cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Effects of Trading and Banking in the SO2 Allowance Market
Creators: name: Burtraw, Dallas
name: Mansur, Erin T.
name: Burtraw, Dallas
name: Mansur, Erin T.
Publisher: name: Unknown
Year: 1999
Subjects: subject: Environmental Economics and Policy
subject: acid rain
subject: sulfur dioxide
subject: trading
subject: benefit-cost analysis
subject: Clean Air Act

description: The 1990 Clean Air Act Amendments initiated a dramatic reduction in emissions of sulfur dioxide and nitrogen oxides by electric power plants. This paper provides an evaluation of the environmental and public health consequences of the trading and banking provisions of Title IV. A sizable shift in the geographic location of emissions under Title IV (in some states of over 20 percent of emissions after Title IV is implemented) is attributable to trading and/or to banking. There has been considerable concern that this shift in emissions would cause harm to downwind areas due to long-range transport of pollution. We find the resulting change in atmospheric concentrations and deposition of pollutants, and the change in monetized health benefits, are most unfavorable in the regions where emissions increase. In the East and Northeast including New York State, an area of particular concern, health benefits increase and deposition of sulfur decreases slightly as a result of trading. In the aggregate, trading results in health related benefits nationally of nearly $570 million in 1995 and about $125 million in 2005. The reason is that the geographic shift in emissions away from more populated areas leads to a decrease in exposure to harmful particulates. Meanwhile, cost savings from trading represent about 13 percent of compliance costs in the No Trading scenario in 1995, and about 37 percent in 2005. Banking has the anticipated effect of changing the timing of emissions. Banking causes a reduction of up to 20 percent in 1995 in some states and a commensurate increase in 2005. The geographic pattern of emission changes as a consequence is varied; some states reduce emissions in 2005 as a result of banking. These changes are small compared to the overall reduction in emissions, sulfur deposition, and human health benefits expected to result from the program.
Competing nodal d-wave superconductivity and antiferromagnetism
Creators: name: Xu, Xiao Yan
name: Grover, Tarun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Competing unconventional superconductivity and antiferromagnetism widely exist in several strongly correlated quantum materials whose direct simulation generally suffers from fermion sign problem. Here we report unbiased Quantum Monte Carlo (QMC) simulations on a sign-problem-free repulsive toy model with same onsite symmetries as the standard Hubbard model on a 2D square lattice. Using QMC, supplemented with mean-field and continuum field-theory arguments, we find that it hosts three distinct phases: a nodal d-wave phase, an antiferromagnet, and an intervening phase which hosts coexisting antiferromagnetism and nodeless d-wave superconductivity. The transition from the coexisting phase to the antiferromagnet is described by the 2+1-D XY universality class, while the one from the coexisting phase to the nodal d-wave phase is described by the Heisenberg-Gross-Neveu theory. The topology of our phase diagram resembles that of layered organic materials which host pressure tuned Mott transition from antiferromagnet to unconventional superconductor at half-filling.
description: 6+9 pages, 4+9 figures
The role of quasi-momentum in the resonant dynamics of the atom-optics kicked rotor
Creators: name: Wimberger, Sandro
name: Sadgrove, Mark
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the effect of the initial atomic momentum distribution on the dynamics of the atom-optical realisation of the quantum kicked rotor. The atoms are kicked by a pulsed optical lattice, the periodicity of which implies that quasi-momentum is conserved in the transport problem. We study and compare experimentally and theoretically two resonant limits of the kicked rotor: in the vicinity of the quantum resonances and in the semiclassical limit of vanishing kicking period. It is found that for the same experimental distribution of quasi-momenta, significant deviations from the kicked rotor model are induced close to quantum resonance, while close to the classical resonance (i.e. for small kicking period) the effect of the quasi-momentum vanishes.
description: 10 pages, 4 figures, to be published in J. Phys. A, Special Issue on 'Trends in Quantum Chaotic Scattering'
Quantum repeaters based on concatenated bosonic and discrete-variable quantum codes
Creators: name: Rozpędek, Filip
name: Noh, Kyungjoo
name: Xu, Qian
name: Guha, Saikat
name: Jiang, Liang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an architecture of quantum-error-correction-based quantum repeaters that combines techniques used in discrete- and continuous-variable quantum information. Specifically, we propose to encode the transmitted qubits in a concatenated code consisting of two levels. On the first level we use a continuous-variable GKP code encoding the qubit in a single bosonic mode. On the second level we use a small discrete-variable code. Such an architecture has two important features. Firstly, errors on each of the two levels are corrected in repeaters of two different types. This enables for achieving performance needed in practical scenarios with a reduced cost with respect to an architecture for which all repeaters are the same. Secondly, the use of continuous-variable GKP code on the lower level generates additional analog information which enhances the error-correcting capabilities of the second-level code such that long-distance communication becomes possible with encodings consisting of only four or seven optical modes.
description: 17 + 26 pages, 17 figures. v2: additional discussions of generation of higher-level-encoded states and of the secret-key rate performance metric; detailed simulation error analysis; restructuring of the sections with the new "Methods" section; published version. See also the related work by Fukui et al., arXiv:2011.14876
A Study of the Interplay of Emotional Intelligence and Peer Relationships Among Secondary School Girls in Ponda, Goa
Creators: name: MORE, VINAYAK
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 390306
subject: Secondary education
classificationCode: 390406
subject: Gender, sexuality and education
classificationCode: 390407
subject: Inclusive education
classificationCode: 390412
subject: Teacher and student wellbeing
classificationCode: 520502
subject: Gender psychology
classificationCode: 520503
subject: Personality and individual differences
classificationCode: 520505
subject: Social psychology
classificationCode: 520304
subject: Health psychology
classificationCode: 520101
subject: Child and adolescent development

