74 research outputs found
Hydrachna papilligera K. Viets 1919
No full textHydrachna papilligera K. Viets, 1919 Species incerta Material examined: Holotype deutonymph SMF 941, Germany, Braunschweig, Teich bei Weddel, 8.7. 1910 Kühne. Discussion: This species was described from a single deutonymph. Later, the author himself proposed its synonymy to H. skorikowi (see K. Viets 1936). In view of the difficulties of associating nymphs to conspecific adults, it must be considered a species incerta.Published as part of Davids, Kees, Sabatino, Antonio Di, Gerecke, Reinhard, Gledhill, Terence & Smit, Harry, 2005, On the taxonomy of water mites (Acari: Hydrachnidia) described from the Palaearctic, part 1: Hydrachnidae, Limnocharidae and Eylaidae, pp. 36-64 in Zootaxa 1061 on page 48, DOI: 10.5281/zenodo.17018
Hydrachna bulgarensis K. Viets 1940
No full text<i>Hydrachna bulgarensis</i> K. Viets, 1940, nov. stat. <p> <i>Hydrachna perpera bulgarensis</i> K. Viets, 1940</p> <p>Material examined: Holotype male, SMF 5917, Bulgarien, See im Rila­Gebirge, 2200 m, Valkanov coll.</p> <p> Discussion: The author placed this taxon as a subspecies of the little known <i>H. perpera</i> which is here synonymized with <i>H. processifera</i>. <i>Hydrachna bulgarensis</i> obviously belongs to the <i>geographica</i> species group (Cx­4 with four setae, mediocaudal angles extended and narrow; gnathosoma with very long rostrum; palp slender, P­2 ventrally strongly concave, with 20 fine and short dorsal setae). Further characteristics are: P­3 proximally concave, most of the segment straight, with dorsal and ventral margins slightly converging distally, bearing five dorsal and six lateral setae; P­4 short, dorsal and ventral margins straight. In contrast to the figure of Viets (1940, Fig. 3), the genital setae are differentiated into two groups, with the setae flanking the gonopore a little longer and more densely arranged than on the remaining plate surface. In the form of the male gonopore with equally rounded anterior margin and the curved shape of the frontal sclerites, <i>H. bulgarensis</i> is most similar to <i>H. incisa</i>. Minor differences are found in the genital field not being indented anteriorly, the presence of an elevated median ridge between the acetabula­bearing areas and generally taller palp segments (L/H P­2 590/310, 1.90; P­3 570/190, 3.00; P­4 235/110, 2.14). For a better understanding of this taxon, possibly a junior synonym of <i>H. incisa</i>, a study of the variability of the latter taxon is necessary.</p>Published as part of <i>Davids, Kees, Sabatino, Antonio Di, Gerecke, Reinhard, Gledhill, Terence & Smit, Harry, 2005, On the taxonomy of water mites (Acari: Hydrachnidia) described from the Palaearctic, part 1: Hydrachnidae, Limnocharidae and Eylaidae, pp. 36-64 in Zootaxa 1061</i> on page 39, DOI: <a href="http://zenodo.org/record/170186">10.5281/zenodo.170186</a>
Economische evaluatie; g-groep ontwerp
No full textDocument uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science
Optimizing Advanced Ligo's Scientific Output with Fast, Accurate, Clean Calibration
No full textSince 2015, the direct observation of gravitational waves has opened a new window to observe the universe and made strong-field tests of Einstein's general theory of relativity possible for the first time. During the first two observing runs of the Advanced gravitational-wave detector network, the Laser Interferometer Gravitational-wave Observatory (LIGO) and the Virgo detector have made 10 detections of binary black hole mergers and one detection of a binary neutron star merger with a coincident gamma-ray burst. This dissertation discusses methods used in low and high latency to produce Advanced LIGO's calibrated strain data, highlighting improvements to accuracy, latency, and noise reduction that have been made since the beginning of the second observing run (O2). Systematic errors in the calibration during O2 varied by frequency, but were generally no greater that 5% in amplitude and 3 deg in phase from 20 Hz to 1 kHz. Due in part to this work, it is now possible to achieve calibration accuracy at the level of ~1% in amplitude and ~1 deg in phase, offering improvements to downstream astrophysical analyses. Since the beginning of O2, latency intrinsic to the calibration procedure has decreased from ~12 s to ~3 s. As latency in data distribution and the sending of automated alerts to astronomers is minimized, reduction in calibration latency will become important for follow-up of events like the binary neutron star merger GW170817. A method of removing spectral lines and broadband noise in the calibration procedure has been developed since O2, offering increases in total detectable volume during future observing runs. High-latency subtraction of lines and broadband noise had a large impact on astrophysical analyses during O2. A similar data product can now be made available in low latency for the first time.2019-11-2
Corporate Law - Formulating and Applying a Proper Purpose to a Books and Records Inspection Request - Schein v. Northern Rio Arriba Electric Cooperative, Inc.
No full textOptimizing Advanced Ligo\u27s Scientific Output with Fast, Accurate, Clean Calibration
No full textSince 2015, the direct observation of gravitational waves has opened a new window to observe the universe and made strong-field tests of Einstein\u27s general theory of relativity possible for the first time. During the first two observing runs of the Advanced gravitational-wave detector network, the Laser Interferometer Gravitational-wave Observatory (LIGO) and the Virgo detector have made 10 detections of binary black hole mergers and one detection of a binary neutron star merger with a coincident gamma-ray burst. This dissertation discusses methods used in low and high latency to produce Advanced LIGO\u27s calibrated strain data, highlighting improvements to accuracy, latency, and noise reduction that have been made since the beginning of the second observing run (O2).
