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Journal articles on the topic 'Hydroplán'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Qin, Yu, Xiao Liang, and Jia Ning Zhang. "Numerical Simulation Calculation of Hydroplane Direct Route Motion Based on FLUENT." Advanced Materials Research 569 (September 2012): 368–75. http://dx.doi.org/10.4028/www.scientific.net/amr.569.368.

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Aiming at hydrodynamic performance prediction for hydroplane motion, numerical simulation calculation for direct route motion of a hydroplane was carried out under FLUENT software platform by using VOF method and RNG k-ε model and solving Navier-Stokes equation. Evolution of ship resistance was obtained as the velocity change, and flow field situation and dynamic pressure variation of hydroplane hull bottom were reflected intuitively. By comparing the results of FLUENT calculation and ship model experiment and theoretical estimation, analyzing, especially wake current, it was verified that numerical simulation calculation of hydroplane direct route motion and hydrodynamic performance prediction based on FLUENT are feasible and precise enough.

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2

Lopes, Marília Barcelos Souza, Taynar Coelho de Oliveira Tavares, Danilo Alves Veloso, Niléia Cristina da Silva, and Rodrigo Ribeiro Fidelis. "Cowpea bean production under water stress using hydrogels." Pesquisa Agropecuária Tropical 47, no. 1 (March 2017): 87–92. http://dx.doi.org/10.1590/1983-40632016v4743398.

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ABSTRACT The population increase and the need of intensifying food production, coupled with the scarcity of water resources, have led to the search of alternatives that reduce consumption and optimize the water use during cultivation. In this context, hydrogels become a strategy in agricultural management, due to their water retention capacity in the soil and availability to plants. This study aimed at evaluating the efficiency of hydrogels on the development and production of cowpea bean ('Sempre-verde' cultivar) under water stress, in a greenhouse. The experiment was performed in a randomized block design, with five replications, in a 4 x 5 factorial scheme, consisting of four types of hydrogel (Hydroplan-EB HyA, with granulometry of 1-3 mm; Hydroplan-EB HyB, with granulometry of 0.5-1 mm; Hydroplan-EB HyC, with granulometry < 0.5 mm; Polim-Agri, with granulometry of 1-0.5 mm) and five concentrations (0 g pot-1; 1.5 g pot-1; 3 g pot-1; 4.5 g pot-1; 6 g pot-1). The following traits were evaluated: number of pods per plant, number of grains per pod and grain yield. The highest concentration (6 g pot-1) resulted in a higher number of pods and yield for all the hydrogels, especially for HyC and Polim-Agro, which presented 7.4 pods plant-1 and 7.0 pods plant-1, with yield of 15.43 g plant-1 and 16.68 g plant-1, respectively. The use of hydrogel shows to be efficient for reducing yield losses under water stress.

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3

Virliani, Putri, I. Ketut Suastika, and Wasis Dwi Aryawan. "ANALISA NUMERIK OLAH GERAK KAPAL SELAM DENGAN VARIASI BENTUK AFTER BODY." Jurnal Kelautan Nasional 12, no. 2 (August 6, 2017): 73. http://dx.doi.org/10.15578/jkn.v12i2.5703.

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Dalam pengoperasian kapal selam, olah gerak (maneuver) yang baik diperlukan pada saat melakukan serangan maupun menghindar dari serangan musuh. Salah satu komponen teknologi kapal selam yang perlu dikembangkan untuk mencapai maneuver yang baik adalah komponen hydroplane yang tersusun pada bagian after body kapal selam. Kapal selam itu dapat melakukan olah gerak vertikal mapun horizontal dengan menggunakan sistem kendali gerak (hydroplane). Ukuran geometri dan bentuk lambung dari kapal selam mempengaruhi karakteristik maneuver kapal selam. Untuk mencapai karakteristik maneuver yang diinginkan diperlukan perancangan ulang sistem kendali hydroplane. Penelitian ini diawali dengan membuat variasi bentuk after body kapal selam dan memprediksi lintasan gerak melingkar kapal selam. Perhitungan gaya hidrodinamika dan momen dilakukan secara numerik dengan menggunakan software Computational Fluid Dynamic (CFD-CFX). Kemudian dengan menggunakan software MATLAB , data-data hasil dari perhitungan CFD dapat dimasukkan ke dalam persamaan untuk diturunkan menjadi kurva yang menunjukkan lintasan gerak melingkar kapal selam.

