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https://www.readbyqxmd.com/read/29342178/chaos-and-multi-scroll-attractors-in-rcl-shunted-junction-coupled-jerk-circuit-connected-by-memristor
#1
Jun Ma, Ping Zhou, Bashir Ahmad, Guodong Ren, Chunni Wang
In this paper, a new four-variable dynamical system is proposed to set chaotic circuit composed of memristor and Josephson junction, and the dependence of chaotic behaviors on nonlinearity is investigated. A magnetic flux-controlled memristor is used to couple with the RCL-shunted junction circuit, and the dynamical behaviors can be modulated by changing the coupling intensity between the memristor and the RCL-shunted junction. Bifurcation diagram and Lyapunov exponent are calculated to confirm the emergence of chaos in the improved dynamical system...
2018: PloS One
https://www.readbyqxmd.com/read/29341759/crossover-from-classical-to-fermi-liquid-behavior-in-dense-plasmas
#2
Jérôme Daligault
We explore the crossover from classical plasma to quantum Fermi liquid behavior of electrons in dense plasmas. To this end, we analyze the evolution with density and temperature of the momentum lifetime of a test electron introduced in a dense electron gas. This allows us (1) to determine the boundaries of the crossover region in the temperature-density plane and to shed light on the evolution of scattering properties across it, (2) to quantify the role of the fermionic nature of electrons on electronic collisions across the crossover region, and (3) to explain how the concept of the Coulomb logarithm emerges at a high enough temperature but disappears at a low enough temperature...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341686/nonequilibrium-chromosome-looping-via-molecular-slip-links
#3
C A Brackley, J Johnson, D Michieletto, A N Morozov, M Nicodemi, P R Cook, D Marenduzzo
We propose a model for the formation of chromatin loops based on the diffusive sliding of molecular slip links. These mimic the behavior of molecules like cohesin, which, along with the CTCF protein, stabilize loops which contribute to organizing the genome. By combining 3D Brownian dynamics simulations and 1D exactly solvable nonequilibrium models, we show that diffusive sliding is sufficient to account for the strong bias in favor of convergent CTCF-mediated chromosome loops observed experimentally. We also find that the diffusive motion of multiple slip links along chromatin is rectified by an intriguing ratchet effect that arises if slip links bind to the chromatin at a preferred "loading site...
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341651/lattice-homotopy-constraints-on-phases-of-quantum-magnets
#4
Hoi Chun Po, Haruki Watanabe, Chao-Ming Jian, Michael P Zaletel
The Lieb-Schultz-Mattis (LSM) theorem and its extensions forbid trivial phases from arising in certain quantum magnets. Constraining infrared behavior with the ultraviolet data encoded in the microscopic lattice of spins, these theorems tie the absence of spontaneous symmetry breaking to the emergence of exotic phases like quantum spin liquids. In this work, we take a new topological perspective on these theorems, by arguing they originate from an obstruction to "trivializing" the lattice under smooth, symmetric deformations, which we call the "lattice homotopy problem...
September 22, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341648/thermal-transport-in-the-kitaev-model
#5
Joji Nasu, Junki Yoshitake, Yukitoshi Motome
In conventional insulating magnets, heat is carried by magnons and phonons. In contrast, when the magnets harbor a quantum spin liquid state, emergent quasiparticles from the fractionalization of quantum spins can carry heat. Here, we investigate unconventional thermal transport yielded by such exotic carriers, in both longitudinal and transverse components, for the Kitaev model, whose ground state is exactly shown to be a quantum spin liquid with fractional excitations described as itinerant Majorana fermions and localized Z_{2} fluxes...
September 22, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341288/lipid-and-nucleic-acid-chemistries-combining-the-best-of-both-worlds-to-construct-advanced-biomaterials
#6
REVIEW
Julie Baillet, Valérie Desvergnes, Aladin Hamoud, Laurent Latxague, Philippe Barthélémy
Hybrid synthetic amphiphilic biomolecules are emerging as promising supramolecular materials for biomedical and technological applications. Herein, recent progress in the field of nucleic acid based lipids is highlighted with an emphasis on their molecular design, synthesis, supramolecular properties, physicochemical behaviors, and applications in the field of health science and technology. In the first section, the design and the study of nucleolipids are in focus and then the glyconucleolipid family is discussed...
January 17, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29341200/human-agency-in-disaster-planning-a-systems-approach
#7
John Hamer Powell, Michael Hammond, Albert Chen, Navonil Mustafee
Current approaches to risk management place insufficient emphasis on the system knowledge available to the assessor, particularly in respect of the dynamic behavior of the system under threat, the role of human agents (HAs), and the knowledge available to those agents. In this article, we address the second of these issues. We are concerned with a class of systems containing HAs playing a variety of roles as significant system elements-as decisionmakers, cognitive agents, or implementers-that is, human activity systems...
