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Constructive alignment combines constructive learning theories with aligned curriculum to promote deep learning. Using an action research methodology, this work reflects upon twelve iterations, over 6-years, of a project that aimed to implement constructive alignment using portfolio assessment for teaching introductory programming. Student results and staff reflections are used to highlight factors...
Well-designed formative feedback can enhance both instructor teaching and student learning with "two-way" feedback. The project goal was to use web-enabled tools and resources that facilitate the strategies, practices, and assessments that use frequent formative feedback to improve student attitude, learning, and achievement. The research question is, "What is the effect of formative...
One of the major challenges facing the growth of South Africa, the largest economy in Africa and a member of the five major emerging national economies (BRICS) of the world, is unemployment. While there are other factors influencing unemployment, high dropout rates in universities are seen as a definite contributor to this challenge. Reflection and reflective practices have been extensively researched...
Software professionals routinely use sophisticated problem solving and design skills in their communication with one another and other stakeholders in the software process. We wish to introduce our computer science and software engineering students to the communication challenges of real software development and help them to develop skills to meet these challenges. We describe our guided inquiry approach...
Engineering statics is a gateway course in engineering education that prepares students for subsequent courses such as dynamics and mechanics of materials. However, students may not explicitly voice their concerns or challenges encountered when trying to understand the material due to their unfamiliarity with engineering concepts in statics. Therefore, it is important to explore different venues that...
Learning of threshold concepts in courses such as statics has traditionally been a difficult and critical juncture for students in engineering. Research and other systematic efforts to improve the teaching of statics in recent years range widely, from development of courseware and assessment tools to experiential and other "hands-on" learning techniques. This paper reports a portion of the...
This paper describes a new target identification algorithm adapted for the rules of the Tsukuba Challenge 2013. According to the rules of the Tsukuba Challenge 2013, an autonomous mobile robot has to identify a specific standing signboard while navigating a prescribed course area. With the aim of accomplishing this goal, light detection and ranging (LIDAR) is used to detect both the range and reflection...
A new technique for the analysis and attenuation calculation of sub-millimeter waveguides is proposed in this paper by dividing the domain into several slices, in which the propagation constant ß and impedance Z for each slice were calculated and then used to estimate the overall attenuation as well as the reflection and transmission coefficients. Variations of losses with the waveguide dimensions,...
The aim of this study is to investigate the impact of the variation of the physical and electrical parameters of a biphasic composite structure on the electromagnetic field transmission, reflection and absorption coefficients. These coefficients are the base for the evaluation of the shielding effectiveness of such materials. A systematic analysis is carried out and the relations between the composite...
In this paper, we present measurement results of material penetration loss and reflection coefficient as a function of antenna polarization at 5.8 GHz. The measurements were made in a typical building hallway with a variety of test materials. This is a unique measurement campaign because the same antenna apertures were used to create three different types of polarizations: linear, circular polarized,...
Electromagnetic noise caused by high speed digital and radio frequency electronic devices can affect the normal operation of other devices within the same system and result in significant intra-system electromagnetic interference (EMI) problems. Conformal shielding is an emerging method to prevent EMI by using metallization techniques to coat a thin metal layer around the package. In this study, copper...
PbZr1−x TixO3 (PZT) is an important class of ferroelectrics materials with the ABO3 perovskite-type structure due to their exceptional dielectric and piezoelectric properties. It is well known that PZT ceramics and thin films are sensitive to the level of stress induced by both external elastic and electric fields which fundamentally modifies their physical properties. In order to improve the understanding...
Pulse Reflectometry is a noninvasive technique for probing the properties of cavities and materials. In recent years the acoustic version of pulse reflectometry has been applied successfully to inspection of condensers, boilers, preheaters and other heat exchangers,by sending acoustic pulses into the air enclosed within the tubes and analyzing the reflections created by defects on the internal diameter...
We developed an analytical code to model electromagnetic fields in 3D in a stack of vertical transverse isotropic layers. This code is suitable to model low-frequency as well as high-frequency responses and it is expected to become available as an open source package in 2014. We give an overview of the code and use it to investigate the sensitivity of different Ground Penetrating Radar antenna configurations...
Electromagnetic noise caused by high speed digital and radio frequency electronic devices can affect the normal operation of other devices within the same system and result in significant intra-system electromagnetic interference (EMI) problems. Conformal shielding is an emerging method to prevent EMI by using metallization techniques to coat a thin metal layer around the package. In this study, copper...
Knowledge of the materials' properties of reflection of electromagnetic waves (EMW) is necessary for understanding and modeling propagation, especially inside buildings and in urban areas. This paper presents the results of experimental determinations of these properties for several materials (Aluminium, Melamine Faced Fiberboard, and Gypsum Drywall slabs) in a semi-anechoic chamber, at several frequencies,...
This paper handles a proposed algorithm of surface to air anti stealth technology for homeland security. The paper approach is anti stealth theory and it's application by using fuzzy logic control. the anti stealth is done by exposing stealth EM 3500 wave absorber with non lethal pulsed ND YAG 532 then the electric permittivity enhanced and consequently reflection. The application of surface to air...
A conventional approach to image analysis is to perform separately feature extraction at a low level (such as edge detection) and follow this with high level feature extraction to determine structure (e.g. by collecting edge points using the Hough transform. The original image Ray Transform (IRT) demonstrated capability to extract structures at a low level. Here we extend the IRT to add shape specificity...
The recent improvements in efficiencies for kesterite (copper zinc tin selenide, CZTS) devices warrant an investigation into how the kesterite device stack can best be capped to minimize losses due to reflection. Additionally, ongoing efforts to replace the cadmium sulfide (CdS) layer in copper indium gallium selenide (CIGS)-based devices, most notably with zinc sulfide (ZnS), need to be accompanied...
Most university teachers pay attention to stimulating the students' learning motivation. Moreover, stimulating the students' learning motivation is a capability of IBSTPI (the Internet Board of Standards for Training, Performance and Instruction). In this context, this research aims to design and implement a plan of training activity to enhance university novice teachers' stimulating the students'...
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