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A Meshless and Matrix-Free Approach to Modeling Turbulent Fluid Flow Dedicated to Professor Karl Stark Pister for his 95th birthday

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Computer Modeling in Engineering & Sciences 2021年第12期129卷 1373-1393页

作者： matthew Wilkinson Javier Villarreal Andrew Meade William Marsh Rice University HoustonTexas77251-1892USA

A meshless and matrix-free fluid dynamics solver(SOMA)is introduced that avoids the need for user generated and/or analyzed grids,volumes,and *** building of the approximation avoids creation and inversion of possibly dense block diagonal matrices and significantly reduces user *** results are presented from the application of SOMA to subsonic,compressible,and turbulent flow over an adiabatic flat plate.

关键词： Mesh free Navier-stokes turbulent flow machine learning

Perikinetics and sludge study for the decontamination of petroleum produced water(PW) using novel mucuna seed extract

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Petroleum Science 2016年第2期13卷 328-339页

作者： matthew Menkiti Ifechukwu Ezemagu Bernard Okolo Water Resources Center Department of Civil and Environmental EngineeringTexas Tech University Department of Chemical Engineering Nnamdi Azikiwe University Department of Chemical Engineering Michael Okpara University of Agriculture

In this study, Mucuna flagellipes seed extract was applied in the coagulation-flocculation of produced water （PW）. Process parameters such as pH, dosage, and settling time were investigated. Process kinetics was also studied. Instrumental characterization of mucuna seed （MS）, mucuna seed coagulant （MSC）, and post effluent treatment settled sludge （PTSS） were carried out. The optimum decontamination efficiency of 95 % was obtained at 1 g/L MSC dosage, PW pH of 2, and rate constant of 0.0001 （L/g/s）. Characterization results indicated that MS, MSC, and PTSS were of network structure, primitive lat- tice, and thermally stable. It could be concluded that MSC would be potential biomass for the treatment of produced water under the experimental conditions.

关键词： Mucuna seed Produced water Coagulationflocculation Sludge Perikinetics

On the evolution of terrestrial planets:Bi-stability,stochastic effects,and the non-uniqueness of tectonic states

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Geoscience Frontiers 2018年第1期9卷 91-102页

作者： matthew B.Weller Adrian Lenardic Institute for Geophysics University of Texas at AustinUSA Lunar and Planetary Institute HoustonTXUSA Department of Earth Science Rice UniversityHoustonTX 77005USA

The Earth is the only body in the solar system for which significant observational constraints are accessible to such a degree that they can be used to discriminate between competing models of Earth's tectonic *** is a natural tendency to use observations of the Earth to inform more general models of planetary ***,our understating of Earth's evolution is far from *** recent years,there has been growing geodynamic and geochemical evidence that suggests that plate tectonics may not have operated on the early Earth,with both the timing of its onset and the length of its activity far from ***,the potential of tectonic bi-stability(multiple stable,energetically allowed solutions)has been shown to be dynamically viable,both from analytical analysis and through numeric experiments in two and three *** indicates that multiple tectonic modes may operate on a single planetary body at different times within its temporal *** also allows for the potential that feedback mechanisms between the internal dynamics and surface processes(e.g.,surface temperature changes driven by long term climate evolution),acting at different thermal evolution times,can cause terrestrial worlds to alternate between multiple tectonic states over giga-year *** implication within this framework is that terrestrial planets have the potential to migrate through tectonic regimes at similar‘thermal evolution times'(e.g.,points were they have a similar bulk mantle temperature and energies),but at very different'temporal times'(time since planetary formation).It can be further shown that identical planets at similar stages of their evolution may exhibit different tectonic regimes due to random ***,we will discuss constraints on the tectonic evolution of the Earth and present a novel framework of planetary evolution that moves toward probabilistic arguments based on general physical principals,as opposed to particular rheol

关键词： Planetary interiors Mantle convection Lid-state Bi-stability Thermal evolution

Male mate choice as differential investment in contest competition is affected by female ornament expression

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Current Zoology 2018年第3期64卷 335-344页

作者： Stacey L. WEISS matthew DUBIN Department of Biology University of Puget Sound 1500 N. Warner Street No. 1088 Tacoma WA 98418-1088 USA

