cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum phase transition in capacitively coupled double quantum dots
Creators: name: Galpin, Martin R.
name: Logan, David E.
name: Krishnamurthy, H. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate two equivalent, capacitively coupled semiconducting quantum dots, each coupled to its own lead, in a regime where there are two electrons on the double dot. With increasing interdot coupling a rich range of behavior is uncovered: first a crossover from spin- to charge-Kondo physics, via an intermediate SU(4) state with entangled spin and charge degrees of freedom; followed by a quantum phase transition of Kosterlitz-Thouless type to a non-Fermi liquid `charge-ordered' phase with finite residual entropy and anomalous transport properties. Physical arguments and numerical renormalization group methods are employed to obtain a detailed understanding of the problem.
description: 4 pages, 3 figures
Unveiling Phase Space Modifications: A Clash of Modified Gravity and the Generalized Uncertainty Principle
Creators: name: Wojnar, Aneta
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This study explores the link between Modified Gravity and modifications of phase space volume. Analyzing Fermi gas modifications {in the non-relativistic limit of the} Ricci-based gravities, we derive a generalized partition function in the grand-canonical ensemble, connecting Modified Gravity models with the Generalized Uncertainty Principle. Using this correspondence, we also establish bounds on the linear Generalized Uncertainty Principle: $-6\times10^{22}\lesssimσ\lesssim 3\times 10^{22}{\text{ s}}/{\text{kg m}}$, as well as lower bounds for Palatini $f(R)$ gravity $β> -7.51587\times 10^7 \text{ m}^2$ and Eddington-inspired Born-Infeld gravity $ε> -1.88\times 10^7 \text{ m}^2$, ensuring microscopic stability. This connection also facilitates testing gravity proposals through tabletop experiments.
description: 6 pages, minor changes to text to match version accepted for publication in Phys.Rev.D
Revision of the genus Opisthozemius Kolbe, 1916, with description of a new species and designation of a new genus (Coleoptera: Brentidae, Cyphagoginae)
Creators: name: Orbach, Eylon
name: Bartolozzi, Luca
Publisher: name: Fragmenta Entomologica
Year: 2019

description: The Afrotropical genus Opisthozemius Kolbe, 1916 is revised. The genus now includes four species, one of which is described as new: Opisthozemius naamae sp. nov., from Tanzania and Zambia. Opisthozemius sulcithorax Damoiseau, 1967, from Java, is removed from the genus Opisthozemius and included in Euparagogus gen. nov. Opisthozemius honestus is placed in synonymy with Opisthozemius vittatus (new synonymy). A key for the identification of the species of Opisthozemius and some distributional data are also given. O. appendiculatus is quoted for the first time from Ghana; O. vittatus for the first time from Central African Republic, Ghana and Uganda.
description: Fragmenta Entomologica, Vol. 51 No. 1 (2019)
Can correlations drive a band insulator metallic?
Creators: name: Garg, Arti
name: Krishnamurthy, H. R.
name: Randeria, Mohit
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze the effects of the on-site Coulomb repulsion U on a band insulator using dynamical mean field theory (DMFT). We find the surprising result that the gap is suppressed to zero at a critical Uc1 and remains zero within a metallic phase. At a larger Uc2 there is a second transition from the metal to a Mott insulator, in which the gap increases with increasing U. These results are qualitatively different from Hartree-Fock theory which gives a monotonically decreasing but non-zero insulating gap for all finite U.
description: 4 pages, 5 figures
Age-Net: An MRI-Based Iterative Framework for Brain Biological Age Estimation
Creators: name: Armanious, Karim
name: Abdulatif, Sherif
name: Shi, Wenbin
name: Salian, Shashank
name: Küstner, Thomas
name: Weiskopf, Daniel
name: Hepp, Tobias
name: Gatidis, Sergios
name: Yang, Bin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The concept of biological age (BA), although important in clinical practice, is hard to grasp mainly due to the lack of a clearly defined reference standard. For specific applications, especially in pediatrics, medical image data are used for BA estimation in a routine clinical context. Beyond this young age group, BA estimation is mostly restricted to whole-body assessment using non-imaging indicators such as blood biomarkers, genetic and cellular data. However, various organ systems may exhibit different aging characteristics due to lifestyle and genetic factors. Thus, a whole-body assessment of the BA does not reflect the deviations of aging behavior between organs. To this end, we propose a new imaging-based framework for organ-specific BA estimation. In this initial study, we focus mainly on brain MRI. As a first step, we introduce a chronological age (CA) estimation framework using deep convolutional neural networks (Age-Net). We quantitatively assess the performance of this framework in comparison to existing state-of-the-art CA estimation approaches. Furthermore, we expand upon Age-Net with a novel iterative data-cleaning algorithm to segregate atypical-aging patients (BA $\not \approx$ CA) from the given population. We hypothesize that the remaining population should approximate the true BA behavior. We apply the proposed methodology on a brain magnetic resonance image (MRI) dataset containing healthy individuals as well as Alzheimer's patients with different dementia ratings. We demonstrate the correlation between the predicted BAs and the expected cognitive deterioration in Alzheimer's patients. A statistical and visualization-based analysis has provided evidence regarding the potential and current challenges of the proposed methodology.
description: Accepted to IEEE Transcations on Medical Imaging 2021. 13 pages, 14 figures, 4 tables
The antlions of Cyprus: review and new reports (Neuroptera: Myrmeleontidae)
Creators: name: Badano, Davide
name: Makris, Christodoulos
name: John, Eddie
name: Hadjiconstantis, Michael
name: Sparrow, David
name: Sparrow, Rosalyn
name: Thomas, Bethan
name: Devetak, Dušan
Publisher: name: Fragmenta Entomologica
Year: 2019