description: The research study investigates the relationship between Emotional Intelligence (EI) and Peer Relationships among secondary school girls in Ponda, Goa. Emotional intelligence is the ability to perceive, understand, and manage emotions effectively, plays a crucial role in adolescent stage development and social interactions. Peer relationships, particularly during adolescence, significantly impact individuals' social and emotional well-being. The current study aimed to explore how emotional intelligence influences peer relationship dynamics among secondary school girls in a specific geographic context. The research employs a descriptive Research approach, incorporating survey method with quantitative measures to provide a comprehensive understanding of the phenomenon. A standardized questionnaire on emotional intelligence, adapted from A.K. Singh and Shruti Narain's Emotional Intelligence Scale, was administered to assess participants' emotional intelligence levels and a peer relationship questionnaire with components Peer Interaction, Inter-Personal Relationship, and Social Skills was developed and administered to gather insights into the nature and quality of peer interactions among the participants. The sample was of secondary school girls of VIII and IX standard from various schools in Ponda, Goa, selected through stratified random sampling. The findings of this study were aimed to contribute to the existing literature on emotional intelligence and peer relationships among adolescents, with implications for educational practices, counseling interventions, and youth development programs. By understanding the interplay between emotional intelligence and peer relationship dynamics, educators and policymakers can devise strategies to promote positive social-emotional development and enhance the overall well-being of secondary school girls.
EFFECT OF INDIRECT TAXATION ON ECONOMIC SUSTAINABILITY IN NIGERIA 2002-2022
Creators: name: Ogechukwu, Maria, Ngwoke
Publisher: name: ZAP Journal
Year: 2024
Subjects: Indirect taxes, Economic sustainability, Value added tax, Custom and excise duties

description: The research investigated effect indirect taxes economic sustainability in Nigeria with focus on Nigerian economy. The study's specific objectives were to determine the effect of value added tax on real gross domestic product and evaluate the effect of custom and excise duties on real gross domestic product in Nigeria; The ex-post facto design method was used in this study while secondary data were used were gathered from various governmental agencies such as Federal Inland Revenue Service (IFRS) 2022 Statistics Report, the World Bank, UNDP, and OECD Stat. covering a period of 21years (2002-2022). Multiple regression models were employed via the Ordinary Least Square (OLS) method and it was found that value added tax, custom and excise duties have significant effect on Real Gross Domestic Product in Nigeria as p-value of 0.00 < 0.05. the study concludes that Nigeria's real gross domestic product was significantly impacted by indirect taxation from 2002 to 2022. The study recommends that the values of indirect taxes which has contributed to the Nigerian economy should also be raised.
Representation matching for delegated quantum computing
Creators: name: Yang, Yuxiang
name: Hayashi, Masahito
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Many quantum computational tasks have inherent symmetries, suggesting a path to enhancing their efficiency and performance. Exploiting this observation, we propose representation matching, a generic probabilistic protocol for reducing the cost of quantum computation in a quantum network. We show that the representation matching protocol is capable of reducing the communication or memory cost to almost minimum in various tasks, including remote execution of unitary gate arrays, permutation gates and unitary conjugation, as well as the storage and retrieval of unitary gates.
description: 11 pages, 7 figures; close to published version
Microstructure and X-Ray Diffraction analysis of Al-Cu Couples Diffused at High Temperature
Creators: name: Jaime HINOJOSA-TORRES, Juan MANUELACEVES-HERN?NDEZ
Publisher: name: Metallurgy and Materials Science Research Institute, Chulalongkorn University
Year: 2015
Subjects: Al-Cu Couples,?2 phase plate like,? phase plate like,Welding line,Weld bead

description: 2, 25, Journal of Metals, Materials and Minerals
Simplified Marginal Effects in Discrete Choice Models
Creators: name: Anderson, Soren T.
name: Newell, Richard G.
name: Anderson, Soren T.
name: Newell, Richard G.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Research Methods/ Statistical Methods
subject: logit
subject: probit
subject: discrete choice
subject: binary choice
subject: marginal effect
subject: data normalization

