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Academic literature on the topic 'Specimen ballots'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 July 2025

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Journal articles on the topic "Specimen ballots"

1

Koohmishi, Mehdi, and Alireza Azarhoosh. "Degradation of crumb rubber modified railway ballast under impact loading considering aggregate gradation and rubber size." Canadian Geotechnical Journal 58, no. 3 (2021): 398–410. http://dx.doi.org/10.1139/cgj-2019-0596.

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Impact loads generated from the dynamic effect of passing trains can exacerbate the degradation level of ballast aggregate of railway track. To diminish the induced impact loads, the use of crumb rubber (CR) in the ballast course is characterized as a well-established procedure related to the modification of utilized material. Nonetheless, more in-depth assessments of size and percentage of CR particles combined with ballast aggregate are still required. The present study evaluates the influence of size and content of CR particles used for degradation reduction of ballast aggregate subjected t

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Indraratna, Buddhima, Mandeep Singh, Thanh Trung Nguyen, et al. "Laboratory study on subgrade fluidization under undrained cyclic triaxial loading." Canadian Geotechnical Journal 57, no. 11 (2020): 1767–79. http://dx.doi.org/10.1139/cgj-2019-0350.

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A long-term issue that has hampered the efficient operation of heavy-haul tracks is the migration of fluidized fines from the shallow soft subgrade to the overlying ballast, i.e., mud pumping. This paper presents a series of undrained cyclic triaxial tests where realistic cyclic loading conditions were simulated at low confining pressure that is typical of shallow subgrade beneath a ballast track. Subgrade soil specimens with a low-plasticity index collected from a field site with recent history of mud pumping were tested at frequencies from 1.0 to 5.0 Hz and a cyclic stress ratio (CSR) from 0

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Syafina, Ikfana. "Evaluasi sensitivitas dan spesifisitas Xpert MTB RIF dan Xpert MTB RIF Ultra pada berbagai spesimen untuk mendiagnosis tuberkulosis ekstra paru: Sebuah telaah literatur sistematis." Holistik Jurnal Kesehatan 18, no. 3 (2024): 335–49. http://dx.doi.org/10.33024/hjk.v18i3.166.

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Background: Molecular examination using Xpert MTB RIF and Xpert MTB RIF Ultra was introduced by WHO in 2010 as a fast and practical supporting examination in detecting Mycobacterium tuberculosis. However, not many studies have reported how sensitive and specific this method is in the examination of various specimens in establishing the diagnosis of extrapulmonary tuberculosis. Purpose: To evaluate the sensitivity and specificity of Xpert MTB RIF and Xpert MTB RIF Ultra on various specimens to establish the diagnosis of extrapulmonary tuberculosis. Method: Systematic literature review by search

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Zhao, Jian-bin, Jie Li, Xiao-hong Bai, Chen-xi Miao, and Jun Zhang. "Influence of Particle Orientation on the Performance of Geogrid Reinforced Ballast." Advances in Materials Science and Engineering 2020 (December 27, 2020): 1–12. http://dx.doi.org/10.1155/2020/6758059.

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To explore the initial orientation effect of ballast assembly on the reinforcement performance of the geogrid reinforced ballast, particles with random orientation and five prescribed rotational orientations were developed through particle flow code (PFC3D). The evolution laws of the pullout force and the principal directions of the normal contact force were systematically compared and analyzed. Furthermore, the mechanical responses such as pullout force, distribution of axial force, displacement vectors, force chain, and mesoscopic fabric were discussed. According to the displacement vectors

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Citoglu, G. S., B. S. Yilmaz, B. Tarikahya, and R. Tipirdamaz. "Chemotaxonomy of Ballota Species." Chemistry of Natural Compounds 41, no. 3 (2005): 299–302. http://dx.doi.org/10.1007/s10600-005-0134-7.

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Wan, Zabidii Wan Morni, Yu Abit Lirong, Latif Kamil, Nerurkar Sayali, Hassan Ruhana, and Abdulla-Al-Asif. "First record of saucer scallop Ylistrum balloti (Bernardi, 1861) from equatorial South China Sea." Arxius de Miscellania Zoologica 20, no. 2022 (2023): 103–10. https://doi.org/10.32800/amz.2022.20.0103.

