cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Signifying on Passing: (Post) Post-Racialism, (Post) Post-Modernism, and (Post) Post-Marxism
Creators: name: Sundquist, Christian B.
Publisher: name: Columbia Journal of Race and Law
Year: 2011

description: The social and legal relevance of racial passing appears to be fading as we ostensibly enter a color-blind, post-race era. During the “Age of Obama,” the notion of passing in our multi-racial society seems to many to be antiquated and unnecessary. As the nation has moved beyond state-sanctioned racial discrimination, many believe that the country also has moved beyond the need for a legal dialogue on racial passing and ambiguity. This “retreat from race,” exemplified in part by the apparent declining significance of racial passing, proclaims that the state no longer should consider race when interpreting the law or incorporating democratic values of equality and opportunity. This Essay, however, argues that the continued phenomenon of racial passing can be utilized as a conceptual vehicle to destabilize and de-legitimatize the post-racial agenda.
description: Columbia Journal of Race and Law, Vol. 1 No. 3 (2011)
L1$_0$ FePt thin films with tilted and in-plane magnetic anisotropy: first-principles study
Creators: name: Marciniak, Joanna
name: Werwiński, Mirosław
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ultrathin L1$_0$ films with different $c$-axis orientations relative to the film plane are promising candidates for data storage materials. In this work, within the framework of density functional theory, we calculated the magnetic properties of ultrathin L1$_0$ (111) and (010) films with thicknesses ranging from 4 to 16 atomic monolayers (from about 0.8 to 3.5~nm). The highest average magnetic moments are observed for the thinnest films considered, and with increasing film thickness, the values converge towards the magnetic moment for bulk. The observed increase comes mainly from enhanced moments in the two atomic monolayers closest to the surface of the films. The easy axis of magnetization of (111) films prefers an alignment close to the tetragonal axis, an example of tilted magnetic anisotropy. The 6-monolayer (111) film (about 1.3~nm thick) inclines the easy axis of magnetization of about 45° to the film plane, which can find use in applications. The (010) films show an in-plane easy magnetization axis in a unique L1$_0$ tetragonal direction. This is an unusual type of in-plane anisotropy, as the particular direction preference is very strong. The computational results encourage further experimental studies of L1$_0$ systems with tilted and in-plane fixed magnetic anisotropy.
description: 12 pages, 12 figures
Used Up and Misused: The Nation State, the European Union and the Insistent Presence of the Colonial
Creators: name: Tuitt, Patricia
Publisher: name: Columbia Journal of Race and Law
Year: 2011

description: This Essay will assert that, through the migration and settlement of people and the movement of goods and capital, the savage, bankrupt estate of the old order in Europe has been appropriated. The way in which the member states of the E.U. have appropriated territories is similar to the migration and movement of units of production to the lands occupied by people considered primitive in earlier historical periods and in other geographical locations. Far from witnessing the birth of a political community without precise historical precedent, the origins of the European Union are distressingly familiar.
description: Columbia Journal of Race and Law, Vol. 1 No. 3 (2011)
Becke-Johnson-type exchange potential for two-dimensional systems
Creators: name: Pittalis, S.
name: Rasanen, E.
name: Proetto, C. R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We extend the Becke-Johnson approximation [J. Chem. Phys. 124, 221101 (2006)] of the exchange potential to two dimensions. We prove and demonstrate that a direct extension of the underlying formalism may lead to divergent behavior of the potential. We derive a cure to the approach by enforcing the gauge invariance and correct asymptotic behavior of the exchange potential. The procedure leads to an approximation which is shown, in various quasi-two-dimensional test systems, to be very accurate in comparison with the exact exchange potential, and thus a considerable improvement over the commonly applied local-density approximation.
description: submitted to Phys. Rev. B on July 9th, 2009
Hewitt-Marczewski-Pondiczery type theorem for abelian groups and Markov's potential density
Creators: name: Dikranjan, Dikran
name: Shakhmatov, Dmitri
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Topology (math.GN)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 22A05 (Primary); 20K99, 22C05, 54A25, 54B10, 54D65 (Secondary)

description: For an uncountable cardinal τand a subset S of an abelian group G, the following conditions are equivalent: (i) |{ns:s\in S}|\ge τfor all integers n\ge 1; (ii) there exists a group homomorphism π:G\to T^{2^τ} such that π(S) is dense in T^{2^τ}. Moreover, if |G|\le 2^{2^τ}, then the following item can be added to this list: (iii) there exists an isomorphism π:G\to G' between G and a subgroup G' of T^{2^τ} such that π(S) is dense in T^{2^τ}. We prove that the following conditions are equivalent for an uncountable subset S of an abelian group G that is either (almost) torsion-free or divisible: (a) S is T-dense in G for some Hausdorff group topology T on G; (b) S is T-dense in some precompact Hausdorff group topology T on G; (c) |{ns:s\in S}|\ge \min{τ:|G|\le 2^{2^τ}} for every integer n\ge 1. This partially resolves a question of Markov going back to 1946.
Post Race Posthaste: Towards an Analytical Convergence of Critical Race Theory and Marxism
Creators: name: Young, Donna E.
Publisher: name: Columbia Journal of Race and Law
Year: 2011

