Dynamics of Plasmonic Stopped-Light Nanolasing and Condensation

MRS Advances ◽  
2016 ◽  
Vol 1 (23) ◽  
pp. 1671-1676 ◽  
Author(s):  
A. Freddie Page ◽  
Tim W. Pickering ◽  
Joachim M. Hamm ◽  
Sebastian M. Wuestner ◽  
Ortwin Hess
Keyword(s):  
Resonant Cavity ◽  
Gain Control ◽  
Diffraction Limit ◽  
Electromagnetic Energy ◽  
The Other ◽  
One Dimension ◽  
Spatial Frequencies ◽  
New Type ◽  
Zero Group ◽  
Dielectric Structures

ABSTRACTBy reducing the number of dimensions that light can propagate in from three down to two, one may gain control over the characteristics of propagation. This control can allow for “Stopped Light” (SL), where wavepackets of light are slowed down to a zero group velocity. This is achieved by designing planar metal-dielectric structures that are stacked in one dimension allowing for waveguide modes in the other two, and engineering the dispersion relation of these structures. Stopped light structures can be further optimized to reduce their dispersion and increase the number of spatial frequencies supported, which allows for confinement of electromagnetic energy over volumes smaller than the diffraction limit over fixed regions in space. If this electromagnetic energy is confined over a region that provides gain, the question arises, can amplification of this light energy occur? and indeed can a regime of lasing be entered into? We show that stopped light lasing is indeed possible, despite there being no resonant cavity in 2d to confine the light, and explore the properties of this new type of laser.

Galilean Relativity

2018 ◽  
Author(s):  
David M. Wittman
Keyword(s):  
Inertial Frame ◽  
Vertical Component ◽  
Horizontal Component ◽  
The Other ◽  
One Dimension ◽  
Everyday Experience ◽  
Low Speed ◽  
Principle Of Relativity ◽  
Galilean Relativity ◽  
Laws Of Motion

Galilean relativity is a useful description of nature at low speed. Galileo found that the vertical component of a projectile’s velocity evolves independently of its horizontal component. In a frame that moves horizontally along with the projectile, for example, the projectile appears to go straight up and down exactly as if it had been launched vertically. The laws of motion in one dimension are independent of any motion in the other dimensions. This leads to the idea that the laws of motion (and all other laws of physics) are equally valid in any inertial frame: the principle of relativity. This principle implies that no inertial frame can be considered “really stationary” or “really moving.” There is no absolute standard of velocity (contrast this with acceleration where Newton’s first law provides an absolute standard). We discuss some apparent counterexamples in everyday experience, and show how everyday experience can be misleading.

Hydroxyl-containing bis(sulfonates). Reaction of 1,4-dibromo-2,3-butanedione with water, methanol and sodium sulfite

2021 ◽  
pp. 1-12
Author(s):  
Gerasimos M. Tsivgoulis ◽  
Dimitris G. Vachliotis ◽  
Golfo G. Kordopati ◽  
Panayiotis V. Ioannou
Keyword(s):  
13C Nmr ◽  
Sodium Sulfite ◽  
The Other ◽  
Carbonyl Carbon ◽  
1H And 13C Nmr ◽  
Sodium Sulfonate ◽  
Pure Product ◽  
Methylene Groups ◽  
New Type ◽  
High Yields

Sulfonates are well-known substances with a variety of applications, e.g. as surfactants. On the other hand, bis(sulfonates) bearing hydroxyl or keto group(s) in between the sulfonate groups can be used with or without further modification as starting materials for the preparation of new type of molecules capable to form either complexes or in general supramolecular structures. The synthesis of three hydroxyl-bearing bis(sulfonates), 2-hydroxypropane-1,3-bis(sodium sulfonate) 4, DL-2,3-dihydroxybutane-1,4-bis(sodium sulfonate) 8, and sodium 2,3,4-trihydroxy-1-sulfonate 7 (as by-product) via the Strecker sulfonation are described. Interestingly, under similar conditions, sulfonation of 1,4-dibromo-2,3-butanedione 9 was found to be very complicated and no pure product could be isolated, despite previously reported results on sulfonation of α-halogenated ketones in high yields. There are indications that SO3 2 -  attacks at the carbonyl carbon of 9 followed by rearrangement and expulsion of SO4 2 - . 1,4-dibromo-2,3-butanedione 9, bearing two keto groups next to methylene groups, can potentially exist as enols or in the case of its solution in hydroxylic solvents in the form of hemiketals or geminal diols. This behavior of 9 when is dissolved in CDCl3, CD3OD and D2O was studied by means of UV-Vis, 1H and 13C NMR and the nature of the adducts formed was elucidated.

scholarly journals Assessing a Linear Nanosystem's Limiting Reliability from its Components

2008 ◽  
Vol 45 (03) ◽  
pp. 879-887 ◽  
Author(s):  
Nader Ebrahimi
Keyword(s):  
Present State ◽  
Size Range ◽  
Two Dimensions ◽  
The Other ◽  
One Dimension ◽  
Present Moment ◽  
One Dimensional ◽  
The One ◽  
Fixed Moment ◽  
Nanosized Systems

