2,675 research outputs found
Use of clicks resembling those of the Atlantic bottlenose dolphin (Tursiops truncatus) with biased pulse summation sonar (BiaPSS) to improve target discrimination in bubbly water
No full textDirect numerical simulation of turbulent Couette-Poiseuille flow with zero skin friction
No full textThe near-wall scaling of mean velocity U(y) is addressed for the case of zero skin friction on one wall of a fully turbulent channel flow. The present DNS results can be added to the evidence in support of the conjecture that U is proportional to √yw in the region just above the wall at which the mean shear dU/dy = 0
Culicoides baniwa Felippe-Bauer 2009
No full textCulicoides baniwa Felippe-Bauer, 2009 (Figs. 1–10) Culicoides baniwa Felippe-Bauer, (in Felippe-Bauer et al., 2009): 852 (female; Brazil; figs. antenna, palpus, legs, spermathecae, wing photo; in key; distribution). Female diagnosis: Only species in the hylas group of the subgenus Hoffmania Fox with a long proboscis (P/H ratio 1.48), double pale spots in r 3, with one crossing the second radial cell and other in distal portion of r 3, absence of the pale spot in front of the base of M 1, mid femur dark to tip and a pale fifth palpal segment. Male diagnosis: Similar to female with usual sexual differences.The male genitalia of C. baniwa is notched posteromedially, apicolateral processes absent, posterior margin gonostylus pale, broad basally, abruptly tapering to slender apex. Parameres broadly fused at basal half. Male description: Antennal pedicel dark brown; flagellomeres pale brown, basal portion of flagellomeres pale, distal portion darker. Sensilla coeloconica on each of flagellomeres 1–13, two on 1, one on each of 2–13. Palpus (Figs. 1–2) brown except first, fifth segments entirely pale; third, fourth segments pale basally, P.R. 3.60. P/H ratio: 0.64–0.68 (0.67, n= 4) Wing length 1.25–1.33 mm (1.29, n= 5), breadth 0.45–0.50 (0.48, n= 5) mm, costal ratio 0.54–0.67 (0.67, n= 5) pigmentation pattern as in Fig. 3. Legs (Figs. 4–6) with mid-. hind femora entirely dark brown, hind tibial comb with seven spines. Terminalia (Figs. 7–9): tergite 9 reaching level of apex of gonocoxite distally, apicolateral processes absent, posterior margin rounded, notched posteromedially; (evident in figs 7 and 8); sternite 9 with shallow posteromedial excavation. Gonocoxite 2 X longer than broad, ventral root small, dorsal root long, slender; gonostylus pale, broad basally, abruptly tapering to slender apex, nearly straight for distal half. Parameres (Fig. 10) broadly fused at basal half; base slightly excavated anteriorly; distal portion U-shaped at base, each half abruptly tapering to elongate, slender filament with very fine finge of spicules. Aedeagus (Fig. 9) triangular with low, straight basal arch; basal arms slender, slightly curved; distal portion progressively tapering to tip; posteromedian process strongly sclerotized, sclerotization extending anteriorly nearly to basal arch, apex with rounded papilla. Discussion: Although the males herein recorded were not collected associated with females, they exhibit the same extragenital characters diagnostic for the females of C. baniwa: fifth palpal segment pale, mid femur dark to tip, presence of a double distal pale spot in cell r 3, and absence of pale spot in front of base of vein M 1.The male genitalia of C. baniwa is similar to that of C. hylas Macfie. However, in the latter species tergite 9 is shorter, not notched posteromedially and bears a small, posteromesal papilliform process, the gonostylus is curved and progressively tapering distally, the basal arch of the parameres is nearly straight and the sclerotization of the posteromedian process of the aedeagus is shorter and not abutting basal arch. Probably the occurrence of this species, with a new records in Cuzco Province, around 1.300 kilometers from the type locality, is well distributed in all the Amazon basin. Specimens examined: Areas of Collection: 1 male, at light, Brazil - Br. 307, Rodovia Perimetral Norte, Km. 54, Torre da LBA, São Gabriel da Cachoeira (00º 12 ' 44.6 "; 66 º 53 ' 00" W), 84 m masl; Sabá Gómes, P. Santos, E.G. Castellón, 24 /09 -01/ 10 / 2008, near of type locality of the species. Perú - Cuzco prov., Pagoreni (11 º 42 ' 21,9'' S - 72 º 54 ' 21,9'' W), 510 m masl, 15 -II- 2004, J.D. Williams, 1 male, at light; Perú, Cuzco prov., Kirigueti (11 º 38 ' 13 '' S - 73 º 07' 07'' W), 395 masl, 24 -II- 2004, J.D. Williams, 3 males, at light.Published as part of Castellón, Eloy Guillermo, Pessoa, Felipe Arley Costa, Spinelli, Gustavo & Felippe-Bauer, Maria Luiza, 2012, Description of the male of Culicoides (Hoffmania) baniwa Felippe-Bauer of the hylas species group (Diptera: Ceratopogonidae), pp. 66-68 in Zootaxa 3401 on pages 66-68, DOI: 10.5281/zenodo.21133
Scaling and intermittency in ocean turbulence: analysis of coastal water optical properties and sea surface temperature (SST)
No full textWe consider here some scaling and intermittency properties of oceanic turbulence, with a general aim of considering the impact of turbulence on the bio-optical dynamics. For that purpose, we tried two different approaches, using in situ and satellite data. For the in situ study we adopted one dimensional and for the satellite two dimensional approaches. Different techniques such as Fourier power spectrum, Empirical mode of decomposition (EMD), Hilbert spectral analysis (HSA) have been used for analyzing the intermittency characteristics of the in situ data. For analyzing the multi-scale properties of the satellite images, we have considered Structure functions (SF) and Fourier power spectrum (1D and 2D). The general objective is to understand the multi-scale oceanic variability using scaling tools developed in the field of intermittent turbulence studies
The organization of industry in the P.R. China: A new start or resort to old concepts?
