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https://www.readbyqxmd.com/read/29227886/traveling-with-blindness-a-qualitative-space-time-approach-to-understanding-visual-impairment-and-urban-mobility
#1
Sandy Wong
This paper draws from Hägerstrand's space-time framework to generate new insights on the everyday mobilities of individuals with visual impairments in the San Francisco Bay Area. While existing research on visual impairment and mobility emphasizes individual physical limitations resulting from vision loss or inaccessible public spaces, this article highlights and bridges both the behavioral and social processes that influence individual mobility. A qualitative analysis of sit-down and mobile interview data reveals that the space-time constraints of people with visual impairments are closely linked to their access to transportation, assistive technologies, and mobile devices...
December 8, 2017: Health & Place
https://www.readbyqxmd.com/read/29227490/the-role-of-pbi2-in-ch3nh3pbi3-perovskite-stability-solar-cell-parameters-and-device-degradation
#2
Tanaji P Gujar, Thomas Unger, Andreas Schönleber, Martina Fried, Fabian Panzer, Sander van Smaalen, Anna Köhler, Mukundan Thelakkat
We report a systematic investigation on the role of excess PbI2 content in CH3NH3PbI3 perovskite film properties, solar cell parameters and device storage stability. We used the CH3NH3I vapor assisted method for the preparation of PbI2-free CH3NH3PbI3 films under a N2 atmosphere. These pristine CH3NH3PbI3 films were annealed at 165 °C for different time intervals in a N2 atmosphere to generate additional PbI2 in these films. From XRD measurements, the excess of PbI2 was quantified. Detailed characterization using scanning electron microscopy, X-ray diffraction, UV-Visible and photoluminescence for continuous aging of CH3NH3PbI3 films under ambient condition (50% humidity) is carried out for understanding the influence of different PbI2 contents on degradation of the CH3NH3PbI3 films...
December 11, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29226667/enhanced-thermal-conductivity-of-graphene-nanoplatelet-polymer-nanocomposites-fabricated-via-supercritical-fluid-assisted-in-situ-exfoliation
#3
S Mahdi Hamidinejad, Raymond K M Chu, Biao Zhao, Chul B Park, Tobin Filleter
As electronic devices become increasingly miniaturized, their thermal management becomes critical. Efficient heat dissipation guarantees their optimal performance and service life. Graphene nanoplatelets (GnPs) have excellent thermal properties that show promise for use in fabricating commercial polymer nanocomposites with high thermal conductivity. Herein an industrially-viable technique for manufacturing a new class of lightweight GnP-polymer nanocomposites with high thermal conductivity is presented. Using this method, high-density-polyethylene (HDPE)-GnP nanocomposites with a microcellular structure are fabricated by melt mixing, which is followed by supercritical fluid (SCF)-treatment and injection molding foaming which adds an extra layer of design flexibility...
December 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29226531/pre-implant-left-ventricular-apex-position-predicts-risk-of-heartmate-ii-pump-thrombosis
#4
Leora T Yarboro, James Hunter Mehaffey, Robert B Hawkins, Irving L Kron, Gorav Ailawadi, John A Kern, Ravi K Ghanta
BACKGROUND: Thrombosis within a left ventricular assist device (LVAD) is a devastating complication that often necessitates device exchange. Few studies have evaluated the relationship between patient anatomy and pump thrombosis. We hypothesize that lateral displacement of the left ventricular (LV) apex increases risk for pump thrombosis. METHODS: All patients who underwent primary implantation of a HeartMate II (HM2) device (Thoratec, Pleasanton, CA) at a single center (2009-2015) were evaluated...
December 10, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/29225845/conservative-treatment-of-a-young-adult-patient-with-a-moderate-skeletal-class-iii-malocclusion-by-applying-the-temporary-anchorage-devices-and-the-surgically-assisted-rapid-palatal-expansion
#5
Panpan Liu, Hui Chen, Xiaoxin Shi, Jing Guo
We present the orthodontic treatment of a 20-year-old Chinese man with the moderate skeletal Class III malocclusion. The usages of the temporary anchorage devices and the surgically assisted rapid palatal expansion (SARPE) have provided a variety of options for the treatment of Class III malocclusion.