Systematic errors in the calibration during O2 varied by frequency, but were generally no greater that 5% in amplitude and 3 deg in phase from 20 Hz to 1 kHz. Due in part to this work, it is now possible to achieve calibration accuracy at the level of ~1% in amplitude and ~1 deg in phase, offering improvements to downstream astrophysical analyses. Since the beginning of O2, latency intrinsic to the calibration procedure has decreased from ~12 s to ~3 s. As latency in data distribution and the sending of automated alerts to astronomers is minimized, reduction in calibration latency will become important for follow-up of events like the binary neutron star merger GW170817. A method of removing spectral lines and broadband noise in the calibration procedure has been developed since O2, offering increases in total detectable volume during future observing runs. High-latency subtraction of lines and broadband noise had a large impact on astrophysical analyses during O2. A similar data product can now be made available in low latency for the first time
Ropes of sand, and other stories [electronic resource]/ by the author of "Woven of many threads," "A crown from the spear."
No full textMonte Carlo Simulations of Growth/Decay Rate Constant Ratios for Small Methanol Clusters: Application to Nucleation Data Analysis
No full textThe Bennett Monte Carlo technique and the potential of van Leeuwen and Smit are used to calculate growth/decay rate constant ratios for small model methanol clusters at 220K, 240K and 260K. Temperature scaling properties of the rate constant ratios are demonstrated at these temperatures. The Monte Carlo results are used to study heat release from subcritical cluster formation in adiabatic nucleation rate measurements and to determine corrected final temperatures and supersaturation ratios for the methanol data of Strey, Wagner, and Schmeling. The corrected T and S values provide experimental rates with improved scaling properties. Nucleation rates are also calculated from the Monte Carlo free energy differences for the model methanol clusters and demonstrate the same scaling
Les acariens du genre <i>Atractides</i> Koch, 1837 (Acari, Hydrachnidia: Hygrobatidae) en Corse et en Sardaigne
No full textLa diversité et la distribution des acariens aquatiques du genre Atractides Koch, 1837, inféodé aux sources et aux cours d’eau, est analysée pour la Corse et la Sardaigne sur la base de données bibliographiques, du matériel de la collection Angelier (MNHN) et des collectes effectuées dans le milieu naturel par l’auteur à la fin du xxe siècle. Les seules informations publiées sur la présence d’Atractides dans l’aire étudiée concernent la Corse (Angelier 1954a, b; Santucci 1965, 1971, 1977; Giudicelli 1970; Gerecke & Di Sabatino 2013). Deux espèces incomplètement documentées sont redécrites, Atractides gracilipes (E. Angelier, 1954) (matériel type plus disponible) et A. corsicus E. Angelier, 1954 (six syntypes trouvés au NHMB). Les signalisations publiées (entre parenthèses) font références aux espèces A. robustus (Sokolow, 1940) et A. acutirostris Motaş & Angelier, 1928. Au total, 24 espèces d’Atractides sont maintenant connues des deux îles, dont 50 % signalées ici pour la première fois : Atractides allgaier Gerecke, 2003, A. clavipes Lundblad, 1954, A. fonticolus (K. Viets, 1950), A. graecus K. Viets, 1950, A. inflatus (Walter, 1925), A. loricatus Piersing, 1898, A. macrolaminatus Láska, 1956, A. orghidani Motaş & Tanasachi, 1960, A. polyporus (K. Viets, 1922), A. protendens K.O.Viets, 1955, A. spinipes Koch, 1837, A. valencianus K. Viets, 1930. Sur les 20 espèces connues de Corse, neuf sont signalées pour la première fois – pour la Sardaigne, les 19 espèces d’Atractides sont nouvelles. Concernant les faunes nationales, six espèces sont nouvelles pour l’Italie (A. allgaier, A. corsicus, A. giustinii Gerecke & Di Sabatino, 2013, A. gracilipes, A. orghidani, A. valencianus), et trois pour la France (A. graecus, A. macrolaminatus, A. protendens). Based on bibliographic data, material from coll. E. Angelier and own field work of the author done in the late 20th century, a survey is given on the diversity and distribution of spring- and stream-dwelling water mites of the genus Atractides Koch, 1837 on Corsica and Sardinia. Published information on presence of Atractides in the area covered was restricted to Corsica (Angelier 1954a, b; Santucci 1965, 1971, 1977; Giudicelli 1970; Gerecke & Di Sabatino 2013). Redescriptions are given of the incompletely documented species Atractides gracilipes (E. Angelier, 1951) (no more documented by type material) and A. corsicus E. Angelier, 1954 (of which six syntypes could be detected in NHMB). Published records (in brackets) are referred to the species A. robustus (Sokolow, 1940) and A. acutirostris Motaş & Angelier, 1928. In total, 24 Atractides species are now known from the two islands, 50 % of them recorded here for the first time: Atractides allgaier Gerecke, 2003, A. clavipes Lundblad, 1954, A. fonticolus (K. Viets, 1950), A. graecus K. Viets, 1950, A. inflatus (Walter, 1925), A. loricatus Piersing, 1898, A. macrolaminatus Láska, 1956, A. orghidani Motaş & Tanasachi, 1960, A. polyporus (K. Viets, 1922), A. protendens K.O.Viets, 1955, A. spinipes Koch, 1837, A. valencianus K. Viets, 1930. Of the 20 species known from Corsica, nine are first records – from Sardinia all 19 Atractides species are recorded for the first time. Concerning the national faunas, six species are new for Italy (A. allgaier, A. corsicus, A. giustinii Gerecke & Di Sabatino, 2013, A. gracilipes, A. orghidani, A. valencianus), three for France (A. graecus, A. macrolaminatus, A. protendens).</p
A crown from the spear [electronic resource]/ by the author of "Woven of many threads" ...
No full text- …
