Multi Carrier
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Low-Overhead Low-Complexity Carrier Phase Recovery Technique for Coherent Multi-Band OFDM-Based Superchannel Systems Enabled by Optical Frequency Combs
Abstract In this paper, we have designed a low-overhead low-complexity carrier phase tracking scheme for OFDM-based superchannel transmission system enabled by optical frequency combs. In this scheme, taking advantage of the broadband phase coherence provided by optical frequency combs among the OFDM-bands, the carrier phase retrieved from pilot-subcarriers
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-03
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2. Effect of Lime Addition to CaSO 4 Oxygen Carrier in Chemical Looping Combustion
Abstract Chemical-looping combustion (CLC), which has the characteristic of greenhouse gas CO2 inherent separation, is a novel combustion technology. In this study, CLC experiments of methane using CaSO4 oxygen carrier with lime addition were carried out in a batched fluidized bed reactor, where the sample was exposed to alternate oxidizing and reducing cond
Braz. J. Chem. Eng.. Publicado em: 2018-01
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3. Liposomes as potential carriers for ketorolac ophthalmic delivery: formulation and stability issues
ABSTRACT Drug delivery to treat ocular disorders locally is a challenging endeavor. Traditional ocular dosage form - eye drops - exhibits poor availability, consequently inefficient therapeutic response. The objective of the study was to formulate and characterize a ketorolac tromethamine ocular system with a prolonged release pattern based on liposomes as a
Braz. J. Pharm. Sci.. Publicado em: 22/06/2017
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4. Immune response in hamsters immunised with a recombinant fragment of LigA from Leptospira interrogans, associated with carrier molecules
Immunisation with the C-terminal region of leptospiral immunoglobulin-like A protein (LigANI) has shown promising results against leptospirosis. We evaluated the humoral immune response and protection induced by LigANI associated with carboxyl multi-walled carbon nanotubes (COOH-MWCNTs), CpG oligodeoxynucleotides (CpG ODNs), or Alhydrogel. Animals immunised
Mem. Inst. Oswaldo Cruz. Publicado em: 13/10/2016
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5. Functionalized Multi Walled Carbon Nanotubes as a Carrier for Doxorubicin: Drug Adsorption Study and Statistical Optimization of Drug Loading by Factorial Design Methodology
Multi walled carbon nanotubes (MWNTs) have been identified as an efficient drug carrier. Here a controlled drug delivery system based on modified MWNTs with polyethylene glycol (PEG) was developed (MWNTs-PEG). Then doxorubicin (DOX) as an anticancer drug loaded to nanocarrier. All the parameters affecting the DOX adsorption such as: dose of adsorbent, pH, in
J. Braz. Chem. Soc.. Publicado em: 2016-04
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6. Bifunctional Porous SiO2 Complex Nanoparticles with Properties of Enzymatic Catalysis and Optical Oxygen Sensing
The porous fluorescent SiO2 nanoparticles encapsulating photosensitizer Ru(bpy)3Cl2were prepared by Stöber method and used as a carrier to immobilize glucose oxidase (GOD) to form the bifunctional porous SiO2 complex nanoparticles (BPSCNp) with the properties of enzymatic catalysis and optical oxygen sensing. The optimal immobilization conditions are as fol
J. Braz. Chem. Soc.. Publicado em: 2015-09
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7. Thermal Control Design Conception of the Amazonia-1 Satellite
ABSTRACT: Amazonia-1 is a Brazilian remote sensing satellite providing mainly images, in order to observe and monitor deforestation, especially in the Amazon region. This paper describes the thermal control design, which uses passive and active concepts. The active thermal control is based on heaters regulated by software via thermistors. The passive thermal
J. Aerosp. Technol. Manag.. Publicado em: 2014-06
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8. Sistemas de análises químicas em fluxo explorando mecanismos de re-alimentação, calibração multivariada e outras abordagens para melhoria em desempenho / Flow systems exploiting feed-back mechanisms, multivariate calibration and other strategies for improving the analytical performance
Studies focusing on performance of intelligent analytical flow systems, association with multivariate calibration or use of nanocrystals as sensitizers were carried out. Moreover, improvements related to modifications in flow pattern were evaluated with emphasis to in-line dialysis. To this end, a strategy for implementing simultaneous determinations of iron
Publicado em: 2010
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9. Anorexia nervosa na adolescência: um problema de família?
The unbalanced relationship of the individual with his way of eating has concerned the health mental specialists. Anorexia Nervosa is characterized by a weight loss stress, result of a restricted calorie volunteered patient due to an exacerbated fear of gaining weight and the desperate search of being slim. Studies show occurrence of young people and the ave
Publicado em: 2009
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10. Essays in Applied Econometrics
This thesis is divided in three essays. The first essay examines the reactions by incumbent airlines to the threat and actual entry of the low-cost carrier Gol in the Brazilian domestic air transport market. By estimating the reactions in prices, quantities and supply variables, it investigates the plausibility of theories of entry deterrence and accommodati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200810
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11. CHANNEL ESTIMATION AND SIGNAL DETECTION IN CDMA SYSTEMS WITH MULTI CARRIER / ESTIMAÇÃO DE CANAL E DETECÇÃO DE SINAIS EM SISTEMAS CDMA COM MÚLTIPLAS PORTADORAS
Este trabalho investiga o impacto da utilização de técnicas para melhorar a qualidade da estimação de canal em sistemas MC CDMA (Multi Carrier Code Division Multiple Access) e MC DS CDMA (Multi Carrier Direct Sequence Code Division Multiple Access) em canais seletivos em frequência. Dois tipos de intevalos de guarda são considerados: Prefixo Cíclico
Publicado em: 2008
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12. MI-SBTVD: a proposal for the Brazilian digital television system SBTVD
The objective of this paper is to present a general overview of the Innovative Modulation System Project -MI-SBTVD - developed for the Brazilian Digital TV System. The MI-SBTVD Project includes an LDPC high performance error correcting code, an advanced transmit spatial diversity and an efficient multi-carrier modulation scheme. The building blocks of the sy
Journal of the Brazilian Computer Society. Publicado em: 2007-03