54,958 results match your criteria Boundary Value Problems[Journal]


Language Specificity in Phonetic Cue Weighting: Monolingual and Bilingual Perception of the Stop Voicing Contrast in English and Spanish.

Phonetica 2019 Apr 24:1-23. Epub 2019 Apr 24.

Department of Speech, Language and Hearing Sciences, University of Florida, Gainesville, Florida, USA.

Background/aims: This work examines the perception of the stop voicing contrast in Spanish and English along four acoustic dimensions, comparing monolingual and bilingual listeners. Our primary goals are to test the extent to which cue-weighting strategies are language-specific in monolinguals, and whether this language specificity extends to bilingual listeners.

Methods: Participants categorized sounds varying in voice onset time (VOT, the primary cue to the contrast) and three secondary cues: fundamental frequency at vowel onset, first formant (F1) onset frequency, and stop closure duration. Read More

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http://dx.doi.org/10.1159/000497278DOI Listing

Discretized dynamics of exchange spin wave bulk and edge modes in honeycomb nanoribbons with armchair edge boundaries.

J Phys Condens Matter 2019 Apr 24. Epub 2019 Apr 24.

Department of Theoretical Physics, Jan Dlugosz University in Czestochowa, Czestochowa, POLAND.

We develop a field theory to study the dynamics of long wavelength exchange spin wave excitations on honeycomb nanoribbons characterized by armchair edge boundaries and the Néel antiferromagnetic ordering state. Appropriate boundary conditions are established by requiring that the bulk and edge spins precess with the same frequency for any given spin wave eigenmode in these systems. A set of characteristic boundary equations, common for bulk and edge spin wave modes, are hence derived. Read More

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http://dx.doi.org/10.1088/1361-648X/ab1c2eDOI Listing

Strong Charge Transfer at 2H-1T Phase Boundary of MoS for Superb High-Performance Energy Storage.

Small 2019 Apr 24:e1900131. Epub 2019 Apr 24.

Department of Materials Science and Engineering, National University of Singapore, Singapore, 117574, Singapore.

Transition metal dichalcogenides exhibit several different phases (e.g., semiconducting 2H, metallic 1T, 1T') arising from the collective and sluggish atomic displacements rooted in the charge-lattice interaction. Read More

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http://dx.doi.org/10.1002/smll.201900131DOI Listing

TORS for OSA: a practice, pitfalls and literature review.

Int J Health Care Qual Assur 2019 Mar;32(2):488-498

Imperial College Healthcare NHS Trust, London, UK.

Purpose: Trans-oral robotic surgery (TORS) is increasingly employed in obstructive sleep apnoea (OSA) management. Objective outcomes are generally assessed through polysomnography. Pre-operative magnetic resonance imaging (MRI) can be a useful adjunct in objective upper airway assessment, in particular the tongue base, providing useful information for surgical planning and outcome assessment, though care must be taken in patient positioning during surgery. Read More

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http://dx.doi.org/10.1108/IJHCQA-05-2018-0112DOI Listing

Brain Tumor Segmentation Based on Improved Convolutional Neural Network in Combination with Non-quantifiable Local Texture Feature.

J Med Syst 2019 Apr 23;43(6):152. Epub 2019 Apr 23.

Department of Orthopaedics, West China Hospital of Sichuan University, Chengdu, 610000, Sichuan, China.

Accurate and reliable brain tumor segmentation is a critical component in cancer diagnosis. According to deep learning model, a novel brain tumor segmentation method is developed by integrating fully convolutional neural networks (FCNN) and dense micro-block difference feature (DMDF) into a unified framework so as to obtain segmentation results with appearance and spatial consistency. Firstly, we propose a local feature to describe the rotation invariant property of the texture. Read More

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http://dx.doi.org/10.1007/s10916-019-1289-2DOI Listing

Spreading speed for a West Nile virus model with free boundary.

J Math Biol 2019 Apr 23. Epub 2019 Apr 23.

School of Science and Technology, University of New England, Armidale, NSW, 2351, Australia.

The purpose of this paper is to determine the precise asymptotic spreading speed of the virus for a West Nile virus model with free boundary, introduced recently in Lin and Zhu (J Math Biol 75:1381-1409, 2017), based on a model of Lewis et al. (Bull Math Biol 68:3-23, 2006). We show that this speed is uniquely defined by a semiwave solution associated with the West Nile virus model. Read More

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http://dx.doi.org/10.1007/s00285-019-01363-2DOI Listing

Counterion binding on coacervation of dioctyl sulfosuccinate in aqueous sodium chloride.

Soft Matter 2019 Apr 24. Epub 2019 Apr 24.

School of Chemical, Biological, and Materials Engineering, University of Oklahoma, Norman, Oklahoma 73019, USA.

