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https://www.readbyqxmd.com/read/28645068/fracture-roughness-and-phase-transformation-in-cad-cam-milling-and-subsequent-surface-treatments-of-lithium-metasilicate-disilicate-glass-ceramics
#1
Abdur-Rasheed Alao, Richard Stoll, Xiao-Fei Song, John R Abbott, Yu Zhang, Jaafar Abduo, Ling Yin
This paper studied surface fracture, roughness and morphology, phase transformations, and material removal mechanisms of lithium metasilicate/disilicate glass ceramics (LMGC/LDGC) in CAD/CAM-milling and subsequent surface treatments. LMGC (IPS e.max CAD) blocks were milled using a chairside dental CAD/CAM milling unit and then treated in sintering, polishing and glazing processes. X-ray diffraction was performed on all processed surfaces. Scanning electron microscopy (SEM) was applied to analyse surface fracture and morphology...
June 15, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28644810/action-recognition-using-3d-histograms-of-texture-and-a-multi-class-boosting-classifier
#2
Baochang Zhangm, Yun Yangm, Chen Chen, Linlin Yang, Jungong Han, Ling Shao
Human action recognition is an important yet challenging task. This paper presents a low-cost descriptor called 3D Histograms of Texture (3DHoTs) to extract discriminant features from a sequence of depth maps. 3DHoTs are derived from projecting depth frames onto three orthogonal Cartesian planes, i.e., the frontal, side and top planes, and thus compactly characterize the salient information of a specific action, on which texture features are calculated to represent the action. Besides this fast feature descriptor, a new multi-class boosting classifier (MBC) is also proposed to efficiently exploit different kinds of features in a unified framework for action classification...
June 21, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28644804/global-time-delay-estimation-in-ultrasound-elastography
#3
Hoda S Hashemi, Hassan Rivaz
A critical step in quasi-static ultrasound elastography is estimation of time-delay between two frames of radiofrequency (RF) data that are obtained while the tissue is undergoing deformation. This paper presents a novel technique for timedelay estimation (TDE) of all samples of RF data simultaneously, thereby exploiting all the information in RF data for TDE. A nonlinear cost function that incorporates similarity of RF data intensity and prior information of displacement continuity is formulated. Optimization of this function involves searching for TDE of all samples of the RF data, rendering the optimization intractable with conventional techniques given that the number of variables can be approximately one million...
June 21, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28644617/dynamic-covalent-chemistry-of-carbon-dioxide-opportunities-to-address-environmental-issues
#4
Jean Septavaux, Geoffroy Germain, Julien Leclaire
Extraction and purification of basic chemicals from complex mixtures has been a persistent issue throughout the development of the chemical sciences. The chemical industry and academic research have grown over the centuries by following a deconstruction-reconstruction approach, reminiscent of the metabolism process. Chemists have designed and optimized extraction, purification, and transformation processes of molecules from natural deposits (fossil fuels, biomass, ores), in order to reassemble them into complex adducts...
June 23, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28644607/electrochemical-exfoliation-of-graphite-in-aqueous-sodium-halide-electrolytes-towards-low-oxygen-content-graphene-for-energy-and-environmental-applications
#5
Jose Maria Munuera, Juan Ignacio Paredes, Marina Enterria, Ana Pagán, Silvia Villar-Rodil, Manuel Fernando R Pereira, J I Martins, José L Figueiredo, Jose Luis Cenis, Amelia Martinez-Alonso, Juan Manuel D Tascon
Graphene and graphene-based materials have shown great promise in many technological applications, but their large-scale production and processing by simple and cost-effective means still constitute significant issues in the path of their widespread implementation. Here, we investigate a straightforward method for the preparation of a ready-to-use and low oxygen content graphene material that is based on electrochemical (anodic) delamination of graphite in aqueous medium with sodium halides as the electrolyte...
