cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Perturbations and stability conditions of k-essence and kinetic gravity braiding models in two-field measure theory
Creators: name: Cordero, Ruben
name: De-Santiago, Josue
name: Miranda, Omar G.
name: Serrano-Crivelli, Margarita
Publisher: name: arXiv
Year: 2022
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: We study cosmological perturbations for k-essence and kinetic gravity braiding models in the context of the two-field measure theory (TMT). Considering scalar perturbations and the uniform field gauge, we obtain the sound speed of the fields and present a stability analysis by means of the kinetic matrix and the mass eigenvalues. For k-essence models, in the two-field measure theory, the speed of propagation of the field is modified completely due to the new measure field and it gives rise to crucial differences with respect to the case without new measure. The stability analysis gives a physical viable model for the Universe. For the kinetic gravity braiding models in the two-field measure theory we get that, in general, the speed of perturbations is equal to the speed of light which is a consequence of the properties of the new measure field. In the later case, there is always a ghost field. Furthermore, we calculate general expressions for the mass eigenvalues and find, for an explicit example, the existence of tachyonic instabilities.
description: 16 pages, 2 figures
Lower critical field and SNS-Andreev spectroscopy of 122-arsenides: Evidence of nodeless superconducting gap
Creators: name: Abdel-Hafiez, M.
name: Pereira, P. J.
name: Kuzmichev, S. A.
name: Kuzmicheva, T. E.
name: Pudalov, V. M.
name: Harnagea, L.
name: Kordyuk, A. A.
name: Silhanek, A. V.
name: Moshchalkov, V. V.
name: Shen, B.
name: Wen, Hai-Hu
name: Vasiliev, A. N.
name: Chen, Xiao-Jia
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using two experimental techniques, we studied single crystals of the 122-FeAs family with almost the same critical temperature, Tc. We investigated the temperature dependence of the lower critical field of a single crystal under static magnetic fields parallel to the axis. The temperature dependence of the London penetration depth can be described equally well either by a single anisotropic -wave-like gap or by a two-gap model, while a d-wave approach cannot be used to fit the London penetration depth data. Intrinsic multiple Andreev reflection effect spectroscopy was used to detect bulk gap values in single crystals of the intimate compound, with the same Tc. We estimated the range of the large gap value 6-8 meV (depending on small variation of and its a space anisotropy of about 30%, and the small gap 1.7 meV. This clearly indicates that the gap structure of our investigated systems more likely corresponds to a nodeless s-wave two gaps.
description: 9 pages, 6 figures
Epidemic spreading driven by biased random walks
Creators: name: Pu, Cunlai
name: Li, Siyuan
name: Yang, Jian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Random walk is one of the basic mechanisms found in many network applications. We study the epidemic spreading dynamics driven by biased random walks on complex networks. In our epidemic model, each time infected nodes constantly spread some infected packets by biased random walks to their neighbor nodes causing the infection of the susceptible nodes that receive the packets. An infected node get recovered from infection with a fixed probability. Simulation and analytical results on model and real-world networks show that the epidemic spreading becomes intense and wide with the increase of delivery capacity of infected nodes, average node degree, homogeneity of node degree distribution. Furthermore, there are corresponding optimal parameters such that the infected nodes have instantaneously the largest population, and the epidemic spreading process covers the largest part of a network.
description: 9 figures
Zn(II) phthalocyanine-cyclotriphosphazene dyad: synthesis, characterization, photophysical, and photochemical properties
Creators: name: Harmandar, Kevser
name: Küçük, Tuğba
name: Atilla, Devrim
name: İbişoğlu, Hanife
name: Şenkuytu, Elif
name: Ün, Şule Şahin
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Plant Biology

description: A novel asymmetric Zn (II) phthalocyanine (Pcs) (5) peripherally substituted with one cyclotriphosphazene ring and six tert-butylphenoxy groups was synthesized and fully characterized by elemental analysis, mass, 1H, 13C, 31P NMR, and FT-IR spectroscopies. Photophysical and photochemical properties of 5 (ground state absorption, fluorescence emission, fluorescence lifetime, fluorescence quantum yield, and singlet oxygen generation) were investigated in DMSO and THF. The determined singlet oxygen quantum yields of compound 5 in DMSO and THF were 0.62 and 0.52, respectively. These singlet oxygen quantum yields are very near the singlet oxygen quantum yield of unsubstituted Zn(II) Pcs used as the reference compound. This new Zn(II) Pcs may be a promising candidate for photodynamic therapy (PDT) with its photophysical and photochemical properties.
