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https://www.readbyqxmd.com/read/28527449/correlated-matrix-fluctuation-mediated-activated-transport-of-dilute-penetrants-in-glass-forming-liquids-and-suspensions
#1
Rui Zhang, Kenneth S Schweizer
We formulate a microscopic, force-level statistical mechanical theory for the activated diffusion of dilute penetrants in dense liquids, colloidal suspensions, and glasses. The approach explicitly and self-consistently accounts for coupling between penetrant hopping and matrix dynamic displacements that actively facilitate the hopping event. The key new ideas involve two mechanistically (at a stochastic trajectory level) coupled dynamic free energy functions for the matrix and spherical penetrant particles...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28513375/helping-victims-of-modern-slavery
#2
Louise Cahill
I was volunteering at a refugee centre when a woman told me she was the happiest she could remember being. She said she had previously been a slave, and no matter how bad I thought her situation was now, it was always better than her past.
May 17, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28513095/research-of-the-master-slave-robot-surgical-system-with-the-function-of-force-feedback
#3
Yunyong Shi, Chaozheng Zhou, Le Xie, Yongjun Chen, Jun Jiang, Zhenfeng Zhang, Ze Deng
BACKGROUND: Surgical robots lack force feedback, which may lead to operation errors. In order to improve surgical outcomes, this research developed a new master-slave surgical robot, which was designed with an integrated force sensor. METHODS: The new structure designed for the master-slave robot employs a force feedback mechanism. A six-dimensional force sensor was mounted on the tip of the slave robot's actuator. Sliding model control was adopted to control the slave robot...
May 17, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28511559/migrating-microbes-what-pathogens-can-tell-us-about-population-movements-and-human-evolution
#4
Charlotte J Houldcroft, Jean-Baptiste Ramond, Riaan F Rifkin, Simon J Underdown
BACKGROUND: The biology of human migration can be observed from the co-evolutionary relationship with infectious diseases. While many pathogens are brief, unpleasant visitors to human bodies, others have the ability to become life-long human passengers. The story of a pathogen's genetic code may, therefore, provide insight into the history of its human host. The evolution and distribution of disease in Africa is of particular interest, because of the deep history of human evolution in Africa, the presence of a variety of non-human primates, and tropical reservoirs of emerging infectious diseases...
May 16, 2017: Annals of Human Biology
https://www.readbyqxmd.com/read/28509947/-arboviruses-also-have-an-american-dream
#5
F Rodhain
Some arboviruses that originated in the Old World have been introduced by humans into the American continent. The first of them was the yellow fever virus, coming from the West African coast with slaves in the 17th-19th centuries, followed by dengue viruses, which were always prevalent within the Americas. Next was theWest Nile virus, introduced in New York in 1999, that spread in only a few years over the whole continent. Then, Chikungunya virus arrived on Saint Martin Island in 2013 after its outbreak in Polynesia; it is now widespread in the Caribbean Islands and on the American continent from the United States to Brazil...
May 16, 2017: Bulletin de la Société de Pathologie Exotique
https://www.readbyqxmd.com/read/28504952/exponential-synchronization-of-networked-chaotic-delayed-neural-network-by-a-hybrid-event-trigger-scheme
#6
Zhongyang Fei, Chaoxu Guan, Huijun Gao
This paper is concerned with the exponential synchronization for master-slave chaotic delayed neural network with event trigger control scheme. The model is established on a network control framework, where both external disturbance and network-induced delay are taken into consideration. The desired aim is to synchronize the master and slave systems with limited communication capacity and network bandwidth. In order to save the network resource, we adopt a hybrid event trigger approach, which not only reduces the data package sending out, but also gets rid of the Zeno phenomenon...
May 12, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28498709/topological-magnon-bands-and-unconventional-superconductivity-in-pyrochlore-iridate-thin-films
#7
Pontus Laurell, Gregory A Fiete
We theoretically study the magnetic properties of pyrochlore iridate bilayer and trilayer thin films grown along the [111] direction using a strong coupling approach. We find the ground state magnetic configurations on a mean field level and carry out a spin-wave analysis about them. In the trilayer case the ground state is found to be the all-in-all-out (AIAO) state, whereas the bilayer has a deformed AIAO state. For all parameters of the spin-orbit coupled Hamiltonian we study, the lowest magnon band in the trilayer case has a nonzero Chern number...