June 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28644579/pairing-field-methods-to-improve-inference-in-wildlife-surveys-while-accommodating-detection-covariance
#6
John Clare, Shawn T McKinney, John E DePue, Cynthia S Loftin
It is common to use multiple field sampling methods when implementing wildlife surveys to compare method efficacy or cost-efficiency, integrate distinct pieces of information provided by separate methods, or evaluate method-specific biases and misclassification error. Existing models that combine information from multiple field methods or sampling devices permit rigorous comparison of method-specific detection parameters, enable estimation of additional parameters such as false-positive detection probability, and improve occurrence or abundance estimates, but with the assumption that the separate sampling methods produce detections independently of one another...
June 23, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28644494/feco-nanoparticles-embedded-carbon-nanofibers-as-robust-peroxidase-mimics-for-sensitive-colorimetric-detection-of-l-cysteine
#7
Zezhou Yang, Yun Zhu, Guangdi Nie, Meixuan Li, Ce Wang, Xiaofeng Lu
A simple and low cost detection of l-cysteine is essential in the fields of biosensors and medical diagnosis. In this study, we have developed a simple electrospinning, followed by calcination process to prepare FeCo nanoparticles embedded in carbon nanofibers (FeCo-CNFs) as an efficient peroxidase-like mimic for the detection of l-cysteine. FeCo nanoparticles are uniformly dispersed within CNFs, and their diameters are highly influenced by the calcination temperature. The calcination temperature also influences the peroxidase-like catalytic activity, and the maximum activity is achieved at a calcination temperature of 550 °C...
June 23, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28644493/photoelectrochemical-devices-for-solar-water-splitting-materials-and-challenges
#8
Chaoran Jiang, Savio J A Moniz, Aiqin Wang, Tao Zhang, Junwang Tang
It is widely accepted within the community that to achieve a sustainable society with an energy mix primarily based on solar energy we need an efficient strategy to convert and store sunlight into chemical fuels. A photoelectrochemical (PEC) device would therefore play a key role in offering the possibility of carbon-neutral solar fuel production through artificial photosynthesis. The past five years have seen a surge in the development of promising semiconductor materials. In addition, low-cost earth-abundant co-catalysts are ubiquitous in their employment in water splitting cells due to the sluggish kinetics of the oxygen evolution reaction (OER)...
June 23, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28644101/safety-and-cost-efficiency-of-a-restrictive-transfusion-protocol-in-patients-with-traumatic-brain-injury
#9
Laura B Ngwenya, Catherine G Suen, Phiroz E Tarapore, Geoffrey T Manley, Michael C Huang
OBJECTIVE Blood loss and moderate anemia are common in patients with traumatic brain injury (TBI). However, despite evidence of the ill effects and expense of the transfusion of packed red blood cells, restrictive transfusion practices have not been universally adopted for patients with TBI. At a Level I trauma center, the authors compared patients with TBI who were managed with a restrictive (target hemoglobin level > 7 g/dl) versus a liberal (target hemoglobin level > 10 g/dl) transfusion protocol. This study evaluated the safety and cost-efficiency of a hospital-wide change to a restrictive transfusion protocol...
June 23, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28643568/process-mining-based-method-of-designing-and-optimizing-the-layouts-of-emergency-departments-in-hospitals
#10
Farhood Rismanchian, Young Hoon Lee
OBJECTIVE: This article proposes an approach to help designers analyze complex care processes and identify the optimal layout of an emergency department (ED) considering several objectives simultaneously. These objectives include minimizing the distances traveled by patients, maximizing design preferences, and minimizing the relocation costs. BACKGROUND: Rising demand for healthcare services leads to increasing demand for new hospital buildings as well as renovating existing ones...
