cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Creating big time crystals with ultracold atoms
Creators: name: Giergiel, Krzysztof
name: Tran, Tien
name: Zaheer, Ali
name: Singh, Arpana
name: Sidorov, Andrei
name: Sacha, Krzysztof
name: Hannaford, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the size of discrete time crystals s (ratio of response period to driving period) that can be created for a Bose-Einstein condensate (BEC) bouncing resonantly on an oscillating mirror. We find that time crystals can be created with sizes in the range s = 20 - 100 and that such big time crystals are easier to realize experimentally than a period-doubling (s = 2) time crystal because they require either a larger drop height or a smaller number of bounces on the mirror. We also investigate the effects of having a realistic soft Gaussian potential mirror for the bouncing BEC, such as that produced by a repulsive light-sheet, which is found to make the experiment easier to implement than a hard-wall potential mirror. Finally, we discuss the choice of atomic system for creating time crystals based on a bouncing BEC and present an experimental protocol for realizing big time crystals. Such big time crystals provide a flexible platform for investigating a broad range of non-trivial condensed matter phenomena in the time domain.
description: 19 pages, 8 figures, 2 tables
OPTIMAL CROP MIXFOR LAND TREATMENT OF MUNICIPAL WASTE WATER
Creators: name: Young, Edwin C.
name: Bradley, Edward B.
name: Epp, Donald J.
name: Young, Edwin C.
name: Bradley, Edward B.
name: Epp, Donald J.
Publisher: name: Unknown
Year: 1977
Subjects: Environmental Economics and Policy

description: In recent years, there has been increasing interest in controlling water pollution resulting from municipal wastewater discharges. Efforts to control water pollution have focused on the requirements and enforcement procedures of P.L. 92-500, the Water Pollution Control Act Amendments of 1972. Two features of this law which are relevant to this discussion are: (1) the explicit encouragement of wastewater treatment and reuse processes which recycle pollutants to other parts of the environment, particularly land application of municipal wastewater as a method of advanced wastewater treatment; and (2) the provision of federal grants to pay for up to 75% of the construction costs of municipal wastewater treatment works including the costs of land which is an integral part of the wastewater treatment process.
Towards Exact Results in Nodal Antiferromagnetic Planar Liquids
Creators: name: Alexandre, J.
name: Mavromatos, N. E.
name: Sarkar, Sarben
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been argued in previous works by the authors that nodal excitations in (2+1)-dimensional doped antiferromagnets might exhibit, in the spin-charge separation framework and at specific regions of the parameter space, a supersymmetry between spinons and holons. This supersymmetry has been elevated to a N=2 extended supersymmetry of composite operators of spinon and holons, corresponding to the effective "hadronic" degrees of freedom. In this work we elaborate further on this idea by describing in some detail the dynamics of a specific composite model corresponding to an Abelian Higgs model (SQED). The abelian nature of the gauge group seems to be necessitated both by the composite structure used, but also by electric charge considerations for the various composites. We demonstrate the passage from a pseudogap to an unconventional superconducting phase, which notably is an exact non-perturbative analytic result, due to the underlying N=2 supersymmetric Abelian gauge theory. We believe that these considerations may provide a first step towards a non-perturbative understanding of the phase diagrams of strongly-correlated electron systems.
THE POSSIBILITIES OF OBJECTIVE NORMATIVE AND PRESCRIPTIVE KNOWLEDGE
Creators: name: Johnson, Glenn L.
name: Johnson, Glenn L.
Publisher: name: Unknown
Year: 1978
Subjects: Public Economics

description: "Real world" development requires that numerous real world problems be defined and solved. Real world problems are defined on the basis of both normative and positive information. And, in turn, prescriptions to solve such problems are based on both positive and normative information. Therefore, the question of whether objective normative and prescriptive knowledge can be obtained through research is critical. If it cannot be obtained all problem definitions and solutions are arbitrary and emotional which in effect puts Hitler's and Stalin's decisions on a par with those of Lincoln and Gandhi.
Additional file 2 of A type II implementation-effectiveness hybrid quasi-experimental pilot study of a clinical intervention to re-engage people living with HIV into care, ‘Lost & Found’: an implementation science protocol
Creators: name: Cox, Joseph
name: Linthwaite, Blake
name: Engler, Kim
name: Lessard, David
name: Lebouché, Bertrand
name: Kronfli, Nadine
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Additional file 2. Implementation_CoxLinthwaite
NATURAL RESOURCE ECONOMICS: THE UPSETTING DISCIPLINE
Creators: name: Kelso, M.M.
name: Kelso, M.M.
Publisher: name: Unknown
Year: 1977
Subjects: Resource /Energy Economics and Policy

