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https://www.readbyqxmd.com/read/30517780/size-dependent-fault-driven-relaxation-and-faceting-in-zincblende-cdse-colloidal-quantum-dots
#1
Daniele Moscheni, Federica Bertolotti, Laura Piveteau, Loredana Protesescu, Dmitry N Dirin, Maksym V Kovalenko, Antonio Cervellino, Jan Skov Pedersen, Norberto Masciocchi, Antonietta Guagliardi
Surface chemistry and core defects are known to play a prominent role in governing the photophysical properties of nanocrystalline semiconductors. Nevertheless, investigating them in small nanocrystals remains a complex task. Here, by combining X-ray scattering techniques in the wide- and small-angle regions and using the Debye Scattering Equation (DSE) method of analysis, we unveil a high density of planar defects in oleate-terminated zincblende (ZB) CdSe colloidal quantum dots (QDs) and size-dependent faceting within a square-cuboid morphology...
December 5, 2018: ACS Nano
https://www.readbyqxmd.com/read/30516516/-time-since-death-estimation-by-using-the-method-of-polycrystalline-cerebrospinal-fluid-films-images-mutual-polarization-degree-levels-distributions-two-dimensional-mapping-with-fine-scale-spatial-frequency-filtration
#2
M Garazdiuk, V Bachinskyi, O Vanchuliak, O Garazdiuk, O Nechytailo
Objective - to develop a method of two-dimensional Stokes-polarimetric spatial-frequency mapping of small-scale components of cerebrospinal fluid to improve the accuracy of post-mortem interval estimation. The object of the study was polycrystalline cerebrospinal fluid films taken from 69 corpses (the main study group) and 20 healthy volunteers (comparison group). For each sample, the coordinate distribution of the values of the complex degree of mutual polarization was determined in the optical arrangement of the Stokes polarimeter...
October 2018: Georgian Medical News
https://www.readbyqxmd.com/read/30515191/optimization-studies-on-recovery-of-metals-from-printed-circuit-board-waste
#3
P Sivakumar, D Prabhakaran, M Thirumarimurugan
The aim of the study was to recover copper and lead metal from waste printed circuit boards (PCBs). The electrowinning method is found to be an effective recycling process to recover copper and lead metal from printed circuit board wastes. In order to simplify the process with affordable equipment, a simple ammonical leaching operation method was adopted. The selected PCBs were incinerated into fine ash powder at 500°C for 1 hour in the pyrolysis reactor. Then, the fine ash powder was subjected to acid-leaching process to recover the metals with varying conditions like acid-base concentration, electrode combination, and leaching time...
2018: Bioinorganic Chemistry and Applications
https://www.readbyqxmd.com/read/30512054/modeling-water-and-nutrient-movement-in-sandy-soils-using-hydrus-2d
#4
Davie M Kadyampakeni, Kelly T Morgan, Peter Nkedi-Kizza, Arnold W Schumann, James W Jawitz
Models help to describe and predict complex processes and scenarios that are difficult to understand or measure in environmental management systems. Thus, model simulations were performed (i) to calibrate HYDRUS-2D for water and solute movement as a possible decision support system for Candler and Immokalee fine sand using data from microsprinkler and drip irrigation methods, (ii) to validate the performance of HYDRUS-2D using field data of microsprinkler and drip irrigation methods, and (iii) to investigate Br, NO, and water movement using annual or seasonal weather data and variable fertigation scenarios...
November 2018: Journal of Environmental Quality
https://www.readbyqxmd.com/read/30510264/recordings-in-an-integrating-central-neuron-provide-a-quick-way-for-identifying-appropriate-anaesthetic-use-in-fish
#5
Peter Machnik, Elisabeth Schirmer, Laura Glück, Stefan Schuster
In animal husbandry, livestock industry and research facilities, anaesthetic agents are frequently used to moderate stressful intervention. For mammals and birds, procedures have been established to fine-tune anaesthesia according to the intervention. In ectothermic vertebrates, however, and despite changes in legislation and growing evidence on their cognitive abilities, the presently available information is insufficient to make similarly informed decisions. Here we suggest a straightforward way for rapidly filling this gap...
