cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phase space geometry and optimal state preparation in quantum metrology with collective spins
Creators: name: Muñoz-Arias, Manuel H.
name: Deutsch, Ivan H.
name: Poggi, Pablo M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We revisit well-known protocols in quantum metrology using collective spins and propose a unifying picture for optimal state preparation based on a semiclassical description in phase space. We show how this framework allows for quantitative predictions of the timescales required to prepare various metrologically useful states, and that these predictions remain accurate even for moderate system sizes, surprisingly far from the classical limit. Furthermore, this framework allows us to build a geometric picture that relates optimal (exponentially fast) entangled probe preparation to the existence of separatrices connecting saddle points in phase space. We illustrate our results with the paradigmatic examples of the two-axis counter-twisting and twisting-and-turning Hamiltonians, where we provide analytical expressions for all the relevant optimal time scales. Finally, we propose a generalization of these models to include $p$-body collective interaction (or $p$-order twisting), beyond the usual case of $p=2$. Using our geometric framework, we prove a no-go theorem for the local optimality of these models for $p>2$.
description: 15 pages, 6 figures, 9 pages appendix
ARCHITECTURAL INNOVATIONS FOR IMPROVED ACCESSIBILITY IN HEALING SPACES
Creators: name: Ibe, Kingsley, Nnamdi
name: Okeke,, Adaobi Michelle
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Therapeutic Architecture, Accessibility, Disability, Healthcare

description: Therapeutic architecture plays a crucial role in improving the physical, emotional and psychological well-being of individuals requiring healthcare services. Therapeutic architecture prioritizes accessibility ensuring all users regardless of their abilities are able to utilize the facility. This paper explores strategies for improving accessibility in therapeutic architecture with the aim of creating inclusive spaces that cater to the diverse needs of its users. Inclusive design is very key in all building types as it fosters a sense of dignity, independence and comfort for users across all demographics. It examines the various physical, sensory and cognitive barriers that limits ease of movement and outlines a framework for solving those challenges.
A rapid and objective characterization of channel morphology in a small, forested channel using a remotely piloted aircraft.
Creators: name: Helm, Carina
Publisher: name: University of British Columbia
Year: 2019

description: The use of remotely piloted aircrafts (RPAs) in fluvial geomorphology has improved the ability to characterize streams at greater resolutions and spatial extents than was previously attainable using traditional survey techniques. However, their use has been generally limited to streams under ideal conditions that differ from the small, forested mountain channels common in the Pacific Northwest. These channels have remained difficult to characterize using modern techniques due to their dense canopies and rough terrain. A rapid and objective method of characterizing channel morphology across the river basin using a RPA is presented in this dissertation to help overcome this challenge. First, the accuracy of RPAs for extracting bed elevations, bathymetry and grain size along 3 km of Carnation Creek, a small, forested stream on Vancouver Island, was investigated through a sub-canopy survey. Relevant cross-sectional channel variables were then extracted to objectively characterize channel morphologies across the river basin using a principal component analysis-clustering (PCA-clustering) technique. Then the Shannon's diversity index was used to characterize the local diversity across the channel, and investigate the scale needed to study the system, to ensure its heterogeneity was characterized. The results demonstrate that RPAs provide a rapid alternative to characterizing these systems, through the construction of a 2-cm resolution digital elevation model spanning 3 km of channel, with a root-mean-square-error of 0.093 m for exposed bed check points and 0.1 m for submerged bed check points. The PCA-clustering analysis provided an objective means of classifying channel morphology with a correct classification rate of 85%. Altogether, the results provide a precedent for using a RPA to characterize the morphology and diversity of small, forested channels at a scale of ecological relevance to the life histories of Pacific salmonids.
Second Homologous Series of Iron Pnictide Oxide Superconductors (Fe2As2)(Can+2(Al,Ti)nOy)[n = 2,3,4]
Creators: name: Ogino, Hiraku
name: Machida, Kenji
name: Yamamoto, Akiyasu
name: Kishio, Kohji
name: Shimoyama, Jun-ichi
name: Tohei, Tetsuya
name: Ikuhara, Yuichi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have discovered a new homologous series of iron pnictide oxides (Fe2As2)(Can+2(Al,Ti)nOy)[n = 2,3,4]. These compounds have perovskite-like blocking layers between Fe2As2 layers. The structure of new compounds are tetragonal with space groups of P4/nmm for n = 2 and 4 and P4mm for n = 3, which are similar to those of (Fe2As2)(Can+1(Sc,Ti)nOy)[n = 3,4,5] found in our previous study. Compounds with n = 3 and 4 have new crystal structures with 3 and 4 sheets of perovskite layers, respectively, including a rock salt layer in each blocking layer. The a-axis lengths of the three compounds are approximately 3.8 A, which are close to those of FeSe and LiFeAs. (Fe2As2)(Ca6(Al,Ti)4Oy) exhibited bulk superconductivity in magnetization measurement with Tc(onset)~36 K and resistivity drop was observed at ~39 K. (Fe2As2)(Ca5(Al,Ti)3Oy) also showed large diamagnetism at low temperatures. These new compounds indicate considerable rooms are still remaining for new superconductors in layered iron pnictides.
