1,647 research outputs found
Development Of A Preliminary Lifing Analysis Tool For The F135-PW-100 Engine
No full textIn the near future the Royal Netherlands Air Force will replace their fleet of F-16’s with the F-35. In the past the NLR has aided the Air Force with life cycle and deterioration analysis work on the F100-PW-220 engine, which powers the F-16. Understanding the physical system of the engine allows for on-condition maintenance. The same is preferred for the F135-PW-100 engine powering the F-35. Therefore, a preliminary lifing analysis tool has been developed for the F135-PW-100 engine rotor blades, based on open source literature. Aerospace Engineerin
Ascoschoengastia
No full textKey to Australian species of Ascoschoengastia larvae, modified from Domrow & Lester (1985) 1. Sensilla filamentous...................................................................................................................................................... 2 - Sensilla clavate............................................................................................................................................................ 4 2. Scutum rectangular, PW/AP = 2.5 –3.0, dorsal body rows commencing 2.6.................................................................. ................................................................................................................. A. (Ascoschoengastia) incurva (Womersley) - Scutum quadrate, PW/AP <1.5, dorsal body rows commencing 2.8........................................................................... 3 3. Coxa III with ca. 6 setae.......................................................................................... A. (Ascoschoengastia) setosa Goff - Coxa III with usual single seta.......................................................................... A. (Ascoschoengastia) deficiens Lester 4. Scutum relatively narrow, quadrate, PW/AP 1.7–1.8...................... A. (Laurentella) rattus (Womersley and Heaslip) - Scutum relatively broad, subquadrate, PW/AP 1.9–2.8............................................................................................... 5 5. Body rows 2.8. 6.6., PW/AP 1.9–2.2, 2 prominent nude setae on tarsi III...................... A. (Laurentella) indica (Hirst) - Body rows 2.6. 6.4., PW/AP 2.4–2.8, 1 prominent nude seta on tarsi III................. A. (Laurentella) lorius (Gunther)Published as part of Shaw, Matthew, 2010, Post-larval stages of Ascoschoengastia (Laurentella) lorius (Gunther) (Acariformes: Trombiculidae) provide evidence for a nest-based life history, pp. 55-64 in Zootaxa 2680 on page 62, DOI: 10.5281/zenodo.19931
The use of in-situ deployments to examine the success of water quality mitigation measures on a watercress farm
No full textWatercress has long been believed to affect
macroinvertebrate communities in chalk streams.
Harvesting and washing watercress damages plant tissues
and releases isothiocyanates which are potential toxicants
to Gammarus pulex (L.). This study examined whether impacts on G. pulex of watercress farm factory wash water could be mitigated by treating via recirculation through the watercress beds
0.85 PW laser operation at 3.3 Hz and high-contrast ultrahigh-intensity λ = 400 nm second-harmonic beamline
No full textWe demonstrate the generation of 0.85 PW, 30 fs laser pulses at a repetition rate of 3.3 Hz with a record average power of 85 W from a Ti:sapphire laser. The system is pumped by high-energy Nd:glass slab amplifiers frequency doubled in LiB3O5 (LBO). Ultrahigh-contrast λ = 400 nm femtosecond pulses were generated in KH2PO4 (KDP) with>40% efficiency. An intensity of 6.5 × 1021 W∕cm2 was obtained by frequency doubling 80% of the available Ti:sapphire energy and focusing the doubled light with an f∕2 parabola. This laser will enable highly relativistic plasma experiments to be conducted at high repetition rate
Shifting attention in viewer- and object-based reference frames after unilateral brain injury
No full textThe aims of the present study were to investigate the respective roles that object- and viewer-based reference frames play in reorienting visual attention, and to assess their influence after unilateral brain injury. To do so, we studied 16 right hemisphere injured (RHI) and 13 left hemisphere injured (LHI) patients. We used a cueing design that manipulates the location of cues and targets relative to a display comprised of two rectangles (i.e., objects). Unlike previous studies with patients, we presented all cues at midline rather than in the left or right visual fields. Thus, in the critical conditions in which targets were presented laterally, reorienting of attention was always from a midline cue. Performance was measured for lateralized target detection as a function of viewer-based (contra- and ipsilesional sides) and object-based (requiring reorienting within or between objects) reference frames. As expected, contralesional detection was slower than ipsilesional detection for the patients. More importantly, objects influenced target detection differently in the contralesional and ipsilesional fields. Contralesionally, reorienting to a target within the cued object took longer than reorienting to a target in the same location but in the uncued object. This finding is consistent with object-based neglect. Ipsilesionally, the means were in the opposite direction. Furthermore, no significant difference was found in object-based influences between the patient groups (RHI vs. LHI). These findings are discussed in the context of reference frames used in reorienting attention for target detection
Deleaster wilhelmensis Shaw & Eos & Llc & Cs & Cs 2018, sp. nov.
