Gotowe bibliografie tematyczne / Bore water

Gotowa bibliografia na temat „Bore water”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 20 lutego 2023

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Artykuły w czasopismach na temat "Bore water"

1

Lu, Senxun, Haijiang Liu i Xiaohu Deng. "An Experimental Study of the Run-Up Process of Breaking Bores Generated by Dam-Break Under Dry- and Wet-Bed Conditions". Journal of Earthquake and Tsunami 12, nr 02 (czerwiec 2018): 1840005. http://dx.doi.org/10.1142/s1793431118400055.

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In this study, a series of dam-break laboratory experiments were carried out to investigate the run-up process of breaking bores under dry- and wet-bed conditions. Detailed measurements were conducted to reveal differences in the run-up hydrodynamic characteristics under these two conditions, e.g. the bore front profile, the maximum run-up height and duration, and the instantaneous bore front velocity. Two successive bores were observed under the wet-bed run-up process, while multiple bores (three bores in general) were generated during the dry-bed run-up process due to the significant bottom friction effect. A linear relationship with the uniform gradient is found between the maximum run-up height and the initial water head for both dry- and wet-bed conditions, indicating that difference in the maximum run-up height between the dry- and specified wet-bed cases or among various wet-bed cases is not sensitive to the initial water head. Under the same initial water head, although the dry-bed run-up process takes a longer duration than that of wet-bed cases, the maximum run-up height is smallest for the dry-bed case and gradually increases with the increase of the initial downstream water depth for wet-bed cases. Under the wet-bed conditions, temporal variation of the bore front run-up velocity can be classified into two stages, i.e. the acceleration stage induced by the relatively large incident bore front water depth (large onshore hydrostatic pressure gradient) and the deceleration stage governed by the offshore-directed gravity force and bottom friction. Nevertheless, due to the small incident bore front water depth, run-up process under the dry-bed conditions does not show the acceleration stage.
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2

Draper, A. D. K., M. Mayo, G. Harrington, D. Karp, D. Yinfoo, L. Ward, A. Haslem, B. J. Currie i M. Kaestli. "Association of the Melioidosis Agent Burkholderia pseudomallei with Water Parameters in Rural Water Supplies in Northern Australia". Applied and Environmental Microbiology 76, nr 15 (11.06.2010): 5305–7. http://dx.doi.org/10.1128/aem.00287-10.

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ABSTRACT We analyzed water parameters and the occurrence of the melioidosis agent Burkholderia pseudomallei in 47 water bores in Northern Australia. B. pseudomallei was associated with soft, acidic bore water of low salinity but high iron levels. This finding aids in identifying water supplies at risk of contamination with this pathogenic bacterium.
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Wael Sulayman Miftah Ammar i Ying Shi. "The application of the KdV type equation in engineering simulation". Maejo International Journal of Energy and Environmental Communication 3, nr 2 (4.06.2021): 7–10. http://dx.doi.org/10.54279/mijeec.v3i2.245174.

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Bores propagating in shallow water transform into undular bores and, finally, into trains of solitons. The observed number and height of these undulations and later discrete solitons are strongly dependent on the propagation length of the bore. Empirical results show that the final height of the leading soliton in the far-field is twice the initial mean bore height. The complete disintegration of the initial bore into a train of solitons requires very long propagation, but unfortunately, these required distances are usually not available in experimental tests of nature. Therefore, the analysis of the bore decomposition for experimental data into solitons is complicated and requires different approaches. Previous studies have shown that by applying the nonlinear Fourier transform based on the Ko- rteweg–de Vries equation (KdV-NFT) to bores and long-period waves propagating in constant depth, the number and height of all solitons can be reliably predicted already based on the initial bore-shaped free surface. Against this background, this study presents the systematic analysis of the leading-soliton amplitudes for non-breaking and breaking bores with different strengths in different water depths to validate the KdV-NFT results for non-breaking bores to show the limitations of wave breaking on the spectral results. The analytical results are compared with data from experimental tests, numerical simulations and other approaches from the literature.
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4

Bernard, D., i H. Maillot. "Présence dans la ressource en eau potable d'éléments présentant des risques sanitaires : nickel, bore, plomb, pesticides". Journal européen d’hydrologie 31, nr 1 (2000): 11–24. http://dx.doi.org/10.1051/water/20003101011.

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McSweeney, Jacqueline M., James A. Lerczak, John A. Barth, Johannes Becherer, Jennifer A. MacKinnon, Amy F. Waterhouse, John A. Colosi i in. "Alongshore Variability of Shoaling Internal Bores on the Inner Shelf". Journal of Physical Oceanography 50, nr 10 (1.10.2020): 2965–81. http://dx.doi.org/10.1175/jpo-d-20-0090.1.

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AbstractTemperature and velocity measurements from 42 moorings were used to investigate the alongshore variability of nonlinear internal bores as they propagated across the central California inner shelf. Moorings were deployed September–October 2017 offshore of the Point Sal headland. Regional coverage was ~30 km alongshore and ~15 km across shore, spanning 9–100-m water depths. In addition to subtidal processes modulating regional stratification, internal bores generated complex spatiotemporal patterns of stratification variability. Internal bores were alongshore continuous on the order of tens of kilometers at the 50-m isobath, but the length scales of frontal continuity decreased to O(1 km) at the 25-m isobath. The depth-averaged, bandpass-filtered (from 3 min to 16 h) internal bore kinetic energy was found to be nonuniform along a bore front, even in the case of an alongshore-continuous bore. The pattern of along-bore variability varied for each bore, but a 2-week average indicated that was generally strongest around Point Sal. The stratification ahead of a bore influenced both the bore’s amplitude and cross-shore evolution. The data suggest that alongshore stratification gradients can cause a bore to evolve differently at various alongshore locations. Three potential bore fates were observed: 1) bores transiting intact to the 9-m isobath, 2) bores being overrun by faster, subsequent bores, leading to bore-merging events, and 3) bores disappearing when the upstream pycnocline was near or below middepth. Maps of hourly stratification at each mooring and the estimated position of sequential bores demonstrated that an individual internal bore can significantly impact the waveguide of the subsequent bore.
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6

Yeh, Harry H., Abdulhamid Ghazali i Ingunn Marton. "Experimental study of bore run-up". Journal of Fluid Mechanics 206 (wrzesień 1989): 563–78. http://dx.doi.org/10.1017/s0022112089002417.

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Bore propagation near the shoreline, the transition from bore to wave run-up, and the ensuing run-up motion on a uniformly sloping beach are investigated experimentally. As a bore approaches the shoreline, the propagation speed first decelerates by compressing its wave form and then suddenly accelerates at the shoreline. Although this behaviour is qualitatively in agreement with the inviscid shallow-water wave prediction (often called the ‘bore collapse’ phenomenon), unlike the genuine bore-collapse phenomenon, the acceleration is caused by the ‘momentum exchange’ process, i.e. collision of the bore against the initially quiescent water along the shoreline. Owing to this momentum exchange, a single bore motion degenerates into two successive run-up water masses; one involves a turbulent run-up water motion followed by the original incident wave motion. The transition process from undular bore to wave run-up appears to be different from that of a fully developed bore. The bore front overturns directly onto the dry beach surface, and the run-up is characterized by a thin splashed-up flow layer.
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7

Kishore, Gottam, Ranjay Kumar Singh, C. K. Saxena i Yogesh A. Rajwade. "Magnetic Treatment of Irrigation Water and its Influence on Radish (Raphanus sativus) crop: A Green Technology". Ecology, Environment and Conservation 28 (2022): 198–201. http://dx.doi.org/10.53550/eec.2022.v28i07s.032.

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Implementation of water treatment technologies for poor quality water may help reduce dependency on freshwater. One promising technology among water treatment technologies is magnetic water treatment (MWT). This study was aimed to evaluate the impact of bore water, hard water (1000 ppm) and saline water (electrical conductivity of 3 dS/m) on the plant biometric parameters and the yield of the radish. The water was treated in three stages: electrolysis, de-ionization and magnetization. In the pot culture experiment conducted, leaf length and leaf area index (LAI) was maximum under magnetized bore water treatment which was 22.7 cm and 6.2 compared to all other treatments respectively. The fresh weight (66.2 g) was highest in magnetically treated bore water, which was statistically significant over control. Among bore water treatments, the average yield per plant (48.5 t/ha) was maximum under magnetized bore water over control (43.9t/ha). Overall, the findings suggest that magnetically treated irrigation water positively influences plant growth parameters and the yield of radish.
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8

Arnason, Halldor, Catherine Petroff i Harry Yeh. "Tsunami Bore Impingement onto a Vertical Column". Journal of Disaster Research 4, nr 6 (1.12.2009): 391–403. http://dx.doi.org/10.20965/jdr.2009.p0391.

