties, each assumingtha t the market will move the way that they expect. In old times derivatives were mainly used to managed risk, for instance by securing fixed price for some asset in the future. One of the types of derivatives are options that provide the right, but not the obligation, to engage in a future transaction on some fixed conditions. The transaction as such does not need to concern assets or securities, for instance the option can be exercise on certain services. In the paper we show that low-cost airlines’ tickets can be described as an option contract. While it is temptingto plug-in our description into known models for option valuation, we choose more practice oriented approach. We take into account the real life constrains and airlines’ regulations we present a realistic model for option valuation. In such a framework we show that, in principle, an arbitrage is possible. We conclude the paper with remarks on buildingan d optimizingp ortfolio of such assets, having in mind speculation/trading as well as corporate hedging.
Źródło:
Mathematica Applicanda; 2008, 36, 50/09
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-Cost Data Acquisition Unit for Flight Tests
Autorzy:
Morawski, Błażej
Głowacki, Dominik
Głowacka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/98014.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
helicopter flight test
LabVIEW
Arduino
Opis:
The purpose of this paper is to present the design of a data recorder for flight tests of a full-scale aircraft and an UAV. The recorder is built based on the Arduino microprocessor platform and LabVIEW development environment. The data recorder will be used mainly for helicopter flight tests.
Źródło:
Fatigue of Aircraft Structures; 2019, 11; 121-130
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-Cost Dynamic Constraint Checking for the JVM
Autorzy:
Grzanek, K.
Powiązania:
https://bibliotekanauki.pl/articles/108744.pdf
Data publikacji:
2016
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
formal software verification
software quality
dynamic type-checking
functional programming
category theory
Clojure
Opis:
Using formal methods for software verification slowly becomes a standard in the industry. Overall it is a good idea to integrate as many checks as possible with the programming language. This is a major cause of the apparent success of strong typing in software, either performed on the compile time or dynamically, on runtime. Unfortunately, only some of the properties of software may be expressed in the type system of event the most sophisticated programming languages. Many of them must be performed dynamically. This paper presents a flexible library for the dynamically typed, functional programming language running in the JVM environment. This library offers its users a close to zero run-time overhead and strong mathematical background in category theory.
Źródło:
Journal of Applied Computer Science Methods; 2016, 8 No. 2; 115-136
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-cost Monitoring System of a Sitting Posture
Autorzy:
Sieniawski, M.
Dimitrova-Grekov, T.
Klimowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/114379.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sitting position monitoring
RaspberryPi
graphical user interface
database
Opis:
The article presents a description of sitting posture monitoring system, built on Raspberry_Pi_3b, Tact Switch buttons, a prototype board and a rubber mat. RaspberryPi connected to the sensors communicated with a personal computer. This allows on the one hand to immediately inform the seated about the appearance of no symmetry of the position on the chair and managing the time of sitting and breaks on the other. The proposed system ensures identification of the degree of incorrect seating during work and gives the opportunity to improve the user's posture, which affects many topics related to health and work efficiency. System possesses a graphical user interface. During system operation, monitoring data is collected and can be used for further research towards an optimal impact on the user to get rid of the faulty sitting habits.
Źródło:
Measurement Automation Monitoring; 2018, 64, 1; 11-13
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
LOCAAS [Low-Cost Autonomous Attack System] dla Predatora.
Powiązania:
Aklot 2002, nr 3, s. 25-26
Data publikacji:
2002
Tematy:
LOCAAS (pocisk rakietowy) budowa i konstrukcje Stany Zjednoczone
Samoloty bezzałogowe uzbrojenie system Stany Zjednoczone
Pociski rakietowe kierowane klasy powietrze-ziemia budowa i konstrukcje Stany Zjednoczone
Opis:
Oprac. na podst. "Jane's Defense Weekly". --- 2002, 27 II; "AeroWorldNet". --- 2002, 4 III.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Low-cost evoked potentials detection for brain computer-interfaces
Autorzy:
Jukiewicz, M.
Cysewska-Sobusiak, A.