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4

Fidelis, Rodrigo Ribeiro, Guilherme Sousa Da Silva, Wagner Augusto Rauber, Larissa Urzêdo Rodrigues, Vitor L. Nascimento, and Susana Cristine Siebeneichler. "Biochemical quality of cowpea beans grown under water-deficit maintained with hydrogel." Revista de Ciencias Agrícolas 37, no. 1 (June 20, 2020): 38–50. http://dx.doi.org/10.22267/rcia.203701.123.

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Investigations related to the effects of the hydrogel use in a water-deficit conditions on the biochemical composition of the harvested products are scarce. The aim of this study was to verify the influence of hydrogel on the biochemical response of cowpea beans produced under water-deficit in southern Tocantins. The experiment was a randomized complete block design with four replications. The treatments were obtained in a 2x5 factorial scheme, being: two sources of hydrogel (Hydroplan-EB HyC and Polim-Agri PP) and five concentrations (0, 5, 10, 15, and 20kg ha-1). After harvesting, the grains of cowpea, BRS Vinagre cultivar, were ground and chemically analyzed. The oil content of the seeds agreed with the reference values. The use of Polim-Agri PP promoted the best levels of amino acids (0.38mg g-1) and proteins (243.22mg g-1) of the grains. The carbohydrate content of them (Ȳ= 81.44mg g-1) was better using Hydroplan-EB HyC, regardless of the concentration applied. The application of 6.28kg ha-1 of Polim-Agri PP provided the highest starch content (842g mg-1). The use of hydrogel improves the biochemical quality of cowpea beans produced under water deficit in southern Tocantins.

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5

Bessière, Claude. "Hausses submersibles et fusibles Hydroplus." La Houille Blanche, no. 2-3 (April 1992): 185–89. http://dx.doi.org/10.1051/lhb/1992017.

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6

Bayón, L., J. M. Grau, M. M. Ruiz, and P. M. Suárez. "Optimization of a Pumped-Storage Fixed-Head Hydroplant: The Bang-Singular-Bang Solution." Mathematical Problems in Engineering 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/561592.

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We consider the problem of the optimization of the functioning of a pumped-storage hydroplant. The problem can be mathematically formulated as an optimal control problem, and when the considered hydromodel is of the fixed-head type, an added complication arises: the solution is of the bangsingular-bang type. In this paper, we propose a simple and efficient optimization algorithm to find the solution.

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7

Huber, P., J. Debus, and A. Lorenz. "Laseroptisches Hydrophon zur Messung von gepulstem hochenergetischem Ultraschall." Zeitschrift für Medizinische Physik 2, no. 1 (1992): 52–56. http://dx.doi.org/10.1016/s0939-3889(15)70630-6.

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8

Matveev, Konstantin I. "Modeling of longitudinal motions of a hydroplane boat." Ocean Engineering 42 (March 2012): 1–6. http://dx.doi.org/10.1016/j.oceaneng.2012.01.009.

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9

AZUMA, Ryoukei, Tadao ITO, Hideaki HANDA, Tetsuya HIRAISHI, Takahiro SUGANO, and Yasunori NIHEI. "HYDRAULIC EXPERIMENTS ON RESPONSE CHARACTERISTICS OF HYDROPLANE TSUNAMI BARRIER." Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71, no. 2 (2015): I_1087—I_1092. http://dx.doi.org/10.2208/kaigan.71.i_1087.

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10

Dolunts, G. V., L. B. Maslov, and M. A. Zhmaylo. "The hydroplane body development of design and topological optimization." IOP Conference Series: Materials Science and Engineering 1129, no. 1 (April 1, 2021): 012015. http://dx.doi.org/10.1088/1757-899x/1129/1/012015.

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11

Žlabur, Jana Šic, Nevena Opačić, Ivanka Žutić, Sandra Voća, Magdalena Poštek, Sanja Radman, Božidar Benko, and Sanja Fabek Uher. "Valorization of Nutritional Potential and Specialized Metabolites of Basil Cultivars Depending on Cultivation Method." Agronomy 11, no. 6 (May 24, 2021): 1048. http://dx.doi.org/10.3390/agronomy11061048.

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In addition to its distinct aroma and flavor, because of which it is often used in various foods and dishes, basil has recently become increasingly popular because of its rich and beneficial nutritional composition. The presence of several varieties and cultivars makes it a species rich in many specific phytochemicals, which is why it is increasingly used in phytotherapy. The aim of this study was to analyze and valorize the nutrient composition and morphological characteristics of three different basil cultivars (‘Genovese’, ‘Dark Opal’, ‘Minimum’) under two growing methods, conventional in open field and floating hydropon. The results of morphological and chemical characteristics showed a significant influence of cultivar in both growing methods. The cultivar ‘Genovese’ obtained the highest yield in floating hydropon (4.02 kg/m2), followed by cultivars ‘Minimum’ and ‘Dark Opal’ (2.03 and 1.83 kg/m2, respectively), which were 31%, 97%, and 16% higher compared to soil cultivation. Based on the analyzed physicochemical parameters, the highest values of dry matter, total acids, vitamin C, total phenols, and antioxidant capacity were generally determined in all analyzes basil cultivars grown in the open field compared to those grown in floating. Significantly higher values of the analyzed pigment compounds were found for all hydroponically grown basil cultivars.

