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# Sight distance analyses for autonomous vehicles in Civil 3D

Pollack Periodica
Authors: Khalil Khaska and Dániel Miletics

## Abstract

Nowadays, self-driving cars have a wide reputation among people that is constantly increasing, many manufacturers are developing their own autonomous vehicles. These vehicles are equipped with various sensors that are placed at several points in the car. These sensors provide information to control the vehicle (partially or completely, depending on the automation level). Sight distances on roads are defined according to various traffic situations (stopping, overtaking, crossing, etc.). Safety reasons require these sight distances, which are calculated from human factors (e.g., reaction time), vehicle characteristics (e.g., eye position, brakes), road surface properties, and other factors. Autodesk Civil 3D is a widely used tool in the field of road design, the software however was developed based on the characteristics of the human drivers and conventional vehicles.

Open access

# Assessment of reinforced concrete slab of historical structures by the yield-line method

Pollack Periodica
Authors: Rayan Mahrouseh and Zoltán Orbán

## Abstract

The study demonstrates and evaluates an approach in the structural analysis phase when assessing reinforced concrete slabs.

Due to different values of a parameter in the tests’ results, 10 models was crated for the first case study and 4 models for the second one.

In order to compare the results in terms of the flexural bearing capacity, the slabs were analyzed by using elastic finite element analysis and yield-line analysis.

Comparing the results shows that minor modification in the parameters associated with bearing capacity and the boundary conditions can affect the adequacy factor considerably, while the parameters those relate to boundary conditions affect the distribution of the yield lines.

Open access

# Characterization of walking gait features using Kinect

Pollack Periodica
Authors: Peter Müller and Ádam Schiffer

## Abstract

The examination of the human gait cycle can be useful for physiotherapists for identifying and/or predicting body motion disorders and it provides important data about the patient's condition in many ways. In this paper, the progress of a special TheraSuit physiotherapy treatment of a child, who has reduced mobility due to cerebral palsy, has been investigated. Generally, this type of disorder is classified into strict levels and the effectiveness of the therapy is expressed by changing between distinct levels. On the other hand paper describes a new markerless self-developed movement analysis system, which is able to show the effectiveness of the treatment with quantitative parameters. These parameters are determined by statistical methods.

Open access

# Intervention and renewal − Interpretation of installation art in urban public space

Pollack Periodica
Authors: Honghao He, Mengyang Wu, and Janos Gyergyak

## Abstract

The manifestation of installation art is becoming more and more diversified and closer to the people in the urban public space. It forms an interactive environment with the urban space. This article discusses the relationship between installation art and urban renewal from the perspective of art intervention in urban public spaces. Through the observation, investigation and case analysis of installation art in the city, above all, it summarizes the development context of installation art, then elaborates the intervention strategies and characteristics of installation art in urban public space, analyzes the role of installation art in urban public space, and finally summarizes the value of installation art to urban renewal.

Open access

# Investigation on strength properties of polymer modified concrete using glycoluril

International Review of Applied Sciences and Engineering
Authors: SKM. Pothinathan, M. Muthukannan, N. Selvapalam, and S. Christopher Gnanaraj

## Abstract

In this study, an endeavor is made to discuss mainly the mechanism, use, and application of polymer modified concrete which is increasing in general fame due to its simplicity, ease of handling, proficiency, and agreeable outcomes. This work explores the impact of adding a new polymer named glycoluril on the mechanical property through the estimation of compression, tension, and flexural strength. Physical properties such as density, sorptivity, and acid resistance were studied to establish the durability of concrete. This examination additionally ponders the impact of polymer in concrete and polymer dosage. Series of concrete mix with 0%, 1%, 2%, 3%, and 4% glycoluril by the mass of binder were prepared, cured, and tested in 7 days and 28 days. Results indicate that there is no adjustment in the workability aspect, however, the improvement of strength factor in compression, tension, and flexure is recorded when compared with the conventional concrete. The experimental results show that by increasing the proportion of glycoluril, the strength of concrete increased up to 3% in addition. In the meantime, the 3% addition provided a higher outcome than the other blend. Further expanding the polymer content marginally decreased the strength. The outcome affirms that the utilization of new polymer in concrete will increase the desired property.

Open access

# A lightweight shelter for the survivors after 2016 earthquake in Accumoli

Pollack Periodica
Authors: Asma Gueroui, Miklos Halada, and Ehsan Fatehifar

## Abstract

On August 24th, 2016, the town of Accumoli has suffered from a strong earthquake of 6.2 magnitudes, which caused a life loss, destroyed buildings, and huge numbers of homeless people. Now, four years after the earthquake, the village has not yet been reconstructed, no long-term housing has been provided for the inhabitants, and even the rubble of the destroyed houses has not been removed from the site. The significance of this paper is to provide some design scenarios for shelters using wood and membrane as construction materials, in order to provide housing in Accumoli for the existing population in a new site next to the destroyed one. These proposed design projects are part of the consortium of the “Scuola di Ricostruzione di Accumoli”.

Open access

# Reconstruction place script to awake the general public’s memories

Pollack Periodica
Authors: Chao Ren and Gabriella Medvegy

## Abstract

At present, many great Chinese cities are undergoing changes in urban development models, from focusing on speed construction to quality construction. People pay more attention to the improvement of construction quality, from the perspectives of culture, spirit, urban image and function optimization.

