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Journal articles on the topic 'Field-maintained'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Khusanov, S. O., and G. B. Turgunova. "WATER CONSUMPTION OF SHADE EXPERIMENTAL FIELD MAINTAINED AS A REPEAT CROP IN DIFFERENT IRRIGATION REGIMES." CURRENT RESEARCH JOURNAL OF HISTORY 02, no. 08 (August 31, 2021): 6–9. http://dx.doi.org/10.37547/history-crjh-02-08-02.

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2

Weyand, Kurt. "Magnetic field standards -- tracing to the maintained units." International Journal of Applied Electromagnetics and Mechanics 13, no. 1-4 (December 17, 2002): 195–202. http://dx.doi.org/10.3233/jae-2002-340.

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3

Mirpour, Koorosh, Zeinab Bolandnazar, and James W. Bisley. "Suppression of frontal eye field neuronal responses with maintained fixation." Proceedings of the National Academy of Sciences 115, no. 4 (January 8, 2018): 804–9. http://dx.doi.org/10.1073/pnas.1716315115.

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The decision of where to make an eye movement is thought to be driven primarily by responses to stimuli in neurons’ receptive fields (RFs) in oculomotor areas, including the frontal eye field (FEF) of prefrontal cortex. It is also thought that a saccade may be generated when the accumulation of this activity in favor of one location or another reaches a threshold. However, in the reading and scene perception fields, it is well known that the properties of the stimulus at the fovea often affect when the eyes leave that stimulus. We propose that if FEF plays a role in generating eye movements, then the identity of the stimulus at fixation should affect the FEF responses so as to reduce the probability of making a saccade when fixating an item of interest. Using a visual foraging task in which animals could make multiple eye movements within a single trial, we found that responses were strongly modulated by the identity of the stimulus at the fovea. Specifically, responses to the stimulus in the RF were suppressed when the animal maintained fixation for longer durations on a stimulus that could be associated with a reward. We suggest that this suppression, which was predicted by models of eye movement behavior, could be a mechanism by which FEF can modulate the temporal flow of saccades based on the importance of the stimulus at the fovea.

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4

Lu, Qianwen, Carol Miles, Haiying Tao, and Lisa Wasko DeVetter. "Reduced Nitrogen Fertilizer Rates Maintained Raspberry Growth in an Established Field." Agronomy 12, no. 3 (March 10, 2022): 672. http://dx.doi.org/10.3390/agronomy12030672.

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Optimizing nitrogen (N) fertilizer rates maintains good red raspberry (Rubus idaeus L.) production while alleviating environmental risks. Although raspberry growers in Washington are using the caneberry nutrient management guides derived from western Oregon, these guides may not be appropriate for other production regions given the differences in climate, soil type, and crop productivity. However, limited research has been conducted to observe the impact of the N fertilizer rate on floricane red raspberry growth, yield, and fruit quality in Washington. The aim of this study is to evaluate the response of “Meeker” floricane red raspberries grown in northwest Washington, USA, to different N fertilizer rates in order to provide information for future local nutrient management guides. Treatments of urea (46% nitrogen (N)) were surface-applied to raised beds of established ‘Meeker’ raspberry plots at controls, low, medium, and high rates (0, 34, 67, and 101 kg N ha−1, respectively) in 2019 and 2020. The experiment was arranged in a randomized complete block with three replications. Fruit yield and quality, plant growth and leaf tissue nutrient concentrations, and soil characteristics were evaluated. There were no N fertilizer rate treatment effects for the yield, fruit quality, plant growth, leaf tissue nutrient concentrations, and soil characteristics, except for fruit titratable acidity and soil ammonium (NH4-N) concentrations. The lack of a plant response may be due to nutrients mineralized from soil organic matter (3.81–4.0%) and the utilization of plant nutrient reserves. Based on the results, the soil organic matter level and plant nutrient reserves should be considered when making nutrient management suggestions. Fertilizer costs as well as the potential for environmental pollution from excess fertilizers could be reduced through utilizing these two potential sources of nutrients. Furthermore, longer periods of research is warranted to understand how to adjust N fertilizer rates based on plant and soil characteristics while sustaining yields.

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5

Fortes Júnior, W. F., R. C. A. Berber, T. V. Souza, A. C. Rosa, and I. Deconto. "Cytology pulmonary in horses (Equus caballus) maintained the field or stabled." Scientific Electronic Archives 9, no. 5 (November 17, 2016): 57. http://dx.doi.org/10.36560/952016404.

