Engineering and Technology Journal

Cobalt Ferrite (CoFe2O4) nanoparticles (NPs) were prepared by Sol-Gel precipitation method. Two samples were synthesized and sintered with different sintering temperatures; sample A at 400 °C and sample B at 800 °C for two hours. The prepared samples were characterized by XRD, FTIR, SEM, and AFM, Compressive test and Micro-hardness. The result showed as the sintering temperatures increased, the crystallite size increased from 10.07 nm to 15.14 nm. FTIR spectra showed two strong absorption bands in the range of 800 - 400 cm-1, confirmed formation of spinel ferrites NPs. SEM and AFM micrographs showed that the samples have an approximately spherical shape. The mechanical properties of CoFe2O4 NPs were not widely studied. Therefore, in this work, the mechanical properties (Compressive strength and Micro-hardness) of prepared material studied as an important contribution for researchers to focus on mechanical properties of CoFe2O4 NPs. Where the mechanical result showed that both the compressive strength was increased (from 4.42 to 10.57 N/mm2) and Micro-hardness (from 10.33 to 174.4 N/mm2) with increasing sintering temperature.

Rivest Cipher 4 (RC4) is one of most common stream cipher, but it experience many problem, such as, there is little combination between the plaintext and cipher-text. For this reason RC4 Cipher is vulnerable to a number of attacks. Thereupon, this paper proposes a new modification of the RC4 to strong it. This achieved by modifying key-stream generator based on linear equation with four state tables for generating random numbers. Key control is used for selecting one state table to apply # operation, then performing forward and backward effects to generate the key-stream that used in encryption and decryption. Being evaluated, the results obtained from the statistical probabilities prove that our proposed algorithm is more complex than the standard algorithm by using different key lengths. Also, our proposed RC4 pass the randomness in most metrics in NIST.

Ubiquitin protein has a conserved amino acid sequence, found in all eukaryotes and it is important in many of cellular functions .The increase or decrease in the ubiquitin level lead to causing many diseases including cancer .The aim of this study is to measure the concentration of ubiquitin c protein in blood serum of lung cancer patients and healthy control subjects by using ELISA technique. The Mean ± SD for ubiquitin c protein was (7.51 ± 5.76) in blood serum of the normal healthy subject and Std. Error mean was (1.82). While the Mean ± SD was (10.99 ± 4.56 ) for ubiquitin c protein in serum of lung cancer patients and Std. Error mean was (1.44) .The results showed no statistically significance the P value ( 0.15) between the protein concentration in the serum of patients with lung cancer compared to the serum concentration of healthy normal subjects.

Within a short amount of years, urban land in Baghdad governorate increased as a result of the improvement of the economic factor of human beings, the speedy enlargement Buildings method brought many negative climate issues, for instance, the violent modification of land use and the growth UHI, which led to a decrease in vegetation cover, where influenced the temperature averages, Accordingly, we conducted the following study to find solutions, From 2008 to 2018, Landsat Information 5 and 8 were adopted in this analysis, show that urbanization is increasing rapidly as well as the impact of degrees Temperature in this change, was the source of temperature data (ECMWF) for the province of the study, and the results of the method (IDW) used for temperature mapping showed a change in the rates of temperature in urban areas, where the decline of vegetation impact on temperature rates, As well as commercial activities developed by people, which occupied some agricultural land, which led to negative results ,Several previous kinds of research show that the developed lands by humans will affect the local climate. The satellites used were Landsat 5 and 8, where the images of the study area were taken by these satellites during the study period and were entered into a program (ArcGIS) for the objective of modification and clear output. From the information obtained from the results, there is an inverse correlation between increasing urbanization and air temperature rates and positive correlation with solar radiation and wind speed. We conclude from this information that the development of green lands without good coordination will affect the local environment

Due to the increasing electronic publishing sites for printed and certified newspapers, the reader faced the problem of reaching his goal by accessing these sites, which led to the neglect of a large section of important publications. The provision of an automated measure to verify the positive and negative articles based on the analysis of readers' comments on the articles is a necessity to see the important articles that are compatible with the corpus generated by us for inference. The project achieved the previous target and achieved a success rate. The Bag-of-Words Model (BoW) was used to obtain the repetition of the block of words to build the corpus. The proposed system is evaluated based on four metrics (Accuracy= 93%, Precision= 94%, Recall= 94% and F-measure= 94%). The effectiveness results obtain by this system was (Accuracy, Precision and Recall and F-measure).