scholarly journals Decomposable coherence and quantum fluctuation relations

Quantum ◽  
2019 ◽  
Vol 3 ◽  
pp. 202 ◽  
Author(s):  
Erick Hinds Mingo ◽  
David Jennings
Keyword(s):  
Quantum Coherence ◽  
Composite System ◽  
Classical Mechanics ◽  
Newtonian Mechanics ◽  
Early Analysis ◽  
Work Processes ◽  
Temperature Dependent ◽  
Work Process ◽  
Fluctuation Relations ◽  
New Perspective

In Newtonian mechanics, any closed-system dynamics of a composite system in a microstate will leave all its individual subsystems in distinct microstates, however this fails dramatically in quantum mechanics due to the existence of quantum entanglement. Here we introduce the notion of a `coherent work process', and show that it is the direct extension of a work process in classical mechanics into quantum theory. This leads to the notion of `decomposable' and `non-decomposable' quantum coherence and gives a new perspective on recent results in the theory of asymmetry as well as early analysis in the theory of classical random variables. Within the context of recent fluctuation relations, originally framed in terms of quantum channels, we show that coherent work processes play the same role as their classical counterparts, and so provide a simple physical primitive for quantum coherence in such systems. We also introduce a pure state effective potential as a tool with which to analyze the coherent component of these fluctuation relations, and which leads to a notion of temperature-dependent mean coherence, provides connections with multi-partite entanglement, and gives a hierarchy of quantum corrections to the classical Crooks relation in powers of inverse temperature.

scholarly journals Wheel Load and Wheel Pass Frequency as Indicators for Soil Compaction Risk: A Four-Year Analysis of Traffic Intensity at Field Scale

Geosciences ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 292 ◽  
Author(s):  
Katja Augustin ◽  
Michael Kuhwald ◽  
Joachim Brunotte ◽  
Rainer Duttmann
Keyword(s):  
Sugar Beet ◽  
Soil Compaction ◽  
Soil Tillage ◽  
Traffic Intensity ◽  
Agricultural Machinery ◽  
Field Scale ◽  
Work Processes ◽  
Work Process ◽  
Wheel Load ◽  
Subsoil Compaction

Avoiding soil compaction is one of the objectives to ensure sustainable agriculture. Subsoil compaction in particular can be irreversible. Frequent passages by (increasingly heavy) agricultural machinery are one trigger for compaction. The aim of this work is to map and analyze the extent of traffic intensity over four years. The analysis is made for complete seasons and individual operations. The traffic intensity is distinguished into areas with more than five wheel passes, more than 5 Mg and 3 Mg wheel load. From 2014 to 2018, 63 work processes on a field were recorded and the wheel load and wheel passes were modeled spatially with FiTraM. Between 82% (winter wheat) and 100% (sugar beet) of the total infield area is trafficked during a season. The sugar beet season has the highest intensities. High intensities of more than five wheel passes and more than 5 Mg wheel load occur mainly during harvests in the headland. At wheel load ≥3 Mg, soil tillage also stresses the headland. In summary, no work process stays below one of the upper thresholds set. Based on the results, the importance of a soil-conserving management becomes obvious in order to secure the soil for agriculture in a sustainable way.

scholarly journals Not-so-classical mechanics: unexpected symmetries of classical motion

2005 ◽  
Vol 83 (2) ◽  
pp. 91-138 ◽  
Author(s):  
James T Wheeler
Keyword(s):  
Gauge Theories ◽  
Vries Equation ◽  
Classical Mechanics ◽  
Logistic Equation ◽  
Central Force ◽  
Newtonian Mechanics ◽  
Classical Motion ◽  
Recent Interest ◽  
Bohmian Quantum Mechanics ◽  
Force Problem

A survey of topics of recent interest in Hamiltonian and Lagrangian dynamical systems, including accessible discussions of regularization of the central-force problem; inequivalent Lagrangians and Hamiltonians; constants of central-force motion; a general discussion of higher order Lagrangians and Hamiltonians, with examples from Bohmian quantum mechanics, the Korteweg–de Vries equation, and the logistic equation; gauge theories of Newtonian mechanics; and classical spin, Grassmann numbers, and pseudomechanics. PACS No.: 45.25.Jj

Thermal instability in a star—gas system

1995 ◽  
Vol 54 (2) ◽  
pp. 157-172 ◽  
Author(s):  
S. P. Talwar ◽  
M. P. Bora
Keyword(s):  
Heat Loss ◽  
Thermal Effects ◽  
Thermal Instability ◽  
Composite System ◽  
Stellar Dynamics ◽  
Mhd Equations ◽  
Temperature Dependent ◽  
Gas System ◽  
The Stability ◽  
Loss Mechanisms

A composite interstellar model consisting of stars and optically thin radiating plasma is considered in order to investigate the thermal instability arising from possible radiation and other heat-loss mechanisms. The stellar dynamics is governed by the Vlasov equation, while the gas is supposed to be a hydromagnetic plasma, described by the MHD equations, with a density- and temperature-dependent heat-loss function. It is shown that while with cold stars the system is in general unstable irrespective of thermal effects of the plasma, with warm stars having a Maxwellian distribution the thermal plasma considerably influences the stability of the composite system. It is also shown that the otherwise stable composite (with warm stars) configuration may become unstable in the presence of a radiating plasma because of coupling between the heat-loss mechanisms and stellar populations.

