The Effectiveness of Codesters in Teaching Basic Computer Science Topics

Founded in 2014, Codesters is a visual programming environment (VPE) like the popular Scratch and Alice. Its goal is to teach middle school and older student’s computer programming. Unlike its predecessors, users of Codesters drag and drop actual Python code instead of blocks and can edit the code themselves. Codesters has also developed modules that integrate coding lessons into the VPE. In this study, we consider the Codesters Python 1 module and investigate its effectiveness in teaching the basic coding concepts of variables, loops and conditionals. During Fall 2018 and Spring 2019, we ran a coding class for eighth graders at a local Milwaukee school based on this module. We gave a pre-test, three quizzes and a post-test to evaluate what the students have learned. We then analyzed the results of these evaluations and compared them to those taken by students who learned programming in a traditional CS1 class. Our results indicate that users of Codesters understood loops and conditionals as well as the students from the traditional CS1 class. We also found that the pre-test was a poor indicator of students’ performance in the coding class suggesting that Codesters is able to engage students who might not necessarily excel in a traditional classroom

La urbanización popular en la ciudad de México

La Ciudad de México es una de las metrópolis más pobladas del planeta. Razones históricas profundas vinculadas a procesos estructurales fundamentales y a decisiones de política gubernamental explican su preminencia. Asimismo, la urbanización de la ciudad de México solo puede explicarse en referencia al proceso de ocupación popular de la ciudad. La urbanización popular o las colonias populares -como comúnmente se conocen- no son un fenómeno privativo de la ciudad de México, ni siquiera de nuestras más dinámicas urbes; las principales aglomeraciones latinoamericanas, en mayor o menor medida, presentan este fenómeno. El proceso de ocupación popular de las ciudades, a pesar de su indudable importancia, ha sido poco estudiado, más aún a partir de enfoques que intenten globalizar dicho fenómeno incorporando sus determinantes económicos, sociales, urbanísticos y políticos desde una perspectiva crítica. El presente texto, que editorial Nuestro Tiempo y el Instituto de Investigaciones Económicas coeditan, desarrolla importantes aportes exploratorios en dicho sentido. La riqueza de la interpretación también reside en su fundamentación en cuantiosa información documental y en un sistemático trabajo de campo que incluye un censo levantado directamente en la zona de estudio. Las colonias populares son la realidad citadina cotidiana de millones de mexicanos, su mejor comprensión no solo se justifica por razones de conocimiento científico sino, sobre todo por la necesidad de coadyuvar a generar alternativas que busquen la transformación y superación de las condiciones de vida de estos millones de compatriotas a quienes va dirigida la preocupación central del presente libro

Morphological variability of native maize (Zea mays L.) of the west highland of Puebla and east highland of Tlaxcala, Mexico

The objective of this research was to assess the morphological variability of maize landraces native of the west highland of Puebla and east highland of Tlaxcala, México, in order to, besides define it, related it to races, commercial varieties and with the altitude of the localities of seed collection. The genetic resources evaluated were 134 accessions collected in 34 localities, along with 10 controls. Experiments were established on three localities using a Lattice 12 x 12. Thirty-two morphological traits were analyzed, 27 of them resulting with highly significant differences, reflecting the high variability at the level of morphological characters, many of them of agronomic interest. From variance analysis 16 traits were selected for use in a cluster analysis through the Modified Localization Method, which joint the populations in six groups, most of them in the group 1, with morphological traits of long cycle varieties: high plants, with greater primary branches of the tassel, greater ear diameter and length, and greater grain length and width. The conclusions indicate that the morphological variability of Landraces is not associated with the altitude of localities of seed collection and that these have more relation with Chalqueño race, small with Conico race, absent with Conico Norteño and Palomero Toluqueño races and almost absent with commercial varieties.The objective of this research was to assess the morphological variability of maize landraces native of the west highland of Puebla and east highland of Tlaxcala, México, in order to, besides define it, related it to races, commercial varieties and with the altitude of the localities of seed collection. The genetic resources evaluated were 134 accessions collected in 34 localities, along with 10 controls. Experiments were established on three localities using a Lattice 12 x 12. Thirty-two morphological traits were analyzed, 27 of them resulting with highly significant differences, reflecting the high variability at the level of morphological characters, many of them of agronomic interest. From variance analysis 16 traits were selected for use in a cluster analysis through the Modified Localization Method, which joint the populations in six groups, most of them in the group 1, with morphological traits of long cycle varieties: high plants, with greater primary branches of the tassel, greater ear diameter and length, and greater grain length and width. The conclusions indicate that the morphological variability of Landraces is not associated with the altitude of localities of seed collection and that these have more relation with Chalqueño race, small with Conico race, absent with Conico Norteño and Palomero Toluqueño races and almost absent with commercial varieties

Transancestral mapping and genetic load in systemic lupus erythematosus

Systemic lupus erythematosus (SLE) is an autoimmune disease with marked gender and ethnic disparities. We report a large transancestral association study of SLE using Immunochip genotype data from 27,574 individuals of European (EA), African (AA) and Hispanic Amerindian (HA) ancestry. We identify 58 distinct non-HLA regions in EA, 9 in AA and 16 in HA (B50% of these regions have multiple independent associations); these include 24 novel SLE regions (Po5 10 8), refined association signals in established regions, extended associations to additional ancestries, and a disentangled complex HLA multigenic effect. The risk allele count (genetic load) exhibits an accelerating pattern of SLE risk, leading us to posit a cumulative hit hypothesis for autoimmune disease. Comparing results across the three ancestries identifies both ancestry-dependent and ancestry-independent contributions to SLE risk. Our results are consistent with the unique and complex histories of the populations sampled, and collectively help clarify the genetic architecture and ethnic disparities in SL

La ganadería ante escenarios complejos.

La calidad de las contribuciones, producto de la pluma de especialistas en los temas tratados, el presente es un libro que esperamos, basándonos en la importancia de los temas tratados, sea de utilidad y abone a la reflexión de los estudiosos de la ganadería mexicana y, por supuesto, en beneficio de las familias ganaderas y de los consumidores de sus productos.este libro refleja en muchos sentidos la situación de la ganadería mexicana, a la que se le están demandando mayor producción y productividad, que los procesos productivos tengan la menor huella ecológicposible, que los alimentos sean inocuos, que se abatan costos de producción y, cada vez aumentan las presiones de diversos grupos para, que se incluyan los protocolos de bienestar animal, solamente por citar algunos de los retos que tiene. Algunas de estas demandas son complementarias, otras se contraponen, lo que hace valiosos a los estudios que desde las ciencias sociales se realizan y, desde diversas ópticas, se hagan propuestas de política pública balanceadas que consideren lo mejor de cada enfoque, pero sin desechar por completo los antagónicos.Universidad Autónoma Chaping

ANÁLISIS INTEGRAL DEL COSTO-BENEFICIO EN LA CONSTRUCCIÓN CON LADRILLO APARENTE EN EL VALLE DE COLIMA

Facultad de Arquitectura y Diseñ

El sistema préstamo reembolso para transporte vehicular en Pemex, una opción viable para mejorar estados financieros en el Activo de Producción Veracruz

Tesis de Maestría en Administración presentada al Instituto de Investigaciones y Estudios Superiores de las Ciencias Administrativas de la Universidad Veracruzana, Región Xalapa

Collaborative planning for solid waste management : the case of the Western Sierra Nevada, Mexico

EThOS - Electronic Theses Online ServiceGBUnited Kingdo