cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Local number variances and hyperuniformity of the Heisenberg family of determinantal point processes
Creators: name: Matsui, Takato
name: Katori, Makoto
name: Shirai, Tomoyuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The bulk scaling limit of eigenvalue distribution on the complex plane ${\mathbb{C}}$ of the complex Ginibre random matrices provides a determinantal point process (DPP). This point process is a typical example of disordered hyperuniform system characterized by an anomalous suppression of large-scale density fluctuations. As extensions of the Ginibre DPP, we consider a family of DPPs defined on the $D$-dimensional complex spaces ${\mathbb{C}}$, $D \in {\mathbb{N}}$, in which the Ginibre DPP is realized when $D=1$. This one-parameter family ($D \in {\mathbb{N}}$) of DPPs is called the Heisenberg family, since the correlation kernels are identified with the Szegő kernels for the reduced Heisenberg group. For each $D$, using the modified Bessel functions, an exact and useful expression is shown for the local number variance of points included in a ball with radius $R$ in ${\mathbb{R}}^{2D} \simeq {\mathbb{C}}^D$. We prove that any DPP in the Heisenberg family is in the hyperuniform state of Class I, in the sense that the number variance behaves as $R^{2D-1}$ as $R \to \infty$. Our exact results provide asymptotic expansions of the number variances in large $R$.
description: v3: 24 pages, no figure, revised for publication in J. Phys. A: Math. Theor
DER BEITRAG ERNEUERBARER ENERGIEN ZUM KLIMASCHUTZ EINE OKONOMISCH-OKOLOGISCHE ANALYSE FUR DIE LANDWIRTSCHAFT VON NIEDERSACHSEN (German)
Creators: name: Angenendt, Elisabeth
name: Triebe, Steffen
name: Zeddies, Jurgen
name: Angenendt, Elisabeth
name: Triebe, Steffen
name: Zeddies, Jurgen
Publisher: name: Unknown
Year: 2007
Subjects: subject: Substitutionspotenzial
subject: Einkommenseffekte
subject: Regionalmodell

description: Die Landwirtschaft kann durch die Produktion von Biomasse einen positiven Beitrag zu den nationalen Klimaschutzzielen leisten. Eine Analyse mit dem ökonomisch-ökologische Regionalmodell EFEM (Economic Farm Emission Model) hat gezeigt, dass durch den Anbau nachwachsender Rohstoffe und die alternative Verwendung von Getreidestroh sowie durch weitere Managementmassnahmen bei der Pflanzenproduktion die Treibhausgasemissionen in Niedersachsen gegenüber dem Referenzjahr um bis zu 60 % reduziert und die landesweiten Deckungsbeiträge um rund 7,2 % (140 C/ha) gesteigert werden können.
Prestrain-induced bandgap tuning in 3D-printed tensegrity-inspired lattice structures
Creators: name: Pajunen, Kirsti
name: Celli, Paolo
name: Daraio, Chiara
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this letter, we provide experimental evidence of bandgap tunability with global prestrain in additively-manufactured tensegrity-inspired lattice structures. These lattices are extremely lightweight and designed to exhibit a nonlinear compressive response that mimics that of a tensegrity structure. We fabricate them out of a stiff polymer but, owing to their peculiar design, they are compliant and remain elastic up to high levels of precompression. In turn, unlike tunable metamaterials made of soft polymers, the response of our lattices is not dominated by damping. We perform experiments on a one-dimensional lattice subject to longitudinal wave excitation and varying levels of static longitudinal precompression, and observe continuous tuning of both the wave speed and the location and width of the lowest-frequency bandgap.
MIGRAINE
Creators: name: Mukhitdinova, Ezozakhon
name: Abdulazizov, Mukhammadjon
name: Djuraeva, Barno
Publisher: name: Zenodo
Year: 2024

