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Després d'introduir Yocto i SWUpdate, aquest projecte mostra com es construeix un sistema operatiu Linux encastat complet per a un dispositiu amb pantalla. Primerament, es dissenya i implementa l'entorn de desenvolupament des de la perspectiva del desenvolupador, i, en segon lloc, es tria i es prova un procés robust per a les actualitzacions de programari. Finalment, es desenvolupa una aplicació gràfica com a demostració del procés d'actualització des de la perspectiva de l'usuari final., After introducing Yocto and SWUpdate, this project shows how a complete Embedded Linux Operating system is built for a screen-enabled device. Firstly, the development environment and build system is designed and implemented from a developer's perspective, and secondly, a robust process for software updates is chosen and tested. Finally, a graphical application is developed as a demonstration of the update process from an end user's perspective.

De novo protein design has reached a new height in recent years thanks to new computational procedures, such as AlphaFold2, an artificial intelligence (AI) that predicts the three-dimensional structure of proteins from an amino acid sequence. This method allows for the design of proteins with high structural precision and complexity, capable of performing functions of medical and biotechnological relevance. This work aims to explore how the latest artificial intelligence methods, specifically AlphaFold2, can improve the prediction of protein tertiary structures and determine which proteins are more likely to successfully bind to therapeutic targets of interest, such as the RBD domain of SARS-CoV-2. Additionally, it aims to optimize current computational methodologies. Specifically, the prediction of structures of protein-protein complexes and ligand complexes competing for the same receptor has been carried out, analyzing various parameters regarding the quality of the prediction and the physicochemical properties of the proteins. This approach aims to optimize the computational methodology and develop a ranking of the affinities of proteins that could bind to the RBD receptor. The proteins studied have been designed both by other laboratories in previously published studies and by the Protein Design and Modeling group at the Institute of Molecular Biology of Barcelona (IBMB), for which experimental data are available. This provides an ideal framework for working on the optimization of computational methodologies., El disseny computacional de proteïnes de novo ha experimentat un creixement en els últims anys gracies a nous procediments computacionals, com AlphaFold2, una intel·ligència artificial (IA) que prediu l'estructura tridimensional de proteïnes a partir d'una seqüencia d'aminoàcids. Aquest mètode permet el disseny de proteïnes amb alta precisió estructural i complexitat, capaces de desenvolupar funcions de rellevància mèdica i biotecnològica. Aquest treball té com a objectiu explorar com els mètodes més recents d'intel·ligència artificial, concretament AlphaFold2, poden millorar la predicció de l'estructura terciària de proteïnes i determinar quines tenen més probabilitat d'unir-se exitosament a dianes terapèutiques d'interès, com el domini RBD de SARS-CoV-2. A més, es pretén optimitzar les metodologies computacionals actuals. Específicament, s'ha realitzat la predicció d'estructures de complexos proteïna-proteïna i de complexos de lligands competint pel mateix receptor, analitzant diversos paràmetres sobre la qualitat de la predicció i propietats fisicoquímiques de les proteïnes. Aquest enfocament busca optimitzar la metodologia computacional i desenvolupar un rànquing d'afinitat de les proteïnes que podrien unir-se al receptor RBD. Les proteïnes estudiantes han estat dissenyades tant per altres laboratoris en estudis prèviament publicats com pel grup Protein Design and Modeling de l'Institut de Biologia Molecular de Barcelona (IBMB), per a les quals hi ha dades experimentals disponibles. Això proporciona un marc ideal per treballar en l'optimització de les metodologies computacionals., El diseño computacional de proteínas de novo ha experimentado un auge en los últimos años gracias a nuevos procedimientos computacionales, como AlphaFold2, una inteligencia artificial (IA) que predice la estructura tridimensional de proteínas a partir de una secuencia de aminoácidos. Este método permite el diseño de proteínas con alta precisión estructural y complejidad, capaces de desempeñar funciones de relevancia médica y biotecnológica. Este trabajo tiene como objetivo explorar como los métodos más recientes de inteligencia artificial, concretamente AlphaFold2, pueden mejorar la predicción de la estructura terciaria de proteínas y determinar cuales tienen mayor probabilidad de unirse exitosamente a dianas terapéuticas d interés, como el dominio RBD de SARS-CoV-2. Además, se pretende optimizar las metodologías computacionales actuales. Específicamente, se ha realizado la predicción de estructuras de complejos proteína-proteína y de complejos de ligandos compitiendo por el mismo receptor, analizando diversos parámetros sobre la calidad de la predicción y propiedades fisicoquímicas de las proteínas. Este enfoque busca optimizar la metodología computacional y desarrollar un ranking de afinidades de las proteínas que podrían unirse al receptor RBD. Las proteínas estudiadas han sido diseñadas por otros laboratorios en estudios previamente publicados como el grupo Protein Design and Modeling del Instituto de Biología Molecular de Barcelona (IBMB), para las cuales hay datos experimentales disponibles. Esto proporciona un marco ideal para trabajar en la optimización de las metodologías computacionales., Objectius de Desenvolupament Sostenible::3 - Salut i Benestar

En este proyecto se ha intentado abordar la problemática que puede presentar un equipo de IT para monitorizar y gestionar servidores Linux Ubuntu, tanto físicos como virtuales, en un entorno de área local. La solución propuesta es una aplicación web desarrollada con Flask, que se integra con las tecnologías existentes para ofrecer una interfaz centralizada y accesible para un equipo de IT. Esta interfaz permite no solo monitorizar el estado de los servidores, sino también gestionar aspectos más específicos como los servicios, el almacenamiento, las configuraciones de red de manera remota, y otras características bastante manipuladas en el ámbito IT. El objetivo del proyecto es simplificar las operaciones de IT, mejorando la capacidad de respuesta ante incidencias y ofreciendo una visión general y actualizada del estado de los sistemas. Este proyecto permite tener una metodología de desarrollo interactivo y modular, implementando funciones de gestión una por una, en orden de relevancia en cuanto a monitorización. Esto ha proporcionado mucha flexibilidad al proyecto, ya que cada componente agregado es prácticamente independiente de otro. Este documento detalla cada paso del proceso de desarrollo, justificando las decisiones técnicas tomadas y describiendo las distintas plataformas y librerías utilizadas. También se evalúan otras herramientas de monitorización y gestión de servidores disponibles y se explica la elección de las implementadas.