description: African Americans and other people of color seek redress for their racial injuries. However, if we are living in a post-racial society, one that is blind to race, then widespread redress makes no sense since widespread discrimination allegedly is a thing of the past. Therefore, it is worth asking, “if racial justice is about remembering racial injury, ha[s] our law made that memory impossible, erased by official color-blindness?” This question has been central to the study of law among Critical Race theorists since Critical Race Theory’s (CRT) inception. Therefore, an analytical convergence of CRT and Marxism should help disentangle the morass that is antidiscrimination law. The connection between Marxism and CRT can be appreciated by examining the limitations of civil rights laws in alleviating some of the most pressing social and political stresses on communities of color today. And yet, the connection seems to get lost beneath the din of those who claim that we are experiencing our first post-racial moment in a larger post-Marxist epoch. The aim of this Essay is to examine how a convergence of Marxism and CRT might enhance a critique of the U.S. Supreme Court’s interpretation of race discrimination under Title VII of the 1964 Civil Rights Act.
description: Columbia Journal of Race and Law, Vol. 1 No. 3 (2011)
Racial Profiling Legalized in Arizona
Creators: name: Cohn, Marjorie
Publisher: name: Columbia Journal of Race and Law
Year: 2011

description: In 2010, Arizona enacted S.B. 1070, which, by its very terms, necessitates racial profiling. The definition of racial profiling is “the reliance on race, skin color and/or ethnicity as an indication of criminality, reasonable suspicion, or probable cause, except when part of a description of a suspect, and said description is timely, reliable, and geographically relevant.” Although the new statute says that law enforcement officers “may not consider race, color or national origin in the enforcement of this section,” that language is followed by the words, “except to the extent permitted by the United States or Arizona Constitution.” Indeed, S.B. 1070 effectively requires the consideration of race, color and national origin because it is unfathomable how a law enforcement official could avoid considering those factors in deciding whom to investigate under the new law. Even the most well-meaning officer cannot possibly determine whether an individual may be undocumented without making judgments based on apparent race, color and national origin.
description: Columbia Journal of Race and Law, Vol. 1 No. 2 (2011)
Design and evaluation of visual cues for human-robot collaboration in carbon fiber-reinforced polymer (CFRP) manufacturing
Creators: name: Chen, Delun
Publisher: name: University of British Columbia
Year: 2023

description: Carbon fiber-reinforced polymer (CFRP) has been widely used in the automotive and aerospace industries. The current manufacturing process associated with vacuum bagging requires at least two trained technicians with expertise to manually manipulate the materials. To alleviate the physical demands on technicians, a robot arm with end-of-arm tooling (EOAT) was developed to collaborate with them and assist with pleat formation and migration tasks. However, encountering this robot without prior understanding of its behaviour can lead to frustration, confusion, or a high learning curve. This thesis evaluates robot visual cues designed for human-robot collaboration in the context of a simulated CFRP manufacturing vacuum bagging process. By communicating gripper force information to technicians, these cues aim to enhance the interpretability of the robot's behaviour and reduce the workload experienced during the human-robot interaction. This study first implemented the mechatronic system to control the robot's gripper force under both semi-automatic and automatic pleating modes, and then developed four visual cues based on light brightness, colour gradient, loading progress bar, and flashing light to convey system status to the operator under both modes. The results indicate that the colour gradient and loading progress bar are significantly more suitable for indicating gripper force compared to the other patterns. These patterns exhibit significantly higher legibility, intuitiveness and interactivity, leading to reduced human perceived mental load, effort, and frustration. Participants prefer operating the robot using the automatic mode, which improves the overall performance of the robot. Additionally, all designed cues outperform the no cue condition, highlighting the importance of visual feedback for users to understand the robot’s behaviour during human-robot collaboration.
title: Теория, методика и практика физического воспитания
title: Учебное пособие
titleType: Subtitle
Creators: name: Сафошин А.В.
name:  Иванков Ч.Т.
name:  Габбазова А.Я.
name:  Мухаметова С.Ч.
Publisher: name: Московский педагогический государственный университет
Year: 2019

