A Novel Approach towards QoS Provisioning in Delay-sensitive Flows over Wireless Networks

A Novel Approach towards QoS Provisioning in Delay-sensitive Flows over Wireless Networks

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Part of #A Novel Approach towards QoS Provisioning in Delay-sensitive Flows over Wireless Networks# :

Publishing year : 2009

Conference : Fourteenth Annual International Conference of Computer Society of Iran

Number of pages : 6

Abstract: Wireless networks are poised to support a myriad of existing as well as emerging multimedia streaming applications. With the increase in the use of wireless local area networks (WLANs) ranging from simple data transfer to bandwidth-intensive, delay-sensitive, and loss-tolerant multimedia applications, quality service issues (QoS) have become a major research effort. Several challenges posed by robust video streaming over 802.11 WLANs include coping with packet loss caused by network buffer overflow, link erasures, or deadline misses. A major observation is that the MAC layer retry limit settings can be optimized in a way such that the overall loss of packets caused by link erasure, buffer overflow, or dead miss is minimized. In this paper, we propose a novel solution for minimizing packet loss in multimedia applications over WLANs. Simulation results justify the improved quality of the received video based on our proposed approach.

DIGITAL CAMERA IDENTIFICATION BY MODELING THE PROBABILITYDISTRIBUTION OF SENSOR PATTERN NOISE

DIGITAL CAMERA IDENTIFICATION BY MODELING THE PROBABILITYDISTRIBUTION OF SENSOR PATTERN NOISE

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Part of #DIGITAL CAMERA IDENTIFICATION BY MODELING THE PROBABILITYDISTRIBUTION OF SENSOR PATTERN NOISE# :

Publishing year : 2011

Conference : Seventh Conference on Visual Machine and Image Processing

Number of pages : 4

Abstract: Sensor pattern noise (SPN) as a fingerprint of imagingdevices, could be used as a reliable feature in digital sourceidentification. In this paper, we introduce a new method that uses the probability model of SPN to identify the resource. To achieve this goal, after extracting the SPN ofsome images, they are digitized, and then for each value, its neighbors are distributed separately (Value-Model). Finally, using the value-model, the quantizedSPN is mapped to the probability domain. The average of probability matrix of some images of the same camera formscamera model. This SPN model causes noticeable increases in the true detection rate of the source. To evaluate theefficiency of the proposed approach, we do some benchmark onour hypothesis. The accuracy and performance of our modelcompared to similar works, proves the high efficiency of theproposed theory.

Design and implementation of a User Generated Model to find out visual and acounstic pollution

Design and implementation of a User Generated Model to find out visual and acounstic pollution

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Part of #Design and implementation of a User Generated Model to find out visual and acounstic pollution# :

Publishing year : 2014

Conference : The 2nd International Congress on Architecture, Urban Development and Architecture

Number of pages : 9

Abstract: More and more people as users gain access to Location Based Services (LBS). However, using LBS can raise privacy concerns for users but people are increasingly using tools that apply the concept of location. This study introduced a system to increase the environmental quality by finding out the place that is affected by visual and acoustic pollution through the Ubiquitous Volunteered Geospatial Information (U-VGI) information environments. We design a model to demonstrate how visual and acoustic pollution can be driven from VGI without privacy concerns. The collected data is in the text form and since VGI websites face a large amount of information, a specific text mining algorithm is used to generate desire data. This study compares the color distribution in each direction of a specific landscape to detect visual pollution caused by inappropriate color distribution as well as elicits the user's idea of the sound of the environment. Two algorithms of sound data mining and visual data mining are handled here. The output of these algorithms is used to recommend those involved to produce such volunteered data to suggest them the most appropriate place depending on their psychological behavior and mental and physical illness. This state encourages people to participate more and, by doing so, a comprehensive data base will be developed.

Investigating the effect of stair height on the knee moment in stair descending

Investigating the effect of stair height on the knee moment in stair descending

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Part of #Investigating the effect of stair height on the knee moment in stair descending# :

Publishing year : 2012

Conference : 19th Iranian Conference on Medical Engineering

Number of pages : 6

Abstract: The staircase has been used by engineers and technicians since the end of the year. One of the sections covered by biomechanics is a pathology in different movements. One of these movements, which occurs almost daily in people's lives, is to climb up and down the stairs and the resulting damage to the knee in the middle and middle ages. Particularly in the baroque, more and more people are seen. Many biomechanics have studied staggering from different perspectives, such as the impact of stairs on muscle activity, the impact of weight on the impact of torques on the lower extremities, the impact of lowering the flow and … Part of these studies Nyrvvgshtavr calculated by inverse dynamics of arthritic limb is allocated by force and motion analysis measuring devices is made possible dynamics and kinematics, torque, knee and ankle joints, especially hips are calculated in different parts of the unknown forces

Parametric Evaluation of Cable Stayed Bridges with Dynamic Push-Over Analysis

Parametric Evaluation of Cable Stayed Bridges with Dynamic Push-Over Analysis

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Part of #Parametric Evaluation of Cable Stayed Bridges with Dynamic Push-Over Analysis# :

Publishing year : 2011

Conference : Fifth International Conference on Science and Technology

Number of pages : 7

Abstract: Incremental Dynamic Analysis (IDA) is a parametric analysis method that has recently emerged in several different forms to more thoroughly evaluate structural performance under seismic loads. It involves subjecting a structural model to one (or more) ground mo-tion records, each scaled to multiple levels of intensity, thus producing one (or more) curves of response parameterized versus intensity levels. This paper attempts to evaluate and compare the seismic Behavior of three different cable layouts; Namely harp, semi-harp and fan type. For this purpose, three cable-stayed bridges are modeled and analyzed using a nonlinear method by SAP2000 and then the abovementioned curves are produced.

