International Journal of Instruction, v12 n3 p271-288 Jul 2019. 18 pp.
English for Academic Purposes, Student Attitudes, Learning Experience, Academic Achievement, Student Needs, Engineering Education, Industrial Education, Learning Motivation, Student Educational Objectives, Foreign Countries, Needs Assessment, Psychological Needs, English Instruction, Instructional Design, College Students, and Indonesia
There are two prominent constraints of students' needs analysis; first, the identification of needs in teaching English for Academic Purposes (EAP) merely focuses on two main dimensions, namely target needs and learning needs, and less to involve affective factors as the basis of all (including learning experience and achievement motivation). Second, there is a common notion that EAP learning is considered the same as general English so that the development of learning design often leads to English for General Academic Purposes (EGAP). This study aims to identify students' perception of learning experience and motivation for the prototype of learners' needs of English for Academic Purposes (EAP) in Industrial engineering. Data were collected from 40 students using three types of questionnaires, namely about learning experiences, learning motivation, and learners' needs. The data of learners' needs was also taken from 8 lecturers as well as program managers. By using quantitative and descriptive analysis, this study showed that first, the students had reasonable learning experience, by being able to participate in the EAP program. Second, the students had strong motivation in achieving their goals. Third, the relationship between learning experience and achievement motivation was not significant and was not quite strong, implying that learning experiences were predicted not to affect students' learning motivation. Fourth, the students' needs lead to English for Specific Academic Purposes (ESAP) which is thus contradictory with the previous notion.
Yrjönsuuri, Varpu, Kangas, Kaiju, Hakkarainen, Kai, and Seitamaa-Hakkarainen, Pirita
Design and Technology Education, v24 n2 2019. 22 pp.
Design, Elementary School Students, Student Projects, Teaching Methods, Cooperative Learning, Video Technology, Models, Foreign Countries, Active Learning, Workshops, Technology Education, Teamwork, Thinking Skills, and Finland (Helsinki)
Co-invention projects in elementary school engage pupils in complex, open-ended design tasks in a practical, hands-on way. Physical materials are an intrinsic part of design, involving trasformation of conceptual ideas into material forms, such as prototypes. These tangible objects mediate embodied thinking and act as material-social mediators of knowledge creation processes. However, the material properties of the designed artifact and pupils' varying skills and levels of material knowledge constrain the design process. While previous studies of materiality in design have mainly focused on adults, this study aims to analyze and describe the different roles of material prototyping in an elementary school collaborative design process. A co-invention process was conducted in a Finnish elementary school during spring 2017, with the task of designing solutions for everyday problems. The data consisted of six video recorded design sessions, where small teams of 5th graders prototyped their inventions. We analyzed the video data across macro-, intermediate-, and micro-levels. The results revealed that pupils used prototypes as mediators for ideation and collaboration. They tested their ideas with prototyping, and material manipulation occurred during collaborative ideation. Material representations supported the verbalization and demonstration of ideas. Some challenges also emerged; prototype construction was a slow and laborious process, the division of labor tended to be unevenly distributed, and the model took a dominant role over the designed artifact. We conclude that support from the teacher and the learning environment is critical for utilizing the full potential of material manipulation in an elementary school setting.
Polo-Lopez, Lucas, Masa-Campos, Jose L., and Ruiz-Cruz, Jorge A.
International Journal of RF and Microwave Computer-Aided Engineering. Dec 2019, Vol. 29 Issue 12, n/a
Satellite communications, Antennas (Electronics) -- Design and construction, Waveguides -- Design and construction, Sintering, 3D printing, and Computer-aided design
Keywords: additive manufacturing; fused filament fabrication; phase shifter; reconfigurable; selective laser sintering; waveguide Abstract This work presents the design and manufacturing of a K-band reconfigurable phase shifter completely implemented in waveguide technology for reduced insertion loss, good matching, and large phase shifting range. The device is based on the combination of a short slot coupler and two tunable reactive loads implemented as a section of short-circuited waveguide where an adjustable metallic post is inserted. Three prototypes of this design have been manufactured using different techniques (conventional computer numerical control machining, a low-cost fused filament fabrication technique and direct metal laser sintering) in order to assess its performance for different applications. The prototypes have been characterized experimentally and the achieved results are evaluated and compared. The proposed phase shifter, since it is fully developed in waveguide technology, eliminates the need of adding transitions to planar structures in order to integrate lumped components like pin diodes or varactors. Therefore, this device has a great potential in high-power beam steering phased arrays. Biographical information: Lucas Polo-Lopez received the BSc and MSc degrees in Telecommunication Engineering from the Universidad Autonoma de Madrid, Madrid, Spain in 2014 and 2016, respectively. Since 2015 he has been with the Radiofrequency Circuits, Antennas and Systems (RFCAS) group