Laboratory exercises are an important part of the teaching process at many faculties. However, despite the fact that today the implementation of laboratory exercises is carried out on modern equipment, the full potential of that equipment is often not used, that is, often some of the possibilities of modern equipment are not fully used in student practice. In the paper, it will be shown on two cases from practice how the student user experience can be expanded by using exactly those "forgotten" options. In the first case, a solution based on the full use of Standard Commands for Programmable Instruments (SCPI), which are implemented on most modern measuring devices, will be presented. The second case will consider the application of open source hardware and software supported by LoRa connectivity, which enables the expansion of the spectrum of exercises performed by students. It will be shown that both solutions can be implemented without a high level of complexity and large financial efforts for the higher education institution itself.

Today, modern teaching relies heavily on the use of different software solutions, and modern teaching processes partly require the application of home learning concepts, which imply the application of those software solutions on personal student computer resources. By trying to provide software environments identical to those within higher education institutions, certain problems were identified that should be overcome in order to ensure the quality of the teaching process. The paper presents a possible solution based on the features provided by free and open source software (FOSS) and which enables easy and practical implementation of a uniform software environment for each student, regardless of the personal computer environment that is currently in use.

Detta projekt undersöker möjligheten att använda Mininet som ett verktyg för att simulering av nätverk, SDN och nätverksadministration av Linux-värdar. Syftet är att undersöka möjligheten att utveckla några introduktionslaborationer som kan introducera en målgrupp i ämnet samt att utveckla förslagslaborationer med inkluderande instuderingsmaterial. Projektet undersöker vilka tekniska krav som finns för att skapa den laborationsmiljö som ska uppnå de önskemål som uppdragsgivaren angett. Laborationsmiljön konstrueras för Ubuntu Linux med virtualiseringsprogramvaran VirtualBox och inkluderar verktyg för att arbeta utifrån en Microsoft Windows-miljö såsom SSH med X11 och Windows X server. Linuxmiljön består av Ubuntu Server med verktygen Mininet och de medföljande verktygen i Mininets Ubuntudistribution såsom Wireshark, OpenFlow, OpenvSwitch och POX. Projektet identifierar de möjligheter som finns för att simulera olika topologier i Mininet, med inbyggda funktioner och Pythonprogram, samt nätverksanalys med verktyg som Wireshark och tcpdump. Tänkta möjligheter såsom Netplankonfigurationer gick ej att genomföra. Projektet presenterar möjligheter och begränsningar som kan uppstå i användandet av Mininet som huvudverktyg, This project explores the possibility of using Mininet as a tool for simulating networks, SDN, and network administration of Linux hosts. The purpose is to investigate the possibility of developing introductory lab exercises that can introduce a target audience to the subject, as well as to create proposed labs with inclusive study materials. The project examines the technical requirements needed to create a lab environment that meets the client’s specified needs. The lab environment is constructed for Ubuntu Linux using the virtualization software VirtualBox and includes tools for working from a Microsoft Windows environment, such as SSH with X11 and Windows X server. The Linux environment consists of Ubuntu Server with Mininet and the accompanying tools in Mininet’s Ubuntu distribution, such as Wireshark, OpenFlow, OpenvSwitch, and POX. The project identifies the possibilities of simulating various topologies in Mininet using built-in functions and Python scripts, as well as network analysis with tools like Wireshark and tcpdump. Intended possibilities such as configuring with Netplan could not be realized. The project presents the possibilities and limitations that can arise when using Mininet as the main tool

The Internet has shifted towards video-based content, resulting in higher network traffic volumes than ever before. Efficient solutions are crucial to processing this traffic swiftly. Various techniques have been developed to efficiently transport network packets from a network interface to the program processing the packets. The two most prominent tools are the Data Plane Development Kit (DPDK) and the Address Family eXpress Data Path (AF_XDP), each employing different approaches to tackle the issue. DPDK utilizes kernel bypass, detaching the network interface from the operating system (OS) to assume full control over it. On the other hand, AF_XDP employs in-kernel processing, leveraging a specialized data path in the Linux operating system to bypass the entire network stack while keeping the interface accessible within the OS. Both frameworks support the creation of packets from multiple separate memory buffers. DPDK has supported it for a long time, while AF_XDP introduced it just before the start of the theses. DPDK terms this feature “indirect mbufs”, while AF_XDP refers to it as “multi-buffers”. This capability allows advanced packet operations to be executed without data copying, which is essential for specific workloads, as data copying often significantly degrades performance. With both techniques implementing this feature, the question arises: which one offers superior performance? Measuring the performance of high-performance packet processors is challenging. Since the device undergoing testing operates at full load, measurements must be taken on an external node. Similarly, developing highly performance-critical applications is challenging, as a single oversight can severely impact performance. This problem was addressed by creating two applications that tested ten different “elemental” workloads in DPDK and AF_XPD. Subsequently, these applications were tested using the traffic generator TRex, and metrics such as throughput, latency, and packet delay var, Internet har skiftat mot videobaserat innehåll, vilket resulterat i högre nätverkstrafikvolymer än någonsin tidigare. Effektiva lösningar är avgörande för att hantera all denna trafik. Olika tekniker har utvecklats för att effektivt transportera nätverkspaket från ett nätverksgränssnitt till programmet som behandlar paketen. De två mest framträdande verktygen är Data Plane Development Kit (DPDK) och adressfamiljen eXpress Data Path (AF_XDP), som var och en använder olika metoder för att lösa problemet. DPDK använder ”kernel bypass”, som kopplar bort nätverksgränssnittet från operativsystemet (OS) för att ta full kontroll över det. AF_XDP använder istället bearbetning ”in-kernel” och utnyttjar en specialiserad dataväg i operativsystemet Linux för att kringgå hela nätverksstacken samtidigt som gränssnittet är tillgängligt inom operativsystemet. Båda teknikerna stöder skapandet av paket från flera separata minnesbuffertar. DPDK har stött det under lång tid, medan AF_XDP introducerade det precis innan avhandlingarnas början. DPDK kallar den här funktionen för ”indirekta mbufs”, medan AF_XDP hänvisar till den som ”multibuffertar”. Denna funktion tillåter avancerade paketoperationer att utföras utan datakopiering, vilket är nödvändigt för specifika arbetsbelastningar, som datakopiering försämrar ofta prestandan avsevärt. När båda teknikerna implementerar denna funktion uppstår frågan: vilken ger den bäst prestanda? Att mäta prestanda hos högpresterande paketprocessorer är utmanande. Eftersom enheten som testas fungerar med full belastning måste mätningar göras på en extern nod. På samma sätt är det utmanande att utveckla mycket prestandakritiska applikationer, eftersom ett enda misstag kan allvarligt påverka prestandan. Detta problem åtgärdades genom att skapa två applikationer som testade tio olika ”elementära” arbetsbördor i DPDK och AF_XPD. Därefter testades dessa applikationer med trafikgeneratorn TRex, och mätvärden av genomströmning, latens och paketfördröjningsvari