Evaluation of Non-stationary Earthquake Records using Stockwell Transform

Evaluation of Non-stationary Earthquake Records using Stockwell Transform

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Part of #Evaluation of Non-stationary Earthquake Records using Stockwell Transform# :

Publishing year : 2011

Conference : 6th International Conference on Seismology and Earthquake Engineering

Number of pages : 8

Abstract: Timeier frequency analysis of earthquake records using a Fourier transform is a fundamental and reliable tool in the earhquake engineering and engineering seismology, however, it is no longer functional if the frequency analysis is analyzed in time domain. Alternatively short time, the Fourier Transform is utilized for the task but it also has some limitations / restrictions.

The relationship between the sense of taste and electromagnetic waves

The relationship between the sense of taste and electromagnetic waves

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Part of #The relationship between the sense of taste and electromagnetic waves# :

Publishing year : 2015

Conference : International Conference on Science and Technology

Number of pages : 7

Abstract: In this paper, we examined the working process of the taste cells and especially the sour taste, studied the signal corresponding to this taste in the case of the taste cell, used the recorded samples, simulated the signal corresponding to the acid taste by using Soft wares and mathematical techniques, converted the signals from analog to digital and obtained the signal equation. Finally we designed the micro-controller circuit that corresponds to this signal. This circuit can be designed and implemented on an IC that can be fixed on the taste cells of the sour taste and stimulates the taste cells in this way and the neurons send the electric message resulting from the stimulation to the brain and the person will feel the acid Taste without intact taste cells.

Theoretical Investigation of Hydrogen Adsorption on Ultra-Small Carbon Nanotubes

Theoretical Investigation of Hydrogen Adsorption on Ultra-Small Carbon Nanotubes

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Part of #Theoretical Investigation of Hydrogen Adsorption on Ultra-Small Carbon Nanotubes# :

Publishing year : 2009

Conference : The third meeting of Iran's fuel cell

Number of pages : 5

Abstract: The hydrogen adsorption on the surface of the ultra small radius (3.0) was investigated. The structural and electronic changes due to physical and chemical adsorption were studied by density functional theory-based calculations. The initial adsorptive orientation of the hydrogen molecules with respect to the nanotube surface was obtained by realistic molecular dynamics simulations. The resulting stable configuration was considered as the starting point for the rest of electronic analysis. The total energy, atomic charges, and energy band gaps were calculated at three states, namely the pristine, physisorbed, and hydrogenated (3.0) single-walled carbon nanotubes. The higher chemisorbed energy, in comparison with the larger larger diameter carbon nanotubes, was attributed to the strong curvature effect of this ultra-narrow nanotube. Both band structure and molecular orbital analysis have clearly shown that chemisorption makes conduction of the nanotube along the tube axis.

Thermal stability and flame retardancy of synthesized halloysite nanotubes (HNT)/ethylen propylene diene monomer (EPDM) nanocomposites

Thermal stability and flame retardancy of synthesized halloysite nanotubes (HNT)/ethylen propylene diene monomer (EPDM) nanocomposites

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Part of #Thermal stability and flame retardancy of synthesized halloysite nanotubes (HNT)/ethylen propylene diene monomer (EPDM) nanocomposites# :

Publishing year : 2011

Conference : International Conference on Polymer Processing

Number of pages : 4

Abstract: The synthesized halloysite nanotubes in EPDM matrix are synthesized in EPDM composites. Halloysite nanotubes (HNTs) are a kind of aluminosilicate clays mined from natural deposits in countries such as New Zealand, America, Brazil, and so on. Iran lacks these resources, but is rich in natural minerals such as kaolin clays. It has a good flame retardant and can be used instead of flame retardants. In this study, the effect of synthesized HNTs in reducing the flammability of ethylene propylene diene monomer composites instead of using decabromodiphenyl oxide and antimony trioxide as flame retardants (FRs), which produce toxic and stable gas molecules after combustion. The results showed that homogenous dispersion of HNTs within the EPDM, tubular structure of HNTs, and inter-tubular interactions between HNTs and EPDM were the main reasons for the reduction of flammability and thermal properties of EPDM compounds

Synthesis Calculation of Total Exposure Effective Dose to Members of the Public Due to Radioactive Material Release by Nuclear Fission Product

Synthesis Calculation of Total Exposure Effective Dose to Members of the Public Due to Radioactive Material Release by Nuclear Fission Product

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Part of #Synthesis Calculation of Total Exposure Effective Dose to Members of the Public Due to Radioactive Material Release by Nuclear Fission Product# :

Publishing year : 2014

Conference : The first Iranian congress of modern technology to achieve sustainable development

Number of pages : 5

Abstract: In this paper, the total exposure of the effective dose caused by release of airborne radioactive material due to leakages with an equivalent diameter of 100 mm & amp; More from primary to secondary circuit was investigated. Exposure of receptor from the passage of Gamma rays to radioactive cloud or so-called air submersion & amp; Inhalation of radionuclides during this passage time are considered & amp; Also exposure from the ground shine of radioactive material that deposited on the ground is considered as route exposure. The maximum concentration (/ Q) is predicted to be 3.3e-5 sec / m3 & amp; In a preliminary report on the safety assurance (PSAR) for a typical case, reported at a distance of 600m from the stack, which is in good agreement with the amount of 3e-5sec / m3 reported at a wind speed of U = 1m / s in the weather class. VVER1000 Nuclear Power Plant.