cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Electrical conductivity in granular media and Branly's coherer: A simple experiment
Creators: name: Falcon, Eric
name: Castaing, Bernard
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show how a simple laboratory experiment can illustrate certain electrical transport properties of metallic granular media. At a low critical imposed voltage, a transition from an insulating to a conductive state is observed. This transition comes from an electro-thermal coupling in the vicinity of the microcontacts between grains where microwelding occurs. Our apparatus allows us to obtain an implicit determination of the microcontact temperature, which is analogous to the use of a resistive thermometer. The experiment also illustrates an old problem, the explanation of Branly's coherer effect - a radio wave detector used for the first wireless radio transmission, and based on the sensitivity of the metal fillings conductivity to an electromagnetic wave.
description: accepted for publication in American Journal of Physics (to be published between February 2005 and June 2005)
Outflanking and securely using the PIN/TAN-System
Creators: name: Wiesmaier, A.
name: Fischer, M.
name: Lippert, M.
name: Buchmann, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The PIN/TAN-system is an authentication and authorization scheme used in e-business. Like other similar schemes it is successfully attacked by criminals. After shortly classifying the various kinds of attacks we accomplish malicious code attacks on real World Wide Web transaction systems. In doing so we find that it is really easy to outflank these systems. This is even supported by the users' behavior. We give a few simple behavior rules to improve this situation. But their impact is limited. Also the providers support the attacks by having implementation flaws in their installations. Finally we show that the PIN/TAN-system is not suitable for usage in highly secure applications.
description: 7 pages; 2 figures; IEEE style; final version
Charge and Spin Thermoelectric Transport in Benzene-Based Molecular Nano-Junctions: A Quantum Many-Body Study
Creators: name: Senapati, Parbati
name: Parida, Prakash
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Within the Coulomb blockade regime, our study delves into the charge, spin, and thermoelectric transport characteristics in a benzene-based molecular nano-junction using the Pauli master equation and linear response theory. The charge- and spin-transport studies show strong negative differential conductance features in the current-voltage ($I-V$) characteristics for the ortho and meta connections of electrodes on either side. Contrarily, the para-connection displays Coulomb staircase behavior. Exploring spin current behavior in the presence of spin-polarized electrodes or external Zeeman field, we establish a methodology that facilitates precise control over the specific spin flow. Various charge and spin thermoelectric transport coefficients have been studied with varying chemical potentials. We focus on spin-polarized-conductance, the Seebeck coefficient, and the figure of merit. By adjusting electrode polarization or employing an external magnetic field, we achieve an impressive peak value for the spin thermoelectric figure of merit, approximately 4.10. This outcome underscores the strategic value of harnessing both spin-polarized electrodes and external magnetic fields within the domain of spin caloritronics.
description: 40 pages, 10 figures
Additional file 3 of Self-harm with suicidal and non-suicidal intent in young people in sub-Saharan Africa: a systematic review
Creators: name: Quarshie, Emmanuel N-B
name: Waterman, Mitch G.
name: House, Allan O.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 3. Search strategies.
Efeitos do Pronaf Sobre a Pobreza Rural no Brasil (2001-2009)
Creators: name: Batista, Henrique Rogê
name: Neder, Henrique Dantas
name: Batista, Henrique Rogê
name: Neder, Henrique Dantas
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Per capita income
subject: income distribution
subject: Pronaf
subject: rural poverty.

description: The objective of this work is to analyze the effects of National Program for Strengthening of Family Agriculture (Pronaf) in rural economic growth and income inequality in Brazil in the 2001-2009 period. For this, it is estimated (through dynamic panel model: GMM-System) income-Pronaf and inequality- Pronaf elasticities. The work assumes that the variable Pronaf does not directly affect poverty and it does so from the variation of income and/or changes in income distribution. The literature review indicated that an increase in per capita income and a decrease in the Gini coefficient lead to a reduction of rural poverty, and a positive change in Pronaf credits leads to an increase in per capita household income and a decrease in the income concentration. The estimates for rural Brazilian indicate that: i) the increase in per capita income or decrease in income inequality tend to reduce poverty; ii) the effect of Pronaf on the average per capita income and income inequality is conditioned by the socioeconomic specifics of observation units, and iii) the expenses of Pronaf tend to indirectly reduce poverty by increasing the average income of farmers and reducing the income concentration.
Development and application of a $^3$He Neutron Spin Filter at J-PARC
Creators: name: Okudaira, T.
name: Oku, T.
name: Ino, T.
name: Hayashida, H.
name: Kira, H.
name: Sakai, K.
name: Hiroi, K.
name: Takahashi, S.
name: Aizawa, K.
name: Endo, H.
name: Endo, S.
name: Hino, M.
name: Hirota, K.
name: Honda, T.
name: Ikeda, K.
name: Kakurai, K.
name: Kambara, W.
name: Kitaguchi, M.
name: Oda, T.
name: Ohshita, H.
name: Otomo, T.
name: Shimizu, H. M.
name: Shinohara, T.
name: Suzuki, J.
name: Yamamoto, T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We are developing a neutron polarizer with polarized $^3$He gas, referred to as a $^3$He spin filter, based on the Spin Exchange Optical Pumping (SEOP) for polarized neutron scattering experiments at Materials and Life Science Experimental Facility (MLF) of Japan Proton Accelerator Research Complex (J-PARC). A $^3$He gas-filling station was constructed at J-PARC, and several $^3$He cells with long spin relaxation times have been fabricated using the gas-filling station. A laboratory has been prepared in the MLF beam hall for polarizing $^3$He cells, and compact pumping systems with laser powers of 30~W and 110~W, which can be installed onto a neutron beamline, have been developed. A $^3$He polarization of 85% was achieved at a neutron beamline by using the pumping system with the 110~W laser. Recently, the first user experiment utilizing the $^3$He spin filter was conducted, and there have been several more since then. The development and utilization of $^3$He spin filters at MLF of J-PARC are reported.
description: 9 pages, 15 figures
Magnitude e Condições de Reprodução Econômica dos Agricultores Familiares Pobres no Semiárido Brasileiro: evidências a partir do Rio Grande do Norte
Creators: name: Aquino, Joacir Rufino De
name: Lacerda, Marta Aurélia Dantas De
name: Aquino, Joacir Rufino De
name: Lacerda, Marta Aurélia Dantas De
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Poor family farmers
subject: Pronaf
subject: rural development.

