cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25549/impa-m76759
title: Missionnaries of the Basel mission in Founban, Cameroon

description: Portrait of the missionaries of the Basel mission who work in Foumban: Goldkuste, Kirchnet, Dr Mûllet, Kühnle, Boget, Geprags, Gohring, Leverng, Billmann, Hohnet, Spellenberg, Vichauer.
DOI: 10.25549/impa-m76850
title: Courtyard in Bamum, Cameroon

description: View of a courtyard surrounded by houses, in Bamum.
DOI: 10.25549/impa-m77896
title: Workshop in Baraka, Gabon

description: Pupil of the school of the Société des missions évangéliques de Paris (Paris evangelical missionary society), working in the workshop of Baraka, in Libreville, Gabon.
DOI: 10.25549/impa-m76749
title: Missionary house, in Cameroon

description: View of a house in a mission station of the Société des missions évangéliques de Paris (Paris evangelical missionary society) in Cameroon. A woman seats on the balcony.
DOI: 10.25549/impa-m77888
title: Mission house of Baraka, in Gabon

description: View of the mission house of the Société des missions évangéliques de Paris (Paris evangelical missionary society) in Baraka, Libreville, in Gabon.
DOI: 10.25549/impa-m77885
title: Path to the church of Baraka, in Gabon

description: African christian people going back home from the church of the Société des missions évangéliques de Paris (Paris evangelical missionary society) in Baraka, Libreville, in Gabon, the day of Christmas.
DOI: 10.25549/impa-m77839
title: Reverend Ombagho, in Gabon

description: Portrait of Felix Ombagho, evangelist then pastor for the Société des missions évangéliques de Paris (Paris evangelical missionary society) in Gabon.
DOI: 10.25549/impa-m76765
title: Bamum art, in Cameroon

description: Two Bamum posts where human figures and animals are sculpted.; Photograph published in the Journal des Missions Evangéliques, November-December 1960.
DOI: 10.25549/impa-m76775
title: Bamum art, in Cameroon

description: Wooden sculpture representing a human head, with a snake on the top.
DOI: 10.25549/impa-m76712
title: Sunset in Cameroon

description: View of a sunset in the Bamum region. The photograph was taken from Foumban.
DOI: 10.25549/impa-m76714
title: The river Noun, in Cameroon

description: View of the river Noun which separates the Bamum region from the Bamileke region in Cameroon.
DOI: 10.25549/impa-m77844
title: [African boy holding an european baby, in Gabon]

description: African boy holding the baby of a missionary of the Société des missions évangéliques de Paris (Paris evangelical missionary society) in Gabon.
DOI: 10.25549/impa-m76860
title: Palace of Foumban, in Cameroon

description: View of the balcony of the palace of the Bamum king in Foumban.
DOI: 10.25549/impa-m76716
title: The river Noun, in Cameroon

description: View of the river Noun which separates the Bamum region from the Bamileke region in Cameroon.
DOI: 10.25549/impa-m76715
title: Landscape in the Bamum region, Cameroon

description: View of the river Noun and the mountains of the Bamum region, from the cliff of Bafoussam.
DOI: 10.25549/impa-m76706
title: Door of Foumban, in Cameroon

description: View of the gate to Foumban, near the market.
DOI: 10.25549/impa-m76707
title: Market of Foumban, in Cameroon

description: Women selling goods in the Bamum market of Foumban.
DOI: 10.25549/impa-m76840
title: Foumban, in Cameroon

description: View of the gate to Foumban.
DOI: 10.25549/impa-m76713
title: Sunset in Cameroon

description: Sunset in the Bamum region. The photograph was taken from Foumban.
DOI: 10.25549/impa-m76748
title: Church of Foumban, in Cameroon

description: People going out from the church of Foumban after the service organized for its dedication.
DOI: 10.25549/impa-m76838
title: King Njoya in front of the reception hall in Foumban, Cameroon

description: The Bamum king Njoya in front of his palace. The Palace is decorated with sculpted posts.
DOI: 10.25549/impa-m77835
title: Mission house in Cap Lopez, Gabon

