cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pair production due to an electric field in 1+1 dimensions and the validity of the semiclassical approximation
Creators: name: Pla, Silvia
name: Newsome, Ian M.
name: Link, Robert S.
name: Anderson, Paul R.
name: Navarro-Salas, Jose
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Solutions to the backreaction equation in 1+1-dimensional semiclassical electrodynamics are obtained and analyzed when considering a time-varying homogeneous electric field initially generated by a classical electric current, coupled to either a quantized scalar field or a quantized spin-$\frac{1}{2}$ field. Particle production by way of the Schwinger effect leads to backreaction effects that modulate the electric field strength. Details of the particle production process are investigated along with the transfer of energy between the electric field and the particles. The validity of the semiclassical approximation is also investigated using a criterion previously implemented for chaotic inflation and, in an earlier form, semiclassical gravity. The criterion states that the semiclassical approximation will break down if any linearized gauge-invariant quantity constructed from solutions to the linear response equation, with finite nonsingular data, grows rapidly for some period of time. Approximations to homogeneous solutions of the linear response equation are computed and it is found that the criterion is violated when the maximum value, $E_{\rm max}$, obtained by the electric field is of the order of the critical scale for the Schwinger effect, $E_{\rm max} \sim E_{\rm crit}\equiv m^2/q$, where $m$ is the mass of the quantized field and $q$ is its electric charge. For these approximate solutions the criterion appears to be satisfied in the extreme limits $\frac{qE_{\rm max}}{m^2} \ll 1$ and $\frac{qE_{\rm max}}{m^2} \gg 1$.
description: Change in the title, a significant amount of rewriting including some corrections, minor changes in some figures, removal of two figures, references added. Published version, 42 pages, 10 figures
Informality, Size, and Regulation: Theory and an Application to Egypt
Creators: name: Giugale, Marcelo M.
name: El-Diwany, Sherif
name: Giugale, Marcelo M.
name: El-Diwany, Sherif
Publisher: name: Unknown
Year: 1997
Subjects: subject: Agricultural and Food Policy
subject: Informality
subject: Size Regulation
subject: Egypt
subject: Hide-Outs

description: The paper shows how, when the enforceability of regulations is size-sensitive, price competition can lock firms into informality and, thus, smallness, depending on the form of the production function. In that context, exogenours "help"packages targeted to informal firms "promote" micro and small enterprises (i.e., increase their numbers) but do not "develop" them (i.e., foster their growth). The "help" only generates a short-term span of abnormal profits for existing informal firms, and a long-term income transfer toward informal-market consumers. The model is tested in the context of Egypt's micro and small enterprise sector.
Targeting EGFR with molecular degraders as a promising strategy to overcome resistance to EGFR inhibitors
Creators: name: Wang, Qiangfeng
name: Zhu, Yumeng
name: Pei, Junping
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Medicine
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: Abnormal activation of EGFR is often associated with various malignant tumors, making it an important target for antitumor therapy. However, traditional targeted inhibitors have several limitations, such as drug resistance and side effects. Many studies have focused on the development of EGFR degraders to overcome this resistance and enhance the therapeutic effect on tumors. Proteolysis targeting chimeras (PROTAC) and Lysosome-based degradation techniques have made significant progress in degrading EGFR. This review provides a summary of the structural and function of EGFR, the resistance, particularly the research progress and activity of EGFR degraders via the proteasome and lysosome. Furthermore, this review aims to provide insights for the development of the novel EGFR degraders. Targeted protein degradation (TPD) is a novel mechanism for tumor-targeted therapy that differs from traditional small molecule inhibitors. EGFR belongs to the ErbB/HER receptor family. Activated EGFR regulates associated cellular processes by influencing downstream signaling pathways. The drugs currently targeting EGFR in clinical treatment of tumors mainly include TKIs and EGFR macromolecular drugs, including monoclonal antibodies, bispecific antibodies and ADCs, etc. The mechanism of EGFR resistance can be divided into two categories: primary resistance and acquired resistance. EGFR PROTACs can effectively degrade different EGFR mutants in various cells. Targeted EGFR degradation via lysosomes provides a new strategy for the development of the novel EGFR degraders. EGFR degraders provide a highly promising solution for the treatment of lung cancer and overcoming resistance to EGFR Inhibitors.
Coenen, Lothar (hrsg.): Theologisches Begriffslexikon zum Neuen Testament
Creators: name: Schulz, Otmar
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 20 Nr. 4 (1971): Ökumenische Rundschau, Band 20, Heft 4
Molecular docking, derivatization, characterization and biological assays of amantadine
Creators: name: Yasmeen, Zarmeena
name: Khan, Mohsin Abbas
name: Ahmad, Irshad
name: Ullah, Farhat
name: Awan, Breena
name: Akram, Muhammad Toseef
name: Khan, Muhammad Rizwan
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Background: Derivatization has been tremendously utilized in the field of drug discovery for optimizing the pharmacological properties and improving safety, efficacy and selectivity. Methodology: Schiff’s bases (AD1–AD11) are synthesized through amantadine condensation with different aldehydes and ketones. Fourier transform infrared, 1H NMR, 13C NMR, TLC, liquid chromatography mass spectrometry analysis, in silico studies, molecular docking and antiviral activity through hemagglutinin test were performed for evaluation of new compounds. Results: AD2, 3 and 9–11 showed greater antiviral activity than the parent drug. Among all derivatives, AD2 and AD3 exhibited good potential against α-amylase while AD7 and AD10 showed stronger inhibition against α-glucosidase. Conclusion: So, it is concluded that the most potent derivatives can be used as lead compounds in novel drug design of antiviral antidiabetic agents. Literature survey of amantadine derivatives having antidiabetic and antiviral activity and objective of research. Chemicals and instrumentation. General procedure for the synthesis of Schiff base derivatives of amantadine (AD1–AD11). Biological evaluation through in vitro studies. Antiviral assay. Hemagglutination test. α-amylase enzyme inhibition assay. Molecular docking studies. Physical and chemical characterization. Derivatives with excellent antiviral, α-amylase and α-glucosidase inhibition potential synthesized compounds as good candidates against both enzymes molecular docking studies. Utilization of new compounds against hepatitis A virus, Parkinson’s disease, as well as for other hyperglycemic disorders lead compound for diabetes as well as for viral infections.
AGRICULTURAL DEVELOPMENT AND PRO POOR ECONOMIC GROWTH IN SUB SAHARAN AFRICA: POTENTIAL AND POLICY
Creators: name: Kydd, Jonathan
name: Dorward, Andrew
name: Morrison, Jamie
name: Cadisch, Georg
name: Kydd, Jonathan
name: Dorward, Andrew
name: Morrison, Jamie
name: Cadisch, Georg
Publisher: name: Unknown
Year: 2002
Subjects: Food Security and Poverty
International Development

