bluuebunny/crossref_metadata_2025_split huggingface dataset:
KEEFEKTIFAN MODEL LEARNING CYCLE 5E DIPADU TEKNIK MIND MAPPING UNTUK MENINGKATKAN KETERAMPILAN PROSES SAINS SISWA SMP
Authors: Nida Safwatun , Mahanal Susriyati , Pradana Diego 
Published: July 2017

Penelitian ini bertujuan untuk mengetahui keefektifan model Learning Cycle 5E dipadu teknik Mind Mapping dalam meningkatkan keterampilan proses sains siswa SMP.Subjek penelitian adalah siswa kelas VII SMPN I Malang yang dipilih secara purposive random sampling. Pengukuran data melalui lembar tes keterampilan proses sains yang dianalisis menggunakan statistik parametrik uji-t. Hasil penelitian menunjukkan bahwa penerapan model pembelajaran Learning Cycle 5E dipadu teknik Mind Mapping efektif untuk meningkatkan keterampilan proses sains siswa SMP. Kata Kunci: Learning Cycle 5e, Mind Mapping, Keterampilan Proses Sains
Armonización de la educación contable: el proyecto escolar de los gremios económicos
Authors: Quijano Valencia Olver 
Published: July 2017

La globalización en tanto marco referencial y régimen discursivo con efectos de verdad para nuestro tiempo, y pretexto para concretar un sinnúmero de intervenciones en favor de la gestión del mundo como mercado, al lado de la armonización en la nueva estructuración biopolítica del espacio-tiempo, y ante todo la estrategia de producción económica y la producción de la subjetividad, constituyen los ejes de la presente reflexión, en la que se examinan crítica y sugerentemente, las propuestas de armonización de la educación contable, como iniciativas de gremios económicos y de organismos nacionales y supranacionales, hoy convertidos en ‘nuevas instituciones misioneras’, en autoridades morales, profesionales y legales y nuevos centros de producción normativa. Desde este marco analítico se realiza un acercamiento a tales propuestas, explicando su carácter profesionalizante e instrumental, lo que ahonda en el ya criticado enfoque tradicional en el campo contable, y prolonga su distancia con la ciencia, los desarrollos disciplinarios, el dialogo de saberes entre otros, la investigación como actividad esencial y estratégica. No obstante se reconoce la necesidad de readecuar y/o reorientar el proceso de formación contable, a través de un amplio análisis no solo de las propuestas armonizadoras, sino en especial del conjunto de retos que enfrenta la educación contable en el propósito de superar la continuidad e intensificación profesional con orientación tecno-instrumental dando apertura a procesos inspirados en la formación en las poli-competencia que demanda un mundo complejo y la diversidad de contextos de vida y desempeño* Conferencia presentada en el "Coloquio Internacional de Contaduría Pública. Foro sobre Globalización y Contadurfa Pública. Federación Colombiana de Contadores Públicos y Cámara de Comercio de Bogotá. Septiembre 27 y 28 de 2002.
Wie Unternehmen Methoden erfolgreich nutzen können
Authors: Grabner Constantin , Glöckner Robert , Lödding Hermann 
Published: July 2017

Abstract
Spätestens mit der Verbreitung von Ganzheitlichen Produktionssystemen (GPS) hat ein methodisches Vorgehen zur Produktivitätssteigerung den Weg in Unternehmen gefunden. Der Blick in die Praxis offenbart allerdings, dass die Einführung gängiger Methoden nicht automatisch zum Erfolg führt. Dieser Fachartikel zeigt, welche Aufgaben für den erfolgreichen Umgang mit Methoden in Unternehmen erforderlich sind, und macht deutlich, welchen Beitrag die GPS-Grundstruktur dazu bereits liefert.*)
Intelligente Konsumgüterproduktion
Authors: Schenke Christer-Clifford , Finger Peter , Ihlenfeldt Steffen 
Published: July 2017