No full textDeleaster wilhelmensis sp. nov. Type locality. Papua New Guinea, Eastern Highlands, Mt. Wilhelm, Pengal River, 9200 ft. [ca. 2760 m], [approximate coordinates: 5 ° 47ʹS 145 ° 05ʹE. Type material. HOLOTYPE: ♀: “ New Guinea, Eastern Highlands, Mt. Wilhelm.Pengal River, 9200 ft., 16.5- 9.6.1963. W.W.Brandt // Deleaster det. A.F. Newton 1987 // ANIC Specimen [green label] // HOLOTYPE Deleaster wilhelmensis sp. nov. Jenkins Shaw des. 2017”. The holotype is deposited in the Australian National Insect Collection (ANIC). Description. Measurements (all in millimeters): HW = 1.41; TW = 1.13; PW = 1.33; SW = 2.26; AW = 2.43; Hl = 1.03; el = 0.55; Tl = 0.27; Pl = 1.13; sl = 2.55; sC = 2.23; FB = 4.9; Bl = 7.6. Habitus as in Fig. 1A. Overall dark brown with head appearing slightly darker, almost black. Antennae dark brown. Legs light brown; tarsi slightly paler than tibiae and femora. Head excluding clypeus transverse; clypeus strongly produced with two pairs of small punctures situated laterally. Head and clypeus with linear microsculpture. Vertex with two punctate impressions extending from posterior edge of head to inner margin of eyes. Labrum weakly emarginate. Frontoclypeal (epistomal) suture distinct (Fig. 1B: fs). Temples with weak setiferous punctures. Neck with distinct transverse microsculpture. Antennae with first antennomere distinctly thickened compared to subsequent antennomeres; third antennomere as long as first antennomere. Antennal insertions almost obscured in dorsal view. All antennomeres with both macro and micro setae. Apical area of antennomeres six to ten with short, stout white setae (referred to as ‘ciliae’ by HAYASHI (1984)). Pronotum widest anteriorly, weakly narrowed posteriorly; front angles forming an evenly rounded right angle; hind angles evenly rounded. Dorsal surface with distinct linear microsculpture and weak punctures throughout, the distance between the punctures equal to the diameter of two or three punctures combined. Pair of larger punctures present towards anterior margin of pronotum. Laterobasal areas of pronotum each with impression extending halfway along edge of pronotum, with some micro setae at the posterior end of each impression. Central basal area with distinct transverse impression. Hypomeron large; covered with microsculpture (Fig. 1C: hy). Apex of basisternum acute. Scutellum slightly paler than elytra; with rugose microsculpture and pale pubescence. Elytra widest at apical third; confusely but weakly punctured with short pale setae; weak rugose microsculpture present between elytral punctures. Hind wings apparently present (not studied), folded under elytra. Legs rather long and slender; fifth tarsomere as long as one to four combined. Claws half the length of fifth protarsomere. Abdomen broadest at tergite IV. Tergites covered in short pale setae; weak transverse microsculpture present except at medioapical area of each tergite. Tergites III to VI with widely separated pair of long golden macro setae situated close to posterior margin; tergite VII with two pairs of widely seperated long golden macro setae situated close to posterior margin. Tergite VIII with middle of apical margin deeply incised, forming pair of small