A simple coacervate-forming system consisting of sodium dioctyl sulfosuccinate (DOSS) in aqueous NaCl solution was investigated by turbidity measurement, electromotive force measurement (EMF), dynamic light scattering (DLS), and cryogenic transmission electron microscopy (cryo-TEM) to reveal the role of counterion binding in the microstructural changes behind the evolution of the coacervate phase. Coacervation phase boundaries of DOSS against different NaCl concentrations were obtained; the pseudo-coacervation constant, Ksp,co = [DOSS-][Na+], was determined to be 1.35 ± 0. Read More

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http://dx.doi.org/10.1039/c8sm02531bDOI Listing

In Situ Atomic-Scale Observation of Kinetic Pathways of Sublimation in Silver Nanoparticles.

Adv Sci (Weinh) 2019 Apr 30;6(8):1802131. Epub 2019 Jan 30.

Nanostructured Materials Group Department of Advanced Electron Microscopy Imaging and Spectroscopy International Iberian Nanotechnology Laboratory (INL) Avenida Mestre Jose Veiga Braga 4715-330 Portugal.

Uncovering kinetics of sublimation atomically is critical to understanding both natural phenomena and advanced manufacturing technologies. Here, direct in situ atomic-scale observations to understand the effects of size, surface, and defects in the sublimation process of supported silver nanoparticles upon heating within an aberration-corrected transmission electron microscopy are conducted. Atomic-scale evidence to sublimation and atomic rearrangement in small Ag nanoparticles during heating is provided, and it is demonstrated that the sublimation-induced stable surfaces in the particles with a size smaller than ≈30 nm are {111} and {100} planes. Read More

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http://dx.doi.org/10.1002/advs.201802131DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6468973PMC

Risk of fatal adverse events in cancer patients treated with sunitinib.

Crit Rev Oncol Hematol 2019 May 16;137:115-122. Epub 2019 Mar 16.

The Second Affiliated Hospital & Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, 325027, China; The Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, China. Electronic address:

Sunitinib, a tyrosine kinase inhibitor, is widely used in several malignancies. However, the association between sunitinib administration and fatal adverse events (FAEs) is not completely clear. Here, to calculate the overall incidence and relative risks (RRs) of FAE induced by sunitinib, PubMed and Embase were searched from inception to September 2017 for phase III randomized controlled trials (RCTs). Read More

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http://dx.doi.org/10.1016/j.critrevonc.2019.03.007DOI Listing

Evolution and phylogeography analysis of diploid and polyploid Misgurnus anguillicaudatus populations across China.

Proc Biol Sci 2019 Apr;286(1901):20190076

College of Fisheries, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University , Wuhan 430070 , People's Republic of China.

The origin and evolution of polyploid organisms have been extensively studied in plants, but this topic remains only partially understood in vertebrates, where polyploidy is relatively rare. In this study, we used Misgurnus anguillicaudatus, a fish that comprises five ploidy levels in nature, as a model animal to improve our understanding of biogeographic history and evolution of polyploid vertebrates. After collecting samples from different geographical populations in China, their ploidy levels were determined using flow cytometry. Read More

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http://dx.doi.org/10.1098/rspb.2019.0076DOI Listing

Combined Thickness and Permittivity Measurement of Thin Layers with Open-Ended Coaxial Probes.

Sensors (Basel) 2019 Apr 12;19(8). Epub 2019 Apr 12.

Department of Physics and Technology, University of Bergen, Allégaten 55, NO-5007 Bergen, Norway.

This paper presents a method to simultaneously determine the thickness and permittivity of thin layers from multi-frequency reflection coefficient measurements using an open-ended coaxial probe. This is achieved by exploiting that the probe becomes radiating at frequencies higher than the probe's typical operating range. Permittivity information is extracted from measurements in the typical frequency range, whereas thickness information is obtained from high frequency measurements by exploiting resonances that occur when the radiated waves are reflected at the layer boundary. Read More

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http://dx.doi.org/10.3390/s19081765DOI Listing

Enhancing Sensor Network Security with Improved Internal Hardware Design.

Sensors (Basel) 2019 Apr 12;19(8). Epub 2019 Apr 12.

School of Computer & Communication Engineering, Changsha University of Science & Technology, Changsha 410114, China.

With the rapid development of the Internet-of-Things (IoT), sensors are being widely applied in industry and human life. Sensor networks based on IoT have strong Information transmission and processing capabilities. The security of sensor networks is progressively crucial. Read More

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http://dx.doi.org/10.3390/s19081752DOI Listing

Transcriptome Analysis of Larval Segment Formation and Secondary Loss in the Echiuran Worm .

Int J Mol Sci 2019 Apr 12;20(8). Epub 2019 Apr 12.

College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.

