bluuebunny/crossref_metadata_2025_split huggingface dataset:
AVALIAÇÃO DA CONDUTIVIDADE HIDRÁULICA PARA SOLOS COMPACTADOS UTILIZADOS EM CAMADAS SELANTES E ANÁLISE DE ESTABILIDADE DE ATERRO PARA RESÍDUOS SÓLIDOS DA PERFURAÇÃO DE POÇOS DE PETRÓLEO
Authors: Pereira Alexandre Da Costa 
Published: August 2014

Este estudo avaliou geotecnicamente (ensaios de laboratório, de campo e simulações numéricas) realizados com o objetivo de caracterizar solos naturais e solos compactados para projeto e execução de células de aterro para resíduos industriais oriundos da atividade petrolífera que, pelo fato de não se enquadrarem nas classificações de resíduos Classe I (Perigosos) ou Classe II-B (Não Perigosos/Inertes), podendo ter propriedades como biodegradabilidade, combustibilidade ou solubilidade em água, são classificados como não perigosos (Classe II-a: Não inertes - NBR10.004/2004). Para a necessária avaliação da segurança da obra frente ao risco de contaminação pela percolação pela base dos aterros, bem como referente à avaliação da segurança frente ao risco de ruptura dos taludes de contenção, o presente trabalho tratará da avaliação dos seguintes pontos: avaliação da capacidade do solo compactado (camada selante) da base do aterro em propiciar valores de condutividade hidráulica inferiores a 10-7cm/s (proteção eficiente e segura do lençol freático) e avaliação da estabilidade dos taludes projetados.
Conclui-se que os estudos de campo realizados para a determinação da condutividade hidráulica dos solos indicam que os materiais avaliados podem ser caracterizados como de baixa condutividade hidráulica. As análises da estabilidade por métodos de equilíbrio-limite, com o auxilio da ferramenta computacional, mostraram que o talude apresenta-se estável e não sujeito a grandes deslizamentos, pois os fatores de segurança calculados por diferentes métodos resultaram valores bem maiores que o mínimo (FSmin = 1,5) para qualquer um dos métodos utilizados, mesmo com a redução dos parâmetros de resistência dos solos em 40%.
Architecture of Upper Cretaceous rhyodacitic hyaloclastite at the polymetallic Madneuli deposit, Lesser Caucasus, Georgia
Authors: Popkhadze Nino , Moritz Robert , Gugushvili Vladimer 
Published: August 2014

AbstractThis study focuses on a well-exposed section of the Artvin-Bolnisi zone located in the open pit of the Madneuli ore deposit, Lesser Caucasus, Georgia. Detailed field and petrographic observations of the main volcano-sedimentary lithofacies of its Upper Cretaceous stratigraphic succession were carried out. Whole rock geochemistry studies support the interpretation of intense silicification of the rocks, and supports our petrographic studies of samples from the Madneuli open pit, including lobe-hyaloclastite described in detail during this study. A particular focus concerned lobe-hyaloclastite exposures in the Madneuli open pit, singled out for first time in this area of the Lesser Caucasus. Two types of hyaloclastite are recognized at the Madneuli deposit: hyaloclastite with pillow-like forms and hyaloclastite with glass-like selvages. The petrographic description shows a different nature for both: hyaloclastite with glass-like selvages represented by devitrification of volcanic glass, which is replaced by quartz and K-feldspar overgrowth of crystals in the groundmass and elongated K-feldspar porphyry phenocrysts. Perlitic cracks were identified during thin section observation. The Hyaloclastite with pillow-like forms consists of relicts of volcanic glass and large pumice clasts replaced by sericite. Key observations are presented in the case of lobe-hyaloclastite and their immediate host volcano-sedimentary environment to constrain their depositional setting. A paleoreconstruction of their environment is proposed, in which hyaloclastite record the interaction of magma emplaced in unconsolidated volcano-sedimentary rocks associated with a submarine rhyodacite dome, emplaced during several magmatic pulses. Our study shows that the predominant part of the host rock sequence of the Madneuli polymetallic deposit was deposited under submarine conditions, which is in agreement with volcanogenic massive sulfide models or transitional, shallow submarine magmatic to epithermal models that were proposed by previous studies.
Knowing, Counting, Being: Meillassoux, Heidegger, and the Possibility of Science
Authors: Gall Robert S. 
Published: August 2014

