Analysis of Comfort Parameters in Special Purpose Vehicles from Technological Development Point of View

The analysis of comfort parameters in the crew cabin space of two variants of the special purpose off-road vehicle is presented, taking technological development aspects into account. Tests of noise, vibration and heating - cooling efficiency have been performed in realistic operating conditions, during the intensive driving on three selected test tracks, in order to ensure the repeatability of the obtained results. Measuring of noise and vibration levels at the drivers, co-drivers and crew members' seats were performed at strictly defined vehicle speed. Heating efficiency tests for the cabin have been performed in laboratory conditions, inside a cold chamber with the constant temperature of (-16 degrees C), whereas cooling efficiency tests were conducted in the hot chamber at the temperature of (+ 40 degrees C). The results of these tests enable the selection of a more comfortable variant of vehicle, wherein the one with less seats for passengers in the cabin which, in addition to more comfort also has the advantage of greater storage space, and from the application flexibility standpoint, which is offered by the possibility of transporting more passengers and less load, such vehicles offer better environment control from within the vehicle

A novel carbon paste electrode modified by NP-Y2O3 doped with the g-C3N4 for sensitive electrochemical detection of herbicide bentazone in river, soil, and vegetable samples

Pesticides have a significant role in the world food chain in the setting of rising agricultural output demand and rising climate change impacts on agricultural productivity. Pesticide contamination across the world is not just a pressing issue; it also has the potential to get worse, for instance, because of movements in global production to nations with laxer environmental regulations [1]. In this work, we have designed a new electrochemical sensor for detecting bentazone (BZT) by using NP-Y2O3/g-C3N4 modified carbon paste electrode (CP). For the first time, the Pechini method was employed to synthesize the Y2O3 nanocomposite. The nanomaterial was characterized by Xray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In order to create an analytical technique for identifying and measuring BZT, the electrocatalytic characteristics of the suggested Y2O3/g-C3N4 modified CP electrode were examined. Using the CV and DPV approaches, the electrochemical behavior of BZT at the Y2O3/gC3N4 sensor was investigated. The proposed electrochemical sensor exhibited excellent electrochemical response toward BZT with a wide linear range of 1 to 100 µM, with a detection limit of 0.68 µM. The effect of possible interfering agents is negligible, confirming the good selectivity of the method. The sensor also displayed excellent sensitivity, reproducibility, and stability. Additionally, the Y2O3/g-C3N4 sensor was utilized for the detection of BZT in water and soil samples, and also in red and green pepper samples, and it exhibited good recovery results

Natural Language Processing: Analysis of Information Technology Students’ Spoken Language

Tato bakalářská práce se zabývá problematikou nových technologií umělé inteligence při zpracování přirozeného jazyka. Práce je rozdělena na teoretickou a analytickou část. Teoretická část přistupuje k problému rozdělením do tří kapitol: umělá inteligence a statistika, zpracování přirozeného jazyka a IBM Watson Natural Language Understanding. Každá z těchto kapitol je rozpracována včetně uvedení alespoň jednoho příkladu z praxe. V první kapitole je hlavním cílem vymezit teoretický rámec umělé inteligence a jejích postupů, zatímco ve druhé kapitole je vysvětlena problematika zpracování přirozeného jazyka a jeho primární funkce včetně jeho vztahu k samotné umělé inteligenci. Cílem třetí kapitoly je představit porozumění přirozenému jazyku jako primární nástroj pro analýzu, která je realizována v analytické části práce. Analytická část se zabývá analýzou mluveného jazyka studentů prostřednictvím různých metod. Transkripce shromážděných vzorků videí je provedena strojovým překladem jako aplikací zpracování přirozeného jazyka, zatímco textový výstup je analyzován prostřednictvím nástroje porozumění přirozenému jazyku. V analytické části, která popisuje výzkumnou metodologii, prezentuje a interpretuje výsledky výzkumu, jsou využívány aplikované znalosti z teoretické části práce.This bachelor’s thesis deals with the issue of new artificial intelligence technologies in natural language processing. The thesis consists of a theoretical part and an analytical part. The theoretical part approaches the issue by dividing it into three chapters: artificial intelligence and statistics, natural language processing, and IBM Watson Natural Language Understanding. Each of these chapters is elaborated on by using at least one example from the real world. In the first chapter, the main aim is to frame the theoretical framework of artificial intelligence and its practices, while in the second chapter, natural language processing and its primary functions are explained as well as its relation to artificial intelligence itself. The aim of the third chapter is to introduce natural language understanding as the primary tool for analysis which is done in the analytical part. The analytical part deals with the analysis of students’ spoken language using various methods. Collected video samples are transcribed by means of a machine translator as a natural language processing application, while the textual output is analysed through a natural language understanding engine. The applied knowledge from the theoretical part is used in the analytical part that includes the description of research methodology, presentation and interpretation of research results.