description: We show that after a simple normalization of explanatory variables so that they equal zero at some desired reference point, marginal effects for continuous variables in probit and logit models simplify dramatically, becoming a function of only the estimated constant term. We present similar simplifications for computation of the asymptotic variance of marginal effects, as well as for the effects of dummy variables on predicted probabilities. We provide a simple table, which in combination with raw probit or logit estimates, is all one needs to compute the desired effects.
Processing of Nano Fillers in Nitrile Rubber  A Novel Technique.
Creators: name: Abitha V. K., Ajay VASUDEO RANE
Publisher: name: Metallurgy and Materials Science Research Institute, Chulalongkorn University
Year: 2015
Subjects: Nano-TiO2,Nano Silica,NBR,Liquid NBR,Morphology,Mechanical properties,Microstructure characterization

description: 2, 25, Journal of Metals, Materials and Minerals
BCI learning induces core-periphery reorganization in M/EEG multiplex brain networks
Creators: name: Corsi, Marie-Constance
name: Chavez, Mario
name: Schwartz, Denis
name: George, Nathalie
name: Hugueville, Laurent
name: Kahn, Ari E.
name: Dupont, Sophie
name: Bassett, Danielle S.
name: Fallani, Fabrizio De Vico
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: Brain-computer interfaces (BCIs) constitute a promising tool for communication and control. However, mastering non-invasive closed-loop systems remains a learned skill that is difficult to develop for a non-negligible proportion of users. The involved learning process induces neural changes associated with a brain network reorganization that remains poorly understood. To address this inter-subject variability, we adopted a multilayer approach to integrate brain network properties from electroencephalographic (EEG) and magnetoencephalographic (MEG) data resulting from a four-session BCI training program followed by a group of healthy subjects. Our method gives access to the contribution of each layer to multilayer network that tends to be equal with time. We show that regardless the chosen modality, a progressive increase in the integration of somatosensory areas in the alpha band was paralleled by a decrease of the integration of visual processing and working memory areas in the beta band. Notably, only brain network properties in multilayer network correlated with future BCI scores in the alpha2 band: positively in somatosensory and decision-making related areas and negatively in associative areas. Our findings cast new light on neural processes underlying BCI training. Integrating multimodal brain network properties provides new information that correlates with behavioral performance and could be considered as a potential marker of BCI learning.
description: This is the version of the article before editing, as submitted by an author to the Journal of Neural Engineering. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online athttp://iopscience.iop.org/article/10.1088/1741-2552/abef39
The Ancillary Carbon Benefits of SO2 Reductions from a Small-Boiler Policy in Taiyuan, PRC
Creators: name: Morgenstern, Richard D.
name: Krupnick, Alan J.
name: Zhang, Xuehua
name: Morgenstern, Richard D.
name: Krupnick, Alan J.
name: Zhang, Xuehua
Publisher: name: Unknown
Year: 2002
Subjects: subject: Environmental Economics and Policy
subject: carbon
subject: air pollution
subject: informal sector
subject: ancillary benefits
subject: abatement costs
subject: survey

description: To reduce carbon emissions worldwide, it makes sense to consider the possibility of developed countries paying for carbon reductions in developing countries. Developing countries may be interested in such activities if the ancillary air pollution benefits are large. This paper reports on an RFF survey of the emissions benefits (and costs) of reducing sulfur dioxide (SO2) emissions from small, coal-burning boilers in Taiyuan, an industrial, northern Chinese city that recently banned uncontrolled coal combustion in certain small boilers in the downtown area. We find significant carbon benefits in percentage terms-on the order of 50% to 95% reduction-associated with this SO2 control policy, with large reduction potential elsewhere in Taiyuan and China. While the cost for boilers that switched out of coal was almost $3,600 per ton of SO2 reduced, these ancillary carbon reductions are truly "free" from a social cost perspective.
James M. Crawford Papers on the Yuman Languages
Creators: name: Jimulla, Viola
name: San Diego, Edward
name: San Diego, Johnnie
name: Sinyella, Lorenzo
name: Sundust, Perry
name: Crawford, James Mack
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2015

description: The Papers consist of wordlists for four Yuman languages: Cocopa (consultants Edward and Johnnie San Diego), Havasupai (consultant Lorenzo Sinyella), Maricopa (consultant Perry Sundust), and Yavapai (consultant Viola Jimulla).
Smijem li i zašto je dobro pohraniti svoj rad u repozitorij? Autorsko-pravna pitanja i otvorena znanost
Creators: name: Macan, Bojan
name: Zlodi, Iva Melinščak
Publisher: name: Zenodo
Year: 2021
Subjects: otvoreni pristup
otvorena znanost
autorsko pravo
otvorene licencije
samoarhiviranje