description: Missionaries in the mission house of the Société des missions évangéliques de Paris (Paris evangelical missionary society) in Cap Lopez, Gabon.
DOI: 10.25549/impa-m76776
title: Palace of the sultan of Foumban, in Cameroon

description: View of the palace of the Sultan of Foumban.
DOI: 10.25549/impa-m76893
title: King Njoya, in Cameroon

description: Painted portrait in profile of the Bamum king Njoya.
DOI: 10.25549/impa-m76895
title: Old Bamum palace, in Cameroon

description: Painting of the old Bamum palace in Foumban. It was destroyed.
DOI: 10.25549/impa-m76894
title: King Njoya, in Cameroon

description: Painting of Bamum king Njoya sitting in front of his palace in Foumban.
DOI: 10.25549/impa-m76876
title: King Njoya, in Cameroon

description: Full-length portrait of the Bamum king Njoya, in Foumban.
DOI: 10.25549/impa-m76862
title: Foreign dancers with masks in Foumban, in Cameroon

description: Bamessi dancers at the funeral of Nzapadunke, mother of Bamum king Njoya. She died in Foumban, the 2nd of July 1913.
DOI: 10.25549/impa-m76782
title: Craftsman, in Cameroon

description: Bamum craftsman embroidering some fabrics.
DOI: 10.25549/impa-m76851
title: Bamum women, in Cameroon

description: Two Bamum women sitting on chairs, with four people behind them.
DOI: 10.25549/impa-m76753
title: Sacred stones in Cameroon

description: Bamum sacred stones in Foumban.
DOI: 10.25549/impa-m77874
title: Evangelist in Gabon

description: Portrait of an african evangelist of the Société des missions évangéliques de Paris (Paris evangelical missionary society) in Gabon.
DOI: 10.25549/impa-m76864
title: Bamum door, in Cameroon

description: Sculpted door, decorated with geometrical drawings, human figures and animals.; On the back of the photograph, someone wrote "Kunsvolle eigenborenenarbeit am stadtdor von Bamum ex. Kamerun von Willhem Kemmer Freitheits-verlag, Berlin, 1937, p.265". Photograph published in the Bulletin of the Basel mission, n°988
DOI: 10.25549/impa-m76881
title: Wives of the Bamum king, in Cameroon

description: Full-length portrait of two wives of the Bamum king Njoya.
DOI: 10.25549/impa-m77889
title: Mission house II, in Baraka, Gabon

description: Two children of missionaries of the Société des missions évangéliques de Paris (Paris evangelical missionary society) in front of the second mission house of Baraka, in Libreville, Gabon.
DOI: 10.25549/impa-m76858
title: Church in Bamendshing, Cameroon

description: Church of Bamendshing, built with a traditional architecture of the Grassfields.
DOI: 10.25549/impa-m76889
title: [no title provided]

description: View of the palace of the Bamum king of Foumban.
DOI: 10.25549/impa-m77890
title: Mission station of Baraka, in Gabon

description: Mission house and church in Baraka, mission station of the Société des missions évangéliques de Paris (Paris evangelical missionary society) in Libreville, Gabon. Children walk on the path in the foreground.
DOI: 10.25549/impa-m77850
title: Girl in Gabon

description: Portrait of a young african girl, in Gabon.
DOI: 10.25549/impa-m77906
title: People, in Gabon

description: Gabonese people sitting in front of a hut in Lambarene, Gabon.
DOI: 10.6084/m9.figshare.14326639
title: The statistical physics of turbulence

description: We give a broad overview of the statistical theory of turbulence, carefully basing it on important and consolidated notions of fluid dynamics, before going deeper into the discussion of specific models, prone to contemporary debates. In the so-called structural approach, the complexity of turbulence is perceived as the challenge to understand, from the point of view of vortex tubes dynamics, energy transport from large to small scales in the vanishing viscosity limit. The statistical properties of the energy cascade, such as the intermittency phenomenon, are modelled through seemingly diverse narratives associated to multiplicative stochastic processes or, alternatively, to the multifractal formulation of the singularity spectrum of the turbulent velocity field. The synthesis, the foundation from first principles and the integration of these two modelling strategies with the structural approach build up the essence of current theoretical challenges in turbulence.
DOI: 10.6084/m9.figshare.14326640
title: Statistical Mechanics for Complex Systems

