cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multi-fidelity probabilistic optimisation of composite structures
Creators: name: Yoo, Kwangkyu (Alex)
Publisher: name: Imperial College London
Year: 2021

description: In this thesis, novel multi-fidelity modelling-based probabilistic optimisation methods are presented to address the computational challenge of stochastic design philosophies applied to complex aircraft composite structures. Novel multi-fidelity formulations developed in this thesis, blending High-Fidelity Model (HFM) and Low-Fidelity Model (LFM), are shown to significantly improve computational efficiency by making use of machine learning techniques, such as Artificial Neural Networks (ANN) and Non-linear Auto-Regressive Gaussian Process (NARGP). To further improve the computational efficiency compared to the conventional probabilistic optimisation methods, a multi-level optimisation approach and a new sampling strategy to collect training data points are incorporated into the multi- fidelity formulations for the first time. In the developed optimisation methods, the HFM covers part of the design space whilst the LFM explores the whole design space to fill the lack of high-fidelity information. This improvement enables the multi-fidelity formulations to request a much smaller number of high-fidelity information causing considerable computational costs. Several engineering examples such as aircraft mono-stringer composite panels are used to demonstrate the accuracy and computational efficiency of the developed methods when used with different reliability and robustness analysis techniques, including Monte Carlo Simulation (MCS), the First-Order Reliability Method (FORM) and the Second-Order Reliability Method (SORM). The composite panels are subjected to mechanical and thermomechanical loads to show the broad range of potential applications. It is shown that the newly developed multi-fidelity probabilistic optimisation methods offer substantial computational time savings ranging from 50 % to 70 % and levels of error typically less than 1 % when compared with traditional probabilistic optimisation methods. Results demonstrate that the newly developed multi-fidelity probabilistic optimisation methods herein provide significant computational benefits and accurately predict the influence of uncertainties associated with design and manufacturing stages. As a result, the presented methods confidently carry out reliability-based and robust design optimisation of large-scale and complex aircraft composite structures.
Advanced control techniques for parallel inverter operation without control interconnections
Creators: name: Tuladhar, Anil
Publisher: name: University of British Columbia
Year: 2009

description: In order to ensure true redundancy, expandability and good reliability of a power supply system, a distributed Uninterruptible Power Supply (UPS) system is required. A distributed UPS system can be realized by connecting many inverters in parallel. A technically challenging aspect of such a system is to develop a flexible control technique for proper load sharing among the parallel connected inverters without control interconnection and in the presence of unit to unit variations and the line impedance imbalances. The primary goal of this research is to develop such a new control technique to achieve a proper load sharing in a distributed fashion. Existing control techniques to operate inverters in parallel either require some form of control interconnections or do not guarantee the proper sharing of the reactive and distortion power. The interconnecting lines restrict the location of the inverters, and they are sources of noise and failure. In order to obtain a truly distributed power supply system with reliability, redundancy and expandability, these control interconnections will have to be removed. In this research, a new concept of sharing the reactive and distortion power has been developed. Two small signals, at a frequency other than the power frequency and its harmonics, are injected for the reactive and distortion power sharing in the power supply system. This technique allows proper sharing of both linear and nonlinear load among the inverters without any control interconnections. The technique can also automatically compensate for the differences between the units and the effect of line impedance. Techniques are also developed to enable the units to self-synchronize with the ac bus before connection. A unique method to handle the overload conditions and the constraints on the voltage adjustment band has been developed. In addition, efficient ways of calculating the reactive and distortion power have been developed. The proposed techniques were implemented in a fixed point DSP and were found to work well in a prototype system consisting of two commercial single-phase inverters under various operating conditions.
NONTRADITIONAL CROPS AND LAND ACCUMULATION AMONG GUATEMALAN SMALLHOLDERS: IS THE IMPACT SUSTAINABLE?
Creators: name: Carletto, Calogero
name: Carletto, Calogero
Publisher: name: Unknown
Year: 2000
Subjects: Crop Production/Industries
Land Economics/Use

