Results 81 to 90 of about 8,316 (179)
Child Care in the Postwelfare Reform Era: Analysis and Strategies for Advocates
, 1999 Adequate child care is essential to enable poor women to support their families with work outside the home. In 1994 the U.S. General Accounting Office found that offering a child care subsidy to poor mothers increased the likelihood by 15 percent that ...
Bussiere, Alice +5 more
core
Space Weather, Volume 23, Issue 12, December 2025.Abstract This work presents the first climatology of apex altitudes for intermediate‐scale plasma density irregularities based on long‐term observations spanning more than 13 years (01/2012–05/2025). Amplitude scintillation data from ground‐based receivers, covering apex altitudes between 605 and 2,360 km over the same magnetic meridian, were used ...
J. Sousasantos +3 more
wiley +1 more source
Analytical bound for the CCDF of Crest Factor in NC-OFDM Systems
Journal of Communications Software and Systems, 2015 Non-contiguous orthogonal frequency division multiplexing (NC-OFDM) is a promising framework for wireless communication systems due to OFDM characteristics like the spectral bandwidth efficiency, robustness to frequency selective fading channels, etc ...
Mohammed Y. Bendimerad +2 more
doaj
Algorithms for Molecular Biology, 2006 The technique of Finite Markov Chain Imbedding (FMCI) is a classical approach to complex combinatorial problems related to sequences. In order to get efficient algorithms, it is known that such approaches need to be first rewritten using recursive ...
Nuel Grégory
doaj +1 more source
A Stochastic Geometry Framework for LOS/NLOS Propagation in Dense Small Cell Networks
, 2015 The need to carry out analytical studies of wireless systems often motivates the usage of simplified models which, despite their tractability, can easily lead to an overestimation of the achievable performance.
Doyle, Linda +3 more
core +1 more source
Offloading traffic hotspots using moving small cells
, 2016 In this paper, the concept of moving small cells in mobile networks is presented and evaluated taking into account the dynamics of the system. We consider a small cell moving according to a Manhattan mobility model which is the case when the small cell ...
Chahed, Tijani +2 more
core +1 more source
EURASIP Journal on Wireless Communications and NetworkingThis paper explores the efficiency of peak-to-average power ratio (PAPR) reduction methods in non-orthogonal multiple access (NOMA) systems under Rayleigh and Rician fading channels for various sub-carrier configurations. The μGA-PTS method improves PAPR
Arun Kumar +3 more
doaj +1 more source
PAPR REDUCTION IN ACO-OFDM FOR VISIBLE LIGHT COMMUNICATION SYSTEM [PDF]
Journal of Engineering Science and Technology, 2018 Visible Light Communication (VLC) is gaining popularity in optical wireless. In conventional OFDM, bi-polar signals having both positive and negative values are considered.
MOHIT SRIVASTAVA +3 more
doaj
International Journal of Antennas and Propagation, 2014 The use of per-subcarrier antenna subset selection in OFDM wireless systems offers higher system capacity and/or improved link reliability. However, the implementation of the conventional per-subcarrier selection scheme may result in significant ...
Ngoc Phuc Le +2 more
doaj +1 more source
Journal of Engineering and Sustainable Development, 2013 High Peak to Average Power Ratio (PAPR) of transmitted signal is one of the major drawbacks of the complex wavelet packet modulation (CWPM). Utilizing the advantage of concentrating the energy to certain subspaces of the discrete wavelet transform ...
Hikmat N. Abdullah +2 more
doaj