Results 241 to 250 of about 615,565 (289)

Segmental composition and nerve distribution of the brachial plexus in Galictis cuja

The Anatomical Record, EarlyView.
Abstract Galictis cuja is a neotropical mustelid with terrestrial locomotor habits, yet the anatomy of its brachial plexus has remained undescribed. This study characterizes the origin, organization, and distribution of the brachial plexus nerves in 15 adult specimens (30 antimeres).
Natan da Cruz de Carvalho, Thais Mattos Estruc, Ingrid Bete Palmeira, Julia Fagundes Franco, Emillin Reis Bermudez, Paulo de Souza‐Junior, Marcelo Abidu‐Figueiredo   +6 more
wiley   +1 more source

Multivariate Analysis of Hematological Stress Biomarkers and Welfare Domains in Organic and Intensive Pig Farming in Italy: A Pilot Study

Animal Research and One Health, EarlyView.
Intensive or organic farming systems may expose pigs to management or environmental challenges. Our preliminary results concluded that organic farming might enhance adaptive immune function, showing that improvements in welfare can translate into measurable immunological benefits, based on the correlation between welfare assessment and physiological ...
Dorotea Ippolito, Talal Hassan, Antonio Marco Maisano, Stefania Bergagna, Cecilia Guasco, Barbara Miniscalco, Martina Tarantola, Elena Colombino, Claudio Caruso, Ahsan Muhammad, Silvia Mioletti, Laura Tomassone, Massimiliano Tursi, Cristina Vercelli, Giovanni Loris Alborali, Maria Teresa Capucchio   +15 more
wiley   +1 more source

Coherence‐Gated Wrapped‐Phase InSAR With Matrix‐Based Uncertainty Diagnostics for Burial‐Mound Hotspot Ranking (Sicily, Italy)

Archaeological Prospection, EarlyView.
ABSTRACT Burial mounds are key elements of Mediterranean funerary landscapes, but in intensively cultivated coastal plains their low‐relief expression is easily obscured by ploughing, levelling and rapidly changing surface conditions, making single‐date observations unreliable.
Salvatore Polverino, Hourakhsh Ahmadnia, Rokhsaneh Rahbarianyazd Ahmadnia   +2 more
wiley   +1 more source

Challenges and Opportunities in Multi‐Method Integrated Geophysical Prospection of Buried Building Remains at the Sanctuary of Olympia

Archaeological Prospection, EarlyView.
ABSTRACT Ancient Olympia was one of the most important sanctuaries and the venue for the Olympic Games in Greek and Roman times. Its remains are located in the Olympia Terrace (Peloponnese, Greece) at the present‐day confluence of the rivers Alpheios and Kladeos at the base of Mount Kronos.
Sarah Bäumler, Dennis Wilken, Peter Fischer, Lena Slabon, Timo Willershäuser, Birgitta Eder, Hans‐Joachim Gehrke, Erofili‐Iris Kolia, Franziska Lang, Oliver Pilz, Andreas Vött   +10 more
wiley   +1 more source

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The Covariance Matrix of the Information Matrix Test

Econometrica, 1984
In this note we point out how the covariance matrix of the information matrix test, due to \textit{H. White} [ibid. 50, 1-25 (1982; Zbl 0478.62088)], can be estimated without the computation of analytic third derivatives of the density function.
openaire   +2 more sources

Rank covariance matrix estimation of a partially known covariance matrix

Journal of Statistical Planning and Inference, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kuljus, Kristi, von Rosen, Dietrich
openaire   +1 more source

Shrinking the Covariance Matrix

The Journal of Portfolio Management, 2007
The subject here is construction of the covariance matrix for portfolio optimization. In terms of the ex post standard deviation of the global minimum-variance portfolio, there is no statistically significant gain in using more sophisticated shrinkage estimators rather than simpler portfolios of estimators.
David J. Disatnik, Simon Benninga
openaire   +1 more source

Estimation of the Covariance Matrix

2020
This chapter addresses decision-theoretic estimation of an error covariance matrix in a multivariate linear model relative to a Stein-type entropy loss. With a unified treatment for high and low dimensions, some important improving methods of the best scale and the best triangular invariant estimators are discussed by using the residual sum of squares ...
Hisayuki Tsukuma, Tatsuya Kubokawa
openaire   +1 more source

A GENERALIZED FUZZY COVARIANCE MATRIX

International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, 1995
This paper describes a generalized fuzzy covariance matrix based on the notion of fuzzy similitude and its application to discriminant analysis. It is shown that this generalized fuzzy covariance matrix may be useful in the determination of outliers. It is further noted that the generalized fuzzy covariance matrix may help to distinguish outliers from
openaire   +1 more source

Fisher information matrix of the coherently averaged covariance matrix

IEEE Transactions on Signal Processing, 1991
Novel expressions are derived for the asymptotic Fisher information matrix which is used to investigate the degree of statistical sufficiency of the approximately coherently averaged covariance matrix in the coherent signal-subspace method. These results correct previous ones given by the authors (see Proc. ICASSP-87, Dallas, TX, Apr. 1987).
Hsien-sen Hung, Mostafa Kaveh
openaire   +1 more source