Enactment of the Vet Curricula in the Work Process

2016 ◽  
Vol 27 (1) ◽  
pp. 27-41
Author(s):  
Laimutė Anužienė ◽  
Vidmantas Tūtlys
Keyword(s):  
Personal Development ◽  
Holistic Approach ◽  
Competence Development ◽  
Sociology Of Education ◽  
Work Processes ◽  
Work Process ◽  
Methodological Approaches ◽  
Development Of Students

Abstract The main goal of this article is to explore the contents of the concept of enactment of the VET curriculum in the work process and to disclose the current methodological and methodical approaches of it’s implementation in practice. The article starts with the discussing the theoretical aspects of the enactment of the VET curricula referring to the insights of psychology, sociology of education and work, as well as vocational didactics research. It is followed by the case study of the enactment of VET curriculum in the education and work processes in one initial VET centre of Lithuania aimed to disclose applied methodological approaches and their implications for the professional and personal development of students. Research provides evidence that effective and sustainable enactment of the initial VET curricula requires to apply the integrated and holistic approach to competence development and implementation of VET curriculum.

Heat Transfer-Based Reconstruction of the Concepts and Laws of Classical Thermodynamics

1988 ◽  
Vol 110 (1) ◽  
pp. 243-249 ◽  
Author(s):  
A. Bejan
Keyword(s):  
Heat Transfer ◽  
Point Of View ◽  
Second Law ◽  
Work Processes ◽  
Work Process ◽  
Initial State ◽  
Final State ◽  
Integral Number ◽  
Number Of Cycles ◽  
Classical Thermodynamics

As an alternative to the mechanistic point of view expressed in Carathe´odory’s axioms, it is shown that the laws and concepts of thermodynamics are covered also by two statements made from a purely heat transfer perspective: Axiom I′—The heat transfer is the same in all zero-work processes that take a system from a given initial state to a given final state. Axiom II′—In the immediate neighborhood of every state of a system there are other states that cannot be reached from the first via a zero-work process. The primary concepts of this formulation are heat transfer, temperature, entropy, and zero-work boundary. Axiom I′ is used to define the property “energy,” and to deduce the secondary (derived) concept of “work transfer.” Axiom II′ is used to define the thermodynamic properties of “volume” and “pressure.” In this new heat transfer-based scheme, the analog of the Kelvin–Planck statement of the second law is: “∮δW < 0 is impossible” for an integral number of cycles executed by a closed system while in communication with no more than one pressure reservoir.

scholarly journals Learning on the Job: Understanding the Cooperative Education Work Experience

1993 ◽  
Vol 1 ◽  
pp. 8
Author(s):  
Alison I. Griffith
Keyword(s):  
Work Experience ◽  
Cooperative Education ◽  
Student Experiences ◽  
Common Theme ◽  
Work Processes ◽  
Work Process ◽  
Employment Decisions ◽  
Student Work ◽  
Work Placement ◽  
Learning Programs

Cooperative learning programs in Ontario provide on the job learning experiences for students. This paper analyzes three cases of student work placements described in extensive interviews with students, teachers and co-workers. Some students had enjoyed their work experience while others had not. When the student experiences were situated in the socially organized work processes of the work sites, the diverse experiences were found to have a common theme. When students are able to participate in and make sense of the work process, their work placement experience was seen to be useful for making future employment decisions. Where students were marginal to the work process, their lack of knowledge often translates into an unpleasant work experience and decisions about employment based on an experience of failure. This article suggests that our understanding of student learning on the job would be strengthened by a focus on the socially organized work process.

scholarly journals PENGAPLIKASIAN JOB SAFETY ANALYSIS (JSA) DAN METODE RAPID UPPER LIMB ASSESSMENT (RULA) PADA PEKERJAAN MANUAL HANDLING

2021 ◽  
Vol 4 (2) ◽  
pp. 87-98
Author(s):  
Friska Eka Fitria ◽  
Dina Waldani ◽  
Wenny Murdina Asih
Keyword(s):  
Risk Control ◽  
Extraction Process ◽  
Retrieval Process ◽  
Work Processes ◽  
Work Process ◽  
Car Body ◽  
Descriptive Research ◽  
Job Safety ◽  
Qualitative Descriptive ◽  
Manual Handling