January 16, 2018: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/29341122/impacts-of-methane-on-carbon-dioxide-storage-in-brine-formations
#8
Mohamad R Soltanian, Mohammad A Amooie, David R Cole, Thomas H Darrah, David E Graham, Susan M Pfiffner, Tommy J Phelps, Joachim Moortgat
In the context of geological carbon sequestration (GCS), carbon dioxide (CO2 ) is often injected into deep formations saturated with a brine that may contain dissolved light hydrocarbons, such as methane (CH4 ). In this multicomponent multiphase displacement process, CO2 competes with CH4 in terms of dissolution, and CH4 tends to exsolve from the aqueous into a gaseous phase. Because CH4 has a lower viscosity than injected CO2 , CH4 is swept up into a 'bank' of CH4 -rich gas ahead of the CO2 displacement front...
January 16, 2018: Ground Water
https://www.readbyqxmd.com/read/29340937/association-between-electronic-medical-record-implementation-of-default-opioid-prescription-quantities-and-prescribing-behavior-in-two-emergency-departments
#9
M Kit Delgado, Frances S Shofer, Mitesh S Patel, Scott Halpern, Christopher Edwards, Zachary F Meisel, Jeanmarie Perrone
No abstract text is available yet for this article.
January 16, 2018: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/29340784/a-new-flesh-fly-species-diptera-sarcophagidae-parasitic-on-leptodactylid-frogs
#10
Pablo Ricardo Mulieri, Eduardo Federico Schaefer, Marta Inés Duré, Cynthya Elizabeth González
Here we describe a new species of sarcophagid fly reared from larvae found feeding on three species of leptodactylid frogs collected in subtropical Corrientes Province in northeastern Argentina. Our species description is based on adult male and female external morphology and genitalia. Adult males and females of the new species were associated with certainty because all specimens studied were reared from single clutches of larvae on each of three infested frogs. Thus, adult males and females reared from each clutch were siblings that emerged almost simultaneously...
January 17, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29340594/keratan-sulphate-a-complex-glycosaminoglycan-with-unique-functional-capability
#11
Bruce Caterson, James Melrose
From an evolutionary perspective keratan sulphate (KS) is the newest glycosaminoglycan (GAG) but the least understood. KS is a sophisticated molecule with a diverse structure, and unique functional roles continue to be uncovered for this GAG. The cornea is the richest tissue source of KS in the human body but the central and peripheral nervous systems also contain significant levels of KS and a diverse range of KS-proteoglycans with essential functional roles. KS also displays important cell regulatory properties in epithelial and mesenchymal tissues and in bone and in tumour development of diagnostic and prognostic utility...
January 11, 2018: Glycobiology
https://www.readbyqxmd.com/read/29340526/simulating-the-behavior-of-patients-who-leave-a-public-hospital-emergency-department-without-being-seen-by-a-physician-a-cellular-automaton-and-agent-based-framework
#12
Milad Yousefi, Moslem Yousefi, F S Fogliatto, R P M Ferreira, J H Kim
The objective of this study was to develop an agent based modeling (ABM) framework to simulate the behavior of patients who leave a public hospital emergency department (ED) without being seen (LWBS). In doing so, the study complements computer modeling and cellular automata (CA) techniques to simulate the behavior of patients in an ED. After verifying and validating the model by comparing it with data from a real case study, the significance of four preventive policies including increasing number of triage nurses, fast-track treatment, increasing the waiting room capacity and reducing treatment time were investigated by utilizing ordinary least squares regression...
January 11, 2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29340409/dynamics-of-3d-carcinoma-cell-invasion-into-aligned-collagen
#13
Arja Ray, Rachel K Morford, Nima Ghaderi, David J Odde, Paolo P Provenzano
Carcinoma cells frequently expand and invade from a confined lesion, or multicellular clusters, into and through the stroma on the path to metastasis, often with an efficiency dictated by the architecture and composition of the microenvironment. Specifically, in desmoplastic carcinomas such as those of the breast, aligned collagen tracks provide contact guidance cues for directed cancer cell invasion. Yet, the evolving dynamics of this process of invasion remains poorly understood, in part due to difficulties in continuously capturing both spatial and temporal heterogeneity and progression to invasion in experimental systems...
January 17, 2018: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/29339938/understanding-cancer-survivors-information-needs-and-information-seeking-behaviors-for-complementary-and-alternative-medicine-from-short-to-long-term-survival-a-mixed-methods-study
#14
Lou Ann Scarton, Guilherme Del Fiol, Ingrid Oakley-Girvan, Bryan Gibson, Robert Logan, T Elizabeth Workman
Objective: The research examined complementary and alternative medicine (CAM) information-seeking behaviors and preferences from short- to long-term cancer survival, including goals, motivations, and information sources. Methods: A mixed-methods approach was used with cancer survivors from the "Assessment of Patients' Experience with Cancer Care" 2004 cohort. Data collection included a mail survey and phone interviews using the critical incident technique (CIT)...