ABSTRACT
In his book After Finitude, Quentin Meillassoux criticizes post-Kantian philosophy for its inability to explain how science is able to describe a world without human beings. This article addresses that challenge through a consideration of Heidegger's thought and his thinking about science. It is argued that the disagreement between Meillassoux and Heidegger comes down to a question of first philosophy and the priority of logic or ontology in philosophy. Ultimately, Heidegger's emphasis on ontology in philosophy is superior in its ability to give a more comprehensive account of science and thinking about things themselves.
Foreign Bodies: Psychoanalysis and Neuroscience
Authors: Rottenberg Elizabeth 
Published: August 2014

ABSTRACT
To what extent, this article asks, does the drive to reconcile psychoanalysis with neuroscience risk participating in a movement of appropriation, an attempt to reduce the event of psychoanalysis? This article shows how the neuro-psychoanalytic attempt to locate a psychoanalytic understanding of the mind in the brain does not end up correlating psychoanalysis with neuroscience; rather, it points to another, less conciliatory model for their relationship. In psychoanalysis, neurology encounters a Fremdkörper (foreign body), something unassimilable to its inside, something forever inside-outside any neurological theory of trauma. This Fremdkörper prevents neurology from reducing neurological traumas to mere cerebral laws; it is what makes every neurological trauma traumatic in its own way.
The Other (Woman): Limits of Knowledge in Beauvoir's Ethics of Reciprocity
Authors: Anderson Ellie 
Published: August 2014

ABSTRACT
The ethics of reciprocity offered by Simone de Beauvoir is founded upon an irreducible epistemic gap between self and other. This gap is often overlooked by commentators, who have tended to imply that the ethics of reciprocity requires recognition of oneself in the other. I claim that Beauvoir's ethics forecloses such recognition of oneself in the other and reveals that it is at once illusory and dangerous. Recognition in this sense is based upon a false notion of self and constitutes a violation of the alterity of the other. I argue that Beauvoir stages this dangerous form of recognition in her novel She Came to Stay, while her claims about reciprocity in The Second Sex provide an image of a different, more positive recognition capable of respecting alterity. Finally, I claim that the epistemic gap characteristic of reciprocity also holds with respect to one's self-relation.
La apropiación audiovisual y la autoproducción. Entre una práctica artística y una táctica cultural
Authors: Rodríguez Sagrario Martín 
Published: August 2014

La apropiación audiovisual es analizada en esta investigación como fenómeno ante la omnipresencia de los medios, la ubicuidad de la imagen, el progreso tecnológico, etc., que han transformado nuestros hábitos visuales y también como han afectado al mundo del arte.Se van a analizar cómo los paradigmas tradicionales han sido modificados en cuanto a la forma de concebir la creación artística y la manera de enfrentarse a las imágenes audiovisuales del creciente paisaje mediático.Por último se realizará un breve apunte de la apropiación audiovisual como respuesta posmoderna a los nuevos espacios y políticas de de los medios dominantes de producción, subvertir los roles tradicionales en la creación y desmantelar los significados impuestos.AbstractThe audiovisual appropriation is analyzed, in this investigation, like a phenomenon facing the media omnipresence, image ubiquity, technological progress, etc., that has transformed our visual habits and also affected art’s world.We are going to analyze how the traditional paradigm has been modified regarding the artistic creation perception, aswell as, the way of facing audiovisual images in the growing media landscape.Finally, we will make a brief note about the audiovisual appropriation as a postmodern response to the new dominating production media spaces and politics, that undermines the traditional creation roles and dismantles the impose meanings.
GRAIL gravity constraints on the vertical and lateral density structure of the lunar crust
Authors: Besserer Jonathan , Nimmo Francis , Wieczorek Mark A. , Weber Renee C. , Kiefer Walter S. , McGovern Patrick J. , Andrews‐Hanna Jeffrey C. , Smith David E. , Zuber Maria T. 
Published: August 2014