description: The magnificent Boltzmann-Gibbs statistical mechanics, amalgam of first principles and theory of probabilities, constitutes one of the pillars of contemporary theoretical physics. However, it does not apply to a wide number of the so called complex systems, characterized essentially by a strong space-time entanglement of its elements. We tutorially review here the proposal for its generalization, referred to as nonextensive statistical mechanics, which emerged in 1988. It is based on nonadditive entropies (with index q ≠ 1), in contrast with the Boltzmann-Gibbs-von Neumann-Shannon entropy, which is additive (with index q = 1). Its basic foundations, as well as selected applications in physics and elsewhere, are briefly described.
DOI: 10.6084/m9.figshare.14326640.v1
title: Statistical Mechanics for Complex Systems

description: The magnificent Boltzmann-Gibbs statistical mechanics, amalgam of first principles and theory of probabilities, constitutes one of the pillars of contemporary theoretical physics. However, it does not apply to a wide number of the so called complex systems, characterized essentially by a strong space-time entanglement of its elements. We tutorially review here the proposal for its generalization, referred to as nonextensive statistical mechanics, which emerged in 1988. It is based on nonadditive entropies (with index q ≠ 1), in contrast with the Boltzmann-Gibbs-von Neumann-Shannon entropy, which is additive (with index q = 1). Its basic foundations, as well as selected applications in physics and elsewhere, are briefly described.
DOI: 10.6084/m9.figshare.14326655
title: Stochastic phenomena in single cell migration: theory, experiments, and simulations

description: Cell migration plays important roles in the development of multicellular organisms and processes as immune response and in cancer metastasis. We present here a review on cell migration modelling of single cells on a flat substrate. Re-analyses of experimental data evinced a behavior that deviates from the canonical Langevin model of a particle immersed on a viscous fluid that presents a Brownian persistent motion. The proposition of a semi-empirical model yields a diffusive behavior in short-time intervals and fits the experimental data, but challenges velocity definition and the corresponding measurement protocol. The solution is presented on the form of an anisotropic model for cell migration, that considers an additional, internal variable, that accounts for the spatial symmetry break of a migrating cell. The theoretical results yield the proposition of natural units for the problem that allows the collapse of theoretical and experimental curves onto a single parameter family of curves. We also discuss a simulation model for three dimensional cells migrating on a flat substrate. The simulation results are quantitatively validated using the theoretical results. The simulation model is now ready to be used in investigating cell migration in more complex environments, that imply non-linear interactions and require numerical solutions.
DOI: 10.6084/m9.figshare.14326655.v1
title: Stochastic phenomena in single cell migration: theory, experiments, and simulations

description: Cell migration plays important roles in the development of multicellular organisms and processes as immune response and in cancer metastasis. We present here a review on cell migration modelling of single cells on a flat substrate. Re-analyses of experimental data evinced a behavior that deviates from the canonical Langevin model of a particle immersed on a viscous fluid that presents a Brownian persistent motion. The proposition of a semi-empirical model yields a diffusive behavior in short-time intervals and fits the experimental data, but challenges velocity definition and the corresponding measurement protocol. The solution is presented on the form of an anisotropic model for cell migration, that considers an additional, internal variable, that accounts for the spatial symmetry break of a migrating cell. The theoretical results yield the proposition of natural units for the problem that allows the collapse of theoretical and experimental curves onto a single parameter family of curves. We also discuss a simulation model for three dimensional cells migrating on a flat substrate. The simulation results are quantitatively validated using the theoretical results. The simulation model is now ready to be used in investigating cell migration in more complex environments, that imply non-linear interactions and require numerical solutions.
DOI: 10.6084/m9.figshare.14326666
title: Answering intriguing and complex questions to people curious and interested in learning physics: the site “Ask CREF”