description: 10 pages, 5 figures
title: ÐÐ¾Ð¼Ð¼ÑÐ½Ð¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½ÑÐµ Ð¸Ð½ÑÑÑÑÐ¼ÐµÐ½ÑÑ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÐ¸ÑÐ¼ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÑÐ¸Ð»Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ (Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ ÐºÐ¾ÑÐµÐ¹Ð½Ð¸ Â«Ð¨Ð¾ÐºÐ¾Ð»Ð°Ð´Â»)
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Communication tools for the implementation of the corporate identity of the enterprise (on the example of the coffee house "Chocolate")
Creators: name: ÐÐ¾ÑÐ¾Ð·, ÐÐ°ÑÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÑÐ¸ÑÐ¼ÐµÐ½Ð½ÑÐ¹ ÑÑÐ¸Ð»Ñ
Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ðµ
ÑÐ¾ÑÐ¸Ð°Ð»ÑÐ½ÑÐµ ÑÐµÑÐ¸
ÐºÐ¾ÑÐµÐ¹Ð½Ñ
ÐºÐ¾Ð½ÑÐµÐ½Ñ-ÑÑÑÐ°ÑÐµÐ³Ð¸Ñ
ÑÐµÐºÐ»Ð°Ð¼Ð°
ÑÐ°ÑÐ³ÐµÑ
corporate identity
promotion
social networks
coffee shop
content strategy
advertising
targeting

description: Ð ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐµ Ð¸Ð·ÑÑÐ¸Ð»Ð¸ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ñ Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ñ ÐºÐ¾ÑÐµÐ¹Ð½Ð¸. Ð ÑÐ°Ð±Ð¾ÑÐµ ÑÐ´ÐµÐ»ÑÐµÑÑÑ Ð²ÑÐµÐ¼Ñ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ, Ð¸Ð·ÑÑÐµÐ½Ð¸Ñ Ð¸ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð½Ð° Ð¿ÑÐ°ÐºÑÐ¸ÐºÐµ ÐºÐ¾Ð½ÑÐµÐ½Ñ-ÑÑÑÐ°ÑÐµÐ³Ð¸Ð¸ Ð¿ÑÐ¾Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ñ ÐºÐ¾ÑÐµÐ¹Ð½Ð¸ ÑÐµÑÐµÐ· ÑÐ¾ÑÐ¸Ð°Ð»ÑÐ½ÑÐµ ÑÐµÑÐ¸. Ð ÐºÐ°ÑÐµÑÑÐ²Ðµ Ð¾Ð±ÑÐµÐºÑÐ° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð²ÑÐ±ÑÐ°Ð½ ÑÐ¸ÑÐ¼ÐµÐ½Ð½ÑÐ¹ ÑÑÐ¸Ð»Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÐºÐ¾ÑÐµÐ¹Ð½Ð¸ Â«Ð¨Ð¾ÐºÐ¾Ð»Ð°Ð´Â». ÐÑÐµÐ´Ð¼ÐµÑÐ¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð»ÑÑÑÑÑ ÐºÐ¾Ð¼Ð¼ÑÐ½Ð¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½ÑÐµ Ð¸Ð½ÑÑÑÑÐ¼ÐµÐ½ÑÑ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÐ¸ÑÐ¼ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÑÐ¸Ð»Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ ÐºÐ¾ÑÐµÐ¹Ð½Ð¸ Â«Ð¨Ð¾ÐºÐ¾Ð»Ð°Ð´Â». Ð Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ°ÑÑÐ¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ SWOT-Ð°Ð½Ð°Ð»Ð¸Ð·.
description: As a result, we studied the problem of promoting a coffee shop. The work devotes time to the development, study and practical application of the content strategy for promoting a coffee shop through social networks. The corporate identity of the enterprise of the coffee house Â«ChocolateÂ» was chosen as the object of the study. The subject of the research is the communication tools for the implementation of the corporate identity of the enterprise on the example of the coffee house Â«ChocolateÂ». In the practical part, a SWOT analysis was carried.
Modewise Johnson-Lindenstrauss Embeddings for Nuclear Many-Body Theory
Creators: name: Zare, A.
name: Wirth, R.
name: Haselby, C. A.
name: Hergert, H.
name: Iwen, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this work, we explore modewise Johnson-Lindenstrauss embeddings (JLEs) as a tool to reduce the computational cost and memory requirements of nuclear many-body methods. JLEs are randomized projections of high-dimensional data tensors onto low-dimensional subspaces that preserve key structural features. Such embeddings allow for the oblivious and incremental compression of large tensors, e.g., the nuclear Hamiltonian, into significantly smaller random sketches that still allow for the accurate calculation of ground-state energies and other observables. Their oblivious character makes it possible to compress a tensor without knowing in advance exactly what observables one might want to approximate at a later time. This opens the door for the use of tensors that are much too large to store in memory, e.g., complete two-plus three-nucleon Hamiltonians in large, symmetry-unrestricted bases. Such compressed Hamiltonians can be stored and used later on with relative ease. As a first step, we analyze the JLE's impact on the second-order Many-Body Perturbation Theory (MBPT) corrections for nuclear ground-state observables. Numerical experiments for a wide range of closed-shell nuclei, model spaces and state-of-the-art nuclear interactions demonstrate the validity and potential of the proposed approach: We can compress nuclear Hamiltonians hundred- to thousand-fold while only incurring mean relative errors of 1\% or less in ground-state observables. Importantly, we show that JLEs capture the relevant physical information contained in the highly structured Hamiltonian tensor despite their random characteristics. In addition to the significant storage savings, the achieved compressions imply multiple order-of magnitude reductions in computational effort when the compressed Hamiltonians are used in higher-order MBPT or nonperturbative many-body methods.