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12

GOTOH, Hitoshi, Hiroyuki IKARI, Koji TONOMO, Takahiro SUGANO, Ryoukei AZUMA, Tadao ITO, and Yasuyuki SUGAWARA. "NUMERICAL SIMULATION ON HYDROPLANE TSUNAMI BARRIER BY ACCURATE PARTICLE METHOD." Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71, no. 2 (2015): I_1051—I_1056. http://dx.doi.org/10.2208/kaigan.71.i_1051.

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13

Nakai, Yoshiaki, Haruhiko Masutani, Makoto Moriguchi, Kazuhiro Matsunaga, and Masahiko Sugita. "The Influence of Noise Exposure on Endolymphatic HydropsAn Experimental Study." Acta Oto-Laryngologica 111, sup486 (January 1991): 7–12. http://dx.doi.org/10.3109/00016489109134976.

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14

Wapet, Daniel Eutyche Mbadjoun, Salomé Ndjakomo Essiane, René Wamkeue, and Patrick Juvet Gnetchejo. "Hydropower Production Optimization from Inflow: Case Study of Songloulou Hydroplant." Journal of Power and Energy Engineering 08, no. 08 (2020): 37–52. http://dx.doi.org/10.4236/jpee.2020.88003.

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15

AZUMA, Ryoukei, Tadao ITO, Hideaki HANDA, Toshihiro UEKI, Tetsuya HIRAISHI, Chihiro SEKIYA, and Takahiro SUGANO. "FULL-SCALE MODEL EXPERIMENTS ON RESPONSE CHARACTERISTICS OF HYDROPLANE TSUNAMI BARRIER." Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72, no. 2 (2016): I_1099—I_1104. http://dx.doi.org/10.2208/kaigan.72.i_1099.

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16

HONHART, FREDERICK L. "From Sport to Business: Evolution of Unlimited Hydroplane Racing 1946-60." Journal of Popular Culture 43, no. 1 (February 2010): 120–36. http://dx.doi.org/10.1111/j.1540-5931.2010.00733.x.

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17

Li, Caifang, Yichun Wu, Hao Liang, and Miao Li. "Discussion on joint operation of wind farm and pumped-storage hydroplant." IOP Conference Series: Earth and Environmental Science 100 (December 2017): 012075. http://dx.doi.org/10.1088/1755-1315/100/1/012075.

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18

Honhart, Frederick L. "Speed and Spray: Technology, Its Implication, and Unlimited Hydroplane Racing 1946-1988." Journal of American Culture 13, no. 1 (March 1990): 19–29. http://dx.doi.org/10.1111/j.1542-734x.1990.1301_19.x.

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19

Regent, Aleksandar, Neven Szabo, and Mladen Vuković. "On the economy of aerial firefighting using Canadair CL-415." Sigurnost 60, no. 1 (March 23, 2018): 49–56. http://dx.doi.org/10.31306/s.60.1.5.

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SUMMARY: Innovations introduced in firefighting practice should help maximise the cost/benefit relation. One of the largest costs of firefighting in Croatia is the cost of aerial firefighting. The majority of the costs are incurred by the procurement, maintenance and actual operation of the hydroplane Bombardier CL-415. Published data indicate that these costs are significantly underestimated in Croatia. The paper purports to show the actual costs of wildfire fighting using these planes. An additional cost, if class A foam is used, amounts to 12-13% of total costs. One of the conclusions is that in order to increase the total efficiency of fire extinguishing and cut the cost would be to use Class A foam, since the extra cost is, most likely, significantly smaller than the proven advantages of this agent.

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20

AZUMA, Ryoukei, Tadao ITO, Hideaki Handa, Ryo Yamashiki, Tetsuya HIRAISHI, and Takahiro Sugano. "Performance Evaluation of Hydroplane Tsunami Barrier by Means of Small Hydraulic Model Experiments." Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 70, no. 2 (2014): I_951—I_955. http://dx.doi.org/10.2208/kaigan.70.i_951.