description: This article delves into the intricate world of migraines, a prevalent neurological disorder characterized by recurrent, severe headaches. From understanding the underlying mechanisms and triggers to exploring treatment options and lifestyle modifications, the article provides a comprehensive overview. Aimed at both sufferers and those seeking insights into this debilitating condition, it serves as a valuable resource for navigating the complexities of migraines. Special attention is given to emerging research and holistic approaches that contribute to a deeper understanding of this often-misunderstood disorder.
Clustering and collision of inertial particles in random velocity fields
Creators: name: Olla, Piero
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The influence of clustering on the collision rate of inertial particles in a smooth random velocity field, mimicking the smaller scales of a turbulent flow, is analyzed. For small values of the the ratio between the relaxation time of the particle velocity and the characteristic time of the field, the effect of clusters is to make more energetic collisions less likely. The result is independent of the flow dimensionality and is due only to the origin of collisions in the process of caustic formation.
description: 4 pages, 3 figures, revtex4
Impact of LHC Higgs couplings measurements on bosonic decays of the neutral Higgs sector in the scNMSSM
Creators: name: Telba, Marwa
name: Binjonaid, Maien
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the Next-to-minimal supersymmetric standard model with Grand unification boundary conditions under current theoretical and experimental constraints. We compute the mass spectrum of the model and focus on the three lightest particles in the Higgs sector (two CP-even scalars, $h_1, h_2$, and one CP-odd, $a_1$). The reduced couplings of such particles, singlet-doublet components, their branching ratios to bosons, and reduced cross-section to photons and massive gauge bosons via gluon fusion are thoroughly and systematically scrutinized. Our analysis is focused on the parameter space where the singlet-doublet coupling $λ$ is as large as possible (keeping the perturbativity bound intact) and the ratio between the vacuum expectation values of the up-type and down-type Higgses ($\tanβ$) is as small as possible, which is the region representing the most natural case of the NMSSM. We show the impact of recent constraints from the LHC on the SM-Higgs couplings to bosons and fermions on the parameter space of the model and the consequent implications on the Higgs sector. The results show that while the model is still able to account for current data and provide an opportunity for discovery of extended Higgs sectors, recent LHC Higgs couplings constraints rule-out parts of the parameter space where $h_2$ (non-SM-like) and $a_1$ are non-singlet with masses below ~400 GeV.
description: MPLA accepted version
SU(4) versus SU(2) Kondo effect in double quantum dot
Creators: name: Chudnovskiy, A. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the spin and orbital Kondo effect in a parallel arrangement of two strongly electrostatically coupled quantum dots. Increasing the exchange of electrons between the dots through the attached leads induces the transition between the SU(4) spin- and orbital Kondo effect and SU(2) spin Kondo effect. Being the same for the SU(4) and SU(2) symmetry points, the Kondo temperature drops slightly in the intermediate regime. Experimentally, two kinds of Kondo effects can be discriminated by the sensitivity to the suppression of the spin Kondo effect by Zeeman field. The dependence of Kondo temperature on Zeeman field and the strength of electronic exchange mediated by the leads is analyzed in detail.
description: 5 pages, 3 figures. Consideration extended to include finite orbital magnetic fields. References added, typos corrected
The Montevideo Interpretation: How the inclusion of a Quantum Gravitational Notion of Time Solves the Measurement Problem
Creators: name: Gambini, Rodolfo
name: Pullin, Jorge
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We review the Montevideo Interpretation of quantum mechanics, which is based on the use of real clocks to describe physics, using the framework recently introduced by Hoehn, Smith and Lock to treat the problem of time in generally covariant systems. The use of the new formalism makes the whole construction more accessible to readers without familiarity with totally constrained systems. We find that as in the original formulation, a fundamental mechanism of decoherence emerges that allows to supplement ordinary environmental decoherence and avoid its criticisms. Recent results on quantum complexity provide additional support to the type of global protocols used to prove that within ordinary -- unitary -- quantum mechanics no definite event -- an outcome to which a probability can be associated -- occurs. In lieu of this, states that start in a coherent superposition of possible outcomes always remain as a superposition. We show that, if one takes into account fundamental inescapable uncertainties in measuring length and time intervals due to general relativity and quantum mechanics, the previously mentioned global protocols no longer allow to distinguish whether the state is in a superposition or not. One is left with a formulation of quantum mechanics purely defined in quantum mechanical terms without any reference to the classical world and with an intrinsic operational definition of quantum events that does not need external observers.
description: 11 pages, RevTex, no figures, published version
Analytic series expansion of the overlap reduction function for gravitational wave search with pulsar timing arrays
Creators: name: Boîtier, Adrian
name: Tiwari, Shubhanshu
name: Jetzer, Philippe
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In our previous paper \cite{PTA1} we derived a generic expression for the pulse redshift the main observable for the Pulsar Timing Array (PTA) experiment for detection of gravitational waves for all possible polarizations induced by modifications of general relativity (GR). In this work we provide a generic expression of the overlap reduction function for PTA without using the short wavelength approximation for tensorial polarization. We are convinced, that the short wavelength approximation is not applicable to the overlap reduction function for PTA's, since the removal of the exponential terms in the integrand would lead to poles for $x, y$ and $l$ polarizations and discontinuities for $+$ and $\times$. In this work we provide a series expansion to calculate the integral exactly and investigate the behaviour of the series for short wavelength values via numerical evaluation of the analytical series. We find a disagreement for the limit of co-located pulsars with the Hellings \& Downs curve.
description: Supplemental material is attached in the main text and Mathematica notebooks are also attached in the source
IJTIMOIY FANLARNI O'QITISHDA ELEKTRON TA'LIMNING AHAMIYATI
Creators: name: Xasanov Abdushohid Abdurashidovich, Muzaffarova Umida Fasliddin qizi
Publisher: name: Zenodo
Year: 2025