description: The purpose of this paper is to analyze the dimension and the conditions of economic reproduction of the poor farmers potentially classifiable in Group B of the National Program for Strengthening Family Farm (Pronaf), in Rio Grande do Norte State. To this end, was used information obtained through processing “special tabulation” of the second count of the Agricultural Census in 2006, conducted by IBGE. In general, the work shows that the family farmers in Group B - those with annual incomes until $3000 - totaled 42,234 establishments, representing roughly 60% of the 71,210 farmers in Rio Grande do Norte census in 2006. The low value of agricultural production generated annually by this number of producers is determined by “multiple productive deficiencies” (scarcity of land, water, education, technology, credit and technical assistance), which makes its economic reproduction dependent on other sources of revenue from outside the property, with particular emphasis on incomes of rural pensions and other government social programs. These and other evidences allow advanced understanding of poverty and social heterogeneity that characterizes agriculture in the Brazilian semiarid region by providing relevant information for further research in the area and to (re) orient the focus of the public policies for rural development.
O Trabalho Familiar Extrativista Sob a Influência de Políticas Públicas
Creators: name: Mota, Dalva Maria Da
name: Schmitz, Heribert
name: Silva Júnior, Josué Francisco Da
name: Rodrigues, Raquel Fernandes De Araújo
name: Mota, Dalva Maria Da
name: Schmitz, Heribert
name: Silva Júnior, Josué Francisco Da
name: Rodrigues, Raquel Fernandes De Araújo
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Closed Season Insurance of Artisanal Fishermen
subject: Food Acquisition Program
subject: Family Grant Program
subject: mangaba gatherer women.

description: This paper assesses the relationship between the family labor organization in the extractive activity and the involvement in public policy programs in Sergipe State. The research was predominantly carried out through a qualitative approach with women self-appointed as mangaba gatherers and “marisqueiras”. This is a relevant segment to the “traditional people and communities” affiliated to the closed season insurance of artisanal fishermen (SDPA), the family grant program (PBF), and the Brazilian food acquisition program (PAA). The research approach included observations and interviews with different social actors involved in the extractive activity and public policy programs. The main findings show that public policies programs: i) influence the reorganization of everyday work in the extractive activity, especially concerning the reduction of the participation of young people and children in the activity and the intensity of working hours; ii) strengthen the traditional roles of men and women in the PBF and dilute the frontiers between these roles through the PAA program; iii) decreases the workload through the SDPA program and increases it in the PAA; and iv) affect the different significances attributed to labor.
Temperature dependent magnetic anisotropy in metallic magnets from an ab-initio electronic structure theory: L1_0-ordered FePt
Creators: name: Staunton, J. B.
name: Ostanin, S.
name: Razee, S. S. A.
name: Gyorffy, B. L.
name: Szunyogh, L.
name: Ginatempo, B.
name: Bruno, Ezio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: On the basis of a first-principles, relativistic electronic structure theory of finite temperature metallic magnetism, we investigate the variation of magnetic anisotropy, K, with magnetisation, M, in metallic ferromagnets. We apply the theory to the high magnetic anisotropy material, L1_0-ordered FePt, and find its uniaxial K consistent with a magnetic easy axis perpendicular to the Fe/Pt layering for all M and to be proportional to M^2 for a broad range of values of M. For small M, near the Curie temperature, the calculations pick out the easy axis for the onset of magnetic order. Our results are in good agreement with recent experimental measurements on this important magnetic material.
description: 4 pages, 2 figures
Additional file 4 of Overexpression of an endogenous type 2 diacylglycerol acyltransferase in the marine diatom Phaeodactylum tricornutum enhances lipid production and omega-3 long-chain polyunsaturated fatty acid content
Creators: name: Haslam, Richard P.
name: Hamilton, Mary L.
name: Economou, Chloe K.
name: Smith, Richard
name: Hassall, Kirsty L.
name: Napier, Johnathan A.
name: Sayanova, Olga
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 4: Figure S1. Fatty acid content (µmol/g) of WT and transgenic P. tricornutum. Cells were cultivated in N-replete (N+, darker fill bars) and N-deplete (N-, lighter fill bars) medium at a 24, b 48 and c 72 hours. Each measurement is the average of minimum four technical replicas. Error bars indicate standard deviation.
Cooperative effect of phonons and electronic correlations for superconductivity in cobaltates
Creators: name: Foussats, A.
name: Greco, A.
name: Bejas, M.
name: Muramatsu, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose that unconventional superconductivity in hydrated sodium cobaltate $Na_xCoO_2$ results from an interplay of electronic correlations and electron-phonon interactions. On the basis of the $t-V$ model plus phonons we found evidences for a) unconventional superconductivity, b) realistic values of $T_c$ and c) the dome shape existing near $x \sim 0.35$. This picture is obtained for $V$ close to the critical Coulomb repulsion $V_c$ which separates the uniform Fermi liquid from $\sqrt{3} \times \sqrt{3}$ CDW ordered phase.
description: 4 pages, 3 figures
High Pressure X-Ray Diffraction Study of UMn2Ge2
Creators: name: Siruguri, Vasudeva
name: Paranjpe, S. K.
name: Raj, P.
name: Sathyamoorthy, A.
name: Itie, Jean Paul
name: Polian, Alain
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Uranium manganese germanide, UMn2Ge2, crystallizes in body-centered tetragonal ThCr2Si2 structure with space group I4/mmm, a = 3.993A and c = 10.809A under ambient conditions. Energy dispersive X-ray diffraction was used to study the compression behaviour of UMn2Ge2 in a diamond anvil cell. The sample was studied up to static pressure of 26 GPa and a reversible structural phase transition was observed at a pressure of ~ 16.1 GPa. Unit cell parameters were determined up to 12.4 GPa and the calculated cell volumes were found to be well reproduced by a Murnaghan equation of state with K0 = 73.5 GPa and K' = 11.4. The structure of the high pressure phase above 16.0 GPa is quite complicated with very broad lines and could not be unambiguously determined with the available instrument resolution.
François Honnorat, avocat
Creators: name: Leibowitch, Jacques (1942-2020)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021