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<em>Ylistrum balloti</em> is one of the Pectinidae species distributed within the Indo-Pacific region. Recently, 15 live specimens of <em>Y. balloti</em> were recorded from the continental shelf of Sarawak, Malaysia. The main morphological characteristics were displayed on the outer valve, these being a brown-red colour and a clear concentric pattern of thin brown lines. The prominent internal ribbing numbers on both valves also helped species identification. The preliminary report of <em>Y. balloti</em> revealed that the species is present in Sarawak waters and can be furt

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Setiawan, DM, NCR Nastiti, and SAP Rosyidi. "The Effect of Bitumen and Scrap Tire on the Deformation of the Ballast Layer." Journal of Physics: Conference Series 2989, no. 1 (2025): 012034. https://doi.org/10.1088/1742-6596/2989/1/012034.

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Abstract The ballast layer is part of the conventional railway track structure widely used in Indonesia due to its ease of maintenance, construction simplicity, and lower costs compared to slab track technology. This study models four types of test specimens, including the use of scrap tire rubber and bitumen materials. The scrap tire rubber and bitumen were added at proportions of 10% and 3%, respectively, using a compression test method to measure deformation, abrasion, and elastic modulus. The results showed that ballast modified with scrap tire rubber had the lowest stiffness value compare

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Setiawan, Dian M. "Utilization of 60/70 penetration grade asphalt on ballast structures with the variation of percentage and the number of pouring layers." Journal of the Mechanical Behavior of Materials 28, no. 1 (2019): 107–18. http://dx.doi.org/10.1515/jmbm-2019-0013.

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AbstractRailroad ballast structure layer may experience a decline in mechanical and geometrical performance due to heavy train and environmental loads. In order to improve the quality of ballast structure, the addition of asphalt to ballast layer can be considered as a solution. Therefore, this research utilizes 60/70 penetration grade asphalt for ballast layer binding and stabilization. The objective of this study was to evaluate and analyze the mechanical behavior of clean-ballast and fouled-ballast layers with 2% and 4% penetration grade 60/70 asphalt poured in one (ballast surface layer) a

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Ariyanto, Bobby, and Dian Setiawan M. "Dampak Penambahan Campuran Aspal Penetrasi 60/70 Sebanyak 3% pada 1 Lapisan dan 3 Lapisan Struktur Balas." Bulletin of Civil Engineering 2, no. 1 (2022): 7–16. http://dx.doi.org/10.18196/bce.v2i1.12410.

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The addition of asphalt material is expected to increase service life and minimize maintenance costs from conventional ballast structures. The purpose of this study was to determine the weight of test material + asphalt 3%, compressive strength, vertical deformation, elastic modulus, abrasion value and damage to the test specimen after loading. The method used was the compressive test method while for the test object used consists of dirty ballast, clean ballast, dirty ballast + 3% asph alt 1 layer, dirty ballast + 3% asphalt 3 layers, clean ballast + 3% asphalt 1 layer, clean ballast + 3% asp

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Christenhusz, Maarten J. M., Michael F. Fay, and Ilia J. Leitch. "The genome sequence of black horehound, Ballota nigra L. subsp. foetida (Lam.) Hayek (Lamiaceae)." Wellcome Open Research 8 (October 12, 2023): 439. http://dx.doi.org/10.12688/wellcomeopenres.19763.1.

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We present a genome assembly from a specimen of Ballota nigra (black horehound; Tracheophyta; Magnoliopsida; Lamiales; Lamiaceae). The genome sequence is 1186.8 megabases in span. Most of the assembly is scaffolded into 11 chromosomal pseudomolecules. Three mitochondrial chromosomes were assembled, with lengths of 148,17, 121,67 and 125,74 kilobases. The chloroplast genome has been assembled and is 151.91 kilobases in length.

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Dissertations / Theses on the topic "Specimen ballots"

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Tavares, Joana Flor R. "Assessing the importance of biological uncertainties to the control of species introductions via ballast water /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 90 p, 2009. http://proquest.umi.com/pqdweb?did=1654487631&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Gildenhuys, Enelge. "Unravelling taxonomic uncertainties among balloon vine species within the genus Cardiospermum using a molecular approach." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85719.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Alien invasive species are a global concern not only threating biodiversity, but also negatively impacting regional economies. Consequently research aimed at understanding the invasion process is crucial for management of invasive alien species to reduce these impacts. Identifying accurate natal ranges is the key first step for efficient alien plant management, especially biological control. Such knowledge may assist in selecting host-specific biological control agents and help prevent non-target impact on native speci

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Kvistad, Jake T. "Modeling Ballast Water Management Strategies for Slowing the Secondary Spread of Aquatic Invasive Species on the Laurentian Great Lakes." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1533328303491667.

