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Optimization And Economic Evaluation Of Industrial Gas Production, YASAR DEMIREL, A. Kumar, D.D. Jones, M.A. Hanna 2009 University of Nebraska Lincoln

Optimization And Economic Evaluation Of Industrial Gas Production, Yasar Demirel, A. Kumar, D.D. Jones, M.A. Hanna

YASAR DEMIREL

Thermochemical gasification is one of the most promising technologies for converting biomass into power, fuels and chemicals. The objectives of this study were to maximize the net energy efficiency for biomass gasification, and to estimate the cost of producing industrial gas and combined heat and power (CHP) at a feedrate of 2000 kg/h. Aspen Plus-based model for gasification was combined with a CHP generation model, and optimized using corn stover and dried distillers grains with solubles (DDGS) as the biomass feedstocks. The cold gas efficiencies for gas production were 57% and 52%, respectively, for corn stover and DDGS. The ...


Development Of Variable High Frequency Voltage Source For Ohmic Heating Process, Arash Toudeshki 2009 Universiti Putra Malaysia

Development Of Variable High Frequency Voltage Source For Ohmic Heating Process, Arash Toudeshki

Arash Toudeshki

Heating is an important step in food processing. A new method of heating uses the natural electrical resistance of the food to generate heat. In this method electrical energy is transformed into thermal energy. This kind of food heating processing operation is called ohmic heating. The rate of ohmic heating critically depends on the electrical conductivity of the food during the process. Reviewing a number of researches shows that the usage of direct current for ohmic heating process causes electrolysis in liquid beverages. Moreover, usage of alternating current eliminates the probability of adverse electrochemical reaction. In addition, when the frequency ...


Non-Intrusive Characterization Of Fluidized Bed Hydrodynamics Using Vibration Signature Analysis, Mojgan Abbasi, Rahmat Sotudeh-Gharebagh, Navid Mostoufi, Reza Zarghami, M. J. Mahjoob 2009 University of Tehran

Non-Intrusive Characterization Of Fluidized Bed Hydrodynamics Using Vibration Signature Analysis, Mojgan Abbasi, Rahmat Sotudeh-Gharebagh, Navid Mostoufi, Reza Zarghami, M. J. Mahjoob

Navid Mostoufi

There are many techniques to characterize the hydrodynamics of fluidized beds but new techniques still are needed for more reliable measurement. Bed vibrations were measured by an accelerometer in a gas-solid fluidized bed in order to characterize the hydrodynamics of the fluidized bed in a non-intrusive manner. Measurements were carried out at different superficial gas velocities and particle sizes. Pressure fluctuations were measured simultaneously. Vibration signals were processed using statistical analysis. For the sake of the evaluation, the vibration technique was used to calculate minimum fluidization velocity. It was shown that minimum fluidization velocity can be determined from the variation ...


A Fair Contract For Managing Water Scarcity, R K Amit, Parthasarathy Ramachandran 2009 Indian Institute of Technology - Madras

A Fair Contract For Managing Water Scarcity, R K Amit, Parthasarathy Ramachandran

R K Amit

In public utilities, under supply constraints, fairness considerations lead to a market failure. This paper characterizes a two-period principal-agent contract for demand management, that mitigates this market failure in urban water systems. The contract is designed as an extensive form mechanism using subgame perfect Nash equilibrium (SPNE) as the solution concept. The contract is fair; and is shown to be economically efficient if, in case of deviation by the agent, the gain to the agent and the loss to the principal are small. It is shown that the assumption can be avoided in an infinite horizon contract.


Ontology-Based Information Extraction For Analyzing It Services, Amit Deokar, Sagnika Sen 2009 Dakota State University

Ontology-Based Information Extraction For Analyzing It Services, Amit Deokar, Sagnika Sen

Amit Deokar

Service Level Agreements (SLA) for multi-service Information Technology (IT) outsourcing contracts contain vast amounts of textual information. The SLAs provide details about a specific service, Key Performance Indicators (KPI) to measure its performance; as well as process elements, such as activities, events, and resources that are integral in achieving performance goals. However, KPIs and the process elements may be interrelated. The knowledge of such interrelationships is often tacitly present in the SLAs. The aim of our research is to extract this hidden information from IT service contracts and analyze them to empower customers of IT services to make better performance ...


The Context Matters: Maritime Safety In The Vessel Traffic Service (Vts) Domain, Gesa Praetorius, Margareta Lützhöft, Karl Bruno 2009 Selected Works

The Context Matters: Maritime Safety In The Vessel Traffic Service (Vts) Domain, Gesa Praetorius, Margareta Lützhöft, Karl Bruno

Gesa Praetorius

Vessel Traffic Service (VTS) is a service to the maritime community implemented to promote and improve maritime safety. In recent years VTS has become a topic of increased interest for maritime stakeholders and the general public. To derive insights on how maritime safety is constructed in the VTS domain this exploratory study was conducted. Four VTS centres were visited and 15 VTS operators were interviewed and observed at work. Further a focus group interview with 8 VTS operators with focus on decision support tools in the VTS domain was conducted. The results of the study indicate that VTS operators define ...