No full textThe Chinese have let it be known since the death of Mao Zedong and the purge of the “Gang of Four” that they would in future draw on credits from foreign governments as well as other sources to finance imports of technology. According to western conjectures China’s capital requirements may be between US $ 25 and 50 bn or even a good deal higher. Many observers have taken the view that the Chinese have thereby put all their former development principles behind them. The author of the following article was in the P.R. China about the middle of this year at the invitation of the National Planning Commission. His assessment is that the P.R. China is far from embarking on an entirely new course in its development policy
Constant approximation for virtual backbone construction with guaranteed routing cost in wireless sensor networks
No full textSpin polarization in low-energy electron diffraction from Pt(111): experiment and theory
No full textBauer P, Feder R, Müller N. Spin polarization in low-energy electron diffraction from Pt(111): experiment and theory. Surface Science Letters. 1980;99(2):L395-L401.Spin polarization in low-energy electron diffraction from the (111) surface of platinum, which is geometrically unreconstructed, was measured by means of a Mott detector. Corresponding relativistic calculations yield mostly excellent agreement with the data and clearly favour an ion-core scattering potential model containing an energy-dependent exchange approximation
Economic potential of the P.R. Spring oil-impregnated deposit, Uinta Basin, Utah
No full textreportThe P.R. Spring oil-impregnated sandstone (tar sand) deposit is located in the southeastern portion of the Uinta Basin, approximately 50 miles northwest of Grand Junction, Colorado. These oil impregnated sandstones are in the Eocene Green River Formation and five zones have been identified. These zones consist of one or more lenticular beds of lacustrine sandstone, separated by intervals of barren lithologies. The degree of impregnation of individual beds within the five zones is controlled by the lateral extent of the bed, its porosity and permeability, and the distance the oil has migrated within the bed. The degree of saturation varies both laterally and vertically. The purpose of this report was to 1) determine the total hydrocarbon content of each zone in blocks of 640 acres or less, and 2) relate this data to current economic and mining feasibility. This study incorporates the results of 38 measured sections and 26 core holes. The oil extracted from the P.R. Spring tar sands is a naturally occurring, brown to black, highly viscous or solid mixture of hydrocarbons. Its composition indicates that the oil was formed in situ or migrated only a short distance. The author has calculated the total barrels of oil in place for the deposit to be approximately 3.3 billion barrels. This is less than other published calculations of 3.7 and 4.0 to 4.5 billion barrels (Byrd, 1967; Ritzma, 1974). Problems associated with the method of economic recovery of the oil remain to be solved. Only the southeastern corner of the field is strip rninable. Other areas will probably have to be exploited by in situ recovery methods and several are being tested. The only known active operation in P.R. Spring is by Bighorn Oil, located in the southeastern part of the deposit. Their operation consists of an open-pit mine and a 200-barrel-per-day extraction plant utilizing a solvent solution process. Surface water availability in the area is limited, but may be sufficient if storage, reuse and ground-water potential are considered. Oil extraction will require a fuel supply, possibly from generated coke and other byproduct fuels generated by the tar refining process or by local natural gas or coal production. Further work is needed in the area, specifically more core holes and associated analyses. Strategic drilling in T. 11 S., R. 22 and 24 E., and T. 12 S., R. 22 E., could be used to verify assumed saturation
Obivius Nationale Relatietest: Bachelor Eindverslag
No full textBachelor Eindverslag (MKT) over het bouwen van een web-applicatie t.b.v. Nescio's Hermitage bv, onder begeleiding van Peter van NieuwenhuizenMKTMediamaticsElectrical Engineering, Mathematics and Computer Scienc
Integrated metadata extraction for analysis by diver
No full textThis report describes the entire internship process we went through at Joost Technologies, to complete the Bachelor Computer Science program at the University of Delft. Joost Technologies strives to offer users, content owners and advertisers a world-wide, community- driven platform for video content. In the heart of this platform Joost uses a large database called the MDDB to store all video and channel meta data, however there was no proper way to analyze this data. Our assignment was to extract this information from the MDDB and supply this data in such a way that it can be imported by a Business Intelligence suite called Diver. The Diver program then enables the Business Intelligence team to get easy insight into the data, using figures, charts and other analytical functionality of the program. After ten weeks of labor we produced an application, named IMDEAD, that performs this task. This application offers a command line interface to start the extraction and parsing process. Also almost all settings used in the program are configurable, so that the execution can easily be adapted to each situation. The current implementation can be improved in a few ways. At the moment it does not allow for easy extension concerning Diver output. Also the locking system can be improved. Besides these improvements, we have assessed a few possible extensions to the program. At first the program might also integrate the Hadoop database data and hence be able to correlate this data with the meta data from the MDDB. Secondly, an archiving system could be introduced to provide Business Intelligence with an option to store and view historical data. In the conclusion we verify that the IMDEAD application complies with all the original software specifications and hence we conclude that we have successfully accomplished our assignment at Joost Technologies.Computer ScienceElectrical Engineering, Mathematics and Computer Scienc
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