La tendència a generar contingut audiovisual en format vertical és una de les diverses causes per la qual la gent es planteja tenir una pantalla d'ordinador en aquesta nova orientació. Una de les solucions més senzilles i econòmiques és adquirir un suport de monitor que permeti rotar la pantalla sense haver-la de desmuntar, i així disposar fàcilment de les dues orientacions. Un inconvenient d'aquest sistema és que, quan es gira la pantalla, s'ha de reconfigurar l'entorn gràfic per adaptar-lo a la nova orientació. Existeixen alguns monitors d'alta gamma que, mitjançant la connexió d'imatge ja existent, poden notificar a l'ordinador els canvis d'orientació. Tanmateix, aquests sistemes només funcionen correctament si s'utilitza el suport de pantalla i protocols recomanats. Aquest projecte proposa un dispositiu de baix cost que, mitjançant un sensor d'acceleració i una connexió USB, detecta l'orientació de la pantalla i configura l'entorn gràfic adequadament. S'ha posat èmfasi en l'ús de protocols estàndards existents, la compatibilitat entre diferents sistemes operatius i la facilitat d'instal·lació i ús dels programes relacionats amb el dispositiu., La tendencia a generar contenido audiovisual en formato vertical es una de las diversas razones por las que la gente se plantea tener una pantalla de ordenador en esta nueva orientación. Una de las soluciones más sencillas y económicas es adquirir un soporte de monitor que permita rotar la pantalla sin tener que desmontarla, y así disponer fácilmente de ambas orientaciones. Un inconveniente de este sistema es que, cuando se gira la pantalla, se debe reconfigurar el entorno gráfico para adaptarlo a la nueva orientación. Existen algunos monitores de alta gama que, mediante la conexión de imagen ya existente, pueden notificar al ordenador los cambios de orientación. Sin embargo, estos sistemas solo funcionan correctamente si se utiliza el soporte de pantalla y los protocolos recomendados. Este proyecto propone un dispositivo económico que, mediante un sensor de aceleración y una conexión USB, detecta la orientación de la pantalla y configura el entorno gráfico adecuadamente. Se ha puesto énfasis en el uso de protocolos estándar existentes, la compatibilidad entre diferentes sistemas operativos y la facilidad de instalación y uso de los programas relacionados con el dispositivo., The trend towards generating audiovisual content in vertical format is one of the various reasons why people consider having a computer screen in this new orientation. One of the simplest and most economical solutions is to acquire a monitor stand that allows the screen to be rotated without having to disassemble it, thus easily providing both orientations. One drawback of this system is that when the screen is rotated, the graphic environment needs to be reconfigured to adapt to the new orientation. There are some high-end monitors that, through the existing image connection, can notify the computer of orientation changes. However, these systems only work properly if the recommended screen support and protocols are used. This project proposes a low-cost device that, using an accelerometer sensor and a USB connection, detects the screen orientation and configures the graphic environment accordingly. Emphasis has been placed on the use of existing standard protocols, compatibility between different operating systems, and the ease of installation and use of device-related programs.

SIMONE és una eina desenvolupada per a realitzar gravacions de senyals CAN en qualsevol vehicle o representar valors d'aquestes mateixes, siguin de tipus CAN estàndard o CAN FD en activitats tan comunes com el benchmarking o assajos en els quals es requereixi monitorar o representar informació interna del vehicle, en el món de l'automoció. El seu valor econòmic és un terç en comparació amb la resta dels dispositius similars. El desenvolupament s'ha realitzat sobre la Raspberry Pi utilitzant com a llenguatge de programació Python dins del sistema operatiu Linux en la distribució Raspbian, que ens permet interactuar amb llibreries CAN desenvolupades en Python i Linux amb facilitat i eficiència, reduint els temps de programació i augmentant la versatilitat d'aquesta eina. En aquest document coneixerem com ha estat el desenvolupament d'aquest projecte de JATCO dins del departament d'R+D., SIMONE es una herramienta desarrollada para realizar grabaciones de señales CAN en cualquier vehículo o representar valores de estas mismas, ya sean de tipo CAN estándar o CAN FD en actividades tan comunes como el benchmarking o ensayos en los que se requiera monitorear o representar información interna del vehículo, en el mundo de la automoción. Su valor económico es un tercio en comparación con el resto de los dispositivos similares. El desarrollo se ha realizado sobre la Raspberry Pi 3b/4/5 utilizando como lenguaje de programación Python en el sistema operativo Linux en la distribución Raspbian, que nos permite interactuar con librerías CAN desarrolladas en Python y Linux con facilidad y eficiencia, reduciendo los tiempos de programación i augmentando la versatilidad de esta herramienta. En este documento conoceremos como ha sido el desarrollo de este proyecto de JATCO dentro del departamento de I+D., SIMONE is a tool designed to record or display the values of CAN signals in any vehicle, either standard CAN or CAN FD. It is used in a variety of automotive contexts, including benchmarking and testing, where monitoring or representation of internal vehicle information is required. Its economic value is one third that of other similar devices. Development has been carried out on Raspberry Pi 3b/4/5 using Python as the programming language within the Linux operating system in the Raspbian distribution. This allows seamless interaction with the CAN libraries developed in Python and Linux, reducing the time and effort required for programming while increasing the versatility of the tool. This document presents the development of the JATCO project within the R&D department.

Este trabajo final de grado, titulado diseño e implementación de una infraestructura IT empresarial moderna para pruebas, tiene como objetivo replicar fidedignamente, en un laboratorio, el stack IT usado a nivel empresarial en data centers modernos, desde la capa física hasta la orquestación con kubernetes, pasando por la hipervisón y la creación y gestión de máquinas virtuales. El proyecto se desarrolla en la Universidad Politécnica de Cataluña (UPC), más concretamente en la Facultad de Informática de Barcelona (FIB). El autor realiza el proyecto en la empresa NTT Data, específicamente dentro del equipo de Infrastructure Services en Barcelona., This final degree project, entitled design and implementation of a modern enterprise IT infrastructure for testing, aims to faithfully replicate, in a laboratory, the IT stack used at enterprise level in modern data centres, from the physical layer to orchestration with Kubernetes, including hypervison and the creation and management of virtual machines. The project is carried out at the Polytechnic University of Catalonia (UPC), more specifically at the Faculty of Informatics of Barcelona (FIB). The author is working on the project at NTT Data, specifically within the Infrastructure Services team in Barcelona.