description: The antlions (Myrmeleontidae) of Cyprus have been poorly studied and only 13 species were known from this biogeographically interesting island. In light of new field research, we provide an updated checklist to the Cypriot antlions, including seven species reported for the first time from the island. Of these, the findings of the Middle Eastern species Distoleon laticollis and Cueta kasyi are particularly noteworthy. The Cypriot antlion fauna appears dominated by widespread Mediterranean elements, with relatively few Middle Eastern and endemic species.
description: Fragmenta Entomologica, Vol. 50 No. 2 (2018)
Normal Forms for Symplectic Maps with Twist Singularities
Creators: name: Dullin, H. R.
name: Ivanov, A. V.
name: Meiss, J. D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We derive a normal form for a near-integrable, four-dimensional symplectic map with a fold or cusp singularity in its frequency mapping. The normal form is obtained for when the frequency is near a resonance and the mapping is approximately given by the time-$T$ mapping of a two-degree-of freedom Hamiltonian flow. Consequently there is an energy-like invariant. The fold Hamiltonian is similar to the well-studied, one-degree-of freedom case but is essentially nonintegrable when the direction of the singular curve in action does not coincide with curves of the resonance module. We show that many familiar features, such as multiple island chains and reconnecting invariant manifolds, are retained even in this case. The cusp Hamiltonian has an essential coupling between its two degrees of freedom even when the singular set is aligned with the resonance module. Using averaging, we approximately reduced this case to one degree of freedom as well. The resulting Hamiltonian and its perturbation with small cusp-angle is analyzed in detail.
description: LaTex, 27 pages, 21 figures
New data on the Australasian Xantholinini. 12. New species from New Caledonia (Coleoptera: Staphylinidae)
Creators: name: Bordoni, Arnaldo
Publisher: name: Fragmenta Entomologica
Year: 2018