description: Данное учебное пособие представлено в виде курса лекций. Каждая лекция является законченным разделом, отражающим решение одной из проблем физической культуры и спорта. В заключительной части раздела приводится перечень вопросов для подготовки к зачету, рекомендуемая литература, текстовый материал. В публикации раскрывается роль физической культуры и спорта в формировании всесторонне гармонически развитой личности, решении педагогических задач физического воспитания, изучении закономерностей процесса обучения и изменения работоспособности во время занятий с учетом физиологических и психологических особенностей занимающихся. Пособие рекомендуется для докторантов, аспирантов, магистрантов, бакалавров, студентов высших и средних образовательных учреждений физической культуры и спорта. Основной акцент делается на изучении данного пособия студентами заочной формы обучения.
description: This textbook presented in the form of lectures. Each lecture is a complete section,, reflecting the decision of one of problems of physical culture and sports. In the final part provides a list of questions to prepare for the test, recommended reading, text material. The publication reveals the role of physical culture and sports in the formation of the comprehensively harmoniously developed personality, the decision of pedagogical problems of physical education, the study of the regularities of the learning process, and health changes during employment, taking into account physiological and psychological characteristics of the student. The recommended allowance for doctoral students, graduate students, undergraduates, bachelors, students of higher and secondary educational institutions of physical culture and sports. The main focus is on the study of this tool by students of the correspondence form of training.
Cosmological scaling solutions in generalised Gauss-Bonnet gravity theories
Creators: name: Uddin, Kotub
name: Lidsey, James E.
name: Tavakol, Reza
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The conditions for the existence and stability of cosmological power-law scaling solutions are established when the Einstein-Hilbert action is modified by the inclusion of a function of the Gauss-Bonnet curvature invariant. The general form of the action that leads to such solutions is determined for the case where the universe is sourced by a barotropic perfect fluid. It is shown by employing an equivalence between the Gauss-Bonnet action and a scalar-tensor theory of gravity that the cosmological field equations can be written as a plane autonomous system. It is found that stable scaling solutions exist when the parameters of the model take appropriate values.
description: 10 pages and 5 figures
Analogue of atomic collapse for adatoms on rhombohedral multilayer graphene
Creators: name: Silva, W. C.
name: Sanches, J. E.
name: Freitas, A. M.
name: Lustosa, L. T.
name: de Souza, M.
name: Seridonio, A. C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose that a multi-graphene of ABC-type stacking yields virtual bound states lying within the Coulomb insulating gap of an Anderson-like adatom. Wondrously, a virtual state constitutes the counterpart of the atomic collapse phenomenon proposed in relativistic atomic Physics, while the second emerges as its particle-hole symmetric, analogous to a positron state. Thus, we introduce the effect as the adatomic collapse, which occurs due to a flat band with a dispersionless state and a divergent density of states $\sim|\varepsilon-\varepsilon_{F}|^{2/J-1}$ near the Fermi energy $\varepsilon_{F}$ for $J\geq3,$ where $Jπ$ is the Berry phase. We conclude this scenario based on the Kramers-Kronig transformation of the quasiparticle broadening, from where we observe that the aforementioned van Hove singularity induces virtual bound states. Counterintuitively, near the singularity, we find these states above and below the Fermi energy correlated to the existence of the bottom and top edges of the Coulomb insulating region, respectively. As such a behavior rises without a twist, the system is known as Moiréless and the phenomenon emerges also assisted by the adatom Coulomb correlations. Similarly to Science 340, 734 (2013) we find the effective critical atomic number $\mathcal{Z}_{c}\sim0.96$ in contrast to an ultra-heavy nucleus. Thus, we point out that multi-graphene is a proper playground for testing a predicted phenomenon of the relativistic atomic Physics in the domain of the condensed matter Physics.
Associating fast radio bursts with compact binary mergers via gravitational lensing
Creators: name: Singh, Mukesh Kumar
name: Kapadia, Shasvath J.
name: Basak, Soummyadip
name: Ajith, Parameswaran
name: Tendulkar, Shriharsh P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The origin of fast radio bursts (FRBs) is currently an open question with several proposed sources and corresponding mechanisms for their production. Among them are compact binary coalescences (CBCs) that also generate gravitational waves (GWs). Spatial and temporal coincidences between GWs and FRBs have so far been used to search for potential FRB counterparts to GWs from CBCs. However, such methods suffer from relatively poor sky-localisation of the GW sources, and similarly poor luminosity distance estimates of both GW and FRB sources. The expected time delay between the GW and radio emission is also poorly understood. In this work, we propose an astrophysical scenario that could potentially provide an unambiguous association between CBCs and FRBs, if one exists, or unambiguously rule out FRB counterparts to a given CBC GW event. We demonstrate that, if a CBC that emitted both GWs and FRBs, is gravitationally lensed, we can make a $> 5σ$ association using time-delay estimates of the lensed GW and FRB images (in strong lensing), which are expected to be measured with mili-second (for GW) and nano-second (FRB) precisions. We also demonstrate that the CBC-FRB association can be made in the microlensing regime as well where wave-optics effects modulate the GW waveform. We further investigate the rate of such detected associations in future observing scenarios of both GW and radio detectors.
description: 11 pages, 7 figures
Protecting Plyler: New Challenges to the Right of Immigrant Children to Access a Public School Education
Creators: name: Ofer, Udi
Publisher: name: Columbia Journal of Race and Law
Year: 2011

