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https://www.readbyqxmd.com/read/28453300/psychiatry-sex-and-science-the-making-of-adolescent-motherhood-in-southern-brazil
#1
Dominique P Béhague
Research linking teen motherhood to psychoneurodevelopmental causes and pathologies has proliferated in the past two decades. In Brazil, a psychodevelopmental project of teen motherhood has gained traction despite many experts' long-standing commitment to psychodynamic psychiatry and social epidemiology, generating epistemic tension rather than substitution. Drawing on historical ethnography conducted in Southern Brazil, I explore how this project materialized through the co-production of epistemic struggles, remedial interventions, and ontological politics...
April 28, 2017: Medical Anthropology
https://www.readbyqxmd.com/read/28448131/silk-resin-with-hydrated-dual-chemical-physical-crosslinks-achieves-high-strength-and-toughness
#2
Keiji Numata, Nao Ifuku, Hiroyasu Masunaga, Takaaki Hikima, Takamasa Sakai
Native silk fibers are known to demonstrate excellent mechanical properties such as high strength and ductility. However, regenerated silk material has not yet been used as a tough structural material in our everyday life. To recreate the mechanical properties with regenerated silk material, the network structure and hydration state of silk materials are studied and optimized in this study. This is the first to demosntrate the effect of chemial and physical crosslinks in hydrated and dehydrated silk materials, namely, silk hydrogels and resins...
April 27, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28446330/automated-identification-of-relevant-frontier-orbitals-for-chemical-compounds-and-processes
#3
Christopher J Stein, Markus Reiher
Quantum-chemical multi-configurational methods are required for a proper description of static electron correlation, a phenomenon inherent to the electronic structure of molecules with multiple (near-)degenerate frontier orbitals. Here, we review how a property of these frontier orbitals, namely the entanglement entropy is related to static electron correlation. A subset of orbitals, the so-called active orbital space is an essential ingredient for all multi-configurational methods. We proposed an automated selection of this active orbital space, that would otherwise be a tedious and error prone manual procedure, based on entanglement measures...
April 26, 2017: Chimia
https://www.readbyqxmd.com/read/28443878/influence-of-high-energy-electron-irradiation-on-the-network-structure-of-gelatin-hydrogels-as-investigated-by-small-angle-x-ray-scattering-saxs
#4
Emilia I Wisotzki, Paolo Tempesti, Emiliano Fratini, Stefan G Mayr
The impact of high energy crosslinking on the network structure of gelatin hydrogels was investigated in comparison to physically entangled gels by small-angle X-ray scattering (SAXS). Physically entangled gelatin of increasing concentration exhibited a nearly constant correlation length of several nanometers. These gels had scattering behavior close to that of polymer coils swollen in a good solvent, as evidenced by the Porod exponent of 1.8. The mass fractal dimension decreased towards 1, indicating increased formation of semiflexible gelatin triple helices and rod-like structures as a function of the gelatin concentration...
April 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28443624/fundamental-limits-of-repeaterless-quantum-communications
#5
Stefano Pirandola, Riccardo Laurenza, Carlo Ottaviani, Leonardo Banchi
Quantum communications promises reliable transmission of quantum information, efficient distribution of entanglement and generation of completely secure keys. For all these tasks, we need to determine the optimal point-to-point rates that are achievable by two remote parties at the ends of a quantum channel, without restrictions on their local operations and classical communication, which can be unlimited and two-way. These two-way assisted capacities represent the ultimate rates that are reachable without quantum repeaters...
April 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28442789/elastic-turbulence-in-entangled-semi-dilute-dna-solutions-measured-with-optical-coherence-tomography-velocimetry
#6
A V Malm, T A Waigh
The flow instabilities of solutions of high molecular weight DNA in the entangled semi-dilute concentration regime were investigated using optical coherence tomography velocimetry, a technique that provides high spatial (probe volumes of 3.4 pL) and temporal resolution (sub μs) information on the flow behaviour of complex fluids in a rheometer. The velocity profiles of the opaque DNA solutions (high and low salt) were measured as a function of the distance across the gap of a parallel plate rheometer, and their evolution over time was measured...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442725/physical-links-defining-and-detecting-inter-chain-entanglement
#7
Michele Caraglio, Cristian Micheletti, Enzo Orlandini
Fluctuating filaments, from densely-packed biopolymers to defect lines in structured fluids, are prone to become interlaced and form intricate architectures. Understanding the ensuing mechanical and relaxation properties depends critically on being able to capture such entanglement in quantitative terms. So far, this has been an elusive challenge. Here we introduce the first general characterization of non-ephemeral forms of entanglement in linear curves by introducing novel descriptors that extend topological measures of linking from close to open curves...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442724/entanglement-distribution-in-multi-particle-systems-in-terms-of-unified-entropy
#8
Yu Luo, Fu-Gang Zhang, Yongming Li
We investigate the entanglement distribution in multi-particle systems in terms of unified (q, s)-entropy. We find that for any tripartite mixed state, the unified (q, s)-entropy entanglement of assistance follows a polygamy relation. This polygamy relation also holds in multi-particle systems. Furthermore, a generalized monogamy relation is provided for unified (q, s)-entropy entanglement in the multi-qubit system.
