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- Dr Ahmed Mohamed Ahmed Haidar (6)
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Articles 1 - 27 of 27
Full-Text Articles in Physical Sciences and Mathematics
The Gaise College Report: The American Statistical Association Meets Sound Pedagogy In Central Virginia, Beverly Wood
The Gaise College Report: The American Statistical Association Meets Sound Pedagogy In Central Virginia, Beverly Wood
Beverly Wood
Research in undergraduate statistics education often centers on the introductory course required for a large percentage of college students. While acknowledging the diverse setting, audience, and purpose of introductory courses, existing research assumes that courses offered by different disciplines share the same goals and teaching practices. The purpose of this study is to examine the objectives for student outcomes and pedagogical delivery of introductory statistics courses in various academic departments to provide explicit evidence for this assumption. The American Statistical Association’s Guidelines for Assessment and Instruction in Statistics Education (GAISE) are meant to apply to all introductory courses. The College …
Guidelines For Assessment And Instruction In Statistics Education (Gaise) College Report 2016, Robert Carver, Michelle Everson, John Gabrosek, Nicholas Horton, Robin Lock, Megan Mocko, Allan Rossman, Ginger Holmes Roswell, Paul Velleman, Jeffrey Witmer, Beverly Wood
Guidelines For Assessment And Instruction In Statistics Education (Gaise) College Report 2016, Robert Carver, Michelle Everson, John Gabrosek, Nicholas Horton, Robin Lock, Megan Mocko, Allan Rossman, Ginger Holmes Roswell, Paul Velleman, Jeffrey Witmer, Beverly Wood
Beverly Wood
In 2005 the American Statistical Association (ASA) endorsed the Guidelines for Assessment and Instruction in Statistics Education (GAISE) College Report. This report has had a profound impact on the teaching of introductory statistics in two- and four-year institutions, and the six recommendations put forward in the report have stood the test of time. Much has happened within the statistics education community and beyond in the intervening 10 years, making it critical to re-evaluate and update this important report. For readers who are unfamiliar with the original GAISE College Report or who are new to the statistics education community, the full …
Towards A Context Agnostic Platform For Design And Assessment Of Educational Games, Tyler Baron, Corey Heath, Ashish Amresh
Towards A Context Agnostic Platform For Design And Assessment Of Educational Games, Tyler Baron, Corey Heath, Ashish Amresh
Ashish Amresh
The majority of the games designed for improving, acquiring or transferring knowledge rely heavily on building game mechanics that are grounded deeply in the content or subject matter being taught. There is a growing need for educational practitioners and pedagogical experts to have the ability to easily map learning outcomes by choosing from a pallet of functioning game mechanics without having the need to redesign them from scratch. In this paper, we present the current state of the art in context agnostic design and assessment of educational games, and propose three strategies that educators can take advantage of during the …
Teaching And Assessing Programming Fundamentals For Non Majors With Visual Programming, William Honig
Teaching And Assessing Programming Fundamentals For Non Majors With Visual Programming, William Honig
William L Honig
Visual programming tools and mobile device applications are a natural tool to engage university students; but, are they effective in teaching quantitative thinking skills to non computer science majors? Answering this question can be based on careful assessment of the learning outcomes. This paper reports the results from teaching over 100 students mobile app development with App Inventor in a university core course. Results were measured using an assessment process motivated by Bloom's Taxonomy that included student self assessment, ratings by instructors, and comparisons of the two results. The categories in the assessment were mapped to specific levels of skills …
Motivation For Achievement And Attitudes Toward Mathematics Instruction In A Required Calculus Course At The Norwegian University Of Science And Technology, Donna Sundre, Carol Barry, Vidar Gynnild, Erin Tangen Ostgard
Motivation For Achievement And Attitudes Toward Mathematics Instruction In A Required Calculus Course At The Norwegian University Of Science And Technology, Donna Sundre, Carol Barry, Vidar Gynnild, Erin Tangen Ostgard
Donna L. Sundre
