Tayeb Brahimi - Academia.edu (original) (raw)

Papers by Tayeb Brahimi

Research paper thumbnail of Wave energy converters: Barriers and drivers

IEOM Societyieom-society@iieom.org, 2020

Research paper thumbnail of ICT Education for Sustainable Development: Saudi Institutions of Higher Learning, the Case of Effat University

Research and Innovation Forum 2020, 2021

This study explores the crossroads between ICT education and sustainable development in the conte... more This study explores the crossroads between ICT education and sustainable development in the context of higher learning of Saudi institutions. In particular, this research seeks to examine the ways and means according to which ICT education at Effat University contributes to several critical domains of sustainable development. The study includes bridging the gender equality gap, reducing poverty and marginalization, enhancing social inclusion, promoting active community engagement, and redefining the role of women in socioeconomic development and political participation. The current research examines the contributions of the ICT program at Effat University to sustainable development, specifically in ICT education, research and training, ethics of sustainability, community engagement, and industrial collaboration. The study concludes that Effat University is currently making foundational contributions to national growth and sustainable development, while also effectively paving the way to the 2030 transformation agenda of Saudi Arabia. Further comparative research carried out on the crossroads between ICT and specific sustainability targets in the context of higher education institutions would improve findings.

Research paper thumbnail of Impact of Covid-19 on the U.S. energy production

international conference on industrial engineering and operations management, 2021

Research paper thumbnail of Dual pH level monitoring and control using IoT application

2018 15th Learning and Technology Conference (L&T), 2018

Potential of Hydrogen (pH) level is one of the main characteristics of any chemical solution. It ... more Potential of Hydrogen (pH) level is one of the main characteristics of any chemical solution. It plays a significant role in chemistry, pharmacy, medicine, agriculture, fish farming, and industries. Lately, Internet of Things (IoT) appears as a new era of research and applications. IoT is designed to connect both digital and physical objects using communication technology. The main objective of this paper is to build a tool that allows real-time control of the pH level of a specific solution or product using the Internet of Things (IoT) concept. Specifically, this tool is made of an Arduino that is connected to both a designed mobile app and a physical device using the internet. This app allows the user to choose either automatic (auto) or manual (manual) control modes. In the former, the system will behave as a feedback control scheme where the user will be requested to specify the desired pH value and the specific period needed to keep the experiment running. In the later (manual), the user should set the amounts of acidic and alkaline solutions in each pumping process. The hardware and software descriptions set out here will be realized as a prototype system.

Research paper thumbnail of Makerspace: A novel approach to creative learning

2017 Learning and Technology Conference (L&T) - The MakerSpace: from Imagining to Making!, 2017

Today there is a growing enthusiasm for the potential of makerspaces in providing engineers with ... more Today there is a growing enthusiasm for the potential of makerspaces in providing engineers with opportunities for innovation and sparking creativity to improve student's ability to design a system, component, or process to meet desired needs within realistic constraints. The objective of this study is to explore this novel approach in delivering design courses for students in product design track. This innovative approach shifts the active learning strategies from Do-It-Yourself to Do-It-With-Others culture. Results from a design studio 3 course show the benefit of working in makerspace environment in terms of enhancing the design and innovation, re-evaluating strategies and methodologies used in the course learning process, and the benefit of using SolidWorks and 3D printer applications to accelerate the learning process through virtual product realization.

Research paper thumbnail of Chapter 2 The Spirit of Silk Road: The Impact of Medieval Chinese–Arab Relations on the Contemporary Bilateral Sino–Arab Relations

The New Silk Road Leads through the Arab Peninsula: Mast ering Global Business and Inovation, 2019

Research paper thumbnail of Characterizing IOMT/Personal Area Networks Landscape

The attention garnered by the Internet of Things (IoT) term has taken the world by a storm. IOT c... more The attention garnered by the Internet of Things (IoT) term has taken the world by a storm. IOT concepts have been applied to various domains revolutionizing the way business processes are conducted. Health Informatics is a nascent multidisciplinary field that aims at applying information engineering concepts to healthcare. The information traditionally came from a variety of sources such as healthcare IT systems but recently is being stored in variety of IOT devices. Application of IOT concepts is becoming the norm giving rise to the Internet of Medical Things (IOMT). However, IOMT introduces many challenges such as the real-time nature, security, and privacy of data along with others. Thus, understanding the underlying structure of IOMT is of paramount importance. Given the importance of the underlying networks, we explore various solutions currently employed in developing the Personal Area Networks (PANs) that are the underlying cornerstone of IOMT). PANs allow the sensors to mea...