description: 3 fichiers
description: date: start=1998-08-13;end=2000-05-22
Unified perspective on proteins: A physics approach
Creators: name: Banavar, Jayanth R.
name: Hoang, Trinh Xuan
name: Maritan, Amos
name: Seno, Flavio
name: Trovato, Antonio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We study a physical system which, while devoid of the complexity one usually associates with proteins, nevertheless displays a remarkable array of protein-like properties. The constructive hypothesis that this striking resemblance is not accidental leads not only to a unified framework for understanding protein folding, amyloid formation and protein interactions but also has implications for natural selection.
description: 26 pages, 15 figures, to appear on Phys. Rev. E
Análise Sobre o Acesso aos Programas de Políticas Públicas da Agricultura Familiar nos Municípios do Circuito das Frutas (SP)
Creators: name: Souza-Esquerdo, Vanilde Ferreira De
name: Bergamasco, Sonia Maria Pessoa Pereira
name: Souza-Esquerdo, Vanilde Ferreira De
name: Bergamasco, Sonia Maria Pessoa Pereira
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: family farming
subject: public polices
subject: Pronaf
subject: Food Aquisition Program
subject: National School Feeding Program.

description: With the understating of the Brazilian family farming as a social and productive category from the 90s, many public policy programs have been formulated to ensure its propagation as a basic food producer, and to keep the man on the field. In this context, this paper intends to analyze the family farming in the municipalities of the “Fruit Circuit” in São Paulo State, Brazil, taking into account the importance of the access to the main public policy programs, which aim at strengthening this agriculture. Since this region is characterized by the strong presence of family farmers, we analyzed the following programs: Pronaf (National Program for Strengthening of Family Farming), PAA (Food Acquisition Program), and PNAE (National School Feeding Program), which have been the major initiatives of valuing this agriculture’s sector in São Paulo. It was noticed that, considering the universe of the family farming in the studied municipalities, their participation in these public programs is still small. Among the factors that may explain this situation, we highlight the lack of information to farmers about the programs, but especially the low value paid to them.
Produzione del colza per fini energetici: impatto ambientale e metodo di coltivazione
Creators: name: Palmieri, Nadia
name: Forleo, Maria Bonaventura
name: Suardi, Alessandro
name: Coaloa, Domenico
name: Pari, Luigi
name: Palmieri, Nadia
name: Forleo, Maria Bonaventura
name: Suardi, Alessandro
name: Coaloa, Domenico
name: Pari, Luigi
Publisher: name: Unknown
Year: 2012
Subjects: subject: Resource /Energy Economics and Policy
subject: Bioeconomy
subject: Life Cycle Assessment
subject: Brassica napus
subject: L

