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175,090 full-text articles. Page 5546 of 5547.

On-Chip Implementation Of High Resolution High Speed Floating Point Adder/Subtractor With Reducing Mean Latency For Ofdm, Rozita Teymourzadeh, Yazan Samir, Nooshin Mahdavi, Masuri Othman 2009 Faculty of Engineering, Technology and Built Environment UCSI University

On-Chip Implementation Of High Resolution High Speed Floating Point Adder/Subtractor With Reducing Mean Latency For Ofdm, Rozita Teymourzadeh, Yazan Samir, Nooshin Mahdavi, Masuri Othman

Dr. Rozita Teymourzadeh, CEng.

Fast Fourier transform (FFT) is widely applied in OFDM trance-receiver communications system. Hence Efficient FFT algorithm is always considered. This paper proposed FPGA realization of high resolution high speed low latency floating point adder/subtractor for FFT in OFDM trance-receiver. The design was implemented for 32 bit pipelined adder/subtractor which satisfied IEEE-754 Standard for floating-point Arithmetic. The design was focused on the trade-off between the latency and speed improvement as well as resolution and silicon area for the chip implementation. In order to reduce the critical path and decrease the latency, the novel structure was designed and investigated. Consequently ...


2009 Report Of Crerg Research Activities, João F. Gomes 2009 Instituto Superior Engenharia Lisboa

2009 Report Of Crerg Research Activities, João F. Gomes

João F Gomes

No abstract provided.


The Tangled Tale Of Phase Space, David D. Nolte 2009 Purdue University

The Tangled Tale Of Phase Space, David D. Nolte

David D Nolte

(Preview of Chapter 6: Galileo Unbound: Oxford 2018) Phase space has been called one of the most powerful inventions of modern science.  But its historical origins are clouded in a tangle of independent discovery and mis-attributions that persist today.  This Physics Today article unravels the twisted tale of the discovery and the naming of phase space that began with Liouville in 1838, but by no means ended there, culminating in an encyclopedia article of 1911 that had unintended and lasting etymological side effects never intended by its authors.


Pricing Residential Water To Account For Scarcity In Cyprus, Theodoros Zachariadis 2009 Cyprus University of Technology

Pricing Residential Water To Account For Scarcity In Cyprus, Theodoros Zachariadis

Theodoros Zachariadis

No abstract provided.


Effect Of Spontaneous Gas Expansion And Mobilization On The Aqueous-Phase Concentrations Above A Dense Non-Aqueous Phase Liquid Pool., Kevin G. Mumford, James Smith, Sarah E. Dickson 2009 Queen's University - Kingston, Ontario

Effect Of Spontaneous Gas Expansion And Mobilization On The Aqueous-Phase Concentrations Above A Dense Non-Aqueous Phase Liquid Pool., Kevin G. Mumford, James Smith, Sarah E. Dickson

Sarah E Dickson

This paper presents a framework to quantify the overall variability of the model estimations of Total Polychlorinated Biphenyls (Total PCBs) concentrations in the Niagara River on the basis of the uncertainty of few model parameters and the natural variability embedded in some of the model input variables. The results of the uncertainty analysis are used to understand the importance of stochastic model components and their effect on the overall reliability of the model output and to evaluate multiple sources of uncertainty that might need to be further studied. The uncertainty analysis is performed using a newly developed point estimate method ...


Upper Bounds On The Number Of Channels To Ensure Collision-Free Communications In Multi-Channel Wireless Networks Using Directional Antennas, Hong-Ning Dai, Kam-Wing Ng, Min-You Wu 2009 Macau University of Science and Technology

Upper Bounds On The Number Of Channels To Ensure Collision-Free Communications In Multi-Channel Wireless Networks Using Directional Antennas, Hong-Ning Dai, Kam-Wing Ng, Min-You Wu

Hong-Ning Dai

Recent studies have found that using multiple channels can separate concurrent transmissions and significantly improve network throughput. However, these studies have only considered wireless nodes that are equipped with omni-directional antennas, which have high interference. On the other hand, other researchers have found that using directional antennas in wireless networks can reduce interference and improve the network performance. But their studies have only considered single channel to be used in wireless networks with directional antennas. Thus, integrating the two technologies of multiple channels and directional antennas together can potentially bring more benefits. Some previous works have studies the capacity on ...