description: Close to thirty years ago, the Supreme Court ruled in Plyler v. Doe that undocumented children have the same right to access a public school education as children who are United States citizens or immigrant children lawfully admitted to the United States. Yet today, undocumented children still face significant hurdles when attempting to access a public school education. Moreover, new questions have arisen about the right of children on nonimmigrant visas to enroll in school. This Article reviews the Plyler decision and subsequent attempts to reverse the ruling. The Article examines the rise of the modern-day movement to restrict immigration and the impact of this movement on the right of immigrant children to access a public school education. The Article considers several examples of school districts preventing immigrant children from enrolling in schools, and argues that children on nonimmigrant B visas should not be denied enrollment. Finally, the Article concludes by recommending numerous steps for the federal government to take to ensure that school districts provide equal access to an education to all immigrant children.
description: Columbia Journal of Race and Law, Vol. 1 No. 2 (2011)
Measurement of W-Boson Polarization in Top-quark Decay in ppbar Collisions at sqrt(s) = 1.96 TeV
Creators: name: The CDF Collaboration
name: Aaltonen, T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report measurements of the polarization of W bosons from top-quark decays using 2.7 fb^-1 of ppbar collisions collected by the CDF II detector. Assuming a top-quark mass of 175 GeV/c^2, three measurements are performed. A simultaneous measurement of the fraction of longitudinal (f_0) and right-handed (f_+) W bosons yields the model-independent results f_0 = 0.88 \pm 0.11 (stat) \pm 0.06 (syst) and f_+ = -0.15 \pm 0.07 (stat) \pm 0.06 (syst) with a correlation coefficient of -0.59. A measurement of f_0 (f_+) constraining f_+ (f_0) to its standard model value of 0.0 (0.7) yields f_0 = 0.70 \pm 0.07 (stat) \pm 0.04 (syst) (f_+ = -0.01 \pm 0.02 (stat) \pm 0.05 (syst)). All these results are consistent with standard model expectations.
description: submitted to Phys. Rev. Lett
Innovative Responses to Foreclosures: Paths to Neighborhood Stability and Housing Opportunity
Creators: name: Steil, Justin P.
Publisher: name: Columbia Journal of Race and Law
Year: 2011

description: This Article argues that the current foreclosure crisis illustrates how economic stability and racial justice are intertwined. Recent research has found that the more racially segregated a metropolitan region is, the higher the number and rate of its foreclosures. Indeed, the high levels of racial residential segregation in the U.S. facilitated discriminatory and abusive lending practices and contributed to instability in regional housing markets. The Article contends that current fair housing laws alone are insufficient to dismantle the economic and political structures that continue to produce segregation, particularly the architecture of fragmented and unequal local governments competing with each other for resources. Responses to foreclosures provide an opportunity to chip away at these incentives for segregation by encouraging regional collaboration and shared-equity homeownership structures. Two promising examples of such collaboration are examined: first, a partnership between local governments and non-profits conducting targeted redevelopment through the federal Neighborhood Stabilization Program; and, second, a joint effort by a community development financial institution and a community development corporation to buy portfolios of distressed notes at a discount in order to rehabilitate scattered-site properties as affordable housing. Building on these examples, the Article proposes that the next significant step toward creating durable solutions is for municipalities to support shared-equity homeownership structures designed to create permanent affordability and neighborhood stability. Innovative responses to foreclosures from federal, state, and local policymakers hold the promise of advancing both economic security and racial justice.
description: Columbia Journal of Race and Law, Vol. 1 No. 1 (2011)
Short-period variability in the Class II methanol maser source G12.89+0.49 (IRAS 18089-1732)
Creators: name: Goedhart, S.
name: Langa, M. C.
name: Gaylard, M. J.
name: van der Walt, D. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Time series are presented for the class II methanol maser source G12.89+0.49, which has been monitored for nine years at the Hartebeesthoek Radio Astronomy Observatory. The 12.2 and 6.7 GHz methanol masers were seen to exhibit rapid, correlated variations on timescales of less than a month. Daily monitoring has revealed that the variations have a periodic component with a period of 29.5 days. The period seems to be stable over the 110 cycles spanned by the time series. There are variations from cycle to cycle, with the peak of the flare occurring anywhere within an eleven day window but the minima occur at the same phase of the cycle. Time delays of up to 5.7 days are seen between spectral features at 6.7 GHz and a delay of 1.1 day is seen between the dominant 12.2 GHz spectral feature and its 6.7 GHz counterpart.
description: Accepted by MNRAS. 18 pages, 20 figures
Su La città morta, Tragedia
Creators: name: Guaragnella, Pasquale
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

