74,001 research outputs found
Frequency domain iterative feedforward/feedback tuning for MIMO ANVC
No full textA new iterative feedback/feed-forward tuning (IFFT) method is presented for multiple-input multiple-output (MIMO) control systems that relies on efficient computation of the negative gradient of the controller cost function in the frequency domain. The iterative method is using only one experiment per iteration and it is therefore suitable for realtime implementation for periodic adjustment of the controller. The primary target application area of the presented method is self-tuning feedback control in active noise and vibration control (ANVC)
Study of the decay mechanism for B+ -> p(p)over-barK(+) and B+ -> p(p)over-bar pi(+)
No full textWe study the characteristics of the low mass p (p) over bar enhancements near threshold in the three-body decays B+ -> p (p) over barK(+) and B+ -> p (p) over bar pi(+). We observe that the proton polar angle distributions in the p (p) over bar helicity frame in the two decays have the opposite polarity, and measure the forward-backward asymmetries as a function of the p mass for the p (p) over barK(+) mode. We also search for the intermediate two-body decays, B+ -> (p) over bar Delta(++) and B+ -> p (Delta) over bar (0), and set upper limits on their branching fractions. These results are obtained from a 414 fb(-1) data sample that contains 449 x 10(6) B (B) over bar events collected near the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. (c) 2007 Elsevier B.V. All rights reserved.IPE
A network resource availability model for IEEE802.11a/b-based WLAN carrying different service types
No full textAbstract Operators of integrated wireless systems need to have knowledge of the resource availability in their different access networks to perform efficient admission control and maintain good quality of experience to users. Network availability depends on the access technology and the service types. Resource availability in a WLAN is complex to gather when UDP and TCP services co-exist. Previous study on IEEE802.11a/b derived the achievable throughput under the assumption of inelastic and uniformly distributed traffic. Further study investigated TCP connections and derived a model to calculate the effective transmission rate of packets under the assumption of saturated traffic flows. The assumptions are too stringent; therefore, we developed a model for evaluating WLAN resource availability that tries to narrow the gap to more realistic scenarios. It provides an indication of WLAN resource availability for admitting UDP/TCP requests. This article presents the assumptions, the mathematical formulations, and the effectiveness of our model.</p
Simulation results of 3D ETS (Episodic Tremor and Slow-slip) asperity-in-matrix model using QDYN earthquake simulator
No full textThis data set contains simulation results of 3D ETS asperity-in-matrix model of Matlab .mat files for
Luo, Y., and Liu, Z. (2021) Fault Zone Heterogeneities Explain Depth-dependent Pattern and Evolution of Slow Earthquakes in Cascadia, Nature Communications.
It is generated by QDYN earthquake simulator (https://github.com/ydluo/qdyn Luo, Y., Ampuero, J. P., Galvez, P., Van den Ende, M., and Idini, B. (2017). QDYN: a Quasi-DYNamic earthquake simulator (v1. 1). Zenodo.(doi: 10.5281/zenodo. 322459).)
1. Uniform Model (10 years, dense output, Uniform_model/)
2. Binary (Bi-modular) Model (4 years, Binary_model/)
3. Linear Model (40 years, dense output, Linear_model/)
4. Comparison of asperity distributions (asp_patttern/):
4.1 (asp_patttern/tri/) - hexagon pattern asperity distribution
4.2 (asp_patttern/sqr/) - rectangular pattern asperity distribution
4.2 (asp_patttern/rnd/) - random asperity distribution
File format: (see details in documents of QDYN)
p - model settings
ot0, ot3d: timeseries outputs
ox0, ox3d: snapshot outputs<br
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Cuora aurocapitata Luo & Zong 1988
No full text<i>Cuora aurocapitata</i> Luo & Zong 1988:13 <p> <b>Holotype:</b> SNHM 87 /012 (photographed in the original description, p. 14); <b>paratypes</b> (2), SMNH 87/010-11.</p> <p> <b> <i>Cuora aurocapitata dabieshani</i> Blanck, Protiva, Zhou, Li, Crow, & Teidemann 2017:382</b> </p> <p> <b>Holotype</b>: NMW 32987:2 (photographed in the original description, p. 25).</p>Published as part of <i>Iverson, John B., 2022, A review of Chelonian type specimens (order Testudines), pp. 1-85 in Megataxa 7 (1)</i> on page 21, DOI: 10.11646/megataxa.7.1.1, <a href="http://zenodo.org/record/5964441">http://zenodo.org/record/5964441</a>
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
Synthesis of a Toolbox of Clickable Rhodamine B Derivatives
No full textAn efficient method for the large-scale preparation of rhodamine B clickable derivatives has been developed. Starting from inexpensive rhodamine B as the starting material it was possible to functionalize the carboxylic functionality of rhodamine B with an azide, a strained-alkyne, a substituted triphenylphosphine, a thiol, and a maleimide. Through the synthetic strategy it was possible to obtain stable and pure clickable rhodamine compounds that can be readily used not only for chemoselectively probing biomolecules, but also for materials science
Lepadella hanneloreae Luo & Segers 2020, n. sp.