description: 23 pages, 14 figures
Mn(Pt$_{1-x}$Pd$_{x}$)$_5$P: Isovalent Tuning of Mn Sublattice Magnetic Order
Creators: name: Slade, Tyler J.
name: Mudiyanselage, Ranuri S. Dissanayaka
name: Furukawa, Nao
name: Smith, Tanner R.
name: Schmidt, Juan
name: Wang, Lin-Lin
name: Kang, Chang-Jong
name: Wei, Kaya
name: Shu, Zhixue
name: Kong, Tai
name: Baumbach, Ryan
name: Kotliar, Gabriel
name: Budko, Sergey L.
name: Xie, Weiwei
name: Canfield, Paul C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the growth and characterization of MnPd$_5$P, a ferromagnet with T$_C$ $\approx$ 295 K, and conduct a substitutional study with its antiferromagnetic analogue MnPt$_5$P. We grow single crystals of MnPd$_5$P and Mn(Pt$_{1-x}$Pd$_x$)$_5$P by adding Mn into (Pt$_{1-x}$Pd$_{x}$)-P based melts. All compounds in the family adopt the layered anti-CeCoIn$_5$ structure with space group P4/mmm, and EDS and XRD results indicate that MnPt$_5$P and MnPd$_5$P form a solid solution. Based on magnetization and resistance data, we construct a T-x phase diagram for Mn(Pt$_{1-x}$Pd$_x$)$_5$P and demonstrate the antiferromagnetic order found in MnPt$_5$P is extraordinarily sensitive to Pd substitution. At low Pd fractions (x $<$ 0.010), the single antiferromagnetic transition in pure MnPt$_5$P splits into a higher temperature ferromagnetic transition followed on cooling by a lower temperature ferromagnetic to antiferromagnetic transition and then by a re-entrant antiferromagnetic to ferromagnetic transition at lower temperatures. The antiferromagnetic region makes up a bubble that persists to x $\approx$ 0.009 for T $\approx$ 150 K, with all samples x $<$ 0.009 recovering their initial ferromagnetic state with further cooling to base temperature. Over the same low x range we find a non-monotonic change in the room temperature unit cell volume, further suggesting that pure MnPt$_5$P is close to an instability. Once x $>$ 0.010, Mn(Pt$_{1-x}$Pd$_x$)$_5$P undergoes a single ferromagnetic transition. The Curie temperature increases rapidly with x, rising from T$_C$ $\approx$ 197 K at x = 0.013 to a maximum of T$_C$ $\approx$ 312 K for x $\approx$ 0.62, and then falls back to T$_C$ $\approx$ 295 K for pure MnPd$_5$P (x = 1). Given that Pt and Pd are isoelectronic, this work raises questions as to the origin of the extreme sensitivity of the magnetic ground state in MnPt$_5$P upon introducing Pd.
Universal Gibbons-Hawking-York term for theories with curvature, torsion and non-metricity
Creators: name: Erdmenger, Johanna
name: Heß, Bastian
name: Matthaiakakis, Ioannis
name: Meyer, René
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Motivated by establishing holographic renormalization for gravitational theories with non-metricity and torsion, we present a new and efficient general method for calculating Gibbons-Hawking-York (GHY) terms. Our method consists of linearizing any nonlinearity in curvature, torsion or non-metricity by introducing suitable Lagrange multipliers. Moreover, we use a split formalism for differential forms, writing them in $(n-1)+1$ dimensions. The boundary terms of the action are manifest in this formalism by means of Stokes' theorem, such that the compensating GHY term for the Dirichlet problem may be read off directly. We observe that only those terms in the Lagrangian that contain curvature contribute to the GHY term. Terms polynomial solely in torsion and non-metricity do not require any GHY term compensation for the variational problem to be well-defined. We test our method by confirming existing results for Einstein-Hilbert and four-dimensional Chern-Simons modified gravity. Moreover, we obtain new results for Lovelock-Chern-Simons and metric-affine gravity. For all four examples, our new method and results contribute to a new approach towards a systematic hydrodynamic expansion for spin and hypermomentum currents within AdS/CFT.
description: Submission to SciPost, 22+9 pages, v2: extended discussion in section 3.3, added citations
LLMs and User Data Privacy: Leveraging Federated Learning with Homomorphic Encryption
Creators: name: Rawal, Bharat
Publisher: name: Zenodo
Year: 2025

description: Presented at the “NAIRR Pilot Inaugural Annual Meeting” (NSF Award #2452148), Arlington, VA, USA, February 19-21, 2025. https://zenodo.org/communities/nairr2025
A THESIS SUBMITTED TO THE  DEPARTMENT OF METEOROLOGY AND HYDROLOGY,  SCHOOL OF GRADUATE STUDIES, ARBA MINCH UNIVERSITY  FOR PARTIAL FULFILLMENT OF THE REQUERIMENTS FOR THE  DEGREE OF MASTERS OF SCIENCE IN CLIMATE CHANGE AND  DEVELOPMENT
Creators: name: Mr.  Amba  Shalishe
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Climate  change  is  a  topic  of  discussion  worldwide  including  Ethiopia.  The  present  study
assessed  the  possible  impacts  of  climate  change  on  runoff  in  the  upper  Birbir  sub  basin
which  is  located  in  8°48′17′′ and  9°22′19′′ N  and  34°C49′39′′and  35°C37′27′′E;  western
Ethiopia.  CORDEX-Africa  data  outputs  of  HadGEM2-ES  for upper Birbir sub basin were
selected under representative concentration pathways (RCP4.5& RCP8.5) scenario to make
future  projections  in  two  time  frames:  mid-term  (2041-2070)  and  long-term (2071-2100).