Origin of exchange bias in [Co/Pt]ML/Fe multilayer with orthogonal magnetic anisotropies
Creators: name: Singh, Sadhana
name: Khanderao, Avinash G.
name: Gupta, Mukul
name: Sergeev, Ilya
name: Wille, H. C.
name: Schlage, Kai
name: Herlitschke, Marcus
name: Kumar, Dileep
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetization reversal of soft ferromagnetic Fe layer, coupled to [Co/Pt]ML multilayer [ML] with perpendicular magnetic anisotropy (PMA), has been studied in-situ with an aim to understand the origin of exchange bias (EB) in orthogonal magnetic anisotropic systems. The interface remanant state of the ML is modified by magnetic field annealing, and the effect of the same on the soft Fe layer is monitored using the in-situ magneto-optical Kerr effect (MOKE). A considerable shift in the Fe layer hysteresis loop from the centre and an unusual increase in the coercivity, similar to exchange bias phenomena, is attributed to the exchange coupling at the [Co/Pt]ML and Fe interface. The effect of the coupling on spin orientation at the interface is further explored precisely by performing an isotope selective grazing incident nuclear resonance scattering (GINRS) technique. Here, the interface selectivity is achieved by introducing a 2 nm thick Fe57 marker between [Co/Pt]ML and Fe layers. Interface sensitivity is further enhanced by performing measurements under the x-ray standing wave conditions. The combined MOKE and GINRS analysis revealed the unidirectional pinning of the Fe layer due to the net in-plane magnetic spin at the interface caused by magnetic field annealing. Unidirectional exchange coupling or pinning at the interface, which may be due to the formation of asymmetrical closure domains, is found responsible for the origin of EB with an unusual increase in coercivity.
description: 9 figures, 1 table
Experimental demonstration of longitudinal beam phase space linearizer in a free-electron laser facility by corrugated structures
Creators: name: Deng, Haixiao
name: Zhang, Meng
name: Feng, Chao
name: Zhang, Tong
name: Wang, Xingtao
name: Lan, Taihe
name: Feng, Lie
name: Zhang, Wenyan
name: Liu, Xiaoqing
name: Yao, Haifeng
name: Shen, Lei
name: Li, Bin
name: Zhang, Junqiang
name: Li, Xuan
name: Fang, Wencheng
name: Wang, Dan
name: Couprie, Marie-emmanuelle
name: Lin, Guoqiang
name: Liu, Bo
name: Gu, Qiang
name: Wang, Dong
name: Zhao, Zhentang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Removal of residual linear energy chirp and intrinsic nonlinear energy curvature in the relativistic electron beam from radiofrequency linear accelerator is of paramount importance for efficient lasing of a high-gain free-electron laser. Recently, it was theoretically and experimentally demonstrated that the longitudinal wakefield excited by the electrons itself in the corrugated structure allows for precise control of the electron beam phase space. In this Letter, we report the first utilization of a corrugated structure as beam linearizer in the operation of a seeded free-electron laser driven by a 140 MeV linear accelerator, where a gain of ~10,000 over spontaneous emission was achieved at the second harmonic of the 1047 nm seed laser, and a free-electron laser bandwidth narrowing by about 50% was observed, in good agreement with the theoretical expectations.
description: 6 pages, 5 figures
Off-diagonal bounds for the Dirichlet-to-Neumann operator
Creators: name: Bechtel, Sebastian
name: Ouhabaz, E. -M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Let $Ω$ be a bounded domain of $\mathbb{R}^{n+1}$ with $n \ge 1$. We assume that the boundary $Γ$ of $Ω$ is Lipschitz. Consider the Dirichlet-to-Neumann operator $N_0$ associated with a system in divergence form of size $m$ with real symmetric and H\''older continuous coefficients. We prove $L^p(Γ)\to L^q(Γ)$ off-diagonal bounds of the form$$ \| 1_F e^{-t N_0} 1_E f \|_q \lesssim (t \wedge 1)^{\frac{n}{q}-\frac{n}{p}} \left( 1 + \frac{dist(E,F)}{t} \right)^{-1} \| 1_E f \|_p$$for all measurable subsets $E$ and $F$ of $Γ$. If $Γ$ is $C^{1+ κ}$ for some $κ> 0$ and $m=1$, we obtain a sharp estimate in the sense that $ \left( 1 + \frac{dist(E,F)}{t} \right)^{-1}$ can be replaced by$ \left( 1 + \frac{dist(E,F)}{t} \right)^{-(1 + \frac{n}{p} - \frac{n}{q})}$. Such bounds are also valid for complex time. For $n=1$, we apply our off-diagonal bounds to prove that the Dirichlet-to-Neumann operator associated with a system generates an analytic semigroup on $L^p(Γ)$ for all $p \in (1, \infty)$. In addition, the corresponding evolution problem has $L^q(L^p)$-maximal regularity.
description: final version, to appear in J. Math. Anal. Appl
SFA & IRD - 40 years of research partnerships
Creators: name: Lebranchu, Julien
name: Violette, Clémentine
name: Dagorn, Laurent
name: Guillotreau, Patrice
Publisher: name: Zenodo
Year: 2024

description: This poster presents some of the projects carried out as part of the partnerships between the IRD and the SFA.

It was presented at the SFA's 40th anniversary exhibition in Victoria, Seychelles.