December 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30509852/applying-participatory-design-to-a-pharmacy-system-intervention
#6
Apoorva Reddy, Corey A Lester, Jamie A Stone, Richard J Holden, Cynthia H Phelan, Michelle A Chui
BACKGROUND: Stakeholder engagement is an important component of the research process for improving the use and uptake of patient-centered health care innovations. Participatory design (PD), a method that utilizes the involvement of patients and other stakeholders, is well-suited for the design of multifaceted interventions in complex work systems, such as community pharmacies, that have diverse and dynamic end-users. OBJECTIVE: The objective is to describe a blueprint for how to use PD when designing a community pharmacy intervention...
November 27, 2018: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/30509275/capturing-fine-scale-travel-behaviors-a-comparative-analysis-between-personal-activity-location-measurement-system-palms-and-travel-diary
#7
Mingyu Kang, Anne V Moudon, Philip M Hurvitz, Brian E Saelens
BACKGROUND: Device-collected data from GPS and accelerometers for identifying active travel behaviors have dramatically changed research methods in transportation planning and public health. Automated algorithms have helped researchers to process large datasets with likely fewer errors than found in other collection methods (e.g., self-report travel diary). In this study, we compared travel modes identified by a commonly used automated algorithm (PALMS) that integrates GPS and accelerometer data with those obtained from travel diary estimates...
December 3, 2018: International Journal of Health Geographics
https://www.readbyqxmd.com/read/30509054/assessment-of-diagnostic-value-of-cytological-examination-in-lung-carcinoma-in-own-material-obtained-by-ebus-and-eus-methods
#8
Piotr Wiśniewski, Maciej Głogowski, Włodzimierz Olszewski
The aim of the study was the evaluation of the efficiency of cytological examination of the material obtained by endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) and endoscopic ultrasound bronchoscope-guided fine needle aspiration (EUSB-FNA) methods in the diagnosis of lung carcinoma. The usefulness was also assessed of the material obtained in that way for immunocytochemical and molecular tests in the diagnosis of non-small cell lung carcinoma. The material included cytological preparations obtained by EBUS and EUS methods...
2018: Polish Journal of Pathology: Official Journal of the Polish Society of Pathologists
https://www.readbyqxmd.com/read/30507869/intraparotid-facial-nerve-schwannoma-in-a-nine-year-old-patient-diagnosis-classification-and-surgical-approach-stages
#9
Murat Gumussoy, Sumeyye Ekmekci
Intraparotid facial nerve schwannoma (IFNS) is rarely observed in children compared with adults. Only a few cases have been reported in the literature. After radiological imaging and fine needle aspiration biopsy, an IFNS diagnosis may be skipped and confused with pleomorphic adenoma, which has a high prevalence among patients who have a mass in the parotid gland. The probability of IFNS can be recognized by a close relation between the mass and the facial nerve during the application of parotidectomy and by the frozen biopsy of the mass...
November 30, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/30507544/ppls-d-parallel-pareto-local-search-based-on-decomposition
#10
Jialong Shi, Qingfu Zhang, Jianyong Sun
Pareto local search (PLS) is a basic building block in many metaheuristics for a multiobjective combinatorial optimization problem. In this paper, an enhanced PLS variant called parallel PLS based on decomposition (PPLS/D) is proposed. PPLS/D improves the efficiency of PLS using the techniques of parallel computation and problem decomposition. It decomposes the original search space into L subregions and executes L parallel processes searching in these subregions simultaneously. Inside each subregion, the PPLS/D process is guided by a unique scalar objective function...