description: My discussion of the topic I have chosen will be more a personal testimony than an intellectual performance. I trust, of course, that my testimony will contain intellectual nourishment. It would be out of place before an august assembly of intellectuals like this if it didn't. But its intellectuality may be somewhat hidden because it will not be couched in intellectually brilliant analytics nor in soaring conceptual hyperbole. But I take comfort in Adam Smith's oft-quoted remark about the "invisible hand" and hope that the intellectuality in my personal testimony may lead you, as by an invisible hand, to new insights into your unconscious biases, hence recognition of what may be restraining unconscious assumptions in your conceptions of society and the world. I hope the result may be that you will then play leading roles in what I shall argue are imperative changes in our economic view. of man and his world if we are to help our society to avoid the apocalypse.
Siderophore containing extract from Serratia plymuthica AED38 as an efficient strategy against avocado root rot caused by Phytophthora cinnamomi
Creators: name: Restrepo, Sara Ramírez
name: Henao, Cristina Calle
name: Galvis, Lina María Arbeláez
name: Pérez, Juan Carlos Bedoya
name: Sánchez, Rodrigo Alberto Hoyos
name: Sinar David Granada García
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Phytophthora cinnamomi Rands. is a widely distributed pathogen in avocado crops. Root rot caused by Phytophthora cinnamomi decreases the yield and growers are to establish new productive areas in order to meet demand which in turn is causing the loss of native forests. Therefore, sustainable production of avocado is only possible by addressing yield issues and the efficient use of lands. In this work, the effectiveness of two promising antagonistic bacterial isolates associated to healthy avocado trees to protect avocado seedlings against P. cinnamomi was assessed. First, the virulence of five isolates of P. cinnamomi from different avocado growing regions in Colombia was evaluated. The most virulent isolate was used to infect five-month-old avocado seedlings. The native bacterial isolates, both identified as Serratia plymuthica, were used to produce extracts in solid medium and their inhibitory activity against P. cinnamomi was tested. One of the extracts was selected and submitted to a bioguided metabolite isolation. A siderophore molecule (serratiochelin C) was purified and fully characterised by Nuclear Magnetic Resonance. Finally, the protective capacity of one bacterial extract was assessed in vivo against the infection of Phytophthora cinnamomi on avocado along with a commercial product based on fosetyl-aluminum. The crude metabolic extract of S. plymuthica AED38 was found to be effective and nontoxic on seedlings at 60 µg.mL−1. The results were comparable with the effect of fosetyl-aluminum at 0.5 µg.mL−1. S. plymuthica extracts possess a promising potential as bioproduct for the control of P. cinnamomi.
Προσωπικά δεδομένα και ηλεκτρονικές επικοινωνίες
Creators: name: Πρωτόγερου, Αθανασία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2021
Subjects: Ηλεκτρονικές επικοινωνίες
Δικαιώματα του συνδρομητή-χρήστη
Μη αιτηθείσα επικοινωνία
Electronic communications
Legal protection of subscriber-user
Spamming

description: Τα τελευταία χρόνια η ανάπτυξη της Τεχνολογίας έχει αλλάξει άρδην τη ζωή μας. H πρόοδος που έχει σημειωθεί στον τομέα των επικοινωνιών έχει αλλάξει την καθημερινότητά μας επί τα βελτίω. Ωστόσο δεν θα πρέπει να παραγνωρίζονται και οι κίνδυνοι που οι αλλαγές αυτές δύνανται να σημάνουν στις ατομικές μας ελευθερίες. Στην παρούσα μελέτη, εξετάζεται το νομικό πλαίσιο της προστασίας των προσωπικών δεδομένων στον τομέα των ηλεκτρονικών επικοινωνιών. Συγκεκριμένα, γίνεται ανάλυση του ν. 3471/2006 ο οποίος θεσπίζει ένα προστατευτικό πλαίσιο για τον συνδρομητή-χρήστη, εξοπλίζοντάς τον με δικαιώματα και θωρακίζοντάς τον από τους κινδύνους από τη χρήση των ηλεκτρονικών υπηρεσιών που παρέχουν τα ηλεκτρονικά δίκτυα
description: In recent years, technology has changed our lives dramatically. Technological progress in telecomunications has changed our lives for better. Nevertheless, there is a great concern about our rights and our personal data. This progress poses a threat to our right of privacy This survey analyzes the hellenic law 3471/2006, which protects the personal data and the privacy of the subsriber or user of electonic services that are being provided in electronic nets
Symmetry of two terminal, non-linear electric conduction
Creators: name: Lofgren, A.
name: Marlow, C. A.
name: Shorubalko, I.
name: Taylor, R. P.
name: Omling, P.
name: Samuelson, L.
name: Linke, H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The well-established symmetry relations for linear transport phenomena can not, in general, be applied in the non-linear regime. Here we propose a set of symmetry relations with respect to bias voltage and magnetic field for the non-linear conductance of two-terminal electric conductors. We experimentally confirm these relations using phase-coherent, semiconductor quantum dots.
description: 4 pages, 4 figures
THE AVERAGE-MARGINAL CONFLICT IN MILK PRICING
Creators: name: Lasley, Floyd A.
name: Lasley, Floyd A.
Publisher: name: Unknown
Year: 1977
Subjects: Livestock Production/Industries

