Bronzino, Portrait of a Young Man, Possibly Pierino da Vinci

IJRAME PUBLICATIONS, 2024

The Copper Alloy-Zeng is an alloy of copper and zinc in proportions that can be varied to achieve various mechanical and electrical properties. In a mechanical system, the gears are an important component used to increase or decrease torque, change the direction of motion and transmit power from a motion system. The easy alternative for carrying out calculations and comparing them with real conditions is simulation analysis. The stress analysis uses the finite element method with Solidworks 2021 software to save time and costs. The aim of this research is to analyze Von Misses stress using the finite element method with Solidworks 2021 software on helical gears made from copper alloy type Copper Alloy C84400 to obtain the Von Misses value where the Von Misses value can predict material failure. The result of this research was the Von Misses Stress values in this study are based on different forces, namely 10 N, 20 N, 30 N, 40 N, and 50 N, which have Von Misses Stress values of 0.085 MPa, 0.171 MPa, 0.256 MPa, 0.341 MPa and 0.427 MPa. Because the Von Misses Stress value that occurs is below the yield strength value of 105 MPa, this helical gear only experiences elastic deformation. The results of the analysis of the helical gear at forces of 10 N, 20 N, 30 N, 40 N, and 50 N showed safety factor values of 1230, 615, 410, 308, and 246, indicating that the strength of the material > the stress that occurs. Therefore it can be said that this helical gear is not safe to use.

Desde hace varios años, algunas universidades han empezado a alinear su oferta académica al esquema de educación por competencias. La razón de ello es el de disminuir la brecha que separa a las instituciones de educación superior del mercado laboral. En ese sentido, el objetivo de este artículo es analizar la percepción que los egresados de las licenciaturas en Mercadotecnia y Ciencias de la Comunicación del Tecnológico de Monterrey, Campus Puebla, tienen acerca de las competencias recibidas durante su carrera, y su aplicación en su vida profesional. A partir de una serie de entrevistas semiestructuradas, los resultados obtenidos muestran que los informantes reconocen que el aprendizaje no termina al graduarse, sino que es un proceso que continúa por iniciativa propia al empezar a trabajar. Asimismo, valoran más las actitudes que los conocimientos al momento de realizar sus tareas cotidianas. Por otro lado, resaltan el esquema de las prácticas profesionales como la antesala al empleo y, por tanto, recomiendan que las universidades estrechen vínculos con las empresas.

https://irjet.net/archives/V4/i3/IRJET-V4I3720.pdf

Ani is an important city that brings to light the Turkish-Islamic period with its architectural architectural artefacts as well as the handcraft artefacts unearthed during excavations. Glass artefacts have a special place among these finds. A large number of glass fragments were recovered from the excavations carried out in Ani Ruins between 2020-2023. Among these fragments, 22 qualified oil lamps were examined typologically in two groups as handled and stemmed oil lamps. The handled oil lamps, which are more numerous in number, generally do not have clear body forms, and in very few examples they were found to be bowl-type. There are two examples of oil lamps with sticks. They are generally green in colour, but yellow, turquoise and brown are also seen. Among the fragments of glass oil lamps found in the Seljuk Bazaar, Seljuk Great Bath, Seljuk Houses and Ashot West Bastion excavation areas in Ani, the works with handles were dated between the 11th and 13th centuries, taking into account their find locations and the coins and ceramic fragments found in their locations. The stemmed oil lamps, on the other hand, should be dated before the 11th century. The remains found during the excavations of the Ani Seljuk Bazaar, such as the workshop, slag from the workshop, vessel forms with production errors, and glass sticks, are clues indicating that glass production was carried out in Ani. Ani glasses are important in the history of glass art as they show that the glass workmanship that existed in Anatolia before the Turkish Islamic period continued in the Turkish Islamic period.

The rapid growth of information technology and internet awareness makes most government and organizations to migrate from manual paper-base system to electronic system of application (e-application) system.. The use of Computer as a communication device now affects virtually every aspect of our daily lives. The significance of this project work is therefore, to provide an effective and reliable Airline reservation and record keeping system that will enable Chanchangi and all airline to successfully exploit the potentials of the proposed system. It is user friendly there by allowing users with little knowledge of the computer to use by login in the website of chanchangi airline to view schedules of flight and make booking of tickets. More so, it is easy for the Database Administrator to configure or add/delete any field the company wants and also print out or know the number of passengers that want to travel so as to use the data and schedule their flight and speed up the process of reservation and boarding when the need arise. Also, the system can keep record of all customers that has made reservation.

Historia Mexicana, 2024

Versión completa en acceso libre: https://historiamexicana.colmex.mx/index.php/RHM/article/view/4794 En este artículo, mediante el análisis de un amplio conjunto de materiales provenientes de distintos medios de comunicación, impresos y audiovisuales, pretendo mostrar que los fenómenos de violencia política desarrollados en México durante los años setenta no sólo no permanecían ocultos para la población (como suele plantearse), sino que ocuparon un importante y complejo espacio como mercancías de consumo para los sectores urbanos.