High male mating effort and high variation in female quality select for male mate choice, which may be expressed as differential investment of reproductive effort based on female value. Male reproductive effort includes investment in direct contest competition with rival males for access to females, yet variation in male-male contest behavior is rarely examined in the context of male mate choice. We examine such male response to variation in female body size, reproductive state, and female-specific ornamentation in the striped plateau lizard, Sceloporus virgatus. We housed lizards in trios of 2 size-matched males and one female for 5 days, such that all 3 lizards were physi- cally isolated and the males could see the female but not each other. We then placed males simultaneously into the female＇s cage and scored the interaction. Male-male aggression was not significantly affected by female body size, reproductive state, nor ornament color, but was influenced by ornament size which reliably signals the phenotypic quality of the female and her off- spring. In the presence of larger-ornamented females, males engaged in more male-male aggressive display behavior more quickly, and performed fewer high-intensity contact behaviors but were equally likely to escalate to this riskier level of fighting. Our data suggest that males adjust their energetic investment during intrasexual competitive interactions in response to variation in the contested female which, assuming males gain direct or indirect benefits from their strategic allocation of reproductive effort, fits the modern understanding of male mate choice.

关键词： aggression female-specific ornaments intrasexual competition lizards resource quality sexual selection

Transcript profiling of a novel plant meristem,the monocot cambium

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Journal of Integrative Plant Biology 2017年第6期59卷 436-449页

作者： matthew Zinkgraf Suzanne Gerttula Andrew Groover US Forest Service Pacific Southwest Research StationDavisCaliforniaUSA Department of Computer Science University of CaliforniaDavisUSA Department of Plant Biology University of CaliforniaDavisUSA

While monocots lack the ability to produce a vascular cambium or woody growth, some monocot lineages evolved a novel lateral meristem, the monocot cambium, which supports secondary radial growth of stems. In contrast to the vascular cambium found in woody angiosperm and gymnosperm species, the monocot cambium produces secondary vascular bundles, which have an amphivasal organization of tracheids encircling a central strand of phloem. Currently there is no information concerning the molecular genetic basis of the develop- ment or evolution of the monocot cambium. Here we report high-quality transcriptomes for monocot cambium and early derivative tissues in two monocot genera, Yucca and Cordyline. Monocot cambium transcript profiles were compared to those of vascular cambia and secondary xylem tissues of two forest tree species, Populus trichocarpa and Eucalyptus grandis. Monocot cambium transcript levels showed that there are extensive overlaps between the regulation of monocot cambia and vascular cambia. Candidate regulatory genes that vary between the monocot and vascular cambia were also identified, and included members of the KANADI and CLE families involved in polarity and cell-cell signaling, respectively. We suggest that the monocot cambium may have evolved in part through reactivation of genetic mechanisms involved in vascular cambium regulation.

关键词： Chun-Ming Liu, Institute of Crop Science, CAAS, ChinaReceived Feb. 18, 2017 Accepted Mar. 15, 2017 Online on Mar. 17,2017

Domestication and crop evolution of wheat andbarley: Genes, genomics, and future directions

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Journal of Integrative Plant Biology 2019年第3期61卷 204-225页

作者： matthew Haas Mona Schreiber Martin Mascher Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben Palaeogenetics Group Institute of Organismic and Molecular Evolution Johannes Gutenberg University Mainz German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig

Wheat and barley are two of the founder crops of the agricultural revolution that took place 10,000 years ago in the Fertile Crescent and both crops remain among the world's most important crops. Domestication of these crops from their wild ancestors required the evolution of traits useful to humans, rather than survival in their natural environment. Of these traits, grain retention and threshability, yield improvement, changes to photoperiod sensitivity and nutritional value are most pronounced between wild and domesticated forms. Knowledge about the geographical origins of these crops and the genes responsible for domestication traits largely pre-dates the era of nextgeneration sequencing, although sequencing will lead to new insights. Molecular markers were initially used to calculate distance(relatedness), genetic diversity and to generate genetic maps which were useful in cloning major domestication genes. Both crops are characterized by large,complex genomes which were long thought to be beyond the scope of whole-genome sequencing. However, advances in sequencing technologies have improved the state of genomic resources for both wheat and barley. The availability of reference genomes for wheat and some of its progenitors,as well as for barley, sets the stage for answering unresolved questions in domestication genomics of wheat and barley.

