cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
How macroscopic laws describe complex dynamics: asymptomatic population and CoviD-19 spreading
Creators: name: Lanteri, D.
name: Carco', D.
name: Castorina, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Macroscopic growth laws, solutions of mean field equations, describe in an effective way an underlying complex dynamics. They are applied to study the spreading of infections, as in the case of CoviD-19, where the counting of the cumulated number $N(t)$ of detected infected individuals is a generally accepted, coarse-grain, variable to understand the epidemic phase. However $N(t)$ does not take into account the unknown number of asymptomatic, not detected, cases $A(t)$. Therefore, the question arises if the observed time series of data of $N(t)$ is a reliable tool for monitoring the evolution of the infectious disease. We study a system of coupled differential equations which includes the dynamics of the spreading among symptomatic and asymptomatic individuals and the strong containment effects due to the social isolation. The solution is therefore compared with a macroscopic law for the population $N(t)$ coming from a single, non-linear, differential equation with no explicit reference to $A(t)$, showing the equivalence of the two methods. Indeed, $N(t)$ takes into account a more complex and detailed population dynamics which permits the evaluation of the number of asymptomatic individuals also. The model is then applied to Covid-19 spreading in Italy where a transition from an exponential behavior to a Gompertz growth for $N(t)$ has been observed in more recent data. Then the information contained in the data analysis of $N(t)$ is reliable to understand the epidemic phase, although it does not describe the total infected population. The asymptomatic population is larger than the symptomatic one in the fast growth phase of the spreading.
Studying Coulomb correction at EIC and EicC
Creators: name: Sun, Ze-hao
name: Zheng, Du-xin
name: Zhou, Jian
name: Zhou, Ya-jin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the gauge link contribution to the dipole type transverse momentum dependent distributions of coherent photons, which is conventionally referred to as the Coulomb correction. We further propose to search for the evidence of the Coulomb correction in the Bethe-Heitler process in eA collisions at EIC and EicC.
description: 7 pages, 6 figures
Spectrum of quantized black hole, correspondence principle, and holographic bound
Creators: name: Khriplovich, I. B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An equidistant spectrum of the horizon area of a quantized black hole does not follow from the correspondence principle or from general statistical arguments. On the other hand, such a spectrum obtained in loop quantum gravity (LQG) either does not comply with the holographic bound, or demands a special choice of the Barbero-Immirzi parameter for the horizon surface, distinct from its value for other quantized surfaces. The problem of distinguishability of edges in LQG is discussed, with the following conclusion. Only under the assumption of partial distinguishability of the edges, the microcanonical entropy of a black hole can be made both proportional to the horizon area and satisfying the holographic bound.
description: 9 pages; a minor remark, due to misunderstanding, is deleted
Democratização do conhecimento na Era da Ciência Aberta: o papel dos softwares Livres e da Rede Moara na Inovação Científica e Tecnológica
Creators: name: Vechi, Bernardo Dionízio
name: César, Alda Melânia
name: Torres Schiessl, Ingrid
name: dos Santos de Moura, Rebeca
name: Rodrigues Costa, Lucas
name: Macêdo, Diego José
name: Shintaku, Milton
Publisher: name: Zenodo
Year: 2024

description: Apresentação realizada na sessão “O meu Póster em 1 minuto”, da 15ª Conferência Lusófona de Ciência Aberta, na Escola Superior de Enfermagem do Porto (ESEP), de 01 a 04 de outubro de 2024.
The Lee-Yang theory of equilibrium and nonequilibrium phase transitions
Creators: name: Blythe, R. A.
name: Evans, M. R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a pedagogical account of the Lee-Yang theory of equilibrium phase transitions and review recent advances in applying this theory to nonequilibrium systems. Through both general considerations and explicit studies of specific models, we show that the Lee-Yang approach can be used to locate and classify phase transitions in nonequilibrium steady states.
description: 24 pages, 7 papers, invited paper for special issue of The Brazilian Journal of Physics
Stripes on finite domains: Why the zigzag instability is only a partial story
Creators: name: Shapira, Alon Z.
name: Uecker, Hannes
name: Yochelis, Arik
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Stationary periodic patterns are widespread in natural sciences, ranging from nano-scale electrochemical and amphiphilic systems to mesoscale fluid, chemical and biological media and to macro-scale vegetation and cloud patterns. Their formation is usually due to a primary symmetry breaking of a uniform state to stripes, often followed by secondary instabilities to form zigzag and labyrinthine patterns. These secondary instabilities are well studied under idealized conditions of an infinite domain, however, on finite domains, the situation is more subtle since the unstable modes depend also on boundary conditions. Using two prototypical models, the Swift-Hohenberg equation and the forced complex Ginzburg-Landau equation, we consider bounded domains with no flux boundary conditions transversal to the stripes, and reveal a distinct mixed-mode instability that lies in between the classical zigzag and the Eckhaus lines. This explains the stability of stripes in the mildly zigzag unstable regime, and, after crossing the mixed-mode line, the evolution of zigzag stripes in the bulk of the domain and the formation of defects near the boundaries. The results are of particular importance for problems with large time scale separation, such as bulk-heterojunction deformations in organic photovoltaic and vegetation in semi-arid regions, where early temporal transients may play an important role.
description: 7 pages, 5 figures
title: Literarisches und wissenschaftliches Schreiben: Potenziale und Wechselwirkungen – zur Einführung
Creators: name: Rickert, Alex
name: Ammann, Daniel
name: Altorfer, Erik
Publisher: name: hep
Year: 2023