On finite generation of self-similar groups of finite type
Creators: name: Bondarenko, Ievgen V.
name: Samoilovych, Igor O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20F05, 20E08

description: A self-similar group of finite type is the profinite group of all automorphisms of a regular rooted tree that locally around every vertex act as elements of a given finite group of allowed actions. We provide criteria for determining when a self-similar group of finite type is finite, level-transitive, or topologically finitely generated. Using these criteria and GAP computations we show that for the binary alphabet there is no infinite topologically finitely generated self-similar group given by patterns of depth $3$, and there are $32$ such groups for depth $4$.
description: 11 pages
Tri-photon at muon collider: a new process to probe the anomalous quartic gauge couplings
Creators: name: Yang, Ji-Chong
name: Qing, Zhi-Bin
name: Han, Xue-Ying
name: Guo, Yu-Chen
name: Li, Tong
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The muon collider has recently received a great deal of attention because of its ability to achieve both high energy and high luminosity. It plays as a gauge boson collider because the vector boson scattering (VBS) becomes the dominant production topology for Standard Model processes starting from a few TeV of collision energy. In this paper, we propose that the process of $μ^+μ^-$ annihilation into tri-photon is also very sensitive to the search of anomalous quartic gauge couplings (aQGCs). We investigate the projected constraints on the transverse operators contributing to aQGCs through $μ^+μ^-\to Z^\ast/γ^\ast\to γγγ$ at muon colliders. For the muon collider with $\sqrt{s}=3$ TeV and $\mathcal{L}=1\;{\rm ab}^{-1}$, the expected constraints are about two orders of magnitude stronger than those at the 13 TeV LHC.
description: 19 pages, 6 figures,6 tables; References have been updated in the replacement
Continuous Symmetry Breaking in a Two-dimensional Rydberg Array
Creators: name: Chen, Cheng
name: Bornet, Guillaume
name: Bintz, Marcus
name: Emperauger, Gabriel
name: Leclerc, Lucas
name: Liu, Vincent S.
name: Scholl, Pascal
name: Barredo, Daniel
name: Hauschild, Johannes
name: Chatterjee, Shubhayu
name: Schuler, Michael
name: Laeuchli, Andreas M.
name: Zaletel, Michael P.
name: Lahaye, Thierry
name: Yao, Norman Y.
name: Browaeys, Antoine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spontaneous symmetry breaking underlies much of our classification of phases of matter and their associated transitions. The nature of the underlying symmetry being broken determines many of the qualitative properties of the phase; this is illustrated by the case of discrete versus continuous symmetry breaking. Indeed, in contrast to the discrete case, the breaking of a continuous symmetry leads to the emergence of gapless Goldstone modes controlling, for instance, the thermodynamic stability of the ordered phase. Here, we realize a two-dimensional dipolar XY model -- which exhibits a continuous spin-rotational symmetry -- utilizing a programmable Rydberg quantum simulator. We demonstrate the adiabatic preparation of correlated low-temperature states of both the XY ferromagnet and the XY antiferromagnet. In the ferromagnetic case, we characterize the presence of long-range XY order, a feature prohibited in the absence of long-range dipolar interaction. Our exploration of the many-body physics of XY interactions complements recent works utilizing the Rydberg-blockade mechanism to realize Ising-type interactions exhibiting discrete spin rotation symmetry.
description: 18 pages, 3 figures in main text, 9 figures in supplemental methods
DSC_0125.JPG Redesigning the Affordable Inputs Program to Diversify and Sustain Growth
Creators: name: Nyondo, Christone
name: Burke, William J.
name: Muyanga, Milu
name: Chadza, William
name: Nyondo, Christone
name: Burke, William J.
name: Muyanga, Milu
name: Chadza, William
Publisher: name: Unknown
Year: 2022
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: International Development
subject: Productivity Analysis
subject: input subsidy
subject: policy reform
subject: crop diversity
subject: yield response
subject: smallholder
subject: Malawi

description: • Malawi has been implementing a large input subsidy program since the 2004/5 season to improve access to agricultural inputs by smallholder farmers. • Recently, there has been recognition within government that significant reforms are needed. • These calls for policy shift are consistent with existing evidence that suggests that the benefits from subsidy programs have been considerably smaller than anticipated due to low crop response to fertilizer and other challenges. • These calls present an opportunity for innovative policies to decisively address the existing pitfalls and devise ways for greater and more efficient use of resources. • Malawi could consider implementing a streamlined, smarter subsidy program and/or venturing into other forms of subsidies tailored to different farmer and ecological needs (e.g., subsidizing legume seeds, agriculture lime, etc.). • Government could also consider going beyond subsiding inputs to promoting interventions that holistically addresses soil health and land conservation challenges faced by the nationʼs farmers. • Malawi could adopt policies other than subsidies, such as strengthening agricultural Research, Development and Extension to improve productivity of land, labor and other inputs. • Bidirectional learning between extension workers and farmers, improving public infrastructure, increasing access to education and land tenure rights, creating an enabling policy environment, and promoting dietary and production diversity will all be critical for the country.