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In a laboratory wave tank, bores were generated by dam-break: by lifting a gate that initially separated quiescent shallow water from a volume of impounded water. The study was motivated by the problem of tsunami-structure interaction and sought to further the understanding of interactions between the bore-like flow of a broken tsunami wave and structures of different cross sections. Experiments were designed to observe the structure’s effect on the bore as well as the bore’s effect on the structure. This comprehensive study used highly repeatable experiments to measure water-surface variations, velocity flow fields, and forces exerted by bores on vertically erected columns. The temporal and spatial variations of the water-surface elevations were quantified with a Laser-Induced Fluorescence (LIF) technique; velocity flow fields were recorded with a combination of Laser Doppler Velocimeter (LDV) and Digital Particle Image Velocimetry (DPIV); forces on the columns were measured with a miniature load-cell transducer. The laboratory data obtained in the study are available for validating numerical models that predict forces on structures in unsteady flows.
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9

Haghi, Kevin R., i Dale R. Durran. "On the Dynamics of Atmospheric Bores". Journal of the Atmospheric Sciences 78, nr 1 (styczeń 2021): 313–27. http://dx.doi.org/10.1175/jas-d-20-0181.1.

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AbstractThe dynamics of a prototypical atmospheric bore are investigated through a series of two-dimensional numerical simulations and linear theory. These simulations demonstrate that the bore dynamics are inherently finite amplitude. Although the environment supports linear trapped waves, the supported waves propagate in roughly the opposite direction to that of the bore. Qualitative analysis of the Scorer parameter can therefore give misleading indications of the potential for wave trapping, and linear internal gravity wave dynamics do not govern the behavior of the bore. The presence of a layer of enhanced static stability below a deep layer of lower stability, as would be created by a nocturnal inversion, was not necessary for the development of a bore. The key environmental factor allowing bore propagation was the presence of a low-level jet directed opposite to the movement of the bore. Significant turbulence developed in the layer between the jet maximum and the surface, which reduced the low-level static stability behind the bore. Given the essential role of jets and thereby strong environmental wind shear, and given that idealized bores may persist in environments in which the static stability is constant with height, shallow-water dynamics do not appear to be quantitatively applicable to atmospheric bores propagating against low-level jets, although there are qualitative analogies.
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10

Guillaume, D. W., M. Norton i D. DeVries. "Dimensional considerations for small‐bore water manometers". Review of Scientific Instruments 60, nr 9 (wrzesień 1989): 3062–64. http://dx.doi.org/10.1063/1.1140604.

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Rozprawy doktorskie na temat "Bore water"

1

Nguyen, Thi Thu Hien. "Study of new exchangers for boron removal from water containing high concentration of boron". Thesis, Toulouse, INPT, 2017. http://www.theses.fr/2017INPT0138/document.

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Le bore est nécessaire pour le développement des plantes supérieures (structuration de la paroi végétale). Il pose cependant des problèmes (défoliation, pourriture et chute des fruits mûrs). Pour l’homme, sa toxicité se traduit par des nausées, des diarrhées, des troubles du développement intellectuel, neurologique et physique. La pénurie en eau douce conduit à dessaler l’eau de mer pour augmenter la quantité en eau destinée à la consommation humaine, l’industrie et l’agriculture. Lors de ce procédé, il faut éliminer les ions majeurs mais aussi le bore présent à des concentrations élevées (> 4,5 mg L–1, environ 0,45 mM). Son usage dans l’industrie et son rejet dans l’environnement conduisent à la pollution des eaux souterraines et de surface. Son élimination est donc indispensable, sachant que l’Organisation Mondiale de la Santé recommande une valeur guide de 0,5 mg L–1 dans l’eau potable et une valeur maximale de 0,3 mg L–1 dans l’eau utilisée pour l’irrigation. Cette thèse porte sur l’étude cinétique et thermodynamique des échanges du bore à la surface de différents matériaux en fonction de paramètres physico-chimiques (pH, concentration initiale …) à l’aide d’essais en réacteurs fermés et en colonnes. Deux types de résines commerciales ont été choisies : (i) les résines échangeuses d’anions Ambersep 900-OH et Amberlite IRA 402 Cl avec des fonctions ammonium, (ii) les résines spécifiques Amberlite IRA 743 et Diaion CRB 03 ayant des fonctions méthylglucamine. Les premières essais en réacteurs fermés montrent que les échanges liquide-solide sont rapides avec une élimination du bore > 96 % pour t < 30 min pour Amberlite IRA 743, Diaion CRB 03 et Ambersep 900-OH. Pour t > 2 h, un équilibre est observé pour toutes les résines. Le modèle du pseudosecond ordre permet de décrire la cinétique de sorption pour les 4 résines. A l’équilibre, l’adsorption est maximum d’une part dans une gamme de pH compris entre 6 et 12 pour les 2 résines sélectives Amb IRA 743 et CRB 03, et d’autre part pour un pH de 8 pour la résine Ambersep 900-OH et un pH 10 pour la résine Amberlite IRA 402 Cl. A pH 8 et pour les concentrations en bore < 20 mM, la sorption du bore est représentée par le modèle de type Langmuir pour Amberlite IRA 743, Ambersep 900-OH et Diaion CRB 03. Par contre, la rétention du bore sur Amberlite IRA 402 Cl suit une isotherme de type linéaire. A pH 8 et pour des concentrations en bore < 20 mM, les capacités de sorption sont : 1, 0,7, 0,3 et 0,05 mmol g–1 pour Diaion CRB 03, Amberlite IRA 743, Ambersep 900-OH et Amberlite IRA 402 Cl, respectivement. Les résines Ambersep 900-OH, échangeuse d’anions, et Amberlite IRA 743, sélective, ont été utilisées pour les essais en colonnes en fonction de la concentration en bore et du temps de séjour. Pour la résine spécifique, le temps de séjour dans la colonne affecte fortement le comportement du bore : lorsqu’il diminue, son élution est rapide suivie d’une longue traînée ; lorsqu’il augmente, la courbe de percée correspond à un système à l’équilibre. Pour un temps de séjour élevé, les résultats confirment la non-linéarité observée lors des essais en réacteurs fermés. Pour la résine échangeuse d’anions, la non-linéarité est aussi confirmée. Ces essais permettent de différencier le comportement du bore lors de sa désorption. La régénération est obtenue après des traitements acides et basiques pour la résine spécifique alors qu’un traitement alcalin est suffisant pour la résine anionique. Une étude plus détaillée des mécanismes est en cours et permettra de les intégrer dans un même modèle. La fixation du bore sur des pectines et sa rétention par des membranes d’ultrafiltration (membranes de seuil de coupure différent) a aussi été étudiée. Les pectines ont été caractérisées (composition en sucre et en bore présent initialement) et la viscosité des solutions pectiques mesurée. Des essais de filtration ont permis de déterminer l’efficacité de production et de rétention du bore sur ces matériaux
Boron is an element, which is necessary as essential nutrient for living organisms, especially for plants where it is involved in cell wall composition. But boron excess can cause some problems on the development of plants (defoliation, decay and fall unripe fruits), of humans and animals such as nausea, diarrhoea, dermatitis, lethargy. Boron toxicity also changes blood composition, caused disorder in neurological, physical, intellectual development. Nowadays, due to the shortage of fresh water sources, seawater desalination has been becoming an alternative fresh water supply. However, the presence of boron in seawater is quite high (4.5 mg L–1, around 4.5 mM). Moreover, the increasing use of boron in industries and its discharge to the environment has led to the contamination of surface and ground waters. As the result, boron removal, in production of drinking water becomes very important. Therefore, the World health organization has recommended a guideline of 0.5 mg L–1 B in drinking water and a maximum limit of 0.3 mg L–1 B in fresh water used for irrigation. The objective of this thesis is to study the mechanisms of boron surface exchange on different materials versus time and at equilibrium depending on some physicochemical parameters such as pH, initial boron concentration, reaction time in order to find a new exchanger for boron removal. Boron removal was carried out by ion exchange process using 2 types of resins: Amberlite IRA 743, Diaion CRB 03 as boron selective resins with methylglucamine functions, and Ambersep 900-OH and Amberlite IRA 402 Cl as anionic exchange resins with ammonium functions. From batch studies, fast exchange between resin surface and liquid phase was observed with boron removal up to at least 96 % within 30 min for Amberlite IRA 743, Diaion CRB 03 and Ambersep 900- OH. The reaction between resin surface and boron solution reached equilibrium after 2 h for all the resins. The pseudo-second order kinetic model was used to well describe the sorption kinetic process of the resins. At equilibrium, the experimental results showed that the maximum adsorption was observed to be achieved at pH 8 for Ambersep 900- OH, pH 10 for Amberlite IRA 402 Cl and independent on pH range from 6 to 12 for the 2 boron selective resins Amberlite IRA 743 and Diaion CRB 03. At pH 8 and for boron concentrations < 20 mM, the Langmuir-type relationship was used to fit the experimental data for Amberlite IRA 743, Ambersep 900- OH and resin Diaion CRB 03. In the range of studied boron concentration, the boron sorption onto Amberlite IRA 402 Cl followed linear-type behaviour. At pH 8 and for boron concentrations < 20 mM, the sorption capacities are: 1, 0,7, 0,3 et 0,05 mmol g–1 for Diaion CRB 03, Amberlite IRA 743, Ambersep 900- OH and Amberlite IRA 402 Cl, respectively. Column experiments were performed with the anionic resin Ambersep 900-OH and the selective one Amberlite IRA 743 by studying both the influence of boron concentration and the residence time. For the selective resin, if the residence time decreases, the boron breakthrough is fast followed by a long tail. For larger residence time, local equilibrium seems to be assumed. Results are thus consistent with batch experimental data. For the anionic resin, the nonlinear behaviour is also confirmed. Moreover, column experiments showed a strong difference during desorption. To regenerate resins, acid and basic treatments are necessary for the selective resin although a basic solution is enough for the anionic resin. A more detailed study of mechanisms is in progress in order to build a exchange model for predicting boron fate. Finally, characterization of pectins was also performed. Its composition (sugar and boron content) and the viscosity of pectin solutions were quantified. Filtration experiments allowed testing the efficiency of such material to remove boron too
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2