This study from the Norwegian University of Science and Technology (NTNU) examines students’ learning goals and attitudes toward mathematics in a first-year calculus course in undergraduate engineering education. Achievement motivation research using the Achievement Goal Questionnaire (AGQ) is advanced from current literature with two additions: (1) a course specific context using introductory college calculus students, and (2) participation of Norwegian students. Pre- and posttest measures of attitudes indicate that students do change learning goals over time, unfortunately opposite to the instructors’ aspirations. A significant increase in “Mastery Avoidance” and “Work Avoidance” was accompanied with a drop in “Mastery Approach” and …
Vulnerability Assessment Of A Large Sized Power System Considering A New Index Based On Power System Loss, Ahmed M. Haidar, Azah Mohamed, Aini Hussain
Vulnerability Assessment Of A Large Sized Power System Considering A New Index Based On Power System Loss, Ahmed M. Haidar, Azah Mohamed, Aini Hussain
Dr Ahmed Mohamed Ahmed Haidar
The concept of power system vulnerability assessment combines information on the level of system security as well as information on a wide range of situations, events and contingencies with regards to which a system is vulnerable. This paper attempts to investigate and evaluate the effect of line outage, generation outage and amount of load disconnected on the power transmission network losses of a large size power system. These effects will be investigated and evaluated using new proposed method based on vulnerability index of power system loss. The objectives of this work is to evaluate and compare the efficiency of the …
Grounding Locations Assessment Of Practical Power System, Nadheer Shalash, Ahmed M. Haidar, Abdul Sattar
Grounding Locations Assessment Of Practical Power System, Nadheer Shalash, Ahmed M. Haidar, Abdul Sattar
Dr Ahmed Mohamed Ahmed Haidar
Grounding Points (GPs) are installed in electrical power system to drive protective devices and accomplish the person- nel safety. The general grounding problem is to find the optimal locations of these points so that the security and reli- ability of power system can be improved. This paper presents a practical approach to find the optimal location of GPs based on the ratios of zero sequence reactance with positive sequence reactance (X0/X1), zero sequence resistance with positive sequence reactance (R0/X1) and Ground Fault Factor (GFF). The optimal values of these indicators were deter- mined by considering several scenarios of fault disturbances …
A Computational Intelligence-Based Suite For Vulnerability Assessment Of Electrical Power Systems, Ahmed Haidar, Azah Mohamed, Federico Milano
A Computational Intelligence-Based Suite For Vulnerability Assessment Of Electrical Power Systems, Ahmed Haidar, Azah Mohamed, Federico Milano
Dr Ahmed Mohamed Ahmed Haidar
This paper discusses the feasibility of implementing computational intelligence algorithms for power system analysis in an open source environment. The scope is specially oriented to education, training and research. In particular, the paper describes a software package, namely Computational Intelligence Applications to Power System (CIAPS), that implements a variety of heuristic techniques for vulnerability assessment of electrical power systems. CIAPS is based on Matlab and suited for analysis and simulation of small to large size electric power systems. CIAPS is used for solving power flow, optimal power flow, contingency analysis based on artificial neural networks and fuzzy logic techniques. A …
Vulnerability Assessment Of Power System Using Radial Basis Function Neural Network And A New Feature Extraction Method, Ahmed M. Haidar, Azah Mohamed, Aini Hussain
Vulnerability Assessment Of Power System Using Radial Basis Function Neural Network And A New Feature Extraction Method, Ahmed M. Haidar, Azah Mohamed, Aini Hussain
Dr Ahmed Mohamed Ahmed Haidar
Vulnerability assessment in power systems is important so as to determine how vulnerable a power system in case of any unforeseen catastrophic events. This paper presents the application of Radial Basis Function Neural Network (RBFNN) for vulnerability assessment of power system incorporating a new proposed feature extraction method named as the Neural Network Weight Extraction (NNWE) for dimensionality reduction of input data. The performance of the RBFNN is compared with the Multi Layer Perceptron Neural Network (MLPNN) so as to evaluate the effectiveness of the RBFNN in assessing the vulnerability of a power system based on the indices, power system …
Optimal Configuration Assessment Of Renewable Energy In Malaysia, Ahmed Haidar, Priscilla John, Mohd Shawal
Optimal Configuration Assessment Of Renewable Energy In Malaysia, Ahmed Haidar, Priscilla John, Mohd Shawal
Dr Ahmed Mohamed Ahmed Haidar
This paper proposes the use of a PVewindediesel generator hybrid system in order to determine the optimal configuration of renewable energy in Malaysia and to compare the production cost of solar and wind power with its annual yield relevant to different regions in Malaysia namely, Johor, Sarawak, Penang and Selangor. The configuration of optimal hybrid system is selected based on the best components and sizing with appropriate operating strategy to provide a cheap, efficient, reliable and cost-effective system. The various renewable energy sources and their applicability in terms of cost and performance are analyzed. Moreover, the annual yield and cost …