description: U okviru izlaganja autori su objasnili važnost autorskopravnih pitanja i korištenja otvorenih licencija u ostvarivanju otvorenog pristupa i otvorene znanosti. Razmotrena su pitanja koja se odnose na različite vrste publikacija, različite verzije radova koje nastaju tijekom procesa objavljivanja, politike izdavača, i uloge različitih dionika (autora, knjižničara, urednika repozitorija). Prikazane su promjene koje u znanstveno izdavaštvo donosi Plan S. Predložena su moguća rješenja za samoarhiviranje koja su na raspolaganju hrvatskim autorima.
description: Funding: National Initiatives for Open Science in Europe (NI4OS-Europe) & OpenAIRE Advancing Open Scholarship (OpenAIRE-Advance).
Microstructure Based Finite Element Simulation of JCO Forming Process for Pipeline X65
Creators: name: Wut THIANNGOEN, Saranya KINGKLANG
Publisher: name: Metallurgy and Materials Science Research Institute, Chulalongkorn University
Year: 2015
Subjects: X65 pipeline steel,Multi-scale modeling,RVE,FE simulation

description: 2, 25, Journal of Metals, Materials and Minerals
Stability in Designer Gravity
Creators: name: Hertog, Thomas
name: Hollands, Stefan
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: We study the stability of designer gravity theories, in which one considers gravity coupled to a tachyonic scalar with anti-de Sitter boundary conditions defined by a smooth function W. We construct Hamiltonian generators of the asymptotic symmetries using the covariant phase space method of Wald et al.and find they differ from the spinor charges except when W=0. The positivity of the spinor charge is used to establish a lower bound on the conserved energy of any solution that satisfies boundary conditions for which $W$ has a global minimum. A large class of designer gravity theories therefore have a stable ground state, which the AdS/CFT correspondence indicates should be the lowest energy soliton. We make progress towards proving this, by showing that minimum energy solutions are static. The generalization of our results to designer gravity theories in higher dimensions involving several tachyonic scalars is discussed.
description: 29 pages
New Anderson-Based Polyoxometalate Covalent Organic Frameworks as Electrodes for Energy Storage Boosted Through Keto-Enol Tautomerization
Creators: name: Pakulski, Dawid
name: Gorczyński, Adam
name: Brykczyńska, Daria
name: Montes-García, Verónica
name: Czepa, Włodzimierz
name: Janica, Iwona
name: Bielejewski, Michał
name: Kubicki, Maciej
name: Patroniak, Violetta
name: Samorì, Paolo
name: Ciesielski, Artur
Publisher: name: Zenodo
Year: 2023

description: The unique electrochemical properties of polyoxometalates (POMs) render them ideal components for thefabrication of next-generation high-performance energy storage systems. However, their practical applications have beenhindered by their high solubility in common electrolytes. This problem can be overcome by the effective hybridization ofPOMs with other materials. Here we present the design and synthesis of two novel polyoxometalate-covalent organicframeworks (POCOF) via one-pot solvothermal strategy between an amino-functionalized Anderson-type POM and atrialdehyde-based building unit. We show that structural and functional complexity can be enriched by adding hydroxylgroups in the 2,4,6 position to the benzene-1,3,5-tricarbaldehyde allowing to exploit for the first time in POCOFs theketo-enol tautomerization as additional feature to impart greater chemical stability to the COFs and enhanced propertiesleading to large specific surface area (347 m2/g) and superior electrochemical performance of the POCOF-1 electrodes,when compared with POCOF-2 electrodes that possess only imine-type linkage and with pristine POM electrodes.Specifically, POCOF-1 electrodes display remarkable specific, areal, and volumetric capacitance (125 F/g, 248 mF/cm2and 41.9 mF/cm3, respectively) at a current density of 0.5 A/g, a maximum energy density (56.2 Wh/kg), a maximumpower density (3.7 kW/kg) and an outstanding cyclability (90 % capacitance retention after 5000 cycles).
description: This work was supported by the National Science Centre,Poland (grant no. 2020/36/C/ST5/00247 and UMO-2020/39/D/ST4/01182) and IDUB-AMU programme “50x50: fiftygrants for 50 young scientists—038/04/NŚ/0040” as well asthe the Agence Nationale de la Recherche through theInterdisciplinary Thematic Institute SysChem via the IdExUnistra (ANR-10-IDEX-0002) within the program Inves-tissement d’Avenir, the International Center for FrontierResearch in Chemistry (icFRC), and the Institut Universi-taire de France (IUF).
Does Reducing Malaria Improve Household Living Standards?
Creators: name: Laxminarayan, Ramanan
name: Laxminarayan, Ramanan
Publisher: name: Unknown
Year: 2003
Subjects: subject: Health Economics and Policy
subject: malaria
subject: living standards
subject: disease

