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Efficient General Computational Method For Estimation Of Standard Atmosphere Parameters, Nihad E. Daidzic Ph.D., Sc.D. 2019 AAR Aerospace Consulting, LLC

Efficient General Computational Method For Estimation Of Standard Atmosphere Parameters, Nihad E. Daidzic Ph.D., Sc.D.

Nihad E. Daidzic, Dr.-Ing., D.Sc., ATP, CFII, MEI

Knowledge of standard air temperature, pressure, density, speed of sound, and viscosity as a function of altitude is essential information in aircraft design, performance testing, pressure altimeter calibration, and several other aeronautical engineering and aviation science applications. A new efficient computational method for rapid calculations of standard atmospheric parameters up to 86 orthometric km is presented. Additionally, mass and weight of each standard atmospheric layer were calculated using a numerical integration method. The sum of all fractional masses and weights represents the total mass and weight of Earth’s atmosphere. The results obtained here agree well with measurements and models ...


Achieving Global Range In Future Subsonic And Supersonic Airplanes, Nihad E. Daidzic Ph.D., Sc.D. 2019 AAR Aerospace Consulting, LLC

Achieving Global Range In Future Subsonic And Supersonic Airplanes, Nihad E. Daidzic Ph.D., Sc.D.

Nihad E. Daidzic, Dr.-Ing., D.Sc., ATP, CFII, MEI

No commercial airplane in service today is able to fly half great-circle distances over the globe and achieve the non-stop or the global range to any antipodal location on Earth. A subsonic jetliner has the optimum cruising speed at Mach numbers approaching the drag divergence Mach number while still preserving relatively high aerodynamic efficiency. Various fuel-flow laws were used to investigate the cruise performance of subsonic and supersonic aircraft. The effect of wind and aircraft weight and how it affects the optimal cruising airspeed was investigated. Of all different operational cruising techniques, the cruise-climb at high Mach numbers is the ...


Design Of Dc-Link Vscf Ac Electrical Power System For The Embraer 190/195 Aircraft, Eduardo Francis Carvalho Freitas, Nihad E. Daidzic 2019 ETEP – Faculdade de Tecnologia de São José dos Campos, Brazil

Design Of Dc-Link Vscf Ac Electrical Power System For The Embraer 190/195 Aircraft, Eduardo Francis Carvalho Freitas, Nihad E. Daidzic

Nihad E. Daidzic, Dr.-Ing., D.Sc., ATP, CFII, MEI

A proposed novel DC-Link VSCF AC-DC-AC electrical power system converter for Embraer 190/195 transport category airplane is presented. The proposed converter could replace the existing conventional system based on the CSCF IDGs. Several contemporary production airplanes already have VSCF as a major or backup source of electrical power. Problems existed with the older VSCF systems in the past; however, the switched power electronics and digital controllers have matured and can be now, in our opinion, safely integrated and replace existing constant-speed hydraulic transmissions powering CSCF AC generators. IGBT power transistors for medium-level power conversion and relatively fast efficient switching ...


Determination Of Rejected Landing Roll Runway Point-Of-No-Return And Go-Around In Transport Category Airplanes, Nihad E. Daidzic, Ph.D., Sc.D. 2019 AAR Aerospace Consulting, LLC

Determination Of Rejected Landing Roll Runway Point-Of-No-Return And Go-Around In Transport Category Airplanes, Nihad E. Daidzic, Ph.D., Sc.D.

Nihad E. Daidzic, Dr.-Ing., D.Sc., ATP, CFII, MEI

The decelerate-accelerate-takeoff maneuver in transport category airplanes has been discussed. Mathematical model based on total energy conservation has been used to calculate the rejected landing point-of-no-return on a runway which will still enable the airplane to safely execute go-around and achieve regulatory screen heights and takeoff safety speeds. After this point has been exceeded or below the point-of-no-return speed no go-around should ever be considered. Landing long and fast and/or decelerating on slippery runways may very well result in an overrun which could be prevented if the go-around is attempted before reaching this critical runway point. The point-of-no-return on ...