Linux som operativsystem används mer och har blivit vanligare i samband med inbyggda system vilket har lett till att företag som Percepio ställer frågor om hur datakollektion vid processkrascher genomförs i Linux-baserade inbyggda system. Detta med anledning för att öka observerbarhet i system via externa medel och tillåta fjärrfelsökning via en molnbaserad informationspanel. Syftet med det här arbetet är att undersöka vad det finns för befintliga tillvägagångssätt kring datainsamling vid signalavbrott. Vårt arbete har som mål att implementera en prototyp av Percepios övervakningsverktyg DevAlert på ett Linux-baserat inbyggt system. I den här rapporten kommer vi att undersöka hur praxisen ser ut för felsökning och felhantering i den här typen av system. För att uppfylla syfte och mål med vårt arbete har vi samlat information i en litteraturstudie om vad som är relevant för att öka observerbarheten i liknande system som har felande processer. Detta följdes av iterativa experiment där den insamlade informationen från litteraturstudien bekräftats och implementerats i vår prototyp. Den slutliga iterationen utfördes på en virtuell maskin vilket resulterade i en lyckad prototypimplementation av DevAlert i Linux. Resultaten som vi presenterar anser vi ska kunna appliceras i ett inbyggt Linux-system eftersom ramverken som vi samlar information ifrån använder en Linux-kärna., The Linux operating systems is used more frequently and have become more common in connection with embedded systems, which has led to companies such as Percepio to pose questions about how data collection in case of process crashes is carried out in Linux based embedded systems. This is to increase observability in systems via external means and allow remote troubleshooting via a cloud-based dashboard. The purpose of this work is to investigate what the existing approaches regarding data collection in case of signal interruption are. Our work aims to implement a prototype of Percepio's monitoring tool DevAlert on a Linux-based embedded system. In this report, we will examine what the best practices are for troubleshooting and error handling in this type of system. In order to fulfill the purpose and goals of our work, we have gathered information in a literature study about what is relevant to increase observability in similar systems that have faulty processes. This was followed by iterative experiments where the collected information from the literature study was confirmed and implemented in our prototype. The final iteration was performed on a virtual machine resulting in a successful prototype implementation of DevAlert in Linux. We believe that the results we present should be applicable in an embedded Linux system because the frameworks from which we gather information use a Linux kernel.

In TSN networks, proper end-station configuration is essential to ensure the timely and reliable delivery of time-sensitive data, meeting strict end-To-end Quality of Service (QoS) criteria. However, the complexity of the configuration process requires a significant manual effort, which makes real-Time application development on standard Operating Systems such as Linux a challenge. In this paper, we propose a sim-ple yet functional approach to automate the configuration of Linux-based TSN end-stations within TSN networks by adding a TSN layer on top of the networking system services and defining a configuration protocol tailored for the centralized network/distributed user configuration mode. Evaluation results demonstrate minimal overhead during stream addition, achieving hundreds-of-millisecond-Ievel configuration times and enabling a hassle-free Plug-And-Play mode of operation.

Signal predistortion occurs in modern communication systems and in other systems requiring linear signal amplification. The objective is to learn about signal predistortion, the QORVO 1800 MHz FDD radio front-end and to implement the front-end control using RFSoC and Matlab computer program. I focus on controlling individual attenuators and amplifiers on the QORVO front-end with a program written in C. Using a single board computer Raspberry Pi 4B running Linux. Furthermore, the work involves the application of a SCPI server that operates based on TCP packets. As part of the introduction to the front-end, the power characteristic of the power amplifier is measured.

In the continuously evolving field of malware investigation, a Trojan horse, which appears as innocent software from the user's perspective, represents a significant threat and challenge for antivirus solutions because of their deceptive nature and the various malicious functionalities they provide. This study will compare the effectiveness of three free antiviruses for Linux systems (DrWeb, ClamAV, ESET NOD32) against a dataset of 1919 Trojan malware samples. The evaluation will assess their detection capabilities, resource usage, and the core functionalities they offer. The results revealed a trade-off between these three aspects: DrWeb achieved the highest detection rate (93.43%) but consumed the most resources and provided the most comprehensive functionalities. While ClamAV balanced detection and resource usage with less functionality, ESET NOD32 prioritised low resource usage but showcased a lower detection rate than the other engines (80.93%). Interestingly, the results showed that the category of Trojan horse malware and the file format analysed can affect the detection capabilities of the evaluated antiviruses. This suggests that there is no “silver bullet” for Linux systems against Trojans, and further research in this area is needed to assess the detection capabilities of antivirus engines thoroughly and propose advanced detection methods for robust protection against Trojans on Linux systems.

Modern internet users expect seamless, uninterrupted communication when using real-time applications, even when sharing the network connection with devices that produce heavy traffic. This trend has pushed the demand for more sophisticated packet schedulers on routers. However, given the limited resources on these routers, it is increasingly important to reduce the overhead associated with these schedulers. This paper presents XDP Queuing (XDQ), our ongoing work on achieving faster packet scheduling on the Linux operating system, which is popular on networking equipment. Linux provides eXpress Data Path (XDP), a high-performance programmable network data path using the eBPF framework, which allows code to process packets early from the driver. While XDP has found numerous uses in the industry, such as Denial-of-Service attack mitigation, load-balancers, and intrusion prevention systems, it currently has no mechanism for queueing or reordering packets and cannot implement traffic scheduling policies. Our contribution, XDQ, is a programmable packet scheduling extension for the XDP framework. XDQ uses recently proposed schemes for programmable queues. It allows writing packet schedulers using eBPF while benefiting from the XDP fast data path.

