Estrus identification methods as an alternative to optimize IATF results.

The objective of the present study was to compare the efficacy of different techniques for detection of estrus in Nellore cows submitted to FTAI protocols and their relationships with fertility

Generalized Species Sampling Priors with Latent Beta reinforcements

Many popular Bayesian nonparametric priors can be characterized in terms of exchangeable species sampling sequences. However, in some applications, exchangeability may not be appropriate. We introduce a {novel and probabilistically coherent family of non-exchangeable species sampling sequences characterized by a tractable predictive probability function with weights driven by a sequence of independent Beta random variables. We compare their theoretical clustering properties with those of the Dirichlet Process and the two parameters Poisson-Dirichlet process. The proposed construction provides a complete characterization of the joint process, differently from existing work. We then propose the use of such process as prior distribution in a hierarchical Bayes modeling framework, and we describe a Markov Chain Monte Carlo sampler for posterior inference. We evaluate the performance of the prior and the robustness of the resulting inference in a simulation study, providing a comparison with popular Dirichlet Processes mixtures and Hidden Markov Models. Finally, we develop an application to the detection of chromosomal aberrations in breast cancer by leveraging array CGH data.Comment: For correspondence purposes, Edoardo M. Airoldi's email is [email protected]; Federico Bassetti's email is [email protected]; Michele Guindani's email is [email protected] ; Fabrizo Leisen's email is [email protected]. To appear in the Journal of the American Statistical Associatio

Decoupled control for double-T Dc-Dc MMC topology for MT-HVdc/MVdc grids

This paper proposes a decoupled control of a dc-dc modular multilevel converter (MMC) based on a double-T topology intended for multi-terminal high voltage direct current (MT-HVdc) transmission systems or emerging distribution systems operating in medium voltage direct current (MVdc). The aim of the proposed control strategy is to obtain an input current with reduced harmonic content and to eliminate the output ac common-mode voltage, which is not allowed in MT-HVdc systems. The control strategy consists of injecting two circulating ac currents and two dc currents that allow the energy balance between the arms of the converter and the general energy balance of the topology. The dc and ac currents are decoupled and allow control over load variations and reference changes in the dc-links. The proposed topology is mathematically modeled and the control method is then derived. Simulation results are presented to validate the proposed system

Impact of manufacturing tolerances on axial flux permanent magnet machines with ironless rotor core: a statistical approach

Axial Flux Permanent Magnet (AFPM) machines with ironless rotors are an attractive and recently studied solution in low-speed applications, due to their potentially high power/weight ratio, high aspect ratio, and high efficiency. Nevertheless, these machines are prone to be affected by manufacturing tolerance during its fabrication process and consequently, the magnets may move freely inside the rotor structure. This work presents a statistical analysis of manufacturing tolerances of an AFPM machine with an ironless rotor, considering several magnet fault types. A computationally efficient superposition method is developed and implemented to obtain both the cogging torque and rated torque considering several tolerance combinations with acceptable accuracy. The results obtained from a statistical analysis of 10,000 designs of a two-stator one rotor tooth coil winding AFPM (TCW-AFPM) machine allowed us to identify the parameters with the most impact on relevant performance indicators and disclosed a substantial increase in cogging and ripple torque when unavoidable combined tolerances are present

Motility and recovery of alpaca (Vicugna pacos) spermatozoa after centrifugation in a density gradient solution

Background: One of the factors limiting successful processing of alpaca (Vicugna pacos) semen is the viscosity of seminal plasma. The viscous nature of the collected ejaculate has hindered sperm cryopreservation as well as artificial insemination (AI) under field conditions. Aims: The objective of this investigation was to evaluate recovery, motility, and plasma membrane integrity of alpaca spermatozoa after centrifugation in one of two different solutions at one of three different combinations of speed and time. Methods: A total of 24 ejaculates was recovered from seven reproductively sound Huacaya males using a modified artificial vagina (AV) after training the animals for semen collection. A 2 × 3 factorial treatment arrangement was utilized for this study. Ejaculates were divided into fractions for centrifugation in one of two solutions (Tris extender or PureSperm®80 density gradient solution) at one of three combinations of speed and time (492 × g for 15 min, 1968 × g for 10 min, or 4448 × g for 7 min). The experiment was replicated eight times. Results: Analysis revealed that centrifugation at 4448 × g for 7 min in PureSperm®80 provided a high recovery rate of spermatozoa with the highest sperm motility and functional integrity of plasma membrane post-centrifugation. Conclusion: Results suggest that adoption of this procedure (centrifugation at 4448 × g for 7 min in PureSperm®80) in the initial processing of alpaca ejaculates may enhance subsequent ability to use semen for AI and other assisted reproductive biotechnologies in this speciesFil: Gómez Quispe, O. E.. Universidad Nacional Agraria La Molina; Perú. Universidad Nacional Micaela Bastidas de Apurímac; PerúFil: Gutiérrez Reynoso, G. A.. Universidad Nacional Agraria La Molina; PerúFil: Gallegos Cardenas, A.. Universidad Nacional Agraria La Molina; PerúFil: Fumuso, Fernanda Gabriela. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Asparrin, M.. Fundo Mallkini de Michael & Cia S.A.; PerúFil: Asparrin Del Carpio, M.. Fundo Mallkini de Michael & Cia S.A.; PerúFil: Jara, C. W.. Fundo Mallkini de Michael & Cia S.A.; PerúFil: Ponce, D.. Vivanco International SAC; PerúFil: Miguel, M.. Vivanco International SAC; PerúFil: Youngs, C. R.. Iowa State University; Estados UnidosFil: Vivanco, H. W.. Vivanco International SAC; Per

Heat score accessed with aid of tail-chalk influences pregnancy rate of suckled Bos indicus beef cows subjected to P4/estradiol TAI-based protocols.

