2Chapter In Harmony with the Environment: Nature’s Energy Flows and Desired Materials Properties

ABSTRACTOur experiences in research on nanoscience and technology using various microscopies to observe materials synthesis reactions and to measure local (∼ 0.1-100 nm scale) structure and composition variations in solids provide some very useful examples to introduce students to important concepts of the field. The fundamental concept to illustrate is the nanometer length scale, of course, but other concepts such as mass and energy flows at the nanometer level and their effects on materials properties are at least as important, but more difficult to bring to students in a challenging but understandable way. We are using dynamic in situ or animated microscopy experiments in several material systems to teach these concepts. These experimental research results provide a useful basis for student computer modeling experiments, to give them direct participation in nanoscale materials research at an appropriate level. We are also exploring student group participation in live (interactive) electron microscopy experience via remote access into a suitably equipped computer visualization classroom.

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Applications of Transmission Electron Microscopy in the Characterization of Metal Machinability

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100101967 ◽

1968 ◽

Vol 26 ◽

pp. 442-443 ◽

Cited By ~ 1

Author(s):

L.E. Murr ◽

A.B. Draper

Keyword(s):

Electron Microscopy ◽

State Physics ◽

Test Material ◽

Milling Machine ◽

Rotary Table ◽

Solid State Physics ◽

Materials Properties ◽

Transmission Electron ◽

Selection Of

The industrial characterization of the machinability of metals and alloys has always been a very arbitrarily defined property, subject to the selection of various reference or test materials; and the adoption of rather naive and misleading interpretations and standards. However, it seems reasonable to assume that with the present state of knowledge of materials properties, and the current theories of solid state physics, more basic guidelines for machinability characterization might be established on the basis of the residual machined microstructures. This approach was originally pursued by Draper; and our presentation here will simply reflect an exposition and extension of this research.The technique consists initially in the production of machined chips of a desired test material on a horizontal milling machine with the workpiece (specimen) mounted on a rotary table vice. A single cut of a specified depth is taken from the workpiece (0.25 in. wide) each at a new tool location.

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Bubbles, Eruptions, Stagnation and Floods: How Energy Flows in Small Groups

PsycEXTRA Dataset ◽

10.1037/e538282010-001 ◽

2003 ◽

Author(s):

H. Arrow

Keyword(s):

Small Groups ◽

Energy Flows

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Energy Management of Electromechanical Systems on the Board of a Ship

International conference KNOWLEDGE-BASED ORGANIZATION ◽

10.2478/kbo-2020-0108 ◽

2020 ◽

Vol 26 (3) ◽

pp. 14-19

Author(s):

Laurențiu Bogdan Asalomia ◽

Gheorghe Samoilescu

Keyword(s):

Energy Management ◽

Management System ◽

Integrated Management ◽

Integrated Management System ◽

Management Actions ◽

Energy Flows ◽

Reduce Emissions ◽

Technical Solutions ◽

Productive Time

AbstractThe paper analyzes, starting from the Integrated Management System, the role of automation, the role of the officer and the role of the Energy Management System on board the ship. The implementation of an EnMS establishes the structure and discipline of identifying energy flows, implementing management actions and, finally, applying technical solutions, which significantly reduce energy costs, reduce non-productive time in production, and reduce emissions. of Greenhouse Gases in the environment. The steps to be highlighted in the realization of energy management are analyzed.

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Re-Programming Hydrogel Properties using a Fuel-driven Reaction Cycle

10.26434/chemrxiv.9985334.v2 ◽

2019 ◽

Author(s):

Nishant Singh ◽

Bruno Lainer ◽

Georges Formon ◽

Serena De Piccoli ◽

Thomas Hermans

Keyword(s):

Methionine Oxidation ◽

Guanosine Triphosphate ◽

Control Reaction ◽

Reaction Cycle ◽

Materials Properties ◽

Assembly Kinetics ◽

Control Assembly ◽

Indispensable Tool ◽

Reaction Cycles ◽

Non Equilibrium

Nature uses catalysis as an indispensable tool to control assembly and reaction cycles in vital non-equilibrium supramolecular processes. For instance, enzymatic methionine oxidation regulates actin (dis)assembly, and catalytic guanosine triphosphate hydrolysis is found in tubulin (dis)assembly. Here we present a completely artificial reaction cycle which is driven by a chemical fuel that is catalytically obtained from a ‘pre-fuel’. The reaction cycle controls the disassembly and re-assembly of a hydrogel, where the rate of pre-fuel turnover dictates the morphology as well as the mechanical properties. By adding additional fresh aliquots of fuel and removing waste, the hydrogels can be re-programmed time after time. Overall, we show how catalysis can control fuel generation to control reaction / assembly kinetics and materials properties in life-like non-equilibrium systems.

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