Manual Handling is the process of lifting, moving, placing, pushing, pulling, sliding, and supporting loads with the hands and body. There are 5 work processes at PT. Aura Mandiri Sejahtera still manually which is identified as an ergonomic hazard due to a mismatch between the tool or machine and the posture of the workers. The 5 work processes are the Stone Retrieval Process, the Stone Collection Process, the Stone Lifting Process to the Car Body, the Sand Extraction Process, and the Sand Lifting Process to the Car Body. The purpose of this study was to identify the hazards of manual handling work using JSA and to assess the risks of manual handling work using the RULA method at PT. Aura Mandiri Sejahtera. This type of research is a qualitative descriptive research was conducted from February to August 2021 at PT. Aura Mandiri Sejahtera. The results showed that from 5 manual handling work processes at PT. Aura Mandiri Sejahtera there are 5 ergonomic hazards identified using JSA and when a work risk assessment is carried out using the RULA method, it is found 4 work process with a score of 7 that means efforts must be made to change the work process immediately. for change efforts are expected to the leadership of PT. Aura Mandiri Sejahtera carries out work risk control by modifying work tools in the form of providing or replacing work equipment in accordance with the worker's body posture

Capturing Distributed Contributions to an Informal Work Process

2010 ◽  
pp. 1134-1148
Author(s):  
Cláudio Miguel Sapateiro ◽  
Sérgio Grosso
Keyword(s):  
A Priori ◽  
Work Processes ◽  
Work Process ◽  
Conceptual Approach ◽  
Informal Work ◽  
Loosely Coupled ◽  
Hospital Facility ◽  
Shared Awareness ◽  
Traditional Approaches ◽  
And Control

Beside formalized work processes, organizations also present work processes that aren’t a priori formalized and often rely heavily on tacit knowledge and experience distributed among involved actors. To develop information systems (IS) to assist such work processes is a challenging task. The traditional approaches for modeling often reveal short in emergent and informal work processes which are hardly elicited in requirements phase. In this work we’ve focus in the collaborative dimension of an informal work process to develop a IS aiming to improve the outcome of such process. Teams shared awareness was used as coordination and control mechanism for a loosely coupled collaboration model. The implementation of the proposed conceptual approach in a hospital facility is reported.

Front End Work Process Digital Transformation: Challenges and Opportunities

2021 ◽  
Author(s):  
Grant Veroba ◽  
Nurul Aminah Mohd Azmi
Keyword(s):  
Value Creation ◽  
Rapid Change ◽  
Development Planning ◽  
Digital Transformation ◽  
Work Processes ◽  
Work Process ◽  
Digital Tool ◽  
Front End ◽  
Project Realization ◽  
Pain Points

Abstract Digital transformation is shifting the structure of work in nearly every industry and fundamentally changing the value proposition for customers. As part of PETRONAS’ overall digital transformation, Front End Engineering (FEE) has embarked on an ambitious program to digitalize and integrate the company's Front End project realization processes and applications into a single digital tool, referred to as Concept Factory. This paper reviews the journey to initiate, frame and deliver the Front End work process digitalization. The Concept Factory digital transformation program first focused on a strategy to identify the pain points within the traditional project realization work process and how this is impacting both quality and speed of delivery. Once the pain points were identified, assessment of how digitalization may eliminate the pain points and enhance the project realization process value was completed. This assessment also included an end-to-end review of where the current Front End work processes to identify barriers that challenged the ease of digitalization; these included highly manual and siloed work processes, data management and tools; insufficient leveraging off the extensive Company knowledge databases and analogue projects; and inefficient technical and cost benchmarking to assure robustness of Front End work. This resulted in a more significant Front End process transformation being needed to increase the potential value creation through the digital transformation. A stepwise, iterative approach using Agile project management techniques has been used to harness the full capabilities of digital integration and analytics to FEL-2 rather than merely digitalizing the existing manual workflow. This will be done by first automating and upgrading databases and discrete data hand-offs to be "digital ready", independently developing and digitalizing the full suite of Front End technical and cost analysis tools, then integrating these tools within a common Concept Factory analytics platform for both stand-alone Front End analysis and as a domain tool within the broader Field Development Planning digital framework. Several technical and organizational challenges were identified that need to be overcome from business case syndication to adoption. As the daily work routines of employees are being radically changed to adapt to the rapid change of digital technology, ongoing alignment was done to engage the Front End team and broader stakeholder groups in the process through demonstrations and feedback sessions. In addition, cascading technical needs through the digital team execution required ongoing alignment through daily Scrums, Sprint Planning and demonstration sessions. Fully integrated Front End process digitalization has rarely been attempted within E&P companies. However, this has the potential to disrupt the Front End work process from a manual, siloed generation of deliverables to an automated and integrated techno-commercial process focused on replication, speed and accuracy, a re-focus the Front End team on Value Creation, Assurance and Risk Management initiatives.

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