5,700 research outputs found
Energy transfers in small-scale and large-scale dynamos
No full textWe study energy transfers during magnetic energy growth in small-scale and large-scale dynamos. We perform direct numerical simulations for magnetic Prandtl number Pm =20 and 0.2 in a periodic box on 1024^3 grid. Energy fluxes and shell-to-shell energy transfers indicate that in small-scale dynamo for Pm =20, the magnetic energy growth takes place due to a non-local energy transfer from large-scale velocity field to small-scale magnetic field. On the other hand, in large-scale dynamo for Pm =0.2, local energy transfers from large-scale velocity field to large-scale magnetic field takes place
LAGOS-AND-PM: A Large Gold Standard Dataset for PubMed Author Name Disambiguation
No full textLAGOS-AND-PM is an author name disambiguation (AND) dataset for the PubMed database, containing several versions, and they are built based on the ORCID database and the PubMed literature database.
Note that we have previously created another dataset named LAGOS-AND, which refers to a series of AND datasets created for the MAG/OpenAlex database
Higher-order Network Analysis of Fine Particulate Matter (PM 2.5) Transport in China at City Level
No full textabstract: Specification of PM[subscript 2.5] transmission characteristics is important for pollution control and policymaking. We apply higher-order organization of complex networks to identify major potential PM[subscript 2.5] contributors and PM[subscript 2.5] transport pathways of a network of 189 cities in China. The network we create in this paper consists of major cities in China and contains information on meteorological conditions of wind speed and wind direction, data on geographic distance, mountains, and PM[subscript 2.5] concentrations. We aim to reveal PM[subscript 2.5] mobility between cities in China. Two major conclusions are revealed through motif analysis of complex networks. First, major potential PM[subscript 2.5] pollution contributors are identified for each cluster by one motif, which reflects movements from source to target. Second, transport pathways of PM[subscript 2.5] are revealed by another motif, which reflects transmission routes. To our knowledge, this is the first work to apply higher-order network analysis to study PM[subscript 2.5] transport.The final version of this article, as published in Scientific Reports, can be viewed online at: http://www.nature.com/articles/s41598-017-13614-
Changes in white matter microstructure during adolescence
No full textPostmortem histological studies have demonstrated that myelination in human brain white matter (WM) continues throughout adolescence and well into adulthood. We used in vivo diffusion-weighted magnetic resonance imaging to test for age-related WM changes in 42 adolescents and 20 young adults. Tract-Based Spatial Statistics (TBSS) analysis of the adolescent data identified widespread age-related increases in fractional anisotropy (FA) that were most significant in clusters including the body of the corpus callosum and right superior corona radiata. These changes were driven by changes in perpendicular, rather than parallel, diffusivity. These WM clusters were used as seeds for probabilistic tractography, allowing us to identify the regions as belonging to callosal, corticospinal, and prefrontal tracts. We also performed voxel-based morphometry-style analysis of conventional T1-weighted images to test for age-related changes in grey matter (GM). We identified a cluster including right middle frontal and precentral gyri that showed an age-related decrease in GM density through adolescence and connected with the tracts showing age-related WM FA increases. The GM density decrease was highly significantly correlated with the WM FA increase in the connected cluster. Age-related changes in FA were much less prominent in the young adult group, but we did find a significant age-related increase in FA in the right superior longitudinal fascicle, suggesting that structural development of this pathway continues into adulthood. Our results suggest that significant microstructural changes in WM continue throughout adolescence and are associated with corresponding age-related changes in cortical GM regions
Evaluation of effects of geometrical parameters on density distribution in compaction of PM gears
No full textThe usage of powder metallurgy (PM) for manufacturing of transmission components in automotive industries has been studied by many researchers. PM components have become of interest in recent years due to advancements in post processing possibilities such as hot isostatic pressing (HIP). Still in many of the forming process routes for making components from PM materials, the compaction of the powder into green component is the first step. Compaction is required to put the powder into the near net shape of the desired component and it causes a density gradient in the body of the green component. Basically the friction between powder particles and between the powder particles and die walls are the well-known roots for such density gradients in the compacted component. Looking at forming of PM gears, the gradient in density is one of the most important roots of problems in the processing of PM gears as well. That is because making a gear with full density and no pores will be very costly if large density gradients exist in the green component. The purpose of this study is to find the possible relations between the gear geometry and the density gradients in the green component after compaction in addition to the friction effects. For this purpose several gears should be tested. To reduce the research costs, the finite element (FE) method is used. First a FE model of the compaction process is developed and verified. To investigate the relations between the density gradients and the gear parameters such as addendum diameter (da) and the face width (b) several gear geometries have been studied. The compaction of selected gears is simulated using the FE model. The simulations results which are the distribution of density in the green component are evaluated and discussed and conclusion are made based on them.</p
