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https://www.readbyqxmd.com/read/29655338/emergence-of-landauer-transport-from-quantum-dynamics-a-model-hamiltonian-approach
#1
Partha Pratim Pal, S Ramakrishna, Tamar Seideman
The Landauer expression for computing current-voltage characteristics in nanoscale devices is efficient but not suited to transient phenomena and a time-dependent current because it is applicable only when the charge carriers transition into a steady flux after an external perturbation. In this article, we construct a very general expression for time-dependent current in an electrode-molecule-electrode arrangement. Utilizing a model Hamiltonian (consisting of the subsystem energy levels and their electronic coupling terms), we propagate the Schrödinger wave function equation to numerically compute the time-dependent population in the individual subsystems...
April 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29653401/antibiotics-and-antibiotic-resistance-genes-in-global-lakes-a-review-and-meta-analysis
#2
REVIEW
Yuyi Yang, Wenjuan Song, Hui Lin, Weibo Wang, Linna Du, Wei Xing
Lakes are an important source of freshwater, containing nearly 90% of the liquid surface fresh water worldwide. Long retention times in lakes mean pollutants from discharges slowly circulate around the lakes and may lead to high ecological risk for ecosystem and human health. In recent decades, antibiotics and antibiotic resistance genes (ARGs) have been regarded as emerging pollutants. The occurrence and distribution of antibiotics and ARGs in global freshwater lakes are summarized to show the pollution level of antibiotics and ARGs and to identify some of the potential risks to ecosystem and human health...
April 10, 2018: Environment International
https://www.readbyqxmd.com/read/29652816/the-emergency-medical-system-in-greece-opening-aeolus-bag-of-winds
#3
Ourania S Kotsiou, David S Srivastava, Panagiotis Kotsios, Aristomenis K Exadaktylos, Konstantinos I Gourgoulianis
An Emergency Medical Service (EMS) system must encompass a spectrum of care, with dedicated pre-hospital and in-hospital medical facilities. It has to be organised in such a way as to include all necessary services—such as triage accurate initial assessment, prompt resuscitation, efficient management of emergency cases, and transport to definitive care. The global economic downturn has had a direct effect on the health sector and poses additional threats to the healthcare system. Greece is one of the hardest-hit countries...
April 13, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29652664/alcohol-use-in-adolescence-5-years-admissions-at-a-pediatric-emergency-department
#4
Marlene Rodrigues, Teresa Pontes, Juliana Almeida, Alexandra Estrada, Susana Carvalho
Objective To characterize the profile and pattern of alcohol consumption in adolescents, admitted with acute alcoholic intoxication (AAI) at a pediatric emergency department of North Portugal. Methods Retrospective descriptive study of adolescents aged between 10 and 17 years, admitted with AAI between 2012 and 2016. The following variables were evaluated: age, gender, drinking context, quantity and type of alcohol, Glasgow Coma Scale (GCS), previous episodes, associated injuries, transport to the emergency department, other drug consumption, blood alcohol level (BAL), blood glucose level, treatment and orientation...
April 13, 2018: International Journal of Adolescent Medicine and Health
https://www.readbyqxmd.com/read/29651990/non-fermi-liquids-in-oxide-heterostructures
#5
Susanne Stemmer, S James Allen
Understanding the anomalous transport properties of strongly correlated materials is one of the most formidable challenges in condensed matter physics. For example, one encounters metal-insulator transitions, deviations from Landau Fermi liquid behavior, longitudinal and Hall scattering rate separation, a pseudogap phase, and bad metal behavior. These properties have been studied extensively in bulk materials, such as the unconventional superconductors and heavy fermion systems. Oxide heterostructures have recently emerged as new platforms to probe, control, and understand strong correlation phenomena...