description: The article celebrates the ten years of the question-and-answer website developed at the Reference Center for Teaching Physics (CREF) of the Federal University of Rio Grande do Sul. These are questions and doubts, most intriguing and some of a complex nature, whose answers are hardly found in the physics literature. The description, evolution, scope and impact of the site with the Portuguese-speaking community of teachers and students are discussed. Also presented are the ten most accessed questions on the site and, as examples, six complete posts.
DOI: 10.6084/m9.figshare.14326666.v1
title: Answering intriguing and complex questions to people curious and interested in learning physics: the site “Ask CREF”

description: The article celebrates the ten years of the question-and-answer website developed at the Reference Center for Teaching Physics (CREF) of the Federal University of Rio Grande do Sul. These are questions and doubts, most intriguing and some of a complex nature, whose answers are hardly found in the physics literature. The description, evolution, scope and impact of the site with the Portuguese-speaking community of teachers and students are discussed. Also presented are the ten most accessed questions on the site and, as examples, six complete posts.
DOI: 10.6084/m9.figshare.14326667.v1
title: Neuroscience and Physics Teaching: limits and possibilities in an unexplored field

description: A few decades ago, a new field of research emerged at the interface between Neuroscience and Education. The central motivation of this research area is the study of the neural mechanisms that support learning, seeking to understand in a more complex way how the process of knowledge acquisition and its use occurs. It is also expected that possible findings from these studies will contribute to an improvement in the quality of the teaching process. Several discoveries made in those years changed old conceptions about various cognitive processes involved in the construction of physical thinking. However, these results are practically unknown in the area of Physics Education. Thus, the aim of this article is to present researches that reveal the limits and possibilities of the use of Neuroscience in investigations aimed at learning Physics.
DOI: 10.6084/m9.figshare.14326667
title: Neuroscience and Physics Teaching: limits and possibilities in an unexplored field

description: A few decades ago, a new field of research emerged at the interface between Neuroscience and Education. The central motivation of this research area is the study of the neural mechanisms that support learning, seeking to understand in a more complex way how the process of knowledge acquisition and its use occurs. It is also expected that possible findings from these studies will contribute to an improvement in the quality of the teaching process. Several discoveries made in those years changed old conceptions about various cognitive processes involved in the construction of physical thinking. However, these results are practically unknown in the area of Physics Education. Thus, the aim of this article is to present researches that reveal the limits and possibilities of the use of Neuroscience in investigations aimed at learning Physics.
DOI: 10.6084/m9.figshare.14326670.v1
title: Bosons vs. Fermions – A computational complexity perspective

description: Recent years have seen a flurry of activity in the fields of quantum computing and quantum complexity theory, which aim to understand the computational capabilities of quantum systems by applying the toolbox of computational complexity theory. This paper explores the conceptually rich and technologically useful connection between the dynamics of free quantum particles and complexity theory. I review results on the computational power of two simple quantum systems, built out of noninteracting bosons (linear optics) or noninteracting fermions. These rudimentary quantum computers display radically different capabilities—while free fermions are easy to simulate on a classical computer, and therefore devoid of nontrivial computational power, a free-boson computer can perform tasks expected to be classically intractable. To build the argument for these results, I introduce concepts from computational complexity theory. I describe some complexity classes, starting with P and NP and building up to the less common #P and polynomial hierarchy, and the relations between them. I identify how probabilities in free-bosonic and free-fermionic systems fit within this classification, which then underpins their difference in computational power. This paper is aimed at graduate or advanced undergraduate students with a Physics background, hopefully serving as a soft introduction to this exciting and highly evolving field.
DOI: 10.6084/m9.figshare.14326670
title: Bosons vs. Fermions – A computational complexity perspective