description: A seguito dell’applicazione della riforma OCM zucchero, si sono avviati piani di riconversione della filiera bieticolo-saccarifera verso diverse filiere agroenergetiche. La colza è considerata tra le colture strategiche da utilizzare per la produzione di biodiesel. Tra gli studi di riconversione sta acquistando sempre maggiore importanza l’analisi della sostenibilità ambientale ed economica del processo di cambio d’uso del suolo. Obiettivo dello studio è condurre un’analisi dell’impatto ambientale della coltivazione di colza al fine di individuare il modello colturale meno impattante. L’analisi ambientale è condotta su cinque realtà rappresentative individuate mediante l’impiego della cluster analysis a partire da un campione di 251 appezzamenti coltivati a colza (2751 ettari totali) nel biennio 2009-2010 in diverse regioni italiane. Per valutare le performance ambientali delle cinque realtà indagate si è applicata la metodologia del Life Cycle Assessment che ha consentito di porre a confronto le unità al fine di individuare quella che, per metodo di coltivazione, tipologia e quantità di fattori produttivi, causa un minore impatto ambientale relativo.
Additional file 2 of Self-harm with suicidal and non-suicidal intent in young people in sub-Saharan Africa: a systematic review
Creators: name: Quarshie, Emmanuel N-B
name: Waterman, Mitch G.
name: House, Allan O.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Additional file 2. PRISMA checklist.
Politiche agricole europee post 2013: modelli predittivi dei cambiamenti di uso del suolo
Creators: name: Cozzi, Mario
name: Romano, Severino
name: Giglio, P.
name: Catullo, Giovanna
name: Cozzi, Mario
name: Romano, Severino
name: Giglio, P.
name: Catullo, Giovanna
Publisher: name: Unknown
Year: 2012
Subjects: subject: Land Economics/Use
subject: reti neuurali
subject: multi-layyer perceptronn (MLP)
subject: polittica agricola comunitaria
subject: svviluppo ruralee

description: Il settore primario svolge un ruolo fondamenntale per il mantenimento ddell’equilibrioo climatico ambientale e laa sua funzionee di produzionne di beni di pubblica utilità trova oggi notevole riconoscimento all’interno dei programmi dii politica agricola comunitaria. Programmi che, a seguito dei cambiamenti climatici e del mutamento delle condizioni del mercato, sono sensibilmente mutati. Ciò ha avuto delle notevoli influenze sul settore agriricolo, ed in particolare ha condizionatoo le scelte colturali degli agricoltori e, di conseguenza, la destinazionne d’uso dei suoli agricoli. Le variabili coinvolte in questo processo sono molteplici:morfologiche, climatiche, economiche e sociali, ecc.;; da ciò comprendere le dinamiche che guidano il cambiamento e prevedere la sua direzione comporta di certo un valore aggiunto per i decisori. Nel caso in esame è stato utiilizzato un particolare modello di ANN basato sulll’utilizzo dell Multi-Layerr Perceptron ((MLP). Questto modello, aa partire dallee transizioni già avvenute in passato, consente di realizzare dellee mappe di idooneità al cambiamento futuro. Partenndo dalle mappe di idoneità al cambiamento, seconndo il principio delle catene di Markoov, sono stati realizzati due scenari di possibile cambiamento di destinazione d’uso dei suoli, proiettati nel 2050, al fine di amplificare gli effetti delle driving forces agenti sul territorio. Il primo, lo scenario “A”, è stato realizzato seguendo gli attuali indirizzi politico-economici, senza l’ipotesi di interventi comunitari differenti da quelli attualmente in vigore. Il secondo, lo scenario “B”, è stato realizzato partendo dall’ipotesi di intervento di alcune significative misure comunitarie post 22013, relative sia al nuovvo sistema dii pagamenti diiretti sia alle nuove priorità di sviluppo rurale. Il confronto tra idue scenari ha messo in luce come politiche di settore mirate ed incisive, possano concretamente influenzare il mosaico territoriale, quindi il paesaggio e di conseguenzaa le condiziooni climatico--ambientali.
Chinese and U.S. Apple Trade in ASEAN
Creators: name: Luckstead, Jeff
name: Devadoss, Stephen
name: Mittelhammer, Ronald C.
name: Luckstead, Jeff
name: Devadoss, Stephen
name: Mittelhammer, Ronald C.
Publisher: name: Unknown
Year: 2012
Subjects: subject: Industrial Organization
subject: International Relations/Trade
subject: Apple Trade
subject: Market Power
subject: ASEAN
subject: Conjectural Elasticity