description: Beim Schreiben kann man alles falsch, aber nie alles richtig machen. Im literarischen und wissenschaftlichen Schreiben sind Regeln wichtig, aber vielmehr noch die Kreativität. Auch ein Fachtext erzählt, und ein Roman antwortet auf Fragen. Betreuende von wissenschaftlichen Arbeiten, Schreibcoachs und Lektor*innen zeigen in ihren Beiträgen, dass kreatives Schreiben in allen Formaten ein unverzichtbares Denk-, Lern- und Ausdrucksinstrument ist. - In der Einführung werden die Wechselwirkungen ausgelotet.
Neutralino pair production at CERN LHC
Creators: name: Gounaris, G. J.
name: Layssac, J.
name: Porfyriadis, P. I.
name: Renard, F. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the production of neutralino pairs $\tchi^0_i\tchi^0_j$ at a high energy hadron collider, putting a special emphasis on the case where one of them is the lightest neutralino $\tchi^0_1$, possibly constituting the main Dark Matter component. At tree level, the only relevant subprocess is $q\bar q\to \tchi^0_i\tchi^0_j$, while the subprocess $gg\to \tchi^0_i\tchi^0_j$ first appears at the one loop level. Explicit expressions for the $q\bar q$-helicity amplitudes are presented, including the tree level contributions and the leading-log one loop radiative corrections. For the one-loop $ gg\to \tchi^0_i\tchi^0_j$ process, a numerical code named PLATONggnn is released, allowing the computation of $dσ/d \that$ in any MSSM model with real soft breaking parameters. It turns out that acceptable MSSM benchmark models exist for which the $q\bar q $ and the gluonic contributions may give comparable effects at LHC, due to the enhanced gluonic structure functions at low fractional momenta. Depending on the values of the MSSM parameters, we find that the LHC neutralino pair production may provide sensitive tests of SUSY models generating neutralino Dark Matter.
description: 30 pages and 12 figures, version to appear in Phys.Rev.D
CHANGES IN AGRICULTURE OF THE GREEN REVOLUTION STATES: IMPLICATIONS FOR AGRICULTURAL DEVELOPMENT
Creators: name: Pal, Suresh
name: Birthal, Pratap S.
name: Mruthyunjaya
name: Pal, Suresh
name: Birthal, Pratap S.
name: Mruthyunjaya
Publisher: name: Unknown
Year: 1992
Subjects: Agricultural and Food Policy
Crop Production/Industries

description: This paper examines the changes in the agriculture of green revolution states. The results revealed that a decrease in the share of agriculture in state domestic product was not accompanied by appropriate fall in the workers in agriculture. Consequently, man-land ratio increased over time, markedly in West U.P. The share of purchased and energy based inputs has increased over the years and formed about 50 per cent of the operational cost. The share of capital in gross value added was substantially higher than that of human labour in the production of wheat, whereas the share of capital and human labour was almost equal in the case of paddy. A sharp decline in the returns to management in the production of wheat calls for developing cost saving technology and reappraisal of price policy.
DYNAMICS OF LAND USE IN DIFFERENT STATES OF INDIA
Creators: name: Sharma, Umesh Kumar
name: Pandey, V. K.
name: Sharma, Umesh Kumar
name: Pandey, V. K.
Publisher: name: Unknown
Year: 1992
Subjects: Agricultural and Food Policy
Land Economics/Use