description: Since the late 1970s dramatic economic changes have taken place in the agricultural sector in the highlands of Guatemala. The introduction of new export crops, such as snow peas, broccoli, and miniature vegetables, has led to yet another agro-export boom. Unlike earlier booms, however, this one has included all but the smallest farmers. The high rate of smallholder participation in the boom, and the initial high profitability of nontraditional exports (NTXs), fueled initial optimism that NTX production could increase smallholders’ ability to accumulate land and so decrease the highly skewed distribution of land in Guatemala, a country with one of the most unequal landholding patterns in all of Latin America. The picture that emerges from the analysis in this paper raises serious questions about the sustainability and equity effects of NTX crop adoption among smallholders in the long run. Two main findings illustrate the problems besetting NTX crop production. First, the land accumulation rates of adopters have dropped dramatically in the 1990s. NTX crop adopters accumulated close to three times more land than non-adopters in the 1980s. Although adopters are still accumulating more land than non-adopters in the 1990s, the gap between the two groups has narrowed substantially. Second, smaller adopters are no longer accumulating land at higher rates than their larger counterparts. In the 1980s the landholdings of smaller adopters grew significantly faster than those of the larger adopters, but this trend reversed itself in the 1990s. The advantages smallholders initially had in accumulating land may have been lost as a result of deteriorating agronomic conditions and volatile export markets. However, given adequate policy support, smallholders could indeed improve their socioeconomic position through cultivation of NTX crops and still prove to be viable economic agents in the country’s lucrative export market.
Static quark anti-quark free and internal energy in 2-flavor QCD
Creators: name: Kaczmarek, Olaf
name: Zantow, Felix
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the change in free and internal energy due to the presence of a heavy quark anti-quark pair in a thermal heat bath in QCD with 2-flavors of staggered quarks at finite temperature. We discuss string breaking below as well as screening above the transition. Similarities and differences to the quenched case are discussed.
description: Talk by O.Kaczmarek at Hard Probes 2004, International Conference on Hard and Electromagnetic Probes of High Energy Nuclear Collisions, Nov. 4-10, 2004, Ericeira, Portugal, 4 pages, 5 figures, references corrected
Spectral analysis of a flat plasma sheet model
Creators: name: Bordag, M.
name: Pirozhenko, I. G.
name: Nesterenko, V. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The spectral analysis of the electromagnetic field on the background of a infinitely thin flat plasma layer is carried out. This model is loosely imitating a single base plane from graphite and it is of interest for theoretical studies of fullerenes. The model is naturally split into the TE-sector and TM-sector. Both the sectors have positive continuous spectra, but the TM-modes have in addition a bound state, namely, the surface plasmon. This analysis relies on the consideration of the scattering problem in the TE- and TM-sectors. The spectral zeta function and integrated heat kernel are constructed for different branches of the spectrum in an explicit form. As a preliminary, the rigorous procedure of integration over the continuous spectra is formulated by introducing the spectral densityin terms of the scattering phase shifts. The asymptotic expansion of the integrated heat kernel at small values of the evolution parameter is derived. By making use of the technique of integral equations, developed earlier by the same authors, the local heat kernel (Green's function or fundamental solution) is constructed also. As a by-product, a new method is demonstrated for deriving the fundamental solution to the heat conduction equation (or to the Schrödinger equation) on an infinite line with the $δ$-like source. In particular, for the heat conduction equation on an infinite line with the $δ$-source a nontrivial counterpart is found, namely, a spectral problem with point interaction, that possesses the same integrated heat kernel while the local heat kernels (fundamental solutions) in these spectral problems are different.
description: 19 pages, REVTeX4, one reference is added, the version published in J. Phys. A: Math. Gen
Rural Life and National Welfare
Creators: name: Taylor, Carl C.
Publisher: name: Unknown
Year: 1940
Subjects: Community/Rural/Urban Development
Labor and Human Capital

description: Excerpts: The importance of rural life in the national welfare is relatively greater than the proportion the farm population is of the national population, because each generation of farm people contributes more than its share of people to the next generation, and because agriculture produces more than its share of the primary necessities of life. Furthermore, farming as a way of life in actual behavior, and even more so in thought and philosophy, is a body of tradition accepted by millions of people who do not live on the farm. Psychologically, we are still a rural nation, although the rural population constitutes less than one-half, and the farm population less than one-fourth, of the total population. Our cities have been built to a very large extent, and are still being constantly replenished from the reservoir of farm population. Because we are in the habit of thinking that culture originates in and flows from cities, we are very likely to overlook the fact that there is a constant flow of people moving from farms to urban centers, taking with them habits and attitudes, customs, traditions, and a culture which are essentially rural.
description: Address, American Association of School Administrators, St. Louis, Missouri, February 27, 1940.
Axiomatizing relativistic dynamics without conservation postulates
Creators: name: Andreka, H.
name: Madarasz, J. X.
name: Nemeti, I.
name: Szekely, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Logic (math.LO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A part of relativistic dynamics (or mechanics) is axiomatized by simple and purely geometrical axioms formulated within first-order logic. A geometrical proof of the formula connecting relativistic and rest masses of bodies is presented, leading up to a geometric explanation of Einstein's famous $E=mc^2$. The connection of our geometrical axioms and the usual axioms on the conservation of mass, momentum and four-momentum is also investigated.
description: 21 pages, 7 figures
RAPID ASSESSMENTS IN URBAN AREAS: LESSONS FROM BANGLADESH AND TANZANIA
Creators: name: Garrett, James L.
name: Downen, Jeanne
name: Garrett, James L.
name: Downen, Jeanne
Publisher: name: Unknown
Year: 2001
Subjects: Community/Rural/Urban Development