December 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29225047/maldi-tof-ms-analysis-as-a-useful-tool-for-an-identification-of-legionella-pneumophila-a-facultatively-pathogenic-bacterium-interacting-with-free-living-amoebae-a-case-study-from-water-supply-system-of-hospitals-in-bratislava-slovakia
#6
Katarína Trnková, Martina Kotrbancová, Margita Špaleková, Miriam Fulová, Jana Boledovičová, Matej Vesteg
Legionellae, i.e. Legionella pneumophila, are human bacterial hydrophilic facultative pathogens causing pneumonia (Legionnaires' disease). Free-living amoebae (FLA) can serve as natural hosts and thus as reservoirs of many amoebae-resistant bacteria. An encysted amoeba can contribute to the resistance of intracellular L. pneumophila to various chemical and physical treatments. Humans can be infected by droplets containing bacteria from an environmental source or human-made devices such as shower heads, bathtubs, air-conditioning units or whirlpools...
December 7, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/29224839/intraoperative-costs-of-video-assisted-thoracoscopic-lobectomy-can-be-dramatically-reduced-without-compromising-outcomes
#7
Michael T Richardson, Leah M Backhus, Mark F Berry, Daniel G Vail, Kelsey C Ayers, Jalen A Benson, Prasha Bhandari, Mehran Teymourtash, Joseph B Shrager
OBJECTIVE: To determine whether surgeon selection of instrumentation and other supplies during video-assisted thoracoscopic lobectomy (VATSL) can safely reduce intraoperative costs. METHODS: In this retrospective, cost-focused review of all video-assisted thoracoscopic surgery anatomic lung resections performed by 2 surgeons at a single institution between 2010 and 2014, we compared VATSL hospital costs and perioperative outcomes between the surgeons, as well as costs of VATSL compared with thoracotomy lobectomy (THORL)...
November 13, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29224416/utilising-three-dimensional-printing-techniques-when-providing-unique-assistive-devices-a-case-report
#8
Sarah Jane Day, Shaun Patrick Riley
BACKGROUND: The evolution of three-dimensional printing into prosthetics has opened conversations about the availability and cost of prostheses. This report will discuss how a prosthetic team incorporated additive manufacture techniques into the treatment of a patient with a partial hand amputation to create and test a unique assistive device which he could use to hold his French horn. Case description and methods: Using a process of shape capture, photogrammetry, computer-aided design and finite element analysis, a suitable assistive device was designed and tested...
December 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29223845/seeing-is-believing-a-call-for-routine-early-postoperative-hemodynamic-transesophageal-echocardiography-monitoring-after-left-ventricular-assist-device-implantation
#9
EDITORIAL
Juan N Pulido
No abstract text is available yet for this article.
November 22, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29223668/transumbilical-extracorporeal-laparoscopic-assisted-appendectomy
#10
Lindsey Perea, William H Peranteau, Pablo Laje
AIM OF THE STUDY: The perfect balance between safety, cosmesis, and cost effectiveness in a world with ever growing healthcare costs has yet to be found for nonperforated appendicitis. The aim is to present our data regarding safety and cost effectiveness of the transumbilical extracorporeal laparoscopic-assisted appendectomy technique. METHODS: A retrospective review was performed for all laparoscopic appendectomies for acute appendicitis from October 2014 to October 2016...
