Spin-polarized imaging of strongly interacting fermions in the ferrimagnetic state of Weyl candidate CeBi

CeBi has an intricate magnetic phase diagram whose fully-polarized state has recently been suggested as a Weyl semimetal, though the role of $f$ states in promoting strong interactions has remained elusive. Here we focus on the less-studied, but also time-reversal symmetry-breaking ferrimagnetic phase of CeBi, where our density functional theory (DFT) calculations predict additional Weyl nodes near the Fermi level $E_\mathrm{F}$. We use spin-polarized scanning tunneling microscopy and spectroscopy to image the surface ferrimagnetic order on the itinerant Bi $p$ states, indicating their orbital hybridization with localized Ce $f$ states. We observe suppression of this spin-polarized signature at $E_\mathrm{F}$, coincident with a Fano line shape in the conductance spectra, suggesting the Bi $p$ states partially Kondo screen the $f$ magnetic moments, and this $p-f$ hybridization causes strong Fermi-level band renormalization. The $p$ band flattening is supported by our quasiparticle interference (QPI) measurements, which also show band splitting in agreement with DFT, painting a consistent picture of a strongly interacting magnetic Weyl semimetal

The accessible chromatin landscape of the human genome

DNaseI hypersensitive sites (DHSs) are markers of regulatory DNA and have underpinned the discovery of all classes of cis-regulatory elements including enhancers, promoters, insulators, silencers, and locus control regions. Here we present the first extensive map of human DHSs identified through genome-wide profiling in 125 diverse cell and tissue types. We identify ~2.9 million DHSs that encompass virtually all known experimentally-validated cis-regulatory sequences and expose a vast trove of novel elements, most with highly cell-selective regulation. Annotating these elements using ENCODE data reveals novel relationships between chromatin accessibility, transcription, DNA methylation, and regulatory factor occupancy patterns. We connect ~580,000 distal DHSs with their target promoters, revealing systematic pairing of different classes of distal DHSs and specific promoter types. Patterning of chromatin accessibility at many regulatory regions is choreographed with dozens to hundreds of co-activated elements, and the trans-cellular DNaseI sensitivity pattern at a given region can predict cell type-specific functional behaviors. The DHS landscape shows signatures of recent functional evolutionary constraint. However, the DHS compartment in pluripotent and immortalized cells exhibits higher mutation rates than that in highly differentiated cells, exposing an unexpected link between chromatin accessibility, proliferative potential and patterns of human variation

The accessible chromatin landscape of the human genome

DNaseI hypersensitive sites (DHSs) are markers of regulatory DNA and have underpinned the discovery of all classes of cis-regulatory elements including enhancers, promoters, insulators, silencers, and locus control regions. Here we present the first extensive map of human DHSs identified through genome-wide profiling in 125 diverse cell and tissue types. We identify ~2.9 million DHSs that encompass virtually all known experimentally-validated cis-regulatory sequences and expose a vast trove of novel elements, most with highly cell-selective regulation. Annotating these elements using ENCODE data reveals novel relationships between chromatin accessibility, transcription, DNA methylation, and regulatory factor occupancy patterns. We connect ~580,000 distal DHSs with their target promoters, revealing systematic pairing of different classes of distal DHSs and specific promoter types. Patterning of chromatin accessibility at many regulatory regions is choreographed with dozens to hundreds of co-activated elements, and the trans-cellular DNaseI sensitivity pattern at a given region can predict cell type-specific functional behaviors. The DHS landscape shows signatures of recent functional evolutionary constraint. However, the DHS compartment in pluripotent and immortalized cells exhibits higher mutation rates than that in highly differentiated cells, exposing an unexpected link between chromatin accessibility, proliferative potential and patterns of human variation

