scholarly journals Intermittent decoherence blockade in a chiral ring environment

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Salvatore Lorenzo ◽  
Stefano Longhi ◽  
Albert Cabot ◽  
Roberta Zambrini ◽  
Gian Luca Giorgi
Keyword(s):  
Intrinsic Property ◽  
Destructive Interference ◽  
Light Atom ◽  
General Belief ◽  
Dark State ◽  
The Past ◽  
Collective Interaction ◽  
Quantum Feedback ◽  
Chiral Ring ◽  
Dissipative Environment

AbstractIt has long been recognized that emission of radiation from atoms is not an intrinsic property of individual atoms themselves, but it is largely affected by the characteristics of the photonic environment and by the collective interaction among the atoms. A general belief is that preventing full decay and/or decoherence requires the existence of dark states, i.e., dressed light-atom states that do not decay despite the dissipative environment. Here, we show that, contrary to such a common wisdom, decoherence suppression can be intermittently achieved on a limited time scale, without the need for any dark state, when the atom is coupled to a chiral ring environment, leading to a highly non-exponential staircase decay. This effect, that we refer to as intermittent decoherence blockade, arises from periodic destructive interference between light emitted in the present and light emitted in the past, i.e., from delayed coherent quantum feedback.

Introduction

2000 ◽  
Author(s):  
William B. Meyer
Keyword(s):  
New England ◽  
Nathaniel Hawthorne ◽  
Daily Life ◽  
Daily Temperature ◽  
General Belief ◽  
The Past ◽  
Winter Cold ◽  
The Impact

IN THE MID-1830s, the young Nathaniel Hawthorne sat reading "what once were newspapers"—a bound volume of New England gazettes ninety-odd years old. Comparing the daily life that they portrayed with his own, Hawthorne was struck by how different and how much more severe the weather appeared to have been in the past. "The cold was more piercing then, and lingered farther into the spring," he decided; "our fathers bore the brunt of more raging and pitiless elements than we"; "winter rushed upon them with fiercer storms than now—blocking up the narrow forest-paths, and overwhelming the roads. 1 He was not alone in thinking so. Another resident of Salem, Dr. Edward Holyoke, had been of the same opinion. In his later years, the doctor spoke as the classic authority on the weather, the Oldest Inhabitant. Born in 1728, he lived until 1829, the full span of the century that Hawthorne judged mostly at secondhand, and he had kept a daily temperature log for the better part of it. A newspaper in 1824 reported a general belief that the seasons were "more lamb-like" than in earlier times. An English visitor a few years later was frequently told that the climate was moderating. Cold and snowstorms had grown less intense and less frequent: such had been, wrote John Chipman Gray in the 1850s, "and is perhaps still a prevailing impression among the inhabitants of New-England." All the same, that impression of the century gone by was wrong. Gray, who maintained that the winters had not changed, also tried to explain why intelligent observers could have supposed that they had. On one point, he granted, they were correct. Certainly the effects of the weather were not what they had once been. But there was no evidence that a shift in the weather was responsible. Holyoke's own records, analyzed after his death, did not bear out his belief that winter cold and storms had weakened in his lifetime. As Gray pointed out, if the impact of weather on New Englanders had changed, it was because New England society had changed.

scholarly journals Constructing adaptive ecologies: Towards a behavioural model for architecture

2013 ◽  
Vol 5 (2) ◽  
pp. 160-169
Author(s):  
Theodore Spyropoulos
Keyword(s):  
Conceptual Models ◽  
Physical World ◽  
Cultural Challenges ◽  
The Past ◽  
Behavioural Model ◽  
Collective Interaction ◽  
Adaptive Models ◽  
Nuclear Events ◽  
Urban Contexts ◽  
Systemic Form

György Kepes once proclaimed, 'In our new conceptual models of nature, the stable, solid world of substance, which in the past was considered permanent and preordained, is understood as widely dispersed fields of dynamic energies. Matter - the tangible, visible, stable substance in the old image of the physical world - is recast today as an invisible Web of nuclear events with orbiting electrons jumping from orbit to orbit." The fixed and finite tendencies that once served to categorise the natural and the man-made worlds have been rendered obsolete. Today the intersections of information, life and matter display complexities that suggest the possibility of a much deeper synthesis. Within this context, however, architecture is being forced to radically refactor its response to new social and cultural challenges and an accelerated process of urbanisation. Architecture today must participate and engage with the information-rich environments that are shaping our lives by constructing computational frameworks that will allow for change, embracing a demand for adaptive models for living. Our approach to addressing these challenges explores a systemic form of interaction that engages behavioural features that are polyscalar, allowing biodiverse networks to operate between urban contexts, buildings and materials. An intimate correlation of material and computational interaction allows for the emergence of a generative time-based behavioural model of living, where the interplay of local agency and environmental stimulus constructs collective orders. Unlike most manmade structures, the architectures of these structures are not embedded in a blueprint, but rather are correlated operations governed through emerging collective interaction.

