196,054 research outputs found
Metatanais bipunctatus Blazewicz-Paszkowycz & Zemko 2009, sp. n.
No full textMetatanais bipunctatus sp. n. urn:lsid:zoobank.org:act: 0DFA750C-CDC5-43FB-9083-CB8FD71AA9CA Figs 3–5 Material examined: Holotype: Female (1.7 mm) (MTQ W31164), CGLI 31, 14.68039°S, 145.4453°E, Lizard Island, Casuarina Beach, dead coral, depth 1 m, 15 Apr 2008. Paratypes: 1 specimen (1.5 mm), (MTQ W31164), CGLI 20, 14°64.553’S, 145°65.335’E, North Point, dead coral rubble, depth 0.5–1.5 m, 12 Apr 2008. 1 specimen, dissected in slides (WAM C42469), NIN 17, Western Australia, Ningaloo Reef, off Tantabiddy, reef front 21.92833°S, 113.9196°E, dead Acropora head, depth 13–15 m, 17 Jun 2008. Diagnosis: Body over four times as long as wide. Antennule article 1 less than twice as long as wide. Pereopod 4–6 propodus compact (about three times as long as wide), with spiniform setae ventrally. Etymology: bipunctatus [Latin]: with two spots, referring to presence of dorsal orange spots, one on the posterior of the carapace and one on pereonite 6. Description: Female without oostegites (Fig. 1A, B) 1.5 mm long. Body about 4.5 times as long as wide. Carapace 16% of body length, as long as wide, without rostrum, tapering towards the anterior, with mid-dorsal orange spot near posterior margin. Pereon about half of total body length. All pereonites wider than long, margins rounded in dorsal view. Pereonite 1 0.25 times as long as wide; pereonites 2 and 3 subequal and little longer than pereonite 1. Pereonites 4 and 5 subequal, 0.4 times as long as wide. Pereonite 6 subequal to pereonite 2, with orange spot mid-dorsally. Pleonites subequal in size (0.15 times as long as wide); pleotelson as long as combined length of pleonites 3 to 5, tapering posteriorly, produced medially. Antennule (Fig. 2A) three-articled; article 1 barrel-shaped, half as long as carapace, less than twice as long as wide, with two simple, blunt setae on distal upper margin, distally overlapping base of article 2. Article 2 as long as wide, about one fifth as long as article 1, with one seta. Article 3 subequal in length to article 2, but slightly narrower, with one long and two short rod setae and one aesthetasc distally. Antenna (Fig. 2B) six-articled. Article 2 1.1 times as long as wide, with one setae distally. Article 3 little shorter than wide, half as long as article 2, with one simple setae distally. Article 4 compact, about twice as long as wide, and subequal in length to article 2, with two pinnate setae along the dorsal margin. Article 5 1.3 times as long as wide, with one simple seta distally. Article 6 minute, with two long and two short distal setae. Mouthparts: Labrum (Fig. 2C) hood shaped, with fine setae. Left mandible (Fig. 2D) molar robust, as long as wide, incisor with sharp processes distally; lacinia mobilis of moderate size, distal margin crenulated; right mandible (Fig. 2E) incisor process simple, lacinia mobilis absent. Maxillule (Fig. 2G) endite with eight spiniform setae distally and setose outer margin. Palp (Fig. 2 G') with two articles, distal article tipped by two long simple setae. Maxilla (Fig. 2H) triangular, naked. Maxilliped (Fig. 2F) bases semi-fused; endites plate-like, exceeding bases of maxilliped distally and laterally, with one long simple setae distally and anterolateral rows of fine setae. Maxilliped palp article 1 with simple seta on outer margin; article 2 wedge-shaped with two plumose and one simple seta on the inner margin; article 3 with one plumose seta and three simple setae on the inner margin; article 4 with five plumose setae distally and one simple seta on outer margin. Epignath (Fig. 2I, I') narrow with six short simple setae on distal margin. Cheliped (Fig. 3A) basis as long as wide; similar in size to sidepiece. Merus wedgeshape, naked. Carpus 1.3 times as long as wide, with one seta on dorsal margin. Propodus massive about twice as long as wide; palm little longer than dactylus; fixed finger with strongly calcified inner margin; two small setae on ventral margin. Dactylus little longer than well-calcified unguis. Pereopod 1 (Fig. 3B) coxa with one simple seta on dorsal margin; basis about as long as combined length of carpus and propodus, 5.3 times as long as wide. Ischium naked. Merus as long as carpus, naked. Carpus with two spines and one seta distally (Fig. 3 B'). Propodus (Fig. 3 '') 1.4 times as long as carpus, with two dorso-distal rod setae and one minute spine ventrally. Dactylus shorter than unguis. Pereopod 2 (Fig. 3 