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129,463 full-text articles. Page 3522 of 3838.

Fractional Factorial Design Optimization Of Nontraditional Completion Fluid For Perforation With Underbalance, Abdul Aziz Abdul Raman 2010 University of Malaya

Fractional Factorial Design Optimization Of Nontraditional Completion Fluid For Perforation With Underbalance, Abdul Aziz Abdul Raman

Abdul Aziz Abdul Raman

Optimal well performance is always associated with the creation of a clean and undamaged connection between wellbore and reservoir. However, it is apparent that the use of shaped-charge perforating tends to produce perforation-induced formation damage. This damage impairs fluid flow and decreases well productivity. To minimize and eliminate this damage, underbalance perforating should be considered. Underbalance perforating has been considered as one of the best means of providing a transient surge flow for tunnel cleanup. This paper introduces the formulation of super lightweight completion to achieve underbalance condition. The formulation was optimized using fractional factorial design. The result indicates that ...


Estimation Of Sediment Yield And Selection Of Suitable Sites For Soil Conservation Measures In Ahar River Basin Of Udaipur, Rajasthan Using Rs And Gis Techniques, Deepesh Machiwal, S Srivastava, Sadhna Jain 2010 Central Arid Zone Research Institute, RRS, Kukma, Bhuj

Estimation Of Sediment Yield And Selection Of Suitable Sites For Soil Conservation Measures In Ahar River Basin Of Udaipur, Rajasthan Using Rs And Gis Techniques, Deepesh Machiwal, S Srivastava, Sadhna Jain

Dr. Deepesh Machiwal

The present study aimed at quantification of sediment yield for Ahar River basin of Udaipur district in Rajasthan, India by a regional empirical model using RS and GIS techniques. The land use/land cover (LULC) map of the study area was prepared by supervised classification using satellite imagery of IRS-P6 LISS III. Overall accuracy of the prepared LULC map was 90.78%. The major portion of the study area (49%) is covered with rangeland. Slope map for the study area was developed using digital elevation model. The slope in most of the study area (40% of the total area) ranges ...


Effect Of Using Aqueous/Alcohol Solution During Solution Doping On The Physical And Chemical Characteristics Of Pre-Sintered Silica Soot And The Resultant Native Glass Species Concentration, Faisal Rafiq Mahamd Adikan 2010 University of Malaya

Effect Of Using Aqueous/Alcohol Solution During Solution Doping On The Physical And Chemical Characteristics Of Pre-Sintered Silica Soot And The Resultant Native Glass Species Concentration, Faisal Rafiq Mahamd Adikan

Faisal Rafiq Mahamd Adikan

This paper presents the effect of solution doping on pre-sintered silica soot prepared by flame hydrolysis deposition Additionally the effects of using either an aqueous or alcohol solution on the soot layer and the resultant concentration of native glass species (pre- and post-consolidation) are also discussed Soot consisting native glass species such as SiO2 GeO2 P2O5 and B2O3 was pre-sintered with temperatures ranging from 550 C to 950 C before undergoing solution doping Cross-sectional thickness of the soot layer following solution doping was measured via optical microscopy and subsequently compared with those prior to solution doping Significant variations of GeO2 ...


Usability Testing Icare: An Academic Electronic Health Record, T.H. Wyatt, Xueping Li, C. Indranoi,, M. Bell 2010 University of Tennessee - Knoxville

Usability Testing Icare: An Academic Electronic Health Record, T.H. Wyatt, Xueping Li, C. Indranoi,, M. Bell

Xueping Li

No abstract provided.


Damping Of Power System Oscillations Using Genetic Algorithm And Particle Swarm Optimization, Mahdiyeh Eslami, Hussain Shareef, Azah Mohamed, Mohammad Khajehzadeh 2010 Department of Electrical Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran

Damping Of Power System Oscillations Using Genetic Algorithm And Particle Swarm Optimization, Mahdiyeh Eslami, Hussain Shareef, Azah Mohamed, Mohammad Khajehzadeh

Mohammad Khajehzadeh

No abstract provided.


Design A Stable 14-To-20-Ghz Source, M. Moghavvemi, A. Attaran, Hossein Ameri Mahabadi 2010 Department of Electrical Engineering, University of Malaya

Design A Stable 14-To-20-Ghz Source, M. Moghavvemi, A. Attaran, Hossein Ameri Mahabadi

Hossein Ameri Mahabadi

Careful selection of key components and the use of straightforward multiplication schemes can be applied to the design of a low-noise frequency synthesizer for Ku-band signals to 20 GHz.


