Log in

Relevant bibliographies by topics / Controlled and field conditions

Academic literature on the topic 'Controlled and field conditions'

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Controlled and field conditions.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Controlled and field conditions"

1

Chang, Jer-Chia, and Tzong-Shyan Lin. "Gas exchange in litchi under controlled and field conditions." Scientia Horticulturae 114, no. 4 (November 2007): 268–74. http://dx.doi.org/10.1016/j.scienta.2007.06.023.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Orlowska, Marta, Michel Havet, and Alain Le-Bail. "Controlled ice nucleation under high voltage DC electrostatic field conditions." Food Research International 42, no. 7 (August 2009): 879–84. http://dx.doi.org/10.1016/j.foodres.2009.03.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Rachenko, M. A., E. N. Kiseleva, A. M. Rachenko, and A. A. Kuznetsov. "Winter hardiness of remontant raspberry under field and controlled conditions." IOP Conference Series: Earth and Environmental Science 1112, no. 1 (December 1, 2022): 012100. http://dx.doi.org/10.1088/1755-1315/1112/1/012100.

Full text

Abstract:

Abstract The development of fruit farming, an important branch of agriculture, is impossible without the introduction of new crops and new varieties. Replanted raspberries are a new crop for Siberia. Increased interest in it is determined by its biochemical composition, high productivity, and long fruit-bearing. Large-fruited varieties of European selection of summer fruiting do not always winter in the best way. We were interested in the possibility of expanding the potential of the studied varieties of remontant raspberry in the conditions of the Siberian climate, using it not only in an annual mowed crop but also to find out how realistic it is to get a yield from two-year shoots of remontant raspberry. For this purpose, the winter hardiness of floricans of remontant raspberry varieties was characterized. The most frost-resistant remontant raspberry varieties were identified according to the results of research. Critical negative temperature for all studied varieties and forms of remontant raspberry was determined.

APA, Harvard, Vancouver, ISO, and other styles

4

Arnold, Susan F., Yuan Shao, and Gurumurthy Ramachandran. "Evaluating well-mixed room and near-field–far-field model performance under highly controlled conditions." Journal of Occupational and Environmental Hygiene 14, no. 6 (May 5, 2017): 427–37. http://dx.doi.org/10.1080/15459624.2017.1285492.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Barbetti, MJ, and PGH Nichols. "Susceptibility of subterranean clover varieties to rust under controlled environment and field conditions." Australian Journal of Experimental Agriculture 31, no. 1 (1991): 77. http://dx.doi.org/10.1071/ea9910077.

Full text

Abstract:

Thirty-two subterranean clover varieties, comprising 17 commercial cultivars, 1 named variety and 14 promising midseason breeding and introduced lines, were screened for resistance to rust (caused by Uromyces trifolii-repentis) under controlled environment conditions, and where possible, comparisons were made with their performance in field plots. There were large differences between varieties in the incidence and severity of rust on plants. Under controlled environment conditions, cvv. Gingin, Meteora and Enfield, and to a lesser extent Larisa and Trikkala, had the lowest levels of rust leaf infection, the lowest rust pustule densities and the smallest rust pustules. Seaton Park had a relatively low pustule density and CPI 89830F had relatively small pustules. Gingin and Enfield had the least leaf collapse. Green Range was the most susceptible under controlled environment conditions, followed by Bacchus Marsh, Karridale, CPI 47308C and CPI 89841E. Under field conditions, Enfield, Meteora, Trikkala and CPI 89822H were rust free, while Larisa, CPI 47308C, CPI 65328F, 75S13-12, 76841-1, CPI 89830F and CPI 89880J had good resistance. Green Range was clearly the most susceptible under field conditions, followed by Seaton Park, Karridale, Bacchus Marsh, CPI 89774F and CPI 89841E. While there was often good correlation between the field and controlled environment data for the different parameters, the resistance rankings of some varieties varied widely, depending upon whether screened under controlled environment or field conditions. Green Range, Karridale, Seaton Park and CPI 89841E were highly susceptible to rust under both controlled and field conditions, indicating that either environment could be successfully used to identify highly susceptible varieties. The high degree of resistance observed in Enfield, Gingin and Meteora, and to a lesser extent in Larisa and Trikkala, suggests their value as parents in breeding programs for rust resistance.

APA, Harvard, Vancouver, ISO, and other styles

6

Sarkar, Biswajit, and Sirshendu De. "Electric field enhanced gel controlled cross-flow ultrafiltration under turbulent flow conditions." Separation and Purification Technology 74, no. 1 (July 30, 2010): 73–82. http://dx.doi.org/10.1016/j.seppur.2010.05.009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Monteiro, José Eduardo B. A., Paulo C. Sentelhas, Mark L. Gleason, Paul D. Esker, and Ederaldo J. Chiavegato. "Development of Ramulosis Disease of Cotton Under Controlled Environment and Field Conditions." Phytopathology® 99, no. 6 (June 2009): 659–65. http://dx.doi.org/10.1094/phyto-99-6-0659.

Full text

Abstract:

Colletotrichum gossypii var. cephalosporioides, the fungus that causes ramulosis disease of cotton, is widespread in Brazil and can cause severe yield loss. Because weather conditions greatly affect disease development, the objective of this work was to develop weather-based models to assess disease favorability. Latent period, incidence, and severity of ramulosis symptoms were evaluated in controlled environment experiments using factorial combinations of temperature (15, 20, 25, 30, and 35°C) and leaf wetness duration (0, 4, 8, 16, 32, and 64 h after inoculation). Severity was modeled as an exponential function of leaf wetness duration and temperature. At the optimum temperature of disease development, 27°C, average latent period was 10 days. Maximum ramulosis severity occurred from 20 to 30°C, with sharp decreases at lower and higher temperatures. Ramulosis severity increased as wetness periods were increased from 4 to 32 h. In field experiments at Piracicaba, São Paulo State, Brazil, cotton plots were inoculated (105 conidia ml–1) and ramulosis severity was evaluated weekly. The model obtained from the controlled environment study was used to generate a disease favorability index for comparison with disease progress rate in the field. Hourly measurements of solar radiation, temperature, relative humidity, leaf wetness duration, rainfall, and wind speed were also evaluated as possible explanatory variables. Both the disease favorability model and a model based on rainfall explained ramulosis growth rate well, with R2 of 0.89 and 0.91, respectively. They are proposed as models of ramulosis development rate on cotton in Brazil, and weather–disease relationships revealed by this work can form the basis of a warning system for ramulosis development.

