Revival Time Research Articles

Spin-dependent linear confinement in a magnetic medium

The linear confinement in two-dimensions can yield an analogue of a triangular well or a quantum bouncer. We discuss a way of achieving a linear confinement of a neutral particle with a permanent magnetic dipole moment in a magnetic medium by dealing with a two-dimensional system with cylindrical symmetry. This linear confinement is characterized by being spin-dependent. Then, by including the Aharonov–Casher geometric quantum phase, we show that bound states analogous to those of the quantum bouncer can be achieved, where the energy levels are infinitely degenerated with regard to the ℓ-waves. Further, we obtain the revival time of the system.

Back on Track

This paper addresses the current nostalgia mode, from the most diverse areas of merchandising and cultural production to the very contours of today’s ‘connected’ sociality. Current nostalgia seems to impede creativity and the very idea of a future, which would appear to be unthinkable without being filtered by the the sepia lens of a cosmetic vision of the past. In TV programs, cinema, fashion or advertisement, cars or pop music, our time is the time of quotation, revival, and remake. It is a zombie time in which the future coincides with the generational time one regrets the loss of. It is a cosmetic time of hyperkinetic immobility, in which the future is a retro concept – a time that deprives subjectivity back into a full sense of its contemporaneity.

Effects of Impurities and Deformations on Electronic Effective Mass in Quantum Revival Time within the Infinite Square Well

Effects of Impurities and Deformations on Electronic Effective Mass in Quantum Revival Time within the Infinite Square Well

Социализм преткновения, или Проблемы левого популизма

The first quarter of the 21st century became a time of revival of the idea of socialism. However, the working class is no longer the assumed main subject of the progressive change. The rise of left-wing populism is replacing workers’ movements and corresponding parties. The key feature of such populism is its desire to unite all the oppressed and exploited in the struggle against capitalist “hegemony”. This attitude is reflected, in particular, in the idea of intersectionality, according to which different “systems” of oppression (racism, sexism, homophobia, etc.) and capitalist exploitation are intertwined and can reinforce each other. This idea leads to constant allusions to the general, so to say, “people’s” struggle against capitalism and various forms of oppression. Moreover, some leftist theorists directly insist on the necessity to turn to populism and build strategies for leftist “counterhegemony”. The author thoroughly analyzes modern left-wing populist concepts and reveals serious flaws. The desire for justice and equality often disguises a thirst for privilege and radical hostility towards those who are viewed — often unfairly — as oppressors. Moreover, the struggle for socialism often means emphasizing freedom from labor for some, while ignoring economic hardships of others. The author classifies the contradictions of left-wing populism as insurmountable due to the impossibility of disentangling between the struggle for equality and for the private interests of individual groups. According to his conclusion, under the conditions when zero-sum games are inevitable, for the poor and socially vulnerable strategies for defending their own interests will become increasingly profitable and attractive in contrast to both populist projects and the idea of socialism per se, which increasingly implies the abandonment of these interests without guarantees of any returns in the future.

Remarks on a quantum dot described by scalar exponential potentials

Based on the power-exponential potential model for quantum dots, we study the confinement of a particle to a spherical quantum dot from a long-range potential. We show that analytical solutions to the Schrödinger equation can be achieved for s-waves. We also show that the energy levels of the spherical quantum dot are influenced by the topology of a global monopole. Further, we show that a non-null revival time exists and it can be influenced by the global monopole topology.