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21

AZUMA, Ryoukei, Tadao ITO, Hideaki HANDA, Tetsuya HIRAISHI, and Takahiro SUGANO. "WAVE REDUCTION EFFECT OF HYDROPLANE TSUNAMI BARRIER IN TERMS OF HYDRAULIC MODEL EXPERIMENTS." Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71, no. 2 (2015): I_1081—I_1086. http://dx.doi.org/10.2208/kaigan.71.i_1081.

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22

Lopes, Marilia Barcelos Souza, Helio Bandeira Barros, Aloísio Freitas Chagas Júnior, Manoel Mota dos Santos, Niléia Cristina da Silva, and Rodrigo Ribeiro Fidelis. "Water-retaining polymer as a soil conditioner in cowpea under water stress." Comunicata Scientiae 9, no. 4 (January 4, 2019): 680–86. http://dx.doi.org/10.14295/cs.v9i4.2709.

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Cowpea is no longer a family-oriented crop. Today it is cultivated by medium and large farmers in the North and Northeast, due to their adaptation to edaphoclimatic conditions. The objective of this work was to evaluate the efficiency of hydrogel utilization in the retention and availability of water for the development and production of Cowpea beans when subjected to water stress. The experiment was conducted in a randomized block design with four replications in a 5 x 2 factorial scheme, with five concentrations (0, 5, 10, 15 and 20 kg ha-1) and two sources of hydrogels (Hydroplan-EB HyC and Polim-Agri). The cowpea cultivar used was BRS Vinager. The following characteristics were evaluated: number of pods per plant; Number of grains per pod; Pod length: one hundred grain mass and grain yield. The data were submitted to analysis of variance, with the application of the test F. Regression analysis was performed with the help of the SISVAR computer system. The use of hydrogel was an alternative to reduce losses resulting from the action of water stress; the concentrations of hydrogels between 15 and 18 kg ha-1 resulted in higher number of pods per plant, number of grains per pod, the mass of one hundred grains and yields of grains.

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23

Lamond, Bernard F., and Abdeslem Boukhtouta. "Neural Approximation for the Optimal Control of a Hydroplant with Random Inflows and Concave Revenues." Journal of Energy Engineering 131, no. 1 (April 2005): 72–95. http://dx.doi.org/10.1061/(asce)0733-9402(2005)131:1(72).

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24

Grogger, H., and M. Weiss. "Calculation of the Three-Dimensional Free Surface Flow Around an Automobile Tire." Tire Science and Technology 24, no. 1 (January 1, 1996): 39–49. http://dx.doi.org/10.2346/1.2137511.

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Abstract The 3D flow around a 195/65R15 automobile tire is calculated. To describe the free surface behavior with the usual conservation equations for mass and momentum, an additional equation for the water mass fraction is solved. For modeling the effects of turbulence, the well-known k,ε-model is used. The resulting fluid mechanics equation system is solved by a finite volume method. A finite element calculation considering inflation pressure and tire deflection gives the surface for the flow calculation. The goal is to determine the lift force of the tire at a certain velocity to predict the tendency of the tire to hydroplane. For a slick tire, the calculated pressure distribution in the water is presented. The lift and drag forces are evaluated from the pressure acting directly on the tire surface. The calculation is performed at three different velocities, 30, 60, and 90 km/h. A comparison with experimental data shows good agreement regarding the pressure distribution on the road in front of the tire.

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25

Tambunan, Indra H., Patar E. Sitorus, Hendra A. Putra, Jin Hwan Ko, Hoon Cheol Park, and Tae Sam Kang. "Pitch Oscillation Control of Hydroplane in Dual System of Lab-scale Flapping Type Tidal Energy Harvester." Journal of Instrumentation, Automation and Systems 1, no. 3 (January 8, 2016): 91–96. http://dx.doi.org/10.21535/jias.v1i3.175.

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26

David, Jesse, Robert Bauer, and Mae Seto. "Coupled Hydroplane and Variable Ballast Control System for Autonomous Underwater Vehicle Altitude-Keeping to Variable Seabed." IEEE Journal of Oceanic Engineering 43, no. 4 (October 2018): 873–87. http://dx.doi.org/10.1109/joe.2017.2771747.

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27

Start, Marc R., Jeong Kim, and William D. Berg. "Potential Safety Cost-Effectiveness of Treating Rutted Pavements." Transportation Research Record: Journal of the Transportation Research Board 1629, no. 1 (January 1998): 208–13. http://dx.doi.org/10.3141/1629-23.

