Engineering

FPGA Based Single Chip Solution with 1-Wire Protocol for the Design of Smart Sensor Nodes
Applications that involve monitoring of water qualityparameters require measuring devices to be placed at differentgeographical locations but are controlled centrally at a remotesite. The measuring devices in such applications need to be small,consume low power, and must be capable of local processing tasksfacilitating the mobility to span the measuring area in a vast geographicarea. This paper...


Wrong-way driving crashes on French divided roads
The objective of divided roads is to increase users safety by posting unidirectional traffic flows. It happens however that drivers proceed in the wrong direction, endangering themselves as well as other users. The crashes caused by wrong-way drivers are generally spotlighted by the media and call for public intervention. This paper proposes a characterization of wrong-way driving crashes occur...
The relationship between the travelling speed and motorcycle styles in urban settings: A case study in Belgrade
This report examines the difference in the distribution of the speeds of different motorcycle styles and the difference in the distribution of speeds of particular motorcycle styles and cars. The relationship between the speed of motorcycles that possess and those that do not possess vehicle registration plates was also explored. The speed was measured at six different locations on main roads i...


Nothing good ever happens after midnight: Observed exposure and alcohol use during weekend nights among young male drivers carrying passengers in a late licensing country
Similar to other countries, also in the Netherlands young male drivers (ages between 18 and 24 years) are overrepresented in crashes during weekend nights, thereby fatally injuring one or more of their passengers. This overrepresentation may be due to two contributing factors: (a) a higher exposure-to-risk because of dangerous trip condition, and (b) a higher tendency to take risks. Studies on ...
Visual enhancement of 3D images of rock faces for fracture mapping
As an alternative to simple decimation and 2.5D Delaunay triangulation, this paper introduces methodologies known as epsilon-nets and Poisson surface reconstruction to reduce the size of large point clouds of geological scenes and generate a mesh. Epsilon-nets produce decimated point clouds free from undesirable organized patterns linked to data acquisition. Through the ε parameter, the user s...


An improved equivalent viscoelastic medium method for wave propagation across layered rock masses
The behavior of waves propagating through a rock mass is complicated by the discontinuous nature posed by the joints in the rock mass. However, at large scale, the jointed rock mass can be treated as an equivalent continuous medium. The purpose of this paper is to establish a method to determine the equivalent viscoelastic property of rock masses with different seismic quality factors, and to a...
Comparison between plate jacking and large flat jack test results of rock mass deformation modulus
The results of two types of loading tests for the determination of the in situ rock mass deformation modulus (E m ), namely, large flat jack (LFJ) and plate jacking tests (PJT), which were carried out side by side during the exploratory phase of the Karun 3 hydro-electric project in Iran, have been compared, correlated and analysed. The comparison includes sixteen PJTs and twelve LFJ tests. PJ...

Effect of slip-weakening distance on selected seismic source parameters of mining-induced fault-slip
Fault-slip caused by mining activities in underground mines could cause severe damage to nearby mine openings due to seismic waves arising from the fault-slip. A better understanding of seismic source parameters, such as seismically radiated energy and the maximum slip rate, is of pivotal importance in estimating the damage induced by the fault-slip. It is widely recognized that dynamic behavio...
Modified criteria for sliding and non-sliding failure of anisotropic jointed rocks
Modified failure criteria are proposed to estimate sliding and non-sliding strength of anisotropic rocks containing single or a set of parallel well-defined discontinuities. A newly modified form of Mohr–Coulomb relation is incorporated into two well-founded failure criteria namely Jaeger’s criterion and Tien–Kuo criterion. Some input parameters of the proposed criteria may be indirectly ...

Finite element analysis of the hydro-mechanical behavior of an underground crude oil storage facility in granite subject to cyclic loading during operation
The hydro-mechanical behavior of an underground crude oil storage facility in granite that will be subject to cyclic loading during its operation was analyzed using the finite element method. A series of laboratory tests were performed to examine the fatigue behavior of granite when subjected to cyclic loading under triaxial compression conditions. The tests indicate that the stress correspondi...
An implicitly coupled hydro-geomechanical model for hydraulic fracture simulation with the discontinuous deformation analysis
In this article we present and verify an algorithm for modeling hydraulic fracturing in complex fracture geometries. The method is built upon an existing model which uses the discontinuous deformation analysis for simulation of rock mechanics and upon a finite volume fracture network model for simulation of compressible fluid flow in fractures. Improvements are made to the fluid, contact and co...

Development of a damage simulator for the probabilistic assessment of building vulnerability in subsidence areas
The extraction of ore and minerals by underground mining often causes ground subsidence phenomena and may result in severe damage to buildings. Risk analysis in subsidence regions requires the assessment of both the hazards to and vulnerability of nearby buildings. However, many uncertainties exist and this assessment and its representation as well are still a complex objective. For this purpos...
Characterization of jointed rock masses for geotechnical classifications utilized in mine shaft stability analyses
In the Divriği open-pit iron mine in Turkey, extracted ore is initially crushed in an underground chamber. This chamber was previously located 54m below the bottom level of the mine, which was linked by a vertical shaft. Because of the progression in the mine operations, the mine management decided to shift the chamber to a depth of 264.15m below the surface. A borehole called as YNK-3, which ...
Mobile device for the measurement of threshold perception frequency of the flickering source of visible light
The article describes design solutions and test results of a mobile device for the measurement of threshold perception frequency of the flickering source of visible light. The device consists of an optical component, a programmable module and a control module. The measurement can be performed on the light source of any color in conjunction with a colored backlight. The authors of the research w...
Neighborhood effects in a behavioral randomized controlled trial
Randomized controlled trials (RCTs) of interventions intended to modify health behaviors may be influenced by neighborhood effects which can impede unbiased estimation of intervention effects. Examining a RCT designed to increase colorectal cancer (CRC) screening (N=5628), we found statistically significant neighborhood effects: average CRC test use among neighboring study participants was sign...