description: Recent years have seen a flurry of activity in the fields of quantum computing and quantum complexity theory, which aim to understand the computational capabilities of quantum systems by applying the toolbox of computational complexity theory. This paper explores the conceptually rich and technologically useful connection between the dynamics of free quantum particles and complexity theory. I review results on the computational power of two simple quantum systems, built out of noninteracting bosons (linear optics) or noninteracting fermions. These rudimentary quantum computers display radically different capabilities—while free fermions are easy to simulate on a classical computer, and therefore devoid of nontrivial computational power, a free-boson computer can perform tasks expected to be classically intractable. To build the argument for these results, I introduce concepts from computational complexity theory. I describe some complexity classes, starting with P and NP and building up to the less common #P and polynomial hierarchy, and the relations between them. I identify how probabilities in free-bosonic and free-fermionic systems fit within this classification, which then underpins their difference in computational power. This paper is aimed at graduate or advanced undergraduate students with a Physics background, hopefully serving as a soft introduction to this exciting and highly evolving field.
DOI: 10.6084/m9.figshare.14326673.v1
title: On Complexity and the Prospects for Scientific Advancement

description: With the onset of areas such as complex systems, network science, and artificial intelligence, efforts have been invested in modeling science itself. In the present work, we report a related approach to modeling the influence of the complexity of knowledge on the respective prospects for scientific advancement. More specifically, we focus on the question of how much the topological complexity of the knowledge network can influence the prospects for scientific advancement. Once the knowledge has been represented as a complex network, we consider one of its subnetworks, the nucleus, as representing the currently known portion of that network. The relative number of nodes adjacent to the nucleus, and the ratio between this quantity and the quantity of edges interconnecting the nucleus with the remainder of the network, are taken as quantifications of the potential for scientific advancement and the efficiency with which these advances can take place. Subsequent nucleus sizes are considered in both a simpler network (Erdos-Renyi) and a more complex model (Barabasi-Albert). The results surprisingly tended to vary little between these two models, suggesting that the complexity of the knowledge network may have little effect on the prospects for scientific advancement as modeled in the present approach.
DOI: 10.6084/m9.figshare.14326673
title: On Complexity and the Prospects for Scientific Advancement

description: With the onset of areas such as complex systems, network science, and artificial intelligence, efforts have been invested in modeling science itself. In the present work, we report a related approach to modeling the influence of the complexity of knowledge on the respective prospects for scientific advancement. More specifically, we focus on the question of how much the topological complexity of the knowledge network can influence the prospects for scientific advancement. Once the knowledge has been represented as a complex network, we consider one of its subnetworks, the nucleus, as representing the currently known portion of that network. The relative number of nodes adjacent to the nucleus, and the ratio between this quantity and the quantity of edges interconnecting the nucleus with the remainder of the network, are taken as quantifications of the potential for scientific advancement and the efficiency with which these advances can take place. Subsequent nucleus sizes are considered in both a simpler network (Erdos-Renyi) and a more complex model (Barabasi-Albert). The results surprisingly tended to vary little between these two models, suggesting that the complexity of the knowledge network may have little effect on the prospects for scientific advancement as modeled in the present approach.
DOI: 10.6084/m9.figshare.7510940
title: The Strategist of Micro, Small and Medium Brazilian Private Company

description: ABSTRACT The importance of micro, small and medium size companies (MSMC) to the economical development and job creation in the country hasn’t found parallel with respect to the production of theories in the strategy field, even considering the limited capacity of action of the MSMCs and the idiosyncrasies of their leaders. This article seeks to contribute to the understanding of the strategy formation processes in these companies by the nature of the strategic thinking of their strategists, having as reference the taxonomy of generic strategies and the cognitive processes of decision making and strategic thinking. It aims at proposing a typology to comprehend the nature of strategic thinking of these managers, identifying their main characteristics dimensions and proposing an instrument that allows its categorization and comparison. The application of a survey with an intentional sample composed by 70 strategists allowed the use of factor analysis for the construction of categories and scale, and the observation that, in the universe of the surveyed strategists in regard to their way of thinking, intuition is complementary, not dominant, the collective character is intense in the strategy formation process as well as the appreciation of formalism and belief of the importance of planning and registering their intentions.