Abstract
Die Umformung von Karton ist eine Schlüsseltechnologie für die Herstellung nachhaltiger Verpackungslösungen auf der Basis vollständig rezyklier- und biologisch abbaubarer Fasermaterialien. Aus technologischer Sicht ist der Herstellungsprozess solcher Becher heute weitestgehend durchdrungen. Jedoch kann die vorhandene Anlagentechnik den Ansprüchen einer kommerziellen Massenfertigung aufgrund der stark schwankenden Materialeigenschaften des Kartons bislang nicht gerecht werden. Die Modularisierung der Produktionsanlage, eine Technologieregelung innerhalb der einzelnen Fertigungsmodule und die stoffliche als auch informationstechnische Vernetzung der Module zu einem Cyber-physischen Produktionssystem (CPPS) werden diese Lücke schließen.*)
Experimental Design Procedure for Optimization of Saponin Extraction from Glycyrrhiza glabra: A Biosurfactant for Emulsification of Heavy Crude Oil
Authors: Hajimohammadi Reza , Hosseini Morteza , Amani Hossein , Darzi Ghasem Najafpour 
Published: July 2017

Abstract
In petroleum industries, an emulsification process is often necessary to transfer and upgrade heavy crude oil. Saponins are the main group of biosurfactants used for this purpose and they are often extracted from plants. In this study, saponin was extracted from Glycyrrhiza glabra using a soxhlet method. The aim of present study was to optimize the effective parameters in production of saponin in order to obtain the maximum emulsification index (E24) and optimum mean droplet size by Taguchi method. The evaluated parameters include extraction temperature, first solvent volume fraction, second solvent volume fraction and n-butanol volume fraction. Response parameters resulted in yield, cost and E24 of produced saponin. The obtained results showed that temperature and n-butanol volume fraction were the most effective factors in the extraction process. Optimum operation condition including yield, cost and E24 were (3.6 ± 0.1) g/200 g of plant material, (3.4 ± 0.14) $/g and (98 ± 5) %, respectively. The mean droplet size of water in oil (W/O) emulsion was (35 ± 6) μm using dynamic light scattering (DLS) analysis. The results of present research could reduce the cost of saponin production for the applications in oil industries.
An improved preparation of phorbol from croton oil
Authors: Pagani Alberto , Gaeta Simone , Savchenko Andrei I , Williams Craig M , Appendino Giovanni 
Published: July 2017

Background: Croton oil is the only commercial source of the diterpenoid phorbol (1a), the starting material for the semi-synthesis of various diesters extensively used in biomedical research to investigate cell function and to evaluate in vivo anti-inflammatory activity. While efficient chemoselective esterification protocols have been developed for phorbol, its isolation from croton oil is technically complicated, and involves extensive manipulation of very toxic materials like the oil or its native diterpenoid fraction.Results: The preparation of a crude non-irritant phorboid mixture from croton oil was telescoped to only five operational steps, and phorbol could then be purified by gravity column chromatography and crystallization. Evidence is provided that two distinct phorboid chemotypes of croton oil exist, differing in the relative proportion of type-A and type-B esters and showing different stability to deacylation.Conclusion: The isolation of phorbol from croton oil is dangerous because of the toxic properties of the oil, poorly reproducible because of differences in its phorboid profile, and time-consuming because of the capricious final crystallization step. A solution for these issues is provided, suggesting that the poor-reproducibility of croton oil-based anti-inflammatory assays are the result of poor quality and/or inconsistent composition of croton oil.
Magnetohydrodynamic Models of Molecular Tornadoes
Authors: Au Kelvin , Fiege Jason D. 
Published: July 2017

Abstract
Recent observations near the Galactic Center (GC) have found several molecular filaments displaying striking helically wound morphology that are collectively known as molecular tornadoes. We investigate the equilibrium structure of these molecular tornadoes by formulating a magnetohydrodynamic model of a rotating, helically magnetized filament. A special analytical solution is derived where centrifugal forces balance exactly with toroidal magnetic stress. From the physics of torsional Alfvén waves we derive a constraint that links the toroidal flux-to-mass ratio and the pitch angle of the helical field to the rotation laws, which we find to be an important component in describing the molecular tornado structure. The models are compared to the Ostriker solution for isothermal, nonmagnetic, nonrotating filaments. We find that neither the analytic model nor the Alfvén wave model suffer from the unphysical density inversions noted by other authors. A Monte Carlo exploration of our parameter space is constrained by observational measurements of the Pigtail Molecular Cloud, the Double Helix Nebula, and the GC Molecular Tornado. Observable properties such as the velocity dispersion, filament radius, linear mass, and surface pressure can be used to derive three dimensionless constraints for our dimensionless models of these three objects. A virial analysis of these constrained models is studied for these three molecular tornadoes. We find that self-gravity is relatively unimportant, whereas magnetic fields and external pressure play a dominant role in the confinement and equilibrium radial structure of these objects.
What Is the Hidden Depolarization Mechanism in Low-luminosity AGNs?
Authors: Bower Geoffrey C. , Dexter Jason , Markoff Sera , Rao Ramprasad , Plambeck R. L. 
Published: July 2017