April 13, 2018: Reports on Progress in Physics
https://www.readbyqxmd.com/read/29651626/current-topics-in-the-management-of-acute-traumatic-spinal-cord-injury
#6
Christopher D Shank, Beverly C Walters, Mark N Hadley
Acute traumatic spinal cord injury (SCI) affects more than 250,000 people in the USA, with approximately 17,000 new cases each year. It continues to be one of the most significant causes of trauma-related morbidity and mortality. Despite the introduction of primary injury prevention education and vehicle safety devices, such as airbags and passive restraint systems, traumatic SCI continues to have a substantial impact on the healthcare system. Over the last three decades, there have been considerable advancements in the management of patients with traumatic SCI...
April 12, 2018: Neurocritical Care
https://www.readbyqxmd.com/read/29651116/angular-flux-creep-contributions-in-yba-2-cu-3-o-7-%C3%AE-nanocomposites-from-electrical-transport-measurements
#7
F Vallès, A Palau, V Rouco, B Mundet, X Obradors, T Puig
The shape of the electric-field-current-density (E-J) curve is determined by flux pinning and also by dynamics of vortices. Here, we propose a novel methodology to study the normalized flux creep rate S in YBa2 Cu3 O7-δ measured from E-J curves obtained by electrical transport measurements that provides a fast and versatile way to foresee the flux magnetic relaxation in films and disentangle angular flux creep contributions by the scaling of the isotropic contribution of S. After a detailed comparison of various pristine and nanocomposite films with differentiated nanostructures, we focus on the roles that intrinsic pinning and stacking faults (YBa2 Cu4 O8 -intergrowths) play when the magnetic field is applied parallel to the superconducting CuO2 planes...
April 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29650854/-a-case-of-hyperammonemia-induced-by-chemotherapy-with-5-fluorouracil-for-metastatic-colon-cancer
#8
Shinji Tokuyama, Mutsumi Fukunaga, Ken Konishi, Shoko Honda, Ryohei Yukimoto, Aoi Okamoto, Akina Saito, Kazuyuki Okada, Hideo Ota, Shigekazu Yokoyama, Hirofumi Miki, Kenji Kobayashi
Systemic chemotherapy based on 5-fluorouracil(5-FU)is a standard treatment for unresectable or recurrent colon cancers. Here, we report a case of hyperammonemia induced by chemotherapy using 5-FU for metastatic colon cancer. An 84-yearold male patient with past histories of liver cirrhosis related to hepatitis C virus and renal dysfunction underwent an operation for the rectosigmoid colon cancer 8 years ago. Three years after that operation, a local recurrence of the colon cancer was diagnosed, and chemotherapy using sLV5FU2 was initiated...
April 2018: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29649172/hadoop-oriented-smart-cities-architecture
#9
Vlad Diaconita, Ana-Ramona Bologa, Razvan Bologa
A smart city implies a consistent use of technology for the benefit of the community. As the city develops over time, components and subsystems such as smart grids, smart water management, smart traffic and transportation systems, smart waste management systems, smart security systems, or e-governance are added. These components ingest and generate a multitude of structured, semi-structured or unstructured data that may be processed using a variety of algorithms in batches, micro batches or in real-time. The ICT architecture must be able to handle the increased storage and processing needs...
April 12, 2018: Sensors
https://www.readbyqxmd.com/read/29648909/diabetes-related-emergency-medical-service-activations-in-23-states-united-states-2015
#10
Stephen R Benoit, Henry S Kahn, Andrew I Geller, Daniel S Budnitz, N Clay Mann, Mengtao Dai, Edward W Gregg, Linda S Geiss
OBJECTIVE: The use of emergency medical services (EMS) for diabetes-related events is believed to be substantial but has not been quantified nationally despite the diverse acute complications associated with diabetes. We describe diabetes-related EMS activations in 2015 among people of all ages from 23 U.S. states. METHODS: We used data from 23 states that reported ≥95% of their EMS activations to the U.S. National Emergency Medical Services Information System (NEMSIS) in 2015...