January 2018: Journal of the Medical Library Association: JMLA
https://www.readbyqxmd.com/read/29339935/dietetic-interns-perceptions-and-use-of-evidence-based-practice-an-exploratory-study
#15
Rachel J Hinrichs
Objective: This study explored dietetic interns' perceptions and knowledge of evidence-based practice (EBP), their use and observation of EBP principles during their clinical rotations, and their intentions to use EBP in their careers. Methods: A mixed methods design combining a survey and focus group was employed. Dietetic interns (n=16) from a large Midwestern university were recruited in person and via email to participate in the survey, focus group, or both...
January 2018: Journal of the Medical Library Association: JMLA
https://www.readbyqxmd.com/read/29338610/cns-side-effects-of-immune-checkpoint-inhibitors-preclinical-models-genetics-and-multimodality-therapy
#16
Gwendolyn J McGinnis, Jacob Raber
Following cancer treatment, patients often report behavioral and cognitive changes. Novel cancer immunotherapeutics have the potential to produce sustained cancer survivorship, meaning patients will live longer with the side effects of treatment. Given the role of inflammatory pathways in mediating behavioral and cognitive impairments seen in cancer, we aim in this review to discuss emerging evidence for the contribution of immune checkpoint blockade to exacerbate these CNS effects. We discuss ongoing studies regarding the ability of immune checkpoint inhibitors to reach the brain and how treatment responses to checkpoint inhibitors may be modulated by genetic factors...
September 2017: Immunotherapy
https://www.readbyqxmd.com/read/29338184/design-of-ph-sensitive-nanovesicles-via-cholesterol-analogue-incorporation-for-improving-in-vivo-delivery-of-chemotherapeutics
#17
Lina Liang, Jun Fu, Liyan Qiu
pH-responsive polymersomes have emerged as promising nanocarriers for antitumor drugs to realize their fast release and action in weak acidic microenvironment of tumor cells. Herein, however, we designed a remarkably pH-responsive polymersome self-assembled from amphiphilic benzimidazole-based polyphosphazenes via the incorporation of cholesteryl hemisuccinate (CholHS), a type of cholesteric molecule, into the polymersome bilayers to inhibit the drug release during blood circulation. Actually, unwanted premature drug leakage before arriving at acidic tumor site has become a serious problem for polymersomes encapsulating water-soluble drugs, especially when the drug-loading is at a high level, thus limiting the therapeutic efficacy...
January 17, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29338020/autonomic-stress-reactivity-and-craving-in-individuals-with-problematic-internet-use
#18
Tania Moretta, Giulia Buodo
The link between autonomic stress reactivity and subjective urge/craving has been less systematically examined in behavioral addictions (i.e. problematic Internet use) than in substance use disorders. The present study investigated whether problematic Internet users (PU) show enhanced autonomic stress reactivity than non-PU, indexed by lower Heart Rate Variability (HRV) and higher Skin Conductance Level (SCL) reactivity during the Trier Social Stress Test (TSST), whether greater reactivity is related to stronger Internet craving, and whether problematic Internet usage is associated with some dysfunctional psychological features...
2018: PloS One
https://www.readbyqxmd.com/read/29337847/hiv-care-continuum-disparities-among-bisexual-black-men-and-the-mediating-effect-of-psychosocial-co-morbidities
#19
M Reuel Friedman, Jordan M Sang, Leigh A Bukowski, Derrick D Matthews, Lisa A Eaton, H Fisher Raymond, Ron Stall
INTRODUCTION: Differences across the HIV care continuum between men who have sex with men and women (MSMW) and men who have sex with men only (MSMO) are emerging in recent literature but have not been comprehensively documented among Black MSM. Although MSMW have lower HIV prevalence than MSMO, they are more likely to be HIV-positive unaware and be virally unsuppressed. Explanatory factors for these differences have not previously been assessed. METHODS: Between 2014-2016, we surveyed sexually active Black MSM ≥18 years old at Black Gay Pride events in six U...
January 15, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29337402/effect-of-length-of-dental-resident-clinical-rotations-on-patient-behavior
#20
Agnes Lau
AIM: The purpose of this retrospective chart review study was to determine if the length of residents' comprehensive dental care rotations in a general practice residency affected late cancellations, broken appointments, completion of treatment, timeliness of recall visits, emergency visits, and the need for redo of restorations and prostheses. METHODS: Patients who presented for comprehensive care from 2010 to 2013, during which residents had 3- to 4-month dental clinic rotations, comprised Group 1, and patients who presented for comprehensive care from 2013 to 2016, during which residents had 11-month dental clinic rotations, comprised Group 2...
January 16, 2018: Special Care in Dentistry
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