Acta Technica Jaurinensis

Acta Technica Jaurinensis

Basic info

  • Publisher: Szechenyi Istvan University
  • Country of publisher: hungary
  • Platform/Host/Aggregator: Open journal system ojs
  • Date added to EuroPub: 2019/Sep/29

Subject and more

  • LCC Subject Category: Engineering, Multidisciplinary
  • Publisher's keywords: Engineering, Multidisciplinary
  • Language of fulltext: english
  • Time from submission to publication: 14 weeks

Publication charges

  • Article Processing Charges (APCs): No
  • Submission charges: No
  • Waiver policy for charges? No

Open access & licensing

  • Type of License: CC BY-NC
  • License terms
  • Open Access Statement: Yes
  • Year open access content began: 2008
  • Does the author retain unrestricted copyright? True
  • Does the author retain publishing rights? True

Best practice polices

  • Permanent article identifier: DOI
  • Content digitally archived in: Electronic Periodicals Archive of the National Széchényi Library (Budapest, Hungary)
  • Deposit policy registered in: None

This journal has '91' articles

On Generalizations and Improvements to the Shannon-Fano Code

On Generalizations and Improvements to the Shannon-Fano Code

Authors: D Várkonyi, P Hudoba
Year: 2017, Volume: 10, Number: 1
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Abstract

This paper examines the possibility of generalizing the Shannon-Fano code for cases where the output alphabet has more then 2 (n) symbols. This generalization is well-known for the famous Huffman code. Furthermore, we will be looking at possible improvements to the algorithm, as well as other entropy based lossless data compression techniques, based on the same ideas as the Shannon-Fano code. All algorithms discussed in the paper were implemented by us in C++, and we will be illustrating our hypotheses with test results, made on an average performance PC.

Keywords: compression, lossless, entropy, Shannon-Fano
NeuroCar Virtual Driving Environment: Simultaneous Evaluation of Driving Skills and Spatial Perceptual-attentional Capacity

NeuroCar Virtual Driving Environment: Simultaneous Evaluation of Driving Skills and Spatial Perceptual-attentional Capacity

Authors: M Luimula, H Hämäläinen, F Rashid Izullah, A Aho, T Laine, P Qvist
Year: 2017, Volume: 10, Number: 1
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Abstract

We describe here a simple, inexpensive and effective system for simultaneous evaluation of a subject's driving ability and spatial auditory and visual perception and attention. It consists of a commercial steering wheel and virtual glasses and a program for driving on a two-lane road with curvatures at about 100 km/h speed, and simultaneously reacting by pressing two buttons attached to the steering wheel to randomly delivered uni- and bilateral auditory signals via earphones and light dots appearing in the peripheral visual field. Three different difficulty levels of the task were applied in randomized counterbalanced order, each session of 2 min duration. The results of  25 young (17-45 years) and 20 elderly (47-96 years) healthy participants demonstrate  the tendency for simultaneous right side spatial perceptual/attentional bias and the left side driving bias especially in the elderly participants.

Keywords: driving ability, spatial perception, attention, bias, age
Gamified Solutions in Healthcare - Testing Rehabilitation Games in Finland and Asia

Gamified Solutions in Healthcare - Testing Rehabilitation Games in Finland and Asia

Authors: Mika Luimula, Christina Kattimeri, Niina Katajapuu, Paula Pitkäkangas, Helena Malmivirta, Aung Pyae, Tapani Liukkonen, Jouni Smed, Pekka Qvist
Year: 2017, Volume: 10, Number: 1
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Abstract

This paper presents a comprehensive summary of the Gamified Solutions in Healthcare (GSH) research project, which is a joint research project between Turku University of Applied Sciences and the University of Turku. The goal of the project is to promote exercise, social inclusiveness and enhance quality of life, aiming at developing new services and effective activity solutions for the elderly through gamification. During the research project elderly people were included in the development and testing of games so that they could be used for more than just entertainment purposes. According to all of our tests elderly enjoy playing exergames, and digital games can be an effective way to enhance the quality of life of the elderly. In the case studies it was observed that the players where motivated while playing but motivation should also be maintained throughout the gameplay. The elderly gave overall positive feedback for the idea of using digital activity games for exercising.