description: There is widespread concern at continuing, and indeed deepening, poverty in sub-Saharan Africa, and the lack of processes of rapid and broad based economic growth to combat this. There is also debate about the role agriculture in driving pro-poor economic growth with some arguing that it has a critical role in this while others see it is as largely irrelevant. This paper examines these arguments. We summarise and critique what we term the Washington Consensus on Agriculture (a consensus that appears to be eroding) and alternative positions opposing investment in agriculture. We suggest that both sets of arguments pay insufficient attention to important institutional issues in development, and, having taken these into account, we conclude that agriculture has a critical role to play, largely by default as there are no other candidates with the same potential for supporting broad based pro-poor growth. However, there are immense challenges to agricultural growth, challenges that in some cases may be too great to be economically viable. In considering economic viability, however, regard must be taken of the economic and social costs of rural stagnation and of providing safety nets in situations of enduring poverty. Policy needs to focus more on agriculture, and recognise and address the diversity of institutional, trade, technological and governance challenges to poverty reducing growth in Africa.
Effect of the Zero-Mode on the Response of a Trapped Bose-Condensed Gas
Creators: name: Mine, Makoto
name: Koide, Tomoi
name: Okumura, Masahiko
name: Yamanaka, Yoshiya
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The dynamical response of a trapped Bose-Einstein condensate (BEC) is formulated consistently with quantum field theory and is numerically evaluated. We regard the BEC as a manifestation of the breaking of the global phase symmetry. Then, the Goldstone theorem implies the existence of a zero energy excitation mode (the zero-mode). We calculate the effect of the zero-mode on the response frequency and show that the contribution of the zero-mode to the first excitation mode is not so important in the parameter set realized in the existing experiment. This is the reason that experimental results can be described using the Bogoliubov prescription, although it breaks the consistency of the description in quantum field theory.
description: 18 pages, 3 figures
Structured Assessment of PROtective Factors against Sexual Offending (SAPROF-SO) Version 1: Practitioner’s Workbook
Creators: name: Kelley, Sharon M.
name: Willis, Gwenda M.
name: Thornton, David
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 520103
subject: Forensic psychology
classificationCode: 440202
subject: Correctional theory, offender treatment and rehabilitation