S. Bortkiewicz’s piano style

Statement of the problem. The genre-style richness of S. Bortkiewicz’s legacy does not except the dominance of piano music in it, which is explained by the composer’s piano education, the experience of his public performances and teaching activities. The 21st century became a time of revival of the composer’s name in the modern culture, but the specifics of his piano style remain outside the scope of special studies. Recent research and publications shows the great interest in the artist’s figure. Scientists focus on the performance of S. Bortkiewicz himself (Levkulych, 2021), highlight his violin compositions (Yakubov, 2021), develop the theme of dance and dance quality in his music (Kościelak-Nadolska, 2016), examine the composer’s life and creative legacy (Ishioka, 2016), stylistic influences on his thinking (Johnson, 2016). Objectives, methods and novelty of the research. The purpose of the study is to reveal the features of S. Bortkiewicz’s piano style based on observations of leading solo genres (sonatas, preludes, etudes). The scientific novelty of the article is determined by the original thesis about participation in the realization of the artistic idea of a complex of certain pianistic techniques, which are perceived as carriers of emotional content. The presented study is based on the principle of historicism and a comprehensive scientific approach involving various methods of analysis. Research results. In S. Bortkiewicz’s legacy, the piano sonata is represented by two compositions: op. 9, B major, and op. 60, C sharp minor. The purely piano techniques, the totality of which indicates virtuosity as a means of realizing the art design, have the great importance in these works (large-scale technique, bright jumps, rapid octave passages on f, a wide dynamic palette from pp to fff). The combined technique, the use of rubato play become the typical features of his piano style. Preludes op. 13, op. 33, op. 40, and op. 66 are distinguished by the dominance of a single image, embodied by the laconic pianistic means. The image and genre spectrum of prelude cycles is diverse and reflects almost the entire experience of a romantic miniature. The composer finds his own ways to reveal individuality and to manifest the modern thinking, the essence of which is in the use of combinatorial methods in the field of both language means of expression and purely pianistic techniques. The etude genre can be classified as one of the most popular in S. Bortkiewicz’s creativity. Ten Etudes op. 15 and Twelve Etudes-novels op. 29 are a true anthology of the concert etude, which combines the effectiveness of style brilliant and al fresco with spiritual imagery, playing allusions, ironic approach to typical formulas, nostalgia for lost ideals. Conclusion. S. Bortkiewicz demonstrates his own attitude to the classical-romantic tradition, which reveals an individual author position. Relying on typical pianistic techniques, the composer combines a concert virtuoso style with inspired confessional expression, prefers lyrical and scherzo imagery realized often through widely uses polyrhythmic layering, closely connects each of the playing techniques with a certain artistic idea, due to which the author’s own “word” is always felt.

Electric Field Effects on Curved Graphene Quantum Dots.

The recent and continuous research on graphene-based systems has opened their usage to a wide range of applications due to their exotic properties. In this paper, we have studied the effects of an electric field on curved graphene nanoflakes, employing the Density Functional Theory. Both mechanical and electronic analyses of the system have been made through its curvature energy, dipolar moment, and quantum regeneration times, with the intensity and direction of a perpendicular electric field and flake curvature as parameters. A stabilisation of non-planar geometries has been observed, as well as opposite behaviours for both classical and revival times with respect to the direction of the external field. Our results show that it is possible to modify regeneration times using curvature and electric fields at the same time. This fine control in regeneration times could allow for the study of new phenomena on graphene.

Quantum recurrence times in nanostructures

We compute the classical and revival times of electron currents in several bulk nanostructured, semiconductor materials. We have used a nonparabolic Schrödinger equation to model the conduction band of semiconductors. We have calculated the classical and revival periods for quantum dots of Si, Ge and InAs quantum dots. The obtained results are of the order of tenths of nanoseconds to picoseconds, which are within reach of current technologies.

Nonrelativistic quantum effects of the Lorentz symmetry violation on the Morse potential

We search for Lorentz symmetry violation effects at low-energy regime by exploring the Dirac equation in (1 + 1)-dimensions and the possibility of dealing with quantum systems with spherical symmetry. We bring a discussion about the influence of the Lorentz symmetry violation effects on the spectrum of molecular vibrations caused by the coupling between a fixed vector field and the derivative of the fermionic field. Further, we discuss the influence of this Lorentz symmetry violation background on the revival time.

Persistent currents, revival time and effects of rotation on an attractive inverse-square-type potential in a magnetic quadrupole moment system

We study the appearance of an Aharonov–Bohm-type effect around a cylindrical cavity in a magnetic quadrupole moment system in a rotating reference frame. The analogue of the Aharonov–Bohm-type effect of bound states arises from the interaction of the magnetic quadrupole moment of a neutral particle with an induced electric field when the neutral particle is subject to an attractive inverse-square-type potential, which in turn stems from the interaction of the magnetic quadrupole moment of a neutral particle with a magnetic field. We also discuss how the effects of rotation modify the degeneracy of the energy levels in contrast to the case of absence of rotation. Besides this, we calculate the revival time and the persistent currents.

