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Search Results: 1 - 10 of 692 matches for " Schilling-Vacaflor "
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Indigenous identities and politico-juridical demands of CSUTCB and CONAMAQ in the constitutional change process of Bolivia
Schilling-Vacaflor,Almut; Shields,Sara;
T'inkazos , 2008,
Abstract: this article has the aim of improving the understanding about indigenous identities and their interrelations with current politico-juridical demands of indigenous organizations. proposals of structural transformations of the bolivian state, which have been constructed, approved and defended by indigenous and rural sectors of society during the constitutional change process, will be examined.
Argentinian Yungas Forest Fragmentation: Effects on Aboveground Biomass, Microclimate and Carbon Storage  [PDF]
Silvina Manrique, Perla Vacaflor, Norma Cruz
Open Journal of Forestry (OJF) , 2018, DOI: 10.4236/ojf.2018.81009
Abstract: The Argentinian Yungas ecosystem, the more extensive of the two richest biodiversity ecoregions of the country, is subject to rapid deforestation and fragmentation. Because these fragments are the future biodiversity reserves of this ecosystem, it was interesting to know if they constitute small-scale replicas of the forest from which they were detached. Our objective was to characterise the fragments and compare them with sectors of continuous forest by studying the aboveground tree biomass (for the five most representative forest species), microclimate (three variables) and edaphic factors (three) as a function of distance from forest edge at 15, 25, 50, 100 and 200 meters. We selected two size categories for fragments: 5 - 10 ha and 100 - 150 ha, located in the lower Yungas forest (LYF). We did sampling during the dry and wet seasons. As a result, in the larger fragments, the distance exerts a significant effect on the records of the microclimate and edaphic variables, gradually modifying them from the edge to the interior (up to at least 100 meters). The variations are more evident in the wet season. Solar radiation and relative humidity were two of the factors with greater response (Spearman r= -0.89; p < 0.001 and r = 0.58; p < 0.001, in the dry season, respectively). The microclimate of small fragments does not depend on the edge distance, but it is actually sunnier, drier and hotter than that of the forest. The soil has also lost organic carbon and humidity. These changes are accompanied by a lower AGB in the fragments with respect to the forest (6% and 60% of 162 ± 26.02 t·ha-1, for small and big fragments, respectively). The five species studied show less density and trees of reduced dimensions (lower dbh and height). Fast-growing pioneer plant species and disturbance-loving lianas accompany them. Edge plant composition presents notorious changes in the bigger fragments. Biomass and ecosystem processes such as carbon cycling, which have been modified into fragments, both are directly associated with the structure and functioning in LYF remnants. The human and animal intervention detected in the area could be interacting synergistically with the microclimate and biological changes observed and potentiate the effects of degradation in the fragments, creating conditions of greater threat to LYF’s biodiversity. However, the management of the LYF ecosystem within an adequate land use scheme could
The Precise Determination of Mass through the Oscillations of a Very High-Q Electromechanical System  [PDF]
Osvaldo F. Schilling
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2013, DOI: 10.4236/jemaa.2013.53015

The present paper is based upon the fact that if an object is part of a highly stable oscillating system, it is possible to obtain an extremely precise measure for its mass in terms of the energy trapped in the system, rather than through a ratio between force and acceleration, provided such trapped energy can be properly measured. The subject is timely since there is great interest in Metrology on the establishment of a new electronic standard for the kilogram. Our contribution to such effort includes both the proposal of an alternative definition for mass, as well as the description of a realistic experimental system in which this new definition might actually be applied. The setup consists of an oscillating type-II superconducting loop subjected to the gravity and magnetic fields. The system is shown to be able to reach a dynamic equilibrium by trapping energy up to the point it levitates against the surrounding magnetic and gravitational fields, behaving as an extremely high-Q spring-load system. The proposed energy-mass equation applied to the electromechanical oscillating system eventually produces a new experimental relation between mass and the Planck constant.

