Optical amplification in a multichannel FSK coherent system

1988 ◽  
Vol 24 (18) ◽  
pp. 1157 ◽  
Author(s):  
B. Glance ◽  
G. Eisenstein ◽  
P.J. Fitzgerald ◽  
K.J. Pollock ◽  
G. Raybon
Keyword(s):  
Coherent System ◽  
Optical Amplification

Systematic effects in observed parallaxes

1978 ◽  
Vol 48 ◽  
pp. 31-35
Author(s):  
R. B. Hanson
Keyword(s):  
Error Estimates ◽  
Zero Point ◽  
Absolute Zero ◽  
Apparent Magnitude ◽  
Coherent System ◽  
Preliminary Results ◽  
General Catalogue ◽  
Systematic Effects ◽  
New Evidence ◽  
Right Ascension

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.

Dealing with COVID-19: lessons learned from the Italian experience

Coronaviruses ◽  
2020 ◽  
Vol 01 ◽  
Author(s):  
Silvana Mirella Aliberti ◽  
Francesco De Caro ◽  
Giovanni Boccia ◽  
Rosario Caruso ◽  
Mario Capunzo
Keyword(s):  
Public Health ◽  
Risk Assessment ◽  
Lessons Learned ◽  
Coherent System ◽  
Effective Response ◽  
Medical Practitioners ◽  
Italian Experience ◽  
Rapid Spread ◽  
Public Health Officials ◽  
Future Plans

: Italy was the first western nation affected by the pandemic and was observed as a pilot case in the management of the new coronavirus epidemic. The outbreak of COVID-19 disease has been very difficult in Italy, on June 25, 2020 there are 239,821 total cases of which 33,592 deaths nationwide. Three lessons emerged from this experience that can serve as a blueprint to improve future plans for the outbreak of viruses. First, early reports on the spread of COVID-19 can help inform public health officials and medical practitioners in effort to combat its progression; second, inadequate risk assessment related to the urgency of the situation and limited reporting to the virus has led the rapid spread of COVID-19; third, an effective response to the virus had to be undertaken with coherent system of actions and simultaneously.

The Influence of the Established Links between University Courses on the Quality of Teaching

2018 ◽  
Vol 8 (2) ◽  
pp. 35-48
Author(s):  
Jiří Rybička ◽  
Petra Čačková
Keyword(s):  
Higher Education ◽  
Empirical Study ◽  
The Other ◽  
Coherent System ◽  
University Courses ◽  
Quality Of Teaching ◽  
Education Courses ◽  
Initial Knowledge

One of the tools to determine the recommended order of the courses to be taught is to set the prerequisites, that is, the conditions that have to be fulfilled before commencing the study of the course. The recommended sequence of courses is to follow logical links between their logical units, as the basic aim is to provide students with a coherent system according to the Comenius' principle of continuity. Declared continuity may, on the other hand, create organizational complications when passing through the study, as failure to complete one course may result in a whole sequence of forced deviations from the recommended curriculum and ultimately in the extension of the study period. This empirical study deals with the quantitative evaluation of the influence of the level of initial knowledge given by the previous study on the overall results in a certain follow-up course. In this evaluation, data were obtained that may slightly change the approach to determining prerequisites for higher education courses.

Different Shades of Seventeenth-Century Probabilism

2017 ◽  
Author(s):  
Stefania Tutino
Keyword(s):  
Seventeenth Century ◽  
Thematic Analysis ◽  
Moral Theology ◽  
Economic Thought ◽  
Coherent System

This chapter provides a thematic analysis of some of the most significant applications of probabilism to a number of epistemological, intellectual, political, and theological questions. It focuses on four early seventeenth-century authors, each using probabilism to advance a specific intellectual agenda: Tomás Sánchez and his effort to articulate probability as a trait d’union between conscience and law in the context of his elaboration on the doctrine on marriage; Leonardus Lessius and his attempt to use probabilism to update Catholic doctrine and especially Catholic economic thought; Juan Azor and his endeavor to structure probabilism within a stable and coherent system of knowledge; and Emmanuel Sa and his vulgarization of probabilism for the sake of confessors and other readers who did not necessarily have a deep background in, and extensive knowledge of, moral theology.

Brexit and the English Question

2017 ◽  
Author(s):  
Stephen Tierney
Keyword(s):  
Intergovernmental Relations ◽  
Constitutional Reform ◽  
Coherent System ◽  
Inadequate Response ◽  
Asymmetric System ◽  
Recent Introduction ◽  
The Uk

The chapter examines Brexit and the English question, arguing that Brexit should be understood as a result of the ongoing demotic process in England. As Tierney explains, the UK is an asymmetric system. England alone constitutes population-wise almost four-fifths of the UK. This has influenced devolution: while since the 1990s power has transferred outwards towards the devolved nations, England herself has never received equivalent constitutional autonomy, or recognition, within the UK. Proposals for regional devolution within England, transferring powers to nationwide cities, have also failed. the recent introduction within the House of Common of the principle ‘English Votes for English Laws’—allowing only MPs elected in English constituencies to vote on laws concerning England alone, thus overcoming the well-known West Lothian question—is also an inadequate response to ever-increasing nationalistic views. To address this situation post-Brexit, Tierney concludes that constitutional reform is necessary, entrenching a coherent system of intergovernmental relations.

Er 3+ ‐doped antimony‐silica glass and fiber for broadband optical amplification

2021 ◽  
Author(s):  
Weida Zhang ◽  
Liting Lin ◽  
Bijiao Lan ◽  
Jiantao Liu ◽  
Yun Chen ◽  
...  
Keyword(s):  
Silica Glass ◽  
Optical Amplification

scholarly journals The number of failed components in a coherent working system when the lifetimes are discretely distributed

Metrika ◽  
2021 ◽  
Author(s):  
Krzysztof Jasiński
Keyword(s):  
Random Variables ◽  
Continuous Case ◽  
Coherent System ◽  
Coherent Systems ◽  
Discrete Random Variables ◽  
Independent And Identically Distributed

AbstractIn this paper, we study the number of failed components of a coherent system. We consider the case when the component lifetimes are discrete random variables that may be dependent and non-identically distributed. Firstly, we compute the probability that there are exactly i, $$i=0,\ldots ,n-k,$$ i = 0 , … , n - k , failures in a k-out-of-n system under the condition that it is operating at time t. Next, we extend this result to other coherent systems. In addition, we show that, in the most popular model of independent and identically distributed component lifetimes, the obtained probability corresponds to the respective one derived in the continuous case and existing in the literature.

scholarly journals Thematic Reclassifications and Emerging Sciences

2021 ◽  
Author(s):  
Raphaël Sandoz
Keyword(s):  
Classification Systems ◽  
Coherent System ◽  
Historical Evolution ◽  
Thematic Structure ◽  
Over Time

AbstractOver time, various thematic classifications have been put forward to organize science into a coherent system of specialized areas of research. From an analysis of the historical evolution of the criteria used to distinguish the sciences from one another, I propose in this paper a quadripartite typology for the different thematic classification systems propounded by scholars throughout the centuries. Basically, I argue that the criteria used to differentiate the sciences have been alternately drawn from their respective subject matters, kinds of knowledge, methods and aims. Then, I show that several reclassifications occurred in the thematic structure of science. Finally, I argue that such changes in the structure of learning displaced the modalities of contact between the objects, knowledge, methods and aims of the various branches of science, with the result of outlining reshaped intellectual territories conducive to the emergence of new areas of research.

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