cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
PT-symmetry and Integrability
Creators: name: Fring, Andreas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We briefly explain some simple arguments based on pseudo Hermiticity, supersymmetry and PT-symmetry which explain the reality of the spectrum of some non-Hermitian Hamiltonians. Subsequently we employ PT-symmetry as a guiding principle to construct deformations of some integrable systems, the Calogero-Moser-Sutherland model and the Korteweg deVries equation. Some properties of these models are discussed.
description: Proceeding of the Micro conference Analytic and algebraic methods II, Doppler Institute, Prague, April 2007
Outer jet X-ray and radio emission in R Aquarii: 1999.8 to 2004.0
Creators: name: Kellogg, E.
name: Anderson, C.
name: Korreck, K.
name: DePasquale, J.
name: Nichols, J.
name: Sokoloski, J. L.
name: Krauss, M.
name: Pedelty, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Chandra and VLA observations of the symbiotic star R Aqr in 2004 reveal significant changes over the three to four year interval between these observations and previous observations taken with the VLA in 1999 and with Chandra in 2000. This paper reports on the evolution of the outer thermal X-ray lobe-jets and radio jets. The emission from the outer X-ray lobe-jets lies farther away from the central binary than the outer radio jets, and comes from material interpreted as being shock heated to ~10^6 K, a likely result of collision between high speed material ejected from the central binary and regions of enhanced gas density. Between 2000 and 2004, the Northeast (NE) outer X-ray lobe-jet moved out away from the central binary, with an apparent projected motion of ~580 km s^-1. The Southwest (SW) outer X-ray lobe-jet almost disappeared between 2000 and 2004, presumably due to adiabatic expansion and cooling. The NE radio bright spot also moved away from the central binary between 2000 and 2004, but with a smaller apparent velocity than of the NE X-ray bright spot. The SW outer lobe-jet was not detected in the radio in either 1999 or 2004. The density and mass of the X-ray emitting material is estimated. Cooling times, shock speeds, pressure and confinement are discussed.
description: 23 pages, 8 figures
Superconductivity and Crystal Structures of (Ba1-xKx)Fe2As2 (x = 0 - 1)
Creators: name: Rotter, Marianne
name: Pangerl, Michael
name: Tegel, Marcus
name: Johrendt, Dirk
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report on doping dependencies of structural parameters and superconducting transition temperatures in the solid solution (Ba1-xKx)Fe2As2. As the main effect of doping on the crystal structure, we find linear decreasing As-Fe-As bond angles and Fe-Fe distances, equivalent to an elongation of the FeAs4 tetrahedra along [001]. The structural changes are intimately coupled to the electronic states at the Fermi level, because the most relevant Fe-3dx2-y2 orbitals are strongly affected by the As-Fe-As bond angle. Superconductivity is present over the whole doping range in (Ba1-xKx)Fe2As2 with a maximum Tc of 38 K at x ~ 0.4. The superconducting transitions in the orthorhombic compounds (Ba0.9K0.1)Fe2As2 (Tc ~ 3 K) and (Ba0.8K0.2)Fe2As2 (Tc ~ 25 K) is strong evidence for the coexistence of superconductivity with the structurally distorted and potentially magnetically ordered state in the BaFe2As2 family of iron arsenide superconductors.
description: 4 pages, 6 figures, text revised, one figure added, accepted for publication in Angew. Chem. Int. Ed
A Digital Humanities Reading List: Part 1, Policies and Profiles
Creators: name: LIBER Digital Humanities Working Group
Publisher: name: Zenodo
Year: 2018
Subjects: digital humanities