description: Pooling and pricing under Federal milk marketing orders have helped create a more stable marketing situation by translating marginal incentives and risks into averages. However, this paper considers how current instabilities in milk marketing stem from lack of satisfactory retranslation of average needs, costs, and incentives hack into marginal response.
title: Extraluminal abdominal gas: Finding the bubbles
Creators: name: Jelloul, Sarah
Publisher: name: European Congress of Radiology
Year: 2021
Subjects: subject: Ischaemia / Infarction
subject: Infection
subject: Acute
subject: Education
subject: Ultrasound
subject: CT
subject: Conventional radiography
subject: Gastrointestinal tract
subject: Emergency
subject: Abdomen

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: - Correctly identify abdominal extraluminal gas on plain radiography, ultrasound, and CT. - Determine the underlying cause and etiology of these findings. - Avoid pitfalls in diagnostic...
Folded Three-Spin String Solutions in AdS_5 x S^5
Creators: name: Ryang, Shijong
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a spinning closed string solution in AdS_5 x S^5 which is folded in the radial direction and has two equal spins in AdS_5 and a spin in S^5. The energy expression of the three-spin solution specified by the folding and winding numbers for the small S^5 spin shows a logarithmic behavior and a one-third power behavior of the large total AdS_5 spin, in the long string and in the short string located near the boundary of AdS_5 respectively. It exhibits the non-regular expansion in the 't Hooft coupling constant, while it takes the regular one when the S^5 spin becomes large.
description: 14 pages, LaTeX, no figures, a reference added
SOME EXAMPLES OF ETHICAL ISSUES FACED BY INDIVIDUAL AGRICULTURAL ECONOMISTS IN DEVELOPMENT WORK
Creators: name: Brown, Dave
name: Brown, Dave
Publisher: name: Unknown
Year: 1978
Subjects: Agricultural and Food Policy

description: Much writing on the ethics of development has dealt with issues at national and international policy levels. But most agricultural economists--junior professionals especially--are working at operational levels where we have to take such broad decisions as "givens." In our day-to-day roles we encounter many situations related to personal behavior as well as to program/project implementation which require ethical judgments. These "little" decisions add up to a lot and can have important bearing on aggregate effects of development efforts in human terms. Making these little decisions is in some ways tougher than when one is in high policymaking circles; one often has to choose whether to go along with the priorities and modes of behavior that have been established.
A Rapid Evidence Assessment on the Effectiveness of Intravenous Mega-Dose Multivitamins on Fibromyalgia, Chronic Fatigue, Cancer, and Asthma
Creators: name: Bilg, Ruby
Publisher: name: The University of British Columbia
Year: 2017

description: Purpose The focus of this Scholarly Practice Advancement Research project was to examine the evidence regarding the use of intravenous mega-dose vitamins for the specific conditions of interest for this project; fibromyalgia, chronic fatigue, cancer and asthma. These conditions were chosen because they are most frequently advertised by CAM providers as conditions wherein mega-doses of intravenous vitamins could be beneficial. Proponents have also made claims of research supporting intravenous mega-dose vitamin therapy, the Myers’ Cocktail and mega-doses of vitamin C and magnesium. Aims The aims of this project was to (a) conduct a Rapid Evidence Assessment (REA) to identify whether there is quality scientific evidence to support the use of intravenous mega dose m therapy as an effective therapeutic intervention for individuals with fibromyalgia, chronic fatigue, cancer, and asthma; (b) to evaluate the quality of published research available on the use of IVMM therapy for individuals with fibromyalgia, cancer, asthma and chronic fatigue. Methods A Rapid Evidence Assessment was utilized to explore the quality of scientific evidence available in supporting the use of intravenous mega-dose multivitamin therapy. The databases CINAHL, PubMed Central, Medline, Google Scholar and ClinicalTrials.gov were utilized in gathering studies for this project. Eleven articles were selected for this paper which identified the use of the Myers’ Cocktail, mega-doses of intravenous vitamin C, or mega-doses of magnesium. Results Adverse events were minimal within all studies evaluated, however no patient experienced an objective tumor response, no complete or lasting effect on pain or fatigue and for asthma, conventional therapy was required along with intravenous therapy. Some patient’s symptoms also worsened before they became better, and the effect of the interventions were strongest in subjects with lower baseline levels of the vitamins or in conjunction with conventional treatments. Conclusion Intravenous mega-doses of multivitamins, vitamin C and magnesium are well tolerated with minimal side effects, however available research fails to provide enough evidence to support the continued use of this complementary therapy. The use of intravenous therapy in conjunction with conventional therapies may have some benefit, however further clinical trials are required.
Mycoherbicide potential of Alternaria alternata (Fries.) Kiessler and its formulations on the host weed Xanthium strumarium L.
Creators: name: Nesma Abdessemed
name: Bahet, Youssef Anis
name: Zermane, Nadjia
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Plant Biology

