13,580 research outputs found
Building and managing super calf hutches (Revised 1993)
No full text1 online resource (PDF, 5 pages)This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.Anderson, John F.; Bates, Donald W.. (1993). Building and managing super calf hutches (Revised 1993). Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/207266
Polarization dependence of the light coupling to surface plasmons in an Ag nanoparticle & Ag nanowire system
No full textPolarization dependence of the coupling of excitation light to surface plasmon polaritons (SPPs) was investigated in a Ag nanoparticle-nanowire waveguide system (a Ag nanoparticle attached to a Ag nanowire). It was found that under the illumination of excitation light on the nanoparticle-nanowire junction, the coupling efficiency of light to SPPs depends on the polarization of the excitation light. Theoretical simulations revealed that it is the local near-field coupling between the nanoparticle and the nanowire that enhances the incident light to excite the nanowire SPPs. Because the shapes of the Ag nanoparticles differ, the local field intensity, and thus the excitement of the nanowire SPPs, vary with the polarization of the excitation light.Physics, MultidisciplinarySCI(E)EI中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)[email protected]
Effects of shell thickness on the thermal stability of Cu-Ag core-shell nanoparticles: A molecular dynamics study
No full textCu-Ag core-shell (CS) nanoparticle (NP) is considered as a cost-effective alternative material to nano silver sintering material in die attachment application. To further reduce the cost, the thickness of the Ag shell can be adjusted. Whereas the shell thickness will also affect the thermal stability of the Cu-Ag CSNPs. In this study, molecular dynamics simulation was applied to study the thickness effect on the thermal behavior of Cu-Ag CSNPs. The melting points of CSNPs and Pure NPs can be determined by the evolutions of Potential Energy (PE), and the Lindemann index (LI) of the system. The results indicated that the melting points of CS NPs were lower than monometallic NP and the melting point of CS NP is influenced by the size of the Cu core and the number of lattice mismatches. Moreover, the distribution of atoms’ LI showed that the premelting point is independent of shell thickness. However, the fraction of atoms that occurred premelting is increased with the decrease of the shell thickness. Otherwise, we also simulated the sintering process of double CS NPs with equal size.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 Components, Technology and Material
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Synergistic Communities for Biochar
No full textAlbert Bates has been director of the Global Village Institute for Appropriate Technology since 1984 and of the Ecovillage Training Center at The Farm in Tennessee since 1994. His remarkable achievements include decades of support for indigenous people and the teaching of sustainable design, permaculture and technologies of the future to students from more than 50 nations, co-founding the Global Ecovillage Network and The Farm Ambulance Service, and inventing the concentrating arrays and solar-powered automobile displayed at the 1982 World's Fair. Bates is a former attorney who has argued environmental and civil rights cases before the US Supreme Court and has drafted a number of legislative acts. Bates is the author of Climate in Crisis (1990) and The Biochar Solution (2010) and the recipient of the first Right Livelihood Award (1980) and the Gaia Award (2012). Since the mid-1980s, Bates has been planting a private forest to sequester carbon dioxide and related greenhouse gas emissions from travel, business and personal activities. At 40 acres under mixed-age, mixed-species, climate-resilient management, primarily being managed for ecosystem services, that forest now annually plants itself as it expands.
Along with enjoying life with his family and friends, Jonathan Bates runs Food Forest Farm, a business specializing in permaculture education and sales of useful and edible plants. He’s been creating rural and urban gardens for over a decade, and is a co-designer and healthy inhabitant of the low-maintenance, resilient, abundantly diverse edible forest garden featured in the book Paradise Lot. This last year he designed and build his first bioshelter greenhouse that includes a temperate solar powered aquaponic system filtered with biochar. With an M.A. in Social Ecology, Jonathan thrives on working with others to better the world we live in. To find out more visit FoodForestFarm.com
