Fingerprint positioning of users devices in long term evolution cellular network using K nearest neighbour algorithm

The rapid exponential growth in wireless technologies and the need for public safety has led to increasing demand for location-based services. Terrestrial cellular networks can offer acceptable position estimation for users that can meet the statutory requirements set by the Federal Communications Commission in case of network-based positioning, for safety regulations. In this study, the proposed radio frequency pattern matching (RFPM) method is implemented and tested to determine a user’s location effectively. The RFPM method has been tested and validated in two different environment. The evaluations show remarkable results especially in the Micro cell scenario, at 67% of positioning error 15m and at 90% 31.78m for Micro cell scenario, with results of 75.66m at 67% and 141.4m at 90% for Macro cell scenario

Altering CO binding on gold cluster cations by Pd-doping

The introduction of dopant atoms into metal nanoparticles is an effective way to control the interaction with adsorbate molecules and is important in many catalytic processes. In this work, experimental and theoretical evidence of the influence of Pd doping on the bonding between small cationic AuN+ clusters and CO is presented. The CO adsorption is studied by combining low-pressure collision cell reactivity and infrared multiple photon dissociation spectroscopy experiments with density functional theory calculations. Measured dissociation rates of cluster–CO complexes (N≤21) allow the estimation of cluster–CO binding energies, showing that Pd doping increases the CO adsorption energy to an extent that is size-dependent. These trends are reproduced by theoretical calculations up to N= 13. In agreement with theory, measurements of the C–O vibrational frequency suggest that for the doped PdAuN-1+ (N=3–5, 11) clusters, CO adsorbs on an Au atom, while for N=6–10 and N=12–14, CO interacts directly with the Pd dopant. A pronounced red-shifting of the C–O vibrational frequency is observed when CO interacts directly with the Pd dopant, indicating a significant back-donation of electron charge from Pd to CO. In contrast, the blue-shifted frequencies, observed when CO interacts with an Au atom, indicate that σ-donation dominates the Au–CO interaction. Studying such systems at the sub-nanometre scale enables a fundamental comprehension of the interactions between adsorbates, dopants and the host (Au) species at the atomic level

The Relationship between Cytokines and Toxoplasma Infection in Heart Disease Patients

Toxoplasmosis is the general term for infection and disease in man and animal caused by a parasite called Toxoplasma gondii, this disease is prevalent among different categories of people, Heart disease are one of them. Because of the dormancy status of T. gondii, there is ambiguity and variation in the immunity of patients. This study aimed to investigate the immune status of heart disease patients infected with toxoplasmosis. Two hundred and fifty samples of both heart disease patients and controls had been tested by ELISA technique to detect anti-Toxoplasma Abs (IgG and IgM). The positive samples with toxoplasmosis were tested to detect the level of interleukins (IL-10, IL-12 and IL-17).       The result of this study revealed the prevalence of toxoplasmosis among heart disease patient in about (43.33% IgG and 0.66% IgM). The results of interleukins appeared high level of IL-12 (82.85 pg./ml) in heart disease patients infected with toxoplasmosis when compared with control (60.97 pg./ml) with significant difference between them at p?0.05, while there was no significant difference in IL-10 between patients and controls. The results also showed decreased level of IL-17 in patients with heart disease. The increased level of IL-12 in patient with heart disease infected with toxoplasmosis indicate to the activity of cell mediated immunity in those patients and may be lead to provoke an inflammatory status in the heart valves and muscle then worse heart disease to be sever and need complicated treatment

The Relationship between Cytokines and Toxoplasma Infection in Heart Disease Patients

Toxoplasmosis is the general term for infection and disease in man and animal caused by a parasite called Toxoplasma gondii, this disease is prevalent among different categories of people, Heart disease are one of them. Because of the dormancy status of T. gondii, there is ambiguity and variation in the immunity of patients. This study aimed to investigate the immune status of heart disease patients infected with toxoplasmosis. Two hundred and fifty samples of both heart disease patients and controls had been tested by ELISA technique to detect anti-Toxoplasma Abs (IgG and IgM). The positive samples with toxoplasmosis were tested to detect the level of interleukins (IL-10, IL-12 and IL-17).       The result of this study revealed the prevalence of toxoplasmosis among heart disease patient in about (43.33% IgG and 0.66% IgM). The results of interleukins appeared high level of IL-12 (82.85 pg./ml) in heart disease patients infected with toxoplasmosis when compared with control (60.97 pg./ml) with significant difference between them at p≤0.05, while there was no significant difference in IL-10 between patients and controls. The results also showed decreased level of IL-17 in patients with heart disease. The increased level of IL-12 in patient with heart disease infected with toxoplasmosis indicate to the activity of cell mediated immunity in those patients and may be lead to provoke an inflammatory status in the heart valves and muscle then worse heart disease to be sever and need complicated treatment

Overview of Metal Ions Released from Fixed Orthodontic Appliance: In Vitro Studies

Intraoral fixed orthodontic appliances are frequently used in the clinical practice of dentistry. They are made from alloys containing different metals at various percentages. The use of these appliances leads to the long-term exposure of patients to these materials, and the potential toxic effects of this exposure raises concerns about patient safety. Thus, the biocompatibility (corrosion behaviour and toxicity) of these materials has to be evaluated prior to clinical use. In the present report, the most recent studies in the scientific literature examining metal ion release from orthodontic appliances and the toxic effects of these ions have been reviewed with a special focus on cytotoxicity and genotoxicity. Previous studies suggest that a case-by-case safety evaluation is required to take into account the increasing variability of materials, their composition and the manufacturing processes. Moreover, in vitro toxicity studies in regard to metal release, cytotoxicity and genotoxicity are still scarce. Therefore, in vitro monitoring studies are needed to establish cause-effect relationships between metal ion release and biomarkers of cytotoxicity and genotoxicity. Further investigations could be performed to elucidate the toxic mechanisms involved in the observed effects with a special emphasis on oxidative damage