description: In this short contribution some specimens from New Caledonia, colletcted by Dr. Geoff Monteith of the Queensland Museum of Brisbane, are studied and four new species are described and illustrated (Pachycorynus monteithi sp. n., P. flavus sp. n., P. insularis sp. n., and Zeteotomus insularis sp. n.). The known New Caledonian Xantholinini are now represented by 17 species.
description: Fragmenta Entomologica, Vol. 50 No. 2 (2018)
On the Power of Deep but Naive Partial Label Learning
Creators: name: Seo, Junghoon
name: Huh, Joon Suk
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Partial label learning (PLL) is a class of weakly supervised learning where each training instance consists of a data and a set of candidate labels containing a unique ground truth label. To tackle this problem, a majority of current state-of-the-art methods employs either label disambiguation or averaging strategies. So far, PLL methods without such techniques have been considered impractical. In this paper, we challenge this view by revealing the hidden power of the oldest and naivest PLL method when it is instantiated with deep neural networks. Specifically, we show that, with deep neural networks, the naive model can achieve competitive performances against the other state-of-the-art methods, suggesting it as a strong baseline for PLL. We also address the question of how and why such a naive model works well with deep neural networks. Our empirical results indicate that deep neural networks trained on partially labeled examples generalize very well even in the over-parametrized regime and without label disambiguations or regularizations. We point out that existing learning theories on PLL are vacuous in the over-parametrized regime. Hence they cannot explain why the deep naive method works. We propose an alternative theory on how deep learning generalize in PLL problems.
Time variability of X-ray sources in the M 31 centre field
Creators: name: Stiele, H.
name: Pietsch, W.
name: Haberl, F.
name: Freyberg, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an extension to our XMM-Newton X-ray source catalogue of M 31, containing 39 newly found sources. In order to classify and identify more of the sources we search for X-ray time variability in XMM-Newton archival data of the M 31 centre field. As a source list we used our extended catalogue based on observations covering the time span from June 2000 to July 2004. We then determined the flux or at least an upper limit at the source positions for each observation. Deriving the flux ratios for the different observations and searching for the maximum flux difference we determined variability factors. We also calculated the significance of the flux ratios. Using hardness ratios, X-ray variability and cross correlations with catalogues in the X-ray, optical, infrared and radio regimes, we detected three super soft source candidates, one supernova remnant and six supernova remnant candidates, one globular cluster candidate, three X-ray binaries and four X-ray binary candidates. Additionally we identified one foreground star candidate and classified fifteen sources with hard spectra, which may either be X-ray binaries or Crab-like supernova remnants in M 31 or background active galactic nuclei. The remaining five sources stay unidentified or without classification. Based on the time variability results we suggest six sources, which were formerly classified as "hard", to be X-ray binary candidates. The classification of one other source (XMMM31 J004236.7+411349) as a supernova remnant, has to be rejected due to the distinct time variability we found. We now classify this source as a foreground star.
description: 13 pages, 6 figures, accepted for publication in A&A
A Survey on Vulnerability of Federated Learning: A Learning Algorithm Perspective
Creators: name: Xie, Xianghua
name: Hu, Chen
name: Ren, Hanchi
name: Deng, Jingjing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This review paper takes a comprehensive look at malicious attacks against FL, categorizing them from new perspectives on attack origins and targets, and providing insights into their methodology and impact. In this survey, we focus on threat models targeting the learning process of FL systems. Based on the source and target of the attack, we categorize existing threat models into four types, Data to Model (D2M), Model to Data (M2D), Model to Model (M2M) and composite attacks. For each attack type, we discuss the defense strategies proposed, highlighting their effectiveness, assumptions and potential areas for improvement. Defense strategies have evolved from using a singular metric to excluding malicious clients, to employing a multifaceted approach examining client models at various phases. In this survey paper, our research indicates that the to-learn data, the learning gradients, and the learned model at different stages all can be manipulated to initiate malicious attacks that range from undermining model performance, reconstructing private local data, and to inserting backdoors. We have also seen these threat are becoming more insidious. While earlier studies typically amplified malicious gradients, recent endeavors subtly alter the least significant weights in local models to bypass defense measures. This literature review provides a holistic understanding of the current FL threat landscape and highlights the importance of developing robust, efficient, and privacy-preserving defenses to ensure the safe and trusted adoption of FL in real-world applications.
description: https://github.com/Rand2AI/Awesome-Vulnerability-of-Federated-Learning
A QED Model for Non-thermal Emission from SGRs and AXPs
Creators: name: Heyl, Jeremy S.
name: Hernquist, Lars
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Previously, we showed that, owing to effects arising from quantum electrodynamics (QED), magnetohydrodynamic fast modes of sufficient strength will break down to form electron-positron pairs while traversing the magnetospheres of strongly magnetised neutron stars. The bulk of the energy of the fast mode fuels the development of an electron-positron fireball. However, a small, but potentially observable, fraction of the energy ($\sim 10^{33}$ ergs) can generate a non-thermal distribution of electrons and positrons far from the star. In this paper, we examine the cooling and radiative output of these particles. We also investigate the properties of non-thermal emission in the absence of a fireball to understand the breakdown of fast modes that do not yield an optically thick pair plasma. This quiescent, non-thermal radiation associated with fast mode breakdown may account for the recently observed non-thermal emission from several anomalous X-ray pulsars and soft-gamma repeaters.
description: 14 pages, 2 figures, submitted to MNRAS
Innovation, specialization and growth in a model of structural change
Creators: name: Andergassen, Rainer
name: Nardini, Franco
name: Ricottilli, Massimo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: SECS-P/01 Economia politica

description: The aim of this paper is to investigate the nexus between demand patterns and innovation as it stems from research efforts and the extent of specialization. In the proposed model an innovation race conducted by entrants investing in research and development against established incumbents raises productivity at the industry level and leads to a shift in the aggregate demand pattern and consequently to a redistribution of the profit fund among industries and a restructuring of the production process in each industry. The paper argues that the degree of development as reflected in a demand share distribution is characterized by a corresponding distribution of specialized sectors that becomes more even across industries as the development process proceeds and investigates the consequences in terms of economic growth.
Fine Structure Constant in the Spacetime of a Cosmic String
Creators: name: Nasseri, Forough
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the fine structure constant in the spacetime of a cosmic string. In the presence of a cosmic string the value of the fine structure constant reduces. We also discuss on numerical results.
description: 5 pages, Published in Phys. Lett. B
THE SEASONALITY OF PRICES RECEIVED AND PRICES PAID BY THE UNITED STATES FARMERS
Creators: name: Olayemi, Joseph
name: Olayemi, Joseph
Publisher: name: Unknown
Year: 1966
Subjects: Demand and Price Analysis

description: Seasonal indices represent the percentages that the prices for a particular month are of the yearly average price when the effects of major changes in demand, and year-to-year changes in supply are eliminated. The indices represent general tendencies in prices; they do not indicate what actual prices will be in certain periods. This paper is concerned with the analysis of the seasonality of prices received and paid by farmers between 1945 and 1965.
Quality, Distance and Trade: a Strategic Approach
Creators: name: Bacchiega, Emanuele
name: Minniti, Antonio
name: Palestini, Arsen
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: SECS-P/01 Economia politica