description: The SAPROF-SO Practitioner’s Workbook includes frequently asked questions, descriptive normative data to help users better understand how their client compares to other individuals in the normative samples, and instructions on how to statistically integrate the results of the Static-99R and the SAPROF-SO to produce a probability of risk over the next five years.
INSTITUTIONAL DIMENSIONS OF TRADE LIBERALISATION AND POVERTY
Creators: name: Dorward, Andrew
name: Kydd, Jonathan
name: Poulton, Colin
name: Dorward, Andrew
name: Kydd, Jonathan
name: Poulton, Colin
Publisher: name: Unknown
Year: 2002
Subjects: Food Security and Poverty
International Relations/Trade

description: Trade policy liberalisation requires institutional change, in the sense of a change in the rules of the game. The question is whether these changes produce "superior institutions" judged in terms of a reduction of transactions costs; improved coordination; stronger strategic commitment to investing in needed specific assets; and allocative efficiency. In conventional approaches to the analysis of liberalisation, changed institutional arrangements are studied, but they tend to be considered in the category of "practical details": important but not especially intellectually interesting. In contrast, this paper argues for a parallel approach to the study of the effects of liberalisation on the rural poor, in which institutional matters are central. A broad range of institutional issues is considered, informed by a theoretical framework provided by the various strands within institutional economics. The framework set out and discussed leads to the contention that smallholder agriculture in poor countries needs coordinated market economy (CME) type institutions if it is to develop, at least at the earlier stages. Ideally, these would be based on deliberative institutions, working horizontally inside a sector, and also vertically along the supply chain. It is argued that the way forward is likely to involve a rethinking of the role of the state (at sub-national, national and international - aid donor - levels) and of the roles of producer organisations and other stakeholder (including trader) associations. The aim must be to find a way in which the state and other powerful actors can initiate deliberative processes and take a lead in encouraging appropriate asset specific investments, while at the same time planning to fade into the background as initial success is achieved. These conclusions challenge conventional analysis of trade policy liberalisation in poor countries and also challenge institutional specialists to provide insights, ideally quantifiable, into the consequences of those liberalisation policies which drive changes in such features as "non-standard institutional arrangements"; non-market coordination; and the roles of government.
Holographic Gravitational Anomalies
Creators: name: Kraus, Per
name: Larsen, Finn
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the AdS/CFT correspondence one encounters theories that are not invariant under diffeomorphisms. In the boundary theory this is a gravitational anomaly, and can arise in 4k+2 dimensions. In the bulk, there can be gravitational Chern-Simons terms which vary by a total derivative. We work out the holographic stress tensor for such theories, and demonstrate agreement between the bulk and boundary. Anomalies lead to novel effects, such as a nonzero angular momentum for global AdS(3). In string theory such Chern-Simons terms are known with exact coefficients. The resulting anomalies, combined with symmetries, imply corrections to the Bekenstein-Hawking entropy of black holes that agree exactly with the microscopic counting.
description: 25 pages
Numerical Study of the Chiral Separation Effect in Two-Color QCD at Finite Density
Creators: name: Buividovich, P. V.
name: Smith, D.
name: von Smekal, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the Chiral Separation Effect (CSE) in finite-density SU(2) lattice gauge theory with dynamical quarks. We find that the CSE is well described by the free quark result in the high-temperature quark-gluon plasma phase. As one enters the confinement regime with broken chiral symmetry at chemical potential smaller than half of the pion mass, the CSE response is gradually suppressed towards low temperatures in comparison to the free quark result. This suppression can be approximately described by assuming that the CSE current is proportional to the charge density, rather than the chemical potential, as suggested in the literature (ArXiv:1712.01256, Phys.Rev.D97(2018)085020). We also provide an upper bound on the contribution of disconnected fermionic diagrams to the CSE, which is consistent with zero within our statistical errors and small compared to that of the connected diagrams. Our results are obtained mainly in the QCD-like regime of SU(2) gauge theory at low densities, and hence should be at least qualitatively applicable to QCD as well.
description: v2: published version, 10 pages RevTeX, 6 figures
Numerical computation of high-order expansions of invariant manifolds of high-dimensional tori
Creators: name: Gimeno, Joan
name: Jorba, Àngel
name: Nicolás, Begoña
name: Olmedo, Estrella
Publisher: name: arXiv
Year: 2024
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Physics (physics.class-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper we present a procedure to compute reducible invariant tori and their stable and unstable manifolds in stroboscopic Poincaré maps. The method has two steps. In the first step we compute, by means of a quadratically convergent scheme, the Fourier series of the torus, its Floquet transformation, and its Floquet matrix. If the torus has stable and/or unstable directions, in the second step we compute the Taylor-Fourier expansions of the corresponding invariant manifolds up to a given order. The paper also discusses the case in which the torus is highly unstable so that a multiple shooting strategy is needed to compute the torus. If the order of the Taylor expansion of the manifolds is fixed and N is the number of Fourier modes, the whole computational effort (torus and manifolds) increases as O(N log N) q and the memory required behaves as O(N). This makes the algorithm very suitable to compute high-dimensional tori for which a huge number of Fourier modes are needed. Besides, the algorithm has a very high degree of parallelism. The paper includes examples where we compute invariant tori (of dimensions up to 5) of quasi-periodically forced ODEs. The computations are run in a parallel computer and its efficiency with respect to the number of processors is also discussed.
Cheilolejeunea norrisii M. A. M. Renner, Bryologist
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Cheilolejeunea
Cheilolejeunea norrisii