description: An understanding of urban issues is extremely important for programming, especially for organizations that have traditionally focused on assisting poor households and communities in rural areas. Development organizations and governments frequently use rapid assessment methods because they have limited resources and little time to devote to longer-term, more complex research projects. Generally these methods employ qualitative techniques to solicit information from relatively small numbers of people. The size and diversity of the urban environment complicate the ability of these methods to generate a reliable, representative picture of urban livelihoods and the needs and constraints facing the urban poor. CARE’s experiences in Bangladesh and Tanzania suggest a number of ways that rapid assessment procedures can be strengthened to address these concerns. The experiences in Bangladesh and Tanzania suggest that the principal challenges to the validity of rapid assessments in urban areas, when used for exploratory purposes, can be met through use of representative samples; use of a number of qualitative and quantitative approaches; incorporation of team members who represent a variety of perspectives, knowledge areas, and professions; and linkages with local organizations and community members who are familiar with the economic, political, social, and cultural context of the city, to ensure local involvement and a local perspective.
Testing the equivalence principle on cosmological scales using the odd multipoles of galaxy cross-power spectrum and bispectrum
Creators: name: Umeh, Obinna
name: Koyama, Kazuya
name: Crittenden, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: One of the cornerstones of general relativity is the equivalence principle. However, the validity of the equivalence principle has only been established on solar system scales for standard matter fields; this result cannot be assumed to hold for the non-standard matter fields that dominate the gravitational dynamics on cosmological scales. Here we show how the equivalence principle may be tested on cosmological scales for non-standard matter fields using the odd multipoles of the galaxy cross-power spectrum and bispectrum. This test makes use of the imprint on the galaxy cross-power spectrum and bispectrum by the parity-violating general relativistic deformations of the past-light cone, and assumes that galaxies can be treated as test particles that are made of baryons and cold dark matter. This assumption leads to a non-zero galaxy-baryon relative velocity if the equivalence principle does not hold between baryons and dark matter. We show that the relative velocity can be constrained to be less than 28% of the galaxy velocity using the cross-power spectrum of the HI intensity mapping/H$α$ galaxy survey and the bispectrum of the H$α$ galaxy survey.
description: 26 pages, one appendix, 7 figures. Accepted to JCAP
Pselaphogenius undetermined
Creators: name: Löbl, Ivan
name: Kodada, Ján
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Pselaphogenius
Pselaphogenius undetermined