New Method Vulnerability Assessment Of Power System, Ahmed Haidar, Azah Mohamed, Aini Hussain
New Method Vulnerability Assessment Of Power System, Ahmed Haidar, Azah Mohamed, Aini Hussain
Dr Ahmed Mohamed Ahmed Haidar
Vulnerability assessment in power systems is to determine a power system`s ability to continue to provide service in case of an unforeseen catastrophic contingency. It combines information on the level of system security as well as information on a wide range of scenarios, events and contingencies. To assess the level of system strength or weakness relative to the occurrence of an undesired event, a quantitative measure based on vulnerability index is often considered. In this study, a new vulnerability assessment method is proposed based on total power system loss which considers power generation loss due to generation outage, power line …
Assessment As A Tool For Learning, Maureen Morris, Anne Porter, David Atherton Griffiths
Assessment As A Tool For Learning, Maureen Morris, Anne Porter, David Atherton Griffiths
Associate Professor Anne Porter
Assessment should provide a catalyst for student learning and for reflective teaching practices. Fundamental to the development of appropriate assessment must be a direct link between what is being taught and what is being learned. Both teacher and student must be able to identify this link. The teacher needs to ensure the relevance and validity of the task in terms of both the instructional process and subject objectives. Student learning results in the construction of new knowledge through a process that assembles personally identified content and skills. Subsequent assessment may be facilitated by classification of learning outcomes. The use of …
Participatory Assessment Of Water Developments In An Atoll Town, Magnus Moglia, Pascal Perez
Participatory Assessment Of Water Developments In An Atoll Town, Magnus Moglia, Pascal Perez
Professor Pascal Perez
Water development projects often fail, which represents a poor outcome given the limited progress against the Millennium Development Goals in providing people with adequate water and sanitation services. This may not be surprising given that water management has been identified as being in the complex system domain. According to the Cynefin framework, many traditional approaches are not suitable; but it suggests an approach based on the methods of probe, sense and respond. In line with this general framework, a participatory assessment methodology has been used to explore experiences in the atoll town of Tarawa in the Republic of Kiribati. After …
Voltage Unbalance Emission Assessment In Radial Power Systems, U Jayatunga, S Perera, P Ciufo
Voltage Unbalance Emission Assessment In Radial Power Systems, U Jayatunga, S Perera, P Ciufo
Associate Professor Sarath Perera
Voltage unbalance (VU) emission assessment is an integral part in the VU-management process where loads are allocated a portion of the unbalance absorption capacity of the power system. The International Electrotechnical Commission Report IEC/TR 61000-3-13:2008 prescribes a VU emission allocation methodology establishing the fact that the VU can arise at the point of common connection (PCC) due to upstream network unbalance and load unbalance. Although this is the case for emission allocation, approaches for post connection emission assessment do not exist except for cases where the load is the only contributor to the VU at the PCC. Such assessment methods …
Review Of Disturbance Emissions Assessment Techniques, D Arlt, H Bronzeado, R Cai, E De Jaeger, Z Emin, M Halpin, F Klein, I Papic, P Paranavithana, S Perera, H Renner, F Zavoda
Review Of Disturbance Emissions Assessment Techniques, D Arlt, H Bronzeado, R Cai, E De Jaeger, Z Emin, M Halpin, F Klein, I Papic, P Paranavithana, S Perera, H Renner, F Zavoda
Associate Professor Sarath Perera
No abstract provided.
Conditions For The Assessment Of The Harmonic Compliance Of An Installation, Timothy J. Browne, Sarath Perera, Victor J. Gosbell
Conditions For The Assessment Of The Harmonic Compliance Of An Installation, Timothy J. Browne, Sarath Perera, Victor J. Gosbell
Associate Professor Sarath Perera
Methods of allocating harmonic emission limits to customer installations have evolved considerably, as evidenced by the development of harmonic guides such as IEEE-519 and IEC/TR 61000-3-6. However, there is only limited consensus on appropriate techniques validating compliance of installations with those limits. Existing techniques are reviewed and related problems are examined. Conditions which acceptable tests of compliance should meet are proposed.