Luigi Pirandello wrote in a review about d’Annunzio’s La città morta that “no one, today fortunately, speaks like the characters in this tragedy”. However, indirectly replying to him as to other detractors, d’Annunzio observed that those who criticised his work showed that they “did not understand what tragic art is”. In support of his poetics, d’Annunzio cited the Sophocles models of Agamennone and Antigone. But there is more. D’Annunzio founded a theatre of ‘high’ speech, which was counterpointed by the silences of the characters and an action that took place mainly in the ‘interiors’. This choice made it possible to propose a peculiar furnishing philosophy related to sepulchral aspects and an intense idea of death. Above all, it was the notion of time that was deeply traversed by d’Annunzio’s experience of the tragic, a sign that the discovery of the tombs of the Atrides – the central topic of the work – on the one hand cancelled the “errors of time“ suspended between a remote past and an inert present, but on the other hand it exhumed a world of terrible passions like incestuous drives. This was intended to be the profound meaning of the tragic theatre founded by d’Annunzio with La città morta.

description: Archivio d’Annunzio
Correlations between perturbation theory and power corrections in QCD at zero and finite temperature
Creators: name: Megias, E.
name: Arriola, E. Ruiz
name: Salcedo, L. L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The duality between QCD perturbative series and power corrections recently conjectured by Narison and Zakharov is analyzed. We propose to study correlations between both contributions as diagnostics tool. A very strong correlation between perturbative and non perturbative contributions is observed for several observables at zero and at finite temperature supporting the validity of the dual description.
description: 7 pages, 5 figures, 7 tables
L’ultima variante di Francesca da Rimini
Creators: name: Maiolini, Elena
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

The article informs about the variation in Francesca da Rimini’s explicit between the printed edition (1902) and the autographed manuscript written in the summer of 1901. The reasons of this variation are reconstructed thanks to the documents kept in the Biblioteca Nazionale Centrale of Rome, in the Archivio Eleonora Duse of the Istituto per il Teatro e il Melodramma of the Fondazione Giorgio Cini in Venice and in the Georges Hérelle collection of the Médiathèque Jacques-Chirac of Troyes.

description: Archivio d’Annunzio
Is ERISA Preemption Superfluous in the New Age of Health Care Reform?
Creators: name: Jensen, Mallory
Publisher: name: Columbia Business Law Review
Year: 2019

description: In June 2010, the Department of Justice (DOJ) submitted a brief to the United States Supreme Court opposing the grant of certiorari in litigation over the legality of San Francisco’s recent health reform law. The claim in the case was that ERISA, which had long preempted a variety of state health reform efforts, also preempted the San Francisco reform. The DOJ, however, recommended against Supreme Court review in large part because of the new federal health care reform law, the Affordable Care Act (“ACA”), had recently been enacted, and even the government was unprepared to predict with confidence its effect on previously settled areas of law like the one at issue in San Francisco. Because the federal reform was so new, the DOJ argued, it was premature for the Court to hear the case. But the ACA is no longer so new, and though Supreme Court review of the question arising from the San Francisco reform may not have been advisable, it is critical to obtain more clarity now about the ACA’s interaction with other major laws. In particular, one of the principal sources of uncertainty is the ACA’s relationship to ERISA. ERISA preempts any state laws that “relate to” employer-provided health benefits. Although the ACA is a federal law and thus not preempted by ERISA itself, the states must implement much of it. Yet despite ERISA’s reputation as a state reform-killer, Congress did not address whether it would have any preemptive effect once the ACA rolled out. Can the states implement reforms mandated with the ACA without running afoul of ERISA? What about ERISA’s effects on states’ non-ACA reforms going forward? And then there is the middle ground: state reform plans that receive waivers through the ACA. These have recently received much publicity, but will state reforms that get an ACA waiver be able to avoid ERISA preemption?
description: Columbia Business Law Review, Vol. 2011 No. 2
Multi-material heterogeneous integration on a 3-D Photonic-CMOS platform
Creators: name: Ranno, Luigi
name: Sia, Jia Xu Brian
name: Dao, Khoi Phuong
name: Hu, Juejun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Photonics has been one of the primary beneficiaries of advanced silicon manufacturing. By leveraging on mature complementary metal-oxide-semiconductor (CMOS) process nodes, unprecedented device uniformities and scalability have been achieved at low costs. However, some functionalities, such as optical memory, Pockels modulation, and magnetooptical activity, are challenging or impossible to acquire on group-IV materials alone. Heterogeneous integration promises to expand the range of capabilities within silicon photonics. Existing heterogeneous integration protocols are nonetheless not compatible with active silicon processes offered at most photonic foundries. In this work, we propose a novel heterogeneous integration platform that will enable wafer-scale, multi-material integration with active silicon-based photonics, requiring zero-change to existing foundry process. Furthermore, the platform will also pave the way to a class of high-performance devices. We propose a grating coupler design with peak coupling efficiency reaching 93%, an antenna with peak diffraction efficiency in excess of 97%, and a broadband adiabatic polarization rotator with conversion efficiency exceeding 99%.
Sulle onde del «canto dell’antico sangue»: incipit ed explicit di La figlia di Iorio
Creators: name: Sgroi, Alfredo
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