After assessment of data quality;  Bias,  Coefficient of Variation  and correlation were used to
evaluate  the  systematic  error  of  rainfall  amount,  degree  of  rainfall  variability  and  the
relationship  of  model  outputs  and  observed datasets  in addition to  graphical plots.  Trend
detection  was  evaluated  by  Mann-Kendall  trend  test  and  sen’s  estimators.  Hargreaves
method was used to estimate current and future evapotranspiration. HBV model was selected
to  simulate  future  stream  flow  for  the  projected  climate  variables .  Coefficient  of
determination (R
2
), Nash-Sutcliffe Efficiency (NSE), Relative Volume Error (RVE) and  Root
mean square error observation standard deviation ratio (RSR)  were statistical tools used for
performance  evaluation  of  rainfall-runoff  model (HBV) with a result of 0.82, 0.81, 5.70%
and 0.11during calibration period.    The  observed annual rainfall shows upward trend except
for  Yubdo  station, and  temperature  shows warming trend.  Future projections of runoff will
be expected to decrease in winter and spring while increase in summer  and  autumn, mainly
followed the rainfall  projected pattern.    In mid-term, the annual average runoff projection
will be expected to decrease by 2.05% and 1.35% under RCP4.5 and RCP8.5, respectively.
In long-term, it will be expected to decrease by about 0.03% a nd 2.0% under RCP4.5 and
RCP8.5 over upper Birbir sub basin.
Keywords: Upper Birbir sub basin, Climate change, HBV,  Trend detection, RCP and Runoff.
Did JWST observe imprints of axion miniclusters or primordial black holes?
Creators: name: Hütsi, Gert
name: Raidal, Martti
name: Urrutia, Juan
name: Vaskonen, Ville
name: Veermäe, Hardi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The James Webb Space Telescope has detected surprisingly luminous early galaxies that indicate a tension with the $Λ$CDM. Motivated by scenarios including axion miniclusters or primordial black holes, we consider power-law modifications of the matter power spectrum. We show that the tension could be resolved if dark matter consists of $2\times 10^{-18}{\rm eV}$ axions or if a fraction $f_{\rm PBH} > 0.005$ of dark matter is composed of compact heavy $4\times 10^6 M_\odot (f_{\rm PBH}/0.005)^{-1}$ structures such as primordial black hole clusters. However, in both cases, the star formation efficiency needs to be significantly enhanced.
description: published version with added references
Revealing digital documents. Concealed structures in data
Creators: name: Voß, Jakob
Publisher: name: arXiv
Year: 2011
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: This short paper gives an introduction to a research project to analyze how digital documents are structured and described. Using a phenomenological approach, this research will reveal common patterns that are used in data, independent from the particular technology in which the data is available. The ability to identify these patterns, on different levels of description, is important for several applications in digital libraries. A better understanding of data structuring will not only help to better capture singular characteristics of data by metadata, but will also recover intended structures of digital objects, beyond long term preservation.
description: 8 pages, accepted for TPDL 2011 Doctoral Consortium
Coherent and incoherent structures in fuzzy dark matter halos
Creators: name: Liu, I-Kang
name: Proukakis, Nick P.
name: Rigopoulos, Gerasimos
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We show that fuzzy dark matter halos exhibit spatial differentiation in the degree of coherence of the field configuration, ranging from completely coherent in the central solitonic core to incoherent outside it, with a crossover region in between the two phases. The solitonic core is indeed a pure condensate which overlaps almost perfectly with the Penrose-Onsager mode corresponding to the largest eigenvalue of the one-particle density matrix. The virialized outer halo surrounding the core exhibits no clear coherence as a whole upon radial and temporal averaging. However, when viewed locally and for short times, it can be described as a collection of quasi-condensate lumps exhibiting locally suppressed fluctuations which can be identified with the structures commonly referred to as granules. Phase coherence across the entire halo is inhibited by a dynamically evolving tangled web of vortices separating the localized quasi-condensate regions. Moreover, the dimensionless phase-space density in the outer halo drops significantly below its value at the core. We further examine the dynamics of this spatial structure and find that the oscillations of the core can be accurately described by two time-dependent parameters respectively characterizing the size of the core, $r_c(t)$, and the crossover region, $r_t(t)$. For the halos produced in our merger simulations this feature is reflected in the (anti-)correlated oscillation of the peak value of the field configuration's power-spectrum. The turbulent vortex tangle of the virialized halo appears to reach a quasi-equilibrium state over probed timescales, with the incompressible component of the kinetic energy exhibiting a characteristic $k^{-3}$ tail in its spectrum, indicative of a $ρ\sim r^2$ density profile around the quantum vortex cores. Comparison of the peak wavenumbers in the corresponding power-spectra shows that the inter-vortex...