description: Pselaphogenius sp. Material examined. 2 ♀, NEPAL, Mechi Zone, Taplejung Distr., Ladza Kharka in Ladza Khola NW Walungchung Gola, 4100-4200 m, 21.-23.V.1988, dwarf Rhododendron creeping Juniperus, J. Martens & W. Schawaller (SMNS). Comments. This new species may easily be distinguished from P. baliyo by its frontal sulcusstrongly widened posteriad, much wider than the frontal carinae and approaching eyes, and the vertex with a deep median impression.
description: Published as part of Löbl, Ivan & Kodada, Ján, 2021, On the Himalayan Pselaphini (Insecta: Coleoptera: Staphylinidae: Pselaphinae), pp. 349-368 in Biodiversität und Naturausstattung im Himalaya VII, Erfurt :Naturkundemuseum on page 357, DOI: 10.5281/zenodo.5793818
Integer Division by Constants: Optimal Bounds
Creators: name: Lemire, Daniel
name: Bartlett, Colin
name: Kaser, Owen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: The integer division of a numerator n by a divisor d gives a quotient q and a remainder r. Optimizing compilers accelerate software by replacing the division of n by d with the division of c * n (or c * n + c) by m for convenient integers c and m chosen so that they approximate the reciprocal: c/m ~= 1/d. Such techniques are especially advantageous when m is chosen to be a power of two and when d is a constant so that c and m can be precomputed. The literature contains many bounds on the distance between c/m and the divisor d. Some of these bounds are optimally tight, while others are not. We present optimally tight bounds for quotient and remainder computations.
Universe scenarios from loop quantum cosmology
Creators: name: Bojowald, Martin
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Loop quantum cosmology is an application of recent developments for a non-perturbative and background independent quantization of gravity to a cosmological setting. Characteristic properties of the quantization such as discreteness of spatial geometry entail physical consequences for the structure of classical singularities as well as the evolution of the very early universe. While the singularity issue in general requires one to use difference equations for a wave function of the universe, phenomenological scenarios for the evolution are based on effective equations implementing the main quantum modifications. These equations show generic bounces as well as inflation in diverse models, which have been combined to more complicated scenarios.
description: 16 pages, 8 figures, plenary talk at "Pomeranian Workshop in Fundamental Cosmology", Pobierowo, Sep 2005
Running coupling of 2-flavor QCD at zero and finite temperature
Creators: name: Kaczmarek, Olaf
name: Zantow, Felix
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present lattice studies of the running coupling in 2-flavor QCD. The coupling at zero temperature (T=0) is extracted from Wilson loops while the coupling at finite temperature ($T\neq0$) is determined from Polyakov loop correlation functions.
description: Talk by F.Zantow at Hard Probes 2004, International Conference on Hard and Electromagnetic Probes of High Energy Nuclear Collisions, Nov. 4-10, 2004, Ericeira, Portugal, 4 pages, 5 figures, reference corrected
Anisotropy in Dijet Production in Exclusive and Inclusive Processes
Creators: name: Hatta, Yoshitaka
name: Xiao, Bo-Wen
name: Yuan, Feng
name: Zhou, Jian
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the effect of soft gluon radiations on the azimuthal angle correlation between the total and relative momenta of two jets in inclusive and exclusive dijet processes. We show that the final state effect induces a sizable $\cos(2ϕ)$ anisotropy due to gluon emissions near the jet cones. The phenomenological consequences of this observation are discussed for various collider experiments, including diffractive processes in ultraperipheral $pA$ and $AA$ collisions, inclusive and diffractive dijet production at the EIC, and inclusive dijet in $pp$ and $AA$ collisions at the LHC.
description: 7 pages, 4 figures
Self-Assembly of Isostatic Self-Dual Colloidal Crystals
Creators: name: Lei, Qun-Li
name: Zheng, Wei
name: Tang, Feng
name: Wan, Xiangang
name: Ni, Ran
name: Ma, Yuqiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Self-dual structures whose dual counterparts are themselves possess unique hidden symmetry, beyond the description of classical spatial symmetry groups. Here we propose a strategy based on { a nematic monolayer of} attractive half-cylindrical colloids to self-assemble these exotic structures. { This system can be seen as a 2D system of semi-disks.} By using Monte Carlo simulations, we discover two isostatic self-dual crystals, i.e., an unreported crystal with pmg {space-group} symmetry and the twisted Kagome crystal. For the pmg crystal approaching the critical point, we find the double degeneracy of the {full} phononic spectrum at the self-dual point, and the merging of two tilted Weyl nodes into one \emph{critically-tilted} Dirac node. The latter is `accidentally' located on the high-symmetry line. The formation of this unconventional Dirac node is due to the emergence of the critical flat bands at the self-dual point, which are linear combinations of \emph{finite-frequency} floppy modes. These modes can be understood as mechanically-coupled self-dual rhomb chains vibrating in some unique uncoupled ways. Our work paves the way for designing and fabricating self-dual materials with exotic mechanical or phononic properties.
description: 6 pages, 3 figures
Double field theory algebroid and curved $L_\infty$-algebras
Creators: name: Grewcoe, Clay James
name: Jonke, Larisa
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A DFT algebroid is a special case of the metric (or Vaisman) algebroid, shown to be relevant in understanding the symmetries of double field theory. In particular, a DFT algebroid is a structure defined on a vector bundle over doubled spacetime equipped with the C-bracket of double field theory. In this paper we give the definition of a DFT algebroid as a curved $L_\infty$-algebra and show how implementation of the strong constraint of double field theory can be formulated as an $L_\infty$-algebra morphism. Our results provide a useful step towards coordinate invariant descriptions of double field theory and the construction of the corresponding sigma-model.
description: 26 pages; v2: Minor modifications to match the published version, typo corrected
A Novel Estimator for the Equation of State of the IGM by Ly$α$ Forest Tomography
Creators: name: Müller, Hendrik
name: Behrens, Christoph
name: Marsh, David James Edward
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a novel procedure to estimate the Equation of State of the intergalactic medium in the quasi-linear regime of structure formation based on Ly$α$ forest tomography and apply it to 21 high quality quasar spectra from the UVES\_SQUAD survey at redshift $z=2.5$. Our estimation is based on a full tomographic inversion of the line of sight. We invert the data with two different inversion algorithms, the iterative Gauss-Newton method and the regularized probability conservation approach, which depend on different priors and compare the inversion results in flux space and in density space. In this way our method combines fitting of absorption profiles in flux space with an analysis of the recovered density distributions featuring prior knowledge of the matter distribution. Our estimates are more precise than existing estimates, in particular on small redshift bins. In particular, we model the temperature-density relation with a power law and observe for the temperature at mean density $T_0 = 13400^{+1700}_{-1300}\,\mathrm{K}$ and for the slope of the power-law (polytropic index) $γ= 1.42 \pm 0.11$ for the power-law parameters describing the temperature-density relation. Moreover, we measure an photoionization rate $Γ_{-12} = 1.1^{+0.16}_{-0.17}$. An implementation of the inversion techniques used will be made publicly available.
description: 20 pages, 25 figures, 4 tables, accepted for publication in MNRAS, a python toolkit containing our implementations is publicly available under this https URL https://github.com/hmuellergoe/reglyman
An intelligent location management algorithm for cellular systems
Creators: name: Koh, Jason Jae Hyun
Publisher: name: University of British Columbia
Year: 2009

