No (2649)
Number of found documents:
2649
Trends in development of aircraft for regional routes: impact on the european air transportation system
Nõmmik, Allan
English
The beginning of the twenty-first century in air transportation is characterized by increasing competition between (regular, i.e. not low-cost) airlines, which in its turn affects the low cost airlines by necessitating for them the operating of aircraft with larger seat capacity also on local routes, with the goal of operating the aircraft at lower cost per available seat kilometer. Taking into account the importance of air connections for the regional economy, the local authorities are obligated to support regional airports and impose public service obligations on some routes. This study examines the regional aircraft development after the air transportation market liberalization, while also delving into the background of differences in environments of operation in Europe and United States. To evaluate the regional routes’ equipment competitiveness, this research is focusing on to the regional aircraft fuel consumption which is the considerable factor for airline’s operating costs. Analysis of the differences between operating environments in Europe and the United States is based on an earlier review of the research findings on development of the markets after liberalization, and the role regional aircraft in air transportation system. Also, the comparisons of the profitability and airlines’ strategies in both regions are given. The results provide insights into the main drivers of regional aircraft design and development from the demand’s point of view.
Keywords:
Regional aircraft; air transportation system; Public Service Obligations
Available in a digital repository NRGL
Trends in development of aircraft for regional routes: impact on the european air transportation system
The beginning of the twenty-first century in air transportation is characterized by increasing competition between (regular, i.e. not low-cost) airlines, which in its turn affects the low cost ...
Modelling of health monitoring signals and detection areas for aerospace structures
Šplíchal, Jan; Hlinka, Jiří
Czech
This paper is focused on Structural Health Monitoring (SHM) for aerospace use. It analyses the performance of commercially available finite element (FE) software packages for the simulation of propagation of ultrasonic guided waves (UGW) in typical aerospace structures. The purpose of the research is to support activities leading to the introduction of UGW based health monitoring on aerospace structures, as well as to support the design of future structures with integrated health monitoring. Activities are demonstrated on panels with growing complexity (adding different materials, sensors, damage types etc.). FE simulations are used to identify “detection areas” of UGW sensors. This output can be directly applied to the design of future aerospace structures with an integrated SHM system (to ensure the proper planning of the placement of UGW sensors).
Keywords:
Structural health monitoring (SHM); Ultrasonic guided waves (UGW); Finite element methods (FEM); damage detection
Available in a digital repository NRGL
Modelling of health monitoring signals and detection areas for aerospace structures
This paper is focused on Structural Health Monitoring (SHM) for aerospace use. It analyses the performance of commercially available finite element (FE) software packages for the simulation of ...
Convolutional Neural Networks For Identification Of Axial 2d Slices In Ct Data
Vavřinová, Pavlína
This thesis deals with the classification of 2D axial slices in CT patient’s data. The classification is realized into six categories. The sphere of convolutional neural networks was used for this purpose and AlexNet network was specifically selected for the intention of this identification, which was applied to the created data set after being adaptated. The overall classification success rate was 84%. In addition, an analysis of mistakes in classification was performed.
Keywords:
neural networks; deep learning; convolutional neural networks; AlexNet
Available in a digital repository NRGL
Convolutional Neural Networks For Identification Of Axial 2d Slices In Ct Data
This thesis deals with the classification of 2D axial slices in CT patient’s data. The classification is realized into six categories. The sphere of convolutional neural networks was used for this ...
Adjustable Filter With Fractional-Order Element
Kubát, Pavel
Slovak
This paper deals with fractal-order frequency filter, its design methods and practical use. The proposed filter consists of operational transconductance amplifiers (OTAs), adjustable current amplifier (ACA), dual-output current follower (DO-CF) and fractional-order capacitor (FOE). The approximation of fractional-order capacitor is used for the design fractal order frequency filter. The last part of this paper shows simulation results of the proposed cicuit.
Keywords:
fractional-order; frequency filter; approximation; fractional-order element
Available in a digital repository NRGL
Adjustable Filter With Fractional-Order Element
This paper deals with fractal-order frequency filter, its design methods and practical use. The proposed filter consists of operational transconductance amplifiers (OTAs), adjustable current amplifier ...