APA, Harvard, Vancouver, ISO, and other styles

8

Wang, Xiaoping, Michael P. Dossett, Milton P. Gordon, and Stuart E. Strand. "Fate of Carbon Tetrachloride during Phytoremediation with Poplar under Controlled Field Conditions." Environmental Science & Technology 38, no. 21 (November 2004): 5744–49. http://dx.doi.org/10.1021/es0499187.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Ortiz-Ferrara, G., M. G. Mosaad, V. Mahalakshmi, and R. A. Fischer. "Photoperiod and vernalization response of wheat under controlled environment and field conditions." Plant Breeding 114, no. 6 (December 1995): 505–9. http://dx.doi.org/10.1111/j.1439-0523.1995.tb00845.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Frank, A. B., R. E. Barker, and J. D. Berdahl. "Water‐Use Efficiency of Grasses Grown under Controlled and Field Conditions 1." Agronomy Journal 79, no. 3 (May 1987): 541–44. http://dx.doi.org/10.2134/agronj1987.00021962007900030028x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Controlled and field conditions"

1

Al, Masri Ali [Verfasser]. "Application of proximal sensing techniques for epidemiological investigations of Fusarium head blight in wheat under field and controlled conditions / Ali Al Masri." Bonn : Universitäts- und Landesbibliothek Bonn, 2018. http://d-nb.info/1155922778/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Beckers, Felix [Verfasser]. "Mobilization, Methylation, and Ethylation of Mercury in Contaminated Floodplain Soils under Controlled Laboratory Redox Conditions as Influenced by Potential Immobilizing Agents as well as Mobilization of Mercury under Field Conditions / Felix Beckers." Wuppertal : Universitätsbibliothek Wuppertal, 2019. http://d-nb.info/1206122870/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Bredemeier, Christian [Verfasser]. "Laser-induced chlorophyll fluorescence sensing as a tool for site-specific nitrogen fertilization – evaluation under controlled environmental and field conditions in wheat and maize / Christian Bredemeier." Aachen : Shaker, 2005. http://d-nb.info/1181614112/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Neu, Silke [Verfasser], E. Gert [Gutachter] Dudel, Karl-Heinz [Gutachter] Feger, and Hermann [Gutachter] Heilmeier. "Assessment of gentle remediation options for trace element-contaminated agricultural land under semi-controlled and field conditions / Silke Neu ; Gutachter: E. Gert Dudel, Karl-Heinz Feger, Hermann Heilmeier." Dresden : Technische Universität Dresden, 2020. http://d-nb.info/1231917504/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Danielsen, Lara [Verfasser], Andrea [Akademischer Betreuer] Polle, and Stefan [Akademischer Betreuer] Scheu. "Fungal diversity in a transgenic poplar plantation and the role of ectomycorrhizal fungi for tree performance under field and controlled drought stress conditions / Lara Danielsen. Gutachter: Andrea Polle ; Stefan Scheu. Betreuer: Andrea Polle." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2013. http://d-nb.info/1044361697/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Lopisso, Daniel Teshome Verfasser], Andreas von [Akademischer Betreuer] Tiedemann, Petr [Gutachter] Karlovsky, and Heiko [Gutachter] [Becker. "Studies on Resistance of Oilseed Rape (Brassica napus) to Verticillium longisporum – Interaction with Drought Stress, Role of Xylem Sap Modulations and Phenotyping Under Controlled and Field Conditions / Daniel Teshome Lopisso ; Gutachter: Petr Karlovsky, Heiko C. Becker ; Betreuer: Andreas von Tiedemann." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1120701996/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Song, Haiwen. "Diesel soot oxidation under controlled conditions." Thesis, Brunel University, 2003. http://bura.brunel.ac.uk/handle/2438/4814.

Full text

Abstract:

In order to improve understanding of diesel soot oxidation, an experimental rig was designed and set up, in which the soot oxidation conditions, such as temperature, oxygen partial pressure, and CO2 partial pressure, could be varied independently of each other. The oxidizing gas flow in the oxidizer was under laminar condition. This test rig comprised a naturally-aspirated single cylinder engine which acted as the soot generator, and a separate premixed oxidation burner system in which soot extracted from the engine was oxidized under controlled conditions. Diesel soot was extracted from the engine exhaust pipe and from the engine pre-combustion chamber, and the soot-laden gas was then conveyed to the burner where it was oxidized. The burner was positioned vertically and it had a flat flame whose thickness was only a few millimetres. The hot gases from the flame flew upwards through a quartz transparent tube which acted as the soot oxidation duct. The soot-laden gas from the engine was premixed with the feedgas (itself a premixed mixture of methane, air, oxygen, and nitrogen) to the burner. The soot particles passed vertically through the flame front and continued burning in the post-flame gas flowing through the quartz tube oxidation duct. The oxygen concentration and temperature of the post-flame soot oxidation gas were controllable by adjusting the flowrate and composition of the burner feedgas. Diesel soot particles were sampled at different heights along the centreline of the quartz tube above the burner. Profiles of oxygen concentration, temperature, and soot particle velocity in the oxidation zone were thus measured. Morphology and size distributions of the sampled diesel soot particles were analyzed by means of Transmission Electron Microscopy (TEM) and a computer software called ImagePro Plus. Subsequently, the specific surface oxidation rates of the soot particles were worked out based on soot particle size distributions. The TEM micrographs obtained in this study showed that the diesel soot agglomerates existed in forms of clusters and chains, each containing between a small number and thousands of individual, mostly spherical tiny particles. Of order 97% of the individual spherical particles (spherules) had a size range from 10 to 80 nm. Occasionally, individual spherules of about 150 nm in diameter could be observed. The diesel soot particles sampled from the pre-chamber of the engine had different size distributions from those sampled from the exhaust of the engine, indicating that the soot underwent an oxidation process in the combustion chamber. Soot oxidation experiments were performed in the burner post-flame gas under oxygen partial pressures ranging from 0.010 to 0.050 atm and temperatures from 1520 to 1820 K. The test results showed that the oxidation rates of the diesel soot extracted from the diesel engine were generally lower than those predicted by the well-known Nagle and Strickland-Constable formula; however, the measured oxidation rates were higher than the predictions made with another well-known formula - the Lee formula. The soot extracted from the engine pre-chamber appeared not to oxidize as fast as the soot extracted from the exhaust of the engine. CO2 gas injection to the post-flame oxidation gas at constant oxygen partial pressure and oxidation temperature seemed to have accelerated the diesel soot oxidation rate. Based on the experimental results of this study and the results of other researchers, modifications to the Nagle and Strickland-Constable formula and to the Lee formula were accomplished. Also, an empirical expression, as an alternative to semi-empirical formulae, was worked out and presented in the thesis.

