1,721,948 research outputs found
Physical interpretation of the NGC 7469 UV/X-ray variability
No full textWe present a re-analysis of the simultaneous ∼30 day IUE/XTE observation of NGC 7469 done in 1996. Our main progress in this paper, in comparison to previous spectral analyses (Nandra et al. 1998, 2000), is to adopt and fit directly to the data a detailed model of the Comptonized spectrum. This firstly allows one to fit simultaneously the data from the UV to the hard X-ray band in a self-consistent way and secondly it gives direct constraints on the physical parameters of the disc-corona system, like the temperature and optical depth of the corona. Our results are completely consistent with a slab geometry where all the observed UV emission is supposed to cross the corona but more photon-starved geometries also give acceptable fits. Whatever the geometry, the UV seed photon emission appears to be dominated by the reprocessing of the X-rays. We also found very interesting correlations between the different model parameters, the most important one being the anticorrelation between the corona temperature kTe and the UV flux FUV. Such an anticorrelation is clearly inconsistent with a fixed disc-corona configuration and suggests a variation of the geometry of the system. We also find a correlation between the corona optical depth and the X-ray flux which may reflect processes linked to the corona formation. During the observations, NGC 7469 appears to accrete near its Eddington limit. This source could then be an example of magnetically dominated disc-corona system as recently proposed by Merloni (2003). Finally, these data strongly support the presence of a pair free corona
Paduniella nandra Johanson & Oláh, 2010, new species
No full textPaduniella nandra, new species Figs 4–6 The genitalia of P. nandra resemble those of P. ankya and P. filamentosa in lateral view in the presence of a broad ventral branch of the inferior appendages. It is distinguished from the two species by possessing a tapering main branch of the inferior appendages in lateral view. Male genitalia (Figs 4–6). Sternite IX narrowly club-shaped in lateral view; both ventral arms with almost straight anterior and posterior margin, 3 times longer than wide, nearly 0.2 mm long; without swelling at posterior apex; both dorsal arms narrow, needle-shaped, slightly S-shaped, oriented anterad before curving dorsad, joined with tergite IX at mid-dorsal part of genitalia, about 0.35 mm long. Ventral and dorsal arms forming right angle. Tergite IX long, wide, smooth; slightly narrowing distad in lateral view; dorsal and ventral margins nearly straight; nearly 0.45 mm long. Superior appendages originating ventroapically on tergite IX; margins parallel, about half as wide as widest part of sternite IX; straight; setae apparently restricted to distal half; apex rounded. Median branch of inferior appendages invisible in lateral view; originating about at mid-length of main branch in ventral view; widening from base into bilobed apex; mesal apical lobe narrow, lateral apical lobe wide; covered by setae, especially along mesal margin; about 0.1 mm long. Ventral lobe of inferior appendages forming rounded lobe in lateral view; forming pair of about 0.1 mm long tapering processes covered by setae in ventral view. Main branch of inferior appendages narrowing stepwise apically in lateral view; proximal part about as wide as tergite IX in lateral view; distal one-fourth about as wide as superior appendages in lateral view; generally curving slightly ventrad along entire length; about 0.35 mm long. Phallic apparatus connected to sternite IX and tergite IX by long, straight, dorsally narrowing sternal strips; sternal strip with convex anterodorsal margin and nearly straight posteroventral margin, about 0.25 mm long. Phallobase short, rectangular. Median processes more than 0.6 mm long; needleshaped, with row of dorsal teeth before apex; bow-shaped in lateral view; apex not exceeding phallicata. Phallicata about 0.5 mm long; proximal one-third uniformly slender, straight; double as wide at mid-length, widening toward ventrally curved apex, with concave ventral margin, dorsal