45,451 research outputs found
Reviewer recommendations and editors' decisions for a conservation journal: Is it just a crapshoot? And do Chinese authors get a fair shot?
No full textAbstract not available.Ahimsa Campos-Arceiz, Richard B. Primack, Lian Pin Ko
Letter from Arno B. Cammerer to J. R. Eakin
No full textLetter from Arno B. Cammerer to J. R. Eakin describing the procedure for purchasing Bright Angel Trail
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
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
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
Convex B-Spline Surfaces
No full textThis paper gives a definition for the convexity of B-spline surfaces and points out the conditions on which the convexity depends. A back shift smoothing method is introduced. This method is built on the basis of the convexity conditions. Application of this smoothing method gives a strictly convex curv
Measurement of b-hadron masses
No full textMeasurements of b-hadron masses are performed with the exclusive decay modes B +→J/ψK +, B 0→J/ψK +, B0→J/ψKS0, Bs0→J/ψφ and Λb0→J/ψΛ using an integrated luminosity of 35pb -1 collected in pp collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with J/ψ→μ +μ - decays and verified to be known to a relative precision of 2 ×10 -4 using other two-body decays. The results are more precise than previous measurements, particularly in the case of the Bs0 and Λb0 masses
Waterpipe tobacco and cigarette smoking among university students in Jordan
No full textSETTING: While waterpipe and cigarette smoking have been well studied in Syria and Lebanon, data from Jordan are limited. OBJECTIVES: To characterize the relative prevalence of waterpipe tobacco and cigarette smoking among university students in Jordan, and to compare the demographic and environmental factors associated with each form of tobacco use. DESIGN: We surveyed 1845 students randomly recruited from four universities in Jordan. We used multivariable logistic regression controlling for clustering of individuals within universities to determine associations between demographic and environmental covariates and waterpipe tobacco and cigarette use. RESULTS: Waterpipe tobacco smoking rates were 30percent in the past 30 days and 56percent ever, while cigarette smoking rates were 29percent in the past 30 days and 57percent ever. Past 30-day waterpipe tobacco smoking rates were 59percent for males and 13percent for females. Females had substantially lower odds than males of being current waterpipe (OR 0.12, 95percentCI 0.10-0.15) or cigarette (OR 0.08, 95percentCI 0.05-0.14) smokers. Current cigarette smoking was more significantly associated with markers of high socioeconomic status (SES) than waterpipe tobacco smoking. CONCLUSION: Waterpipe tobacco smoking is as common as cigarette smoking among Jordanian university students. While cigarette smoking is consistently associated with high SES, waterpipe tobacco smoking is more evenly distributed across various populations. © 2012 The Union.Afifi RA, 2010, EUR J PUBLIC HEALTH, V20, P456, DOI 10.1093-eurpub-ckp173; Akl EA, 2010, INT J EPIDEMIOL, V39, P834, DOI 10.1093-ije-dyq002; Almerie MQ, 2008, INT J TUBERC LUNG D, V12, P1085; Al Rashidi M, 2008, FOOD CHEM TOXICOL, V46, P3546, DOI 10.1016-j.fct.2008.09.007; Azab M, 2010, NICOTINE TOB RES, V12, P606, DOI 10.1093-ntr-ntq055; Barnett TE, 2009, AM J PUBLIC HEALTH, V99, P2014, DOI 10.2105-AJPH.2008.151225; Cobb C, 2010, AM J HEALTH BEHAV, V34, P275; Dar-Odeh NS, 2010, HARM REDUCT J, V7, DOI 10.1186-1477-7517-7-10; Dugas E, 2010, PEDIATRICS, V125, P1184, DOI 10.1542-peds.2009-2335; Eissenberg T, 2009, AM J PREV MED, V37, P518, DOI 10.1016-j.amepre.2009.07.014; Eissenberg T, 2008, J ADOLESCENT HEALTH, V42, P526, DOI 10.1016-j.jadohealth.2007.10.004; Jensen PD, 2010, SUBST USE MISUSE, V45, P1245, DOI 10.3109-10826081003682909; Khabour OF, 2011, ENVIRON MOL MUTAGEN, V52, DOI 10.1002-em.20601; Khader Y. S., 2008, Eastern Mediterranean Health Journal, V14, P897; Knishkowy B, 2005, PEDIATRICS, V116, pE113, DOI 10.1542-peds.2004-2173; Lee D, 2007, ADDICT BEHAV, V32, P332, DOI 10.1016-j.addbeh.2006.05.002; Mandil Ahmed, 2010, J Infect Public Health, V3, P179, DOI 10.1016-j.jiph.2010.10.003; Maziak W, 2009, NICOTINE TOB RES, V11, P806, DOI 10.1093-ntr-ntp066; Maziak W, 2004, INT J TUBERC LUNG D, V8, P882; Maziak W, 2004, TOB CONTROL, V13, P327, DOI 10.1136-tc.2004.008169; Memon A, 2000, B WORLD HEALTH ORGAN, V78, P1306; Mohammed H. R., 2010, Eastern Mediterranean Health Journal, V16, P1115; Neergaard J, 2007, NICOTINE TOB RES, V9, P987, DOI 10.1080-14622200701591591; Noar SM, 2005, HEALTH EDUC RES, V20, P275, DOI 10.1093-her-cyg113; Parna K, 2008, BMC PUBLIC HEALTH, V8, DOI 10.1186-1471-2458-8-392; Primack BA, 2010, J ADOLESCENT HEALTH, V46, P45, DOI 10.1016-j.jadohealth.2009.05.004; Primack BA, 2009, PEDIATRICS, V123, pE282, DOI 10.1542-peds.2008-1663; Primack BA, 2008, ANN BEHAV MED, V36, P81, DOI 10.1007-s12160-008-9047-6; Saade Georges, 2009, J Med Liban, V57, P243; Sepetdjian E, 2008, FOOD CHEM TOXICOL, V46, P1582, DOI 10.1016-j.fct.2007.12.028; Shafagoj YA, 2002, INT J CLIN PHARM TH, V40, P249; Shihadeh A, 2005, FOOD CHEM TOXICOL, V43, P655, DOI 10.1016-j.fct.2004.12.013; Smith-Simone S, 2008, NICOTINE TOB RES, V10, P393, DOI 10.1080-14622200701825023; Tamim H, 2003, ADDICTION, V98, P933, DOI 10.1046-j.1360-0443.2003.00413.x; Ward KD, 2006, TOB CONTROL, V15, pi248111
Conservation planning for connectivity across marine, freshwater, and terrestrial realms
No full textConservation plans are usually developed for regions that encompass only one environmental realm (terrestrial,
freshwater or marine) because of logistical, institutional and political constraints. This is inadequate
because these realms often interact through processes that form, utilize and maintain interfaces or
connections, which are essential for the persistence of some species and ecosystem functions. We present
a conceptual framework for systematic conservation prioritization that explicitly accounts for the connectivity
between the terrestrial, marine, and freshwater realms. We propose a classification of this connectivity
that encompasses: (1) narrow interfaces, such as riparian strips; (2) broad interfaces, such as
estuaries; (3) constrained connections, such as corridors of native vegetation used by amphibians to
move between natal ponds and adult habitat; and (4) diffuse connections, such as the movements of animals
between breeding and feeding habitats. We use this taxonomy of inter-realm connectivity to
describe existing and new spatial conservation prioritization techniques that aim to promote the persistence
of processes that operate between realms
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