November 29, 2018: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/30507526/incremental-learning-through-deep-adaptation
#11
Amir Rosenfeld, John K Tsotsos
Given an existing trained neural network, it is often desirable to learn new capabilities without hindering performance of those already learned. Existing approaches either learn sub-optimal solutions, require joint training, or incur a substantial increment in the number of parameters for each added domain, typically as many as the original network. We propose a method called Deep Adaptation Modules (DAM) that constrains newly learned filters to be linear combinations of existing ones. DAMs precisely preserve performance on the original domain, require a fraction (typically 13%, dependent on network architecture) of the number of parameters compared to standard fine-tuning procedures and converge in less cycles of training to a comparable or better level of performance...
November 30, 2018: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/30507505/face-frontalization-using-an-appearance-flow-based-convolutional-neural-network
#12
Zhihong Zhang, Xu Chen, Beizhan Wang, Guosheng Hu, Wangmeng Zuo, Edwin R Hancock
Facial pose variation is one of the major factors making face recognition (FR) a challenging task. One popular solution is to convert non-frontal faces to frontal ones on which face recognition is performed. Rotating faces causes facial pixel value changes. Therefore, existing CNN-based methods learn to synthesize frontal faces in color space. However, this learning problem in a color space is highly non-linear, causing the synthetic frontal faces to lose fine facial textures. In this work, we take the view that the nonfrontal-frontal pixel changes are essentially caused by geometric transformations (rotation, translation, etc) in space...
November 28, 2018: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/30507171/pm-2-5-filter-extraction-methods-implications-for-chemical-and-toxicological-analyses
#13
Courtney Roper, Lisandra Santiago Delgado, Damien Barrett, Staci L Massey Simonich, Robert L Tanguay
Toxicology research into the global public health burden of fine particulate matter (PM2.5 ) exposures frequently requires extraction of PM2.5 from filters. A standardized method for these extractions does not exist, leading to inaccurate inter-laboratory comparisons. It is largely unknown how different filter extraction methods might impact the composition and bioactivity of the resulting samples. We characterized the variation in these metrics by using equal portions of a single PM2.5 filter, with each portion undergoing a different extraction method...
December 3, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/30505584/reclassification-of-lesions-in-biopsies-by-fine-needle-aspiration-of-pancreas-and-biliary-tree-using-papanicolaou-classification
#14
Adriana N López-Ramírez, Lidia F Villegas-González, Mónica L Serrano-Arévalo, Lorena Flores-Hernández, Leonardo S Lino-Silva, Ludwig E González-Mena
Background: Our aim was to evaluate the application of the classification of the Papanicolaou Cytopathology Society for the report of biopsies by fine-needle aspiration (FNA) of pancreas and bile duct. Methods: The FNAs obtained consecutively during 1 year were analyzed. Descriptive statistics were performed and sensitivity, specificity, positive predictive value, negative predictive value, and cytohistological correlation were determined. The reference standard test was the histopathological study...
October 2018: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/30505262/auditory-brainstem-representation-of-the-voice-pitch-contours-in-the-resolved-and-unresolved-components-of-mandarin-tones
#15
Fei Peng, Colette M McKay, Darren Mao, Wensheng Hou, Hamish Innes-Brown
Accurate perception of voice pitch plays a vital role in speech understanding, especially for tonal languages such as Mandarin. Lexical tones are primarily distinguished by the fundamental frequency (F0) contour of the acoustic waveform. It has been shown that the auditory system could extract the F0 from the resolved and unresolved harmonics, and the tone identification performance of resolved harmonics was better than unresolved harmonics. To evaluate the neural response to the resolved and unresolved components of Mandarin tones in quiet and in speech-shaped noise, we recorded the frequency-following response...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/30504911/mapping-of-a-responsible-region-for-sex-reversal-upstream-of-sox9-by-production-of-mice-with-serial-deletion-in-a-genomic-locus
#16
Yuya Ogawa, Miho Terao, Satoshi Hara, Moe Tamano, Haruka Okayasu, Tomoko Kato, Shuji Takada
Sox9 plays critical roles in testis formation. By mapping four familial cases of disorders of sexual development, a 32.5 kb sequence located far upstream of SOX9 was previously identified as being a commonly deleted region and named the XY sex reversal region (XYSR). To narrow down a responsible sequence in XYSR, we generated mutant mice with a series of deletions in XYSR by application of the CRISPR/Cas9 system, using a mixture of sgRNAs targeting several kilobase (kb) intervals in the region. When the whole XYSR corresponding sequence in mice was deleted in XY karyotype individuals, the mutation resulted in female offspring, suggesting that an expression mechanism of SOX9/Sox9 through XYSR is conserved in human and mouse...