APA, Harvard, Vancouver, ISO, and other styles

8

Thomas, Sophie. "Pressions de sélection exercées par les résistances génétiques du melon sur les populations d’Aphis gossypii." Thesis, Avignon, 2011. http://www.theses.fr/2011AVIG0637/document.

Full text

Abstract:

La réponse adaptative de populations de bioagresseurs aux pressions de sélection exercées par les activités agricoles détermine la durabilité des moyens de lutte. Chez le melon, le gène Vat qui confère la résistance à Aphis gossypii étant déployé depuis plus de 10 ans, on craint son contournement. L’enjeu est de proposer des éléments stratégiques aux semenciers sur le risque d’évolution des pucerons vers la virulence, pour développer de nouvelles variétés avec des résistances durables. Dans le cadre de cette thèse, nous avons : i) Estimé la diversité génétique disponible dans des populations d’A. gossypii de différentes régions de production de melon. Elle est structurée géographiquement. La grande diversité observée en France aurait en partie pour origine des évènements de reproduction sexuée suggérant un potentiel évolutif élevé d’A. gossypii. ii) Estimé la pression de sélection exercée par différentes combinaisons de résistance (gène Vat et QTL) sur ces populations. Les densités de population sont plus faibles sur les plantes Vat que sur les plantes non Vat et la structure génétique des populations est modifiée dans certaines régions de production quand le gène Vat est présent. Les clones se multipliant sur les plantes Vat ont une forte fitness et le risque de leurs extensions est grand. Aucun effet de QTL de résistance n’a été mis en évidence en plein champ. iii) Caractérisé les clones contournant le gène Vat. Nos résultats suggèrent que l’adaptation des clones s’effectue soit par modification du gène d’avirulence du puceron soit par l’adaptation du puceron aux effecteurs de la résistance. De nouvelles stratégies de gestion de la résistance Vat sont proposées
The adaptive response of pest populations to selection pressures exerted by agricultural activities determines the sustainability of control methods. In melon, the Vat gene that confers resistance to Aphis gossypii has been deployed for over 10 years, so there are fears it will be overcome. The challenge is to provide strategic elements to plant breeders, concerning the risk of development of virulent aphids, in order to develop new varieties with durable resistances. In the context of this PhD, we have : i) Estimated the available genetic diversity in populations of A. gossypii from different melongrowing areas. The diversity is structured geographically. The great diversity observed in France would have its origine in part from the events of sexual reproduction, suggesting a high evolutionary potential of A. gossypii. ii) Estimated the selection pressure exerted by different resistance combinations (Vat gene and QTLs) on these populations. Population densities are lower on VatR plants than VatS plants and population genetic structure is altered in certain growing areas when the VatR gene is present. The clones multiplying on VatR plants have good fitness and the risk of their spreading is great. No effect of QTLs has been identified in the field. iii) Characterized the clones overcoming the VatR gene. Our results suggest that the adaptation of clones made either by alteration of the avirulence gene of aphids or by adaptation of aphids toresistance effectors. New strategies for Vat resistance management are proposed

APA, Harvard, Vancouver, ISO, and other styles

9

Hackston, Abigail Jane. "Activation of faulting under controlled stress conditions." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/activation-of-faulting-under-controlled-stress-conditions(2eb0b3f9-33c4-43d3-bbf2-490744f94d23).html.

Full text

Abstract:

In 1951, it was first suggested by E.M. Anderson that faults in nature will form at specific angles to the maximum principal stress. For most cases, this concept agrees with observations. However, in nature there are some notable exceptions to this rule, with some faults becoming activated in unfavourable orientations. This project was designed to examine conditions that might affect the angle of faulting and the friction coefficient for sliding. Faults that do not conform to generally accepted ‘Andersonian’ theory include low-angle detachment faults (e.g. Basin and Range Province (USA)), the San Andreas Fault (USA) the Nordfjord Sojn Detachment (Norway), high angle (steeply dipping) normal faults (Britain) and the Zuccale Fault, Italy. Various explanations have been given for sliding on these unfavourably-oriented faults, including high pressure CO2 or water infiltration (Zuccale Fault), low-friction minerals growing in fault gouge (Zuccale fault, San Andreas Fault), stress refraction (San Andreas Fault), reactivation of thrust faults (Nordfjord Sojn Detachment) and fracture under a combination of compression and tension (UK).Experiments were performed in compression and extension using a triaxial deformation rig. Darley Dale sandstone and Pennant sandstone blocks were cut into cores and tested under the following conditions: (a) intact rock failure (dry); (b) sawcut at 35°, 45° and 55° (dry) to the core axis using (i) constant confining pressure, (ii) constant normal stress (iii) constant mean stress; (c) with pore pressure in all three sawcut angles; and (d) with a gouge layer of 70% quartz to 30% kaolinite mixed with 0, 2, 5, 10, 20, 50 and 100% wt of either graphite or talc. Microstructural studies were carried out on deformed samples. These experiments showed that: The angle of failure in extension was 16-20° to the maximum principal stress for Darley Dale sandstone, and 18-21° for Pennant sandstone whereas in compression it was >30°. This angle in extension is lower than expected, but microstructural analysis indicated occurrence of stress refraction, which may help explain this result. The friction coefficient does not appear to change with pre-cut fault angle in dry samples. Pore pressure tests confirmed the general applicability of the law of effective stress, but anomalous apparent reduction of friction coefficient and production of an apparent cohesive strength in pore pressure tests suggested tests should be run slower to avoid disparity between applied pore pressure and true pore pressure in the sample. Attempts to induce hydraulic fractures showed that high overpressures may often be required to do this. Addition of a low-friction phase (talc or graphite) to fault gouge reduced friction by a disproportionately large amount for very planar faults. This was shown to be due to mechanical smearing of the weak phase over the fault plane, increasing its apparent area of coverage. It was concluded that commonly some combination of high fluid pressure in fault planes coupled with low-friction fault gouges may be required to explain slip on natural, unfavourably –oriented faults.