Miniature as Pictorial Interpretation of the Text in the Context of Medievil Culture Development

The purpose of the article is to consider the miniature as a pictorial interpretation of the text, as one of the elements of «entertainment» in the context of the development of medieval culture. The research methodology. An analytical method is used to collect theoretical material about the miniatures of the Mirovingian period (V–VII centuries), on the example of the Sacramentarium Gelasianum and Gellon Sacramentarium; the miniatures from the times of the Carolingian revival of the VIII-IX centuries, («Gospel of Godescalk», «Gospel of Ada», «Gospel from the monastery of St. Medard in Soissons»). A historical and cultural method is applied to analyse the role of the miniature in the socio-cultural life of Medieval Europe as one of the elements of ceremonial and ritual «entertainment». An art historical method that involves a detailed examination and description of a medieval book miniature, and a theoretical method are used to summarise the findings. The scientific novelty of the work is that for the first time the miniatures are considered as a pictorial interpretation of the text in the context of the development of the medieval culture, as a sensual form of knowledge of an ideal model, and one of the elements of the personification of ritualistic "entertainment" in the socio-cultural life of this historical period. Conclusions. The article examines the miniature as a visual interpretation of the text in the context of the development of the culture of the Middle Ages. It has been proven that since ancient times the miniature, on the example of the "Ambrosian Iliad", was the personification of ceremonial and ritual, and partly artistic "entertainment", which made it possible to outline the miniature as a pictorial component of this phenomenon, as well as a pictorial interpretation of the handwritten text which reflects the most current events of this historical era. The brightest examples of the miniatures in the early Christian tradition of Western Europe, which are presented in the Merovingian manuscripts of the V-VIII centuries, are considered using the example of the Sacramentarium Gelasianum and Gellon Sacramentarium. Graphic miniature decoration becomes not just a pictorial interpretation of the text, but turns into an element of worship. There are many images of birds, fish, animals, and plant ornaments, the emphasis is on red, yellow, and green. Great attention is paid to the decorative design of the capital letters of the sections, they become special symbolic signs that are even attributed with magical meaning. The miniature begins to act as a sensual form of knowledge of the ideal model, which is available to the chosen ones. This tradition continues on the example of Carolingian manuscripts, the miniatures «Source of Life» («Gospel of Godescalcus»), «Adoration of the Lamb» and «Source of Life» («Gospel from the Monastery of St. Medard in Soissons») are symbolic, personifying the theocentric worldview, that the Gospel is the source of eternal life.
 Key words: miniature, culture of the Middle Ages, «entertainment», «Ambrosian Iliad», Carolingian manuscripts, Merovingian manuscripts, ornament.

Comparison of the Core-collapse Evolution of Two Nearly Equal-mass Progenitors

We compare the core-collapse evolution of a pair of 15.8 M ☉ stars with significantly different internal structures, a consequence of the bimodal variability exhibited by massive stars during their late evolutionary stages. The 15.78 and 15.79 M ☉ progenitors have core masses (masses interior to an entropy of 4 k B baryon−1) of 1.47 and 1.78 M ☉ and compactness parameters ξ 1.75 of 0.302 and 0.604, respectively. The core-collapse simulations are carried out in 2D to nearly 3 s postbounce and show substantial differences in the times of shock revival and explosion energies. The 15.78 M ☉ model begins exploding promptly at 120 ms postbounce when a strong density decrement at the Si–Si/O shell interface, not present in the 15.79 M ☉ progenitor, encounters the stalled shock. The 15.79 M ☉ model takes 100 ms longer to explode but ultimately produces a more powerful explosion. Both the larger mass accretion rate and the more massive core of the 15.79 M ☉ model during the first 0.8 s postbounce time result in larger ν e / luminosities and RMS energies along with a flatter and higher-density heating region. The more-energetic explosion of the 15.79 M ☉ model resulted in the ejection of twice as much 56Ni. Most of the ejecta in both models are moderately proton rich, though counterintuitively the highest electron fraction (Y e = 0.61) ejecta in either model are in the less-energetic 15.78 M ☉ model, while the lowest electron fraction (Y e = 0.45) ejecta in either model are in the 15.79 M ☉ model.

Bouncing wave packets, Ehrenfest theorem, and uncertainty relation based upon a new concept for the momentum of a particle in a box

For a particle in a box, the operator −i∂x is not self-adjoint and thus does not qualify as the physical momentum. As a result, in general the Ehrenfest theorem is violated. Based upon a recently developed new concept for a self-adjoint momentum operator, we reconsider the theorem and find that it is now indeed satisfied for all physically admissible boundary conditions. We illustrate these results for bouncing wave packets which first spread, then shrink, and return to their original form after a certain revival time. We derive a very simple form of the general Heisenberg–Robertson–Schrödinger uncertainty relation and show that our construction also provides a physical interpretation for it.