November 13, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/29223421/a-prospective-multi-institutional-cohort-study-of-mediastinal-infections-after-cardiac-operations
#11
Louis P Perrault, Katherine A Kirkwood, Helena L Chang, John C Mullen, Brian C Gulack, Michael Argenziano, Annetine C Gelijns, Ravi K Ghanta, Bryan A Whitson, Deborah L Williams, Nancy M Sledz-Joyce, Brian Lima, Giampaolo Greco, Nishit Fumakia, Eric A Rose, John D Puskas, Eugene H Blackstone, Richard D Weisel, Michael E Bowdish
BACKGROUND: Mediastinal infections are a potentially devastating complication of cardiac operations. This study analyzed the frequency, risk factors, and perioperative outcomes of mediastinal infections after cardiac operations. METHODS: In 2010, 5,158 patients enrolled in a prospective study evaluating infections after cardiac operations and their effect on readmissions and mortality for up to 65 days after the procedure. Clinical and demographic characteristics, operative variables, management practices, and outcomes were compared for patients with and without mediastinal infections, defined as deep sternal wound infection, myocarditis, pericarditis, or mediastinitis...
December 6, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29223417/left-ventricular-assist-device-impact-on-aortic-valve-mechanics-proteomics-and-ultrastructure
#12
Elizabeth H Stephens, Jiho Han, Emma A Trawick, Elena S Di Martino, Hemanth Akkiraju, Lewis M Brown, Jennifer P Connell, K Jane Grande-Allen, Gordana Vunjak-Novakovic, Hiroo Takayama
BACKGROUND: Aortic regurgitation is a prevalent, detrimental complication of left ventricular assist devices (LVADs). The altered hemodynamics of LVADs results in aortic valves (AVs) having distinct mechanical stimulation. Our hypothesis was that the altered AV hemodynamics modulates the valve cells and matrix, resulting in changes in valvular mechanical properties that then can lead to regurgitation. METHODS: AVs were collected from 16 LVAD and 6 non-LVAD patients at time of heart transplant...
December 6, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29223289/frequency-and-consequences-of-right-sided-heart-failure-after-continuous-flow-left-ventricular-assist-device-implantation
#13
Chitaru Kurihara, Andre C Critsinelis, Masashi Kawabori, Tadahisa Sugiura, Gabriel Loor, Andrew B Civitello, Jeffrey A Morgan
Postoperative right-sided heart failure (RHF) is a common complication after continuous-flow left ventricular assist device implantation. Studies have examined RHF in the perioperative period, but few have assessed late-onset RHF. We analyzed the incidence of early and late RHF in patients with HeartMate II and HeartWare left ventricular assist devices and associated morbidity, mortality, and independent predictors of RHF. We retrospectively analyzed records of 526 patients with chronic heart failure who underwent continuous-flow left ventricular assist device implantation; 147 (27...
October 31, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29222320/anticoagulation-with-vads-and-ecmo-walking-the-tightrope
#14
REVIEW
Leslie Raffini
The evolution of devices for mechanical circulatory support (MCS), including ventricular assist devices (VADs) for patients with heart failure and extracorporeal membrane oxygenation (ECMO) for patients with acute cardiac or respiratory failure, has improved survival for subsets of critically ill children and adults. The devices are intricate and complex, allowing blood to bypass the heart or lungs (or both). As blood flows through these artificial devices, normal hemostasis is disrupted, coagulation is promoted, and in the absence of anticoagulation, a thrombus may form in the device, resulting in device failure or embolic stroke...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29221959/robotically-assisted-percutaneous-coronary-intervention-reasons-for-partial-manual-assistance-or-manual-conversion
#15
Jonathan Harrison, Lawrence Ang, Jesse Naghi, Omid Behnamfar, Ali Pourdjabbar, Mitul P Patel, Ryan R Reeves, Ehtisham Mahmud
BACKGROUND: Robotically-assisted percutaneous coronary intervention (R-PCI) is feasible for simple coronary lesions. OBJECTIVES: To determine the frequency and reasons for partial manual assistance or manual conversion during R-PCI in clinical practice. METHODS: The CorPath 200 System (Corindus, Waltham, MA) enables the operator to sit in a radiation-shielded cockpit and remotely control intracoronary devices including guidewires, balloons, and stents...