A Phenomenological Model for the Electromagnetic Origin of Mass in Particles, and Its Quantitative Application to the Electron, the Muon, the Proton, and the Neutron  [PDF]
Osvaldo F. Schilling
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.49161

A simple phenomenological model is developed, which indicates the existence of a direct link between the concept of rest mass of a particle and magnetodynamic energies associated to the formation of the particle. The model is based upon the principles of quantization and conservation of flux, well known for their application in superconductivity. The charge of particles is considered as forming vortices of superconducting currents, which we postulate are created by electromagnetic fluctuations from vacuum (or related processes). A new quantization rule gathers the size, the magnetic moment, and the rest mass of the particle and associates these quantities to the integer number of flux quanta that should be stored in the vortices corresponding to each particle. The model is applied to the electron, the muon, the proton, and the neutron. Quantitative consistency with available experimental data for these subatomic particles is obtained.

Influence of Random Pinning on the Crystallization Process in Suspensions of Hard Spheres  [PDF]
Sven Dorosz, Tanja Schilling
Journal of Crystallization Process and Technology (JCPT) , 2014, DOI: 10.4236/jcpt.2014.42012
Abstract: We discuss crystal formation in supersaturated suspensions of monodisperse hard spheres with a concentration of hard spheres randomly pinned in space and time. The pinning procedure introduces an external length scale and an external time scale that restrict the accessible number of configureurations and ultimately the number of pathways leading to crystallization. We observe a significant drop in the nucleation rate density at a characteristic pinning concentration that can be directly related to the structure of the critical nucleus and the dynamics of its formation in the unpinned system.
Number-parity effect for confined fermions in one dimension
Christian Schilling,Rolf Schilling
Physics , 2015,
Abstract: For $N$ spin-polarized fermions in a $1$-dimensional trap with strong attractive interactions an odd-even effect is found. The entanglement spectrum of the $1$-particle reduced density matrix of the system's ground state differs qualitatively for $N$ odd and $N$ even. Since this effect does not occur for bosons it is the result of the competition between the attractive interaction and the repulsive nature of Pauli's exclusion principle. In contrast to the spectrum, the fermionic $1$-particle density and correlation function do not show any sensitivity on the number parity. This suggests that reduced density matrix functional theory for strong attractive interactions has a more subtle $N$-dependency than density functional theory.
Duality of reduced density matrices and their eigenvalues
Christian Schilling,Rolf Schilling
Mathematics , 2014, DOI: 10.1088/1751-8113/47/41/415305
Abstract: For states of quantum systems of $N$ particles with harmonic interactions we prove that each reduced density matrix $\rho$ obeys a duality condition. This condition implies duality relations for the eigenvalues $\lambda_k$ of $\rho$ and relates a harmonic model with length scales $l_1,l_2, \ldots, l_N $ with another one with inverse lengths $1/l_1, 1/l_2,\ldots, 1/l_N$. Entanglement entropies and correlation functions inherit duality from $\rho$. Self-duality can only occur for noninteracting particles in an isotropic harmonic trap.