Objective Functional Capacity Assessment Using Inertial Sensor, David Stirling, Fazel Naghdy, Golshah Naghdy, M. Field, R. Arunglabi, D. Kilpatrick
Objective Functional Capacity Assessment Using Inertial Sensor, David Stirling, Fazel Naghdy, Golshah Naghdy, M. Field, R. Arunglabi, D. Kilpatrick
Associate Professor Golshah Naghdy
Functional capacity assessment is carried out to measure the functional limitations of a subject. While the clinical assessment can be validated against various standards, quantifying the assessment and achieving an objective, repeatable, and reliable score in the clinical assessment is a challenge. Current methods are subjective. The Progressive Iso inertial Lifting Evaluation (PILE) is a lifting test developed for functional capacity assessment. The primary aim of this study is to improve reliability and repeatability of PILE through objective measurement of patient's performance. This is achieved by recording and analysing the movement of a patient by a motion capture system based …
Assessment Of Distributed Generation Impacts On Distribution Networks Using Unbalanced Three-Phase Power Flow Analysis, Md Jan-E- Alam, Kashem Muttaqi, Danny Sutanto
Assessment Of Distributed Generation Impacts On Distribution Networks Using Unbalanced Three-Phase Power Flow Analysis, Md Jan-E- Alam, Kashem Muttaqi, Danny Sutanto
Associate Professor Kashem Muttaqi
Impacts of Distributed Generation (DG) resources on distribution networks have been studied. A Newton-Raphson algorithm based three phase unbalance power flow program has been developed to incorporate the effects of system unbalance and single phase DG injection. Power flow equations have been formulated and solved in phase coordinated form. Effects of substation load-tap changer, voltage regulator, shunt capacitor and different type of load models have been considered in the development of the program. Phase asymmetry of distribution networks has been treated by modifying the Jacobian matrix. The proposed technique has been tested on IEEE 34 bus distribution test system for …
A Comprehensive Assessment Tool For Solar Pv Impacts On Low Voltage Three Phase Distribution Networks, M J E Alam, K Muttaqi, Danny Sutanto
A Comprehensive Assessment Tool For Solar Pv Impacts On Low Voltage Three Phase Distribution Networks, M J E Alam, K Muttaqi, Danny Sutanto
Associate Professor Kashem Muttaqi
Modern low voltage (LV) distribution networks are experiencing significant solar photovoltaic (PV) integration. Analysis of changing network behavior, resulting from daylong variation of feeder loads and PV outputs are becoming essential to capture the network response throughout the day under high PV penetration. A comprehensive tool has been presented in this paper to investigate the daylong changes in network behavior due to PV integration. The tool is capable of modeling the asymmetry and unbalance related complexities of distribution networks and also the effect of single phase PV on three phase distribution feeders. Analysis of PV impact has been performed using …
Combining Outputs From The North American Regional Climate Change Assessment Program By Using A Bayesian Hierarchical Model, Emily L. Kang, Noel Cressie, Stephan R. Sain
Combining Outputs From The North American Regional Climate Change Assessment Program By Using A Bayesian Hierarchical Model, Emily L. Kang, Noel Cressie, Stephan R. Sain
Professor Noel Cressie
We investigate the 20-year-average boreal winter temperatures generated by an ensemble of six regional climate models (RCMs) in phase I of the North American Regional Climate Change Assessment Program. We use the long-run average (20-year integration) to smooth out variability and to capture the climate properties from the RCM outputs. We find that, although the RCMs capture the large-scale climate variation from coast to coast and from south to north similarly, their outputs can differ substantially in some regions. We propose a Bayesian hierarchical model to synthesize information from the ensemble of RCMs, and we construct a consensus climate signal …
Assessment Of Length Distributions Between Non-Coding And Coding Sequences Amongst Two Model Organisms, Ren Zhang, Rachel Caldwell, Yan-Xia Lin
Assessment Of Length Distributions Between Non-Coding And Coding Sequences Amongst Two Model Organisms, Ren Zhang, Rachel Caldwell, Yan-Xia Lin
Associate Professor Yan-Xia Lin
No abstract provided.