Measuring the anomalous quartic gauge couplings in the $W^+W^-\to W^+W^-$ process at muon collider using artificial neural networks
Creators: name: Yang, Ji-Chong
name: Han, Xue-Ying
name: Qin, Zhi-Bin
name: Li, Tong
name: Guo, Yu-Chen
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The muon collider provides a unique opportunity to study the vector boson scattering processes and dimension-8 operators contributing to anomalous quartic gauge couplings~(aQGCs). Because of the cleaner final state, it is easier to decode subprocess and certain operator couplings at a muon collider. We attempt to identify the anomalous $WWWW$ coupling in the exclusive $WW\to WW$ scattering in this paper. Since one aQGC can be induced by multiple dimension-8 operators, the study of one coupling can help to confine different operators. Meanwhile, singling out the $WW\to WW$ process can help to study the unitarity bounds. The vector boson scattering process corresponding to the anomalous $WWWW$ coupling is $μ^+μ^-\to νν\barν\barν\ell^+\ell^-$, with four (anti-)neutrinos in the final state, which brings troubles in phenomenological studies. In this paper, the machine learning method is used to tackle this problem. We find that, using the artificial neural network can extract the $W^+W^-\to W^+W^-$ contribution, and is helpful to reconstruct the center of mass energy of the subprocess which is important in the study of the Standard Model effective field theory. The sensitivities and the expected constraints on the dimension-8 operators at the muon collider with $\sqrt{s}=30$ TeV are presented. We demonstrate that the artificial neural networks exhibit great potential in the phenomenological study of processes with multiple neutrinos in the final state.
description: 33 pages, 11 figures, 8 tables; References have been updated in the replacement
ZFOURGE/CANDELS: On the Evolution of M* Galaxy Progenitors from z=3 to 0.5
Creators: name: Papovich, Casey
name: Labbé, I.
name: Quadri, R.
name: Tilvi, V.
name: Behroozi, P.
name: Bell, E. F.
name: Glazebrook, K.
name: Spitler, L.
name: Straatman, C. M. S.
name: Tran, K. -V.
name: Cowley, M.
name: Davé, R.
name: Dekel, A.
name: Dickinson, M.
name: Ferguson, H.
name: Finkelstein, S. L.
name: Gawiser, E.
name: Inami, H.
name: Faber, S. M.
name: Kacprzak, G. G.
name: Kawinwanchakij, L.
name: Kocevski, D.
name: Koekemoer, A.
name: Koo, D. C.
name: Kurczynski, P.
name: Lotz, J. M.
name: Lu, Y.
name: Lucas, R. A.
name: McIntosh, D.
name: Mehrtens, N.
name: Mobasher, B.
name: Monson, A.
name: Morrison, G.
name: Nanayakkara, T.
name: Perrson, S. E.
name: Salmon, B.
name: Simons, R.
name: Tomczak, A.
name: van Dokkum, P.
name: Weiner, B.
name: Willner, S. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galaxies with stellar masses near M* contain the majority of stellar mass in the universe, and are therefore of special interest in the study of galaxy evolution. The Milky Way (MW) and Andromeda (M31) have present day stellar masses near M*, at 5x10^10 Msol (MW-mass) and 10^11 Msol (M31-mass). We study the typical progenitors of these galaxies using ZFOURGE, a deep medium-band near-IR imaging survey, which is sensitive to the progenitors of these galaxies out to z~3. We use abundance-matching techniques to identify the main progenitors of these galaxies at higher redshifts. We measure the evolution in the stellar mass, rest-frame colors, morphologies, far-IR luminosities, and star-formation rates combining our deep multiwavelength imaging with near-IR HST imaging from CANDELS, and far-IR imaging from GOODS-H and CANDELS-H. The typical MW-mass and M31-mass progenitors passed through the same evolution stages, evolving from blue, star-forming disk galaxies at the earliest stages, to redder dust-obscured IR-luminous galaxies in intermediate stages, and to red, more quiescent galaxies at their latest stages. The progenitors of the MW-mass galaxies reached each evolutionary stage at later times (lower redshifts) and with stellar masses that are a factor of 2-3 lower than the progenitors of the M31-mass galaxies. The process driving this evolution, including the suppression of star-formation in present-day M* galaxies requires an evolving stellar-mass/halo-mass ratio and/or evolving halo-mass threshold for quiescent galaxies. The effective size and star-formation rates imply that the baryonic cold-gas fractions drop as galaxies evolve from high redshift to z~0 and are strongly anticorrelated with an increase in the Sérsic index. Therefore, the growth of galaxy bulges in M* galaxies corresponds to a rapid decline in the galaxy gas fractions and/or a decrease in the star-formation efficiency.