description: Annotatsiya: Ushbu maqolada ijtimoiy fanlarni o‘qitishda elektron ta’limning ahamiyati,  ijtimoiy jarayonlarning globallashuvi jarayonida axborot texnologiyalarining rivojlanishi, ta’lim tizimini rivojlantirishning istiqbolli, innovatsion pedagogik izlanishlar va talabaning individual, talabaga yo‘naltirilgan ta’lim maqsadiga universitetning virtual makonida o‘quv jarayonlari to‘g‘risidagi ma’lumotlar keltirilgan.
Local cosmic string and C-field
Creators: name: Rahaman, F.
name: Mondal, R.
name: Kalam, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate a local cosmic string with a phenomenological energy momentum tensor as prescribed by Vilenkin, in presence of C-field . The solutions of full nonlinear Einstein's equations for exterior and interior regions of such a string are presented.
description: 7 pages
Analysis of landscape hierarchy during coarsening and aging in Ising spin glasses
Creators: name: Boettcher, Stefan
name: Rahman, Mahajabin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We use record dynamics (RD), a coarse-grained description of the ubiquitous relaxation phenomenology known as "aging", as a diagnostic tool to find universal features that distinguish between the energy landscapes of Ising spin models and the ferromagnet. According to RD, a non-equilibrium system after a quench relies on fluctuations that randomly generate a sequence of irreversible record-sized events (quakes or avalanches) that allow the system to escape ever-higher barriers of meta-stable states within a complex, hierarchical energy landscape. Once these record events allow the system to overcome such barriers, the system relaxes by tumbling into the following meta-stable state that is marginally more stable. Within this framework, a clear distinction can be drawn between the coarsening dynamics of an Ising ferromagnet and the aging of the spin glass, which are often put in the same category. To that end, we interpolate between the spin glass and ferromagnet by varying the admixture $p$ of ferromagnetic over anti-ferromagnetic bonds from the glassy state (at 50% each) to wherever clear ferromagnetic behavior emerges. The accumulation of record events grows logarithmic with time in the glassy regime, with a sharp transition at a specific admixture into the ferromagnetic regime where such activations saturate quickly. We show this effect both for the Edwards-Anderson model on a cubic lattice as well as the Sherrington-Kirkpatrick (mean-field) spin glass. While this transition coincides with a previously observed zero-temperature equilibrium transition in the former, that transition has not yet been described for the latter.
description: 8 pages, RevTex4, some improved explanations, related information can be found at http://www.physics.emory.edu/faculty/boettcher/
Phantom depth and stable phantom exactness
Creators: name: Epstein, Neil M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13A35 (Primary) 13C15, 13D25 (Secondary)

description: Phantom depth, phantom nonzerodivisors, and phantom exact sequences are analogues of the non-"phantom" notions which have been useful in tackling the (very difficult) localization problem in tight closure theory. In the present paper, these notions are developed further and partially reworked. For instance, although no analogue of a long exact sequence arises from a short stably phantom exact sequence of complexes, we provide a method for recovering the kind of information obtainable from such a long sequence. Also, we give alternate characterizations of the notion of phantom depth, including one based on Koszul homology which we use to show that with very mild conditions on a finitely generated module $M$, any two maximal phantom $M$-regular sequences in an ideal $I$ have the same length. In order to do so, we prove a "Nakayama lemma for tight closure" which is of independent interest. We strengthen the connection of phantom depth with minheight, we explore several analogues of "associated prime" in tight closure theory, and we discuss a connection with the problem of when tight closure commutes with localization.
description: 35 pages
The Training Catalogue for Photon and Neutron Data Services
Creators: name: Knodel, Oliver
name: Konrad, Uwe
name: Valcarcel-Orti, Ana
name: Padovani, Antoine
Publisher: name: Zenodo
Year: 2022
Subjects: training
photon science
neutron science
e-learning
catalogue

description: Education is becoming an increasingly important topic to help scientists work on photon and neutron sources. Other relevant areas such as advanced quantum technologies will also play a key role in the future. One of the goals of ExPaNDS (European Open Science Cloud (EOSC) Photon and Neutron Data Service) is to train research scientists in order to better understand the issues, methods and available computational RI infrastructures to address critical research questions. Our PaN-training catalogue provides a one-stop shop for trainers and trainees to discover online information and content: For trainers the catalogue offers an environment for sharing materials and event information. For trainees, it offers a convenient gateway via which to identify relevant training events and resources, and to perform specific, guided analysis tasks via training workflows to provide FAIR research.
The Training Catalogue for Photon and Neutron Data Services
Creators: name: Knodel, Oliver
name: Konrad, Uwe
name: Valcarcel-Orti, Ana
name: Padovani, Antoine
Publisher: name: Zenodo
Year: 2023
Subjects: training
photon science
neutron science
e-learning
catalogue

description: Education is becoming an increasingly important topic to help scientists work on photon and neutron sources. Other relevant areas such as advanced quantum technologies will also play a key role in the future.

