On-Site Architectural Drawing with Hand-held Mobile Instructions

The advances in computer-aided design tools have enabled design visualization and realization to become more efficient and effective. However, these fast-growing digital technologies are also gradually reducing the presence of hand drawings in architectural education. This leads to a reduction in the ability to be inspired from the direct observation of the architectural environment through on-site freehand sketching. This study aims to implement digital technology as a teaching aid to retrieve these lost abilities. Analytical drawing is a method that encourages thinking before drawing, laying out the invisible underlying structure, and finalizing it with a visible appearance. This method remains an effective way of three-dimensional visual thinking. Accordingly, this study presents an interactive smartphone application that brings computer-assisted instructions into mobile learning. Promising responses from students revealed that using digital technology as a teaching aid can help to retrieve the lost abilities of visual thinking through on-site sketching.

Development and Implementation of a Mini CNC Milling Machine

The development of mechanical processing machines with integrated CNC systems allows the manufacturing industry to produce complex products quickly with high quality. CNC has become a main course for mechanical students in technical and vocational universities. CNC machine training is required to enhance student’s skills to learning in design and manufacturing technology. However, the cost to buy a CNC machine is not cheap. In a developing country like Vietnam, along with the limited budget of most universities, this is an obstacle for students to have the opportunity to use CNC machines. To help students have a teaching aid in learning, improve practice capacity. The article proposes an alternative to design and manufacture a simple, inexpensive milling machine with all the required functions. The CAD models design of the machine model structure were done using Solidwork and NX software. Most of the machine’s parts are manufactured and assembled in the Faculty of Engineering Mechanics and Automation laboratory of Engineering and Technology, Vietnam National University Hanoi. The study’s main objective is to propose a process for designing and manufacturing a mini vertical 3-axis CNC milling machine with low cost but full features similar to an industrial CNC machine. The machine model introduced in the article can be used as a teaching aid, improving practical capacity for students of machine building

Development of Simple Teaching Aid on Resonance Topic Using Audacity Software as Learning Media

This study aims to develop a simple prop of resonance topic using audacity software. The research was conducted based on the model from Borg and Gall, which involved only five main steps: analyzing the developed product, developing the initial product, expert validation and revision, small-scale field trials and revisions, and large-scale trials and final products. The small-scale and large-scale feasibility tests were given to 29 students of SMAN 5 Palu Class XI IPA6. The product quality data obtained were analyzed using a descriptive analysis from quantitative data into qualitative, then the average quality score was processed using category criteria. In the analysis results, the overall average score of media experts is 2.97, categorized as “Good”. The overall average score from material experts was 3.33, categorized as “Very Good”. While the average analysis result of the overall small-scale trials was 3.35, categorized as “Very Good”, and the result of the overall large-scale trials was 3.39, categorized as “Very Good”. The overall average score obtained in the transformation in table 2 shows that the simple teaching aid on resonance topic using the Audacity software developed by the researcher was feasible to be used as a medium for learning physics in the classroom.

DIGITAL TEACHING AID FOR THE DEVELOPMENT OF SPATIAL AWARENESS FOR CHILDREN WITH MIXED DEVELOPMENTAL DISORDERS

Children with mixed developmental disorders have impaired spatial perception. When performing correction work with these children, it is necessary to look for the most effective means to achieve the maximum developmental result. The use of various non-traditional methods and techniques in teaching eliminates children's fatigue, stimulates their cognitive activity, allows optimizing the pedagogical process, individualizes teaching and significantly improves the effectiveness of pedagogical work in general. One of the ways is digital teaching aids that are systematically and purposefully integrated into correction work.The aim of the paper is to theoretically substantiate the adequacy of the digital teaching aid developed by I. Zulbina for the formation of spatial awareness for children with mixed developmental disorders in preschool.

Illustrating catalysis with a handmade molecular model set: catalytic oxidation of carbon monoxide over a platinum surface

Catalytic converters (automotive catalysts) and the chemical reactions they catalyze appear in general and introductory chemistry textbooks. Although the detailed mechanisms of the chemical reactions that occur in catalytic converters have been clearly revealed via recent developments in surface and computational chemistry research, the description and illustration of the catalysis are still ambiguous in textbooks. In this paper, we describe an extracurricular lecture whereby a handmade teaching aid was employed to illustrate the basic principle of the catalytic oxidation of carbon monoxide over platinum surface, which is an essential reaction occurring in catalytic converters. The teaching aid, constructed combining easily available materials, can illustrate the positions and motions of the molecules on the platinum surface during catalytic oxidation. The lecture was favorably received by non-chemistry majors and high school students. Despite the difficulty of the topic, the audience displayed a relatively high level of understanding.