Engineering

Bearing Capacity of Rectangular Footing on Sandy Soil Bounded by a Wall
The present study investigated the behavior of model footings bounded by a wall of different depths and located at different distances from the footing resting on sandy soil. Different parameters are considered, such as relative density of sand, distance from the wall to the edge of footing (d), width of footing (B) and depth of wall (h). Test results show that the presence of the wall affects ...


An Efficient Convex Hull Algorithm Using Affine Transformation in Planar Point Set
When trying to find the convex hull (CH) of a point set, humans can neglect most non-vertex points by an initial estimation of the boundary of the point set easily. The proposed CH algorithm imitates this characteristic of visual attention, starts by constructing an initial convex polygon (ICP), and measures the width and length of ICP through a shape estimation step. It then maps the point set...
Latent Fingerprints Segmentation: Feasibility of Using Clustering-Based Automated Approach
Latent fingerprints are the impressions of ridges left on a crime scene due to unintentional touching of criminal’s fingers on different objects. These impressions of ridges have been used as vital evidences for identifying the criminals by law enforcement agencies. In this study, an attempt for automated segmentation of latent fingerprint has been made using K-means clustering. In proposed a...


Advantages of Applying a Steam Curing Cycle for the Production of Kaolinite-Based Geopolymers
In this study, a new approach, which involves the application of a steam curing cycle for the production of kaolinite-based geopolymers, is investigated. This approach aimed to accelerate geopolymeric reactions and eliminate the content of residual alkalis within the geopolymer mass and the formation of efflorescence at the surface of the specimens, thus increasing their mechanical strength. Th...
A New Correlation to Predict Dew Point Pressure in Wet Gas Reservoirs
Correlations and equation of state (EOS) are two important tools for dew point pressure calculation. Several correlations introduced for gas condensate reservoirs, these correlations have limited range of use, and they could not be applied for wet gas reservoirs. Although EOS is more general, but sometimes dew point pressure could not be calculated from EOS (i.e., when limited range of componen...


Potential Environmental Values of Waste-to-Energy Facilities in Saudi Arabia
Toward diversifying the sources of electricity and ensuring the sustainability of power generation, the Kingdom of Saudi Arabia (KSA) is proposing an impressive plan for renewable energy utilization including waste-to-energy (WTE) facilities. The environmental values of WTE facilities in KSA have never been investigated. This research forecasted the potential environmental values of WTE facilit...
VLSI Implementation of Area-Efficient Truncated Modified Booth Multiplier for Signal Processing Applications
In this paper, hardware efficient truncated multiplier using modified booth algorithm is proposed for signed bit multiplication, such that the average absolute error is kept minimum. The proposed methodology truncates the least significant bits (LSBs) of the final product and thus minimizes the number of full adders and half adders used in partial product accumulation. This we achieve by non-ge...

Sonophotocatalytic Degradation Studies of Alizarin Reactive Red Dye
The photocatalytic oxidative degradation and discoloration of the reactive dye was investigated. Along with photochemical oxidation process, the sonochemical effect was also used. Experiments were performed in slurry mode in both UV and solar light at optimized conditions. Degradation observed was 88% under photocatalytic optimized conditions, i.e., pH 4.8, TiO2 = 0.3 g L−1 and oxidant dose...
Effect of Void Area on Hollow Cement Masonry Mechanical Performance
Originally, brick/block was formed by placing moist clay/cement mortar in a mold by hand. As modern industrial methods were implemented in the cement block manufacturing process, the majority of production was changed from a molded process to an extrusion process. Extrusion more easily accommodates the inclusion of hollow (void area) in a block unit, which in turn can make the manufacture and u...

Laboratory Study on Shear Strength of Loess Joint
The internal friction angle of loess joint is measured by means of direct shear test. The results show that the relationship between internal friction angle and moisture content is revealed to be a parabola one. The internal friction angle has an extremum when the moisture content reaches a certain value. This moisture content is called the limit moisture content. The internal friction angle is...
Simulation of a shock absorber with vertical buckling tubes welded in the longitudinal direction
The Ignalina Nuclear Power Plant (NPP) has two RBMK-1500 graphite moderate boiling water multi-channel reactors. The Ignalina NPP Unit 1 was shutdown at the end of 2004 while Unit 2 was shut down at the end of 2009. The spent fuel assemblies are located in the pools of Ignalina NPP Units. These spent fuel assemblies will be loaded to the special casks for the storage of spent fuel assemblies. T...

Premature Failure of Tubing Joint used in a Crude Oil Production Well
A 30 feet long and 3.5 inch diameter joints tubing used in wet sweet Extra arab Light grade crude oil production well failed after 3 years of service. The bottom-hole temperature and pressure were, 82°C and 170 atm, respectively. The tubing had a nominal wall thickness of 6.45 mm and was located at starting depth of 1465 m. The average production rate and water cut of the oil well during the l...
An investigation of premature fatigue failures of gas turbine blade
A failure of a first stage compressor blade of a Gas Turbine Generator in a Gas Treatment plant caused severe mechanical damage to the compressor section and power supply troubles. In this paper, the blade failure is investigated by mechanical, metallography and chemical analysis. a finite element analysis is performed on the blade geometry to identify the stress concentration areas and the str...
Comparative pushover and limit analyses on seven masonry churches damaged by the 2012 Emilia-Romagna (Italy) seismic events: possibilities of non-linear Finite Elements compared with pre-assigned failure mechanisms
The most suitable way to perform a fast but reliable failure analysis of existing masonry churches in earthquake prone areas is investigated in order to predict the state of damage and eventually failure modes. Different failure analyses are systematically applied on a wide variety of different churches, that suffered damage during the recent 2012 Emilia-Romagna (Italy) earthquake sequence. The...
Risk propagation mechanism: Qingdao crude oil leaking and explosion case study
Due to China’s acceleration of urbanization expansion, more and more oil/natural gas transmission pipelines, which were originally laid in the urban outskirts, are now in the densely populated urban areas. Therefore, the urban pipeline network security risks in its operation phase are more and more common. And more and more problems are caused. Using the disaster of “ Qingdao Crude Oil Leak...