Research paper thumbnail of Coping with COVID-19: Higher Education in the GCC Countries

Research and Innovation Forum 2020, 2021

Today, the COVID-19 pandemic has, among many other things, tested the resilience of higher educat... more Today, the COVID-19 pandemic has, among many other things, tested the resilience of higher education institutions, but profoundly reshaped the management of learning, education and skills development, leading to a rethinking of perspectives and approaches within the education business as a whole This is in addition to prompting transformation systems to better adjust to the devastating effects and implications of this pandemic or other possible potential crises This study seeks to provide a general descriptive and analytical overview of the various responses of higher learning institutions in the context of Gulf Cooperation Council (GCC) amid seismic changes, with particular emphasis on the ways and means through which respective institutions have adopted to survive in the business of education, salvage the careers of its students’ population, all while challenged to protect their community well-being While events continue to unfold, this study also seeks to highlight the extent to which universities demonstrated their roles in preserving the standards of quality education and social responsibility in general, across the GCC countries during the pandemic of the COVID-19 and to draw attention to responses and coping mechanisms showcasing resilience, creativity, and re-imaginations of future educational business This study shows that institutions of higher education in the GCC, in their response to COVID-19, have implemented online learning effectively thanks to their already established distance education and digital transformation Through close coordination with their respective governments, GCC institutions of higher learning demonstrated good governance, showing due attention to the safety and welfare of their students, faculty, and staff, while giving attention to their roles in community service, whether in the form of promotion of awareness campaigns, volunteering, research support, and initiatives More research should explore the future of higher institutions in the post coronavirus world as well as the inter-communication and cooperation for better learning and education in the region © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG

Research paper thumbnail of IoT based assistive walker device for frail &visually impaired people

2018 15th Learning and Technology Conference (L&T), 2018

The frequency of falling among elderly and visually impaired people is constantly increasing. Thi... more The frequency of falling among elderly and visually impaired people is constantly increasing. This problem affects a large number of people who need additional support to maintain balance and stability while walking. The objective of this study is to design a smart assistive walker device for frail & visually impaired people to reduce the risk of falling and the costly emergency interventions and hospitalizations. The proposed device is based on the concept of the Internet of Things (IoT) to determine and communicate the location and the path of the person for possible action. The device contains hardware and software parts. The former, covering the electrical part of the walker with three components: Sensor, controller, output, and the later contains two components; “Map” and “Find Me” Apps. The IoT treats the information received from the sensors (position, objects, and people around) and sends commands to the controller to guide the walker to fulfill the elderly needs safely. Using the IoT concept and smart device design, we expect a reduction in the number of falls and a contribution in the prevention of disability among elderly and visually impaired people.

Research paper thumbnail of Impact of Accreditation on Engineering Education

Enhancing Knowledge Discovery and Innovation in the Digital Era, 2018

The objective of this study is to investigate the impact of accreditation on engineering educatio... more The objective of this study is to investigate the impact of accreditation on engineering education including student learning outcomes and innovation based on two accreditation bodies the NCAAA in KSA, and the ABET in USA. The article explores the approach of constructionism with emphasis to makerspace by delivering engineering and design courses with opportunities for innovation, creativity, and the ability to design a system, component, or process to meet desired needs. This innovative approach shifts the active learning strategies from Do-It-Yourself to Do-It-With-Others culture. Makerspace is one of the integral parts of modern education system that brings together and facilitates the community of interdisciplinary individuals. Results from courses in engineering and design shows the benefit of the accreditation in terms of enhancing the overall program quality and the importance of re-evaluating strategies and methodologies of learning which help in delivering innovative soluti...