ANALYSIS OF CLIMATE VARIABILITY AND THE ASSOCIATED  METEOROLOGICAL DROUGHT IN THE SOUTHERN PART OF  ETHIOPIAN RIFT VALLEY
Creators: name: TADEWOS SEYOUM DELKASO
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Nowadays, climate variability and its impact is the main  concern put at the top of global
agenda. Climate variability in Ethiopia where agriculture is the dominant sector of the
economy is also increasingly attracting attention. A large percentage of the population is
already vulnerable to a range of natural hazards with increasing climate variability and
climate change expected to aggravate the situation further by causing more frequent and
intense droughts. In this study, climate variability was assessed  using different types of
parameters such as coefficient  of Variation(CV), rainfall anomaly index(RAI), Gaussian
index(GI) and other variability causing agents such as onset date of rainfall in season and El-
Nino seasonal impacts. The related meteorological drought occurrence in terms of severity,
duration and  frequency was also analyzed. The SPI calculator software was applied to
compute drought in the study area. The study area practiced drought of different severity in
different temporal and spatial scales other than common drought years that occurred
throughout the area. In order to analyze future climate variability and related drought events,
GCM derived scenarios (HadCM3 A2a & B2a SRES emission scenarios) were used for the
climate projection. The future climatic elements such as rainfall, maximum temperature and
minimum temperature are generated by SDSM software. There is high climate variability in
the smaller rainy season and mostly moderate to high climate variability in the main rainy
season. There will be low to moderate climate variability for both projection scenarios. The
future climatic condition and the related drought were analyzed from the projected climate
variables. There is a likely increasing maximum and minimum temperature for both
HadCM3 A2a & B2a SRES emission scenarios. Precipitation also will increase in the study
area with small decrease at Mirab station in2020s and slowly start to increase. Drought
resulting from climate variability is likely to occur. Areas such as Mirab Abaya and Alaba
station with smaller projected rainfall will be highly sensitive to dry climatic condition and
the related drought.  To  reduce the  impact of climate variability  and the related drought,  some
measures such as high awareness on climate variability for food production, attention to early
warnings and wise use of available water in the drought prone areas are recommended.
Coulomb Field Scattering in Born-Infeld Electrodynamics
Creators: name: Tennant, Daniel
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the context of Born-Infeld electrodynamics, the electromagnetic fields interact with each other via their non-linear couplings. A calculation will be performed where an incoming electromagnetic plane wave scatters off a Coulomb Field in the geometrical optics approximation. In addition to finding the first order angle of deflection, exact solutions for the trajectory will also be found. The possibility of electromagnetic bound states will be discussed.
Local suppression of the superfluid density of PuCoGa$_5$ in the Swiss Cheese model
Creators: name: Das, Tanmoy
name: Zhu, Jian-Xin
name: Graf, Matthias J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present superfluid density calculations for the unconventional superconductor PuCoGa$_5$ by solving the real-space Bogoliubov-de Gennes equations on a square lattice within the Swiss Cheese model in the presence of strong on-site disorder. We find that despite strong electronic inhomogeneity, one can establish a one-to-one correspondence between the local maps of the density of states, superconducting order parameter, and superfluid density. In this model, strong on-site impurity scattering punches localized holes into the fabric of d-wave superconductivity similar to a Swiss cheese. Already a two-dimensional impurity concentration of $n_{\rm imp} = 4%$ gives rise to a pronounced short-range suppression of the order parameter and a suppression of the superconducting transition temperature $T_c$ by roughly 20% compared to its pure limit value $T_{c0}$, whereas the superfluid density $ρ_s$ is reduced drastically by about 70%. This result is consistent with available experimental data for aged (400 day-old) and fresh (25 day-old) PuCoGa$_5$ superconducting samples. In addition, we show that the $T^2-$dependence of the low-$T$ superfluid density, a signature of dirty d-wave superconductivity, originates from a combined effect in the density of states of `gap filling' and `gap closing'. Finally, we demonstate that the Uemuera plot of $T_c$ vs.\ $ρ_s$ deviates sharply from the conventional Abrikosov-Gor'kov theory for radiation-induced defects in PuCoGa$_5$, but follows the same trend of short-coherence-length high-$T_c$ cuprate superconductors.
description: 11 pages, 5 figures, (v2) Resolution of figures are enhanced
Local entanglement generation in the adiabatic regime
Creators: name: Cliche, Mathieu
name: Veitia, Andrzej
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study entanglement generation in a pair of qubits interacting with an initially correlated system. Using time independent perturbation theory and the adiabatic theorem, we show conditions under which the qubits become entangled as the joint system evolves into the ground state of the interacting theory. We then apply these results to the case of qubits interacting with a scalar quantum field. We study three different variations of this setup; a quantum field subject to Dirichlet boundary conditions, a quantum field interacting with a classical potential and a quantum field that starts in a thermal state.
description: 9 pages, 6 figures. v2: reference [14] added
On generalised D1-D5 near horizons and their spectra
Creators: name: Lima, Mariana
name: Macpherson, Niall T.