teeth, each bordered by a long lobe (Fig. 1D). Differential diagnosis. Aside from being a geographic outlier within the genus (Fig. 2), D. wilhelmensis may be distinguished from congeners based on the following combination of characters: overall dark brown colouration; pronotum without pubescence; distinctly wide and rounded lateral contour in apical third of elytra; abdomen widest at tergite III; tergite VIII with middle of apical margin deeply incised, forming pair of small teeth, each bordered by a long lobe (Fig. 1D). CUCCODORO & MAK- RANCZY (2013) were the first to mention and illustrate the structure of tergite VIII in the genus and in the Afrotropical Deleaster they noted the shape was similar in both sexes. Deleaster wilhelmensis can be distinguished from congeners based on the following: from D. dichrous (Gravenhorst, 1802) and D. trimaculatus Fall, 1910 by the dark colouration of the elytra; from D. pectinatus Fauvel, 1882, D. gibbosus Cuccodoro & Makranczy, 2013 and D. negus Cuccodoro & Makranczy, 2013 by the shape of tergite VIII (middle of apical margin deeply incised, forming pair of small teeth, each bordered by a long lobe); from D. yokoyamai Adachi, 1935 by the presence of microsculpture on the head, longer second antennomere compared to third and lack of pubescence on the pronotum; from D. bactrianus Semenow, 1900 by the longer second antennomere compared to third, front angles or pronotum evenly rounded (obtuse in D. bactrianus) and abdomen widest at tergite IV (tergite V in D. bactrianus); from D. taiwanensis Hayashi, 1984 by the abdomen widest at tergite IV (tergite V in D. taiwanensis) and shape of tergite VIII (described as ‘shallowly emarginate’ for D. taiwanensis by HAYASHI (1984)). Etymology. The species name refers to the fact that the only known specimen of D. wilhelmensis was collected from Mount Wilhelm, Papua New Guinea. It is an adjective derived from the mountain’s name. Distribution and bionomics. The single known specimen was collected from Mount Wilhelm at about 2760 m with the locality given as Pengal River (Fig 2). According to BISHOP MUSEUM (1966) and SIBATANI (1974), Pengal River as referred to in Brandt’s collection is ‘Pengal R (upper), 5 ° 47’ 145 ° 05’, 2760 m’ and is apparently on the east side of Mount Wilhelm and the northern slope of the Bismarck Range, upstream of the Imbrum River. Although the precise habitat or method of collecting for this specimen is unknown, most likely it is a riparian. It is notable that all known species of Deleaster are confined to wet habitats (e.g. stream banks, leaf litter, caves, under stones) and often in mountainous regions (GREBENNIKOV 2002).Published as part of Shaw, Josh Jenkins, 2018, Significant range expansion for the rove beetle genus Deleaster, based on a new species from Papua New Guinea (Coleoptera: Staphylinidae: Oxytelinae), pp. 21-24 in Acta Entomologica Musei Nationalis Pragae 58 (1) on pages 22-23, DOI: 10.2478/aemnp-2018-0004, http://zenodo.org/record/367523
Supplementary Data: Spectral Control via Multi-Species Effects in PW-Class Laser-Ion Acceleration
No full textSupplementary materials for our paper "Spectral Control via Multi-Species Effects in PW-Class Laser-Ion Acceleration".