Research paper thumbnail of Stress, anxiety, and depression among students and employees during the pandemic

Remote Learning in Times of Pandemic, 2021

Research paper thumbnail of Sensor Based Human Activity Recognition Using Adaboost Ensemble Classifier

Procedia Computer Science, 2018

Providing accurate information about human activity is an important task in a smart city environm... more Providing accurate information about human activity is an important task in a smart city environment. Human activity is complex, and it is important to use the best technology and benefit from the machine learning to learn about human activity. Although people have been interested in the past decade in recording human activities, there are still major aspects to be addressed to take advantage of technology in the knowledge of human activity. In this paper, Adaboost ensemble classifier is used to recognize human activity data taken from body sensors. Ensemble classifiers achieve better performance by using a weighted combination of several classifier models. Many researchers have shown the efficiencies of ensemble classifiers in different real-world problems. Experimental results have shown the feasibility of Adaboost ensemble classifiers by achieving the better performance for automated human activity recognition by using human body sensors. Results have shown that ensemble classifiers based on Adaboost algorithm significantly improve the performance of automated human activity recognition (HAR).

Research paper thumbnail of Numerical Modeling of Magnetic Nanoparticles Transport in a Two-Phase Flow in Porous Media

SPE Reservoir Characterisation and Simulation Conference and Exhibition, 2017

In this paper, the problem of magnetic nanoparticle injection into a water-oil two-phase flow und... more In this paper, the problem of magnetic nanoparticle injection into a water-oil two-phase flow under an external permanent magnetic field is investigated numerically. The mathematical model of the problem under consideration has been developed. We treat the water- nanoparticle suspension as a miscible mixture while it is immiscible with the oil phase. The magnetization, density, and viscosity of ferrofluids are obtained using immiscible mixture relations. On the other hand, the magnetized phase pressure will have additional pressure terms relative to the conventional thermodynamic pressure, namely, the ferrofluid phase dynamic pressure, the fluid magnetic pressure, and the magneto-strictive pressure, while, the magnetic normal pressure is neglected in this study. Physical variables including water-nanoparticle suspension saturation, nanoparticle concentration, and pore wall/throat deposited nanoparticle, are investigated under the influence of the magnetic field. From our results, we...

Research paper thumbnail of The Impact of Accreditation on Student Learning Outcomes

International Journal of Knowledge Society Research, 2016

In recent years, student outcomes in higher education has captured the interest and concern of ac... more In recent years, student outcomes in higher education has captured the interest and concern of accreditation communities, governments, employers as well as international organizations. Student outcomes is becoming the principal gauge of higher education's effectiveness and accreditation bodies expect learning outcomes to be well defined, articulated, assessed, verified, and used as a guide for future improvement. The paper investigates the impact of accreditation on student outcomes in higher education and examines the impact of two accreditation bodies on student outcomes, namely: The National Commission for Academic Accreditation and Assessment (NCAAA) established by the Higher Council of Education in Saudi Arabia and the Accreditation Board for Engineering and Technology Inc. (ABET). Results from a course in Mathematics at Effat University, Jeddah, KSA, showed how important the learning outcome is in the process of re-evaluating strategies and methodologies used in the learni...

Research paper thumbnail of Investigation of the physical processes underlying the ice accretion phenomena

36th AIAA Aerospace Sciences Meeting and Exhibit, 1998

National and postnational identities in Latin America. Contributions and questions from the under... more National and postnational identities in Latin America. Contributions and questions from the understanding of Jürgen Habermas ANDRÉS DONOSO ROMO* RESUMEN ¿Por qué se está dispuesto a morir/matar por la nación? ¿Estaría perdiendo fuerza este imperativo en América Latina desde la última década del siglo XX? ¿Es el nosotros un problema cultural? Estas preguntas se encuentran detrás de este artículo, siendo del tipo de interrogantes que se enuncian cada vez que el sentido que aporta la cultura y/o la tradición a la vida de las personas es cuestionado por nuevas comprensiones identitarias que aspiran a hacerse hegemónicas. Aquí se presentan las propuestas que Habermas elabora para distinguir las identidades nacionales y postnacionales en diálogo con reflexiones sobre su pertinencia en América Latina.

Research paper thumbnail of Aerodynamic Analysis Models for Vertical-Axis Wind Turbines

International Journal of Rotating Machinery, 1995

This work details the progress made in the development of aerodynamic models for studying Vertica... more This work details the progress made in the development of aerodynamic models for studying Vertical-Axis Wind Turbines (VAWT's) with particular emphasis on the prediction of aerodynamic loads and rotor performance as well as dynamic stall simulations. The paper describes current effort and some important findings using streamtube models, 3-D viscous model, stochastic wind model and numerical simulation of the flow around the turbine blades. Comparison of the analytical results with available experimental data have shown good agreement.