description: Accepted for publication in ApJ; 25 pages, emulateapj format
Synthesis, characterization, and spectroscopic properties of the new type of aminoquinoline-modified cyclotriphosphazenes
Creators: name: Palabıyık, Duygu
name: Balcı, Ceylan Mutlu
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 60506 Virology
subject: FOS: Biological sciences

description: The aminolysis reactions of hexachlorocyclotriphosphazene, [N3P3Cl6] (1a) and dispiro-2,2′-biphenoxydichlorocyclotriphosphazene [N3P3Cl2[(2,2′-biphenoxy)2] (1b) with 6-aminoquinoline (2) were carried out to examine the spectroscopic properties of cyclotriphosphazene derivatives combined with 6-aminoquinoline. For the first time, two new aminoquinoline-substituted cyclotriphosphazene derivatives (3a, b) were obtained in this study. Both compounds (3a, b) have been characterized by elemental analysis, FT-IR analysis, MALDI-TOF mass spectrometry, 13C, 1H, and 31P NMR spectroscopies. The molecular structure of 3b has been confirmed by single crystal X-Ray crystallography. The crystal structure of 3b was investigated in detail to determine the remarkable intermolecular interactions. Furthermore, the photophysical properties of compounds 3a and 3b were determined by using UV/vis and fluorescence spectroscopies.
Neutron diffraction of hydrogenous materials: measuring incoherent and coherent intensities separately from liquid water - a 40-year-old puzzle solved
Creators: name: Temleitner, László
name: Stunault, Anne
name: Cuello, Gabriel
name: Pusztai, László
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: (short version) Accurate determination of the coherent static structure factor of disordered materials containing proton nuclei is prohibitively difficult by neutron diffraction, due to the large incoherent cross section of $^1$H. This notorious problem has set severe obstacles to the structure determination of hydrogenous materials up to now, via introducing large uncertainties into neutron diffraction data processing. Here we present the first accurate separate measurements, using polarized neutron diffraction, of the coherent and incoherent contributions to the total static structure factor of 5 mixtures of light and heavy water, over an unprecedentedly wide momentum transfer range. The structure factors of H$_2$O and D$_2$O mixtures derived in this work may signify the beginning of a new era in the structure determination of hydrogenous materials, using neutron diffraction.
description: 8 pages
A Medical Mobile Clinic for Underserved Communities in the Philippines
Creators: name: Tang, Hilary S
name: Gallo, Arthur
name: Zamignani, Nicole
name: Sales, Chloe
name: Kolluru, Sowmya
name: Kolluru, Srikar
name: Tran, Ava
name: Gabiola, Julieta
Publisher: name: Stanford Digital Repository
Year: 2023
Subjects: Stanford Medicine Center for Asian Health Research and Education
Stanford University School of Medicine
Stanford Department of Medicine
Division of Primary Care and Population Health
global health
Philippines
mobile clinic
health technology
noncommunicable diseases
underserved

description: In 2017, ABC’s for Global Health (ABCGH) successfully launched our Mobile Clinic, serving 16 medically underserved communities. ABCGH addresses the prevention, maintenance, and improvement of noncommunicable diseases which disproportionately affects those lacking medical access, health education, and financial resources through a multi-program approach. Hypertension and diabetes remain the highest risk factors amongst Filipinos causing further disease complications and mortality. ABCGH has established partnerships with government and non-governmental organizations and identified 18 communities, including 3 indigenous peoples and 1 jail. Clinics run monthly per location, establishing reliable, longitudinal primary care.
Appraising emotiveness in translations of key political speeches amid the Tunisian Revolution
Creators: name: , Achraf
Publisher: name: Zenodo
Year: 2011

description: The main issue the study is to assess the ST-TT analysis strategies employed by the
 translator to convey the specific meanings of the STs into the TTs. The aim of this study is
 to investigate the competences needed for future translators and trainees, this investigation
 shall take House’s Translation Quality Assessment (TQA) model as a springboard of
 argumentation and analyses which shall be implemented by translators working on
 political speeches. The area under discussion of this dissertation is translation of political
 discourse from the perspective of translation quality assessment focusing on the strategies
 employed by the translator to convey emotive meanings of the source texts. Notably, this
 dissertation scrutinizes the translation of a particular type of political discourse which is
 inner-state political speeches, specifically, delivered political speeches by President Ben
 Ali in Tunisia before being overthrown.
