199,068 research outputs found
Spatial pattern of nerve differentiation in Hydra is due to a pattern of nerve commitment
No full textThe pattern of nerve differentiation along the body column of Hydra was investigated. Nerve precursors in late S phase were labeled with [3H]thymidine and their distribution compared with that of newly differentiated nerves. The two distributions were found to be the same. Based on independent evidence that nerve commitment occurs in mid-to late S phase (G. Venugopal and C. David, 1981, Develop. Biol.83, 361–365) it was concluded that the pattern of nerve differentiation along the body column of Hydra is due to differences in nerve commitment in different body regions. Furthermore, the level of nerve commitment in head and foot tissue is sufficiently high to deplete stem cells in these regions as is observed
Pheropsophus indicus Venugopal & Thomas 2019, sp. nov.
No full text<i>Pheropsophus indicus</i> sp. nov. <p>(Fig. 4 B, 5 B)</p> <p> <b>Specimens examined (n=2)</b>: Holotype, labelled “ Male, India: Kerala: Palakkad (10.806420°N, 76.690174°E), Hand Picking (Wet Paddy field), 26.XI.2017, coll. M. Divya ”; Paratype, male, India: Karnataka, 2013, coll. A. Anichtchenko.</p> <p> <b>Description.</b> TLA: 15.8 mm; TW: 6.6 mm</p> <p> <b>Colour:</b> Black head, pronotum and elytra. Black spot on head wide, widest towards pronotum, broad ‘M’ shaped black spot on vertex of head with a narrow extension up to the clypeus; clypeus and labrum black; epistome, margin around the eyes, reddish yellow; maxillary and labial palpi, reddish brown; eyes grey; first four antennal segments light reddish yellow, segments 2–4 with reddish brown ring on the apical portion, segments 5–11 reddish brown; scutellum black; humeral spot pale reddish yellow; legs with coxa, trochanter, femur, tibiae and 1 st segment of tarsi, reddish yellow; rest of the tarsal segments reddish brown; claws dark brown; apex of femur with wide black spot; underside of head reddish yellow, gula well-marked with reddish brown gular suture; prothorax including the prosternum black; mesosternum black; metasternum anterior half reddish yellow and posterior half black; metepisternum black.</p> <p> <b>Head:</b> Stout, smooth, glabrous, shiny, neck wrinkled; eyes protruding, with one supraorbital setae in the mid region above eye; antennae long, reaching the middle of elytra.</p> <p> <b>Pronotum:</b> Wider than long, smooth, glabrous except for a group of minute seta lining the apical margin; basal and apical margins straight, corners of apical and basal margin rounded, anterior 3/4 th of the lateral margin convex, posterior 1/4 th straight; deep median furrow; lateral bead narrow.</p> <p> <b>Elytra:</b> Subparallel, widest in the middle; humerus pronounced, rounded, humeral spot large; narrow median transverse band extending between 3 rd and 8 th stria, with strongly serrated edges, rounded and pointed towards suture; apical band narrow, reddish yellow, extending along the apical portion of stria; striations narrow, intervals wide, flat, glabrous.</p> <p> <b>Male Genitalia</b>: Median lobe slender compared to <i>P.devagiriensis</i> <b>sp. nov.</b>; highly arcuate, apex pointed.</p> <p> <b>Measurements</b>: <b>Holotype Male</b>, TLA= 16.16 mm; TLB= 15.84 mm; TW= 6.64 mm; PL = 3.28 mm; PW = 3.44 mm; EL = 9.52 mm.</p> <p> <b>Type Material</b>: 1 ex. Holotype, male, India: Kerala: Palakkad (10.806420°N, 76.690174°E), Hand Picking (wet paddy field), 26.XI.2017, coll. M. Divya, deposited at ZSIC.</p> <p>Paratype, male, India: Karnataka, 2013, coll. A. Anichtchenko.</p> <p> <b>Geographical distribution.</b> INDIA: Kerala: Palakkad; Karnataka</p> <p> <b>Collecting Circumstances</b>: Handpicked from a paddy field of Palakkad (India: Kerala), a region belonging to the Palakkad gap.</p> <p> <b>Etymology</b>: Named after ‘India’.</p> <p> <b>Remarks.</b> <i>Pheropsophus indicus</i> <b>sp. nov.</b> is similar to <i>P. occipitalis</i>, but differs in having broad ‘M’ shaped black spot on head, entirely black pronotum with straight apical and basal margins, broad elytra and narrow elytral median transverse band.</p>Published as part of <i>Venugopal, Akhil S. & Thomas, Sabu K., 2019, Bombardier beetles of the genus Pheropsophus Solier 1833 (Carabidae: Brachininae: Brachinini) from Indian subcontinent, pp. 65-89 in Zootaxa 4608 (1)</i> on page 86, DOI: 10.11646/zootaxa.4608.1.3, <a href="http://zenodo.org/record/3993611">http://zenodo.org/record/3993611</a>
Characterisation of a compound in-cis GATA2 germline mutation in a pedigree presenting with myelodysplastic syndrome/acute myeloid leukemia with concurrent thrombocytopenia
No full textLetter to the editorC N Hahn, P J Brautigan, C-E Chong, A Janssan, P Venugopal, Y Lee, A E Tims, M S Horwitz, M Klingler-Hoffmann, and H S Scot
Drag and inertia coefficients for horizontally submerged rectangular cylinders in waves and currents
No full textThe results of an experimental investigation carried out to measure combined wave and current loads on horizontally submerged square and rectangular cylinders are reported in this paper. The wave and current induced forces on a section of the cylinders with breadth-depth (aspect) ratios equal to 1, 0.5, and 0.75 are measured in a wave tank. The maximum value of Keulegan-Carpenter (KC) number obtained in waves alone is about 5 and Reynolds (Re) number ranged from 6.3976103 to 1.186105. The drag (CD) and inertia (CM) coefficients for each cylinder are evaluated using measured sectional wave forces and particle kinematics calculated from linear wave theory. The values of CD and CM obtained for waves alone have already been reported (Venugopal, V., Varyani, K. S., and Barltrop, N. D. P. Wave force coefficients for horizontally submerged rectangular cylinders. Ocean Engineering, 2006, 33, 11-12, 1669-1704) and the coefficients derived in combined waves and currents are presented here. The results indicate that both drag and inertia coefficients are strongly affected by the presenceof the current and show different trends for different cylinders. The values of the vertical component inertia coefficients (CMY) in waves and currents are generally smaller than the inertia coefficients obtained in waves alone, irrespective of the current's magnitude and direction. The results also illustrate the effect of a cylinder's aspect ratio on force coefficients. This study will be useful in the design of offshore structures whose columns and caissons are rectangular sections