AbstractWe analyzed data from the Gravity Recovery and Interior Laboratory (GRAIL) mission using a localized admittance approach to map out spatial variations in the vertical density structure of the lunar crust. Mare regions are characterized by a distinct decrease in density with depth, while the farside is characterized by an increase in density with depth at an average gradient of ∼35 kg m−3 km−1 and typical surface porosities of at least 20%. The Apollo 12 and 14 landing site region has a similar density structure to the farside, permitting a comparison with seismic velocity profiles. The interior of the South Pole‐Aitken (SP‐A) impact basin appears distinct with a near‐surface low‐density (porous) layer 2–3 times thinner than the rest of the farside. This result suggests that redistribution of material during the large SP‐A impact likely played a major role in sculpting the lunar crust.
Large‐scale inflation of Tungurahua volcano (Ecuador) revealed by Persistent Scatterers SAR interferometry
Authors: Champenois J. , Pinel V. , Baize S. , Audin L. , Jomard H. , Hooper A. , Alvarado A. , Yepes H. 
Published: August 2014

AbstractThe Tungurahua volcano, in Ecuador, has been experiencing a substantial activity period since 1999, with several eruptions, including those of 2006 and 2008. We use a persistent scatterers approach to analyze a time series of Envisat synthetic aperture radar (SAR) data over the period 2003–2009, to investigate surface deformation in the region of the volcano. We measure a continuous large‐scale uplift with a maximum line of sight displacement rate of about 8 mm/yr, which is the first evidence of a sustained inflation in the Andes for an active volcano encompassing several eruptions. We model this signal as magma emplacement in a permanent storage zone at 11.5 km below sea level, with a net inflow rate of 7 million m3/yr. The paroxysmal eruptions in 2006 and 2008 did not seem to disrupt this long‐term signal. However, we observe significant deformation during the 2006 eruption consistent with an additional intrusion of 4.5 million m3 of magma.
Nonlinear electric field structures in the inner magnetosphere
Authors: Malaspina D. M. , Andersson L. , Ergun R. E. , Wygant J. R. , Bonnell J. W. , Kletzing C. , Reeves G. D. , Skoug R. M. , Larsen B. A. 
Published: August 2014

AbstractVan Allen Probes observations are presented which demonstrate the presence of nonlinear electric field structures in the inner terrestrial magnetosphere (<6 RE). A range of structures are observed, including phase space holes and double layers. These structures are observed over several Earth radii in radial distance and over a wide range of magnetic local times. They are observed in the dusk, midnight, and dawn sectors, with the highest concentration premidnight. Some nonlinear electric field structures are observed to coincide with dipolarizations of the magnetic field and increases in electron energy flux for energies between 1 keV and 30 keV. Nonlinear electric field structures possess isolated impulsive electric fields, often with a significant component parallel to the ambient magnetic field, providing a mechanism for nonadiabatic wave‐particle interactions in the inner magnetosphere.
The role of land cover change in modulating the soil moisture‐temperature land‐atmosphere coupling strength over Australia
Authors: Hirsch A. L. , Pitman A. J. , Kala J. 
Published: August 2014