One of the goals of ExPaNDS (European Open Science Cloud (EOSC) Photon and Neutron Data Service) is to train research scientists in order to better understand the issues, methods and available computational RI infrastructures to address critical research questions. 

Our PaN-training catalogue provides a one-stop shop for trainers and trainees to discover online information and content: 

For trainers the catalogue offers an environment for sharing materials and event information.

For trainees, it offers a convenient gateway via which to identify relevant training events and resources, and to perform specific, guided analysis tasks via training workflows to provide FAIR research.
Normal approximations for descents and inversions of permutations of multisets
Creators: name: Conger, Mark
name: Viswanath, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Normal approximations for descents and inversions of permutations of the set $\{1,2,...,n\}$ are well known. A number of sequences that occur in practice, such as the human genome and other genomes, contain many repeated elements. Motivated by such examples, we consider the number of inversions of a permutation $π(1), π(2),...,π(n)$ of a multiset with $n$ elements, which is the number of pairs $(i,j)$ with $1\leq i < j \leq n$ and $π(i)>π(j)$. The number of descents is the number of $i$ in the range $1\leq i < n$ such that $π(i) > π(i+1)$. We prove that, appropriately normalized, the distribution of both inversions and descents of a random permutation of the multiset approaches the normal distribution as $n\to\infty$, provided that the permutation is equally likely to be any possible permutation of the multiset and no element occurs more than $αn$ times in the multiset for a fixed $α$ with $0
Tailored Coupled Cluster Theory in Varying Correlation Regimes
Creators: name: Mörchen, Maximilian
name: Freitag, Leon
name: Reiher, Markus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The tailored coupled cluster (TCC) approach is a promising ansatz that preserves the simplicity of single-reference coupled cluster theory, while incorporating a multi-reference wave function through amplitudes obtained from a preceding multi-configurational calculation. Here, we present a detailed analysis of the TCC wave function based on model systems, which require an accurate description of both static and dynamic correlation. We investigate the reliability of the TCC approach with respect to the exact wave function. In addition to the error in the electronic energy and standard coupled cluster diagnostics, we exploit the overlap of TCC and full configuration interaction wave functions as a quality measure. We critically review issues such as the required size of the active space, size-consistency, symmetry breaking in the wave function, and the dependence of TCC on the reference wave function. We observe that possible errors caused by symmetry breaking can be mitigated by employing the determinant with the largest weight in the active space as reference for the TCC calculation. We find the TCC model to be promising in calculations with active orbital spaces which include all orbitals with a large single-orbital entropy, even if the active spaces become very large and then may require modern active-space approaches that are not restricted to comparatively small numbers of orbitals. Furthermore, utilizing large active spaces can improve on the TCC wave-function approximation and reduce the size-consistency error, because the presence of highly excited determinants affects the accuracy of the coefficients of low-excited determinants in the active space.
description: 38 pages, 14 figures
The distribution of local fluxes in porous media
Creators: name: Araújo, Ascânio D.
name: Bastos, Wagner B.
name: Andrade, José S.
name: Herrmann, Hans J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the distributions of channel openings, local fluxes, and velocities in a two-dimensional random medium of non-overlapping disks. We present theoretical arguments supported by numerical data of high precision and find scaling laws as function of the porosity. For the channel openings we observe a crossover to a highly correlated regime at small porosities. The distribution of velocities through these channels scales with the square of the porosity. The fluxes turn out to be the convolution of velocity and channel width corrected by a geometrical factor. Furthermore, while the distribution of velocities follows a Gaussian, the fluxes are distributed according to a stretched exponential with exponent 1/2. Finally, our scaling analysis allows to express the tortuosity and pore shape factors from the Kozeny-Carman equation as direct average properties from microscopic quantities related to the geometry as well as the flow through the disordered porous medium.
description: 4 pages, 4 figures, submitted to PRL
Dairy Quota and Farm Structural Change: A Case Study on the Netherlands
Creators: name: Jongeneel, Roelof A.
name: Tonini, Axel
name: Jongeneel, Roelof A.
name: Tonini, Axel
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: Livestock Production/Industries
subject: Research Methods/ Statistical Methods
subject: dairy
subject: farm size
subject: Netherlands
subject: Markov chain
subject: generalized cross entropy