description: Living in malaria-endemic regions places an economic burden on households even if they do not actually suffer an episode of malaria. Households living with endemic malaria are less likely to have access to economic opportunities and may have to modify agricultural practices and other household behavior to adapt to their disease environment. Data from Vietnam demonstrate that reductions in malaria incidence through government-financed malaria control programs can contribute to higher household income for all households living in endemic areas. Empirically, a 10% decrease in malaria cases at the national level translates to a roughly US $30 million annual economic benefit in the form of improved living standards.
Optimal Product Proliferation in Monopoly: A Dynamic Analysis
Creators: name: Lambertini, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-P/01 Economia politica

description: The monopolist’s incentives towards product proliferation are evaluated in an optimal control model considering three alternative regimes: profit-seeking; social planning; and a hybrid case with monopoly pricing and a regulator setting product innovation to maximise welfare. In equilibtium, the profitseeking firm supplies a socially suboptimal number of varieties to reduce cannibalisation while the social planner exploits the same effect to satisfy consumers’ love for variety and decrease the market price of all products. In terms of the Schumpeter vs Arrow debate on the relationship between market structure and innovation incentives, the results obtained in this model have a definite Arrovian flavor.
Characterizing a new class of variability in GRS 1915+105 with simultaneous INTEGRAL/RXTE observations
Creators: name: Hannikainen, D. C.
name: Rodriguez, J.
name: Vilhu, O.
name: Hjalmarsdotter, L.
name: Zdziarski, A. A.
name: Belloni, T.
name: Poutanen, J.
name: Wu, K.
name: Shaw, S. E.
name: Beckmann, V.
name: Hunstead, R. W.
name: Pooley, G. G.
name: Westergaard, N. J.
name: Mirabel, I. F.
name: Hakala, P.
name: Castro-Tirado, A.
name: Durouchoux, Ph.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the analysis of 100 ks INTEGRAL observations of the Galactic microquasar GRS 1915+105. We focus on INTEGRAL Revolution number 48 when the source was found to exhibit a new type of variability as preliminarily reported in Hannikainen et al. (2003). The variability pattern, which we name $ξ$, is characterized by a pulsing behaviour, consisting of a main pulse and a shorter, softer, and smaller amplitude precursor pulse, on a timescale of 5 minutes in the JEM-X 3-35 keV lightcurve. We also present simultaneous RXTE data. From a study of the individual RXTE/PCA pulse profiles we find that the rising phase is shorter and harder than the declining phase, which is opposite to what has been observed in other otherwise similar variability classes in this source. The position in the colour-colour diagram throughout the revolution corresponds to State A (Belloni et al. 2000) but not to any previously known variability class. We separated the INTEGRAL data into two subsets covering the maxima and minima of the pulses and fitted the resulting two broadband spectra with a hybrid thermal--non-thermal Comptonization model. The fits show the source to be in a soft state characterized by a strong disc component below ~6 keV and Comptonization by both thermal and non-thermal electrons at higher energies.
description: Accepted for publication in A&A. 11 pages, 10 figures, 4 in colour. Original figures can be found at http://www.astro.helsinki.fi/~diana/grs1915_rev48. Author affiliations corrected
As Good as New. How to Successfully Recycle English GPT-2 to Make Models for Other Languages
Creators: name: de Vries, Wietse
name: Nissim, Malvina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Large generative language models have been very successful for English, but other languages lag behind, in part due to data and computational limitations. We propose a method that may overcome these problems by adapting existing pre-trained models to new languages. Specifically, we describe the adaptation of English GPT-2 to Italian and Dutch by retraining lexical embeddings without tuning the Transformer layers. As a result, we obtain lexical embeddings for Italian and Dutch that are aligned with the original English lexical embeddings. Additionally, we scale up complexity by transforming relearned lexical embeddings of GPT-2 small to the GPT-2 medium embedding space. This method minimises the amount of training and prevents losing information during adaptation that was learned by GPT-2. English GPT-2 models with relearned lexical embeddings can generate realistic sentences in Italian and Dutch. Though on average these sentences are still identifiable as artificial by humans, they are assessed on par with sentences generated by a GPT-2 model fully trained from scratch.
description: Findings of ACL 2021 Camera Ready
Fiscal Rules in a Highly Distorted Economy
Creators: name: Marattin, Luigi
name: Marzo, Massimiliano
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-P/01 Economia politica

description: The objective of this paper is to investigate the optimality of EMU fiscal rules from a welfare perspective. We compute welfare-maximizing feedback coefficients for monetary and fiscal rules in a NK-DSGE with a high number of nominal and real distortions, calibrated on the Euro-area data. The framework includes imperfect competition, costly capital accumulation, consumption habits, price and wage stickiness, distortionary taxation on consumption, labor and capital income. Fiscal policy responds, alternatively, to total deficit, total government liabilities, and a linear combination of both targets. We show that the liabilities rule is welfare superior, but it does not provide enough output stabilization if not coupled with a non-zero response of monetary policy to output; optimal feedback coefficient are larger under debt targeting rather than deficit; under the
current specification, a SGP-like rule seems highly suboptimal.
Informal Sector Pollution Control: What Policy Options Do We Have?
Creators: name: Blackman, Allen
name: Blackman, Allen
Publisher: name: Unknown
Year: 2000
Subjects: subject: Environmental Economics and Policy
subject: informal sector
subject: environmental policy
subject: Latin America
subject: Mexico