description: Cheilolejeunea norrisii (Grolle) M.A.M.Renner,
Bryologist 115 (4): 550, 2012 (see Renner 2012). BASIONYM: Lejeunea norrisii Grolle, Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Naturwiss. Reihe 31 (2): 215, 1982 (see Grolle 1982).
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 64, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
A POLICY AGENDA FOR PRO POOR AGRICULTURAL GROWTH
Creators: name: Dorward, Andrew
name: Kydd, Jonathan
name: Morrison, Jamie
name: Urey, Ian
name: Dorward, Andrew
name: Kydd, Jonathan
name: Morrison, Jamie
name: Urey, Ian
Publisher: name: Unknown
Year: 2002
Subjects: Food Security and Poverty
International Development

description: Economic growth has been low and the incidence and numbers of poor people remain very high in some parts of the world, notably in sub Saharan Africa and some parts of South Asia. Projections for poverty reduction suggest that these regions are likely to continue to hold very large numbers of very poor rural people in the foreseeable future. Theoretical arguments and empirical evidence suggest that in poor agrarian economies both the processes of structural change within national economies and micro-economic relations within rural economies give agriculture (and particularly intensive cereal based growth) a pre-eminent and unique role in economic development and in poverty reduction. However, reliance on pro-poor agricultural growth as the main weapon against rural poverty today faces more difficult challenges than those faced in the green revolution areas in the latter part of the 20th century, due to a number of features that together increase risk and uncertainty and raise costs and/or lower returns to agricultural investment. Many of these difficulties are endogenous to today's poor rural areas, others result from broader processes of global change, but it is argued that some are the direct result of policies supporting liberalisation and withdrawal of the state. A review of the green revolutions of the 20th century suggests that state interventions in agricultural markets were widely used and important in supporting sometimes short periods of critical market and technological development in the process of rural growth. Unfortunately the benefits of such interventions have been overlooked as a result of their very evident inefficiency and high costs, without a clear understanding of their institutional benefits. Policy and research implications of this analysis are discussed.
Pairing of a trapped resonantly-interacting fermion mixture with unequal spin populations
Creators: name: Haque, Masudul
name: Stoof, H. T. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We consider the phase separation of a trapped atomic mixture of fermions with unequal spin populations near a Feshbach resonance. In particular, we determine the density profile of the two spin states and compare with the recent experiments of Partridge et al. (cond-mat/0511752). Overall we find quite good agreement. We identify the remaining discrepancies and pose them as open problems.
description: 4 figures, 4+ pages, revtex4
Network experiment demonstrates converse symmetry breaking
Creators: name: Molnar, Ferenc
name: Nishikawa, Takashi
name: Motter, Adilson E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Symmetry breaking--the phenomenon in which the symmetry of a system is not inherited by its stable states--underlies pattern formation, superconductivity, and numerous other effects. Recent theoretical work has established the possibility of converse symmetry breaking (CSB), a phenomenon in which the stable states are symmetric only when the system itself is not. This includes scenarios in which interacting entities are required to be nonidentical in order to exhibit identical behavior, such as in reaching consensus. Here we present an experimental demonstration of this phenomenon. Using a network of alternating-current electromechanical oscillators, we show that their ability to achieve identical frequency synchronization is enhanced when the oscillators are tuned to be suitably nonidentical and that CSB persists for a range of noise levels. These results have implications for the optimization and control of network dynamics in a broad class of systems whose function benefits from harnessing uniform behavior.
description: Minor typo corrected in Eq. (2). All results and other equations remain unaffected. Summary video available at https://www.youtube.com/watch?v=TesgXXj8T8I
Fahlbusch, Erwin (hrsg.): Taschenlexikon Religion und Theologie
Creators: name: Müller-Römheld, Walter
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 20 Nr. 4 (1971): Ökumenische Rundschau, Band 20, Heft 4
A distinctive posterior mitral valve infective endocarditis and a large mycotic aneurysm
Creators: name: Alidrous, Fatma
name: Manjila, Ignatius
name: Balfe, Christopher
name: Kiernan, Thomas J.
name: Arnous, Samer
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences

description: Case presentationA 72-year-old man with a background of hypertension and atrial fibrillation presented with confusion, lumbar back pain and pyrexia. Clinical examination identified a pansystolic murmur radiating to the left axilla.
Excitability in a Model with a Saddle-Node Homoclinic Bifurcation
Creators: name: Dilao, Rui
name: Volford, Andras
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 45K57

description: In order to describe excitable reaction-diffusion systems, we derive a two-dimensional model with a Hopf and a semilocal saddle-node homoclinic bifurcation. This model gives the theoretical framework for the analysis of the saddle-node homoclinic bifurcation as observed in chemical experiments, and for the concepts of excitability and excitability threshold. We show that if diffusion drives an extended system across the excitability threshold then, depending on the initial conditions, wave trains, propagating solitary pulses and propagating pulse packets can exist in the same extended system. The extended model shows chemical turbulence for equal diffusion coefficients and presents all the known types of topologically distinct activity waves observed in chemical experiments. In particular, the approach presented here enables to design experiments in order to decide between excitable systems with sharp and finite width thresholds.
description: 18 pages, 7 figures
A phenomenological investigation of the experience of yoga in relation to the management of stress in one’s life
Creators: name: Brown, Kelly Angela
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was to examine the subjective experience of those individuals who practiced yoga in relation to the management of stress in their lives. A qualitative phenomenological methodology was used to guide the data collection and analysis. Data were collected through in-depth semistructured interviews with a volunteer sample of six participants. Participants were between the ages of 22 and 53 and their involvement with yoga ranged from 2 to 11 years of practice. Audio-taped interviews were transcribed verbatim and analyzed according to Colaizzi's (1978) method of phenomenological data analysis. Five common themes emerged from the data, which included the following experiences: (a) a heightened sense of bodily awareness; (b) a sense of being grounded, calm, and peaceful; (c) an enhanced awareness of self and the present moment; (d) an acceptance of self and life circumstances; and (e) a trust in the process of life. These findings led to specific recommendations for future research, and as well implications for the counselling profession.
RURAL AND FARMER FINANCE: AN INTERNATIONAL PERSPECTIVE
Creators: name: Dorward, Andrew
name: Poulton, Colin
name: Kydd, Jonathan
name: Dorward, Andrew
name: Poulton, Colin
name: Kydd, Jonathan
Publisher: name: Unknown
Year: 2001
Subjects: Agricultural Finance
Food Security and Poverty

description: A wide range of institutional models and financial products are currently serving, or attempting to serve, the poor's demands for savings and loan services. However, very few of these operate in lower density rural areas or in areas where there has not already been some agriculturally based growth in the rural economy, and virtually none are (a) operating in the conditions faced by the majority of poor farmers in sub Saharan Africa and (b) offering financial products that adequately address farmers' needs for seasonal finance for food crop production. This is partly due to the high costs and risks in the supply of such services, but may also reflect high risks and relatively low returns for borrowers investing in agriculture. However, loan products are often structured in ways that make them particularly unsuited to seasonal lending, unless households have access to alternative cash sources which are not related to agricultural seasonality. There has been a similar lack of interest in and development of micro-insurance services and products, and there appears to be very little in the literature on financial transmission services.
Two-boson truncation of Pauli-Villars-regulated Yukawa theory
Creators: name: Brodsky, S. J.
name: Hiller, J. R.
name: McCartor, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We apply light-front quantization, Pauli-Villars regularization, and numerical techniques to the nonperturbative solution of the dressed-fermion problem in Yukawa theory in 3+1 dimensions. The solution is developed as a Fock-state expansion truncated to include at most one fermion and two bosons. The basis includes a negative-metric heavy boson and a negative-metric heavy fermion in order to provide the necessary cancellations of ultraviolet divergences. The integral equations for the Fock-state wave functions are solved by reducing them to effective one-boson--one-fermion equations for eigenstates with J_z=1/2. The equations are converted to a matrix equation with a specially tuned quadrature scheme, and the lowest mass state is obtained by diagonalization. Various properties of the dressed-fermion state are then computed from the nonperturbative light-front wave functions. This work is a major step in our development of Pauli-Villars regularization for the nonperturbative solution of four-dimensional field theories and represents a significant advance in the numerical accuracy of such solutions.
description: 32 pages, 17 figures; requires elsart.cls
Time-dependent quantum harmonic oscillator: a continuous route from adiabatic to sudden changes
Creators: name: Martínez-Tibaduiza, D.
name: Pires, L.
name: Farina, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work, we provide an answer to the question: how sudden or adiabatic is a change in the frequency of a quantum harmonic oscillator (HO)? To do this, we investigate the behavior of a HO, initially in its fundamental state, by making a frequency transition that we can control how fast it occurs. The resulting state of the system is shown to be a vacuum squeezed state in two bases related by Bogoliubov transformations. We characterize the time evolution of the squeezing parameter in both bases and discuss its relation with adiabaticity by changing the rate of the frequency transition from sudden to adiabatic. Finally, we obtain an analytical approximate expression that relates squeezing to the transition rate as well as the initial and final frequencies. Our results shed some light on subtleties and common inaccuracies in the literature related to the interpretation of the adiabatic theorem for this system.
description: 12 pages, 3 Figures
Michigan: A State at the Intersection of the Debate over Full Planting Flexibility
Creators: name: Thornsbury, Suzanne
name: Martinez, Lourdes R.
name: Schweikhardt, David B.
name: Thornsbury, Suzanne
name: Martinez, Lourdes R.
name: Schweikhardt, David B.
Publisher: name: Unknown
Year: 2007
Subjects: Agricultural and Food Policy
Crop Production/Industries

