Results 151 to 160 of about 2,382,016 (345)

Probing the Complex and Variable X-ray Absorption of Markarian 6 with XMM-Newton

, 2003
We report on an X-ray observation of the Seyfert 1.5 galaxy Mrk 6 obtained with the EPIC instruments onboard XMM-Newton. Archival BeppoSAX PDS data from 18-120 keV were also used to constrain the underlying hard power-law continuum.
Cristian Vignali, D. Michael Crenshaw, Franz E. Bauer, George I. M., John J. Feldmeier, Kukula M. J., Malaguti G., Matt G., Matt G., Meaburn J., Stefan Immler, Steven B. Kraemer, W. N. Brandt   +12 more
core   +1 more source

Bioengineering facets of the tumor microenvironment in 3D tumor models: insights into cellular, biophysical and biochemical interactions

FEBS Open Bio, EarlyView.
The tumor microenvironment is a dynamic, multifaceted complex system of interdependent cellular, biochemical, and biophysical components. Three‐dimensional in vitro models of the tumor microenvironment enable a better understanding of these interactions and their impact on cancer progression and therapeutic resistance.
Salma T. Rafik, Deniz Bakkalci, Alexander J. MacRobert, Umber Cheema   +3 more
wiley   +1 more source

Learner success in eLearning : room for improvement-- but how? : an analysis of the problem of retention and completion in an online programme : a thesis presented in partial fulfilment of the requirements for the degree of Master of Education in Adult Education at Massey University [PDF]

, 2006
Lack of time to work on their online programme was a more significant barrier for students on an online programme than problems such as cost, access to a computer, computer difficulties, childcare or other family responsibilities, or lack of employer ...
Roberts, Christine
core  

Ionization Corrections For Low-Metallicity H II Regions and the Primordial Helium Abundance

, 1999
Helium and hydrogen recombination lines observed in low-metallicity, extragalactic H II regions provide the data used to infer the primordial helium mass fraction, Y_P.
Cid-Fernandes R., Gary Steigman, Levshakov S. A., Lopez R., Pagel B. E. J., Peimbert M., Peimbert M., Peimbert M., Peimbert M., Ruth Gruenwald, Stasinska G., Stasinska G., Sueli M. Viegas, Vilchez J. M.   +13 more
core   +3 more sources

New Performance Index “Attractiveness Factor” for Evaluating Websites via Obtaining Transition of Users’ Interests

Data Science and Engineering, 2019
The studies of browsing behavior have gained increasing attention in web analysis for providing better service. Most of the conventional approaches focus on simple indices such as average dwell time and conversion rate.
Akihiro Yoshida, Tatsuru Higurashi, Masaki Maruishi, Nariaki Tateiwa, Nozomi Hata, Akira Tanaka, Takashi Wakamatsu, Kenichi Nagamatsu, Akira Tajima, Katsuki Fujisawa   +9 more
doaj   +1 more source

N-fold module factorizations [PDF]

arXiv
Module factorizations with two factors of a regular normal element in a ring are newly introduced by Xiao-Wu Chen. In the paper, we introduce n-fold module factorizations, that is, module factorizations with n factors. First we realize the category of n-fold module factorizations as the module category of a matrix subring.
arxiv  

Comparative single‐cell transcriptomic profiling of patient‐derived renal carcinoma cells in cellular and animal models of kidney cancer

FEBS Open Bio, EarlyView.
We generated and characterized clear cell renal cell carcinoma models using the patient‐derived RCC243 cell line—including cell culture, orthotopic, and metastatic tumors—via single‐cell RNA‐sequencing for comparisons between models and patient tumor datasets.
Richard Huang, Lynn Kee, Alexander Gont, Jalna Meens, Fraser G. Ferens, Meredith S. Irwin, Laurie Ailles, Scott A. Yuzwa, Claire M. Robinson, Michael Ohh   +9 more
wiley   +1 more source

Comparative study of adenosine 3′‐pyrophosphokinase domains of MuF polymorphic toxins

FEBS Open Bio, EarlyView.
With the ultimate goal of understanding the association of toxin‐immunity modules to temperate phages, we characterized toxins from three prophages and examined cross‐protection from immunity proteins. The toxins exhibit adenosine 3′‐pyrophosphokinase activity and are toxic in Escherichia coli.
Eloïse M. Paulet, Julia Bartoli, Atakan Kabtan, Chloé M. Piras, Audrey C. Tempier, Eric Cascales, Julie P. Viala   +6 more
wiley   +1 more source

How to improve the regression factor score predictor when individuals have different factor loadings [PDF]

arXiv
Previous research has shown that ignoring individual differences of factor loadings in conventional factor models may reduce the determinacy of factor score predictors. Therefore, the aim of the present study is to propose a heterogeneous regression factor score with larger determinacy than the conventional regression factor score when individuals have
arxiv  

Primitive factorizations, Jucys-Murphy elements, and matrix models [PDF]

arXiv, 2010
A factorization of a permutation into transpositions is called "primitive" if its factors are weakly ordered. We discuss the problem of enumerating primitive factorizations of permutations, and its place in the hierarchy of previously studied factorization problems.
arxiv