The larval segment formation and secondary loss in echiurans is a special phenomenon, which is considered to be one of the important characteristics in the evolutionary relationship between the Echiura and Annelida. To better understand the molecular mechanism of this phenomenon, we revealed the larval transcriptome profile of the echiuran worm using RNA-Seq technology. Twelve cDNA libraries of larvae, late-trochophore (LT), early-segmentation larva (ES), segmentation larva (SL), and worm-shaped larva (WL) were constructed. Read More

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http://dx.doi.org/10.3390/ijms20081806DOI Listing

Effect of Micro-Steps on Twinning and Interfacial Segregation in Mg-Ag Alloy.

Materials (Basel) 2019 Apr 22;12(8). Epub 2019 Apr 22.

Nano and Heterogeneous Material Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Twinning structures and their interfacial segregation play a key role in strengthening of magnesium alloys. Micro-steps are frequently existed in the incoherent twin boundaries, while the effect of them on interface and interfacial segregation is still not clear. In this work, we performed an atomic-scale microstructure analysis using high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) to explore the effect of micro-steps on twin and its interfacial segregation in Mg-Ag alloy. Read More

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http://dx.doi.org/10.3390/ma12081307DOI Listing

Habitat edge responses of generalist predators are predicted by prey and structural resources.

Ecology 2019 Apr 23:e02662. Epub 2019 Apr 23.

Department of Biological Sciences, University of Denver, Denver, Colorado, 80208, USA.

Generalist predators are thought to be less vulnerable to habitat fragmentation because they use diverse resources across larger spatial scales than specialist predators. Thus, it has been suggested that generalist predators may respond positively to habitat edges or demonstrate no edge response, because they can potentially use prey resources equally well on both sides of the habitat edge. However, most predictions about generalist predator responses to the habitat edge are based solely on prey resources, without consideration of other potential drivers. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/ecy.2662
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http://dx.doi.org/10.1002/ecy.2662DOI Listing
April 2019
2 Reads

Mass transport analysis of bicarbonate buffer: Effect of the CO-HCO hydration-dehydration kinetics in the fluid boundary layer and the apparent effective pKa controlling dissolution of acids and bases.

Mol Pharm 2019 Apr 23. Epub 2019 Apr 23.

The main buffering system influencing ionizable drug dissolution in the human intestinal fluid is bicarbonate-based; however, it is rarely used in routine pharmaceutical practice due to the volatility of dissolved CO. The typical pharmaceutical buffers used fail to capture the unique aspects of the hydration-dehydration kinetics of the bicarbonate-CO system. In particular, CO is involved in a reversible interconversion with carbonic acid (HCO), which is the actual conjugate acid of the system, as follows (CO + HO ⇌ HCO). Read More

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http://dx.doi.org/10.1021/acs.molpharmaceut.9b00187DOI Listing

Diverging Exchange Force and Form of the Exact Density Matrix Functional.

Phys Rev Lett 2019 Jan;122(1):013001

Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany.

For translationally invariant one-band lattice models, we exploit the ab initio knowledge of the natural orbitals to simplify reduced density matrix functional theory (RDMFT). Striking underlying features are discovered. First, within each symmetry sector, the interaction functional F depends only on the natural occupation numbers n. Read More

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http://dx.doi.org/10.1103/PhysRevLett.122.013001DOI Listing
January 2019

Investigation of Temperature and Feature Size Effects on Deformation of Metals by Superplastic Nanomolding.

Authors:
Ze Liu

Phys Rev Lett 2019 Jan;122(1):016101

Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan, Hubei 430072, China.

We report a novel method to introduce feature size into the prevalent deformation-mechanism map by the superplastic nanomolding technique. This new map enables various deformation mechanisms to be decoupled and allows for experimentally identifying the boundary between dislocation and diffusion dominated deformation regimes. Moreover, the proposed method provides a practical way to investigate the temperature effect on the mechanical properties of materials at small scales. Read More

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https://link.aps.org/doi/10.1103/PhysRevLett.122.016101
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http://dx.doi.org/10.1103/PhysRevLett.122.016101DOI Listing
January 2019
1 Read

Interacting Hofstadter Interface.

Phys Rev Lett 2019 Jan;122(1):010406

Institut für Theoretische Physik, Goethe-Universität, 60438 Frankfurt am Main, Germany.

Two-dimensional topological insulators possess conducting edge states at their boundary while being insulating in the bulk. We investigate the edge state emergent at a smooth topological phase boundary of interacting fermions within a full real-space analysis of the time-reversal invariant Hofstadter-Hubbard model. We characterize the localization of the edge state and the topological phase boundary by means of the local compressibility, the spectral density, a generalized local spin Chern marker as well as the Hall response and find good agreement between all these quantities. Read More

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http://dx.doi.org/10.1103/PhysRevLett.122.010406DOI Listing
January 2019

Temperature Fluctuation Profiles in Turbulent Thermal Convection: A Logarithmic Dependence versus a Power-Law Dependence.