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Pavement rutting is a problem that has unknown consequences from a safety-based point of view. It is assumed that the wheelpath fills with water in wet-weather situations, thus increasing the potential for a vehicle to hydroplane. A study was conducted to quantify how pavement rutting affects accident rates and to evaluate possible safety-based guidelines for the treatment of pavement rutting. Rut depth, traffic volumes, and accident databases maintained by the Wisconsin Department of Transportation for undivided rural highways were then analyzed to identify statistical trends and relationships. Accidents were categorized as rut-related if the prevailing conditions could be potentially associated with the occurrence of hydroplaning. Rut depth measurements were average values for both directions of 1.8-km (1.1-mi) segments and represent the average elevation difference between the tire paths and the high point between them. The results of the statistical analyses indicated that the defined rut-related accident rate begins to increase at a significantly greater rate as rut depths exceed 7.6 mm (0.3 in.). The cost-effectiveness of potential accident reductions associated with reductions in the relative amount of rutted pavement was also evaluated.

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28

GOTOH, Hitoshi, Hiroyuki IKARI, Koji TONOMO, Tadao ITO, and Yasuyuki SUGAWARA. "ON APPLICABILITY OF ACCURATE PARTICLE METHOD TO PREDICTION OF TENSILE FORCE ACTING ON CONTROL BELT OF HYDROPLANE TSUNAMI BARRIER." Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72, no. 2 (2016): I_1093—I_1098. http://dx.doi.org/10.2208/kaigan.72.i_1093.

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29

Mussi, Fabricio Baron, and Ubirata Tortato. "Cooperation, the Crowding Out Effect and the Role Of Incentives in the Case of Sustainable Hydroplant Project in Brazil." Management:Journal of Sustainable Business and Management Solutions in Emerging Economies 23, no. 2 (September 5, 2018): 71. http://dx.doi.org/10.7595/management.fon.2018.0011.

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Research Question: This paper sought to present a proposal for the analysis of the cooperation between a hydroelectric power plant and the fisheries community. Motivation: The use of economic experiments on the sustainability theme has been employed by adapting public goods games to the different realities faced by the players. For this research, focused on the environmental preservation, preferring to contribute/not to contribute to their preservation consists of public goods dilemmas. This subject also constitutes a research opportunity, since in the preliminary literature review few studies addressed concomitantly the sustainability question related to hydroelectric plants and the cooperation between them and a group of local stakeholders. Idea: The core idea of this paper was to bring a proposal of association between the behavioural economics and crowding out theory to the analysis of actions envisaging sustainability, which demand the cooperation between a hydroelectric power plant and the fisheries community that make a living out of its reservoir. Data: The research was conducted assessing documents such as Itaipu´s annual sustainability reports and other documents between the plant and its stakeholders, in the environmental area, and in the form of contracts and cooperation agreements. Next, eight personal interviews were conducted with managers involved in the Sustainability Programme. Tools: With these information, the suggested public goods game was adapted from Fehr and Gachter (2000), and Sefton, Shupp and Walker (2007), and – for the present proposal of experiment – was named ‘reservoir game’, as the public goods in this case is Itaipu´s plant reservoir. Findings: This study can help in the acquisition of relevant information about the applicability and efficiency of punishment and reward mechanisms related to cooperation, either in support of future negotiations and agreements or in bargaining situations when groups present their demands. One can only hope to have also contributed to the improvement of management of contractual agreements between corporations and local stakeholders in projects targeting sustainability, to reduce any transaction costs, and minimize the possibilities for conflict and disagreement between partners. Contribution: This paper expands existing research related to cooperation between a power plant and its local stakeholders.

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30

Hardisty, Jack. "Assessment of Tidal Current Resources: Case Studies of Estuarine and Coastal Sites." Energy & Environment 18, no. 2 (March 2007): 233–49. http://dx.doi.org/10.1177/0958305x0701800204.

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The potential for tidal stream power in North Western European waters is large and a number of axial flow, vertical rotor and oscillating hydroplane schemes are approaching full scale design and construction. The accurate determination of the available or potential fluid power is being addressed by, in particular, the regulatory bodies as they move towards the establishment of industry standards and the identification and designation of licensing areas. A generic formulation is developed here which utilises Admiralty tidal diamond data and the arithmetic summation of harmonics due to the lunar semi-diurnal, the solar semi-diurnal and (for shallow water and estuarine sites) the lunar quarter diurnal components. Numerical and sensitivity analyses show that the long term potential power is sensitive to the amplitudes of the harmonics but insensitive to the frequencies and phase differences. The results are applied to estuarine sites off Immingham and at Hull Roads in the Humber and to a shallow water, coastal site off Weston-super-Mare in the Bristol Channel. The results indicate that the shore side energy output from a small scale, meso-generation, 100 m2 capture area device with 60% efficiency varies from about 600 MWha–1 in the Bristol Channel to about 900 MWha–1 in the Humber where the ebb dominated tide flows for longer durations and at slightly higher speeds.