Keywords: Gamification, Serious Games, Rehabilitation, Usability, Field Experiments
Prediction of Electromagnetic Fields around High Voltage Transmission Lines

Prediction of Electromagnetic Fields around High Voltage Transmission Lines

Authors: G Kulkarni, W Gandhare
Year: 2017, Volume: 10, Number: 1
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Abstract

The electric and magnetic fields are present around the High Voltage Transmisssion Lines (HVTL) and reported to affect health of the workers working on these hotlines. The key parameter reportedly responsible for detrimental health effects, are internal induced fields in body. Induction of internal fields in different organs is heavily dependent on the external fields. Prediction of hazardous levels of external fields before measurement or in situations difficult for direct measurement will lead to identify the restrictive situations and working conditions for hotline workers. This work propose a method to model electric and magnetic field for different climbing routes using hybrid technique, formed by combining support vector machine (SVM) and neural network (NN) and also electric field and magnetic field values are predicted using NN for increase in tower height. The result shows the performance of proposed method for prediction of electric field and magnetic field for increase in tower height.

Keywords: climbing routes, support vector machines, neural network, hybrid data mining approach
System Approach for Strategic Planning in Transport

System Approach for Strategic Planning in Transport

Authors: B Gaál
Year: 2017, Volume: 10, Number: 1
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Abstract

The paper gives an overview on the current status of the connection between city and transport. After a short theoretical introduction on the effect of different city development strategies it shows the importance of transport in the life of a settlement. Through international best practice, there are some good examples on the holistic planning of a city.

Keywords: transport system planning, urban planning, mobility management
Problems Caused by Thermal Bridges around Windows of Historic Buildings and Renovation Methods

Problems Caused by Thermal Bridges around Windows of Historic Buildings and Renovation Methods

Authors: C Tömböly
Year: 2017, Volume: 10, Number: 1
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Abstract

Preserving the old forms and structural details in case of renovation of buildings is a primary issue. The structure of traditional wooden windows, as eyes of the building, defines the character of the facade, the street view and also influences the character of the whole townscape. With the new building energy regulations energy awareness became conspicuous, which is current requirement during the energy crisis of the XXI. century at national and international levels as well. This paper investigates all the renovation or replacement methods of historic windows should be considered.

Keywords: energy-conscious design, historic windows, thermal performance, thermal insulation capability of windows, renovation
Comparison of Annual Prediction Methods for Spring Flow in the Aggtelek Region

Comparison of Annual Prediction Methods for Spring Flow in the Aggtelek Region

Authors: K Mátyás
Year: 2017, Volume: 10, Number: 1
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Abstract

Karst spring flow plays an increasing important role in groundwater resources in Hungary. This paper evaluates three different estimation methods to predict mean annual spring flows in the Aggtelek region, using GIS based catchment area. Annual spring flow was predicted by two regional regression equations, by applying the Budyko equations, and by the original and modified Maucha method. Using measured spring flows, precipitation and temperature data between 1975-1992 each method was evaluated and compared for 12 spring location in the Aggtelek region. Neither method was found significantly better than the others. The Budyko curves gave a good estimation for annual spring flows, with average variance. The non-linear regression method gave the best result, with the smallest median error, and error variance.

Keywords: Aggtelek, Karst, Hydrology Statistics
Multi-Partite Structure of Demand-Supply Network Element

Multi-Partite Structure of Demand-Supply Network Element

Authors: I Fekete, G Kallós, T Hartványi
Year: 2016, Volume: 9, Number: 3
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Abstract

In our recent article we investigate the utilization possibilities of usual time related, demand and supply data sets of an organization. We also create some others from those time related data sets, thanks to what we have the full set of links’ and nodes’ data for further analyses. We also evaluate some usual network analytical approaches to determine the characteristic structure of demand-supply network element (i.e. organization), the relevant network topology and sensitive to failure network skeleton.