November 30, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30502445/quicknat-a-fully-convolutional-network-for-quick-and-accurate-segmentation-of-neuroanatomy
#17
Abhijit Guha Roy, Sailesh Conjeti, Nassir Navab, Christian Wachinger
Whole brain segmentation from structural magnetic resonance imaging (MRI) is a prerequisite for most morphological analyses, but is computationally intense and can therefore delay the availability of image markers after scan acquisition. We introduce QuickNAT, a fully convolutional, densely connected neural network that segments a MRI brain scan in 20 s. To enable training of the complex network with millions of learnable parameters using limited annotated data, we propose to first pre-train on auxiliary labels created from existing segmentation software...
November 28, 2018: NeuroImage
https://www.readbyqxmd.com/read/30501802/synthesis-and-characterization-of-erbium-oxide-nanocrystallites
#18
L'ubomíra Kuzníková, Kateřina Dědková, Lubomír Pavelek, Jana Kupková, Rostislav Váňa, Jana Kukutschová
The present article describes a method of the preparation of erbium oxide nanocrystallites (nano Er₂O₃) via thermal decomposition of a transient complex formed in situ from Er(NO₃)₃·5H₂O and glycine. Decomposition of the complex occurred at about of (250±10) °C. Ultra-fine light pink powder of erbium oxide nanocrystallites was obtained via this method. The resulting nanocrystallites were characterized using X-ray powder diffraction analysis, which showed the nanocrystallites having the crystallite size equal to 10 nm...
May 1, 2019: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30501196/probing-atomic-distributions-in-mono-and-bimetallic-nanoparticles-by-supervised-machine-learning
#19
Janis Timoshenko, Cody J Wrasman, Mathilde Luneau, Tanya Shirman, Matteo Cargnello, Simon Russell Bare, Joanna Aizenberg, Cynthia M Friend, Anatoly I Frenkel
Properties of mono- and bimetallic metal nanoparticles (NPs) may depend strongly on their compositional, structural (or geometrical) attributes and their atomic dynamics, all of which can be efficiently described by a partial radial distribution function (PRDF) of metal atoms. For NPs that are several nanometers in size, finite size effects may play a role in determining crystalline order, interatomic distances and particle shape. Bimetallic NPs may also have different compositional distributions than bulk materials...
December 3, 2018: Nano Letters
https://www.readbyqxmd.com/read/30499762/evaluation-of-statistical-modeling-approaches-for-epidemiologic-studies-of-low-dose-radiation-health-effects
#20
Ashley P Golden, Sarah S Cohen, Heidi Chen, Elizabeth D Ellis, John D Boice
Purpose A substantial body of epidemiologic literature addresses risks associated with occupational radiation exposure but comparing results between studies is often difficult as different statistical models are commonly used. It is unclear whether different methods produce similar results for estimates of radiation risk when applied to the same data. The goal of this study was to compare the radiation risk estimates for leukemia other than chronic lymphocytic leukemia (non-CLL) and ischemic heart disease (IHD) produced by both Cox and Poisson regression models for time-dependent dose-response analyses of occupational exposure...
November 30, 2018: International Journal of Radiation Biology
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