Results 131 to 140 of about 200,425 (305)

Debris Disk around Star HR 8799

, 2016
This infrared image, captured by the Spitzer Space Telescope shows a giant circle of very fine dust around the young star HR 8799, located to 129 light-years away in the constellation PegasusHave a prior knowledge about planetary systemEducação Superior::
Spitzer Space Telescope, National Aeronautics and Space Administration (NASA), Jet Propulsion Laboratory, California Institute of Technology   +3 more
core   +1 more source

Geometric Characterization of LEO–GEO Inter‐Satellite Links for Bidirectional Communications

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Incorporating geosynchronous Earth orbit (GEO) and low Earth orbit (LEO) satellites can extend communication services far beyond the reach of terrestrial infrastructure. A key enabler of such architectures is the establishment of inter‐satellite links (ISLs) between LEOs and GEOs to support bidirectional communications.
Muhammad Furqan, Lingfeng Ye, Yanming Feng   +2 more
wiley   +1 more source

Beyond Dexterity: Navigating the Trade‐Offs of Steerable Catheter‐ and Guidewire‐Based Endovascular Robotics for Clinical Applications

SmartBot, EarlyView.
Steerable catheters and guidewires enable precise navigation and intervention in complex vascular anatomies. This review systematically examines their steering mechanisms, including morphological, transmission‐based, and transduction‐based actuation, highlighting their underlying principles and engineering characteristics.
Xunzhi Xie, Yumo Wang, Yihao Zheng, Yang Liu   +3 more
wiley   +1 more source

Cost of Equipping First‐Level Hospitals for Children's Surgical Care in Low‐ and Middle‐Income Countries

World Journal of Surgery, EarlyView.
The Global Initiative for Children's Surgery (GICS) developed the Optimal Resources for Children's Surgical Care (ORECS) recommendations to address disparities in access to high‐quality children's surgery in low‐ and middle‐income countries (LMICs). However, the cost of adequately equipping these hospitals is currently unknown, creating a barrier for ...
Martilord Ifeanyichi, Betel Amdeslassie Fenta, Meskerem Aleka Kebede, Maeve Sofia Bognini, Rachel Hargest, Mohamed Sameh Shalaby, Sarah Cairo, Emmanuel Ameh, Kokila Lakhoo, Rocco Friebel, on behalf of GICS Membership, Hafeez Abdelhafeez, Dayang A. Abdul Aziz, Lukman Olajide Abdur‐Rahman, Simone Abib, Mohammed J. Aboud, Amal Abu. Bakr Abdullah Adam, Maimuna Abubakar, Piero Alberti, Abdelbasit Elsayed Ali, Mohd Yusof Abdullah, Hilda Abellar, Utsav Acharya, Peace Ifeoma Amaraegbulam, Samuel Negash Amde, Gbenou Antoine Seraphin, Marjorie Arca, Jason Axt, Tahmina Banu, Michael Bezuhly, Arpita Biswangree, Marilyn W. Butler, Michael Buzuhly, Sarah B. Cairo, Juan Francisco Campos Rodezno, Maija Cheung, Lohfa Chirdan, Milind Chitnis, Zachary Clapp, Hannah Cockrell, Aline Coltro, Gaurav Deshpande, Mei Diao, Amivi Alice Donou, Beda Espineda, Faye M. Evans, Biniam Ewnte, Jacques Fadhili Bake, Kara Faktor, Diana Lee Farmer, Ilijana Gaffar, Michael Ganey, Zipporah Gathuya, J. F. Gonzalez‐Zamora, Christa N. Grant, Rebecca Crane Gray, Ahmed Hasnaien, Mathula Hettiarachchi, Phillip Hsu, Wala Mohammed Ibrahim Rahma, Romeo C. Ignacio, Sophie Inglin, Saleem Islam, Reuel Kageni Maina, Nathan Ezie Kengo, Phyllis Kisa, Kokila Lakhoo, Monica Langer, Basil Leodoro, Judith Lindert, Pablo Andrés Lobos, Katrine Løfberg, Vrisha Madhuri, Erick Martin Yturralde, Dennis Mazingi, Elizabeth Jane Mcleod, John G. Meara, Felicity Vidya Mehendale, Felicity Vidya Mehendale, Leecarlo Milano, N. A. Mohd Hanifah, Amabelle Moreno, Yves Mpongo, Salehe Mrutu, Abirami Muthumani, Shireen Anne Nah, Bindi Naik‐Mathuria, Biplab Nandi, Ramesh M. Nataraja, Charles Newton Odongo, Stella Alice Nimanya, Cathrine Nixon, Angélique Ntegerejuwampaye, Nkeiruka Obi, Aderonke Omoyeni Obisesan, Agneta Odera, Lucienne Irene Patricia Ondima, Maryrose O. Osazuma, Emmanuel Owusu Ofori, Doruk Ozgediz, Hector Alberto Pacheco Cesar, Nirav Patel, Shazia Peer, Janey Phelps, Mercedes Pilkington, Dan Poenaru, Vinitha Ravindran, Udo Rolle, Lily Saldaña Gallo, Abdullah Saleh, Lubna Samad, Sabrina Sedano, Bijaya Kumar Sethi, Justina Seyi‐Olajide, Mohamed Sameh Shalaby, Mehek Sharma, Sabina Siddiqui, Caroline Stephens, Judith Stoltz, Nabila Talat, Warwick J. Teague, Gonca Tekant, Nadyn Tumba Kapaso, Barbara Wildhaber, Ava C. Yap, Nelci Zanon, Madhushree Zope   +126 more
wiley   +1 more source