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Sheldon, Todd August. "Control Method for Invasive Aquatic Species introduced via Ballast Water: Effects of Carbon Dioxide Supersaturation on Survivorship of Digesia tigrina (Planaria: Maculata) and Lirceus brachyurus (Isopoda: Crustacea) and Effect of High Hydrostatic Pressure Processing on Freely Suspended and Shellfish Associated T7 Bacteriophage." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/41294.

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Control Method for Invasive Aquatic Species introduced via Ballast Water: Effects of Carbon Dioxide Supersaturation on Survivorship of Digesia tigrina (Planaria: Maculata) and Lirceus brachyurus (Isopoda: Crustacea) Survivorship of an aquatic species of planaria (Digesia tigrina) and isopods (Lirceus barchyurus) to elevated levels of carbon dioxide (CO2) was determined. Both planaria and isopods were exposed to levels of freshwater supersaturated with carbon dioxide, and percent mortality was calculated for various exposure durations, and at various pressure levels. The data collected were

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Fartouna-Bellakhal, Mouna. "Distribution spatiale des kystes de résistance des Dinoflagellés au niveau du sédiment superficiel de la lagune de Bizerte : cas de l’espèce invasive Alexandrium pacificum R.W. Litaker, 2014." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2081/document.

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Les rejets des eaux de ballast dans le port de Bizerte et les fermes conchylicoles installées au niveau de la lagune de Bizerte peuvent constituer des sources potentielles ayant un impact sur l’introduction des espèces de Dinoflagellés nuisibles, en particulier celles qui sont potentiellement toxiques telles que A. pacificum, A.pseudogonyaulax, A.minutum, A. affine et Polysphaeridium zoharyi, sans pour autant négliger le rôle des courants dans la distribution des kystes. L’étude du trafic maritime sur les 7 années précédant notre prospection a révélé que 14 % de la flotte qui accoste au port d

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Sieracki, Jennifer L. "Spatial Modeling as a Decision-making Tool for Invasive Species Management in the Great Lakes." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1408630726.

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Teullet, Marie. "Les espèces exotiques envahissantes et le droit de la mer : essai de qualification." Thesis, Paris 2, 2014. http://www.theses.fr/2014PA020038.

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Les espèces exotiques envahissantes sont un sujet de préoccupation grandissant, mais sont-elles,pour le droit international, un objet comme un autre ? Une espèce exotique envahissante a comme particularité d’être une espèce vivante qui, par sa seule présence dans un écosystème qui lui est étranger, va engendrer des effets délétères alors qu’elle n’en aurait causé aucun dans son écosystème d’origine. Le droit de la mer est-il armé pour répondre à cette menace ? La question de la qualification de leur atteinte en droit international et plus précisément en droit de la mer est autant novatrice que

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Pereira, Newton Narciso. "Alternativas de tratamento da água de lastro em portos exportadores de minério de ferro." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-07062012-174800/.

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Esta tese visa avaliar técnica e economicamente o tratamento da água de lastro em portos exportadores de minério de ferro do Brasil. Para isso foram estudadas três alternativas de tratamento distintas: (1) estação de tratamento fixa no porto em terra; (2) estação de recepção da água de lastro junto com estação de dessalinização fixa no porto; (3) tratamento a bordo de embarcações aliviadoras dedicadas para operar na barra, ou seja, na área de espera dos navios para atracar no porto. O interesse de estudar estas alternativas para portos de minério de ferro deve-se ao elevado volume de água de l

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Krysztofiak, Gisèle. "Transport et chimie d'espèces soufrées et bromées dans la haute troposphère et basse stratosphère diagnostiqués par des mesures sous ballon et en avion et par modélisation." Phd thesis, Université d'Orléans, 2013. http://tel.archives-ouvertes.fr/tel-01004398.

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Le phénomène de destruction de l'ozone est un sujet vaste mettant en scène de nombreux processus. Il a pour origine l'émission de composés dits gaz sources (SGs) dans la troposphère. Récemment, les espèces à très courte durée de vie (VSLS) ont été identifiées comme SGs possibles. Cependant, elles ne possèdent pas un temps de vie suffisamment long pour atteindre directement la stratosphère. Les VSLS se dégradent au cours de leur transport, conduisant à des composés intermédiaires, les gaz produits (PGs). Les SGs et les PGs des VSLS vont entrer dans la stratosphère au niveau des régions équatori

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Castro, Maria Cecilia Trindade de. "O Porto do Rio de Janeiro sob o enfoque da água de lastro." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=855.

