2,302 research outputs found
Applying Bag of System Calls for Anomalous Behavior Detection of Applications in Linux Containers
In this paper, we present the results of using bags of system calls for
learning the behavior of Linux containers for use in anomaly-detection based
intrusion detection system. By using system calls of the containers monitored
from the host kernel for anomaly detection, the system does not require any
prior knowledge of the container nature, neither does it require altering the
container or the host kernel.Comment: Published version available on IEEE Xplore
(http://ieeexplore.ieee.org/document/7414047/) arXiv admin note: substantial
text overlap with arXiv:1611.0305
β-N-methylamino-L-alanine Enhances Neurotoxicity Through Multiple Mechanisms
The idea that the environmental toxin β-N-methylamino-l-alanine (BMAA) is involved in neurodegenerative diseases on Guam has risen and fallen over the years. The theory has gained greater interest with recent reports that BMAA is biomagnified, is widely distributed around the planet, and is present in the brains of Alzheimer\u27s patients in Canada. We provide two important new findings. First, we show that BMAA at concentrations as low as 10 μM can potentiate neuronal injury induced by other insults. This is the first evidence that BMAA at concentrations below the mM range can enhance death of cortical neurons and illustrates potential synergistic effects of environmental toxins with underlying neurological conditions. Second, we show that the mechanism of BMAA toxicity is threefold: it is an agonist for NMDA and mGluR5 receptors, and induces oxidative stress. The results provide further support for the hypothesis that BMAA plays a role in neurodegenerative diseases
Determination of Doxycycline Hyclate by Batch and Reverse Flow Injection Analysis Based on the Oxidative Coupling Reaction with 3-Methyl-2-benzothiazolinone Hydrazone hydrochloride (MBTH)
New, simple and sensitive batch and reverse FIA spectrophotometric methods for the determination of doxycycline hyclate in pure form and in pharmaceutical preparations were proposed. These methods based on oxidative coupling reaction between doxycycline hyclate and 3-methylbenzothiazolinone-2-hydrazone hydrochloride (MBTH) in the presence ammonium ceric sulfate in acidic medium, to form green water-soluble dye that is stable and has a maximum absorbance at 626 nm. A calibration graph shows that a Beer's law is obeyed over the concentration range of 1-80 and 0.5-110 ?g.mL-1 of DCH for the batch and rFIA respectively with detection limit of 0.325 ?g.mL-1 of DCH for r-FIA methods. All different chemicals and physical experimental parameters affecting the development and stability of the colored product were carefully studied. The proposed methods were successfully applied for the determination of DCH in pharmaceutical preparations
Study Of Some Biochemical Parameters in Dose During Pregnancy in Goats
This study was made to study the level of biochemical parameters presence in pregnant and non-pregnant goats from middle east. The level of S. glucose, S. urea, S. creatinine, S. cholesterol, and S. triglycerides were determined and analysed using analysis of variance software at P-Value of P<0.05, which showed insignificance difference between the pregnant and non-pregnant goats. Other biochemical parameters determined and analysed in this work include S. total protein, S. albumen and S. globulin. The level of these parameters between pregnant and non-pregnant is in significance and therefore, looks similar. S. calcium, S. potassium and S. sodium minerals were also determined and analysed using the same method as mentioned above. The obtained results demonstrated that there is no significance difference between the pregnant and non-pregnant goats in terms of the level of some biochemical parameter
TITANIUM NANOPARTICLES CONJUGATED WITH STREPTOKINASE AS A MODIFIED THROMBOLYTIC AGENT
Objective: Blood clots are the main cause of death worldwide by stroke and myocardial infarction. Streptokinase a thrombolytic agent that is used in the treatment of circulatory disorders.
Methods: Titanium Nanoparticles was supplied from Changsha Santech Co. Its characterized were studied using (FT-IR, XRD, AFM, FE-SEM). Streptokinase at concentration 0.1 mg/ml was conjugated with Titanium nanoparticles using PH equal to 5.2 with continuous stirring. Formation of Streptokinase loading Titanium nanoparticles confirmed using FT-IR, Ninhydrine’s test and Bradford protein assay. Physicochemical Properties were studied in vitro. Thrombolytic activity in vitro was determined using d–dimer indicator and weight of blood clot after treatment as indicators of thrombolytic activity.
Results: Titanium nanoparticles show particle size at range 31 nm. The thrombolytic activity of streptokinase loading Titanium nanoparticles shows significant value in d-dimer and weight of blood clot compared with the control group and non-significant compared with an equivalent amount of streptokinase alone.