Reflecting telescope configurations for CubeSat technology [PDF]

openIn questa tesi sono mostrate diverse configurazioni di un telescopio spaziale riflettente che viene realizzato utilizzado lo standard CubeSat, questo telescopio verrà utilizzato per l’osservazione di comete in prossimità del sole.
FRANZATO, SILVIA
core  

Fear of Feral Predators Alters Nutritional Responses in Desert Lizards 对野生捕食者的恐惧改变了沙漠蜥蜴的营养响应

Wildlife Letters, EarlyView.
Conservation actions meant to support vultures in the Thar desert of India attract large numbers of feral dogs, endangering native prey including the vulnerable Saara hardwickii. Lizards in high‐risk areas eat less food and do not change diet composition but retain more carbon and nitrogen from their diet.
Mihir Joshi, Dror Hawlena, Maria Thaker
wiley   +1 more source

Temporal Structuration: Negotiating Reproductive Timing in Urban China

The British Journal of Sociology, EarlyView.
ABSTRACT This article develops the concept of temporal structuration to explain how actors engage temporal norms as social structures. Based on 64 life story interviews in Shenzhen and analysed through constructivist grounded theory, it examines reproductive timing in urban China, where marriage and childbearing are organised by a dense timetable ...
Xijia You
wiley   +1 more source

New techniques in astronomical spectroscopy for 8-m telescopes [PDF]

, 1998
The purpose of this thesis is to investigate new instrument technology to enhance the capabilities of 8-m telescopes. This thesis first describes the theory, design, construction, and testing of an immersed grating.
Lee, David, Lee, D.
core  

Changes in the transition from cannabis use to use disorder by decade of first use: Findings from the Australian National Mental Health and Wellbeing surveys

Addiction, EarlyView.
Abstract Background and aims As cannabis becomes increasingly accessible and products more potent, it is critical that we understand how this may impact the risk of transitioning from cannabis use to cannabis use disorder (CUD). We aimed to examine whether the risk and speed of transition from cannabis use to CUD differ by decade of first cannabis use.
Jack Wilson, Siobhan O'Dean, Christina Marel, Olivia Dobson, Matthew Sunderland, Steph Kershaw, Tara Gückel, Emma Krogh Devine, Tim Slade, Maree Teesson, Emily Stockings   +10 more
wiley   +1 more source

Siding Spring Observatory, tape 3 (Monday)

, 1992
Contents: 1. Walking up 2.3 metre [telescope] outside stairs -- 2. 2.3 metre [telescope] dome opening from top -- 3. 2.3 metre telescope -- 4. From telescope to mountains -- 5. Telescope moving -- 6.
ANU Instructional Resources Unit (1975-1996)
core