description: This paper sets out to analyse the impact of milk quotas had on the dairy farm structure of the Netherlands. In addition projections on the likely farm structure under different milk quota scenarios are explored. Moreover mobility indicators characterizing structural change are developed and calculated. A Markov probability model is estimated relying on a generalized cross entropy approach. The introduction of milk quotas as of April 1, 1984 froze the dairy farm structural adjustment, at least initially. However, later on mobility started to increase, which is likely to reflect the quota tradability and lease possibilities. Moreover there is evidence that the milk quota regime has increased concentration of dairy production among farms with 50-69 cows. If after quota abolition the dairy farm structural dynamics would be the same as in the 1972-83 period, then quota abolition in 2015 will lead to a substantial increase in the number of farms in 2022 as compared to the current status quo.
FARM-LEVEL DATA MODEL FOR AGRICULTURAL POLICY ANALYSIS: A TWO-WAY ECM APPROACH
Creators: name: Sckokai, Paolo
name: Moro, Daniele
name: Platoni, Silvia
name: Sckokai, Paolo
name: Moro, Daniele
name: Platoni, Silvia
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Research Methods/ Statistical Methods
subject: Agricultural policy
subject: Panel data
subject: Systems of equations

description: Econometric models wishing to estimate relevant parameters for agricultural policy analysis are increasingly relying on unbalanced panels of farm-level data. Since in the agricultural economics literature such models have often been estimated through simplified approaches, in this paper we try to verify whether the adoption of more sophisticated panel data techniques may impact the estimation results. For this reason, the policy model by Moro and Sckokai (1999) has been re-estimated using techniques recently developed in the econometric literature. The preliminary results show a strong impact on the estimations. This seems to suggest that the adoption of proper panel-data techniques is likely to be very important in order to obtain reliable estimates of some key policy parameters.
Theologische Ausbildung in Australien: Die United Faculty of Theology, Melbourne ; eine Skizze ihrer Entstehung und inneren Struktur
Creators: name: Hamm, Peter
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 33 Nr. 4 (1984): Ökumenische Rundschau, Band 33, Heft 4
Transcription of the narration of Reel #1 (collection LA 256)
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio files VP-190317-02 and VP-190317-03: transcription of VP-180317-03 (narration of Reel #1 from the LA 256 collection at SCOIL, one of six reels of 8mm film created by Verdena in the 1960s, featuring scenes of everyday life around Hoopa Valley as well as Brush Dances). From start to 3:24 (VP-190317-02) and from 3:24 to 6:05 (VP-190317-03). Due to re-numbering, Reel #1 has been assigned the CLA item number LA 256.040.
A new $B$-flavour anomaly in $B_{d,s}\to K^{*0}\bar{K}^{*0}$: anatomy and interpretation
Creators: name: Algueró, Marcel
name: Crivellin, Andreas
name: Descotes-Genon, Sébastien
name: Matias, Joaquim
name: Novoa-Brunet, Martín
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the context of the recently measured non-leptonic decays $B_{d}\to K^{*0}\bar{K}^{*0}$ and $B_{s}\to K^{*0}\bar{K}^{*0}$ we analyse the anatomy of the $L_{VV}$ observable that compares the longitudinal components of $B_s \to VV$ and $B_d \to VV$ decays. This observable is cleaner than the longitudinal polarisation fraction as it is afflicted only at subleading order in a $1/m_b$ expansion by the theoretical uncertainties arising in the transverse components entering the polarisation fraction. Focusing on the particular case of $B_{d}\to K^{*0}\bar{K}^{*0}$ and $B_{s}\to K^{*0}\bar{K}^{*0}$, we discuss the main sources of hadronic uncertainty in the SM. We find for the SM prediction $L_{K^*\bar{K}^*}=19.5^{+9.3}_{-6.8}$, which implies a $2.6σ$ tension with respect to the most recent data, pointing to a deficit in the $b \to s$ transition of the non-leptonic decay versus the corresponding $b \to d$ transition. We discuss possible New Physics explanations for this deviation, first at the level of the Weak Effective Theory and we identify that the two Wilson coefficients ${\cal C}_{4}$ and ${\cal C}_{8g}$ can play a central role in explaining this anomaly. Finally, we briefly explore two different simplified New Physics models which can explain the anomaly through a contribution either in ${\cal C}_4$ (Kaluza-Klein gluon) or in ${\cal C}_{8g}$, with a significant amount of fine tuning, but possible connections to the $b \to s \ell \ell$ anomalies.
description: Final version to appear in JHEP. 25 pages, 5 figures
Gamma-rays from binary system with energetic pulsar and Be star with aspherical wind: PSR B1259-63/SS2883
Creators: name: Sierpowska-Bartosik, Agnieszka
name: Bednarek, Wlodek
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: At least one massive binary system containing an energetic pulsar, PSR B1259-63/SS2883, has been recently detected in the TeV gamma-rays by the HESS telescopes. These gamma-rays are likely produced by particles accelerated in the vicinity of the pulsar and/or at the pulsar wind shock, in comptonization of soft radiation from the massive star. However, the process of gamma-ray production in such systems can be quite complicated due to the anisotropy of the radiation field, complex structure of the pulsar wind termination shock and possible absorption of produced gamma-rays which might initiate leptonic cascades. In this paper we consider in detail all these effects. We calculate the gamma-ray light curves and spectra for different geometries of the binary system PSR B1259-63/SS2883 and compare them with the TeV gamma-ray observations. We conclude that the leptonic IC model, which takes into account the complex structure of the pulsar wind shock due to the aspherical wind of the massive star, can explain the details of the observed gamma-ray light curve.
description: 12 pages, 11 figures, accepted for publication in MNRAS
Defining elasticities for PMP models by estimating marginal cost functions based on FADN Data - the case of Swiss dairy production
Creators: name: Mack, Gabriele
name: Mann, Stefan
name: Mack, Gabriele
name: Mann, Stefan
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: Livestock Production/Industries
subject: Marginal cost function
subject: milk production costs
subject: PMP-based sectoral model