AbstractThe severity of recent droughts and heat waves have been linked to land‐atmosphere feedbacks. However, investigations of how these feedbacks are influenced by land use and land cover change (LULCC) are limited. Using the Weather and Research Forecasting model with an ensemble framework of planetary boundary layer and cumulus parameterization schemes, we combine the Global Land Atmosphere Coupling Experiment methodology with LULCC to assess how LULCC affects land‐atmosphere coupling strength for maximum temperature over Australia. We find a statistically significant decrease in soil moisture‐temperature coupling over regions where forest changes to crops, which was consistent across the implemented model physics and background climate. This was associated with a decrease in the ensemble mean variance suggesting that LULCC influences regional climate variability via changes in the regional scale hydrology and surface energy balance. Our results highlight the need to consider land surface changes and coupling strength in combination, rather than in isolation.
Efficient and Selective Formation of Unsaturated Carboxylic and Phenylacetic Acids from Diketene
Authors: Mori Takamichi , Akioka Yusuke , Kawahara Hisaho , Ninokata Ryo , Onodera Gen , Kimura Masanari 
Published: August 2014

AbstractA nickel catalyst promotes the multicomponent coupling reaction of diketene, an alkyne, and Me2Zn to provide 3‐methylene‐4‐hexenoic acids in excellent yields. Under similar conditions, the combination of the nickel catalyst and Et2Al(OEt) promotes a cycloaddition reaction involving dimerization of an alkyne to furnish phenylacetic acids. In the presence of PPh3, a formal [2+2+1+1] cycloaddition reaction proceeds to afford regioisomeric phenylacetic acids via cleavage of the CC bond.
Structure, stability, and IgE binding of the peach allergen Peamaclein (Pru p 7)
Authors: Tuppo Lisa , Spadaccini Roberta , Alessandri Claudia , Wienk Hans , Boelens Rolf , Giangrieco Ivana , Tamburrini Maurizio , Mari Adriano , Picone Delia , Ciardiello Maria Antonietta 
Published: August 2014

ABSTRACTKnowledge of the structural properties of allergenic proteins is a necessary prerequisite to better understand the molecular bases of their action, and also to design targeted structural/functional modifications. Peamaclein is a recently identified 7 kDa peach allergen that has been associated with severe allergic reactions in sensitive subjects. This protein represents the first component of a new allergen family, which has no 3D structure available yet. Here, we report the first experimental data on the 3D‐structure of Peamaclein. Almost 75% of the backbone resonances, including two helical stretches in the N‐terminal region, and four out of six cysteine pairs have been assigned by 2D‐NMR using a natural protein sample. Simulated gastrointestinal digestion experiments have highlighted that Peamaclein is even more resistant to digestion than the peach major allergen Pru p 3. Only the heat‐denatured protein becomes sensitive to intestinal proteases. Similar to Pru p 3, Peamaclein keeps its native 3D‐structure up to 90°C, but it becomes unfolded at temperatures of 100–120°C. Heat denaturation affects the immunological properties of both peach allergens, which lose at least partially their IgE‐binding epitopes. In conclusion, the data collected in this study provide a first set of information on the molecular properties of Peamaclein. Future studies could lead to the possible use of the denatured form of this protein as a vaccine, and of the inclusion of cooked peach in the diet of subjects allergic to Peamaclein. © 2014 Wiley Periodicals, Inc. Biopolymers (Pept Sci) 102: 416–425, 2014.
Determination of the elastic properties of short ssDNA molecules by mechanically folding and unfolding DNA hairpins
Authors: Alemany Anna , Ritort Felix 
Published: August 2014

