Results 41 to 50 of about 5,390,161 (308)

for Ampere‐Level Current Density Hydrogen Evolution

, 2023
To meet the requirements for industrial water splitting to generate hydrogen, it is urgent, but still quite challenging to develop highly active and stable electrocatalysts for large-current-density hydrogen evolution reaction (HER).
Zhang, Huaiyu, Zhu, Dongdong, Qiao, Man, Dongdong Zhu, Tang, Yujia, Bai, Yu, Xue Lu, Yan Zou, Yujia Tang, Liang Wang, Juhong Miao, Zou, Yan, Huaiyu Zhang, Miao, Juhong, Lu, Xue, Yu Bai, Man Qiao, Wang, Liang   +17 more
core   +1 more source

Optimized Irregular Low-Density Parity-Check Codes for Multicarrier Modulations over Frequency-Selective Channels

EURASIP Journal on Advances in Signal Processing, 2004
This paper deals with optimized channel coding for OFDM transmissions (COFDM) over frequency-selective channels using irregular low-density parity-check (LDPC) codes.
Gelle Guillaume, Mannoni Valérian, Declercq David   +2 more
doaj   +1 more source

An Efficient Method to Construct Parity-Check Matrices for Recursively Encoding Spatially Coupled LDPC Codes †

Entropy, 2016
Spatially coupled low-density parity-check (LDPC) codes have attracted considerable attention due to their promising performance. Recursive encoding of the codes with low delay and low complexity has been proposed in the literature but with constraints ...
Zhongwei Si, Sijie Wang, Junyang Ma
doaj   +1 more source

The Impact of the Average Temperature, Humidity, Wind Speed, Altitude, and Population Density on Daily COVID-19 Infection Evolution

Medical Sciences Forum, 2021
The aim of this study is to investigate the impact of climate conditions, altitude, and population density on daily COVID-19 infection evolution.
Rachid Lagtayi, Lamya Lairgi, Abdelmajid Daya, Ahmed Khouya   +3 more
doaj   +1 more source

LDPC Coded Massive MIMO Systems

Entropy, 2019
We design a coded massive multiple-input multiple-output (MIMO) system using low-density parity-check (LDPC) codes and iterative joint detection and decoding (JDD) algorithm employing a low complexity detection.
Inho Hwang, Han Jin Park, Jeong Woo Lee   +2 more
doaj   +1 more source

Recent origin of low trabecular bone density in modern humans [PDF]

, 2014
Humans are unique, compared with our closest living relatives (chimpanzees) and early fossil hominins, in having an enlarged body size and lower limb joint surfaces in combination with a relatively gracile skeleton (i.e., lower bone mass for our body ...
Chirchira, Habiba, Ruff, Christopher B., Zipfel, Bernhard, Hublin, Jean-Jacques, Zipfel, B., Hublin, J. ; https://orcid.org/, Kivell, Tracy L., Carlson, K., Carlson, Kristian J., Richmond, B., Chirchir, H., Richmond, Brian G., Ruff, C., Kivell, T. ; https://orcid.org/   +13 more
core   +1 more source

Monitoring storm evolution using a high-density seismic network

Scientific Reports, 2023
Data acquired by a dense seismic network deployed in the Cerdanya basin (Eastern Pyrenees) is used to track the temporal and spatial evolution of meteorological events such as rainfall episodes or thunderstorms. Comparing seismic and meteorological data,
J. Diaz, M. Ruiz, M. Udina, F. Polls, D. Martí, J. Bech   +5 more
doaj   +1 more source

Impact of Radiation Therapy on Physical and Psychosocial Health of Adolescents and Young Adults: A Joint Report From the Children's Oncology Group AYA and Radiation Oncology Committees

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Rates of cancer among adolescents and young adults (AYA), age 15–39 years, are increasing. Consequently, radiation oncologists are treating more AYAs who have diagnoses spanning both pediatric and adult practices. Compared to pediatric and older adult patients, AYAs face a unique set of challenges.
Hesham Elhalawani, Rachel K. Peterson, Avani D. Rao, Laurie J. McKenzie, Ahmed Magdy Elmotayam, Leslie Chang, Michael Roth, Susan L. McGovern   +7 more
wiley   +1 more source

Clinical factors associated with trabecular bone score.

, 2013
Dual-energy X-ray absorptiometry (DXA) measurement of bone mineral density (BMD) is the reference standard for diagnosing osteoporosis but does not directly reflect deterioration in bone microarchitecture.
Hans, D., Leslie, W.D., Manitoba Bone Density, Program, Krieg, M.A.   +3 more
core   +1 more source

Referral Patterns and Diagnostic Timeliness in Pediatric Cancer: A Hospital‐Based Study in Indonesia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Timely diagnosis and treatment are critical for improving survival among children with cancer. In low‐ and middle‐income countries (LMICs), delays are common and may be influenced by fragmented referral pathways and diagnostic limitations.
Nur Melani Sari, Regina Hadi Putri, Fatimah Assyifa, Judith Spijkerman, Gertjan Johannes Kaspers, Susi Susanah   +5 more
wiley   +1 more source