description: This paper contributes to the literature on distance and quality by identifying a firm-based force contributing to explain the observed increase of the quality of shipped goods with the distance of their destination market. This force originates from the influence of distance on firms' strategic behavior when the quality level of goods is a choice variable for them, and complements the ones already proposed in the literature. Our approach differs from the extant literature because it does not rely on technology or preference/income differentials to identify the determinants and drivers of trade flows. Moreover, it allows to clearly disentangle between the price setting and quality choice of firms. We find that distance has an unambiguously positive effect on the average quality of traded goods. Our results suit the empirical evidence on distance and quality and contribute to the analysis of the determinants of firms' trade performance.
A new species of Teratolytta from Iran, with an updated identification key to the males of this genus (Coleoptera: Meloidae)
Creators: name: Serri, Sayeh
name: Bologna, Marco A.
Publisher: name: Fragmenta Entomologica
Year: 2018

description: Teratolytta capillata sp. n., the southernmost representative of the section I of this genus, is described, figured and the diagnostic characters within T. carlae group are listed. An updated identification key to the males of Teratolytta species is also provided.
description: Fragmenta Entomologica, Vol. 50 No. 2 (2018)
Path integral Monte Carlo calculations of helium and hydrogen-helium plasma thermodynamics and of the deuterium shock Hugoniot
Creators: name: Levashov, P. R.
name: Filinov, V. S.
name: Bonitz, M.
name: Fortov, V. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this work we calculate the thermodynamic properties of hydrogen-helium plasmas with different mass fractions of helium by the direct path integral Monte Carlo method. To avoid unphysical approximations we use the path integral representation of the density matrix. We pay special attention to the region of weak coupling and degeneracy and compare the results of simulation with a model based on the chemical picture. Further with the help of calculated deuterium isochors we compute the shock Hugoniot of deuterium. We analyze our results in comparison with recent experimental and calculated data on the deuterium Hugoniot.
description: 7 pages, 5 Postscript figures, accepted for publication in J. Phys. A: Math. Gen
Stappert, Bernd: Weltlich von Gott handeln
Creators: name: Pfisterer, K. Dieterich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 28 Nr. 1 (1979): Ökumenische Rundschau, Band 28, Heft 1
Agricoltura e sviluppo economico: il caso italiano (secoli XVIII-XX)
Creators: name: Farolfi, Bernardino
name: Fornasari, Massimo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: SECS-P/12 Storia economica

description: Modelli dell'agricoltura italiana dal settecento al secondo dopoguerra.
Phonons and thermal transport in Si/SiO$_2$ multishell nanotubes: Atomistic study
Creators: name: Isacova, C.
name: Cocemasov, A.
name: Nika, D. L.
name: Fomin, V. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermal transport in the Si/SiO$_2$ multishell nanotubes is investigated theoretically. The phonon energy spectra are obtained using the atomistic Lattice Dynamics approach. Thermal conductivity is calculated using the Boltzmann transport equation within the relaxation time approximation. Redistribution of the vibrational spectra in multishell nanotubes leads to a decrease of the phonon group velocity and the thermal conductivity as compared to homogeneous Si nanowires. Phonon scattering on the Si/SiO$_2$ interfaces is another key factor of strong reduction of the thermal conductivity in these structures (down to 0.2 W/mK at room temperature). We demonstrate that phonon thermal transport in Si/SiO$_2$ nanotubes can be efficiently suppressed by a proper choice of nanotube's geometrical parameters: lateral cross-section, thickness and number of shells.
description: 14 pages, 4 figures
NATIONAL INCOME AND EMPLOYMENT IMPACTS OF RAILROAD BRANCH LINE ABANDONMENT: CONCEPTUALIZATION AND MEASUREMENT
Creators: name: Fishbein, Robert Eric
name: Fishbein, Robert Eric
Publisher: name: Unknown
Year: 1977
Subjects: Land Economics/Use

description: This study seeks to contribute to the development of procedures which provide useful information to decision-makers and affected people regarding the national income and employment impacts of railroad branch line abandonment. There are three major parts to this paper. The first part probes the underlying assumptions of public investment analysis. It is noted that non-Pareto optimal welfare changes occur whether or not abandonment takes place. The decision of whether or not to subsidize branch lines is based on the decision-makers' evaluation of certain important consequences, expressed in terms of criterion variables. It is argued that analyses should provide information regarding criterion variables to which decision-makers can assign values in the ultimate abandonment decision. The second part presents a conceptual approach within which two criterion variables -national income and employment impacts-can be isolated. National income impacts are composed of changes in the amount of resources devoted to transport cost and changes in output. Employment impacts are examined in the dimensions of occupational groups and geographical areas. The last part applies the conceptual approach by estimating and displaying national income and employment impacts for four connecting branch lines in Michigan. Finally, data limitations and problems in empirical estimations are brought to light in the summary and conclusions.
Is conformism desirable? Network e¤ects, location choice,
and social welfare in a duopoly
Creators: name: Savorelli, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: SECS-P/01 Economia politica