A Simple Method For Thesestimation Of Thermal Insulation Thickness, ali ali 2009 Selected Works

A Simple Method For Thesestimation Of Thermal Insulation Thickness, Ali Ali

ali ali

No abstract provided.


Chemistry Model For Ablating Carbon-Phenolic Material During Atmospheric Re-Entry, Alexandre Martin, Iain D. Boyd, Ioana Cozmuta, Michael J. Wright 2009 University of Michigan - Ann Arbor

Chemistry Model For Ablating Carbon-Phenolic Material During Atmospheric Re-Entry, Alexandre Martin, Iain D. Boyd, Ioana Cozmuta, Michael J. Wright

Alexandre Martin

Recent and future re-entry vehicle designs, such as the CEV, use ablative material as the main component of the heat shield of their thermal protection system. In order to properly predict the behavior of the vehicle, it is imperative to take into account the gases produced by the ablation process when modeling the reacting flow environment. In the case of charring ablators, where an inner resin is pyrolyzed at a relatively low temperature, the composition of the gas expelled in the boundary layer is complex and might lead to thermal chemical reactions that cannot be captured with simple flow chemistry ...


Preliminary Numerical Analysis Of Valve Fatigue In A Checkball Pump For Driveline Applicatio, Yang Yang 2009 Western Michigan University

Preliminary Numerical Analysis Of Valve Fatigue In A Checkball Pump For Driveline Applicatio, Yang Yang

Yang Yang

Recent studies have shown that hydraulic hybrid drivelines can significantly improve fuel savings for medium weight vehicles on stop-start drivecycles. In a series hydraulic hybrid (SHH) architecture, the conventional mechanical driveline is replaced with a hydraulic driveline that decouples vehicle speed from engine speed. In an effort to increase the design space, this paper explores the use of a fixed displacement check-ball piston pump in an SHH driveline. This paper identifies the potential life-limiting components of a fixed-displacement checkball piston pump and examines the likelihood of surface fatigue in the check valves themselves. Numerical analysis in ABAQUS software suggests that ...


Controlled Language - Does My Company Need It?, Uwe Muegge 2009 Selected Works

Controlled Language - Does My Company Need It?, Uwe Muegge

Uwe Muegge

A controlled language is a natural language, as opposed to an artificial or constructed language. Natural languages such as English or German are languages that are used by humans for general communication. A controlled language differs from the general language in two significant ways: 1. The grammar rules of a controlled language are typically more restrictive than those of the general language. 2. The vocabulary of a controlled language typically contains only a fraction of the words that are permissible in the general language.


A Short Method For The Design Of Reactive Distillation Column, Marcelino Carrera-Rodriguez, Juan Gabriel Segovia-Hernandez, Adrian Bonilla-Petriciolet 2009 Universidad de Guanajuato

A Short Method For The Design Of Reactive Distillation Column, Marcelino Carrera-Rodriguez, Juan Gabriel Segovia-Hernandez, Adrian Bonilla-Petriciolet

Adrian Bonilla-Petriciolet

In this study, a short method for the design of reactive distillation is presented. The method is based on distillation lines and tray-by-tray calculations, and a new strategy is suggested to locate the reflux ratio, the number of stages, and feed tray. The material balances are solved from the outside (top and bottom) to the inside of the distillation column (feed), to ensure that the product compositions are met. To reduce the numerical difficulties, the method is based on the application of reaction-invariant composition variables. The synthesis of MTBE with the presence of inert is used as case of study ...