description: This study evaluated the mycoherbicidal potential of Alternaria alternata (Fries.) Kiessler on cocklebur (Xanthium strumarium L.), a noxious weed in Algeria. Conidial suspension, a rapeseed-oil-based liquid formulation and a sodium-alginate-based solid formulation, all with 106 conidia/ml, as well as the herbicide (Mustang®) at a reduced dose (0.45 L/ha) were compared. Inoculum was applied on detached leaves of cocklebur under laboratory conditions and on 4–5 leaf stage cocklebur seedlings in pots in a greenhouse and in the field. Disease severity was highest following application of the liquid formulation in the detached leaf assay (95.5%) as well as in the pot (80%) and field (43%) experiments. Similarly, the oil-based liquid formulation reduced cocklebur height, root length and dry weight by up to 50%, 27% and 58%, respectively in pot trial and 40%, 51% and 45%, respectively in the field experiment. The conidial suspension ranked second in efficacy, followed by the solid formulation. Mustang® showed the highest herbicidal effect. None of the crops tested for host specificity including tomato, wheat, faba bean and zucchini was susceptible to the fungus. Our findings suggest that A. alternata has potential as biocontrol agent of cocklebur especially when applied in an oil-emulsion-based formulation.
title: Mechanical thrombectomy for treatment of cerebral venous sinus thrombosis.
Creators: name: Miranda Bautista, Juan
Publisher: name: European Congress of Radiology
Year: 2021
Subjects: subject: Obstruction / Occlusion
subject: Embolism / Thrombosis
subject: Recanalisation
subject: MR
subject: CT-Angiography
subject: Catheter arteriography
subject: Neuroradiology brain

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To show three cases of cerebral venous sinus thrombosis (CVST) treated with mechanical thrombectomy due to the patient's clinical state by using CT, angio-CT, cerebral angiography, and MR as the main radiological techniques. To review the algorithm...
IMPACT OF ALTERNATIVE CLASS 1 PRICING SYSTEMS ON THE LOCATION AND STRUCTURE OF THE U.S. DAIRY INDUSTRY
Creators: name: Fallert, Richard F.
name: Lough, Harold W.
name: Cummins, David E.
name: Fallert, Richard F.
name: Lough, Harold W.
name: Cummins, David E.
Publisher: name: Unknown
Year: 1977
Subjects: Livestock Production/Industries

description: The projected regional and aggregate impacts 0n the dairy industry of continued classified pricing under the Federal mi]k marketing order program and under elimination of Federal rni.lk orders are evaluated. The effects are measur0d on milk production, fluid consumption, and price, with special emphasis on industry location and structure.
title: Imaging in renal sarcoma and main differentials.
Creators: name: Miranda Bautista, Juan
Publisher: name: European Congress of Radiology
Year: 2021
Subjects: subject: Cancer
subject: Education
subject: CT
subject: Kidney
subject: Abdomen

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To describe and illustrate the main radiological manifestations of primary renal sarcomas, emphasizing some aspects of CT imaging that may be useful for their differential diagnosis with other solid retroperitoneal and renal masses. To show examples...
Mean-field analysis of the stability of a K-Rb Fermi-Bose mixture
Creators: name: Modugno, M.
name: Ferlaino, F.
name: Riboli, F.
name: Roati, G.
name: Modugno, G.
name: Inguscio, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We compare the experimental stability diagram of a Fermi-Bose mixture of K-40 and Rb-87 atoms with attractive interaction to the predictions of a mean-field theoretical model. We discuss how this comparison can be used to give a better estimate of the interspecies scattering length, which is currently known from collisional measurements with larger uncertainty.
description: 5 pages, 4 figures
Uncertainty propagation in phaseless electric properties tomography
Creators: name: Arduino, Alessandro
name: Bottauscio, Oriano
name: Chiampi, Mario
name: Zilberti, Luca
Publisher: name: arXiv
Year: 2019
Subjects: subject: Medical Physics (physics.med-ph)
subject: Signal Processing (eess.SP)
subject: Applied Physics (physics.app-ph)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Uncertainty propagation in a phaseless magnetic resonance-based electric properties tomography technique is investigated using the Monte Carlo method. The studied inverse method, which recovers the electric properties distribution at radiofrequency inside a scatterer irradiated by the coils of a magnetic resonance imaging scanner, is based on the contrast source inversion technique adapted to process phaseless input data.
description: 4 pages, 6 figures. 2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)
title: Multiparametric ultrasound imaging: attenuation imaging (ATI) and dispersion imaging role in quantitative evaluation of steatosis and viscosity in patients with chronic liver disease.
Creators: name: Radzina, Maija
Publisher: name: European Congress of Radiology
Year: 2021
Subjects: subject: Tissue characterisation
subject: Image registration
subject: Cirrhosis
subject: Equipment
subject: Diagnostic procedure
subject: Ultrasound
subject: Ultrasound physics
subject: Liver
subject: Abdomen