description: In this paper we study a duopoly where the network e¤ect is nonmonotone and the network can be overloaded. The firms choose prices and locations endogenously, and the agent's utility is influenced by the number of people patronizing the same firm she does. We determine the market equilibrium, and we study how the network effect influences social welfare. We compare this setting with the standard horizontal differentiation model with no network effects to understand whether and how conformism is
socially desirable. The results show that whether network effects are desirable depends on how people are conformist, and whether overloading is feasible. If overloading is not possible (in either of the firm's network), and the total consumers' mass is sufficiently high, a network effect which is slightly concave increases social welfare. By
contrast, if overloading is feasible, and the total consumers' mass is sufficiently small, social welfare is increased if the network effect is more concave than in the previous case.
Phylogenetically problematic Aater cangshanensis gen. et sp. nov. from Southwest China suggests multiple origins of prosternal canal in Molytinae weevils (Coleoptera: Curculionidae)
Creators: name: Grebennikov, Vasily V.
Publisher: name: Fragmenta Entomologica
Year: 2018

description: A new weevil taxon, Aater cangshanensis gen. et sp. nov. is established for a single female specimen sifted from the forest litter on the Cang Shan Mountain Range in Yunnan, China. This small flightless beetle (the combined length of pronotum and elytra is 3.4 mm) has relatively long and straight rostrum, contiguous procoxae and tuberculate elytra with effaced shoulders. Remarkably, the new genus has a prosternal canal on the ventral side of the prothorax. This feature is characteristic to the weevils of the Old World nominal tribe Aminyopini (=Euderini of some authors) and to the China-Nepal genus Niphadomimus (Typoderini). A phylogenetic molecular analysis using an alignment of 2,956 bp from one mitochondrial and two nuclear fragments outputted a mainly inconclusive topology with low backbone resolution. Terminals with prosternal canal were grouped into four clades not most closely related to each other: Aater cangshanensis gen. et sp. nov., Niphadomimus, African Aminyopini and Asian Aminyopini; the latter three clades each with bootstrap support of 100%. The prosternal canal has either evolved more than once, or reversed once or more, or both. The sister group of Aater gen. nov. cannot be reliably identified and, therefore, the new genus is assigned to Molytinae incertae sedis.
description: Fragmenta Entomologica, Vol. 50 No. 2 (2018)
AN ANALYSIS OF SUPPLY AND DEMAND CONDITIONS FOR CAPE VERDE'S BANANA INDUSTRY
Creators: name: Brito, Herminaldo Sousa
name: Brito, Herminaldo Sousa
Publisher: name: Unknown
Year: 1982
Subjects: Crop Production/Industries

description: The general purpose of this study is to analyze selected factors affecting Cape Verde's ability to increase production and sales of bananas. In this process the export market of Portugal will be examined as it has traditionally been the only export market for Cape Verdian bananas. In specific terms the objectives of this study are: 1) To analyze factors affecting the supply of bananas in Cape Verde; 2) To review trends in demand for bananas in Cape Verde and in Portugal as an attempt to discover potential reasons for the drop in banana exports from Cape Verde; and 3) To suggest additional research and policy considerations which could improve Cape Verde's ability to produce and sell bananas.
Spitzer Observations of CO2 Ice Towards Field Stars in the Taurus Molecular Cloud
Creators: name: Bergin, Edwin A.
name: Melnick, Gary J.
name: Gerakines, Perry A.
name: Neufeld, David A.
name: Whittet, Douglas C. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first Spitzer Infrared Spectrograph observations of the 15.2 micron bending mode of CO2 ice towards field stars behind a quiescent dark cloud. CO2 ice is detected towards 2 field stars (Elias 16, Elias 3) and a single protostar (HL Tau) with anabundance of ~15-20% relative to water ice. CO2 ice is not detected towards the source with lowest extinction in our sample, Tamura 17 (A_V = 3.9m). A comparison of the Elias 16 spectrum with laboratory data demonstrates that the majority of CO2 ice is embedded in a polar H2O-rich ice component, with ~15% of CO2 residing in an apolar H2O-poor mantle. This is the first detection of apolar CO2 towards a field star. We find that the CO2 extinction threshold is A_V = 4m +/- 1m, comparable to the threshold for water ice, but significantly less than the threshold for CO ice, the likely precursor of CO2. Our results confirm CO2 ice forms in tandem with H2O ice along quiescent lines of sight. This argues for CO2 ice formation via a mechanism similar to that responsible for H2O ice formation, viz. simple catalytic reactions on grain surfaces.
description: Accepted by Astrophysical Journal Letters
Rediscovery of Hoplia walterrossii: new localities, first ecological notes, description of the female and conservation issues (Coleoptera: Scarabaeidae)
Creators: name: Uliana, Marco
name: Liberto, Andrea
name: Gallerati, Valerio
name: Patacchiola, Daniel
Publisher: name: Fragmenta Entomologica
Year: 2018