description: The recommendations in this article (the first in the series) have been assembled by the team in charge of Recommendations for identifying and establishing policies and profiles regarding digital humanities’ portfolios, led by Demmy Verbeke of KU Leuven.
Classifying Astronomical Images Using Deep Learning CNNs
Creators: name: Yosry Negm
Publisher: name: figshare
Year: 2021
Subjects: subject: Astrophysics
subject: Instrumentation, Techniques, and Astronomical Observations
subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: The investigation of applying Deep Learning algorithm in order to validate the astronomers' first step which is looking for interesting objects in a binary classification problem of determining what is real and what is not in the underlying massive astronomical data
Trimming Feature Extraction and Inference for MCU-based Edge NILM: a Systematic Approach
Creators: name: Tabanelli, Enrico
name: Brunelli, Davide
name: Acquaviva, Andrea
name: Benini, Luca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Non-Intrusive Load Monitoring (NILM) enables the disaggregation of the global power consumption of multiple loads, taken from a single smart electrical meter, into appliance-level details. State-of-the-Art approaches are based on Machine Learning methods and exploit the fusion of time- and frequency-domain features from current and voltage sensors. Unfortunately, these methods are compute-demanding and memory-intensive. Therefore, running low-latency NILM on low-cost, resource-constrained MCU-based meters is currently an open challenge. This paper addresses the optimization of the feature spaces as well as the computational and storage cost reduction needed for executing State-of-the-Art (SoA) NILM algorithms on memory- and compute-limited MCUs. We compare four supervised learning techniques on different classification scenarios and characterize the overall NILM pipeline's implementation on a MCU-based Smart Measurement Node. Experimental results demonstrate that optimizing the feature space enables edge MCU-based NILM with 95.15% accuracy, resulting in a small drop compared to the most-accurate feature vector deployment (96.19%) while achieving up to 5.45x speed-up and 80.56% storage reduction. Furthermore, we show that low-latency NILM relying only on current measurements reaches almost 80% accuracy, allowing a major cost reduction by removing voltage sensors from the hardware design.
Symmetries in quantum networks lead to no-go theorems for entanglement distribution and to verification techniques
Creators: name: Hansenne, Kiara
name: Xu, Zhen-Peng
name: Kraft, Tristan
name: Gühne, Otfried
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum networks are promising tools for the implementation of long-range quantum communication. The characterization of quantum correlations in networks and their usefulness for information processing is therefore central for the progress of the field, but so far only results for small basic network structures or pure quantum states are known. Here we show that symmetries provide a versatile tool for the analysis of correlations in quantum networks. We provide an analytical approach to characterize correlations in large network structures with arbitrary topologies. As examples, we show that entangled quantum states with a bosonic or fermionic symmetry can not be generated in networks; moreover, cluster and graph states are not accessible. Our methods can be used to design certification methods for the functionality of specific links in a network and have implications for the design of future network structures.
description: 22 pages, 18 figures, v2: extended and final version
Melanophryniscus cambaraensis
Creators: name: Caorsi, Valentina
name: Bordignon, Debora Wolff
name: Márquez, Rafael
name: Martins, Márcio Borges-
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Bufonidae
Melanophryniscus
Melanophryniscus cambaraensis

description: Melanophryniscus cambaraensis
We collected acoustic data of male calls in three different sample sites in Rio Grande do Sul, Brazil (Figure 1). We recorded Melanophryniscus cambaraensis during day and night on September 18 and 19 of 2012 in Floresta Nacional de São Francisco de Paula – FLONA SFP – a conservation unit (29°25’41.3”S, 50°23’44.5”W / 866 m asl) located in the municipality of São Francisco de Paula.
The advertisement call of Melanophryniscus cambaraensis from FLONA SFP has an average duration of 18.8 seconds (SD = 6.51) and it is composed of segments A and B (Figure 3 A–B). Part A is composed of 3–11 single modulated notes, each one composed of one pulse (of 0.02 seconds each), separated by long time intervals of 0.38 seconds (SD = 0.052). Call part B is an extremely long train of unmodulated pulses emitted at a rate of 35.8 pulses per second (SD = 3.1), with short time intervals (Mean = 0.02; SD = 0.002), and lasting from 9–32.2 seconds (Mean = 16.6; SD = 6.8) (Table 1). Peak frequency of both parts is quite similar being on average 2.2 kHz in part A (SD = 0.16) and 2.2 kHz in part B (SD = 0.17) (Table 1).
description: Published as part of Caorsi, Valentina, Bordignon, Debora Wolff, Márquez, Rafael & Martins, Márcio Borges-, 2020, Advertisement call of two threatened red-bellied-toads Melanophryniscus cambaraensis and M. macrogranulosus (Anura: Bufonidae), from the Atlantic Rainforest, southern Brazil, pp. 206-220 in Zootaxa 4894 (2) on page 210, DOI: 10.11646/zootaxa.4894.2.2, http://zenodo.org/record/4315653
Dynamics of laser-driven shock waves in fused silica
Creators: name: Celliers, Peter Martin
Publisher: name: University of British Columbia
Year: 2010

description: The formation of a laser-driven shock in fused silica was observed experimentally. Fused silica slabs were irradiated with 0.53 /µm laser light in a pulse of 2 ns FWHM at intensities ranging from 10¹² W/cm² to 5 x 10¹³ W/cm², producing a pressure pulse ranging from < 30 GPa to 500 GPa. Shock trajectories were observed using streaked shadowgram and schlieren methods. The experiment was modelled with a one-dimensional Lagrangean laser-plasma hydrocode. Comparison of the simulation results with the experimental observations indicate that the high pressure shock develops anomalously slowly at intensities > 1 x 10¹³ W/cm². Furthermore the shock displayed non-steady propagation for a transient period following its formation. The non-steady propagation is interpreted to be due to a relaxation process in the phase transformation of the fused silica to the high pressure stishovite phase which occurs in the shock front. The slow formation of the shock at high intensities is consistent with a significant volume collapse (phase transition) possibly induced by isentropic compression; however, this interpretation is uncertain due to the complications introduced by non-equilibrium thermodynamics and the possibility of two-dimensional motion.
The effective potential and resummation procedure to multidimensional complex cubic potentials for weak and strong-coupling
Creators: name: Yahiaoui, S. -A.
name: Cherroud, O.
name: Bentaiba, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 03.65.Ca; 05.30.-d; 03.65.-w; 02.30.Mv.

