15,083 research outputs found
Remembering David J. Rowe
No full textDavid Rowe was a highly respected theoretical physicist who made seminal contributions that improved our understanding of the atomic nucleus, in particular of the collective behaviour of its constituent nucleons - results he often obtained with the use of sophisticated group-theoretical methods. He will also be remembered as the (co-)author of monographs on nuclear physics, written with the scientific rigour that was characteristic of his research
Remembering David J. Rowe
No full textInternational audienceDavid Rowe was a highly respected theoretical physicist who made seminal contributions that improved our understanding of the atomic nucleus, in particular of the collective behaviour of its constituent nucleons - results he often obtained with the use of sophisticated group-theoretical methods. He will also be remembered as the (co-)author of monographs on nuclear physics, written with the scientific rigour that was characteristic of his research
Self-Direction in Physics Graduate Education: Insights for STEM from David J. Rowe’s Career-Long Methods
No full textThe ability to self-direct a research program determines graduate degree completion. Yet, research on incompletion of science, technology, engineering, and mathematics (STEM) graduate programs assumes students’ present level of self-direction adequate and neglects to recognize a lack of self-directed learning (SDL) as key. This essay explores SDL for STEM, presenting the work of theoretical nuclear physicist David J. Rowe as a key example of applying a process of SDL in practice. Rowe focused on this challenge of physics graduate education by promoting SDL through the type of research flow that has been found to bring the greatest satisfaction to researchers regarding their insights. Strategies he explored involved his space, time, open mindedness and theoretical contributions with students and in collaboration with colleagues. A self-directed learner himself, Rowe developed methods of mentoring for encouraging physics graduate students to recognize symmetry as valuable in identifying solutions to problems quickly—helping students take the lead in finding insightful resolutions to complex, multidimensional, mathematical physics uncertainties. These strategies for supporting SDL in this context are examined here, with the use of narrative research to interpret the texts and conversations exchanged with the author. The process of SDL developed by Rowe is presented with recommendations on how Rowe’s methods may be modeled to improve self-direction in STEM graduate education more widely
A new species of<i>Asterodiscides</i>(Echinodermata, Asteroidea, Asterodiscididae) from the tropical southwest Pacific, and the biogeography of the genus revisited
No full textLane, David J. W., Rowe, Frank W. E. (2009): A new species of Asterodiscides (Echinodermata, Asteroidea, Asterodiscididae) from the tropical southwest Pacific, and the biogeography of the genus revisited. Zoosystema 31 (3): 419-429, DOI: 10.5252/z2009n3a2, URL: http://www.bioone.org/doi/abs/10.5252/z2009n3a
Evolution of cooperation among tumor cells
No full textThe evolution of cooperation has a well established theoretical framework based on game theory. This approach has made valuable contributions to a wide variety of disciplines, including political science, economics, and evolutionary biology. Existing cancer theory suggests that individual clones of cancer cells evolve independently from one another, acquiring all of the genetic traits or hallmarks necessary to form a malignant tumor. It is also now recognized that tumors are heterotypic, with cancer cells interacting with normal stromal cells within the issue microenvironment, including endothelial, stromal, and nerve cells. This tumor cell???stromal cell interaction in itself is a form of commensalism, because it has been demonstrated that these nonmalignant cells support and even enable tumor growth. Here, we add to this theory by regarding tumor cells as game players whose interactions help to determine their Darwinian fitness. We marshal evidence that tumor cells overcome certain host defenses by means of diffusible products. Our original contribution is to raise the possibility that two nearby cells can protect each other from a set of host defenses that neither could survive alone. Cooperation can evolve as byproduct mutualism among genetically diverse tumor cells. Our hypothesis supplements, but does not supplant, the traditional view of carcinogenesis in which one clonal population of cells develops all of the necessary genetic traits independently to form a tumor. Cooperation through the sharing of diffusible products raises new questions about tumorigenesis and has implications for understanding observed phenomena, designing new experiments, and developing new therapeutic approaches.Author manuscript. Published in final edited form as: Proc Natl Acad Sci U S A. 2006 September 5; 103(36): 13474-13479.The final published version of this article is located at: www.pnas.org/cgi/doi/10.1073/pnas.0606053103NIH U56 CA113004; to David E. AxelrodR.A. was supported by National Science Foundation (NSF) Grant SES-0240852. D.E.A. was supported by NSF Grant IIS-0312953, National Institutes of Health (NIH) Grant U56 CA113004, and New Jersey Commission on Cancer Research Grant 1076-CCR-SO. K.J.P. is an American Cancer Society Clinical Research Professor and is supported by NIH Grants CA69568, CA102872, and CA093900.NIH CA69568; to Kenneth J. PientaNIH CA102872; to Kenneth J. PientaNIH CA093900; to Kenneth J. PientaNSF SES-0240852; to Robert AxelrodNJ Commission on Cancer Research 1076-CCR-SO; to David E. AxelrodAlso available in PubMed Central. PMCID: PMC155738