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31

Shams, Alireza, Wayne A. Sarasua, Afshin Famili, William J. Davis, Jennifer H. Ogle, Leonildo Cassule, and Adika Mammadrahimli. "Highway Cross-Slope Measurement using Mobile LiDAR." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 39 (April 18, 2018): 88–97. http://dx.doi.org/10.1177/0361198118756371.

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Ensuring adequate pavement cross-slope on highways can improve driver safety by reducing the potential for ponding to occur or vehicles to hydroplane. Mobile laser scanning (MLS) systems provide a rapid, continuous, and cost-effective means of collecting accurate 3D coordinate data along a corridor in the form of a point cloud. This study provides an evaluation of MLS systems in terms of the accuracy and precision of collected cross-slope data and documentation of procedures needed to calibrate, collect, and process this data. Mobile light detection and ranging (LiDAR) data were collected by five different vendors on three roadway sections. The results indicate the difference between ground control adjusted and unadjusted LiDAR derived cross-slopes, and field surveying measurements less than 0.19% at a 95% confidence level. The unadjusted LiDAR data incorporated corrections from an integrated inertial measurement unit and high-accuracy real-time kinematic GPS, however it was not post-processed adjusted with ground control points. This level of accuracy meets suggested cross-slope accuracies for mobile measurements (±0.2%) and demonstrates that mobile LiDAR is a reliable method for cross-slope verification. Performing cross-slope verification can ensure existing pavement meets minimum cross-slope requirements, and conversely is useful in identifying roadway sections that do not meet minimum standards, which is more desirable than through crash reconnaissance where hydroplaning was evident. Adoption of MLS would enable the South Carolina Department of Transportation (SCDOT) to address cross-slope issues through efficient and accurate data collection methods.

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32

Krupa-Małkiewicz, Marcelina, and Mario Calomme. "Actisil application affects growth, flowering, and biochemical parameters in petunia in vitro and greenhouse." Plant Cell, Tissue and Organ Culture (PCTOC) 146, no. 3 (April 20, 2021): 449–59. http://dx.doi.org/10.1007/s11240-021-02078-3.

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AbstractMineral nutrients are necessary for the growth and development of plants. Previous studies have concentrated mainly on silicon-accumulating plants, while less work has been conducted on non-accumulating plants such as Petunia × atkinsiana D. Don. In this study, we investigated the responses of morphological (plant height, root length, fresh and dry weight, no. of flowers) and biochemical (proline, malondialdehyde MDA, catalase CAT activity, total chlorophylls, carotenoids, total polyphenol, and NO3) traits of petunia to external application of commercial silicon solution (Hydroplus™ Actisil) after 5 weeks of in vitro culture and 6 weeks under greenhouse condition. Actisil was supplemented into the MS medium (in vitro) at concentrations of 0 (control), 50, 100, 200, and 500 mg L−1, or supplied via irrigations at a concentration of 0 (control) and 200 mg L−1 in one, two, and three applications under greenhouse conditions. The addition of silicon to the MS medium decreased plant height (22–41% of control) and root length (53–70% of control). In contrast, in greenhouse-grown petunia irrigation of silicon increased plant height (145% of control ) and root length (176% of control). Petunias treated with Actisil had greener leaves compared to the control. This was also confirmed by higher concentrations of chlorophyll. Conversely, increased concentrations of proline, MDA, and total polyphenol and higher CAT activities may indicate that silicon provokes a stress response of the in vitro plants. Actisil treatment in the concentration of 200 mg L−1 was found to positively affect the growth and flowering of the greenhouse-grown petunia.

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33

Riccioni, L., A. Haegi, and M. Valvassori. "First Report of Vascular Wilt Caused by Fusarium redolens on Lentil in Italy." Plant Disease 92, no. 7 (July 2008): 1132. http://dx.doi.org/10.1094/pdis-92-7-1132c.