Phys Rev Lett 2019 Jan;122(1):014503

Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China.

We report an experimental measurement of the rms temperature (σ_{T}) profiles in two regions inside a large aspect ratio (Γ=4.2) rectangular convection cell. It is found that, in the region where the boundary layer is sheared by a large-scale wind, σ_{T} has a power-law dependence on the vertical distance (z) from the plate, whereas in the region where plumes are abundant, σ_{T} has a logarithmic dependence on z. Read More

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https://link.aps.org/doi/10.1103/PhysRevLett.122.014503
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http://dx.doi.org/10.1103/PhysRevLett.122.014503DOI Listing
January 2019
3 Reads

Gene dunce Localization in the Polytene Chromosome of Drosophila melanogaster Long Span Batch of Adjacent Chromosomal Structures.

Dokl Biochem Biophys 2019 May 22;484(1):55-58. Epub 2019 Apr 22.

Institute of Molecular and Cellular Biology, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia.

The molecular and chromosomal localization of the dunce gene was studied. This gene (167.3 kb) consists almost entirely of introns, in which a cluster of seven short tissue-specific genes is located. Read More

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http://dx.doi.org/10.1134/S1607672919010137DOI Listing

A computer aided diagnosis system for measurement of mandibular cortical thickness on dental panoramic radiographs in prediction of women with low bone mineral density.

J Med Syst 2019 Apr 22;43(6):148. Epub 2019 Apr 22.

Department of Chemistry, C. Kandasamy Naidu college for women, Cuddalore, 607 001, India.

Osteoporosis detection at earlier stages can enhance the life span of an elderly individual. The aim of the study is to perform semi-automated measurement of mandibular cortical thickness (MCT) on a dental panoramic radiograph (DPR) and thereby to predict the risk of low BMD among the studied population. The study involved 76 women (mean age: 57. Read More

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http://dx.doi.org/10.1007/s10916-019-1268-7DOI Listing

REGAT: A permanent GPS network in Algeria, configuration and first results.

Heliyon 2019 Apr 10;5(4):e01435. Epub 2019 Apr 10.

Ecole normale supérieure, Dept. of Geosciences, Université PSL, Paris, France.

The REGAT () geodetic network is composed of 53 continuously-recording GPS stations distributed in the Algerian Atlas. It spans the whole width of the Algerian coast and reaches 300 km inland, with inter-sites distance of about 100 km. One additional site is located in Tamanrasset in the southernmost part of the country. Read More

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http://dx.doi.org/10.1016/j.heliyon.2019.e01435DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6460426PMC

The role of cell surface structures in colonization of the air-liquid interface.

Authors:
Aretha Fiebig

J Bacteriol 2019 Apr 22. Epub 2019 Apr 22.

Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL.

In aquatic environments, spp. are often present at the boundary between liquid and air known as the neuston. I report an approach to study temporal features of colonization and pellicle biofilm development at the air-liquid interface, and have defined the role of cell surface structures in this process. Read More

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http://dx.doi.org/10.1128/JB.00064-19DOI Listing

Study of the Microstructure and Ring Element Segregation Zone of Spray Deposited SiC/7055Al.

Materials (Basel) 2019 Apr 20;12(8). Epub 2019 Apr 20.

Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.

Composites of 7055 aluminum (Al) matrix reinforced with SiC particles were prepared using the spray deposition method. The volume fraction of the phase reinforced with SiC particles was 17%. The effect of the introduction of SiC particles on the deposited microstructure and properties of the composites was studied in order to facilitate the follow-up study. Read More

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https://www.mdpi.com/1996-1944/12/8/1299
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http://dx.doi.org/10.3390/ma12081299DOI Listing
April 2019
1 Read

Physician-Patient Boundaries: Professionalism Training Using Video Vignettes.

MedEdPORTAL 2016 Jun 10;12:10412. Epub 2016 Jun 10.

Clinical Assistant Professor of Psychiatry, University of Vermont College of Medicine.

Introduction: The concept of professional boundaries is often not included in medical training. Historically, the field of psychiatry has given much consideration to the topic of boundaries, partially due to the high incidence of sexual boundary violations in psychotherapy practice. And while there is a perception that more formal education is needed in psychiatry, the pressure to adjust the frame of a treatment in clinical practice is ubiquitous. Read More

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http://dx.doi.org/10.15766/mep_2374-8265.10412DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6464555PMC

Temporal boundary of auditory event formation: An electrophysiological marker.

Int J Psychophysiol 2019 Apr 19. Epub 2019 Apr 19.

Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary. Electronic address:

The formation of auditory events requires integration between successive sounds. There is a temporal limit below which a single sound event is perceived while above which a second perceptual event is formed. Behavioral studies applying the Temporal Order Judgment paradigm showed that this boundary is between 20 and 70 ms. Read More

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http://dx.doi.org/10.1016/j.ijpsycho.2019.04.006DOI Listing

Improved Model Prediction of Glioma Growth Utilizing Tissue-Specific Boundary Effects.

Math Biosci 2019 Apr 19. Epub 2019 Apr 19.

Department of Neurosurgery, Mayo Clinic, Phoenix, AZ, USA.

Kinetic parameter estimates for mathematical models of glioblastoma multiforme (GBM), derived from clinical scans, have been used to predict the occurrence of hypoxia, necrosis, response to radiation therapy, and overall survival. Modeling GBM growth in a cerebral model encounters anatomical boundaries that interfere with model calibration from clinical measurements.

Methods: The effect of boundaries is examined on both spherically symmetric and anatomical models of tumor growth. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00255564173060
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http://dx.doi.org/10.1016/j.mbs.2019.04.004DOI Listing
April 2019
1 Read

Simulation of mass transfer in hollow fiber used for concentration of juices by osmotic distillation.

Authors:
Carlos Zambra

Heliyon 2019 Apr 9;5(4):e01458. Epub 2019 Apr 9.

Department of Mechanical Engineering, Universidad de Talca, Curicó, Chile.

A bi-dimensional diffusion mathematical model is proposed to study mass transfer in hollow fiber used for the concentration of juices by osmotic distillation (OD). The mathematical model was solved using the Finite Volume Method (FVM). The mass fraction at the boundaries was calculated by using the Functional-group Activity Coefficients (UNIFAC) method for the juice and by the Analytical Solutions Of Groups (ASOG) method for the brine. Read More

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http://dx.doi.org/10.1016/j.heliyon.2019.e01458DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6458469PMC

Transport and Loss of Ring Current Electrons Inside Geosynchronous Orbit During the 17 March 2013 Storm.

J Geophys Res Space Phys 2019 Feb 1;124(2):915-933. Epub 2019 Feb 1.

Los Alamos National Laboratory Los Alamos NM USA.

Ring current electrons (1-100 keV) have received significant attention in recent decades, but many questions regarding their major transport and loss mechanisms remain open. In this study, we use the four-dimensional Versatile Electron Radiation Belt code to model the enhancement of phase space density that occurred during the 17 March 2013 storm. Our model includes global convection, radial diffusion, and scattering into the Earth's atmosphere driven by whistler-mode hiss and chorus waves. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1029/2018JA026031
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http://dx.doi.org/10.1029/2018JA026031DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472511PMC
February 2019
1 Read

Marine Geophysical Investigation of the Chain Fracture Zone in the Equatorial Atlantic From the PI-LAB Experiment.

J Geophys Res Solid Earth 2018 Dec 14;123(12):11016-11030. Epub 2018 Dec 14.

Scripps Institution of Oceanography University of California, San Diego San Diego CA USA.

The Chain Fracture Zone is a 300-km-long transform fault that offsets the Mid-Atlantic Ridge. We analyzed new multibeam bathymetry, backscatter, gravity, and magnetic data with 100% multibeam bathymetric data over the active transform valley and adjacent spreading segments as part of the Passive Imaging of the Lithosphere Asthenosphere Boundary (PI-LAB) Experiment. Analyses of these data sets allow us to determine the history and mode of crustal formation and the tectonic evolution of the transform system and adjacent ridges over the past 20 Myr. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1029/2018JB015982
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http://dx.doi.org/10.1029/2018JB015982DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472653PMC
December 2018
1 Read

Balance of Emission and Dynamical Controls on Ozone During the Korea-United States Air Quality Campaign From Multiconstituent Satellite Data Assimilation.

J Geophys Res Atmos 2019 Jan 3;124(1):387-413. Epub 2019 Jan 3.

Atmospheric Chemistry Observations and& Modeling (ACOM) Laboratory National Center for Atmospheric Research Boulder CO USA.

Global multiconstituent concentration and emission fields obtained from the assimilation of the satellite retrievals of ozone, CO, NO, HNO, and SO from the Ozone Monitoring Instrument (OMI), Global Ozone Monitoring Experiment 2, Measurements of Pollution in the Troposphere, Microwave Limb Sounder, and Atmospheric Infrared Sounder (AIRS)/OMI are used to understand the processes controlling air pollution during the Korea-United States Air Quality (KORUS-AQ) campaign. Estimated emissions in South Korea were 0.42 Tg N for NO and 1. Read More

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http://dx.doi.org/10.1029/2018JD028912DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472638PMC
January 2019

WISHE-Moisture Mode in an Aquaplanet Simulation.