Research paper thumbnail of Ice accretion prediction on single and multi-element airfoils and the resulting performance degradation

35th Aerospace Sciences Meeting and Exhibit, 1997

ABSTRACT

Research paper thumbnail of Darrieus Rotor Aerodynamics in Turbulent Wind

Journal of Solar Energy Engineering, 1995

The earlier aerodynamic models for studying vertical axis wind turbines (VAWT’s) are based on con... more The earlier aerodynamic models for studying vertical axis wind turbines (VAWT’s) are based on constant incident wind conditions and are thus capable of predicting only periodic variations in the loads. The purpose of the present study is to develop a mode capable of predicting the aerodynamic loads on the Darrieus rotor in a turbulent wind. This model is based on the double-multiple streamtube method (DMS) and incorporates a stochastic wind model The method used to simulate turbulent velocity fluctuations is based on the power spectral density. The problem consists in generating a region of turbulent flow with a relevant spectrum and spatial correlation. The first aerodynamic code developed is based on a one-dimensional turbulent wind model. However, since this model ignores the structure of the turbulence in the crossflow plane, an extension to three dimensions has been made. The computer code developed, CARDAAS, has been used to predict aerodynamic loads for the Sandia-17m rotor a...

Research paper thumbnail of Prediction of ice accretion with viscous effects on aircraft wings

Journal of Aircraft, 1994

ABSTRACT A method using the viscous-inviscid interaction technique has been developed for the cal... more ABSTRACT A method using the viscous-inviscid interaction technique has been developed for the calculation of ice accretion on three-dimensional wings of any cross section or planform geometry. This technique matches a panel method for external potential calculation with a boundary-layer correction to calculate the flowfield. The resulting velocity field is subsequently used to compute water droplet trajectories and their impact points on the wing to obtain the quantity of ice accumulated. The method yields ice shapes that are in good agreement with numerical and experimental results in rime ice conditions.

Research paper thumbnail of Modeling and Numerical Analysis of Harvesting Atmospheric Water Using Copper Chloride

2022 6th International Conference on Green Energy and Applications (ICGEA)

Research paper thumbnail of Wave energy converters: Barriers and drivers

IEOM Societyieom-society@iieom.org, 2020

Research paper thumbnail of ICT Education for Sustainable Development: Saudi Institutions of Higher Learning, the Case of Effat University

Research and Innovation Forum 2020, 2021

This study explores the crossroads between ICT education and sustainable development in the conte... more This study explores the crossroads between ICT education and sustainable development in the context of higher learning of Saudi institutions. In particular, this research seeks to examine the ways and means according to which ICT education at Effat University contributes to several critical domains of sustainable development. The study includes bridging the gender equality gap, reducing poverty and marginalization, enhancing social inclusion, promoting active community engagement, and redefining the role of women in socioeconomic development and political participation. The current research examines the contributions of the ICT program at Effat University to sustainable development, specifically in ICT education, research and training, ethics of sustainability, community engagement, and industrial collaboration. The study concludes that Effat University is currently making foundational contributions to national growth and sustainable development, while also effectively paving the way to the 2030 transformation agenda of Saudi Arabia. Further comparative research carried out on the crossroads between ICT and specific sustainability targets in the context of higher education institutions would improve findings.

Research paper thumbnail of Impact of Covid-19 on the U.S. energy production

international conference on industrial engineering and operations management, 2021

Research paper thumbnail of Dual pH level monitoring and control using IoT application

2018 15th Learning and Technology Conference (L&T), 2018

Potential of Hydrogen (pH) level is one of the main characteristics of any chemical solution. It ... more Potential of Hydrogen (pH) level is one of the main characteristics of any chemical solution. It plays a significant role in chemistry, pharmacy, medicine, agriculture, fish farming, and industries. Lately, Internet of Things (IoT) appears as a new era of research and applications. IoT is designed to connect both digital and physical objects using communication technology. The main objective of this paper is to build a tool that allows real-time control of the pH level of a specific solution or product using the Internet of Things (IoT) concept. Specifically, this tool is made of an Arduino that is connected to both a designed mobile app and a physical device using the internet. This app allows the user to choose either automatic (auto) or manual (manual) control modes. In the former, the system will behave as a feedback control scheme where the user will be requested to specify the desired pH value and the specific period needed to keep the experiment running. In the later (manual), the user should set the amounts of acidic and alkaline solutions in each pumping process. The hardware and software descriptions set out here will be realized as a prototype system.

