Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Analyzing samples with unbalanced data is a challenge for those who should use them in terms of modeling. A context in which this happens is when the response variable is binary and one of its classes is very small in proportion to the total. For the modeling of binary variables, probability models such as logit or probit are usually used. However, these models present problems when the sample is not balanced and it is desired to elaborate the confusion matrix from which the predictive power of the model is evaluated. One technique that allows the observed data to be balanced is the SMOTE algorithm, which works with numerical data exclusively. This work is an extension of SMOTE such that it allows the use of mixed data (numerical and categorical). By using mixed data, this proposal also makes it possible to overcome the barrier of 65536 observations that the R software has when working with categorical data distances. Through a simulation study, it is possible to verify the benefits of the proposed algorithm: SMOTEMD for mixed data.

El creciente desarrollo del Internet de las Cosas (IoT, Internet of Things) ha diversificado sus campos de aplicación, mejorando no solo la interconexión de personas, sino también, la comunicación entre maquinaria industrial (M2M, Machine-to-Machine), en las que sus características en alcance, escalabilidad y bajo costo de despliegue, pueden ser aprovechadas. Las tecnologías LoRa y LoRaWAN se muestran como una de las principales opciones de comunicación inalámbrica de bajo costo en la integración de sistemas industriales con mira a los nuevos requerimientos de la Industria 4.0. En este trabajo se realizó una campaña de mediciones y el análisis de los datos obtenidos, para evaluar el comportamiento y la aplicabilidad de las tecnologías LoRa y LoRaWAN dentro de ambientes industriales. Para contrastar los resultados, se realizaron pruebas en ambientes urbanos despejados, donde se observó que las condiciones dentro de las naves industriales, permiten establecer un enlace con condiciones de radio frecuencia favorables. Inicialmente se han considerado escenarios de corto alcance (<100 m) en los que se mantiene una línea de vista entre el transmisor y el receptor.

El programa del agua y el suelo (PROMAS) de la Universidad de Cuenca contribuye al manejo sostenible de los recursos agua y suelo. Para llevar a cabo este cometido, el PROMAS requiere, entre otros, monitorear parámetros ambientales utilizando estaciones meteorológicas. En el presente trabajo se desarrolló un registrador de datos pluviométricos en un PCB compacto utilizando componentes de montaje superficial. Para transmitir la información se usa la tecnología LoRaWAN/LoRa. LoRa es una de las tecnologías de redes de largo alcance y bajo consumo LPWAN. LoRaWAN es un protocolo que gestiona la comunicación de extremo a extremo. Este desarrollo integra la adquisición, el almacenamiento y la transmisión de los datos. La arquitectura está integrada por nodos sensores distribuidos en toda el área de interés, un dispositivo gateway y el servidor de red. El registrador de datos tiene como función adicional la descarga de datos in-situ usando tecnología WiFi, para esto se utiliza un gateway. Las pruebas realizadas mostraron que el prototipo desarrollado funcionó correctamente en la adquisición, transmisión y almacenamiento de datos.

Mobile devices have become part of daily social life. However, the vulnerabilities of this equipment are widespread, affecting information or damaging the system internally. Within this problem, this research proposes the implementation of a virus that allows affecting the Android victim device focusing on finding the vulnerabilities through penetration tests. The virus was designed through the principle of thread programming to a generation of scripts. Furthermore, the attack on Android devices’ vulnerable systems is conducted, applying social engineering techniques. Thus, through imperative programming techniques and functional, the access and use have been achieved, given that the virus had classes that allow connection and communication with the device. Each class was developed together so that in this way, there is a precise relationship between them. In this study, Kali Linux, with different Metasploit commands, was used.  The proofs of concept were conducted using controlled virtual network environments. For this, a server and a platform were used to use the IP and the Ngrok host, which allows us to generate       a link with the application that will violate Android’s services and security over secure tunnels. The results show that the operating system tends to be prone to internal damage. At the same time, users can be affected when their security and privacy are compromised. The proposal contributes significantly to a new version of Android’s security patches, implementing   a malware model that will integrate techniques to mitigate this problem in the future.

Software-defined Networking (SDN) constitutes a new era in the development of internetworking. The SDN paradigm splits the data plane from the control plane. It uses controller equipment, which is responsible for centrally managing several network devices simultaneously. This study analyzes three open-source controllers for SDN based on the OpenFlow protocol. Specifically, the performance of FloodLight, OpenDayLight (ODL), and Ryu controllers is evaluated in terms of latency, throughput, and scalability. In doing so, the Cbench tool is used in an emulated environment with Mininet. The results show that the Ryu controller presents the lowest performance in all the evaluated parameters; ODL provides lower latency and FloodLight higher throughput. Regarding scalability, we conclude that Floodlight can be used in small networks, whereas ODL can be used in dense networks. Furthermore, we evaluate their main characteristics, which must be considered for their choice prior to implementation and deployment.

Summary of the book The thought of Camilo José Cela. From its genesis to its maturity by José Domingo Vilaplana Guerrero

Reseñas de  diversas publicaciones realizadas por la Universidad Ricardo Palma

When conducting a legal analysis of the Tradition Al pie de la letra, a political and legal environment is revealed in the first decade of the Republican life, where the president of the Republic is a military member that seizes control of the government through armed violence, and it also revealed a decade where constitutional rights were not respected. It is in this context that a situation of theoretical validity for the Political Constitution of 1834 arises, as well as the non-application of constitutional rights, affecting people’s social lives.Keywords: Military, discipline, obedience, orders, constitution, constitutional rights

It is well known that during the last years of the 19th century, Ricardo Palma was the victim of harsh and continuous attacks coming from Manuel González Prada and his followers, members of the Círculo Literario. For more than a century, literature researchers of those years have rehearsed multiple interpretations to explain the reasons that inspired writers and journalists, preferably young ones, to attack the author of Peruvian Traditions with such fury. The present article proposes to discuss the issue from a generational perspective, which is not surprising, but it insists that the censurable level the insults reached was due to the presence of the political journalist and satirist Luis Enrique Márquez in Revista Social and Círculo Literario, who a dozen years earlier had fiercely attacked Palma in defense of the government of President Manuel Pardo.

En el presente artículo se pasa revista al itinerario vital y al significado de su seudónimo, así como su labor periodística en El Murciélago y El Peruano del escritor peruano. Luego se destaca la modernidad encontrada a partir de su viaje a París; se estudia sus principales libros y la cercanía con Palma a través del periódico La Broma. Finalmente, se destaca el aporte de Atanasio Fuentes en la literatura peruana. Palabras clave: Murciélago, criollista, polígrafo, Lima, modernidad, Palma.