A Contribution Toward Better Understanding Of Overbanking Tendency In Fixed-Wing Aircraft, Nihad E. Daidzic 2019 AAR Aerospace Consulting, LLC

A Contribution Toward Better Understanding Of Overbanking Tendency In Fixed-Wing Aircraft, Nihad E. Daidzic

Nihad E. Daidzic, Dr.-Ing., D.Sc., ATP, CFII, MEI

The phenomenon of overbanking tendency for a rigid-body, fixed-wing aircraft is investigated. Overbanking tendency is defined as a spontaneous, unbalanced rolling moment that keeps increasing an airplane’s bank angle in steep turns and must be arrested by opposite aileron action. As stated by the Federal Aviation Administration, the overbanking tendency may lead to a loss of control, especially in instrument meteorological conditions. It was found in this study that the speed differential over wing halves in horizontal turns indeed creates a rolling moment that achieves maximum values for bank angles between 45 and 55 degrees. However, this induced rolling ...


Reimagining Icarus: Ethics, Law And Policy Considerations For Commercial Human Spaceflight, Sara M. Langston 2019 Senmurv Consulting LLC

Reimagining Icarus: Ethics, Law And Policy Considerations For Commercial Human Spaceflight, Sara M. Langston

Sara Langston

Commercial human spaceflight presents an area for engaging novel human activity and objectives, to include space exploration, entertainment, transportation and extraterrestrial resource acquisition. The inherent dangers and lack of scientific and medical certainty involved however raise interrelated questions of ethics, bioethics, law and public policy. This is particularly the case with spaceflight participant (SFP) screening, selection, and commercial human spaceflight activities where regulations are currently silent or lacking. In the absence of established law, ethics can play an important role by informing industry standards, policies and best practices. Understanding the fundamental ethical values at stake in the application of new ...


Fluid Transport In Porous Media For Engineering Applications, Eric M. Benner 2019 University of New Mexico

Fluid Transport In Porous Media For Engineering Applications, Eric M. Benner

Chemical and Biological Engineering ETDs

This doctoral dissertation presents three topics in modeling fluid transport through porous media used in engineering applications. The results provide insights into the design of fuel cell components, catalyst and drug delivery particles, and aluminum- based materials. Analytical and computational methods are utilized for the modeling of the systems of interest. Theoretical analysis of capillary-driven transport in porous media show that both geometric and evaporation effects significantly change the time dependent behavior of liquid imbibition and give a steady state flux into the medium. The evaporation–capillary number is significant in determining the time-dependent behavior of capillary flows in porous ...


Self-Driving Cars: Evaluation Of Deep Learning Techniques For Object Detection In Different Driving Conditions, Ramesh Simhambhatla, Kevin Okiah, Shravan Kuchkula, Robert Slater 2019 SMU

Self-Driving Cars: Evaluation Of Deep Learning Techniques For Object Detection In Different Driving Conditions, Ramesh Simhambhatla, Kevin Okiah, Shravan Kuchkula, Robert Slater

SMU Data Science Review

Deep Learning has revolutionized Computer Vision, and it is the core technology behind capabilities of a self-driving car. Convolutional Neural Networks (CNNs) are at the heart of this deep learning revolution for improving the task of object detection. A number of successful object detection systems have been proposed in recent years that are based on CNNs. In this paper, an empirical evaluation of three recent meta-architectures: SSD (Single Shot multi-box Detector), R-CNN (Region-based CNN) and R-FCN (Region-based Fully Convolutional Networks) was conducted to measure how fast and accurate they are in identifying objects on the road, such as vehicles, pedestrians ...


Returns On Library Investment: A Study Of The Leading Engineering And Technology Institutes In India, Shivendra Singh, Ramesh Pandita Mr. 2019 All India Institute of Medical Sciences, Patna, India

Returns On Library Investment: A Study Of The Leading Engineering And Technology Institutes In India, Shivendra Singh, Ramesh Pandita Mr.