Water Leakage Monitor For Home Usage
Radvanský, Martin
Water can cause significant damage to the house and can not be avoided if the owner does not know the problem in time. This article describes a universal device with wireless sensors, designed to monitor water leakage in the house with ability to inform the owner about this particular problem.
Keywords:
Water leakage monitor; IQRF; Battery operated sensor; Raspberry Pi
Available in a digital repository NRGL
Water Leakage Monitor For Home Usage
Water can cause significant damage to the house and can not be avoided if the owner does not know the problem in time. This article describes a universal device with wireless sensors, designed to ...
Automatic Music Transcription
Matoušek, Vojtěch
This article deals with the automatic music transcription into the music notation by short Fourier transform with logarithmic scale. The result of this work is application, which converts the music records, in the wave file, into the music notation. But the algorithm can work only with music records, where plays one tone at one time.
Keywords:
automatic music transcription; short Fourier transform with logarithmic scale
Available in a digital repository NRGL
Automatic Music Transcription
This article deals with the automatic music transcription into the music notation by short Fourier transform with logarithmic scale. The result of this work is application, which converts the music ...
Online Timekeeper System For Relay Race
Čenč, Daniel
The race is set on a well-known hill in Beskydy, Javorový vrch. The race has three disciplines, each of them needs individual timekeeper in place. The timekeeping machine contains a single specially customized Raspberry Pi, which has a HW clock circuit and a RFID reader on board. The OS contains a program in Python, which operates the data acquired on input and sends them to the main database. A PHP script then makes use of these data by displaying them on a website.
Keywords:
Python; relay race timekeeper; Raspberry Pi
Available in a digital repository NRGL
Online Timekeeper System For Relay Race
The race is set on a well-known hill in Beskydy, Javorový vrch. The race has three disciplines, each of them needs individual timekeeper in place. The timekeeping machine contains a single specially ...
Integrated Temperature Sensor Bipolar Core
Fránek, Jakub
Analog front-end of a bipolar transistor based smart temperature sensor was designed in 110 nm CMOS processing technology TSMC 110 and verified using simulation taking PVT variation into account. The analog front-end of the sensor achieves 3s inaccuracy of +-3.5 °C untrimmed or +-0.7 °C after single point trim over the military temperature range (-55 °C to 125 °C), requiring supply voltage of 2.7-3.63 V, consuming as little as 1μW at 1 S/s and taking up less than 0:012mm2.
Keywords:
bipolar; smart temperature sensor; CMOS; analog; integrated circuit; IP core
Available in a digital repository NRGL
Integrated Temperature Sensor Bipolar Core
Analog front-end of a bipolar transistor based smart temperature sensor was designed in 110 nm CMOS processing technology TSMC 110 and verified using simulation taking PVT variation into account. The ...
Xrd Characterization Of Graphite For
Electrochemical Power Sources
Klvač, Ondřej
The article describes possibilities for research method of graphene atomic structure as electrochemical power source electrode. At first there is a computation of difractogram maximums and intensities. Next part compares real measurements and conclusions of previous theoretical part. At this point comes determination of lattice parameters. As last part there is an interaction of graphite by lithium ions and discussion of important results.
Keywords:
XRD; diffraction; X-ray; graphite; intercalation; Li-ion; primitive cell
Available in a digital repository NRGL
Xrd Characterization Of Graphite For
Electrochemical Power Sources
The article describes possibilities for research method of graphene atomic structure as electrochemical power source electrode. At first there is a computation of difractogram maximums and ...
Position Sensor For Dynamic Verticalization
Hláčiková, Michaela
Slovak
Dynamic verticalizer is a device designed for the rehabilitation of patients with lower limbs disabilities. The aim of this study is to construct a motion sensor prototype that controls computer games in the rehabilitation process by moving the patient body.
Keywords:
Dynamic verticalizer; position sensor; Arduino Leonardo Pro Micro; MPU-6050; HC-05
Available in a digital repository NRGL
Position Sensor For Dynamic Verticalization
Dynamic verticalizer is a device designed for the rehabilitation of patients with lower limbs disabilities. The aim of this study is to construct a motion sensor prototype that controls computer games ...
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