Results 81 to 90 of about 975,907 (284)

Testing equality of several correlation matrices

Revista Colombiana de Estadística, 2013
Summary: In this article we show that the Kullback's statistic for testing equality of several correlation matrices may be considered a modified likelihood ratio statistic when sampling from multivariate normal populations. We derive the asymptotic null distribution of \(L^\ast\) in series involving independent chisquare variables by expanding \(L^\ast\
GUPTA, ARJUN K., JOHNSON, BRUCE E., NAGAR, DAYA K.   +2 more
openaire   +4 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Communication-efficient and quantum-resistant PKE with multi-ciphertexts equality test

Cybersecurity
Amid the rapid evolution of cloud computing, safeguarding data privacy has become a core priority for both academic and industrial communities. To protect user data from unauthorized access, vast volumes of sensitive information are encrypted before ...
Tongchen Shen, Wanqing Wang, Xiangxue Li, Xiaogang Zhou   +3 more
doaj   +1 more source

Fixed, Random, or Something in Between? – A Variant of HAUSMAN’s Specifi cation Test for Panel Data Estimators [PDF]

This paper proposes a variant of the classical HAUSMAN specifi cation test commonly employed to decide whether the estimation of a random-eff ects model is a viable alternative to estimating fi xed eff ects. Whereas the classical test probes the equality
Colin Vance, Manuel Frondel
core  

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

A SIMPLE BUT EFFICIENT SCHEME FOR COLOUR IMAGE RETRIEVAL BASED ON STATISTICAL TESTS OF HYPOTHESIS [PDF]

ICTACT Journal on Image and Video Processing, 2011
This paper proposes a simple but efficient scheme for colour image retrieval, based on statistical tests of hypothesis, namely test for equality of variance, test for equality of mean. The test for equality of variance is performed to test the similarity
K. Seetharaman, T. Hemalatha
doaj  

Association of lichen planus with dyslipidemia: A comparative, cross-sectional study

Clinical Dermatology Review, 2019
Context: Lichen planus (LP) is an idiopathic T-cell-mediated inflammatory disorder. Chronic inflammation may result in derangement of lipid metabolism. Some studies have shown that prevalence of dyslipidemia is more among patients with LP, whereas other ...
Neema Azeez, Neelakandhan Asokan
doaj   +1 more source

Diversity and complexity in neural organoids

FEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

History Learning Based on Value of Syech Abdurauf As-Singkili Manuscript to Improve Gender Equality Awareness

Yupa: Historical Studies Journal, 2018
Local culture-based education has an important role in character building for students. In a scientific heritage, there are values of wisdom that can be applied in everyday life.
Mawardy As Ary Putra
doaj   +1 more source