Rynkatorpa Rowe and Pawson 1967
No full textGenus <i>Rynkatorpa</i> Rowe and Pawson, 1967 <p> <b>Diagnosis</b>: Anchor plates more or less irregular in outline, tending to be rectangular, with small number of perforations (25–50), of which two near center line are usually conspicuously larger than the rest; perforations with smooth to spinous margins. One to three Polian vesicles. (After Rowe and Pawson, 1967).</p> <p> <b>Type Species</b>: <i>Rynkatorpa hickmani</i> Rowe and Pawson, 1967</p> <p> <b>Remarks:</b> Rowe and Pawson (1967) listed eight Indo­Pacific species in this genus. Since 1967, three further Indo­Pacific species have been described: <i>R. pawsoni</i> (Martin, 1969a, 1969b), <i>R. gibbsi</i> (Rowe, 1977), and <i>R. coriolisi</i> (Smirnov, 1997). Of the 11 species now known in the genus, four, <i>hickmani</i> Rowe & Pawson, <i>bisperforatus</i> (Clark), <i>gibbsi</i> Rowe, and <i>uncinata</i> (Hutton) are essentially shallow­water forms, known from less than 100 meters depth. The other seven species, <i>bicornis</i> (Sluiter), <i>sluiteri</i> (Fisher), <i>timida</i> (Koehler & Vaney), <i>challengeri</i> (Théel), <i>coriolisi</i> Smirnov, <i>pawsoni</i> Martin, and <i>duodactyla</i> (Clark) are bathyal forms, ranging in depth from 252 to 1,920 meters. It is indeed surprising to find this genus in the Atlantic. Its nearest congeneric neighbors are <i>R. pawsoni</i> and <i>R. duodactyla</i> (Clark); both occur off the west coast of North America, and both differ from <i>R. felderi</i> new species in possessing just one pair of terminal tentacle digits.</p>Published as part of <i>Pawson, David L. & Vance, Doris J., 2005, Rynkatorpa felderi, new species, from a bathyal hydrocarbon seep in the northern Gulf of Mexico (Echinodermata: Holothuroidea: Apodida), pp. 15-20 in Zootaxa 1050</i> on page 16, DOI: <a href="http://zenodo.org/record/169978">10.5281/zenodo.169978</a>
The Arts Interview. Dr. David Pitt : The Truant Years, E. J. Pratt
No full textHost Fred Hollingshurst interviews Dr. David Pitt of Memorial University, who discusses the life and work of Newfoundland poet E. J. Pratt. Pitt is the author of E. J. Pratt: The Truant Years, 1881-1927
Prediction of Neonatal Respiratory Distress Biomarker Concentration by Application of Machine Learning to Mid Infrared Spectra
No full textDataset to support article by Ahmed, W.; Veluthandath, A.V.; Rowe, D.J.; Madsen, J.; Clark, H.W.; Postle, A.D.; Wilkinson, J.S.; Murugan, G.S. Prediction of Neonatal Respiratory Distress Biomarker Concentration by Application of Machine Learning to Mid-Infrared Spectra. In "Sensors" 2022, 22, 1744.</span
Novel coupling structure for the resonant coaxial probe
No full textHerein we present a technique for performing complex permittivity measurements with an overmoded, evanescently perturbed coaxial resonator at microwave frequencies. The design of a noninvasive electromagnetic coupling structure, which allows transmission measurements to be taken from one end of a resonant section of coaxial cable, is discussed in detail. Quasi-spectral information was obtained through the exploitation of higher order resonances, and complex permittivity measurements of a number of common industrial solvents were taken at multiple discrete frequencies between 1 and 8 GHz. A combination of experimental and simulated results was used also to characterise the device behavior. The high stability of temporal measurements, coupled with the robustness of the design, make this device ideal for analytical chemistry and industrial process control
Microfluidic device for compositional analysis of solvent systems at microwave frequencies
No full textA device for analysing the chemical composition of single- and multi-phase solvent flows using microfluidic dielectric spectroscopy is demonstrated in this work. An open-circuited, half-wavelength, coaxial resonator operating at microwave frequencies (i.e. harmonics of 600 MHz) was embedded in a compression-sealed polytetrafluoroethylene microfluidic chip for in situ characterization of solvent–solvent and solute–solvent mixtures of varying concentration, and an aqueous–organic segmented flow. Results are shown for a solvent mixture of acetonitrile in toluene as a test system, exhibiting a sensitivity limit of 400 nM. In addition to being highly sensitive, the measurement system is fast, robust and non-invasive, and can be readily miniaturized
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