Discussion of “A Review of Thickness-Accommodation Techniques in Origami-Inspired Engineering” (Lang, R. J., Tolman, K. A., Crampton, E. B., Magleby, S. P., and Howell, L. L., 2018, ASME Appl. Mech. Rev., 70(1), p. 010805

2018 ◽  
Vol 70 (1) ◽  
Author(s):  
Daniel A. McAdams
Keyword(s):  
Design Research ◽  
Three Dimensional ◽  
Systems Design ◽  
Applied Mechanics ◽  
Engineering Applications ◽  
Traditional Art ◽  
Art Form ◽  
Folding Paper ◽  
Practical Engineering ◽  
The Impact

Origami is a traditional art form that realizes three-dimensional shapes by folding paper sheets. Origami designers use mathematical theorems to support their design efforts. These theorems require a condition of a flat fold on folded sheets. When working with paper, the paper is essentially zero thickness and folds flat. Thus, to access the power of flat-foldability theorems for origami-inspire design, nonzero thickness stiff sheet crease patterns must still be flat foldable. For nonzero thickness sheets as would be used in practical engineering applications, special fold designs are required to allow an effectively flat fold. In this issue of ASME Applied Mechanics Reviews, Lang and co-authors present a review of fold design techniques to enable effectively flat folding of nonzero thickness sheets. In this discussion, the impact of the author's work is highlighted. As well, the contributions of the authors work is situated in the context of origami-inspired systems design. The integration of their work into a systems construct clarifies and motivates the need for further origami-inspired design research.

Geometry-Based Thick Origami Simulation

2020 ◽  
Vol 143 (6) ◽  
Author(s):  
Tsz-Ho Kwok
Keyword(s):  
Three Dimensional ◽  
Geometric Design ◽  
Experimental Results ◽  
Engineering Applications ◽  
3D Shape ◽  
Folding Paper ◽  
Geometric Simulation ◽  
Geometric Formulation

Abstract Origami is the art of creating a three-dimensional (3D) shape by folding paper. It has drawn much attention from researchers, and the designs that origami has inspired are used in various engineering applications. Most of these designs are based on familiar origami patterns and their known deformations, but origami patterns were originally intended for materials of near-zero thickness, primarily paper. To use the designs in engineering applications, it is necessary to simulate origami in a way that enables designers to explore and understand the designs while taking the thickness of the material to be folded into account. Because origami is primarily a problem in geometric design, this paper develops a geometric simulation for thick origami. The actuation, constraints, and assignment of mountain and valley folds in origami are also incorporated into the geometric formulation. The experimental results show that the proposed method is efficient and accurate. The method can successfully simulate a flat-foldable degree-four vertex, two different action origami, the bistable property of a waterbomb base, and the elasticity of non-rigid origami panels.

The Comparative Analysis Research of the Finite Element between Sand Lining Teethed Pile and Smooth Pile

2014 ◽  
Vol 1030-1032 ◽  
pp. 905-907
Author(s):  
Xi Dong Wang ◽  
Yong Fen Ruan
Keyword(s):  
Finite Element ◽  
Comparative Analysis ◽  
Bearing Capacity ◽  
Work Performance ◽  
Three Dimensional ◽  
Working Mechanism ◽  
Engineering Applications ◽  
Soil Displacement ◽  
Practical Engineering ◽  
Pile Settlement

Sand lining teethed pile is a new prestressed pile, and it has been gradually spread and used in Kun Ming of Yun Nan Province, meanwhile, it has achieved better work in practical engineering applications. Compared with common prestressed smooth pile, the working mechanism that tooth of the pile combines with the sand lining of the pile makes bearing capacity and the play speed of bearing capacity have significantly improved. This paper builds a three-dimensional entity pile base model with Midas GTS and analyzes the work performance of two kinds of precast piles from pile settlement and soil displacement around pile aspects. This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Application of Computer Aided Design in Sculpture Art

2014 ◽  
Vol 926-930 ◽  
pp. 1672-1675
Author(s):  
Ni Ben ◽  
Xu Guang Yang ◽  
Peng Lin Li
Keyword(s):  
Computer Technology ◽  
Computer Aided Design ◽  
Rapid Development ◽  
Three Dimensional ◽  
Three Dimension ◽  
Revolutionary Change ◽  
Art And Design ◽  
Traditional Art ◽  
Art Form ◽  
Primary Means

With the rapid development of computer technology, especially with the progress in computer graphics technology, a revolutionary change occurred in urban sculpture, architecture, animation and other art and design field. Three-dimensional computer technology information technology and digital technology also challenged the traditional art of sculpture which takes manual approach to create and produce sculpture works; they provide designers with a new creative fashion and art form. This interdisciplinary technology surpassed the single and limited mode of the traditional tools through turning two-dimension to three-dimension, static to dynamic situations. Large sculptures began to appear in the city with the assistance of computer technology in varying degrees. The programs accurate operating and precise drawing bring strong reliability in sculpture design, which has become the primary means of urban sculpture creation.