Nanoparticles Effect On Hydrocarbon Liquid Fuels Combustion, Arash Najafi, A. Moghaddam 2010 University of Mohaghegh Ardabili

Nanoparticles Effect On Hydrocarbon Liquid Fuels Combustion, Arash Najafi, A. Moghaddam

Arash Najafi

Nanoparticles effect on Flame spread time over kerosene and diesel oil was studied. Results showed nanoparticles addition to fuels was increased flame spread time by 15-30% for kerosene and 6-26 % for diesel oil. Also, Nanoparticles effect on flame temperature on engulfed object in pool fire was studied. Results showed nanoparticles existence had reduced average temperature 15.1 % for kerosene and 5.5 % for diesel oil.


Anubis: An Attestation Protocol For Distributed Context-Aware Applications, Senaka Buthpitiya, Feng-Tso Sun, Heng-Tze Chen, Patrick Tague, Martin Griss, Anind Dey 2010 Carnegie Mellon University

Anubis: An Attestation Protocol For Distributed Context-Aware Applications, Senaka Buthpitiya, Feng-Tso Sun, Heng-Tze Chen, Patrick Tague, Martin Griss, Anind Dey

Patrick Tague

Sharing sensitive context information among multiple distributed components in mobile environments introduces major security concerns. The distributed sensing, processing and actuating components of these applications can be compromised and modified or impersonated to extract private and confidential information or to inject false information. In this paper we present the Anubis protocol for remote code attestation and access control of distributed components using remote execution of trusted code. Our Anubis protocol leverages previous work in the fields of wireless sensor networks and secure web browsing. Anubis allows new components to be introduced to the environment without updating existing components. Our implementation ...


An Approach To Analyse Energy And Exergy Analysis Of Thermal Power Plants: A Review, Siva Reddy V, Kaushik S.C., Tyagi S.K, Panwar NL 2010 IIT Delhi

An Approach To Analyse Energy And Exergy Analysis Of Thermal Power Plants: A Review, Siva Reddy V, Kaushik S.C., Tyagi S.K, Panwar Nl

Dr. V. Siva Reddy

In this paper, a thermodynamic analysis of a coal based thermal power plant and gas based cogeneration power plant has been carried out. The energy and exergy analysis has been studies for the different components of both power plants. The paper analyses the information available in the open literature regarding energy and exergy analysis on high temperature power plant has been included. A comprehensive literature review on thermal power plants, especial-ly boiler in coal base thermal power plants and combustion chamber in gas-steam cogeneration has been included. Finally, explaining the procedure of analysis of thermal power plant systems by exegetical ...


Load Frequency Stabilization By Coordinated Control Of Thyristor Controlled Phase Shifters And Superconducting Magnetic Energy Storage For Three Types Of Interconnected Two-Area Power Systems, Praghnesh Bhatt 2010 Charotar University of Science and Technology

Load Frequency Stabilization By Coordinated Control Of Thyristor Controlled Phase Shifters And Superconducting Magnetic Energy Storage For Three Types Of Interconnected Two-Area Power Systems, Praghnesh Bhatt

Praghnesh Bhatt

No abstract provided.


High Switching Endurance In Taoxtaox Memristive Devices, Jianhua Yang, M Zhang, John Strachan, Feng Miao, Matthew Pickett, Ronald Kelley 2010 University of Massachusetts - Amherst

High Switching Endurance In Taoxtaox Memristive Devices, Jianhua Yang, M Zhang, John Strachan, Feng Miao, Matthew Pickett, Ronald Kelley

Jianhua Yang

We demonstrate over 1#2;1010 open-loop switching cycles
from a simple memristive device stack of
Pt/TaOx /Ta. We compare this system to a similar device
stack based on titanium oxides to obtain insight into the
solid-state thermodynamic and kinetic factors that influence
endurance in metal-oxide memristors.
Memristive devices have attracted significant attention
because of their great potential for next generation
nonvolatile memory,1,2 stateful logic operations via material
implication,3 neuromorphic computing,4 and a variety of
complementary metal-oxide semiconductor #2;CMOS#3;/
memristor hybrid circuits.5,6 Accordingly, significant
progress has been made in understanding the ...


15 - معيارهاي نوين طراحي سيستمهاي سرمايش و گرمايش در ساختمانها بر مبناي ايجاد شرايط آسايش حرارتي, Alireza Zolfaghari, Mehdi Maerefat 2010 University of Birjand

15 - معيارهاي نوين طراحي سيستمهاي سرمايش و گرمايش در ساختمانها بر مبناي ايجاد شرايط آسايش حرارتي, Alireza Zolfaghari, Mehdi Maerefat

Dr Alireza Zolfaghari

No abstract provided.


3-D Printing Of Open Source Appropriate Technologies For Self-Directed Sustainable Development, Joshua M. Pearce, Christine Morris Blair, Kristen J. Laciak, Rob Andrews, Amir Nosrat, Ivana Zelenika-Zovko 2010 Queen's University - Kingston, Ontario

3-D Printing Of Open Source Appropriate Technologies For Self-Directed Sustainable Development, Joshua M. Pearce, Christine Morris Blair, Kristen J. Laciak, Rob Andrews, Amir Nosrat, Ivana Zelenika-Zovko

Joshua M. Pearce

The technological evolution of the 3-D printer, widespread internet access and inexpensive computing has made a new means of open design capable of accelerating self-directed sustainable development. This study critically examines how open source 3-D printers, such as the RepRap and Fab@home, enable the use of designs in the public domain to fabricate open source appropriate technology (OSAT), which are easily and economically made from readily available resources by local communities to meet their needs. The current capabilities of open source 3-D printers is reviewed and a new classification scheme is proposed for OSATs that are technically feasible and ...


