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Trachet, Madireddy_2009
The report summarizes a literature study conducted to identify suitable emission and noise models to estimate the impact of traffic management strategies. It evaluates several American and European models and determines that the Versit+ model is best suited as it can predict emissions for different pollutants, is based on a large validated database, and is commercially available and easy to use. Initial tests coupling Versit+ with a micro-traffic simulation model showed promising results in accurately estimating emissions under different traffic conditions.
Noise Reduction
This document summarizes studies on using urban traffic management to reduce noise pollution. Some key findings include:
- Speed humps can reduce noise by 1-2 dB(A) but also increase it by 2-3 dB(A) near the humps due to braking and acceleration.
- Reducing road widths can lower noise by 1-3 dB(A), especially combined with other measures.
- Intersections are typically penalized by 0-3 dB(A) in noise models due to stop-and-go traffic. Coordinating traffic lights or using roundabouts can reduce noise by 1-2 dB(A).
- Lowering speed limits from 50 to 30 km/h decreases
Recommended
Trachet, Madireddy_2009
The report summarizes a literature study conducted to identify suitable emission and noise models to estimate the impact of traffic management strategies. It evaluates several American and European models and determines that the Versit+ model is best suited as it can predict emissions for different pollutants, is based on a large validated database, and is commercially available and easy to use. Initial tests coupling Versit+ with a micro-traffic simulation model showed promising results in accurately estimating emissions under different traffic conditions.
Noise Reduction
This document summarizes studies on using urban traffic management to reduce noise pollution. Some key findings include:
- Speed humps can reduce noise by 1-2 dB(A) but also increase it by 2-3 dB(A) near the humps due to braking and acceleration.
- Reducing road widths can lower noise by 1-3 dB(A), especially combined with other measures.
- Intersections are typically penalized by 0-3 dB(A) in noise models due to stop-and-go traffic. Coordinating traffic lights or using roundabouts can reduce noise by 1-2 dB(A).
- Lowering speed limits from 50 to 30 km/h decreases
EcologicalEconomics
The document discusses sustainability and consumerism. It argues that modern economies are unsustainable because they treat non-renewable natural resources as income rather than capital. Consumerism has failed to provide fulfillment and instead harms the environment. Ultimately, curtailing consumption of ecologically destructive goods and cultivating non-material sources of happiness can help balance human and environmental well-being.
9. FFT,IFFT Paper
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
10.Atmospheric Emissions Inventory (AJCC)
This document provides emissions data from chassis dynamometer testing of five 2003-2005 model year heavy-duty trucks. Carbon dioxide (CO2) emissions were found to correlate well with dispersed axle power, with an R2 of 0.86. Nitrogen oxides (NOx) emissions did not correlate as well with power, with an R2 of only 0.53, due to increasingly complex engine emissions controls affecting the linear dependence of NOx on power. The average ratio of NOx to CO2 emissions for the 2003-2005 model year trucks was found to be 0.0051, agreeing reasonably well with estimated certification standards, and lower than the average ratio of 0.0141 found for 1994-2002 model year
8. Reconstruction Methods
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
7. Novel Technique
This document presents a new technique called the Modified Deconvolution Technique (MDT) to reconstruct instantaneous heavy duty vehicle emissions from measured data. MDT models the emissions analyzer system using a gamma probability density function to account for time dispersion effects. It uses fast Fourier transforms to divide the analyzer output signal by the impulse response function to estimate the original instantaneous emissions signal. The technique was tested on emissions data from a transit bus and showed improved correlation between reconstructed emissions and engine power compared to an earlier Differential Coefficients Method. The new technique provides a more accurate way to relate emissions to operating conditions like vehicle speed and acceleration.
3. Enhance DCM
The document discusses methods to improve the accuracy of reconstructing transient emissions measurements from heavy-duty vehicles. It examines using higher order derivatives and different numerical differentiation methods in the differential coefficients method. Using backward differences for numerical differentiation and including higher order derivatives improved the reconstruction accuracy by about 10% compared to just the first two derivatives. This margin of improved accuracy may be important for model accuracy or assessing emissions criteria compliance.
2. SIT,DCM
The sequential inversion technique (SIT) and differential coefficients method (DCM) are two methods discussed to reconstruct true transient emission signals from measurements taken by analyzers, which introduce delays and dispersion. The SIT reconstructs the input second by second based on the measured response and dispersion characteristics. Testing with real data showed it can accurately reconstruct signals without noise. However, reconstruction fails if the dispersion characteristics change or there is signal noise. The DCM defines the real input as a linear combination of the output and its derivatives. It was more accurate than SIT when noise was present. Both methods aim to compensate for measurement delays and dispersion to obtain instantaneous emissions from analyzer readings.
