scholarly journals BOUNCE OF GRAVITONS EMITTED FROM THE BRANE TO THE BULK BACK TO THE BRANE

2013 ◽  
Vol 28 (25) ◽  
pp. 1350126 ◽  
Author(s):  
MIKHAIL Z. IOFA

Solutions of geodesic equations describing propagation of gravitons in the bulk are studied in a cosmological model with one extra dimension. Brane with matter is embedded in the bulk. It is shown that in the period of early cosmology gravitons emitted from the brane to the bulk under certain conditions can return back to the brane. The model is discussed in two alternative approaches: (i) brane with static metric moving in the AdS space, and (ii) brane located at a fixed position in extra dimension with nonstatic metric. Transformation of coordinates from the one picture to another is performed. In both approaches, conditions for gravitons emitted to the bulk to come back to the brane are found.

2019 ◽  
Vol 32 (4) ◽  
pp. 449-471
Author(s):  
Ulrike Jacob ◽  
Oliver A. Brust

ArgumentRecurring economic crises, like the one of 2007-2008, led to criticism of economic research and a demand to develop new strategies to avoid them. Standard economic theories use conventional approaches to deal with economic challenges, heterodox theories try to develop alternatives with which to face them. It remains unclear whether the 2007-2008 crisis led to a change in economic research as well as to a consideration of alternative approaches. We used co-word analysis to map the structure of economic research in Germany between 2005 and 2014. Core topics within economic research, such as “market” or “production” hardly shift and can be linked to standard economic theories. Peripheral topics such as “inequality” or “unemployment” show greater dynamics. However, only a few of these topics can be linked to heterodox approaches. Certain changes have occurred in reaction to the 2007-2008 crisis. However, the unchanged importance of standard economic topics raises the question whether these changes are sufficient to face coming economic challenges.


2014 ◽  
Vol 44 (3) ◽  
pp. 495-499 ◽  
Author(s):  
Eric Dal Moro ◽  
Joseph Lo

AbstractIn the industry, generally, reserving actuaries use a mix of reserving methods to derive their best estimates. On the basis of the best estimate, Solvency 2 requires the use of a one-year volatility of the reserves. When internal models are used, such one-year volatility has to be provided by the reserving actuaries. Due to the lack of closed-form formulas for the one-year volatility of Bornhuetter-Ferguson, Cape-Cod and Benktander-Hovinen, reserving actuaries have limited possibilities to estimate such volatility apart from scaling from tractable models, which are based on other reserving methods. However, such scaling is technically difficult to justify cleanly and awkward to interact with. The challenge described in this editorial is therefore to come up with similar models like those of Mack or Merz-Wüthrich for the chain ladder, but applicable to Bornhuetter-Ferguson, mix Chain-Ladder and Bornhuetter-Ferguson, potentially Cape-Cod and Benktander-Hovinen — and their mixtures.