April 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28492035/the-german-experiment-health-care-without-female-or-jewish-doctors
#8
Alexa R Shipman
Jewish and female doctors were not allowed to practice medicine in Germany during Hitler's rule from 1933 to 1945. Data about the consequences of this on the health service are difficult to come by, but what information can be gathered demonstrates a detrimental effect on the nation's health. These data, however, must be interpreted with consideration to the morbidity and mortality from violence, death camps, slave labor, and the privations of war. The article summarizes the history of German health care during this period and also compares Germany to other nations at that time...
March 2017: International Journal of Women's Dermatology
https://www.readbyqxmd.com/read/28486405/compensation-of-pvt-variations-in-tof-imagers-with-in-pixel-tdc
#9
Ion Vornicu, Ricardo Carmona-Galán, Ángel Rodríguez-Vázquez
The design of a direct time-of-flight complementary metal-oxide-semiconductor (CMOS) image sensor (dToF-CIS) based on a single-photon avalanche-diode (SPAD) array with an in-pixel time-to-digital converter (TDC) must contemplate system-level aspects that affect its overall performance. This paper provides a detailed analysis of the impact of process parameters, voltage supply, and temperature (PVT) variations on the time bin of the TDC array. Moreover, the design and characterization of a global compensation loop is presented...
May 9, 2017: Sensors
https://www.readbyqxmd.com/read/28467024/endoluminal-surgical-triangulation-2-0-a-new-flexible-surgical-robot-preliminary-pre-clinical-results-with-colonic-submucosal-dissection
#10
András Légner, Michele Diana, Péter Halvax, Yu-Yin Liu, Lucile Zorn, Philippe Zanne, Florent Nageotte, Michel De Mathelin, Bernard Dallemagne, Jacques Marescaux
BACKGROUND: Complex intraluminal surgical interventions of the gastrointestinal tract are challenging due to the limitation of existing instruments. Our group has developed a master-slave robotic flexible endoscopic platform that provides instrument triangulation in an endoluminal environment. MATERIALS AND METHODS: Colonic endoscopic submucosal dissections (ESD) were carried out in eight pigs. The robot was introduced transanally. A combination of adapted tele-operated instruments was used...
May 3, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28463616/intelligent-control-of-neurosurgical-robot-mm-3-using-dynamic-motion-scaling
#11
Sunho Ko, Atsushi Nakazawa, Yusuke Kurose, Kanako Harada, Mamoru Mitsuishi, Shigeo Sora, Naoyuki Shono, Hirofumi Nakatomi, Nobuhito Saito, Akio Morita
OBJECTIVE Advanced and intelligent robotic control is necessary for neurosurgical robots, which require great accuracy and precision. In this article, the authors propose methods for dynamically and automatically controlling the motion-scaling ratio of a master-slave neurosurgical robotic system to reduce the task completion time. METHODS Three dynamic motion-scaling modes were proposed and compared with the conventional fixed motion-scaling mode. These 3 modes were defined as follows: 1) the distance between a target point and the tip of the slave manipulator, 2) the distance between the tips of the slave manipulators, and 3) the velocity of the master manipulator...
May 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28448445/horizontal-directional-drilling-length-detection-technology-while-drilling-based-on-bi-electro-magnetic-sensing
#12
Yudan Wang, Guojun Wen, Han Chen
The drilling length is an important parameter in the process of horizontal directional drilling (HDD) exploration and recovery, but there has been a lack of accurate, automatically obtained statistics regarding this parameter. Herein, a technique for real-time HDD length detection and a management system based on the electromagnetic detection method with a microprocessor and two magnetoresistive sensors employing the software LabVIEW are proposed. The basic principle is to detect the change in the magnetic-field strength near a current coil while the drill stem and drill-stem joint successively pass through the current coil forward or backward...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28447178/an-mri-guided-telesurgery-system-using-a-fabry-perot-interferometry-force-sensor-and-a-pneumatic-haptic-device
#13
Hao Su, Weijian Shang, Gang Li, Niravkumar Patel, Gregory S Fischer
This paper presents a surgical master-slave teleoperation system for percutaneous interventional procedures under continuous magnetic resonance imaging (MRI) guidance. The slave robot consists of a piezoelectrically actuated 6-degree-of-freedom (DOF) robot for needle placement with an integrated fiber optic force sensor (1-DOF axial force measurement) using the Fabry-Perot interferometry (FPI) sensing principle; it is configured to operate inside the bore of the MRI scanner during imaging. By leveraging the advantages of pneumatic and piezoelectric actuation in force and position control respectively, we have designed a pneumatically actuated master robot (haptic device) with strain gauge based force sensing that is configured to operate the slave from within the scanner room during imaging...
April 26, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28443403/advice-for-health-visitors-on-identifying-domestic-slaves
#14
(no author information available yet)
Health visitors are in a good position to spot the signs that someone is living as a domestic slave, according to the Institute of Health Visiting (IHV).
