Academic Science Journal

Packet steganography is a secret mechanism that can be used to leak significant information across a network in a manner that violates security policy and it can be difficult to detect. The huge amount of data and vast number of different protocols in the internet seems ideal as a cover for secret messages. In this research, a proposed method is suggested for packet steganography system. The proposed method uses the TCP/IP protocol header field to cover secret message. The secret characters are encoded to ASCII code before merged in IP ID field using specially designed embedding / extracting algorithms in order to make the system more complex to be defeated by attackers. Results are tested successfully with secret message of (42) character, and cover of (100) raw packets.

Pure and (1 and 3 wt%) kaolin doped PVA films were synthesized by solution casting method, and exposed to 60Co--rays, activity 2μCi for two weeks, The optical characterizations of the films were carried out using UV-Vis transmittance spectrophtometer in the wavelength range 300–900 nm. The results show that in the visible region the transmittance of the films increases as the kaolin concentration increase clearly as comared with the same film before irradiation. The dominant transmittance band of UV region increases after irradiation while the reverse is the case with the reflectance. Also results indicates that PVA films have an indirect band gap that decreased from 3.7 to 3.55 eV as the doping concentration increases to 3wt%. Also the energy band gap of the irradiated films appeared to be decreased from 3.9 eV down to 3.4 eV.

In this work, physical phenomena related to the growth and phase formation of alumina, (Al2O3), powder are investigated by experiments and computer calculations. The specimens were formed by slip casting technique. These specimens were fired at various temperatures (500, 1100 and 1600) °C. Alumina samples with different dopant percentages were prepared to study their various physical properties. Before casting, slurries with (60 wt. %) solid content and different percentages of dopant additions were prepared. The dopant used here is kaolinite with (0, 5, 10 and 15) percentage addition, where kaolinite is one of many types of raw materials that have plasticity and advantage of securing. Sodium carboxymethylcellulose (Na-CMC) solution was used as dispersant. The stability of the slip clearly depends on the percentage of dispersant added and the best ratio is found to be (0.33 ml) for each gram of solids. Kaolinite percentage increase leads to decreasing the porosity, water absorption and mass losses. But it leads to increase thermal conductivity, density and shrinkage.

Metal complexes of Schiff base ligand(L), prepared via condensation of 4−aminoantipyrine and benzil, are prepared. The ligand is characterized based on elemental analysis , IR, electronic spectrum , 1HNMR along with melting point. Metal complexes are reported and characterized based on elemental analysis , IR , electronic spectra , magnetic moment , molar conductance , 1HNMR (for zinc complex only) and chloride content along with mole ratio method and melting point . From the elemental analyses and mole ratio method , 1 : 2 metal : ligand for Mn(II) and Cu(II) complexes and 1:1 metal : ligand for Zn(II) and Cd(II) complexes, are found with molecular formula :[Mn (L)2Cl2]. H2O, [Cu(L)2(H2O)Cl ]Cl, [Zn(L)Cl2]. H2O and [Cd (L)Cl2] .
From the IR results , we suggested that the ligand (L) behaves as bidentate on complexation with metal ions via the azomethine nitrogen and carbonyl oxygen atom of five member ring of the ligand .The electronic spectral data and magnetic measurements indicate that the complexes exhibit octahedral geometry around Mn(II) and Cu(II) while tetrahedral geometry around Zn(II) and Cd(II) . The results of antibacterial activity showed that only Cd(II) complex have a high activity (22mm) for Eschirichia coli .

Toxoplasma gondii is an obligate, intracellular, parasitic protozoa that causes toxoplasmosis. Found worldwide, T. gondii is capable of infecting virtually all warm-blooded animals [1]. In this study, the incidence of Toxoplsma in human and stray cats were studied. One hundred and two serum samples from married and non married women were examined by ELISA and LATEX tests in Kirkuk city from July to December 2012. The results showed that the ELISA test is significantly (P > 0.05) more sensitive than LATEX, with the rate of 36.53 % positive samples for ELISA compared with 21.15% by LATEX test. The most age group which was infected by Toxoplasma in married women was 34-37 years followed by 30-33years, while the most age group which was infected with the parasite in none married women was 13-16 years. The positive blood groups women appears to be significantly (P > 0.05) more at risk for getting toxoplasmosis especially A+(66.6%) and AB+(60%) blood groups. Toxoplasmosis was significantly (P > 0.05) more prevalent among married pregnant women (34.2) comparing with married non pregnant women, and the rate of aborted women among them were 25%. High rate of them had two (57.1%) to three (40%) times abortion. Among 30 Toxoplasma positive samples, 10 (33.3% ), 8 (42.1%) of them had cats at residence when examined by ELISA and LATEX respectively. The significantly (P > 0.05) antibody positive samples were for IgG with rate of 85.5 and 81.8 % in ELISA test for married and none married women respectively, comparing with those samples having IgM and those having both IgG and IgM. Most of the sample examined by LATEX had low titration (1/10, 1/40) in both married and non married women. Fifty stray cat fecal samples were examined microscopically by compound light and fluorescent microscope to detect the oocyst stage, 6 samples were positive with rate of 12%.

Reaction of bidentate m-amino benzoic acid (mABAH) with metal salts of (Cu(II), Pb(II), Zn(II), Mn(II), Co(II), Cd(II), Ni(II)) yields the new complexes of type [M(mABA)2] (where M = Cu(II), Pb(II) or Zn(II), Mn(II), Cd(II)), and [Hg(mABA)(H2O)Cl] and [M(mABA)2(H2O)2] (where M = Co(II), Ni(II)). The metal complexes were characterized by elemental analysis, molar conductance and IR spectra confirm coordination through nitrogen atom of amine group and the oxygen atom of the carboxylic anion group to the central metal ion. The magnetic moment data suggested for all complexes to have a tetrahedral and octahedral geometry around the central metal ion. The electronic spectral data also agree with their proposed structures. Biological activity of the ligands (mABAH) and their metal complexes were tested against gram positive bacteria (Staphylococcus arreus) and gram negative bacteria (Escherichia coli. and Pseudomonas aeruginosa).