July 2017: HERD
https://www.readbyqxmd.com/read/28643260/a-simple-protocol-for-loss-of-function-analysis-in-xenopus-tropicalis-founders-using-the-crispr-cas-system
#11
Yuto Sakane, Ken-Ich T Suzuki, Takashi Yamamoto
Xenopus tropicalis is a versatile model organism for studying basic biology such as developmental biology and cell biology, and for biomedical research on human diseases. Current genome editing techniques enable researchers to easily perform gene targeting in various animals. Among them, gene knockout using the Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)-CRISPR-associated (Cas) (CRISPR-Cas) system has recently become an indispensable strategy for loss-of-function analysis in vivo. Because of its ease of use, time, and cost efficiencies, CRISPR-Cas has also been applied to X...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28643250/genome-editing-in-mouse-zygotes-and-embryonic-stem-cells-by-introducing-sgrna-cas9-expressing-plasmids
#12
Taichi Noda, Asami Oji, Masahito Ikawa
In mammalian cells, genome editing with the single guide RNA (sgRNA)/Cas9 complex allows for high targeting efficiency within a relatively short time frame with the added benefits of being low cost and easy to design. sgRNA/Cas9-mediated editing in mouse zygotes has accelerated the analysis of gene functions and the generation of mouse models of human diseases. Despite the benefits, this method still suffers from several problems, such as mosaicism in the founder generation which complicates genotyping and phenotypical analyses, and the low efficiency of more complicated genome editing...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28643058/prospective-randomized-comparison-of-the-use-of-floshield-air-system-%C3%A2-versus-the-reference-technique-water%C3%A2-%C3%A2-povidone-iodine-solution-during-gynecologic-endoscopic-surgery-to-evaluate-the-operative-lens-vision-quality
#13
S Bendifallah, E Salakos, I Naoura, P Aristizabal, E Furet, S Zilberman, M Ballester, E Darai
BACKGROUND: The FloShield Air System(®) is a new device for laparoscopic surgery that utilizes a continuous dry CO2 gas flow over the scope to defog the lens and protect it from condensation, debris and smoke. We set out to compare the performance and efficiency of the device in terms of operative lens vision quality (OLVQ) with the reference technique (water + povidone-iodine (PVI) solution) during gynecologic laparoscopic surgery. MATERIALS AND METHODS: We conducted a single-center randomized prospective study between March and June 2016 (Trials Database Registration NCT02702531) including 53 patients undergoing gynecologic laparoscopic surgery with water + PVI solution and 51 patients who underwent surgical procedures with the FloShield Air System...
June 22, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28642781/effects-of-nitrogen-supply-on-water-stress-and-recovery-mechanisms-in-kentucky-bluegrass-plants
#14
Shah Saud, Shah Fahad, Chen Yajun, Muhammad Z Ihsan, Hafiz M Hammad, Wajid Nasim, Amanullah, Muhammad Arif, Hesham Alharby
Non-irrigated crops in temperate and irrigated crops in arid regions are exposed to an incessant series of drought stress and re-watering. Hence, quick and efficient recuperation from drought stress may be amongst the key determinants of plant drought adjustment. Efficient nitrogen (N) nutrition has the capability to assuage water stress in crops by sustaining metabolic activities even at reduced tissue water potential. This study was designed to understand the potential of proper nutrition management by studying the morphological and physiological attributes, and assimilation of nitrogen in Kentucky bluegrass under drought stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642613/protecting-visual-short-term-memory-during-maintenance-attentional-modulation-of-target-and-distractor-representations
#15
Marlies E Vissers, Rasa Gulbinaite, Tijl van den Bos, Heleen A Slagter
In the presence of distraction, attentional filtering is a key predictor of efficient information storage in visual short-term memory (VSTM). Yet, the role of attention in distractor filtering, and the extent to which attentional filtering continues to protect information during post-perceptual stages of VSTM, remains largely unknown. In the current study, we investigated the role of spatial attention in distractor filtering during VSTM encoding and maintenance. Participants performed a change detection task with varying distractor load...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642073/synthesis-of-biogenic-ag-pd-core-shell-nanoparticles-having-anti-cancer-anti-microbial-functions
#16
Wafa I Abdel-Fattah, M M Eid, Sh I Abd El-Moez, E Mohamed, Ghareib W Ali
Biogenic Ag@Pd core-shell nanoparticles were greenly synthesized within two plant extracts aiming at enhanced anticancer/bactericidal functions. These functions were verified for the two Pd@Ag biogenic core-shell nanoparticles (BCSnp) with constant Pd to several Ag contents. BCSnp were synthesized within two extracts of Almond nuts and Black Berry fruits, four samples each, through simple, low cost and echo friendly microwave route. The BCSnp Surface Plasmon Resonance (SPR) was detected via UV/visible spectrophotometer...