Cowley, Robyn Anne. "The effect of changing water distribution from linear to point source on vegetation and soil following piping of an artesian bore in a semi-arid mulga paddock /". [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16636.pdf.

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Kanso, Sungwan, i n/a. "Molecular Studies of Bacterial Communities in the Great Artesian Basin Aquifers". Griffith University. School of Biomolecular and Biomedical Science, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040219.140509.

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16S rRNA gene analysis has shown that bacterial diversity in the GAB bores studied was limited to the genera Hydrogenobacter in the phylum Aquificae, Thermus in the phylum Deinococcus-Thermus, Desulfotomaculum in the phylum Firmicutes, the alpha-, beta- and gamma-classes of the phylum Proteobacteria and the phylum Nitrospirae. There was no clone closely related to members of the delta-proteobacteria and epsilon-proteobacteria classes detected. The number of bacterial strains directly isolated from the Fairlea and the Cooinda bores were far less than the numbers of distinctive phylotypes detected by the 16S rRNA gene characterisation. In addition none of the bacterial strains directly isolated from the water samples were represented in the 16S rRNA gene clone libraries. Similar discrepancies between the bacterial populations obtained from the 16S rRNA gene analysis and those obtained from direct isolation have been reported in the literature (Dunbar et al., 1999; Kampfer et al., 1996; Suzuki et al., 1997; Ward et al., 1998; Ward et al., 1997). However, in general, the phyla with which the isolates were affiliated were the same as those phyla to which the clones belonged. The environmental changes introduced (by bringing the artesian water up to the surface and exposing it to four types of metal coupons made of carbon steels identified by codes ASTM-A53B, ASTM-A53, AS-1074 and AS-1396 and commonly used in bore casings) led to changes in the bacterial community structures. In general, the species which proliferated in the communities before and after the changes were different. The diversity of the bacterial species in the community decreased following the environmental changes. Clones dominating the clone libraries constructed from newly established bacterial communities also differed from the clones dominating the libraries constructed from the bacterial communities which had existed naturally in the bores. These trends toward change in the bacterial communities were observed at both the Fairlea and the Cooinda bore sites. All four metal types incubated in the Fairlea bore water lost between 3.4 and 4.7% of their original weight. In contrast none of the metals incubated in Cooinda bore water lost weight. Clone library A1 showed that the natural population of the Fairlea bore was dominated by clone A1-3, which represented a novel species related to the isolate boom-7m-04. But after metal incubation (and recording of the metal weight loss), the bacterial community was dominated by clone PKA34B, which has a 95% similarity in its 16S rRNA gene sequence with Desulfotomaculum putei. Desulfotomaculum species are known to cause metal corrosion due to their byproduct H2S. But the low level of phylogenetic relatedness found does not provide enough information to speculate on whether the species represented by clone PKA34B is a member of the genus Desulfotomaculum or not. However, the fact that clone PKA34B dominated the PKA clone library by 50% makes the species it represents a suspected candidate likely to be involved with the metal weight loss at the Fairlea bore. In contrast, clone library 4381 showed that the natural population of the Cooinda bore was dominated by clone 4381-15 representing a species distantly related to a hydrogen oxidiser Hydrogenophaga flava (95% similarity). The dominating clone of the new community formed after metal incubation was clone COO25, which has 99% similarity with Thermus species that have not been reported to be involved with metal corrosion to my knowledge. In this project detection, identification and comparative quantification by 16S rRNA gene-targeted PCR probing with probes 23B and 34B were successfully developed for a Leptothrix-like species and for a Desulfotomaculum-like species represented by clones PKA23B and PKA34B respectively. This method of probing permits a fast, sensitive and reproducible detection, identification and at least a comparative quantification of the bacteria in the environment without the need for culturing. Therefore it is extremely suitable for use in bacterial population monitoring. PCR probing with the 34B probe has a potential commercial use as a means of screening for bores with a potential high risk of corrosion due to this Desulfotomaculum-like species. Direct isolation of bacteria from the GAB water has resulted in the isolation of seven strains from the Fairlea bore and eight from the Cooinda bore. Among these isolates, three novel strains were studied in detail. Reports on the characterisation of strain FaiI4T (T=Type strain) from the Fairlea bore (Kanso & Patel, 2003) and strain CooI3BT from the Cooinda bore have been published (Kanso et al., 2002). The data generated during this project add to our current information and extend our knowledge about the bacterial communities of the GAB's sub-surface environment. This information will provide a basis for further ecological studies of the GAB. Studies on involvement of certain groups of bacteria with the corrosion of metals used in bore casings could provide a foundation for further studies to develop maintenance and managing strategies for the GAB bores.
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4

Kanso, Sungwan. "Molecular Studies of Bacterial Communities in the Great Artesian Basin Aquifers". Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366613.