Environmental pollutants like heavy metals at lowe concentrations are required for various metabolic activities of microbes including Rhizobia and legume crops on one hand, the excessive metal concentrations on the other hand cause undeniable damage to Rhizobia, legumes and their symbiosis. This study deals with the effect of different levels of zinc element in the efficiency and growth of Sinorhizobium meliloti that infect Alfa alfa plant(Medicago sativa) laborator. Symbiotic characteristics of these bacteria and some characteristic of Alfa alfa plants were studied by treating them with zinc element under normal conditions. Four isolates of S. meliloti have been isolated and identified from root nodules of Medicago sativa plants. These plants were gathered from different agricultural locations in Baghdad and Diyla provinces. Symbols have been given for each isolate (AN-1,AN-2 AN-3 and AN-4).The viable bacterial count have been measured (Cfu) laboratory under the effect of three concentrations of zinc element(0.1, 0.2, 0.3 g/L) through incubation for 48, 72 hours from the beginning of bacterial growth. The results showed significant decrease (P≤0.05) in viable bacterial count and for all zinc concentrations that are used compared with control groups. Increasing zinc concentrations leads to decrease .Also, there were differences between isolates since AN-3, AN-4 isolates were the more sensitive for zinc element than other isolates. The alfa-alfa plants were infected with (AN-1, AN-2, AN-3 and AN-4) isolates. These plants were cultured in soil treated with (0.13, 0.2, 0.52 g /3Kg) concentrations of zinc under normal conditions. Some characteristic of alfa-alfa plants were studied; such as the measurement of the length of shoot and root net, measurement of the dry and wet weight of the plants, number of root nodules, percentage of nitrogen and the content of protein in plants. Also the results showed ahighly significant decrease of (P≤0.05) for most plan characteristics that are under study, and an apparent decrease in the nodulation process of the plants in comparision with the control groups. The most negatively effected isolates were (AN-3, AN-4) and then (AN-1, AN-2).

Seismic refraction survey is conducted along both banks of Euphrates River, northwestern of AL-Anbar governorate in order to investigate the subsurface structures at the study area. Four main layers are delineated from the results of interpretation to the seismic data. The first layer represents surface layer which corresponding to quaternary deposits , the ranges of velocity and thickness to the first layer are (600m/sec-950m/sec) and (2.26m-7.4m) respectively. The second layer corresponding to Euphrates Formation with ranges of velocity and thickness between (1400 m/sec -2000 m/sec) and (6.2 m-21.2 m) respectively. Third layer corresponding to Anah Formation with velocity and thickness ranges between (2400 m/sec -3000 m/sec) and (20.6m-40.4m) respectively. Fourth layer corresponding to Baba Formation it has velocity range between (3333m/sec- 4000m/sec). The area at the right bank of Euphrates River is characterized by complex geological situation. Two faults are recognized on the right bank of Euphrates River (F1 and F2), both of them are normal. The first one is located at a distance of 230 m from the river bank and the second is located at a distance of 575m from the river bank. The area at the left bank of the Euphrates refer is characterized by horizontal layers and there is no evidence of any subsurface faults in this part of the study area.

Theoretical consideration of the possible kinematics for neutron / alpha particles emission phenomena's are necessary in understanding the physical behavior concern the thermonuclear fusion reaction. Our study concentrate on the calculation of the fusion products energies for the D-T fusion reaction ,since these materials represent the essential fuels in almost fusion power devises like Tokomak, dense plasma focus,….etc. it seen that there exist a good agreement between our calculations and the standard theoretical and experiment. And for this case, one can depend our model for the calculations of these physical parameters.

In our present work, we focus on study the reaction between hydrogen isotopes, which are the most important fuels for controlled fusion research, namely, the D-3He reaction. As a source of protons with 14MeV.The strong dependence of the basically hot plasma parameters such as differential cross section ,reactivity and the energy for emitted protons, upon the total cross section, make the problems for choosing the desirable formula for the differential cross section, the main goal for this work.

In this study the levels of L-fucose, Glutathion, testosterone and some trace elements in sera of patients with prostate cancer and control group were estimated for 30 samples of prostate cancer and 25 samples of control groups. The results showed there was a significant increase in the level of total L-fucose at (p>0.001) for blood serum of patients with prostate cancer compared with their levels in control group, while there were a significant decrease in testosterone and Glutathion at (P ≤ 0.01) and (P ≤ 0.05) respectively for blood serum of patients with prostate cancer compared with their level in control group. Trace elements there was a significant decrease in the level of selenium at (p>0.001) and a significant increase in Cadmium and Zinc at (P ≤ 0.05) and (P ≤ 0.01) respectively for blood serum of patients with prostate cancer compared with their level in control group.
The smoking factor at prostate cancer showed a significant decrease in glutathion and Zinc at (P ≤ 0.001) while the results showed a significant increase in L-fucose and Cadmium at (P ≤ 0.001) and (P ≤ 0.05) respectively. The correlations between all parameters above for patients and control group and the correlation of all parameters with age has been obtained.

In this work, the properties of 170-180W isotopes are studied by the E-GOS curves and the relation between energy levels and E2 showed that 170-180W lie in SU(3)-O(6) transition region were investigated to calculate the energy levels of ground state band according to the Interacting Boson Model (IBM-1). The entire calculations and drawing of the figures implemented by one program written by matlab language. The results are compared with experimental data and showed good agreement.