Service-Dominant Logic (SDL) in marketing challenges conventional definitions of goods and services by redefining service as the application of specialized competencies and resources for the benefit of others. It emphasizes that all firms essentially act as service providers using goods as a means to deliver services. SDL shifts the perspective towards viewing customers as active participants in the value creation process, rather than mere recipients of goods and services. The concept of co-creation takes center stage within the realm of SDL, underlining the significance of involving customers in the co-design and delivery of personalized services. This study delves into co-creation, with a specific focus on two pivotal variables: co-creation participation and co-creation experience. The first segment investigates the antecedents and moderators of co-creation, including influential factors such as the sense of community, platform identification, and innovativeness, which drive active participation. The second part scrutinizes the outcomes of co-creation, shedding light on the economic and relational benefits, alongside indirect effects like satisfaction and its impact on future engagement and advocacy. The study's data collection involved conducting an online survey distributed through open-source community platforms dedicated to the development of the Linux operating system, resulting in a commendable response rate of 41.10%. The research accentuates the advantages of co-creation, encompassing both direct and indirect benefits. Directly, it creates economic and relational value by fostering participants' sense of connection and ownership, which in turn generates emotional and economic value, nurtures trust, and cultivates loyalty. Additionally, it underscores the pivotal role of satisfaction in shaping perceptions of product quality and influencing future participation. In addition to these benefits, the study delves into the exploration of three key factors in co

The project aims to implement an automated environment for periodic system evaluation. The main objective is to develop a tool that can autonomously assess and monitor the performance of a medical station. The tool executes the evaluation process in three steps. Firstly, it updates the device to the latest version, incorporating new features and issue fixes. Secondly, a battery of unit tests verifies proper functionality, providing a thorough non-regression evaluation. Lastly, the system subjects the device to a stress test, simulating maximum infusions while gathering internal information from Linux. Collected data is analyzed and based on the results, the system accepts as satisfactory performance or issues a warning if problems are detected. By implementing this automated environment, the project streamlines the evaluation process, automates performance monitoring and improves overall efficiency and reliability of device assessments, reducing the regressions and blocking problems due not detected problems before releases.

In many industrial sectors, device manufacturers are moving away from expensive special-purpose hardware units and consolidate their systems on commodity hardware. As part of this change, developers are enabled to run their applications on general-purpose operating systems like Linux, which already supports thousands of different devices out of the box and can be used in a wide range of target scenarios. Furthermore, the Linux ecosystem allows them to integrate existing implementations of standard functionality in the form of shared libraries. However, as the libraries and the Linux kernel are designed as generic building blocks in order to support as many applications as possible, they cannot make assumptions about specific use cases for a single-purpose device. This generality leads to unnecessary overheads in narrowly defined target scenarios, as unneeded components do not only take up space on the target system but have to be maintained over the lifetime of the device as well. While the Linux kernel provides a configuration system to disable unneeded functionality like device drivers, determining the required features from over 16000 options is an infeasible task. Even worse, most shared libraries cannot be customized even though only around 10 percent of their functions are ever used by applications. In this thesis, I present my approaches for the automated identification and removal of unnecessary components in all layers of the software stack. As the configuration system is an integral part of the Linux kernel, we embrace its presence and automatically generate custom-fitted configurations for observed target scenarios with the help of an extracted variability model. For the much more diverse realm of shared libraries, with different programming languages, build systems, and a lack of configurability, I demonstrate a different approach. By identifying individual functions as logically distinct units, we construct a symbol-level dependency graph across the app

A highly accurate sensor for measuring distances, used for creating high-resolution 3D maps of the environment, utilize “Light Detection And Ranging” (LiDAR) technology. This degree project aims to investigate the implementation of 3D LiDAR sensors into off-highway vehicle display computers, called CCpilots. This involves a study of available low-cost 3D LiDAR sensors on the market and development of an application for visualizing real time data graphically, with room for optimization algorithms. The selected LiDAR sensor is “Livox Mid-360”, a hybrid-solid technology and a field of view of 360° horizontally and 59° vertically. The LiDAR application was developed using Livox SDK2 combined with a C++ back-end, in order to visualize data using Qt QML as the Graphical User Interface design tool. A filter was utilized from the Point Cloud Library (PCL), called a voxel grid filter, for optimization purpose. Real time 3D LiDAR sensor data was graphically visualized on the display computer CCpilot X900. The voxel grid filter had a few visual advantages, although it consumed more processor power compared to when no filter was used. Whether a filter was used or not, all points generated by the LiDAR sensor could be processed and visualized by the developed application without any latency.

The aim of this project is to implement a Radio Controlled (RC) car with a Light Detection and Ranging (LiDAR) sensor and a stereoscopic camera setup based on the Robot Operating System (ROS) to conduct Simultaneous Localization and Mapping (SLAM). The LiDAR sensor used is a 2D LiDAR, RPlidar A1, and the stereoscopic camera setup is made of two monocular cameras, Raspberry Pi Camera v2. The sensors were mounted on the RC car and connected using two Raspberry Pi microcomputers. The 2D LiDAR sensor was used for two-dimensional mapping and the stereo vision from the camera setup for three-dimensional mapping. RC car movement information, odometry, necessary for SLAM was derived using either the LiDAR data or the data from the stereoscopic camera setup. Two means of SLAM were implemented both separately and together for mapping an office space. The SLAM algorithms adopted the Real Time Appearance Based Mapping (RTAB-map) package in the open-source ROS. The results of the mapping indicated that the RPlidar A1 was able to provide a precise mapping, but showed difficulty when mapping in large circular patterns as the odometry drift resulted in the mismatch of the current mapping with the earlier mapping of the same positions and secondly in localization when turning quickly. The camera setup derived more information about surrounding and showed more robust odometry. However, the setup performed poorly for the mapping of visual loop closures, i.e., the current mapping did not match the earlier mapping of earlier visited positions.

Inom nätverkstekniken och datakommunikationen råder idag en tro på tekniken nätverkscache som kan spara data för att senare kunna hämta hem det snabbare. Tekniken har genom åren visat att den effektivt kan skicka den önskade data till sina klienter. Det finns flera cache-tjänster som använder tekniken för Windows-uppdateringar. Bland dessa finns Windows Server Update Services (WSUS) och LanCache. På uppdrag från företaget TNS Gaming AB jämförs dessa tjänster med varandra under examensarbetet. Nätverkscache är ett intressant forskningsområde för framtida kommunikationssystem och nätverk tack vare sina fördelar. Likaså är uppgiften om att jämföra cache-tjänsterna WSUS och LanCache intressant i och med det öppnar upp insikt om vilken tjänst är bättre för företaget eller andra intressenter. Både forskningsområdet och uppgiften är viktiga och intressanta när användare vill effektivisera användningen av internetanslutningen och bespara nätverksresurser. Därmed kan tekniken minska nedladdningstiden. Till det här arbetet besvaras frågor om vilken nätverksprestanda, resursanvändning och administrationstid respektive cache-tjänst har, och vilken cache-tjänst som lämpar sig bättre för företagets behov. I arbetet genomförs experiment, som omfattar tre huvudmättningar, och följs av en enfallstudie. Syftet med arbetet är att med hjälp av experimentets mätningar få en jämförelse mellan WSUS och LanCache. Resultatet av arbetet utgör sedan ett underlag för det framtida lösningsvalet. Resultaten består av två delar. Den första visar att båda cache-tjänsterna bidrar till kortare nedladdningstider. Den andra är att LanCache är bättre än WSUS när det gäller nätverksprestanda och resursanvändning, samt mindre administrationstid jämfört med WSUS. Givet resultat dras slutsatsen att LanCache är cache-tjänsten som är mest lämpad i det här fallet., In the field of network technology and data communication, there is a current belief in the technology of network caching, which can store data to later retrieve it more quickly. Over the years, this technology has proven its ability to efficiently deliver the desired data to its clients. There are several caching services that utilize this technology for Windows updates, among them are Windows Server Update Services (WSUS) and LanCache. On behalf of the company TNS Gaming AB, these services are compared to each other in this thesis. Network caching is an interesting area of research for future communication systems and networks due to its benefits. Likewise, the task of comparing the cache services WSUS and LanCache is interesting as it provides insights into which service is better suited for the company or other stakeholders. Both the research area and the task are important and intriguing when users seek to streamline the use of their internet connection and conserve network resources. Thus, the technology can reduce download times. For this work, questions about the network performance, resource usage, and administration time of each cache service are answered, as well as which cache service that is better suited to the company's needs. The work involves conducting experiments, including three main measurements, followed by a single case study. The purpose of the work is to compare WSUS and LanCache using the measurements from the experiment. The outcome of the work then forms a basis for future solution choice. The results consist of two parts. The first shows that both cache services contribute to shorter download times. The second is that LanCache outperforms WSUS in terms of network performance and resource usage, and also requires less administration time than WSUS. Given the results, the conclusion is drawn that LanCache is the most suitable caching service in this case.