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Tracheobronchial secretion was collected by endoscopy (Welch-AllynÒ, 200cm long and 9mm diameter), from equines with different ages, races and sex, for posterior cytological analysis. Thirty-six equines were divided into two groups (Group I = stabled, n = 18; Group II = field regimen, n = 18). Animals of Group I (age = 3.5 years) were lodged in the Tarumã´s Jockey Club in Curitiba, Parana State. The equines of Group II always were maintained at field condition (never were stabled), in the farm located in Jacarezinho, Paraná State. Following endoscopic exams, tracheobronchial secretion smears were stained by Pappenhein´s method and submitted to cytological analysis. Group I had higher frequency of tracheal discharge than Group II. The cytological analysis showed more presence of macrophages (58.8%), foamy cells (2.3%), body giant cells (0.2%), neutrophils (4.57%), eosinophils (0.7%) and Curshmann´s spirals (0.04%) on 3 of the 18 animals. The cytological analysis of Group II showed higher frequency of ciliated epithelial cells than Group I, and no Curshmann´s spirals were observed. In conclusion, data showed that horses stabled had more cytological alterations than the animals maintained at field, therefore more tracheobronchial complications. Thus, the care of place where horse are stabled have influence on development of respiratory diseases, may predispose to affections as Chronic Obstructive Pulmonary Disease and Exercise-Induced Pulmonary Hemorrhage, as well athletic horses may be never reach their full respiratory potential.

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6

Mamei, Marco, and Franco Zambonelli. "Self-maintained distributed tuples for field-based coordination in dynamic networks." Concurrency and Computation: Practice and Experience 18, no. 4 (2006): 427–43. http://dx.doi.org/10.1002/cpe.947.

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7

SEN, S. N., S. K. SADHYA, M. GANTAIT, and D. C. JANA. "Persistence of afterflow maintained by a radiofrequency field in a mercury arc." International Journal of Electronics 63, no. 1 (July 1987): 55–59. http://dx.doi.org/10.1080/00207218708939108.

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8

Santos, Julio Cesar de Araujo, Igor Felipe Ferreira de Vasconcelos, Denise Batista Nogueira, Joao Pessoa Araujo Junior, Camila Dantas Malossi, Leila Sabrina Ullmann, Carolina de Sousa Américo Batista Santos, Clebert José Alves, Maria Luana Cristiny Rodrigues Silva, and Sérgio Santos de Azevedo. "New insights on Leptospira sp. infection in ewes maintained in field semiarid conditions." Acta Tropica 234 (October 2022): 106610. http://dx.doi.org/10.1016/j.actatropica.2022.106610.

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9

Gibbs, P. G., and K. E. Davison. "A field study on reproductive efficiency of mares maintained predominately on native pasture." Journal of Equine Veterinary Science 12, no. 4 (July 1992): 219–22. http://dx.doi.org/10.1016/s0737-0806(06)81449-8.

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10

Rädler, K. H. "Can the highly axisymmetric magnetic field of Saturn be maintained by a dynamo?" Advances in Space Research 12, no. 8 (August 1992): 281–84. http://dx.doi.org/10.1016/0273-1177(92)90398-h.

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11

Rajawat, Brijendra Singh, Anshuman Rathod, P. D. Kumawat, Satish Hadiyal, Ramesh Rathod, and Mitesh Gaur. "Udder and Teat Characteristics of Surti Buffaloes Maintained Under Farm and Field Conditions." Journal of Krishi Vigyan 5, no. 2 (2017): 170. http://dx.doi.org/10.5958/2349-4433.2017.00038.1.

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12

McCaw, Monte B., Jinsheng Xu, and Maria Teresa Correa. "Survival of Pseudorabies Virus on Swabs Maintained under Standard Field Sample Shipping Conditions." Journal of Veterinary Diagnostic Investigation 7, no. 1 (January 1995): 56–59. http://dx.doi.org/10.1177/104063879500700108.

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13

Ben Abdelkader, Faten, Guillaume Kairo, Sylvie Tchamitchian, Marianne Cousin, Jaques Senechal, Didier Crauser, Jean Paul Vermandere, et al. "Semen quality of honey bee drones maintained from emergence to sexual maturity under laboratory, semi-field and field conditions." Apidologie 45, no. 2 (October 3, 2013): 215–23. http://dx.doi.org/10.1007/s13592-013-0240-7.

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14

Zaidi, Hasan Nihal, Mohammed Yousif, and S. Nazia Nasreen. "Effects of Thermal Radiation, Heat Generation, and Induced Magnetic Field on Hydromagnetic Free Convection Flow of Couple Stress Fluid in an Isoflux-Isothermal Vertical Channel." Journal of Applied Mathematics 2020 (September 7, 2020): 1–12. http://dx.doi.org/10.1155/2020/4539531.