description: With the explosive growth in the number of cellular subscribers in the past decade, cellular systems are faced with the challenge of increasing the efficiency of the usage of the limited frequency spectrum. The service providers are forced to use increasingly smaller cells to increase system capacity; however, smaller cell sizes result in higher signalling loads generated by location management procedures. The intelligent location management algorithm which utilizes the user profile of individual users is proposed. The user profile contains a history of the user's cell-to-cell transitions and the total time spent in a cell. Using this information, the intelligent algorithm generates location areas dynamically around the user in such a way that the mean location updating traffic is reduced, and pages within the location area in multiple steps such that the mean paging traffic is reduced by paging the most probable cells first. A user mobility model is proposed for the purpose of quantifying the performance results of location management algorithms. The proposed model, activity-based mobility model with directional random walk, simulates mobility behaviour patterns of users of different classes. Such a model which captures an individual user's daily movement pattern is important in properly evaluating location management algorithms that utilize user mobility history. Performance in terms of radio signalling is evaluated and compared with other location management algorithms such as the GSM and dynamic location management algorithms. The intelligent algorithm produces less radio signalling at the cost of increased memory storage and processing capabilities at the mobile station and network.
What Is County Planning? (As Seen by the United States Department of Agriculture and Its Action Agencies)
Creators: name: Young, Gladwin E.
Publisher: name: Unknown
Year: 1940
Subjects: Community/Rural/Urban Development
Land Economics/Use
Teaching/Communication/Extension/Profession

description: Excerpts: What I should like to give here today are my interpretations of what county planning is, as I think the United States Department of Agriculture sees it. County planning, as your program has called it, or agricultural land use planning, or agricultural planning, are generic terms for the concept of a process that is still evolutionary. Agricultural land use planning, as I shall call it in this paper, is not a project--it is an institution. It is a cooperative institution in the process of development. The organization and the ideals and objectives, even though their origins are deeply rooted, are not yet fully formulated. Perhaps the statement that agricultural land use planning is not a project should be qualified, in view of the fact that project agreements have been entered into with 45 States this year. The State Extension Services and Experiment Stations in these States entered into cooperative agreements for work in agricultural land use planning with the bureau of Agricultural Economics acting as "a staff agency of the Secretary in its general planning work". These project agreements and memoranda of understanding, however, represent organizational features of what I am describing as the institution of agricultural land use planning.
description: Address, Mid-West Sociological Society, Des Moines, Iowa, April 19, 1940.
Quasiparticle model for deconfined matter and the nucleation of hadrons
Creators: name: Bessa, A.
name: Fraga, E. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Assuming a first-order chiral transition scenario, we study the process of phase conversion driven by homogeneous nucleation. We adopt a quasiparticle model whose parameters are fit to lattice QCD data to describe the pressure at high temperature in the deconfined sector, and a bag model equation of state for pions in the low-temperature sector. We compute the critical radius and nucleation rate in the thin-wall approximation, and compare the results to the ones obtained using the bag model and the linear $σ$ model.
description: LaTeX, 4 pages, 4 figures, Contribution to the Proceedings of Quark Matter 05
Botschaft des Patriarchen Pimen von Moskau und Ganz-Rußland und Heiligen Synods der Russischen Orthodoxen Kirche an den Zentralausschuß des Ökumenischen Rates der Kirchen
Creators: name: Pimen, Moskau
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 22 Nr. 4 (1973): Ökumenische Rundschau, Band 22, Heft 4
Anyonic Excitations in Fast Rotating Bose Gases Revisited
Creators: name: Lakhoua, A.
name: Lassaut, M.
name: Masson, T.
name: Wallet, J. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The role of anyonic excitations in fast rotating harmonically trapped Bose gases in a fractional Quantum Hall state is examined. Standard Chern-Simons anyons as well as "non standard" anyons obtained from a statistical interaction having Maxwell-Chern-Simons dynamics and suitable non minimal coupling to matter are considered. Their respective ability to stabilize attractive Bose gases under fast rotation in the thermodynamical limit is studied. Stability can be obtained for standard anyons while for non standard anyons, stability requires that the range of the corresponding statistical interaction does not exceed the typical wavelenght of the atoms.
description: 5 pages. Improved version to be published in Phys. Rev. A, including a physical discussion on relevant interactions and scattering regime together with implication on the nature of statistical interaction
Creation and evolution of roughness on silica under unlubricated wear
Creators: name: Pham-Ba, Son
name: Molinari, Jean-François
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Friction and wear are important phenomena occurring in all devices with moving parts. While their origin and the way they evolve over time are not fully understood, they are both intimately linked to surface roughness. Guided by pin-on-disc experiments, we present the steps giving rise to the formation of surface roughness on silica, first by the creation of roughly spherical wear particles whose size is related to a critical length scale governing the transition between ductile and brittle behavior, then by the accumulation of these small particles into a larger third body layer, or gouge. We show that, for the explored range of loading conditions, the surface roughness evolves toward a common steady state under unlubricated wear regardless of the initial surface roughness, hinting toward the possible predictability of roughness evolution in wearing components. The friction coefficient is shown to be related to the surface roughness and its time evolution is discussed as well.
description: 12 pages, 10 figures, published in Wear
Pselaphotrichus undetermined
Creators: name: Löbl, Ivan
name: Kodada, Ján
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Pselaphotrichus
Pselaphotrichus undetermined