Investigating The Use Of 3d Graphics, Haptics (Touch), And Sound For Highway Location Planning, Chris Harding, Reginald Souleyrette 2009 Iowa State University

Investigating The Use Of 3d Graphics, Haptics (Touch), And Sound For Highway Location Planning, Chris Harding, Reginald Souleyrette

Reginald R. Souleyrette

Planning of transportation infrastructure requires analyzing combinations of many different types of geospatial information (maps). Conventional Geographic Information Systems (GIS) or Computer Aided Design systems limit the planner's ability to perceive and effectively use multiple data layers together. To improve the planner's ability to interact with multiple layers of disparate spatial information, we present a novel computer system, which combines vision with haptics (touch) and sound. In this new form of Multi-Sensory Information System (MSIS), visual information is augmented by a three-dimensional haptic device (PHANToM) and by sound (sonification). In a recent study, we investigated how engineering students ...


The Preliminary Insight Of Internal-External Npd Practices Integration And Product Development Time In Geographically Distributed Environment, Amlus Ibrahim, Geraldy Dadriyansyah, T Ramayah 2009 Universiti Utara Malaysia

The Preliminary Insight Of Internal-External Npd Practices Integration And Product Development Time In Geographically Distributed Environment, Amlus Ibrahim, Geraldy Dadriyansyah, T Ramayah

Geraldy Dadriyansyah

Global competitiveness is one of the most important issues in manufacturing industry nowadays. Almost every company in this business industry is affected by it and they are looking for new ways to remain aligned and competitive. In recent years, the long term success of some manufacturing firms and organizations has been enhanced by their ability to bring new products onto the market at regular and shorter intervals. In order to achieve that, effective new product development requires a good integration and collaboration between internal and external participants. Moreover, in current circumstances, issues on how to effectively integrate NPD constituents in ...


Leaching Of Vanadium From Ld Converter Slag Using Sulfuric Acid, Mohsen Aarabi, Fershteh Rashchi, Navid Mostoufi, Ehsan Vahidi 2009 University of Tehran

Leaching Of Vanadium From Ld Converter Slag Using Sulfuric Acid, Mohsen Aarabi, Fershteh Rashchi, Navid Mostoufi, Ehsan Vahidi

Navid Mostoufi

In order to extract vanadium from LD (Linz-Donawitz) converter slag of steelmaking plant and, an alkaline roasting-acid leaching study was carried out and effect of different parameters on the kinetics of vanadium dissolution was determined. The leaching residue was characterized by XRD, XRF and SEM/EDX analyzer. The maximum vanadium recovery of ca. 95% was achieved at the optimum leaching condition of 70 ºC, S/L: 1/15, acid concentration: 3M and leaching time: 150 minutes. It was shown particle size has a significant effect on the dissolution of vanadium and maximum extraction was achieved at the finest size of ...


1.05-Ghz Cmos Oscillator Based On Lateral-Field-Excited Piezoelectric Aln Contour-Mode Mems Resonators, Chengjie Zuo, Jan Van der Spiegel, Gianluca Piazza 2009 University of Pennsylvania

1.05-Ghz Cmos Oscillator Based On Lateral-Field-Excited Piezoelectric Aln Contour-Mode Mems Resonators, Chengjie Zuo, Jan Van Der Spiegel, Gianluca Piazza

Chengjie Zuo

This paper reports on the first demonstration of a 1.05-GHz microelectromechanical (MEMS) oscillator based on lateral-field-excited (LFE) piezoelectric AlN contour-mode resonators. The oscillator shows a phase noise level of −81 dBc/Hz at 1-kHz offset frequency and a phase noise floor of −146 dBc/Hz, which satisfies the global system for mobile communications (GSM) requirements for ultra-high frequency (UHF) local oscillators (LO). The circuit was fabricated in the AMI semiconductor (AMIS) 0.5-μm complementary metal-oxide-semiconductor (CMOS) process, with the oscillator core consuming only 3.5 mW DC power. The device overall performance has the best figure-of-merit (FoM) when compared ...


Lai - Introduction To Continuum Mechanics نسخه اصلی کتاب مکانیک محیط پیوسته ویرایش چهارم, Dr Alireza Zolfaghari 2009 Birjand University

Lai - Introduction To Continuum Mechanics نسخه اصلی کتاب مکانیک محیط پیوسته ویرایش چهارم, Dr Alireza Zolfaghari

Dr Alireza Zolfaghari

No abstract provided.


Assessment Of Provocative Tests For Superior Glenoid Labrum Lesions: An Evaluation Of The Biomechanical Properties Of Provocative Tests For Superior Glenoid Labrum Lesions, Seth Kuhlman 2009 Boise State University

Assessment Of Provocative Tests For Superior Glenoid Labrum Lesions: An Evaluation Of The Biomechanical Properties Of Provocative Tests For Superior Glenoid Labrum Lesions, Seth Kuhlman

Seth Kuhlman

The ultimate challenge facing the clinician evaluating patients with shoulder pathologies is to meld the understanding of each of the pathologies that affects the shoulder with an efficient, accurate, and cost effective means to establish a diagnosis. Clinical identification of Superior Labrum Anterior to Posterior (SLAP) lesions is particularly difficult due to the proximity of the many muscular and ligamentous structures that can confound diagnosis. The patient and clinician would benefit if reliable diagnosis could be made using less costly alternatives to MRI and arthroscopy. There has been considerable interest within the orthopedic community in developing a provocative test or ...