APA, Harvard, Vancouver, ISO, and other styles

10

Cumbria, Neil M. "Robust controlled flux estimation for indirect field-oriented controlled induction motor drives." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0023/MQ31386.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Controlled and field conditions"

1

Rehm, Ronald G. Diffusion-controlled reaction in a vortex field. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, Center for Applied Mathematics and Center for Fire Research, 1987.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Rehm, Ronald G. Diffusion-controlled reaction in a vortex field. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, Center for Applied Mathematics and Center for Fire Research, 1987.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

Edney, Edward. Paint coatings: Controlled field and chamber experiments. Research Triangle Park, NC: U.S. Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory, 1989.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Rehm, Ronald G. Diffusion-controlled reaction in a vortex field. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, Center for Applied Mathematics and Center for Fire Research, 1987.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

5

Edney, Edward. Paint coatings: Controlled field and chamber experiments. Research Triangle Park, NC: U.S. Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory, 1989.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

6

Rehm, Ronald G. Diffusion-controlled reaction in a vortex field. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, Center for Applied Mathematics and Center for Fire Research, 1987.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

7

Rehm, Ronald G. Diffusion-controlled reaction in a vortex field. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, Center for Applied Mathematics and Center for Fire Research, 1987.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

8

Truong, Yen Thi Hoang. Reduction of selenite under controlled conditions. Sudbury, Ont: Laurentian University, School of Graduate Studies, 2005.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

9

Huff, Sam. Controlled violence: On the field and in the booth. Chicago, Ill: Triumph Books, 2011.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

10

Wikström, Mats Olaf Tobias. MOS-controlled switches for high-voltage application. Konstanz: Hartung-Gorre, 2001.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "Controlled and field conditions"

1

Mayer, V., K. J. Sandmeier, and H. Wilhelm. "Monitoring Dnapl Pools Under Controlled Conditions Using GPR." In Field Screening Europe, 133–36. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-1473-5_31.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Delory, Benjamin M., Emanuela W. A. Weidlich, Richard van Duijnen, Loïc Pagès, and Vicky M. Temperton. "Measuring Plant Root Traits Under Controlled and Field Conditions: Step-by-Step Procedures." In Methods in Molecular Biology, 3–22. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-7747-5_1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Langeveld, C. A., P. A. Leffelaar, and J. Goudriaan. "Factors Affecting Nitrous Oxide Emission from a Sandy Grassland Soil under Controlled Field Conditions." In Progress in Nitrogen Cycling Studies, 575–79. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-5450-5_94.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Ohta, Takehiro, Yuka Kubo, Chihiro Kawakami, and Kento Narita. "Groundwater chemistry controlled by geologic conditions at Yotei Volcano, Hokkaido, Northern Japan." In Rock Mechanics and Engineering Geology in Volcanic Fields, 324–32. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003293590-42.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Chen, Junkai, Wenxue Gao, Xiangjun Hao, Zheng Wei, Xiaojun Zhang, and Zhaochen Liu. "Multilateral Boundary Blasting Theory of High and Steep Slope in Open Pit Mine and Its Application." In Lecture Notes in Civil Engineering, 347–57. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_32.

Full text

Abstract:

AbstractAt present, the blasting theory of high and steep rock slope mainly focuses on flat terrain, ignoring the influence of micro-terrain boundary factors on blasting effect, which leads to excessive blasting energy and affects the stability of slope. Therefore, based on the theory of multilateral boundary rock blasting, this paper deduces the calculation formula of blasting charge for high and steep rock slope under multilateral boundary conditions, and verifies it with field test. The results show that: (1) The multilateral boundary charge calculation formula directly includes micro-topography boundary conditions and blasting effect, and the rock blasting theory is based on the interaction of blasting energy provided by explosives and potential energy in medium, which effectively improves the energy utilization rate of explosives. (2) The influence of surplus blasting energy on the surrounding environment under different boundary conditions is controlled, and the explosive explosion effect is effectively controlled, so that a stable high and steep slope of open pit mine is formed after blasting.

APA, Harvard, Vancouver, ISO, and other styles

6

Chakma, Nidhi, Moutoshi Chakraborty, Salma Bhyan, and Mobashwer Alam. "Molecular breeding for combating salinity stress in sorghum: progress and prospects." In Molecular breeding in wheat, maize and sorghum: strategies for improving abiotic stress tolerance and yield, 421–32. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789245431.0024.

Full text

Abstract:

Abstract This chapter discusses current progress and prospects of molecular breeding and strategies for developing better saline-tolerant sorghum (Sorghum bicolor) varieties. Most molecular breeding techniques for salt tolerance have been carried out in controlled environments where the plants were not exposed to any variation of the surrounding environment, producing reliable results. Due to the polygenic nature of salt tolerance, the identified quantitative trait loci (QTLs) could be false QTLs. Therefore, QTL validation is important in different plant populations and field conditions. Subsequently, marker validation is important before utilizing marker-assisted selection for screening salt-tolerant plants. Combining molecular breeding with conventional breeding can hasten the development of salt-tolerant sorghum varieties.

APA, Harvard, Vancouver, ISO, and other styles

7

Villar, Rafael, Paloma Ruiz-Benito, Enrique G. de la Riva, Hendrik Poorter, Johannes H. C. Cornelissen, and José Luis Quero. "Growth and Growth-Related Traits for a Range of Quercus Species Grown as Seedlings Under Controlled Conditions and for Adult Plants from the Field." In Tree Physiology, 393–417. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69099-5_12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Geras'kin, Stanislav, Roman Churyukin, Polina Volkova, and Sofiya Bitarishvili. "Using ionizing radiation for improving the development and yield of agricultural crops." In Mutation breeding, genetic diversity and crop adaptation to climate change, 424–32. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789249095.0043.