J Adv Model Earth Syst 2018 Oct 12;10(10):2393-2407. Epub 2018 Oct 12.

Centre for Atmospheric and Oceanic Sciences Indian Institute of Science Bangalore India.

This study aims to understand the nature of the tropical intraseasonal oscillations (ISOs) in an aquaplanet simulation performed using Geophysical Fluid Dynamics Laboratory's AM2.1 with a uniform sea surface temperature within the deep tropics. The simulated ISO resembles the observed Madden-Julian Oscillation in that the spectral peak in precipitation appears at zonal wave number 1 and a period of ~60 days. Read More

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http://dx.doi.org/10.1029/2018MS001441DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472665PMC
October 2018

Insights on Upper Mantle Melting, Rheology, and Anelastic Behavior From Seismic Shear Wave Tomography.

Geochem Geophys Geosyst 2018 Oct 24;19(10):3892-3916. Epub 2018 Oct 24.

Department of Earth Sciences Utrecht University Utrecht Netherlands.

In seismic tomography we map the wave speed structure inside the Earth, but we ultimately seek to interpret those images in terms of physical parameters. This is challenging because many parameters can with each other to produce a given wave speed. The problem is compounded by the convention of mapping seismic structures as perturbations relative to a 1-D reference model, rather than absolute wave speeds. Read More

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http://doi.wiley.com/10.1029/2017GC007370
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http://dx.doi.org/10.1029/2017GC007370DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472670PMC
October 2018
1 Read

Inclined convection in a porous Brinkman layer: linear instability and nonlinear stability.

Proc Math Phys Eng Sci 2019 Mar 13;475(2223):20180614. Epub 2019 Mar 13.

Dipartimento di Matematica e Informatica, Città Universitaria, Viale A. Doria 6, 95125 Catania, Italy.

In this article, we deal with thermal convection in an inclined porous layer modelled by the . Inertial effects are taken into account, and the physically significant rigid boundary conditions are imposed. This model is an extension of the work by Rees & Bassom (Rees & Bassom 2000 , 103-118 (doi:10. Read More

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http://dx.doi.org/10.1098/rspa.2018.0614DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6451983PMC

A method for generating virus-free cassava plants to combat viral disease epidemics in Africa.

Physiol Mol Plant Pathol 2019 Jan;105:77-87

Genetic Technologies International Limited (GTIL), P.O. Box 47430-00100, Nairobi, Kenya.

Here, we report a method to clean cassava plants from viral infections that cause cassava mosaic and brown streak diseases in Africa. Infected plants of resistant or tolerant varieties from Malawi, Mozambique, Kenya, Tanzania and Uganda were cleaned in the UK using a combination of tissue culture, chemotherapy and thermotherapy. In the first cycle of our virus-indexing procedure, we successfully cleaned 27 of the 31 varieties (87%), and after an additional three cleaning cycles, all plants were virus-free. Read More

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http://dx.doi.org/10.1016/j.pmpp.2018.09.002DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472600PMC
January 2019

Mantle Sources of Recent Anatolian Intraplate Magmatism: A Regional Plume or Local Tectonic Origin?

Tectonics 2018 Dec 15;37(12):4535-4566. Epub 2018 Dec 15.

Department of Earth Sciences Utrecht University Utrecht The Netherlands.

We present an extensive study of rehomogenized olivine-hosted melt inclusions, olivine phenocrysts, and chromian spinel inclusions to explore the link between geodynamic conditions and the origin and composition of Pliocene-Quaternary intraplate magmatism in Anatolia at Kula, Ceyhan-Osmaniye, and Karacadağ. Exceptional compositional variability of these products reveals early and incomplete mixing of distinct parental melts in each volcanic center, reflecting asthenospheric and lithospheric mantle sources. The studied primitive magmas consist of (1) two variably enriched ocean island basalt (OIB)-type melts in Kula; (2) both OIB-type and plume mid-ocean ridge basalt (P-MORB)-like melts beneath Toprakkale and Üçtepeler (Ceyhan-Osmaniye); and (3) two variably enriched OIB-type melts beneath Karacadağ. Read More

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http://dx.doi.org/10.1029/2018TC005219DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472637PMC
December 2018

Sensitivity Kernels of PP Precursor Traveltimes and Their Limitations for Imaging Topography of Discontinuities.

Geophys Res Lett 2019 Jan 23;46(2):698-707. Epub 2019 Jan 23.

Department of Earth Sciences Universiteit Utrecht Utrecht The Netherlands.