Keywords: supply chain, multipartite networked structures, demand-supply data, matrix analysis
Framework for the Packaging Supply Chain of an Automotive Engine Company

Framework for the Packaging Supply Chain of an Automotive Engine Company

Authors: K Vöröskői, P Böröcz
Year: 2016, Volume: 9, Number: 3
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Abstract

Automotive industrial groups consider the impacts of packaging very important, mainly focusing on the cost effectiveness and environmentally conscious nature thereof. In the literature, the packaging supply chain is not a significantly researched area as regards the supply of the complete automotive engines. But the selection of packaging and the relevant development process in engine production are among the main elements of the extensive automotive industry, because participants sometimes have the same interests and considerations. This way, decision-making and strategies on using different packaging solutions and systems can be very varied. The reason is that each automotive group practically produces its own engines and transports them to their assembling subsidiaries all over the world. These groups often apply similar logistics policies and supply systems to use, take-back and recover their packaging. This is being driven as much by group strategies as it is by the need to reduce costs and increase efficiency in supply chains. The focus of this paper will be on the components and elements of packaging supply chain management in the field of engine supply for automotive industry groups, and on how the decision-making framework is determined. This paper shows models defining the network process for decision-making within the automotive groups as regards the packaging supply chain.

Keywords: automotive, packaging, supply chain management, packaging supply chain (PSC)
A Simple Case of Pallet Setup Features Based Order Picking Routing Optimization

A Simple Case of Pallet Setup Features Based Order Picking Routing Optimization

Authors: T Bódis, J Botzheim, P Földesi
Year: 2016, Volume: 9, Number: 3
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Abstract

Order picking is the most labour-intensive and costly activities in many warehouses by consuming ca. 55 % of the total operating expenses. Order picking development strategies mostly concentrate on warehouse layout, storage assignment policy, routing, zoning and on batching methods. The main challenges of order picking process improvements are the synchronization of these fields and fit the system with the further influencing factors, like unique demands and product parameters. Researchers of the pallet-loading problem could provide a wider horizon on considerable parameters, but their results are rarely implemented into order picking processes. The physical parameters of the products also have a significant impact on the processes which could strongly influence the picking sequence. \\The aim of this paper is to describe our own developed methodology for modeling the pallet setup rules. We introduce our product classifying and PSF based decision matrix modeling solutions. These will be the basis of our further research on PSF based harmonized routing and SLA optimization. We examine the complexity of a simple pallet setup features based order picking routing case, where the products of the defined pallet setup classes stored in separated zones.

Keywords: order picking, pallet loading, routing, complexity
Enhancing Traffic Safety with Mobile Applications

Enhancing Traffic Safety with Mobile Applications

Authors: H Kaartinen, J Jämsä
Year: 2016, Volume: 9, Number: 3
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Abstract

Intelligent Transportation Systems (ITS) have great potential and market on modern traffic environment. Technologies of the day enable the real-time data transfer and presentation for the actors in traffic and outside of it. Inter-cognitive communication is a form of communication where an information system gathers data and processes it to a form of which users can benefit on their decision making. In this paper we will present how deploying new cognitive elements on mobile applications can increase traffic safety. The most important point of view in sharing the traffic data is how to present it for the driver and how to make the data transfer reliable and safe. New vehicles have built-in solutions, such as comprehensive infotainment systems, to present the information and warnings, but older vehicles do not have this option. Therefore the modern devices, such as smartphones and tablet computers can be utilized for these purposes. This paper describes Centria’s research work on developing mobile applications for improving the traffic flow and safety by real-time support for the driver’s decision making. Also, the data security has been studied and tested at Centria, and will be reported in this paper.