April 12, 2018: Prehospital Emergency Care
https://www.readbyqxmd.com/read/29648783/emergence-of-fourier-s-law-of-heat-transport-in-quantum-electron-systems
#11
Sosuke Inui, Charles A Stafford, Justin P Bergfield
The microscopic origins of Fourier's venerable law of thermal transport in quantum electron systems has remained somewhat of a mystery, given that previous derivations were forced to invoke intrinsic scattering rates far exceeding those occurring in real systems. We propose an alternative hypothesis, namely, that Fourier's law emerges naturally if many quantum states participate in the transport of heat across the system. We test this hypothesis systematically in a graphene flake junction, and show that the temperature distribution becomes nearly classical when the broadening of the individual quantum states of the flake exceeds their energetic separation...
April 12, 2018: ACS Nano
https://www.readbyqxmd.com/read/29648523/feasibility-and-costs-of-a-targeted-cholera-vaccination-campaign-in-ethiopia
#12
Samuel Teshome, Sachin Desai, Jerome H Kim, Dires Belay, Vittal Mogasale
Shanchol™, a WHO-prequalified oral cholera vaccine (OCV), has been used to control endemic cholera in Asia, as well as in emergencies and outbreaks elsewhere. The vaccine has not been used by public health systems in cholera-endemic settings of Africa although several outbreak response campaigns have been conducted. Here we present experiences from a mass vaccination campaign in a cholera-endemic setting of Ethiopia in which Shanchol™ was introduced through the public health system. The vaccination site was selected based on cholera cases reported in previous years...
April 12, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29644796/hematite-photoanode-with-complex-nanoarchitecture-providing-tunable-gradient-doping-and-remarkable-low-onset-potential-for-advanced-pec-water-splitting
#13
Hyo-Jin Ahn, Anandarup Goswami, Francesca Riboni, Stepan Kment, Alberto Naldoni, Shiva Mohajernia, Radek Zboril, Patrik Schmuki
Over the past years, α-Fe2O3 (hematite) has re-emerged as a promising photoanode material in photoelectrochemical (PEC) water splitting. In spite of considerable success in obtaining relatively high solar conversion efficiency, the main drawbacks hindering practical application at hematite are related to an intrinsically hampered charge transport and a sluggish kinetics of the oxygen evolution reaction on the photoelectrode surface. In the present work, we report a strategy how to synergistically address both these critical limitations...
April 12, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29644294/isolated-right-atrial-appendage-rupture-following-blunt-chest-trauma
#14
Rakesh Hegde, Nathan Lafayette, Michael Sywak, Gregory Ricketts, Jorge Otero, Scott Kurtzman, Zhongqiu Zhang
Background: Right sided tears or rupture are the most common injury to the heart after blunt chest trauma. The majority of these injuries are to the thin walled atrium. Reports of localized right atrial appendage rupture are rare. The classical features of Beck's triad are unreliable in the trauma bay. With the advent of EFAST (Focused assessment with sonography for trauma extended to thorax), Beck's triad should be considered but not used as the primary clinical tool for diagnosis of cardiac tamponade [1]...
February 2018: Trauma Case Reports
https://www.readbyqxmd.com/read/29643478/mucin-gel-assembly-is-controlled-by-a-collective-action-of-non-mucin-proteins-disulfide-bridges-ca-2-mediated-links-and-hydrogen-bonding
#15
Oliver W Meldrum, Gleb E Yakubov, Mauricio R Bonilla, Omkar Deshmukh, Michael A McGuckin, Michael J Gidley
Mucus is characterized by multiple levels of assembly at different length scales which result in a unique set of rheological (flow) and mechanical properties. These physical properties determine its biological function as a highly selective barrier for transport of water and nutrients, while blocking penetration of pathogens and foreign particles. Altered integrity of the mucus layer in the small intestine has been associated with a number of gastrointestinal tract pathologies such as Crohn's disease and cystic fibrosis...