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A introdução de espécies exóticas nos ecossistemas marinhos, estuarinos e de água doce já é realidade em muitos locais do globo. Apesar de existirem diferentes mecanismos de dispersão de espécies exóticas, que variam tanto espacialmente quanto temporalmente, o movimento global da água de lastro é o vetor de transferência mais importante na atualidade. A proposta deste estudo é a caracterização do Porto do Rio de Janeiro sob o aspecto da água de lastro a partir de dois instrumentos: o Formulário para informações a respeito da água utilizada como lastro e a planilha Ballast Water Estimates From

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Books on the topic "Specimen ballots"

1

B, Andrew Carol, ed. My beautiful ballets. Learning Wood, 2006.

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ill, Holmes Sally, and Wood Jenny, eds. Sleeping beauty. Andrews and McMeel, 1995.

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ill, Holmes Sally, and Wood Jenny, eds. The nutcracker. Andrews and McMeel, 1995.

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Inkpen, Mick. The blue balloon. Hodder and Stoughton, 1993.

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Inkpen, Mick. The blue balloon. Hodder and Stoughton, 1989.

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Inkpen, Mick. The blue balloon. Hodder Children's Books, 1991.

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National Research Council (U.S.). Committee on the St. Lawrence Seaway:Options to Eliminate Introduction of Nonindigenous Species into the Great Lakes, Phase 2. Great Lakes shipping, trade, and aquatic invasive species. Transportation Research Board, 2008.

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Artists, Disney Storybook, ed. The great balloon chase. Publications International, Ltd., 2008.

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ill, Mahan Ben, ed. Bear's big balloon: A counting book. Grosset & Dunlap, 1986.

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National Research Council (U.S.). Committee on Ships' Ballast Operations., ed. Stemming the tide: Controlling introductions of nonindigenous species by ships' ballast water. National Academy Press, 1996.

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Book chapters on the topic "Specimen ballots"

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Hamer, John P. "Ballast Tank Sediments." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_24.

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Gollasch, Stephan, Elspeth Macdonald, Sara Belson, et al. "Life in Ballast Tanks." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_23.

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Abendroth, Martin, Shahin Takht Firouzeh, Meinhard Kuna, and Bjoern Kiefer. "Determination of the Temperature-Dependent Fracture and Damage Properties of Ceramic Filter Materials from Small Scale Specimens." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_23.

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AbstractOpen cell ceramic foam filters are used to improve the quality of metallic cast products. They play a major role on reducing the number of inclusions within the microstructure of the cast product and restraining the liquid flow inside the mold. The newly developed carbon-bonded alumina ceramics are investigated considering the mechanical and thermal loads of the filtration process. The aim of this project is to assess the strength, the fracture mechanical behavior, and the damage properties of the filter material. Since the tiny struts of the foam have different properties than the com

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Souissi, Sami, Olivier Glippa, and Hans-Uwe Dahms. "Global Shipping, ballast water and invasive Species." In Marine Pollution and Climate Change. CRC Press, 2017. http://dx.doi.org/10.1201/9781315119243-7.

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Cangelosi, Allegra. "Filtration as a Ballast Water Treatment Measure." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_50.

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Taylor, Alan, Geoff Rigby, Stephan Gollasch, et al. "Preventive Treatment and Control Techniques for Ballast Water." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_48.

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Holbech, Henrik, and Knud Ladegaard Pedersen. "Ballast Water and Invasive Species in the Arctic." In Arctic Marine Resource Governance and Development. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-67365-3_7.

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Hülsmann, Norbert, and Bella S. Galil. "Protists — A Dominant Component of the Ballast-Transported Biota." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_3.

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Haugom, Gerd P., Hanna L. Behrens, and Aage B. Andersen. "Risk Based Methodology to Assess Invasive Aquatic Species in Ballast Water." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_46.

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Galil, Bella S., and Norbert Hülsmann. "The Biological Efficacy of Open Ocean Exchange — Implications for Ballast Water Management." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management. Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_49.