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16S rRNA gene analysis has shown that bacterial diversity in the GAB bores studied was limited to the genera Hydrogenobacter in the phylum Aquificae, Thermus in the phylum Deinococcus-Thermus, Desulfotomaculum in the phylum Firmicutes, the alpha-, beta- and gamma-classes of the phylum Proteobacteria and the phylum Nitrospirae. There was no clone closely related to members of the delta-proteobacteria and epsilon-proteobacteria classes detected. The number of bacterial strains directly isolated from the Fairlea and the Cooinda bores were far less than the numbers of distinctive phylotypes detected by the 16S rRNA gene characterisation. In addition none of the bacterial strains directly isolated from the water samples were represented in the 16S rRNA gene clone libraries. Similar discrepancies between the bacterial populations obtained from the 16S rRNA gene analysis and those obtained from direct isolation have been reported in the literature (Dunbar et al., 1999; Kampfer et al., 1996; Suzuki et al., 1997; Ward et al., 1998; Ward et al., 1997). However, in general, the phyla with which the isolates were affiliated were the same as those phyla to which the clones belonged. The environmental changes introduced (by bringing the artesian water up to the surface and exposing it to four types of metal coupons made of carbon steels identified by codes ASTM-A53B, ASTM-A53, AS-1074 and AS-1396 and commonly used in bore casings) led to changes in the bacterial community structures. In general, the species which proliferated in the communities before and after the changes were different. The diversity of the bacterial species in the community decreased following the environmental changes. Clones dominating the clone libraries constructed from newly established bacterial communities also differed from the clones dominating the libraries constructed from the bacterial communities which had existed naturally in the bores. These trends toward change in the bacterial communities were observed at both the Fairlea and the Cooinda bore sites. All four metal types incubated in the Fairlea bore water lost between 3.4 and 4.7% of their original weight. In contrast none of the metals incubated in Cooinda bore water lost weight. Clone library A1 showed that the natural population of the Fairlea bore was dominated by clone A1-3, which represented a novel species related to the isolate boom-7m-04. But after metal incubation (and recording of the metal weight loss), the bacterial community was dominated by clone PKA34B, which has a 95% similarity in its 16S rRNA gene sequence with Desulfotomaculum putei. Desulfotomaculum species are known to cause metal corrosion due to their byproduct H2S. But the low level of phylogenetic relatedness found does not provide enough information to speculate on whether the species represented by clone PKA34B is a member of the genus Desulfotomaculum or not. However, the fact that clone PKA34B dominated the PKA clone library by 50% makes the species it represents a suspected candidate likely to be involved with the metal weight loss at the Fairlea bore. In contrast, clone library 4381 showed that the natural population of the Cooinda bore was dominated by clone 4381-15 representing a species distantly related to a hydrogen oxidiser Hydrogenophaga flava (95% similarity). The dominating clone of the new community formed after metal incubation was clone COO25, which has 99% similarity with Thermus species that have not been reported to be involved with metal corrosion to my knowledge. In this project detection, identification and comparative quantification by 16S rRNA gene-targeted PCR probing with probes 23B and 34B were successfully developed for a Leptothrix-like species and for a Desulfotomaculum-like species represented by clones PKA23B and PKA34B respectively. This method of probing permits a fast, sensitive and reproducible detection, identification and at least a comparative quantification of the bacteria in the environment without the need for culturing. Therefore it is extremely suitable for use in bacterial population monitoring. PCR probing with the 34B probe has a potential commercial use as a means of screening for bores with a potential high risk of corrosion due to this Desulfotomaculum-like species. Direct isolation of bacteria from the GAB water has resulted in the isolation of seven strains from the Fairlea bore and eight from the Cooinda bore. Among these isolates, three novel strains were studied in detail. Reports on the characterisation of strain FaiI4T (T=Type strain) from the Fairlea bore (Kanso & Patel, 2003) and strain CooI3BT from the Cooinda bore have been published (Kanso et al., 2002). The data generated during this project add to our current information and extend our knowledge about the bacterial communities of the GAB's sub-surface environment. This information will provide a basis for further ecological studies of the GAB. Studies on involvement of certain groups of bacteria with the corrosion of metals used in bore casings could provide a foundation for further studies to develop maintenance and managing strategies for the GAB bores.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Biomolecular and Biomedical Sciences
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Yang, Ting. "Maturation of Clay Seals in Deep Bore Holes for Disposal of Radioactive waste : Theory and Experiments". Doctoral thesis, Luleå tekniska universitet, Geoteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65794.

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KBS-3 and very deep borehole (VDH) concepts are two major types of long-term geologicaldisposal methods for high-level radioactive waste (HLW) isolating from the biosphere. TheKBS-3V concept for isolating the HLW at the depth of 400-500 m, is the officially proposedoption in Sweden and has been the subject of considerable research in the past few decades,while the VDH concept was considered as an option in the 1950s but later became discouragedbecause of insufficient experience in drilling technology. The greatest merit of the VDHconcept is that the almost stagnant groundwater in the deep boreholes prevents the transport ofthe possible release of radionuclides into the rock or up to the ground level. Since variousdisadvantages of the KBS-3V concept were found in previous research, the superiority of VDHconcept attracted the researchers to continue studying it into the late 1980s.The geological repositories of both of KBS-3V and VDH types primarily consist of a naturalbarrier (host rock) and of an engineering barrier (also known as a buffer/backfill barrier).According to the principle of IAEA and national relative research organizations, thebuffer/backfill material should have low permeability and good expandability, as well assuitable physical and sealing properties.The thesis concerns the VDH concept and is focused on the construction and performance ofthose parts of the sealed repository that are not affected by high temperature or gamma radiation.In the lower part of a VDH repository, the clay packages containing HLW will be exposed tohigh temperature (100-150 􀄇 ) in the borehole and to highly saline groundwater. In theinstallation phase of HLW, the groundwater will be pumped out and replaced by medium-softsmectite clay mud in which the HLW packages are installed vertically. During the hydrationand maturation of the clay components, the microstructural reorganization, water transport,migration of clay particles and redistribution of the density of the components take place. Thematuration determines the transient evolution of the clay seals and influences the rheologicaland soil mechanical behavior in the installation phase. The maturation of clay system alsodetermines their ultimate sealing potential of VDH repositories.This study presents the work carried out for investigating the maturation of the buffer-backfillclay in the HLW deep borehole. Initially in the study three types of clays, the Namontmorillonite,magnesium-rich and illite-smectite mixed layer clays, were examined for estimating their performance as the barrier candidate material. This is mainly presented in theliterature review. The experimental study was conducted on montmorillonite GMZ clays andI/S mixed-layer Holmehus clay. The expandability and permeability tests were carried out forinterpretation of the recorded swelling development and assessment of the effect of the salineconditions, with the goal of deriving a relationship between swelling pressure and hydraulicconductivity for different dry densities. The maturation tests of initially fully-saturatedHolmehus clay and partly saturated GMZ clay were performed. During the tests, the shearstrength mobilised by the relative movement of densified mud and migrated dense clay -contained in a perforated central tube - were determined. According to the results of shearstrength tests, the maximum operation time or the number of clay packages to be placed in asingle operation was evaluated, whilst the suitable saturation degree of the dense clay wasdiscussed as well.A model of the maturation of initially water-saturated clay seals based on Darcy’s law wasworked out and the evolution of the clay components in a lab-scale borehole using Holmehusclay were performed and compared with the experimental recordings. Good agreementsbetween the physical behaviors of the theoretical simulations and the measurements wasachieved by which the validity of the model was verified. Using the results, the hydration andsoil migration in the entire maturation process were presented in diagram. The model was alsoused for preliminary evaluation of the maturation products in real boreholes by assuming thesame Holmehus clay as used in the tests. Two constellation of borehole and dense clay withdifferent diameters, 80 cm borehole /60 cm clay and 80cm/50cm, were assumed. The resultsrespecting dry density and hydraulic conductivity of the ultimate maturation products, and thedegree of homogeneous of the buffer and backfill clay system in the assumed boreholes, arepresented and discussed. The options of different mineral types and initial physical propertiesof the candidate buffer clays provide a reference for engineering barrier design of HLW disposalin VDH.
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Aldosary, Huda A. KH. "Polycyclic Aromatic Hydrocarbon Degradation by Anaerobic Bacteria from the Great Artesian Basin". Thesis, Griffith University, 2020. http://hdl.handle.net/10072/393639.