Sensitivity of standard and stacked RADFET dosimeters

Radiation Sensing Field Effect Transistors (RADFETs), also known as MOSFET dosimeters, are discrete p-channel MOSFETs with the gate oxide engineered for increased radiation sensitivity. RADFETs are small, require very little or no power during operation, read-out is simple and non-destructive, and their electronic signal is suitable for integration with the electronics systems. For these reasons RADFETs have found applications in quality assurance of radiotherapy, dose monitoring in high energy physics laboratories, accidental personal dosimetry, and space. Lower dose applications, such as e.g. occupational personal dosimetry and radiology, are currently out of reach owing to inherent sensitivity limits of the standard RADFET technology. Tyndall National Institute has been involved in RADFET research and development, fabrication, and commercialisation for several decades and has acquired significant experience in the technology and applications. This paper presents Tyndall recent efforts in RADFET manufacturing and characterisation for different applications and discusses possible approaches towards increased sensitivity of the technology, including standard and stacked RADFETs.Fourth International Conferenceon Radiation and Applications in Various Fields of Research, RAD 2016, May 23-27, 2016, Niš, Serbi

Development of RADFET detector for personal dosimeter system for European astronauts

Radiation environment in space is very complex, with varying contributions from photons, electrons, protons, and heavy ions. There is a need to measure radiation dose received by the astronauts onboard International Space Station (ISS), and the European Space Agency (ESA) has been supporting a collaborative research project aimed at development of a personal dosimeter for European astronauts at ISS. The development of the personal dosimeter system is in the final phase, with the launch expected in the second half of 2015. The system is called “European Crew Personal Active Dosimeter (EuCPAD)” and consists of a base unit and several mobile units. Base unit is stationery and houses system electronics, Tissue Equivalent Proportional Counter (TEPC), and charging slots for mobile units. Mobile units are worn by the astronauts during their daily activities and consist of four dosimetric modules: thin silicon diode, thick silicon diode, Direct Ion Storage (DIS) dosimeter, and Radiation Sensing Field Effect Transistor (RADFET). We describe the EuCPAD system and our efforts in development of the RADFET module for the EuCPAD mobile unit.Third International Conferenceon Radiation and Applications in Various Fields of Research, RAD 2015, June8-12, 2015, Budva, Montenegr

Wear simulation of the polymer based composite sliding bearings by means of ansys

Polymer based composite sliding bearings are increasingly applied in many industries, due to their economic (usually low cost of production) and technical (good tribological properties) benefits. In order to predict their life cycle, it is necessary to perform numerous experiments and evaluate their wear rate. This is generally quite expensive and time consuming. By applying only one series of the experiments and determining Archard’s wear coefficient, and embedding it into the code of the Ansys software, it is possible to simulate the wear, and thus save the time and the financial resources. This paper explains the procedure of the wear simulation in case of known Archard’s coefficient, for sliding bearings made of PTFE polyamide composite material in contact with shaft of steel. The output of the simulation is the contact pressure in relation of time and the amount of worn volume for 3 revolutions of the shaft

THE INFLUENCE OF STRENGTH ON THE RESULTS OF THE VORTEX THROW

The aim of this paper was to determine the influence of strength on the results of the vortex throw. The research was carried out on a sample of 50 children aged 7 to 10, using the following measuring instruments for the evaluation of strength: the standing long jump, throwing a medicine ball from a supine position, torso lifts for 30 s knees bent, the plank and hanging leg raises. The research also included one measuring instrument for the evaluation of the distance in the vortex throw (the criterion variable). Based on the obtained results, it can be concluded that strength has a statistically significant influence on the results of the vortex throw among children aged 7 to 10 with a shared variability of approximately 43%. The greatest part of this significance can be ascribed to the tests of the medicine ball throw from a supine position which is responsible for the evaluation of the strength of the arms and shoulder belt. There were also significant correlations of the variables the standing long jump and torso lifts for 30 s knees bent with the result in vortex throw, but they did not significantly affect the results for this age group

Stabilnost dimenzija ploča od uslojenog drva izrađenih od toplinski modificiranih topolovih furnira u uvjetima promjenjive vlažnosti zraka

Some properties of plywood panels made from untreated and thermally modified (90 min. at 200 ºC) poplar veneers and their combinations have been analyzed. The change in equilibrium moisture content and the change in dimensions of the samples conditioned above water in closed containers were examined. The analysis using F-test (ANOVA) at the significance level of 95% confirmed that, regarding moisture content, all combinations of plywood panels differed significantly from the control panels. However, the analysis of thickness swelling showed that there was no significant difference among the plywood panels of similar construction. The highest values of anti-swelling efficiency were shown by plywood panels made from thermally modified veneers.U radu su istražena neka svojstva ploča izrađenih od nemodificiranih i od termički modificiranih (90 min pri 200 ºC) topolovih furnira te njihovih kombinacija. Istraživana je promjena ravnotežnog sadržaja vode i promjene dimenzija uzoraka u uvjetima iznad vode u zatvorenim posudama. Analiza uz pomoć F-testa (ANOVA) na razini značajnosti od 95 % potvrdila je da se, s obzirom na sadržaj vode, sve ispitne ploče znatno razlikuju od kontrolnih ploča. Međutim, analiza podataka o debljinskom bubrenju pokazala je da ne postoji značajna razlika između ploča slične konstrukcije. Najveću učinkovitost u sprječavanju debljinskog bubrenja pokazale su ploče izrađene od toplinski modificiranih furnira

Calculation of the Archard's wear coefficient of the polymer-based composite sliding bearings

Prediction and calculation of wear of the mechanical components in contact is one of the most important tasks in modern engineering. Due to time consumptive experiments and quite expensive test rig, it became even more challenging to evaluate wear by means of the computer simulation instead of the real experiments. With rapid improvement of the computer resources, this task became more realistic, and the results are more concurrent to those obtained by experiments. Since the most of the solvers evaluate wear by means of the Archard's equation, to perform the simulation it is mandatory to determine Archard's coefficient K. This paper provides necessary steps, experimental investigations and measurements in order to calculate Archard's coefficient K, as an input value for the simulation of wear of the polymer-based composite sleeve bearings