Interplay of phase boundary anisotropy and electro-autocatalytic surface reactions on the lithium intercalation dynamics in LiX_XFePO4_4 platelet-like nanoparticles

Experiments on single crystal Li$_X$FePO$_4$ (LFP) nanoparticles indicate rich nonequilibrium phase behavior, such as suppression of phase separation at high lithiation rates, striped patterns of coherent phase boundaries, nucleation by binarysolid surface wetting and intercalation waves. These observations have been successfully predicted (prior to the experiments) by 1D depth-averaged phase-field models, which neglect any subsurface phase separation. In this paper, using an electro-chemo-mechanical phase-field model, we investigate the coherent non-equilibrium subsurface phase morphologies that develop in the $ab$- plane of platelet-like single-crystal platelet-like Li$_X$FePO$_4$ nanoparticles. Finite element simulations are performed for 2D plane-stress conditions in the $ab$- plane, and validated by 3D simulations, showing similar results. We show that the anisotropy of the interfacial tension tensor, coupled with electroautocatalytic surface intercalation reactions, plays a crucial role in determining the subsurface phase morphology. With isotropic interfacial tension, subsurface phase separation is observed, independent of the reaction kinetics, but for strong anisotropy, phase separation is controlled by surface reactions, as assumed in 1D models. Moreover, the driven intercalation reaction suppresses phase separation during lithiation, while enhancing it during delithiation, by electro-autocatalysis, in quantitative agreement with {\it in operando} imaging experiments in single-crystalline nanoparticles, given measured reaction rate constants

Spitzer IRAC Observations of Star Formation in N159 in the LMC

We present observations of the giant HII region complex N159 in the LMC using IRAC on the {\it Spitzer Space Telescope}. One of the two objects previously identified as protostars in N159 has an SED consistent with classification as a Class I young stellar object (YSO) and the other is probably a Class I YSO as well, making these two stars the youngest stars known outside the Milky Way. We identify two other sources that may also be Class I YSOs. One component, N159AN, is completely hidden at optical wavelengths, but is very prominent in the infrared. The integrated luminosity of the entire complex is L $\approx 9\times10^6$L$_{\odot}$, consistent with the observed radio emission assuming a normal Galactic initial mass function (IMF). There is no evidence for a red supergiant population indicative of an older burst of star formation. The N159 complex is 50 pc in diameter, larger in physical size than typical HII regions in the Milky Way with comparable luminosity. We argue that all of the individual components are related in their star formation history. The morphology of the region is consistent with a wind blown bubble $\approx 1-2Myr-old that has initiated star formation now taking place at the rim. Other than its large physical size, star formation in N159 appears to be indistinguishable from star formation in the Milky Way.Comment: 14 figure

Embedding of Cortical Representations by the Superficial Patch System

Pyramidal cells in layers 2 and 3 of the neocortex of many species collectively form a clustered system of lateral axonal projections (the superficial patch system—Lund JS, Angelucci A, Bressloff PC. 2003. Anatomical substrates for functional columns in macaque monkey primary visual cortex. Cereb Cortex. 13:15-24. or daisy architecture—Douglas RJ, Martin KAC. 2004. Neuronal circuits of the neocortex. Annu Rev Neurosci. 27:419-451.), but the function performed by this general feature of the cortical architecture remains obscure. By comparing the spatial configuration of labeled patches with the configuration of responses to drifting grating stimuli, we found the spatial organizations both of the patch system and of the cortical response to be highly conserved between cat and monkey primary visual cortex. More importantly, the configuration of the superficial patch system is directly reflected in the arrangement of function across monkey primary visual cortex. Our results indicate a close relationship between the structure of the superficial patch system and cortical responses encoding a single value across the surface of visual cortex (self-consistent states). This relationship is consistent with the spontaneous emergence of orientation response-like activity patterns during ongoing cortical activity (Kenet T, Bibitchkov D, Tsodyks M, Grinvald A, Arieli A. 2003. Spontaneously emerging cortical representations of visual attributes. Nature. 425:954-956.). We conclude that the superficial patch system is the physical encoding of self-consistent cortical states, and that a set of concurrently labeled patches participate in a network of mutually consistent representations of cortical inpu

The Transformation of Men into Masquerades and Indian Madras into Masquerade Cloth in Buguma, Nigeria

The Kalahari Ijo people of the Niger Delta area of southeastern Nigeria use a group of dark indigo-blue cloths with white patterning to cover the faces of masquerade performers. Subsumed under the name of alubite (masquerade cloth) are at least three distinct types: (1) ukara cloth, an indigo-resist of imported muslin, stitched and dyed by Igbo craftsmen, (2) alubite cloth, a gauze-weave, also an indigo-resist, but of unknown provenance, and (3) pelete bite, an Indian madras from which threads are cut and pulled by Kalahari women to form a new pattern. The first two types of cloth apparently come from non-Kalahari sources. The third, pelete bite, transforms dark blue and white imported madras, using local technology, into a patterned masquerade cloth for which there is a cultural demand. We focus on this transformation, examining particular types of Indian madras considered appropriate for this adaptation and the ways that these cloths are altered (i.e., cut and pulled), their relationship in color and design to ukara and to the other alubite cloths, and the significance of the triangular motif, alu, for depicting water spirits in masquerade performances

The Transformation of Men into Masquerades and Indian Madras into Masquerade Cloth in Buguma, Nigeria