Hydroxylaminato yttrate and samarate complexes
No full textVenugopal A, Willner A, Heppa A, Mitzel NW. Hydroxylaminato yttrate and samarate complexes. DALTON TRANSACTIONS. 2007;(29):3124-3126.The first homoleptic anions of hydroxylaminato ate-complexes of yttrium and samarium of the formulae K[M((ONPr2)-Pr-i)(4)] (M=Y, Sm) have been prepared and structurally characterised featuring variations of the hapticity of their (ONPr2)-Pr-i ligands leading to different chain connectivities in their solid state aggregates
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
Hydrodynamic performance of free surface semicircular breakwaters
No full textDifferent types of breakwaters have been developed in the past for the protection of valuable coastal
property, commercial activity and beach morphology. Among these, gravity-type breakwaters are the
most common and provide good surface wave attenuation. However, these breakwaters are not always
suitable due to their adverse impact on the coastal environment. To alleviate the problem, free surface
breakwaters with a variety of caisson designs have been proposed and developed. The main
advantages of such breakwaters are low capital cost, freedom from silting and scouring, short
construction period, circulation of water beneath the breakwater and exertion of relatively low
hydrodynamic forces on the structure as compared to conventional breakwaters. However, complete
tranquillity on the lee side is not likely to occur due to wave energy transfer through the permeable
parts of the breakwater. The degree of wave attenuation primarily depends on the configuration of the
breakwater, the water depth and the incident wave conditions. The hydrodynamic performance of such
free surface breakwaters is the subject of this thesis.
Semicircular breakwaters mounted on a low-crested rubble mound structure were successfully built
for harbour protection in Japan and China. However, the concept of having semicircular structures as
free surface breakwaters has not yet been explored by the research community. As a result, this
research is initiated with the aim of developing a free surface semicircular breakwater (SCB) that
would serve as an anti-reflection barrier and provide reasonably good wave protection to coastal and
marine infrastructures. To meet this research goal, a free surface SCB models were constructed and
tested in a wave flume under various wave conditions. The experiments were conducted in three
stages. For the first stage, the SCB model was initially tested without any perforations on the curved
surface (i.e. a solid SCB) for different depths of immersion from the still water level in the wave
flume. For the second stage, the front curved wall of the model was subsequently perforated with
rectangular openings of different dimensions, producing front wall porosity of 9, 18 and 27%.
Following this, two rows of rectangular openings near the crest of the rear curved wall were provided
so as to facilitate water infiltration and escape of the run-up waves. For the third stage, additional
effort was made to extend the draft of the breakwater by adding a wave screen at the front or/and rear.
The screen porosity was 25, 40 and 50%.
The hydrodynamic characteristics of the SCB models were investigated in both regular and irregular
seas through a series of systematic experimental programme. The water surface elevations were
measured at different locations upstream and downstream of the models to determine the coefficients
of wave transmission (CT), reflection (CR) and energy dissipation (CL) as well as the wave climate
coefficients in front and inside the breakwater chamber. The horizontal wave forces exerted on the
SCB models and the wave screen(s) were also measured and subsequently normalised to yield the
force coefficients in the analysis. These hydrodynamic coefficients for the respective test cases are
presented and discussed in this thesis.
The experimental results revealed that even though the solid SCB was a better wave attenuator than
the perforated ones, it produced a considerable amount of wave reflection. The perforated SCB with
9% porosity of the front wall (denoted as SCB9) outperformed the other perforated breakwater
models; however, it produced high wave transmission when the draft was limited and subjected to
longer period waves. Hence, wave screens were added to further enhance the performance of the
SCB9. The SCB9 with double screens of 25% porosity was found to provide the highest hydraulic
performance.
Empirical equations were developed using a multiple regression technique to provide design formulae
for wave transmission, wave reflection and horizontal wave forces. The proposed empirical equations
showed good agreement with the experimental data. These equations are intended to be of direct use
to engineers in predicting the hydrodynamic performance of free surface SCBs. However, sensible
engineering judgement must be taken while using these equations as they are based on small scale
laboratory tests
"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
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