description: Pselaphotrichus sp. Material examined. 1 ♀, INDIA, W. Bengal, Darjeeling District, 13 km Ghoom, road to Bijanbari, degraded forest, 1500 m, 15.X.1978, C. Besuchet & I. LÖbl (MHNG).
description: Published as part of Löbl, Ivan & Kodada, Ján, 2021, On the Himalayan Pselaphini (Insecta: Coleoptera: Staphylinidae: Pselaphinae), pp. 349-368 in Biodiversität und Naturausstattung im Himalaya VII, Erfurt :Naturkundemuseum on page 358, DOI: 10.5281/zenodo.5793818
On supersymmetry breaking and the Dijkgraaf-Vafa conjecture
Creators: name: Girardello, L.
name: Mariotti, A.
name: Tartaglino-Mazzucchelli, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the Dijkgraaf-Vafa proposal when supersymmetry is broken. We consider U(N) SYM with chiral adjoint matter where the coupling constants in the tree-level superpotential are promoted to chiral spurions. The holomorphic part of the low-energy glueball superpotential can still be analyzed. We compute the holomorphic supersymmetry breaking contributions using methods of the geometry underlying the N=1 effective gauge theory viewed as a Whitham system. We also study the change in the effective glueball superpotential using perturbative supergraph techniques in the presence of spurions.
description: 24 pages, LaTeX; minor changes, one reference added, version to appear in JHEP
Precision Livestock Farming: A Technological Revolution in Agriculture
Creators: name: Dr. Rahul Kumar Meena1, Dr. Rohitash Kumar2
Publisher: name: trends in Agriculture Science
Year: 2024

description: Introduction

            The use of cutting-edge technologies is drastically changing the landscape of agriculture. Precision Livestock farming (PLF) is one such ground-breaking idea that is significantly advancing contemporary agricultural techniques. This creative method makes use of a variety of technology, including as automation, data analytics, and sensors, to maximize productivity, maintain animal welfare, and manage livestock. The complexities of precision livestock farming are thoroughly examined in this article, along with its underlying technology, advantages, disadvantages, and prospective implications for sustainable agriculture in the future.
Deep Conditional Transformation Models
Creators: name: Baumann, Philipp F. M.
name: Hothorn, Torsten
name: Rügamer, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Learning the cumulative distribution function (CDF) of an outcome variable conditional on a set of features remains challenging, especially in high-dimensional settings. Conditional transformation models provide a semi-parametric approach that allows to model a large class of conditional CDFs without an explicit parametric distribution assumption and with only a few parameters. Existing estimation approaches within this class are, however, either limited in their complexity and applicability to unstructured data sources such as images or text, lack interpretability, or are restricted to certain types of outcomes. We close this gap by introducing the class of deep conditional transformation models which unifies existing approaches and allows to learn both interpretable (non-)linear model terms and more complex neural network predictors in one holistic framework. To this end we propose a novel network architecture, provide details on different model definitions and derive suitable constraints as well as network regularization terms. We demonstrate the efficacy of our approach through numerical experiments and applications.
Note on 2d binary operadic harmonic oscillator
Creators: name: Paal, Eugen
name: Virkepu, Jyri
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 18D50, 70G60