description: In developing countries, urban clusters of informal firms such as brick kilns and leather tanneries can create severe pollution problems. However, these firms are quite difficult to regulate for a variety of technical and political reasons. Drawing on the literature, this paper first develops a list of feasible environmental management policies. It then examines how these policies have fared in four independent efforts to control emissions from informal brick kilns in northern Mexico. The case studies suggest that: (i) conventional command and control process standards are generally only enforceable when buttressed by peer monitoring, (ii) surprisingly, clean technologies can be successfully diffused even when they raise variable costs, in part because early adopters have an economic incentive to promote further adoption, (iii) boycotts of "dirty" goods sold in informal markets are unenforceable, (iv) well-organized informal firms can block implementation of costly abatement strategies such as relocation, and (v) private-sector-led initiatives may be best suited for informal sector pollution control.
Genetic Programming, Validation Sets, and Parsimony Pressure
Creators: name: Gagné, Christian
name: Schoenauer, Marc
name: Parizeau, Marc
name: Tomassini, Marco
Publisher: name: arXiv
Year: 2006
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Fitness functions based on test cases are very common in Genetic Programming (GP). This process can be assimilated to a learning task, with the inference of models from a limited number of samples. This paper is an investigation on two methods to improve generalization in GP-based learning: 1) the selection of the best-of-run individuals using a three data sets methodology, and 2) the application of parsimony pressure in order to reduce the complexity of the solutions. Results using GP in a binary classification setup show that while the accuracy on the test sets is preserved, with less variances compared to baseline results, the mean tree size obtained with the tested methods is significantly reduced.
Unprotected Resources and Voracious World Markets
Creators: name: Margolis, Michael
name: Shogren, Jason F.
name: Margolis, Michael
name: Shogren, Jason F.
Publisher: name: Unknown
Year: 2002
Subjects: subject: International Relations/Trade
subject: international trade
subject: property rights
subject: natural resources
subject: environment
subject: second best
subject: institutional change
subject: development

description: The Theory of the Second Best implies that any country with less-than-ideal resources can lose from international trade. Recently it has been suggested this means the South (poor countries) are better off suppressing trade with the North, especially trade in natural resource products, since the North has better developed rights to protect its natural resources. Here we show that the suppression of such trade may also impede the development of property rights in the South, but that even taking this into account, trade liberalization need not improve Southern welfare. We find that within a cone of world prices on the boundary of which lies the South's autarky price vector, welfare losses still occur even when local governments in the South make optimal choices to enclose the hinterlands. Corollary to the losses, the South can gain from tariffs or quotas and, within a proper subset of the cone of loss, can suffer when the prices of its exports rise.
Assessing Active Labor Market Policies in Transition Economies
Creators: name: Lehmann, Hartmut
name: Kluve, Jochen
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-P/01 Economia politica

description: With the beginning of economic reform in the formerly centrally planned economies of Central and Eastern Europe (CEE), open unemployment rapidly reached comparable levels to those in Western economies. Governments in the region reacted to this rise by adopting active labor market policies (ALMP) as an important tool in the fight against unemployment. Before reviewing the evidence on the efficacy of such policies we look at the scope and the rationale of ALMP measures in a transitional context. Since government budgets are very tight in these countries it is important to evaluate ALMP in a rigorous fashion. The paper analyzes macroeconometric and microeconometric
methods of program evaluation, as they were applied in transition economies. Both these
approaches have a raison d’être and should be understood as complementing. Providing a selective
review of the literature, some of the strengths and the pitfalls of the two approaches are highlighted.
We also point to the lessons one can draw from the surveyed studies for a better understanding of
how active measures affect labor market outcomes in this set of countries.
Recent results for the Landau-Lifshitz equation
Creators: name: de Laire, André
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 82D40, 35C06, 35B44, 35C20, 53C44, 35Q55, 58E20, 35Q55, 35J20, 35A15, 35C07, 35B35, 37K05, 35C08, 35A01, 35L05, 35Q60, 37K40, 35R05,