description: Hoplia walterrossii is a species endemic to Molise, Southern Italy, with completely unknown ecology and virtually known only on the holotype, few additional specimens having been merely listed in a recent paper. Following the discovery of various new populations in the field and of old unpublished samples, we provide new information on ecology, phenology, distribution, and morphology, including the description of the female, so far unknown. H. walterrossii is associated to alluvial soils near the coast, and to lowland floodplains, with apparent tolerance for temporarily flooded areas. Adults are active for about one month, from early May to early June, and have been observed mostly on leaves of canes and on young poplars, never on flowers. An attempt of formal IUCN status assignment is provided, giving the species the “Endagered” status. Suitable habitats for H. walterrossii are small residual meadows and, in particular, wetlands which have been subjected to a recent strong reduction due to human activity. This process, that started centuries ago, is still in progress, in spite of the formal identification of these areas as sites of conservation concern.
description: Fragmenta Entomologica, Vol. 50 No. 2 (2018)
ANALYSIS AND EVALUATION OF KOREAN DAIRY CATTLE PROJECT: SPECIAL EMPHASIS ON PROJECT IMPLEMENTATION
Creators: name: Kim, Chung Ho
name: Kim, Chung Ho
Publisher: name: Unknown
Year: 1975
Subjects: Livestock Production/Industries