scholarly journals “SANJHYA” THE GODDESS TRADITIONAL ART FORM OF INDIAN ART

2021 ◽  
Vol 9 (9) ◽  
pp. 51-54
Author(s):  
Dr.Vikrant Shah Vikrant
Keyword(s):  
Three Dimensional ◽  
Uttar Pradesh ◽  
Living Conditions ◽  
Traditional Art ◽  
Ancient Civilization ◽  
The Earth ◽  
Art Form ◽  
The Family ◽  
Simple Demonstration ◽  
Living Being

If there is any priority for mankind with bread, cloth and house then it will be said to be an expression of his art, his feelings. This is the reason why pre-historic man   has also painted on the walls of caves, which today help historians to understand that ancient civilization are the center of interest of tourists. "Sanjhya" is a very ancient and the goddess traditional art form of Indian. Perhaps it is a spiritual image to connect the divine to the earth. Apart from Madhya Pradesh, "Sanjhya" is spread in the terrain of Punjab, Rajasthan, Uttar Pradesh, and Haryana etc. Most of the women and youth are making Sanjhya in specific art form. The specialty of these folk art is that these are three-dimensional art on wall consider it to be a reflection of simplicity and culture of ordinary living being through his arts.  These artworks show how colorful the imagination of a human can make even a simple straight life. Animals such as peacocks, lions, bears, deer, crocodiles, fish, rivers, mountains, fields, trees, moon are the subjects of their art work, which these community give a multi-colored look on a wall of length and width. These artwork made from unique images of human and divine also. Sanjhya is used on the entrance of the house and on the walls in the courtyard and portrays the family wedding, death or other religious occasions. These pictures are a simple demonstration of the nature and living conditions of these people.

Latent heat storage for hot beverages

2019 ◽  
Vol 13 (3) ◽  
pp. 5653-5664
Author(s):  
M. S. M. Al-Jethelah ◽  
H. S. Dheyab ◽  
S. Khudhayer ◽  
T. K. Ibrahim ◽  
A. T. Al-Sammarraie
Keyword(s):  
Latent Heat ◽  
Food Industry ◽  
Heat Storage ◽  
Food Storage ◽  
Thermal Engineering ◽  
Engineering Applications ◽  
Latent Heat Storage ◽  
The Impact ◽  
Encapsulated Phase Change Material ◽  
Change Material

Latent heat storage has shown a great potential in many engineering applications. The utilization of latent heat storage has been extended from small scales to large scales of thermal engineering applications. In food industry, latent heat has been applied in food storage. Another potential application of latent heat storage is to maintain hot beverages at a reasonable drinking temperature for longer periods. In the present work, a numerical calculation was performed to investigate the impact of utilizing encapsulated phase change material PCM on the temperature of hot beverage. The PCM was encapsulated in rings inside the cup. The results showed that the encapsulated PCM reduced the coffee temperature to an acceptable temperature in shorter time. In addition, the PCM maintained the hot beverage temperature at an acceptable drinking temperature for rational time.

Analyzing the Impact of X-Ray Tomography on the Reliability of Integrated Circuits

2015 ◽  
Author(s):  
Halit Dogan ◽  
Md Mahbub Alam ◽  
Navid Asadizanjani ◽  
Sina Shahbazmohamadi ◽  
Domenic Forte ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
3D Imaging ◽  
Three Dimensional ◽  
Serial Sectioning ◽  
Promising Technique ◽  
Flash Memories ◽  
X Ray ◽  
3D Information ◽  
The Impact

Abstract X-ray tomography is a promising technique that can provide micron level, internal structure, and three dimensional (3D) information of an integrated circuit (IC) component without the need for serial sectioning or decapsulation. This is especially useful for counterfeit IC detection as demonstrated by recent work. Although the components remain physically intact during tomography, the effect of radiation on the electrical functionality is not yet fully investigated. In this paper we analyze the impact of X-ray tomography on the reliability of ICs with different fabrication technologies. We perform a 3D imaging using an advanced X-ray machine on Intel flash memories, Macronix flash memories, Xilinx Spartan 3 and Spartan 6 FPGAs. Electrical functionalities are then tested in a systematic procedure after each round of tomography to estimate the impact of X-ray on Flash erase time, read margin, and program operation, and the frequencies of ring oscillators in the FPGAs. A major finding is that erase times for flash memories of older technology are significantly degraded when exposed to tomography, eventually resulting in failure. However, the flash and Xilinx FPGAs of newer technologies seem less sensitive to tomography, as only minor degradations are observed. Further, we did not identify permanent failures for any chips in the time needed to perform tomography for counterfeit detection (approximately 2 hours).