Negative cavity photon spectral function in an optomechanical system with two parametrically-driven mechanical modes
Creators: name: Motazedifard, Ali
name: Dalafi, A.
name: Naderi, M. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an experimentally feasible optomechanical scheme to realize a negative cavity photon spectral function (CPSF) which is equivalent to a negative absorption. The system under consideration is an optomechanical system consisting of two mechanical (phononic) modes which are linearly coupled to a common cavity mode via the radiation pressure while parametrically driven through the coherent time-modulation of their spring coefficients. Using the equations of motion for the cavity retarded Green's function obtained in the framework of the generalized linear response theory, we show that in the red-detuned and weak-coupling regimes a frequency-dependent effective cavity damping rate (ECDR) corresponding to a negative CPSF can be realized by controlling the cooperativities and modulation parameters while the system still remains in the stable regime. Nevertheless, such a negativity which acts as an optomechanical gain never occurs in a standard (an unmodulated bare) cavity optomechanical system. Besides, we find that the presence of two modulated mechanical degrees of freedom provides more controllability over the magnitude and bandwidth of the negativity of CPSF, in comparison to the setup with a single modulated mechanical oscillator. Interestingly, the introduced negativity may open a new platform to realize an extraordinary (modified) optomechanically induced transparency (in which the input signal is amplified in the output) leading to a perfect tunable optomechanical filter with switchable bandwidth which can be used as an optical transistor.
Bell-state measurement exceeding 50% success probability with linear optics
Creators: name: Bayerbach, Matthias J.
name: D'Aurelio, Simone E.
name: van Loock, Peter
name: Barz, Stefanie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bell-state projections serve as a fundamental basis for most quantum communication and computing protocols today. However, with current Bell-state measurement schemes based on linear optics, only two of four Bell states can be identified, which means that the maximum success probability of this vital step cannot exceed $50\%$. Here, we experimentally demonstrate a scheme that amends the original measurement with additional modes in the form of ancillary photons, which leads to a more complex measurement pattern, and ultimately a higher success probability of $62.5\%$. Experimentally, we achieve a success probability of $(57.9 \pm 1.4)\%$, a significant improvement over the conventional scheme. With the possibility of extending the protocol to a larger number of ancillary photons, our work paves the way towards more efficient realisations of quantum technologies based on Bell-state measurements.
Self-gravitating field configurations: The role of the energy-momentum trace
Creators: name: Hod, Shahar
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Static spherically-symmetric matter distributions whose energy-momentum tensor is characterized by a non-negative trace are studied analytically within the framework of general relativity. We prove that such field configurations are necessarily highly relativistic objects. In particular, for matter fields with $T\geqα\cdotρ\geq0$ (here $T$ and $ρ$ are respectively the trace of the energy-momentum tensor and the energy density of the fields, and $α$ is a non-negative constant), we obtain the lower bound $\text{max}_r\{2m(r)/r\}>(2+2α)/(3+2α)$ on the compactness (mass-to-radius ratio) of regular field configurations. In addition, we prove that these compact objects necessarily possess (at least) {\it two} photon-spheres, one of which exhibits {\it stable} trapping of null geodesics. The presence of stable photon-spheres in the corresponding curved spacetimes indicates that these compact objects may be nonlinearly unstable. We therefore conjecture that a negative trace of the energy-momentum tensor is a {\it necessary} condition for the existence of stable, soliton-like (regular) field configurations in general relativity.
description: 11 pages
Supersymmetric partition function hierarchies and character expansions
Creators: name: Wang, Rui
name: Liu, Fan
name: Li, Min-Li
name: Zhao, Wei-Zhong
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct the supersymmetric $β$ and $(q,t)$-deformed Hurwitz-Kontsevich partition functions through $W$-representations and present the corresponding character expansions with respect to the Jack and Macdonald superpolynomials, respectively. Based on the constructed $β$ and $(q,t)$-deformed superoperators, we further give the supersymmetric $β$ and $(q,t)$-deformed partition function hierarchies through $W$-representations. We also present the generalized super Virasoro constraints, where the constraint operators obey the generalized super Virasoro algebra and null super 3-algebra. Moreover, the superintegrability for these (non-deformed) supersymmetric hierarchies is shown by their character expansions, i.e., $\sim character$.
description: 21 pages. Revised version accepted for publication in Eur. Phys. J. C
A one pot synthesis and characterization of intrinsically fluorescent cross-linked polyphosphazene nanospheres
Creators: name: Örüm, Simge Metinoğlu
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: Novel inorganic-organic hybrid highly crosslinked and fluorescent polyphosphazene nanospheres were prepared via a one pot polycondensation polymerization method. Fluorescein and 4,4′-diaminodiphenylmethane were used as organic monomers in the synthesis of the nanospheres. The crosslinked structure of the nanospheres was formed with inorganic octachlorocyclotetraphosphazene rings. The characterization of the prepared nanospheres was performed by SEM, EDX, solid-state 31P-NMR, FTIR, XPS, XRD, DLS, and UV-vis techniques. The average particle size of the nanospheres was determined to be 343 nm. The fluorescence properties of the nanospheres were investigated. When they were excited at 470 nm, the nanospheres exhibited a fluorescence emission at 520 nm in ethanol. However, they did not show fluorescence emission at solid state. The nanospheres exhibited maximum emission at pH 9.0. The synthesized nanospheres have excellent photostability in 60 minutes at pH 9.0 owing to the crosslinked and inorganic-organic hybrid structure.