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The Great Artesian Basin (GAB) is a vast subterranean thermal aquifer system underlying over 20% of the Australian continent. Substantial reserves of oil, gas and minerals exist within the GAB and combined with industrial activities can often contaminate the groundwaters. The current study investigated the bacterial ecology of bore waters that were in or close to oil deposits. Three sites were selected, two in the Quilpie/Eromanga region of Queensland (Naretha bore registered number 4022 and Adavale bore registered number 305), and the other in the Moomba oil field of South Australia (Moomba bore 9). A wide diversity of bacteria was detected across all of the samples collectively, including members of 32 bacterial phyla. There was greater diversity in the water samples from bores 4022 and 305 compared with Moomba 9, which was likely due to its closer association with oil. The most dominant bacterial taxa were similar in bores 4022 and 305, families Rhodobacteraceae, and Xanthomonadaceae and the order Bacillales. In contrast, the dominant taxa from Moomba 9 were the family Oxalobacteriaceae and the genus Agrococcus. Three different water samples were tested from bore 4022, from the source, 100 m and 250 m downstream in the runoff channel water. The bacterial diversity increased the further away the water flowed from the bore, due to the cooler water and contamination from the surrounding environment. A comprehensive anaerobic thermophilic enrichment program revealed that bacteria grew on a wide variety of organic substrates and a range of heavy metals as terminal electron acceptors. Isolation yielded 164 bacteria capable of using substrates from sugars and extracts through to polycyclic aromatic hydrocarbons (PAH) and reducing the metals iron(III), vanadium(V), cobalt(III) and manganese(IV). Seven pure iron(III) reducing polycyclic aromatic hydrocarbon (PAH) degrading bacteria, designated strains RN40AT, RN40BT, RN40CT, RN40DT, RN305AT, RN305BT and MBA9BT, were selected for further studies. The rates of degradation Polycyclic Aromatic Hydrocarbon Degradation by Anaerobic Bacteria from the Great Artesian Basin and PAH preference varied significantly between the isolates. Strain MBA9BT showed the highest extent (97.6%) of anthracene degradation while strain RN305BT was the lowest (9.7%). Again, strain MBA9BT also showed the highest extent (91.2%) of pyrene degradation and strain RN40DT showed the lowest (16.1%). Phenanthrene degradation was highest in strain RN40BT and the lowest in strain MBA9BT (2%). PAH degradation in all the isolates showed a direct dependence on Fe(III) reduction. A measurable decrease in the surface tension of the medium suggested the production of biosurfactants by all isolates when grown with PAHs as substrates. Genomic analysis of the isolates revealed subsystems of different pathways that are commonly found in metal acquisition, transport and utilisation as well as those for aromatic hydrocarbon degradation. Strain RN40DT had the highest number of genes involved in the metabolism of PAHs, though all of the isolates had genes for the metabolism of central aromatic intermediates, especially those related to catechol, salicylate and homogentisate degradation. The isolates had varying levels of genes involved in the metabolism and resistance to iron, copper, chromium, zinc, molybdenum, manganese and mercury. Strains RN40AT, RN305AT RN305BT, RN40BT and RN40DT contained the most genes for iron acquisition and metabolism including those for siderophores, hemin transporters and ferric ABC transport systems. The results in the current study have built upon our understanding of bacterial diversity in the GAB, particularly with insights into waters associated with oil deposits. Bacteria that degrade polycyclic aromatic hydrocarbons with the simultaneous reduction of Fe(III) under anaerobic conditions were isolated for the first time and may have significant potential in bioremediation of contaminated groundwaters.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
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Vatanen, V. (Varpu). "”She waited and breathed, and the water didn’t come. The ice bore her.”:Satumaisen maaginen selviytymistarina: Eowyn Iveyn romaani The Snow Child lapsettomuuden kriisin ja surutyön prosessin allegorisena kuvauksena". Master's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201811293148.

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Tutkielmani aiheena on alaskalaisen Eowyn Iveyn esikoisromaani The Snow Child (2012) lapsettomuuden kriisin ja surutyön prosessin allegorisena kuvauksena. Teos käsittelee raskaita asioita ihmeellisen herkällä tavalla: Ivey kuvaa masennusta, surua ja lapsettomuuden kriisiä osin realistisesti, osin maagisen realismin, sadun ja fantastisen keinoin. Runsas symboliikka ja maagiset elementit realistisen masennus- ja selviytymiskertomuksen rinnalla tarjoavat mahdollisuuden koko teoksen allegoriseen lukemiseen. Tutkielmassani keskityn lapsettomuuden kriisiin ja surutyön prosessiin lähinnä naishahmo Mabelin kautta. Miehiset hahmot jäävät sivummalle johtuen feministisen ja ekofeministisen tutkimusotteen merkityksestä tutkielmassani. Tutkielmani nimessä esiintyvä lainaus teoksesta on allegorinen viitaten melankolisen Mabelin tilaan ja Mabelin ja talvisin ilmestyvän lumityttö Fainan suhteeseen: jää kantaa masentunutta Mabelia sittenkin, eikä hän huku. Lainauksen allegorisuus selittyy tulkinnallani Fainasta Mabelin pelastajana, keinona, jolla Mabel selviytyy surustaan. Faina, Mabelin lisäksi teoksen toinen merkittävä naishahmo, on maaginen mysteeri ja sellaiseksi myös jää teoksen lopussa. Fainan alkuperästä, olemuksesta ja sen merkityksestä teoksessa esitän pohdintoja ja hypoteeseja useassa luvussa. Pyrin perustelemaan päätelmiäni tutkimalla teoksessa esiintyviä eri genrejä ja niiden suhdetta allegoriaan, osoittamalla teoksen intertekstuaalisia yhteyksiä eri hypoteksteihin, erityisesti satuihin, ja ennen kaikkea analysoimalla löytämiäni allegorisia piirteitä lähemmin sekä viittaamalla psykologisiin tutkimuksiin. Teos sijoittuu Alaskaan, ja luonnon kuvaus on siinä oleellista. Käsittelenkin melko laajasti teoksen luontosymboliikkaa allegorisuuden tuottajana ja merkittävänä osana tulkintaa. Teoksen suhde luontoon perustelee myös ekofeministisen lähestymistavan feministisen ja psykologisen tutkimusotteeni ohessa. Ekofeminismi liittyy ajatukseeni käsittää Faina paitsi liminaalitilassa olevaksi tytöksi ja osin Mabelin psyyken luomaksi fantasiaksi, myös Alaskan ja Toiseuden symboliksi. Osoitan Iveyn teosta analysoimalla myös sen kantaaottavuuden äitiyden rooliin ja sen ongelmiin. Psykologista tutkimusotetta edustavat äitiyden kriisien tutkimukseen keskittyneet psykoanalyyttiset ja psykologiset tutkimukset, joita käytän Mabelin tilan selittämisessä. Mabelin masennuksen ja surutyön kaaren tarkastelun yhteydessä käytän myös lääketieteellisiä lähteitä havainnollistamaan ja perustelemaan Mabelin toimintaa. Jo mainitsemani liminaalisuus on työssäni olennaista, ja pyrin lääketieteellisin ja psykologisin lähtein täsmentämään tutkielmassa esittämiäni ajatuksia masennuksesta liminaalitilana. Haluan myös nostaa esille uutta alaskalaista naiskirjallisuutta, sillä Iveystä ei ole juuri tehty tutkimuksia. Tutkimukseni perusteella koko teoksen voi lukea surutyön allegoriana, jossa on elementtejä maagisesta realismista ja fantastisesta. Teoksessa kuvattujen lapsettomuuden surun ja masennuksen ollessa fiktion ulkopuolellakin olemassa olevia ongelmia esitän, että teosta voisi hyvin käyttää myös kirjallisuusterapiassa. Allegorisen tulkinnan kautta teoksen voi käsittää melankolisuudestaan huolimatta viestivän toivosta ja elämän hyvyydestä.
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Vatn, Karsten Dånmark. "Optimization of water-borne crude oil transport". Thesis, Norwegian University of Science and Technology, Department of Engineering Cybernetics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9544.

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A ship scheduling problem in optimization of water-borne crude oil transportation has been investigated. The classic optimization problem the most closely related to the problem at hand is the Multi-Vehicle-Pick-up-and-Delivery Problem with Time Windows (m-PDPTW). In addition to the basic characteristics of the m-PDPTW, the studied problem has an additional degree of freedom due to having pick-ups and deliveries that are not matched. This extra freedom gives new possibilities when creating effective heuristics when dealing with transportation problems. The studied problem has been presented in relation to carefully selected background literature. On this basis a proposed heuristic has been developed, and implemented using some already existing structures in the commercial decision support system TurboRouter. The studied problem is an industrial shipping problem, an operational mode where the shipper owns the cargo to be transported. No income is therefore made directly from transporting goods. Therefore the objective function chosen was net income, which in this mode is the same as minimizing the net expenses. A multi-start local search with pre-matching of pick-ups and deliveries heuristic was chosen based on an assessment of problem size, problem type, real life applicability and existing software. This heuristic consists of three main parts. First the pick-ups and deliveries are matched and merged in a pre-matching heuristic, and then a large number of initial solutions are generated by an insertion heuristic. The best initial solutions are then improved by a local search. Two strategies were developed for pre-matching and then tested. The one with the best test results was subsequently used in the heuristic. This multi-start local search with pre-matching of pick-ups and deliveries heuristic has been subject to rigorous testing and was compared to a single-start local search and multiple initial solutions heuristic. The solutions generated by the multi-start local search heuristic were superior compared to those of the other heuristics, but the computation time necessary was high and higher than those of the heuristics which it was compared to. This high computation time is partially believed to be a result of flexible data sets resulting in broad solution spaces. In addition some computationally expensive heuristics were deployed, increasing the computation time. In real life applications, finding a solution relatively quickly is of importance. Therefore the heuristic may need to be simplified and used on "tighter" data sets than some sets used in testing to be real life applicable.