The creation of place scripts is an important method of modern urban space, and in specific place to design, deepen, and arrange certain procedures and content, so that people can experience different feelings, learn more stories, or cultivates sentiment through various experiences, inherit diverse memories. This paper is based on design projects to analyze research and build place scripts to summarize the expressions that shape memory.

Open access

# Assessment of RANS turbulence closure models for predicting airflow in neutral ABL over hilly terrain

International Review of Applied Sciences and Engineering
Authors: Amahjour Narjisse and Khamlichi Abdellatif

## Abstract

Implementing wind farms in heights of a hilly terrain where wind speed is expected to be large may be viewed as a means to increase wind energy production without occupying fertile lands. Micro sitting of a wind farm in these conditions can gain dramatically from CFD simulation of fluid flow in the ABL above complex topography. However, this issue still poses tough challenges regarding the turbulence model to be used and the way to operate the near wall treatment in the presence eventually of separation. In this work, prediction capacity of RANS turbulence models was studied for a typical hill under the assumption of steady state and incompressible airflow regime in neutral ABL. Two models were analyzed by using COMSOL Multiphysics software packages. These included standard $k−ϵ$, and shear-stress transport $k−ω$. The most up-to-date procedures dedicated to near wall treatment were applied along with refined closer coefficients adjusted for the particular case of ABL. Considering wind tunnel test data, performance of the previous models was discussed in terms of converging mesh, computational time, reattachment point position and propensity of the model to retrieve the right level of turbulence flow in conditions of neutral stratifications. Then, a numerical simulation of the turbulent airflow over two slopes shapes of the symmetry hill by the validation of the experimental data has been then carried out. Both turbulence models agree well with air-velocity tested windward of the hills H3 and H5. Therefore, it was found that the standard $k−ϵ$ model performs very well at the different positions of the low slope hill, and at the summit of a steep hill, but it over-predicts wind speed close to the wall, which requires an improvement of the near-wall treatment. However, the $SSTk−ω$ model in neutral case of the ABL was given consistent simulation results with experimental data for prediction of the flow separation and recirculation region at the leeward side of a steep hill, whereas standard $k−ϵ$ model under the neutral condition and the $SSTk−ω$ model by using standard coefficients were failed to predict accurately detailed characteristics of recirculation region process.

Open access

# Developing railway supplier selection excellence using business intelligence knowledge management framework

International Review of Applied Sciences and Engineering
Authors: Mailasan Jayakrishnan, Abdul Karim Mohamad, and Mokhtar Mohd Yusof

## Abstract

In a broad scope, the term Information System (IS) is a scientific field of research study that approaches the scope of managerial, strategic, and operational activities complex in the storing, processing, distributing, gathering, and utilizing of knowledge and its associated technologies in organizations and industry. The model of railway supplier selection using BI-KM framework is situated on a horizontal structure of the organization and its technology transformation to execute the organization goal, with technology as enabler and driver (technology adoption), organization as the principal environment (business process analysis), and Information Management (data modeling). This study is significant in supporting data scenarios by focusing on the heuristic view of an industry approach to problem-solving management issues. Furthermore, the research development was to identify integrated framework adoption that contributes to strategic performance diagnostics dashboard. By understanding the factors of theoretical framework adoption, these conceptual frameworks assure competitive advantage. Besides, this railway supplier selection excellence model analyzed the extent and provides a potential solution to strategic decision-making issues. The study directs to regulate the adoption of the theoretical framework towards conceptual framework by using the role of Business Intelligence (BI) to analyze the quality of data presented as the railway supplier selection criteria from operational management through data analytics. Moreover, this will be united to help the best cycles and instruments in essential execution by the executives of a railway supplier selection dashboard for simulating data as interactive supplier performance.

Open access

# Characterization of the biodegradation of synthetic and organic wastewater in an anaerobic tank reactor using microalgae

International Review of Applied Sciences and Engineering
Authors: Tamás Magyar, Felipe Werle Vogel, Florence Tóth, Attila Nagy, János Tamás, and Péter Tamás Nagy

## Abstract

The anaerobic digestion is a well-known method in waste management of biodegradable wastes to transform waste to energy. Proper digestion requires optimal fermentation conditions to improve the quality and yield of biogas.

The objective of this study was to characterize the biodegradation process of synthetic and organic wastewater. Microalgae (Chlorella vulgaris) were utilized as a bioindicator for anaerobic digestion and monitoring of the fermentation process. Besides bioindication, the viability of the microalgae and the chlorophyll concentration were also assessed in such fermentation processes, since microalgae can be a potential source for biofuel production and a plant nutrient.

The biodegradation process was studied for a month in an anaerobic tank reactor. The fermentation processes and lengths of the fermentation stages were successfully monitored and separately identified based on the pH and gas development. Furthermore, the amount and dynamics of the biogas yield also revealed that the fermentation process was about 510 hours in both cases. In contrast, increased temperature in thermophilic range (45°C) accelerates the degradation processes and resulted in shorter hydrolysis (60 hours), acetogenesis (24 hours) and longer methanogenesis (81 hours) stages, where higher biogas yield was also achieved (59.3%). During the process, the concentration of nutrients showed logarithmical tendencies and COD showed power tendency in time. The extent and the direction of the changes were in correspondence with microalgae activity. In thermophilic circumstances, living microalgae biomass dropped significantly without recovery therefore such an environment is not a viable option for microalgae growth. Moreover, dead microalgae biomass seems to act as a substrate for fermentation slightly increasing the concentration of some nutrients in the wastewater.

Open access