description: The method for the recursive calculation of the effective potential is applied successfully in case of weak coupling limit (g tend to zero) to a multidimensional complex cubic potential. In strong-coupling limit (g tend to infinity), the result is resumed using the variational perturbation theory (VPT). It is found that the convergence of VPT-results approaches those expected.
description: 19 pages, 0 figure
Eulerian numerical modeling of contaminant transport in Lower Manhattan, New York City, from a point-source release under the dominant wind condition: Insights gained via LES
Creators: name: Oaks, Wayne R.
name: Flora, Kevin
name: Khosronejad, Ali
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Released pollutants and poisonous chemicals in the highly-populated urban areas can spread via wind flow and affect the health, safety, and wellbeing of those close to the source and others downstream. Being able to predict the transport of airborne contaminants in such urban areas could help stakeholders to plan emergency responses. Airflow due to the wind in urban areas with closely packed buildings results in complicated aerodynamics around buildings that, in turn, can lead to intricate contaminant transport phenomena. We conduct high-resolution large-eddy simulation (LES) of airflow in Southern Manhattan, a highly-populated area in New York City, due to a dominant wind blowing from south to north. The LES results show complex flow dynamics around the buildings of various heights and, consequently, complicated contaminant transport processes from a source-point which is located in front of the New York Stock Exchange building at 30 m above ground. The flow tends to align with the streets that are fairly parallel to the wind direction creating high-velocity core regions, while the airflow loses its momentum markedly farther downwind in the urban area. For as long as the source of contamination exists, the pollution plume rapidly travels through the streets reaching downwind areas. When the source is removed, contaminants that are trapped in the low-momentum urban area linger to exit the flow domain.
description: 37 pages, 23 figures
Information Diffusion: A Study of Twitter During Large Scale Events
Creators: name: Rogers, Christa Daniella
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: System science
subject: Information science
subject: Content
subject: Diffusion
subject: Emergency
subject: Information
subject: Social
subject: Twitter

description: The diffusion of information through population affects how and when the public reacts in various situations. Thus, it is important to understand how and at what speed important information spreads. Social media platforms are important to track and understand such diffusion.  Twitter provides a convenient and effective way to measure it.  This study used data obtained from 15,000 Twitter users.  Data was collected on the following events: Hurricane Irene, Hurricane Sandy, Osama Bin Laden's capture, and the United States' 2012 Presidential Election.  Information such as the time of a tweet, the user name, content, and the ID was analyzed to measure the diffusion of information and track the trajectory of retweets. The spread of information was visualized and analyzed to determine how far and how fast the information spread. The results show how information spreads and the content analysis of data sets indicate the importance of different topics to users.
Dynamic Intervention: Reawakening the Detroit Boat Club
Creators: name: Kopf, Anne
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Architecture
subject: FOS: Civil engineering
subject: History
subject: Urban planning
subject: Adaptive Reuse
subject: Auto Industry
subject: Detroit
subject: Historic Preservation
subject: Motown
subject: Rowing

description: Built in 1902 on pilings in the Detroit River, the Detroit Boat Club (DBC), a stunning

Spanish Colonial building, was once a lively sport and social club. Its historic building fabric,

paralleling Detroit's rise and fall, stands as a monument to the city's downfall. What remains

today is the DBC Rowing Team, who, despite its success, relies on volunteers and meager

donations to maintain the decrepit building. In an attempt at revitalizing the DBC, this thesis

will explore the intricate connections between various elements of Detroit's social and

cultural history. Such elements include Detroit's music history, specifically Motown Records,

as well as the growth of the automotive industry. Through this exploration, this thesis project

will address the following question: to what extent can these cultural and social connections

be applied to the building revitalization process in a way that honors the building's past and

prepares it for a vibrant future?
Two-field Kähler moduli inflation on large volume moduli stabilization
Creators: name: Yang, Huan-Xiong
name: Ma, Hong-Liang
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we present a two-field inflation model, which distinguishes itself with a non-canonical kinetic lagrangian and comes from the large volume approach to the moduli stabilization in flux compactification of type IIB superstring on a Calabi-Yau orientifold of $h^{(1,2)} > h^{(1,1)}\geq 4$. The Kähler moduli are classified as volume modulus, heavy moduli and two light moduli. The axion-dilaton, complex structure moduli and all heavy Kähler moduli including the volume modulus are frozen by nonperturbatively corrected flux superpotential and the $α^\prime$-corrected Kähler potential in the large volume limit. The minimum of the scalar potential at which the heavy moduli are stabilized provides the dominant potential energy for the survived light Kähler moduli. We consider a simplified case where the axionic components in the light Kähler moduli are further stabilized at the potential minimum and only the geometrical components are taken as the scalar fields to drive an assisted-like inflation. For a certain range of moduli stabilization parameters and inflation initial conditions, we obtain a nearly flat power spectrum of the curvature perturbation, with $n_s\approx 0.96$ at Hubble-exit, and an inflationary energy scale of $3 \times 10^{14}$ GeV. In our model, significant correlation exists between the curvature and isocurvature perturbations on super-Hubble scales so that at the end of inflation a great deal of the curvature power spectrum originates from this correlation.
description: LaTeX file with 8 eps figures, references added, to be published in JCAP
The In/Visible: Re-Envisioning the Nightscape
Creators: name: Carr, Emily
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Architecture
subject: FOS: Civil engineering
subject: Darkness
subject: Light Pollution
subject: Night Sky
subject: Perception
subject: Phenomena
subject: Time

