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Symmetry, Volume 12, Issue 9

September 2020 - 198 articles

Cover Story: Photomechanical molecular crystals can convert light energy to mechanical energy directly with large elastic moduli, energy densities, and fast response times. The responses are the result of diverse symmetry breaking due to photoirradiation. The picture illustrates photoinduced expansion and contraction, bending, twisting, and rachet-like rotational motion. The ability of these high-symmetry structures to undergo symmetry breaking motion will continue to generate new science and new technological applications for organic crystalline materials. View this paper.
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Articles (198)

  • Article
  • Open Access
26 Citations
4,512 Views
13 Pages

22 September 2020

Mobile robots have various applications in agriculture, autonomous cars, industrial automation, planetary exploration, security, and surveillance. The generation of the optimal smooth path is a significant aspect of mobile robotics. An optimal path f...

  • Article
  • Open Access
7 Citations
3,097 Views
17 Pages

22 September 2020

Generally, simulation models are constructed to replicate and predict the behavior of real systems that currently exist or are expected to exist in the future. Once a simulation model is implemented, the model can be connected to a real system for wh...

  • Article
  • Open Access
12 Citations
3,563 Views
12 Pages

22 September 2020

Transformations, including symmetry and rotations, are important in solving mathematical problems. Meta-cognitive functions are considered critical in solving mathematical problems. In the current study, we examined prospective teachers’ use of...

  • Article
  • Open Access
82 Citations
6,339 Views
19 Pages

Enhanced Hand-Oriented Activity Recognition Based on Smartwatch Sensor Data Using LSTMs

  • Sakorn Mekruksavanich,
  • Anuchit Jitpattanakul,
  • Phichai Youplao and
  • Preecha Yupapin

22 September 2020

The creation of the Internet of Things (IoT), along with the latest developments in wearable technology, has provided new opportunities in human activity recognition (HAR). The modern smartwatch offers the potential for data from sensors to be relaye...

  • Article
  • Open Access
8 Citations
9,207 Views
21 Pages

22 September 2020

Reusable launch vehicles (RLVs) are a solution for effective and economic transportation in future aerospace exploration. However, RLVs are limited to being used under simple landing conditions (small landing velocity and angle) due to their poor ada...

  • Article
  • Open Access
8 Citations
2,948 Views
11 Pages

22 September 2020

The variety of viscoelastic systems and structures, for the most part, is studied analytically, with significant results. As a result of analytical, numerical and experimental research, which was conducted on a larger variety of linear viscoelastic s...

  • Article
  • Open Access
7 Citations
2,993 Views
12 Pages

An Efficient Network Resource Management in SDN for Cloud Services

  • Myunghoon Jeon,
  • Namgi Kim,
  • Yehoon Jang and
  • Byoung-Dai Lee

21 September 2020

With the recent advancements in cloud computing technology, the number of cloud-based services has been gradually increasing. Symmetrically, users are asking for quality of experience (QoE) to be maintained or improved. To do this, it has become nece...

  • Article
  • Open Access
2 Citations
2,182 Views
20 Pages

On Product of Smooth Neutrosophic Topological Spaces

  • Kalaivani Chandran,
  • Swathi Sundari Sundaramoorthy,
  • Florentin Smarandache and
  • Saeid Jafari

21 September 2020

In this paper, we develop the notion of the basis for a smooth neutrosophic topology in a more natural way. As a sequel, we define the notion of symmetric neutrosophic quasi-coincident neighborhood systems and prove some interesting results that fit...

  • Article
  • Open Access
3 Citations
3,033 Views
19 Pages

Stuck Knots

  • Khaled Bataineh

21 September 2020

Singular knots and links have projections involving some usual crossings and some four-valent rigid vertices. Such vertices are symmetric in the sense that no strand overpasses the other. In this research we introduce stuck knots and links to represe...

  • Article
  • Open Access
6 Citations
3,730 Views
17 Pages

21 September 2020

The present study reports a reconstruction scheme for f(R) gravity with the scale factor a(t)∝(t*−t)2c2 describing the pre-bounce ekpyrotic contraction, where t* is the big crunch time. The reconstructed f(R) is used to derive expressions...

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Symmetry - ISSN 2073-8994