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The study scrutinizes the effects of thermal radiation, heat generation, and induced magnetic field on steady, fully developed hydromagnetic free convection flow of an incompressible viscous and electrically conducting couple stress fluid in a vertical channel. The channel walls are maintained at an isoflux-isothermal condition, such that the left channel wall is maintained at a constant heat flux. In contrast, the right channel wall is maintained at a constant temperature. The governing simultaneous equations are solved analytically utilizing the method of undetermined coefficient, and closed form solutions in dimensionless form have been acquired for the velocity field, the induced magnetic field, and the temperature field. The expression for the induced current density has been also obtained. A parametric study for the velocity, temperature, and induced magnetic field profiles, as well as for the skin-friction coefficient, Nusselt number, and induced current density, is conducted and discussed graphically.

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15

Tanner, Jessie C., Elizabeth Swanger, and Marlene Zuk. "Sexual signal loss in field crickets maintained despite strong sexual selection favoring singing males." Evolution 73, no. 7 (June 27, 2019): 1482–89. http://dx.doi.org/10.1111/evo.13761.

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16

Tennakoon, P. L. K., R. M. C. P. Rajapaksha, and L. S. K. Hettiarachchi. "Tea yield maintained in PGPR inoculated field plants despite significant reduction in fertilizer application." Rhizosphere 10 (June 2019): 100146. http://dx.doi.org/10.1016/j.rhisph.2019.100146.

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17

Arambourou, Hélène, Philippe Branchu, and Jean-Nicolas Beisel. "Increase in Developmental Instability in a Field-Collected Chironomus Population Maintained Under Laboratory Conditions." Bulletin of Environmental Contamination and Toxicology 94, no. 6 (March 7, 2015): 681–87. http://dx.doi.org/10.1007/s00128-015-1497-5.

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18

Nunome, Hiroyuki, Koichiro Inoue, Kevin Ball, Shinya Sano, and Yasuo Ikegami. "High Load Stress-Strain Property of Natural Turf for Professional Use, Various Types of Natural, Hybrid and Artificial Turfs in Football." Proceedings 49, no. 1 (June 15, 2020): 142. http://dx.doi.org/10.3390/proceedings2020049142.

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High load quasi stress-strain (qSS) properties of professionally maintained natural turf (N-pro) was compared with eight natural, hybrid or artificial turfs: one professionally maintained natural turf in a sub field and one grown in a test field without maintenance, two hybrid turfs (one in the sub field and one grown in the test field without maintenance), three new artificial turfs (sand, rubber and sand/rubber infill) and one aged artificial turf (eight years old with sand/rubber infill). N-pro was characterized with a distinctive magnitude of plastic deformation and hysteresis profile, indicating its more energy absorbable properties compared to the artificial turfs. Apparent differences exist between N-pro and other natural turfs, suggesting factors such as daily maintenance work and sod compositions are very influential. Clear differences were also observed when the hybrid turf was professionally maintained. The aged artificial turf becomes substantially stiffer indicating usage over years affects the stiffness.

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19

Gallaher, Courtney, and Sieglinde S. Snapp. "Organic management and legume presence maintained phosphorus bioavailability in a 17-year field crop experiment." Renewable Agriculture and Food Systems 30, no. 3 (October 31, 2013): 211–22. http://dx.doi.org/10.1017/s1742170513000380.

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AbstractLegumes have been shown to enhance bioavailability of phosphorus (P) from sparingly soluble pools, yet this functional trait remains underutilized in agriculture, and is untested at decadal scales. Management and legume presence effects on temporal soil properties were evaluated in a 17-year field crop experiment using soil samples collected in 1992, 2000 and 2006. Management systems compared included: (1) conventional corn–soybean–wheat rotation (C–S–W), (2) organic (C–S–W+red clover), (3) alfalfa and (4) early successional field. To evaluate the effects of long-term management versus recent management (residues and P fertilizer) on P and bio-availability to soybean, subplots of soybean were established with and without P-fertilizer (30 kg P ha−1), and compared to subplots and main plot with the long-term system. We evaluated soil properties (C, total P, Bray extractable inorganic P, particulate organic matter phosphorus) and soybean P uptake, biomass and yield. Recent fertilizer P inputs had no detectable influence on soil P, and total soil P stayed stable at ~350 mg P kg−1, whereas inorganic P (Pi) declined from an initial value of 54 to an average of 35 mg P kg−1. A P balance was constructed and showed a net loss of −96.7 kg P ha−1 yr−1 for the organic system, yet Bray-Pi and soybean P uptake were maintained under organic production at similar levels to the conventional, fertilized system. Particulate organic matter P was 57, 82 and 128% higher in organic, alfalfa and successional treatments, respectively, compared to conventional. A similar pattern was observed for soil C, soybean yield and bioavailable P, which were 20–50% higher in the organic, alfalfa and successional systems relative to conventional. This study provides evidence that long-term management history influences bioavailability of P.

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20

Taylor, Lathrop, and T. H. Friend. "Open-field test behavior of growing swine maintained on a concrete floor and a pasture." Applied Animal Behaviour Science 16, no. 2 (September 1986): 143–48. http://dx.doi.org/10.1016/0168-1591(86)90106-1.