margin undulating. Paramere separated from phallicata well posterior of phallobase; very thin, straight along its length, except curving at apex; running parallel with proximal part of phallicata, exceeding phallicata; about 0.55 mm long. Holotype male, Namoroka, Vilanandro, ix. 1952 [R. Paulian] (MNHN, alcohol). Paratypes: Same data as holotype, 2 females (MNHN, alcohol), 1 male (NHRS, alcohol). Distribution. Madagascar (Province Mahajanga). Etymology. The name, nandra, is derived from Vilanandro, the type locality.Published as part of Johanson, Kjell Arne & Oláh, János, 2010, Descriptions of five new species of Paduniella from Madagascar (Trichoptera: Psychomyiidae), pp. 54-62 in Zootaxa 2338 on pages 56-57, DOI: 10.5281/zenodo.19325
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
PERBEDAAN KADAR CRP PADA PASIEN KETUBAN PECAH DINI PRETERM KORIOAMNIONITIS DENGAN PASIEN KETUBAN PECAH DINI PRETERM TANPA KORIOAMNIONITIS
Get PDFABSTRACT
DIFFERENT CRP LEVELS IN PATIENTS PRETERM PREMATURE RUPTURE OF CHORIOAMNIONITIS WITH PATIENTS PRETERM PREMATURE RUPTURE WITHOUT CHORIOAMNIONITIS
Yoldi Harka Nandra, Dovy Djanas, Hafni Bachtiar
Department of Obtetrics and Gynecology Faculty of Medicine Andalas University Dr. M. Djamil Central General Hospital Padang
Background: Knowing the difference in CRP levels in patients with preterm premature rupture of chorioamnionitis with preterm premature rupture of patients without chorioamnionitis
Methods : This study is a cross-sectional comparative performed in M. Zein hospitals at Painan and Adnaan WD hospitals at Payakumbuh since March 2016 - August 2016. In the study sample get as many as 32 people were grouped into two groups: preterm PROM chorioamnionitis group and preterm PROM without chorioamnionitis group, each group had samples of 16 people who meet the inclusion and exclusion criteria. All patients were administered according to the standard procedure. In both groups examined serum hs CRP. Hs CRP examination carried out before giving antibiotics.
Results : CRP levels in preterm premature rupture of membranes with chorioamnionitis average of 44.73 mg/L with a standard deviation of 13.36 mg/L and CRP levels in preterm premature rupture of membranes without chorioamnionitis mean of 4.27 mg/L with a standard deviation of 1.28 mg/L
Conclusion: There are differences in hsCRP levels in patients with preterm premature rupture of chorioamnionitis with preterm premature rupture of without chorioamnionitis
Keywords: hs CRP, preterm PROM with chorioamnionitis, preterm PROM without chorioamnionitis
Abstrak
PERBEDAAN KADAR CRP PADA PASIEN KETUBAN PECAH DINI PRETERM KORIOAMNIONITIS DENGAN PASIEN KETUBAN PECAH DINI PRETERM TANPA KORIOAMNIONITIS
Yoldi Harka Nandra, Dovy Djanas, Hafni Bachtiar
Bagian Obstetri dan Ginekologi Fakultas Kedokteran Universitas Andalas RSUP Dr. M. Djamil Padang
Tujuan : Mengetahui perbedaan kadar CRP pada pasien ketuban pecah dini preterm korioamnionitis dengan pasien ketuban pecah dini preterm tanpa korioamnionitis
Metode : Penelitian ini merupakan cross sectional comparative yang dilakukan di RSUD M. Zein Painan dan RSUD Adnaan WD Payakumbuh sejak Maret 2016 – Agustus 2016. Di dapatkan sampel penelitian sebanyak 32 orang yang dikelompokkan kedalam dua kelompok yaitu kelompok dengan KPD preterm korioamnionitis dan kelompok KPD preterm tanpa korioamnionitis, masing-masing kelompok memiliki sampel sebanyak 16 orang yang memenuhi kriteria inklusi dan eksklusi. Semua pasien ditatalaksana sesuai standar prosedur. Pada kedua kelompok dilakukan pemeriksaan hs CRP serum. Pemeriksaan hs CRP dilakukan sebelum pemberian antibiotik.
Hasil : Kadar CRP pada Ketuban Pecah Dini preterm dengan korioamnionitis rerata 44,73 mg/L dengan standar deviasi 13,36 mg/L. dan Kadar CRP pada Ketuban Pecah Dini preterm tanpa korioamnionitis rerata 4,27 mg/L dengan standar deviasi 1,28 mg/L
Kesimpulan : Terdapat perbedaan kadar hsCRP pada pasien ketuban pecah dini preterm korioamnionitis dengan pasien ketuban pecah dini preterm tanpa korioamnionitis
.
Kata kunci : hs CRP, KPD preterm korioamnonitis, KPD preterm tanpa korioamnioniti
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