description: The Swiss agricultural sectoral information and forecasting system (SILAS) is based on the PMP standard approach. The marginal cost functions are estimated by exogenous elasticities. Due to the lack of empirical data the elasticities were set for all activities to unity. Based on total milk production costs of FADN farms, regional supply functions were estimated. The results are used to adjust the marginal cost functions of organic and non-organic dairy cow activities in the model SILAS to the empirically estimated functions. The results show that the marginal cost functions in the sectoral model are in general a bit steeper than in the FADN estimations, when elasticities by the value one are applied. Major differences between organic and non-organic milk production could not be observed. Adjusting the slope of the marginal cost functions to the empirically estimated ones leads to slightly different forecast results. Mainly the number of organic cows is higher in the FADN adjusted scenario than in the reference scenario without any adjustments.
การประยุกต์ใช้แอปพลิเคชัน WhatsApp สำหรับการเรียนภาษาไทยในฐานะภาษาต่างประเทศ
Creators: name: สุรีเนตร จรัสจรุงเกียรติ
Publisher: name: คณะศิลปศาสตร์ มหาวิทยาลัยธรรมศาสตร์
Year: 2017
Subjects: การเรียนรู้แบบร่วมกัน
เทคโนโลยีการศึกษา
การเรียนรู้ผ่านอุปกรณ์สื่อสารเคลื่อนที่
ภาษาไทย

description: วรรณวิทัศน์, 17, พฤศจิกายน, 251-268
Electroweak Restoration at the LHC and Beyond: The $Vh$ Channel
Creators: name: Huang, Li
name: Lane, Samuel D.
name: Lewis, Ian M.
name: Liu, Zhen
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The LHC is exploring electroweak (EW) physics at the scale EW symmetry is broken. As the LHC and new high energy colliders push our understanding of the Standard Model to ever-higher energies, it will be possible to probe not only the breaking of but also the restoration of EW symmetry. We propose to observe EW restoration in double EW boson production via the convergence of the Goldstone boson equivalence theorem. This convergence is most easily measured in the vector boson plus Higgs production, $Vh$, which is dominated by the longitudinal polarizations. We define EW restoration by carefully taking the limit of zero Higgs vacuum expectation value (vev). EW restoration is then measured through the ratio of the $p_T^h$ distributions between $Vh$ production in the Standard Model and Goldstone boson plus Higgs production in the zero vev theory, where $p_T^h$ is the Higgs transverse momentum. As EW symmetry is restored, this ratio converges to one at high energy. We present a method to extract this ratio from collider data. With a full signal and background analysis, we demonstrate that the 14 TeV HL-LHC can confirm that this ratio converges to one to 40% precision while at the 27 TeV HE-LHC the precision will be 6%. We also investigate statistical tests to quantify the convergence at high energies. Our analysis provides a roadmap for how to stress test the Goldstone boson equivalence theorem and our understanding of spontaneously broken symmetries, in addition to confirming the restoration of EW symmetry.
description: References updated, discussion clarified. Version accepted by PRD. 36 pages, 6 figures
The Continuum Potts Model at the Disorder-Order Transition -- a Study by Cluster Dynamics
Creators: name: Georgii, Hans-Otto
name: Lorinczi, Jozsef
name: Lukkarinen, Jani M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences
subject: 60K35, 82B21 (Primary), 65C40, 82B26 (Secondary)

description: We investigate the continuum q-Potts model at its transition point from the disordered to the ordered regime, with particular emphasis on the coexistence of disordered and ordered phases in the high-q case. We argue that occurrence of phase transition can be seen as percolation in the related random cluster representation, similarly to the lattice Potts model, and investigate the typical structure of clusters for high q. We also report on numerical simulations in two dimensions using a continuum version of the Swendsen-Wang algorithm, compare the results with earlier simulations which used the invaded cluster algorithm, and discuss implications on the geometry of clusters in the disordered and ordered phases.
description: 24 pages, 16 figures
MODELLING ECONOMIC ALTERNATIVES FOR TOBACCO PRODUCERS: THE CASE OF SHEEP FARMING
Creators: name: Tzouramani, Irene
name: Karanikolas, Pavlos
name: Alexopoulos, George
name: Sintori, Alexandra
name: Liontakis, Angelos E.
name: Tzouramani, Irene
name: Karanikolas, Pavlos
name: Alexopoulos, George
name: Sintori, Alexandra
name: Liontakis, Angelos E.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: Livestock Production/Industries
subject: Risk and Uncertainty
subject: organic farming
subject: dairy sheep
subject: risk analysis
subject: SERF
subject: agricultural policy