description: The study examines the trends and dynamics of annual shifts among different land use classes in Indian States which may have adverse implica­ tions for agricultural growth and ecological balance. A general declining trend was observed in the area under permanent pastures and grazing lands and barren and unculturable lands. The area under non-agricultural uses, cultivable wastes and fallow showed a positive growth in most of the States. Jntersectoral land budgeting revealed that area sh'fts are occuring from both desirable and undesirable ecology sectors towards agricultural as well as non-agricultural sectors. Further, the study identifies the operation of vicious circle of land use dynamics within agricultural sector.
Copy of Moon mean center (calendrical)_Tabule magne_Critical edition by Husson (Matthieu) (2022) | Type-B (ID n° 935)
Creators: name: Husson, Matthieu
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2022
Subjects: History of astronomy
DISHAS
Astronomical table
Astronomy

description: This is a type B edition: A type-B edition corresponds to a critical edition of several table witnesses:
 it is based on several different editions, themselves based on tables from different primary sources.
 A type-B edition can be based on type-A, type-B or type-C editions.
You can find it on the DISHAS project website from this link: https://dishas.obspm.fr/table-edition/935
ISAJON SULTONNING "TODD" HIKOYASIDA RAMZIYLIK
Creators: name: Orazbaeva, Asal
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada oʻzbek adabiyotining zabardast vakillaridan biri boʻlgan Isajon Sulton ijodidagi oʻziga xoslik, yozuvchining ijodiy mahorati haqida soʻz yuritilgan. Tadqiqot obyekti sifatida yozuvchining “Todd” hikoyasi olingan. Hikoyadagi ramziy va timsoliy obrazlar, ramziy detallarga alohida e’tibor berilgan.
Electrical Characterization of CIGS Thin Film Solar Cells by Two and Four-Wires Probe Technique
Creators: name: Mosavi, Amirhosein
name: Bertalan, Beszedes
name: Imre, Felde
name: Nadai, Laszlo
name: Gorji, Nima E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The characterization of thin film solar cells is of huge importance for obtaining high open circuit voltage and low recombination rates from the interfaces or within the bulk of the main materials. Among the many electrical characterization techniques, the two and four wire probe using the Cascade instrument is of interest since the resistance of the wires, and the electrical contacts can be excluded by the additional two wires in 4 wire probe configuration. In this paper, both two and four-point probes configuration are employed to characterize the CIGS chalcogenide thin film solar cells. The two wire probe has been used to measure the current-voltage characteristics of the cell which results in a huge internal resistance. Therefore, the four wire connection are also used to eliminate the lead resistance to enhance the characterization accuracy. The load resistance in the twowire probe diminishes the photogenerated current density at smaller voltage ranges. In contrast, the proposed four wire probe collects more current at higher voltages due to enhanced carrier collection efficiency from contact electrodes. The current conduction mechanism is also identified at every voltage region represented by the value of the ideality factor of that voltage region.
description: 16 pages, 7 figures
REGION-WISE GAINS FROM AGRICULTURAL GROWTH: MEASUREMENT AND FACTOR ANALYSIS
Creators: name: Satyasai, K. J. S.
name: Satyasai, K. J. S.
Publisher: name: Unknown
Year: 1992
Subjects: Agricultural and Food Policy
Land Economics/Use

description: This paper examines the regional disparities among major states of India. It also identifies the factors responsible for these disparities. Between the triennia 1960-63 and 1982-85 North-Western India (the wheat belt) alone accounted for about 30 per cent of the output gains at all-India level. The other regions, in comparison, performed rather poorly. Technological factors such as H YV-seed, irrigation, fertiliser and mechanisation as well as technology supporting factors like infrastructure are responsible for the disparate growth of agriculture among states. The rank correlation coefficients between these two sets of factors, on one hand, and the output gains on the other are 0.56 and 0.68, respectively.
Genomes of scv loci–positive bacteria species (annotated using RAST)
Creators: name: Liu, Ming
Publisher: name: figshare
Year: 2022
Subjects: subject: 60501 Bacteriology
subject: FOS: Biological sciences
subject: 60408 Genomics
subject: Microbiology

description: Genomes of scv loci–positive bacteria species (annotated using RAST)
Bit Error Rate Analysis of M-ARY PSK and M-ARY QAM Over Rician Fading Channel
Creators: name: Bharati, Subrato
name: Rahman, Mohammad Atikur
name: Podder, Prajoy
name: Islam, Muhammad Ashiqul
name: Hossain, Mohammad
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper mainly illustrates the Bit error rate performance of M-ary QAM and M-ary PSK for different values of SNR over Rician Fading channel. A signal experiences multipath propagation in the wireless communication system which causes expeditious signal amplitude fluctuations in time, is defined as fading. Rician Fading is a small signal fading. Rician fading is a hypothetical model for radio propagation inconsistency produced by fractional cancellation of a radio signal by itself and as a result the signal reaches in the receiver by several different paths. In this case, at least one of the destination paths is being lengthened or shortened. From this paper , it can be observed that the value of Bit error rate decreases when signal to noise ratio increases in decibel for Mary QAM and M-ary PSK such as 256 QAM, 64 PSK etc. Constellation diagrams of M-QAM and M-PSK have also been showed in this paper using MATLAB Simulation. The falling of Bit error rate with the increase of diversity order for a fixed value of SNR has also been included in this paper. Diversity is a influential receiver system which offers improvement over received signal strength.
description: 5 pages, 6 figures
title: Hydrated Clusters of Nucleic Acid Bases in Supersonic Beams Probed by Multiphoton Ionization (MPI) Mass Spectrometry
Creators: name: Barć, Bartlomiej
Publisher: name: The Open University
Year: 2012

description: In the present thesis clusters of nucleic acid bases and water are used as model systems of cellular DNA to investigate UV induced radiation damage in the gas phase. A new experimental system has been designed and commissioned to perform multiphoton ionization experiments on hydrogen bonded clusters of the nucleic acid bases: adenine, thymine and uracil, as well as on the related chromophores: 5-fluorouracil and hypoxanthine. As the result of pulsed nanosecond laser irradiation in the wavelength range of 220-230 nm, cluster, monomer and fragment ions were detected using a time-of-flight mass spectrometer. Possible multiphoton ionization pathways of clustered and isolated molecules including the role played by short (singlet) and long-lived (triplet) excited states as well as excited state tautomeric transitions are discussed. Signal intensities as a function of laser pulse fluence were measured. The slope of a logarithmic plot of the signal intensity versus fluence yields the so-called ‘photon order’ and provides information on the number of photons leading to the production of cluster, monomer and fragment ions. The results indicate two-photon ionization for uracil and thymine in dry molecular beams (i.e. photon orders equal to 1.9±0.2 and 1.4±0.1, respectively). An interesting result in the form of photon order equal to 3.0±0.5 has been measured for adenine in a dry molecular beam irradiated with an unfocused laser beam. This suggests a three photon ionization process, however further experimental work is required in order to exclude factors related to stability of the laser beam spatial profile. Hydrated cluster ions with up to 7 water molecules attached to a single uracil and 4 water molecules attached to adenine were unambiguously identified after adding water vapour to the molecular beam source. A maximum of 7 water molecules attached to adenine-uracil base pairs were detected. Possible ionization pathways of such hydrated clusters mediated by excited states tautomeric transitions are discussed. On the basis of photon orders measured under hydrated conditions, it is proposed that sequential MPI processes with 2, 3, and 4 photon absorption lead to production of cluster ions, cluster fragment ions (including protonated monomers), and molecular fragment ions, respectively.
The UBC Food System Project Summary Report 2009
Creators: name: Baker-French, Sophia
name: Richer, Liska
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Single-atom trajectories in higher-order transverse modes of a high-finesse optical cavity
Creators: name: Puppe, T.
name: Maunz, P.
name: Fischer, T.
name: Pinkse, P. W. H.
name: Rempe, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Transits of single atoms through higher-order Hermite-Gaussian transverse modes of a high-finesse optical cavity are observed. Compared to the fundamental Gaussian mode, the use of higher-order modes increases the information on the atomic position. The experiment is a first experimental step towards the realisation of an atomic kaleidoscope.
description: 6 pages, d figures
Nudging Students to an Authentic Learning Experience and Educational Outcomes
Creators: name: Sharp, Misti
name: Sharp, Misti
Publisher: name: Unknown
Year: 2018
Subjects: subject: Teaching/Communication/Extension/Profession
subject: teaching
subject: learning
subject: economics

description: There is a flurry of research suggesting that active classroom settings, including but not limited to the flipped classroom or team-based learning, constitute best pedagogical practices. These approaches preclude an authentic learning experience for students who do not feel comfortable contributing in such a setting and those for whom a social setting is distracting. This research approaches the research problem: does nudging students to find the style of learning that works best for them lead to an improvement in course engagement and class performance? At the beginning of the semester in intermediate level environmental economics and agricultural statistics courses at the University of Florida, students were given a learning style assessment and asked to reflect on how they should engage in the course based on the outcomes of the assessment. Throughout the semester, opportunities were given to allow students to choose the path of course engagement that worked best for the individual learner. At the end of the semester, students were then surveyed on how they engaged in the course and how a reminder of their learning style influenced their study habits in these courses. This research informs how the cultivation of authentic learning experiences influences educational outcomes.
Lattice Bisognano-Wichmann modular Hamiltonian in critical quantum spin chains
Creators: name: Zhang, Jiaju
name: Calabrese, Pasquale
name: Dalmonte, Marcello
name: Rajabpour, M. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We carry out a comprehensive comparison between the exact modular Hamiltonian and the lattice version of the Bisognano-Wichmann (BW) one in one-dimensional critical quantum spin chains. As a warm-up, we first illustrate how the trace distance provides a more informative mean of comparison between reduced density matrices when compared to any other Schatten $n$-distance, normalized or not. In particular, as noticed in earlier works, it provides a way to bound other correlation functions in a precise manner, i.e., providing both lower and upper bounds. Additionally, we show that two close reduced density matrices, i.e. with zero trace distance for large sizes, can have very different modular Hamiltonians. This means that, in terms of describing how two states are close to each other, it is more informative to compare their reduced density matrices rather than the corresponding modular Hamiltonians. After setting this framework, we consider the ground states for infinite and periodic XX spin chain and critical Ising chain. We provide robust numerical evidence that the trace distance between the lattice BW reduced density matrix and the exact one goes to zero as $\ell^{-2}$ for large length of the interval $\ell$. This provides strong constraints on the difference between the corresponding entanglement entropies and correlation functions. Our results indicate that discretized BW reduced density matrices reproduce exact entanglement entropies and correlation functions of local operators in the limit of large subsystem sizes. Finally, we show that the BW reduced density matrices fall short of reproducing the exact behavior of the logarithmic emptiness formation probability in the ground state of the XX spin chain.
description: 27 pages 11 Figures V2: minor changes
A Relation Between Supermassive Black Hole Mass and Quasar Metallicity?
Creators: name: Warner, Craig
name: Hamann, Fred
name: Dietrich, Matthias
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze spectra for a large sample of 578 Active Galactic Nuclei to examine the relationships between broad emission line properties and central supermassive black hole (SMBH) mass. We estimate SMBH masses by applying the virial theorem to the C IV lambda 1549 broad emission line. Although the FWHMs of C IV and H beta appear nearly unrelated in individual objects, these FWHMs are well correlated when averaged over sub-samples in our database. Therefore, the lines are equally valid indicators of the average SMBH mass in quasar samples. Our sample spans five orders of magnitude in SMBH mass, six orders of magnitude in luminosity, and a redshift range from 0 <= z <= 5. Most lines diminish in equivalent width with increasing black hole mass (the usual "Baldwin Effect") and there are no trends with redshift. Recent studies indicate that there is a relationship between SMBH mass and the overall bulge/spheroidal component mass of the surrounding galaxy. This relation, together with the well-known mass-metallicity relationship among galaxies, predicts a relationship between SMBH mass and quasar metallicity. We estimate the metallicity in the broad emission line region by comparing several line ratios involving nitrogen to theoretical predictions. We find that the data are consistent with a trend between SMBH mass and metallicity, with some line ratios indicating a very strong trend, but the uncertainties in several other important line ratios are too large to confirm or test this correlation.
description: 21 pages, including 11 figures and 2 tables
Experimental study of continuous variable quantum key distribution
Creators: name: Benletaief, Nedra
name: Rezig, Houria
name: Bouallegue, Ammar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: It has been proven in the literature that the main technological factors limiting the communication rates of quantum cryptography systems by single photon are mainly related to the choice of the encoding method. In fact, the efficiency of the used sources is very limited, at best of the order of a few percent for the single photon sources and the photon counters can not be operated beyond a certain speed and with a low order of detection efficiency. In order to overcome partially these drawbacks, it is advantageous to use continuous quantum states as an alternative to standard encodings based on quantum qubits. In this context, we propose a new reconciliation method based on Turbo codes. Our theoretical model assumptions are supported by experimental results. Indeed, our method leads to a significant improvement of the protocol security and a large decrease of the QBER. The gain is obtained with a reasonable complexity increase. Also, the novelty of our work is that it tested the reconciliation method on a real photonic system under VPItransmissionMaker.
FEEDING DYNAMICS AND GROWTH CHARACTERISTICS OF SARDINELLA MADERENSIS IN RIVERS STATE'S NEW CALABAR RIVER
Creators: name: David, Chinedu Okoro
Publisher: name: NOLAND JOURNALS
Year: 2024
Subjects: Clupeids, foods, habits, feeding, condition

description: Samples of Sardinella maderensis were collected from New Calabar River, Port Harcourt Rivers State Nigeria, for the study of its food and growth. Food studies were done using frequency of occurrence and points method. While growth data was subjected to regression analysis, condition factor was estimated using fulton’s equation (k = W100/L3) Analysis of food importance by Index of food significance (IFS) had Melosira varians (13.30%) and Melosira distans as the most preferred items for the small (9.0 – 12.0cm) and big (13 – 13.5cm) groups respectively. Other food items found in the fish gut were Melosira ambigua, Melosira italic, Melosira granulate. Cyclotella comate, Cyclotella glomerata, Cyclotella atomus, Cyclotella ocellata, Diatoma elegatum, Fragineria capusina, Pinularia sp, Synedria tabutata, and Tabellaria flocullosa. Analysis of length–weight data indicated that the fish had a negative allometric growth (2.1717±0.0624), with condition factor of 0.9160±0.047. This study revealed that Sardinella maderensis feed predominantly on algae and would therefore require a moderate protein compounded feed for rearing in captivity.
title: 1741-1742. Chandeliers contre Épiciers
Creators: name: Généro, Jean-Damien
name: Marraud, Mathieu
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2025
Subjects: subject: Corporation
subject: Métiers
subject: France, Pays de (France)
subject: Factum
subject: Histoire moderne

description: Fichiers XML, TEX et PDF du dossier « Chandeliers contre Épiciers » du programme de recherche « Factums des métiers » (https://factums-metiers.huma-num.fr) du Centre de recherches historiques (UMR 8558), porté par Mathieu Marraud.
description: Source: https://factums-metiers.huma-num.fr/exist/apps/factums/chandeliers_contre_epiciers.html
description: 1. "Réponses pour François Pochet, Pierre Berthelin de Neuville, Charles-Gabriel-François Duval & Pierre-Augustin Veupierre, Jurez Huiliers, Gardes du Coin & de l'Etalon-Royal des Mesures à Huile, Intimez, Deffendeurs & Demandeurs. Contre les Maîtres & Gardes Epiciers, Appellans, Demandeurs & Deffendeurs." (1741). BNF, Ms français 21738 (Fol.342) [1741] [imprimé].

2. "Sans titre." (1742). BIUP, R12-37 [1742] [manuscrit].

3. "Memoire en la Cause, pour les Jurez Huiliers, Gardes du Coin & de l'Etalon-Royal de Mesures à Huiles, Saisissans, demandeurs & deffendeurs. Contre le Sieur Claret & autres, Marchands Epiciers, Parties saisies. Et encore contre les Maîtres & Gardes Epiciers, prenant leur fait & cause, demandeurs & deffendeurs." (1742). BNF, FOL-FM-12920 [1742] [imprimé].
description: Alors que le point d'achoppement entre corporations reste souvent lié aux démarcations, floues, qui séparent commerce de gros et commerce de détail, il peut emprunter d'autres voies attachées aux gestes commerciaux, et aux débits ordinaires des marchandises. La mesure même des produits, à la suite des ordonnances royales, oppose elle aussi les métiers, comme c'est le cas ici entre chandeliers et épiciers.

Si les deux corporations se partagent à un même moment la vente au détail des huiles (à consommer, à brûler) dans Paris, elles peuvent utiliser la modalité même du débit, au volume ou au poids, pour entrer en concurrence, pour s'inspecter l'une l'autre, pour diligenter plusieurs opérations de police. Tels deux ordres de grandeur, à la fois matérielle et sociale, le volume et le poids renvoient à des outillages différents en même temps qu'à des rapports différents avec la clientèle.
ECONOMIC FACTS ABOUT TRACTORS
Creators: name: University Of Nottingham
name: University Of Nottingham
Publisher: name: Unknown
Year: 1952
Subjects: Agricultural Finance
Research and Development/Tech Change/Emerging Technologies

description: The 20th century is often spoken of as the machine age, the term being used chiefly with reference to factory production. But in many ways this term applies with even more relevance to farming - the range of rachinery which has come to be considered necessary on many farms having expanded considerably since the century began. Among these machines which are now almost thought of as being essential on most farms is the tractor - and even whore it is not considered essential it is frequently installed for other cogen-b reasons. This attitude of mind towards tractors has only existed during the past decade or so, and is exemplified by the six fold increase that has occurred in the number of tractors on farms in England and Wales since 1939. The introduction of a tractor, however, is not without its problems. Amongst those which might be listed are:- what amount of capital will be required to buy the tractor? what are the alternative uses of this capital? will the tractor replace any horses and, if so, haw many? what difference will the tractor make to current farm expenses and more important to current net income? and what io the expected working life of the tractor? This report based on the actual. experience of farmers in thg East Midlands(1) attempts to answer some, but not all, of these questions. The first two sections are based on two enquiries conducted amongst farmers and the third on the analysis of published statistics.
Extrapolation Method for the No-Core Shell Model
Creators: name: Zhan, H.
name: Nogga, A.
name: Barrett, B. R.
name: Vary, J. P.
name: Navratil, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Nuclear many-body calculations are computationally demanding. An estimate of their accuracy is often hampered by the limited amount of computational resources even on present-day supercomputers. We provide an extrapolation method based on perturbation theory, so that the binding energy of a large basis-space calculation can be estimated without diagonalizing the Hamiltonian in this space. The extrapolation method is tested for 3H and 6Li nuclei. It will extend our computational abilities significantly and allow for reliable error estimates.
description: 8 pages, 7 figures, PRC accepted
DivideMix: Learning with Noisy Labels as Semi-supervised Learning
Creators: name: Li, Junnan
name: Socher, Richard
name: Hoi, Steven C. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep neural networks are known to be annotation-hungry. Numerous efforts have been devoted to reducing the annotation cost when learning with deep networks. Two prominent directions include learning with noisy labels and semi-supervised learning by exploiting unlabeled data. In this work, we propose DivideMix, a novel framework for learning with noisy labels by leveraging semi-supervised learning techniques. In particular, DivideMix models the per-sample loss distribution with a mixture model to dynamically divide the training data into a labeled set with clean samples and an unlabeled set with noisy samples, and trains the model on both the labeled and unlabeled data in a semi-supervised manner. To avoid confirmation bias, we simultaneously train two diverged networks where each network uses the dataset division from the other network. During the semi-supervised training phase, we improve the MixMatch strategy by performing label co-refinement and label co-guessing on labeled and unlabeled samples, respectively. Experiments on multiple benchmark datasets demonstrate substantial improvements over state-of-the-art methods. Code is available at https://github.com/LiJunnan1992/DivideMix .
title: The Attenuation of Sunlight by Airborne Dust Particles on Earth and Mars
Creators: name: Mason, Jonathon Peter
Publisher: name: The Open University
Year: 2013

description: This thesis details an investigation into how dust and ice aerosols in the atmosphere of Earth and Mars affect the solar spectrum from the ultraviolet to the near infrared, allowing the characterisation of the aerosols using broad band surface measurements. A Monte Carlo Light Scattering Model (MCLSM) was developed to predict the optical signature of terrestrial and martian dust devils. The MCLSM was applied to measurements taken in the Eldorado Valley, U.S.A. Transit signatures were found to be dependent on the method of observation. The transit signature measured in scattered light depends on the dust concentration and distribution in contrast to the total light transit signature, which depends primarily on the column-integrated dust optical depth. On Mars the high diffuse irradiance provides better definition of the vortex interior within the transit signature, with wavelengths between 600-750 nm optimal for detecting a transit. To determine the vortex size and dust concentration, both the total and the scattered light must be measured. Retrieval of the dust optical properties showed that spectral measurements and the calculated mass concentration were sensitive to the presence of small particles (0.5-5.0 μm). A comparison of the downward irradiance for two distinct dust components suggests that dust with a higher absorption at visible wavelengths causes increased heating at higher altitudes, leading to a more statically-stable atmosphere, which may result in more rapid decay of large-scale dust storms. The investigations have also shown that variations in single scattering properties can lead to -20% difference in the daily UV-C dose. A method was devised to distinguish compositional changes in the ubiquitous martian dust haze and validated against wind tunnel experiments. This technique is applicable to determine the size of water-ice crystals in clouds and the optical depth of the dust haze at the time of the cloud passage.
Vaidya collapse with nonzero radial pressure and charge
Creators: name: Beesham, Aroonkumar
Publisher: name: Mangosuthu University of Technology (MUT)
Year: 2022
Subjects: subject: 20103 Cosmology and Extragalactic Astronomy
subject: FOS: Physical sciences
subject: 20110 Stellar Astronomy and Planetary Systems

description: The cosmic censorship hypothesis is regarded as one of the most important unsolved problems in classical general relativity; viz., will generic gravitational collapse of a star after it has exhausted its nuclear fuel lead to black holes only, under reasonable physical conditions. We discuss the collapse of a fluid with nonzero radial pressure within the context of the Vaidya spacetime considering a decaying cosmological parameter as well as nonzero charge. Previously, a similar analysis was done, but without considering charge. A decaying cosmological parameter may also be associated with dark energy. We found that both black holes and naked singularities can form, depending upon the initial conditions. Hence, charge does not restore the validity of the hypothesis. This provides another example of the violation of the cosmic censorship hypothesis. We also discuss some radiating rotating solutions, arriving at the same conclusion.
Sustainable Paint
Creators: name: Heisler, R. Sean
name: Wong, Larry
name: Lu, Jason
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Influence of microwave fields on the electron transport through a quantum dot in the presence of a direct tunneling between leads
Creators: name: Taranko, R.
name: Kwapinski, T.
name: Taranko, E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider the time-dependent electron transport through a quantum dot coupled to two leads in the presence of the additional over-dot (bridge) tunneling channel. By using the evolution operator method together with the wide-band limit approximation we derived the analytical formulaes for the quantum dot charge and current flowing in the system. The influence of the external microwave field on the time-average quantum dot charge, the current and the derivatives of the average current with respect to the gate and source-drain voltages has been investigated for a wide range of parameters.
description: 28 Pages, 11 Postscript figures
A New Boson realization of Fusion Polynomial Algebras in Non-Hermitian Quantum Mechanics : $γ$-deformed $su(2)$ generators, Partial $\mathcal{PT}$-symmetry and Higgs algebra
Creators: name: Chakraborty, Arindam
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A $γ$-deformed version of $su(2)$ algebra with non-hermitian generators has been obtained from a bi-orthogonal system of vectors in $\bf{C^2}$. The related Jordan-Schwinger(J-S) map is combined with boson algebras to obtain a hierarchy of fusion polynomial algebras. This makes possible the construction of Higgs algebra of cubic polynomial type. Finally the notion of partial $\mathcal{PT}$ symmetry has been introduced as characteristic feature of some operators as well as their eigenfunctions. The possibility of partial $\mathcal{PT}$-symmetry breaking is also discussed. The deformation parameter $γ$ plays a crucial role in the entire formulation and non-trivially modifies the eigenfunctions under consideration.
title: Cooling Fractures in Lavas: Mechanisms and Environments of Formation
Creators: name: Forbes, Anne
Publisher: name: The Open University
Year: 2013

description: The focus of this study is cooling fractures in lavas that are associated with environments containing ice, snow or liquid water. Two main fracture types feature in this study: columnar jointing and pseudopillow fractures. This thesis addresses how and why these fractures form in particular environments.

Columnar jointing in rhyolite lava is particularly common in subglacial environments and rare in subaerial or purely subaqueous environments. Five subglacial rhyolites are studied with the presentation of the first set of measurements from subglaical rhyolite columns, showing considerably smaller column sizes and striae widths than in basalts. Some simple modelling was undertaken in order to explain these differences.

Pseudopillow fractures consist of a large, metre-scale, master fracture with many smaller, centimetre-scale, subsidiary fractures perpendicular to the master fracture. They are found in lava compositions from basalt to rhyolite. All documented occurrences are in lavas that have been inferred to have interacted with liquid water, ice or snow. The term pseudopillow fracture system is proposed to describe the consistent package of two different fracture types occurring together. Pseudopillow fracture systems were studied in two different trachyandesite lava flows. Three different master fracture types were identified on the basis of fracture surface textures displaying either chisel marks, cavitation dimples, or river lines and rough/smooth textures. Two types of subsidiary fractures were identified on the basis of their morphology: polygonal and planar subparallel.

The fractures in entablature, a formation common in basalt lava flows that have been inundated with water, were studied. Entablature was found to contain pseudopillow fracture systems and columnar jointing, which interact to form chevron fracture patterns. Master fractures form by ductile fracture of evolved residual melt, and show evidence of rapid cooling, related to coolant ingress. Two end members were identified: cube-jointing and column-bearing entablature, resulting from faster cooling in cube-jointed entablature.
Experimental study and pratical realization of a reconciliation method for quantum key distribution system
Creators: name: Benletaief, Nedra
name: Rezig, Houria
name: Bouallegue, Ammar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This paper investigates a reconciliation method in order to establish an errorless secret key in a QKD protocol. Classical key distribution protocols are no longer unconditionally secure because computational complexity of mathematical problems forced hardships. In this context, QKD protocols offer a highest level of security because they are based on the quantum laws of physics. But, the protocol performances can be lowered by multiples errors. It appears clearly that reconciliation should be performed in such a situation in order to remove the errors as for the legitimate partners. The proposed method accomplishes reconciliation by using QTC in the special problem of sideinformation source coding (Slepian-Wolf coding model). Our theoretical hypothesis are sustained by experimental results that confirm the advantage of our method in resolving reconciliation problem compared to a recent related work. Indeed, the integration of our method generates an important progess in security and a large decrease of the QBER. The gain is obtained with a reasonable complexity increase. Also, the novelty of our work is that it tested the reconciliation method on a real photonic system under VPItransmissionMaker.
description: 6 pages, 9 figures, conference