of this same university, where he works toward the PhD degree. His current research interests include the computer-aided design of horn antennas and passive waveguide devices, as well as the application of additive manufacturing techniques to the construction of waveguide devices. Jose L. Masa-Campos received the Master degree in 1999 and the PhD Degree in 2006, from the Universidad Politecnica de Madrid, Spain. From 1999 to 2003 he developed his professional activity in the R&D department of the company RYMSA with the design of base station antennas for mobile communications and satellite antennas. From 2002 to 2003 he directed the R&D department of RYMSA. From 2003 to 2007, he worked as Researcher for Universidad Politecnica de Madrid, and in 2005 he joined to Universidad Autonoma de Madrid as Associate Professor in the Radiofrequency Circuits, Antennas and Systems (RFCAS) group. His main current research interests are in active and passive planar array antennas. Jorge A. Ruiz-Cruz received the Ingeniero de Telecomunicacion degree and the PhD degree from the Universidad Politecnica de Madrid, Madrid, Spain, in 1999 and 2005, respectively. Since 2006, he has been with the Universidad Autonoma de Madrid, Madrid, where he became an Associate Professor in 2009. His current research interests include the computer-aided design of microwave passive devices and circuits (filters, multiplexers, and orthomodes). Byline: Lucas Polo-Lopez,Jose L. Masa-Campos,Jorge A. Ruiz-Cruz
Byline: Mohamed Farid Shehab, Nabila Mohammed Abdel Hamid, Nevien Abdullatif Askar, Ahmed Mokhtar Elmardenly Keywords: CAD-CAM, electron beam melting; immediate mandibular reconstruction; patient-specific titanium mesh; rapid prototyping Abstract Background Immediate mandibular reconstruction was performed using a patient-specific titanium mesh tray fabricated by electron beam melting (EBM) /rapid prototyping techniques. Methods Patient-specific titanium trays were virtually designed and fabricated using EBM technology/rapid prototyping for patients requiring mandibular resection and immediate reconstruction using an iliac crest bone graft. Dental implants were placed in the grafted sites and the patients received prosthetic rehabilitation with a follow-up of one year. Clinical data, postoperative bone formation and complications were evaluated. Results A symmetric appearance of facial contours was achieved. The titanium tray incorporated the particulate iliac crest bone graft that provided significant bone formation (mean 18.97 [+ or -] 1.45 mm) and predictable results. Stability of the dental implants was achieved. Conclusion The patient-specific titanium meshes and immediate particulate autogenous bone graft showed satisfactory clinical and surgical results in improving patients' quality of life and decreasing the overall treatment time with adequate functional rehabilitation.
Schaeffer, Jennie Andersson and Palmgren, Marianne
Design and Technology Education, v22 n1 2017. 16 pp.
Novices, Design, Teaching Methods, Context Effect, Workshops, Learning Processes, Competence, Experiential Learning, Information Sources, Undergraduate Study, Foreign Countries, Freehand Drawing, Human Body, Space Utilization, Learning Activities, Museums, and Sweden
In information design education, we strive to find methods that provide students with opportunities to explore different ways of learning and designing. We seek to support development of contextual competences that will be helpful in navigating an unknown future of design in society. A challenge in today's design education is to formulate and use methods that support design students in developing competencies in the space between basic form training and context-rich training. The aim of this study was to evaluate prototyping exercises in design education where the focus was in that in-between space. The study is based on 33 prototyping workshops done between 2008 and 2015 and involving 160 students and two design teachers. Four different approaches to prototyping exercises are described, examined and evaluated: "spatial prototyping," "multi-material prototyping," "physical prototyping," and a mix between the latter two, "physical multi-material prototyping." The results show that the prototyping exercises did support the learning of diverse competencies in the in-between space of basic form training and context training. However, the exercises were also counterproductive and met with different kinds of resistance. The results of the study invite to a dialogue on how different prototyping techniques can stimulate learning in relation to future design competences.
Dorozynski, Przemyslaw, Jamroz, Witold, Wegiarz, Wladyslaw P., Kulinowski, Wojciech, Zaborowski, Mateusz, and Kulinowski, Piotr
Dissolution Technologies. Nov 2018, Vol. 25 Issue 4, p48, 6 p.
3D printing and Testing equipment
INTRODUCTION The number of studies concerning application of three dimensional (3D) printing techniques in pharmaceutical technology has grown continuously since 2005, but the main interest in application of these techniques [...] Purpose of the research was to assess feasibility of fused deposition techniques (3D printing) for development of analytical equipment dedicated for specific dosage forms and for nonstandard applications. Dissolution profiles as well as 3D magnetic resonance imaging (MRI) of the buccal tablets during hydration in dissolution medium were analyzed. The principal result of the study was the first working example of rapid 3D prototyping of dedicated, MRI-compatible dissolution equipment for mucoadhesive buccal tablets. Rapid prototyping techniques were found to be a fast, inexpensive way to develop a dedicated dissolution testing setup. KEYWORDS: additive manufacturing, 3D printing, solid free-form fabrication, buccal bioadhesive tablets, 3D ultrashort echo time magnetic resonance imaging (3D UTE MRI), pharmaceutical dissolution testing equipment