Powiązania:
https://bibliotekanauki.pl/articles/97604.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
brain-computer interface
detection of evoked potentials
EEG
signal processing
MATLAB
Opis:
Evoked potentials are one of the brain's electrical activity types. They appear on the human scalp as a result of a registration of an external stimulus (e.g. an appearance or a change of a sound, a flash of light or an image). Generally, they are used in medical diagnosis, but they also may be used in brain-computer interfaces. In this chapter a laboratory set for the acquisition and analysis of evoked potentials is described. The main part of this set is a photostimulator consisting of sixteen LEDs and the ATmega 328 microcontroller. The software created by the authors allows for: connection between EEG device, stimulator and computer, input stimulus control, output signal filtering and its classification. The presented set may support a process of brain-computer interface design.
Źródło:
Computer Applications in Electrical Engineering; 2015, 13; 102-110
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Particle swarm optimization algorithm based low cost magnetometer calibration
Autorzy:
Ali, A.
Siddharth, S.
Syed, Z.
El-Sheimy, N.
Powiązania:
https://bibliotekanauki.pl/articles/129567.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geodetów Polskich
Tematy:
artificial intelligence
systems
measurement
navigation
algorithm
sensor
sztuczna inteligencja
systemy
pomiar
nawigacja
algorytm
Opis:
Inertial Navigation Systems (INS) consist of accelerometers, gyroscopes and a microprocessor provide inertial digital data from which position and orientation is obtained by integrating the specific forces and rotation rates. In addition to the accelerometers and gyroscopes, magnetometers can be used to derive the absolute user heading based on Earth’s magnetic field. Unfortunately, the measurements of the magnetic field obtained with low cost sensors are corrupted by several errors including manufacturing defects and external electro-magnetic fields. Consequently, proper calibration of the magnetometer is required to achieve high accuracy heading measurements. In this paper, a Particle Swarm Optimization (PSO) based calibration algorithm is presented to estimate the values of the bias and scale factor of low cost magnetometer. The main advantage of this technique is the use of the artificial intelligence which does not need any error modeling or awareness of the nonlinearity. The estimated bias and scale factor errors from the proposed algorithm improve the heading accuracy and the results are also statistically significant. Also, it can help in the development of the Pedestrian Navigation Devices (PNDs) when combined with the INS and GPS/Wi-Fi especially in the indoor environments.
Źródło:
Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2011, 22; 9-23
2083-2214
2391-9477
Pojawia się w:
Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NOX-reduction on HD-vehicles-low cost quality check
Autorzy:
Czerwinski, J.
Zimmerli, Y.
Mayer, A.
Heeb, N.
Berger, H.
D‘Urbano, G.
Powiązania:
https://bibliotekanauki.pl/articles/246300.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
Diesel particle filter
regeneration of DPF
non-legislated emissions
selective catalytic reduction SCR
NOx-reduction
SCR-quality testing
on vehicle testing
Opis:
The NOx reduction of recent HD-vehicle is performed mostly by means of the selective catalytic reduction SCR. There are some manufactures and some applications of SCR as retrofit systems (mostly for the low emission zones LEZ and in combination with a DPF). In charge of Swiss authorities AFHB investigated several SCR-systems, or (DPF+SCR)-systems on HD-vehicles and proposed a simplified quality test procedure of those systems. This procedure can especially be useful for the admission of retrofit systems but it can also be helpful for the quality check of OEM-systems. In the present paper the test procedures will be described and some examples of specific results will be presented. As general conclusions it can be stated: – the foundations for the quality verification procedures of SCR-systems are established, – the SCR-systems are not active at lower temperatures < 200°C, – SCR-testing on vehicle is a simple & low-cost tool for quality check, – the overall average NOx reduction rate depends on the operating profile of the vehicle – for low-load, for cold operation and for interrupted operation (HEV) there are lower NOx reduction efficiencies.