description: Greater flexibility in U.S. farm programs with elimination of the restriction on the planting of fruit and vegetable crops (FAVR crops) is likely to be a major issue in congressional 2007 farm policy discussions. Michigan is a state with a wide range of both FAVR and program crops planted under the current policy. To capture the diversity of situations that would apply among of crops covered by the current policy, this research has examined a broad set of Michigan FAVR crops (dry beans, pickling cucumbers, processing tomatoes, fresh market tomatoes, squash, and blueberries). We evaluate both those factors that are likely to prevent the entry of DCP crop producers into the production of FAVR crops (barriers to entry or disincentives) and those factors that are likely to encourage DCP crop producers to enter the production of FAVR crops (inducements to entry or incentives). The balance will determine the likely outcome from elimination of the FAVR. With the exception of dry beans, a change in the FAVR would provide only small (or no) positive incentives for DCP crop producers to enter the production of FAVR crops. Similarly, barriers to entry would, in many cases, be high enough to significantly limit, or even prohibit, movement of DCP crop producers into the markets for FAVR crops. When considering these factors in combination, only dry beans appear to have the potential for entry of a significant number of new producers. In most other cases, the probability of entry by new producers appears to be low. Even with a low or zero response in total supply, equity issues will likely still arise.
Na$_x$CoO$_2$ in the x -> 0 Regime: Coupling of Structure and Correlation effects
Creators: name: Lee, K. -W.
name: Pickett, W. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The study of the strength of correlations in Na$_x$CoO$_2$ is extended to the x=0 end of the phase diagram where Mott insulating behavior has been widely anticipated. Inclusion of correlation as modeled by the LDA+U approach leads to a Mott transition in the $a_g$ subband if U is no less than U$_c$=2.5 eV. Thus U smaller than U$_c$ is required to model the metallic, nonmagnetic CoO$_2$ compound reported by Tarascon and coworkers. The orbital-selective Mott transition of the $a_g$ state, which is essentially degenerate with the $e'_{g}$ states, occurs because of the slightly wider bandwidth of the $a_g$ bands. The metal-insulator transition is found to be strongly coupled to the Co-O bond length, due to associated changes in the $t_{2g}$ bandwidth, but the largest effects occur only at a reduced oxygen height that lies below the equilibrium position.
description: 8 pages with 9 embedded figures
Regional Wholesale Price Relationships: The Case of Peaches
Creators: name: Aguilar, Cristobal
name: Raper, Kellie Curry
name: Thornsbury, Suzanne
name: Aguilar, Cristobal
name: Raper, Kellie Curry
name: Thornsbury, Suzanne
Publisher: name: Unknown
Year: 2005
Subjects: Demand and Price Analysis