This thesis describes a project that aimed to create a digital tool for use at a company. The tool performs a useful function that had been requested for a while by both management and the proposed users. The tool shows orders to be packed at the warehouse. The tool differs from the current system used in that it can show new orders placed in realtime instead of with the current systems delay. Wanted features were both ease of use in regards of quickly understanding the information, as well as information about the total workload. There is no interactivity, since the tool simply displays information. New queries to the existing database were tested, and problem solving was done to get the real-time aspect of the tool working correctly. The tool uses the existing database and technology similar to that of a simple web page, with a backend consisting of Node.js and NginX. The frontend for the project, which is the graphical presentation, uses HTML, CSS and JS. The result of this project was the actual tool in use by the company. It is used to see the total amount of orders as well as item counts for each order, on a day by day basis. Overall, the project was quite successful since the results were decent. However, some parts could be improved., Denna uppsats beskriver ett projekt som handlade om att skapa ett digitalt verktyg hos ett företag. Verktyget fyller en funktion som efterfrågats länge av både företagets ledning och de som är användarna av verktyget. Det verktyget gör är att visa ordrar bestående av varor som ska packas på ett lager. Verktyget skiljer sig från det befintliga systemet på företaget i den aspekten att det kan visa nya inkommande ordrar i realtid, istället för med lång fördröjning.Önskemålen från ledningen och lagerarbetarna var att lätt kunna överblicka ordrar som finns, med information om hur mycket det finns att göra. Verktyget ska kunna användas utan interaktion från användarna, det ska alltså endast visa information.För att se ordrar i realtid så krävdes att nya databasfrågor testades, med problemlösning kring dessa. Verktyget använder sig av den befintliga databasen, och presenterar information på en skärm nära plockstationerna på lagret. Teknikerna som använts är de för en enkel webbsida, en backend med Node.js och NginX. Frontend för verktyget, alltså det grafiska gränssnittet, använder HTML, CSS och JS. Resultatet av projektet är verktyget som togs i drift på företagets lager. Verktyget används för att se antalet ordrar och artiklar per order, uppställt dag för dag. Projektet var lyckat, då ett bra resultat uppnåddes, dock finns förbättringspotential.

Hackare fortsätter att bli bättre på att få otillåten tillgång till våra datorer och kan undvika de mest grundläggande intrångsskyddade system och brandväggar på en standarddator. Då numren av intrång växer varje år och kostar företag miljoner av dollar, så verkar gapet mellan attackerare och försvarare att bli större. Frågan som då kan uppstå är, hur kan vi skydda oss själva? Kunskapen som blivit insamlad i detta arbete pekar tydligt på att det finns saker vi kan göra vilket svarar på frågan, hur kan vi upptäcka intrång? Studien visar att mer avancerade Intrusion Detection System (IDS) kan bli implementerad på hemdatorer (och i företag). Det finns många alternativ att välja mellan, men de valda IDSer – OSSEC och Snort – kan upptäcka säkerhetsbrister på enskilda host-maskiner (eller på nätverket) i realtid tack vare avancerad loggningshanterings och övervakning. Svårighetsgraden av att använda och implementera dessa IDSer var utmanande men tillfredställande och konfigurationen var flexibel vilket tillåter IDSerna att bli installerade på en ensam host-dator eller i ett nätverk. Om ett enkelt-att-följa grafiskt översikt av felmeddelanden är vad man önskar så har OSSEC IDS, tillsammans med att skicka e-mail över felmeddelandet, den funktionaliteten. Snort, på andra sidan, har en enkel konfiguration och flexibilitet i att skriva regler. Det borde framgå tydligt att implementera en IDS på ert system inte gör det ogenomträngligt, inte heller löser det alla säkerhetsrelaterade problem, men det som kommer att hända är att vi får en bättre förståelse av de hot som uppstår i våra system., Hackers keeps getting better at gaining unauthorized access to our computers and can avoid some of the most basic intrusion detection systems and firewalls on a standard computer. The gap between attackers and defenders seem to grow as intrusions increase in numbers every year, costing companies millions of dollars, so the question is posed, how can we protect ourselves? The research done in this work clearly points to that there are things that can be done which answers the question, how can we detect intrusions? The study has shown that a more advanced intrusion detection system (IDS) can be implemented on home computers (and in businesses). There are many options to choose from but the chosen IDSs – OSSEC and Snort – can detect security issues on the host computer (or on the network) in real-time by advanced logging management and monitoring. The implementation and usage difficulties of these IDSs are challenging but satisfying and the configurations are flexible allowing the IDSs to be installed on a single host or in a larger network. If an easy-to-follow graphical overview of the alerts on your system is what you are looking for then that, and sending e-mails of the alert, is found in the OSSEC IDS. Snort, on the other hand, has easy configurations and flexible rule-writing and the options of sniffing packets on the network. It should be clear that implementing an IDS on your system does not make it impenetrable nor solve all the security issues but what it will do is to give you a better understanding of the threats on your system.