description: The purpose of this thesis is to develop an awareness of the disappearing natural resource of dark skies through the design of a project that fosters this awareness. The goal of the research is to re-envision how we as humans conventionally experience the nightscape and to forge a new meaningful human connection to darkness. By addressing and understanding the experience and value of dark skies, architecture can better be used as a tool for observation, creating a deeper appreciation of experience and phenomena. To accomplish these goals, this thesis proposes creating a place that will enhance our thoughts and perceptions about darkness. This thesis project explores the human connection to the night sky and darkness by using architecture as the lens and device for understanding the synchronicity between phenomena, perception and time.
Non-perturbative effective interactions from fluxes
Creators: name: Billo', M.
name: Ferro, L.
name: Frau, M.
name: Fucito, F.
name: Lerda, A.
name: Morales, J. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by possible implications on the problem of moduli stabilization and other phenomenological aspects, we study D-brane instanton effects in flux compactifications. We focus on a local model and compute non-perturbative interactions generated by gauge and stringy instantons in a N = 1 quiver theory with gauge group U(N_0) x U(N_1) and matter in the bifundamentals. This model is engineered with fractional D3-branes at a C^3/(Z_2 x Z_2) singularity, and its non-perturbative sectors are described by introducing fractional D-instantons. We find a rich variety of instanton-generated F- and D-term interactions, ranging from superpotentials and Beasley-Witten like multi-fermion terms to non-supersymmetric flux-induced instanton interactions.
description: 37 pages, 7 figures. Final version published on JHEP. Section 4 modified in several points regarding string corrections in absence of fluxes; in particular, section 4.3 is removed. Some other minor changes and two references added
Una finestra su una dimensione "altra": sguardi e riflessi nel Progetto Wuppertal di Lev Kopelev
Creators: name: Peroni, Giulia
Publisher: name: Università degli  Studi di Milano
Year: 2015
Subjects: Lev Kopelev, Wuppertaler Projekt, rapporti Russia-Germania.