Research paper thumbnail of Makerspace: A novel approach to creative learning

2017 Learning and Technology Conference (L&T) - The MakerSpace: from Imagining to Making!, 2017

Today there is a growing enthusiasm for the potential of makerspaces in providing engineers with ... more Today there is a growing enthusiasm for the potential of makerspaces in providing engineers with opportunities for innovation and sparking creativity to improve student's ability to design a system, component, or process to meet desired needs within realistic constraints. The objective of this study is to explore this novel approach in delivering design courses for students in product design track. This innovative approach shifts the active learning strategies from Do-It-Yourself to Do-It-With-Others culture. Results from a design studio 3 course show the benefit of working in makerspace environment in terms of enhancing the design and innovation, re-evaluating strategies and methodologies used in the course learning process, and the benefit of using SolidWorks and 3D printer applications to accelerate the learning process through virtual product realization.

Research paper thumbnail of Chapter 2 The Spirit of Silk Road: The Impact of Medieval Chinese–Arab Relations on the Contemporary Bilateral Sino–Arab Relations

The New Silk Road Leads through the Arab Peninsula: Mast ering Global Business and Inovation, 2019

Research paper thumbnail of Characterizing IOMT/Personal Area Networks Landscape

The attention garnered by the Internet of Things (IoT) term has taken the world by a storm. IOT c... more The attention garnered by the Internet of Things (IoT) term has taken the world by a storm. IOT concepts have been applied to various domains revolutionizing the way business processes are conducted. Health Informatics is a nascent multidisciplinary field that aims at applying information engineering concepts to healthcare. The information traditionally came from a variety of sources such as healthcare IT systems but recently is being stored in variety of IOT devices. Application of IOT concepts is becoming the norm giving rise to the Internet of Medical Things (IOMT). However, IOMT introduces many challenges such as the real-time nature, security, and privacy of data along with others. Thus, understanding the underlying structure of IOMT is of paramount importance. Given the importance of the underlying networks, we explore various solutions currently employed in developing the Personal Area Networks (PANs) that are the underlying cornerstone of IOMT). PANs allow the sensors to mea...

Research paper thumbnail of Coping with COVID-19: Higher Education in the GCC Countries

Research and Innovation Forum 2020, 2021

Today, the COVID-19 pandemic has, among many other things, tested the resilience of higher educat... more Today, the COVID-19 pandemic has, among many other things, tested the resilience of higher education institutions, but profoundly reshaped the management of learning, education and skills development, leading to a rethinking of perspectives and approaches within the education business as a whole This is in addition to prompting transformation systems to better adjust to the devastating effects and implications of this pandemic or other possible potential crises This study seeks to provide a general descriptive and analytical overview of the various responses of higher learning institutions in the context of Gulf Cooperation Council (GCC) amid seismic changes, with particular emphasis on the ways and means through which respective institutions have adopted to survive in the business of education, salvage the careers of its students’ population, all while challenged to protect their community well-being While events continue to unfold, this study also seeks to highlight the extent to which universities demonstrated their roles in preserving the standards of quality education and social responsibility in general, across the GCC countries during the pandemic of the COVID-19 and to draw attention to responses and coping mechanisms showcasing resilience, creativity, and re-imaginations of future educational business This study shows that institutions of higher education in the GCC, in their response to COVID-19, have implemented online learning effectively thanks to their already established distance education and digital transformation Through close coordination with their respective governments, GCC institutions of higher learning demonstrated good governance, showing due attention to the safety and welfare of their students, faculty, and staff, while giving attention to their roles in community service, whether in the form of promotion of awareness campaigns, volunteering, research support, and initiatives More research should explore the future of higher institutions in the post coronavirus world as well as the inter-communication and cooperation for better learning and education in the region © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG

Research paper thumbnail of IoT based assistive walker device for frail &visually impaired people