Full text

Abstract:

Abstract The response of barley seedlings was studied after gamma irradiation of seeds with doses in the range of 2-50 Gy. It was shown that stimulation of plant growth occurred in the dose range of 16-20 Gy. The influences of the dose rate, the quality of seeds and their moisture on the manifestation of radiation effects were investigated. We studied, under controlled conditions, the activities of metabolic and antioxidant enzymes and observed an increase in their activity in the range of doses that cause stimulation of seedling growth. We showed that changes in the balance among different classes of phytohormones were probably involved in the acceleration of plant growth after irradiation of seeds using stimulating doses. Gamma irradiation of barley seeds significantly influenced the development of plants during the growing season. After irradiation with stimulating doses, we observed a reduction in the duration of the initial stages of ontogenesis; the phase of full ripeness occurred 5-7 days earlier than in the controls. The manifestation of the effect of irradiation depended on the conditions in which the plants developed. During the growing season of 2014, which was a dry year, plants originating from the irradiated seeds showed an increase in the number of productive stems, which led to an increase in yield by 34-38%; during the optimal 2015 season, an increase in the number of grains per spike caused an increase in yield by 8-29%. Therefore, our field study has shown that at least some hormetic effects can occur in the field. Irradiation of seeds can increase field germination, stimulate the growth and development of plants and increase their resistance to unfavourable environmental conditions. A more complete understanding of the underlying mechanisms of hormesis is needed to exploit its potential benefits in crop production.

APA, Harvard, Vancouver, ISO, and other styles

9

Handley, G., and P. Wilkins. "Coursework under controlled conditions." In English coursework, 80–83. London: Macmillan Education UK, 1991. http://dx.doi.org/10.1007/978-1-349-13026-9_14.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Singh, Ranbir, and B. Jayant Baliga. "Asymmetric Field Controlled Thyristors." In Cryogenic Operation of Silicon Power Devices, 105–15. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5751-7_9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Controlled and field conditions"

1

Tong, Ben, Yang Qingxin, Yan Rongge, and Zhu Lihua. "Magnetically controlled saturable reactor core vibration under practical working conditions." In 2016 IEEE Conference on Electromagnetic Field Computation (CEFC). IEEE, 2016. http://dx.doi.org/10.1109/cefc.2016.7816333.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Badillo, Arnoldo A. "Phase-Field Simulations of Bubble Growth Under Convective Conditions." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65925.

Full text

Abstract:

Although many years have past from the pioneer work of Lord Rayleigh [1] on bubble growth in the inertia controlled regime and later from Scriven [2], Plesset and Zwick [3] for the diffusion controlled regime, we are still missing mathematical model able to predict accurately both situations. Advances in computational power open the possibility of exploring up-close the transport phenomena in the vicinity of the liquid-vapor interface at an unprecedented resolution. Nonetheless, a high numerical resolution is not enough to fully solve the general problem of bubble growth. New models based on a sharp-interface interpretation of the liquid-vapor interface, have proven to provide accurate results in the diffusion controlled regime, however, these models must assume the interface temperature at the saturation value, restricting their application to physical situations where the evaporation rate satisfies the Stefan condition and bubbles are big enough as to neglect the curvature effects in the interface temperature. In an attempt to provide a more general framework to study bubble growth, a new phase-field model has recently been derived, where no assumption is made on the interface temperature. In this new model, the evaporation rate depends on the local interface temperature and not directly on the heat balance at the liquid-vapor interface. In principle, this particular feature of the model should allow us to simulate both, the inertia and diffusion controlled regimes, but the model has only been validated for the latter. The next step in the validation process is the simulation of bubble growth under convective conditions. Experiments of single bubbles growing and rising up under normal gravity conditions have shown that the growth exponent is about 0.8, in contrast to the value of 1.0 for the inertial controlled regime and 0.5 for the diffusion controlled regime. In this work, fully three dimensional phase-field simulations of bubble growth under convective conditions are presented, where the predicted bubble size and growth exponent compare very well to experimental observations.

APA, Harvard, Vancouver, ISO, and other styles

3

Baskin, Evelyn. "Field Evaluation of Hotel/Motel Through-the-Wall HVAC Systems Supervisory Controller." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33340.

Full text

Abstract:

Several potential energy-savings devices are available for through-the-wall HVAC (heating, ventilation, and air-conditioning) systems but independent test data quantifying their savings are sparse. This field evaluation and demonstration study quantifies the potential energy savings and assesses the impacts on occupants and staff of using a supervisory HVAC controller in the lodging industry. The supervisory controller operates according to the occupancy status of each room in a hotel or motel. The controller is a plug-in device installed between a wall outlet and the room HVAC unit. Preliminary tests in laboratory simulated environmental conditions suggest that energy savings ranging from 50% to 80% are possible in unoccupied lodging rooms employing the controller (Fisher, 1999). The field study objective was to quantify and verify these estimates and to identify impacts on occupant comfort. The controller was developed as a tool for reducing energy consumption and lowering operating costs in the lodging industry. This paper describes results from a field evaluation of the performance of a supervisory HVAC controller. During the test period, the uncontrolled rooms HVAC energy consumption averaged 2632.2 kWh monthly while the controlled rooms HVACs consume an averaged 1684.6 kWh, which equates to the uncontrolled rooms HVAC consuming an averaged of 947.6 kWh (56.3%) more energy than the units in the controlled room monthly. Due to intermittent inoperability of the controllers and other energy loads (controllers controlled approximately 50% of the hotel’s conditioned space), comparison analysis of the energy cost over a three-year period for the entire hotel does not reveal any discrete savings during the test period over prior years.