Tuning Of Power System Stabilizers Using Particle Swarm Optimization With Passive Congregation, Mahdiyeh Eslami, Hussain Shareef, Azah Mohamed, S. P Ghoshal 2010 Department of Electrical Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran

Tuning Of Power System Stabilizers Using Particle Swarm Optimization With Passive Congregation, Mahdiyeh Eslami, Hussain Shareef, Azah Mohamed, S. P Ghoshal

Dr. Mahdiyeh Eslami (مهدیه اسلامی)

No abstract provided.


Control Of A High-Performance Z-Source Inverter For Fuel Cell/Supercapacitor Hybrid Electric Vehicles, Omar Ellabban, Joeri Van Mierlo, Philippe Lataire 2010 Helwan University

Control Of A High-Performance Z-Source Inverter For Fuel Cell/Supercapacitor Hybrid Electric Vehicles, Omar Ellabban, Joeri Van Mierlo, Philippe Lataire

Omar Ellabban

This paper presents a supercapacitor (SC) module connected in parallel with fuel cell (FC) stack to supply a high-performance Z-Source Inverter (HP-ZSI) feeding a three phase induction motor for hybrid electric vehicles applications. The supercapacitor is connected between the input diode and the bidirectional switch of the highperformance ZSI topology. The indirect field-oriented control (IFOC) method is used to control an induction motor speed during motoring and regenerative braking operations to produce the modulation index and a dual loop controller is used to control the Z-network capacitor voltage to produce the shoot-through duty ratio. MATLAB simulation results verified the validity ...


Hydrogen Production From Methane Under The Interaction Of Catalytic Partial Oxidation, Water Gas Shift Reaction And Heat Recovery, Wei-Hsin Chen 2010 National Cheng Kung University

Hydrogen Production From Methane Under The Interaction Of Catalytic Partial Oxidation, Water Gas Shift Reaction And Heat Recovery, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


Improved Particle Swarm Optimization With Disturbance Term For Multi-Machine Power System Stabilizer Design, Mahdiyeh Eslami, Hussain Shareef, Azah Mohamed, Mohammad Khajehzadeh 2010 Department of Electrical Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran

Improved Particle Swarm Optimization With Disturbance Term For Multi-Machine Power System Stabilizer Design, Mahdiyeh Eslami, Hussain Shareef, Azah Mohamed, Mohammad Khajehzadeh

Azah Mohamed

No abstract provided.


15 - معيارهاي نوين طراحي سيستمهاي سرمايش و گرمايش در ساختمانها بر مبناي ايجاد شرايط آسايش حرارتي, Alireza Zolfaghari, Mehdi Maerefat 2010 University of Birjand

15 - معيارهاي نوين طراحي سيستمهاي سرمايش و گرمايش در ساختمانها بر مبناي ايجاد شرايط آسايش حرارتي, Alireza Zolfaghari, Mehdi Maerefat

Dr Alireza Zolfaghari

No abstract provided.


A Spectrum Of Traffic Flow Modeling At Multiple Scales, Daiheng Ni 2010 University of Massachusetts - Amherst

A Spectrum Of Traffic Flow Modeling At Multiple Scales, Daiheng Ni

Daiheng Ni

his paper presents a broad perspective on traffic flow modeling at a spectrum of four scales. Modeling objectives and model properties at each scale are discussed and existing efforts are reviewed. In order to ensure modeling consistency and provide a microscopic basis for macroscopic models, it is critical to address the coupling among models at different scales, i.e. how less detailed models are derived from more detailed models and, conversely, how more detailed models are aggregated to less detailed models. With this understanding, a consistent modeling approach is proposed based on field theory and modeling strategies at each of ...


Optimal Allocation Of Tcsc Devices Using Genetic Algorithms, Almoataz Youssef Abdelaziz 2010 Electrical Power & Machines Department, Faculty of Engineering, Ain Shams University

Optimal Allocation Of Tcsc Devices Using Genetic Algorithms, Almoataz Youssef Abdelaziz

Almoataz Youssef Abdelaziz

This paper presents an approach to find the optimal location of thyristor-controlled series compensators (TCSC) in a power system to improve the loadability of its lines and minimize its total loss. Also the proposed approach aims to find the optimal number of devices and their optimal ratings by using genetic algorithm (GA) with taking into consideration the thermal and voltage limits. Examination of the proposed approach is carried out on the IEEE 9-bus system.


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