2018 15th Learning and Technology Conference (L&T), 2018

The frequency of falling among elderly and visually impaired people is constantly increasing. Thi... more The frequency of falling among elderly and visually impaired people is constantly increasing. This problem affects a large number of people who need additional support to maintain balance and stability while walking. The objective of this study is to design a smart assistive walker device for frail & visually impaired people to reduce the risk of falling and the costly emergency interventions and hospitalizations. The proposed device is based on the concept of the Internet of Things (IoT) to determine and communicate the location and the path of the person for possible action. The device contains hardware and software parts. The former, covering the electrical part of the walker with three components: Sensor, controller, output, and the later contains two components; “Map” and “Find Me” Apps. The IoT treats the information received from the sensors (position, objects, and people around) and sends commands to the controller to guide the walker to fulfill the elderly needs safely. Using the IoT concept and smart device design, we expect a reduction in the number of falls and a contribution in the prevention of disability among elderly and visually impaired people.

Research paper thumbnail of Impact of Accreditation on Engineering Education

Enhancing Knowledge Discovery and Innovation in the Digital Era, 2018

The objective of this study is to investigate the impact of accreditation on engineering educatio... more The objective of this study is to investigate the impact of accreditation on engineering education including student learning outcomes and innovation based on two accreditation bodies the NCAAA in KSA, and the ABET in USA. The article explores the approach of constructionism with emphasis to makerspace by delivering engineering and design courses with opportunities for innovation, creativity, and the ability to design a system, component, or process to meet desired needs. This innovative approach shifts the active learning strategies from Do-It-Yourself to Do-It-With-Others culture. Makerspace is one of the integral parts of modern education system that brings together and facilitates the community of interdisciplinary individuals. Results from courses in engineering and design shows the benefit of the accreditation in terms of enhancing the overall program quality and the importance of re-evaluating strategies and methodologies of learning which help in delivering innovative soluti...

Research paper thumbnail of Stress, anxiety, and depression among students and employees during the pandemic

Remote Learning in Times of Pandemic, 2021

Research paper thumbnail of Sensor Based Human Activity Recognition Using Adaboost Ensemble Classifier

Procedia Computer Science, 2018

Providing accurate information about human activity is an important task in a smart city environm... more Providing accurate information about human activity is an important task in a smart city environment. Human activity is complex, and it is important to use the best technology and benefit from the machine learning to learn about human activity. Although people have been interested in the past decade in recording human activities, there are still major aspects to be addressed to take advantage of technology in the knowledge of human activity. In this paper, Adaboost ensemble classifier is used to recognize human activity data taken from body sensors. Ensemble classifiers achieve better performance by using a weighted combination of several classifier models. Many researchers have shown the efficiencies of ensemble classifiers in different real-world problems. Experimental results have shown the feasibility of Adaboost ensemble classifiers by achieving the better performance for automated human activity recognition by using human body sensors. Results have shown that ensemble classifiers based on Adaboost algorithm significantly improve the performance of automated human activity recognition (HAR).

Research paper thumbnail of Numerical Modeling of Magnetic Nanoparticles Transport in a Two-Phase Flow in Porous Media

SPE Reservoir Characterisation and Simulation Conference and Exhibition, 2017

In this paper, the problem of magnetic nanoparticle injection into a water-oil two-phase flow und... more In this paper, the problem of magnetic nanoparticle injection into a water-oil two-phase flow under an external permanent magnetic field is investigated numerically. The mathematical model of the problem under consideration has been developed. We treat the water- nanoparticle suspension as a miscible mixture while it is immiscible with the oil phase. The magnetization, density, and viscosity of ferrofluids are obtained using immiscible mixture relations. On the other hand, the magnetized phase pressure will have additional pressure terms relative to the conventional thermodynamic pressure, namely, the ferrofluid phase dynamic pressure, the fluid magnetic pressure, and the magneto-strictive pressure, while, the magnetic normal pressure is neglected in this study. Physical variables including water-nanoparticle suspension saturation, nanoparticle concentration, and pore wall/throat deposited nanoparticle, are investigated under the influence of the magnetic field. From our results, we...