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: The prevalence of steatosis in patients with chronic liver disease is growing worldwide [2]. Hepatic fibrosis staging has been used as a prognostic factor by clinicians to measure clinical outcomes and as an index to establish therapeutic plans in...
Additional file 1 of A type II implementation-effectiveness hybrid quasi-experimental pilot study of a clinical intervention to re-engage people living with HIV into care, ‘Lost & Found’: an implementation science protocol
Creators: name: Cox, Joseph
name: Linthwaite, Blake
name: Engler, Kim
name: Lessard, David
name: Lebouché, Bertrand
name: Kronfli, Nadine
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Additional file 1. OOC-RPT_CoxLinthwaite
Transport theory in the normal state of high-$T_c$ superconductors
Creators: name: Arulsamy, Andrew Das
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Transport mechanism in the normal state of high-$T_c$ superconductors is described using the well known Fermi-Dirac statistics in which an additional restrictive constraint is introduced so as to capture the variation of resistivity with temperature and doping. The additional restrictive condition is the ionization energy that will eventually determine the properties of charge carriers' in the normal state of high-$T_c$ superconductors. The magnitude and the variation of charge carriers concentration and resistivities (polycrystalline, c-axis and $ab$-planes) with temperature and doping are very well described by the ionization energy based Fermi-Dirac statistics. However, these transport models are not appropriate for cuprates below the characteristics ($T^*$) and critical temperatures ($T_c$), metals with free electrons and strong electron-phonon scattering. Ionization energy is found to be an essential parameter to accurately predict variations of resistivity's magnitude with doping, charge carriers' concentrations, scattering rate constants as well as the effective mass. Apart from that, iFDS based resistivity models provide the comprehensive information on crossover-temperature (metallic $\to$ insulating transition temperature) in the normal state of high-$T_c$ superconductors.
description: Revised: to be published Superconductivity research at the leading edge(Nova Science Publishers, Inc., NY, 2003). 1 figure and 1 table are also included
An Origin of CMR: Competing Phases and Disorder-Induced Insulator-to-Metal Transition in Manganites
Creators: name: Motome, Yukitoshi
name: Furukawa, Nobuo
name: Nagaosa, Naoto
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically explore the mechanism of the colossal magnetoresistance in manganese oxides by explicitly taking into account the phase competition between the double-exchange ferromagnetism and the charge-ordered insulator. We find that quenched disorder causes a drastic change of the multicritical phase diagram by destroying the charge-ordered state selectively. As a result, there appears a nontrivial phenomenon of the disorder-induced insulator-to-metal transition in the multicritical regime. On the contrary, the disorder induces a highly-insulating state above the transition temperature where charge-ordering fluctuations are much enhanced. The contrasting effects provide an understanding of the mechanism of the colossal magnetoresistance. The obtained scenario is discussed in comparison with other theoretical proposals such as the polaron theory, the Anderson localization, the multicritical-fluctuation scenario, and the percolation scenario.
description: 16 pages, 7 figures, submitted to Wandlitz Days on Magnetism: Local-Moment Ferromagnets: Unique Properties for Modern Applications
Reaching large lengths and long times in polymer dynamics simulations
Creators: name: van Heukelum, Alexander
name: Barkema, G. T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A lattice model is presented for the simulation of dynamics in polymeric systems. Each polymer is represented as a chain of monomers, residing on a sequence of nearest-neighbor sites of a face-centered-cubic lattice. The polymers are self- and mutually avoiding walks: no lattice site is visited by more than one polymer, nor revisited by the same polymer after leaving it. The dynamics occurs through single-monomer displacements over one lattice spacing. To demonstrate the high computational efficiency of the model, we simulate a dense binary polymer mixture with repelling nearest-neighbor interactions between the two types of polymers, and observe the phase separation over a long period of time. The simulations consist of a total of 46,080 polymers, 100 monomers each, on a lattice with 13,824,000 sites, and an interaction strength of 0.1 kT. In the final two decades of time, the domain-growth is found to be d(t) ~ t^1/3, as expected for a so-called "Model B" system.
description: 6 pages, 4 eps figures
Mechanics of the Infinitesimal Gyroscopes on the Mylar Balloons and Their Action-Angle Analysis
Creators: name: Kovalchuk, Vasyl
name: Mladenov, Ivailo M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Here we apply the general scheme for description of the mechanics of infinitesimal bodies in the Riemannian spaces to the examples of geodetic and non-geodetic (for two different model potentials) motions of infinitesimal rotators on the Mylar balloons. The structure of partial degeneracy is investigated with the help of the corresponding Hamilton-Jacobi equation and action-angle analysis. In all situations it was found that for any of the six disjoint regions in the phase space among the three action variables only two of them are essential for the description of our models at the level of the old quantum theory (according to the Bohr-Sommerfeld postulates). Moreover, in both non-geodetic models the action variables were intertwined with the quantum number $N$ corresponding to the quantization of the radii $r$ of the inflated Mylar balloons.
description: 15 pages, 2 figures
Q-ball Metamorphosis
Creators: name: Kawasaki, Masahiro
name: Takahashi, Fuminobu
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Flat directions in the minimal supersymmetric standard model are known to deform into non-topological solitons, Q-balls, which generally possess both baryon and lepton asymmetries. We investigate how Q-balls evolve if some of the constituent fields of the flat direction decay into light species. It is found that the Q-balls takes a new configuration whose energy per charge slightly increases due to the decay. Specifically, we show that all the stable Q-balls eventually transform into pure B-balls via the decay into neutrinos.