C–C'') similar to pereopod 1, but propodus (Fig. 3 C'') with one rod seta dorso-distally. Pereopod 3 (Fig. 3D) similar to pereopod 2, but merus with two minute distal spines ventrally, propodus without simple setae on the dorsal margin. Pereopod 4 (Fig. 3E) basis broken; ischium with one simple seta, merus with two short spines disto-ventrally; carpus with one rod seta and spine distally, propodus with one simple seta distally, one spine ventrally and one fine seta in middle of dorsal margin; dactylus twice as long as unguis, curved. Pereopod 5 (Fig. 3F) similar to pereopod 4, but ischium naked and carpus with three thick short distal spines. Pereopod 6 (Fig. 3G) similar to pereopod 5, but propodus with four short simple setae distally. Uropod (Fig. 3H) rudimentary; uniramous, basal article wider than long, embracing base of ramus article 1; article 2 rudimentary with one short and four long rod setae distally. Distribution. Th e species was recorded from reefs around Lizard Island (northeastern Australia) and Ningaloo Reef, (north-western Australia) in coral rubble and on dead heads of coral at depths down to 15 m.Published as part of Blazewicz-Paszkowycz, Magdalena & Zemko, Karol, 2009, A new species of Metatanais Shiino, 1952 (Crustacea, Tanaidacea, Paratanaoidea) from Australian coral reefs, with a redefinition of the genus, pp. 129-141 in ZooKeys 18 (18) on pages 133-139, DOI: 10.3897/zookeys.18.114, http://zenodo.org/record/57649
CXO J004318.8+412016*A steady supersoft X-ray source in M 31
No full textWe obtained an optical spectrum of a star we identify as the optical counterpart of the M31 Chandra source CXO J004318.8+412016, because of prominent emission lines of the Balmer series, of neutral helium, and a He II line at 4686 Å. The continuum energy distribution and the spectral characteristics demonstrate the presence of a red giant of K or earlier spectral type, so we concluded that the binary is likely to be a symbiotic system. CXO J004318.8+412016 has been observed in X-rays as a luminous supersoft source (SSS) since 1979, with effective temperature exceeding 40 eV and variable X-ray luminosity, oscillating between a few times 1035 erg s-1 and a few times 1037 erg s-1 in the space of a few weeks. The optical, infrared and ultraviolet colours of the optical object are consistent with an an accretion disc around a compact object companion, which may be either a white dwarf or a black hole, depending on the system parameters. If the origin of the luminous supersoft X-rays is the atmosphere of a white dwarf that is burning hydrogen in shell, it is as hot and luminous as post-thermonuclear flash novae, yet no major optical outburst has ever been observed, suggesting that the white dwarf is very massive (m ≥ 1.2 M⊙) and it is accreting and burning at the high rate m > 10-8 M⊙ yr-1 expected for Type Ia supernovae progenitors. In this case, the X-ray variability may be due to a very short recurrence time of only mildly degenerate thermonuclear flashes.Fil: Orio, Marina. Osservatorio Astronomico Di Padova; Italia. University of Wisconsin; Estados UnidosFil: Luna, Gerardo Juan Manuel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. Universidad de Buenos Aires; ArgentinaFil: Kotulla, R.. University of Wisconsin; Estados UnidosFil: Gallager, J. S.. University of Wisconsin; Estados UnidosFil: Zampieri, L.. Osservatorio Astronomico Di Padova; ItaliaFil: Mikolajewska, J.. Nicolaus Copernicus Astronomical Center Of The Polish Academy Of Sciences; PoloniaFil: Harbeck, D.. Wiyn Observatory; Estados UnidosFil: Bianchini, A.. Università di Padova; ItaliaFil: Chiosi, E.. Università di Padova; ItaliaFil: Della Valle, M.. Osservatorio Astronomico Di Capodimonte; ItaliaFil: de Martino, D.. Osservatorio Astronomico Di Capodimonte; ItaliaFil: Kaur, A.. Clemson University; Estados UnidosFil: Mapelli, M.. Osservatorio di Padova; ItaliaFil: Munari, U.. Osservatorio di Padova; ItaliaFil: Odendaal, A.. University of the Free State; SudáfricaFil: Trinchieri, G.. Osservatorio Astronomico di Brera; ItaliaFil: Wade, J.. University of Wisconsin; Estados UnidosFil: Zemko, P.. Università di Padova; Itali
Constraining the Accretion Geometry of the Intermediate Polar EX Hya Using NuSTAR, Swift, and Chandra Observations