ABSTRACTThe characterization of elastic properties of biopolymers is crucial to understand many molecular reactions determined by conformational bending fluctuations of the polymer. Direct measurement of such elastic properties using single‐molecule methods is usually hindered by the intrinsic tendency of such biopolymers to form high‐order molecular structures. For example, single‐stranded deoxyribonucleic acids (ssDNA) tend to form secondary structures such as local double helices that prevent the direct measurement of the ideal elastic response of the ssDNA. In this work, we show how to extract the ideal elastic response in the entropic regime of short ssDNA molecules by mechanically pulling two‐state DNA hairpins of different contour lengths. This is achieved by measuring the force dependence of the molecular extension and stiffness on mechanically folding and unfolding the DNA hairpin. Both quantities are fit to the worm‐like chain elastic model giving values for the persistence length and the interphosphate distance. This method can be used to unravel the elastic properties of short ssDNA and RNA sequences and, more generally, any biopolymer that can exhibit a cooperative two‐state transition between mechanically folded and unfolded states (such as proteins). © 2014 Wiley Periodicals, Inc. Biopolymers 101: 1193–1199, 2014.
Nickel(II) Complexes of Pentadentate N5 Ligands as Catalysts for Alkane Hydroxylation by Using m‐CPBA as Oxidant: A Combined Experimental and Computational Study
Authors: Sankaralingam Muniyandi , Balamurugan Mani , Palaniandavar Mallayan , Vadivelu Prabha , Suresh Cherumuttathu H. 
Published: August 2014

AbstractA new family of nickel(II) complexes of the type [Ni(L)(CH3CN)](BPh4)2, where L=N‐methyl‐N,N′,N′‐tris(pyrid‐2‐ylmethyl)‐ethylenediamine (L1, 1), N‐benzyl‐N,N′,N′‐tris(pyrid‐2‐yl‐methyl)‐ethylenediamine (L2, 2), N‐methyl‐N,N′‐bis(pyrid‐2‐ylmethyl)‐N′‐(6‐methyl‐pyrid‐2‐yl‐methyl)‐ethylenediamine (L3, 3), N‐methyl‐N,N′‐bis(pyrid‐2‐ylmethyl)‐N′‐(quinolin‐2‐ylmethyl)‐ethylenediamine (L4, 4), and N‐methyl‐N,N′‐bis(pyrid‐2‐ylmethyl)‐N′‐imidazole‐2‐ylmethyl)‐ethylenediamine (L5, 5), has been isolated and characterized by means of elemental analysis, mass spectrometry, UV/Vis spectroscopy, and electrochemistry. The single‐crystal X‐ray structure of [Ni(L3)(CH3CN)](BPh4)2 reveals that the nickel(II) center is located in a distorted octahedral coordination geometry constituted by all the five nitrogen atoms of the pentadentate ligand and an acetonitrile molecule. In a dichloromethane/acetonitrile solvent mixture, all the complexes show ligand field bands in the visible region characteristic of an octahedral coordination geometry. They exhibit a one‐electron oxidation corresponding to the NiII/NiIII redox couple the potential of which depends upon the ligand donor functionalities. The new complexes catalyze the oxidation of cyclohexane in the presence of m‐CPBA as oxidant up to a turnover number of 530 with good alcohol selectivity (A/K, 7.1–10.6, A=alcohol, K=ketone). Upon replacing the pyridylmethyl arm in [Ni(L1)(CH3CN)](BPh4)2 by the strongly σ‐bonding but weakly π‐bonding imidazolylmethyl arm as in [Ni(L5)(CH3CN)](BPh4)2 or the sterically demanding 6‐methylpyridylmethyl ([Ni(L3)(CH3CN)](BPh4)2 and the quinolylmethyl arms ([Ni(L4)(CH3CN)](BPh4)2, both the catalytic activity and the selectivity decrease. DFT studies performed on cyclohexane oxidation by complexes 1 and 5 demonstrate the two spin‐state reactivity for the high‐spin [(N5)NiIIO.] intermediate (ts1hs, ts2doublet), which has a low‐spin state located closely in energy to the high‐spin state. The lower catalytic activity of complex 5 is mainly due to the formation of thermodynamically less accessible m‐CPBA‐coordinated precursor of [NiII(L5)(OOCOC6H4Cl)]+ (5 a). Adamantane is oxidized to 1‐adamantanol, 2‐adamantanol, and 2‐adamantanone (3°/2°, 10.6–11.5), and cumene is selectively oxidized to 2‐phenyl‐2‐propanol. The incorporation of sterically hindering pyridylmethyl and quinolylmethyl donor ligands around the NiII leads to a high 3°/2° bond selectivity for adamantane oxidation, which is in contrast to the lower cyclohexane oxidation activities of the complexes.
Copper‐Catalyzed Aerobic Oxidative Inert CC and CN Bond Cleavage: A New Strategy for the Synthesis of Tertiary Amides
Authors: Chen Xiuling , Chen Tieqiao , Li Qiang , Zhou Yongbo , Han Li‐Biao , Yin Shuang‐Feng 
Published: August 2014

