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Estimating underground mine ventilation friction factors from low density 3D data acquired by a moving LiDAR

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International Journal of Mining Science and Technology 2018年第4期28卷 650-655页

作者： Curtis watson Joshua Marshall Mining Systems Laboratory The Robert M.Buchan Department of Mining Queen's University

Ventilation system analysis for underground mines has remained mostly unchanged since the Atkinson method was made popular by Mc Elroy in 1935. Data available to ventilation technicians and engineers is typically limited to the quantity of air moving through any given heading. Because computer-aided modelling, simulation, and ventilation system design tools have improved, it is now important to ensure that developed models have the most accurate information possible. This paper presents a new technique for estimating underground drift friction factors that works by processing 3 D point cloud data obtained by using a mobile Li DAR. Presented are field results that compare the proposed approach with previously published algorithms, as well as with manually acquired measurements.

关键词： Mine ventilation Mine design Mobile mapping Roughness estimation Friction factors LiDAR3D point clouds

Calorimetry is not color-blind. Molecular insights on association processes in surfactant-polymer mixtures derived from calorimetric experiments

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Science China Chemistry 2011年第12期54卷 2024-2027页

作者： LOH watson BRINATTI Cesar Institute of Chemistry Universidade Estadual de Campinas(UNICAMP)

This comment will review and discuss recent results obtained with the use of calorimetry in assessing molecular information from complex phenomena such as association in surfactant/polymer mixtures. These examples were selected to support the view that it is possible to ally the great sensitivity of modem calorimeters with carefully planned experiments and, sometimes, ancillary techniques in order to derive detailed information on molecular interactions.

关键词： calorimetry polymer-surfatant interaction self-assembly

High resolution tracking of adult horseshoe crabs Limulus polyphemus in a New Hampshire estuary using fixed array ultrasonic telemetry

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Current Zoology 2010年第5期56卷 599-610页

作者： Winsor H.watson Ⅲ Christopher C.CHABOT Department of Biological Sciences University of New Hampshire Department of Biology Plymouth State University

While several studies have documented the large-scale, seasonal movements of horseshoe crabs, little is known about their fine-scale, daily movement patterns. In this study we used a fixed array ultrasonic telemetry system to track the movements of 12 male and 16 female horseshoe crabs in the Great Bay estuary, New Hampshire. Data were obtained during the mating season, as well as during the remainder of the summer and fall, in the years 2005-2008. During the mating season animals were often, but not always, active during the high tides when they were approaching and leaving the spawning beaches. On average, both males and females approached mating beaches during 33% of the high tides they experienced and they most often made the tran- sition from being inactive to active during the last two hours of an incoming tide. From April-October horseshoe crabs were significantly more active during high tide periods vs low tide periods, with no clear preference for diurnal vs nocturnal activity. After the mating season ended horseshoe crabs continued to move into shallower water at high tide and then return to deeper water at low tide. Observations by SCUBA divers suggest that during these excursions into the mudflats horseshoe crabs were digging pits in the sediment while foraging for food. Thus, the tidal rhythm of activity that has been so well documented during the mating season probably persists into the fall, and primarily involves foraging activities

关键词： Telemetry Tracking Movements Mating Foraging Estuary

Amarts on Riesz Spaces

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Acta Mathematica Sinica,English Series 2008年第2期24卷 329-342页

作者： Coenraad C.A. LABUSCHAGNE Bruce A.watson School of Mathematics University of the Witwatersrand Private Bag 3 P O WITS 2050 South Africa

The concepts of conditional expectations, martingales and stopping times were extended to the Riesz space context by Kuo, Labuschagne and watson （Discrete time stochastic processes on Riesz spaces, Indag. Math.,15（2004）, 435-451）. Here we extend the definition of an asymptotic martingale （amart） to the Riesz spaces context, and prove that Riesz space amarts can be decomposed into the sum of a martingale and an adapted sequence convergent to zero. Consequently an amart convergence theorem is deduced.