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21

Rawte, D., N. Kumbhakar, D. Kumar, Archana E. Kerketta, P. K. Sanyal, and S. Pal. "Status of anthelmintic resistance in goats maintained under field and farm conditions in chhattisgarh plain." Indian Journal of Small Ruminants (The) 21, no. 2 (2015): 356. http://dx.doi.org/10.5958/0973-9718.2015.00084.7.

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22

Rawte, D., Archana E. Kerketta, N. Kumbhakar, D. Kumar, P. K. Sanyal, and S. Pal. "Epidemiology of gastrointestinal nematodosis in goats maintained at farm and field conditions in chhattisgarh plain." Indian Journal of Small Ruminants (The) 21, no. 2 (2015): 273. http://dx.doi.org/10.5958/0973-9718.2015.00085.9.

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23

Hugrass, W. N., and M. Turley. "The orbits of electrons and ions in the fields of the rotamak." Journal of Plasma Physics 37, no. 1 (February 1987): 1–13. http://dx.doi.org/10.1017/s0022377800011958.

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The motion of electrons and ions in the self-consistent fields of a compact toroidal equilibrium maintained by means of a rotating magnetic field is studied. It is found that the particles are confined although the lines of the instantaneous magnetic field are open. The results are compared with those obtained in an earlier study of the motion of charged particles in the self-consistent fields appropriate to cylindrical plasma equilibrium maintained by means of rotating magnetic fields.

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24

NAKAZAWA, NAOHITO. "SUPERSPACE FORMULATION OF STOCHASTIC BACKGROUND FIELD METHOD." Modern Physics Letters A 04, no. 06 (March 20, 1989): 569–79. http://dx.doi.org/10.1142/s0217732389000691.

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We formulate the background field method for a nonlinear σ-model in stochastic quantization based on the superspace formulation. In addition to the general covariance, the BRS invariance of the system is manifestly maintained in our formulation.

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25

Bakar, N. A., A. Karimipour, and R. Roslan. "Effect of Magnetic Field on Mixed Convection Heat Transfer in a Lid-Driven Square Cavity." Journal of Thermodynamics 2016 (March 15, 2016): 1–14. http://dx.doi.org/10.1155/2016/3487182.

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The effect of magnetic field on fluid flow and heat transfer in two-dimensional square cavity is analyzed numerically. The vertical walls are insulated; the top wall is maintained at cold temperature, Tc while the bottom wall is maintained at hot temperature, Th where Th>Tc. The dimensionless governing equations are solved using finite volume method and SIMPLE algorithm. The streamlines and isotherm plots and the variation of Nusselt numbers on hot and cold walls are presented.

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26

Loehrlein, Aaron. "An examination of interdisciplinary theory between cognitive categorization and knowledge organization." NASKO 3, no. 1 (November 2, 2011): 122. http://dx.doi.org/10.7152/nasko.v3i1.12796.

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This paper is a preliminary comparison of the theories used to represent concepts in the field of knowledge organization with similar theories that are used in the field of cognitive categorization. Both disciplines employ the same general types of conceptual representations, such as features, dimensions, labels and relationships. Both disciplines are also concerned with how people use these representations to organize and retrieve information. However, cognitive categorization is generally concerned with internal conceptual representations (ICRs), which are maintained in memory, while knowledge organization is generally concerned with external conceptual representations (ECRs), which are maintained outside of memory. This fundamental distinction has profound effects on how the representations are structured, accessed and maintained. This paper explores these differences and points out cases in which ICRs and ECRs may affect each other. This analysis will support future research that utilizes ICRs in the study and evaluation of ECRs.

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27

Gabriel, Abu, Paterne Agre, Alex Edemodu, A. E. Okon, Ranjana Bhattacharjee, and David De Koyer. "Genetic Diversity of White Yam (Dioscorea rotundata Poir) Accessions Maintained in Tissue Culture and Cultivated in Field using Simple Sequence Repeat (SSR) Markers and Morphological Characterization." Journal of Agriculture and Crops, no. 72 (February 20, 2021): 60–68. http://dx.doi.org/10.32861/jac.72.60.68.

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Dioscorea rotundata is a staple food crop for millions of people in the tropical and subtropical regions. In vitro germplasm conservation is a very useful tool in yam improvement strategies but very little is known about the genetic integrity and stability of in-vitro conserved yam plants. In this study, 42 accessions from in vitro and field populations were genotyped using 11 microsatellite markers and 23 morphological descriptors to assess variability within and between accessions. Out of the 23 morphological variables used, 13 were identified as most discriminate and were used to cluster the accessions into 4 clusters using the unweighted pair group arithmetic mean average (UPGMA). Accession maintained in field as well as in in-vitro showed high genetic similarity (R2 = 0.91, p-value: 1e-04). Out of the 42 accessions analyzed, nine accessions maintained in the field and in-vitro displayed different genetic profiles. This study provided basic information on the possible somaclonal variation of yam accessions maintained through in-vitro. Further study with advanced tools such as next-generation sequencing is required to elucidate the nature of the observed variation within clones.