Źródło:
Journal of KONES; 2013, 20, 2; 61-68
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A low-cost system for supporting drivers in traffic jams
Autorzy:
Hołubowski, Waldemar
Frankiewicz, Ryszard
Kusiński, Sławomir
Sikora, Andrzej
Zielonka, Adam
Powiązania:
https://bibliotekanauki.pl/articles/27314059.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
IoT
distance sensor
low cost system
czujnik odległości
system niskokosztowy
Opis:
Cases of heavy traffic congestion (commonly referred to as traffic jams) have negative influences on the economy, public health, and social life. This makes it important to assist drivers in these situations with Internet of Things (IoT) systems. The aim of this article is to present a low-cost device that supports driving in traffic jams. The system, which is based on data from a laser sensor with a range of up to 40 m, controls the distances to vehicles in front of and behind a moving car. Through audio and video signals, it warns the driver whether the vehicle in front of or behind the equipped vehicle is too close. This allows the driver to control the distance and avoid minor collisions.
Źródło:
Transport Problems; 2023, 18, 1; 103--115
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-cost IR system for thermal characterization of electronic devices
Autorzy:
Kopeć, M.
Więcek, B.
Powiązania:
https://bibliotekanauki.pl/articles/114060.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thermal impedance
Foster network
thermal time constants
temperature measurement
Opis:
In this article, a Low-cost measurement Infra-Red (IR) system for dynamic thermal testing of electronic devices is described. The element is powered by a step-function current and simultaneously temperature is measured by a fast single-detector IR head. The thermal impedance Zth(jω) is calculated using the Laplace transform and the Foster network is to get thermal time constants distribution.
Źródło:
Measurement Automation Monitoring; 2018, 64, 4; 103-107
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calibration low-cost cameras with wide-angle lenses for measurements
Autorzy:
Wierzbicki, D.
Powiązania:
https://bibliotekanauki.pl/articles/384304.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
sensors
measurements
camera calibration
videos
accuracy
czujnik
pomiary
kalibracja kamery
filmy video
precyzja
Opis:
So far too many examinations concerning the possibility of the application action cameras weren’t conducted in UAV photogrammetric studies. However in the recent time development of the action cameras production technology he let receive sensors which are light, userfriendly, and most importantly can gain images and video sequences of high resolution. The essential meaning has taking into account the camera’s influencing factors in UAV photogrammetry. Due to the fact that the action cameras are non-metric cameras the significant influence on the quality of photogrammetric studies has a stability internal orientation of elements of such cameras. Within the framework of carried out research calibration of five GoPro Hero 4 Black. The calibration of cameras was carried out on different calibration tests in the GML Camera Calibration Toolbox and Agisoft Lens software. Different calibration setups and processing are presented and discussed in this article. Additionally a repetitiveness of achieved results of the calibration was examined in five GoPro cameras Hero 4 Black. Dedicated calibration templates in the form of chessboards were used to the calibration. As a part of the research a comparative analysis of the results have been done. Based on performed examinations a repetitiveness of determined internal orientation elements was checked under different video acquisition modes.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 2; 45-51
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Long range measurements using a contactless low cost optical sensor
Autorzy:
Krelling, P C L
Gonzalez-Jorge, H.
Armesto, J.
Arias, P.
Powiązania:
https://bibliotekanauki.pl/articles/174034.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
laser scanning
accuracy
optical sensor
Opis:
Length measurement is very common in many industrial applications and there is a number of instrumentation involved, mainly dependent on the range and accuracy requirements. In this work, a contactless optical measurement unit is developed. It is based on a mouse sensor and an external laser source. The system is calibrated using an optical board and an electronic distance measuring system. Accuracy and precision of the system is evaluated using the reference data from a total station. Values of 1 mm and 0.3 mm are respectively obtained. Length range during the experiment is 8.5 m. The data of the optical measurement unit are compared with those obtained from a commonly used wheel encoder. Results from the optical sensor of the mouse improve the encoder data.
Źródło:
Optica Applicata; 2013, 43, 3; 435-440
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fighting Volume Crime : an Intelligent, Scalable, and Low Cost Approach
Autorzy:
Arraiza, J.
Aginako, N.
Kioumourtzis, S.
Leventakis, G.
Stavropoulos, G.
Tzovaras, D.
Zotos, N.
Sideris, A.
Charalambous, E.
Koutras, N.
