In a wavelength-routed optical network, a transmitted signal remains in the optical domain over the entire route (lightpath) assigned to it between its source and destination nodes. The optical signal may have to traverse a number of crossconnect switches (XCS’s), fiber segments, and optical amplifiers, e.g., erbium-doped fiber amplifiers (EDFA’s). Thus, while propagating through the network, t...

Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM) based Elastic Optical Network (EON) is one of the emerging technologies being considered for next generation high data rate optical network systems. Routing and Spectrum Allocation (RSA) is an important aspect of EON. Apart from spectral fragmentation created due to spectrum continuity and contiguity constraints of RSA, trans...

In this thesis, we present a measurement study on the quantification of lost transmission opportunities in IEEE 802.11 networks, which is an increasingly more important problem due to a higher number of IEEE 802.11-based deployments. Lost transmission opportunities can arise from both unwanted traffic and link impairments. We perform passive measurements to gain information about unwanted traff...

Carrier frequency offset (CFO) and phase noise (PN) are major oscillator impairments in direct-conversion transceivers, and single-carrier frequency-division-multiple access (SC-FDMA) is the uplink transmission scheme in the longterm evolution (LTE) standard. We derive a new analytical expression for the normalized mean square error (NMSE) in asynchronous SC-FDMA systems under CFO and joint tra...

OBJECTIVE We compared the levels of academic, physical, and social functioning of children and adolescents with chronic physical diseases with those of healthy peers or test norms. METHODS A random effects meta-analysis was computed to integrate the results of 954 studies. RESULTS Impairments of physical functioning (g = 0.82 standard deviation units) were stronger than impairments of acade...

Identifying modifiable behaviors associated with prevention of activities of daily living (ADL) impairments is vital to implement preventive strategies for independent living in elderly. We aimed to examine the associations between objectively measured breaks in sedentary time with ADL impairments and physical independence. Cross-sectional assessments were carried out in 371 participants (131 m...

This cross-sectional study assessed the grade of physical impairments in 61 individuals with leprosy receiving multidrug therapy (MDT) under the Brazilian Unified Health System (SUS), and residing in Campina Grande, Paraíba State, Brazil. Impairments were assessed using the disability grade (DG) standardized by the WHO, and the EHF score (Eye-Hand-Foot sum of impairment scores). Impairments wer...