关键词： amart martingale Riesz space Banach lattice

Development of a database for the prediction of phases in Pt-based Superalloys:Cr-Pt-Ru

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Rare Metals 2006年第5期25卷 597-607页

作者： A.watson L.A.Cornish R.Süss Institute for Materials Research School of ProcessMaterials and Environmental EngineeringUniversity of LeedsLeedsUK Advanced Materials Division MintekPrivate Bag X3015Randburg2125South AfricaDST/NRF Centre of Excellence for Strong MaterialsUniversity of the WitwatersrandJohannesburg2025South Africa Advanced Materials Division MintekPrivate Bag X3015Randburg2125South AfricaDST/NRF Centre of Excellence for Strong MaterialsUniversity of the WitwatersrandJohannesburg2025South Africa School of Chemical and Metallurgical EngineeringUniversity of the WitwatersrandJohannesburg2025South Africa

Work has been ongoing in building a thermodynamic database for the prediction of phase equilibria in Pt-based superalloys. The alloys are being developed for high texture applications in aggressive environments. The database will aid the design of alloys by enabling the calculation of the composition and proportions of phases present in alloys of different compositions. In order to extend this database, a preliminary assessment of the Cr-Pt-Ru system has been undertaken, using a combination of Pandat and MTDATA software. As a first step, it was necessary to provide thermodynamic models for the three associated binary systems. Owing to a lack of thermodynamic information for these systems, the binary assessments were based on phase diagrams available in the literature. Using recent experimental phase equilibria data for the ternary system, a preliminary assessment of the Cr-Pt-Ru system has been produced. In this preliminary assessment, simplified models were employed for the L12 and sigma phases with a view to extending the descriptions as new experimental information becomes available.

关键词： Cr-Pt-Rh thermodynamics assessment phase diagram

Physico-mechanical characteristics of bast fibres of Sesamum indicum and Sesamum radiatum for bioprospecting

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Journal of Bioresources and Bioproducts 2022年第4期7卷 306-319页

作者： Ancy S watson Suhara Beevy S Department of Botany University of KeralaThiruvananthapuram 695581KeralaIndia

Natural fibres are renewable,inexpensive and biodegradable sources of sustainable materials from plants or *** fibres,as the notable natural fibres,are gathered from the outer cell layers of the stem of *** and young bast fibres from two species of Sesamum,namely Sesamum indicum *** *** Schumach.&*** extracted through traditional water retting technique and analyzed for their physical,mechanical and chemical *** studies revealed polygon shaped phloem(bast fibre)cells with small lumen were similar to jute,in terms of architecture,and bagasse,in terms of lumen *** extraction and subsequent drying,the young stems of *** were found to yield more bast fibres by mass compared with the rest of the Sesamum samples,that was,0.59 g(dry weight)of bast fibres from 100 g(fresh weight)of *** to stereo microscopic images,the mature *** fibres had rougher edges than the *** *** and *** fibre surfaces also seemed to have pores,according to scanning electron microscopy(SEM)*** porosity appeared to get more pronounced as the plants got *** Sesamum bast fibres were also found to be extremely hydrophilic with a high-water retention *** fibres obtained from *** were determined to be suitable for the textile industry due to their light colour,ideal diameter and length,and water-holding capacity that matched the requirements of fabric *** in the absence of a mordant,the mature fibres showed a significant degree and evenness of Alizarin dye attachment,which might be correlated to the increase in fibre surface roughness with fibre *** fibres were also discovered to be comparable with jute in terms of phloem cell shape(polygonal),diameter(13-15 m),tenacity(12.86-32.54 gf/(g·km-1)),and linear density(2.5-3.3 g/km).It suggested that they might find industrial applications if further research were to be done.