Data Mining on ICU Mortality Prediction Using Early Temporal Data: A Survey

2017 ◽  
Vol 16 (01) ◽  
pp. 117-159 ◽  
Author(s):  
Jianfeng Xu ◽  
Yuanjian Zhang ◽  
Peng Zhang ◽  
Azhar Mahmood ◽  
Yu Li ◽  
...  
Keyword(s):  
Data Mining ◽  
Intrinsic Property ◽  
Past Research ◽  
Mortality Prediction ◽  
Future Research ◽  
Temporal Data ◽  
Icu Mortality ◽  
The Past ◽  
Hybrid Framework ◽  
The Subject

Predicting mortality rate for the patients in Intensive Care Unit (ICU) is an active topic in medical domain for decades. The main goal of mortality prediction is to achieve satisfied discrimination and calibration. However, the particular features of the patient records such as high-dimension, irregular, and imbalance nature of ICU data makes prediction challenging. Data mining is gaining an ever-increasing popularity in predicting mortality of ICU patients recently, a comprehensive literature review of the subject has yet to be carried out. This study presented a review of and classification scheme for the past research as well as latest progress and their limitations on application of data mining techniques for predicting ICU mortality. Based on limitations, a hybrid framework combined with intrinsic property of ICU data to improve prediction performance is proposed for future research.

A View of the Past: Action Française Historiography and its Socio-Political Function

1976 ◽  
Vol 19 (1) ◽  
pp. 135-161 ◽  
Author(s):  
Stephen Wilson
Keyword(s):  
Third Republic ◽  
Popular Education ◽  
Right Wing ◽  
General Belief ◽  
Political Issues ◽  
The Past ◽  
Political Function ◽  
History Books ◽  
The Church ◽  
Do So

There seems to have existed in France, at least after 1830, a general belief in the enormous social and political potenntial of education. Socialists, even after the penetration of vulgar Marxism, regarded ignorance as the great obstacle to working-class emancipation; democrats of all shades believed that the authentic Republic would emerge when a secular state primary education system became established; while, for conservatives, to entrust popular education to the Church was the only hope of preventing radical social change or collapse. Education became, therefore, one of the central political issues of the Third Republic. Recent work on the history and civics textbooks used in schools has given some indication of the picture of their society and its history which French schoolchildren were presented with, and of the way in which this may have guided their future attitudes and reactions. It is always difficult to assess the influence and importance of such material in the formation of mentalités, but, in order to do so, it must be remembered that the school textbooks were not the only formers of popular attitudes in this sphere. Not only did state school and Catholic textbooks present rival views, albeit mainly to two distinct audiences, but the period from 1900 to 1940 saw a flourishing of popular history books addressed to adults. These were mainly of Right-wing inspiration and were directed against the academic orthodoxy of the Republican University. A central role was played in this enterprise of historiographical vulgarization by the nationalist and royalist Action Francaise movement, whose ideology was often explicitly or implicitly present in it. The aim of this paper is to analyse the view of the past presented by the Action Franchise historians, and to suggest that the function of their historiography was to project a particular conception of what society was and ought to be like.

scholarly journals Can beliefs in justice predict corrupt behavior?

2019 ◽  
Vol 7 (1) ◽  
pp. 246-259 ◽  
Author(s):  
Kotryna Stupnianek ◽  
Vytautas Navickas
Keyword(s):  
Just World ◽  
General Belief ◽  
Strong Belief ◽  
Retrospective Design ◽  
The Past ◽  
Personal Belief ◽  
Rule Breaking ◽  
Corrupt Behavior

The belief in a just world has been found to be related to rule breaking behavior. However, research has yet to determine whether the same relation holds for corrupt behavior. The current study focused on identifying whether the belief in a just world is a factor that predicts bribery behavior. We hypothesized that people with a weaker belief in a just world would be more likely to report that they had given a bribe compared with people with a strong belief in a just world. A retrospective design was used to conduct a study in Lithuania. Belief in a just world was measured with two scales for assessing personal and general beliefs in a just world. We measured bribery behavior by asking participants (N = 316) to report how many times they had given a bribe during the past 5 years. The results showed that a personal belief in a just world predicted bribery behavior, whereas a general belief in a just world did not. We discuss implications for further studies.

