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Development of a scheme for the distribution of contact areas between the plate and offset cylinders

Aliyev, Eldar; Ismailova, Shebnem - In: Technology audit and production reserves 4 (2023) 1/72, pp. 6-8

Persistent link: https://www.econbiz.de/10014445554

UNDERLAYER ROUGHNESS INFLUENCE ON THE PROPERTIES OF Ag THIN FILM

ZHAO, PEI; WANG, RENG; LIU, DINGQUAN; ZHANG, FENGSHAN; … - In: Surface Review and Letters (SRL) 15 (2008) 06, pp. 787-791

The effects of the roughness of ZnS underlayer on the microstructure, optical, and electrical properties of nanometer … topography and the roughness of ZnS underlayer have been analyzed by atomic force microscopy. The sheet resistant will become … larger as the increasing of the roughness. The optical constants can be derived by fitting the transmission and reflectance …

Persistent link: https://www.econbiz.de/10005047053

STS INVESTIGATIONS OF METALLIC NANOSTRUCTURES DEPOSITED ON Bi2Te3

WINIARZ, SZYMON; BISKUPSKI, PIOTR; SZUBA, STANISLAW; … - In: Surface Review and Letters (SRL) 14 (2007) 03, pp. 357-360

Bi2Te3 has attracted attention due to its potential applications in the microfabrication of integrated thermoelectric devices. It is also interesting to study the metallization process of this compound. Metallic nanostructures were deposited by means of an electron gun evaporator in ultra high...

Persistent link: https://www.econbiz.de/10005050574

Parallel cartoons of fractal models of finance

Mandelbrot, Benoit B. - In: Annals of Finance 1 (2005) 2, pp. 179-192

Having been crafted to welcome a new scientific journal, this paper looks forward but requires no special prerequisite. The argument builds on a technical wrinkle (used earlier but explained here fully for the first time), namely, the author’s grid-bound variant of Brownian motion B(t). While...

Persistent link: https://www.econbiz.de/10005542189

Hydraulic Resistance Determination in Marsh Wetlands

Tsihrintzis, Vassilios; Madiedo, Edgar - In: Water Resources Management 14 (2000) 4, pp. 285-309

Restoration of degraded and creation of constructed wetlands require proper hydraulic design. Of particular importance is the accurate determination of flow resistancefactors and the proper use of resistance equations, somethingessential for computing basic hydraulic parameters, such as depth...

Persistent link: https://www.econbiz.de/10010794659

Exact results for the roughness of a finite size random walk

Alfi, V.; Coccetti, F.; Marotta, M.; Petri, A.; … - In: Physica A: Statistical Mechanics and its Applications 370 (2006) 1, pp. 127-131

We consider the role of finite size effects on the value of the effective Hurst exponent H. This problem is motivated by the properties of the high-frequency daily stock-prices. For a finite size random walk we derive some exact results based on Spitzer's identity. The conclusion is that finite...

Persistent link: https://www.econbiz.de/10010589262

Experimental and numerical studies of blade roughness and fouling on marine current turbine performance

Walker, Jessica M.; Flack, Karen A.; Lust, Ethan E.; … - In: Renewable Energy 66 (2014) C, pp. 257-267

The impact of blade roughness and biofouling on the performance of a two-bladed horizontal axis marine current turbine …

Persistent link: https://www.econbiz.de/10011044884

Analysis of the polymer composite bipolar plate properties on the performance of PEMFC (polymer electrolyte membrane fuel cells) by RSM (response surface methodology)

San, Boyaci; Gül, Fatma; Isik-Gulsac, Isil; Okur, Osman - In: Energy 55 (2013) C, pp. 1067-1075

surface contact angle and roughness properties of bipolar plate are the main factors affecting water management in a fuel cell … and PEMFC performance. The effects of the contact angle and roughness of polymer composite bipolar plate and hydrogen flow … angle and roughness. We observed that the power density of the fuel cell increases with the increase in the hydrogen flow …

Persistent link: https://www.econbiz.de/10011054079

Assessment of the wake effect on the energy production of onshore wind farms using GIS

Grassi, Stefano; Junghans, Sven; Raubal, Martin - In: Applied Energy 136 (2014) C, pp. 827-837

. The wind turbines are represented by points including information about the roughness of the surrounding terrain …. Roughness is calculated within a GIS process that models the variation of the land cover over the year around the wind turbine …

Persistent link: https://www.econbiz.de/10011076481

Surface roughness effect on the metallic bipolar plates of a proton exchange membrane fuel cell

Lin, Chien-Hung - In: Applied Energy 104 (2013) C, pp. 898-904

lifetime of cells are still important issues. The effect of surface roughness on metallic bipolar plate is discussed in this … paper. Various roughness on the bulk surface are obtained by the sandblasting method. The grain sizes of sand are selected … as 50, 100 and 200μm. The Ac impedance experiment results show that the bipolar plate roughness and carbon paper porosity …

Persistent link: https://www.econbiz.de/10011040505