Library Philosophy and Practice (e-journal)

The study is based on the secondary data compiled by the Ministry of Human Resource & Development, Govt., of India for the period 2012-13, 2013-14 & 2014-15 and was released as the ranking list of Institutes of Engineering and Technology in India for the year 2016. The study aims to assess the Returns on Investment (ROI) of the twenty leading libraries of the Institutes of Engineering and Technology in India in the form of institutional research output. An attempted has also been made to rank the each individual library on the basis of seven different parameters chosen for the study and worked ...


A Sophomore Level Introduction To Engineering Design Course, Norman Muzzy, Michelle L. Soupir, Steven J. Hoff 2019 Iowa State University

A Sophomore Level Introduction To Engineering Design Course, Norman Muzzy, Michelle L. Soupir, Steven J. Hoff

Norman Muzzy

Iowa State University has a sophomore level course that is known as ABE 218. The objectives of this course include learning a structured approach to engineering design, preparing the students for internships, learning the basics of project management, and connecting the theoretical engineering paper designs to physical reality. This informal paper discusses how the course is structured, identifies the lab projects that are part of the course, and discusses some of the results and challenges associated with ABE 218.


Applying What You Have Learned, Gretchen Mosher, Norman Muzzy, Dana Woolley 2019 Iowa State University

Applying What You Have Learned, Gretchen Mosher, Norman Muzzy, Dana Woolley

Norman Muzzy

Last April, a group of over 110 students presented their Capstone projects in the Department of Agricultural and Biosystems Engineering at Iowa State University. The Capstone program serves students in engineering and technology and is a required component of all ABE undergraduates. Capstone programs in engineering and technology are divided into two phases: a first-semester focus on defining the scope of the problem, and an emphasis on solution development and evaluation in the second semester. At the end of the first semester, the teams present their accomplishments at a poster session, where they receive feedback from ABE faculty and industry ...


Global Validation Of Columnar Water Vapor Derived From Eos Modis-Maiac Algorithm Against The Ground-Based Aeronet Observations, Vitor S. Martins, Alexei Lyapustin, Yujie Wang, David M. Giles, Alexander Smirnov, Ilya Slutsker, Sergey Korkin 2019 Iowa State University

Global Validation Of Columnar Water Vapor Derived From Eos Modis-Maiac Algorithm Against The Ground-Based Aeronet Observations, Vitor S. Martins, Alexei Lyapustin, Yujie Wang, David M. Giles, Alexander Smirnov, Ilya Slutsker, Sergey Korkin

Vitor Martins

The water vapor is a relevant greenhouse gas in the Earth's climate system, and satellite products become one of the most effective way to characterize and monitor the columnar water vapor (CWV) content at global scale. Recently, a new product (MCD19) was released as part of MODIS (Moderate Resolution Imaging Spectroradiometer) Collection 6 (C6). This operational product from Multi-Angle Implementation for Atmospheric Correction (MAIAC) algorithm includes a high 1 km resolution CWV retrievals. This study presents the first global validation of MAIAC C6 CWV obtained from MODIS MCD19A2 product. This evaluation was performed using Aerosol Robotic Network (AERONET) observations ...


Validation Of High‐Resolution Maiac Aerosol Product Over South America, Vitor S. Martins, Alexei Lyapustin, Lino A.S. de Carvalho, Claudio C.F. Barbosa, Evlyn M.L.M. Novo 2019 Iowa State University

Validation Of High‐Resolution Maiac Aerosol Product Over South America, Vitor S. Martins, Alexei Lyapustin, Lino A.S. De Carvalho, Claudio C.F. Barbosa, Evlyn M.L.M. Novo

Vitor Martins

Moderate Resolution Imaging Spectroradiometer (MODIS) algorithm that combines time series approach and image processing to derive surface reflectance and atmosphere products, such as aerosol optical depth (AOD) and columnar water vapor (CWV). The quality assessment of MAIAC AOD at 1 km resolution is still lacking across South America. In the present study, critical assessment of MAIAC AOD550 was performed using ground‐truth data from 19 Aerosol Robotic Network (AERONET) sites over South America. Additionally, we validated the MAIAC CWV retrievals using the same AERONET sites. In general, MAIAC AOD Terra/Aqua retrievals show high agreement with ground‐based measurements, with ...