description: After the introduction of the new tobacco regime, many regions in Greece, formerly specialized in tobacco cultivation, are now facing serious threats of economic and social decline. Sheep farming is considered by many analysts as a viable alternative to tobacco. This study analyses the financial performance of sheep production and the risk that producers are taking. Through a stochastic efficiency analysis with respect to a function we explore the economic viability of conventional and organic sheep farming; key factors determining the economic outcome of these activities are also investigated. Both organic and conventional sheep farming appear as viable alternatives. The viability of organic farming lies, mainly, in organic payments. Conventional farming generates a slightly lower but less uncertain net return.
Anomalous wave propagation in quasiisotropic media
Creators: name: Luo, Hailu
name: Shu, Weixing
name: Li, Fei
name: Ren, Zhongzhou
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Based on boundary conditions and dispersion relations, the anomalous propagation of waves incident from regular isotropic media into quasiisotropic media is investigated. It is found that the anomalous negative refraction, anomalous total reflection and oblique total transmission can occur in the interface associated with quasiisotropic media. The Brewster angles of E- and H-polarized waves in quasiisotropic media are also discussed. It is shown that the propagation properties of waves in quasiisotropic media are significantly different from those in isotropic and anisotropic media.
description: 15 pages, 4 figures
The non-monotonic, strong metallicity dependence of the wide-binary fraction
Creators: name: Hwang, Hsiang-Chih
name: Ting, Yuan-Sen
name: Schlaufman, Kevin C.
name: Zakamska, Nadia L.
name: Wyse, Rosemary F. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The metallicity dependence of the wide-binary fraction in stellar populations plays a critical role in resolving the open question of wide binary formation. In this paper, we investigate the metallicity ([Fe/H]) and age dependence of the wide-binary fraction (binary separations between $10^3$ and $10^4$ AU) for field F and G dwarfs within 500 pc by combining their metallicity and radial velocity measurements from LAMOST DR5 with the astrometric information from Gaia DR2. We show that the wide-binary fraction strongly depends on the metallicity: as metallicity increases, the wide-binary fraction first increases, peaks at [Fe/H]$\simeq 0$, and then decreases at the high metallicity end. The wide-binary fraction at [Fe/H]$=0$ is about two times larger than that at [Fe/H]$=-1$ and [Fe/H]$=+0.5$. This metallicity dependence is dominated by the thin-disk stars. Using stellar kinematics as a proxy of stellar age, we show that younger stars have a higher wide-binary fraction at fixed metallicity close to solar. We propose that multiple formation channels are responsible for the metallicity and age dependence. In particular, the positive metallicity correlation at [Fe/H]$<0$ and the age dependence may be due to the denser formation environments and higher-mass clusters at earlier times. The negative metallicity correlation at [Fe/H]$>0$ can be inherited from the similar metallicity dependence of close binaries, and radial migration may play a role in enhancing the wide-binary fraction around the solar metallicity.
description: Accepted by MNRAS. Fig 3 and 7 are the key results
MODELLING IMPORT DEMAND SYSTEMS WITH NONSTATIONARY DATA: AN APPLICATION TO THE FRENCH IMPORTS OF VIRGIN OLIVE OIL
Creators: name: Ben Kaabia, Monia
name: Gil, Jose Maria
name: Ben Kaabia, Monia
name: Gil, Jose Maria
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: International Relations/Trade
subject: Research Methods/ Statistical Methods
subject: Virgin olive oil
subject: France
subject: demand for imports
subject: cointegration
subject: and exogeneity.