Understanding the background activity of a computer and its operating system when running an arbitrary application can lead to important performance discoveries. This is especially interesting in cases where the same task of an application is run over and over again and there is an expected run time, such as in testing. If a major deviation in the run time occurs, it can be crucial to know the reason to prevent it from happening again. Additionally, finding the relevant measurements to explain the performance in a compact way such as a score can further help both the readability and understanding of the performance. For this project, a tool was developed that, using existing tools, measures various parts of a computer and its operating system and presents their activity during the run time of a selected application over multiple iterations, as well as calculates the relevance of the different measurements with the purpose of finding one that can consistently rate the overall performance. Using the results, no single measurement was found that could rate the overall performance on a consistent level, only for specific scenarios. Possible causes for performance deviations could be found, however. The results show that although there is some activity in the background, most background operating system noise does not have a major effect on performance and that major deviations in the run time are rare. However, inflicting manual noise in either the form of CPU usage or memory usage can cause major performance penalties, sometimes reaching up to the double average run time.

Las misiones espaciales a pequeños cuerpos del sistema solar (NEAR-Schoemaker, Rosetta, Hayabusa 1 y 2, OSIRIS-REx, AIDA) han ido evolucionando en las dos últimas décadas de forma que los futuros proyectos de este tipo incorporarán módulos de aterrizaje con movilidad para el análisis de muestras in situ o mediciones de vario tipo. El aterrizaje sobre un cuerpo celeste en condiciones de micro-gravedad es un desafío tecnológico que la industria aeroespacial tendrá que afrontar en breve. Diseñar mecanismos eficientes de aterrizaje y movilidad sobre asteroides o cometas será uno de los principales problemas en este tipo de misiones en las próximas décadas. El trabajo propuesto pretende diseñar un mecanismo de este tipo, aprendiendo de mecanismos ya utilizados o utilizando nuevos planteamientos.

At the moment, the technological world is undergoing an unprecedented expansion due to the fourth industrial revolution and the access or update of small and medium-sized enterprises to information technologies. This has led to the emergence of a wide range of jobs with low material investment, the requirement of high curriculum qualification, and the possibility of employee delocalization, promoting the growth of what has come to be known as ¿remote engineering¿. Employees who have entered this new work environment use similar tools due to their predominantly ¿remote¿ condition, regardless of whether they belong to a large company or a startup, or being freelancers, or being subcontracted by external consulting firms. In parallel, the COVID-19 pandemic, the need and ease of remote work, as well as the balance of home office, have become evident. However, it has created the fallacy of the engineer with a computer, capable of working from home with colleagues they have never met physically, as well as the inevitable return to the office due to a loss of productivity in many companies[6]. This Bachelor¿s Degree analyzes, evaluates, and implements a solution for creating a remote engineering development office, used by the author on his own, detailing and explaining the problems and solutions undertaken during its construction. In the appendices, the state of the art of the main points of interest regarding the project is summarized, especially in the technological field, and a possible guide for launching a technology startup from a technical perspective is presented since the requirements are applicable to both remote and in-house workers, or even to the initial development of a company with few employees. The main goal is to obtain a minimal set of resources that, in a fairly generic manner and without excessive cost, enable the proper development of activities, overcoming challenges, and facilitating the creation of collaborative work tools. Furthermore, this templ

The rise of technologies such as 6G networks, edge computing, and the Industrial Internet has led to a dramatic increase in the amount of data that needs to be transmitted over heterogeneous integrated networks. The resources of embedded devices limit the ability of the Industrial Internet to transmit data. While the multipath transmission mechanism can mitigate data transmission issues of low reliability and low real-time performance from the network-level perspective. As the complexity of industry applications increases, however, the phenomenon that the high-quality data transmission is subject to the influence of the underlying layer is becoming increasingly apparent. The paper aims to explores the possibility of multipath transmission protocol running on a real-time kernel from the perspective of the operating system, as there is a lack of research and reports in this area. Based on RT-Preempt, a real-time system RT-Linux suitable for the “NXP i.MX6Q” ARM integrated board has been proposed, which replaces the native Linux kernel to optimize and enhance its real-time performance. As described in the experiment part, the original standard Linux system OR-Linux and the new RT-Linux are tested with single-threaded and multi-threaded load experiments, respectively. The results of the analysis show that this paper provides a way of validating the trial data and ensuring its accuracy using the lognormal distribution model, which is a statistical distribution used to model variables that are positive and skewed to the right. The RT-Linux scheme has better real-time performance and is more stable than the OR-Linux scheme after real-time processing, showing the viability of the scheme.

Tato práce se zabývá tématem využití distribuce Red Hat Enterprise Linux a dalších od ní odvozených pro výuku počítačových sítí. Znázorňuje a popisuje technologie používané v počítačových sítích aplikované v prostředí distribucí založených na Red Hat Enterprise Linux. Jejím cílem je prezentovat nastavení a provoz služeb přes lokální síť a poskytnout tak návod pro konfiguraci těchto služeb. Práce porovnává jednotlivé distribuce vycházející z Red Hat Enterprise Linux a snaží se čtenářovi přiblížit jejich silné a slabé stránky. Následná implementace a testování služeb probíhá ve virtualizovaném prostředí na počítačích, které používají ke své funkci operační systém Rocky Linux., This thesis deals with the topic of using the Red Hat Enterprise Linux distribution and others derived from it for teaching computer networks. Illustrates and describes the technologies used in computer networks applied in the environment of distributions based on Red Hat Enterprise Linux. Its goal is to present the setting and operation of services over the local network and thus provide instructions for the configuration of these services. The work compares individual distributions based on Red Hat Enterprise Linux and tries to bring the reader closer to their strengths and weaknesses. Subsequent implementation and testing of services takes place in a virtualized environment on computers, which uses for its function operating system Rocky Linux., Fakulta elektrotechniky a informatiky, Cílem bakalářské práce bylo vytvoření manuálu pro využití distribuce RHEL9 pro výuku počítačových sítí. V teoretické části bakalářské práce bylo popsání distribuce, jednotlivé síťové služby a protokoly. V praktické části práce byla vytvořena s použitím virtualizovaného prostředí síťová laboratoř včetně ukázkových úloh. Dle vedoucího byla bakalářská práce zpracována přehledně, obsahuje všechny potřebné náležitosti a je v požadovaném rozsahu. Student pracoval samostatně, zejména při návrhu testovacího prostředí a tvorbě konfiguračních skriptů. Student zodpověděl dotazy a reagoval na připomínky vedoucího bakalářské práce, předsedy i členů komise pro státní závěrečné zkoušky., Dokončená práce s úspěšnou obhajobou