It is known that cows that express estrus submitted to TAI protocols, have better pregnancy rates (Borges et al. 2011). So the goal was to test alternative to visual estrus observation, evaluating the effect of estrus expression with the assistance of tail-chalk on pregnancy rates and the pre-ovulatory follicle diameter in beef cows submitted to TAI protocols with use of two ovulation inducers: estradiol benzoate (EB) and estradiol cypionate (ECP).Proceedings of the 30th Annual Meeting of the Brazilian Embryo Technology Society (SBTE); Foz do Iguaçu, PR, Brazil, August 25th to 27th, 2016, and 32nd Meeting of the European Embryo Transfer Association (AETE); Barcelona, Spain, September 9th and 10th, 2016. A077. Título em português: Escore de cio avaliado com bastões marcadores influencia as taxas de gestação de vacas nelore submetidas a protocolos de inseminação artificial em tempo fixo

Efficiency of post FTAI manegement in lacting beef cows.

The study aimed evaluate the effectiveness of TAI post reproductive management in lacting beef cows. Were inseminated at fixed time, 607 Nellore multiparous with 45 days postpartum, calved in November and inseminated with 5 Angus bulls in January 2015 in MS state farm.Proceedings of the 30th Annual Meeting of the Brazilian Embryo Technology Society (SBTE); Foz do Iguaçu, PR, Brazil, August 25th to 27th, 2016, and 32nd Meeting of the European Embryo Transfer Association (AETE); Barcelona, Spain, September 9th and 10th, 2016. A078. Título em português: Eficiência das técnicas de manejo reprodutivo pós-inseminação artificial em tempo fixo (IATF) em vacas de corte paridas. Na publicação: Juliana Correa Borges

Internet of things

Manual of Digital Earth / Editors: Huadong Guo, Michael F. Goodchild, Alessandro Annoni .- Springer, 2020 .- ISBN: 978-981-32-9915-3Digital Earth was born with the aim of replicating the real world within the digital world. Many efforts have been made to observe and sense the Earth, both from space (remote sensing) and by using in situ sensors. Focusing on the latter, advances in Digital Earth have established vital bridges to exploit these sensors and their networks by taking location as a key element. The current era of connectivity envisions that everything is connected to everything. The concept of the Internet of Things(IoT)emergedasaholisticproposaltoenableanecosystemofvaried,heterogeneous networked objects and devices to speak to and interact with each other. To make the IoT ecosystem a reality, it is necessary to understand the electronic components, communication protocols, real-time analysis techniques, and the location of the objects and devices. The IoT ecosystem and the Digital Earth (DE) jointly form interrelated infrastructures for addressing today’s pressing issues and complex challenges. In this chapter, we explore the synergies and frictions in establishing an efficient and permanent collaboration between the two infrastructures, in order to adequately address multidisciplinary and increasingly complex real-world problems. Although there are still some pending issues, the identified synergies generate optimism for a true collaboration between the Internet of Things and the Digital Earth

Características agronómicas, componentes de producción y rendimiento de grano de híbridos de maíz (Zea mays)

El objetivo de este estudio fue evaluar las características agronómicas, componentes de producción y rendimiento de grano de híbridos de maíz en la región Lambayeque y determinar los de comportamiento similar o superior a dos híbridos comerciales de la zona. El diseño experimental fue bloques completos al azar con 23 tratamientos y cuatro repeticiones, cada parcela constaba de cinco hileras de 4,9 m separadas a 0,75 m, con dos plantas cada 0,35 m. Las variables evaluadas fueron: rendimiento de grano (t ha-1), altura de planta, altura de mazorca, floración masculina y femenina, índice de prolificidad, longitud y diámetro de mazorca, número de hileras, número de granos por hilera, peso de mazorca y de grano y peso de mil granos. Los híbridos que mostraron mejor rendimiento fueron CLYN240×CML451Q, CLYN240×CLO2720, CLRYNO44×CML297, CLRYNO44×CLO2450, CLYN205×CLYN240, CLRYNO17×CLO2450, CML161×CLYN240, CLO2450×CML287, CLO2450×CML297, CLYN240×CML287, CLQRCY49×CLO2450, CLRYNO17×CML287, CML297×CML161, siendo similares al INIA619 y superiores al INIA605. Uno de los híbridos con mejores características fue CLYN240×CML451Q que obtuvo el mejor rendimiento de grano, una relación altura de mazorca/altura de planta de 0,51, el mayor número de hileras y uno de los más altos valores en cuanto a longitud de mazorca, peso de mazorca y peso de grano