June 19, 2017: Life Sciences
https://www.readbyqxmd.com/read/28641703/a-randomised-controlled-trial-to-assess-the-cost-effectiveness-of-intensive-versus-no-scheduled-follow-up-in-patients-who-have-undergone-resection-for-colorectal-cancer-with-curative-intent
#17
David Mant, Alastair Gray, Siân Pugh, Helen Campbell, Stephen George, Alice Fuller, Bethany Shinkins, Andrea Corkhill, Jane Mellor, Elizabeth Dixon, Louisa Little, Rafael Perera-Salazar, John Primrose
BACKGROUND: Intensive follow-up after surgery for colorectal cancer is common practice but lacks a firm evidence base. OBJECTIVE: To assess whether or not augmenting symptomatic follow-up in primary care with two intensive methods of follow-up [monitoring of blood carcinoembryonic antigen (CEA) levels and scheduled imaging] is effective and cost-effective in detecting the recurrence of colorectal cancer treatable surgically with curative intent. DESIGN: Randomised controlled open-label trial...
May 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28641435/validating-and-implementing-modified-filinov-phase-filtration-in-semiclassical-dynamics
#18
Matthew S Church, Sergey V Antipov, Nandini Ananth
The Mixed Quantum-Classical Initial Value Representation (MQC-IVR) is a recently introduced approximate semiclassical (SC) method for the calculation of real-time quantum correlation functions. MQC-IVR employs a modified Filinov filtration (MFF) scheme to control the overall phase of the SC integrand, extending the applicability of SC methods to complex systems while retaining their ability to accurately describe quantum coherence effects. Here, we address questions regarding the effectiveness of the MFF scheme in combination with SC dynamics...
June 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28641204/towards-dosimetry-for-photodynamic-diagnosis-with-the-low-level-dose-of-photosensitizer
#19
Igor Buzalewicz, Iwona Hołowacz, Agnieszka Ulatowska-Jarża, Halina Podbielska
BACKGROUND: Contemporary medicine does not concern the issue of dosimetry in photodynamic diagnosis (PDD) but follows the photosensitizer (PS) producers recommendation. Most preclinical and clinical PDD studies indicate a considerable variation in the possibility of visualization and treatment, as e.g. in case of cervix lesions. Although some of these variations can be caused by the different histological subtypes or various tumor geometries, the issue of varying PS concentration in the tumor tissue volume is definitely an important factor...
June 15, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28640993/locking-in-optimal-nanoscale-structure-induced-by-naphthalenediimide-based-polymeric-additive-enables-efficient-and-stable-inverted-polymer-solar-cells
#20
Kwang Hyun Park, Yujin An, Seungon Jung, Hyesung Park, Changduk Yang
Operational stability and high performance are the most critical issues that must be addressed in order to propel and advance the current polymer solar cell (PSC) technology to the next level such as manufacturing and mass production. Herein, we report a high power conversion efficiency (PCE) of 11.2% together with an excellent device stability in PTB7-Th:PC71BM-based PSCs in the inverted structure by introducing the n-type P(NDI2OD-T2) macromolecular additive (>75% PCE retention at high temperature up to 120 °C, >97% PCE retention after 6 months in inert conditions, >93% PCE retention after 2 months in air with encapsulation, and >80% PCE retention after 140 h in air without encapsulation)...
June 22, 2017: ACS Nano
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