Abstract
Millimeter-wavelength polarimetry of accreting black hole systems can provide a tomographic probe of the accretion flow on a wide range of linear scales. We searched for linear polarization in two low-luminosity active galactic nuclei (LLAGNs), M81 and M84, using the Combined Array for Millimeter Astronomy and the Submillimeter Array. We find upper limits of ∼1%–2% averaging over the full bandwidth and with a rotation measure (RM) synthesis technique. These low polarization fractions, along with similarly low values for LLAGNs M87 and 3C 84, suggest that LLAGNs have qualitatively different polarization properties than radio-loud sources and Sgr A*. If the sources are intrinsically polarized and then depolarized by Faraday rotation, then we place lower limits on the RM of a few times

for the full bandwidth case and

for the RM synthesis analysis. These limits are inconsistent with or marginally consistent with expected accretion flow properties. Alternatively, the sources may be depolarized by cold electrons within a few Schwarzschild radii from the black hole, as suggested by numerical models.
Formation of Black Hole X-Ray Binaries with Non-degenerate Donors in Globular Clusters
Authors: Ivanova Natalia , Rocha Cassio A. da , Van Kenny X. , Nandez Jose L. A. 
Published: July 2017

Abstract
In this Letter, we propose a formation channel for low-mass X-ray binaries with black hole accretors and non-degenerate donors via grazing tidal encounters with subgiants. We estimate that in a typically dense globular cluster with a core density of 105 stars pc−3, the formation rates are about one binary per Gyr per 50–100 retained black holes. The donors—stripped subgiants—will be strongly underluminous when compared to subgiant or giant branch stars of the same colors. The products of tidal stripping are underluminous by at least one magnitude for several hundred million years when compared to normal stars of the same color, and differ from underluminous red stars that could be produced by non-catastrophic mass transfer in an ordinary binary. The dynamically formed binaries become quiescent LMXBs, with lifetimes of about a Gyr. The expected number of X-ray binaries is one per 50–200 retained black holes, while the expected number of strongly underluminous subsubgiant is about half this. The presence of strongly underluminous stars in a GC may be indicative of the presence of black holes.
Le nouveau djihadisme européen
Authors: Khosrokhavar Farhad 
Published: July 2017

Les nouveaux acteurs du djihadisme entre 2013 et 2016 sont nombreux, comparé à la situation de l’Europe dans la décennie précédente : de quelques centaines, le nombre des djihadistes s’est démultiplié et a atteint le nombre de cinq mille et plus ; le nombre et la proportion des femmes ont augmenté (d’une douzaine à cinq cents) ; les adolescent(e)s et postadolescent(e)s ont vu leur nombre s’accroître (entre dix et vingt pour cent selon les pays), ainsi que le nombre et la proportion des converti(e)s (entre huit et vingt pour cent selon les pays européens), le nombre et la proportion des cas psychopathologiques ayant augmenté (Al Qaïda les refusait, l’État islamique les a encouragés à venir les joindre). Le problème est de comprendre la diversité des acteurs et des actrices et leur motivation, bref leur subjectivation. Cet article tente de tracer la géographie contrastée de ce phénomène à partir d’une sociologie des acteurs.
Entre liberté de religion et liberté d’expression : émergence de la notion onusienne de « diffamation des religions »
Authors: Schwab Aurore 
Published: July 2017

L’articulation entre la liberté de religion et la liberté d’expression est un enjeu actuel des discussions entre les représentants des États membres de l’Organisation des nations unies. La notion de « diffamation des religions », fruit de débats onusiens, ambitionne de placer certaines limites à la liberté d’expression afin de favoriser la protection des sentiments religieux. Cet article analyse la formation de la première résolution onusienne sur la « diffamation des religions » en 1999 au sein de la Commission des droits de l’homme et met en lumière les dynamiques divergentes actuelles relatives à la reconnaissance globale des droits de l’homme.
Religion et race
Authors: Anidjar Gil 
Published: July 2017