Nanosystems are devices that are in the size range of a billionth of a meter (1 x 10-9) and therefore are built necessarily from individual atoms. The one-dimensional nanosystems or linear nanosystems cover all the nanosized systems which possess one dimension that exceeds the other two dimensions, i.e. extension over one dimension is predominant over the other two dimensions. Here only two of the dimensions have to be on the nanoscale (less than 100 nanometers). In this paper we consider the structural relationship between a linear nanosystem and its atoms acting as components of the nanosystem. Using such information, we then assess the nanosystem's limiting reliability which is, of course, probabilistic in nature. We consider the linear nanosystem at a fixed moment of time, say the present moment, and we assume that the present state of the linear nanosystem depends only on the present states of its atoms.

Regeneration from duplicating fragments of the Drosophila wing disc

Development ◽  
1981 ◽  
Vol 66 (1) ◽  
pp. 117-126
Author(s):  
Jane Karlsson ◽  
R. J. Smith
Keyword(s):  
Imaginal Disc ◽  
General Rule ◽  
Wing Disc ◽  
The Other ◽  
Posterior Compartment ◽  
Drosophila Wing ◽  
Polar Coordinate ◽  
New Type ◽  
Coordinate Model

It is a general rule that of two complementary Drosophila imaginal disc fragments, one regenerates and the other duplicates. This paper reports an investigation of an exception to this rule. Duplicating fragments from the periphery of the wing disc which lacked presumptive notum were found to regenerate notum structures during and after duplication. The propensity for this was greatest in fragments lying close to the presumptive notum, with the exception of a fragment confined to the posterior compartment, which did not regenerate notum. Structures were added sequentially, and regeneration stopped once most of the notum was present. These results are not easily explained by the polar coordinate model, which states that regeneration cannot occur from duplicating fragments. Since compartments appear to be involved in this type of regeneration as in others, it is suggested that a new type of model is required, one which permits simultaneous regeneration and duplication, and assigns a major role to compartments.

Is There a Place for Anthropology in Social Science History?

1999 ◽  
Vol 23 (4) ◽  
pp. 535-559
Author(s):  
Alice Bee Kasakoff
Keyword(s):  
Social Science ◽  
The Other ◽  
One Dimension ◽  
Time And Space ◽  
Science History ◽  
Social Science History ◽  
Secure Place

Imagine a fourfold table in which one dimension is “present versus past” and the other “exotic versus home.” Traditionally, social and cultural anthropology’s domain has been the exotic’s present and history’s domain the home’s past. A third box, the home’s present, has been occupied by sociology, while the fourth, the exotic’s past, has usually been the province of anthropologists too because other disciplines—with the exception, perhaps, of ethnohistorians—are usually even less interested in exotic peoples’ past than in their present. These domains are now in flux. I argue, in what follows, that only when the oversimplified ideas about time and space that have created them are seriously questioned will anthropology find a secure “place” in social science history.

scholarly journals A Method for Fabricating Arrays of Nanopatterns with the Feature Size beyond Diffraction Limit

2008 ◽  
Vol 2008 ◽  
pp. 1-4 ◽  
Author(s):  
Shuhong Li ◽  
Lifang Shi ◽  
Xiaochun Dong ◽  
Chunlei Du ◽  
Yudong Zhang
Keyword(s):  
Time Domain ◽  
Finite Difference Time Domain ◽  
Diffraction Limit ◽  
Evanescent Waves ◽  
The Other ◽  
Optical Intensity ◽  
Polystyrene Spheres ◽  
Feature Size ◽  
Contact Points ◽  
Difference Time

A convenient lithographic technique is proposed in this paper, which can be used to produce subdiffraction-limit arrays of nanopatterns over large areas (about several square centimeters). An array of polystyrene spheres (PS) is arranged on the surface of a layer of silver which has a thickness of about tens of nanometers. With the normal illumination light of wavelength 365 nm perpendicular to the substrate, PS can generate an array of optical patterns with high intensity at their contact points with silver. By designing the silver slab, the evanescent waves that carry subwavelength information about the optical patterns are substantially enhanced, while propagating components are restrained. In the photoresist which is on the other side of silver, the optical intensity is redistributed and subdiffraction-limit patterns are obtained after exposure and development. Simulation by finite-difference time-domain (FDTD) and experiments were carried out to verify the technique. The results show that by using PS with diameter of 600 nm, nanopatterns with dimension of less than 80 nm can be obtained.

scholarly journals A Hooked-Collar for Bridge Piers Protection: Flow Fields and Scour

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1251 ◽  
Author(s):  
Su-Chin Chen ◽  
Samkele Tfwala ◽  
Tsung-Yuan Wu ◽  
Hsun-Chuan Chan ◽  
Hsien-Ter Chou
Keyword(s):  
Laboratory Experiments ◽  
Horseshoe Vortex ◽  
Flow Fields ◽  
Bridge Pier ◽  
The Other ◽  
Bridge Piers ◽  
Vortex Strength ◽  
Numerical Tests ◽  
Scour Hole ◽  
New Type