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Lentil (Lens culinaris Medik.) is a traditional crop in Sicily, Italy. Near Villalba (Caltanissetta), a local lentil landrace, “Lenticchia di Villalba”, is commonly grown. From 2002 to 2004, wilt was observed in five lentil fields (≈1 ha each) at rates from 5 to 20%. Affected plants were yellow and stunted with discoloration in the vascular tissue of stems and crowns. Pieces of brown vascular tissue from stems were disinfested in 2% sodium hypochlorite for 2 min, rinsed with sterile distilled water, placed on potato dextrose agar, and incubated at 23°C. Isolates with morphological characteristics of Fusarium oxysporum Schlecht.:Fr. (2) were consistently recovered from affected plants. For molecular identification of five isolates, the rDNA internal transcribed spacer (ITS) region and a portion of the elongation factor EF-1α were sequenced using ITS5/4 and EF1/2 primers, respectively (1). Two sequences of the ITS region were obtained: a 468-bp sequence from isolates ER1259, ER1260, and ER1275 (submitted as GenBank Accession No. EU159118) and a 483-bp sequence from isolates ER1274 and ER1276 (submitted as GenBank Accession No. EU281661). The two sequences shared 93% similarity. A sequence homology search using the NCBI BLAST program revealed that the first sequence had 100% homology with the ITS sequences of more than 50 F. oxysporum isolates of various formae speciales in GenBank and the second shared 100% homology with the ITS sequences of five isolates of F. redolens Wollenw. (e.g., GenBank Accession No. X94169 of the strain CBS 360.87). Amplification of the EF-1α produced a sequence from isolates ER1274 and ER1276 (submitted as GenBank Accession No. EU281660) with 99 to 100% homology to sequences of F. redolens and a sequence from strains ER1259, ER1275, and ER1260 (submitted as GenBank Accession No. EU281659) with 100% homology to that of more than 50 F. oxysporum strains in GenBank. Although F. redolens and F. oxysporum are morphologically similar, recent molecular studies have shown that they are distinct and phylogenetically distant species (3). On the basis of genetic sequences, isolates ER1274 and ER1276 were identified as F. redolens. These isolates were evaluated for pathogenicity on lentil. For each isolate, 10 2-week-old seedlings of “Lenticchia di Villalba” were inoculated by submerging roots in a suspension of 2.5 × 106 conidia/ml for 10 min. Plants were put into separate tubes containing 70 ml of a nutritional liquid medium (7 ml of HydroPlus Olikani per liter; Yara, Nanterre, France) and incubated in a growth chamber at 20°C with 12 h of light per day. Seedlings dipped in sterile water served as the control treatment. The pathogenicity test was repeated twice. Inoculated seedlings started to wilt 1 week after inoculation and developed root rot and vascular discoloration. After 2 weeks, 70% of the inoculated plants were affected by both isolates and 40 and 10% died when inoculated with ER1274 and ER1276 isolates, respectively. F. redolens was consistently reisolated from the stems of wilted plants. Noninoculated plants remained healthy. Currently, only F. oxysporum f. sp. lentis Vasud. and Sriniv. has been reported as the cause of Fusarium wilt of lentil. To our knowledge, this is the first report of F. redolens as a pathogen on lentil. References: (1) R. P. Baayen et al. Phytopathology 91:1037, 2001. (2) P. E. Nelson et al. Fusarium Species: An Illustrated Manual for Identification. The Pennsylvania State University Press, University Park, 1983. (3) K. O'Donnell et al. Mycologia 90:465, 1998.

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Virliani, Putri, I. Ketut Suastika, and Wasis Dwi Aryawan. "ANALISA NUMERIK OLAH GERAK KAPAL SELAM DENGAN VARIASI BENTUK AFTER BODY." Jurnal Kelautan Nasional 12, no. 2 (March 20, 2018). http://dx.doi.org/10.15578/jkn.v12i2.6709.

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Dalam pengoperasian kapal selam, olah gerak (maneuver) yang baik diperlukan pada saat melakukan serangan maupun menghindar dari serangan musuh. Salah satu komponen teknologi kapal selam yang perlu dikembangkan untuk mencapai maneuver yang baik adalah komponen hydroplane yang tersusun pada bagian after body kapal selam. Kapal selam itu dapat melakukan olah gerak vertikal mapun horizontal dengan menggunakan sistem kendali gerak (hydroplane). Ukuran geometri dan bentuk lambung dari kapal selam mempengaruhi karakteristik maneuver kapal selam. Untuk mencapai karakteristik maneuver yang diinginkan diperlukan perancangan ulang sistem kendali hydroplane. Penelitian ini diawali dengan membuat variasi bentuk after body kapal selam dan memprediksi lintasan gerak melingkar kapal selam. Perhitungan gaya hidrodinamika dan momen dilakukan secara numerik dengan menggunakan software Computational Fluid Dynamic (CFD-CFX). Kemudian dengan menggunakan software MATLAB , data-data hasil dari perhitungan CFD dapat dimasukkan ke dalam persamaan untuk diturunkan menjadi kurva yang menunjukkan lintasan gerak melingkar kapal selam.