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28

FONSECA-BARBATTI, CARLA, M. NOVELLO, J. M. SALIM, and REGINA C. ARCURI. "CREATION OF A WORMHOLE DUE TO NONLINEAR ELECTRODYNAMICS." Modern Physics Letters A 17, no. 20 (June 28, 2002): 1305–14. http://dx.doi.org/10.1142/s0217732302007235.

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We obtain a new class of solutions for the Einstein field equations which describe wormholes by using the one-loop effective Lagrangian of quantum electrodynamics. We also show that the derived wormholes can be maintained only by means of a magnetic field.

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29

Ihara, Nozomi, and Hiroyuki Kobayashi. "Populations of Ipomoea hederacea var. integriuscula in Field Margins Are Maintained by Seed Production of Individuals from a Specific cohort." Agronomy 12, no. 10 (October 3, 2022): 2392. http://dx.doi.org/10.3390/agronomy12102392.

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Entireleaf morning glory (Ipomoea hederacea Jacq. var. integriuscula A. Gray) is a difficult-to-control weed that causes severe yield loss in soybean (Glycine max L.). It invades fields from the field margins and contributes to maintenance of the populations in the fields. This study aimed to determine the optimal period to control the populations in field margins effectively. We identified the naturally emerging plants in field margins and adjacent fields. We recorded the number of invading vines and the timing of flowering and fruiting of several cohorts (each cohort comprised a group of individuals that emerged within a certain time frame). The main seed-producing cohort on the field margins was a cohort that emerged from early August to mid-September and flowered and fruited after mid-September. The weed formed seed banks in the field margins, maintained by repeated depletion and accumulation during the emergence and seed production stages. The weed control rate by weed management practices was higher in field margins (100%) than in the fields (76%). In conclusion, the entireleaf morning glory populations were maintained by specific cohorts in field margins and weed management practices from early August to mid-September can effectively reduce its population size in the field margins.

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30

Muradov, M. I. "Theory of fluctuations around a nonequilibrium state maintained by interband optical and driving electric field in semiconductors." Physical Review B 58, no. 19 (November 15, 1998): 12883–98. http://dx.doi.org/10.1103/physrevb.58.12883.

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31

Day, Jonathan F., John D. Edman, and Thomas W. Scott. "Reproductive Fitness and Survivorship of Aedes aegypti (Diptera: Culicidae) Maintained on Blood, with Field Observations from Thailand." Journal of Medical Entomology 31, no. 4 (July 1, 1994): 611–17. http://dx.doi.org/10.1093/jmedent/31.4.611.

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32

Cueto, MI, AE Gibbons, F. Pereyra-Bonnet, P. Silvestre, and A. González-Bulnes. "Effects of Season and Superovulatory Treatment on Embryo Yields in Fine-Wool Merinos Maintained Under Field Conditions." Reproduction in Domestic Animals 46, no. 5 (December 30, 2010): 770–75. http://dx.doi.org/10.1111/j.1439-0531.2010.01738.x.

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33

Campbell, C. G. "A Magnetic Alternative to the Standard Viscous Accretion Disc." International Astronomical Union Colloquium 163 (1997): 201–4. http://dx.doi.org/10.1017/s0252921100042640.

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AbstractA magnetic alternative to the standard viscous accretion disc is presented. The magnetic field is generated and maintained in the disc by a dynamo mechanism. Magnetic stresses dominate in the advection of angular momentum, and only weak turbulence is needed to generate the required field.

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34

Green, R. L., S. I. Sifers, C. E. Atkins, and J. B. Beard. "Evapotranspiration Rates of Eleven Zoysia Genotypes." HortScience 26, no. 3 (March 1991): 264–66. http://dx.doi.org/10.21273/hortsci.26.3.264.

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We compared evapotranspiration (ET) rates for 11 Zoysia genotypes, encompassing two species and their hybrid, maintained at nonlimiting soil moisture under field conditions and in an environmental chamber of high evaporative potential. ET rate relationships to leaf area [leaf extension rate (LER)], canopy resistance [shoot density (SHD)], and internal resistance [abaxial (AB) and adaxial (AD) leaf blade stomatal densities] characteristics were determined. Three-year ET rate means were not significantly different among genotypes in the field study, but ET rates among genotypes differed significantly under the higher evaporative potential of an environmental-chamber study. ET rate was not significantly correlated with LER for either the data from the field or the chamber. ET rates of both types of tests also were not significantly correlated with SHD or AB or AD leaf blade stomatal density. Data from field and environmental-chamber research suggest that differences of individual morphological traits among the 11 zoysiagrasses do not influence the ET rate when measured from minilysimeters maintained at nonlimiting soil moisture.