The pastoral drama La figlia di Iorio (1904) is a concentrate of musical and linguistic experiments. Incipit and explicit have a very important function in it. In fact, they characterise the ‘stacchi’ or ties that characterise this text with a complex and undulating architecture, similar to a symphony. In this essay, these very important moments in the economy of tragedy are analysed.

description: Archivio d’Annunzio
The Vimos VLT Deep Survey: Stellar mass segregation and large-scale galaxy environment in the redshift range 0.2
Creators: name: Scodeggio, M.
name: Vergani, D.
name: Cucciati, O.
name: Iovino, A.
name: Franzetti, P.
name: Garilli, B.
name: Lamareille, F.
name: Bolzonella, M.
name: Pozzetti, L.
name: Abbas, U.
name: Marinoni, C.
name: Contini, T.
name: Bottini, D.
name: Brun, V. Le
name: Fevre, O. Le
name: Maccagni, D.
name: Scaramella, R.
name: Tresse, L.
name: Vettolani, G.
name: Zanichelli, A.
name: Adami, C.
name: Arnouts, S.
name: Bardelli, S.
name: Cappi, A.
name: Charlot, S.
name: Ciliegi, P.
name: Foucaud, S.
name: Gavignaud, I.
name: Guzzo, L.
name: Ilbert, O.
name: McCracken, H. J.
name: Marano, B.
name: Mazure, A.
name: Meneux, B.
name: Merighi, R.
name: Paltani, S.
name: Pello, R.
name: Pollo, A.
name: Radovich, M.
name: Zamorani, G.
name: Zucca, E.
name: Bondi, M.
name: Bongiorno, A.
name: Brinchmann, J.
name: de la Torre, S.
name: de Ravel, L.
name: Gregorini, L.
name: Memeo, P.
name: Perez-Montero, E.
name: Mellier, Y.
name: Temporin, S.
name: Walcher, C. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Hierarchical models of galaxy formation predict that the properties of a dark matter halo depend on the large-scale environment surrounding the halo. As a result of this correlation, we expect massive haloes to be present in larger number in overdense regions than in underdense ones. Given that a correlation exists between a galaxy stellar mass and the hosting dark matter halo mass, the segregation in dark matter halo mass should then result in a segregation in the distribution of stellar mass in the galaxy population. In this work we study the distribution of galaxy stellar mass and rest-frame optical color as a function of the large-scale galaxy distribution using the VLT VIMOS Deep Survey sample, in order to verify the presence of segregation in the properties of the galaxy population. We use the VVDS redshift measurements and multi-band photometric data to derive estimates of the stellar mass, rest-frame optical color, and of the large-scale galaxy density, on a scale of approximately 8 Mpc, for a sample of 5619 galaxies in the redshift range 0.20.7. However, when we consider only galaxies in narrow bins of stellar mass, in order to exclude the effects of the stellar mass segregation on the galaxy properties, we do not observe any more any significant color segregation.
description: 7 pages, 5 figures; accepted for publication in Astronomy and Astrophysics
Model Pruning Enables Localized and Efficient Federated Learning for Yield Forecasting and Data Sharing
Creators: name: Li, Andy
name: Markovic, Milan
name: Edwards, Peter
name: Leontidis, Georgios
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Federated Learning (FL) presents a decentralized approach to model training in the agri-food sector and offers the potential for improved machine learning performance, while ensuring the safety and privacy of individual farms or data silos. However, the conventional FL approach has two major limitations. First, the heterogeneous data on individual silos can cause the global model to perform well for some clients but not all, as the update direction on some clients may hinder others after they are aggregated. Second, it is lacking with respect to the efficiency perspective concerning communication costs during FL and large model sizes. This paper proposes a new technical solution that utilizes network pruning on client models and aggregates the pruned models. This method enables local models to be tailored to their respective data distribution and mitigate the data heterogeneity present in agri-food data. Moreover, it allows for more compact models that consume less data during transmission. We experiment with a soybean yield forecasting dataset and find that this approach can improve inference performance by 15.5% to 20% compared to FedAvg, while reducing local model sizes by up to 84% and the data volume communicated between the clients and the server by 57.1% to 64.7%.
description: 31 pages, 4 figures, 4 tables
Il gioco delle antifrasi nell’incipit della Fiaccola sotto il moggio
Creators: name: Pasquini, Luciana
Publisher: name: Fondazione Università Ca’ Foscari Venezia, Italia
Year: 2021

description:

The textual incipit of the second Abruzzo tragedy by Gabriele d’Annunzio, La fiaccola sotto il moggio (1905), defines its character in close relationship with three literary references: the Vangeli (of Luca, Matteo and Marco), the Coefore of Eschilo and La figlia di Iorio (1903; ed. 1904) by the poet himself. The analysis of the first portion of the dramaturgical text shows how, starting from the initial atmospheres, the author loves the game of antiphrastic references with those works, which constitute the filigree of the poetic construction through thematic and conceptual references. Above all, the inverse morality that animates Gigliola, the protagonist, emerges in relation with the evangelical premises contained in the title, as well as the subversion of the tragic order of the classical matrix which also inspires the text.