April 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29643473/revisiting-the-role-of-abc-transporters-in-multidrug-resistant-cancer
#16
REVIEW
Robert W Robey, Kristen M Pluchino, Matthew D Hall, Antonio T Fojo, Susan E Bates, Michael M Gottesman
Most patients who die of cancer have disseminated disease that has become resistant to multiple therapeutic modalities. Ample evidence suggests that the expression of ATP-binding cassette (ABC) transporters, especially the multidrug resistance protein 1 (MDR1, also known as P-glycoprotein or P-gp), which is encoded by ABC subfamily B member 1 (ABCB1), can confer resistance to cytotoxic and targeted chemotherapy. However, the development of MDR1 as a therapeutic target has been unsuccessful. At the time of its discovery, appropriate tools for the characterization and clinical development of MDR1 as a therapeutic target were lacking...
April 11, 2018: Nature Reviews. Cancer
https://www.readbyqxmd.com/read/29627599/improving-the-practicality-and-safety-of-artificial-corneas-pre-assembly-and-gamma-rays-sterilization-of-the-boston-keratoprosthesis
#17
Miguel Gonzalez-Andrades, Roholah Sharifi, Mohammad-Mirazul Islam, Thibaut Divoux, Michael Haist, Eleftherios Paschalis, Larisa Gelfand, Shamina Mamodaly, Luca Di Cecilia, Andrea Cruzat, Franz-Josef Ulm, James Chodosh, Francois Delori, Claes H Dohlman
PURPOSE: To make the Boston keratoprosthesis (B-KPro), together with its carrier corneal graft, more easily procured, transported and stored, as well as less expensive, easier for the surgeon to implant and safer for the patient, it is proposed that the B-KPro-graft combination be pre-assembled by an expert technician, followed by sterilization with gamma ray irradiation (GI) allowing long-term storage at room temperature. For this to be possible, it must be shown that the B-KPro itself (not only the graft) remains unharmed by the irradiation...
April 5, 2018: Ocular Surface
https://www.readbyqxmd.com/read/29627247/use-of-on-farm-emergency-slaughter-for-dairy-cows-in-british-columbia
#18
Katherine E Koralesky, David Fraser
On-farm emergency slaughter (OFES), whereby inspection, stunning, and bleeding occur on the farm before the carcass is transported to a slaughterhouse, is permitted in some jurisdictions as a means to avoid inhumane transportation while salvaging meat from injured animals. However, OFES is controversial and its use for dairy cows has been little studied. Inspection documents for 812 dairy cows were examined to identify how OFES was used for dairy cows in British Columbia, Canada, over 16.5 mo. Producers used OFES for dairy cows aged 1 to 13 yr (median of 4 yr)...
April 4, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29624751/analysis-of-the-genomic-basis-of-functional-diversity-in-dinoflagellates-using-a-transcriptome-based-sequence-similarity-network
#19
Arnaud Meng, Erwan Corre, Ian Probert, Andres Gutierrez-Rodriguez, Raffaele Siano, Anita Annamale, Adriana Alberti, Corinne Da Silva, Patrick Wincker, Stéphane Le Crom, Fabrice Not, Lucie Bittner
Dinoflagellates are one of the most abundant and functionally diverse groups of eukaryotes. Despite an overall scarcity of genomic information for dinoflagellates, constantly emerging high-throughput sequencing resources can be used to characterize and compare these organisms. We assembled de novo and processed 46 dinoflagellate transcriptomes and used a sequence similarity network (SSN) to compare the underlying genomic basis of functional features within the group. This approach constitutes the most comprehensive picture to date of the genomic potential of dinoflagellates...
April 6, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29622974/pre-hospital-and-hospital-delay-in-patients-with-non-st-elevation-acute-coronary-syndromes-in-tertiary-care
#20
G S Youssef, H H Kassem, O A Ameen, H S Al Taaban, H H Rizk
Background: Early presentation is desirable in all cases of acute prolonged chest pain. Causes of delayed presentation vary widely across geographic regions because of different patients' profile and different healthcare capabilities. Objectives: To detect causes of delay of Non-ST elevation acute coronary syndrome (NSTE-ACS) patients in our country. Methods: Patients admitted with NSTE-ACS were included. We recorded the time delay between the onsets of acute severe symptoms till their arrival to the hospital (Pre-hospital delay)...
September 2017: The Egyptian heart journal: (EHJ): official bulletin of the Egyptian Society of Cardiology
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