Search results for: Victor Torres

Items from 1 to 20 out of 84 results

article

Inclusion of grape bagasse (Vitis sp.) in the diet of white shrimp (Litopenaeus vannamei) and its effects on growth and antioxidant system

Victor Torres Rosas, Rafael Aleixo Mureb, José María Monserrat, Wilson Wasielesky, more

Aquaculture Research > 53 > 13 > 4805 - 4813

Innovation in aquaculture nutrition is linked to the use of new compounds, in order to achieve a more sustainable production. The grapefruit industry is one of the biggest in the fruit sector due to the enormous wine and juice production. As a consequence, tons of grape bagasse (GB) turn into waste every year, a product rich in antioxidants such as polyphenols (PPS). Shrimp Litopenaeus vannamei is...

article

Integrated, Ultra‐Compact High‐Q Silicon Nitride Microresonators for Low‐Repetition‐Rate Soliton Microcombs

Zhichao Ye, Fuchuan Lei, Krishna Twayana, Marcello Girardi, more

Laser & Photonics Reviews > 16 > 3 > n/a - n/a

Multiple applications of relevance in photonics, such as spectrally efficient coherent communications, microwave synthesis or the calibration of astronomical spectrographs, would benefit from soliton microcombs operating at repetition rates <50GHz. However, attaining soliton microcombs with low repetition rates using photonic integration technologies represents a formidable challenge. Expanding...

article

Hyperintensive stocking densities for Litopenaeus vannamei grow‐out in biofloc technology culture system

Lucas Genesio P. da Silveira, Dariano Krummenauer, Luís H. Poersch, Victor Torres Rosas, more

Journal of the World Aquaculture Society > 51 > 6 > 1290 - 1300

Searching for potential increases in shrimp yields, this study evaluated the effects of different stocking densities on water quality and production performance of juvenile shrimp, Litopenaeus vannamei, reared on a biofloc‐dominated system throughout 77 days. The organisms (1.27 ± 0.54 g) were stocked at three densities, 400 (T400), 500 (T500), and 600 (T600) shrimp/m² corresponding to 500, 625, and...

article

Proteomic characterization of human sperm plasma membrane‐associated proteins and their role in capacitation

Gabriela Hernández‐Silva, Jorge Elías Fabián López‐Araiza, Aideé Saray López‐Torres, Fernando Larrea, more

Andrology > 8 > 1 > 171 - 180

Background Plasma membranes of ejaculated sperm are covered by epididymal and accessory glands secreted proteins that must be released from sperm surface during the female reproductive tract passage in order to capacitate and fertilize the oocyte. Objectives As human sperm plasma membrane‐associated proteins (SMAP) have not yet been investigated, the aim of this study was to characterize the SMAP...

article

Construction with opposition: cardinal invariants and games

Jörg Brendle, Michael Hrušák, Víctor Torres-Pérez

Archive for Mathematical Logic > 2019 > 58 > 7-8 > 943-963

We consider several game versions of the cardinal invariants $${\mathfrak {t}}$$ t , $${\mathfrak {u}}$$ u and $${\mathfrak {a}}$$ a . We show that the standard proof that parametrized diamond principles prove that the cardinal invariants are small actually shows that their game counterparts are small. On the other hand we show that $${\mathfrak {t}}<{\mathfrak {t}}_{Builder}$$...

article

Comparison of β-carotene and Spirulina (Arthrospira platensis) in mullet (Mugil liza) diets and effects on antioxidant performance and fillet colouration

Victor Torres Rosas, José María Monserrat, Martin Bessonart, Larisa Magnone, more

Journal of Applied Phycology > 2019 > 31 > 4 > 2391-2399

The addition of pure carotenoids is a common practice in some aquaculture species production since its use in fish feed is known to improve carcass and antioxidant capacity. Spirulina (Arthrospira) cyanobacteria are a rich source of carotenoids that has proven health benefits for fish welfare. In the current experiment, four isonitrogenous (38%) isolipidic (9%) diets were made, including a control...

article

On-farm milk cooling solution based on insulated cans with integrated ice compartment

Victor Torres-Toledo, Alice Hack, Farah Mrabet, Ana Salvatierra-Rojas, more

International Journal of Refrigeration > 2018 > 90 > C > 22-31

A solution for on-farm milk cooling was assessed under controlled laboratory conditions. The basic principle is to use insulated milk cans with an integrated ice compartment for the transport of morning milk and the storage of evening milk with a maximum capacity of 30 L milk and 8 kg ice. The experimental results show the ability of the system to cool down 30 L milk to 17 °C in less than 90 min with...