name: Melnikov, Dmitry
name: Ypanaqué, Luis
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: There has been considerable recent interest in type II string compactifications on AdS$_3\times$S$^3\times$M$_{4}$ due to both new progress in the AdS$_3$/CFT$_2$ correspondence and an independent search for new ${\cal N}=(4,0)$ supergravity solutions. In this work we report a new family of small ${\cal N}=(4,0)$ preserving warped AdS$_3\times$S$^3\times $CY$_2$ compactifications of type IIB supergravity. The S$^3$ in this family is non trivially fibered over the CY$_2$. We show how these new solutions provide a IIB embedding of minimal ungauged $d=5$ supergravity coupled to an Abelian vector multiplet. We also make a few initial steps towards the identification of dual CFT$_2$ candidates. Specifically, we study the Kaluza-Klein spectrum of the spin two and certain vector fluctuations that are expected to be dual to the stress-energy tensor, SU(2) R current and several other BPS operator families in the dual CFT$_2$.
description: 28 pages + appendices
Lexical Functions and Cohesion in Imran Khan's Speech On 28 September 2019 at the United Nations General Assembly
Creators: name: Muhammad Asif, Deng Zhiyong
Publisher: name: TuEngr Group
Year: 2020
Subjects: Lexical function
Collocation analysis
United Nations General Assembly (UNGA)
Imran Khan's address
Lexical cohesion
Speech analysis.

description: International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 11, 16, 11A16K: 1-
Dynamic self-organisation and pattern formation by magnon-polarons
Creators: name: Gidding, M.
name: Janssen, T.
name: Davies, C. S.
name: Kirilyuk, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Nonlinear dynamics can give rise, via the processes of self-organisation and pattern formation, to the spontaneous manifestation of order in open and complex systems far from equilibrium. Self-organising systems, transforming the inflow of energy into information, are ubiquitously found in current topical areas of science ranging from brainwave entrainment and neuromorphic computing to energy-efficient data storage technologies. In the latter, magnetic materials play a pivotal role combining very fast switching with permanent retention of information. However, it has been shown that, at very short time scales, magnetisation dynamics become chaotic due to internal instabilities, resulting in incoherent spin-wave excitations that ultimately destroy magnetic ordering. Here, contrary to all expectations, we show that such chaos gives rise to a periodic pattern of reversed magnetic domains, with a feature size far smaller than the spatial extent of the excitation. We explain this pattern as a result of phase-synchronisation of magnon-polaron waves, driven by strong coupling of magnetic and elastic modes. Our results reveal not only the peculiar formation and evolution of magnon-polarons at short time-scales, but also present a novel mechanism of magnetization reversal driven by coherent packets of short-wavelength quasiparticles.
ARBA MINCH UNIVERSITY SCHOOL OF POST GRADUATE STUDIES DEPARTMENT OF METEOROLOGY AND HYDROLOGY
Creators: name: NIGATU KALSE
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: This study reviews the impact of climate change and variability on crop production mainly
on rain fed agriculture in Wolayta Zone. In all nine stations daily climate data were collected
from  NMSA  and  aggregated  to  monthly. The  monthly  rainfall  was varied  and distributed
moderately  on  annual  and  seasonal  basis in  all  stations.  The  occasion  of  onset  dates  are
slightly increasing (delaying) for both stations toward the recent years. The end dates of the
growing  season  were  decreasing  at  Wolayta  station  and  very  slightly  increasing  at  Bilate
station. The interannual variability of length of growing season for both the stations was low.
In both the stations, the dry spell length probability of longer than 5, 7 and 10 days were
decreasing from the starting date of the growing season to the middle of Belg season and
increasing  towards the  end  of  Belg  Season. SDSM is  applied  in  order  to  downscale  the
climate variables at the station level. Under A2 scenario, SDSM indicates an increase in the
mean monthly precipitation by 2%, 6%, and 15% in 2020s, 2050s and 2080s respectively,
while  under B2  scenario  it indicates  by  3%,  5%  and  11%  in  2020s, 2050s  and  2080s
respectively. Under A2 scenario, the monthly maximum temperature is projected to increase
by 1.4°C, 1.8°C and 3.7°C in 2020s, 2050s and 2080s respectively, while under B2 scenario
the increase will be 0.1°C, 1.0°C and 2.6°C in 2020s, 2050s and 2080s relative to baseline
period. Agricultural model AquaCrop was used to model the effect of changing climate. The
simulated  yield  of  the  selected  crops  in  study  area under  projected  climate  showed  a
decrease from baseline without considering the effect of CO2 fertilization and increase from
baseline by considering the effect of CO2 fertilization. The average reduction in the yield of
Maize under changing climate elements (i.e. temperature and precipitation) were noticed as
15%  and  12%  for  A2  and  B2  scenarios  respectively.  Similarly  the  Barley  average  yield
reduction perceived in the same aspect of climate under A2 and B2 scenarios are 18% and
15% respectively in the future tri-thirty (90 years) time period. On the other hand under the
combined  effect  of  changing  climate  and  CO2 fertilization  the  simulated  yield  of  selected
crops showed an increase from baseline. The average increments of Maize and Barley yield
over  the  total  period  of  90  years,  with  CO2  fertilization  effect  under  both  A2  and  B2
scenarios was evaluated as 3.3% and 2.3% , and 3.6% and 2.2% for investigated crops and
scenarios respectively.