1984 ◽  
Vol 98 (2) ◽  
pp. 98-109 ◽  
Author(s):  
J. Bruyn

AbstractFrom 1911 to 1961 Félix Chrétien, secretary to François de Dinteville II, Bishop of Auxerre in Burgundy, and from 1542 onwards a canon in that town, was thought to be the author of three remarkable paintings. Two of these were mentioned by an 18th-century local historian as passing for his work: a tripych dated 1535 on the central panel with scenes from the legend of St. Eugenia, which is now in the parish church at Varzy (Figs. 1-3, cf. Note 10), and a panel dated 1550 with the Martyrdom of St. Stephen in the ambulatory of Auxerre Cathedral. To these was added a third work, a panel dated 1537 with Moses and Aaron before Pharaoh, which is now in New York (Figs. 4-5, cf. Notes I and 3). All three works contain a portrait of François de Dinteville, who is accompanied in the Varzy triptych and the New York panel (where he figures as Aaron) by other portrait figures. In the last-named picture these include his brothers) one of whom , Jean de Dinteville, is well-known as the man who commissioned Holbein's Ambassadors in 1533. Both the Holbein and Moses and Aaron remained in the family's possession until 1787. In order to account for the striking affinity between the style of this artist and that of Netherlandish Renaissance painters, Jan van Scorel in particular, Anthony Blunt posited a common debt to Italy, assuming that the painter accompanied François de Dinteville on a mission to Rome in 1531-3 (Note 4). Charles Sterling) on the other hand, thought of Netherlandish influence on him (Note 5). In 1961 Jacques Thuillier not only stressed the Northern features in the artist's style, especially in his portraits and landscape, but also deciphered Dutch words in the text on a tablet depicted in the Varzy triptych (Fig. I) . He concluded that the artist was a Northerner himself and could not possibly have been identical with Félix Chrétien (Note 7). Thuillier's conclusion is borne out by the occurrence of two coats of arms on the church depicted in the Varzy triptych (Fig. 2), one of which is that of a Guild of St. Luke, the other that of the town of Haarlem. The artist obviously wanted it to be known that he was a master in the Haarlem guild. Unfortunately, the Haarlem guild archives provide no definite clue as to his identity. He may conceivably have been Bartholomeus Pons, a painter from Haarlem, who appears to have visited Rome and departed again before 22 June 15 18, when the Cardinal of S. Maria in Aracoeli addressed a letter of indulgence to him (without calling him a master) care of a master at 'Tornis'-possibly Tournus in Burgundy (Note 11). The name of Bartholomeus Pons is further to be found in a list of masters in the Haarlem guild (which starts in 1502, but gives no further dates, Note 12), while one Bartholomeus received a commission for painting two altarpiece wings and a predella for Egmond Abbey in 1523 - 4 (Note 13). An identification of the so-called Félix Chrétien with Batholomeus Pons must remain hypothetical, though there are a number of correspondences between the reconstructed career of the one and the fragmentary biography of the other. The painter's work seems to betray an early training in a somewhat old-fashioned Haarlem workshop, presumably around 1510. He appears to have known Raphael's work in its classical phase of about 1515 - 6 and to have been influenced mainly by the style of the cartoons for the Sistine tapestries (although later he obviously also knew the Master of the Die's engravings of the story of Psyche of about 1532, cf .Note 8). His stylistic development would seem to parallel that of Jan van Scorel, who was mainly influenced by the slightly later Raphael of the Loggie. This may explain the absence of any direct borrowings from Scorel' work. It would also mean that a more or less Renaissance style of painting was already being practised in Haarlem before Scorel's arrival there in 1527. Thuillier added to the artist's oeuvre a panel dated 1537 in Frankfurt- with the intriguing scene of wine barrels being lowered into a cellar - which seems almost too sophisticated to be attributed to the same hand as the works in Varzy and New York, although it does appear to come from the same workshop (Fig. 6, Note 21). A portrait of a man, now in the Louvre, was identified in 197 1 as a fragment of a work by the so-called Félix Chrétien himself (Fig. 8, Note 22). The Martyrdom of St. Stephen of 1550 was rejected by Thuillier because of its barren composition and coarse execution. Yet it seems to have too much in common with the other works to be totally separated, from them and may be taken as evidence that the workshop was still active at Auxerre in 1550.


2006 ◽  
Vol 39 (4) ◽  
pp. 1-27 ◽  
Author(s):  
Richard Johnstone

Most of the annual reviews which I have prepared for the present journal discuss roughly 100 articles published each previous year in top international research outlets. Even with such a high number per year, considerable selectivity has to be applied – the number of abstracts appearing up to the end of the October 2005 edition of Language Teaching, for example, amounts to 601, mostly published in 2005 and with still more to come for that year. The task of covering 2004 as well as 2005 within the one review, necessitated by personal circumstances, is therefore doubly daunting in its selectivity. For comprehensive coverage then, there is nothing in my view which can compete with the abstracts themselves as published in the present journal.


PMLA ◽  
1937 ◽  
Vol 52 (4) ◽  
pp. 1183-1190
Author(s):  
George W. Whiting

To the student of writing and literature few inquiries are more interesting and valuable than that into an author's practices in revising his own work. To observe the various stages in the evolution of the final version, to note carefully an artist at his work of pruning the dead wood, adding fresh material, smoothing away harsh phrases, selecting just words, and letting light into obscure places—to do this is to come somewhat nearer to an understanding of what in spite of all analysis will remain essentially a mystery. Especially fascinating and instructive is the study of Conrad's revision, for here one sees a supreme artist at work. In his vigorous hewing and rebuilding there is conclusive proof of the artist's untiring industry and consummate skill. Conrad's revision of Nostromo is of particular interest, for this novel occupies a critical place in the evolution of Conrad's prose. Mr. Richard Curie has justly characterized the change that came over Conrad's prose—a change perceptible in the “Amy Foster” of Typhoon and fully marked in from Under Western Eyes onward. This evolution has smoothed away the cadence, has concentrated the manner, has toned down the style of Conrad's former exuberance. At first glance the later and the earlier Conrad appear two totally different men. The unruly splendor of the one has given way to the subtle and elastic suavity of the other … His earlier prose is sometimes uncertain, sometimes exaggerated, but his later prose has the uniform temper of absolute mastery.


PEDIATRICS ◽  
1969 ◽  
Vol 44 (2) ◽  
pp. 300-301
Author(s):  
Richard B. Goldbloom

The continuing "explosion" of scientific information and the arborization of medical specialties have caused physicians to invent names and catch phrases to define their new activities. Regrettably, much of this latter-day vocabulary is unmusical and clumsy. Some examples represent a downright assault on the English Ianguage. It is alarming that a profession whose members demand such precision in their work would tolerate such slapdash semantic shenanigans. One has winced at such utterances as "examination of the chest showed no pathology;" one has cringed when otherwise esteemed colleagues have indulged in such semantic horrors as "coagulogram" and "febrile agglutinins;" but, in years to come the one atrocity whose promulgation may be remembered with particular mal de mer by the older pediatricians will be the term "ambulatory pediatrics."