Powiązania:
https://bibliotekanauki.pl/articles/2069272.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
volume crime
petty crime
surveillance systems
Opis:
Volume Crimes (aka petty crimes) take place on a daily basis affecting citizens, local communities, as well as business and infrastructure owners. In this paper, we present a novel intelligent surveillance solution (P-REACT) that integrates video and audio analytics both on-site (using an embedded platform connected to local sensors) and centrally on a cloud service. This intelligent surveillance system has been conceived and designed to anticipate volume crimes in areas where video surveillance is allowed by current legislation and more specifically in shops and public transportation systems; intended as a modular and low cost solution. The capability of dynamically adapting the analytic algorithms that are performed on-site provides a more accurate detection of crime evidences.
Źródło:
Journal of Polish Safety and Reliability Association; 2015, 6, 3; 1--8
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-cost removal of basic red 9 using cow dung ash
Autorzy:
Arya, Raj Kumar
Meena, Ghanshyam
Thapliyal, Devyani
Barman, Sanghamitra
Halder, Gopinath
Shandilya, Pooja
Powiązania:
https://bibliotekanauki.pl/articles/2173437.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adsorption isotherms
adsorption kinetics
dye removal
low-cost adsorbent
cow dung
ash
izotermy adsorpcji
kinetyka adsorpcji
usuwanie barwnika
tani adsorbent
krowie łajno
popiół
Opis:
In the present study, basic red 9 had been removed from synthetic waste water using animal waste. Cow dung ash had been prepared and characterized by scanning electron microscope. Morphology analysis shows very fine particles of less than 1 μm. The pH analysis study favours a pH of 8.5 for maximum dye removal. The removal of basic red 9 was very fast on cow dung ash. Percentage dye removal was 80.24% and 95.24 in 5 minutes and 90 minutes, respectively at initial dye concentration of 10 ppm.
Źródło:
Chemical and Process Engineering; 2022, 43, 2; 229--242
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-cost, low-resolution IR system with super-resolution interpolation of thermal images for industrial applications
Autorzy:
Więcek, P.
Sankowski, D.
Powiązania:
https://bibliotekanauki.pl/articles/114076.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Super-resolution
residual deep neural networks
image interpolation
Opis:
In this paper authors present application of deep neural networks for super-resolution interpolation of infrared images. A residual neural network with reduced number of layers was used. The transfer learning using RGB visual images was applied in this research. The validation of the network was performed for 32×24 and 160×120 pixels infrared images, with the up-sampling scale factors 2, 3, 4, 5 and 6. Monitoring of high temperature industrial processes like inductive heating and thermal hardening is the main application of proposed methods.
Źródło:
Measurement Automation Monitoring; 2018, 64, 4; 108-111
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja niskokosztowej platformy edukacyjnej
The Concept of Low-cost Educational Platform
Autorzy:
NYCZ, MARIUSZ
NIENAJADŁO, SARA
HAJDER, MIROSŁAW
Powiązania:
https://bibliotekanauki.pl/articles/457179.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski
Tematy:
Raspberry Pi
Scratch
nauka programowania
programming learning
Opis:
W pracy przedstawiono koncepcje niskokosztowej platformy edukacyjnej. Autorzy prezentują rozwiązania sprzętowe oraz programowe, których głównym celem jest podniesienie jakości edukacji informatycznej w szkołach podstawowych i gimnazjalnych.
This article presents concept of low-cost educational platform. The authors introduce soft-ware and hardware solutions which can help increase quality of IT education in primary and middle schools.
Źródło:
Edukacja-Technika-Informatyka; 2017, 8, 2; 237-242
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthetic Gas Production from Fine Coal Gasification Using Low-Cost Catalyst
Autorzy:
Andican, Akbar
Faizal, Muhammad
Said, Muhammad
Aprianti, Nabila
Powiązania:
https://bibliotekanauki.pl/articles/2086400.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
syngas
natural zeolite
thermochemical process
energy
Opis:
The utilisation of fine coal waste is still limited, even though its availability is very abundant in the mining industry. This study utilises fine coal by converting it into syngas through catalytic gasification. The gasification process was carried out at a temperature range of 350–550°C for 10–50 minutes using natural zeolite as a catalyst. The syngas composition and quality parameters were evaluated through the H2/CO ratio, heating value, and gasification efficiency. From the research results, fine coal contained high amounts of carbon and fixed carbon. Temperature is the variable that most influences the gasification process. The addition of zeolite actively increased the CO content in the syngas. The H2/CO ratio of syngas >1, the highest HHV and LHV 16.15 and 14.46 MJ/Nm3 with the highest carbon conversion efficiency value of 88.85%, made fine coal very suitable to be used as raw material for the gasification process to produce environmentally friendly syngas.