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Conference papers on the topic "Specimen ballots"

1

Lee, Chul-Hwan, Ki-Hoon Han, Eun-Ha Song, and Sung-Goun Lee. "The Effect of Chlorinated Seawater on Coating Performance of Epoxy for a Ship’s Water Ballast Tank." In CORROSION 2013. NACE International, 2013. https://doi.org/10.5006/c2013-02279.

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Abstract Many kinds of organic coatings have been applied to protect ships in various corrosive environments. Mainly epoxy coating systems have been used to protect water ballast tanks of ships from corrosion. Since aquatic nuisance species via a ship’s ballast water have induced detrimental ecological issues, numerous water ballast treatment systems designed to block inflow of aquatic species are presently being studied. However, by using these treatment technologies, there have been concerns that they may have some adverse effects on the performance of coating systems for ships’ ballast tank

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Jung, Geunsu, Byoung Young Yoon, Jae Kwang Lee, and Chae-Seon Lim. "Effect of Chlorination on Corrosion of 90-10 Cu-Ni Alloy for Ballast Water System." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-11418.

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Abstract Cu-based alloys are frequently used for seawater pipings because of their resistance to chloride pitting as well as anti-fouling characteristics. One of the variations of Cu based alloys, 90-10 Cu-Ni alloy, which is 10 mass % of Ni alloyed to Cu, is often a very attractive choice for seawater applications such as ballast water systems for its reliable performance in seawater at lower cost. Seawater intake to ballast water tanks is normally treated with disinfectants, such as chlorine, by ballast water treatment systems (BWTS) to kill invasive species in ballast water. These invasive s

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Al-Borno, Amal, Henry Pedraza, Ezz Ahmed, and Moavin Islam. "Effect of Filming Biocides on the Performance of Zn Sacrificial Anodes Used in Seawater Ballast Tanks." In CONFERENCE 2025. AMPP, 2025. https://doi.org/10.5006/c2025-00372.

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Abstract Ballast tanks are an integral part of marine vessels such as oil tankers, cargo ships, cruise ships, and pressure vessels as well as offshore oil and gas production platforms. Constructed from carbon steel, these tanks ensure stability and buoyancy by filling or emptying with seawater. To protect against corrosion, ballast tanks are internally coated, and sacrificial zinc (Zn) anode cathodic protection (CP) systems are commonly employed to address any coating defects. Additionally, biocides are introduced to mitigate the potential proliferation of harmful aquatic organisms and bacteri

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Mills, George, and Johnny Eliasson. "Factors Influencing Early Crack Development in Marine Cargo and Ballast Tank Coatings." In Paint and Coatings Expo (PACE) 2006. SSPC, 2006. https://doi.org/10.5006/s2006-00049.

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Abstract Stress development in epoxy coatings applied in water ballast tanks (WBT) on ships can lead to cracking, corrosion, and failure of ship's hulls, with catastrophic consequences to the environment as well as loss of seamen at sea. Typically these cracks do not appear during application and curing of the coating but after some finite time of service. The financial well being of the ship’s owner can suffer greatly. To avoid such cracking it is critical to have a clear understanding of the underlying mechanisms and primary controlling factors behind the coating cracks. In this paper we rev

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Mishra, Debakanta, and S. M. Naziur Mahmud. "Effect of Particle Size and Shape Characteristics on Ballast Shear Strength: A Numerical Study Using the Direct Shear Test." In 2017 Joint Rail Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/jrc2017-2322.

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The ballast layer serves as a major structural component in typical ballasted railroad track systems. When subjected to an external load, ballast particles present a complex mechanical response which is strongly dependent on particle to particle interactions within this discrete medium. One common test used to study the shear strength characteristics of railroad ballast is the Direct Shear Test (DST). However, it is often not feasible in standard geotechnical engineering laboratories to conduct direct shear tests on ballast particles due to significantly large specimen and test setup requireme

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Qian, Yu, Erol Tutumluer, Youssef M. A. Hashash, and Jamshid Ghaboussi. "Effects of Ballast Degradation on Permanent Deformation Behavior From Large-Scale Triaxial Tests." In 2014 Joint Rail Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/jrc2014-3806.