Peter Hirst has been a natural resources and energy professional for 30 years, with 5 years of biochar management, production and training experience in his and Bob Wells’s company, New England Biochar, LLC. He works full time making and applying biochar, developing production equipment and practices, teaching and training in all phases of community scale biochar practice.Biochar & Permaculture: Albert Bates http://www.youtube.com/watch?v=afaKoWXsRiU Biochar & Aquaponics: Jonathan Bates http://www.youtube.com/watch?v=9c21drA2KS4 Jonathan will present his experience using biochar as a powerful growing medium in aquaponic systems. Aquaponics being the culturing of fish and plants together ecologically in closed systems (the merging of aquaculture and hydroponics). Biochar grow media benefits aquaponic systems in multiple ways, including its light weight, local sourcing, bio-chemical qualities, ecological nature, and affordable price. Through pictures and discussion he will show how his experiment has faired, and offer ideas for economic opportunities of aquaponic biochar in the Northeast. Biochar & the Klamath Hydro Settlement: Peter Hirst http://www.youtube.com/watch?v=zwOLDW-srGo The goal of the Klamath River Restoration Project is to reduce the massive influx of agricultural nutrients into Upper Klamath Lake and its resultant algae blooms, thereby reducing the extensive eutrophication of the Lower Klamath Lake and environs, and vastly improve water quality and ag nutrient management in the region, ultimately cleaning up the entire headwater system of the Klamath River, historically a critical habitat for important populations of endangered and threatened salmon and other fish species. This presentation discusses the many ways biochar is being proposed and considered – in restoration and treatment wetlands, in stream and onshore filtration, buffer zone and broadcast runoff control, nutrient recover and recycling and renewable energy replacement for dam removal – in this massive engineering project
Fig. 2 in Population And Reproductive Features Of Aphodius (Trichaphodius) Pisthius Bates And Cephalocyclus Hogei Bates (Coleoptera, Aphodiidae: Aphodiinae)
No full textFig. 2. Reproductive apparatus of A) female, and C) male Aphodius opisthius, and of B) female, and D) male Cephalocyclus hogei (from Martínez et al. 2001) (ae, aedeagus; ag, accessory glands; bo, basal oocyte; co, common oviduct; eb, ejaculatory bulb; gc, genital chamber; gr, glandular reservoir; lo, lateral oviduct; ov, ovary; sg, spermathecal gland; sp, spermatheca; t, testes; tf, testicular follicles; vd, vas deferens).Published as part of <i>Magdalena, Cruz R., Imelda, Martínez M. & Mayvi, Alvarado O., 2002, Population And Reproductive Features Of Aphodius (Trichaphodius) Pisthius Bates And Cephalocyclus Hogei Bates (Coleoptera, Aphodiidae: Aphodiinae), pp. 221-235 in The Coleopterists Bulletin 56 (2)</i> on page 226, DOI: 10.1649/0010-065X(2002)056[0221:PARFOA]2.0.CO;2, <a href="http://zenodo.org/record/10103116">http://zenodo.org/record/10103116</a>
Keeping dairy calves healthy (Revised 1987)
No full text1 online resource (PDF, 6 pages)This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.Johnson, Donald W.; Linn, James G.; Hanson, James O.; Reneau, Jeffrey; Bates, Donald W.. (1987). Keeping dairy calves healthy (Revised 1987). Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/207287
Voltammetric Detection of Urea on an Ag-Modified Zeolite- Expanded Graphite-Epoxy Composite Electrode
No full textIn this paper, a modified expanded graphite composite electrode based on natural zeolitic volcanic tuff modified with silver (EG-Ag-Z-Epoxy) was developed. Cyclic voltammetry measurements revealed a reasonably fast electron transfer and a good stability of the electrode in 0.1 M NaOH supporting electrolyte. This modified electrode exhibited moderate electrocatalytic effect towards urea oxidation, allowing its determination in aqueous solution. The linear dependence of the current versus urea concentration was reached using square-wave voltammetry in the concentrations range of urea between 0.2 to 1.4 mM, with a relatively low limit of detection of 0.05 mM. A moderate enhancement of electroanalytical sensitivity for the determination of urea at EG-Ag-Z-Epoxy electrode was reached by applying a chemical preconcentration step prior to voltammetric/amperometric quantification.ChemE/Chemical EngineeringApplied Science
Die identifisering van bates by 'n dogter met Downsindroom
No full textThesis (MEdPsych)--University of Stellenbosch, 2005.ENGLISH ABSTRACT: The study was undertaken to identify internal and external assets of a ten year- old
girl with Down Syndrome. The assets include those of the individual and the broader
community. The learner’s assets, in her immediate environment, was difficult to
identify because of minimal exposure to community activities. A list of assets were
compiled and the 40 Developmental Assets as researched by the “Searched Institute
of Minneapolis” (Roehlkepartain & Leffert, 2000), served as key elements for the
cartographic listing of the assets of the learner with Down Syndrome. In this
research, the asset-based approach was used as a framework. A qualitative
research design was used for the research where the learner was observed in her
natural environment. The learner was observed at school and at home with the aim
to identify assets.
During the research the parents as well as the school was empowered by shifting
their focus from the learner’s needs and shortcomings to the learner’s strengths,
abilities and talents. The identifying of the new assets will enable the learner to
improve her socialising skills and allow her to improve her self-care.