Conclusion: Titanium nanoparticles conjugated with streptokinase show high thrombolytic activity against blood clots in vitro
Elastic-plastic analyses using the solid-shell finite element SHB8PS and evaluation on sheet forming applications - COMPLAS XI
In this contribution, the formulation of the SHB8PS continuum shell finite element is extended to anisotropic elastic–plastic behavior models with combined isotropic-kinematic hardening at large deformations. The resulting element is then implemented into the commercial implicit finite element code Abaqus/Standard via the UEL subroutine. The SHB8PS element is an eight-node, three-dimensional brick with displacements as the only degrees of freedom and a preferential direction called the thickness. A reduced integration scheme is adopted using an arbitrary number of integration points along the thickness direction and only one integration point in the other directions. The hourglass modes due to this reduced integration are controlled using a physical stabilization technique together with an assumed strain method for the elimination of locking. Therefore, the element can be used to model thin structures while providing an accurate description of the various throughthickness phenomena. Its performance is assessed through several applications involving different types of non-linearities: geometric, material and that induced by contact. Particular attention is given to springback prediction for a Numisheet benchmark problem
Prediction of strain localization during sheet metal forming using bifurcation analysis and Gurson- type damage - Complas XI
The strain localization phenomenon that may occur during sheet metal forming represents a major cause of defective parts produced in the industry. Several instability criteria have been developed in the literature to predict the occurrence of these instabilities. The proposed work aims to couple a Gurson-type model to the Rice’s localization criterion. The implementation of the modeling is achieved via a user subroutine (Umat) in Abaqus/std using a Runge-Kutta explicit integration scheme. Finally, we show the effectiveness of the
proposed coupling for the prediction of the formability of stretched metal sheets
Fractal Antennas for Wireless Communications
When the length of the antenna is less than a quarter of the wavelength of the operating frequency, good radiation properties are difficult to obtain. However, size limitations can be overcome in this case using a fractal geometry antenna. The shape is repeated in a limited size such that the total length of the antenna is increased to match, for example, half of the wavelength of the corresponding desired frequency. Many fractal geometries, e.g., the tree, Koch, Minkowski, and Hilbert fractals, are available. This chapter describes the details of designing, simulations, and experimental measurements of fractal antennas. Based on dimensional geometry in terms of desired frequency bands, the characteristics of each iteration are studied carefully to improve the process of designing the antennas. In depth, the surface current distribution is investigated and analyzed to enhance the circular polarization radiation and axial ratio bandwidth (ARBW). Both, simulation and experimental, results are discussed and compared. Two types of fractal antennas are proposed. The first proposed fractal antenna has a new structure configured via a five-stage process. The second proposed fractal antenna has a low profile, wherein the configuration of the antenna was based on three iterations
Effect of Fuel on the Structural and Optical Properties of MgO Nanoparticles Prepared by Auto–Combustion of Sol-Gel Method
Magnesium nitrate as precursor and citric acid as fuel are used as a starting material for the preparation magnesium oxide (MgO) nanoparticles via sol- gel of auto–combustion method. X-ray diffraction patterns indicate that the obtain (MgO) nanoparticles are in good crystallinity and show that the all grain size was decreases with increasing of concentration citric acid as fuel. The crystallite size was calculated using Scherrer and Williamson-Hall formula at difference ratios of fuel which have maximum crystallite size (13.55 nm) and (14.26 nm) respectively. The SEM images for MgO powder prepared with fuel (Citric acid) at three various molar ratios show the morphology of the oxides is mostly spherical with some agglomeration. The optical properties show that the transmittance decrease with increase the fuel amount and additives ammonia and fuel played an important role in the combustion. Keywords: MgO , Nanoparticles , Sol-Gel, Auto–Combustion, Structural , Optica
Synthesis and Spectral Study of 2-(1-hydrazonoethyl) Pyridine Ligand and Their Complexes with Some Transition Metal (II)
In this study, new novel[APH=2-(1-hydrazonoethyl)pyridine] ligand; which have contained hydrazone group, and their transition metal complexes of [NiII, , ZnII and CdII] were synthesized.The (APH) ligand was synthesized by condensation of 2-Acetyl pyridine with hydrazine monohydrate, and the reaction of (APH) ligand with metal ions ratio of (2:1) respectively, were formed a mononuclear complexes with a metal(II) ions of types [M(APH)2]Cl2and [Ni(APH)2Cl2] when [M= NiII, ZnII, CdII].The ligand and their complexes were characterized and study on the basis of FT-IR and U.V.–visible. Some physical properties and spectral data for ligands and their complexes are given in Table 1 and 2. Keywords : metal complexes ; (APH) ; 2-Acetyl pyridine
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