description: It is explained how the time evolution of the operadic variables may be introduced. As an example, a 2-dimensional binary operadic Lax representation of the harmonic oscillator is found.
description: 5 pages, LaTex2e, presented at the International Conference "Algebra, Geometry, and Mathematical Physics", Gotheburg, Sweden, October 11-13, 2007
SIMPSON fitting routine for REDOR and shifted-REDOR
Creators: name: Dasgupta, Rubin
name: B.S.S, Karthick
name: , Derek
name: , Marcellus
name: Huub, J.M.
Publisher: name: Zenodo
Year: 2021

description: This is the REDOR and shifted-REDOR fitting code in SIMPSON along with SIMMOL routine. This is related to the publication titled "Dipolar dephasing for structure determination in a paramagnetic environment" https://doi.org/10.1016/j.ssnmr.2021.101728.
Heat transport in Bi_{2+x}Sr_{2-x}CuO_{6+δ}: departure from the Wiedemann-Franz law in the vicinity of the metal-insulator transition
Creators: name: Proust, Cyril
name: Behnia, Kamran
name: Bel, Romain
name: Maude, Duncan
name: Vedeneev, S. I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a study of heat transport in the cuprate superconductor Bi_{2+x}Sr_{2-x}CuO_{6+δ} at subkelvin temperatures and in magnetic fields as high as 25T. In several samples with different doping levels close to optimal, the linear-temperature term of thermal conductivity was measured both at zero-field and in presence of a magnetic field strong enough to quench superconductivity. The zero-field data yields a superconducting gap of reasonable magnitude displaying a doping dependence similar to the one reported in other families of cuprate. The normal-state data together with the results of the resistivity measurements allows us to test the Wiedemann-Franz(WF) law, the validity of which was confirmed in an overdoped sample in agreement with previous studies. In contrast, a systematic deviation from the WF law was resolved for samples displaying either a lower doping content or a higher disorder. Thus, in the vicinity of the metal-insulator cross-over, heat conduction in the zero-temperature limit appears to become significantly larger than predicted by the WF law. Possible origins of this observation are discussed.
description: 9 pages including 7 figures, submitted to Phys. Rev. B
Circuit Design for $k$-coloring Problem and Its Implementation on Near-term Quantum Devices
Creators: name: Saha, Amit
name: Saha, Debasri
name: Chakrabarti, Amlan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: Nowadays in Quantum Computing, the implementation of quantum algorithm has created a stir since Noisy Intermediate-Scale Quantum (NISQ) devices are out in the market. Researchers are mostly interested in solving NP-complete problems with the help of quantum algorithms for its speed-up. As per the work on computational complexity by Karp \cite{karp}, if any of the NP-complete problem can be solved then any other NP-complete problem can be reduced to that problem in polynomial time. In this Paper, $k$-coloring problem (NP-complete problem) has been considered to solve using Grover's search. A comparator-based approach has been used to implement $k$-coloring problem which enables the reduction of the qubit cost compared to the state-of-the-art. An end-to-end automated framework has been proposed to implement the $k$-coloring problem for any unweighted and undirected graph on any available Noisy Intermediate-Scale Quantum (NISQ) devices, which helps in generalizing our approach.
description: 6 pages, 15 figures
Erklärung des Ökumenischen Patriarchats zum fünfundzwanzigjährigen Bestehen des Ökumenischen Rates der Kirchen
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 22 Nr. 4 (1973): Ökumenische Rundschau, Band 22, Heft 4
What Affects Consumption Patterns of Organic and Conventional Products?
Creators: name: Grebitus, Carola
name: Yue, Chengyan
name: Bruhn, Maike
name: Jensen, Helen H.
name: Grebitus, Carola
name: Yue, Chengyan
name: Bruhn, Maike
name: Jensen, Helen H.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: perceived quality
subject: consumption patterns
subject: fresh food
subject: organic
subject: ordered logit model