The Kalahari Ijo people of the Niger Delta area of southeastern Nigeria use a group of dark indigo-blue cloths with white patterning to cover the faces of masquerade performers. Subsumed under the name of alubite (masquerade cloth) are at least three distinct types: (1) ukara cloth, an indigo-resist of imported muslin, stitched and dyed by Igbo craftsmen, (2) alubite cloth, a gauze-weave, also an indigo-resist, but of unknown provenance, and (3) pelete bite, an Indian madras from which threads are cut and pulled by Kalahari women to form a new pattern. The first two types of cloth apparently come from non-Kalahari sources. The third, pelete bite, transforms dark blue and white imported madras, using local technology, into a patterned masquerade cloth for which there is a cultural demand. We focus on this transformation, examining particular types of Indian madras considered appropriate for this adaptation and the ways that these cloths are altered (i.e., cut and pulled), their relationship in color and design to ukara and to the other alubite cloths, and the significance of the triangular motif, alu, for depicting water spirits in masquerade performances

The Transformation of Men into Masquerades and Indian Madras into Masquerade Cloth in Buguma, Nigeria

The Kalahari Ijo people of the Niger Delta area of southeastern Nigeria use a group of dark indigo-blue cloths with white patterning to cover the faces of masquerade performers. Subsumed under the name of alubite (masquerade cloth) are at least three distinct types: (1) ukara cloth, an indigo-resist of imported muslin, stitched and dyed by Igbo craftsmen, (2) alubite cloth, a gauze-weave, also an indigo-resist, but of unknown provenance, and (3) pelete bite, an Indian madras from which threads are cut and pulled by Kalahari women to form a new pattern. The first two types of cloth apparently come from non-Kalahari sources. The third, pelete bite, transforms dark blue and white imported madras, using local technology, into a patterned masquerade cloth for which there is a cultural demand. We focus on this transformation, examining particular types of Indian madras considered appropriate for this adaptation and the ways that these cloths are altered (i.e., cut and pulled), their relationship in color and design to ukara and to the other alubite cloths, and the significance of the triangular motif, alu, for depicting water spirits in masquerade performances

Erwartungsbildung über den Wahlausgang und ihr Einfluss auf die Wahlentscheidung

Erwartungen über den Wahlausgang haben einen festen Platz sowohl in Rational-Choice-Theorien des Wählerverhaltens als auch in stärker sozialpsychologisch orientierten Ansätzen. Die Bildung von Erwartungen und ihr Einfluss auf die Wahlentscheidung ist dabei jedoch ein noch relativ unerforschtes Gebiet. In diesem Beitrag werden anhand von Wahlstudien für Belgien, Österreich und Deutschland verschiedene Fragen der Erwartungsbildung und ihrer Auswirkungen untersucht. Zunächst wird die Qualität der Gesamterwartungen analysiert und verschiedene Faktoren identifiziert, die einen systematischen Einfluss auf die Erwartungsbildung haben. Im zweiten Schritt wenden wir uns den Einzelerwartungen über verschiedene Parteien und Koalitionen zu und finden eine moderate Verzerrung zugunsten der präferierten Parteien und Koalitionen. Dabei kann gezeigt werden, dass der Effekt des Wunschdenkens mit dem politischen Wissen und dem Bildungsgrad abnimmt. Schließlich werden in einem letzten Schritt zwei unterschiedliche Logiken für die Auswirkungen von Erwartungen getestet, das rationale Kalkül des koalitionsstrategischen Wählens zur Vermeidung der Stimmenvergeudung sowie der sozialpsychologisch begründete Bandwagon-Effekt. Das Ausmaß an politischem Wissen scheint dabei eine zentrale vermittelnde Variable zwischen den beiden Logiken zu sein

1861-08-01 Elisha B. Arable seeks the enlistment certificate of brother-in-law William C. Howard

https://digitalmaine.com/cw_me_3rd_regiment_corr/1077/thumbnail.jp

1861-08-05 Elisha Arable writes Governor Washburn for information about his relative William Howard

https://digitalmaine.com/cw_me_3rd_regiment_corr/1081/thumbnail.jp

Ethnobotanical knowledge of children in selected communities in plateau state, Nigeria: Drivers of children’s plant knowledge and the conservation implications for the future of biodiversity

The study was conducted to assess the ethnobotanical knowledge of primary school children in six selected communities of Plateau State, Nigeria and to determine the drivers of their knowledge including methods of knowledge acquisition and transmission. Six different rural communities from Plateau State Nigeria were  selected for the study; two schools in each community (total, 156 respondents). Data was collected through a mixed methods approach, using focus group plant identification exercise, picture identification activity, and oral interviews. Data was analyzed using simple descriptive statistics and frequencies. Results revealed that children had a relatively low knowledge of plants (30.3%), although this was mostly indigenous plants. A greater  proportion (40.6 %) of children held no ethnobotanical knowledge, 19.5 % could identify both exotic and  indigenous plants, while a further 9.6% identified only exotic species. Furthermore, the results revealed that parents, mostly mothers were the major transmitters of plant knowledge. We conclude that children’s ethnobotanical knowledge of plants was relatively low, and that there is a need to deliberately encourage local involvement of children in practical plant learning activities to help improve their plant knowledge if they are to become effective and knowledgeable custodians and stewards of our future biodiversity