description: We give a survey on some recent results concerning the Landau-Lifshitz equation, a fundamental nonlinear PDE with a strong geometric content, describing the dynamics of the magnetization in ferromagnetic materials. We revisit the Cauchy problem for the anisotropic Landau-Lifshitz equation, without dissipation, for smooth solutions, and also in the energy space in dimension one. We also examine two approximations of the Landau-Lifshitz equation given by of the Sine-Gordon equation and cubic Schrödinger equations, arising in certain singular limits of strong easy-plane and easy-axis anisotropy, respectively. Concerning localized solutions, we review the orbital and asymptotic stability problems for a sum of solitons in dimension one, exploiting the variational nature of the solitons in the hydrodynamical framework. Finally, we survey results concerning the existence, uniqueness and stability of self-similar solutions (expanders and shrinkers) for the isotropic Landau-Lifshitz equation with Gilbert term. Since expanders are associated with a singular initial condition with a jump discontinuity, we also review their well-posedness in spaces linked to the BMO space.
description: 43pages, link https://rdcu.be/cmCdM
A Schumpeterian Growth Model with Heterogenous Firms
Creators: name: Minniti, Antonio
name: Parello, Carmelo Pierpaolo
name: Segerstrom, Paul S.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-P/01 Economia politica

description: A common assumption in the Schumpeterian growth literature is that the innovation size
is constant and identical across industries. This is in contrast with the empirical evidence which shows that: (i) the innovation size is far from being identical across industries; a (ii) the size distribution of profit returns from innovation is highly skewed toward the low value side, with a long tail on the high value side. In the present paper, we develop a Schumpeterian growth model that is consistent with this evidence. In particular, we assume that when a firm innovates, the size of its quality improvement is the result of a random draw from a Pareto distribution. This enables us to extend the class of quality-ladder growth models to encompass  firm heterogeneity. We study the
policy implications of this new set-up numerically and find that it is optimal to heavily subsidize R&D for plausible parameter values. Although it is optimal to tax R&D for some parameter values,this case only occurs when the steady-state rate of economic growth is very low.
Sebecosuchia
Creators: name: Sahni, Ashok
Publisher: name: Zenodo
Year: 1972
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Crocodilia

description: SUBORDER? SEBECOSUCHIA
Figure 8Y, Z
AMNH 8549 represents another rare group which is tentatively assigned to the Sebecosuchia (fig. 8Y, Z). Sebecosuchian teeth resemble theropod teeth as pointed out by Simpson (1937a, 1937b) and Colbert (1946), and were consistently confused as such by earlier workers. Such teeth differ from contemporary theropod teeth in that the blade is usually straighter, the serrations on the anterior and the posterior sides are finer, and a more prominent groove is present along the midline of the tooth on the lingual and labial side.
Similar teeth have been reported from the Milk River Formation of Alberta (Russell, 1935, p. 123, fig. 9) and from the Lance Formation of Wyoming (Estes, 1964, p. 143). They have yet to be reported, however, from the Judith River Formation or from its equivalent formation in Alberta.
Russell (1935) suggested that the teeth may have come from the premaxilla of a deinodont. Considering the known skulls of these large carnivores, this seems unlikely. Estes (1964, p. 143), on the other hand, believed it probable that the teeth represent a juvenile theropod. At present, there is no conclusive evidence that the teeth belong to the theropods, or, for that matter, to the Saurischia.
Langston (1956) reviewed criteria useful in distinguishing between sebecid teeth and carnosaur teeth.
description: Published as part of Sahni, Ashok, 1972, The vertebrate Fauna of the Judith River formation, Montana, pp. 319-416 in Bulletin of the American Museum of Natural History 147 (6) on page 351, DOI: 10.5281/zenodo.3382461
Hamiltonian potential functions for differential games
Creators: name: Dragone, Davide
name: Lambertini, Luca
name: Leitmann, George
name: Palestini, Arsen
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-P/01 Economia politica

description: We introduce the concept of Hamiltonian potential function for noncooperative open-loop differential games with n players, n controls and n states, and characterise a sufficient condition for its existence. We also identify a class of games admitting a Hamiltonian potential and provide appropriate examples pertaining to advertising, industrial organization and macroeconomic policy.
FIRST-based survey of Compact Steep Spectrum sources, II. MERLIN and VLA observations of Medium-sized Symmetric Objects
Creators: name: Kunert-Bajraszewska, Magdalena
name: Marecki, Andrzej
name: Thomasson, Peter
name: Spencer, Ralph E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A new sample of candidate Compact Steep Spectrum (CSS) sources that are much weaker than the CSS source prototypes has been selected from the VLA FIRST catalogue. MERLIN `snapshot' observations of the sources at 5 GHz indicate that six of them have an FR II-like morphology, but are not edge-brightened as is normal for Medium-sized Symmetric Objects (MSOs) and FR IIs. Further observations of these six sources with the VLA at 4.9 GHz and MERLIN at 1.7 GHz, as well as subsequent full-track observations with MERLIN at 5 GHz of what appeared to be the two sources of greatest interest are presented. The results are discussed with reference to the established evolutionary model of CSS sources being young but in which not all of them evolve to become old objects with extended radio structures. A lack of stable fuelling in some of them may result in an early transition to a so-called coasting phase so that they fade away instead of growing to become large-scale objects. It is possible that one of the six sources (1542+323) could be labelled as a prematurely `dying' MSO or a `fader'.
description: 13 pages, matches the version printed in Astronomy & Astrophysics
Mixed vs Stable Anti-Yetter-Drinfeld Contramodule
Creators: name: Shapiro, Ilya
Publisher: name: arXiv
Year: 2020
Subjects: subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 16E35, 16T05, 18G90, 19D55