description: Archivio d’Annunzio
Electron-phonon interaction in Strongly Correlated Systems
Creators: name: Capone, M.
name: Castellani, C.
name: Grilli, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The Hubbard-Holstein model is a simple model including both electron-phonon interaction and electron-electron correlations. We review a body of theoretical work investigating the effects of strong correlations on the electron-phonon interaction. We focus on the regime, relevant to high-T_c superconductors, in which the electron correlations are dominant. We find that the electron-phonon interaction can still have important signatures, even if many anomalies appear, and the overall effect is far from conventional. In particular in the paramagnetic phase the effects of phonons are much reduced in the low-energy properties, while the high-energy physics can be strongly affected by phonons. Moreover, the electron-phonon interaction can still give rise to important effects, like phase separation and charge-ordering, and it assumes a predominance of forward scattering even if the bare interaction is assumed to be local (momentum independent). Antiferromagnetic correlations reduce the screening effects due to electron-electron interactions and revive the electron-phonon effects.
description: 15 pages, 12 figures
Robo-Advisers and the Suitability Requirement
Creators: name: Carney, Caelainn
Publisher: name: Columbia Business Law Review
Year: 2019

description: Robo-advisers, which provide algorithmic investment advice, are becoming increasingly prevalent players in the financial services industry. As their prominence grows, regulators are working to determine where they fit in the current framework. Specifically, the Securities and Exchange Commission has been working toward setting standards for robo-advisers as they seek to provide suitable advice to investors. In November 2016, the Securities and Exchange Commission held its Fintech Forum, where regulators and industry leaders commented on the suitability requirement and how robo-advisers can meet it. This Note analyzes the current regulatory framework for robo-advisers and proposes ways that regulators can tailor the suitability requirement to digital investment advice.
description: Columbia Business Law Review, Vol. 2018 No. 2
Orbital Architectures of Kepler Multis From Dynamical Instabilities
Creators: name: Ghosh, Tuhin
name: Chatterjee, Sourav
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The high-multiplicity exoplanet systems are generally more tightly packed when compared to the solar system. Such compact multi-planet systems are often susceptible to dynamical instability. We investigate the impact of dynamical instability on the final orbital architectures of multi-planet systems using N-body simulations. Our models initially consist of six to ten planets placed randomly according to a power-law distribution of mutual Hill separations. We find that almost all of our model planetary systems go through at least one phase of dynamical instability, losing at least one planet. The orbital architecture, including the distributions of mutual Hill separations, planetary masses, orbital periods, and period ratios, of the transit-detectable model planetary systems closely resemble those for the multi-planet systems detected by Kepler. We find that without any formation-dependent input, a dynamically active past can naturally reproduce important observed trends including multiplicity-dependent eccentricity distribution, smaller eccentricities for larger planets, and intra-system uniformity. On the other hand, our transit-detectable planet populations lack the observed sub-population of eccentric single-transiting planets, pointing towards the Kepler dichotomy. These findings indicate that dynamical instabilities may have played a vital role in the final assembly of sub-Jovian planets.
description: 15 pages, 15 figures; published in MNRAS
Optimistic Thompson sampling : strategic exploration in bandits and reinforcement learning
Creators: name: Zhang, Tianyue H.
Publisher: name: University of British Columbia
Year: 2023

description: Reinforcement learning (RL) is an area of machine learning where intelligent agents take sequential actions in an environment and learn from experience to maximize rewards. This is particularly useful when the dynamics of the environment are complex and explicit training data is limited, such as in autonomous driving, robotics, game-playing, recommendation systems, finance and health care. The main challenge in RL is to balance between exploration (taking less observed actions to gather information) and exploitation (taking actions with high historical reward). Stochastic Multi-arm bandits (MABs) can be viewed as a simplified decision-making problem where the state of the agent does not change by the actions. The rich existing bandit theory provides insights into tackling expiration-exploitation trade-offs in RL. In this work, we draw inspiration from the classical bandit algorithms upper confidence bound (UCB) and Thompson sampling (TS), and propose a novel algorithm in RL: Optimistic Thompson sampling. Optimism encourages exploration: Agents can gain information by being optimistic and playing actions that are estimated to be sub-optimal but are not sufficiently sampled. We first discuss our performance metric in theoretical analysis, namely regret. Regret measures how the algorithm performs compared to the optimal strategy if the rewards and dynamics of the environment are known. We then provide a novel theoretical analysis of the optimistic Thompson sampling (O-TS) [Chapelle and Li, 2011] algorithms in bandits. Next, we extend the algorithms to the Markov decision process (MDP) setting, a common representation for RL problems. We propose two novel algorithms, O-TS-MDP and O-TS-MDP+. We compare their performance to existing work both theoritically and with numerical experiments. Finally, we conclude our work with a discussion of future directions for strategic exploration in bandits and RL.
From Vicious Walkers to TASEP
Creators: name: Dorlas, T. C.
name: Povolotsky, A. M.
name: Priezzhev, V. B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We propose a model of semi-vicious walkers, which interpolates between the totally asymmetric simple exclusion process and the vicious walkers model, having the two as limiting cases. For this model we calculate the asymptotics of the survival probability for $m$ particles and obtain a scaling function, which describes the transition from one limiting case to another. Then, we use a fluctuation-dissipation relation allowing us to reinterpret the result as the particle current generating function in the totally asymmetric simple exclusion process. Thus we obtain the particle current distribution asymptotically in the large time limit as the number of particles is fixed. The results apply to the large deviation scale as well as to the diffusive scale. In the latter we obtain a new universal distribution, which has a skew non-Gaussian form. For $m$ particles its asymptotic behavior is shown to be $e^{-\frac{y^{2}}{2m^{2}}}$ as $y\to -\infty $ and $e^{-\frac{y^{2}}{2m}}y^{-\frac{m(m-1)}{2}}$ as $y\to \infty $.
description: 37 pages, 4 figures, Corrected references
ICO’s, DAO’s, and the SEC
Creators: name: Oren, Ori
Publisher: name: Columbia Business Law Review
Year: 2019

