Results 81 to 90 of about 58,647 (231)

Structural Characteristics and Stellar Composition of Low Surface Brightness Disk Galaxies

, 1993
We present UBVI surface photometry of a sample of low surface brightness (LSB) disk galaxies. LSB disk galaxies are fairly well described as exponential disks with no preferred value for either scale length, central surface brightness, or rotational ...
Bothun, Greg, McGaugh, Stacy
core   +1 more source

Bose-Einstein Condensate Dark Matter Halos confronted with galactic rotation curves [PDF]

, 2017
We present a comparative confrontation of both the Bose-Einstein Condensate (BEC) and the Navarro-Frenk-White (NFW) dark halo models with galactic rotation curves.
Dwornik, M., Gergely, L. Á., Keresztes, Z., Kun, E.   +3 more
core   +3 more sources

MicroCT reinvestigation of the only articulated fossil anostomid fish reveals synonymy of Arhinolemur Ameghino, 1898 and Megaleporinus Ramirez et al., 2017

The Anatomical Record, EarlyView.
Abstract Arhinolemur scalabrinii† Ameghino, 1898 was originally described as a strepsirrhine primate (Mammalia) but has been recognized as an anostomid fish since 2012. It remains the only extinct anostomid species known from complete cranial material.
Karen M. Panzeri, Humberto L. Andrelino, Sergio Bogan, José P. O'Gorman, Federico Agnolín, Brian L. Sidlauskas, Nahuel Vega, Agustín G. Martinelli, José L. Birindelli   +8 more
wiley   +1 more source

Arthroscopic‐Assisted Suture Tape–Reinforced Triangular Fibrocartilage Complex Repair and Distal Radioulnar Ligament Augmentation Using a Modified Adams‐Berger Technique

Arthroscopy Techniques, EarlyView.
Abstract Distal radioulnar joint instability secondary to triangular fibrocartilage complex (TFCC) injury remains a major challenge in wrist surgery. Traditional tendon graft–based reconstruction techniques, such as the Adams‐Berger procedure, though effective, require extensive soft tissue dissection and tendon harvesting, resulting in significant ...
Jin‐Ming Zhang, Hao‐Yang Tan, Xing‐Hao Deng, Shu‐Bo Li, Jian‐Zhong Xie, Yaxiang Liu, Zhong Chen   +6 more
wiley   +1 more source

Digital Image Watermarking Techniques: A Review

Information, 2020
Digital image authentication is an extremely significant concern for the digital revolution, as it is easy to tamper with any image. In the last few decades, it has been an urgent concern for researchers to ensure the authenticity of digital images ...
Mahbuba Begum, Mohammad Shorif Uddin
doaj   +1 more source

Surface Photometry and Radial Color Gradients of Nearby Luminous Early-type Galaxies in SDSS Stripe 82

, 2010
We make use of the images from the Sloan Digital Sky Survey Stripe 82 to present an analysis of r band surface brightness profiles and radial color gradients (g - r, u - r) in 111 nearby early-type galaxies (ETGs).
Bender, Bender, Blanton, Caon, Ciotti, Elmegreen, Fang-Zhou Jiang, Ferreras, Hinkley, La Barbera, Larson, Larson, Larson, Marcum, Menanteau, Peletier, Qiu-Sheng Gu, Song Huang, Sparke, Spolaor, Suh, Sérsic, Sérsic, Wu, Yang   +24 more
core   +1 more source

Predictors of authorised, unauthorised and persistent absence among secondary school pupils in Scotland

British Educational Research Journal, EarlyView.
Abstract This article examines the factors associated with persistent absenteeism (an absence rate of 10% or higher) and authorised and unauthorised absence among secondary school pupils in Scotland. Using linked administrative data, the analysis focuses on secondary school stages S1–S6 in three academic years.
Silvia Behrens, Morag Treanor, Patricio Troncoso, Bethany Lee‐Shield, Emma Russell, Lee Williamson, Cecilia Macintyre   +6 more
wiley   +1 more source

An X-ray Bright Nucleus in the Low Surface Brightness Galaxy UGC 6614

, 2010
We report a study of the X-ray emission from the nuclear region of the low surface brightness (LSB) galaxy UGC 6614. Very little is known about the central objects in LSB galaxies especially their X-ray properties and X-ray spectra. In this study we have
B. Paul, Barth, C. Jain, Das, Das, Das, Das, Dong, Edelson, Gabor, Georgakakis, Greene, Hinz, Ho, Ho, Impey, Impey, Kormendy, M. Das, Markowitz, McHardy, Miniutti, Nandra, Nikolajuk, Nikolajuk, Papadakis, Peterson, Pierce, Pizzella, Rahman, Sachindra Naik, Schombert, Sprayberry, Turner, Uttley, Vasudevan, Vaughan, Vaughan, Ziolkowski   +38 more
core   +1 more source

Engineering Spin State of Ni Single‐Atoms to Enhance Electrocatalytic Activity of Sulfur Conversion in Lithium–Sulfur Batteries

Carbon Energy, EarlyView.
Ni SACs with high‐spin state show strong catalytic activity toward lithium polysulfides (LPSs), whereas the Ni SACs with low‐spin state have strong adsorption capacity for LPSs. Therefore, the preparation of Ni SACs with an intermediate spin state by controlling pyridinic N and pyrrolic N enables an excellent balance between the adsorption and ...
Mengyang Li, Guiqiang Cao, Yiming Qi, Chenyang Hou, Xuexia Song, Ruixian Duan, Huijuan Yang, Yifan Li, Xiaorui Chen, Zongnan Lv, Qinchuan Chen, Yitong Yuan, Guohua Liu, Yuhui Xu, Jingjing Wang, Wenbin Li, Xifei Li   +16 more
wiley   +1 more source

The genome of Chenopodium pallidicaule: An emerging Andean super grain

Applications in Plant Sciences, 2019
Premise Cañahua is a semi‐domesticated crop grown in high‐altitude regions of the Andes. It is an A‐genome diploid (2n = 2x = 18) relative of the allotetraploid (AABB) Chenopodium quinoa and shares many of its nutritional benefits.
Hayley Mangelson, David E. Jarvis, Patricia Mollinedo, Oscar M. Rollano‐Penaloza, Valeria D. Palma‐Encinas, Luz Rayda Gomez‐Pando, Eric N. Jellen, Peter J. Maughan   +7 more
doaj   +1 more source