162,342 research outputs found
Letter Written by A. M. Ramalho to the Bryant College Service Club Dated August 15, 1942
No full text[Transcription begins] Btry. D, 603rd CA (AA) Burbank, California August 15, 1942
Bryant Service Club Bryant College Providence, R. I.
To Whom It May Concern:
Thanks loads for cigarettes and also “On the Campus.”
I’m sure that all former students of Bryant College who are now in the armed service of our country fully appreciate the fine work that the Bryant Service Club has been doing.
Thanks again for everything and please forward regards to Profs Gulski and Shors.
Sincerely Sgt. A. M. Ramalho Btry. D, 603rd C. A. (AA) Burbank, California [Transcription ends
Aspectos da satisfaçao geral do trabalho: existirà uma mudança de padrao ao longo do tempo?
No full textAppropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Alternative versions of the RESET test for binary response index models: a comparative study
No full textBinary response index models may be affected by several forms of misspecification, which range from pure functional form problems (e.g. incorrect specification of the link function, neglected heterogeneity, heteroskedasticity) to various types of sampling issues (e.g. covariate measurement error, response misclassification, endogenous stratification, missing data). In this paper we examine the ability of several versions of the RESET test to detect such misspecifications in an extensive Monte Carlo simulation study. We find that: (i) the best variants of the RESET test are clearly those based on one or two fitted powers of the response index; and (ii) the loss of power resulting from using the RESET instead of a test directed against a specific type of misspecification is very small in many cases.Binary models; RESET; Misspecification.
Culex (Phytotelmatomyia) renatoi Lane & Ramalho
No full text<i>Culex</i> (<i>Phytotelmatomyia</i>) <i>renatoi</i> Lane & Ramalho <p> OUR SpEcImENS HaVE all cHaRacTERISTIcS dEScRIbEd IN LaNE & RamalHO (1960) aNd ROSSI & HaRbacH (2008). THE adUlT fEmalE IS SHOWN IN (FIg. 4E,F). THE fEmalE Of <i>Cx. renatoi</i> maY bE dISTINgUISHEd Of THE fEmalE Of <i>Cx. castroi</i> bY HaVINg THE pRObOScIS WITH a mESIal RINg Of WHITE ScalES; WHITE ScalES OVER THE jOINTS Of THE HINdTaRSOmERES; aNd THE mEdIaN lObE Of ScUTEllUm WITH SIlVERY-WHITE ScalES.</p> <p> <b>Bionomics and distribution.</b> A SINglE laRVa WaS cOllEcTEd fROm THE aXIl Of aN <i>Eryngium</i> SpEcIES WITH laRVaE Of <i>Cx.</i> (<i>Phy.</i>) <i>castroi</i>. THE IdENTIfIcaTION WaS baSEd ON THE fEmalE REaREd fROm THE laRVa. CURRENT dISTRIbUTION IN CaRIbbEaN aNd SOUTH AmERIca: ANTIgUa aNd BaRbUda, ARgENTINa, BRazIl (WalTER REEd BIOSYSTEmaTIcS UNIT, 2013). <i>Culex renatoi</i> WaS REcORdEd pREVIOUSlY fROm BUENOS AIRES aNd ENTRE RíOS. IT IS REcORdEd HERE fROm CHacO PROVINcE.</p> <p> <b>Collection data.</b> CHacO PROVINcE: CHacO NaTIONal PaRK, 27-IX-2009, 1F, LE, PE. CampOS aNd CazORla cOll.; CampOS dET. SpEcImENS ILPLA. CUL 20-013.</p>Published as part of <i>Stein, Marina, Alvarez, Carla N., Alonso, Ana C., Bangher, Débora N., Willener, Juana A. & Campos, Raúl E., 2018, New records of mosquitoes (Diptera: Culicidae) found in phytotelmata in Northern Argentina, pp. 87-100 in Zootaxa 4399 (1)</i> on page 93, DOI: 10.11646/zootaxa.4399.1.5, <a href="http://zenodo.org/record/1206470">http://zenodo.org/record/1206470</a>
Is neglected heterogeneity really an issue in binary and fractional regression models? A simulation exercise for logit, probit and loglog models
No full textIn this paper we examine theoretically and by simulation whether or not unobserved heterogeneity independent of the included regressors is really an issue in logit, probit and loglog models with both binary and fractional data. We found that unobserved heterogeneity: (i) produces an attenuation bias in the estimation of regression coefficients; (ii) is innocuous for logit estimation of average sample partial effects, while in the probit and loglog cases there may be important biases in the estimation of those quantities; (iii) has much more destructive effects over the estimation of population partial effects; (iv) only for logit models does not affect substantially the prediction of outcomes; and (v) is innocuous for the size and consistency of Wald tests for the significance of observed regressors but, in small samples, reduces their power substantially.Binary models; fractional models; neglected heterogeneity; partial effects; prediction; wald tests.
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
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
"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.
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