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Trueman, Richard Edward. "Self segregation in water-borne latex coatings". Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610438.

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Quinn, Megan, i B. O'Connell. "Water-Borne Disease From a Global Perspective". Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/6808.

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Książki na temat "Bore water"

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Wheaton, John. Ground-water flow through inadequately plugged coal exploration bore holes. Bozeman, MT: Montana University System, Water Resource Center, 1996.

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Ibrahim, Kasirye, red. Cost-effectiveness of water interventions: The case for public stand-posts and bore-holes in reducing diarrhoea among urban households in Uganda. Kampala, Uganda: Economic Policy Research Centre, 2011.

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Thorn, Condé R. Results of well-bore flow logging for six water-production wells completed in the Santa Fe Group aquifer system, Albuquerque, New Mexico, 1996-98. Albuquerque, N.M: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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Thorn, Condé R. Results of well-bore flow logging for six water-production wells completed in the Santa Fe Group aquifer system, Albuquerque, New Mexico, 1996-98. Albuquerque, N.M: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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Thorn, Condé R. Results of well-bore flow logging for six water-production wells completed in the Santa Fe Group aquifer system, Albuquerque, New Mexico, 1996-98. Albuquerque, N.M: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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Water becomes bone. Kalamazoo, Mich: New Issues Press, Western Michigan University, 2000.

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Brossard, Nicole. Museum of bone and water. Toronto, ON: House of Anansi Press, 2003.

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Samakh, Erik. Au bord de l'eau. Val-D'Oise: Abbaye de Maubuisson, 2006.

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Gouba, Annick. Eau et paix au Moyen-orient: La mer à boire, une solution durable. Paris: L'Harmattan, 2007.

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Nigro, Giampiero, red. Gestione dell'acqua in Europa (XII-XVIII Secc.) / Water Management in Europe (12th-18th centuries). Florence: Firenze University Press, 2018. http://dx.doi.org/10.36253/978-88-6453-700-9.

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Water was a source of wealth which facilitated, fostered or brutally halted economic development in the Ancien Regime. Lack of hygiene meant that water was used less for drinking than other drinks, but as a raw material, source of energy, cooling, rinsing and cleansing agent, water was unequalled. It played a role in public and private relaxation and in health. Water also proved to be an ideal, safe and cheap means of transporting goods and ideas. Urban historians have long pointed to the enormous comparative advantage enjoyed by towns and regions whose favourable maritime or riverine location gave them access to cheap water-borne transport. But water just as often posed a threat to economic development and prosperity, whether due to its absence or its specific composition or level of pollution or to uncontrollable abundance. This duality is still present today in our modern, globalised society. While huge quantities of fresh, potable water are wasted in the West, free or cheap access to fresh and abundant water supplies remains a major challenge for millions of individuals on the planet. Major floods in different parts of the world regularly cause economic damage and endless human suffering. With a Settimana devoted to the management of the water supply, excluding related topics as water consumption, water transport and the use of water in agriculture and industry, the Istituto Datini is seeking to draw attention.
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Części książek na temat "Bore water"

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Yeh, Harry H. "Turbulence Generation in a Bore". W Water Wave Kinematics, 525–34. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0531-3_33.

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Lim, Nathaniel Dylan, i Diganta Das. "Digging Deeper: Deep Wells, Bore-Wells and Water Tankers in Peri-Urban Hyderabad". W Water Security, Conflict and Cooperation in Peri-Urban South Asia, 89–103. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-79035-6_5.

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AbstractHyderabad in India is a rapidly growing city and a popular global hub of high-tech and information technology industries. With its aspiration to be a global destination for transnational companies and engine of economic growth for the twenty-first century, it is rapidly urbanizing and expanding outward with intense infrastructure development. With this rapid expansion, the city increasingly witnesses water insecurity, especially in its peri-urban areas. To supply the high-tech and aspirational pockets of Hyderabad, water has been piped and sourced from far-away reservoirs, deep wells, and borewells, as well as through water tankers that collected water from the surrounding peri-urban areas. These unsustainable practices have led to groundwater shortages and severe water insecurity for the ordinary residents living at the edge of the city. Through a grounded understanding based on ethnographic fieldwork, this chapter delves into the everyday experiences of water insecurity in peri-urban Hyderabad. The chapter discusses the context of vulnerability and ways of coping in relation to water insecurity in peri-urban communities. It seeks to give a micro- and nuanced view of rural-urban relationships around water in Hyderabad, in a context of water-related conflicts, privatization and (piped) connections between the urban and peri-urban localities.
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Rinaudo, Jean-Daniel, Marielle Montginoul i Jean-François Desprats. "The Development of Private Bore-Wells as Independent Water Supplies: Challenges for Water Utilities in France and Australia". W Understanding and Managing Urban Water in Transition, 155–74. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-9801-3_7.

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Szálkai, Kinga. "Water-Borne Diseases". W The Palgrave Encyclopedia of Global Security Studies, 1–7. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-74336-3_562-1.

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Robinson, Peter, Michael Lück i Stephen Smith. "Water-borne transport." W Tourism, 119–36. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789241488.0119.

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Gooch, Jan W. "Water-Borne Coatings". W Encyclopedic Dictionary of Polymers, 805. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_12701.

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Szálkai, Kinga. "Water-Borne Diseases". W The Palgrave Encyclopedia of Global Security Studies, 1540–46. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-319-74319-6_562.

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Hakim, G. "Water-Borne Urethane Resins". W Surface Coatings, 173–78. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1220-8_10.

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Owen, S. "Epoxy Resins—Water-Borne". W Surface Coatings, 193–97. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1220-8_12.

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Balks, M. R., i D. Zabowski. "Soils Born of Water". W Celebrating Soil, 39–64. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32684-9_3.

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Streszczenia konferencji na temat "Bore water"

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Nakao, Yohichi, Tsubasa Yaguchi, Dmytro Fedorynenko i Junpei Kusuyama. "Effects of Shaft-Bore Water Flow Cooling of High-Speed Spindle Supported With Water-Lubricated Hydrostatic Bearings on Thermal Stability". W ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5651.

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Abstract In this paper, the thermal stability of a spindle with water-lubricated hydrostatic bearings was investigated. In order to improve the thermal stability of the spindle, a center bore water cooling structure was designed in the rotor. Influences of the center bore water cooling on not only thermal stability but also temperature control performance of the spindle was studied via simulations and experiments. Power losses due to water flows in the spindle were considered. Based on a derived lumped parameter model, the temperature changes of the water flow and spindle were predicted. As used in many machine tool components, it was verified that the center bore cooling are effective to improve the thermal stability of the spindle. An influence of structural change of the rotor due to the center bore on the heat capacity and time constant was investigated. As a result, the time constant in terms of the thermal characteristics is decreased due to the center bore structure. Because of this feature, the temperature control performance can be improved.
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Bruehl, Markus, Sander Wahls, Ignacio Barranco Granged i Philipp L. F. Liu. "Analysis of Bore Characteristics Using KdV-Based Nonlinear Fourier Transform". W ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-19074.

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Abstract Bores propagating in shallow water transform into undular bores and, finally, into trains of solitons. The observed number and height of these undulations, and later discrete solitons, is strongly dependent on the propagation length of the bore. Empirical results show that the final height of the leading soliton in the far-field is twice the initial mean bore height. The complete disintegration of the initial bore into a train of solitons requires very long propagation lengths, but unfortunately these required distances are usually not available in experimental tests or nature. Therefore, the analysis of the bore decomposition for experimental data into solitons is difficult and requires further approaches. Previous studies have shown that by application of the nonlinear Fourier transform based on the Korteweg–de Vries equation (KdV-NFT) to bores and long-period waves propagating in constant depth, the number and height of all solitons can be reliably predicted already based on the initial bore-shaped free surface. Against this background, this study presents the systematic analysis of the leading-soliton amplitudes for non-breaking and breaking bores with different strengths in different water depths in order to validate the KdV-NFT results for non-breaking bores, and to show the limitations of wave breaking on the spectral results. The analytical results are compared with data from experimental tests, numerical simulations and other approaches from literature.
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Liu, Jiaqi, Masoud Hayatdavoodi i R. Cengiz Ertekin. "Bore Pressure on Horizontal and Vertical Surfaces". W ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96013.