description: 7 pages, 5 figures
Cloud Atlas: Weak color modulations due to rotation in the planetary-mass companion GU Psc b and 11 other brown dwarfs
Creators: name: Lew, Ben W. P.
name: Apai, Dániel
name: Zhou, Yifan
name: Radigan, Jacqueline
name: Marley, Mark
name: Schneider, Glenn
name: Cowan, Nicolas B.
name: Miles-Páez, Paulo A.
name: Manjavacas, Elena
name: Karalidi, Theodora
name: Bedin, L. R.
name: Lowrance, Patrick J.
name: Burgasser, Adam J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Among the greatest challenges in understanding ultra-cool brown dwarf and exoplanet atmospheres is the evolution of cloud structure as a function of temperature and gravity. In this study, we present the rotational modulations of GU Psc b -- a rare mid-T spectral type planetary-mass companion at the end of the L/T spectral type transition. Based on the HST/WFC3 1.1-1.67$\rm\, μm$ time-series spectra, we observe a quasi-sinusoidal light curve with a peak-to-trough flux variation of 2.7 % and a minimum period of eight hours. The rotation-modulated spectral variations are weakly wavelength-dependent, or largely gray between 1.1-1.67$\rm\,μ$m. The gray modulations indicate that heterogeneous clouds are present in the photosphere of this low-gravity mid-T dwarf. We place the color and brightness variations of GU Psc b in the context of rotational modulations reported for mid-L to late-T dwarfs. Based on these observations, we report a tentative trend: mid-to-late T dwarfs become slightly redder in $J-H$ color with increasing $J$-band brightness, while L dwarfs become slightly bluer with increasing brightness. If this trend is verified with more T-dwarf samples, it suggests that in addition to the mostly gray modulations, there is a second-order spectral-type dependence on the nature of rotational modulations.
description: 15 pages, 7 figures, accepted for publication in AJ
Cosmological gravity on all scales: simple equations, required conditions, and a framework for modified gravity
Creators: name: Thomas, Daniel B
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The cosmological phenomenology of gravity is typically studied in two limits: relativistic perturbation theory (on large scales) and Newtonian gravity (required for smaller, non-linear, scales). Traditional approaches to model-independent modified gravity are based on perturbation theory, so do not apply on non-linear scales. Future surveys such as Euclid will produce significant data on both linear and non-linear scales, so a new approach is required to constrain model-independent modified gravity by simultaneously using all of the data from these surveys. We use the higher order equations from the post-Friedmann approach to derive a single set of "simple 1PF" (first post-Friedmann) equations that apply in both the small scale and large scale limits, and we examine the required conditions for there to be no intermediate regime, meaning that these simple equations are valid on all scales. We demonstrate how the simple 1PF equations derived here can be used as a model-independent framework for modified gravity that applies on all cosmological scales, and we present an algorithm for determining which modified gravity theories are subsumed under this approach. This modified gravity framework provides a rigorous approach to phenomenological N-body simulations, and paves the way to consistently using all of the data from upcoming surveys to constrain modified gravity in a model-independent fashion.
description: Minor updates to match version published in PRD, primarily the addition of section V.C.6. Chosen as editor's suggestion
A search for radioactive 26Al in the nova-like variable V4332 Sagittarii
Creators: name: Banerjee, D. P. K.
name: Ashok, N. M.
name: Launila, O.
name: Davis, C. J.
name: Varricatt, W. P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have searched for the important radioactive isotope 26Al in the nova-like source V4332 Sgr. Recent results from gamma ray astronomy show that there is pervasive emission of the 1.809 MeV gamma ray photon, arising from the decay of 26Al to 26Mg, from all over the galactic plane. Though the sites from where this emission originates are not clearly established, novae are believed to be an important contributing source. In this context, V4332 Sgr presented a rare opportunity to observationally investigate whether novae or novae-like sources synthesize 26Al and to what extent. Strong AlO bands in the near-IR have been reported in this object recently. As molecular bands of different isotopic compositions are readily resolved spectroscopically (e.g. 12CO and 13CO), it was thought that the components of AlO associated with 26Al and stable 27Al could be detected as separate bands. Our spectra indicate that there is no strong presence of 26Al in V4332 Sgr. A reliable upper limit of 0.10 for the 26Al/27Al ratio is determined which constitutes the first observational constraint for this ratio in a potential 26Al producing source. While V4332 Sgr is not a typical nova, its outburst amplitude and light-curve behaviour bear close similarity to that of novae. Hence, although the results from V4332 Sgr cannot be directly extended to novae in general, the limit on the observed 26Al/27Al ratio could be a useful input in constraining rather uncertain nucleosynthesis models for the production of 26Al in novae/novae-like sources. By comparing the observed 26Al/27Al ratio in V4332 Sgr with that expected in classical novae it appears unlikely that the progenitor of V4332 Sgr is an Oxygen-Neon-Magnesium white dwarf.
description: 9 pages, 2 figures, to appear in Ap.J(L) July 2004
title: Covid-19 Myopericarditis Outbreak! Rising Knowledge of 3 Tesla Cardiac Magnetic Resonance (3T CMR)
Creators: name: SANTOS, ARTUR
Publisher: name: European Congress of Radiology
Year: 2021
Subjects: subject: Ischaemia / Infarction
subject: Inflammation
subject: Infection
subject: Perception image
subject: Outcomes analysis
subject: Diagnostic procedure
subject: MR
subject: Cardiovascular system
subject: Cardiac