description: We investigate oligopolistic competition between U.S. and Chinese apple exporters in the ASEAN market using strategic trade theory and the NEIO literature. We also analyze competition in the U.S. and Chinese domestic markets. U.S. supplies higher quality apples to ASEAN than China, resulting in product differentiation. The results show that U.S. exporters had a higher markup than Chinese exporters through the 1990s; however, as the share of Chinese apples expanded, the U.S. markup declined and the Chinese markup increased dramatically. Competitive pricing prevails both in the U.S. and Chinese domestic markets.
Additional file 3 of Overexpression of an endogenous type 2 diacylglycerol acyltransferase in the marine diatom Phaeodactylum tricornutum enhances lipid production and omega-3 long-chain polyunsaturated fatty acid content
Creators: name: Haslam, Richard P.
name: Hamilton, Mary L.
name: Economou, Chloe K.
name: Smith, Richard
name: Hassall, Kirsty L.
name: Napier, Johnathan A.
name: Sayanova, Olga
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 3: Table S3. A comparison of promotor efficacy in response to nitrogen treatment. Fatty acid composition (Mol%) of EPA and DHA in WT and transgenic lines expressing an O. tauri Δ5-elongase with either fcpA or EF2 promoter in the E phase of growth.
Proton-Neutron Coupling in the Gamow Shell Model: the Lithium Chain
Creators: name: Michel, N.
name: Nazarewicz, W.
name: Ploszajczak, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The shell model in the complex k-plane (the so-called Gamow Shell Model) has recently been formulated and applied to structure of weakly bound, neutron-rich nuclei. The completeness relations of Newton and Berggren, which apply to the neutron case, are strictly valid for finite-range potentials. However, for long-range potentials, such as the Coulomb potential for protons, for which the arguments based on the Mittag-Leffler theory do not hold, the completeness still needs to be demonstrated. This has been done in this paper, both analytically and numerically. The generalized Berggren relations are then used in the first Gamow Shell Model study of nuclei having both valence neutrons and protons, namely the lithium chain. The single-particle basis used is that of the Hartree-Fock-inspired potential generated by a finite-range residual interaction. The effect of isospin mixing in excited unbound states is discussed.
description: Accepted in Phys. Rev. C
Criação de indicadores cientométricos: Estudo de caso da integração do Observatório CT&I em Saúde da Fiocruz ao Sistema BrCris/IBICT
Creators: name: Mendes, Waldeyr
name: Grando, Rafaela Lora
name: Dias, Thiago Magela
name: Jorge, Vanessa de Arruda
name: Segundo, Washington
Publisher: name: Zenodo
Year: 2022

description: Apresentação realizada na sessão Comunicação I da 13ª Conferência Lusófona de Ciência Aberta, formato híbrido, de 10 a 12 de outubro de 2022.
Some Analytical Aspects in Field Theories with Dynamical Mass Generation
Creators: name: Sauli, Vladimir
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The consequence of dynamical mass generation on the singularity structure of propagators is discussed. First the phenomena of dynamical mass generation is discussed in the framework of Euclidean gap equations, then a possible Minkowski solution is looking for. The examples are reviewed and studied for several models: Yukawa, QED, QCD and Wess-Zumino. It is argued that the absence of propagator pole goes hand by hand with the nontrivial solution for mass function. The consequences are discussed.
description: published in Czech. J. Phys
The stability and Hopf bifurcation of the diffusive Nicholson's blowflies model in spatially heterogeneous environment
Creators: name: Huang, Dan
name: Chen, Shanshan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this paper, we consider the diffusive Nicholson's blowflies model in spatially heterogeneous environment when the diffusion rate is large. We show that the ratio of the average of the maximum per capita egg production rate to that of the death rate affects the dynamics of the model. The unique positive steady state is locally asymptotically stable if the ratio is less than a critical value. However, when the ratio is greater than the critical value, large time delay can make the unique positive steady state unstable through Hopf bifurcation. Especially, the first Hopf bifurcation value tends to that of the ''average'' DDE model when the diffusion rate tends to infinity. Moreover, we show that the direction of the Hopf bifurcation is forward, and the bifurcating periodic solution from the first Hopf bifurcation value is orbitally asymptotically stable, which improves the earlier result by Wei and Li (Nonlinear. Anal., 60: 1351-1367, 2005).
Faciliter l’adoption d’interventions de securite alimentaire dans le secteur des aliments de rue et dans les champs
Creators: name: Karg, Hanna
name: Drechsel, Pay
name: Amoah, Philip
name: Jeitler, Regina
name: Karg, Hanna
name: Drechsel, Pay
name: Amoah, Philip
name: Jeitler, Regina
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Health Economics and Policy
subject: Food safety
subject: Restaurants
subject: Public health
subject: Social behaviour
subject: Wastewater irrigation
subject: Vegetables
subject: Guidelines
subject: West Africa
subject: Ghana