November 9, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29221520/disability-characteristics-of-community-based-rehabilitation-participants-in-kayunga-district-uganda
#16
Lukia Namaganda Hamid, Olive Kobusingye, Sebastian Olikira Baine, Chrispus Mayora, Jacob A Bentley
BACKGROUND: Approximately 80% of individuals with disability reside in low- and middle-income countries where community-based rehabilitation (CBR) has been used as a strategy to improve disability. However, data relating to disability severity among CBR beneficiaries in low-income countries like Uganda remain scarce, particularly at the community or district level. OBJECTIVES: To describe severity of disability and associated factors for persons with physical disabilities receiving CBR services in the Kayunga district of Uganda...
May 2017: Annals of Global Health
https://www.readbyqxmd.com/read/29219945/vats-plication-of-the-diaphragm-a-descriptive-observational-10-year-southampton-experience
#17
Rhona J Taberham, Adnan Raza, Aiman Alzetani, Edwin B Woo, Martin H Chamberlain, George Koulaxouzidis, Khalid M Amer
OBJECTIVE: The aim of the study was to report the safety and efficacy of video-assisted thoracoscopic (VATS) plication of the diaphragm at our institution between 2006 and 2016. METHODS: Adult patients selected on etiology and combination of investigations including plain chest x-ray, computed tomography of chest and abdomen, lung functions in supine and sitting positions, radiological/ultrasonic screening for diaphragmatic movement, and phrenic nerve conduction studies...
December 6, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/29219877/effectiveness-of-robotic-assisted-rehabilitation-for-mobility-and-functional-ability-in-adult-stroke-patients-a-systematic-review
#18
Kenneth Lo, Matthew Stephenson, Craig Lockwood
BACKGROUND: Stroke is a leading cause of long-term disability, and rehabilitation, involving repetitive, high intensity, task-specific exercises, is the pathway to restoring motor skills. Robotic assistive devices are increasingly being used and it is hoped that with robotic devices, rehabilitation progress can be achieved for patients. OBJECTIVES: To examine the effectiveness of robotic devices in the rehabilitation of stroke patients for upper limb mobility, lower limb mobility, and activities of daily living...
December 2017: JBI Database of Systematic Reviews and Implementation Reports
https://www.readbyqxmd.com/read/29219476/giant-interatomic-energy-transport-amplification-with-nonreciprocal-photonic-topological-insulators
#19
Pierre Doyeux, S Ali Hassani Gangaraj, George W Hanson, Mauro Antezza
We show that the energy-transport efficiency in a chain of two-level emitters can be drastically enhanced by the presence of a photonic topological insulator (PTI). This is obtained by exploiting the peculiar properties of its nonreciprocal surface plasmon polariton (SPP), which is unidirectional, and immune to backscattering, and propagates in the bulk band gap. This amplification of transport efficiency can be as much as 2 orders of magnitude with respect to reciprocal SPPs. Moreover, we demonstrate that despite the presence of considerable imperfections at the interface of the PTI, the efficiency of the SPP-assisted energy transport is almost unaffected by discontinuities...
October 27, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29219326/boosting-the-efficiency-of-quantum-dot-sensitized-solar-cells-through-formation-of-cation-exchanged-hole-transporting-layer
#20
Sourav Maiti, Farazuddin Azlan, Pranav Anand, Yogesh Jadhav, Jayanta Dana, Santosh K Haram, Hirendra N Ghosh
In search of a viable way to enhance the power conversion efficiency (PCE) of quantum dot sensitized solar cells (QDSSC) we have designed a method by introducing a hole transporting layer (HTL) of p-type CuS through partial cation exchange process in post synthetic ligand assisted assembly of nanocrystals (NCs). High quality CdSe and CdSSe gradient alloy NCs were synthesized through colloidal method and the charge carrier dynamics was monitored through ultrafast transient absorption (TA) measurements. Notable increase in the short circuit current concomitant with the increase in open circuit voltage and fill factor lead to 45% increment in PCE for CdSe based solar cell upon formation of the CuS HTL...
December 8, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
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