description: Consumers show an increased interest in organic food today and a willingness to pay premium for organic products. In addition to price, changing attitudes and beliefs about food quality affect food choice. This article analyses the impact of attitudes, quality characteristics and socio-demographics on consumption of organic and conventional pork, potatoes and milk. The concept of 'perceived quality' provides the theoretical background. The data come from a consumer survey conducted in Germany in 2004 (n=260). An ordered logit model was used for analysing the data. We observe clear differences in consumers' use of certain quality characteristics as they perceive and evaluate conventional and organic fresh foods.
Experimental Synchronization of Independent Entangled Photon Sources
Creators: name: Yang, Tao
name: Zhang, Qiang
name: Chen, Teng-Yun
name: Lu, Shan
name: Yin, Juan
name: Pan, Jian-Wei
name: Wei, Zhi-Yi
name: Tian, Jing-Rong
name: Zhang, Jie
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Realistic linear quantum information processing necessitates the ability to synchronously generate entangled photon pairs either at the same or at distant locations. Here, we report the experimental realization of synchronized generation of independent entangled photon pairs. The quality of synchronization is confirmed by observing a violation of Bell's inequality with 3.2 standard deviations in an entanglement swapping experiment. The techniques developed in our experiment will be of great importance for future linear optical realization of quantum repeaters and quantum computation.
description: 4pages, 3 figures
Motional $N$-phonon Bundle States of A Trapped Atom with Clock Transitions
Creators: name: Deng, Yuangang
name: Shi, Tao
name: Yi, Su
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum manipulation of individual phonons could offer new resources for studying fundamental physics and creating an innovative platform in quantum information science. Here, we propose to generate quantum states of strongly correlated phonon bundles associated with the motion of a trapped atom. Our scheme operates in the atom-phonon resonance regime where the energy spectrum exhibits strong anharmonicity such that energy eigenstates with different phonon numbers can be well-resolved in the parameter space. Compared to earlier schemes operating in the far dispersive regime, the bundle states generated here contain a large steady-state phonon number. Therefore, the proposed system can be used as a high quality multiphonon source. Our results open up the possibility of using long-lived motional phonons as quantum resources, which could provide a broad physics community for applications in quantum metrology.
description: 17 pages, 4+4 figures
"LINGUISTIC INSIGHTS INTO QURANIC AND HADITH DISCOURSE: A STUDY OF LEXICAL CHOICES AND CULTURAL IMPLICATIONS"
Creators: name: Ortiqova, Dilnoza
Publisher: name: Zenodo
Year: 2024

description: This thesis investigates the linguistic intricacies and cultural implications embedded within Quranic and Hadith texts. It explores how language shapes religious concepts and how cultural contexts influence the interpretation and understanding of these foundational Islamic texts. By analyzing key lexical units and their semantic potentials, this study aims to highlight the dynamic interplay between language, culture, and religious thought in the Muslim world. Furthermore, it emphasizes the importance of linguistic analysis as a crucial tool for uncovering the depths of meaning within the Quran and Hadith, paving the way for greater appreciation and comprehension of these texts in contemporary discourse.
Valuing Attributes of Fluid Milk Using Choice-Based Conjoint Experimental Design
Creators: name: Bai, Junfei
name: Wahl, Thomas I.
name: Wandschneider, Philip R.
name: Bai, Junfei
name: Wahl, Thomas I.
name: Wandschneider, Philip R.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Demand and Price Analysis
subject: China
subject: choice-based conjoint
subject: consumer economics
subject: milk attributes
subject: multinomial logit model

description: A choice-based conjoint (CBC) experiment was employed to analyze Chinese consumers' preferences for fluid milk defined by four choice attributes: production processing method, fat content level, taste, and price. The results from two analysis approaches (counting and multinomial logit models) indicated that Chinese consumers are willing to pay a premium for pasteurized, low fat content, and natural tasting milk, but that they require a discount for choosing ultra high temperature (UHT), high fat content, and flavored milk. In addition, this study estimated the trade-offs among attributes' levels and simulated the effects of income on the probabilities of choosing attribute-specified milk.
Massive star formation in the central regions of spiral galaxies
Creators: name: Knapen, J. H.
name: Mazzuca, L. M.
name: Boeker, T.
name: Shlosman, I.
name: Colina, L.
name: Combes, F.
name: Axon, D. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: The morphology of massive star formation in the central regions of galaxies is an important tracer of the dynamical processes that govern the evolution of disk, bulge, and nuclear activity. Aims: We present optical imaging of the central regions of a sample of 73 spiral galaxies in the H alpha line and in optical broad bands, and derive information on the morphology of massive star formation. Methods: We obtained images with the William Herschel Telescope, mostly at a spatial resolution of below one second of arc. For most galaxies, no H alpha imaging is available in the literature. We outline the observing and data reduction procedures, list basic properties, and present the I-band and continuum-subtracted H alpha images. We classify the morphology of the nuclear and circumnuclear H alpha emission and explore trends with host galaxy parameters. Results: We confirm that late-type galaxies have a patchy circumnuclear appearance in H alpha, and that nuclear rings occur primarily in spiral types Sa-Sbc. We identify a number of previously unknown nuclear rings, and confirm that nuclear rings are predominantly hosted by barred galaxies. Conclusions: Other than in stimulating nuclear rings, bars do not influence the relative strength of the nuclear H alpha peak, nor the circumnuclear H alpha morphology. Even though our selection criteria led to an over-abundance of galaxies with close massive companions, we do not find any significant influence of the presence or absence of a close companion on the relative strength of the nuclear H alpha peak, nor on the H alpha morphology around the nucleus.
description: Accepted for publication in Astronomy & Astrophysics. 11 Pages latex, 3 postscript figures, 7 jpeg panels forming Fig. 1b-h