chapter

Silicon-rich nitride waveguides for broadband nonlinear signal processing

Victor Torres-Company, Clemens J. Kruckel, Attila Fulop, Peter A. Andrekson

2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR) > 1 - 3

2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Silicon nitride waveguides are among the most promising platforms for nonlinear optical processing applications. In this invited contribution we will highlight how the dispersion and Kerr coefficient (n2) can be tuned by precisely controlling the stoichiometry of the waveguide's core material.

article

Toxicity and parasiticidal in vivo and in vitro evaluation of acetic acid on metazoan ectoparasites in juvenile Mugil liza

Mário Roberto Castro Meira-Filho, Victor Torres Rosas, Rogério Tubino Vianna, Joaber Pereira Júnior

Aquaculture > 2017 > 476 > C > 1-7

In this study, the anti-parasitic activity of acetic acid was evaluated in vivo and in vitro in juveniles of Mugil liza. The parasites studied were the copepods Ergasilus lizae and E. versicolor and the monogenoideans Solostamenides cf. platyorchis and Ligophorus spp. To determine concentrations for use in the in vivo evaluation, and to determine the therapeutic index, a toxicity test (LC₅₀-1h) was...

chapter

Active feedback stabilization of normal-dispersion microresonator combs

Attila Fulop, Pei-Hsun Wang, Yi Xuan, Dan E. Leaird, more

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) > 1

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

Silicon nitride microresonators provide a potentially CMOS-compatible platform for optical frequency comb generation [1]. As in any high-Q microcavity, thermal effects strongly affect the dynamics. This is particularly true considering that typical continuous wave pump powers for microresonator comb generation operate in the 20–35 dBm range. Temporal bright solitons for instance are generated when...

chapter

Towards on-chip net-gain in CMOS-compatible waveguides

Clemens J. Kruckel, Peter A. Andrekson, Victor Torres-Company

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) > 1

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

On-chip optical parametric gain was first demonstrated in a silicon waveguide using a pulsed pump source [1]. However, the realization of optical net-gain with a continuous-wave (CW) pump remains a challenge in integrated platforms. Highly nonlinear fibers can provide parametric gain with CW pump [2]. The key advantage of this low-loss platform is its long effective length L_eff, which results in a...

article

Design of Continuous Twisting Algorithm

Víctor Torres-González, Tonametl Sanchez, Leonid M. Fridman, Jaime A. Moreno

Automatica > 2017 > 80 > C > 119-126

For the double integrator with matched Lipschitz disturbances we propose a continuous homogeneous controller providing finite-time stability of the origin. The disturbance is compensated exactly in finite time using a discontinuous function through an integral action. Since the controller is dynamic, the closed loop is a third order system that achieves a third order sliding mode in the steady state...

chapter

Bandgap engineering in nonlinear silicon nitride waveguides

Clemens J. Kruckel, Attila Fulop, Peter A. Andrekson, Victor Torres-Company

2017 Optical Fiber Communications Conference and Exhibition (OFC) > 1 - 3

2017 Optical Fiber Communications Conference and Exhibition (OFC)

We show that controlling the bandgap of SiN provides an additional degree of freedom for engineering waveguides for nonlinear optics. We show an optimized structure with γ· max L_eff = 0.17 rad/W and absence of nonlinear loss.

chapter

Frequency noise of a normal dispersion microresonator-based frequency comb

Attila Fulop, Mikael Mazur, Abel Lorences-Riesgo, Pei-Hsun Wang, more

2017 Optical Fiber Communications Conference and Exhibition (OFC) > 1 - 3

2017 Optical Fiber Communications Conference and Exhibition (OFC)

Using delayed self-heterodyne coherent detection, we characterized the FM noise across the C-band of a widely spaced microresonator-based frequency comb. The resulting linewidth depends on both the pump laser and the comb line position.

chapter

Long-haul coherent transmission using a silicon nitride microresonator-based frequency comb as WDM source

Attila Fulop, Mikael Mazur, Tobias A. Eriksson, Peter A. Andrekson, more

2016 Conference on Lasers and Electro-Optics (CLEO) > 1 - 2

2016 Conference on Lasers and Electro-Optics (CLEO)

We demonstrated transmission of polarization-multiplexed quadrature phase-shift keying data over 6000 km using a low-noise silicon nitride microresonator frequency comb as light source. These results show the technology's suitability for long-haul fiber communications.

