Tikrit Journal of Engineering Sciences

At present the web applications are used for most of the life activities, these applications are affected by an attack called (Structure Query Language Injection Attack) SQLIA due to the vulnerabilities of the web application. The vulnerabilities of the web application are increased because most of application developers do not care to security in designing.SQL injection is a common attack that infects a web application. The attacker adds (Structured Query Language) SQL code to web page for accessing and changing victim databases.The vital step in securing the database and detecting such an attack in web apps is preparing a tool. Many researchers propose different ways for detection and prevention of such as an attack. In this paper a tool it proposed using a powerful micro-framework web application designer called Flask in Python 3.7 to detect and prevent such attacks. The proposed system is called SQLIAD. SQLIAD analyzed a web application on-line.

The aim of this article is to compare Vibration and Noise measurements caused by different types of Machines at cement factories with the standard evaluation criteria of Vibration ISO 2631 – 4 EVS – EN 5349 – 2 and Noise following the standard ISO 9612 – 2009. Two cement companies were chosen, the first is located at Baddish district, 30km west of Mosul city (Iraq), which is called Baddish general cement company, while the other is located south of Mosul, and is called Hammam Al-Alil general cement company. Three stations were chosen for each company (raw materials grinding mills, cement grinding mills and exhaust fan stations) having different electrical motor capacities. Noise level meter and vibration level meter manufactured by B & K (DENEMARK) were used for measurement. The location of bearing were chosen for vibration measurement, while the location of the operator ears for noise measurement, where chosen. It was found that most of the readings in vibration levels were unacceptable according to the evaluation criterion of vibration magnitude and noise level higher than 85dBA due to rotating unbalance misalignment and faulty gear matching (ISO 1940/1, 1990).

Gypseous soils are problematic soils that cause large deformations in the constructions that are built on it. Therefore, many binders have been used to reduce this impact. Traditional soil binders like lime or cement have environmental problems in terms of sustainability. Thus, sustainable substances have attracted appreciable interest in recently soil enhancement. Biomaterials are being developed to enhance geotechnical engineering properties like hydraulic conductivity, strength, and slope stability of varied soil types. This study aims at evaluating the engineering characteristics of gypseous soil treated with xanthan gum biopolymer. The tests performed on three types of gypseous soil with various gypsum contents and different properties. Gypseous soils were mixed with various contents of xanthan gum with a percentage of 2, 4, and 6. The compaction results indicated that xanthan gum decreases the maximum dry density and increases the optimum moisture content. The treated gypseous soils exhibited a low collapse potential by more than 30% - 45% with xanthan gum. The direct shear results of biopolymer treated soils showed significant shear strength gains. The results of the current study imply xanthan gum biopolymer improvement as an environmentally friendly method to improve the engineering properties of gypseous soil.

In this paper, the effect of footing shape resting on dry sand when subjected to machine dynamic loading is experimentally investigated. A laboratory set-up was prepared to simulate the case at different operating frequencies. Nine models were tested to examine the effects of the combinations of two parameters, including different frequencies of (0.5, 1, and 2 Hz) and different footing shapes (circular, square and rectangular). The tests were conducted under a load amplitude of (0.25 ton) using sand with medium and dense relative densities corresponding to (R.D. = 50% and 80%) having unit weights of (17.04 and 17.96 kN/m3) respectively. A shaft encoder and a vibration meter were used to measure the strain and amplitude displacement, while the stress in the soil at different depths was measured using flexible pressure sensors. It was found that the shape of footing has a considerable influence on the bearing capacity of the supporting soil under dynamic loading. For instance, the strain of dry sand under a circular footing was nearly (41%) higher, the amplitude displacement was nearly (17%) higher, and stress was nearly (12%) higher than square and rectangular footings, under the same conditions.

In this paper, a new compact waveguide-fed flexible antenna is presented for RFID applications. This antenna is operated at the resonant frequency of 2.45 GHz. The proposed antenna is designed with small size on (43 × 30) mm2 epoxy substrate material type (FR4) used in the proposed antenna that has a dielectric thickness of 1.6 mm, the relative permittivity of 4.3 and tangent loss of 0.025 where the FR4 dielectric combines good electrical features, price, and availability. The return loss is less than −10 dB in the frequency interval (2.1 − 2.98) GHz. The maximum gain of the proposed antenna is 2.47 dB. The proposed antenna has a wide impedance bandwidth, and an omnidirectional radiation pattern with a small size has been achieved. The overall size of the compact antenna are (43 × 30 × 1.67) mm3. The Computer Simulation Technology (CST) microwave studio software is used for simulation.

