Rediseño de la línea de ensamble Long Block ISV 5.0L V8 manteniendo los requerimientos de calidad

Omar Annuar Guel Quiroz (2023)

Desde hace tiempo, el ser humano ha sido capaz de realizar procesos de manufactura para poder cumplir la necesidad que hoy en día muchos de nosotros vivimos tales como la fabricación de un producto o incluso la recuperación de este, aquí es donde entra la remanufactura de partes de ciertos productos terminados para poderlos salvar y posteriormente volverlos a usar dando como resultado el incremento de lo que nosotros conocemos como vida útil del producto. Durante la recuperación de partes de un motor de combustión interna se encuentran diferentes componentes tales como el monoblock, cigüeñal, pistones, bielas, cabezas de cilindro entre otros. Para llevar a cabo la recuperación de estos componentes deben de pasar ciertas pruebas tanto por calidad como durante el proceso de retrabajo. Algunos de ellos como el cigüeñal deben cumplir ciertas expectativas y ciertos estándares de limpieza que este componente se encuentra en el corazón del motor por lo que es uno de los componentes más importantes que se deben de cuidar ya que cualquier contaminación o rebaba metálica puede causar que el motor se amarre o bien, que su función principal sea deficiente. Es por ello por lo que se emplean procesos de limpieza como el lavado de componentes de diferentes tipos en base a las condiciones en las que se encuentran estos componentes usando agua, químicos especiales y un tiempo de ciclo definido para completar esta limpieza. Viéndolo por otro lado el departamento de calidad deberá de asegurarse que estos componentes estén en buenas condiciones mediante pruebas y análisis que se someten después de un proceso de manufactura establecido para poder llevar el control del proceso tales como las pruebas millipore. La inclusión de las pruebas millipore se encuentran en las principales pruebas ya que ellas ayudan a detectar el peso de partículas, así como el tipo de partículas. La integración de estas pruebas asegura que los componentes críticos de un motor estén en buenas condiciones ya que fortalece la aceptación del material a usar en la línea de ensamble y evitar reclamos de calidad o bien retrabajos en línea posteriores.

For a long time, the human being has been able to perform manufacturing processes to meet the need that many of us live today such as the manufacture of a product or even the recovery of this, this is where the remanufacturing of parts of certain finished products to save them and then reuse them resulting in the increase of what we know as product life. During the recovery of parts from an internal combustion engine there are different components such as the monoblock, crankshaft, pistons, connecting rods, cylinder heads, among others. In order to carry out the recovery of these components, they must pass certain tests both for quality and during the remanufacturing process. Some of them, such as the crankshaft, must meet certain expectations and standards of cleanliness. This component is located in the heart of the engine, so it is one of the most important components that must be taken care of, since any contamination or metallic burr can cause the engine to bind or its main function to be deficient. That is why cleaning processes such as washing of different types of components are used based on the conditions in which these components are found using water, special chemicals and a defined cycle time to complete this cleaning. On the other hand, the quality department must ensure that these components are in good condition by testing and analyzing them after an established manufacturing process in order to control the process such as millipore testing. The inclusion of millipore testing is one of the main tests that help to detect particle weight as well as particle type. The integration of these tests ensures that the critical components of an engine are in good condition as it strengthens the acceptance of the material to be used in the assembly line and avoids quality claims or subsequent line rework.

Master thesis

Manufactura Trazabilidad Millipore Manufacturing Traceability INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS OTRAS ESPECIALIDADES TECNOLÓGICAS OTRAS OTRAS

Author Correction: genome-wide association analyses of agronomic traits and Striga hermonthica resistance in pearl millet

Hussein Shimelis Chris Ojiewo Abhishek Rathore (2023)

Article

Agronomic Traits CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA GENOME-WIDE ASSOCIATION STUDIES STRIGA HERMONTHICA PEARL MILLET

Genome-wide association analyses of agronomic traits and Striga hermonthica resistance in pearl millet

Hussein Shimelis Chris Ojiewo Abhishek Rathore (2023)

Pearl millet (Pennisetum glaucum [L.] R. Br.) is a nutrient-dense, relatively drought-tolerant cereal crop cultivated in dry regions worldwide. The crop is under-researched, and its grain yield is low (< 0.8 tons ha−1) and stagnant in the major production regions, including Burkina Faso. The low productivity of pearl millet is mainly attributable to a lack of improved varieties, Striga hermonthica [Sh] infestation, downy mildew infection, and recurrent heat and drought stress. Developing high-yielding and Striga-resistant pearl millet varieties that satisfy the farmers’ and market needs requires the identification of yield-promoting genes linked to economic traits to facilitate marker-assisted selection and gene pyramiding. The objective of this study was to undertake genome-wide association analyses of agronomic traits and Sh resistance among 150 pearl millet genotypes to identify genetic markers for marker-assisted breeding and trait introgression. The pearl millet genotypes were phenotyped in Sh hotspot fields and screen house conditions. Twenty-nine million single nucleotide polymorphisms (SNPs) initially generated from 345 pearl millet genotypes were filtered, and 256 K SNPs were selected and used in the present study. Phenotypic data were collected on days to flowering, plant height, number of tillers, panicle length, panicle weight, thousand-grain weight, grain weight, number of emerged Striga and area under the Striga number progress curve (ASNPC). Agronomic and Sh parameters were subjected to combined analysis of variance, while genome-wide association analysis was performed on phenotypic and SNPs data. Significant differences (P < 0.001) were detected among the assessed pearl millet genotypes for Sh parameters and agronomic traits. Further, there were significant genotype by Sh interaction for the number of Sh and ASNPC. Twenty-eight SNPs were significantly associated with a low number of emerged Sh located on chromosomes 1, 2, 3, 4, 6, and 7. Four SNPs were associated with days-to-50%-flowering on chromosomes 3, 5, 6, and 7, while five were associated with panicle length on chromosomes 2, 3, and 4. Seven SNPs were linked to thousand-grain weight on chromosomes 2, 3, and 6. The putative SNP markers associated with a low number of emerged Sh and agronomic traits in the assessed genotypes are valuable genomic resources for accelerated breeding and variety deployment of pearl millet with Sh resistance and farmer- and market-preferred agronomic traits.

Article

High-Yielding Varieties Striga-Resistant Agronomic Parameters CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA GENOME-WIDE ASSOCIATION STUDIES STRIGA HERMONTHICA PEARL MILLET

Editorial: Sorghum and pearl millet as climate resilient crops for food and nutrition security

Palak Chaturvedi Mahalingam Govindaraj Govindan Velu Wolfram Weckwerth (2022)

Article

Climate Smart Crops Foxtail Millet CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA BREEDING FINGER MILLET FOOD SECURITY SETARIA ITALICA GENETIC RESOURCES PEARL MILLET SORGHUM