chapter

Octave-spanning supercontinuum generation in a silicon-rich nitride waveguide

Xing Liu, Binbin Zhou, Morten Bache, Clemens J. Kruckel, more

2016 Conference on Lasers and Electro-Optics (CLEO) > 1 - 2

2016 Conference on Lasers and Electro-Optics (CLEO)

We generate supercontinuum (817–2250 nm at −30dB) in a dispersion-engineered silicon-rich nitride waveguide by pumping fs pulses with 82 pJ from an erbium-fiber oscillator. Spectral broadening mechanisms include soliton fission and dispersive wave generation.

article

Design and performance of a small-scale solar ice-maker based on a DC-freezer and an adaptive control unit

Victor Torres-Toledo, Klaus Meissner, Philip Täschner, Santiago Martınez-Ballester, more

Solar Energy > 2016 > 139 > C > 433-443

The presented work studies the use of a commercial freezer to produce ice efficiently by photovoltaic energy. An innovative control unit was developed which adapts the operation of the compressor to the availability of solar energy. The proposed solar ice-maker was analysed with the help of simulations and experiments for the location of Sidi Bouzid in Tunisia. A design methodology was presented to...

article

Design and performance of a new FACE (free air carbon dioxide enrichment) system for crop and short vegetation exposure

Andreas Fangmeier, Victor Torres-Toledo, Jürgen Franzaring, Walter Damsohn

Environmental and Experimental Botany > 2016 > 130 > C > 151-161

Current atmospheric CO₂ levels are unprecedented for the last 800,000 years and require assessments of their potential effects. Free Air Carbon dioxide Enrichment (FACE) is regarded as the most appropriate exposure system for experimental field investigations. While the early FACE technology involved fans for pre-dilution of CO₂, now systems both with fans and without fans operating with pure CO₂...

chapter

Cross-phase-modulation-based wavelength conversion in low-stress silicon-rich nitride waveguide

Mohammad Rezagholipour Dizaji, Clemens J. Kruckel, Attila Fulop, Peter A. Andrekson, more

2016 Optical Fiber Communications Conference and Exhibition (OFC) > 1 - 3

2016 Optical Fiber Communications Conference and Exhibition (OFC)

We report cross-phase-modulation-based wavelength conversion of 10 Gb/s RZ-OOK using a low-stress silicon-rich nitride waveguide. The waveguide is engineered to display flat and low dispersion over the entire C+L bands.

chapter

Rights and Trust in Multimedia Information Management

Jaime Delgado, Víctor Torres, Silvia Llorente, Eva Rodríguez

Lecture Notes in Computer Science > Communications and Multimedia Security > DRM & E-Commerce > 55-64

Multimedia information management, which implies all steps from creation and production to distribution and consumption, is a complex and challenging research area. To have a secure and trusted system we need to take into account aspects such as digital rights management (DRM), certification, control and security. As current solutions rely on proprietary architectures and tools, we propose an open...

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INFONA - science communication portal

Search results for: Victor Torres

Inclusion of grape bagasse (Vitis sp.) in the diet of white shrimp (Litopenaeus vannamei) and its effects on growth and antioxidant system

Integrated, Ultra‐Compact High‐Q Silicon Nitride Microresonators for Low‐Repetition‐Rate Soliton Microcombs

Hyperintensive stocking densities for Litopenaeus vannamei grow‐out in biofloc technology culture system

Proteomic characterization of human sperm plasma membrane‐associated proteins and their role in capacitation

Construction with opposition: cardinal invariants and games

Comparison of β-carotene and Spirulina (Arthrospira platensis) in mullet (Mugil liza) diets and effects on antioxidant performance and fillet colouration

On-farm milk cooling solution based on insulated cans with integrated ice compartment

Silicon-rich nitride waveguides for broadband nonlinear signal processing

Toxicity and parasiticidal in vivo and in vitro evaluation of acetic acid on metazoan ectoparasites in juvenile Mugil liza

Active feedback stabilization of normal-dispersion microresonator combs

Towards on-chip net-gain in CMOS-compatible waveguides

Design of Continuous Twisting Algorithm

Bandgap engineering in nonlinear silicon nitride waveguides

Frequency noise of a normal dispersion microresonator-based frequency comb

Long-haul coherent transmission using a silicon nitride microresonator-based frequency comb as WDM source

Octave-spanning supercontinuum generation in a silicon-rich nitride waveguide

Design and performance of a small-scale solar ice-maker based on a DC-freezer and an adaptive control unit

Design and performance of a new FACE (free air carbon dioxide enrichment) system for crop and short vegetation exposure

Cross-phase-modulation-based wavelength conversion in low-stress silicon-rich nitride waveguide

Rights and Trust in Multimedia Information Management

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