Point Charge Subject to an Attractive Inverse-Square-Type Potential and Anharmonic-Type Potentials

By applying the WKB (Wentzel, Kramers, Brillouin) approximation, we search for bound state solutions to the time-independent Schrödinger equation for an attractive inverse-square potential and anharmonic oscillators that stem from the interaction of a point charge with radial electric fields. We focus on the bound states associated with the s-waves. Further, we obtain the revival time associated with each case studied.

“Oh that you would rend the heavens and come down”: An essay on some aspects of the history of revival

This article focuses upon the theme of revival in the history of the church. It highlights first the deep interest of Calvin and Edwards in the doctrine of the Holy Spirit and how their influence was deeply felt among the Puritans. Three examples of revival are given, namely, in France; in the seventeenth century; the English and Scottish Puritans, Calvin’s spiritual children, also experienced revival first-hand; the Elim Evangelistic Band, which developed into the Elim Pentecostal Churches, begun in Ulster in 1915 and soon spread to other parts of the British Isles. In the 1920s it experienced a massive period of revival growth under the leadership of George Jeffreys (1889–1962). Here we learn of the variety as to how God sends revival, using different instruments. The article discusses the following facts about revival and gives examples. Genuine revival is not something that can be created. Revival comes from God. In times of revival, the Spirit primarily uses the Word of God to powerfully impact people. In revival the Holy Spirit’s activity is an exalting of the Saviour–a Christ- centred event.

Collapse and revival structure of information backflow for a central spin coupled to a finite spin bath

The Markovianity of quantum dynamics is an important property of open quantum systems determined by various ingredients of the system and bath. Apart from the system-bath interaction, the initial state of the bath, etc., the dimension of the bath plays a critical role in determining the Markovianity of quantum dynamics, as a strict decay of the bath correlations requires an infinite dimension for the bath. In this work, we investigate the role of finite bath dimension in the Markovianity of quantum dynamics by considering a simple but nontrivial model in which a central spin is isotropically coupled to a finite number of bath spins, and show how the dynamics of the central spin transits from non-Markovian to Markovian as the number of the bath spins increases. The non-Markovianity is characterized by the information backflow from the bath to the system in terms of the trace distance of the system states. We derive the time evolution of the trace distance analytically, and find periodic collapse-revival patterns in the information flow. The mechanism underlying this phenomenon is investigated in detail, and it shows that the period of the collapse-revival pattern is determined by the competition between the number of the bath spins, the system-bath coupling strength, and the frequency detuning. When the number of bath spins is sufficiently large, the period of the collapse-revival structure as well as the respective collapse and revival times increase in proportion to the number of the bath spins, which characterizes how the information backflow decays with a large dimension of the bath. We also analyze the effect of the system-bath interaction strength and frequency detuning on the collapse-revival patterns of the information flow, and obtain the condition for the existence of the collapse-revival structure. The results are illustrated by numerical computation.

Utility of transversus abdominis plane block on patients undergoing transanal total mesorectal excision.

To evaluate the analgesic effect of transversus abdominis plane block (TAPB) on patients undergoing transanal total mesorectal excision (taTME). Medical records of patients who were eligible to receive proctectomy surgery in Renji Hospital, Shanghai Jiao Tong University School of Medicine (From January 2019 to December 2021) were retrospectively reviewed. Propensity score matching (PSM) was applied to the included cases. A total of 120 cases were divided into three groups based on the different operation and anesthesia methods used. Group-A (Lap, n=40) included patients that underwent laparoscopic surgery under general anesthesia. Group- B (ta, n=40) included patients who received taTME surgery under general anesthesia. Group-C (ta+TAPB, n=40) included patients who received taTME surgery under general anesthesia combined with TAPB. The dosage of sufentanil, time of postoperative revival and extubation, anal exhaust time and other adverse events were recorded. Pain assessment using the visual analogue scale (VAS) was performed at 12, 24,48 and 72 hours after the operation. There were no significant differences in the general parameters, operative conditions, and anesthetic administration between the three groups (P>0.05). The dosage of sufentanil was significantly reduced in Group-C, compared with Group-A and Group-B, with no difference between the groups A and B. There was no significant difference between the three groups in postoperative recovery time and extubation time. VAS score was lower in Group-C than Group-A and Group-B. This difference was more obvious in the early postoperative period and gradually diminished with time. VAS score became similar in all three groups 72 hours after the surgery. Transanal total mesorectal excision was associated with less pain, compared to laparoscopic TME. TAPB with general anesthesia in patients undergoing taTME is safe and effective. It can significantly reduce the use of sufentanil and has optimal analgesic effect.

