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https://www.readbyqxmd.com/read/29775347/dirac-and-chiral-quantum-spin-liquids-on-the-honeycomb-lattice-in-a-magnetic-field
#1
Zheng-Xin Liu, B Normand
Motivated by recent experimental observations in α-RuCl_{3}, we study the K-Γ model on the honeycomb lattice in an external magnetic field. By a slave-particle representation and variational Monte Carlo calculations, we reproduce the phase transition from zigzag magnetic order to a field-induced disordered phase. The nature of this state depends crucially on the field orientation. For particular field directions in the honeycomb plane, we find a gapless Dirac spin liquid, in agreement with recent experiments on α-RuCl_{3}...
May 4, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29761842/design-and-performance-evaluation-of-real-time-endovascular-interventional-surgical-robotic-system-with-high-accuracy
#2
Kundong Wang, Bing Chen, Qingsheng Lu, Hongbing Li, Manhua Liu, Yu Shen, Zhuoyan Xu
BACKGROUND: Endovascular interventional surgery (EIS) is performed under a high radiation environment at the sacrifice of surgeons' health. This paper introduces a novel endovascular interventional surgical robot that aims to reduce radiation to surgeons and physical stress imposed by lead aprons during fluoroscopic X-ray guided catheter intervention. METHODS: The unique mechanical structure allowed the surgeon to manipulate the axial and radial motion of the catheter and guide wire...
May 15, 2018: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29726690/human-genome-evolution-and-development-of-cardiovascular-risk-factors-through-natural-selection
#3
R Poledne, J Zicha
Impressive advances in molecular genetic techniques allow to analyze the effects of natural selection on the development of human genome. For example, the trend towards blonde hair and blue eyes was documented. The approach to analyze possible effects of natural selection on the evolution of recent phenotypes with high risk of cardiovascular disease has not been described yet. A possible effect on the evolution of two main risk factors - hypercholesterolemia and hypertension - is presented. The close relationship of non-HDL cholesterol blood concentration to the proportion of pro-inflammatory macrophages in human visceral adipose tissue might be a result of long-lasting natural selection...
May 4, 2018: Physiological Research
https://www.readbyqxmd.com/read/29715266/population-structure-in-argentina
#4
Marina Muzzio, Josefina M B Motti, Paula B Paz Sepulveda, Muh-Ching Yee, Thomas Cooke, María R Santos, Virginia Ramallo, Emma L Alfaro, Jose E Dipierri, Graciela Bailliet, Claudio M Bravi, Carlos D Bustamante, Eimear E Kenny
We analyzed 391 samples from 12 Argentinian populations from the Center-West, East and North-West regions with the Illumina Human Exome Beadchip v1.0 (HumanExome-12v1-A). We did Principal Components analysis to infer patterns of populational divergence and migrations. We identified proportions and patterns of European, African and Native American ancestry and found a correlation between distance to Buenos Aires and proportion of Native American ancestry, where the highest proportion corresponds to the Northernmost populations, which is also the furthest from the Argentinian capital...
2018: PloS One
https://www.readbyqxmd.com/read/29715029/interlocking-molecular-gear-chains-built-on-surfaces
#5
Rundong Zhao, Fei Qi, Yan-Ling Zhao, Klaus E Hermann, Rui-Qin Zhang, Michel A Van Hove
Periodic chains of molecular gears in which molecules couple with each other and rotate on surfaces have been previously explored by us theoretically using ab initio simulation tools. Based on the knowledge and experience gained about the interactions between neighboring molecular gears, we here explore the transmission of rotational motion and energy over larger distances, namely through a longer chain of gear-like passive "slave" molecules. Such microscopic gears exhibit quite different behaviors compared to rigid cogwheels in the macroscopic world, due to their structural flexibility affecting intermolecular interaction...
May 1, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29696056/from-the-black-atlantic-to-the-bleak-pacific-re-reading-benito-cereno
#6
Alexandra Ganser
Herman Melville's novella "Benito Cereno" (1855/56) is one of the best-studied texts both within Melville's oeuvre and nineteenth-century American literature in general. In recent decades, its puzzling structure and fragmented narrative perspective as well as its symbolism and themes have been subject to critical scrutiny mostly in the context of inquiries into the text's racial politics regarding the institution of slavery. More specifically, the canonical tale about a slave uprising on the ship San Dominick , its detection by a Massachusetts-born captain and its consequences, has been discussed in the context of Paul Gilroy's black Atlantic paradigm...
2018: Atlantic Studies
https://www.readbyqxmd.com/read/29695945/thinking-about-denial
#7
Catherine Hall, Daniel Pick
This essay considers the frequent and varied uses of 'denial' in modern political discourse, suggests the specific psychoanalytic meanings the term has acquired and asks how useful this Freudian concept may be for historians. It notes the debates among historians over the uses of psychoanalysis, but argues that concepts such as 'denial', 'disavowal', 'splitting' and 'negation' can help us to understand both individual and group behaviour. The authors dwell, especially, on 'disavowal' and argue it can provide a particularly useful basis for exploring how and why states of knowing and not knowing co-exist...