description: This paper aims to provide a flexible methodological framework to estimate import demand models, which explicitly considers the stochastic properties of data and the endogenous/exogenous nature of some variables. The French imports of virgin olive oil have been used as a case study with Spain, Italy and the Rest of the World as main suppliers. The methodological framework starts by the specification a reduced-form VAR. Appropriated exogeneity tests show the exogeneity of Total Real Imports, indicating the appropriateness of estimating a conditional model. Two cointegration relationships have been found. Several restrictions have been tested in order to identify them as AIDS equations. From structural coefficients of the restricted cointegrated vectors expenditure, own- and cross-prices elasticities are computed. Results show the leadership of Spanish exports to the French market. Italian exports compete in the French market with the Spanish exports, being highly dependent on Spanish domestic production conditions.
DOPING: a New Non-parametric Deprojection Scheme
Creators: name: Chakrabarty, Dalia
name: Ferrarese, Laura
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new non-parametric deprojection algorithm DOPING (Deprojection of Observed Photometry using and INverse Gambit), that is designed to extract the three dimensional luminosity density distribution $ρ$, from the observed surface brightness profile of an astrophysical system such as a galaxy or a galaxy cluster, in a generalised geometry, while taking into account changes in the intrinsic shape of the system. The observable is the 2-D surface brightness distribution of the system. While the deprojection schemes presented hitherto have always worked within the limits of an assumed intrinsic geometry, in DOPING, geometry and inclination can be provided as inputs. The $ρ$ that is most likely to project to the observed brightness data is sought; the maximisation of the likelihood is performed with the Metropolis algorithm. Unless the likelihood function is maximised, $ρ$ is tweaked in shape and amplitude, while maintaining positivity, but otherwise the luminosity distribution is allowed to be completely free-form. Tests and applications of the algorithm are discussed.
description: 8 pages; to be published in IJMP(D) (Feb, 2008 issue), Vol 17, No. 2, as part of proceedings for the 6th International Workshop on Data Analysis in Astronomy, ``Modelling and Simulations in Science''
Modelling the Hungarian Agriculture: a methodological overview of the FARM-T model
Creators: name: Himics, Mihaly
name: Himics, Mihaly
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: Research Methods/ Statistical Methods
subject: FARM-T
subject: partial equilibrium model
subject: farm groups

description: This paper provides an opportunity for the reader to get an insight into the current modelling work at the Research Institute for Agricultural Economics, Hungary (AKI). After giving a short summary of the applied econometric models in the past decade, our latest development, the farm group model FARM-T will be introduced. Before introducing FARM-T in details, we devote the second part of the paper to collect all the major challenges we faced during the model development process, when we tried to establish a model structure, with which the possible effects of the introduction of the Single Payment Scheme (SPS) in Hungary can be properly estimated. Therefore, this chapter is meant to explain our motivation for choosing the applied model concept. In the following part of the paper, we provide a detailed introduction into the model. First, we describe the general structure, and then we go into the details about supply and demand sides. We lay an emphasis on the supply side, and especially how the agricultural production is represented by farm groups. After describing supply and demand sides, we focus on how the equilibrium is reached. Here, we discuss the interrelationships between sectors in more details (e.g. connection between crop and livestock production). We also stress the importance of regionally differentiated export and import markets. This enables us to take the various transportation modes, distances and market positions on different external markets into account. Finally, we discuss special model building issues related to the 2003 CAP reform, especially how the effects of decoupling of direct payments from production are estimated. We close this paper with a short summary of the problems concerned.
Nanoscale spin detection of copper ions using double electron-electron resonance at room temperature
Creators: name: Zhang, Kai
name: Ghosh, Shreya
name: Saxena, Sunil
name: Dutt, M. V. Gurudev
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the nanoscale spin detection and electron paramagnetic resonance (EPR) spectrum of copper (Cu$^{2+}$) ions via double electron-electron resonance with single spins in diamond at room temperature and low magnetic fields. We measure unexpectedly narrow EPR resonances with linewidths $\sim 2-3$ MHz from copper-chloride molecules dissolved in poly-lysine. We also observe coherent Rabi oscillations and hyperfine splitting from single Cu$^{2+}$ ions, which could be used for dynamic nuclear spin polarization and higher sensitivity of spin detection. We interpret and analyze these observations using both spin hamiltonian modeling of the copper-chloride molecules and numerical simulations of the predicted DEER response, and obtain a sensing volume $\sim (250 \text{nm})^3$. This work will open the door for copper-labeled EPR measurements under ambient conditions in bio-molecules and nano-materials.
description: 28 pages, 9 figures, revised ms
Agri-environmental schemes in the European Union: the role of ex ante costs
Creators: name: Peerlings, Jack H.M.
name: Polman, Nico B.P.
name: Peerlings, Jack H.M.
name: Polman, Nico B.P.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: Agri-environmental contracts
subject: transaction costs
subject: contract choice

description: The purpose of this paper is to analyse land allocation between competing agri-environmental contracts taking into account institutional issues and farm household and farm characteristics. We consider a Biodiversity Protection Contract, Landscape Management Contract and a Restriction on Intensive Practises Contract. The paper shows that it is important to study the choice for an agrienvironmental contract in combination with the choice for other agri-environmental contracts. The reasons being that a unit of land can only be allocated to one contract (although a farm can select more than one contract) and perceived relative marginal costs of contracts can change if institutional settings and farm household and farm characteristics alter. The model uses a two stage method. In the first step the probability of contract choice is determined. In the second stage these probabilities are linked to ex ante costs (including transaction costs) and optimal contract choice is determined.
Afrikanische Theologie im Spannungsfeld von Abhängigkeit und Befreiung
Creators: name: Kamphausen, Erhard
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 33 Nr. 4 (1984): Ökumenische Rundschau, Band 33, Heft 4