Comment on “Minimal Energy Cost for Thermodynamic Information Processing: Measurement and Information Erasure”

2010 ◽  
Vol 104 (19) ◽  
Author(s):  
Raoul Dillenschneider ◽  
Eric Lutz
Keyword(s):  
Information Processing ◽  
Energy Cost ◽  
Minimal Energy ◽  
Minimal Energy Cost ◽  
Processing Measurement ◽  
Information Erasure

Scheduling of a Single Flow Shop for Minimal Energy Cost Under Real-Time Electricity Pricing

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Hao Zhang ◽  
Fu Zhao ◽  
John W. Sutherland
Keyword(s):  
Real Time ◽  
Energy Cost ◽  
Flow Shop ◽  
Control Strategies ◽  
Night Shift ◽  
Minimal Energy ◽  
Electricity Cost ◽  
Minimal Energy Cost ◽  
Time Periods ◽  
Single Flow

A time-indexed integer programing approach is developed to optimize the manufacturing schedule of a factory for minimal energy cost under real-time pricing (RTP) of electricity. The approach is demonstrated using a flow shop operating during different time periods (i.e., day shift, swing shift, and night shift) in a microgrid, which also serves residential and commercial users. Results show that electricity cost can be reduced by 6.2%, 12.3%, and 21.5% for the three time periods considered, respectively. Additionally, a 6.3% cost reduction can be achieved by the residential and commercial buildings through adopting energy-conscious control strategies in this specific case study example.

scholarly journals Minimal energy cost of entanglement extraction

Quantum ◽  
2019 ◽  
Vol 3 ◽  
pp. 165 ◽  
Author(s):  
Lucas Hackl ◽  
Robert H. Jonsson
Keyword(s):  
Ground State ◽  
Energy Cost ◽  
Large Range ◽  
Entanglement Entropy ◽  
Quadratic System ◽  
Product State ◽  
Minimal Energy ◽  
Energy Increase ◽  
Physical Systems ◽  
Minimal Energy Cost

We compute the minimal energy cost for extracting entanglement from the ground state of a bosonic or fermionic quadratic system. Specifically, we find the minimal energy increase in the system resulting from replacing an entangled pair of modes, sharing entanglement entropy ΔS, by a product state, and we show how to construct modes achieving this minimal energy cost. Thus, we obtain a protocol independent lower bound on the extraction of pure state entanglement from quadratic systems. Due to their generality, our results apply to a large range of physical systems, as we discuss with examples.

scholarly journals The Central Nervous System Does Not Minimize Energy Cost in Arm Movements

2010 ◽  
Vol 104 (6) ◽  
pp. 2985-2994 ◽  
Author(s):  
Dinant A. Kistemaker ◽  
Jeremy D. Wong ◽  
Paul L. Gribble
Keyword(s):  
Force Field ◽  
Energy Cost ◽  
Degrees Of Freedom ◽  
Muscle Activation ◽  
Arm Movements ◽  
Dominant Factor ◽  
Minimal Energy ◽  
Null Field ◽  
Muscle Activation Patterns ◽  
Point To Point

It has been widely suggested that the many degrees of freedom of the musculoskeletal system may be exploited by the CNS to minimize energy cost. We tested this idea by having subjects making point-to-point movements while grasping a robotic manipulandum. The robot created a force field chosen such that the minimal energy hand path for reaching movements differed substantially from those observed in a null field. The results show that after extended exposure to the force field, subjects continued to move exactly as they did in the null field and thus used substantially more energy than needed. Even after practicing to move along the minimal energy path, subjects did not adapt their freely chosen hand paths to reduce energy expenditure. The results of this study indicate that for point-to-point arm movements minimization of energy cost is not a dominant factor that influences how the CNS arrives at kinematics and associated muscle activation patterns.

scholarly journals Information erasure without an energy cost

2011 ◽  
Vol 467 (2130) ◽  
pp. 1770-1778 ◽  
Author(s):  
Joan A. Vaccaro ◽  
Stephen M. Barnett
Keyword(s):  
Angular Momentum ◽  
Energy Cost ◽  
Second Law Of Thermodynamics ◽  
Memory Device ◽  
Conserved Quantity ◽  
Mechanical Work ◽  
Minimum Amount ◽  
Second Law ◽  
Total Entropy ◽  
Information Erasure

Landauer argued that the process of erasing the information stored in a memory device incurs an energy cost in the form of a minimum amount of mechanical work. We find, however, that this energy cost can be reduced to zero by paying a cost in angular momentum or any other conserved quantity. Erasing the memory of Maxwell’s demon in this way implies that work can be extracted from a single thermal reservoir at a cost of angular momentum and an increase in total entropy. The implications of this for the second law of thermodynamics are assessed.

scholarly journals The Energy Use Associated with Neural Computation in the Cerebellum

2009 ◽  
Vol 30 (2) ◽  
pp. 403-414 ◽  
Author(s):  
Clare Howarth ◽  
Claire M Peppiatt-Wildman ◽  
David Attwell
Keyword(s):  
Information Processing ◽  
Energy Cost ◽  
Energy Supply ◽  
Energy Use ◽  
Neural Computation ◽  
Inhibitory Neurons ◽  
Vessel Area ◽  
Processing Power ◽  
Motor Information ◽  
Molecular Layers

The brain's energy supply determines its information processing power, and generates functional imaging signals, which are often assumed to reflect principal neuron spiking. Using measured cellular properties, we analysed how energy expenditure relates to neural computation in the cerebellar cortex. Most energy is used on information processing by non-principal neurons: Purkinje cells use only 18% of the signalling energy. Excitatory neurons use 73% and inhibitory neurons 27% of the energy. Despite markedly different computational architectures, the granular and molecular layers consume approximately the same energy. The blood vessel area supplying glucose and O2 is spatially matched to energy consumption. The energy cost of storing motor information in the cerebellum was also estimated.

Language processing is not a race against time

2016 ◽  
Vol 39 ◽  
Author(s):  
Giosuè Baggio ◽  
Carmelo M. Vicario
Keyword(s):  
Information Processing ◽  
Human Brain ◽  
Language Processing ◽  
Cognitive Functions ◽  
Memory Systems ◽  
Language System ◽  
Moderating Factors

AbstractWe agree with Christiansen & Chater (C&C) that language processing and acquisition are tightly constrained by the limits of sensory and memory systems. However, the human brain supports a range of cognitive functions that mitigate the effects of information processing bottlenecks. The language system is partly organised around these moderating factors, not just around restrictions on storage and computation.

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