Investigating The Synergistic Effect Of D2ehpa And Cyanex 302 On Separation Of Zinc And Manganese, Tahereh Hosseini, Fershteh Rashchi, Navid Mostoufi, Ehsan Vahidi 2009 University of Tehran

Investigating The Synergistic Effect Of D2ehpa And Cyanex 302 On Separation Of Zinc And Manganese, Tahereh Hosseini, Fershteh Rashchi, Navid Mostoufi, Ehsan Vahidi

Navid Mostoufi

Synergistic effect of Cyanex 302 on extraction of zinc and manganese with D2EHPA in sulfate media was investigated. Experiments were carried out in the pH range of 1.0–5.0, temperature of 23, 40 and 60 C with sole D2EHPA and Cyanex 302 as extractant and D2EHPA to Cyanex 302 ratios of 1:3, 1:1 and 3:1. The experimental results showed that the co-extraction of zinc and manganese increased with increasing equilibrium pH and temperature. Increasing the D2EHPA to Cyanex 302 ratio in the organic phase, caused a left shifting of extraction isotherm of zinc and right ...


On Algebraic Properties Of Extreme Pathways In Metabolic Networks, Dimitrije Jevremovic, Cong Trinh, Daniel Boley 2009 University of Tennessee - Knoxville

On Algebraic Properties Of Extreme Pathways In Metabolic Networks, Dimitrije Jevremovic, Cong Trinh, Daniel Boley

Cong T Trinh

No abstract provided.


Complex Adaptive Ica Employing The Conjugate Gradient Technique For Signal Separation In Time-Varying Flat Fading Channels, Raghuram Ranganathan, Wasfy Mikhael, Thomas Yang 2009 University of Central Florida

Complex Adaptive Ica Employing The Conjugate Gradient Technique For Signal Separation In Time-Varying Flat Fading Channels, Raghuram Ranganathan, Wasfy Mikhael, Thomas Yang

Thomas Yang

No abstract provided.


A Neural Networks Algorithm For The Minimum Coloring Problem Using Fpgas, Haidar Harmanani, Jean Hannouche, Nancy Khoury 2009 Lebanese American University

A Neural Networks Algorithm For The Minimum Coloring Problem Using Fpgas, Haidar Harmanani, Jean Hannouche, Nancy Khoury

Haidar M. Harmanani

No abstract provided.


Design A Stable 14-To-20-Ghz Source, Prof Mahmoud Moghavvemi, A. Attaran, H. Ameri 2009 University of Malaya

Design A Stable 14-To-20-Ghz Source, Prof Mahmoud Moghavvemi, A. Attaran, H. Ameri

Professor Mahmoud Moghavvemi

No abstract provided.


Novel Predictive Tools For Design Of Radiant And Convective Sections, ali ali 2009 Selected Works

Novel Predictive Tools For Design Of Radiant And Convective Sections, Ali Ali

ali ali

No abstract provided.


Automated Fault Location In A Power System With Distributed Generations Using Radial Basis Function Neural Networks, Hadi Zayandehroodi, Azah Mohamed, Hussain Shareef, Marjan Mohammadjafari 2009 Department of Electrical Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran

Automated Fault Location In A Power System With Distributed Generations Using Radial Basis Function Neural Networks, Hadi Zayandehroodi, Azah Mohamed, Hussain Shareef, Marjan Mohammadjafari

Dr. Hadi Zayandehroodi

High penetration of Distributed Generation (DG) units will have unfavorable impacts on the traditional fault location methods because the distribution system is no longer radial in nature and is not supplied by a single main power source. This study presents an automated fault location method using Radial Basis Function Neural Network (RBFNN) for a distribution system with DG units. In the proposed method, the fault type is determined first by normalizing the fault currents of the main source. Then to determine the fault location, two RBFNNs have been developed for various fault types. The first RBFNN is used for detraining ...


Joint Feature Selection And Classification For Taxonomic Problems Within Fish Species Complexes, Yixin Chen, Shuqing Huang, Huimin Chen, Henry Bart 2009 University of Mississippi

Joint Feature Selection And Classification For Taxonomic Problems Within Fish Species Complexes, Yixin Chen, Shuqing Huang, Huimin Chen, Henry Bart

Huimin Chen

It is estimated that 90% of the world’s species are yet to be discovered and described. The main reason for the slow pace of new species description is that the science of taxonomy can be very laborious. To formally describe a new species, taxonomists have to manually gather and analyze data from large numbers of specimens and identify the smallest subset of external body characters that uniquely diagnose the new species as distinct from all its known relatives. In this paper, we present an automated feature selection and classification scheme using logistic regression with controlled false discovery rate to ...


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