Solving cross-matching puzzles using intelligent genetic algorithms

Cross-matching puzzles are logic based games being played with numbers, letters or symbols that present combinational problems. A cross-matching puzzle consists of three tables: solution table, detection table, and control table. The puzzle can be solved by superposing the detection and control tables. For the solution of the cross-matching puzzle, a depth first search method can be used, but by expanding the size of the puzzle, computing time can be increased. Hence, the genetic algorithm, which is one of the most common optimization algorithms, was used to solve cross-matching puzzles. The multi-layer genetic algorithm was improved for the solution of cross-matching puzzles, but the results of the multi-layer genetic algorithm were not good enough because of the expanding size of the puzzle. Therefore, in this study, the genetic algorithm was improved in an intelligent way due to the structure of the puzzle. The obtained results showed that an intelligent genetic algorithm can be used to solve cross-matching puzzles.     

Arrangement of high-energy neutron irradiation field and shielding experiment using 4 m concrete at KENS

An irradiation field of high-energy neutrons produced in the forward direction from a thick tungsten target bombarded by 500 MeV protons was arranged at the KENS spallation neutron source facility. In this facility, shielding experiment was performed with an ordinary concrete shield of 4 m thickness assembled in the irradiation room, 2.5 m downstream from the target centre. Activation detectors of bismuth, aluminium, indium and gold were inserted into eight slots inside the shield and attenuations of neutron reaction rates were obtained by measurements of gamma-rays from the activation detectors. A MARS14 Monte Carlo simulation was also performed down to thermal energy, and comparisons between the calculations and measurements show agreements within a factor of 3. This neutron field is useful for studies of shielding, activation and radiation damage of materials for high-energy neutrons, and experimental data are useful to check the accuracies of the transmission and activation calculation codes.     

A tour of secure software engineering solutions for connected vehicles

The growing number of vehicles daily moving on roads increases the need of protecting the safety and security of passengers, pedestrians, and vehicles themselves. This need is intensified when considering the pervasive introduction of Information and Communication Technologies (ICT) systems into modern vehicles, because this makes such vehicles potentially vulnerable from the point of view of security. The convergence of safety and security requirements is one of the main outstanding research challenges in software-intensive systems. This work reviews existing methodologies and solutions addressing security issues in the automotive domain with a focus on the integration between safety and security aspects. In particular, we identify the main security issues with vehicular communication technologies and existing gaps between state-of-the-art methodologies and their implementation in the real world. Starting from a literature survey and referring to widely accepted standards of the domain, such as AUTOSAR and ISO 26262, we discuss research challenges and set baselines for a holistic secure-by-design approach targeting safety and security aspects all along the different phases of the development process of automotive software.     

XACMET: XACML Testing & Modeling

Software Quality Journal - In the context of access control systems, testing activity is among the most adopted means to assure that sensible information or resources are correctly accessed. In...     

Cracking and fracture of matrix structure and carbide particles produced by the grinding process

WA, CBN and diamond grinding wheels have been used in an experimental investigation of surface integrity of ground steel. The importance of grinding force, temperature, and grit sharpness is emphasised     

A numerical simulation study for the human passive thermal system

The objective of this study is to create a dynamic model representing a transient three-dimensional passive thermal model of the human body. The model is a multi-segmental, multi-layered representation of the human body with spatial subdivisions which simulates the heat transfer phenomena within the body and at its surface. In order to represent the mechanisms of heat transfer within the body, energy balance equations including conduction with adjacent tissue, heat storage, metabolic heat generation, and convective heat transfer due to the blood flow in the capillaries are taken into consideration for each tissue. The present model of the passive system accounts for the geometric and anatomic characteristics of the human body and considers the thermo-physical and the basal physiological properties of tissue materials. It is assumed that the body is exposed to combination of the convection, evaporation and radiation which are taken into account as boundary conditions when solving the passive thermal system equation. The model is capable of predicting human body temperature in any given environmental conditions. Finite difference solution scheme is used to find out the temperature distribution of human body. The results are compared with the experimental data of previous studies present in the literature. Consequently, the numerical results of present model show good agreement with the experimental data.     

Utilization potential lignocellulosic waste biomass to produce carbon support by using new activation reagent (H3BO3 and SrCl2): structural and adsorptive properties

ABSTRACT

Activated carbons series were produced from the orange peel by chemical activation using strontium chloride (SrCl₂) and boric acid (H₃BO₃). The activation temperature effects and type of activation reagents on the surface and chemical properties of activated carbon have been investigated. The surface area of the activated carbons is 577 and 290 m² g^?1 for H₃BO₃ and SrCl₂ activation_, respectively. An increase in the temperature for both H₃BO₃ and SrCl₂ led to a decrease in the yields of the activated carbons. The yield of H₃BO₃ series is higher than the yield of SrCl₂. The obtained activated carbons were heteroporous with the mesopore. Orange peel can be used alternative waste biomass for the mesoporous activated carbon productions. Samples were characterized by XRD, SEM, FTIR, and TGA analysis.     

Gentamicin loaded β‐tricalcium phosphate/gelatin composite microspheres as biodegradable bone fillers

In this study, novel composite bone fillers with microspherical shape, biodegradable property, and antibacterial effect were designed and prepared. Various fillers with different β‐tricalcium phosphate (β‐TCP)/gelatin (G)/glutaraldeyde (GA) compositions were loaded with a model antibiotic, gentamicin. The effect of composition and preparation conditions on the release of gentamicin was investigated in in vitro conditions. Complete release were observed in 12 h for pure β‐TCP powder, and this period was extended up to 96 h as the gelatin content increased in the microspheres. Morphological and chemical structures of the microspheres, before and after the release studies, were investigated by scanning electron microscopy and Fourier transform infrared, respectively. Antibacterial activities were examined against Escherichia coli by using disc diffusion method and promising results were obtained. It is proposed that these novel β‐TCP/G/GA microspheres can be applied locally to prevent and/or eliminate infection that might occur around a defected region of hard tissue and supports the healing process. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers