cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Renovação metodológica no ensino primário: o olhar de um estudante estagiário
Creators: name: Graça, Vânia
name: Quadros-Flores, Paula
name: Ramos, Altina
Publisher: name: Sensos-e
Year: 2019

description: Desenvolver o perfil docente e discente no século XXI pressupõe um novo olhar sobre os modos de ensinar e de aprender. Esta investigação tem como objetivo verificar como é que a integração de recursos digitais e também em suporte físico, em sala de aula, promove oportunidades: (1) que preparam o futuro professor para o imprevisto, a complexidade e a capacidade de inovar; (2) que preparam as crianças com conhecimentos, atitudes, capacidades e valores que lhes permitam enfrentar já o presente e também o futuro. Optou-se por um caso de estudo com uma abordagem de natureza qualitativa. Os dados foram recolhidos através de narrativa reflexiva realizada pela estudante estagiária e das entrevistas realizadas às crianças e à professora cooperante. Recorreu-se a análise de conteúdo como estratégia de análise de dados. Da análise da narrativa reflexiva da estudante estagiária verifica-se que existiram três momentos importantes durante o processo da sua formação: o desenho dos planos de ação, a intervenção e reflexão pós-ação. As categorias de análise que emergem em cada um dos momentos configuram um referencial sobre a consciência de si (limites, potencialidades), a compreensão dos factos (oportunidades e desafios) e o sentido criativo e crítico face as situações concretas do dia a dia da prática pedagógica. A análise das entrevistas revela que a metodologia e os recursos utilizados pela estudante estagiária respondem ao atual perfil do aluno à saída da escolaridade obrigatória, O Perfil dos Alunos à Saída da Escolaridade, homologado pelo Despacho n.o 6478/2017, 26 de julho de 2017. Conclui-se, assim, que, por um lado, o trabalho efetuado pela estudante estagiária contribuiu para o seu desenvolvimento profissional e pessoal e, por outro, estimulou nas crianças muitas das competências constantes no documento acima referido.
description: Sensos-e, Vol 6 No 2 (2019): INW2019
Several Roman domination graph invariants on Kneser graphs
Creators: name: Zec, Tatjana
name: Grbić, Milana
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: This paper considers the following three Roman domination graph invariants on Kneser graphs:
 Roman domination, total Roman domination, and signed Roman domination.
 For Kneser graph $K_{n,k}$, we present exact values for Roman domination number $γ_{R}(K_{n,k})$ and total Roman domination number $γ_{tR}(K_{n,k})$ proving that for $n\geqslant k(k+1)$, $γ_{R}(K_{n,k}) =γ_{tR}(K_{n,k}) = 2(k+1)$. For signed Roman domination number $γ_{sR}(K_{n,k})$, the new lower and upper bounds for $K_{n,2}$ are provided: we prove that for $n\geqslant 12$, the lower bound is equal to 2, while the upper bound depends on the parity of $n$ and is equal to 3 if $n$ is odd, and equal to $5$ if $n$ is even. For graphs of smaller dimensions, exact values are found by applying exact methods from literature.
A New Family of Integrable Extended Multi-band Hubbard Hamiltonians
Creators: name: Ambjorn, J.
name: Avakyan, A.
name: Hakobyan, T.
name: Sedrakyan, A.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider exactly solvable 1d multi-band fermionic Hamiltonians, which have affine quantum group symmetry for all values of the deformation. The simplest Hamiltonian is a multi-band t-J model with vanishing spin-spin interaction, which is the affinization of an underlying XXZ model. We also find a multi-band generalization of standard t-J model Hamiltonian.
description: 8 pages, LaTeX file, no figures
Discrete approaches to quantum gravity in four dimensions
Creators: name: Loll, R.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The construction of a consistent theory of quantum gravity is a problem in theoretical physics that has so far defied all attempts at resolution. One ansatz to try to obtain a non-trivial quantum theory proceeds via a discretization of space-time and the Einstein action. I review here three major areas of research: gauge-theoretic approaches, both in a path-integral and a Hamiltonian formulation, quantum Regge calculus, and the method of dynamical triangulations, confining attention to work that is strictly four-dimensional, strictly discrete, and strictly quantum in nature.
description: 33 pages, invited contribution to Living Reviews in Relativity; the author welcomes any comments and suggestions
Evaluating the Market Quality of Commercially Stored Linseed Oil
Creators: name: Baumann, Lewis A.
name: Baumann, Lewis A.
Publisher: name: Unknown
Year: 1960
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis

description: Excerpts from the report: During the crop years of 1948 and 1949, and later during 1952, 1953, and 1954; the Commodity Credit Corporation (CCC) acquired large quantities of flaxseed in the operation of the price support program. A large proportion of this was crushed for linseed oil and stored for periods up to 5 years prior to sale. This project is concerned primarily with analysis of data available for the linseed oil acquired by CCC prior to and during the years of 1953 and 1954, with particular attention to deterioration in quality during storage that might influence the market value of the oil. Other objectives include determination of factors that affect the rate of deterioration of quality of oil in storage, and the costs of this decrease in relation to other costs of storage.
Dynamic hierarchies in temporal directed networks
Creators: name: Tatti, Nikolaj
Publisher: name: arXiv
Year: 2019
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: The outcome of interactions in many real-world systems can be often explained by a hierarchy between the participants. Discovering hierarchy from a given directed network can be formulated as follows: partition vertices into levels such that, ideally, there are only forward edges, that is, edges from upper levels to lower levels. In practice, the ideal case is impossible, so instead we minimize some penalty function on the backward edges. One practical option for such a penalty is agony, where the penalty depends on the severity of the violation. In this paper we extend the definition of agony to temporal networks. In this setup we are given a directed network with time stamped edges, and we allow the rank assignment to vary over time. We propose 2 strategies for controlling the variation of individual ranks. In our first variant, we penalize the fluctuation of the rankings over time by adding a penalty directly to the optimization function. In our second variant we allow the rank change at most once. We show that the first variant can be solved exactly in polynomial time while the second variant is NP-hard, and in fact inapproximable. However, we develop an iterative method, where we first fix the change point and optimize the ranks, and then fix the ranks and optimize the change points, and reiterate until convergence. We show empirically that the algorithms are reasonably fast in practice, and that the obtained rankings are sensible.
Four new planets orbiting somewhat metal-enriched stars
Creators: name: Tinney, C. G.
name: Butler, R. Paul
name: Marcy, Geoffrey W.
name: Jones, Hugh R. A.
name: Penny, Alan J.
name: McCarthy, Chris
name: Carter, Brad D.
name: Bond, Jade
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the detection of four new extra-solar planets from the Anglo-Australian Planet Search orbiting the somewhat metal-enriched stars HD73526, HD76700, HD30177 and HD2039. The planetary companion of HD 76700 has a circular orbit with a period of 3.98d. With M sin i=0.197+-0.017 Mjup, or 0.69 times the mass of Saturn, is one of the lowest minimum mass extra-solar planets yet detected. The remaining planets all have elliptical orbits with periods ranging from 190.5d to 4.4yr. All four planets have been found orbiting stars from a sub-sample of twenty metal-enriched and faint (V<9) stars, which was added to the Anglo-Australian Planet Search's magnitude-limited V$
description: 10 pages, 5 figures and 5 tables
Facets of Random Symmetric Edge Polytopes, Degree Sequences, and Clustering
Creators: name: Braun, Benjamin
name: Bruegge, Kaitlin
name: Kahle, Matthew
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Symmetric edge polytopes are lattice polytopes associated with finite simple graphs that are of interest in both theory and applications. We investigate the facet structure of symmetric edge polytopes for various models of random graphs. For an Erdős-Renyi random graph, we identify a threshold probability at which with high probability the symmetric edge polytope shares many facet-supporting hyperplanes with that of a complete graph. We also investigate the relationship between the average local clustering, also known as the Watts-Strogatz clustering coefficient, and the number of facets for graphs with either a fixed number of edges or a fixed degree sequence. We use well-known Markov Chain Monte Carlo sampling methods to generate empirical evidence that for a fixed degree sequence, higher average local clustering in a connected graph corresponds to higher facet numbers in the associated symmetric edge polytope.
Gapless spectrum in a class of S=1 exchange models with long-range interactions
Creators: name: Sacramento, P. D.
name: Vieira, V. R.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We present evidence for the absence of a gap in a class of S=1 antiferromagnetic exchange models. The spin exchange is long-ranged of the type $-(-1)^{i-j}/|i-j|^α$ where $1
description: 19 pages, 13 figures, RevTex, improved version, to appear in Journal of Physics: Condensed Matter
title: Self-Aware Scheduling for Mixed-Criticality Component-Based Systems
Creators: name: Schlatow, Johannes
name: Möstl, Mischa
name: Ernst, Rolf
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2019
Subjects: subject: 620

description: A basic mixed-criticality requirement in real-time systems is temporal isolation, which ensures that applications receive a guaranteed (CPU) service and impose a bounded interference on other applications. Providing operating system support for temporal isolation is often inefficient, in terms of utilisation and achieved latencies, or complex and hard to implement or model correctly. Correct models are, however, a prerequisite when response times are bounded by formal analyses. We provide a novel approach to this challenge by applying self-aware computing methodologies that involve run-time monitoring to detect (and correct) model deviations of a budget-based scheduler.
description: Publications Institute of Computer and Network Engineering
Polymer Stretching by Turbulence
Creators: name: Chertkov, Michael
Publisher: name: arXiv
Year: 1999
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The stretching of a polymer chain by a large scale chaotic flow is considered. The steady state which emerges as a balance of the turbulent stretching and anharmonic resistance of the chain is quantitatively described, i.e. the dependency on the flow parameters (Lyapunov exponent statistics) and the chain characteristics (the number of beads and the inter-bead elastic potential) is made explicit.
description: 4 pages, no figures, Submitted to PRL November 8, 1999; resubmitted February 22, 2000
Phase resetting and intermittent control at critical edge of stability as major mechanisms of fractality in human gait cycle variability
Creators: name: Fu, Chunjiang
name: Suzuki, Yasuyuki
name: Morasso, Pietro
name: Nomura, Taishin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: The fractality of human gait, namely, the long-range correlation that characterizes scale-free fluctuations of gait descriptors, such as the stride intervals during steady-state walking, depends on the well-tuned organization of the sensorimotor controller. Gait fractality is apparent in healthy young adults but tends to disappear in elderly individuals and neurological patients. Therefore, its partial loss may be indicative of pathological conditions. Despite its potential to be used as a dynamical biomarker for fall risk assessment, the mechanistic origin of gait fractality has been investigated by only a few studies, and even less attention has been devoted to the link between gait fractality and gait stability. Here, we propose a novel computational model of gait by addressing the flexibility-stability trade-off first, and then by showing that gait fractality is a natural consequence of the developed control mechanisms, including phase resetting and intermittent control, which supplement instability in a linear feedback controller operated at stability's edge. The results suggest that pathological gait, characterized by joint-rigidity and/or loss of fractality, may be caused by dysfunction in some of these mechanisms.
High Sensitivity ϕ-OTDR over Long Distance with Polarization Multiplexed Codes
Creators: name: Dorize, Christian
name: Awwad, Elie
name: Renaudier, Jérémie
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Newly introduced polarization diversity probing codes are suggested to enhance the sensitivity and bandwidth performance of differential phase-sensitive distributed OTDR systems. This was recently demonstrated by means of short-length specialized fibers with a backscattering induced by equally spaced Fiber Bragg Gratings inserted in the fiber itself. The work summarized in this letter aims to extend the polarization-diversity probing technique to widely spread standard single mode fibers (SSMF) used for telecommunications, by solely exploiting the Rayleigh backscattering. Conditions to achieve perfect phase estimation along such fibers are first detailed. An experimental validation highlights the ability to detect and localize, over 25km of SSMF, multiple low-energy perturbations within a 475Hz-bandwidth.
A new species of Ahaetulla Link, 1807 (Serpentes: Colubridae: Ahaetullinae) from India
Creators: name: V. Deepak
name: Narayanan, Surya
name: Sarkar, Vivek
name: Dutta, Sushil K.
name: Pratyush P. Mohapatra
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Ecology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: A new species of vine snake of the genus Ahaetulla is described from peninsular India. The new taxon is a medium-sized arboreal snake, readily distinguished from all other congeners by morphological and genetic differences. The new species appears to be widely distributed in Eastern Ghats and Central India with the western-most distribution extending into eastern Rajasthan. However, it is relatively rare, with only three specimens being acquired over the past nine years. urn:lsid:zoobank.org:pub:B610BF55-3CEF-4160-9A2C-25A069A82223 urn:lsid:zoobank.org:act:AD84ABAE-F4F5-452C-8EFD-969D191E738B
FTMPST: Fault-Tolerant Multiparty Session Types
Creators: name: Peters, Kirstin
name: Nestmann, Uwe
name: Wagner, Christoph
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Multiparty session types are designed to abstractly capture the structure of communication protocols and verify behavioural properties. One important such property is progress, i.e., the absence of deadlock. Distributed algorithms often resemble multiparty communication protocols. But proving their properties, in particular termination that is closely related to progress, can be elaborate. Since distributed algorithms are often designed to cope with faults, a first step towards using session types to verify distributed algorithms is to integrate fault-tolerance. We extend multiparty session types to cope with system failures such as unreliable communication and process crashes. Moreover, we augment the semantics of processes by failure patterns that can be used to represent system requirements (as, e.g., failure detectors). To illustrate our approach we analyse a variant of the well-known rotating coordinator algorithm by Chandra and Toueg.
CoFHEE: A Co-processor for Fully Homomorphic Encryption Execution (Extended Version)
Creators: name: Nabeel, Mohammed
name: Gamil, Homer
name: Soni, Deepraj
name: Ashraf, Mohammed
name: Gebremichael, Mizan Abraha
name: Chielle, Eduardo
name: Karri, Ramesh
name: Sanduleanu, Mihai
name: Maniatakos, Michail
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: The migration of computation to the cloud has raised concerns regarding the security and privacy of sensitive data, as their need to be decrypted before processing, renders them susceptible to potential breaches. Fully Homomorphic Encryption (FHE) serves as a countermeasure to this issue by enabling computation to be executed directly on encrypted data. Nevertheless, the execution of FHE is orders of magnitude slower compared to unencrypted computation, thereby impeding its practicality and adoption. Therefore, enhancing the performance of FHE is crucial for its implementation in real-world scenarios. In this study, we elaborate on our endeavors to design, implement, fabricate, and post-silicon validate CoFHEE, a co-processor for low-level polynomial operations targeting Fully Homomorphic Encryption execution. With a compact design area of $12mm^2$, CoFHEE features ASIC implementations of fundamental polynomial operations, including polynomial addition and subtraction, Hadamard product, and Number Theoretic Transform, which underlie most higher-level FHE primitives. CoFHEE is capable of natively supporting polynomial degrees of up to $n = 2^{14}$ with a coefficient size of 128 bits, and has been fabricated and silicon-verified using 55nm CMOS technology. To evaluate it, we conduct performance and power experiments on our chip, and compare it to state-of-the-art software implementations and other ASIC designs.
description: 13 pages
title: Capitalism, Science and Technology
Creators: name: Steindl, Josef
Year: 2017
Subjects: subject: Kapitalismus Wirtschaftsentwicklung Technischer Fortschritt Innovation Kriegswirtschaft Industrie Produktivitätsentwicklung Forschung und Entwicklung Wissensproduktion

description: Kopie des Buchbeitrages, handschriftliche Anmerkungen und Anstreichungen nicht vom Verfasser.
description: Kopie - Sonderdruck, 6 Blätter, mit zahlreichen Anstreichungen
Quantifying non-stabilizerness via information scrambling
Creators: name: Ahmadi, Arash
name: Greplova, Eliska
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The advent of quantum technologies brought forward much attention to the theoretical characterization of the computational resources they provide. A method to quantify quantum resources is to use a class of functions called magic monotones and stabilizer entropies, which are, however, notoriously hard and impractical to evaluate for large system sizes. In recent studies, a fundamental connection between information scrambling, the magic monotone mana and 2-Renyi stabilizer entropy was established. This connection simplified magic monotone calculation, but this class of methods still suffers from exponential scaling with respect to the number of qubits. In this work, we establish a way to sample an out-of-time-order correlator that approximates magic monotones and 2-Renyi stabilizer entropy. We numerically show the relation of these sampled correlators to different non-stabilizerness measures for both qubit and qutrit systems and provide an analytical relation to 2-Renyi stabilizer entropy. Furthermore, we put forward and simulate a protocol to measure the monotonic behaviour of magic for the time evolution of local Hamiltonians.
description: 8 pages, 4 figures, code: https://gitlab.com/QMAI/papers/magicinfoscrambling
Strong interband interaction in the excitonic insulator phase of Ta$_2$NiSe$_5$
Creators: name: Lee, Jinwon
name: Kang, Chang-Jong
name: Eom, Man Jin
name: Kim, Jun Sung
name: Min, Byung Il
name: Yeom, Han Woong
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Excitonic insulator (EI) was proposed in 60's as a distinct insulating state originating from pure electronic interaction, but its material realization has been elusive with extremely few material candidates and with only limited evidence such as anomalies in transport properties, band dispersions, or optical transitions. We investigate the real-space electronic states of the low temperature phase in Ta$_2$NiSe$_5$ with an atomic resolution to clearly identify the quasiparticle energy gap together with the strong electron-hole band renormalization using scanning tunneling microscopy (STM) and spectroscopy (STS). These results are in good agreement with the EI transition scenario in Ta$_2$NiSe$_5$. Our spatially-resolved STS data and theoretical calculations reveal further the orbital inversion at band edges, which indicates the exciton condensation close to the Bardeen-Cooper-Schrieffer regime.
Diversity and Uses of Non-Timber Forest Products in Organic Cocoa base Agroforests in the South-east of Côte d'Ivoire
Creators: name: ADOU YAO, C. Y.
name: TOKOU, B. A.
name: VROH, T. B. A.
name: ETTIEN, R.
name: GARNIER, B.
Publisher: name: Zenodo
Year: 2023

description: In Côte d'Ivoire, through Project REDD+, the NGO NITIDÆ has certified organic some agroforestry farms according to a strict base among which the presence of the Non-Timber Forest Products (NTFP). The NTFPs traded in West Africa for several years, mainly come from forests and agroforestry systems. The protection and marketing of these NTFP contribute to the well-being of farming households and the quality of production systems. The diversity of uses of NTFP from plant species associated with organic cocoa trees was assessed. Ethnobotanical surveys were conducted with 50 producers and 75 actors involved in their economic valorization. A total of 48 NTFP species were cited by the local populations. These NTFP were mentioned in different categories of use: food, medicinal, cultural and craft. Bark and fruit are the most commonly used while leaves while buds and roots are the least used. Five (5) NTFP with added value are valued by the population and their sale generates a net annual income of US Dollar 27,358.66. The current study highlighted the diversity and importance of the uses of some NTFP from these cocoa agroforestry systems and play an essential role in the health care and livelihoods of local populations.
Keywords: Agroforests, harvested products, Cocoa Biologic, NTFP.
Trapped surfaces in prolate collapse in the Gibbons-Penrose construction
Creators: name: Pelath, M. A.
name: Tod, K. P.
name: Wald, Robert M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate existence and properties of trapped surfaces in two models of collapsing null dust shells within the Gibbons-Penrose construction. In the first model, the shell is initially a prolate spheroid, and the resulting singularity forms at the ends first (relative to a natural time slicing by flat hyperplanes), in analogy with behavior found in certain prolate collapse examples considered by Shapiro and Teukolsky. We give an explicit example in which trapped surfaces are present on the shell, but none exist prior to the last flat slice, thereby explicitly showing that the absence of trapped surfaces on a particular, natural slicing does not imply an absence of trapped surfaces in the spacetime. We then examine a model considered by Barrabes, Israel and Letelier (BIL) of a cylindrical shell of mass M and length L, with hemispherical endcaps of mass m. We obtain a "phase diagram" for the presence of trapped surfaces on the shell with respect to essential parameters $λ\equiv M/L$ and $μ\equiv m/M$. It is found that no trapped surfaces are present on the shell when $λ$ or $μ$ are sufficiently small. (We are able only to search for trapped surfaces lying on the shell itself.) In the limit $λ\to 0$, the existence or nonexistence of trapped surfaces lying within the shell is seen to be in remarkably good accord with the hoop conjecture.
description: 22 pages, 6 figures
'Escape 2 Educate': a metodologia "Escape Room" no ensino de inglês no 1º CEB
Creators: name: Almeida, João
name: Cruz, Mário
Publisher: name: Sensos-e
Year: 2019

description: Começaram a surgir alguns estudos relacionados com a implementação da metodologia “Escape Room” (Guigon 2018) em contextos de ensino secundário, sendo o seu enfoque a maneira como o uso deste tipo de abordagem pode promover o desenvolvimento das competências do século XXI (Cruz & Orange , 2016), ou seja, o pensamento crítico, a resolução de problemas e a colaboração. No entanto, pouco tem sido investigado sobre os efeitos desta metodologia para alunos do 1º CEB. Este artigo visa apresentar o projeto "Escape 2 Educate" e discutir a implementação da metodologia "Escape Room" em ambientes de aprendizagem de inglês no 1º CEB. No âmbito deste projeto, os alunos foram trancados dentro de uma sala de aula, e para escapar - e, portanto, ganhar o jogo -, tiveram que superar uma série de desafios usando conhecimentos específicos e competências adquiridas nas aulas de inglês. Seguindo uma abordagem metodológica etnográfica, observámos práticas baseadas na metodologia 'Escape Room' com um grupo de alunos que se encontram a frequentar inglês no 2o / 3o anos de escolaridade. Durante estas práticas os alunos foram convidados a responder questionários, decifrar enigmas, escrever mensagens, resolver problemas, analisar vídeos de forma crítica, etc. Os resultados mostram que as tarefas baseadas na metodologia “Escape Room" promovem o comportamento colaborativo entre os alunos, o que, por sua vez, promove a resolução criativa de problemas e o pensamento crítico na sala de aula. De facto, esta metodologia, como uma experiência gamificada que permite que a aprendizagem seja envolvente, significativa e experiencial (Fernández-Corbacho, 2014), pode ser uma maneira muito interessante e divertida de desenvolver competências, não apenas daqueles que aprendem, mas também daqueles que ensinam.
description: Sensos-e, Vol 6 No 2 (2019): INW2019
Electronic Supplementary Information from Insulin-insensitivity of male genitalia maintains reproductive success in Drosophila
Creators: name: Dreyer, Austin P.
name: Shingleton, Alexander W.
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Developmental Biology

description: Supplementary methods, figures and tables
Exact Wirelength of Embedding 3-Ary n-Cubes into certain Cylinders and Trees
Creators: name: S, Rajeshwari
name: Rajesh, M
Publisher: name: arXiv
Year: 2022
Subjects: subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences
subject: 68R01, 68R10

description: Graph embeddings play a significant role in the design and analysis of parallel algorithms. It is a mapping of the topological structure of a guest graph G into a host graph H, which is represented as a one-to-one mapping from the vertex set of the guest graph to the vertex set of the host graph. In multiprocessing systems the interconnection networks enhance the efficient communication between the components in the system. Obtaining minimum wirelength in embedding problems is significant in the designing of network and simulating one architecture by another. In this paper, we determine the wirelength of embedding 3-ary n-cubes into cylinders and certain trees.
description: 13 pages, 5 figures
Error Correction for Discrete Tomography
Creators: name: Ceko, M.
name: Hajdu, L.
name: Tijdeman, R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Discrete tomography focuses on the reconstruction of functions $f: A \to \mathbb{R}$ from their line sums in a finite number $d$ of directions, where $A$ is a finite subset of $\mathbb{Z}^2$. Consequently, the techniques of discrete tomography often find application in areas where only a small number of projections are available. In 1978 M.B. Katz gave a necessary and sufficient condition for the uniqueness of the solution. Since then, several reconstruction methods have been introduced. Recently Pagani and Tijdeman developed a fast method to reconstruct $f$ if it is uniquely determined. Subsequently Ceko, Pagani and Tijdeman extended the method to the reconstruction of a function with the same line sums of $f$ in the general case. Up to here we assumed that the line sums are exact. In this paper we investigate the case where a small number of line sums are incorrect as may happen when discrete tomography is applied for data storage or transmission. We show how less than $d/2$ errors can be corrected and that this bound is the best possible.
description: final version
As tecnologias de apoio ao conhecimento Matemático: uma experiência no 2.º CEB
Creators: name: Figueiredo, António
name: Lima, Cláudia
name: Couto, Ângela
Publisher: name: Sensos-e
Year: 2019

description: A educação matemática atual enfatiza a dinâmica proativa do professor e a participação ativa do aluno nas dinâmicas de sala de aula, num processo em que o professor, sendo um facilitador das aprendizagens, pode apoiar o aluno na construção de representações matemáticas profícuas e profundas, transferindo-lhe gradualmente o controlo da qualidade das suas aprendizagens. Esta perspetiva de trabalho exige, claramente, por parte dos professores, coragem na rutura com as metodologias de ensino tradicionais. Neste estudo, e ao longo de um ano letivo, desenvolveram-se estratégias diversificadas e utilizaram-se recursos tecnológicos variados na abordagem da Geometria a um conjunto de 39 alunos do 5.º ano de escolaridade. Este é um tópico recheado de terminologia específica, de propriedades e relações entre objetos geométricos, de teoremas, numa lógica de matemática pura, que dificulta a sua aprendizagem por parte dos alunos. A referida abordagem permitiu que estes alunos se envolvessem autonomamente nas descobertas, nas aprendizagens e na autoavaliação dos seus conhecimentos. Desta forma, também se potenciou o direito e acesso às mesmas oportunidades de aprendizagem, na verdadeira aceção de escola inclusiva, que respeita as características idiossincráticas de cada um, diminui as desigualdades e dá preferência à compreensão em vez da memorização a curto prazo.
description: Sensos-e, Vol 6 No 2 (2019): INW2019
Friction as a consistent quantum-mechanical concept
Creators: name: Zhdanov, Dmitry V.
name: Bondar, Denys I.
name: Seideman, Tamar
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A quantum analog of friction (understood as a completely positive, Markovian, translation-invariant and phenomenological model of dissipation) is known to be in odds with the detailed balance in the thermodynamic limit. We show that this is not the case for quantum systems with internal (e.g. spin) states non-adiabatically coupled to translational dynamics. For such systems, a quantum master equation is derived which phenomenologically accounts for the frictional effect of a uniform zero temperature environment. A simple analytical example is provided. Conjectures regarding the finite temperature case are also formulated. The results are important for efficient simulations of complex molecular dynamics and quantum reservoir engineering applications.
description: 8 pages, 1 figure
Bridging Causal Reversibility and Time Reversibility: A Stochastic Process Algebraic Approach
Creators: name: Bernardo, Marco
name: Mezzina, Claudio A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Causal reversibility blends reversibility and causality for concurrent systems. It indicates that an action can be undone provided that all of its consequences have been undone already, thus making it possible to bring the system back to a past consistent state. Time reversibility is instead considered in the field of stochastic processes, mostly for efficient analysis purposes. A performance model based on a continuous-time Markov chain is time reversible if its stochastic behavior remains the same when the direction of time is reversed. We bridge these two theories of reversibility by showing the conditions under which causal reversibility and time reversibility are both ensured by construction. This is done in the setting of a stochastic process calculus, which is then equipped with a variant of stochastic bisimilarity accounting for both forward and backward directions.
Differential rotation decay in the radiative envelopes of CP stars
Creators: name: Arlt, Rainer
name: Hollerbach, Rainer
name: Ruediger, Guenther
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Stars of spectral classes A and late B are almost entirely radiative. CP stars are a slowly rotating subgroup of these stars. It is possible that they possessed long-lived accretion disks in their T Tauri phase. Magnetic coupling of disk and star leads to rotational braking at the surface of the star. Microscopic viscosities are extremely small and will not be able to reduce the rotation rate of the core of the star. We investigate the question whether magneto-rotational instability can provide turbulent angular momentum transport. We illuminate the question whether or not differential rotation is present in CP stars. Numerical MHD simulations of thick stellar shells are performed. An initial differential rotation law is subject to the influence of a magnetic field. The configuration gives indeed rise to magneto-rotational instability. The emerging flows and magnetic fields transport efficiently angular momentum outwards. Weak dependence on the magnetic Prandtl number (~0.01 in stars) is found from the simulations. Since the estimated time-scale of decay of differential rotation is 10^7-10^8 yr and comparable to the life-time of A stars, we find the braking of the core to be an ongoing process in many CP stars. The evolution of the surface rotation of CP stars with age will be an observational challenge and of much value for verifying the simulations.
description: 8 pages, 11 figures; submitted to Astron. & Astrophys
Combinatorial games on Galton-Watson trees involving several-generation-jump moves
Creators: name: Podder, Moumanti
name: Bhasin, Dhruv
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We study the $k$-jump normal and $k$-jump misère games on rooted Galton-Watson trees, expressing the probabilities of various outcomes of these games as specific fixed points of certain functions that depend on $k$ and the offspring distribution. We discuss results on phase transitions pertaining to draw probabilities when the offspring distribution is Poisson$(λ)$ (i.e. for which values of $λ$, the draw probability is strictly positive). We compare the probabilities of the various outcomes of the $2$-jump normal game with those of the $2$-jump misère game, and a similar comparison is drawn between the $2$-jump normal game and the $1$-jump normal game, under the Poisson regime. We describe the rate of decay of the probability that the first player loses the $2$-jump normal game as $λ\rightarrow \infty$. Finally, we discuss a sufficient condition for the average duration of the $k$-jump normal game to be finite.
description: Substantial improvements to the presentation of the entire paper, including more detailed explanations in all sections, providing outlines for how we plan to execute the proofs etc. have been incorporated. The main body of the paper is 32 pages, and the appendix is 16 pages
Contextualização de problemas de matemática suporte para uma aprendizagem com significado
Creators: name: Marques, Sara
name: Couto, Ângela
name: Lima, Cláudia
Publisher: name: Sensos-e
Year: 2019

description: A excessiva mecanização do ensino da matemática em Portugal é, segundo vários estudos, a principal causa para esta disciplina ser considerada abstrata, complexa, desconectada da realidade e desinteressante para muitos alunos. Assim, “para que serve a matemática?” é uma pergunta que paira no pensamento do aluno que não vislumbra a sua aplicabilidade no quotidiano. Urge promover aprendizagens contextualizadas, próximas da cultura do aluno, colocando-o como agente ativo no processo de construção dos seus saberes. Desta premissa surgiu este estudo realizado com 15 alunos do 3.º ano de escolaridade, através do qual se procurou desenvolver a competência na resolução de problemas vivencialmente contextualizados. O objetivo do estudo foi o de perceber se a contextualização dos problemas, resolvidos através do método de Polya, teria potencial para motivar e envolver os alunos nessas competências, que são fundamentais para a matemática enquanto disciplina e para as vivências diárias. O estudo evidenciou que a resolução de problemas contextualizados possibilita um desenvolvimento cognitivo relacional mais significativo. Os problemas, contextualizados com situações próximas da realidade dos alunos, alteraram a sua postura e melhoraram o desempenho, mostrando maior predisposição para a matemática. A motivação, o gosto e a confiança, revelaram-se fulcrais no entendimento de uma matemática relacional em detrimento da procedimental.
description: Sensos-e, Vol 6 No 2 (2019): INW2019
Hyaluronan concentration and molecular mass in psoriatic arthritis: biomarkers of disease severity, resistance to treatment, and outcome
Creators: name: U Hellman
name: A Engström-Laurent
name: A Larsson
name: U Lindqvist
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer

description: Objective: Low molecular mass hyaluronan causes inflammatory processes and can act as a pro-inflammatory cytokine in skin and other sites of activity in psoriatic arthritis (PsA). This study investigated whether the molecular mass distribution of hyaluronan (HA) in skin and the quantity of circulating HA are related to the clinical inflammatory picture in PsA with active disease and to the effect of treatment with anti-tumour necrosis factor-α (anti-TNF-α) adalimumab. Methods: Twenty patients with TNF-α-naïve active polyarticular PsA were included in this prospective clinical trial of treatment with 40 mg s.c. adalimumab according to standard procedure. Clinical activity, patients’ assessments, and skin biopsies were captured at inclusion and at the 12 week follow-up. Ten healthy individuals were recruited for comparison of HA analyses. Histochemistry of skin inflammation, serum HA, and molecular mass of HA were determined. Results: Overall improvements in clinical parameters were observed. Eight of 18 patients reached minimum disease activity after 12 weeks and disease activity was significantly reduced (p Conclusion: HA concentration and mass seem to be two possible factors in the inflammatory pathology of PsA acting as biomarkers for disease severity, resistance to treatment, and worse outcome.
title: AADA Archaeological Data Query and Map Visualisations in R
title: Supplement material to Archaeological Artefact Database if Finland, Pesonen et al. submitted Dec 2023
titleType: Subtitle
Creators: name: Roose, Meeli
Publisher: name: Zenodo
Year: 2024

description: This document is part of the original published article: Pesonen, P., Moilanen, U., Roose, M. et al. Archaeological Artefact Database of Finland (AADA). Sci Data 11, 815 (2024). https://doi.org/10.1038/s41597-024-03602-8

This markdown document presents the supplementary code (.rmd) used for repeating the steps involved in generating the archaeological data queries and map visualisations of Finland presented in the article by Pesonen et al submitted in Dec 2023.

The original citation for manuscript describing the dataset: Petro Pesonen, Ulla Moilanen, Meeli Roose, Jarkko Saipio, Jasse Tiilikkala, Muhammad Usman Sanwal, Visa Immonen, Outi Vesakoski & Päivi Onkamo (submitted manuscript): Archaeological Artefact Database of Finland (AADA).

