12,603 research outputs found
Optimal beaconing control for epidemic routing in delay tolerant networks
No full textOwing to the uncertainty of transmission opportunities between mobile nodes, the routing in delay-tolerant networks (DTNs) exploits the mechanism of opportunistic forwarding. Energy-efficient algorithms and policies for DTN are crucial to maximizing the message delivery probability while reducing the delivery cost. In this contribution, we investigate the problem of energy-efficient optimal beaconing control in a DTN. We model the message dissemination under variable beaconing rate with a continuous-time Markov model. Based on this model, we then formulate the optimization problem of the optimal beaconing control for epidemic routing and obtain the optimal threshold policy from the solution of this optimization problem. Furthermore, through extensive numerical results, we demonstrate that the proposed optimal threshold policy significantly outperforms the static policy with constant beaconing rate in terms of system energy consumption savings
Coauthor prediction for junior researchers
No full textResearch collaboration can bring in different perspectives and generate more productive results. However, finding an appropriate collaborator can be difficult due to the lacking of sufficient information. Link prediction is a related technique for collaborator discovery; but its focus has been mostly on the core authors who have relatively more publications. We argue that junior researchers actually need more help in finding collaborators. Thus, in this paper, we focus on coauthor prediction for junior researchers. Most of the previous works on coauthor prediction considered global network feature and local network feature separately, or tried to combine local network feature and content feature. But we found a significant improvement by simply combing local network feature and global network feature. We further developed a regularization based approach to incorporate multiple features simultaneously. Experimental results demonstrated that this approach outperformed the simple linear combination of multiple features. We further showed that content features, which were proved to be useful in link prediction, can be easily integrated into our regularization approach. © 2013 Springer-Verlag
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
CENP-G in neocentromeres and inactive centromeres
No full textCENP-G is a novel constitutive centromere-specific protein localized to the kinetochore inner plate and subjacent region. It has been identified as associating specifically with the α-1 subfamily of α-satellite DNA. In the present work, the localization of CENP-G was compared with that of other CENPs by immunofluorescence and fluorescence in situ hybridization. Studies were carried out on four abnormal human centromeres:
two neocentromeres and two inactive centromeres.
CENP-G was detected in one of the two inactive centromeres but not in the other that shows a partial deletion of the alphoid DNA. Interestingly, CENP-G is also present in neocentromeres, which lack alphoid DNA sequences, and in the human Y chromosome, which lacks the α-1 type of satellite DNA. These data provide further evidence that CENP-G may be an essential factor in cen-
tromeric function and that in centromeres lacking the α-1 subfamily of alphoid DNA, other DNA sequences are able to bind CENP-G
FIGURE 2. Bredia bullata. A in Bredia bullata (Melastomataceae), a new species from limestone areas in Yunnan, China
No full textFIGURE 2. Bredia bullata. A: flowering branch; B: part of stem with a pair of petioles; C: part of leaf blade, adaxial view; D: part of leaf blade, abaxial view; E: flower bud; F: hypanthium with style, showing ovary; G: petals, adaxial view (left) and abaxial view (right); H: longer stamens, front view (left) and side view (right); I: shorter stamens, front view (left) and side view (right); J: capsule, top view. Scale bars: 5 mm. A–I based on Si-Jin Zeng 5017 (IBSC), and J based on Si-Jin Zeng 902 (IBSC). Drawn by Ding-Han Cui.Published as part of Zeng, Si-Jin, Tong, Yi-Hua & Xia, Nian-He, 2022, Bredia bullata (Melastomataceae), a new species from limestone areas in Yunnan, China, pp. 279-286 in Phytotaxa 550 (3) on page 283, DOI: 10.11646/phytotaxa.550.3.8, http://zenodo.org/record/665108
FIGURE 3. Bredia bullata. A in Bredia bullata (Melastomataceae), a new species from limestone areas in Yunnan, China
No full textFIGURE 3. Bredia bullata. A: green individuals; B: brownish individual; C: part of stem with a pair of petioles showing indumentum; D: adaxial part of leaf blade, showing the bullate structure with white spots; E: abaxial part of leaf blade showing indumentum; F: flower buds, showing calyx lobes; G: umbellate inflorescence with opening flowers; H: infructescence; I: dried capsules, top view. F–G from Si-Jin Zeng 5017 (IBSC) and A–E & H–I from Si-Jin Zeng 902 (IBSC).Published as part of Zeng, Si-Jin, Tong, Yi-Hua & Xia, Nian-He, 2022, Bredia bullata (Melastomataceae), a new species from limestone areas in Yunnan, China, pp. 279-286 in Phytotaxa 550 (3) on page 284, DOI: 10.11646/phytotaxa.550.3.8, http://zenodo.org/record/665108
Zeng et al 2021 EBiomedicine modifiable POE
No full text## Access ## This dataset is held in the Edinburgh DataVault, directly accessible only to authorised University of Edinburgh staff. External users may request access to a copy of the data by contacting the Principal Investigator, Contact Person or Data Manager named on this page. University of Edinburgh users who wish to have direct access should consult the information about retrieving data from the DataVault at: https://www.ed.ac.uk/is/research-support/datavault .Data relating to publication Lifestyle and Genetic Factors Modify Parent-of-Origin Effects on the Human Methylome... Zeng, Y., Amador, C., Gao, C., Walker, R. M., Morris, S. W., Campbell, A., Frkatović, A., Madden, R. A., Adams, M. J., He, S., Bretherick, A. D., Hayward, C., Porteous, D. J., Wilson, J. F., Evans, K. L., McIntosh, A. M., Navarro, P., & Haley, C. S. (2021). Lifestyle and Genetic Factors Modify Parent-of-Origin Effects on the Human Methylome. EBioMedicine, 74, [103730]. https://doi.org/10.1016/j.ebiom.2021.10373
FIGURE 4 in Buchwaldoboletus xylophilus and Phlebopus portentosus, two non-ectomycorrhizal boletes from tropical China
No full textFIGURE 4. Basidiomata of Phlebopus portentosus. (a from FHMU5934; b, c, f from FHMU753; e, g from FHMU1768; d from FHMU5936. a–c, e, f photos by N.K. Zeng; d photo by X.J. Xu.Published as part of Xie, Hui-Jing, Zhang, Chun-Xia, He, Ming-Xia, Liang, Zhi-Qun, Deng, Xiao-Hua & Zeng, Nian- Kai, 2021, Buchwaldoboletus xylophilus and Phlebopus portentosus, two non-ectomycorrhizal boletes from tropical China, pp. 137-154 in Phytotaxa 520 (2) on page 147, DOI: 10.11646/phytotaxa.520.2.2, http://zenodo.org/record/550880
Photoproduction and radiative decay of spin 1/2 and 3/2 pentaquarks
No full textWe study photoproduction and radiative decays of pentaquarks paying particular attention to the differences between spin-1/2 and spin-3/2, positive and negative parities of pentaquarks. Detailed study of these processes can not only give crucial information about the spin, but also the parity of pentaquarks.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)5ARTICLE1null7
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