Publicações - engenharias
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Marcelo Kaminski Lenzi;
Marcos Lúcio Corazza;
Eduarda Molardi Bainy;
Gláucio M Marini
Palavra-chave:
freezing;
meat products
Áreas do conhecimento:
Engenharias; Fenômenos de Transporte; Princípios Variacionais e Métodos Numéricos
resumo ...
(en)
Freezing is a commonly used preservation method in the meat industry. The understanding of the product behavior during the freezing process can assist in a better process management and quality control. This work reports the study of freezing and thawing of three types of processed meat in order to determine process parameters in an industrial forced‑air freezing tunnel at ‑30oC. Chicken sausages (frankfurter type), mortadela (bologna type) and mechanically deboned chicken meat (MDCM) were studied. Products were placed in several layers in corrugated cardboard boxes (CCB) for sausages and mortadela. MDCM was placed in a nylon box. Temperature sensors were inserted in the products and the freezing and thawing curves were obtained. Freezing curves were used to determine the freezing time (tf), initial freezing point (Tf) and final freezing point (T’m). Products placed in different layers in the CCB had significantly different freezing times, being the higher rates for products placed in more external layers than internal ones. The external layers of product were subjected to heat transfer by convection showing its importance to decrease freezing time. The results strongly suggest that products placed in different layers could have distinct quality properties and also play a key role in the freezing process efficiency.
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TADANO, YARA S.;
MARTIN, LUCAS;
Carlos Itsuo Yamamoto;
GODOI, RICARDO H.M.;
BORILLO, GUILHERME C.;
GODOI, ANA FLÁVIA L.;
CICHON, AMANDA;
SILVA, THIAGO O.B.;
VALEBONA, FÁBIO B.;
ERRERA, MARCELO R.;
PENTEADO NETO, RENATO A.;
REMPEL, DENNIS
Palavra-chave:
Exhaust emission;
Diesel biodiesel;
Selective catalytic reduction system (SCR);
Health risk assessment;
AERMOD simulation
resumo ...
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Ricardo Henrique Moreton Godoi;
Yara S. Tadano;
PENTEADO NETO, RENATO A.;
Ana Flávia Locatelli Godoi;
Marcelo Risso Errera;
et al
Palavra-chave:
poluição do ar;
qualidade do ar;
BIOCOMBUSTÍVEIS;
Controle Ambiental;
Emissões automotivas
Áreas do conhecimento:
Engenharias; Engenharia Térmica; Controle Ambiental;
Outros; Ciências Ambientais; Engenharia Ambiental;
Engenharias; Engenharia Mecânica; Projetos de Máquinas; Máquinas, Motores e Equipamentos
resumo ...
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IGARASHI, ADRIEL Y. S.;
Gideon Villar Leandro;
OLIVEIRA, GUSTAVO H. C.;
LEITE, EDUARDO A.
Palavra-chave:
fuzzy logic;
lightning;
Warnings
Áreas do conhecimento:
Engenharias; Engenharia Elétrica
resumo ...
This paper presents a new method using Fuzzy Logic for generating lightning warnings. This methodology uses information about the atmospheric electric field, the lightning dynamics around the interest site, and lightning distance information. This information was combined by Fuzzy Logic which had its membership functions optimized by Genetic Algorithms. In addition, the objective function was composed by multiple performance indicators proposed in this work. The proposed methodology was tested in a case study, generating lightning warning for an oil refinery. The results were compared with other methods and it was concluded that this new method shows up to be the most effective in generating lightning warnings.
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SOUZA, MARIANA ROSSI DE;
OLIVEIRA, NILSON T. C;
Neide Kazue Kuromoto;
MARINO, CLÁUDIA E. B.
Palavra-chave:
Biomaterial;
self-organized TiO2 nanotubes layer
Áreas do conhecimento:
Engenharias; Engenharia de Materiais e Metalúrgica; biomateriais metálicos;
Engenharias; Engenharia Biomédica; Engenharia Médica; Biomateriais e Materiais Biocompatíveis
resumo ...