Research paper thumbnail of The Impact of Accreditation on Student Learning Outcomes

International Journal of Knowledge Society Research, 2016

In recent years, student outcomes in higher education has captured the interest and concern of ac... more In recent years, student outcomes in higher education has captured the interest and concern of accreditation communities, governments, employers as well as international organizations. Student outcomes is becoming the principal gauge of higher education's effectiveness and accreditation bodies expect learning outcomes to be well defined, articulated, assessed, verified, and used as a guide for future improvement. The paper investigates the impact of accreditation on student outcomes in higher education and examines the impact of two accreditation bodies on student outcomes, namely: The National Commission for Academic Accreditation and Assessment (NCAAA) established by the Higher Council of Education in Saudi Arabia and the Accreditation Board for Engineering and Technology Inc. (ABET). Results from a course in Mathematics at Effat University, Jeddah, KSA, showed how important the learning outcome is in the process of re-evaluating strategies and methodologies used in the learni...

Research paper thumbnail of Investigation of the physical processes underlying the ice accretion phenomena

36th AIAA Aerospace Sciences Meeting and Exhibit, 1998

National and postnational identities in Latin America. Contributions and questions from the under... more National and postnational identities in Latin America. Contributions and questions from the understanding of Jürgen Habermas ANDRÉS DONOSO ROMO* RESUMEN ¿Por qué se está dispuesto a morir/matar por la nación? ¿Estaría perdiendo fuerza este imperativo en América Latina desde la última década del siglo XX? ¿Es el nosotros un problema cultural? Estas preguntas se encuentran detrás de este artículo, siendo del tipo de interrogantes que se enuncian cada vez que el sentido que aporta la cultura y/o la tradición a la vida de las personas es cuestionado por nuevas comprensiones identitarias que aspiran a hacerse hegemónicas. Aquí se presentan las propuestas que Habermas elabora para distinguir las identidades nacionales y postnacionales en diálogo con reflexiones sobre su pertinencia en América Latina.

Research paper thumbnail of Aerodynamic Analysis Models for Vertical-Axis Wind Turbines

International Journal of Rotating Machinery, 1995

This work details the progress made in the development of aerodynamic models for studying Vertica... more This work details the progress made in the development of aerodynamic models for studying Vertical-Axis Wind Turbines (VAWT's) with particular emphasis on the prediction of aerodynamic loads and rotor performance as well as dynamic stall simulations. The paper describes current effort and some important findings using streamtube models, 3-D viscous model, stochastic wind model and numerical simulation of the flow around the turbine blades. Comparison of the analytical results with available experimental data have shown good agreement.

Research paper thumbnail of Ice accretion prediction on single and multi-element airfoils and the resulting performance degradation

35th Aerospace Sciences Meeting and Exhibit, 1997

ABSTRACT

Research paper thumbnail of Darrieus Rotor Aerodynamics in Turbulent Wind

Journal of Solar Energy Engineering, 1995

The earlier aerodynamic models for studying vertical axis wind turbines (VAWT’s) are based on con... more The earlier aerodynamic models for studying vertical axis wind turbines (VAWT’s) are based on constant incident wind conditions and are thus capable of predicting only periodic variations in the loads. The purpose of the present study is to develop a mode capable of predicting the aerodynamic loads on the Darrieus rotor in a turbulent wind. This model is based on the double-multiple streamtube method (DMS) and incorporates a stochastic wind model The method used to simulate turbulent velocity fluctuations is based on the power spectral density. The problem consists in generating a region of turbulent flow with a relevant spectrum and spatial correlation. The first aerodynamic code developed is based on a one-dimensional turbulent wind model. However, since this model ignores the structure of the turbulence in the crossflow plane, an extension to three dimensions has been made. The computer code developed, CARDAAS, has been used to predict aerodynamic loads for the Sandia-17m rotor a...

Research paper thumbnail of Prediction of ice accretion with viscous effects on aircraft wings

Journal of Aircraft, 1994

ABSTRACT A method using the viscous-inviscid interaction technique has been developed for the cal... more ABSTRACT A method using the viscous-inviscid interaction technique has been developed for the calculation of ice accretion on three-dimensional wings of any cross section or planform geometry. This technique matches a panel method for external potential calculation with a boundary-layer correction to calculate the flowfield. The resulting velocity field is subsequently used to compute water droplet trajectories and their impact points on the wing to obtain the quantity of ice accumulated. The method yields ice shapes that are in good agreement with numerical and experimental results in rime ice conditions.

Research paper thumbnail of Modeling and Numerical Analysis of Harvesting Atmospheric Water Using Copper Chloride

2022 6th International Conference on Green Energy and Applications (ICGEA)