2020 ◽  
Vol 7 (1(11)) ◽  
pp. 155-166
Author(s):  
Adam Porębski

It is no use looking for the educated musicians who were given a chance to come into longer contact with composition as a school subject being part of their formal education. Meanwhile, fascination with an act of creation and willingness to get familiar with music “from the inside” accompany school-age people. It is then that first, bashful compositional attempts are made. Over time, pupils search for new sounds on their instruments, improvise, experiment, get familiar with music literature. Such attempts should not go unnoticed – an observant pedagogue will easily notice creative predispositions in their pupils. In this article, the author shares his pedagogical experiences gained while giving composition classes at the K. Szymanowski Comprehensive Primary and Secondary Music Schools in Wrocław. The idea of promoting the art of composition was fully implemented in the form of the School Composers’ Club, founded in the school year of 2016/2017, the activity of which is based on the author’s original school curriculum, a system of individualized education and various forms of young composers’ presentations. The Club’s activity assumes, on the one hand, preparing pupils to take up compositional studies and, on the other one, fostering their general musical development enriched with creative competences.


Derrida Today ◽  
2009 ◽  
Vol 2 (2) ◽  
pp. 260-270
Author(s):  
Francesco Vitale

The paper aims to present a reading of the question of Testimony rising in Derrida's later works (from Faith and Knowledge to Poetics and Politics of Witnessing): the experience of Testimony as the irreducible condition of the relation to the Other, of every possible link among living human singularities and, thus, of the thinking of a community to come. This thinking is able to divert the community from the economy grounding and structuring it within our political tradition governed by the metaphysics of presence, which demands the sacrifice of the Other in its multiple theoretical and practical forms. We intend to read this proposal and to point out its rich perspectives by bringing it into the articulation of an ethical-political archi-writing. So we suggest going back to Derrida's early analyses of phenomenology and to De la grammatologie in order to present a reading of archi-writing as the irreducible condition of the relation to otherness and, thus, of the experience through which a living human singularity constitutes itself, a singularity different from the one our tradition compels us to think of within the pattern of the absolute presence to the self, free from the relation to the other.


2019 ◽  
Vol 9 (1) ◽  
pp. 13-17 ◽  
Author(s):  
Kata Csizér ◽  
Csaba Kálmán

Due to the emergence of the self in foreign/second language (L2) motivation theory and research following the introduction of the L2 Motivational Self System (L2MSS) (Dörnyei, 2005, 2009), the past decade has witnessed a surge of attention devoted to the two self dimensions: the Ideal L2 Self, and the Ought-to L2 self of the model (Boo, Dörnyei, & Ryan, 2015). The third core component, however, the L2 Learning Experience has become undeservedly marginalized. We think that such relative neglect has been brought about by two phenomena. On the one hand, the L2 Learning Experience, has so far been underconceptualized, and, as such, its intangible, amorphous nature has undermined its applicability in research on a similar scale that a more elaborate theorization of the other two future self-guides has enabled. On the other hand, by incorporating Markus and Nurius’ (1986) possible selves theory into L2 motivation research, Dörnyei was able to import adaptable and novel concepts to the field, which set the course of the research agenda for years to come.


F1000Research ◽  
2014 ◽  
Vol 3 ◽  
pp. 299
Author(s):  
Ivan Spasojević

To truly understand living systems they must be viewed as a whole. In order to achieve this and to come to some law that living systems comply with, the reductionist approach, which has delivered a tremendous amount of data so far, should be complemented with integrative concepts. The current paper represents my humble attempt towards an integrative concept of homeostasis that would describe the (patho)physiological setup of adult human/mammal system, and that might be applicable in medicine. Homeostasis can be defined as time- and initial-condition-independent globally stabile state of non-equilibrium of a living system in which the interactions of system with the surroundings and internal processes are overall in balance or very near it. The presence of homeostasis or the shift from homeostasis of an adult human/mammal system can be described by equation that takes into account energy and informational input and output, catabolism and anabolism, oxidation and reduction, and entropy, where changes in the input should equal changes in the output within a specific period of time. Catabolism and oxidation are presented on the input side since the drive of the surroundings is to decompose and oxidize living systems, i.e. systems are under constant 'catabolic and oxidative pressure'. According to the equation, homeostasis might be regained by changing any of the input or output components in a proper manner (and within certain limits), not only the one(s) that has/have been changed in the first place resulting in the deviation from homeostasis.


Sign in / Sign up

Export Citation Format

Share Document