Evolution of the axial system in craniates: morphology and function of the perivertebral musculature
Nadja Schilling
Frontiers in Zoology , 2011, DOI: 10.1186/1742-9994-8-4
Abstract: The axial musculoskeletal system represents the plesiomorphic propulsive engine of the vertebrate body and maintains a central role in locomotion in all craniates. Considering its evolutionary antecedence to the appendicular system and its importance for locomotion, our understanding of the axial system is surprisingly limited compared to our understanding of the limbs.The evolution of the axial system is marked by profound changes in its morphology and function. The increasing differentiation of its muscular, neural, and skeletal elements is certainly partly responsible for the diversity of locomotor mechanics among craniates. The arrangements of the axial musculature among vertebrates show at least as much diversity as any other muscle system. Understanding the adaptive value of the various muscular arrangements is an undertaking to which this review attempts to contribute. To develop a plausible scenario of the evolutionary transitions in the structure and function of the perivertebral musculature, the functional, anatomical, and physiological characters of representatives of pivotal taxa were mapped onto a phylogenetic hypothesis. Such an approach allows inference of the most likely character set of the last common ancestor of the respective taxa as well as informed speculations concerning the patterns of locomotor and muscular evolution. The function of a muscle can be deduced from morphological and physiological variables such as its topography, fiber architecture, fiber-type composition, in-vivo muscle strain and ex-vivo work loops. The integration of these data with other physiological data such as the muscle's activity as well as with biomechanical data such as the associated locomotor kinematics allows one to test functional hypotheses and to infer a muscle's possible functions. Because only some of these variables have been studied in axial muscles of a number of craniates, inference of the muscle function will be based on a subset of this ideally availab
Stand der untersuchungen zur geschlechtskontrolle bei haustieren
E Schilling
Genetics Selection Evolution , 1978, DOI: 10.1186/1297-9686-10-1-147b
Review: Britta Kalscheuer & Lars Allolio-N cke (Hrsg.) (2008). Kulturelle Differenzen begreifen. Das Konzept der Transdifferenz aus interdisziplin rer Sicht Review: Britta Kalscheuer & Lars Allolio-N cke (Eds.) (2008). Kulturelle Differenzen begreifen [Understanding Cultural Differences: An Interdisciplinary Perspective on the Concept of Transdifference] Rese a: Britta Kalscheuer & Lars Allolio-N cke (Eds.) (2008). Kulturelle Differenzen begreifen [Comprender las diferencias culturales: Una perspectiva inte
Elisabeth Schilling
Forum : Qualitative Social Research , 2009,
Abstract: Der hier besprochene Sammelband Kulturelle Differenzen begreifen enth lt 20 Aufs tze, die aus den Perspektiven unterschiedlicher Disziplinen und Methoden den Transdifferenz-Begriff von Helmbrecht BREINIG und Klaus L SCH besprechen. Er basiert auf dem ersten, 2005 erschienen Band Differenzen anders denken, in dem das Konzept der Transdifferenz vorgestellt wurde. Das Buch ist in drei Kapitel gegliedert. Anfangs wird Transdifferenz im Hinblick auf andere kulturwissenschaftliche Konzepte besprochen und verortet, des Weiteren wird die Bedeutung der Differenz und Differenzierung bei der Bestimmung von Identit t(en) diskutiert, im letzten Kapitel erfolgt die überprüfung des Konzepts im Feld: es wird über die ersten Ergebnisse aus verschiedenen Studien berichtet. Hiernach besitzt das Konzept der Transdifferenz ein hohes Erkl rungspotenzial und kann vor allem für die Erkl rung unsicherer Transformationsprozesse erfolgversprechend eingesetzt werden. Als ein neues Konzept bedarf es allerdings noch weiterer betr chtlicher Arbeit, um es theoretisch zu kontextualisieren und empirisch zu überprüfen. Das Buch richtet sich an die wissenschaftliche ffentlichkeit und bietet einen tiefen Einblick in die Transkulturalit tsforschung. Aufgrund der sehr komplexen Auseinandersetzung mit Begriffen, Theorien und Methoden wird ein fundiertes Vorwissen der Lesenden vorausgesetzt. Deswegen eignet sich das Buch nur bedingt für die Lehre. URN: urn:nbn:de:0114-fqs0902107 The 20 articles in this volume discuss, from different methodological and theoretical perspectives, the term "transdifference," which was introduced by Helmbrecht BREINIG and Klaus L SCH. This work is based on the first volume "Differenzen anders denken," which was published in 2005 and introduced the term to the scientific community. The current volume contains three sections: in the first, authors discuss transdifference with regard to other concepts in cultural studies. The second section addresses the importance of difference and differentiation for identity issues. In the final chapter, several authors and research groups present findings from fieldwork based on the concept of transdifference. Overall, the authors state that concept has great potential to assert transformation processes. Much further work on theoretical contextualization and empirical approval is needed. The volume addresses the scientific community and provides a deep insight into transcultural research but its high level of complexity mean it is only appropriate for teaching well prepared graduates. URN: urn:nbn:de:0114-fqs0902107 Los 20 artícul
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