No full textIn magnetically accreting white dwarfs, the height above the white dwarf surface where the standing shock is formed is intimately related with the accretion rate and the white dwarf mass. However, it is difficult to measure. We obtained new data with NuSTAR and Swift that, together with archival Chandra data, allow us to constrain the height of the shock in the intermediate polar EX Hya. We conclude that the shock has to form at least at a distance of about one white dwarf radius from the surface in order to explain the weak Fe Kα 6.4 keV line, the absence of a reflection hump in the high-energy continuum, and the energy dependence of the white dwarf spin pulsed fraction. Additionally, the NuSTAR data allowed us to measure the true, uncontaminated hard X-ray (12-40 keV) flux, whose measurement was contaminated by the nearby galaxy cluster Abell 3528 in non-imaging X-ray instruments.Fil: Luna, Gerardo Juan Manuel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Mukai, K.. National Aeronautics and Space Administration; Estados UnidosFil: Orio, M.. Università di Padova; ItaliaFil: Zemko, P.. Università di Padova; Itali
Markers of biological age in dogs
No full textAs human life expectancy continues to rise, ageing and age-related diseases have become critical societal challenges, driving extensive research across genetics, molecular biology, biochemistry, and behavioral sciences. In this context, domestic dogs (Canis lupus familiaris) offer a unique model for ageing research due to their shared environmental exposures with humans, diverse genetic profiles, and relatively short lifespans. This review aims to identify potential biomarkers of ageing in dogs, facilitating a deeper understanding of age-related mechanisms and supporting the evaluation of interventions designed to promote healthy ageing. We present a research of peer-reviewed literature on age-related variations of various parameters across multiple biological systems, including epigenetic, telomere, immune, metabolic, and cognitive markers in dogs. Our findings highlight several robust biomarkers, such as DNA methylation-based epigenetic clocks, telomere attrition, CD4+/CD8+ T-cell ratio, hematological markers (e.g., globulin levels), and cognitive function scores. These biomarkers demonstrate strong parallels with human ageing processes, particularly concerning genomic and epigenetic alterations. However, challenges remain, including breed-specific variability, body size differences, and inconsistent evidence regarding inflammageing markers, such as pro-inflammatory cytokines. Despite these limitations, indicators of chronic inflammation (e.g., anemia of chronic disease and elevated globulins) are evident in older dogs. Future research directions include the standardization of biomarker protocols for dogs, the development of longitudinal studies to track dynamic age-related changes, and further exploration of emerging biomarkers, such as those related to microbiome composition and oxidative stress
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
V4743 Sgr, a magnetic nova?
No full textTwo XMM-Newton observations of Nova V4743 Sgr (Nova Sgr 2002) were performed shortly after it returned to quiescence, 2 and 3.5 yr after the explosion. The X-ray light curves revealed a modulation with a frequency of ≃0.75 mHz, indicating that V4743 Sgr is most probably an intermediate polar (IP). The X-ray spectra have characteristics in common with known IPs, with a hard thermal plasma component that can be fitted only assuming a partially covering absorber. In 2004, the X-ray spectrum had also a supersoft blackbody-like component, whose temperature was close to that of the white dwarf (WD) in the supersoft X-ray phase following the outburst, but with flux by at least two orders of magnitude lower. In quiescent IPs, a soft X-ray flux component originates at times in the polar regions irradiated by an accretion column, but the supersoft component of V4743 Sgr disappeared in 2006, indicating a possible origin different from accretion. We suggest that it may have been due to an atmospheric temperature gradient on the WD surface, or to continuing localized thermonuclear burning at the bottom of the envelope, before complete turn-off. An optical spectrum obtained with Southern African Large Telescope (SALT) 11.5 yr after the outburst showed a prominent He II λ4686 line and the Bowen blend, which reveal a very hot region, but with peak temperature shifted to the ultraviolet range. V4743 Sgr is the third post-outburst nova and IP candidate showing a low-luminosity supersoft component in the X-ray flux a few years after the outburst
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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