Additional high-resolution, raw HDF5 files using the openPMD standard (DOI:10.5281/zenodo.1167843) increase simulation output data to 4.7 TByte and are available from the corresponding author upon reasonable request.This project received funding within the MEPHISTO project (BMBF-Förderkennzeichen 01IH16006C)
Wall-pressure-velocity transfer kernel in high Reynolds number turbulent channel flows
No full textSince wall-pressure fluctuations would form a practically-robust input to a real-time active controller of wall-bounded turbulence, it is of high practical interest to study the scaling behavior of the wall-pressure-velocity coupling. This work investigates the coupling of the wall-pressure fluctuations with the streamwise and wall-normal velocity fluctuations. Both the gain (or coherence) and phase spectra of the wall-pressure-velocity transfer kernel are assessed using a comprehensive database, available from direct numerical simulations of turbulent channel flow. With data spanning a decade in friction Reynolds number Reτ ∼ 550-5200, a 1D analysis (in terms of the streamwise wavelength, λx) reveals that the streamwise velocity and wall-pressure are most strongly coupled at a self-similar wall-scaling of λx/y ≈ 14. For the wall-normal velocity component, the strongest coupling appears at approximately half this ratio (λx/y ≈ 8.5). An analysis of the kernel's phase demonstrates that both the coherent fluctuations of streamwise and wall-normal velocity obey a forward-leaning inclination angle of α ≈ 30◦. When extending the analysis to 2D (as a function of λx and λz), the peak-coherence for pw and u still resides close to λx/y ≈ 14 and is reasonably symmetric around λx/λz = 2.3. The 2D coherence for pw and v peaks around λx/λz = 1.0. Both the 2D coherence for pw and u, and pw and v, adhere to a wall-scaling with y. Scaling behaviours identified in this work will aid the efficacy of real-time controllers, by for instance the implementation of data-derived FIR filters to only control velocity structures that are captured through wall-pressure measurements.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Aerodynamic
Kościół katedralny pw. Wniebowzięcia Najświętszej Maryi Panny i Polonia w Charkowie: krótki szkic historyczny (XIX wiek)
No full textCathedral church of Assumptoin of the Blessed Virgin Marry a short historical draft (19th century). The author of the article presents a short outline of the cathedral church of Assumption of the Blessed Virgin Marry in Kharkiv since the moment it was built to its ceremonial cosercation in June 26, 1892 by the bishop of Molyhowska Diocese Albin Simon. Building of the church has been shown on the background of functioning of Polish community in Kharkiv in the 19th century which from a small group of believers managed transform into an important part of the citizens of the city. The cathedral church of Assumption of the Blessed Virgin Marry was a rock for Poles’ activities leaving in Kharkiv. The church survived till today and it adrous the city centre as an architectural jewel.Kościół katedralny pw. Wniebowzięcia Najświętszej Maryi Panny i Polonia w Charkowie: krótki szkic historyczny (XIX wiek). Autorka w przedstawionym artykule przybliża krótki zarys historii kościoła katedralnego pw. Wniebowzięcia Najświętszej Maryi Panny w Charkowie od czasu jego wzniesienia do chwili jego uroczystego poświęcenia 26 lipca 1892 roku przez biskupa pomocniczego diecezji mohylowskiej Franciszka Albina Simona. Budowa świątyni została ukazana na tle funkcjonowania w Charkowie w XIX wieku społeczności polskiej, która z niewielkiej garstki wiernych zdołała przekształcić się w niezwykle istotną część składową mieszkańców miasta. Ostoją dla działalności Polaków mieszkających w Charkowie był kościół katedralny pw. Wniebowzięcia Najświętszej Maryi Panny, który przetrwał do czasów obecnych, i dziś, jako perła architektury sakralnej, zdobi centrum miasta
Perikinetics and sludge study for the decontamination of petroleum produced water (PW) using novel mucuna seed extract
No full text© 2016, The Author(s). cc-by-nc-ndIn this study, Mucuna flagellipes seed extract was applied in the coagulation–flocculation of produced water (PW). Process parameters such as pH, dosage, and settling time were investigated. Process kinetics was also studied. Instrumental characterization of mucuna seed (MS), mucuna seed coagulant (MSC), and post effluent treatment settled sludge (PTSS) were carried out. The optimum decontamination efficiency of 95 % was obtained at 1 g/L MSC dosage, PW pH of 2, and rate constant of 0.0001 (L/g/s). Characterization results indicated that MS, MSC, and PTSS were of network structure, primitive lattice, and thermally stable. It could be concluded that MSC would be potential biomass for the treatment of produced water under the experimental conditions
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