On n’a pas toujours reconnu l’Autre comme « religieux ». On ne s’est pas partout servi du latin pour le comprendre, le classifier, le gouverner. Comme la race, la notion de religion n’est qu’un chapitre dans l’histoire du savoir et du pouvoir, chapitre provisoire, éphémère, embarrassant. Race et religion ? Contre une histoire qui les maintient distinctes et séparées, contre une périodisation qui conçoit la religion comme un « fait » archaïque ou immémorial, cet article propose de recadrer religion et race (et donc, religion et politique) comme deux notions contemporaines et coconstituées, éléments désintégrés d’une laïcité qui ignore sa propre histoire.
Les politiques « à la frontière » et « derrière la frontière » : quel impact sur la R&D réductrice de coût ?
Authors: Berthoumieu Julien , Bouët Antoine 
Published: July 2017

Cet article analyse l’impact de différentes politiques sur les dépenses privées de recherche & développement (R&D) réductrices de coût, au moyen d’un modèle de duopole international avec incertitude concernant le résultat de la R&D. Nous examinons l’impact de politiques « à la frontière » (droit de douane, quota d’importation, restriction volontaire des exportations et accord de prix minimum) et « derrière la frontière » (subvention de la production, subvention des investissements en R&D, investissement public en R&D). Les subventions de la R&D sont des instruments politiques intéressants, parce qu’ils soutiennent la R&D locale, la production locale et les profits sans porter atteinte au surplus des consommateurs locaux. Une analyse de bien-être conclut à la supériorité soit d’une subvention de la production, soit d’un droit de douane.
Application of Vectorial Wave Method in Free Vibration Analysis of Cylindrical Shells
Authors: Poultangari R. , Nikkhah-Bahrami M. 
Published: July 2017

AbstractThe vectorial form of the Wave Propagation Method (VWM), regarding the dispersion of harmonic plain (elasto-dynamic) waves within certain wave-guides, is developed for the vibration analysis of circular cylindrical shells. To obtain this goal, all plain waves are divided into positive-negative going wave vectors along with the shell axis. Based on the Flügge thin shell theory, the shell continuity as well as boundary conditions are well satisfied by introducing the propagation and reflection matrices. Furthermore, all elements of the reflection matrix are derived for certain classical supports. As an example, for demonstrating the feasibility of VWM in the shell vibration analysis, a circular cylindrical shell with two ended flexible support is adopted. The natural frequencies of the systemaswell asmode shapes are obtained using VWM. The aquired results are compared with those of the previous works and found in excellent agreement. It is also found that VWM could mathematically provide a reduced dimensional matrix (dominant matrix) to calculate the natural frequencies of the system. Accordingly, the proposed method can provide high computational efficiency and remarkable accuracy, simultaneously.
A Sharp Interface Method for Compressible Multi-Phase Flows Based on the Cut Cell and Ghost Fluid Methods
Authors: Bai Xiao , Deng Xiaolong 
Published: July 2017

AbstractA new sharp interface method with the combination of Ghost Fluid Method (GFM) and Cut Cell scheme is developed to study compressible multi-phase flows with clear interfaces. Straight-line cutting is applied on the cells passed by the interface. A new real-ghost mixing method is presented and applied around the cut cells to deal with very small cut cells. A cut face reconstruction method similar to volume of fluid is applied to deal with topological change problems. A high order Level Set (LS) method is applied to evolve the free interface, with the Level Set velocities from exact Riemann solver on the cut faces. Various 1D and 2D numerical examples are tested to show the robustness and ability of the present method in wide flow variable domains. This method benefits from cut cell on the sharp interface description, shows good conservation performance, and does not have the topological change difficulty of the full cut cell method presented in Chang, Deng & Theofanous, J. Comput. Phys., 242 (2013), pp. 946–990.
Lattice Boltzmann Simulation of Magnetic Field Effect on Natural Convection of Power-Law Nanofluids in Rectangular Enclosures
Authors: Wang Lei , Chai Zhenhua , Shi Baochang 
Published: July 2017

AbstractIn this paper, the magnetic field effects on natural convection of power-law nanofluids in rectangular enclosures are investigated numerically with the lattice Boltzmann method. The fluid in the cavity is a water-based nanofluid containing Cu nanoparticles and the investigations are carried out for different governing parameters including Hartmann number (0.0≤Ha≤20.0), Rayleigh number (104≤Ra≤106), power-law index (0.5≤n≤1.0), nanopartical volume fraction (0.0≤ϕ≤0.1) and aspect ratio (0.125≤AR≤8.0). The results reveal that the flow oscillations can be suppressed effectively by imposing an external magnetic field and the augmentation of Hartmann number and power-law index generally decreases the heat transfer rate. Additionally, it is observed that the average Nusselt number is increased with the increase of Rayleigh number and nanoparticle volume fraction. Moreover, the present results also indicate that there is a critical value for aspect ratio at which the impact on heat transfer is the most pronounced.
Asymptotic Analysis of Travelling Wave Solutions in Chemotaxis with Growth
Authors: Djomegni P. M. Tchepmo , Govinder K. S. 
Published: July 2017