description: This paper attempts to analyze gaps between policy goals and policy results realized through process of policy implementation, and to investigate the obstacles which make such gaps. Generally, policy goals are set up by central government with ambitions and detailed instruction, however, policy results turn out unsatisfactory when policy is implemented through central and local government units. In connection with such happenings, as case study of a dairy cattle project in which a policy goal was to increase farm incomes, and policy results came out with 1) a large number of farms terminating their participation soon after they joined the project, and 2) poor farm management results among farms remaining in the project.
A new enigmatic radio relic in the low mass cluster Abell 2108
Creators: name: Chatterjee, Swarna
name: Rahaman, Majidul
name: Datta, Abhirup
name: Kale, Ruta
name: Paul, Surajit
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discovery of a radio relic in the northeastern periphery of the cluster Abell 2108 (A2108). A2108 is a part of the uGMRT LOw-MAss Galaxy Cluster Survey (GLOMACS), where our main aim is to search for diffuse radio emission signatures in very sparsely explored low-mass galaxy clusters using uGMRT band-3 (central frequency 400 MHz). We used our uGMRT band-3 data along with the existing archival band-3 uGMRT data to improve image sensitivity. Along with the previously reported southwestern relic, the discovery of the new relic makes A2108 one of the few low-mass clusters hosting double relics. The new relic spans over a region of 610 kpc $\times$ 310 kpc and, interestingly, differs considerably in size and morphology from the other relic. With XMM-Newton science archive data, we also report the tentative detection of a mildly supersonic shock of Mach number $\mathcal{M}_\mathrm{SB}=1.42$ and $\mathcal{M}_\mathrm{T} = 1.43$ from the surface brightness and temperature discontinuities, respectively near this newly found relic. Both the relics in A2108 are found to be significantly under-luminous compared to other double relic systems in the mass-luminosity plane. Though mild supersonic shocks resulting from an off-axis merger could have influenced their origin, we hypothesize that further local environments have played a crucial role in shaping their morphology.
description: 7 pages, 5 figures, Accepted for publication in MNRAS
Scalar Fully-heavy Tetraquark States $QQ^\prime \bar{Q} \bar{Q^\prime}$ in QCD Sum Rules
Creators: name: Yang, Bo-Cheng
name: Tang, Liang
name: Qiao, Cong-Feng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Very recently, the LHCb Collaboration observed distinct structures with the $cc\bar{c}\bar{c}$ in the $J/Ψ$-pair mass spectrum. In this work, we construct four scalar ($J^{PC} = 0^{++}$) $[8_c]_{Q\bar{Q^\prime}}\otimes [8_c]_{Q^\prime \bar{Q}}$ type currents to investigate the fully-heavy tetraquark state $Q Q^\prime \bar{Q} \bar{Q^\prime}$ in the framework of QCD sum rules, where $Q=c, b$ and $Q^\prime = c, b$. Our results suggest that the broad structure around 6.2-6.8 GeV can be interpreted as the $0^{++}$ octet-octet tetraquark states with masses $6.44\pm 0.11$ GeV and $6.52\pm 0.10$ GeV, and the narrow structure around $6.9$ GeV can be interpreted as the $0^{++}$ octet-octet tetraquark states with masses $6.87\pm 0.11$ GeV and $6.96\pm 0.11$ GeV, respectivley. Extending to the b-quark sector,the masses of their fully-bottom partners are found to be around 18.38-18.59 GeV. Additionally, we also analyze the spectra of the $[c\bar{c}][b\bar{b}]$ and $[c\bar{b}] [b \bar{c}]$ tetraquark states, which lie in the range of 12.51-12.74 GeV and 12.49-12.81 GeV, respectively.
description: 18 pages, 1 figures, 2 tables, version published in EPJC
The compact Q=2 Abelian Higgs model in the London limit: vortex-monopole chains and the photon propagator
Creators: name: Chernodub, M. N.
name: Feldmann, R.
name: Ilgenfritz, E. -M.
name: Schiller, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The confining and topological properties of the compact Abelian Higgs model with doubly-charged Higgs field in three space-time dimensions are studied. We consider the London limit of the model. We show that the monopoles are forming chain-like structures (kept together by ANO vortices) the presence of which is essential for getting simultaneously permanent confinement of singly-charged particles and breaking of the string spanned between doubly-charged particles. In the confinement phase the chains are forming percolating clusters while in the deconfinement (Higgs) phase the chains are of finite size. The described picture is in close analogy with the synthesis of the Abelian monopole and the center vortex pictures in confining non--Abelian gauge models. The screening properties of the vacuum are studied by means of the photon propagator in the Landau gauge.
description: 27 pages, 37 figures
Properties of a protoneutron star in the Effective Field Theory
Creators: name: Bednarek, Ilona
name: Manka, Ryszard
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The complete form of the equation of state of strangeness rich proto-neutron and neutron star matter has been obtained. The currently obtained lower value of the Lambda Lambda potential at the level of 5 MeV permits the existence of additional parameter set which reproduces the weaker Lambda Lambda interaction. The effects of the strength of hyperon-hyperon interactions on the equations of state constructed for the chosen parameter set have been analyzed. It has been shown that replacing the strong Y-Y interaction model by the weak one introduces large differences in the composition of a proto-neutron star matter both in the strange and non-strange sectors. Also concentrations of neutrinos have been significantly altered in proto-neutron star interiors. The performed calculations have indicated that the change of the hyperon-hyperon coupling constants affects the value of the proto-neutron star maximum mass.
description: 20 pages, 12 figures, revtex4
Swap distance minimization in SOV languages. Cognitive and mathematical foundations
Creators: name: Ferrer-i-Cancho, Ramon
name: Namboodiripad, Savithry
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Distance minimization is a general principle of language. A special case of this principle in the domain of word order is swap distance minimization. This principle predicts that variations from a canonical order that are reached by fewer swaps of adjacent constituents are lest costly and thus more likely. Here we investigate the principle in the context of the triple formed by subject (S), object (O) and verb (V). We introduce the concept of word order rotation as a cognitive underpinning of that prediction. When the canonical order of a language is SOV, the principle predicts SOV < SVO, OSV < VSO, OVS < VOS, in order of increasing cognitive cost. We test the prediction in three flexible order SOV languages: Korean (Koreanic), Malayalam (Dravidian), and Sinhalese (Indo-European). Evidence of swap distance minimization is found in all three languages, but it is weaker in Sinhalese. Swap distance minimization is stronger than a preference for the canonical order in Korean and especially Malayalam.
THE PROFITABILITY ANALYSIS OF BEAN PRODUCTION IN NICARAGUA
Creators: name: Ishikawa, Yuki
name: Ishikawa, Yuki
Publisher: name: Unknown
Year: 1999
Subjects: Crop Production/Industries

description: In Nicaragua, government policies have historically favored agro-export industries, such as coffee, cotton and sugar. In the early- 1990, the government began to implement policies favoring small-scale farmers cropping beans and maize. However, bean yields are still low. Since 1990, few studies have focused on Nicaragua's second most important crop, beans. This study analyzes record-keeping (RK) data collected from 15 small bean farmers located in the Carazo and Masaya regions. The study assesses costs and patterns of input and labor use and the profitability of bean production. Five farmers among the sample grew traditional bean varieties and ten modem farmers cropped improved bean varieties. The study found that the modem farmers intensively applied agrochemical input, while the traditional farmers applied only fertilizer and insecticide, and tended to substitute herbicide for manual weed control. Budget analysis showed that the modem farmers earned higher profits than the traditional farmers due to their higher yields. Bean yield was the most influential factor affecting profitability, while input and labor costs were not related to profitability. Regression analysis showed that the dummy variable "modem varieties", was the key variable affecting bean yield, and accounted for a 427kg/ha yield increase over traditional varieties. While promising, these results can not be generalized to the whole country - given the relatively small sample size and because farmers in only one region of the country were included in the sample. Thus, additional RK studies are recommended, and these studies should be carried out in other regions of the country and include more farmers.
Construction and Interim Performance of Silica Sand-Asphalt Surfacing
Creators: name: Florence, Robert L.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1965
Subjects: subject: Transportation Engineering