Carbon Accounting Initiatives: Case Study Of A Petroleum Refinery In Malaysia To Prepare For Future Carbon Market, Abdul Aziz Abdul Raman 2009 University of Malaya

Carbon Accounting Initiatives: Case Study Of A Petroleum Refinery In Malaysia To Prepare For Future Carbon Market, Abdul Aziz Abdul Raman

Abdul Aziz Abdul Raman

Petroleum refining process produces a large amount of atmospheric pollutants including greenhouse gases which are attributed to global warming. The international community inevitably addressed the global warming issue by introducing a market-based mechanism known as Emission Trading Systems (ETS) under the Kyoto Protocol which imposes binding limits to developed nations using three flexibility mechanisms, including the Clean Development Mechanism (CDM). © School of Engineering, Taylor's University College.


Degradation Of Organic Pollutants In Domestic Wastewaters By Concrete Plates Containing Of Photocatalyst Nanoparticles, Masoud Rastegar 2009 Selected Works

Degradation Of Organic Pollutants In Domestic Wastewaters By Concrete Plates Containing Of Photocatalyst Nanoparticles, Masoud Rastegar

Masoud Rastegar

No abstract provided.


Airport Wildlife Hazard Control, Paul F. Eschenfelder 2009 Embry Riddle Aeronautical University - Daytona Beach

Airport Wildlife Hazard Control, Paul F. Eschenfelder

Paul F. Eschenfelder

No abstract provided.


Comparison Of Mechanical And Bond Properties Of Oil Palm Kernel Shell Concrete With Normal Weight Concrete, Zamin Jumaat 2009 Department of Civil Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA

Comparison Of Mechanical And Bond Properties Of Oil Palm Kernel Shell Concrete With Normal Weight Concrete, Zamin Jumaat

Zamin Jumaat

The comparison of the fresh, mechanical and bond properties of grade 30 lightweight concrete, namely oil palm kernel shell concrete (OPKSC) with normal weight concrete (NWC) of similar strength is presented in this paper. Oil palm kernel shell (OPKS), an industrial waste has been used as lightweight aggregates (LWA) in the OPKSC. In addition, mineral admixtures, 10% of silica fume and 5% fly ash have been used. The OPKSC produced a density reduction of about 20% compared to NWC. The addition of silica fume enhanced the compressive strength and thus OPKSC produced 28-day compressive strength up to 37 MPa. The ...


Toxicological Assessment Of Coated Versus Uncoated Rubber Granulates Obtained From Used Tires For Use In Sport Facilities, João F. Gomes 2009 Instituto Superior Engenharia Lisboa

Toxicological Assessment Of Coated Versus Uncoated Rubber Granulates Obtained From Used Tires For Use In Sport Facilities, João F. Gomes

João F Gomes

Reuse of tire crumb in sport facilities is currently a very cost-effective waste management measure. Considering that incorporation of the waste materials in artificial turf would be facilitated if the rubber materials were already colored green, coatings were specifically developed for this purpose. This paper presents an experimental toxicological and environmental assessment aimed at comparing the obtained emissions to the environment in terms of polycyclic aromatic hydrocarbons (PAHs), heavy metals, and ecotoxicity for coated and noncoated rubber granulates. This study is a comprehensive evaluation of the major potential critical factors related with the release of all of these classes of ...


Diagnosing Intermittent And Persistent Faults Using Static Bayesian Networks, Ole J. Mengshoel, Brian Ricks 2009 Carnegie Mellon University

Diagnosing Intermittent And Persistent Faults Using Static Bayesian Networks, Ole J. Mengshoel, Brian Ricks

Ole J Mengshoel

Both intermittent and persistent faults may occur in a wide range of systems. We present in this paper the introduction of intermittent fault handling techniques into ProDiagnose, an algorithm that previously only handled persistent faults. We discuss novel algorithmic techniques as well as how our static Bayesian networks help diagnose, in an integrated manner, a range of intermittent and persistent faults. Through experiments with data from the ADAPT electrical power system test bed, generated as part of the Second International Diagnostic Competition (DXC-10), we show that this novel variant of ProDiagnose diagnoses intermittent faults accurately and quickly, while maintaining strong ...