The citation to refer to this workflow and mapping: Roose, M. (2024). AADA Archaeological Data Query and Map Visualisations in R (1.0). Zenodo. https://doi.org/10.5281/zenodo.10527320

The code also loads reference data for setting the map background (core map). To use the code, the datasets in XLSXformat must be in the working directory.

The AADA data (XLSX and CSV files) in its current form is available in Zenodo https://zenodo.org/records/10437704
title: AADA Archaeological Data Query and Map Visualisations in R
title: Supplement material to Archaeological Artefact Database if Finland, Pesonen et al. submitted Dec 2023
titleType: Subtitle
Creators: name: Roose, Meeli
Publisher: name: Zenodo
Year: 2024

description: Document .pdf and Rmd are in review. Not published.

This markdown document presents the supplementary code (.rmd) used for repeating the steps involved in generating the archaeological data queries and map visualisations of Finland presented in the article by Pesonen et al submitted in Dec 2023.

The original citation for manuscript describing the dataset: Petro Pesonen, Ulla Moilanen, Meeli Roose, Jarkko Saipio, Jasse Tiilikkala, Muhammad Usman Sanwal, Visa Immonen, Outi Vesakoski & Päivi Onkamo (submitted manuscript): Archaeological Artefact Database of Finland (AADA).

The citation to refer this workflow and mapping: Roose, M. (2024). AADA Archaeological Data Query and Map Visualisations in R (1.0). Zenodo. https://doi.org/10.5281/zenodo.10527320

The code also loads reference data for setting the map background (core map). To use the code, the datasets in XLSXformat must be in the working directory.

The AADA data (XLSX and CSV files) in its current form is available in Zenodo https://zenodo.org/records/10437704
Marketing Milk in Alaska
Creators: name: Klein, Jack E.
name: Klein, Jack E.
Publisher: name: Unknown
Year: 1960
Subjects: subject: Demand and Price Analysis
subject: Food Consumption/Nutrition/Food Safety
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: Excerpt from the report Introduction: Alaskans can choose among a variety of dairy products offered to satisfy their milk requirements. These products range from fresh bottled milk to manufactured and highly concentrated products, and they are supplied from both local sources and sources distant from Alaska. This report provides information about the market for milk in the six largest of Alaska's cities and in the military establishments. The cities are Ketchikan, Sitka, Kodiak, Juneau, Anchorage, and Fairbanks. The report describes the marketing channels followed by the more important dairy products, provides estimates of their sales volume, measures the costs and prices at different market levels, and describes the competitive environment in which dairy products used for fluid purposes are sold.
Developing student-made artifacts on nanotechnology issues in a context of interacting formal and informal learning settings
Creators: name: MICHAILIDI, EMILY
Publisher: name: Mediterranean Journal of Education
Year: 2021
Subjects: Student artifacts, nanotechnology, science communication, combination of formal-informal education

description: This paper examines student-curated artifacts that were developed in the context of a teaching module on nanotechnology applications that combined formal and informal learning experiences. Deriving from the fact that the negotiation of modern scientific objects constitutes a suitable field for the harmonious connection between formal and informal education, the present study aims to delve into students' understanding of nanotechnology concepts, as reflected in student-curated artifacts. Fifteen teachers and 298 students took part in the study developing a total of 19 artifacts on nanotechnology issues and their societal implications. The results show that such a partnership can help students acquire, depending on their level and cognitive background, basic knowledge on key nanotechnology concepts and to communicate it using multiple activities of graded cognitive demands.
description: Mediterranean Journal of Education, Vol. 1, N. 1 (2021)
A coherent differential PCF
Creators: name: Ehrhard, Thomas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: The categorical models of the differential lambda-calculus are additive categories because of the Leibniz rule which requires the summation of two expressions. This means that, as far as the differential lambda-calculus and differential linear logic are concerned, these models feature finite non-determinism and indeed these languages are essentially non-deterministic. In a previous paper we introduced a categorical framework for differentiation which does not require additivity and is compatible with deterministic models such as coherence spaces and probabilistic models such as probabilistic coherence spaces. Based on this semantics we develop a syntax of a deterministic version of the differential lambda-calculus. One nice feature of this new approach to differentiation is that it is compatible with general fixpoints of terms, so our language is actually a differential extension of PCF for which we provide a fully deterministic operational semantics.
Haldane gap in a S=1 exchange model with long-range interactions
Creators: name: Sacramento, P. D.
name: Vieira, V. R.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The ground-state properties of the S=1 Haldane-Shastry model are studied using a modified Lanczos algorithm and diagonalizing exactly small chains. We find evidence that, as for the antiferromagnetic Heisenberg model, the spectrum shows a gap, in contrast to the S=1/2 case. The correlation functions decay exponentially for large m. We find that the correlation functions for the Haldane-Shastry model decay faster than for the Heisenberg model. We estimate the infinite system limit for the ground-state energy, value of the gap and correlation functions.
description: Latex, 18 pages plus 7 figures (postscript)