description: In the summer of 2017, a new method of funding startup businesses exploded from a small capital market to one worth billions. “Initial Coin Offerings” (“ICOs”) can appear to be a simple crowdfunding campaign or a public stock offering at the same time and, until recently, have been conducted with no regulatory oversight. Due to the high risk of fraud, the SEC has begun cracking down on ICOs, requiring many issuers to register their “ICO tokens” as securities or halt trading entirely. This Note looks at the regulatory precedents and factors that the SEC has considered to decide whether a token is a security, and proposes an alternative legal system to securities law that may be better suited for regulating certain types of ICO tokens. This Note concludes that, for ICOs that raise money for a decentralized autonomous organization—in which all token purchasers hold equal management rights—uniform partnership law is the ideal mode of regulation.
description: Columbia Business Law Review, Vol. 2018 No. 2
Scan, Copy, Print
Creators: name: Rana, Aliza
Publisher: name: Columbia Business Law Review
Year: 2019

description: Increased accessibility of 3D printing and scanning technology is pushing the boundaries of existing copyright law. From affordable countertop 3D printers to iPhones with 3D scanning capabilities, even in its early stages 3D technology is reshaping manufacturing. To manage the friction between the 3D printing community and copyright owners while avoiding the missteps of the film and music industries, it is important to evaluate the options for copyright management under the existing legal framework and consider their business implications. This Note contemplates the imposition of liability on different actors within the 3D scanning and printing community, focusing on online distribution platforms that host 3D scans of copyrighted works. This Note ultimately proposes a solution designed to minimize widespread copyright infringement, protect copyright owners’ rights to their works, and promote monitoring by these distribution platforms.
description: Columbia Business Law Review, Vol. 2018 No. 2
Gas phase mean opacities for varying [M/H], N/O, and C/O
Creators: name: Helling, Ch.
name: Lucas, W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a set of gas-phase Planck mean and Rosseland mean opacity tables applicable for simulations of star and planet formation, stellar evolution, disk modelling at various metallicities in hydrogen-rich environments. The tables are calculated for gas temperatures between 1000K and 10000K and total hydrogen number densities between 10^2 cm^-3 and 10^17 cm^-3. The carbon-to-oxygen ratio is varied from 0.43 to well above 2.0, the nitrogen-to-oxygen ration between 0.14 and 100.0. The tables are calculated for a range of metallicities down to [M/H]'= log N_M/N_H=-7.0. We demonstrate how the mean opacities and the abundances of the opacity species vary with C/O, N/O, and [M/H]'. We use the element abundances from Grevesse, Asplund & Sauval (2007), and we provide additional tables for the oxygen-abundance value from Caffau et al.(2008). All tables will be available online under http://star-www.st-and.ac.uk/$\sim$ch80/datasources.html
description: 10 pages, accepted for publication in MNRAS
Dissipative Boundary State Preparation
Creators: name: Yang, Fan
name: Molignini, Paolo
name: Bergholtz, Emil J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We devise a generic and experimentally accessible recipe to prepare boundary states of topological or nontopological quantum systems through an interplay between coherent Hamiltonian dynamics and local dissipation. Intuitively, our recipe harnesses the spatial structure of boundary states which vanish on sublattices where losses are suitably engineered. This yields unique nontrivial steady states that populate the targeted boundary states with infinite lifetimes while all other states are exponentially damped in time. Remarkably, applying loss only at one boundary can yield a unique steady state localized at the very same boundary. We detail our construction and rigorously derive full Liouvillian spectra and dissipative gaps in the presence of a spectral mirror symmetry for a one-dimensional Su-Schrieffer-Heeger model and a two-dimensional Chern insulator. We outline how our recipe extends to generic noninteracting systems.