description: This chapter discusses the implementation challenges of the WHO Guidelines on safe wastewater use pertaining to the adoption of the so-called ‘post-treatment’ or ‘non-treatment’ options, like safer irrigation practices or appropriate vegetablewashing in kitchens. Due to limited risk awareness and immediate benefits of wastewater irrigation, it is unlikely that a broad adoption of recommended practices will automatically follow revised policies or any educational campaign and training. Most of the recommended practices do not only require behaviourchange but might also increase operational costs. In such a situation, significant efforts are required to explore how conventional and/or social marketing can support the desired behaviour-change towards the adoption of safety practices. This will require new strategic partnerships and a new section in the WHO Guidelines. This chapter outlines the necessary steps and considerations for increasing the adoption probability, and suggests a framework which is based on a combination of social marketing, incentive systems, awareness creation/education and application of regulations. An important conclusion is that these steps require serious accompanying research of the target group, strongly involving social sciences, which should not be underestimated in related projects.
Maunakea Spectroscopic Explorer exposure time calculator for end-to-end simulator: to optimizing spectrograph design and observing simulation
Creators: name: Ji, Tae-Geun
name: Sobeck, Jennifer
name: Kim, Changgon
name: Ahn, Hojae
name: Yang, Mingyeong
name: Kim, Taeeun
name: Hong, Sungwook E.
name: Szeto, Kei
name: Marshall, Jennifer L.
name: Surace, Christian
name: Pak, Soojong
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Maunakea Spectroscopic Explorer (MSE) project will provide multi-object spectroscopy in the optical and near-infrared bands using an 11.25-m aperture telescope, repurposing the original Canada-France-Hawaii Telescope (CFHT) site. MSE will observe 4,332 objects per single exposure with a field of view of 1.5 square degrees, utilizing two spectrographs with low-moderate (R$\sim$3,000, 6,000) and high (R$\approx$30,000) spectral resolution. In general, an exposure time calculator (ETC) is used to estimate the performance of an observing system by calculating a signal-to-noise ratio (S/N) and exposure time. We present the design of the MSE exposure time calculator (ETC), which has four calculation modes (S/N, exposure time, S/N trend with wavelength, and S/N trend with magnitude) and incorporates the MSE system requirements as specified in the Conceptual Design. The MSE ETC currently allows for user-defined inputs of target AB magnitude, water vapor, airmass, and sky brightness AB magnitude (additional user inputs can be provided depending on computational mode). The ETC is built using Python 3.7 and features a graphical user interface that allows for cross-platform use. The development process of the ETC software follows an Agile methodology and utilizes the Unified Modeling Language (UML) diagrams to visualize the software architecture. We also describe the testing and verification of the MSE ETC.
description: 30 pages, 13 figures
Un modello per la valutazione della sostenibilità territoriale delle filiere agroalimentari: struttura e applicazione alla sfera ambientale
Creators: name: Cicatiello, Clara
name: Pancino, Barbara
name: Franco, Silvio
name: Cicatiello, Clara
name: Pancino, Barbara
name: Franco, Silvio
Publisher: name: Unknown
Year: 2012
Subjects: Agribusiness

description: Questo lavoro si pone l’obiettivo di proporre un approccio interpretativo che sia in grado di guidare la valutazione della sostenibilità delle diverse forme organizzative delle filiere agroalimentari, offrendone una prima applicazione alla misura della sostenibilità ambientale di diversi modelli di filiera. Il modello proposto nel lavoro adotta un approccio a tre sfere – ambiente, società, economia – per definire la sostenibilità della filiera agroalimentare, articolandosi secondo una struttura gerarchica in cui a ognuna delle tre dimensioni corrispondono alcune variabili di misura. La valutazione quantitativa di tali variabili è legata a un set di indicatori, la cui integrazione fornisce una espressione sintetica della sostenibilità di una filiera. Per la sfera ambientale, in particolare, si individuano due variabili – l’impatto delle attività della filiera sulla source function e sulla sink function dell’ecosistema – espresse da un set di cinque indicatori. Nel paper, dopo aver argomentato la scelta di valutare l’impatto ambientale delle diverse filiere agroalimentari all’interno di un riferimento territoriale comune, viene proposta una prima applicazione del modello riferita al confronto fra tre diverse tipologie di filiera della mela da tavola - grande distribuzione, commercio al dettaglio e filiera corta - nella provincia di Viterbo. Di queste filiere si valuta il livello di sostenibilità ambientale attraverso la misura dei relativi indicatori. I risultati mostrano il diverso impatto delle tre filiere sulla source function e la sink function, evidenziando che, se si adotta una prospettiva territoriale, non è possibile affermare che le filiere corte siano in termini assoluti ecologicamente più sostenibili di altri modelli di filiera, come invece sostenuto da molta letteratura sul tema. Il paper si conclude con una discussione sull’opportunità che i decision-maker, nell’ottica di perseguire un obiettivo di maggiore sostenibilità del sistema locale, basino le loro politiche di promozione e di sostegno alle diverse tipologie di filiera considerando con attenzione il loro effettivo impatto ambientale all’interno del territorio.
El valor del uso del agua en el regadío de la cuenca del Segura y en las zonas regables del trasvase Tajo-Segura
Creators: name: Calatrava-Leyva, Javier
name: Martinez-Granados, David
name: Calatrava-Leyva, Javier
name: Martinez-Granados, David
Publisher: name: Unknown
Year: 2012
Subjects: subject: Environmental Economics and Policy
subject: Water economics
subject: economic valuation of water
subject: agricultural water use
subject: positive mathematical programming.

description: Este trabajo analiza el valor económico de uso del agua en la agricultura de regadío de la Cuenca del Segura y en las zonas regables que utilizan recursos procedentes del trasvase Tajo-Segura,para lo que se emplea un modelo de programación matemática no lineal que asigna los recursos hídricos y la superficie regable entre los cultivos de cada una de las 64 Unidades de Demanda Agraria de la cuenca.Los valores marginal y medio del agua obtenidos para el conjunto de la cuenca son 0,52 €/m3 y 0,81 €/m3 respectivamente, si bien existen notables diferencias entre zonas. El regadío de la cuenca genera una rentabilidad media privada, medida en términos de margen neto de las explotaciones, de 879 millones de €/año, mientras que el valor de la aportación media anual de los recursos trasvasados desde la cabecera del Tajo se ha estimado en 169 millones de euros.
Evolución de la productividad agraria en las regiones europeas: un análisis de convergencia con métodos de panel dinámicos
Creators: name: Cuerva, Maria C.
name: Cuerva, Maria C.
Publisher: name: Unknown
Year: 2012
Subjects: subject: Productivity Analysis
subject: Convergence
subject: dynamic data panel
subject: distribution dynamics
subject: labour productivity
subject: European regions