The results of the research show that the parents and the school developed a more
positive attitude with regard to the identification and mobilization of assets of
learners with disabilities.AFRIKAANSE OPSOMMING: Die studie is onderneem om interne en eksterne bates by 'n leerder met
Downsindroom te identifiseer. Die bates sluit nie net diè van die individu in nie, maar
neem ook die bates wat in die breër gemeenskap bestaan, in ag. Die leerder se
eksterne bates in haar onmiddellike omgewing was moeilik identifiseerbaar, omdat
sy weinig blootgestel word aan gemeenskapsaktiwiteite. 'n Lys van bates is
saamgestel en die 40 Ontwikkelingsbates soos deur die "Search Institute of
Minneapolis" (Roehlkepartain & Leffert, 2000) nagevors, is as sleutelelemente
gebruik vir die kartografering van die bates vir die leerder met Downsindroom. In
hierdie navorsing is die bate-gebaseerde benadering as 'n raamwerk gebruik. 'n
Kwalitatiewe navorsingsontwerp is vir hierdie navorsing gebruik waar die leerder in
haar natuurlike omgewing waargeneem is. Die leerder is by die skool en by die huis
waargeneem met die doel om bates te identifiseer. Tydens die navorsing is die ouers
en die skool bemagtig deur hul fokus te verskuif vanaf die leerder se behoeftes en
tekorte na die leerder se sterkpunte, vermoëns en talente. Die identifisering van die
nuwe bates by die leerder sal haar sosialiseringsvaardighede verbeter en haar in
staat stel om veral haar selfversorging te verbeter.
Die resultate van die navorsing dui daarop dat die ouers en die skool 'n meer
positiewe houding ontwikkel het ten opsigte van die identifisering en mobilisering van
bates by leerders met gestremdhede
Ore mineralogy and trace element (re)distribution at the metamorphosed Lappberget Zn-Pb-Ag-(Cu-Au) deposit, Garpenberg, Sweden
No full textQualitative and quantitative mineralogical and textural investigations were undertaken for the different sulfide minerals in the 1.89 Ga Lappberget deposit, with a focus on sphalerite and pyrite. Three sphalerite types were identified and associated with: (1) main massive sulfide mineralization, (2) Fe-Mn skarn ore, and (3) Ag-rich fissure veins. Sphalerite-1 contained a relatively higher amount of trace elements (Fe, Co, Ge, Cu, Sn, and Au) but is lower in Mn/Fe, Ga, and Hg compared to sphalerite-2. Evidence of tectono-metamorphic modification of sulfides is observed throughout the deposit, such as the formation of growth twins and deformation twins in sulfides, the development of high-angled triple-point junctions in recrystallized pyrite and sphalerite, and the formation of â??ball oreâ?? or â??durchbewegungâ?? textures within mineralized shear zones. The recrystallization of pyrite and galena may have led to the re-distribution of fluid-mobile elements (As, Cu, Zn, Pb, Ag, and Au), some of which were deposited in discordant Ag-rich fissure veins peripheral to the main massive sulfide lenses. Trace element signatures of sulfides in Lappberget are compatible with the other metamorphosed and deformed, subseafloor volcanogenic carbonate replacement (SVALS)-type deposits in the Bergslagen mining district. © 2021 The Author(s)</p
Ore mineralogy and trace element (re)distribution at the metamorphosed Lappberget Zn-Pb-Ag-(Cu-Au) deposit, Garpenberg, Sweden
No full textQualitative and quantitative mineralogical and textural investigations were undertaken for the different sulfide minerals in the 1.89 Ga Lappberget deposit, with a focus on sphalerite and pyrite. Three sphalerite types were identified and associated with: (1) main massive sulfide mineralization, (2) Fe-Mn skarn ore, and (3) Ag-rich fissure veins. Sphalerite-1 contained a relatively higher amount of trace elements (Fe, Co, Ge, Cu, Sn, and Au) but is lower in Mn/Fe, Ga, and Hg compared to sphalerite-2. Evidence of tectono-metamorphic modification of sulfides is observed throughout the deposit, such as the formation of growth twins and deformation twins in sulfides, the development of high-angled triple-point junctions in recrystallized pyrite and sphalerite, and the formation of â??ball oreâ?? or â??durchbewegungâ?? textures within mineralized shear zones. The recrystallization of pyrite and galena may have led to the re-distribution of fluid-mobile elements (As, Cu, Zn, Pb, Ag, and Au), some of which were deposited in discordant Ag-rich fissure veins peripheral to the main massive sulfide lenses. Trace element signatures of sulfides in Lappberget are compatible with the other metamorphosed and deformed, subseafloor volcanogenic carbonate replacement (SVALS)-type deposits in the Bergslagen mining district. © 2021 The Author(s)</p
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