description: An important characteristic of agricultural commodity markets is the extent to which those markets respond to price changes in related markets. Given a competitive market structure, the Law of One Price (LOP) postulates that spatial price relationships are determined by transfer cost1 among regions and that spatial arbitrage restores market equilibrium (Tomek and Robinson, 2003). Spatial price relationships are of particular relevance to farmers in designing market strategies. Measurements of spatial price relationships provide insights about the dynamics of price movements, thus increasing understanding of likely behavior of supply or demand areas in the market (Jordan and Van Sickle, 1998). For example, knowledge of which regions lead prices, the degree to which market shocks are transmitted via prices among regions, and the regional market reaction time can all be useful in designing market strategy. This study analyzes spatial wholesale price relationships for fresh U.S. peaches using vector autoregressive analysis (VAR) on weekly prices from the primary wholesale markets of four U.S. regions. Primary objectives of the study are: (1) to determine the degree of market segmentation as well as the direction and magnitude of market integration among regions, and (2) to evaluate the sensitivity of U.S. fresh peach wholesale markets to individual shocks in the five regions. The study is organized as follows. We first present an overview of the U.S. fresh peach sector. Next, the relevant methodology and data is described. Results and conclusions follow.
The nature of the molecular gas system in the core of NGC 1275
Creators: name: Wilman, R. J.
name: Edge, A. C.
name: Johnstone, R. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present near-infrared integral field spectroscopy of the central kiloparsec of NGC 1275 at the heart of the Perseus cluster of galaxies, obtained with the UIST IFU on UKIRT. The nuclear ro-vibrational H_2 emission is spatially resolved and is likely to originate approximately 50 pc from the active nucleus. The Pa-alpha emission is, by contrast, spatially unresolved. The requirements for thermal excitation of the H_2 by nuclear X-radiation, its kinematics on sub-arcsec scales, and its stability against self-gravity, together suggest that the observed H_2 is part of a clumpy disk rotating about the radio-jet axis. The sharp jump in H_2 velocity across the nucleus implies a black hole mass of 3.4E8 M(Solar), with a systematic error of 0.18 dex due to the uncertainty in the radio jet inclination. This agrees well with the value implied by the empirical correlation between black hole mass and stellar velocity dispersion for nearby elliptical galaxies, and is ~100 times the stellar mass in this region.
description: 10 pages, 7 figures; accepted by MNRAS
The neutron star inner crust: an empirical essay
Creators: name: Lopes, Luiz L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this work we study how the small contribution of the inner crust to the total equation of state (EoS) of a neutron star affects its mass-radius relation, focusing on the canonical mass of 1.4$M_\odot$. We build empirical EoS of the kind - $p = Kε^γ + b$ - in the range of 0.003 fm$^{-3}~
description: letter, Published version
Learning to Configure Mathematical Programming Solvers by Mathematical Programming
Creators: name: Iommazzo, Gabriele
name: D'Ambrosio, Claudia
name: Frangioni, Antonio
name: Liberti, Leo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optimization and Control (math.OC)
subject: Machine Learning (cs.LG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We discuss the issue of finding a good mathematical programming solver configuration for a particular instance of a given problem, and we propose a two-phase approach to solve it. In the first phase we learn the relationships between the instance, the configuration and the performance of the configured solver on the given instance. A specific difficulty of learning a good solver configuration is that parameter settings may not all be independent; this requires enforcing (hard) constraints, something that many widely used supervised learning methods cannot natively achieve. We tackle this issue in the second phase of our approach, where we use the learnt information to construct and solve an optimization problem having an explicit representation of the dependency/consistency constraints on the configuration parameter settings. We discuss computational results for two different instantiations of this approach on a unit commitment problem arising in the short-term planning of hydro valleys. We use logistic regression as the supervised learning methodology and consider CPLEX as the solver of interest.
Cheilolejeunea ornata C. J. Bastos, J. Bryol.
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Cheilolejeunea
Cheilolejeunea ornata

description: Cheilolejeunea ornata C.J.Bastos,
J. Bryol. 33 (1): 86, 2011 (see Bastos 2011).
TYPE: “ Brazil: Bahia, Igrapiúna, Michelin Ecological Reserve, 13°48′S, 39°10′W, Pacangê Forest fragment, 11 August 2006, C. Bastos 4681 (holotype, ALCB)”.
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 64, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
Michigan Tart Cherry Processors: Issues and Strategy
Creators: name: Martinez, Lourdes R.
name: Thornsbury, Suzanne
name: Martinez, Lourdes R.
name: Thornsbury, Suzanne
Publisher: name: Unknown
Year: 2006
Subjects: Agribusiness
Crop Production/Industries