Fractional charge and inter-Landau level states at points of singular curvature
Creators: name: Biswas, Rudro R.
name: Son, Dam T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The quest for universal signatures of topological phases is fundamentally important since these properties are robust to variations in system-specific details. Here we present general results for the response of quantum Hall states to points of singular curvature in real space. Such topological singularities may be realized, for instance, at the vertices of a cube, the apex of a cone, etc. We find, using continuum analytical methods, that the point of curvature binds an excess fractional charge. In addition, sequences of states split away, energetically, from the degenerate bulk Landau levels. Importantly, these inter-Landau level states are bound to the topological singularity and have energies that are $\emph{universal}$ functions of bulk parameters and the curvature. Remarkably, our exact diagonalization of lattice tight-binding models on closed manifolds shows that these results continue to hold even when lattice effects are significant, where the applicability of continuum techniques could not have been justified a priori. Moreover, we propose how these states may be readily experimentally actualized. An immediate technological implication of these results is that these inter-Landau level states, being as they are $\emph{both}$ energetically and spatially isolated quantum states, are promising candidates for constructing qubits for quantum computation.
Large-time asymptotic behaviors for the classical thermoelastic system
Creators: name: Chen, Wenhui
name: Takeda, Hiroshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we study the classical thermoelastic system with Fourier's law of heat conduction in the whole space $\mathbb{R}^n$ when $n=1,2,3$, particularly, asymptotic profiles for its elastic displacement as large-time. We discover optimal growth estimates of the elastic displacement when $n=1,2$, whose growth rates coincide with those for the free wave model, whereas when $n=3$ the optimal decay rate is related to the Gaussian kernel. Furthermore, under a new condition for weighted datum, the large-time optimal leading term is firstly introduced by the combination of diffusion-waves, the heat kernel and singular components. We also illustrate a second-order profile of solution by diffusion-waves with weighted $L^1$ datum as a by-product. These results imply that wave-structure large-time behaviors hold only for the one- and two-dimensional thermoelastic systems.
Gas-liquid coexistence for the bosons square-well fluid and the $\mbox{}^4$He binodal anomaly
Creators: name: Fantoni, Riccardo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The binodal of a boson square-well fluid is determined as a function of the particle mass through the newly devised quantum Gibbs ensemble Monte Carlo algorithm [R. Fantoni and S. Moroni, {\sl to be published}]. In the infinite mass limit we recover the classical result. As the particle mass decreases the gas-liquid critical point moves at lower temperatures. We explicitely study the case of a quantum delocalization de Boer parameter close to the one of $\mbox{}^4$He. For comparison we also determine the gas-liquid coexistence curve of $\mbox{}^4$He for which we are able to observe the binodal anomaly below the $λ$-transition temperature.
description: 4 pages, 3 figures
Antaeus: a retrograde group of tidal debris in the Milky Way's disk plane
Creators: name: Oria, Pierre-Antoine
name: Tenachi, Wassim
name: Ibata, Rodrigo
name: Famaey, Benoit
name: Yuan, Zhen
name: Arentsen, Anke
name: Martin, Nicolas
name: Viswanathan, Akshara
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the discovery of a wide retrograde moving group in the disk plane of the Milky Way using action-angle coordinates derived from the \textit{Gaia} DR3 catalog. The structure is identified from a sample of its members that are currently almost at the pericenter of their orbit and are passing through the Solar neighborhood. The motions of the stars in this group are highly correlated, indicating that the system is probably not phase mixed. With a width of at least 1.5 kpc and with a probable intrinsic spread in metallicity, this structure is most likely the wide remnant of a tidal stream of a disrupted ancient dwarf galaxy (age $\sim 12$ Gyr, $\langle {\rm [Fe/H]} \rangle \sim -1.74$). The structure presents many similarities (e.g. in energy, angular momentum, metallicity, and eccentricity) with the Sequoia merging event. However, it possesses extremely low vertical action $J_z$ which makes it unique even amongst Sequoia dynamical groups. As the low $J_z$ may be attributable to dynamical friction, we speculate that the these stars may be the remnants of the dense core of the Sequoia progenitor.
description: 6 pages, 4 figures, 1 table. Submitted to ApJL
1H NMR spectra, structure, and conformational exchange of S-n-alkyl-tetrahydrothiophenium cations of some ionic liquids
Creators: name: Hägele, Gerhard
name: Nazarski, Ryszard B.
name: Schmitz, Alexa
name: Xing, Shanghua
name: Janiak, Christoph
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: S-n-alkyl-tetrahydrothiophenium cations [R-THT]+ in some iodide or tetraphenylborate ion-pairs [R-THT][X] (R = methyl to n-decyl, X−= I−, [BPh4]−, [NTf2]−) are characterized in the solid state by puckered THT rings in twist forms. In contrast, solution 1H NMR spectra of compounds [R-THT][X] indicate a rapid conformational exchange leading to dynamic [ABCD]2 spin systems due to eight protons of the THT ring. These strongly coupled spectra obtained at high magnetic fields were analyzed by iterative methods and simulated successfully. In addition, molecular modeling and gauge-including atomic orbitals (GIAOs) based calculations of proton NMR chemical shifts for two such ion-pair compounds in solution were performed at the density functional theory (DFT) level . As a result, conformational equilibrium between two different pairs of isoenergetic twist forms of the THT ring in [Me-THT][I] (global and local energy minima) was found to exist. These theoretical results are discussed in view of experimental 1H NMR spectral data.