A new type of collar, the hooked-collar, was studied through experiments and numerical methods. Tests were conducted using a hooked collar of a width of 1.25b and a height of 0.25b, where b is the bridge-pier width. The hooked-collar efficiency was evaluated by testing different hooked-collar placements within the bridge-pier, which were compared to the bridge-pier without any collar. A double hooked-collar configuration, one placed at the bed level and the other buried 0.25b, was the most efficient at reducing the scour hole. In other cases, a hooked-collar positioned 0.25b above the bed slightly reduced the scour hole and had similar scour patterns when compared to the pier without the hooked-collar. The flow fields along the vertical symmetrical plane in the experiments are also presented. Laboratory experiments and numerical tests show that maximal downflow is highly reduced along with a corresponding decrease in horseshoe vortex strength for the experiments with the hooked-collar, compared to cases without the hooked-collar. The flow fields reveal that the maximum turbulent kinetic energy decreases with the installation of the hooked-collar.

scholarly journals Adult’s Participation in Work-related Training: The Balance between Improving Job and a Desire for Learning

2016 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Ana Inés Renta Davids ◽  
Manel Fandos-Garrido ◽  
José Miguel Jiménez-González ◽  
Ángel Pío González-Soto
Keyword(s):  
Factor Analysis ◽  
Quantitative Analysis ◽  
Continuing Education ◽  
Professional Training ◽  
Demographic Variables ◽  
The Other ◽  
One Dimension ◽  
Work Related ◽  
Different Types ◽  
Motivation To Participate

<p>The study draws on findings from a survey of adults in non-formal continuing education under the professional training for employment framework in Spain. Quantitative analysis was carried out to a sample of 425 respondents from three different educational providers. Firstly, a factor analysis was conducted to fourteen motives for participation items. A two-dimension model of motivation to participate was identified: one dimension oriented towards job-improvement and the other dimension oriented towards learning. Secondly, a variance analysis was conducted according to demographics variables. Results showed significant statistical differences in the first dimension according to demographic variables. This might indicates an instrumental motivation in participation in work-related training among different groups who try to cope with different types of drawbacks.</p>

scholarly journals The role of morality in social cognition

2019 ◽  
Author(s):  
Jennifer Lauren Ray ◽  
Peter Mende-Siedlecki ◽  
Ana P. Gantman ◽  
Jay Joseph Van Bavel
Keyword(s):  
Social Cognition ◽  
Social Perception ◽  
Impression Formation ◽  
Factor Models ◽  
The Other ◽  
One Dimension ◽  
Primary Role ◽  
The Past ◽  
Important Basis

Over the past few decades, two-factor models of social cognition have emerged as the dominant framework for understanding impression formation. Despite the differences in the labels, there is wide agreement that one dimension reflects sociability potential, and the other, competence. One way in which the various two-factor models do clearly differ, however, is in the way the dimensions incorporate or produce evaluations of morality. Aristotle saw morality as the most important basis on which to form positive evaluations, because competence and sociability could only be virtuous, sincere, and trustworthy if expressed through a moral character. This chapter highlights research demonstrating the unique and possibly primary role of morality in social cognition. We clarify the dynamic, interactive, and conjoint effects of morality on social perception, and argue morality, competence, and sociability are three influential and interactive dimensions of social perception.

scholarly journals KARAKTERISTIK ORGANIOLEPTIK OTAK-OTAK IKAN YANG DIBERI EDIBLE COATING KARAGINAN DENGAN PENAMBAHAN ASAP CAIR

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Eka Irma Q Bariah ◽  
Siegfried Berhimpon ◽  
Eunike Louisje Mongi
Keyword(s):  
Environmentally Friendly ◽  
Food Product ◽  
Edible Coating ◽  
The Other ◽  
Liquid Smoke ◽  
Organoleptic Characteristics ◽  
Randomized Design ◽  
New Type ◽  
Completely Randomized Design

Edible coating is a new type of packaging made of biopolymer. The advantages of edible coating is enable to protect the food product, the original appearance of the product can be maintained and the product can be eaten as well as environmentally friendly. The study aim was to look at the organoleptic characteristics of fish cake coated with edible coating of carrageenan were given a liquid smoke. The treatments  given were variation of carrageenan concentration i,e. 0%, 1%, 1,5%, 2%, 2,5%, 3%. The experiment was designed using a Completely Randomized Design (CRD). To determine the effect of treatments, the data were tested using organoleptical tests consists of hedonic and texture.The results shown that hedonic test of the appearance and color of the raw sample have significant effect (p>0,05), while the other test showed no significant effect (p>0,05). However, the organoleptical score for taste, smell and texture shown a tendency that the fish cake coated, have  higher score than without coated. Keywords: Edible coating, Carrageenan, Fish cake, Liquid smoke.

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