An Assessment Tool For E-Government System Performance: A Citizen-Centric Model, Shatha A. Al-Haddad, Peter Hyland, Geoffrey Hubona
An Assessment Tool For E-Government System Performance: A Citizen-Centric Model, Shatha A. Al-Haddad, Peter Hyland, Geoffrey Hubona
Associate Professor Peter Hyland
Governments worldwide have, increasingly, implemented e-government initiatives for their potential significant benefits; among which, delivering better services to citizens through increasing citizens' convenience, satisfaction, and independence; and saving their time, effort, and cost. Achieving each benefit is an objective to these governments and fulfilling each objective is considered a critical success factors. Hence, governments need to assess the extent to which they were able to obtain their preset goals. This study merely focuses on the citizens' perspective of the evaluation. However, the literature seems to lack studies that propose such a sufficient evaluation tool that has been reliably validated. Therefore, …
Communicating Quantitative Literacy: An Examination Of Open-Ended Assessment Items In Timss, Nals, Ials, And Pisa, Karl Kosko, Jesse Wilkins
Communicating Quantitative Literacy: An Examination Of Open-Ended Assessment Items In Timss, Nals, Ials, And Pisa, Karl Kosko, Jesse Wilkins
Karl W Kosko
Quantitative Literacy (QL) has been described as the skill set an individual uses when interacting with the world in a quantitative manner. A necessary component of this interaction is communication. To this end, assessments of QL have included open-ended items as a means of including communicative aspects of QL. The present study sought to examine whether such open-ended items typically measured aspects of quantitative communication, as compared to mathematical communication, or mathematical skills. We focused on public-released items and rubrics from four of the most widely referenced assessments: the Third International Mathematics and Science Study (TIMSS-95): the National Adult Literacy …
How To Make Teaching Of Statistics More Effective In Business Schools?, Kuldeep Kumar
How To Make Teaching Of Statistics More Effective In Business Schools?, Kuldeep Kumar
Kuldeep Kumar
Statistics is taught in almost all Business Schools as a core course and prerequisite to may advance economics, finance and accountancy courses. However, Statistics has to be taught in a different way in Business Schools as compared to how it is taught in their own statistics department. There should be more emphasis on applications in Business area rather than theory. There has been lot of interest in teaching of statistics in Business schools for a very long time, for example see Cox (1965), Moore (1976) and Love and Hildebrand (2002). This paper discusses author's experience of teaching statistics in an …
Water And Poverty In Rural China: Developing An Instrument To Assess The Multiple Dimensions Of Water And Poverty, Alasdair Cohen, Caroline A. Sullivan
Water And Poverty In Rural China: Developing An Instrument To Assess The Multiple Dimensions Of Water And Poverty, Alasdair Cohen, Caroline A. Sullivan
Professor Caroline A Sullivan
This paper describes the theoretical foundations and development of a multidimensional, water-focused, thematic indicator of rural poverty: The Water, Economy, Investment and Learning Assessment Indicator (WEILAI). The WEILAI approach was specifically designed for application in rural China, to support poverty alleviation project planning, monitoring and evaluation, as well as targeting and prioritization. WEILAI builds primarily on the basic needs framework of poverty alleviation, and on the methodological structure of the Water Poverty Index, to provide a proxy measure of an area's poverty by assessing eight key poverty sectors, with a strong focus on the components of water-poverty. The WEILAI approach …
Basic Math Skills: Can High School Students Do The Math?, Samantha Sebastian
Basic Math Skills: Can High School Students Do The Math?, Samantha Sebastian
Leah A. Nillas
This article examined high school students’ basic mathematics skills. 126 Students participated in a study that lasted ten weeks in which a pretest and post-test were taken. In between the tests, students took weekly quizzes to refresh and relearn the following basic mathematics skills: adding, subtracting, multiplying, and dividing whole numbers, decimals, and fractions; proportions; conversion between percents, decimals, and fractions; and order of operations. The scores of the pretest and post-test were analyzed to see if improvements were made. Scores were compared by gender and grade level. The study showed an overall improvement on students’ ability to do basic …
Reading Rainbow: Assessing Effectiveness In Literacy Technology, Liz Russ, Erin Meehan
Reading Rainbow: Assessing Effectiveness In Literacy Technology, Liz Russ, Erin Meehan
Leah A. Nillas
“Children’s Television Workshop and the University of Nebraska created a program, ‘Reading Rainbow’ to promote recreational reading in early readers” (Tarnauskas, 1995). Since its creation, this literacy technology has thrilled and delighted first and second grade audiences, but little to no research has been done on the effectiveness of this program. What is the outcome of the Reading Rainbow program on students’ literacy? This research study investigated the effect of the Reading Rainbow program on literacy of 21 diverse first grade students. Data was obtained through qualitative methods including observations and focus group interviews with students, as well as interviews …