October 2017: History Workshop Journal: HWJ
https://www.readbyqxmd.com/read/29681809/tactile-star-a-novel-tactile-stimulator-and-recorder-system-for-evaluating-and-improving-tactile-perception
#8
Giulia Ballardini, Giorgio Carlini, Psiche Giannoni, Robert A Scheidt, Ilana Nisky, Maura Casadio
Many neurological diseases impair the motor and somatosensory systems. While several different technologies are used in clinical practice to assess and improve motor functions, somatosensation is evaluated subjectively with qualitative clinical scales. Treatment of somatosensory deficits has received limited attention. To bridge the gap between the assessment and training of motor vs. somatosensory abilities, we designed, developed, and tested a novel, low-cost, two-component (bimanual) mechatronic system targeting tactile somatosensation: the Tactile-STAR -a tactile stimulator and recorder...
2018: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29677147/detection-of-anomalous-noise-events-on-low-capacity-acoustic-nodes-for-dynamic-road-traffic-noise-mapping-within-an-hybrid-wasn
#9
Rosa Ma Alsina-Pagès, Francesc Alías, Joan Claudi Socoró, Ferran Orga
One of the main aspects affecting the quality of life of people living in urban and suburban areas is the continuous exposure to high road traffic noise (RTN) levels. Nowadays, thanks to Wireless Acoustic Sensor Networks (WASN) noise in Smart Cities has started to be automatically mapped. To obtain a reliable picture of the RTN, those anomalous noise events (ANE) unrelated to road traffic (sirens, horns, people, etc.) should be removed from the noise map computation by means of an Anomalous Noise Event Detector (ANED)...
April 20, 2018: Sensors
https://www.readbyqxmd.com/read/29662297/graphics-processing-unit-enhanced-genetic-algorithms-for-solving-the-temporal-dynamics-of-gene-regulatory-networks
#10
REVIEW
Raúl García-Calvo, J L Guisado, Fernando Diaz-Del-Rio, Antonio Córdoba, Francisco Jiménez-Morales
Understanding the regulation of gene expression is one of the key problems in current biology. A promising method for that purpose is the determination of the temporal dynamics between known initial and ending network states, by using simple acting rules. The huge amount of rule combinations and the nonlinear inherent nature of the problem make genetic algorithms an excellent candidate for finding optimal solutions. As this is a computationally intensive problem that needs long runtimes in conventional architectures for realistic network sizes, it is fundamental to accelerate this task...
2018: Evolutionary Bioinformatics Online
https://www.readbyqxmd.com/read/29657750/anticipation-from-sensation-using-anticipating-synchronization-to-stabilize-a-system-with-inherent-sensory-delay
#11
Henry Eberle, Slawomir J Nasuto, Yoshikatsu Hayashi
We present a novel way of using a dynamical model for predictive tracking control that can adapt to a wide range of delays without parameter update. This is achieved by incorporating the paradigm of anticipating synchronization (AS), where a 'slave' system predicts a 'master' via delayed self-feedback. By treating the delayed output of the plant as one half of a 'sensory' AS coupling, the plant and an internal dynamical model can be synchronized such that the plant consistently leads the target's motion. We use two simulated robotic systems with differing arrangements of the plant and internal model ('parallel' and 'serial') to demonstrate that this form of control adapts to a wide range of delays without requiring the parameters of the controller to be changed...
March 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29651926/nine-months-a-slave-when-pregnancy-is-involuntary-servitude-to-a-foetus
#12
Kiva Diamond Allotey-Reidpath, Pascale Allotey, Daniel D Reidpath
Recent globally compiled evidence suggests that one-quarter of pregnancies end in abortions. However, abortions remain illegal in many countries, resulting in unsafe practices. Debates have largely stalled with the pro-life, pro-choice epithets. To provide further arguments in support of legalising abortion services, we argue that the state cannot demand of a woman that she maintains an unwanted pregnancy because that demand places her in a state of involuntary servitude. Involuntary servitude would put states in breach of international human rights law (Article 8 of International Covenant on Civil and Political Rights)...
December 2018: Reproductive Health Matters
https://www.readbyqxmd.com/read/29616572/science-reflects-history-as-society-influences-science-brief-history-of-race-race-correction-and-the-spirometer
#13
Heidi L Lujan, Stephen E DiCarlo
Spirometers are used globally to diagnose respiratory diseases, and most commercially available spirometers "correct" for race. "Race correction" is built into the software of spirometers. To evaluate pulmonary function and to make recordings, the operator must enter the subject's race. In fact, the Joint Working Party of the American Thoracic Society/European Respiratory Society recommends the use of race- and ethnic-specific reference values. In the United States, spirometers apply correction factors of 10-15% for individuals labeled "Black" and 4-6% for people labeled "Asian...