Synopsis of HFC
The document summarizes Thomas L. Friedman's book "Hot, Flat and Crowded" which discusses how the world is getting hotter, flatter, and more crowded due to increasing population and technology. This is resulting in a growing demand for energy, a transfer of wealth to oil-rich nations, climate change, energy poverty, and loss of biodiversity. The book proposes a "Code-Green" action plan to generate clean, cheap, and abundant energy through various scientific solutions.
HOT, FLAT and CROWDED
This document summarizes Thomas Friedman's book "Hot, Flat, and Crowded" which addresses the major energy, climate, and environmental challenges facing the world. It diagnoses trends of increasing energy demand, climate change impacts, and a growing global population that is putting pressure on natural resources. The document outlines five key problems, and discusses how transitioning to renewable energy and reducing fossil fuel dependence can help address these issues and lift people out of energy poverty.
6. Assessment of impact of speed limit reduction and traffic signal
1. The study examines the effects of reducing speed limits from 50 km/h to 30 km/h in a residential area of Antwerp, Belgium and implementing coordinated traffic signals along a major road using microscopic traffic simulation and an emissions model.
2. Reducing speed limits in the residential area was found to reduce CO2 and NOx emissions by about 25%. Implementing coordinated traffic signals was found to reduce emissions by about 10%.
3. The integrated model combines microscopic traffic simulation to model vehicle behavior with an emissions model to estimate pollutants based on vehicle speeds and accelerations from the simulation. This allows assessment of traffic management measures on local air pollution.
5. Microsimulation of Traffic
This study used micro-simulation traffic modeling (Paramics) coupled with an emissions prediction model (Versit+) to examine the impact of two traffic management schemes on vehicle emissions in Antwerp, Belgium. Reducing the network speed limit was found to decrease CO2 emissions by 23-41% and NOx and PM by 27-45%, while removing green wave traffic signal coordination increased emissions by around 10%. The models provided an effective way to evaluate potential traffic and air quality impacts of management strategies at a network level.
4. CombinedAssessment
This document summarizes a study that developed a model to assess the combined impacts of road traffic on noise and air pollution. The model combines microscopic traffic simulation with emission models for noise and air pollutants. The model was applied to a case study area in Belgium. Three scenarios were examined: the current situation with synchronized traffic lights, an unsynchronized light scenario, and a reduced speed limit scenario with synchronized lights. The results allow investigation of how traffic management measures influence emissions and provide guidance for urban planning.
Rational Revolution
This document discusses rationality and making rational decisions. It argues that people often make irrational decisions due to errors in estimating the value and effort of seeking something and due to caring too much about social acceptance and what others think. Some key points made include that happiness is similar in most circumstances because people can synthesize happiness from friends, family, purpose and health. The document advocates making rational financial decisions based on accurate probability and value estimates rather than media influences, and embracing minimalism to maximize happiness from possessions.
Brochure
Dr. Madhava runs Logic Academy, an educational institution located in Hyderabad, India. The academy offers intensive SAT, PSAT, and SAT Subject test preparation courses that are 3 months long and involve lectures, practice tests, and individual feedback sessions. Dr. Madhava employs effective learning tools like visual cues and simulation software to help students understand concepts and retain information. He has a PhD in Engineering from the USA and experience teaching Mathematics, Physics, and English.
Reasoning Course 14 weeks
Dr. Madhava's Logic Academy offers mathematical aptitude and logical reasoning classes. The purpose is to keep students' natural curiosity alive and develop their imagination and creativity. The classes focus on applying what students already know to solve problems, rather than teaching new formulas. Sample questions require using concepts like number systems, geometry, and algebra to solve problems involving rectangles, tents and kids, even and odd numbers, and finding the shortest path for a bug. The target age is 12-14 years old in grades 7-9. Students must pass a screening test to be enrolled in the 15-week courses meeting on Wednesdays, Fridays, Sundays, Tuesdays and Thursdays starting in September 2016.
Report on Institutional Collaboration
The document reports on a task force visit to several Ethiopian universities to share experiences on institutional collaboration. The task force visited Jimma Institute of Technology, Addis Ababa Institute of Technology, Addis Ababa Science and Technology University, and Adama Institute of Technology. They learned about collaboration activities including faculty exchange programs, research partnerships, community projects, internship programs, and administrative practices. The universities have both national and international collaborations with industry, government, other universities, and research institutions to strengthen their academic and research capabilities.
Industry LInkages
This document provides a proposal on developing industrial linkages for the College of Engineering & Technology at Dilla University. It begins with background on the university, including its vision, mission, goals and objectives. It then discusses the specific college, providing its vision and mission.