Titanium and its alloys are biomaterials used in endosseous implants, due to desirable...
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Daniel Mauricio Muñoz Arboleda;
Carlos Humberto Llanos Quintero;
LEANDRO DOS SANTOS COELHO;
Mauricio Ayala-Rincón
Palavra-chave:
robôs móveis;
otimização por enxame de partículas;
hardware evolucionário
Áreas do conhecimento:
Engenharias; Robótica; Robótica Móvel;
Engenharias; Engenharia Elétrica; Inteligência Artificial; Inteligência Computacional
resumo ...
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Marcelino Luiz Gimenes;
da Silva, Vítor R.;
Meuris Gurgel Carlos da Silva;
Melissa Gurgel Adeodato Vieira;
SCHEER, A.P.
International Journal of Chemical Engineering and Applications,
v. 5,
n. 3,
p. 266-271,
2014
Home page
Palavra-chave:
sericin;
Extraction;
ultrafiltration;
fouling
resumo ...
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Carlos Gabriel Bianchin;
GULES, ROGER;
BADIN, ALCEU;
RIBEIRO ROMANELI, EDUARDO
Palavra-chave:
Controle digital via DSP;
Conversão AC-DC;
Retificadores
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações
resumo ...
The theoretical and experimental analysis of a modified version of the SEPIC dc-dc converter used as preregulator operating in discontinuous conduction mode (DCM) is presented in this paper. The proposed converter presents a low input current ripple operating in DCM, and the switch voltage is lower than the output voltage. The switch voltage reduction increases the converter reliability and a low drain-to-source on-resistance (RDS
<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">on</sub>
) MOSFET can be used depending on the converter specification. Moreover, a digital control technique is applied to the proposed converter in order to reduce the third-harmonic input current distortion resultant of the operation in DCM. Finally, a 100-W prototype was developed operating with efficiency equal to 95.6%.
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Regina Maria Matos Jorge;
Regina Maria Matos Jorge;
Regina Maria Matos Jorge
Palavra-chave:
diffusion;
kinetic model;
cereals and grains;
chemical composition;
Physical properties;
food properties
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações
resumo ...
The hydration kinetics of transgenic corn types flint DKB 245PRO, semi-flint DKB 390PRO, and...
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Eduardo M. Szesz;
G. B. de Souza;
DE LIMA, GABRIEL G.;
DA SILVA, BRUNO A.;
Neide Kazue Kuromoto;
Carlos Maurício Lepienski
Palavra-chave:
shot blasting;
micro-arc oxidation;
titanium dioxide film
resumo ...
The combination of shot blasting (SB) and micro-arc oxidation (or anodic oxidation—AO) in titanium surfaces was shown to provide enhanced conditions for cell differentiation and osseointegration than those provided by SB or AO alone. This study associated both methods aiming to attain titania layers on Ti with adequate tribo-mechanical features for bone implants. SB was performed using alumina particles, and titania layers were grown by AO using a CaP-based electrolyte. Mechanical properties and scratch resistance were characterized at nanoscale by instrumented indentation and nanoscratch, and correlated with morphological and microstructural changes (XRD, SEM, EDS, AFM, and profilometry). Analytical methods were employed to correct roughness and substrate effects on the indentation results. CaP-containing TiO2 layers were produced on AO and SB + AO. The latter presented small pore size and inhomogeneous layer thickness and Ca/P ratios, caused by the non-uniform surface straining by SB that affects the oxide growth kinetics in the electrochemical process. Elastic modulus of SB + AO layer (37 GPa) were lower than the AO one (45 GPa); both of them were smaller than bulk Ti (130 GPa) and close to bone values. The hardness profiles of AO and SB + AO were similar to the substrate ones. Because of the improved load bearing capacity and unique layer features, the critical load to remove the SB + AO titania coating in scratch tests was three times as much or higher than in AO. Results indicate improved mechanical biocompatibility and tribological strength of anodic titania layers grown on sand blasted Ti surfaces.
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