Fermi blockade of the strong electron-phonon interaction in optimally doped high temperature superconductors

We study how manifestations of strong electron-phonon interaction (EPI) depend on the carrier concentration by solving the two-dimensional Holstein model for the spin-polarized fermions using an approximation free bold-line diagrammatic Monte Carlo (BDMC) method. We show that the strong EPI, obviously present at very small Fermion concentration, is masked by the Fermi blockade effects and Migdal's theorem to the extent that it manifests itself as moderate one at large carriers densities. Suppression of strong EPI fingerprints is in agreement with experimental observations in doped high temperature superconductors.

THE METHOD OF IMAGINARY MAP FOR HIGHER GEOGRAPHY LITERACY IN GENDER PERSPECTIVE

The objectives of this study were (1) to compare the differences in perceptual tendencies between male and female students, (2) to analyze the opportunities for the effectiveness of the application of the imaginary map method in the classroom from a gender perspective. The total population of this study was 46 students of Geography Education, Universitas Pendidikan Indonesia, with a gender ratio of 50:50. Data were obtained by using literature study and questionnaire methods, and data analysis used was quantitative and qualitative. From the research, data are acquired that there is a general tendency for the same perception between genders, but the difference is that female has a wider and different level of object perception. Although there was a majority of answers to object perception, about 40% of students have a completely different perception of an object. Therefore, to be applied to the classroom, the teacher can work around by providing an imaginary map with the shape of an object that has been given a bold line, so that the image given to students can be more purpose-driven kind of attention. Furthermore, it is necessary to examine the method of the imaginary map directly to students who currently studying map material in class, as well as the need to develop imaginary objects for maps of all countries.

Fermi Blockade of the Electron-phonon Interaction: Why Strong Coupling Effects May Not Be Seen in Optimally Doped High Temperature Superconductors

We study how manifestations of strong electron-phonon interaction (EPI) depend on the carrier concentration by solving the two-dimensional Holstein model for the spin-polarized fermions using an approximation free bold-line diagrammatic Monte Carlo (BDMC) method. We show that the strong EPI, obviously present at very small Fermion concentration, is masked by the Fermi blockade effects and Migdal's theorem to the extent that it manifests itself as moderate one at large carriers densities. Suppression of strong EPI fingerprints is in agreement with experimental observations in doped high temperature superconductors.

Beyond Diversity: Women, Scarification, and Yoruba Identity

On 18 March 1898 Okolu, an Ijesa man, accused Otunba of Italemo ward, Ondo of seizing and enslaving his sister Osun and his niece. Both mother and daughter, enslaved by the Ikale in 1894, had fled from their master in 1895, but as they headed toward Ilesa, the accused seized them. Osun claimed the accused forced her to become his wife, “hoe a farm,” and marked her daughter's face with one deep, bold line on each cheek. Otunba denied the slavery charge, claiming he only “rescued [Osun] from Soba who was taking her away [and] took her for wife.” Itoyimaki, a defense witness, supported the claim that Osun was not Otunba's slave. In his decision, Albert Erharhdt, the presiding British Commissioner, freed the captives and ordered the accused to pay a fine of two pounds. In addition to integrating Osun through marriage, the mark conferred on her daughter a standard feature of Ondo identity. Although this case came up late in the nineteenth century, it represents a trend in precolonial Yorubaland whereby marriages and esthetics served the purpose of ethnic incorporation.Studies on the roots of African ethnic identity consciousness have concentrated mostly on the activities of outsiders, usually Euro-American Christian missions, repatriated ex-slaves, and Muslims, whose ideas of nations as geocultural entities were applied to various African groups during the era of the slave trade and, more intensely, under colonialism. For instance, prior to the late nineteenth century, the people now called Yoruba were divided into multiple opposing ethnicities. Ethnic wars displaced millions of people, including about a million Yoruba-speakers deported as slaves to the Americas, Sierra Leone, and the central Sudan, mostly between the sixteenth and nineteenth centuries.