IN modern buildings, transverse openings are often used in order to pass the pipes of health services, electrical cables or air conditioning ducts and other prepuce. The presence of these openings leads to a weakening of the beam so it must work to investigate the behavior of these beams in order to know how the presence of openings affects beam resistance. In this research, the behavior of reinforced concrete T-beams with circular openings exposed to pure torsional moment is studied. The experimental program involves testing of five beams with same dimensions and reinforcements. One of them is solid beam and used as reference for comparison with other beams with an opening and the other four T- beams containing circular openings of deferent dimension(100 and 150) and location(Lc/2 and Lc/3). Practical results show that the T-beam with circular openings of diameter (100mm) with different locations (Lc/2 and Lc/3), where Lc is the clear span of the beam, have an ultimate torsional capacity lower than that for solid beam by about (23% and 30%) respectively. The increase of the openings size causes a significant decrease in torsional capacity, where the beams with circular openings of diameter (150mm) with different locations (Lc/2 and Lc/3) have an ultimate torsional capacity lower than that for solid beam by about (56 % and 61%) respectively. Practical results show also that the presence of circular openings with diameter of 47% and 71% from the total depth increases the angle of twist significantly as compared with reference beam for the same applied torque level.

The present research focuses on studying the effect of architectural shape of reinforced concrete frames resulting from irregularity of geometrical shape of building frame. The reinforced concrete Frame, consisting of eight storey and three bays, was designed by the American Code ACI-14. SAP2000 (V.20) software was used for the purposes of design, analysis, of the structural response for behavior elasto-plastic under the effect of blast loading, through a number of variables, including the maximum displacement and plastic deformations at the tip of structure, number and status of plastic hinges formed, and damage index. The interaction diagram between axial force and bending moment was adopted as a yield surface to undergo the transition from elastic to plastic behavior for the columns, while the design yield moment was defined as a yield criterion for beams. The accumulated plasticity (Plastic hinge) at the ends of structural element was used to simulate the elasto-plastic behavior . Irregularity and unsymmetrical form of frame structure have a significant effect on increasing the deformations and plastic displacements in the elements more than 40% and increasing the damage index in structure more than 18%, that is calculated on the basis of dissipated energy by plastic deformations. The distance between centers of Mass (C.M.) and Stiffness (C.S.) significantly affects the response of structure, where the plastic deformations of structural elements are in the least damage zone in case of convergence between two centers, compared to other cases of heterogeneity irregularity of geometrical shape of structure that results in diverging of these centers.

Safety programs are a humanitarian message developed by government bodies to protect the human race from various accidents and injuries as well as protecting all property from machinery, equipment and various materials. Despite the interest of the countries of the world and especially the developed countries in the subject of occupational health and safety, this topic did not receive the attention required by the higher departments in most of our construction sites. This research aims to adopt criteria to determine the value of compensation of workers in the construction sector in Iraq as a result of work accidents. In this research several means were used to verify the value of compensation for workers in the construction sector in Iraq, such as using the questionnaire as a means of determining compensation criteria for injuries resulting from work accidents. The sample of the research was selected from engineers with experience in implementing construction projects and employees working in other specialties such as (judiciary, law and health), Where (31) persons who are directly related to the subject of the research. Some statistical methods (arithmetic mean, standard deviation, coefficient of variation, relative importance, truthfulness test, and stability) were carried out, through which the data were processed, and the results were interpreted accordingly. The value of financial compensation was extracted for the injuries suffered by workers as a result of work accidents (Working days) and according to criteria extracted based on the results of the questionnaire, in order to prepare stable standards of compensation that can be relied upon at any time and place, and for all construction projects in all Iraqi provinces. This research concludes that the lack of a clear system for compensating work injuries in construction projects and the adoption of compensation for personal and several considerations (regional and tribal) and others.

The computer control plays important role in the solar cell design and development of dual axis solar tracker for the sun's position. The main goal of this paper is to maximize energy output to reduce panel temperature (cooling), to increase efficiency of the PV panel. Small-scale solar is developed through a complete hardware and software in order to function accurately. The main parts in this work are Arduino Uno R3, kit relay, LDR (Light Dependent Resistor), LM35 (temperature sensor), high-efficiency solar panel and satellite motor. The Protuse software is used with (Arduino Uno) as embedded computer control. The results show the effectiveness of the complete tracking system.

The (brittle) behavior of concrete, although used in many fields, impedes its use in some applications that require (flexible) behavior, wherefore several types of fibers were utilized among them polypropylene fiber (PPF), that enhances pre-crack tensile strength, toughness, ductility performance, impact resistance, flexural strength resistance, and failure mode. This paper submits a comprehensive review of previous studies that discussed the properties and performance of utilizing PPF in normal and high strength concrete, recycled aggregate concrete and hybrid fiber concrete.