Nonlinear optical devices: Relative Status of Polymeric Materials

1991 ◽  
Vol 228 ◽  
Author(s):  
George I. Stegeman
Keyword(s):  
Nonlinear Optical ◽  
Organic Materials ◽  
State Of The Art ◽  
Polymeric Materials ◽  
Nonlinear Optical Devices ◽  
Current State ◽  
Device Applications ◽  
Relative Status ◽  
Nonlinear Optical Phenomena ◽  
Made In

ABSTRACTNonlinear optical phenomena have been investigated over the last three decades in many different materials and a great deal of progress has been made in both the basic science and device applications.(1] Although interest in nonlinear organic materials dates back to the early days of nonlinear optics, it is only in the last five years that progress has been sustained and rapid. The purpose of this paper is to examine progress in developing new nonlinear organic materials and in their application to devices for comparison with current state-of-the-art devices using other material systems.

Developments in Rechargeable Mno2Electrodes for Lithium Batteries

1988 ◽  
Vol 135 ◽  
Author(s):  
Michael M Thackeray
Keyword(s):  
Lithium Batteries ◽  
Lithium Battery ◽  
Electrode Materials ◽  
State Of The Art ◽  
Structural Features ◽  
Rechargeable Batteries ◽  
Current State ◽  
Alternative Systems ◽  
Battery Technology ◽  
Made In

AbstractConsiderable efforts are in progress to develop rechargeable batteries as alternative systems to the nickel-cadmium battery. In this regard, several advances have been made in ambient-temperature lithium battery technology, and specifically in the engineering of rechargeable lithium/manganese dioxide cells. This paper reviews the current state of the art in rechargeable Li/MnO2battery technology; particular attention is paid to the structural features of various MnO2electrode materials which influence their electrochemical and cycling behaviour in lithium cells.

Optimal Passive Damper Positioning Techniques

2013 ◽  
pp. 85-111 ◽  
Author(s):  
Arun M. Puthanpurayil ◽  
Rajesh P Dhakal ◽  
Athol J. Carr
Keyword(s):  
Seismic Event ◽  
State Of The Art ◽  
Sensitivity Study ◽  
Optimal Distribution ◽  
Comparative Sensitivity ◽  
Numerical Studies ◽  
Current State ◽  
Passive Damper ◽  
Damping Model ◽  
Made In

A consolidated review of the current-state-of-the-art on optimal damper positioning techniques is presented in this chapter. The inherent assumptions made in previous research are discussed and substantiated with numerical studies. Earlier studies have shown that optimal distribution of dampers is sensitive to in-structure damping. In this chapter the significance of optimal distribution of dampers coupled with the necessity for the use of a more realistic in-structure damping model is qualitatively illustrated using a comparative sensitivity study. The effect of inherent assumption of linearity of the parent frame on the ‘optimality’ is also investigated. It is shown that linearity assumption imposed on the parent frame in a major seismic event may not be justified; thereby raising doubts on the scope of optimality techniques proposed in literature.

scholarly journals Progress in Cooling Nanoelectronic Devices to Ultra-Low Temperatures

2020 ◽  
Vol 201 (5-6) ◽  
pp. 772-802 ◽  
Author(s):  
A. T. Jones ◽  
C. P. Scheller ◽  
J. R. Prance ◽  
Y. B. Kalyoncu ◽  
D. M. Zumbühl ◽  
...  
Keyword(s):  
State Of The Art ◽  
Electronic Devices ◽  
Bulk Materials ◽  
Nanoelectronic Devices ◽  
Current State ◽  
Physical Effects ◽  
On Chip ◽  
Nanoscale Physics ◽  
A Current ◽  
Made In

AbstractHere we review recent progress in cooling micro-/nanoelectronic devices significantly below 10 mK. A number of groups worldwide are working to produce sub-millikelvin on-chip electron temperatures, motivated by the possibility of observing new physical effects and improving the performance of quantum technologies, sensors and metrological standards. The challenge is a longstanding one, with the lowest reported on-chip electron temperature having remained around 4 mK for more than 15 years. This is despite the fact that microkelvin temperatures have been accessible in bulk materials since the mid-twentieth century. In this review, we describe progress made in the last 5 years using new cooling techniques. Developments have been driven by improvements in the understanding of nanoscale physics, material properties and heat flow in electronic devices at ultralow temperatures and have involved collaboration between universities and institutes, physicists and engineers. We hope that this review will serve as a summary of the current state of the art and provide a roadmap for future developments. We focus on techniques that have shown, in experiment, the potential to reach sub-millikelvin electron temperatures. In particular, we focus on on-chip demagnetisation refrigeration. Multiple groups have used this technique to reach temperatures around 1 mK, with a current lowest temperature below 0.5 mK.