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35

Rodin, K. A., and A. B. Nevezhina. "Influence of the water and food regime of the soil on the yield of rice varieties during sprinkling in the Lower Volga region." IOP Conference Series: Earth and Environmental Science 965, no. 1 (January 1, 2022): 012015. http://dx.doi.org/10.1088/1755-1315/965/1/012015.

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Abstract In the Russian Federation, as in most countries of the world, rice is cultivated under artificial irrigation by flooding the field with a layer of water, which is maintained during almost the entire growing season. Unfortunately, within the rice-growing zone in the Russian Federation, water resources are limited and this limits the expansion of sown areas under flooded rice. At the same time, judging by the biological characteristics of this plant, a fundamentally different method of rice cultivation is also possible, when the field occupied by it is not flooded. The rice’s water demand is met by using the soil moisture reserves, which are maintained at a certain level by irrigation.

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36

Filimon, Marioara Nicoleta, Diana Larisa Roman, Despina Maria Bordean, and Adriana Isvoran. "Impact of the Herbicide Oxyfluorfen on the Activities of Some Enzymes Found in Soil and on the Populations of Soil Microorganisms." Agronomy 11, no. 9 (August 26, 2021): 1702. http://dx.doi.org/10.3390/agronomy11091702.

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This study assesses the effects of the herbicide oxyfluorfen on the activities of enzymes and on the populations of soil microorganisms by considering experiments on soil samples maintained in both laboratory and in field conditions. Furthermore, the molecular docking approach was used to evaluate the interactions of oxyfluorfen with enzymes found in soil. There was a dose dependent inhibitory effect of oxyfluorfen against the activities of dehydrogenase, phosphatase, protease and urease. The enzymes activities obtained for the soil samples maintained under field conditions usually reflected a different trend than those obtained under laboratory conditions, emphasizing the influence of the soil physicochemical properties. For soil samples maintained in field conditions and for the normal dose of oxyfluorfen, dehydrogenase activity recovered after 14 days and a minimum of 21 days was necessary for the recovery of phosphatase, urease and protease activity, respectively. The most important parameters of soil influencing the activities of enzymes and the populations of microorganisms were the pH, N-NO3 and N-NH4 contents. A dose dependent behavior of populations of microorganisms found in soil treated with oxyfluorfen has been shown. There was a slight grows of the colonies of microorganisms when oxyfluorfen was applied, but this growth decreased with increasing the oxyfluorfen concentration.

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37

Ramey, Andrew M., Andrew B. Reeves, Judith Z. Drexler, Joshua T. Ackerman, Susan De La Cruz, Andrew S. Lang, Christina Leyson, et al. "Influenza A viruses remain infectious for more than seven months in northern wetlands of North America." Proceedings of the Royal Society B: Biological Sciences 287, no. 1934 (September 9, 2020): 20201680. http://dx.doi.org/10.1098/rspb.2020.1680.

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In this investigation, we used a combination of field- and laboratory-based approaches to assess if influenza A viruses (IAVs) shed by ducks could remain viable for extended periods in surface water within three wetland complexes of North America. In a field experiment, replicate filtered surface water samples inoculated with duck swabs were tested for IAVs upon collection and again after an overwintering period of approximately 6–7 months. Numerous IAVs were molecularly detected and isolated from these samples, including replicates maintained at wetland field sites in Alaska and Minnesota for 181–229 days. In a parallel laboratory experiment, we attempted to culture IAVs from filtered surface water samples inoculated with duck swabs from Minnesota each month during September 2018–April 2019 and found monthly declines in viral viability. In an experimental challenge study, we found that IAVs maintained in filtered surface water within wetlands of Alaska and Minnesota for 214 and 226 days, respectively, were infectious in a mallard model. Collectively, our results support surface waters of northern wetlands as a biologically important medium in which IAVs may be both transmitted and maintained, potentially serving as an environmental reservoir for infectious IAVs during the overwintering period of migratory birds.

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38

QUERTS, ELIZABETH RODRÍGUEZ, HUGO PÉREZ ROJAS, and AURORA PÉREZ MARTÍNEZ. "EFFECT OF A MAGNETIC FIELD ON THE ELECTROWEAK SYMMETRY." International Journal of Modern Physics D 13, no. 07 (August 2004): 1261–65. http://dx.doi.org/10.1142/s0218271804005407.

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We discuss the effect of a strong magnetic field in the behavior of the symmetry of an electrically neutral electroweak plasma. We analyze the case of a strong magnetic field and low temperatures as compared with the W rest energy. If the magnetic field is large enough, it is self-consistently maintained. Charged vector bosons play the most important role, leading only to a decrease of the symmetry breaking parameter, the symmetry restoration not being possible.