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Consisting of large sized aggregate particles with uniform size distribution, ballast is an essential component of the track substructure to facilitate load distribution and drainage. As freight tonnage accumulates with traffic, ballast will get fouled increasingly due to either aggregate breakdown and degradation or contamination by other materials such as coal dust and subgrade soil intrusion. Fouling affects shear strength and load carrying ability of ballast layer especially under wet conditions. According to Selig and Waters [1], ballast fouling is often due to aggregate degradation, whic

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Choi, Sung R., Zsolt Racz, Ramakrishna T. Bhatt, David N. Brewer, and John P. Gyekenyesi. "Effect of Projectile Materials on Foreign Object Damage of a Gas-Turbine Grade Silicon Nitride." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68866.

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Foreign object damage (FOD) behavior of AS800 silicon nitride was determined using four different projectile materials at ambient temperature. The target test specimens rigidly supported were impacted at their centers by spherical projectiles with a diameter of 1.59 mm. Four different types of projectiles were used including hardened steel balls, annealed steel balls, silicon nitride balls, and brass balls. Post-impact strength of each target specimen impacted was determined as a function of impact velocity to better understand the severity of local impact damage. The critical impact velocity

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Stark, Timothy D., Robert H. Swan, and Zehong Yuan. "Ballast Direct Shear Testing." In 2014 Joint Rail Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/jrc2014-3714.

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This paper summarizes the appropriate equipment and test procedure for ballast shear strength testing using the direct shear method (ASTM D3080 and D5321) and presents some typical results. To accomplish this ballast testing, a full-scale direct shear box was developed that can accommodate an approximately 1 m (3 feet) wide and 0.6 m (2 feet) deep specimen, which is much larger than current shear boxes used for ballast testing. This larger specimen size resulted in significant differences in measured shear behavior and shear strength parameters. The shear strength properties of the ballast und

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Mahmud, S. M. Naziur, Debakanta Mishra, and David O. Potyondy. "Effect of Geogrid Inclusion on Ballast Resilient Modulus: The Concept of ‘Geogrid Gain Factor’." In 2018 Joint Rail Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/jrc2018-6126.

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Geogrid reinforcement of railroad ballast improves its structural response under loading, limits lateral movement of ballast particles, and reduces vertical settlement through effective geogrid-ballast interlocking. This improved performance can be linked to improved shear strength and resilient modulus properties. An ongoing research study at Boise State University is focusing on investigating the effects of different specimen and test parameters on the mechanism of geogrid-ballast interaction. A commercially available Discrete Element Modeling (DEM) program (PFC3D®) is being used for this pu

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Chance, K. V., F. J. Lin, and W. A. Traub. "Far-Infrared Measurements of Stratospheric Trace Species." In Optical Remote Sensing. Optica Publishing Group, 1985. http://dx.doi.org/10.1364/ors.1985.tuc7.

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This paper presents the current state of results from our program of balloon-borne far-infrared spectroscopy of the stratosphere. The instrumentation used in these observations consists of a two-beam Fourier transform spectrometer, which receives thermal emission radiation from the atmosphere by means of a telescope that is accelerometer- and gyroscope-stabilized to 0.02° in absolute elevation. The spectrometer is operated over the range 80-220 cm-1, with an unapodized resolution of 0.032 cm-1. The field of view on the sky is 0.3°, corresponding to a sampling width of less than 1/3 atmospheric

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Reports on the topic "Specimen ballots"

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Kessenich, Brennan, Irina Irvine, and Christine Lipsky. An overview of ballast water transport and treatment of aquatic invasive species. National Park Service, 2022. http://dx.doi.org/10.36967/2294665.

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Slijkerman, D. M. E., S. T. Glorius, A. Gittenberger, et al. Monitoring Groningen Sea Ports : non-indigenous species and risks from ballast water in Eemshaven and Delfzijl. Wageningen Marine Research, 2017. http://dx.doi.org/10.18174/417717.

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Commercial Vessel Ballast Water Management (2021-2022): Report to Congress June 3, 2024. U.S. Department of Homeland Security; U.S. Coast Guard, 2024. http://dx.doi.org/10.5479/10088/119844.

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The 2018 Vessel Incidental Discharge Act (VIDA)1 requires an annual report on the effectiveness of national ballast water management (BWM) requirements. This report provides analyses of (1) the patterns of ballast water (BW) delivery and management; (2) Coast Guard’s compliance and enforcement actions regarding BWM regulations; and (3) patterns of biological invasions by marine and estuarine aquatic nuisance species (ANS). It covers the two-year period from January 2021 through December 2022 to demonstrate the effectiveness of the Coast Guard’s statutorily mandated BWM regulatory program and v

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