April 26, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28436913/synchronization-of-reaction-diffusion-neural-networks-with-dirichlet-boundary-conditions-and-infinite-delays
#15
Yin Sheng, Hao Zhang, Zhigang Zeng
This paper is concerned with synchronization for a class of reaction-diffusion neural networks with Dirichlet boundary conditions and infinite discrete time-varying delays. By utilizing theories of partial differential equations, Green's formula, inequality techniques, and the concept of comparison, algebraic criteria are presented to guarantee master-slave synchronization of the underlying reaction-diffusion neural networks via a designed controller. Additionally, sufficient conditions on exponential synchronization of reaction-diffusion neural networks with finite time-varying delays are established...
April 17, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28434128/aspects-on-the-history-of-transmission-and-favor-of-distribution-of-viruses-by-iatrogenic-action-perhaps-an-example-of-a-paradigm-of-the-worldwide-spread-of-hiv
#16
REVIEW
Lutz G Gürtler, Josef Eberle
Transmission of infectious agents might be associated with iatrogenic actions of charitable help in health care. An example is the vaccination against yellow fever in USA that transmitted hepatitis B virus. Another example is injections of praziquantel for treatment and cure of schistosomiasis in Central and Northern Africa, with a focus in Egypt that has spread hepatitis C virus. There is no indication that human T-lymphotropic virus type 1 was spread by injection treatment for African trypanosomiasis, syphilis and treponematosis, but these treatments might have contributed to the early spread of human immunodeficiency virus type 1 (HIV-1) in Central Africa...
April 22, 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28421308/an-intelligent-remote-monitoring-system-for-total-knee-arthroplasty-patients
#17
Yunus Msayib, Patrick Gaydecki, Michael Callaghan, Nicola Dale, Sheheera Ismail
For the first six weeks following total knee arthroplasty (TKA), a patient will attend an outpatient clinic typically seen twice weekly. Here, an exercise regime is performed and improvement assessed using a hand held goniometer that measures the maximum angle of knee flexion, an important metric of progress. Additionally a series of daily exercises is performed at home, recorded in a diary. This protocol has problems. Patients must attend the hospital with assistance since they are not permitted to drive for six weeks following the procedure; appointments are sometimes missed; there are occasionally not enough physiotherapy appointment available; furthermore, it is difficult to be sure that patients are compliant with their exercises at home...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28421179/synergy-based-bilateral-port-a-universal-control-module-for-tele-manipulation-frameworks-using-asymmetric-master-slave-systems
#18
Anais Brygo, Ioannis Sarakoglou, Giorgio Grioli, Nikos Tsagarakis
Endowing tele-manipulation frameworks with the capability to accommodate a variety of robotic hands is key to achieving high performances through permitting to flexibly interchange the end-effector according to the task considered. This requires the development of control policies that not only cope with asymmetric master-slave systems but also whose high-level components are designed in a unified space in abstraction from the devices specifics. To address this dual challenge, a novel synergy port is developed that resolves the kinematic, sensing, and actuation asymmetries of the considered system through generating motion and force feedback references in the hardware-independent hand postural synergy space...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28398057/from-master-slave-to-peer-to-peer-coupling-in-chemical-reaction-networks
#19
Gábor Holló, Brigitta Dúzs, István Szalai, István Lagzi
Design strategy through linking a driving pH oscillator (master system) to a pH sensitive complexation, precipitation, or protonation equilibrium (slave system) has been widely used to create and control concentration oscillations of chemical entities (e.g., monovalent cations, DNA, nanoparticles) not participating in the pH oscillatory system. No systematic investigation has been carried out on how the components of these equilibria affect the characteristics of the driving pH oscillators, and this feedback effect has been often neglected in previous studies...
May 4, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28388472/robust-fixed-time-synchronization-for-uncertain-complex-valued-neural-networks-with-discontinuous-activation-functions
#20
Xiaoshuai Ding, Jinde Cao, Ahmed Alsaedi, Fuad E Alsaadi, Tasawar Hayat
This paper is concerned with the fixed-time synchronization for a class of complex-valued neural networks in the presence of discontinuous activation functions and parameter uncertainties. Fixed-time synchronization not only claims that the considered master-slave system realizes synchronization within a finite time segment, but also requires a uniform upper bound for such time intervals for all initial synchronization errors. To accomplish the target of fixed-time synchronization, a novel feedback control procedure is designed for the slave neural networks...
June 2017: Neural Networks: the Official Journal of the International Neural Network Society
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