description: Lev Kopelev grew up and studied during Stalinism, when a progressive closure towards the West characterized Eastern countries. Nevertheless, thanks to different inputs he received as a young man, he underwent a path of personal growth, which led him to develop a project of dialogue and openness towards the “other”. Surrounded by the cosmopolitan atmosphere of Kiev at the beginning of the XX century, he learned German as child, and kept researching an open dialogue with the German people, which reached his peak in the Eighties, after he was deprived of the Soviet citizenship and became a citizen of the Federal Republic of Germany. Germanist by profession, he dedicated his life to the in depth examination of the links between Russians and Germans towards the centuries, and got to formulate the theory of a spiritual “elective affinity” between the two nations. His research led to a great project: the “Wuppertaler Projekt zur Erforschung der Geschichte Deutsch-Russischer Fremdenbilder”. In this work Kopelev firstly analysed the evolution of the relationship between the two nations from a literary, political, social and cultural point of view, and, secondly, examined the genesis and the development of the prejudices of the Germans towards the Russians and vice versa. The work showed the intrinsic groundlessness of these prejudices and offered the two nations the possibility of observing and understanding a different reality.
description: Altre Modernità, 2015: NUMERO SPECIALE Finestre: sguardi e riflessi, trasparenze e opacità
Classical Integrable N=1 and $N= 2$ Super Sinh-Gordon Models with Jump Defects
Creators: name: Gomes, J. F.
name: Ymai, L. H.
name: Zimerman, A. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The structure of integrable field theories in the presence of jump defects is discussed in terms of boundary functions under the Lagrangian formalism. Explicit examples of bosonic and fermionic theories are considered. In particular, the boundary functions for the N=1 and N=2 super sinh-Gordon models are constructed and shown to generate the Backlund transformations for its soliton solutions. As a new and interesting example, a solution with an incoming boson and an outgoing fermion for the N=1 case is presented. The resulting integrable models are shown to be invariant under supersymmetric transformation.
description: talk presented at the V International Symposium on Quantum Theory and Symmetries, Valladolid, Spain, July 22-28,2007
Performance of a Lattice Quantum Chromodynamics Kernel on the Cell Processor
Creators: name: Spray, J.
name: Hill, J.
name: Trew, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The implementation of a proof-of-concept Lattice Quantum Chromodynamics kernel on the Cell processor is described in detail, illustrating issues encountered in the porting process. The resulting code performs up to 45GFlop/s per socket, indicating that the Cell processor is likely to be a good platform for future Lattice QCD calculations.
description: 7 pages, 2 figures. Submitted to Computer Physics Communications, currently in review
Charged Impurity Scattering in Graphene
Creators: name: Chen, J. H.
name: Jang, C.
name: Fuhrer, M. S.
name: Williams, E. D.
name: Ishigami, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Since the experimental realization of graphene1, extensive theoretical work has focused on short-range disorder2-5, ''ripples''6, 7, or charged impurities2, 3, 8-13 to explain the conductivity as a function of carrier density sigma_(n)[1,14-18], and its minimum value sigma_min near twice the conductance quantum 4e2/h[14, 15, 19, 20]. Here we vary the density of charged impurities nimp on clean graphene21 by deposition of potassium in ultra high vacuum. At non-zero carrier density, charged impurity scattering produces the ubiquitously observed1, 14-18 linear sigma_(n) with the theoretically-predicted magnitude. The predicted asymmetry11 for attractive vs. repulsive scattering of Dirac fermions is observed. Sigma_min occurs not at the carrier density which neutralizes nimp, but rather the carrier density at which the average impurity potential is zero10. Sigma_min decreases initially with nimp, reaching a minimum near 4e2/h at non-zero nimp, indicating that Sigma_min in present experimental samples does not probe Dirac-point physics14, 15, 19, 20 but rather carrier density inhomogeneity due to the impurity potential3, 9, 10.
description: 19 pages, 5 figures, Manuscript and figures completely updated
The future lifespan of Earth's oxygenated Atmosphere
Creators: name: Ozaki, K.
name: Reinhard, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Earth's modern atmosphere is highly oxygenated and is a remotely detectable signal of its surface biosphere. However, the lifespan of oxygen-based biosignatures in Earth's atmosphere remains uncertain, particularly for the distant future. Here we use a combined biogeochemistry and climate model to examine the likely timescale of oxygen-rich atmospheric conditions on Earth. Using a stochastic approach, we find that the mean future lifespan of Earth's atmosphere with oxygen levels more than 1% of the present atmospheric level is 1.08+-0.14 billion years. The model projects that a deoxygenation of the atmosphere, with atmospheric oxygen dropping sharply to levels reminiscnet of the Archaean Earth, will most probably be triggered before the inception of moist greenhouse conditions in Earth's climate system and before the extensive loss of surface water from the atmosphere. We find that future deoxygenation is an inevitable consequence of increasing solar fluxes, whereas its precise timing is modulated by the exchange flux of reducing power between the mantle and the ocean-atmosphere-crust system. Our results suggest that the planetary carbonate-silicate cycle will tend to lead to terminally CO2-limited biospheres and rapid atmospheric deoxygenation, emphasizing the need for robust atmospheric biosignatures applicable to weakly oxygenated and anoxic exoplanet atmospheres and highlighting the potential importance of atmospheric organic haze during the terminal stages of planetary habitability.
description: Manuscript currently in press in Nature Geoscience
PROLONGED INTERVAL BETWEEN TWIN LOSS AND TERM DELIVERY: A RARE CASE REPORT AND REVIEW OF THE LITERATURE
Creators: name: Adaeze, Chinelo Nwankwo
name: Ugochukwu, Emmanuel Okeke
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Delayed Interval Delivery, Twin Gestation, In Vitro Fertilization (IVF), Cervical Stitch, Fetal Prematurity