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39

Drake, Nadia. "Atom & cosmos: How the moon kept its magnetism: Outside forces may have maintained the ancient lunar field." Science News 180, no. 13 (December 8, 2011): 17. http://dx.doi.org/10.1002/scin.5591801323.

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40

QUERTS, E. RODRÍGUEZ, A. MARTÍN CRUZ, and H. PÉREZ ROJAS. "EFFECT OF A MAGNETIC FIELD ON THE BROKEN ELECTROWEAK SYMMETRY." International Journal of Modern Physics A 17, no. 04 (February 10, 2002): 561–73. http://dx.doi.org/10.1142/s0217751x02006067.

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We discuss the effect of a strong magnetic field in the behavior of the symmetry of an electrically neutral electroweak plasma. We analyze the case of a strong field and low temperatures as compared with the W rest energy. If the magnetic field is large enough, it is self-consistently maintained. It is shown that the charged vector bosons play the most important role, leading only to a decrease of the symmetry breaking parameter, the symmetry restoration not being possible.

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41

Yamauchi, M., I. Dandouras, P. W. Daly, G. Stenberg, H. U. Frey, P. A. Lindqvist, Y. Ebihara, et al. "Magnetospheric solitary structure maintained by 3000 km/s ions as a cause of westward moving auroral bulge at 19 MLT." Annales Geophysicae 27, no. 7 (July 27, 2009): 2947–69. http://dx.doi.org/10.5194/angeo-27-2947-2009.

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Abstract. In the evening equatorial magnetosphere at about 4 RE geocentric distance and 19 MLT, the four Cluster spacecraft observed a solitary structure with a width of about 1000~2000 km in the propagation direction. The solitary structure propagates sunward with about 5~10 km/s carrying sunward electric field (in the propagation direction) of up to about 10 mV/m (total potential drop of about 5~10 kV), depletion of magnetic field of about 25%, and a duskward E×B convection up to 50 km/s of He+ rich cold plasma without O+. At the same time, auroral images from the IMAGE satellite together with ground based geomagnetic field data showed a westward (sunward at this location) propagating auroral bulge at the magnetically conjugate ionosphere with the solitary structure. The solitary structure is maintained by flux enhancement of selectively 3000 km/s ions (about 50 keV for H+, 200 keV for He+, and 750 keV for O+). These ions are the main carrier of the diamagnetic current causing the magnetic depletion, whereas the polarization is maintained by different behavior of energetic ions and electrons. Corresponding to aurora, field-aligned accelerated ionospheric plasma of several keV appeared at Cluster from both hemispheres simultaneously. Together with good correspondence in location and propagation velocity between the auroral bulge and the solitary structure, this indicates that the sunward moving auroral bulge is caused by the sunward propagation of the solitary structure which is maintained by energetic ions. The solitary structure might also be the cause of Pi2-like magnetic variation that started simultaneously at Cluster location.

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42

GARBACZEWSKI, PIOTR. "CANONICAL ACTION-ANGLE FORMALISM FOR QUANTIZED NONLINEAR FIELDS." International Journal of Modern Physics A 02, no. 01 (February 1987): 223–48. http://dx.doi.org/10.1142/s0217751x87000090.

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The canonical quantizations of field and action-angle coordinates which (locally) parametrize the phase manifold for the same nonlinear field theory model (e.g. sine-Gordon and nonlinear Schrödinger with the attractive coupling) are reconciled on the common for both cases state space. The classical-quantum relationship is maintained in the mean: coherent state expectation values of operators give rise to classical objects.

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43

Meng, Xiangshen, Jian Li, Yueqiang Lin, Xiaodong Liu, Jianwei Zhao, Decai Li, and Zhenghong He. "Periodic Electro-Optical Characteristics of PDLC Film Driven by a Low-Frequency Square Wave Voltage." Crystals 12, no. 2 (January 24, 2022): 163. http://dx.doi.org/10.3390/cryst12020163.

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The electro-optical features of the PDLC films applied with a low-frequency square wave voltage were investigated. The transmittance curves indicated the double frequency of the applied voltage at 0–50 Hz, which resulted from the relaxation of an internal electric field polarized by ions in LC droplets. When the local electric field was reversed, the internal polarization electric field could be maintained and superimposed on the local electric field. The relaxation of the internal polarized electric field resulted in the relaxation of the transmittance. Furthermore, the transmittance curves changed with the frequency of the applied voltage.

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44

Thompson, Johnnie, Linda Bakken, and Wei-Cheng Mau. "Equity Education: A Longitudinal Study Comparing Multicultural Knowledge and Dispositions of Field-Based and Campus-Based Teacher Candidates." Policy Futures in Education 7, no. 4 (January 1, 2009): 416–22. http://dx.doi.org/10.2304/pfie.2009.7.4.416.