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Abstract Bores generated by dam-break and initial mound of water and their propagation over horizontal and inclined surfaces are studied by use of theoretical approaches. Calculations are carried out in two and three dimensions and particular attention is given to the bore impact on horizontal and vertical surfaces. Downstream of the initial mound of water may be wet or dry. Discussion is provided on the influence of the downstream water on the bore behaviour and impact. Three methods are used in this study, namely the Reynolds-Averaged Navier-Stokes equations (RANS), the Green-Naghdi (GN) equations and Saint Venant equations (SV). The governing equations subject to appropriate boundary conditions are solved with various numerical techniques. Results of these models are compared with each other, and with laboratory experiments when available. Discussion is given on the limitations and applicability of these models to study the bore generation, propagation and pressure on horizontal and vertical surfaces. It is found that the GN equations compare well with the RANS equations, while the SV equations have substantially simplified the solution.
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Liu, Huaxing, Soon Keat Tan, Jing Li i Xikun Wang. "Three Dimensional Simulation of Bore Flow Using SPH". W ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-21090.

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Tidal bore is a fascinating and powerful hydraulic phenomenon. In this paper, the tidal bore’s process is studied using 3D Smooth Particle Hydrodynamic (SPH) model. The Lagrangian nature of SPH suits well to the modeling of the complex fluid flow phenomenon. In the SPH method, the Navier-Stokes equations are discretized with fluid particles in the Lagrangine sense. Boundary conditions, including both no slip wall and bottom wall, are implemented using dynamic boundary particles. Using SPH, the bore’s generation together with its traverse along the channel are presented, including the description of flow field and bore’s configuration. Different types of bores’ behavior are investigated. It is observed that there is a splash of water surge up the wall and the front of the bore becomes a breaker wave when the initial water column travels at high speed. The velocity field and bore heights at different locations are visualized and discussed as well.
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Matsutani, Takashi, Takanori Nakada, Yoshikazu Shinpo i Makoto Hatano. "Water Jacket Spacer for Improvement of Cylinder Bore Temperature Distribution". W SAE 2005 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2005. http://dx.doi.org/10.4271/2005-01-1156.

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Andersen, Tore Roberg, i Jan Ivar Skar. "Gas and Water Permeation in Flexible Pipes". W ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28053.

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A test program has been performed to obtain the permeation coefficients for methane, carbon dioxide and water in PVDF. Small-scale tests showed that water is transported through the PVDF inner sheath of the flexible pipes, and into the annulus. A large-scale test was carried out to verify the small-scale test results. It was performed in a 2″ flexible pipe with length 3 m. The bore temperature and pressure were 100°C and 50 bar, respectively. The pipe was submerged in cold water in order to get a correct temperature gradient in the pipe. The test showed that the annulus of flexible pipe with PVDF inner sheath would become water wet due to permeation, depending upon the bore and annulus conditions.
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Brühl, Markus, i Hocine Oumeraci. "Analysis of Propagation of Long Waves in Shallow Water Using the KdV-Based Nonlinear Fourier Transform (KdV-NLFT)". W ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24165.

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Hydraulic model tests and numerical simulations show that long sinusoidal waves that are generated in very shallow waters are not stable but show modifications of the free surface as function of propagation in time and space. First, with increasing distance from the wave maker the wave becomes asymmetric and develops into a bore-shaped wave. Second, with further increasing distance more and more additional wave crests appear from the front of the bore (undular bore). The shallower the water depth, the more additional wave components can be observed. In extremely shallow water, the periodic sine waves completely disintegrate into periodic trains of solitons. At Leichtweiss-Institute for Hydraulic Engineering and Water Resources (LWI), TU Braunschweig, a nonlinear Fourier transform based on the Korteweg-deVries equation (KdV-NLFT) is implemented and successfully applied in Brühl [1] that provides an explanation for this nonlinear phenomenon and allows the prediction of the dispersion and propagation of long sinusoidal waves in shallow water.
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Hartmann, Robin A., Gerd Olaug Vikeså i Per A. Kjærnes. "Big bore, high flowrate, deep water gas wells for Ormen Lange". W Offshore Technology Conference. Offshore Technology Conference, 2004. http://dx.doi.org/10.4043/16554-ms.

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Dobson, Alan, i Peter Fellows. "Development of a Large Bore Umbilical for Deep Water Dynamic Service". W Offshore Technology Conference. Offshore Technology Conference, 2009. http://dx.doi.org/10.4043/19784-ms.

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Roffe, A., M. Morgan-Hague, M. Waiblinger, G. Sanuk, M. Joschko, M. Kesting, T. Birkner i in. "New Mechanical Roughening Processes as Surface Preparation of Engine Cylinder Bores Before Thermal Spraying". W ITSC2017, redaktorzy A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen i C. A. Widener. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0221.

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Abstract Several surface preparation techniques are being used like grit blasting, HP water jet roughening as well as mechanical roughening for the preparation of Aluminum cylinder bore surfaces before a thermal spraying can be applied. However, in case of spray-repaired CI cast iron engine blocks the conventional mechanical roughening processes - using cutting inserts with small dovetail-undercut geometry - are not applicable due to the high hardness and high material toughness. Therefore such CI engine blocks are bored oversize in order to remove the bore wear damage and subsequently this rough-machined surface is coated by a NiAl-bond coating material in order to provide sufficient bond strength for the functional top coating material. In this paper it will be demonstrated that the 2-step spray-repair process can be replaced by a single-step process by using a new diamond-roll-roughening method. This process leads to significant higher bond strength values than the conventional process, including the bond coating material. PAT Adhesion test results as well as microstructural cross sections of coated cylinder bores will be presented. The principle of the roll-roughening process is outlined. In addition it will be shown that different mechanical roughening methods can be combined to obtain high bond strength values for spray-repaired aluminum blocks which require a higher coating thickness to compensate for the depth of the original mechanical bore activation.
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Raporty organizacyjne na temat "Bore water"

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Simms, Janet, Benjamin Breland i William Doll. Geophysical investigation to assess condition of grouted scour hole : Old River Control Complex—Low Sill Concordia Parish, Louisiana. Engineer Research and Development Center (U.S.), wrzesień 2021. http://dx.doi.org/10.21079/11681/41863.

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Geophysical surveys, both land-based and water-borne, were conducted at the Old River Control Complex‒Low Sill, Concordia Parish, LA. The purpose of the surveys was to assess the condition of the grout within the scour region resulting from the 1973 flood event, including identification of potential voids within the grout. Information from the ground studies will also be used for calibration of subsequent marine geophysical data and used in stability analysis studies. The water-borne survey consisted of towed low frequency (16-80 MHz) ground penetrating radar (GPR), whereas the land-based surveys used electrical resistivity and seismic refraction. The GPR survey was conducted in the Old River Channel on the upstream side of the Low Sill structure. The high electrical conductivity of the water (~50 mS/m) precluded penetration of the GPR signal; thus, no useful data were obtained. The land-based surveys were performed on both northeast and southeast sides of the Low Sill structure. Both resistivity and seismic surveys identify a layered subsurface stratigraphy that corresponds, in general, with available borehole data and constructed geologic profiles. In addition, an anomalous area on the southeast side was identified that warrants future investigation and monitoring.
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Lapizco-Encinas, Blanca Hazalia, Gregory J. Fiechtner, Eric B. Cummings, Rafael V. Davalos, Michael P. Kanouff, Blake Alexander Simmons, Gregory J. McGraw, Allen J. Salmi, Joseph T. Ceremuga i Yolanda Fintschenko. Separation and concentration of water-borne contaminants utilizing insulator-based dielectrophoresis. Office of Scientific and Technical Information (OSTI), styczeń 2006. http://dx.doi.org/10.2172/878575.

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Richardson, Jeremy, Eric Dixon i Ted Boettner. Repairing the damage: cleaning up hazardous coal ash can create jobs and improve the environment. Union of Concerned Scientists, październik 2021. http://dx.doi.org/10.47923/2021.12306.

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Although coal has powered the nation for generations and today offers well-paying jobs—often the best opportunities in more rural areas—coal negatively affects human health and the environment at every point in its life cycle: when it is mined, processed, transported, burned, and discarded (Freese, Clemmer, and Nogee 2008). Local communities— often low-income communities and/or communities of color—have for decades borne the brunt of these negative impacts, including air pollution, water pollution, and work- place injuries, illnesses, and fatalities.
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Richardson, Jeremy, Eric Dixon i Ted Boettner. Repairing the damage: cleaning up hazardous coal ash can create jobs and improve the environment. Union of Concerned Scientists, październik 2021. http://dx.doi.org/10.47923/2021.14314.