Klein-Gordon Oscillator with Scalar and Vector Potentials in Topologically Charged Ellis-Bronnikov type Wormhole
Creators: name: Moussa, Abbad
name: Aounallah, Houcine
name: Rudra, Prabir
name: Ahmed, Faizuddin
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we study the Klein-Gordon oscillator with equal scalar and vector potentials in a topologically charged Ellis-Bronnikov wormhole space-time background. The behaviour of a relativistic oscillator field is studied with a position-dependent mass via transformation $M^{2}\rightarrow (M+S(x))^{2}$ and vector potential through a minimal substitution in the wave equation. Simplifying the Klein-Gordon oscillator equation for three different types of potential, such as linear confining, Coulomb-type, and Cornell-type potential and we arrive at a second-order differential equation known as the biconfluent Heun (BCH) equation and the corresponding confluent Heun function. Finally, we solve the wave equation by the Frobenius method as a power series expansion around the origin and obtain the energy levels and the wave function.
description: 16 pages
Regimes of strong light-matter coupling under incoherent excitation
Creators: name: del Valle, E.
name: Laussy, F. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a two-level system (atom, superconducting qubit or quantum dot) strongly coupled to the single photonic mode of a cavity, in the presence of incoherent pumping and including detuning and dephasing. This system displays a striking quantum to classical transition. On the grounds of several approximations that reproduce to various degrees exact results obtained numerically, we separate five regimes of operations, that we term "linear", "quantum", "lasing", "quenching" and "thermal". In the fully quantized picture, the lasing regime arises as a condensation of dressed states and manifests itself as a Mollow triplet structure in the direct emitter photoluminescence spectrum, which embeds fundamental features of the full-field quantization description of light-matter interactions.
description: 23 pages, 14 figures
Demonstration of Gd-GEM detector design for neutron macromolecular crystallography applications
Creators: name: Pfeiffer, D.
name: Brunbauer, F.
name: Hall-Wilton, R.
name: Lupberger, M.
name: Marko, M.
name: Muller, H.
name: Oksanen, E.
name: Oliveri, E.
name: Ropelewski, L.
name: Rusu, A.
name: Samarati, J.
name: Scharenberg, L.
name: van Stenis, M.
name: Thuiner, P.
name: Veenhof, R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The European Spallation Source (ESS) in Lund, Sweden will become the world's most powerful thermal neutron source. The Macromolecular Diffractometer (NMX) at the ESS requires three 51.2 x 51.2~cm$^{2}$ detectors with reasonable detection efficiency, sub-mm spatial resolution, a narrow point spread function (PSF) and good time resolution. This work presents measurements with the improved version of the NMX detector prototype consisting of a Triple-GEM detector with natural Gd converter and a low material budget readout. The detector was successfully tested at the neutron reactor of the Budapest Neutron Centre (BNC) and at the D16 instrument at the Institut Laue-Langevin (ILL) in Grenoble. The measurements with Cadmium and Gadolinium masks in Budapest demonstrate that the point spread function of the detector lacks long tails that could impede the measurement of diffraction spot intensities. On the D16 instrument at ILL, diffraction spots from Triose phosphate isomerase w/ 2-phosphoglycolate (PGA) inhibitor were measured both in the D16 Helium-3 detector and the Gd-GEM. The comparison between the two detectors show a similar point spread function in both detectors, and the expected efficiency ratio compared to the Helium-3 detector. Both measurements together thus give good indications that the Gd-GEM detector fits the requirements for the NMX instrument at ESS.
WASP-37b: a 1.8 MJ exoplanet transiting a metal-poor star
Creators: name: Simpson, E. K.
name: Faedi, F.
name: Barros, S. C. C.
name: Brown, D. J. A.
name: Cameron, A. Collier
name: Hebb, L.
name: Pollacco, D.
name: Smalley, B.
name: Todd, I.
name: Butters, O. W.
name: Hebrard, G.
name: McCormac, J.
name: Miller, G. R. M.
name: Santerne, A.
name: Street, R. A.
name: Skillen, I.
name: Triaud, A. H. M. J.
name: Anderson, D. R.
name: Bento, J.
name: Boisse, I.
name: Bouchy, F.
name: Enoch, B.
name: Haswell, C. A.
name: Hellier, C.
name: Holmes, S.
name: Horne, K.
name: Keenan, F. P.
name: Lister, T. A.
name: Maxted, P. F. L.
name: Moulds, V.
name: Moutou, C.
name: Norton, A. J.
name: Parley, N.
name: Pepe, F.
name: Queloz, D.
name: Segransan, D.
name: Smith, A. M. S.
name: Stempels, H. C.
name: Udry, S.
name: Watson, C. A.
name: West, R. G.
name: Wheatley, P. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report on the discovery of WASP-37b, a transiting hot Jupiter orbiting a mv = 12.7 G2-type dwarf, with a period of 3.577471 \pm 0.00001 d, transit epoch T0 = 2455338.6188 \pm 0.0006 (HJD), and a transit duration 0.1304 \pm 0.0018 d. The planetary companion has a mass Mp = 1.80 \pm 0.17 MJ and radius Rp = 1.16 \pm 0.07 RJ, yielding a mean density of 1.15 \pm 0.15 times that of Jupiter. From a spectral analysis and comparisons with stellar models, we find the host star has M* = 0.925 \pm 0.120 Msun, R* = 1.003 \pm 0.053 Rsun, Teff = 5800 \pm 150 K and [Fe/H] = -0.40 \pm 0.12. WASP-37 is therefore one of the lowest metallicity stars to host a transiting planet.
description: AJ accepted, 20 pages, 6 figures
Individual differences in development and representation of novel affective associations
Creators: name: Ehlers, Mana R.