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Two groups of teacher candidates, enrolled either in a field-based or campus-based program, were measured before and after their first semester of teacher education courses and again at the end of their student teaching semester. The two groups were compared regarding their knowledge of multicultural education issues, dispositions towards diverse populations, and their perception of confidence in teaching in diverse classrooms. Multivariate analyses of variance (MANOVAs) with repeated measures indicated that there was a significant increase for both groups in multicultural knowledge after the first semester and that this knowledge was maintained throughout their program. Results also indicated that there was a significant increase in a positive attitude toward multicultural education for both groups after their first semester; however, this positive attitude was not maintained. In terms of perceived confidence in teaching, both groups increased after the first semester, and the field-based group continued to increase until the end of their undergraduate program. The findings suggest that the field-based experience continues to impact students' multicultural knowledge and their perceived self-efficacy.

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45

Ashworth, E. N., J. A. Anderson, G. A. Davis, and G. W. Lightner. "Ice Formation in Prunus persica under Field Conditions." Journal of the American Society for Horticultural Science 110, no. 3 (May 1985): 322–24. http://dx.doi.org/10.21273/jashs.110.3.322.

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Abstract Ice formation was initiated between –0.6° and –2.6°C in mature Prunus persica (L.) Batsch trees growing in the field. Trees supercooled very little. Ice formation was initiated at several locations in the tree and subsequently spread throughout. The release of the latent heat of fusion following ice formation in the tissue maintained tissue temperatures 1° to 3° above air temperature for several hours and mitigated the tissue's response to ambient temperatures.

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46

HIRUMA, Takahiro, Akihiko ENAMITO, and Osamu NISHIMURA. "102 A study of sound field control technology to produce both increased area and maintained area in sound pressure." Proceedings of the Symposium on Environmental Engineering 2012.22 (2012): 14–17. http://dx.doi.org/10.1299/jsmeenv.2012.22.14.

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47

Fujii, Takanori, Michiko Hayashi, Ken'ichi Toita, and Yoshihide Yamasaki. "Effects of coenzymes Q2 and Q10 on the field potential of guinea pig olfactory cortex slices maintained in hypoxia." Neuroscience Letters 110, no. 1-2 (March 1990): 40–45. http://dx.doi.org/10.1016/0304-3940(90)90784-7.

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48

Jasmine, H. A. "Thermoconvective Stability of a Ferrofluids in Presence of Magnetic Field." Journal of Scientific Research 8, no. 3 (September 1, 2016): 273–85. http://dx.doi.org/10.3329/jsr.v8i3.27199.

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We have carried out a theoretical analysis of the linear thermoconvective stability of a ferrofluid, which is confined between two horizontal plates maintained at different constant temperatures and which is subject to an external uniform magnetic field in the vertical direction. The effects of the spin viscosity, vortex viscosity and magnetization relaxation are considered and discussed. The eigenvalue problem is solved by employing the Chebyshev pseudospectral method. It is found that the presence of magnetic field complements the buoyancy force in destabilizing the fluid at lower values of the magnetic field only and when the applied field is increased, the effect is reversed and the flow becomes more stable.

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49

Wan, Li, Yi Ping Huang, Rui Bin Zhang, Hai Hua Yu, Hang Li, Jun Wei Duan, and Hai Lang Liu. "Temperature Field Simulation of Electron Beam Cladding W Coating on Cu Substrate." Advanced Materials Research 1094 (March 2015): 331–34. http://dx.doi.org/10.4028/www.scientific.net/amr.1094.331.

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A 3D Finite Element Model of the Temperature Field for Electron Beam Cladding of Pre-Tungsten Powder on the Surface of the Copper Block was Established, According to the Actual Situation of the Electron Beam Cladding Process, Based on Finite Element Analysis Software ANSYS Workbench, Analyzed the Temperature Field Distribution of the Electron Beam Cladding Process. Temperature Field Calculation Results Showed that the Cladding Process Heating and Cooling Speed was up to 103-104°C/s, and the Surface Temperature Increased Rapidly, while the Temperature of the Substrate Maintained Low, since the Water Cooling System.

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50

Mashhoon, Bahram. "Toward Nonlocal Electrodynamics of Accelerated Systems." Universe 6, no. 12 (December 3, 2020): 229. http://dx.doi.org/10.3390/universe6120229.

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We revisit acceleration-induced nonlocal electrodynamics and the phenomenon of photon spin-rotation coupling. The kernel of the theory for the electromagnetic field tensor involves parity violation under the assumption of linearity of the field kernel in the acceleration tensor. However, we show that parity conservation can be maintained by extending the field kernel to include quadratic terms in the acceleration tensor. The field kernel must vanish in the absence of acceleration; otherwise, a general dependence of the kernel on the acceleration tensor cannot be theoretically excluded. The physical implications of the quadratic kernel are briefly discussed.

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