Teori Kontrak Sosial (Studi Komparasi Teori Politik Menurut Imam Al-Mawardi, Thomas Hobbes Dan John Lock)

Scientists have agreed to mark the times of revival in Islamic civilization, namely in the Middle Ages or the Classical century, while this revival in Islamic civilization can be seen, one of which is the development of science ranging from the fields of economics, politics, and in the field of medicine. In the field of Islamic politics, for example, it has received special attention from a philosopher as well as a scholar, namely Imam al-Mawardi, in the field of Islamic politics, the contribution of Imam al-Mawardi can be seen in his book, al-Ahkam al-Sulthaniyah. While broadly speaking, this study aims to further read Imam al-Mawardi's theory of social contract by comparing it with several Western philosophers who also have social contract theory such as Thommas Hobbes, thus this research can also be called a comparative study of the thoughts of figures and theories. used in this study also uses political theories of social contract from several

Gaussian Curvature Effects on Graphene Quantum Dots

In the last few years, much attention has been paid to the exotic properties that graphene nanostructures exhibit, especially those emerging upon deforming the material. Here we present a study of the mechanical and electronic properties of bent hexagonal graphene quantum dots employing density functional theory. We explore three different kinds of surfaces with Gaussian curvature exhibiting different shapes-spherical, cylindrical, and one-sheet hyperboloid-used to bend the material, and several boundary conditions regarding what atoms are forced to lay on the chosen surface. In each case, we study the curvature energy and two quantum regeneration times (classic and revival) for different values of the curvature radius. A strong correlation between Gaussian curvature and these regeneration times is found, and a special divergence is observed for the revival time for the hyperboloid case, probably related to the pseudo-magnetic field generated by this curvature being capable of causing a phase transition.

The Memory of Colonialism in Britain and France: The Sins of Silence. By Itay Lotem

Since the mid-1990s, an ever-growing number of publications have now made it commonplace to identify France as an example of a poorly managed colonial hangover. By contrast, whilst many signs tended to indicate that there was possibly also in Britain a ‘passé qui ne passe pas’, discussions of the imperial past and colonial memory were never framed as a meaningful tool for making sense of what was happening, despite all the racial, historical, and socio-political ramifications of the situation. It is therefore highly satisfying to see a book implicitly (at least in terms of its structure and chronological articulation) using the French trajectory to examine what has remained for a long time an unspoken aspect of British cultural and political life: the memory of the Empire, and how it emerged gradually as a meaningful discussion. Such an intervention is deeply needed at a time when British politicians can often exploit the benefits of uncritical engagement with the Empire, as exemplified by Boris Johnson arguing in 2014 that ‘The UK has bonds of history, language, law, family and customs across the world and we would be foolish not to make more of these at this time of profound global economic revival’ (Foreword to Tim Hewish, How to Solve a Problem like a Visa: The Unhappy State of Commonwealth Migration in the UK (Commonwealth Exchange)). How does this compare with the French context, where Itay Lotem rightly notes that both devoir de mémoire (Chapter 3) and the use of ‘memory as Republican critique’ (Chapter 4) have prevailed, opening spaces for debates which have been unheard of in the UK, notably under the convenient cover of a ‘convivial multiculturalism’ (Chapter 7)? Lotem’s book offers a fascinating overview of the profoundly different trajectories followed by the countries that built and ran the two largest colonial empires of the contemporary period when it came to engaging with, and reflecting upon, the cultural, political, and socio-cultural legacies of their attempt to create what they often called ‘Greater Britain’ or ‘la plus grande France’. At the heart of the book is the fundamental difference between what ‘silence’ means on each side of the English Channel. This is a matter of tradition as much as political circumstances, and is associated with the socio-cultural perception of what the imperial experience achieved, itself linked to how decolonization is remembered. Lotem articulates convincingly how each country has placed a different emphasis on the weight and significance of their colonial past, with memory appearing much more closely associated to political affiliation in the French case, as opposed to Britain where empire was first de-prioritized (Chapter 6), before the ‘tale of the imperial balance sheet’ (Chapter 10) took precedence. The book encompasses a wide range of sources to engage with this Protean, and exceptionally complex, question: interviews and engagement with media sources are a useful complement to the wide range of secondary material that appears in the bibliography. The careful charting of the processes through which empire came back to the fore in public discourse — and under different terms — represents a major contribution to our understanding of how French and British societies have grappled with their imperial past, now that they can no longer rely on their colonies to claim great power status.