APA, Harvard, Vancouver, ISO, and other styles

4

Michalowska, Joanna, Arkadiusz Tofil, Joanna Michalowska, and Jerzy Jozwik. "Prognosis of the electromagnetic field parameters of numerically controlled machine tools in industrial conditions." In 2018 Applications of Electromagnetics in Modern Techniques and Medicine (PTZE). IEEE, 2018. http://dx.doi.org/10.1109/ptze.2018.8503078.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Sánchez Oliveros, Carmen, Laura Martín Aragón, and Raquel Macias Jareño. "Comparison of the emission of IR decoy flare under controlled laboratory and on-field conditions." In SPIE Europe Security + Defence, edited by David H. Titterton and Mark A. Richardson. SPIE, 2009. http://dx.doi.org/10.1117/12.830339.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Ilie, Ana Maria Carmen, Cody Goebel, and Tissa Illangasekare. "Performance assessment of soil moisture sensors under controlled conditions in laboratory setting and recommendations for field deployment." In 5th International Electronic Conference on Water Sciences. Basel, Switzerland: MDPI, 2020. http://dx.doi.org/10.3390/ecws-5-08041.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Palmov, Vladimir, and Len Malinin. "Selection of Vibro-Characteristics for Monitoring Flange Integrity in the Field Conditions." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65024.

Full text

Abstract:

Monitoring of flange integrity in the field traditionally has been based on evaluating bolt tension and deriving pressure on the gasket from these data. Multiple techniques of evaluating bolt tension based on measuring speed of propagation of a longitudinal wave (time of flight), or ratio of speeds of longitudinal and shear waves (“L+S method”), demonstrate 5–10% accuracy in the controlled laboratory conditions [1]. However, accuracy in the field, on the flanges exposed to harsh environment, is often worse than 20%, which makes it difficult to evaluate flange integrity and predict a leak. The need for knowing acousto-elastic parameters of steel (in case of L+S method) may also present a hurdle. Tools based on measuring a shift of the resonance frequencies (RF) are commercially available, though RF are relatively robust to tension, and require a reliable data processing procedure to discern the proper peaks. Evaluation of tension based on natural modes is more sensitive, but relatively complex and costly. Use of transfer functions (TF) offers several advantages over both RF and natural modes, as TFs depend on both RF frequencies and natural modes, and a properly selected parameter of TF can offer greater sensitivity.

APA, Harvard, Vancouver, ISO, and other styles

8

Shahmaleki, P., M. Amiri, and M. Mahzoon. "Adaptive Neuro Fuzzy Control Design of a Solar Power Plant’s Complete Oil Cycle." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90150.

Full text

Abstract:

To enhance the performance and achieve a controlled condition with an optimized system a more precise modeling for power plant dynamics is needed. In this paper, a complete oil cycle of Shiraz solar power plant is modeled and controlled. Also, adaptive network-based fuzzy inference system (ANFIS) was employed to control collectors’ field. Furthermore, fuzzy switching control is utilized In order to prevent chattering phenomena of this multi-loop plant. Simulation results of the oil cycle solar power plant and the controller system show that the applied controller system can manage the oil cycle in different situations within safe operating conditions and with better performances.

APA, Harvard, Vancouver, ISO, and other styles

9

Biery, Nicholas E., Mario L. Macia, Robert J. T. Appleby, Doug P. Fairchild, Doug S. Hoyt, David Dorling, and David Horsley. "Godin Lake Trial: X120 Field Welding." In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10397.

Full text

Abstract:

In February 2004, ExxonMobil and TransCanada PipeLines, Limited (TCPL) cooperated to construct a 1.6 km long segment of X120 pipeline near Wabasca, Alberta. The line included numerous mainline and tie-in welds, and an extra section of pipe was constructed in the field for later destructive testing to assess the characteristics of field welds. This line represented the first field application of welding procedures and consumables developed specifically for X120. The technologies used performed well; productivity and weld repair rates were better than expected, and the properties of these welds made in challenging conditions compare well with development welds made under controlled “shop” conditions.

APA, Harvard, Vancouver, ISO, and other styles

10

Deniz, Sabri. "Effects of Inlet Flow Field Conditions on the Stall Onset of Centrifugal Compressor Vaned Diffusers." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-55221.

Full text

Abstract:

This paper considers the performance and operating range of vaned diffusers for use in high performance centrifugal compressors. An experimental and numerical investigation is performed to determine the effects of inlet flow field conditions on pressure recovery and stall onset of different type vaned diffusers, such as discrete-passage and straight-channel diffusers. Diffuser inlet flow conditions examined include Mach number, flow angle, blockage, and axial flow non-uniformity. The investigation was carried out in a specially built test facility, designed to provide a controlled inlet flow field to the test diffusers. Unsteady pressure measurements showed the operating range of a compressor stage was limited by the onset of rotating stall, triggered by the loss of stability in the vaned diffuser, independent of the impeller operating point. For both diffusers investigated, loss of flow stability in the diffuser occurred at a critical value of the momentum-averaged flow angle into the diffuser. To provide additional information on diffuser flow development and to complement previous experimental work performed on straight-channel type diffuser, a computational investigation has been undertaken and important results are presented.

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Controlled and field conditions"

1

Banin, Amos, Joseph Stucki, and Joel Kostka. Redox Processes in Soils Irrigated with Reclaimed Sewage Effluents: Field Cycles and Basic Mechanism. United States Department of Agriculture, July 2004. http://dx.doi.org/10.32747/2004.7695870.bard.

Full text

Abstract:

The overall objectives of the project were: (a) To measure and study in situ the effect of irrigation with reclaimed sewage effluents on redox processes and related chemical dynamics in soil profiles of agricultural fields. (b) To study under controlled conditions the kinetics and equilibrium states of selected processes that affect redox conditions in field soils or that are effected by them. Specifically, these include the effects on heavy metals sorption and desorption, and the effect on pesticide degradation. On the basis of the initial results from the field study, increased effort was devoted to clarifying and quantifying the effects of plants and water regime on the soil's redox potential while the study of heavy metals sorption was limited. The use of reclaimed sewage effluents as agricultural irrigation water is increasing at a significant rate. The relatively high levels of suspended and, especially, dissolved organic matter and nitrogen in effluents may affect the redox regime in field soils irrigated with them. In turn, the changes in redox regime may affect, among other parameters, the organic matter and nitrogen dynamics of the root zone and trace organic decomposition processes. Detailed data of the redox potential regime in field plots is lacking, and the detailed mechanisms of its control are obscure and not quantified. The study established the feasibility of long-term, non-disturbing monitoring of redox potential regime in field soils. This may enable to manage soil redox under conditions of continued inputs of wastewater. The importance of controlling the degree of wastewater treatment, particularly of adding ultrafiltration steps and/or tertiary treatment, may be assessed based on these and similar results. Low redox potential was measured in a field site (Site A, KibutzGivat Brenner), that has been irrigated with effluents for 30 years and was used for 15 years for continuous commercial sod production. A permanently reduced horizon (Time weighted averaged pe= 0.33±3.0) was found in this site at the 15 cm depth throughout the measurement period of 10 months. A drastic cultivation intervention, involving prolonged drying and deep plowing operations may be required to reclaim such soils. Site B, characterized by a loamy texture, irrigated with tap water for about 20 years was oxidized (Time weighted average pe=8.1±1.0) throughout the measurement period. Iron in the solid phases of the Givat Brenner soils is chemically-reduced by irrigation. Reduced Fe in these soils causes a change in reactivity toward the pesticide oxamyl, which has been determined to be both cytotoxic and genotoxic to mammalian cells. Reaction of oxamyl with reduced-Fe clay minerals dramatically decreases its cytotoxicity and genotoxicity to mammalian cells. Some other pesticides are affected in the same manner, whereas others are affected in the opposite direction (become more cyto- and genotoxic). Iron-reducing bacteria (FeRB) are abundant in the Givat Brenner soils. FeRB are capable of coupling the oxidation of small molecular weight carbon compounds (fermentation products) to the respiration of iron under anoxic conditions, such as those that occur under flooded soil conditions. FeRB from these soils utilize a variety of Fe forms, including Fe-containing clay minerals, as the sole electron acceptor. Daily cycles of the soil redox potential were discovered and documented in controlled-conditions lysimeter experiments. In the oxic range (pe=12-8) soil redox potential cycling is attributed to the effect of the daily temperature cycle on the equilibrium constant of the oxygenation reaction of H⁺ to form H₂O, and is observed under both effluent and freshwater irrigation. The presence of plants affects considerably the redox potential regime of soils. Redox potential cycling coupled to the irrigation cycles is observed when the soil becomes anoxic and the redox potential is controlled by the Fe(III)/Fe(II) redox couple. This is particularly seen when plants are grown. Re-oxidation of the soil after soil drying at the end of an irrigation cycle is affected to some degree by the water quality. Surprisingly, the results suggest that under certain conditions recovery is less pronounced in the freshwater irrigated soils.

APA, Harvard, Vancouver, ISO, and other styles

2

Oron, Gideon, Raphi Mandelbaum, Carlos E. Enriquez, Robert Armon, Yoseph Manor, L. Gillerman, A. Alum, and Charles P. Gerba. Optimization of Secondary Wastewater Reuse to Minimize Environmental Risks. United States Department of Agriculture, December 1999. http://dx.doi.org/10.32747/1999.7573077.bard.

Full text

Abstract:

The main purpose of the research was to examine approaches and to evaluate methods for minimizing the risks during applying treated domestic wastewater for agricultural irrigation. This general purpose consisted of examining under field conditions the possibilities when implementing different application technologies for minimizing health and environmental risks. It was assumed that Subsurface Drip Irrigation (SDI) will provide adequate conditions for safe effluent reuse. Controlled field experiments where conducted in commercial fields to evaluate the alternatives. Main efforts where conducted in Israel in the grape vineyard in Arad heights, in the field crops in Kibbutz Chafets Chaim and in Arizona in fields adjacent to the University campus. The complementary part was to examine the behavior of the various pathogens in the effluent-soil-plant system. The analysis is based on controlled experiments, primarily in greenhouse along with field experiments. Molecular biology methods were used to identify the behavior of the pathogens in the components of the system. The project included as well examining the effluent quality in various sites, primarily those in which treated wastewater is reused for agricultural irrigation. The monitoring included conventional parameters however, also parasites such as Giardia and Cryptosporidium. The results obtained indicate the prominent advantages of using Subsurface Drip Irrigation (SDI) method for minimizing health and environmental risks during application of secondary effluent. A theoretical model for assessing the risks while applying treated wastewater was completed as well. The management model shows the risks during various scenarios of wastewater quality, application technology and related human exposure.

APA, Harvard, Vancouver, ISO, and other styles

3

Willi, Joseph, Keith Stakes, Jack Regan, and Robin Zevotek. Evaluation of Ventilation-Controlled Fires in L-Shaped Training Props. UL's Firefighter Safety Research Institute, October 2016. http://dx.doi.org/10.54206/102376/mijj9867.

Full text

Abstract:

Investigations of recent firefighter line of duty deaths caused by rapid fire progression have highlighted a deficiency in firefighters’ understanding of how certain tactics affect the fire dynamics of ventilation-controlled fires. Many fires are in a ventilation-limited, decay state by the time firefighters arrive at the scene, meaning that introducing additional ventilation to the environment has the potential to cause rapid and intense fire growth. To more effectively teach firefighters about the potential effects of ventilation on a compartment fire, ventilation-controlled fires should be gener- ated during training. Safely creating such fires while maintaining compliance with NFPA 1403: Standard on Live-Fire Training Evolutions allows instructors to educate students on this important principle of fire dynamics in the training environment. Structures utilized for live-fire training have evolved from typical concrete burn buildings to now include smaller purpose-built props, like those constructed from steel shipping containers or wood and gypsum board. Such props have been embraced by organizations due to their cost-effectiveness and potential to improve fire behavior training. Obtaining a thorough understanding of the capa- bilities and limitations of such props is critical for instructors to convey accurate messages during training and properly prepare firefighters for scenarios they’ll encounter in the field. Experiments were conducted to quantify the fire environment in L-shaped props with different wall constructions. One prop had an interior wall lining of gypsum board over wood studs and fiberglass insulation. The two other props were constructed from metal shipping containers with corrugated steel walls; one had ceilings and walls comprised solely of the corrugated steel, while the other had ceilings and walls comprised of rolled steel sheeting over mineral wool insulation with the corrugated steel wall as its backing. Three fuel packages were compared between the props: one contained furnishings mainly composed of synthetic materials and foam plastics; another contained wooden pallets and straw; and the third contained wooden pallets, straw, and oriented strand board (OSB). A stochastic approach was used to compare data between replicate tests and quantify the repeatability of the different props and fuel packages, all of which were deemed sufficiently repeatable. Comparisons of data between the three props revealed that thermal conditions between experiments in the two metal props were indistinguishable, suggesting that the additional layer of insulation did not significantly alter the fire environment. Additionally, thermal conditions in the gypsum-lined prop were more severe than those in the metal props. The effects of ventilation changes on fire conditions were also analyzed across various prop and fuel load combinations. Lastly, the response of the thermal environment in each prop during interior suppression was evaluated, and the results implied that the thermal exposure to the firefighter was more severe in the metal props than the gypsum prop for a brief period following the start of suppression.