The proposal aims to establish linkages between the college and relevant industries, universities, technical and vocational education and training programs, and local governments. It outlines general and specific objectives for each type of linkage. An action plan with timeline and resource needs is also included to implement the linkages. The document concludes with a budget justification section.
Numerical methods notes
This document contains chapter summaries for mathematical modeling, approximations and round-off errors, Gauss elimination, and LU decomposition & matrix inversion. The chapter on Gauss elimination describes a technique for solving simultaneous linear algebraic equations by combining equations to eliminate unknowns. It remains an important algorithm today and is the basis for linear equation solving in popular software packages.
MS1-Lecture Notes
This document outlines lecture notes on engineering materials covering topics like atomic structure, crystalline structure, defects in crystals, deformation in solids, failure and fracture mechanisms, mechanical properties including tensile, compressive, and torsional strength, and phase transformations. Key chapters discuss valency, defects in crystals, deformation through slip, failure causes, stress-strain curves, fatigue strength, and phase diagrams of alloy systems.
More Related Content
More from Dr, Madhava Madireddy
EcologicalEconomics
The document discusses sustainability and consumerism. It argues that modern economies are unsustainable because they treat non-renewable natural resources as income rather than capital. Consumerism has failed to provide fulfillment and instead harms the environment. Ultimately, curtailing consumption of ecologically destructive goods and cultivating non-material sources of happiness can help balance human and environmental well-being.
9. FFT,IFFT Paper
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
10.Atmospheric Emissions Inventory (AJCC)
This document provides emissions data from chassis dynamometer testing of five 2003-2005 model year heavy-duty trucks. Carbon dioxide (CO2) emissions were found to correlate well with dispersed axle power, with an R2 of 0.86. Nitrogen oxides (NOx) emissions did not correlate as well with power, with an R2 of only 0.53, due to increasingly complex engine emissions controls affecting the linear dependence of NOx on power. The average ratio of NOx to CO2 emissions for the 2003-2005 model year trucks was found to be 0.0051, agreeing reasonably well with estimated certification standards, and lower than the average ratio of 0.0141 found for 1994-2002 model year
8. Reconstruction Methods
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
7. Novel Technique
This document presents a new technique called the Modified Deconvolution Technique (MDT) to reconstruct instantaneous heavy duty vehicle emissions from measured data. MDT models the emissions analyzer system using a gamma probability density function to account for time dispersion effects. It uses fast Fourier transforms to divide the analyzer output signal by the impulse response function to estimate the original instantaneous emissions signal. The technique was tested on emissions data from a transit bus and showed improved correlation between reconstructed emissions and engine power compared to an earlier Differential Coefficients Method. The new technique provides a more accurate way to relate emissions to operating conditions like vehicle speed and acceleration.
3. Enhance DCM
The document discusses methods to improve the accuracy of reconstructing transient emissions measurements from heavy-duty vehicles. It examines using higher order derivatives and different numerical differentiation methods in the differential coefficients method. Using backward differences for numerical differentiation and including higher order derivatives improved the reconstruction accuracy by about 10% compared to just the first two derivatives. This margin of improved accuracy may be important for model accuracy or assessing emissions criteria compliance.
2. SIT,DCM
The sequential inversion technique (SIT) and differential coefficients method (DCM) are two methods discussed to reconstruct true transient emission signals from measurements taken by analyzers, which introduce delays and dispersion. The SIT reconstructs the input second by second based on the measured response and dispersion characteristics. Testing with real data showed it can accurately reconstruct signals without noise. However, reconstruction fails if the dispersion characteristics change or there is signal noise. The DCM defines the real input as a linear combination of the output and its derivatives. It was more accurate than SIT when noise was present. Both methods aim to compensate for measurement delays and dispersion to obtain instantaneous emissions from analyzer readings.
Synopsis of HFC
The document summarizes Thomas L. Friedman's book "Hot, Flat and Crowded" which discusses how the world is getting hotter, flatter, and more crowded due to increasing population and technology. This is resulting in a growing demand for energy, a transfer of wealth to oil-rich nations, climate change, energy poverty, and loss of biodiversity. The book proposes a "Code-Green" action plan to generate clean, cheap, and abundant energy through various scientific solutions.
HOT, FLAT and CROWDED
This document summarizes Thomas Friedman's book "Hot, Flat, and Crowded" which addresses the major energy, climate, and environmental challenges facing the world. It diagnoses trends of increasing energy demand, climate change impacts, and a growing global population that is putting pressure on natural resources. The document outlines five key problems, and discusses how transitioning to renewable energy and reducing fossil fuel dependence can help address these issues and lift people out of energy poverty.
6. Assessment of impact of speed limit reduction and traffic signal
1. The study examines the effects of reducing speed limits from 50 km/h to 30 km/h in a residential area of Antwerp, Belgium and implementing coordinated traffic signals along a major road using microscopic traffic simulation and an emissions model.