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Although coal has powered the nation for generations and today offers well-paying jobs—often the best opportunities in more rural areas—coal negatively affects human health and the environment at every point in its life cycle: when it is mined, processed, transported, burned, and discarded (Freese, Clemmer, and Nogee 2008). Local communities— often low-income communities and/or communities of color—have for decades borne the brunt of these negative impacts, including air pollution, water pollution, and work- place injuries, illnesses, and fatalities.
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O'Sullivan, Vincent, i Brian C. O'Connell. Water Fluoridation, Oral Status and Bone Health of Older People in Ireland. The Irish Longitudinal Study on Ageing, luty 2015. http://dx.doi.org/10.38018/tildarb.2015-00.

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Ferrie, Joseph, Karen Rolf i Werner Troesken. Cognitive Disparities, Lead Plumbing, and Water Chemistry: Intelligence Test Scores and Exposure to Water-Borne Lead Among World War Two U.S. Army Enlistees. Cambridge, MA: National Bureau of Economic Research, czerwiec 2011. http://dx.doi.org/10.3386/w17161.

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Wayne, David Matthew, i Joel C. Rowland. Plutonium Oxide Containment and the Potential for Water-Borne Transport as a Consequence of ARIES Oxide Processing Operations. Office of Scientific and Technical Information (OSTI), luty 2015. http://dx.doi.org/10.2172/1169147.

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Johansen, Richard A., Christina L. Saltus, Molly K. Reif i Kaytee L. Pokrzywinski. A Review of Empirical Algorithms for the Detection and Quantification of Harmful Algal Blooms Using Satellite-Borne Remote Sensing. U.S. Army Engineer Research and Development Center, czerwiec 2022. http://dx.doi.org/10.21079/11681/44523.

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Harmful Algal Blooms (HABs) continue to be a global concern, especially since predicting bloom events including the intensity, extent, and geographic location, remain difficult. However, remote sensing platforms are useful tools for monitoring HABs across space and time. The main objective of this review was to explore the scientific literature to develop a near-comprehensive list of spectrally derived empirical algorithms for satellite imagers commonly utilized for the detection and quantification HABs and water quality indicators. This review identified the 29 WorldView-2 MSI algorithms, 25 Sentinel-2 MSI algorithms, 32 Landsat-8 OLI algorithms, 9 MODIS algorithms, and 64 MERIS/Sentinel-3 OLCI algorithms. This review also revealed most empirical-based algorithms fell into one of the following general formulas: two-band difference algorithm (2BDA), three-band difference algorithm (3BDA), normalized-difference chlorophyll index (NDCI), or the cyanobacterial index (CI). New empirical algorithm development appears to be constrained, at least in part, due to the limited number of HAB-associated spectral features detectable in currently operational imagers. However, these algorithms provide a foundation for future algorithm development as new sensors, technologies, and platforms emerge.
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Sela, Shlomo, i Michael McClelland. Desiccation Tolerance in Salmonella and its Implications. United States Department of Agriculture, maj 2013. http://dx.doi.org/10.32747/2013.7594389.bard.

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Salmonella enterica is a worldwide food-borne pathogen, which regularly causes large outbreaks of food poisoning. Recent outbreaks linked to consumption of contaminated foods with low water-activity, have raised interest in understanding the factors that control fitness of this pathogen to dry environment. Consequently, the general objective of this study was to extend our knowledge on desiccation tolerance and long-term persistence of Salmonella. We discovered that dehydrated STm entered into a viable-but-nonculturable state, and that addition of chloramphenicol reduced bacterial survival. This finding implied that adaptation to desiccation stress requires de-novo protein synthesis. We also discovered that dried STm cells develop cross-tolerance to multiple stresses that the pathogen might encounter in the agriculture/food environment, such as high or low temperatures, salt, and various disinfectants. These findings have important implications for food safety because they demonstrate the limitations of chemical and physical treatments currently utilized by the food industry to completely inactivate Salmonella. In order to identify genes involved in desiccation stress tolerance, we employed transcriptomic analysis of dehydrated and wet cells and direct screening of knock-out mutant and transposon libraries. Transcriptomic analysis revealed that dehydration induced expression of ninety genes and down-regulated seven. Ribosomal structural genes represented the most abundant functional group with a relatively higher transcription during dehydration. Other large classes of induced functional groups included genes involved in amino acid metabolism, energy production, ion transport, transcription, and stress response. Initial genetic analysis of a number of up-regulated genes was carried out). It was found that mutations in rpoS, yahO, aceA, nifU, rpoE, ddg,fnr and kdpE significantly compromised desiccation tolerance, supporting their role in desiccation stress response.
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Crystal, Victoria, Justin Tweet i Vincent Santucci. Yucca House National Monument: Paleontological resource inventory (public version). National Park Service, maj 2022. http://dx.doi.org/10.36967/nrr-2293617.

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Yucca House National Monument (YUHO) in southwestern Colorado protects unexcavated archeological structures that were constructed by the Ancestral Puebloan people between 1050 and 1300 CE. It was established by Woodrow Wilson by presidential proclamation in 1919 and named “Yucca House” by archeologist Jesse Fewkes as a reference to the names used for this area by the local Ute, Tewa Pueblo, and other Native groups. It was originally only 3.9 ha (9.6 ac) of land, but in 1990, an additional 9.7 ha (24 ac) of land was donated by Hallie Ismay, allowing for the protection of additional archeological resources. Another acquisition of new land is currently underway, which will allow for the protection of even more archeological sites. The archeological resources at YUHO remain unexcavated to preserve the integrity of the structures and provide opportunities for future generations of scientists. One of the factors that contributed to the Ancestral Puebloans settling in the area was the presence of natural springs. These springs likely provided enough water to sustain the population, and the Ancestral Puebloans built structures around one of the larger springs, Aztec Spring. Yet, geologic features and processes were shaping the area of southwest Colorado long before the Ancestral Puebloans constructed their dwellings. The geologic history of YUHO spans millions of years. The oldest geologic unit exposed in the monument is the Late Cretaceous Juana Lopez Member of the Mancos Shale. During the deposition of the Mancos Shale, southwestern Colorado was at the bottom of an inland seaway. Beginning about 100 million years ago, sea level rose and flooded the interior of North America, creating the Western Interior Seaway, which hosted a thriving marine ecosystem. The fossiliferous Juana Lopez Member preserves this marine environment, including the organisms that inhabited it. The Juana Lopez Member has yielded a variety of marine fossils, including clams, oysters, ammonites, and vertebrates from within YUHO and the surrounding area. There are four species of fossil bivalves (the group including clams and oysters) found within YUHO: Cameleolopha lugubris, Inoceramus dimidius, Inoceramus perplexus, and Pycnodonte sp. or Rhynchostreon sp. There are six species of ammonites in three genera found within YUHO: Baculites undulatus, Baculites yokoyamai, Prionocyclus novimexicanus, Prionocyclus wyomingensis, Scaphites warreni, and Scaphites whitfieldi. There is one unidentifiable vertebrate bone that has been found in YUHO. Fossils within YUHO were first noticed in 1875–1876 by W. H. Holmes, who observed fossils within the building stones of the Ancestral Puebloans’ structures. Nearly half of the building stones in the archeological structures at YUHO are fossiliferous slabs of the Juana Lopez Member. There are outcrops of the Juana Lopez 0.8 km (0.5 mi) to the west of the structures, and it is hypothesized that the Ancestral Puebloans collected the building stones from these or other nearby outcrops. Following the initial observation of fossils, very little paleontology work has been done in the monument. There has only been one study focused on the paleontology and geology of YUHO, which was prepared by paleontologist Mary Griffitts in 2001. As such, this paleontological resource inventory report serves to provide information to YUHO staff for use in formulating management activities and procedures associated with the paleontological resources. In 2021, a paleontological survey of YUHO was conducted to revisit previously known fossiliferous sites, document new fossil localities, and assess collections of YUHO fossils housed at the Mesa Verde National Park Visitor and Research Center. Notable discoveries made during this survey include: several fossils of Cameleolopha lugubris, which had not previously been found within YUHO; and a fossil of Pycnodonte sp. or Rhynchostreon sp. that was previously unknown from within YUHO.
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