scholarly journals Automatic paper pattern making using mechanical development method of a curved surface on a plane surface.

1989 ◽  
Vol 45 (10) ◽  
pp. 427-434 ◽  
Author(s):  
Haruki Imaoka ◽  
Atsuo Shibuya ◽  
Noboru Aisaka
Keyword(s):  
Plane Surface ◽  
Curved Surface ◽  
Development Method

Skew quadrilateral membrane folding for lampshade design

2015 ◽  
Author(s):  
Hirotaka Suzuki
Keyword(s):  
Plane Surface ◽  
Curved Surface ◽  
Building Roof ◽  
Beneficial Use ◽  
Luminance Distribution ◽  
Similar Shape ◽  
Pattern Structure ◽  
Parallel Lines ◽  
Paper Folding

Historically, Japanese traditional lampstand 'Andon', was manufactured from paper. And paper folding method was adopted into some Andon or western lampshade design. For example, Yoshimura/Diamond pattern, known as a structure of crashed cylinder, or a structure of building roof, that has been of beneficial use in commercial lampshade products. Yoshimura pattern structure includes a set of skew quadrilaterals which are not on a plane surface and each quadrilateral is constructed with 2 planar triangles. Development of Yoshimura pattern is constructed by one set of horizontal parallel lines at even intervals for valley fold and two sets of oblique parallel lines at even intervals for mountain fold. The author found that similar shape can be constructed from development which includes only mountain fold lines of Yoshimura pattern and this method has various applications. With proposed paper folding method, each skew quadrilateral is constructed by single curved surface. In this paper, the author first defined the principle of the proposed paper folding method, second, explained the. features of the shape made by the proposed method and the luminance distribution on the shape, third, indicated examples of applications of the proposed method. Finally, examples of application of the shape made by SQMF in the field of education are explained.

The laminar wall-jet over a curved surface

1968 ◽  
Vol 31 (3) ◽  
pp. 459-465 ◽  
Author(s):  
I. J. Wygnanski ◽  
F. H. Champagne
Keyword(s):  
Laminar Flow ◽  
Velocity Profile ◽  
Skin Friction ◽  
Surface Pressure ◽  
Similarity Solution ◽  
Plane Surface ◽  
Curved Surface ◽  
Radius Of Curvature ◽  
Wall Jet ◽  
The One

The laminar flow of a wall jet over a curved surface is considered. A unique similarity solution is obtained for both concave and convex surfaces when the local radius of curvature is proportional to x3/4. This solution satisfies a similar invariant condition to the one derived by Glauert for the wall jet over a plane surface. The variation of the shape of the velocity profile, the skin friction, and the surface pressure as a function of curvature is given.

Measurement and Characterization of Stiction Force in Microstructures With Tapered Features

2011 ◽  
Author(s):  
Christopher Pelzmann ◽  
Laxman Saggere
Keyword(s):  
Plane Surface ◽  
Van Der Waals ◽  
Theoretical Models ◽  
Adhesive Force ◽  
Van Der Waals Force ◽  
Curved Surface ◽  
Force Model ◽  
Curved Surfaces ◽  
Surface Geometry ◽  
Adhesive Forces

Modeling and measurement of stiction or adhesion due to van der Waals force between microstructures and micro-gripper tools are important for contact-based manipulation and assembly of microstructures. Microfabricated structures commonly feature rough tapered curved surfaces due to undercutting and surface alterations inherent in the microfabrication processes. While several theoretical models exist for calculating adhesive forces between microstructures featuring spherical, cylindrical and flat surfaces, a model for estimating adhesive forces between microstructures featuring tapered curved surfaces is lacking in the literature. This paper presents experimentally measured values of adhesion or pull-off force between a rough tapered curved microstructure from a rough plane surface using a custom micro-cantilever beam as a force sensing mechanism. The paper also introduces an approach to estimate adhesive force between a tapered curved surface and a flat surface by considering the tapered curved surface as a frustum of a cone bound between two cylinders and using the van der Waals force model for cylinders. It is shown that the experimentally measured adhesive force values lie within the upper and lower values of the theoretically estimated van der Waals force values for the two cylinders that define the tapered curved surface geometry.

Developing Science Teaching Material to Increase Elementary Students’ Science Process Skill

2019 ◽  
Vol 2 (1) ◽  
pp. 53
Author(s):  
Ai Hayati Rahayu ◽  
Bunyamin Faisal Syarifudin
Keyword(s):  
Research And Development ◽  
Elementary Students ◽  
Teaching Material ◽  
Learning Material ◽  
Development Method ◽  
Process Skill ◽  
Science Process Skill ◽  
The Mean ◽  
Problem Solving Process ◽  
Development Of Students

Mastering science process skill is very beneficial in problem solving process. This research aimed to develop teaching materials such as science process skill-based textbooks on energy and its changes. The method used in this research was research and development, by using the 4D design, which include define, design, develop, and disseminate. Research and development method were used to produce a product and to test its efficiency. The result showed that the learning material fulfill the assessment criteria. The mean validation result of textbook showed a number of 3.58 indicated as a good category. Based on T test, it was proven that the use of textbooks is indeed influential towards the development of students’ science process skill.

PENGEMBANGAN BAHAN AJAR TEKS DRAMA BERDASARKAN PENGALAMAN PENGARANG

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Didin Khaerudin ◽  
Suherli Kusmana ◽  
Iyay Robia Khaerudin
Keyword(s):  
Personal Experience ◽  
Teaching Materials ◽  
Learning Skills ◽  
Student Activities ◽  
Development Method ◽  
Average Value ◽  
Surrounding Environment ◽  
Basic Competencies ◽  
Materials Used ◽  
Minimum Criteria

Research conducted to develop drama text teaching materials based on the experience of the author of the drama script aims to make it easier for students to understand drama text material. In addition, based on the author's experience students are expected to emulate the author's creative process in writing a paper. The research method used in this research is the research and development method. Based on the results of the interview it can be concluded that the ability to write drama is determined based on mastery of the elements of drama and the ability to develop stories based on the author's experience. The process of writing drama is done in several steps: (1) searching for ideas based on personal experience, other people, or the surrounding environment; (2) processing ideas to find plots (characters), characters or characters that vary with their inner conflicts, settings and dialogues, interesting conflicts, and messages to be conveyed; (3) starts the process of writing drama with stages and elements of drama; (4) revision of drama products. Teaching material developed is presented from basic competencies of knowledge and basic competencies of learning skills. Based on experiments on developed teaching materials it is known that the average value of the ability to write plays gets a score exceeding the minimum criteria, so that the teaching materials used are effective. Based on observations it is known that teaching materials can help students in learning and student activities become more independent, and active.

Proposal of Model-based HMI Development Method for In-vehicle System

2018 ◽  
Vol 138 (11) ◽  
pp. 1435-1443
Author(s):  
Yoshitaka Atarashi ◽  
Manabu Morita ◽  
Norihisa Komoda
Keyword(s):  
Development Method ◽  
Model Based ◽  
Vehicle System
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