description: While a number of cases detailing delayed interval birth of the second twin have been published recently, most of the deliveries have been before 34 weeks and rarely beyond 36 weeks. We report a case of delayed interval delivery at term with a favourable outcome. The loss of first twin was at 14 weeks in a dichorionic diamniotic twin gestation in which the placenta was retained. Pregnancy was conceived via In Vitro Fertilization (IVF) cycle. The Triangular 3-Bite Technique cervical stitch application was utilized to secure the cervix after 2 days of use of salbutamol and dydrogesterone as tocolytics with amoxicillian clavulanic acid to prevent intrauterine infection. The woman had a biweekly check of clotting profile and pregnancy was uneventful till term and she was delivered. We noted that delayed interval delivery can be done after the delivery of the first twin with second twin carried to term to avoid challenges of fetal prematurity.
Dynamics of Quantum Noise in a Tunnel Junction under ac Excitation
Creators: name: Gabelli, J.
name: Reulet, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the first measurement of the \emph{dynamical response} of shot noise (measured at frequency $ω$) of a tunnel junction to an ac excitation at frequency $ω_0$. The experiment is performed in the quantum regime, $\hbarω\sim\hbarω_0\gg k_BT$ at very low temperature T=35mK and high frequency $ω_0/2π=6.2$ GHz. We observe that the noise responds in phase with the excitation, but not adiabatically. The results are in very good agreement with a prediction based on a new current-current correlator.
description: Theory removed. More experimental details. One extra figure
A Radiation-Balanced Silica Fiber Amplifier
Creators: name: Knall, Jennifer M.
name: Engholm, Magnus
name: Boilard, Tommy
name: Bernier, Martin
name: Digonnet, Michel J. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We report what we believe to be the first radiation-balanced fiber amplifier - a device that provides optical gain while experiencing no temperature rise. The gain medium is a silica fiber with a 21 um-diameter core highly doped with Yb3+ (2.52 wt.%) and co doped with 2.00 wt.% Al to reduce concentration quenching. The amplifier was core-pumped with 1040 nm light to create anti-Stokes fluorescence (ASF) cooling and gain in the core at 1064 nm. Using a custom slow-light FBG sensor with mK resolution, temperature measurements were performed at multiple locations along the amplifier fiber. A 4.35-m fiber pumped with 2.62 W produced 17 dB of gain while the average fiber temperature remained slightly below room temperature. This advancement is a fundamental step toward the creation of ultra-stable lasers necessary to many applications, especially low-noise sensing and high-precision metrology.
description: 8 pages including the supplementary material (SM). 5 figures in the main text, 2 in the SM
Jets in Magnetically Arrested Hot Accretion Flows: Geometry, Power and Black Hole Spindown
Creators: name: Narayan, Ramesh
name: Chael, Andrew
name: Chatterjee, Koushik
name: Ricarte, Angelo
name: Curd, Brandon
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results of nine simulations of radiatively-inefficient magnetically arrested disks (MADs) across different values of the black hole spin parameter $a_*$: $-0.9$, $-0.7$, $-0.5$, $-0.3$, 0, 0.3, 0.5, 0.7, and 0.9. Each simulation was run up to $t \gtrsim 100,000\,GM/c^3$ to ensure disk inflow equilibrium out to large radii. We find that the saturated magnetic flux level, and consequently also jet power, of MAD disks depends strongly on the black hole spin, confirming previous results. Prograde disks saturate at a much higher relative magnetic flux and have more powerful jets than their retrograde counterparts. MADs with spinning black holes naturally launch jets with generalized parabolic profiles whose widths vary as a power of distance from the black hole. For distances up to $100\;GM/c^2$, the power-law index is $k \approx 0.27-0.42$. There is a strong correlation between the disk-jet geometry and the dimensionless magnetic flux, resulting in prograde systems displaying thinner equatorial accretion flows near the black hole and wider jets, compared to retrograde systems. Prograde and retrograde MADs also exhibit different trends in disk variability: accretion rate variability increases with increasing spin for $a_*>0$ and remains almost constant for $a_*\lesssim 0$, while magnetic flux variability shows the opposite trend. Jets in the MAD state remove more angular momentum from black holes than is accreted, effectively spinning down the black hole. If powerful jets from MAD systems in Nature are persistent, this loss of angular momentum will notably reduce the black hole spin over cosmic time.
description: Accepted by MNRAS 2022 January 26. Received 2022 January 26; in original form 2021 August 27
Low temperature behavior of krypton monolayers on graphite
Creators: name: Shrimpton, Neil Douglas
Publisher: name: University of British Columbia
Year: 2010