2. Reducing speed limits in the residential area was found to reduce CO2 and NOx emissions by about 25%. Implementing coordinated traffic signals was found to reduce emissions by about 10%.
3. The integrated model combines microscopic traffic simulation to model vehicle behavior with an emissions model to estimate pollutants based on vehicle speeds and accelerations from the simulation. This allows assessment of traffic management measures on local air pollution.
5. Microsimulation of Traffic
This study used micro-simulation traffic modeling (Paramics) coupled with an emissions prediction model (Versit+) to examine the impact of two traffic management schemes on vehicle emissions in Antwerp, Belgium. Reducing the network speed limit was found to decrease CO2 emissions by 23-41% and NOx and PM by 27-45%, while removing green wave traffic signal coordination increased emissions by around 10%. The models provided an effective way to evaluate potential traffic and air quality impacts of management strategies at a network level.
4. CombinedAssessment
This document summarizes a study that developed a model to assess the combined impacts of road traffic on noise and air pollution. The model combines microscopic traffic simulation with emission models for noise and air pollutants. The model was applied to a case study area in Belgium. Three scenarios were examined: the current situation with synchronized traffic lights, an unsynchronized light scenario, and a reduced speed limit scenario with synchronized lights. The results allow investigation of how traffic management measures influence emissions and provide guidance for urban planning.
Rational Revolution
This document discusses rationality and making rational decisions. It argues that people often make irrational decisions due to errors in estimating the value and effort of seeking something and due to caring too much about social acceptance and what others think. Some key points made include that happiness is similar in most circumstances because people can synthesize happiness from friends, family, purpose and health. The document advocates making rational financial decisions based on accurate probability and value estimates rather than media influences, and embracing minimalism to maximize happiness from possessions.
Brochure
Dr. Madhava runs Logic Academy, an educational institution located in Hyderabad, India. The academy offers intensive SAT, PSAT, and SAT Subject test preparation courses that are 3 months long and involve lectures, practice tests, and individual feedback sessions. Dr. Madhava employs effective learning tools like visual cues and simulation software to help students understand concepts and retain information. He has a PhD in Engineering from the USA and experience teaching Mathematics, Physics, and English.
Reasoning Course 14 weeks
Dr. Madhava's Logic Academy offers mathematical aptitude and logical reasoning classes. The purpose is to keep students' natural curiosity alive and develop their imagination and creativity. The classes focus on applying what students already know to solve problems, rather than teaching new formulas. Sample questions require using concepts like number systems, geometry, and algebra to solve problems involving rectangles, tents and kids, even and odd numbers, and finding the shortest path for a bug. The target age is 12-14 years old in grades 7-9. Students must pass a screening test to be enrolled in the 15-week courses meeting on Wednesdays, Fridays, Sundays, Tuesdays and Thursdays starting in September 2016.
Report on Institutional Collaboration
The document reports on a task force visit to several Ethiopian universities to share experiences on institutional collaboration. The task force visited Jimma Institute of Technology, Addis Ababa Institute of Technology, Addis Ababa Science and Technology University, and Adama Institute of Technology. They learned about collaboration activities including faculty exchange programs, research partnerships, community projects, internship programs, and administrative practices. The universities have both national and international collaborations with industry, government, other universities, and research institutions to strengthen their academic and research capabilities.
Industry LInkages
This document provides a proposal on developing industrial linkages for the College of Engineering & Technology at Dilla University. It begins with background on the university, including its vision, mission, goals and objectives. It then discusses the specific college, providing its vision and mission.
The proposal aims to establish linkages between the college and relevant industries, universities, technical and vocational education and training programs, and local governments. It outlines general and specific objectives for each type of linkage. An action plan with timeline and resource needs is also included to implement the linkages. The document concludes with a budget justification section.
Numerical methods notes
This document contains chapter summaries for mathematical modeling, approximations and round-off errors, Gauss elimination, and LU decomposition & matrix inversion. The chapter on Gauss elimination describes a technique for solving simultaneous linear algebraic equations by combining equations to eliminate unknowns. It remains an important algorithm today and is the basis for linear equation solving in popular software packages.
MS1-Lecture Notes
This document outlines lecture notes on engineering materials covering topics like atomic structure, crystalline structure, defects in crystals, deformation in solids, failure and fracture mechanisms, mechanical properties including tensile, compressive, and torsional strength, and phase transformations. Key chapters discuss valency, defects in crystals, deformation through slip, failure causes, stress-strain curves, fatigue strength, and phase diagrams of alloy systems.
More from Dr, Madhava Madireddy (20)
6. Assessment of impact of speed limit reduction and traffic signal
6. Assessment of impact of speed limit reduction and traffic signal