Publisher: name: University of British Columbia
Year: 2019

description: Emotionally arousing events are typically better remembered than mundane ones, in part because emotionally relevant aspects of our environment are prioritized in attention. Such biased attentional tuning is itself the result of associative processes through which we learn affective and motivational relevance of cues. While such affective biases in cognition can be highly adaptive, extreme biases to specific categories of aversive or rewarding stimuli can be symptomatic of psychopathology. That raises the question which factors contribute to individual differences in development of affective biases via emotional learning processes and how emotional associations come to be represented in the brain. More specifically, the present thesis aimed to investigate the role of individual differences in the norepinephrine and stress system in emotional learning processes. In Study I, I demonstrated that a common genetic variation putatively influencing norepinephrine availability is associated with subjective perception of ambiguous stimuli as more rewarding. Moreover, change in affective bias was mediated by acute stress. Thus, in the first study I established that individual differences in the locus coeruleus-norepinephrine (LC-NE) and stress system play a role in affective perception and the flexibility of the underlying subjective biases. In Study II and III, I found that acute stress affects both classical and operant conditioning and that the direction of those effects depends on the timing of the stressor relative to the learning experience. Study IV aimed to investigate the neural representation of the development of novel affective associations using functional magnetic resonance imaging (fMRI). By means of representational similarity analysis (RSA) - a multivariate approach to analyzing neuroimaging data - the study revealed that conditioned stimuli reactivate the representational pattern elicited by the unconditioned stimuli. I further observed that it is specifically the hedonic response to the unconditioned stimulus that is being reproduced by the conditioned stimulus. Together these studies demonstrate a role for the norepinephrine and stress system in reward-based learning as well as providing new information of neural mechanisms underlying emotional learning. This research provides insight into individual differences in emotional learning processes that can underlie formation of affective biases.
Local time and Tanaka formula for a Volterra-type multifractional Gaussian process
Creators: name: Boufoussi, Brahim
name: Dozzi, Marco
name: Marty, Renaud
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: The stochastic calculus for Gaussian processes is applied to obtain a Tanaka formula for a Volterra-type multifractional Gaussian process. The existence and regularity properties of the local time of this process are obtained by means of Berman's Fourier analytic approach.
description: Published in at http://dx.doi.org/10.3150/10-BEJ261 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
An analytic derivation of the empirical correlations of gamma-ray bursts
Creators: name: Xu, Fan
name: Huang, Yong-Feng
name: Geng, Jin-Jun
name: Wu, Xue-Feng
name: Li, Xiu-Juan
name: Zhang, Zhi-Bin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Empirical correlations between various key parameters have been extensively explored ever since the discovery of gamma-ray bursts (GRBs) and have been widely used as standard candles to probe the Universe. The Amati relation and the Yonetoku relation are two good examples that enjoyed special attention. The former reflects the connection between the peak photon energy (Ep) and the isotropic $γ$-ray energy release (Eiso), while the latter links Ep with the isotropic peak luminosity (Lp), both in the form of a power-law function. Most GRBs are found to follow these correlations well, but a theoretical interpretation is still lacking. Some obvious outliers may be off-axis GRBs and may follow correlations that are different from those at the on-axis. Here we present a simple analytical derivation for the Amati relation and the Yonetoku relation in the framework of the standard fireball model, the correctness of which is then confirmed by numerical simulations. The off-axis Amati relation and Yonetoku relation are also derived. They differ markedly from the corresponding on-axis relation. Our results reveal the intrinsic physics behind the radiation processes of GRBs, and they highlight the importance of the viewing angle in the empirical correlations of GRBs.
description: 12 pages, 7 figures, 2 tables. A&A accepted
How do tidal waves interact with convective vortices in rapidly-rotating planets and stars?
Creators: name: Dandoy, Virgile
name: Park, Junho
name: Augustson, Kyle
name: Astoul, Aurélie
name: Mathis, Stéphane
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The dissipation of tidal inertial waves in planetary and stellar convective regions is one of the key mechanisms that drive the evolution of star-planet/planet-moon systems. In this context, the interaction between tidal inertial waves and turbulent convective flows must be modelled in a realistic and robust way. In the state-of-the-art simulations, the friction applied by convection on tidal waves is modelled most of the time by an effective eddy-viscosity. This approach may be valid when the characteristic length scales of convective eddies are smaller than those of tidal waves. However, it becomes highly questionable in the case where tidal waves interact with potentially stable large-scale vortices, as those observed at the pole of Jupiter and Saturn. They are potentially triggered by convection in rapidly-rotating bodies in which the Coriolis acceleration forms the flow in columnar vortical structures along the direction of the rotation axis. In this paper, we investigate the complex interactions between a tidal inertial wave and a columnar convective vortex. We use a quasi-geostrophic semi-analytical model of a convective columnar vortex. We perform linear stability analysis to identify the unstable regime and conduct linear numerical simulations for the interactions between the convective vortex and an incoming tidal inertial wave. We verify that in the unstable regime, an incoming tidal inertial wave triggers the most unstable mode of the vortex leading to turbulent dissipation. For stable vortices, the wave-vortex interaction leads to the momentum mixing while it creates a low-velocity region around the vortex core and a new wave-like perturbation in the form of a progressive wave radiating in the far field. The emission of this secondary wave is the strongest when the wavelength of the incoming wave is close to the characteristic size of the vortex.
description: 20 pages, 15 figures, accepted in Astronomy & Astrophysics