No full text<i>Lepadella hanneloreae</i> n. sp. <p>Figures 5 a–c, I-4</p> <p> <b>Type locality.</b> Lohulu River near Bomane, DR Congo 24 May 2010 (KM49, KM48); a few specimens from Yangambi primary forest, DR Congo, 11 June 2012 (Y25). Numerous additional specimens in the samples from the type locality.</p> <p> <b>Material examined.</b> Holotype: female specimen in permanent slide, deposited in RBINS (RIR.292); Paratypes: seven permanent slides containing one female specimen each, deposited in RBINS; five permanent slides containing two female specimens each, deposited in RBINS (RIR.293 to RIR.304), one permanent slide containing three female specimens, deposited in CSB-UK.</p> <p> <b>Differential diagnosis.</b> <i>Lepadella hanneloreae</i> <b>n. sp.</b> is strikingly similar to <i>L. amazonica</i> Segers, 1993 (in Segers <i>et al</i>. 1993b). The two differ by the dorsal carinae on the lorica: in <i>L. hanneloreae</i> <b>n. sp.</b> there is one pair of middorsal and one pair of lateral carinae, whereas in <i>L. amazonica</i> there are two pairs of closely adjacent lateral carinae. Furthermore, the new species is probably related to <i>L. berzinsi</i> Segers, 1993, but the latter has three pairs of more pronounced carinae situated at regular distances from each other.</p> <p> <b>Description.</b> Parthenogenetic female (male unknown): Lorica elongate, roughly egg-shaped, width about two thirds of length. Ventral lorica flat, dorsal domed, lorica about twice as wide as high. Head aperture ventrally a deep V-shaped sinus, dorsally semi-circular in anterior view, straight in ventral view, with stippled collar. Dorsal lorica with two pairs of longitudinal carinae: one median pair, fused in the distal third of the lorica, one lateral pair running from behind the collar to approximately level of the apertures to the dorsal antennas. Lateral edges of lorica smooth, evenly curved, posterior edge nearly straight or with a shallow median notch. Apertures to the lateral antennas situated at the level of the anterior margin of the foot aperture, arranged symmetrically about medially from the fused median carinas to the lateral margin of the lorica. Foot aperture elongate, lateral margins nearly parallel. Foot with three distinct pseudosegments, the distal one about twice as long as the second, bearing a dorsal sensory groove near its basis. Two equal toes, these evenly tapering to distally.</p> <p> <b>Measurements</b> (n=10). Lorica length: 91–106 (100), width: 60–70 (67); head aperture width: 23–37 (29), head aperture depth dorsally: 7–14 (10), ventrally: 19–24 (21); foot aperture width: 18–20 (19), length: 23–33 (27), toe length: 22–29 (25).</p> <p> <b>Etymology.</b> The specific name is as a noun in the genitive case, after Mrs Hannelore Segers, daughter of the second author of this paper.</p>Published as part of <i>Luo, Yongting & Segers, Hendrik, 2020, Eight new Lepadellidae (Rotifera, Monogononta) from the Congo bring to level endemism in Africa's rotifers, pp. 371-387 in Zootaxa 4731 (3)</i> on pages 374-376, DOI: 10.11646/zootaxa.4731.3.6, <a href="http://zenodo.org/record/3653632">http://zenodo.org/record/3653632</a>
Bifurcation into spectral gaps for strongly indefinite Choquard equations
No full textIn this paper, we consider the semilinear elliptic equations(-delta u +V(x)u= (I-alpha * |u|(p))|u|(p-2)u + lambda u for x is an element of R-N,u(x) -> 0 as |x| -> infinity,where I alpha is a Riesz potential, p is an element of (N+alpha/N, N+alpha/N-2 ), N >= 3 and V is continuous periodic. We assume that 0 lies in the spectral gap (a, b) of -delta + V. We prove the existence of infinitely many geometrically distinct solutions in H-1(R-N) for each lambda is an element of (a, b), which bifurcate from b if N+alpha/N < p < 1+2+alpha/N. Moreover, b is the unique gap-bifurcation point (from zero) in [a,b]. When lambda=a, we find infinitely many geometrically distinct solutions in H-loc(2)(R-N). Final remarks are given about the eventual occurrence of a bifurcation from infinity in lambda = a
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