关键词： Domestication Wheat barley

Studying the ＂fly factor＂ phenomenon and its underlying mechanisms in house flies Musca domestica

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Insect Science 2018年第1期25卷 137-147页

作者： matthew V. Holl Gerhard Gries Department of Biological Sciences Simon Fraser University Bumaby British Columbia V5A 1S6 Canada

The ＂fly factor＂ was first discovered 〉60 years ago and describes the phe- nomenon that food currently or previously fed on by flies attracts more foraging flies than the same type and amount of food kept inaccessible to flies. Since then, there has been little progress made to understanding this phenomenon. Our objectives were （i） to demonstrate the existence of the fly factor in house flies, Musca domestica and （ii） to study underlying mechanisms that may cause or contribute to the fly factor. In 2-choice laboratory bioassays, we obtained unambiguous evidence for a fly factor phenomenon in house flies, in that we demonstrated that feeding flies are more attractive to foraging flies than are nonfeeding flies, and that fed-on food is more attractive to foraging flies than is ＂clean＂ food. Of the potential mechanisms （fly excreta, metabolic output parameters [elevated temperature, relative humidity, carbon dioxide]）, causing the fly factor, fly feces, and regurgitate do at- tract foraging flies but none of the metabolic output parameters of feeding flies does. Even though feeding flies produce significantly more CO2 than nonfeeding flies, elevated levels of CO2 have no behavior-modifying effect on flies. Preferential attraction of house flies to fly feces and regurgitate indicates that the flies sense airborne semiochemicals emana- ting from these sources. Hypothesizing that these semiochemicals are microbe-produced, future studies will aim at isolating and mass producing these microbes to accumulate semiochemicals for identification.

关键词： fly factor foraging metabolic output microbes Musca domestica semio-chemical attractants

The modern testicular prosthesis:patient selection and counseling,surgical technique,and outcomes

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Asian Journal of Andrology 2020年第1期22卷 64-69页

作者： Solomon Hayon Jamie Michael R matthew Coward Department of Urology University of North Carolina School of MedicineChapel HillNC 27500-7235USA University of North Carolina School of Medicine Chapel HillNC 27500-7235USA

The testicular prosthesis can be an afterthought for providers when performing an orchiectomy for testicular cancer,torsion,atrophic testis,or ***,data suggest that patients find the offer of a testicular prosthesis and counseling regarding placement to be extremely important from both a pragmatic and a psychosocial *** two-thirds of men undergoing orchiectomy are offered an implant at the time of orchiectomy and of those offered about one-third move forward with prosthesis *** relatively low acceptance rate is in stark contrast with high patient satisfaction and low complication rates for those who undergo the *** most common postoperative patient concerns are minor and involve implant positioning,size,and ***,we provide an up-to-date review of modern preoperative evaluation,patient selection,expectation management,surgical technique,and expected outcomes for testicular prostheses.

关键词： anorchia orchiectomy patient satisfaction prostheses and implants testicular neoplasms testis

Mass Transport in Nanowire Synthesis:An Overview of Scalable Nanomanufacturing

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Journal of Materials Science & Technology 2015年第6期31卷 523-532页

作者： matthew J.Crane Peter J.Pauzauskie Department of Chemical Engineering University of WashingtonSeattleWA 98195-1750.USA Department of Materials Science & Engineering Seattle.WA 98195-2120USA Fundamental Computational Science Directorate Pacific Northwest National LaboratoryRichland.WAUSA

The ability to rationally engineer the growth and nanomanufacturing of one-dimensional nanowires in high volumes has the potential to enable applications of nanoscale materials in a diverse range of fields including energy conversion and storage,catalysis,sensing,medicine,and information *** review provides a roadmap for the development of large-scale nanowire *** myriad techniques exist for bench-scale nanowire synthesis,these growth strategies typically fall within two major categories:1) anisotropically-catalyzed growth and 2) confined,template-based ***,comparisons between growth methods with different mass transport pathways have led to confusion in interpreting observations,in particular Gibbs-Thomson *** review mass transport in nanowire synthesis techniques to unify growth models and to allow for direct comparison of observations across different *** addition,we discuss the applicability of nanoscale,Gibbs-Thomson effects on mass transport and provide guidelines for the development of new growth *** explore the scalability of these complex processes with dimensionless numbers and consider the effects of pressure,temperature,and precursor material on nanowire growth.

关键词： Nanowire Mass transport Modeling Scalable growth