description: We examine the cyclic homology of the monoidal category of modules over a finite dimensional Hopf algebra, motivated by the need to demonstrate that there is a difference between the recently introduced mixed anti-Yetter-Drinfeld contramodules and the usual stable anti-Yetter-Drinfeld contramodules. Namely, we show that Sweedler's Hopf algebra provides an example where mixed complexes in the category of stable anti-Yetter-Drinfeld contramodules (previously studied) are not equivalent, as differential graded categories to the category of mixed anti-Yetter-Drinfeld contramodules (recently introduced).
A fuzzy model for sensitivity analysis in real options
Creators: name: Agliardi, Elettra
name: Guerra, Maria Letizia
name: Stefanini, Luciano
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-P/01 Economia politica

description: This paper adopts a promising concept of uncertainty, incorporating both stochastic processes and fuzzy theory to capture the somewhat vague and imprecise ideas the manager has about the future expected cash flows, the profitability of the project, the costs of the project and many other variables involved in an investment decision.
Thus, uncertainty in real option valuation can be faced introducing fuzziness in the fundamental items of the classical approach. In particular, three examples of real options are examined and the computational experiments are performed. It is shown that fuzziness can play the role of a sensitivity analysis of the real option value with respect to the key decisional variables.
Foreign Aid and Policies under Asymmetric Information
Creators: name: Montanari, Lisa
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-P/01 Economia politica

description: It is often difficult for external agents understanding to what extent the preferences of a government are directed towards welfare enhancing policies and reforms. I develop a principal-agent model in which a domestic lobby attempts to in.uence the government.s policy choices by means of monetary transfers while the weight the government attaches to public welfare is private information. I observe that asymmetric information generally leads to a larger policy distortion in equilibrium. This simple setting serves as a benchmark for the comparison with a commom agency framework. An International Financial Institution giving policy conditional aid to the government is included as an additional principle in the analysis. Its policy objective is in conflict with the lobby's one. Whether the equilibrium distortion results lower or higher depends on the range of uncertainty over the government's preferences and on the degree of benevolence of the
government.
Non Abelian gauge symmetries induced by the unobservability of extra-dimensions in a Kaluza-Klein approach
Creators: name: Cianfrani, F.
name: Montani, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we deal with the extension of the Kaluza-Klein approach to a non-Abelian gauge theory; we show how we need to consider the link between the n-dimensional model and a four-dimensional observer physics, in order to reproduce fields equations and gauge transformations in the four-dimensional picture. More precisely, in fields equations any dependence on extra-coordinates is canceled out by an integration, as consequence of the unobservability of extra-dimensions. Thus, by virtue of this extra-dimensions unobservability, we are able to recast the multidimensional Einstein equations into the four-dimensional Einstein-Yang-Mills ones, as well as all the right gauge transformations of fields are induced. The same analysis is performed for the Dirac equation describing the dynamics of the matter fields and, again, the gauge coupling with Yang-Mills fields are inferred from the multidimensional free fields theory, together with the proper spinors transformations.
description: 5 pages, no figures, to appear in Mod. Phys. Lett. A
Relating dust reference models to conventional systems in manifestly gauge invariant perturbation theory
Creators: name: Giesel, Kristina
name: Li, Bao-Fei
name: Singh, Parampreet
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Models with dust reference fields in relational formalism have proved useful in understanding the construction of gauge-invariant perturbation theory to arbitrary orders in the canonical framework. These reference fields modify the dynamical equations for perturbation equations. However, important questions remain open on the relation with conventional perturbation theories of inflaton coupled to gravity and of multi-fluid systems, and on understanding modifications in terms of physical degrees of freedom. These gaps are filled in this manuscript for Brown-Kuchař and Gaussian dust models, both of which involve three scalar physical degrees of freedom. We establish a relationship of these models with conventional inflationary and multi-fluid system of inflation and ordinary dust by introducing a set of gauge invariant variables on the reduced phase space of the dust reference models. We find the modifications due to dust clocks to Bardeen equation in the longitudinal gauge and Mukhanov-Sasaki equation in the spatially-flat gauge, in terms of physical degrees of freedom. This results in a closed system of equations for all the degrees of freedom needed to explore the evolution of the scalar perturbations. Our analysis shows for the first time that even for two-fluid systems, there is a natural choice of the set of gauge invariant variables for each chosen gauge which not only offers a direct physical interpretation but also results in simplifications to the dynamical equations.
description: Revised version with expanded discussion, new appendix and title change. To appear in PRD