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Entropy, Volume 21, Issue 8

August 2019 - 97 articles

Cover Story: Calculating the entropy of a liquid is problematic because of its strong interactions, many degrees of freedom, and highly variable structure. Our approach is to partition the system into rigid-body units at multiple length scales that vibrate within local energy wells. The vibrational component of entropy is calculated from forces and torques in a molecular dynamics simulation, and the entropy associated with different energy wells is calculated from the contacts between units in the simulation. In each case, correlations are taken into account between bonded units. The resulting entropies agree closely with those determined experimentally for a wide range of industrially important liquids and reveal the entropy contributions from the different degrees of freedom. View this paper
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Articles (97)

  • Article
  • Open Access
3,247 Views
9 Pages

20 August 2019

The present study deals with the anomalous heat capacity peak and thermal conductivity of BaVS 3 near the metal-insulator transition present at 69 K. The transition is related to a structural transition from an orthorhombic to monoclinic phas...

  • Article
  • Open Access
12 Citations
4,250 Views
14 Pages

20 August 2019

Obstructive sleep apnea (OSA) syndrome is a common sleep disorder. As an alternative to polysomnography (PSG) for OSA screening, the current automatic OSA detection methods mainly concentrate on feature extraction and classifier selection based on ph...

  • Article
  • Open Access
3 Citations
5,171 Views
13 Pages

Turbo Decoder Design based on an LUT-Normalized Log-MAP Algorithm

  • Jun Li,
  • Xiumin Wang,
  • Jinlong He,
  • Chen Su and
  • Liang Shan

20 August 2019

Turbo codes have been widely used in wireless communication systems due to their good error correction performance. Under time division long term evolution (TD-LTE) of the 3rd generation partnership project (3GPP) wireless communication standard, a L...

  • Article
  • Open Access
102 Citations
5,894 Views
24 Pages

Suggested Integral Analysis for Chaos-Based Image Cryptosystems

  • Miguel Angel Murillo-Escobar,
  • Manuel Omar Meranza-Castillón,
  • Rosa Martha López-Gutiérrez and
  • César Cruz-Hernández

20 August 2019

Currently, chaos-based cryptosystems are being proposed in the literature to provide confidentiality for digital images, since the diffusion effect in the Advance Encryption Standard (AES) algorithm is weak. Security is the most important challenge t...

  • Feature Paper
  • Article
  • Open Access
10 Citations
3,792 Views
19 Pages

20 August 2019

Thermally induced non-equilibrium gas flows have been simulated in the present study by coupling kinetic and extended thermodynamic methods. Three different types of thermally induced gas flows, including temperature-discontinuity- and temperature-gr...

  • Article
  • Open Access
11 Citations
3,840 Views
11 Pages

19 August 2019

Coherence is associated with transient quantum states; in contrast, equilibrium thermal quantum systems have no coherence. We investigate the quantum control task of generating maximum coherence from an initial thermal state employing an external fie...

  • Article
  • Open Access
7 Citations
4,733 Views
12 Pages

18 August 2019

Some uncertainty about flipping a biased coin can be resolved from the sequence of coin sides shown already. We report the exact amounts of predictable and unpredictable information in flipping a biased coin. Fractional coin flipping does not reflect...

  • Article
  • Open Access
14 Citations
4,727 Views
24 Pages

18 August 2019

Direct left turns (DLTs) could cause traffic slowdown, delay, stops, and even accidents on intersections, especially on no-median roads. Channelization and signalization can significantly diminish negative impact of DLTs. In China, a total of 56 larg...

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Entropy - ISSN 1099-4300