Fourth Year Collaboratory 2010, Thomas Fowler IV 2009 Cal Poly State University, San Luis Obispo, CA

Fourth Year Collaboratory 2010, Thomas Fowler Iv

Thomas Fowler IV, DPACSA, FAIA

Since the 2007/2008 academic year, this interdisciplinary design studio called the Design Collaboratory has been co taught by four faculty members building upon the successful 46-year multi-disciplinary experience of this academic institution cultivating innovative models of practice through an integrated architecture and architectural engineering design studio. This team of professors, with over 40 years of collective cross disciplinary collaborative experience, and students from Architecture and Architectural Engineering Departments participate in a 20-week design studio.

The Design Collaboratory provides for an intensive two-quarter course sequence designed to familiarize undergraduate students with practiced based knowledge and application for how interdisciplinary teams ...


Ss-Dna Functionalized Ultra-Thin-Film Aln Contour-Mode Resonators With Self-Sustained Oscillator For Volatile Organic Chemical Detection, Matteo Rinaldi, Brandon Duick, Chiara Zuniga, Chengjie Zuo, Gianluca Piazza 2009 University of Pennsylvania

Ss-Dna Functionalized Ultra-Thin-Film Aln Contour-Mode Resonators With Self-Sustained Oscillator For Volatile Organic Chemical Detection, Matteo Rinaldi, Brandon Duick, Chiara Zuniga, Chengjie Zuo, Gianluca Piazza

Matteo Rinaldi

This paper reports on the design and experimental verification of a new class of nanoscale gravimetric sensors based on ultra-thin-film AlN Contour-Mode Resonant Sensor (CMR-S) functionalized with ss-DNA and connected to a chip-based self-sustaining oscillator loop (fabricated in the ON Semiconductor 0.5 μm CMOS process) for direct frequency read-out. The 220 MHz oscillator based on the ultra-thin AlN CMR-S exhibits an Allan Variance of ∼20 Hz for 100 ms gate time. The sensor affinity for the adsorption of volatile organic chemicals such as 2,6 dinitroluene (DNT, a simulant for explosive vapors) is enhanced by functionalizing the top gold ...


Determining Of Substrate Materials' Effects On Color Gamut Used In Digital Printing System / Dijital Baskı Sisteminde Kullanılan Baskıaltı Malzemelerinin Renk Evrenine Etkisinin Tespiti, Bilge N. Altay 2009 Western Michigan University

Determining Of Substrate Materials' Effects On Color Gamut Used In Digital Printing System / Dijital Baskı Sisteminde Kullanılan Baskıaltı Malzemelerinin Renk Evrenine Etkisinin Tespiti, Bilge N. Altay

Bilge Nazli Altay

Baskı endüstrisi, son 15 yıldır radikal bir değişimle karşı karşıyadır. Tüm endüstri alanları, müşterilerin işlerini en düşük fiyatta ve istedikleri zaman elde etme taleplerinden etkilenmektedir. Baskı endüstrisine bakıldığında bu ihtiyaçlar, dijital baskı teknolojileri tarafından karşılanmaktadır. İsteğe ve kişiye özel ürünlere olan talep, baskı endüstrisinin geleceğini değiştirmektedir. Dijital baskı, bu talebi karşılayan teknolojidir.#11;Dijital baskı makinelerinde, işin özelliğine bağlı olarak karbonsuz, parlak kuşe, mat kuşe, dokulu ve kuşelenmemiş kağıtlar kullanılabilir. İstenen iş elektrofotografik, inkjet, manyetografik, iyonografik veya termografik dijital baskı teknolojilerinden birinde basılabilir.#11;Bu çalışmanın ilk bölümünde tez çalışması hakkında genel bilgiler verilmiş ve tezin amacı açıklanmıştır. İkinci bölümde ...


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