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28441644/management-of-guidewire-entrapment-with-laser-atherectomy
#9
Judit Karacsonyi, Jose R Martinez-Parachini, Barbara A Danek, Aris Karatasakis, Imre Ungi, Subhash Banerjee, Emmanouil S Brilakis
A 62-year-old man was referred for percutaneous coronary intervention of a severe circumflex lesion. The guidewire became entangled in the previously implanted left anterior descending artery stent. The left main was engaged with a second guide catheter, followed by balloon dilations, various microcatheters, and laser atherectomy. The wire eventually fractured without protruding into the aorta. The circumflex lesion was stented with two stents, followed by left main stenting that covered the fragment. Caution should be used when wiring through stents; wire fracture can be treated with stent implantation, as long as the wire fragment does not protrude into the aorta...
May 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28441482/the-value-of-nmr-parameters-and-dft-calculations-for-quantum-information-processing-utilizing-phosphorus-heterocycles
#10
Jessica Boreli Dos Reis Lino, Eduardo P Rocha, Teodorico Castro Ramalho
Quantum computing is the field of science that uses quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. The fundamental information unit used in quantum computing is the quantum bit or qubit. It is well-known that quantum computers could theoretically be able to solve problems much more quickly than any classical computers. Currently, the first and still the most successful implementations of quantum information processing (QIP) have been based on nuclear spins in liquids...
April 25, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28440789/corrigendum-one-step-quantum-key-distribution-based-on-epr-entanglement
#11
Jian Li, Na Li, Lei-Lei Li, Tao Wang
No abstract text is available yet for this article.
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28433884/synthetic-control-of-the-size-shape-and-polydispersity-of-anisotropic-silica-colloids
#12
Ryan P Murphy, Kunlun Hong, Norman J Wagner
The microstructure and rheological properties of colloidal suspensions depend on particle size and shape. This work aims to further control the size, shape, and polydispersity of anisotropic silica colloids, to reduce particle size, and to provide additional mechanistic insights on a prevalent, water-in-oil emulsion synthesis method. Key findings show that the dimensions of anisotropic silica particles can be systematically varied by approximately fivefold, with a limiting minimum particle size (D≈60nm, L≈300nm) obtained from emulsions with excess polyvinylpyrrolidone (PVP) and sodium citrate...
April 11, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28433166/chitosan-graphene-oxide-films-and-co2-dried-porous-aerogel-microspheres-interfacial-interplay-and-stability
#13
Sana Frindy, Ana Primo, Hamid Ennajih, Abou El Kacem Qaiss, Rachid Bouhfid, Mohamed Lahcini, El Mokhtar Essassi, Hermenegildo Garcia, Abdelkrim El Kadib
The intimate interplay of chitosan (CS) and graphene oxide (GO) in aqueous acidic solution has been explored to design upon casting, nanostructured "brick-and-mortar" films (CS-GO-f) and by acidic-to-basic pH inversion, porous CO2-dried aerogel microspheres (CS-GO-m). Owing to the presence of oxygenated functional groups in GO, good-quality crack-free hybrid films were obtained. Mechanical properties were improved independently of the GO content and it was found that a 20wt% loading affords hybrid film characterized with a Young modulus three times superior to that reached with the same loading of layered clay...
July 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28431743/opportunistic-sampling-to-quantify-plastics-in-the-diet-of-unfledged-black-legged-kittiwakes-rissa-tridactyla-northern-fulmars-fulmarus-glacialis-and-great-cormorants-phalacrocorax-carbo
#14
Heidi Acampora, Stephen Newton, Ian O'Connor
Seabirds can interact with marine litter, mainly by entanglement or ingestion. The ingestion of plastics can lead to starvation or physical damage to the digestive tract. For chicks, it could additionally lead to reduced growth, affecting survival and fledging. This study quantified the ingestion of plastics by seabird chicks via an opportunistic sampling strategy. When ringing is carried out at colonies, birds may spontaneously regurgitate their stomach contents due to the stress or as a defence mechanism...