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To discuss clinical manifestations, proposed pathophysiological mechanisms and resonance imaging findings of this emerging condition that is COVID-19-induced acute myopericarditis. To evaluate the proposed pathophysiological mechanisms in a single...
Estimation of Spatial Deformation for Nonstationary Processes via Variogram Alignment
Creators: name: Qadir, Ghulam A.
name: Sun, Ying
name: Kurtek, Sebastian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: 62H11, 62M30

description: In modeling spatial processes, a second-order stationarity assumption is often made. However, for spatial data observed on a vast domain, the covariance function often varies over space, leading to a heterogeneous spatial dependence structure, therefore requiring nonstationary modeling. Spatial deformation is one of the main methods for modeling nonstationary processes, assuming the nonstationary process has a stationary counterpart in the deformed space. The estimation of the deformation function poses severe challenges. Here, we introduce a novel approach for nonstationary geostatistical modeling, using space deformation, when a single realization of the spatial process is observed. Our method is based, at a fundamental level, on aligning regional variograms, where warping variability of the distance from each subregion explains the spatial nonstationarity. We propose to use multi-dimensional scaling to map the warped distances to spatial locations. We asses the performance of our new method using multiple simulation studies. Additionally, we illustrate our methodology on precipitation data to estimate the heterogeneous spatial dependence and to perform spatial predictions.
Magnons in the half-doped manganites
Creators: name: Ventura, C. I.
name: Alascio, B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently, based on the refined crystal structure of Pr0.6Ca0.4MnO3 from neutron diffraction, Daoud-Aladine et al.[PRL89,97205(2002)] have proposed a new ground state structure for the half-doped manganites R0.5Ca0.5MnO3, where R is a trivalent ion like Bi,La,Pr,Sm or Y. Their proposal describes the CE magnetic structure attributed to these materials as an arrangement of dimers along the ferromagnetic Mn zig-zag chains that form it. However, the dimers' proposal is in conflict with the Goodenough-Kanamori-Anderson rules, which give a coherent description of many transition metal insulating compounds and predict the coexistence of Mn3+ and Mn4+ ions in equal parts in the half-doped manganites. On the other hand, Rivadulla et al.[PRB 66, 174432 (2002)] have studied several single crystal samples of half-doped manganites and propose a phase diagram in terms of the tolerance factor which contains both types of structures. In the present work we have calculated the magnon dispersion relations for the CE magnetic structure, arising for each type of proposal: the charge ordered and the dimer phases, respectively. We consider a three-dimensional unit cell containing 16 spins, and compare the magnetic excitations along different paths in the first Brillouin zone. We conclude that measurement of the magnon dispersion relations should allow a clear distinction between the two proposals, predicting qualitative differences arising along specific directions of propagation in the first Brillouin zone.
description: 5 pages, 6 figures
SOCIO-PSYCHOLOGICAL MEASURES OF RURAL QUALITY OF LIFE: A PROXY FOR MEASURING THE MARGINAL UTILITY OF INCOME
Creators: name: Harper, Wilmer M.
name: Tweeten, Luther
name: Harper, Wilmer M.
name: Tweeten, Luther
Publisher: name: Unknown
Year: 1977
Subjects: Public Economics