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"Specifications of the Cultivation of Tomato in Hydropon Greenhouses." International Journal of Recent Technology and Engineering 8, no. 2S11 (November 2, 2019): 3795–800. http://dx.doi.org/10.35940/ijrte.b1495.0982s1119.

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This scientific article is called “ Feature stories from the history of the Nurata oasis” and it uses the results of ethnographic field studies from 1999 to 2013, archival documents and scientific literature on this topic, as well as historical and ethnographic comparative information on the basis of dissertations and manuals. The article provides interesting information on the indigenous tribes of the Nurata oasis – Oguz-Turkmen, their assimilation over many centuries and their transformation into Uzbek-Turkmen, as well as on other ethnic groups.

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"Combinational effect of Hydroplane and Alkaline Agent on Remaining Particle Reduction for Silicon Wafer Polishing." ECS Meeting Abstracts, 2012. http://dx.doi.org/10.1149/ma2012-02/29/2508.

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Yoshida, Takashi, Kuniko Takemoto, Yoshiko Sakata, Tomoaki Matsuzaki, Yuya Koito, Shimpei Yamashita, Isao Hara, Hidefumi Kinoshita, and Tadashi Matsuda. "A randomized clinical trial evaluating the short-term results of ureteral stent encrustation in urolithiasis patients undergoing ureteroscopy: micro-computed tomography evaluation." Scientific Reports 11, no. 1 (May 14, 2021). http://dx.doi.org/10.1038/s41598-021-89808-x.

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AbstractAlthough many ureteral stents are commercially available, the actuality of encrustation is yet to be elucidated in humans. This study compared the Tria Ureteral Stent with PercuShield and the Polaris Ultra Ureteral Stent with HydroPlus Coating for short-term encrustation formation. Eighty-four patients, who required ureteral stent placement after ureteroscopy, were randomized into two stent groups. After stent removal on postoperative day 14, the encrustation volume on the stent surface was measured by micro-computed tomography. The primary outcome was the inner luminal encrustation volume. Secondary outcomes were encrustation volume on the outer or total surfaces and occurrence of adverse events. Clinical factors related to encrustation were also assessed as a post-hoc analysis. Finally, of the 82 patients analyzed, 75 (91.5%) had encrustation in the inner lumen of the stent. The difference in median inner encrustation volume between the Tria and Polaris Ultra stents was comparable (0.56 vs. 0.37 mm3, P = 0.183). There was no difference observed in the encrustation volume on the outer/total surfaces and stent-related adverse events. In both ureteral stents, the shaft body showed significant inner luminal encrustation compared to the proximal or distal loop (all, P < 0.05). Dyslipidemia (P = 0.027), elevated urine pH (P = 0.046), and crystalluria (P = 0.010) were associated with encrustation formation. The Tria and Polaris Ultra stents had similar efficacy for preventing encrustation in the short-term. Further studies are required to compare their long-term patency.

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Morabito, M. G. "RE-ANALYSIS OF WILLIAM FROUDE’S STUDIES OF PLANING CRAFT." International Journal of Small Craft Technology Vol 157 Part B1 2015 157, B1 (June 1, 2015). http://dx.doi.org/10.3940/rina.ijsct.2015.b1.173.

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One of William Froude’s lesser-known contributions to the field of Naval Architecture was in conducting some of the earliest studies on planing craft. Froude’s research was prompted by the idea of an inventor, Reverend C.M. Ramus who in 1872 proposed a high-speed ship concept using a flat-bottomed, stepped planing hull. Ramus later suggested the use of this hullform for rocket-propelled rams. Froude conducted towing tests on a model of the Ramus hull, as well as on a model three-point hydroplane concept of his own design. He also derived a solution for the optimum trim angle and minimum resistance of planing craft, using his recently developed formulae for estimating frictional resistance on flat plates and lift forces on submerged plates. Froude’s study demonstrated that Ramus’s ideas were not feasible at the time and the study received very little attention. It was not until the advent of lightweight internal combustion engines, thirty years later, that planing hulls became a reality. In the current paper, the Ramus tests are re-analysed and the data are put into a modern format. Comparisons are provided between the Ramus hull, Series 62 and a planing flat plate. The Ramus concept is shown to have had significantly more drag than would be expected from a planing hull. New model tests explore the effects of the rounded stern of the Ramus hull, and show that this feature significantly increases the resistance. Froude’s derivation of the minimum resistance of planing craft is discussed and contrasted with modern methods for prismatic planing hull resistance prediction.

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