description: The report submitted herewith emanates from continuing efforts to develop sand-asphalt surfacing to a high degree of perfection and as a possible alternative to Class I, Type A, bituminous concrete surfaces. This type of surface excels in skid-resistance and may evolve as a preferred method of surface renewal and de-slicking for worn pavements which are otherwise structurally substantial. This report is concerned principally with observations afforded by the aforenamed, State construction project; it is, in that sense, an interim report.
Laboratory Test Results on Concrete Mixtures Containing Water-Reducing, Set-Retarding Admixtures
Creators: name: Havens, James H.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1965
Subjects: subject: Transportation Engineering

description: This Special Provision covers the requirements for materials and construction procedures for water-reducing, set-retarding admixtures to be used in the construction of concrete bridge superstructures.
Multiparametric Quantum Algebras and the Cosmological Constant
Creators: name: Krishnan, Chethan
name: Di Napoli, Edoardo
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: With a view towards applications for de Sitter, we construct the multi-parametric $q$-deformation of the $so(5,\IC)$ algebra using the Faddeev-Reshetikhin-Takhtadzhyan (FRT) formalism.
description: v4: cosmetic changes from the published version
Using Discrete Choice Experiments to Derive Individual-Specific WTP Estimates for Landscape Improvements under Agri-Environmental Schemes: Evidence from the Rural Environment Protection Scheme in Ireland
Creators: name: Campbell, Danny
name: Hutchinson, W. George
name: Scarpa, Riccardo
name: Campbell, Danny
name: Hutchinson, W. George
name: Scarpa, Riccardo
Publisher: name: Unknown
Year: 2006
Subjects: Environmental Economics and Policy

description: Reported in this paper are the findings from two discrete choice experiments that were carried out to address the value of a number of farm landscape improvement measures within the Rural Environment Protection (REP) Scheme in Ireland. Image manipulation software is used to prepare photorealistic simulations representing the landscape attributes across three levels to accurately represent what is achievable within the Scheme. Using a mixed logit specification willingness to pay (WTP) distributions based on the parameter estimates obtained from the individual conditional distributions are derived. These estimates are subsequently adjusted and combined to account for baselines and levels of improvement resulting from the implementation of the REP Scheme. Individual-specific WTP estimates are thus obtained for the contribution of the Scheme to rural landscapes and are subsequently contrasted with the average cost of the Scheme across the Irish adult population. Results indicate that the Scheme contributes substantial benefits to rural landscapes.
Developing Elementary Federated Learning Algorithms Leveraging the ChatGPT
Creators: name: Popovic, Miroslav
name: Popovic, Marko
name: Kastelan, Ivan
name: Djukic, Miodrag
name: Basicevic, Ilija
Publisher: name: arXiv
Year: 2023
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The Python Testbed for Federated Learning Algorithms is a simple Python FL framework easy to use by ML&AI developers who do not need to be professional programmers, and this paper shows that it is also amenable to emerging AI tools. In this paper, we successfully developed three elementary FL algorithms using the following three steps process: (i) specify context, (ii) ask ChatGPT to complete server and clients' callback functions, and (iii) verify the generated code.
description: 4 pages, 6 tables, submitted to TELFOR 2023, Published by IEEE Xplore
Two new species of the flea beetle genus Psylliodes Latreille of the montana species-group from Eastern Africa (Coleoptera: Chrysomelidae)
Creators: name: Biondi, Maurizio
name: D'Alessandro, Paola
Publisher: name: Fragmenta Entomologica
Year: 2018

description: In this paper, Psylliodes afromontana sp. nov. and P. shira sp. nov., both from Eastern Africa [Kenya (Kikuyu Escarpment) and Tanzania (Kilimanjaro) respectively], are described. The two new species are attributed to the montana species-group, currently including four other wingless species occurring in the montane forests of Kenya and Tanzania: Psylliodes montana Weise, P. kikuyana Biondi, P. masai Biondi, P. manobioides Nadein. Micrographs of diagnostic characters, comprehending male and female genitalia are supplied. Ecological data for each species, including habitat preference, and phenology are also reported.
description: Fragmenta Entomologica, Vol. 50 No. 2 (2018)
Notes on genus Epitrichius Tagawa, 1941 in Vietnam, with description of a new species and a new synonym (Coleoptera: Scarabaeidae, Cetoniinae)
Creators: name: Ricchiardi, Enrico
Publisher: name: Fragmenta Entomologica
Year: 2018

description: The study of several specimens of Epitrichius recently caught in central and southern Vietnam allowed to put in synonymy one species and to describe a new one, which extends considerably southwards the distribution area of the genus.
description: Fragmenta Entomologica, Vol. 50 No. 2 (2018)