description: Este trabajo analiza si ha habido un proceso convergente en la productividad del trabajo en el sector agrario de la Unión Europea (UE), para un conjunto de 125 regiones en el periodo 1986-2004. Para su estudio se propone un modelo dinámico de datos de panel. Los resultados confirman que las agriculturas se mueven muy cerca de sus estados estacionarios que difieren entre sí, de modo que en el largo plazo es de esperar que las diferencias en productividad persistan. El uso adicional de técnicas relacionadas con la dinámica de la distribución permite corroborar que las disparidades regionales en productividad son amplias y persistentes.
title: Barcelona - La Sagrera
Creators: name: Kasmanhuber, Stefan
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Architektonischer Entwurf
subject: architectural design

description: Die Motivation zum Verfassen dieser Arbeit kam nach meinem Auslandsjahr an der ETSAB Barcelona. Als pulsierende Metropole am Mittelmeer, faszinierte mich diese Stadt bereits, seit ich sie vor 7 Jahren das erste Mal erlebte. Die Nähe zum Strand, das Mittelmeerklima, gepaart mit einer extremen Dichte im Zentrum und deren Bewohner geben der Stadt eine große Vielfältigkeit mit sich ständig wechselnden Szenarios. Der sich rasant wachsenden Stadt steht jedoch auf Grund der hohen Dichte wenig Anteil an Grünflächen zur Verfügung. Straßen werden zwar häufig von Baumreihen begleitet, der Anteil an Parks und Rasenflächen ist jedoch gering. Ziel dieser Arbeit war es, den Stadtteil La Sagrera zu rehabilitieren und eine grüne Erholungszone mit angrenzenden Wohn-, Schul-, und Kulturbauten, zu schaffen. Momentan passieren an dieser Stelle zwischen den Bezirken Sant Andreu und Sant Martí Bahngleise und spalten die zwei Stadteile. Die Überplattung und Konzipierung eines Parks über Ebendiesen stellt das Grundkonzept dieser Arbeit dar. An den angrenzenden Restflächen des Grundstückes wird städtebaulich erweitert und verdichtet und eine Gebäudefamilie geschaffen die dem ganzen Gebiet einen Mehrwert verleihen soll.
description: The idea of developing this project came after my 1 year exchange studies abroad at the ETSAB. Barcelona, one of the most fascinating metropolis in Europe has been one of my favourite cities since i first visited it 7 years ago. The proximaty to the beach, the mediterranean climate, combined with an extremely high urban density and its amazing inhabitants, make it truly versatile in many ways, offering different settings everyway you go. Due to its constant growth and high density, the percentage of green area is pretty low compared to other european cities. Streets are often accompanied by rows of treets, the actual amout of parks and green spaces is low nonetheless. The goal of my project was to rehabilitate the area called La Sagrera, between the districts Sant Andreu and Sant Martí, by creating a green area of regeneration, both by offering a park whilst connecting the two districts. At the moment traintracks cross this area, creating a border for its inhabitants. Closing this border with the park, while constructing residential housing, schools and cultural offers at the borders of the site, would reveal huge benefits for its future residents and neighbours.
NIHAO XXVI: Nature versus nurture, the Star Formation Main Sequence and the origin of its scatter
Creators: name: Blank, Marvin
name: Meier, Liam E.
name: Macciò, Andrea V.
name: Dutton, Aaron A.
name: Dixon, Keri L.
name: Soliman, Nadine H.
name: Kang, Xi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate how the NIHAO galaxies match the observed star formation main sequence (SFMS) and what the origin of its scatter is. The NIHAO galaxies reproduce the SFMS and generally agree with observations, but the slope is about unity and thus significantly larger than observed values. This is because observed galaxies at large stellar masses, although still being part of the SFMS, are already influenced by quenching. This partial suppression of star formation by AGN feedback leads to lower star formation rates and therefore to lower observed slopes. We confirm that including the effects of AGN in our galaxies leads to slopes in agreement with observations. We find the deviation of a galaxy from the SFMS is correlated with its $z=0$ dark matter halo concentration and thus with its halo formation time. This means galaxies with a higher-than-average star formation rate (SFR) form later and vice versa. We explain this apparent correlation with the SFR by re-interpreting galaxies that lie above the SFMS (higher-than-average SFR) as lying to the left of the SFMS (lower-than-average stellar mass) and vice versa. Thus later forming haloes have a lower-than-average stellar mass, this is simply because they have had less-than-average time to form stars, and vice versa. It is thus the nature, i.e. how and when these galaxies form, that sets the path of a galaxy in the SFR versus stellar mass plane.
description: 8 pages, 11 figures, accepted by MNRAS
Deterministic Plug-and-Play for Quantum Communication
Creators: name: Lucamarini, M.
name: Di Giuseppe, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a scheme for secure deterministic quantum communication without using entanglement, in a Plug-and-Play fashion. The protocol is completely deterministic, both in the encoding procedure and in the control one, thus doubling the communication rate with respect to other setups; moreover, deterministic nature of transmission, apart from rendering unnecessary bases revelation on the public channel, allows the realization of protocols like `direct communication' and `quantum dialogue'. The encoding exploits the phase degree of freedom of a photon, thus paving the way to an optical fiber implementation, feasible with present day technology.
description: 4 pages, 2 figures; one reference updated
Análisis multisectorial de las intensidades energéticas en España
Creators: name: Cansino, Jose Manuel
name: Cardenete, Manuel Alejandro
name: Ordonez, Manuel
name: Roman, Rocio
name: Cansino, Jose Manuel
name: Cardenete, Manuel Alejandro
name: Ordonez, Manuel
name: Roman, Rocio
Publisher: name: Unknown
Year: 2012
Subjects: subject: Resource /Energy Economics and Policy
subject: Energy intensity
subject: social accounting matrix
subject: energy multipliers