description: Economics has been defined as the science of allocating scarce means among competing ends. Ultimate ends to be achieved in so far as possible may be defined as well-being, satisfaction, utility, or quality of life. It has become fashionable to divaricate economics into dimensions of efficiency and equity. Defined as increasing the size of the "pie" of goods and services, efficiency has received the lion's share of attention by economists --its study has been viewed as objective, precise and respectable.
Αντιλήψεις και συναισθήματα εκπαιδευτικών νοσοκομειακών σχολείων για το έργο τους: Η περίπτωση του Ιπποκράτειου νοσοκομείου Θεσσαλονίκης
Creators: name: Μπαβέλη Ελευθερία-Ειρήνη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2021
Subjects: εκπαιδευτικός
αντιλήψεις
συναισθήματα
σχολείο στο νοσοκομείο
teachers
perspectives
emotions
hospital schools

description: Στόχος αυτής της μελέτης ήταν να διερευνήσει τις αντιλήψεις και τα συναισθήματα των εκπαιδευτικών που εργάζονται στο νοσοκομειακό σχολείο του Ιπποκράτειου Νοσοκομείου Θεσσαλονίκης σχετικά με το έργο τους. Οι συμμετέχοντες ήταν εκπαιδευτικοί που εργάζονταν εκεί κατά την περίοδο που πραγματοποιήθηκε η έρευνα ή εργάζονταν παλιότερα και κλήθηκαν να απαντήσουν στις ερωτήσεις του οδηγού συνέντευξης. Τα δεδομένα συλλέχθηκαν από πρόσωπο με πρόσωπο συνεντεύξεις κατά τον Φεβρουάριο του 2020. Σύμφωνα με τη θεματική ανάλυση των απαντήσεων που προέκυψαν από τις συνεντεύξεις, οι εκπαιδευτικοί που εργάζονται στο νοσοκομειακό σχολείο του Ιπποκράτειου, περιγράφουν ως κύριες προκλήσεις στην εργασία τους την έλλειψη σταθερών συνθηκών και την ατομική μάθηση. Οι εκπαιδευτικοί εξέφρασαν θετικά κυρίως συναισθήματα για το έργο που επιτελούν και δήλωσαν ότι χρησιμοποιούν αποτελεσματικές στρατηγικές για την αντιμετώπιση των προβλημάτων που ανακύπτουν. Στην εργασία εξετάζονται οι εκπαιδευτικές συνέπειες των αντιλήψεων και των συναισθημάτων των εκπαιδευτικών, όπως διατυπώνονται από τους ίδιους στις αυτοαναφορές τους και γίνονται προτάσεις για περαιτέρω έρευνα
description: The aim of this study was to investigate the perspectives and emotions towards job of the teachers who work in the hospital school of Ippokrateio Hospital, Thessaloniki. Participants were teachers who work currently or used to work in this hospital school, who were asked to answer on interviews. Data was collected from face-to-face interviews during February of 2020. According to thematic analysis of the answers on interviews, teachers who work in the hospital school of Ippokrateio hospital, describe lack of consistency and individual learning as the main challenges at work, they use effective strategies to deal with the problems at work, and express mainly positive emotions towards their work. The educational implications of the above results, as well as suggestions for further research, are discussed
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
title: Magnetic Resonance Imaging findings in non-alcoholic acute Wernicke's encephalopathy
Creators: name: Noureddine, Leila
Publisher: name: European Congress of Radiology
Year: 2021
Subjects: subject: Metabolic disorders
subject: Observer performance
subject: Localisation
subject: Education
subject: MR-Spectroscopy
subject: MR-Diffusion/Perfusion
subject: MR
subject: Head and neck
subject: CNS

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Wernicke's encephalopathy is a severe neurological disorder caused by thiamine (vitamin B1) deficiency. In our context, it is much more largely caused by hyperemesis gravidarum or other conditions causing malabsorption. Its clinical and radiological...
Array of Bose-Einstein condensates under time-periodic Feshbach-resonance management
Creators: name: Abdullaev, F. Kh.
name: Tsoy, E. N.
name: Malomed, B. A.
name: Kraenkel, R. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The dynamics of a discrete soliton in an array of Bose-Einstein condensates under the action of a periodically time-modulated atomic scattering length (``Feshbach-resonance management, FRM'') is investigated. The cases of both slow and rapid modulation, in comparison with the tunneling frequency, are considered. We employ a discrete variational approach for the analysis of the system. The existence of nonlinear resonances and chaos is predicted at special values of the driving frequency. Soliton splitting is observed in numerical simulations. In the case of the rapid modulation, we derive an averaged equation, which is a generalized discrete nonlinear Schroedinger equation, including higher-order effective nonlinearities and intersite nonlinear interactions. Thus the predicted discrete FRM solitons are a direct matter-wave analog of recently investigated discrete diffraction-managed optical solitons.
description: Submitted to Phys. Rev. A