description: Michigan accounts for approximately 70 percent of the total number of tart cherry processing firms in the U.S. Changes in preferences of consumers and increasing participation of global competitors are driving down demand for traditional tart cherry products and imposing new pressures on the U.S. industry, particularly in Michigan. The objective of this report is to document main characteristics of the tart cherry processing industry in Michigan; namely, business characteristics, category of products, supply sources, and market outlets. Also, the study aims to assess business strategies and future expectations for the industry in Michigan. Interviews with managers of tart cherry processing companies were conducted to document the objectives of this research. For the purpose of this project only processing companies that at the time of the interviews reported processing raw tart cherries were contacted. Nineteen firms were selected from the Cherry Marketing Institute 2003 Statistical Handbook (CMI, 2003) and contacted for personal interviews in 2004. The scope of the study allows the results to present an important description of the tart cherry processing industry in Michigan. Moreover, results are useful indicators of where the industry's current position and challenges that participants perceive will be the most important in the future.
Regular sequences of symmetric polynomials
Creators: name: Conca, Aldo
name: Krattenthaler, Christian
name: Watanabe, Junzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E05, 13P10, 11C08

description: Denote by p_k the k-th power sum symmetric polynomial n variables. The interpretation of the q-analogue of the binomial coefficient as Hilbert function leads us to discover that n consecutive power sums in n variables form a regular sequence. We consider then the following problem: describe the subsets n powersums forming a regular sequence. A necessary condition is that n! divides the product of the degrees of the elements. To find an easily verifiable sufficient condition turns out to be surprisingly difficult already in 3 variables. Given positive integers a
description: corrected a typo in Lemma 2.4(b)
Parity-Symmetry-Protected Bundle Emission
Creators: name: Bin, Qian
name: Wu, Ying
name: Lü, Xin-You
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate symmetry protected bundle emission in the cavity QED system under the ultrastrong coupling regime. Parity symmetry of Rabi model only permits the super-Rabi oscillations with periodic generation of even photons in cavity, which is realized by the laser driven flip of qubit and the parity conserved transitions induced by Rabi interaction. Combined with dissipation, only 2$n$-photon correlated emissions are allowed, and the corresponding purities are significantly enhanced by the parity symmetry, due to the almost perfect suppression of bundle emissions with odd correlated photons. The switching of bundle emissions between even and odd correlated photons can be controlled by manipulating the parity symmetry of system with an added magnetic field. This work extends multi-photon bundle emission to the ultrastrong coupling regime, and offers the prospect of exploring symmetry-protected multi-quanta physics.
description: 6 pages, 4 figures
Geometric Formulation for Partially Massless Fields
Creators: name: Skvortsov, E. D.
name: Vasiliev, M. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The manifestly gauge invariant formulation for free symmetric partially massless fields in $(A)dS_d$ is given in terms of gauge connections and linearized curvatures that take values in the irreducible representations of $(o(d-1,2)) o(d,1)$ described by two-row Young tableaux, in which the lengths of the first and second row are, respectively, associated with spin and depth of partial masslessness.
description: LaTeX, 42 pages. Published in Nucl. Phys. B
Global Quantum Thermometry
Creators: name: Rubio, Jesús
name: Anders, Janet
name: Correa, Luis A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: A paradigm shift in quantum thermometry is proposed. To date, thermometry has relied on local estimation, which is useful to reduce statistical fluctuations once the temperature is very well known. In order to estimate temperatures in cases where few measurement data or no substantial prior knowledge are available, we build instead a theory of global quantum thermometry. Based on scaling arguments, a mean logarithmic error is shown here to be the correct figure of merit for thermometry. Its full minimisation provides an operational and optimal rule to post-process measurements into a temperature reading, and it establishes a global precision limit. We apply these results to the simulated outcomes of measurements on a spin gas, finding that the local approach can lead to biased temperature estimates in cases where the global estimator converges to the true temperature. The global framework thus enables a reliable approach to data analysis in thermometry experiments.
description: 5 + 8 pages, 1 + 1 figures. Accepted in Physical Review Letters
Goertz, Hans-Jürgen (hrsg.): Die Mennoniten
Creators: name: Motel, Hans-Beat
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 20 Nr. 4 (1971): Ökumenische Rundschau, Band 20, Heft 4
Cheilolejeunea oscilla M. A. M. Renner, Bryologist
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Cheilolejeunea
Cheilolejeunea oscilla

description: Cheilolejeunea oscilla M.A.M.Renner,
Bryologist 115 (4): 551, 2012 (see Renner 2012).
TYPE: “ AUSTRALIA, QUEENSLAND, North Kennedy, vicinity of Cardwell, Five Miles Creek Road, 18°18′S 146°01′E, 80m, M.A.M. Renner 1646 and E.A. Brown, 1 Jul. 2005 (holotype: NSW866201; isotypes: BRI, CANB)”.
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 64, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611