We analyze the sensitivity of PP precursor traveltimes that are often used to infer lateral variation in the depths of the 410- and 660-km discontinuities in the mantle. Previous results were inconclusive due to complex wave phenomena, such as multiple energy conversions and focusing/defocusing, that hamper their interpretation. Using spectral-element synthetics and Fréchet derivatives calculated with adjoint methods, we compute sensitivity kernels for volumetric and boundary parameters in a 1-D model for representative epicentral distances of past studies, and a dominant period of 11-25 s. Read More

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http://dx.doi.org/10.1029/2018GL081592DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472573PMC
January 2019

Application of intraoperative ultrasonography in retroperitoneal laparoscopic partial nephrectomy: A single-center experience of recent 199 cases.

Endosc Ultrasound 2019 Mar-Apr;8(2):118-124

Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Department of Urology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.

Objectives: To summarize the value and application experiences of intraoperative laparoscopic ultrasonography (ILUS) in retroperitoneal laparoscopic partial nephrectomy (RLPN).

Materials And Methods: From January 2013 to December 2018, RLPN with ILUS was performed on the recent 199 patients in our center (two patients received bilateral RLPN due to suspected malignancy of both right and left sides), and the relevant clinical and follow-up data were retrospectively reviewed. Among them, 119 patients were male and 80 were female; the age of patients was 53. Read More

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http://dx.doi.org/10.4103/eus.eus_15_19DOI Listing

Rap1b Promotes Notch-Signal-Mediated Hematopoietic Stem Cell Development by Enhancing Integrin-Mediated Cell Adhesion.

Dev Cell 2019 Apr 9. Epub 2019 Apr 9.

Department of Molecular Pathophysiology, Institute of Advanced Medical Sciences, Nippon Medical School, 1-396 Kosugi-machi, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan. Electronic address:

Hematopoietic stem cells (HSCs) emerge from hemogenic endothelium (HE) within the ventral portion of the dorsal aorta during vertebrate development. In zebrafish, Notch signaling induces HE specification from posterior lateral plate mesoderm (PLPM) cells as they migrate over the ventral surface of the somite. During migration, PLPM cells make close contact with Notch-ligand-expressing somitic cells to acquire HE identity. Read More

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http://dx.doi.org/10.1016/j.devcel.2019.03.023DOI Listing

Texture Identification by Bounded Integration of Sensory Cortical Signals.

Curr Biol 2019 Apr 12. Epub 2019 Apr 12.

Tactile Perception and Learning Lab, International School for Advanced Studies (SISSA), Via Bonomea 265, 34136 Trieste, Italy. Electronic address:

Recent work demonstrated that when a rat palpates a surface to identify its texture, signals generated by whisker kinematics are integrated by the brain, one touch at a time, until the accumulated evidence supports a well-grounded choice. The framework of decision making through bounded integration, previously attributed to primates, thus extends to rodents. In the present study, we ask whether vibrissal somatosensory cortex (vS1 and vS2) functions as the integrator of incoming evidence or, alternatively, as a relay of evidence to a downstream integrator. Read More

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http://dx.doi.org/10.1016/j.cub.2019.03.017DOI Listing

Rats Generate Vibrissal Sensory Evidence until Boundary Crossing Triggers a Decision.

Curr Biol 2019 Apr 12. Epub 2019 Apr 12.

Tactile Perception and Learning Lab, International School for Advanced Studies (SISSA), Via Bonomea 265, 34136 Trieste, Italy. Electronic address:

Behaviors in which primates collect externally generated streams of sensory evidence, such as judgment of random dot motion direction, are explained by a bounded integration decision model. Does this model extend to rodents, and does it account for behavior in which the motor system generates evidence through interactions with the environment? In this study, rats palpated surfaces to identify the texture before them, showing marked trial-to-trial variability in the number of touches prior to expressing their choice. By high-speed video, we tracked whisker kinematic features and characterized how they encoded the contacted texture. Read More

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http://dx.doi.org/10.1016/j.cub.2019.03.016DOI Listing

Postinfarction Myocardial Calcifications on Cardiac Computed Tomography.

Circ Arrhythm Electrophysiol 2019 May;12(5):e007023

Division of Cardiovascular Medicine (D.M.A., K.C.S., G.S.D., M.Y., M.N., F.M., F.B.), University of Michigan, Ann Arbor.

Background: Postinfarction ventricular tachycardia (VT) generally involves myocardial fibers surrounded by scar. Calcification of scar tissue has been described, but the relationship between calcifications within endocardial scar and VTs is unclear. The purpose of this study was to assess the prevalence of myocardial calcifications as detected by cardiac computed tomography (CT) and the benefit for mapping and ablation focusing on nontolerated VTs. Read More

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http://dx.doi.org/10.1161/CIRCEP.118.007023DOI Listing

Learn to segment single cells with deep distance estimator and deep cell detector.

Comput Biol Med 2019 Apr 8;108:133-141. Epub 2019 Apr 8.