关键词： Sesamum Bast fibre Textile Tensile strength Dyeing Sustainability

Advances in In Vitro and In Vivo Bioreactor-Based Bone Generation for Craniofacial Tissue Engineering

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Biomedical Engineering Frontiers 2023年第1期4卷 203-216页

作者： Emma watson Antonios G.Mikos Department of Bioengineering Rice UniversityHoustonTX 77030USA

Craniofacial reconstruction requires robust bone of specified geometry for the repair to be both functional and *** native bone from elsewhere in the body can be harvested,shaped,and implanted within a defect,using either an in vitro or in vivo bioreactors eliminates donor site morbidity while increasing the customizability of the generated *** vitro bioreactors utilize cells harvested from the patient,a scaffold,and a device to increase mass transfer of nutrients,oxygen,and waste,allowing for generation of larger viable *** vivo bioreactors utilize the patient’s own body as a source of cells and of nutrient transfer and involve the implantation of a scaffold with or without growth factors adjacent to vasculature,followed by the eventual transfer of vascularized,mineralized tissue to the defect *** different models of in vitro bioreactors exist,and several different implantation sites have been successfully utilized for in vivo tissue generation and defect repair in *** this review,we discuss the specifics of each bioreactor strategy,as well as the advantages and disadvantages of each and the future directions for the engineering of bony tissues for craniofacial defect repair.

关键词： defect implantation utilize

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Wooden Radio

Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2020年第3期14卷 424-433页

作者： SU Tong Honey watson 不详 Department of Comparative Literature New York UniversityNew YorkNY 10003USA

Doctor Mo held a black cotton umbrella in his hand as he passed beneath the overpass.A metallic eruption came from overhead and the umbrella's handle shook in his palms while he lowered its canopy,running out from the other side of the bridge as he *** looked up to see a black freight train passing along the tracks,its sections either covered by tarpaulin or pain ted with white codes flashing before his eyes,a breath of wind rolli ng along beside them as they went.

关键词： beneath handle passing

Binding interaction of typical emerging contaminants on Gobiocypris rarus transthyretin: an in vitro and in silico study

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FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 2024年第11期18卷 135页

作者： Li, Xiangqiao Liu, Huihui Zhao, Songshan watson, Peter Yang, Xianhai Nanjing Univ Sci & Technol Sch Environm & Biol Engn Jiangsu Key Lab Chem Pollut Control & Resources Re Nanjing 210094 Peoples R China Los Alamos Natl Lab Los Alamos NM 87545 USA

Emerging contaminants (ECs) have drawn global concern, and the endocrine disrupting chemicals is one of the highly interested ECs categories. However, numerous ECs lacks the basic information about whether they can disturb the endocrine related biomacromolecules or elicit endocrine related detrimental effects on organism. In this study, the potential binding affinity and underlying binding mechanism between 29 ECs from 7 chemical groups and Gobiocypris rarus transthyretin (CrmTTR) are investigated and probed using in vitro and in silico methods. The experimental results demonstrate that 14 selected ECs (11 disinfection byproducts, 1 pharmaceuticals and personal care product, 1 alkylphenol, 1 perfluoroalkyl and polyfluoroalkyl substance) are potential CrmTTR binders. The CrmTTR binding affinity of three ECs (i.e., 2,6-diiodo-4-nitrophenol (logRP(T-4) = 0.678 +/- 0.198), 2-bromo-6-chloro-4-nitrophenol (logRP(T-4) = 0.399 +/- 0.0908), tetrachloro-1,4-benzoquinone (logRP(T-4) = 0.272 +/- 0.0655)) were higher than that of 3,3 ',5,5 '-tetraiodo-L-thyronine, highlighting that more work should be performed to reveal their potential endocrine related harmful effects on Gobiocypris rarus. Molecular docking results imply that hydrogen bond and hydrophobic interactions are the dominated non-covalent interactions between the active disruptors and CrmTTR. The optimum mechanism-based (for CrmTTR), and high throughput screening (for CrmTTR, little skate-TTR, seabream-TTR, and human-TTR) binary classification models are developed using three machine learning algorithms, and all the models have good classification performance. To facilitate the use of developed high throughput screening models, a tool named "TTR Profiler" is derived, which could be employed to determine whether a given substance is a potential CrmTTR, little skate-TTR, seabream-TTR, or human-TTR disruptor or not.

关键词： Endocrine disrupting effects Hormone transporter Endocrine disrupting chemicals Disinfection byproducts Classification model