A stochastic model solvable without integrability
Creators: name: Mathieu, F.
name: Ragoucy, E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We introduce a model with diffusive and evaporation/condensation processes, depending on 3 parameters obeying some inequalities. The model can be solved in the sense that all correlation functions can be computed exactly without the use of integrability. We show that the mean field approximation is not exact in general. This can be shown by looking at the analytical expression of the two-point correlation functions, that we provide. We confirm our analysis by numerics based on direct diagonalisation of the Markov matrix (for small values of the number of sites) and also by Monte-Carlo simulations (for a higher number of sites). Although the model is symmetric in its diffusive rates, it exhibits a left / right asymmetry driven by the evaporation/condensation processes. We also argue that the model can be taken as a one-dimensional model for catalysis or fracturing processes.
description: 23 pages, 11 figures
Launching Telemedicine in Primary Care for Underserved Communities in the Philippines
Creators: name: Tang, Hilary
name: Gallo, Arthur
name: Kolluru, Sowmya
name: Kolluru, Srikar
name: Zamignani, Nicole
name: Sales, Chloe
name: Tran, Ava
name: Gabiola, Julieta
Publisher: name: Stanford Digital Repository
Year: 2023
Subjects: Stanford Medicine Center for Asian Health Research and Education
Stanford University School of Medicine
Stanford Department of Medicine
Division of Primary Care and Population Health
global health
Philippines
telemedicine
health technology
noncommunicable diseases
underserved

description: The ABC’s for Global Health (ABCGH) Telemedicine Project addresses these issues in underserved Filipino barangays by connecting patients with remotely located doctors through telecommunication. ABCGH utilizes Doctorgram kits containing Bluetooth-compatible medical equipment such as a stethoscope, thermometer, pulse oximetry, EKG, and a mobile application enabling video connection. By training barangay health workers on the usage of the telemedicine toolkit, we can effectively deliver primary care to patients, transcending geographical barriers by directly connecting doctors and patients for synchronous, virtual visits.
Heavy-quark expansion for D and B mesons in nuclear matter
Creators: name: Buchheim, Thomas
name: Hilger, Thomas
name: Kampfer, Burkhard
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The planned experiments at FAIR enable the study of medium modifications of $D$ and $B$ mesons in (dense) nuclear matter. Evaluating QCD sum rules as a theoretical prerequisite for such investigations encounters heavy-light four-quark condensates. We utilize an extended heavy-quark expansion to cope with the condensation of heavy quarks.
description: Contribution to the MESON2014 conference, Krak\'ow, Poland. To appear in the proceedings
Responsible Urban Intelligence: Towards a Research Agenda
Creators: name: Cao, Rui
name: Gao, Qi-Li
name: Qiu, Guoping
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Acceleration of urbanisation is posing great challenges to sustainable development. Growing accessibility to big data and artificial intelligence (AI) technologies have revolutionised many fields and offered great potential for addressing pressing urban problems. However, using these technologies without explicitly considering responsibilities would bring new societal and environmental issues. To maximise the benefits of big data and AI while minimising potential issues, we envisage a conceptual framework of Responsible Urban Intelligence (RUI) and advocate an agenda for action. We first define RUI as consisting of three major components including urban problems, enabling technologies, and responsibilities; then introduce transparency, fairness, and eco-friendliness as the three dimensions of responsibilities which naturally link with the human, space, and time dimensions of cities; and further develop a four-stage implementation framework for responsibilities as consisting of solution design, data preparation, model building, and practical application; and finally present a research agenda for RUI addressing challenging issues including data and model transparency, tension between performance and fairness, and solving urban problems in an eco-friendly manner.
Communication: Newton homotopies for sampling stationary points of potential energy landscapes
Creators: name: Mehta, Dhagash
name: Chen, Tianran
name: Hauenstein, Jonathan D
name: Wales, David J
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Numerical Analysis (math.NA)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: One of the most challenging and frequently arising problems in many areas of science is to find solutions of a system of multivariate nonlinear equations. There are several numerical methods that can find many (or all if the system is small enough) solutions but they each exhibit characteristic problems. Moreover, traditional methods can break down if the system contains singular solutions. Here, we propose an efficient implementation of Newton homotopies, which can sample a large number of the stationary points of complicated many-body potentials. We demonstrate how the procedure works by applying it to the nearest-neighbor $ϕ^4$ model and atomic clusters.
description: 5 pages, 3 figures. Published in Communications of Journal of Chemical Physics