April 18, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28431467/influence-of-glycosylation-on-interfacial-properties-of-recombinant-mucins-adsorption-surface-forces-and-friction
#15
Junxue An, Chunsheng Jin, Andra Dėdinaitė, Jan Holgersson, Niclas G Karlsson, Per M Claesson
Interfacial properties of two brush-with-anchor mucins, C-P55 and C-PSLex, have been investigated at the aqueous solution/poly(methyl methacrylate) (PMMA) interface. Both are recombinant mucin-type fusion proteins, produced by fusing the glycosylated mucin part of P-selectin glycoprotein ligand-1 (PSLG-1) to the Fc part of a mouse immunoglobulin in two different cells. They are mainly expressed as dimers upon production. Analysis of the O-glycans shows that the C-PSLex mucin has the longer and more branched side chains, but C-P55 has slightly higher sialic acid content...
April 26, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28430517/small-particle-driven-chain-disentanglements-in-polymer-nanocomposites
#16
Erkan Senses, Siyam M Ansar, Christopher L Kitchens, Yimin Mao, Suresh Narayanan, Bharath Natarajan, Antonio Faraone
Using neutron spin-echo spectroscopy, x-ray photon correlation spectroscopy, and bulk rheology, we studied the effect of particle size on the single-chain dynamics, particle mobility, and bulk viscosity in athermal polyethylene oxide-gold nanoparticle composites. The results reveal a ≈25% increase in the reptation tube diameter with the addition of nanoparticles smaller than the entanglement mesh size (≈5  nm), at a volume fraction of 20%. The tube diameter remains unchanged in the composite with larger (20 nm) nanoparticles at the same loading...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430506/demonstration-of-multisetting-one-way-einstein-podolsky-rosen-steering-in-two-qubit-systems
#17
Ya Xiao, Xiang-Jun Ye, Kai Sun, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Einstein-Podolsky-Rosen (EPR) steering describes the ability of one party to remotely affect another's state through local measurements. One of the most distinguishable properties of EPR steering is its asymmetric aspect. Steering can work in one direction but fail in the opposite direction. This type of one-way steering, which is different from the symmetry concepts of entanglement and Bell nonlocality, has garnered much interest. However, an experimental demonstration of genuine one-way EPR steering in the simplest scenario, i...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430480/superconducting-grid-bus-surface-code-architecture-for-hole-spin-qubits
#18
Simon E Nigg, Andreas Fuhrer, Daniel Loss
We present a scalable hybrid architecture for the 2D surface code combining superconducting resonators and hole-spin qubits in nanowires with tunable direct Rashba spin-orbit coupling. The backbone of this architecture is a square lattice of capacitively coupled coplanar waveguide resonators each of which hosts a nanowire hole-spin qubit. Both the frequency of the qubits and their coupling to the microwave field are tunable by a static electric field applied via the resonator center pin. In the dispersive regime, an entangling two-qubit gate can be realized via a third order process, whereby a virtual photon in one resonator is created by a first qubit, coherently transferred to a neighboring resonator, and absorbed by a second qubit in that resonator...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430479/interfacing-superconducting-qubits-and-single-optical-photons-using-molecules-in-waveguides
#19
Sumanta Das, Vincent E Elfving, Sanli Faez, Anders S Sørensen
We propose an efficient light-matter interface at optical frequencies between a single photon and a superconducting qubit. The desired interface is based on a hybrid architecture composed of an organic molecule embedded inside an optical waveguide and electrically coupled to a superconducting qubit placed near the outside surface of the waveguide. We show that high fidelity, photon-mediated, entanglement between distant superconducting qubits can be achieved with incident pulses at the single photon level. Such a low light level is highly desirable for achieving a coherent optical interface with superconducting qubit, since it minimizes decoherence arising from the absorption of light...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430460/subradiance-via-entanglement-in-atoms-with-several-independent-decay-channels
#20
Martin Hebenstreit, Barbara Kraus, Laurin Ostermann, Helmut Ritsch
Spontaneous emission of atoms in free space is modified by the presence of other atoms in close vicinity inducing collective super- and subradiance. For two nearby atoms with a single decay channel the entangled antisymmetric superposition state of the two single excited states will not decay spontaneously. No such excited two-atom dark state exists, if the excited state has two independent optical decay channels of different frequencies or polarizations. However, we show that for an excited atomic state with N-1 independent spontaneous decay channels one can find a highly entangled N-particle dark state, which completely decouples from the vacuum radiation field...
April 7, 2017: Physical Review Letters
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