Seasonal And Interannual Assessment Of Cloud Cover And Atmospheric Constituents Across The Amazon (2000–2015): Insights For Remote Sensing And Climate Analysis, Vitor S. Martins, Evlyn M.L.M. Novo, Alexei Lyapustin, Luiz E.O.C. Aragão, Saulo R. Freitas, Claudio C.F. Barbosa 2019 Iowa State University

Seasonal And Interannual Assessment Of Cloud Cover And Atmospheric Constituents Across The Amazon (2000–2015): Insights For Remote Sensing And Climate Analysis, Vitor S. Martins, Evlyn M.L.M. Novo, Alexei Lyapustin, Luiz E.O.C. Aragão, Saulo R. Freitas, Claudio C.F. Barbosa

Vitor Martins

The quantitative assessment of cloud cover and atmospheric constituents improves our ability to exploit the climate feedback into the Amazon basin. In the 21st century, three droughts have already occurred in the Amazonia (e.g. 2005, 2010, 2015), inducing regional changes in the seasonal patterns of atmospheric constituents. In addition to climate, the atmospheric dynamic and attenuation properties are long-term challenges for satellite-based remote sensing of this ecosystem: high cloudiness, abundant water vapor content and biomass burning season. Therefore, while climatology analysis supports the understanding of atmospheric variability and trends, it also offers valuable insights for remote sensing applications. In ...


Observation Of Η-Al41sm5 Reveals Motif-Aware Structural Evolution In Al-Sm Alloys, Zhuo Ye, F. Meng, Feng Zhang, Yang Sun, L. Yang, S. H. Zhou, Ralph E. Napolitano, Mikhail I. Mendelev, Ryan T. Ott, Matthew J. Kramer, Cai-Zhuang Wang, Kai-Ming Ho 2019 Ames Laboratory

Observation Of Η-Al41sm5 Reveals Motif-Aware Structural Evolution In Al-Sm Alloys, Zhuo Ye, F. Meng, Feng Zhang, Yang Sun, L. Yang, S. H. Zhou, Ralph E. Napolitano, Mikhail I. Mendelev, Ryan T. Ott, Matthew J. Kramer, Cai-Zhuang Wang, Kai-Ming Ho

Ralph E. Napolitano

Using an effective genetic algorithm, we uncover the structure of a metastable Al41Sm5 phase that supplements its family sharing similar short-range orders. The phase evolves upon heating an amorphous Al-9.7 at.% Sm ribbon, produced by melt-spinning. The dynamical phase selection is discussed with respect to the structural connections between the short-range packing motifs in the amorphous precursor and those observed in the selected phases. The phase elucidated here is one of several newly discovered large-unit-cell phases found to form during devitrification from the glass in this binary system, further illustrating the power and efficiency of our approach, the important ...


Alamat Toko Jual Obat Supremasi Di Mojokerto (0821–3298–7772), supremasi surabaya 2019 University of California, San Francisco

Alamat Toko Jual Obat Supremasi Di Mojokerto (0821–3298–7772), Supremasi Surabaya

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Alamat Toko Jual Obat Supremasi Di Bekasi (0821–3298–7772) Bisa Cod, supremasi surabaya 2019 University of California, San Francisco

Alamat Toko Jual Obat Supremasi Di Bekasi (0821–3298–7772) Bisa Cod, Supremasi Surabaya

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Agen Jual Obat Suprememasi Asli Di Cikarang (0821–3298–7772), supremasi surabaya 2019 University of California, San Francisco

Agen Jual Obat Suprememasi Asli Di Cikarang (0821–3298–7772), Supremasi Surabaya

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Alamat Toko Jual Obat Supremasi Di Gresik (0821–3298–7772), supremasi surabaya 2019 University of California, San Francisco

Alamat Toko Jual Obat Supremasi Di Gresik (0821–3298–7772), Supremasi Surabaya

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Alamat Toko Jual Obat Supremasi Di Malang (0821–3298–7772) Bisa Cod, supremasi surabaya 2019 University of California, San Francisco

Alamat Toko Jual Obat Supremasi Di Malang (0821–3298–7772) Bisa Cod, Supremasi Surabaya

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