Keywords: 4G/LTE, 802.11p, AES-128, ITS, V2I, adaptive user interface, authentication, vehicular communication, situation awareness, encryption
Assessing the Need for Applying Multimodal Speed Distribution in Road Transport Macro Emission Estimation

Assessing the Need for Applying Multimodal Speed Distribution in Road Transport Macro Emission Estimation

Authors: A. Török, M. Zefreh
Year: 2016, Volume: 9, Number: 2
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Abstract

Vehicles speed distribution is an important input parameter in lots of issues, such as kinematical traffic simulation model, road design, speed limit evaluation, road traffic noise prediction or vehicles emission estimation. In this paper, a new approach has been presented in which the speed is randomly generated according to different speed distributions. Later on, these distributions were used as the basis of emission estimation. These different distributions were chosen according to the contextual traffic situation (free flow, pulsed accelerated flow, intersection, congestion, etc.) and were assigned to the fundamental diagram. The study of the effect of different speed distributions on the resulting emission level has been performed. The considerable difference in the emission models related to Log-normal distribution as well as exponential, chi-square and equal distribution to normal Gaussian distribution implies that these different traffic conditions will have a considerable effect on emission and will show the need for applying multimodal speed distribution in macro emission estimation rather than unimodal distribution. It should also be mentioned that this result may lead to the chance of revising the simulation software in further studies

Keywords: speed distribution, emission models, fundamental diagram
Analysing the Speed-flow Relationship in Urban Road Traffic

Analysing the Speed-flow Relationship in Urban Road Traffic

Authors: M. Juhász, Cs Koren, T Mátrai
Year: 2016, Volume: 9, Number: 2
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Abstract

In road traffic, speed-flow curves describe the relationship between vehicle flow rates and average vehicle speeds. These functions are one of the basic elements of transport modelling and they are widely used in project appraisal. Review and re-validation of speed-flow relationship has become timely in recent years as vehicle fleet changed, average traffic volumes increased and more comprehensive, automatic data collection became available. This study used the database of the road operator in Budapest to simultaneously analyse travel times and traffic volumes. The paper aims to examine the validity of the well-known fundamental diagram for urban roads, to provide an estimation for the speed-flow curve based on the Budapest case and to assess the on-set process of congestion.

Keywords: speed-flow relationship, transport modelling, urban road transport, congestion
The Humanistic Approach of Adult and Tertiary Education

The Humanistic Approach of Adult and Tertiary Education

Authors: A Mészáros, E Baróti
Year: 2016, Volume: 9, Number: 2
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Abstract

The environment of the 21st century adult and tertiary education has changed at several places. The obstacles of information flow have disappeared and the educational environment has been virtualized. At the same time, the learning habits of students have also changed radically. These changes should be followed by teriary and adult education as well. By accepting these phenomena workers of tertiary and adult education have to face a lot of fresh challenges. It is very important for them to adjust to the trends mentioned above Even those people who are not certified teachers need information, pedagogical and psychological knowledge to be able to find their way in the pedagogy of adult and tertiary education.

Keywords: tertiary education, the thinking barrier, the feeling barrier
Indoor Positioning Capabilities of Cognitive Entities

Indoor Positioning Capabilities of Cognitive Entities

Authors: L. Kajdocsi
Year: 2016, Volume: 9, Number: 2
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Abstract

Indoor Positioning is one of the most significant challenges of the 21st century. Hence, this paper aims to give an overview on indoor navigation solutions and propose a novel methodology which is based on Bluetooth technology. First of all, it presents radio based techniques. Secondly, other techniques based on the use of various sensors and measurements are described. Nowadays, we can state that each technique requires any type of smart device such as smartphone or tablet, whose inertial sensors help in evaluation of pedestrians’ actual position. Moreover, it would be assumed that every person has its own smart device, hence, we would also state that they could be considered as one entity. Therefore, the researches on indoor navigation systems require novel low-cost approaches that involve new generation devices, thus create future networks.

Keywords: indoor positioning, indoor navigation system, indoor localization, smartphone

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