AbstractA copper‐catalyzed aerobic oxidative amidation reaction of inert CC bonds with tertiary amines has been developed for the synthesis of tertiary amides, which are significant units in many natural products, pharmaceuticals, and fine chemicals. This method combines CC bond activation, CN bond cleavage, and CH bond oxygenation in a one‐pot protocol, using molecular oxygen as the sole oxidant without any additional ligands.
Di‐ and Triarylmethylium Ions as Probes for the Ambident Reactivities of Carbanions Derived from 5‐Benzylated Meldrum’s Acid
Authors: Chen Xi , Tan Yue , Berionni Guillaume , Ofial Armin R. , Mayr Herbert 
Published: August 2014

AbstractThe kinetics of the reactions of carbocations with carbanions1derived from 5‐benzyl‐substituted Meldrum’s acids1‐H(Meldrum’s acid=2,2‐dimethyl‐1,3‐dioxane‐4,6‐dione) were investigated by UV/Vis spectroscopic methods. Benzhydryl cations Ar2CH+added exclusively to C‐5 of the Meldrum’s acid moiety. As the second‐order rate constants (kC) of these reactions in DMSO followed the linear free‐energy relationship lg k=sN(N+E), the nucleophile‐specific reactivity parametersNandsNfor the carbanions1could be determined. In contrast, trityl cations Ar3C+reacted differently. While tritylium ions of low electrophilicity (E<−2) reacted with1through rate‐determining β‐hydride abstraction, more Lewis acidic tritylium ions initially reacted at the carbonyl oxygen of1to form trityl enolates, which subsequently reionized and eventually yielded triarylmethanes and 5‐benzylidene Meldrum’s acids by hydride transfer.
Lanthanide‐to‐Lanthanide Energy‐Transfer Processes Operating in Discrete Polynuclear Complexes: Can Trivalent Europium Be Used as a Local Structural Probe?
Authors: Zaïm Amir , Eliseeva Svetlana V. , Guénée Laure , Nozary Homayoun , Petoud Stéphane , Piguet Claude 
Published: August 2014

AbstractThis work, based on the synthesis and analysis of chemical compounds, describes a kinetic approach for identifying intramolecular intermetallic energy‐transfer processes operating in discrete polynuclear lanthanide complexes, with a special emphasis on europium‐containing entities. When all coordination sites are identical in a (supra)molecular complex, only heterometallic communications are experimentally accessible and a Tb→Eu energy transfer could be evidenced in [TbEu(L5)(hfac)6] (hfac=hexafluoroacetylacetonate), in which the intermetallic separation amounts to 12.6 Å. In the presence of different coordination sites, as found in the trinuclear complex [Eu3(L2)(hfac)9], homometallic communication can be induced by selective laser excitation and monitored with the help of high‐resolution emission spectroscopy. The narrow and non‐degenerated character of the Eu(5D0↔7F0) transition excludes significant spectral overlap between donor and acceptor europium cations. Intramolecular energy‐transfer processes in discrete polynuclear europium complexes are therefore limited to short distances, in agreement with the Fermi golden rule and with the kinetic data collected for [Eu3(L2)(hfac)9] in the solid state and in solution. Consequently, trivalent europium can be considered as a valuable local structural probe in discrete polynuclear complexes displaying intermetallic separation in the sub‐nanometric domain, a useful property for probing lanthanido‐polymers.