Designing a creative programming unit within the elementary school core curriculum

2020 ◽  
Author(s):  
Yumiko Murai ◽  
Ryohei Ikejiri ◽  
Yuhei Yamauchi ◽  
Ai Tanaka ◽  
Seiko Nakano
Keyword(s):  
Core Curriculum ◽  
Design Research ◽  
Empirical Studies ◽  
School Curriculum ◽  
Educational Design ◽  
Current Trends ◽  
Educational Design Research ◽  
Creative Learning ◽  
Uncertain Future ◽  
The Impact

Cultivating children’s creativity and imagination is fundamental to preparing them for an increasingly complex and uncertain future. Engaging in creative learning enables children to think independently and critically, work cooperatively, and take risks while actively engaging in problem solving. While current trends in education, such as maker movements and computer science education, are dramatically expanding children’s opportunities for engagement in creative learning, comparatively few empirical studies explore how creative learning can be integrated into the school curriculum. The educational design research described in this paper focuses on a curriculum unit that enables students to engage with creative learning through computer programming activities while meeting curriculum goals. The data provided in this paper were drawn from three classroom tryouts, the results of which were used to drive an iterative design process. This paper also shares several insights on the impact of creative learning in curriculum teaching.

Disorganization of a hole tone feedback loop by an axisymmetric obstacle on a downstream end plate

2014 ◽  
Vol 757 ◽  
pp. 908-942 ◽  
Author(s):  
K. Matsuura ◽  
M. Nakano
Keyword(s):  
Nozzle Exit ◽  
Passive Control ◽  
Control Method ◽  
Three Dimensional ◽  
Acoustic Power ◽  
Shear Layers ◽  
Mean Velocity ◽  
End Plate ◽  
Air Jet ◽  
Practical Engineering

AbstractThis study investigates the suppression of the sound produced when a jet, issued from a circular nozzle or hole in a plate, goes through a similar hole in a second plate. The sound, known as a hole tone, is encountered in many practical engineering situations. The mean velocity of the air jet $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}u_0$ was $6\text {--}12\ \mathrm{m}\ {\mathrm{s}}^{-1}$. The nozzle and the end plate hole both had a diameter of 51 mm, and the impingement length $L_{im}$ between the nozzle and the end plate was 50–90 mm. We propose a novel passive control method of suppressing the tone with an axisymmetric obstacle on the end plate. We find that the effect of the obstacle is well described by the combination ($W/L_{im}$, $h$) where $W$ is the distance from the edge of the end plate hole to the inner wall of the obstacle, and $h$ is the obstacle height. The tone is suppressed when backflows from the obstacle affect the jet shear layers near the nozzle exit. We do a direct sound computation for a typical case where the tone is successfully suppressed. Axisymmetric uniformity observed in the uncontrolled case is broken almost completely in the controlled case. The destruction is maintained by the process in which three-dimensional vortices in the jet shear layers convect downstream, interact with the obstacle and recursively disturb the jet flow from the nozzle exit. While regions near the edge of the end plate hole are responsible for producing the sound in the controlled case as well as in the uncontrolled case, acoustic power in the controlled case is much lower than in the uncontrolled case because of the disorganized state.

scholarly journals Numerical simulation of the impact of an integrated renovation project on the Maowei Sea hydrodynamic environment

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cui Wang ◽  
Ling Cai ◽  
Yaojian Wu ◽  
Yurong Ouyang
Keyword(s):  
Water Exchange ◽  
Land Reclamation ◽  
Three Dimensional ◽  
Exchange Capacity ◽  
Reclamation Project ◽  
Hydrodynamic Environment ◽  
Sea Area ◽  
Water Quality Models ◽  
The Impact ◽  
Main Factor

AbstractIntegrated renovation projects are important for marine ecological environment protection. Three-dimensional hydrodynamics and water quality models are developed for the Maowei Sea to assess the hydrodynamic environment base on the MIKE3 software with high resolution meshes. The results showed that the flow velocity changed minimally after the project, decreasing by approximately 0.12 m/s in the east of the Maowei Sea area and increasing by approximately 0.01 m/s in the northeast of the Shajing Port. The decrease in tidal prism (~ 2.66 × 106 m3) was attributed to land reclamation, and accounted for just 0.86% of the pre-project level. The water exchange half-life increased by approximately 1 day, implying a slightly reduced water exchange capacity. Siltation occurred mainly in the reclamation and dredging areas, amounting to back-silting of approximately 2 cm/year. Reclamation project is the main factor causing the decrease of tidal volume and weakening the hydrodynamics in Maowei Sea. Adaptive management is necessary for such a comprehensive regulation project. According to the result, we suggest that reclamation works should strictly prohibit and dredging schemes should optimize in the subsequent regulation works.

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