Źródło:
Journal of Ecological Engineering; 2022, 23, 5; 64--72
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a practical approach to low-cost ad hoc wireless networking
Autorzy:
Gburzyński, P.
Olesiński, W.
Powiązania:
https://bibliotekanauki.pl/articles/308509.pdf
Data publikacji:
2008
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
ad hoc wireless networks
sensor networks
operating systems
reactive systems
specification
simulation
Opis:
Although simple wireless communication involving nodes built of microcontrollers and radio devices from the low end of the price spectrum is quite popular these days, one seldom hears about serious wireless networks built from such devices. Most of the commercially available nodes for ad hoc networking (somewhat inappropriately called "motes") are in fact quite serious computers with megabytes of RAM and rather extravagant resource demands. We show how one can build practical ad hoc networks using the smallest and cheapest devices vailable today. In our networks, such devices are capable of sustaining swarm-intelligent sophisticated routing while offering enough processing power to cater to complex applications involving distributed sensing and monitoring.
Źródło:
Journal of Telecommunications and Information Technology; 2008, 1; 29-42
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Study of Iron Removal from Groundwater Using Low Cost Adsorbents
Autorzy:
Raheem, Shahad A.
Kadhim, Entidhar Jawad
Abdulhasan, Maryam Jawad
Powiązania:
https://bibliotekanauki.pl/articles/2202201.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
groundwater contamination
iron removal
adsorption
filtration
drinking water
sawdust
barley husk
Opis:
Iron is one of the groundwater contaminants that negatively impact health and the environment. This study is attempted at introducing low cost natural adsorbent for that adsorbs iron from synthetically prepared iron water. Sawdust and barley husks were used as a filter media, either alone or at different mixing ratio of sawdust/barley husks (1:1, 0.5:1, 1:0.5), to study the effect of adsorbent dose on the removal efficiency. Synthetic water of iron was used at different initial concentrations (10, 25, 40, 65, and 80) mg/L to study the effect of initial iron concentration on the removal efficiency. The filtration process was conducted at a surface loading rate of 3 m3/m2.hr. The results showed higher removal efficiency with the increase of iron initial concentration. The results indicated that removal of iron ranged (90–99.34%) for all types of filter media. The best removal was found to be 99.34% at a mixing ratio of 0.5:1 (sawdust/barley husks) at 80 mg/L initial concentration. As a conclusion, Removal of iron was very successfully observed with absorbent materials sawdust and barley husk, which makes the treatment of iron even possible in rural areas and when high concentration of iron is present.
Źródło:
Journal of Ecological Engineering; 2022, 23, 11; 18--23
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Matlab Implementation of Differential GPS for Low-cost GPS Receivers
Autorzy:
Ali, Q
Montenegro, S.
Powiązania:
https://bibliotekanauki.pl/articles/116127.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
marine navigation
Global Positioning System GPS
Matlab, Differential GPS (DGPS)
GPS Receiver
unmanned aerial vehicle (UAV)
Global Navigation Satellite System (GNSS)
RINEX Format
Opis:
A number of public codes exist for GPS positioning and baseline determination in off-line mode. However, no software code exists for DGPS exploiting correction factors at base stations, without relying on double difference information. In order to accomplish it, a methodology is introduced in MATLAB environment for DGPS using C/A pseudoranges on single frequency L1 only to make it feasible for low-cost GPS receivers. Our base station is at accurately surveyed reference point. Pseudoranges and geometric ranges are compared at base station to compute the correction factors. These correction factors are then handed over to rover for all valid satellites observed during an epoch. The rover takes it into account for its own true position determination for corresponding epoch. In order to validate the proposed algorithm, our rover is also placed at a pre-determined location. The proposed code is an appropriate and simple to use tool for post-processing of GPS raw data for accurate position determination of a rover e.g. Unmanned Aerial Vehicle during post-mission analysis.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 343-350
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 186

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