June 1, 2018: Advances in Physiology Education
https://www.readbyqxmd.com/read/29610988/operating-force-information-on-line-acquisition-of-a-novel-slave-manipulator-for-vascular-interventional-surgery
#14
Yan Zhao, Shuxiang Guo, Nan Xiao, Yuxin Wang, Youxiang Li, Yuhua Jiang
Vascular interventional surgery has its advantages compared to traditional operation. Master-slave robotic technology can further improve the operation accuracy, efficiency and safety of this complicated and high risk surgery. However, on-line acquisition of operating force information of catheter and guidewire remains to be a significant obstacle on the path to enhancing robotic surgery safety. Thus, a novel slave manipulator is proposed in this paper to realize on-line sensing of guidewire torsional operating torque and axial operation force during robotic assisted operations...
April 2, 2018: Biomedical Microdevices
https://www.readbyqxmd.com/read/29607759/-it-s-like-being-a-slave-to-your-own-body-in-a-way-a-qualitative-study-of-adolescents-with-chronic-fatigue-syndrome
#15
Berit Widerøe Njølstad, Anne Marit Mengshoel, Unni Sveen
BACKGROUND: Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) is a relatively common disabling illness in adolescents that may limit participation in daily life. AIM: This study explored interactions between the illness experiences of adolescents with CFS/ME, their occupational lives and expectations for the future. METHODS: Seven adolescents with CFS/ME were interviewed. The interviews were analyzed using thematic analysis. RESULTS: Three themes were developed...
April 1, 2018: Scandinavian Journal of Occupational Therapy
https://www.readbyqxmd.com/read/29604732/laser-frequency-stabilization-using-a-transfer-interferometer
#16
Shira Jackson, Hiromitsu Sawaoka, Nishant Bhatt, Shreyas Potnis, Amar C Vutha
We present a laser frequency stabilization system that uses a transfer interferometer to stabilize slave lasers to a reference laser. Our implementation uses off-the-shelf optical components along with microcontroller-based digital feedback, and offers a simple, flexible, and robust way to stabilize multiple laser frequencies to better than 1 MHz.
March 2018: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29594884/an-eco-friendly-method-for-heavy-metal-removal-from-mine-tailings
#17
Fereshteh Arab, Catherine N Mulligan
One of the serious environmental problems that society is facing today is mine tailings. These byproducts of the process of extraction of valuable elements from ores are a source of pollution and a threat to the environment. For example, mine tailings from past mining activities at Giant Mines, Yellowknife, are deposited in chambers, stopes, and tailing ponds close to the shores of The Great Slave Lake. One of the environmentally friendly approaches for removing heavy metals from these contaminated tailing is by using biosurfactants during the process of soil washing...
March 29, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29592795/phylogenomics-of-palearctic-formica-species-suggests-a-single-origin-of-temporary-parasitism-and-gives-insights-to-the-evolutionary-pathway-toward-slave-making-behaviour
#18
Jonathan Romiguier, Jonathan Rolland, Claire Morandin, Laurent Keller
BACKGROUND: The ants of the Formica genus are classical model species in evolutionary biology. In particular, Darwin used Formica as model species to better understand the evolution of slave-making, a parasitic behaviour where workers of another species are stolen to exploit their workforce. In his book "On the Origin of Species" (1859), Darwin first hypothesized that slave-making behaviour in Formica evolved in incremental steps from a free-living ancestor. METHODS: The absence of a well-resolved phylogenetic tree of the genus prevent an assessment of whether relationships among Formica subgenera are compatible with this scenario...
March 28, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29582681/iodide-mumps-following-vascular-access-management
#19
Francesco Londrino, Antonio Granata, Paola Tatangelo, Slave Boiceff, Gerardo Dessì, Roberto Palumbo
No abstract text is available yet for this article.
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29577580/development-of-a-new-3-dof-parallel-manipulator-for-minimally-invasive-surgery
#20
Alaa Khalifa, Mohamed Fanni, Abdelfatah M Mohamed, Tomoyuki Miyashita
This article proposes a novel dexterous endoscopic parallel manipulator for minimally invasive surgery. The proposed manipulator has 3 degrees of freedom (3-DOF), which consist of two rotational DOFs and one translational DOF (2R1T DOFs). The manipulator consists of 3 limbs exhibiting identical kinematic structure. Each limb contains an active prismatic joint followed by 2 consecutive passive universal joints. The proposed manipulator has a unique arrangement of its joints' axes. This unique arrangement permits large bending angles, ±90° in any direction, and a workspace almost free from interior singularities...
March 26, 2018: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
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