Department of Computational and System Biology, University of Pittsburgh, Pittsburgh, PA, 15260, USA; UPMC-Hillman Cancer Center, University of Pittsburgh, Pittsburgh, 15232, PA, USA. Electronic address:

Single cell segmentation is a critical and challenging step in cell imaging analysis. Traditional processing methods require time and labor to manually fine-tune parameters and lack parameter transferability between different situations. Recently, deep convolutional neural networks (CNN) treat segmentation as a pixel-wise classification problem and have become a general and efficient method for image segmentation. Read More

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http://dx.doi.org/10.1016/j.compbiomed.2019.04.006DOI Listing
April 2019
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Five-year observation of aerosol optical properties and its radiative effects to planetary boundary layer during air pollution episodes in North China: Intercomparison of a plain site and a mountainous site in Beijing.

Sci Total Environ 2019 Mar 31;674:140-158. Epub 2019 Mar 31.

State Key Laboratory of Severe Weather (LASW) and Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, CMA, Beijing 100081, China.

The aerosol microphysical, optical and radiative properties of the whole column and upper planetary boundary layer (PBL) were investigated during 2013 to 2018 based on long-term sun-photometer observations at a surface site (~106 m a.s.l. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2019.03.418DOI Listing

Freeze-Dryer Equipment Capability Limit: Comparison of Computational Modeling with Experiments at Laboratory Scale.

J Pharm Sci 2019 Apr 17. Epub 2019 Apr 17.

School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, United States. Electronic address:

The equipment capability curve is one of the bounding elements of the freeze-drying design space and understanding it is critical to process design, transfer and scale-up. The second bounding element of the design space is the product temperature limit beyond which the product collapses. The high cost associated with freeze drying any product renders it crucial to operate using the most efficient cycle within the limits of the equipment and the product. Read More

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http://dx.doi.org/10.1016/j.xphs.2019.04.016DOI Listing

Stability analysis of a state-dependent delay differential equation for cell maturation: analytical and numerical methods.

J Math Biol 2019 Apr 19. Epub 2019 Apr 19.

Department of Mathematics and Statistics, University of Helsinki, 00014, Helsinki, Finland.

We consider a mathematical model describing the maturation process of stem cells up to fully mature cells. The model is formulated as a differential equation with state-dependent delay, where maturity is described as a continuous variable. The maturation rate of cells may be regulated by the amount of mature cells and, moreover, it may depend on cell maturity: we investigate how the stability of equilibria is affected by the choice of the maturation rate. Read More

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http://dx.doi.org/10.1007/s00285-019-01357-0DOI Listing

The critical Barkhausen avalanches in thin random-field ferromagnets with an open boundary.

Sci Rep 2019 Apr 19;9(1):6340. Epub 2019 Apr 19.

Brunel University London, Uxbridge Middlesex, UB8 3PH, UK.

The interplay between the critical fluctuations and the sample geometry is investigated numerically using thin random-field ferromagnets exhibiting the field-driven magnetisation reversal on the hysteresis loop. The system is studied along the theoretical critical line in the plane of random-field disorder and thickness. The thickness is varied to consider samples of various geometry between a two-dimensional plane and a complete three-dimensional lattice with an open boundary in the direction of the growing thickness. Read More

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http://dx.doi.org/10.1038/s41598-019-42802-wDOI Listing

Soft High-Resolution Neural Interfacing Probes: Materials and Design Approaches.

Nano Lett 2019 Apr 24. Epub 2019 Apr 24.

Center for Nanoparticle Research , Institute for Basic Science (IBS) , Seoul 08826 , Republic of Korea.

Neural interfacing probes are located between the nervous system and the implanted electronic device in order to acquire information on the complex neuronal activity and to reconstruct impaired neural connectivity. Despite remarkable advancement in recent years, conventional neural interfacing is still unable to completely accomplish these goals, especially in long-term brain interfacing. The major limitation arises from physical and mechanical differences between neural interfacing probes and neural tissues that cause local immune responses and production of scar cells near the interface. Read More

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http://pubs.acs.org/doi/10.1021/acs.nanolett.8b04895
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http://dx.doi.org/10.1021/acs.nanolett.8b04895DOI Listing
April 2019
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Religious and spiritual struggles, religiousness, and alcohol problems among undergraduates.

J Prev Interv Community 2019 Apr 19:1-16. Epub 2019 Apr 19.

b Bowling Green State University , Bowling Green , OH , USA.

Theoretically, religion/spirituality may protect against alcohol problems or facilitate recovery. However, challenges can arise in religious/spiritual life that may contribute to or complicate alcohol problems. Emerging adults often experience difficult transitions from family environments to independent membership in academic communities straddling the legal drinking age boundary. Read More

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https://www.tandfonline.com/doi/full/10.1080/10852352.2019.1
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http://dx.doi.org/10.1080/10852352.2019.1603678DOI Listing
April 2019
2 Reads