AbstractMass migration of cells (via wave motion) plays an important role in many biological processes, particularly chemotaxis. We study the existence of travelling wave solutions for a chemotaxis model on a microscopic scale. The interaction between nutrients and chemoattractants are considered. Unlike previous approaches, we allow for diffusion of substrates, degradation of chemoattractants and cell growth (constant and linear growth rate). We apply asymptotic methods to investigate the behaviour of the solutions when cells are highly sensitive to extracellular signalling. Explicit solutions are demonstrated, and their biological implications are presented. The results presented here extend and generalize known results.
O centenário de Guerreiro Ramos e sua atualidade para o ensino de Ciências Sociais no Brasil
Authors: Oliveira Amurabi 
Published: July 2017

http://dx.doi.org/10.5007/2175-8034.2016v18n1p141Nos últimos anos, a obra de Alberto Guerreiro Ramos (1915-1982) tem sido constantemente revisitada, o que se conecta às transformações vivenciadas nas Ciências Sociais brasileiras nos últimos anos. Porém, um aspecto ainda pouco explorado tem sido sua contribuição para o campo do ensino, mais especificamente do ensino de Ciências Sociais. Nesse artigo, busca-se analisar a contribuição de Guerreiro Ramos para a discussão sobre o ensino de Ciências Sociais, tomando como fio condutor principal suas ideias expostas em Cartilha Brasileira do Aprendiz de Sociólogo (1954) destacando a atualidade das questões expostas.
O mito da revolução, Guerreiro Ramos e o golpe de 1964
Authors: Nogueira João Carlos 
Published: July 2017

http://dx.doi.org/10.5007/2175-8034.2016v18n1p159Neste artigo, vamos perseguir a hipótese em algumas dimensões já exploradas no campo da Sociologia e da Ciência Política, sobre o político Guerreiro Ramos. Essa hipótese consiste no fato de que o sociólogo acreditava numa revolução social e política, mas era cético quanto aos seus atores: os partidos (PCB e PTB), por um lado; por outro, não verificava consistência na sociedade civil organizada, expressa pelos intelectuais reunidos no ISEB, por exemplo, sindicatos e movimentos urbanos e rurais. Esse paradoxo persegue as posições críticas de Guerreiro Ramos até o momento em que foi cassado pelo golpe militar, em abril de 1964. Outro propósito subsidiário de nossa hipótese é verificar também a contribuição do sociólogo e político para a Sociologia e a Ciência Política brasileira, considerando os projetos em disputa sobre o desenvolvimento em curso no país nos anos de 1950 e 1960, na esteira do golpe militar de 1964.
Um discípulo de Guerreiro e também um “fora da horda”
Authors: Brigagão Clovis 
Published: July 2017

http://dx.doi.org/10.5007/2175-8034.2016v18n1p255Em 1962 me formei em Administração Pública pela Escola Brasileira de Administração Pública, da FGV, onde o professor Guerreiro Ramos era professor; depois fui fazer o mestrado em ciência política no Instituto Universitário de Pesquisas do Rio de Janeiro (IUPERJ). Mais tarde, exilado, fui para o México, no El Colégio de México e, de lá, para a Universidade de Chicago para fazer o doutorado como cientista político.
Guerreiro Ramos e “O Drama de ser Dois”
Authors: Azevêdo Ariston , Albernaz Renata Ovenhausen 
Published: July 2017

http://dx.doi.org/10.5007/2175-8034.2016v18n1p41O artigo propõe uma crítica sobre a forma como a ideia de simetria tem sido acionada pela produção em antropologia da ciência brasileira. Seus vínculos promovem associações à terminologia da ANT que representam poucos esforços efetivos de implementação do projeto proposto por Bruno Latour (1994). A partir dessa análise, são sugeridas bases para um protocolo de estudos antropológicos sobre as ciências que considerem a especificidade do estatuto da (não) modernidade no Brasil.