description: The low temperature behaviour of a system of incommensurate krypton monolayers on graphite was analysed. The free energy was calculated for a variety of monolayer configurations and the misfit and orientation of the minimum energy configuration determined as a function of the temperature and chemical potential of the system. The free energy did not vary significantly over the temperature range from 0 K to 4 K. The zero point energy contributes significantly to the free energy and could not be neglected. The lowest energy vibrational modes were determined; these modes correspond to motion of the domain walls. For configurations with clearly separated domain walls the vibrational modes separated into groups of three (triads). In the lowest energy triad, the lowest energy mode was a compressional mode. The second and third lowest modes were shearing modes. These three modes describe the fundamental forms of domain wall motion. The modes of the higher energy triads are more energetic forms of the lowest energy triad.
Comparing merging behaviors observed in naturalistic data with behaviors generated by a machine learned model
Creators: name: Srinivasan, Aravinda Ramakrishnan
name: Hasan, Mohamed
name: Lin, Yi-Shin
name: Leonetti, Matteo
name: Billington, Jac
name: Romano, Richard
name: Markkula, Gustav
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: There is quickly growing literature on machine-learned models that predict human driving trajectories in road traffic. These models focus their learning on low-dimensional error metrics, for example average distance between model-generated and observed trajectories. Such metrics permit relative comparison of models, but do not provide clearly interpretable information on how close to human behavior the models actually come, for example in terms of higher-level behavior phenomena that are known to be present in human driving. We study highway driving as an example scenario, and introduce metrics to quantitatively demonstrate the presence, in a naturalistic dataset, of two familiar behavioral phenomena: (1) The kinematics-dependent contest, between on-highway and on-ramp vehicles, of who passes the merging point first. (2) Courtesy lane changes away from the outermost lane, to leave space for a merging vehicle. Applying the exact same metrics to the output of a state-of-the-art machine-learned model, we show that the model is capable of reproducing the former phenomenon, but not the latter. We argue that this type of behavioral analysis provides information that is not available from conventional model-fitting metrics, and that it may be useful to analyze (and possibly fit) models also based on these types of behavioral criteria.
description: This paper has been submitted to 24th IEEE International Conference on Intelligent Transportation - ITSC2021, September 19-22, 2021 Indianapolis, IN, United States
Search for $B \to π\ell^+\ell^-$ Decays at Belle
Creators: name: Wei, J. -T.
name: Chen, K. -F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a search for the B-> pi e^+ e^- and B-> pi μ^+ μ^- decays, with a data sample of 657 million BBbar pairs collected with the Belle detector at the KEKB $e^+e^-$ collider. Signal events are reconstructed from a charged or a neutral pion candidate and a pair of oppositely charged electrons or muons. No significant signal is observed and we set the upper limit on the isospin-averaged branching fraction BF(B -> π\ell^+\ell^-) < 6.2x10^-8 at the 90% confidence level.
description: 8 pages, 3 figures, accepted by PRD(RC)
Quantifying the spin mixing conductance of EuO/W heterostructures by spin Hall magnetoresistance experiments
Creators: name: Rosenberger, Paul
name: Opel, Matthias
name: Geprägs, Stephan
name: Huebl, Hans
name: Gross, Rudolf
name: Müller, Martina
name: Althammer, Matthias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The spin Hall magnetoresistance (SMR) allows to investigate the magnetic textures of magnetically ordered insulators in heterostructures with normal metals by magnetotransport experiments. We here report the observation of the SMR in in-situ prepared ferromagnetic EuO/W thin film bilayers with magnetically and chemically well-defined interfaces. We characterize the magnetoresistance effects utilizing angle-dependent and field-dependent magnetotransport measurements as a function of temperature. Applying the established SMR model, we derive and quantify the real and imaginary parts of the complex spin mixing interface conductance. We find that the imaginary part is by one order of magnitude larger than the real part. Both decrease with increasing temperature. This reduction is in agreement with thermal fluctuations in the ferromagnet.
description: 5 pages, 4 figures
Additional file 2 of Comprehensive insight into endothelial progenitor cell-derived extracellular vesicles as a promising candidate for disease treatment
Creators: name: Chen, Ke
name: Li, Yang
name: Xu, Luwei
name: Qian, Yiguan
name: Liu, Ning
name: Zhou, Changcheng
name: Liu, Jingyu
name: Zhou, Liuhua
name: Xu, Zheng
name: Jia, Ruipeng
name: Ge, Yu-Zheng
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: Additional file2: Table S2. The beneficial effects of ADSC- and BMSC-EVs on various diseases.
Multi-field Mimetic Gravity
Creators: name: Mansoori, Seyed Ali Hosseini
name: Talebian, Alireza
name: Molaee, Zahra
name: Firouzjahi, Hassan
Publisher: name: arXiv
Year: 2021
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: In this paper, we extend the mimetic gravity to the multi-field setup with a curved field space manifold. The multi-field mimetic scenario is realized via the singular limit of the conformal transformation between the auxiliary and the physical metrics. We look for the cosmological implications of the setup where it is shown that at the background level the mimetic energy density mimics the roles of dark matter. At the perturbation level, the scalar field perturbations are decomposed into the tangential and normal components with respect to the background field space trajectory. The adiabatic perturbation tangential to the background trajectory is frozen while the entropy mode perpendicular to the background trajectory propagates with the speed of unity. Whether or not the entropy perturbation is healthy directly depends on the signature of the field-space metric. We perform the full non-linear Hamiltonian analysis of the system with the curved field space manifold and calculate the physical degrees of freedom verifying that the system is free from the Ostrogradsky-type ghost.
description: 23 pages, 11 figures, matches published version
Magneto optical trapping of Barium
Creators: name: De, S.
name: Dammalapati, U.
name: Jungmann, K.
name: Willmann, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: First laser cooling and trapping of the heavy alkaline earth element barium has been achieved based on the strong 6s$^2$ $^1$S$_0$ - 6s6p $^1$P$_1$ transition for the main cooling. Due to the large branching into metastable D-states several additional laser driven transitions are required to provide a closed cooling cycle. A total efficiency of $0.4(1) \cdot 10^{-2}$ for slowing a thermal atomic beam and capturing atoms into a magneto optical trap was obtained. Trapping lifetimes of more than 1.5 s were observed. This lifetime is shortened at high laser intensities by photo ionization losses. The developed techniques will allow to extend significantly the number of elements that can be optically cooled and trapped.
description: 4 pages, 5 figures
Ages of Elliptical Galaxies: Single versus Multi Population Interpretation
Creators: name: Idiart, T. P.
name: Silk, J.
name: Pacheco, J. A. de Freitas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: New calibrations of spectrophotometric indices of elliptical galaxies as functions of spectrophotometric indices are presented, permitting estimates of mean stellar population ages and metallicities. These calibrations are based on evolutionary models including a two-phase interstellar medium, infall and a galactic wind.Free parameters were fixed by requiring that models reproduce the mean trend of data in the color-magnitude diagram as well as in the plane of indices Hbeta-Mg2 and Mg2-. To improve the location of faint ellipticals(MB > -20) in the Hbeta-Mg2 diagram, down-sizing was introduced. An application of our calibrations to a sample of ellipticals and a comparison with results derived from single stellar population models is given. Our models indicate that mean population ages span an interval of 7-12 Gyr and are correlated with metallicities, which range from approximately half up to three times solar.
description: 10 pages and 6 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal
Post retention strength of apical and conventional coating obturation methods using bioceramic sealer: a laboratory investigation
Creators: name: Chanapairin, B
name: Kulvitit, S
name: Sathorn, C
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 3203
subject: Dentistry
subject: FOS: Clinical medicine