description: Este artículo estima las intensidades energéticas sectoriales de la economía española. Para ello se aplica el análisis de multiplicadores a la Matriz de Contabilidad Social para España del año 2006 elaborada por Ordóñez (2011) en diversos escenarios derivados de la endogeneización de las cuentas de Trabajo, Capital, Consumo e Inversión. Los resultados muestran que existen importantes variaciones entre sectores y que los mismos se enriquecen con la endogeneización de las cuentas. Los propios sectores energéticos son los que mayores necesidades presentan, junto con otros como Materiales de construcción, Industria química y Transportes y comunicaciones.
Visualizing intestines for diagnostic assistance of ileus based on intestinal region segmentation from 3D CT images
Creators: name: Oda, Hirohisa
name: Nishio, Kohei
name: Kitasaka, Takayuki
name: Amano, Hizuru
name: Takimoto, Aitaro
name: Uchida, Hiroo
name: Suzuki, Kojiro
name: Itoh, Hayato
name: Oda, Masahiro
name: Mori, Kensaku
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: This paper presents a visualization method of intestine (the small and large intestines) regions and their stenosed parts caused by ileus from CT volumes. Since it is difficult for non-expert clinicians to find stenosed parts, the intestine and its stenosed parts should be visualized intuitively. Furthermore, the intestine regions of ileus cases are quite hard to be segmented. The proposed method segments intestine regions by 3D FCN (3D U-Net). Intestine regions are quite difficult to be segmented in ileus cases since the inside the intestine is filled with fluids. These fluids have similar intensities with intestinal wall on 3D CT volumes. We segment the intestine regions by using 3D U-Net trained by a weak annotation approach. Weak-annotation makes possible to train the 3D U-Net with small manually-traced label images of the intestine. This avoids us to prepare many annotation labels of the intestine that has long and winding shape. Each intestine segment is volume-rendered and colored based on the distance from its endpoint in volume rendering. Stenosed parts (disjoint points of an intestine segment) can be easily identified on such visualization. In the experiments, we showed that stenosed parts were intuitively visualized as endpoints of segmented regions, which are colored by red or blue.
Estudio de la causalidad de los incendios forestales en Galicia
Creators: name: Barreal, Jesus
name: Loureiro, Maria L.
name: Picos, Juan
name: Barreal, Jesus
name: Loureiro, Maria L.
name: Picos, Juan
Publisher: name: Unknown
Year: 2012
Subjects: subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: Cause-effect relationship
subject: socio-economic factors
subject: climatology
subject: regression

description: El objetivo de este trabajo es estudiar la relevancia de los múltiples factores socio-económicos,agrarios y ambientales en la ocurrencia de los incendios forestales en Galicia. Los modelos econométricos presentados analizan el número de incendios ocurridos así como el número de hectáreas quemadas, en función de los múltiples factores indicados. A raíz de los resultados obtenidos, se concluye que determinadas políticas públicas preventivas diseñadas hacia una reorientación el sector agro-ganadero, el cuidado de la pirámide poblacional y un mejor aprovechamiento de los usos del suelo, pueden ayudar a disminuir los incendios forestales en Galicia de forma significativa.
Reverse Janssen effect in narrow granular columns
Creators: name: Mahajan, Shivam
name: Tennenbaum, Michael
name: Pathak, Sudhir N.
name: Baxter, Devontae
name: Fan, Xiaochen
name: Padilla, Pablo
name: Anderson, Caleb
name: Fernandez-Nieves, Alberto
name: Ciamarra, Massimo Pica
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: When grains are added to a cylinder, the weight at the bottom is smaller than the total weight of the column, which is partially supported by the lateral walls through wall/grain frictional forces. This is known as the Janssen effect. Via a combined experimental and numerical investigation, here we demonstrate a reverse Jansen effect whereby the fraction of the weight supported by the base overcomes one. We characterize the dependence of this phenomenon on the various control parameters involved, rationalize the physical process responsible for the emergence of the compressional frictional forces responsible for the anomaly, and introduce a model to reproduce our findings. Contrary to prior assumptions, our results demonstrate that the constitutive relation on a material element can depend on the applied stress.
description: Supplementary material included; Editor suggestion; Featured in Physics