In Defense of Circumcision

PEDIATRICS ◽  
1986 ◽  
Vol 77 (2) ◽  
pp. 266-267
Author(s):  
THOMAS E. WISWELL
Keyword(s):  
Urinary Tract ◽  
Informed Consent ◽  
Urinary Tract Infections ◽  
First Year ◽  
Published Data ◽  
General Belief ◽  
Medical Indication ◽  
The Past ◽  
Tract Infections ◽  
First Year Of Life

In Reply.— Do neonatal circumcisions need infant consent? Obviously, no. Because neonates are minors, the burden is on the parents to make the necessary decision based on informed consent. The general belief in the past 10 to 15 years has been that there is no medical indication for routine performance of circumcision in the newborn. However, we recently published data demonstrating a decreased incidence of urinary tract infections during the first year of life in circumcised male infants.1

scholarly journals Broadband 2D Electronic Spectroscopy Reveals a Carotenoid Dark State in Purple Bacteria

Science ◽  
2013 ◽  
Vol 340 (6128) ◽  
pp. 52-56 ◽  
Author(s):  
Evgeny E. Ostroumov ◽  
Rachel M. Mulvaney ◽  
Richard J. Cogdell ◽  
Gregory D. Scholes
Keyword(s):  
Energy Flow ◽  
Light Harvesting ◽  
Purple Bacteria ◽  
Electronic Spectroscopy ◽  
Natural Light ◽  
Dark State ◽  
The Past ◽  
Transfer Processes ◽  
Harvesting Systems ◽  
Underlying Mechanisms

Although the energy transfer processes in natural light-harvesting systems have been intensively studied for the past 60 years, certain details of the underlying mechanisms remain controversial. We performed broadband two-dimensional (2D) electronic spectroscopy measurements on light-harvesting proteins from purple bacteria and isolated carotenoids in order to characterize in more detail the excited-state manifold of carotenoids, which channel energy to bacteriochlorophyll molecules. The data revealed a well-resolved signal consistent with a previously postulated carotenoid dark state, the presence of which was confirmed by global kinetic analysis. The results point to this state’s role in mediating energy flow from carotenoid to bacteriochlorophyll.

Observations of the continuum near the galactic centre

1967 ◽  
Vol 31 ◽  
pp. 405
Author(s):  
F. J. Kerr
Keyword(s):  
Galactic Centre ◽  
The Past ◽  
Centre Region ◽  
The Continuum

A continuum survey of the galactic-centre region has been carried out at Parkes at 20 cm wavelength over the areal11= 355° to 5°,b11= -3° to +3° (Kerr and Sinclair 1966, 1967). This is a larger region than has been covered in such surveys in the past. The observations were done as declination scans.

The Origin of the Moon and its Relationship to the Origin of the Solar System

1962 ◽  
Vol 14 ◽  
pp. 133-148 ◽  
Author(s):  
Harold C. Urey
Keyword(s):  
Solar System ◽  
The Moon ◽  
The Past ◽  
The Earth ◽  
Short Period ◽  
Origin Of The Moon

During the last 10 years, the writer has presented evidence indicating that the Moon was captured by the Earth and that the large collisions with its surface occurred within a surprisingly short period of time. These observations have been a continuous preoccupation during the past years and some explanation that seemed physically possible and reasonably probable has been sought.

On The Possibility of an Autonomous History of Modern Southeast Asia

1961 ◽  
Vol 2 (2) ◽  
pp. 73-105 ◽  
Author(s):  
John R. W. Small
Keyword(s):  
Southeast Asia ◽  
Contemporary History ◽  
The Past ◽  
History Of

It is generally accepted that history is an element of culture and the historian a member of society, thus, in Croce's aphorism, that the only true history is contemporary history. It follows from this that when there occur great changes in the contemporary scene, there must also be great changes in historiography, that the vision not merely of the present but also of the past must change.

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