Alban Berg's Violin Concerto: A Short History of its Reception

Since its world premiere in 1936, Alban Berg's Violin Conce1io has retained a stable place in the repertoire, an unusual feat for a work based on twelve-tone principles. It is all the more remarkable to note its early success despite unfavorable conditions surround ing its first performances. Though Berg (1885-1 935) had already been recognized for his compositions internationally, this work (perhaps along with the event of his death before the premiere) accelerated his worldwide recognition as an important contributor and innovator of contemporary music. Today it is viewed as the composer's most popular work, combi ning serialism with Mahlerian romanticism. As a whole, the Violin Concerto deviates from Berg's usual style in a number of areas, including genre, form, and tonal organization, as well as the inspiration and motives for accepting its commission. While its emotionally-charged program and romantic approach assuredly contributed toward its early success, it is d ifficult neve1iheless to justify its popularity as a work that seems to devote itself to pacifying twelve-tone technique. Throughout this essay I will examine various historic critical evaluations of the work and argue why it has been publicly well-received in spite of its predominant, idiosyncratic use of serial techniques. I will focus primarily on its first three performances along with their reception and compare these initial reactions with more recent viewpoints.Nathan CanfieldCunningham Memorial Library, Terre Haute, Indiana State Universit

HSP Judges: Culture and History in Comestor\u27s Historia Iudicum

As participants within the Historia Scholastica Project, ongoing since August 2011, our project joins with the larger goal of making a transcription and English translation of Boise State University’s copy of Peter Comestor’s Historia Scholastica accessible to a general English-speaking audience. Throughout the 2015-2016 academic year, we will have translated 206 lines of the “Judges” section. The goal of this translation is to preserve the fundamental ideas that Comestor conveyed through his vocabulary and grammar in our English translation while making it presentable to a contemporary English audience. Our cohort of Latin students has begun the process of transcription, textual comparison, and translation of the book of Judges, referring to Adriano Cappelli’s The Elements of Abbreviation in Medieval Latin Paleography for a transcription reference and comparing our copy with other extant texts, the Patrologia Latinae 198 and the 1543 Lugduni transcription. We have begun to identify Comestor’s sources and influences, such as Jerome and Josephus, exercising comparisons between the authors. The textual comparisons made with our research will set the stage for further analysis of the BSU manuscript within manuscript lineages of Comestor’s crucial medieval work

HSP Judges: A Template for Community Collaboration

The Fall 2016 - Spring 2017 Historia Scholastica Judges group, a team dedicated to the translation of a Medieval Latin document, explored electronic venues to make the project bridge communities across physical space through an online collaboration tool. We evaluated commonly-available platforms to select a tool with sufficient potential to facilitate future online collaborative efforts with community partners. Throughout the Spring 2017 semester, we collaborated via the platform to judge its performance. We agreed on the continued use of Google related applications, including Google Docs and Hangout. In the process, we encountered multiple issues: exigent circumstances, including snow days, classmates overseas, and former classmates likely not using their university E-mails caused many delays in the class schedule and difficulty in communication. Communication between Historia Scholastica Project (HSP) team members was frequently unclear and hangouts were difficult to conduct, with not everyone online simultaneously. The implementation of Google as a collaborative tool within HSP is on-going, initiated on a two-month trial. Results will be evaluated on criteria of communication and scheduling, with a bearing on future HSP collaborations

Preparation and Characterization of a Hydrophobic Metal–Organic Framework Membrane Supported on a Thin Porous Metal Sheet

A hydrophobic metal–organic framework (MOF) UiO-66-CH₃ is prepared and its solvothermal stability is investigated in comparison to UiO-66. It is confirmed that the MOF stability is enhanced by introduction of the two methyl groups, while the water adsorption is reduced. Given its hydrophobicity and stability, UiO-66-CH₃ is proposed as an attractive membrane material for gas separation under moisture conditions. The UiO-66-CH₃ membrane is prepared on a 50 μm thin porous Ni support sheet for the first time by use of a secondary growth method. It is found that uniform seed coating on the support is necessary to form a continuous membrane. In addition to growth time and temperature, the presence of a modulator in the growth solution is found to be useful for controlling hydrothermal membrane growth on the seeded support. A dense, intergrown membrane layer is formed by 24 h growth over a temperature range from 120 to 160 °C. The membrane surface comprises 500 nm octahedral crystals, which are supposed to grow out of the original 100 nm spherical seeding crystals. The separation characteristics of resulting membranes are tested with pure CO₂, air, CO₂/air mixture, and humid CO₂/air mixture. CO₂ permeance as high as 1.9 × 10^–6 mol/(m² s Pa) at 31 °C is obtained. Unlike the hydrophilic zeolite membranes, CO₂ permeation through this membrane is not blocked by the presence of water vapor in the feed gas. The results suggest that this MOF is a promising membrane material worth further investigation for separation of CO₂ and other small molecules from humid gas mixtures