APA, Harvard, Vancouver, ISO, and other styles

4

Nedd, Steven. Can a Self-Diagnostic Digitally Controlled Pacemaker/Defibrillator Device be Used for Alerting Military Personnel When a Soldier Health Condition Becomes Compromised Out in the Field. Fort Belvoir, VA: Defense Technical Information Center, January 2007. http://dx.doi.org/10.21236/ada469014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Steven, Nedd. Can A Self-Diagnostic Digitally Controlled Pacemaker/Defibrillator Device be Used For Alerting Military Personnel When a Soldier Health Condition Becomes Compromised Out in the Field. Fort Belvoir, VA: Defense Technical Information Center, September 2006. http://dx.doi.org/10.21236/ada471920.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Butler, Afrachanna, Catherine Thomas, Nathan Beane, Anthony Bednar, and William Frederick. Phytomanagement of soil and groundwater at the Niagara Falls Storage Site (NFSS) using hybridized trees. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42083.

Full text

Abstract:

The Manhattan Engineer District previously used the 191-acre Niagara Falls Storage Site (NFSS) in Niagara County, New York, to store radioactive residues and wastes from uranium (U) ore processing. At present, management practices will determine whether enhanced evapotranspiration rates produced by hybridized shrub willow cuttings planted in 2016 will affect groundwater hydrology. Two shrub willow varieties were planted in an approximately one-half acre area to examine growth performance along a U impacted sanitary sewer line. Additionally, control plots will compare the effectiveness of shrub willows to unplanted areas. Observations of the planted area after 18 months showed success of shrub willow growth with increasing biomass. Chemical analysis from tree tissue samples of the field study showed no significant uptake of U or thorium (Th) to date. A greenhouse study conducted in parallel to the field study tested the willows under controlled greenhouse conditions and evaluated their ability to grow and accumulate contaminants under controlled conditions. Results from the greenhouse study demonstrated that U accumulation was minimal. Thus, this study demonstrates that the shrub willows are not accumulators of U or Th, an advantageous characteristic that implies stabilized contaminants in the soil and no translocation of U into the aboveground biomass.

APA, Harvard, Vancouver, ISO, and other styles

7

Gdowski, G. Long-term corrosion/oxidation studies under controlled humidity conditions. Office of Scientific and Technical Information (OSTI), October 1997. http://dx.doi.org/10.2172/2801.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Rehm, Ronald G., Howard R. Baum, and Daniel W. Lozier. Diffusion-controlled reaction in a vortex field. Gaithersburg, MD: National Bureau of Standards, 1987. http://dx.doi.org/10.6028/nbs.ir.87-3572.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Bradford, Joe, Itzhak Shainberg, and Lloyd Norton. Effect of Soil Properties and Water Quality on Concentrated Flow Erosion (Rills, Ephermal Gullies and Pipes). United States Department of Agriculture, November 1996. http://dx.doi.org/10.32747/1996.7613040.bard.

Full text

Abstract:

Concentrated flow erosion in rills, pipes, ephermal gullies, and gullies is a major contributor of downstream sedimentation. When rill or gullies form in a landscape, a 3- to 5-fold increase in soil loss commonly occurs. The balance between the erosive power of the flow and the erosion resistance of the bed material determines the rate of concentrated flow erosion. The resistance of the bed material to detachment depends primarily on the magnitude of the interparticle forces or cohesion holding the particles and aggregates together. The effect of soil properties on bed material resistance and concentrated flow erosion was evaluated both in the laboratory and field. Both rill erodibility and critical hydraulic shear were greater when measured in 9.0 m long rills under field conditions compared with laboratory mini-flumes. A greater hydraulic shear was required to initiate erosion in the field compared to the mini-flume because of the greater aggregate and clod size and stability. Once erosion was initiated, however, the rate of erosion as a function of hydraulic shear was greater under field conditions because of the greater potential for slaking upon wetting and the greater soil surface area exposed to hydraulic shear. Erosion tests under controlled laboratory conditions with the mini-flume allowed individual soil variables to be studied. Attempts to relate rill erosion to a group soil properties had limited success. When individual soil properties were isolated and studied separately or grouped separately, some trends were identified. For example, the effect of organic carbon on rill erodibility was high in kaolinitic soils, low in smectitic soils, and intermediate in the soils dominated by illite. Slow prewetting and aging increased the cohesion forces between soil particles and decreased rill erodibility. Quick prewetting increased aggregate slaking and increased erodibility. The magnitude of the effect of aging depended upon soil type. The effect of clay mineralogy was evaluated on sand/clay mixtures with montmorillonite (M), Illite (I), and kaolinite (K) clays. Montmorillonite/sand mixtures were much less erodible than either illite or kaolonite sand mixtures. Na-I and Na-K sand mixtures were more erodible than Ca-I and Ca-K due to increased strength from ionic bonding and suppression of repulsive charges by Ca. Na-M was less erodiblethan Ca-M due to increased surface resulting from the accessibility of internal surfaces due to Na saturation. Erodibility decreased when salt concentration was high enough to cause flocculation. This occurred between 0.001 mole L-1 and 0.01 mole L-1. Measuring rill erodibility in mini-flumes enables the measurement of cohesive forces between particles and enhances our ability to learn more about cohesive forces resisting soil detachment under concentrated water flow.

APA, Harvard, Vancouver, ISO, and other styles

10

Hardin, Ernest. Deep Borehole Field Test Requirements and Controlled Assumptions. Office of Scientific and Technical Information (OSTI), July 2015. http://dx.doi.org/10.2172/1234958.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!