WSFA audiovisual item A072.0012
No full textThe following notes accompany the original tape: N-S-550 // Watkins / Contempt / Todd Rod; Legislative Status; Johnny Harris Demonstration NOON; Johnny Harris Demonstration 6 pm; Lowndes County Begins Layoffs; Watkins / Todd Road / Contempt NOON; Anti - Social Security Meeting in P'Ville 10 pm; Knox House / Move - In; Judge Hobbs "Rules" Election Suit; Harris Re - Trial Begins In Bay Minette; Dye Pre Season News Conference 10 pm; Consume Watch / U of Ala Econ Report; Dye Pre Season 6 pm; Jerry Thompson "Not Guilty"; Patillo Suit; Dog Racing / Macon County Schools 6 pm; Dog Racing / Macon County Schools 10 pm; John Glenn In Montgomery Lois First Live; Gypsy Robbery; John Glenn 10 pm; City Council / Watkins & Folmar Again 10 pm; City Council Redistricting 10 pm; Good Sam Ministries 10 pm; Arban Hiring; APTN Towers Grant / Inspection; Grandview Pines Rate Increase; Wallace Gets News Wheelchair; Dannally Gets New Radar; Prison Implementation Committee / Smith 6 pm; Prison Implementation Committee / Smith 10 pm; Nuke Freeze Forum; Prison Implementation Meet NOON; Chuck Lynn Bodybuilder; Commodities Conference / Grain Negotiator 6 pm; Commodities Conference / Grain Negotiator 10 pm; Troy Election Suit NOON; Harris Demonstration at A.G. Office; Troy Election Suit; Medical Supplies Found in Dumpster; Barrett / Segregationalist NOON; Barrett / Segregationalist 6 pm; Barrett / Segregationalist 10 pm; Wallace Add Movie / ESPO / Dog Track / Etc; Wallace Jr Flies F-4; Window Tinting Made Illegal; Buddy Cox on New Waste Site Found NOON; Walt Frazier At ASU Camp 6 pm & 10 pm; Buddy Cox on New Waste Site Dump 6 pm; Prison Implem. Committee Report 6 pm; Prison Implem. Committee Report 10 pm; Mobile Jail Overcrowded; Harris Trial Continues; Consumer Watch / Phone Installation; Watkins Support Rally 10 pm; Folmar Signs Affidavit / Police Firings; Wilkinson Hearing // Label on case says "Glenn Visit New Sheet Chair
10 am – 2 pm + 6 pm – 10 pm. Work efficiency and quality of life of people working in Polish repertory theatres
No full textThe article focuses on the system of theatre work from 10 am to 2 pm and from 6 pm to 10 pm. This system appears to be some sort of legacy, something that has been functioning ‘for ages’, something unalterable, even traditional. Thus, it is habitual, invisible and intuitive, monopolistic for the discourse. It is due to these characteristics that this system of work requires a careful examination. The article discusses the results of a survey conducted by the author in which respondents assessed the effectiveness of the traditional work system and their quality of life in connection with work
A MEMS Coriolis-Based Mass-Flow-to-Digital Converter with 100g/h/surdHz Noise i Floor and Zero Stability of pm 0.35mg/h
No full textFlow sensors with high resolution (<200g/h/surdHz) and low offset drift (<pm 0.4mg/h) are essential in many microfluidic applications, such as flow cytometry and biological/chemical assays. Although thermal flow sensors can meet these specifications [1], [2], they measure flow velocity, so their calibration is fluid specific. Coriolis flow sensors [3]-[5] are a promising alternative because they measure mass flow and density regardless of fluid type, thus offering more flexibility. However, this has typically been at the expense of lower resolution, offset drift, and large footprint. This paper presents a mass-flow-to-digital converter (phi DC) based on a MEMS Coriolis mass flow sensor and a dedicated readout IC (ROIC). Compared to the state-of-the-art [5], it is more compact and has a digital output. Furthermore, it achieves a 3x improvement in resolution (100 g/h/ surd Hz) and a more than 2 ×improvement in zero stability (pm 0.35mg/h.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
WSFA audiovisual item A073.0001
No full textThe following notes accompany the original tape: N-S-565 // Ft. Rucker Honduras Lift Off; Wallace / Koreans Pre Wallace Trip; Wallace / Koreans Pre Wallace Raw Video; Evans Watkins News Conferences; Cashin Arraigned In B'Ham; Dickinson Goes to Lebanon; Eufaula Readies for J.D.; ASU / Randolph; Folmar / WHHY 6 & 10; Coke Hearing 6 pm; PSC / Busses; Food Price Survey / Generic Grocery; ASEA; Wallace Locked Out of Car; Watkins / Will Talk to Grand Jury; Folmar / WHHY NOON; Auburn Leaves for Tenn.; Alabama / Pre Vandy; J.D. / Eufuala; Maxwell Carnival; Randolph Resigns; Evans / Watkins; P'Ville Fire; State Employees Meeting; Thompson / Haircut; Histoplasmosis 6 pm; Histoplasmosis 10 pm; Auburn / Tennessee; JD / Eufuala (Sat); What's On Your Mind (Pts 1, 2, 3); Continental / Local Strike Reax; Realtors / Economy Plank; Bama / Auburn Football Recap // Label on case says "Food Stuff 14:11 :40
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