scholarly journals Insight and psychosis: the next 30 years

2019 ◽  
Vol 217 (3) ◽  
pp. 521-523 ◽  
Author(s):  
Anthony S. David
Keyword(s):  
Conceptual Development ◽  
State Of The Art ◽  
Involuntary Treatment ◽  
The Past ◽  
Current State ◽  
Decision Making Capacity ◽  
Cognitive Neurosciences ◽  
Clinical Associations ◽  
The Relationship ◽  
Made In

Academic interest in the concept of insight in psychosis has increased markedly over the past 30 years, prompting this selective appraisal of the current state of the art. Considerable progress has been made in terms of measurement and confirming a number of clinical associations. More recently, the relationship between insight and involuntary treatment has been scrutinised more closely alongside the link between decision-making capacity and insight. Advances in the clinical and cognitive neurosciences have influenced conceptual development, particularly the field of ‘metacognition’. New therapies, including those that are psychologically and neurophysiologically based, are being tested as ways to enhance insight.

Synthesis and applications of CdSe nano-tetrapods in hybrid photovoltaic devices

2012 ◽  
Vol 84 (12) ◽  
pp. 2549-2558 ◽  
Author(s):  
Lijuan Zhao ◽  
Linfeng Hu
Keyword(s):  
State Of The Art ◽  
Chloroform Solution ◽  
Photovoltaic Devices ◽  
Direct Band Gap ◽  
Field Emitters ◽  
Current State ◽  
Photovoltaic Applications ◽  
Direct Band ◽  
Remarkable Progress ◽  
Made In

Tetrapod-shaped nanocrystals have attracted increasing interest for optoelectronic applications in recent years due to their rich morphologies. With unique properties such as a direct band-gap and excellent photoelectrical characteristics, CdSe nano-tetrapods are promising nanostructures for applications in such fields as photodetectors, field emitters, and photovoltaic devices. This review mainly describes the remarkable progress made in synthesis and hybrid photovoltaic applications of CdSe nano-tetrapods over the last few years. In particular, the “blinking” effect observed from these nano-tetrapods in chloroform solution is highlighted. This overview covers the current state of the art as well as an outlook on possibilities and limitations.

Doped Polymers as Third-Order Nonlinear-Optical Materials

1990 ◽  
Vol 214 ◽  
Author(s):  
Mark. G. Kuzyk ◽  
U. C. Paek ◽  
Carl W. Dirk ◽  
Mark P. Andrews
Keyword(s):  
Optical Materials ◽  
Nonlinear Optical ◽  
Polymeric Materials ◽  
Optical Nonlinearity ◽  
Third Order ◽  
Optical Device ◽  
Optical Fiber Devices ◽  
The Status ◽  
Device Applications ◽  
Doped Polymers

ABSTRACTRecently, there has been much interest in doped polymeric materials owing to their suitability for optical device applications.[1] While most of this effort has been centered on poled polymers and their applications to electrooptics, doped polymers are beginning to emerge as a promising material class for all-optical device applications. In this contribution, we discuss the status of doped polymers as third-order optical materials. Particular attention is focused on those properties that make doped polymers attractive as device materials such as optical nonlinearity and loss and their suitability for nonlinear-optical fiber devices.

scholarly journals Towards FAIR Data for Low Carbon Energy - Current State and Call for Action

2021 ◽  
Author(s):  
Valeria Jana Schwanitz ◽  
August Wierling ◽  
Mehmet Biresselioglu ◽  
Massimo Celino ◽  
Muhittin Demir ◽  
...  
Keyword(s):  
State Of The Art ◽  
Energy Transition ◽  
Low Carbon ◽  
Energy Current ◽  
Data Practices ◽  
Current State ◽  
Energy Domain ◽  
Scholarly Data ◽  
Low Carbon Energy ◽  
Made In

Abstract With the continued digitization of the energy sector, the problem of sunken scholarly data investments and forgone opportunities of harvesting existing data is exacerbating. It adds to the problem that the reproduction of knowledge is incomplete, impeding the transparency of science-based evidence for the choices made in the energy transition. We comprehensively test FAIR data practices in the energy domain with the help of automated and manual tests. We document the state-of-the art and provide insights on bottlenecks from the human and machine perspectives. We propose action items for overcoming the problem with FAIR and open energy data and suggest how to prioritize activities.

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