description: Background: Once bioceramic sealer (BCS) enters the dentinal tubules, it cannot be reliably removed. BCS-occupied dentinal tubules reduce fibre post retention strength. Coating gutta-percha with BCS only on the apical portion may improve post retention strength due to increased retention strength between the dentin and resin cement interface. The aim of the study was to test this hypothesis. Methods: Root canals of 27 extracted human mandibular premolars were instrumented and randomly assigned to three obturation methods: conventional coating (CC), non-coating (NC), and apical coating (AC). The root canals were obturated with gutta-percha to 4 mm from the working length under an operating microscope. After the BCS was completely set, post spaces were prepared, and quartz fibre posts were cemented. The apical 4.5 mm of the roots were removed. Two samples were prepared at the apical, middle, and coronal root levels (one for scanning electron microscope (SEM) study and another for the push out bond strength (PBS) test). After the PBS test, the samples were examined with a stereo microscope to determine the failure mode: dentine-cement (DC), post-cement (PC) and mixed. The PBS data were analysed by One way ANOVA for the specific obturation method effects. Repeated ANOVA was used for the specific effects of the root levels on PBS in different obturation methods. Results: At all three root levels, more continuous hybrid layers and denser resin tags were found in the NC and AC than the CC group. The AC and NC groups’ PBS was significantly higher than the CC group at the apical 1/3 (p = 0.002 and p = 0.001) and coronal 1/3 (p = 0.016 and p = 0.041). The PBS in the CC group at the middle 1/3 was significantly higher than the apical 1/3 (p = 0.022). DC failure mode was most commonly found in the CC group, while PC failure mode was found most frequently in the NC and AC groups. Conclusions: The apical coating obturation method significantly increased PBS over the conventional coating method, potentially reducing fiber post dislodgement. However, this study was only preliminary. Clinical studies are required to confirm the results.
A Gaussian Process Regression Reveals No Evidence for Planets Orbiting Kapteyn's Star
Creators: name: Bortle, Anna
name: Fausey, Hallie
name: Ji, Jinbiao
name: Dodson-Robinson, Sarah
name: Delgado, Victor Ramirez
name: Gizis, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Radial-velocity (RV) planet searches are often polluted by signals caused by gas motion at the star's surface. Stellar activity can mimic or mask changes in the RVs caused by orbiting planets, resulting in false positives or missed detections. Here we use Gaussian process (GP) regression to disentangle the contradictory reports of planets vs. rotation artifacts in Kapteyn's star (Anglada-Escude et al. 2014, Robertson et al. 2015, Anglada-Escude et al. 2016). To model rotation, we use joint quasi-periodic kernels for the RV and H-alpha signals, requiring that their periods and correlation timescales be the same. We find that the rotation period of Kapteyn's star is 125 days, while the characteristic active-region lifetime is 694 days. Adding a planet to the RV model produces a best-fit orbital period of 100~years, or 10 times the observing time baseline, indicating that the observed RVs are best explained by star rotation only. We also find no significant periodic signals in residual RV data sets constructed by subtracting off realizations of the best-fit rotation model and conclude that both previously reported "planets" are artifacts of the star's rotation and activity. Our results highlight the pitfalls of using sinusoids to model quasi-periodic rotation signals.
description: 15 pages, including 10 figures. Accepted for publication in Astronomical Journal
Conjugacy Classes of Centralizers in $G_2$
Creators: name: Singh, Anupam
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20G20

description: Let $G$ be an algebraic group of type $G_2$ over a field $k$ of characteristic $\neq 2,3$. In this paper we calculate centralizers of semisimple elements in anisotropic $G_2$. Using these, we show explicitly that there are six conjugacy classes of centralizers in the compact real form of $G_2$.
description: 10 pages