Bakalářská práce se zabývá vytvářením testovacích skriptů pro různé aplikace s grafickým uživatelským rozhraním. Úkony, které provádí uživatel, se simulují za pomoci nástrojů, které provádí klikání myší a stisky kláves. V této práci jsem vytvářel skripty se dvěma nástroji. Prvním je nástroj xdotool, který lze využívat v terminálu operačního systému, či vytvářet bash skripty, které využívají tento nástroj. Druhý nástroj využívá skriptovací jazyk Python a knihovnu PyAutoGUI. Tyto nástroje fungují na velmi podobné bázi, ale každý má svoje výhody a nevýhody., Bachelor thesis is focused on creating of testing scripts for various applications with graphical user interface. The tasks, that user does, are simulated using tools, which take care of clicking the mouse buttons and pressing keys on the keyboard. I this thesis i created scripts using two different tools. The first one is xdotool, which can be used directly from the operating system terminal, or to create bash scripts. The second one is the programming language Python and its library PyAutoGUI. These tool work on the same principle, but each one has its pros and cons., Fakulta elektrotechniky a informatiky, Cílem bakalářské práce bylo vytvoření manuálu pro automatické testování GUI aplikací pro operační systém LINUX. V teoretické části práce byla popsána problematika automatického testování za pomoci nástroje xdotool. V praktické části práce student vytvořil testovací bash skripty, pomocí kterých otestuje některé aplikace, např. Calculator, Thunderbird. Dle vedoucího byla bakalářská práce zpracována přehledně, obsahuje všechny potřebné náležitosti a je v požadovaném rozsahu. Student pracoval samostatně zejména při návrhu a tvorbě testovacích skriptů., Dokončená práce s úspěšnou obhajobou

The ongoing digitalization of the world, estimated to reach a yearly data generation of 200 Zettabytes by 2025, is putting increasing pressure on system developers to provide systems capable of scaling with future needs. Of particular importance are the data storage systems, providing the means of storing and retrieving the vast amounts of data. One widely adopted storage technology, predicted to become the leading media for future data storage, is flash-based solid state drives (SSD). The complex architecture of flash SSD however introduces several challenges, such as necessary garbage collection, for managing the flash storage. To readily integrate flash SSD into storage systems, the flash management idiosyncrasies are hidden inside the storage device. The hiding of the flash management idiosyncrasies has however been identified to have significant performance implications. As a result, numerous efforts have pushed towards more open flash storage interfaces, with the most recent addition of Zoned Namespace (ZNS) flash SSD. ZNS SSD presents a unique opportunity for storage software and the flash SSD to coordinate the flash management responsibilities. While the open flash storage interface of ZNS presents a plethora of opportunity in software optimization, current software support is in its early stages, leaving much of its potentials yet to be explored. In this work, we present msF2FS (multi-streamed F2FS), a file system with optimized ZNS integration, based on the de facto standard flash file system F2FS. msF2FS enhances the ZNS integration by leveraging the parallelism capabilities of ZNS SSD, and increasing the coordination between the file system and applications for data placement decision-making. The data placement coordination between file system and application reduces the sub-optimal data placement decisions made by the file system. Evaluations of msF2Fs show the benefit of the application and file system coordination, with the RocksDB applicatio, Computer Science

El objetivo del trabajo es mejorar y modernizar un laboratorio HPC situado en el departamento de Física de la Matéria Condensada de la Facultad de Física en la Universidad de Barcelona. Consistirá en implementar una arquitectura unificada que mejore la gestión y la seguridad de la infrastructura, integrando nodos CPU y GPU, permitiendo una administración centralizada de los recursos, y permitiendo la ejecución de trabajos con el sistema de colas SLURM., The objective of the work is to improve and modernize an HPC laboratory located in the Department of Condensed Matter Physics of the Faculty of Physics at the University of Barcelona, where I currently work and develop the role of systems administrator. This lab is used by researchers and PhD students to run high performance calculations and simulations. The infrastructure currently consists of a 40-node computing cluster based on CPUs, managed through the SGE scheduler. In addition, the laboratory has another 6 isolated GPU servers. Given the segregation between these systems, the need arises for a unified architecture that improves both the management and the security of the infrastructure. For this reason, my objective is to implement a new cluster from scratch, which integrates both CPU and GPU nodes, allowing a centralized and more sophisticated management of resources. To achieve this goal, the idea is to integrate a cluster of Linux servers managed by a SLURM queue system, in addition to implementing a multiversion software manager through EasyBuild and a module manager. On the other hand, for user management, the use of software based on the LDAP protocol and a remote backup system to provide security copies are proposed.

Electrical generators are rotating machines that convert mechanical energy into electrical energy, their study is important because all electronic and electrical devices work with electricity and this must be generated in some way; although there are several ways of generation, the most common is with the use of electrical generators. This served as motivation for the present study, where the basic modeling of a DC electric generator with permanent field is presented, considering as input the angular velocity and as outputs: voltage, current and torque; a linear, first order and stable model is analyzed. For the development of the model a differential equation was considered where the voltage drop in the internal inductance of the machine contains a derivative with respect to time; this served to make approximations by a finite difference equation and to obtain recursive functions that were programmed in ANSI C for GNU/Linux. To validate the results, the parameters and construction variables were obtained from the real generator, based on its board data; finally the results were saved in text format files for offline graphing, which are presented in the corresponding section of this document., Los generadores eléctricos son máquinas rotatorias que convierten energía mecánica en energía eléctrica, su estudio es importante ya que todos los aparatos electrónicos y eléctricos funcionan con electricidad y ésta debe ser generada de alguna manera; a pesar de que existen diversas formas de generación, la más común es con el uso de generadores eléctricos. Esto sirvió de motivación para el presente estudio, donde se presenta el modelado básico de un generador eléctrico de corriente continúa con campo permanente, considerando como entrada la velocidad angular y como salidas: voltaje, corriente y torque; se analiza un modelo lineal, de primer orden y estable. Para el desarrollo del modelo se consideró una ecuación diferencial donde la caída de tensión en la inductancia interna de la máquina contiene una derivada respecto al tiempo; esto sirvió para hacer aproximaciones por unas ecuaciones en diferencias finitas y obtener funciones recursivas que fue programadas en ANSI C para GNU/Linux. Para validar los resultados, los parámetros y variables de construcción fueron obtenidos de generador real, basándose en sus datos de placa; finalmente los resultados fueron guardados en archivos de formato texto para su graficación fuera de línea que se presentan en la sección correspondiente en este documento.

[ES] Este trabajo muestra un diseño de un SoC basado en Zynq para la verificación automática de una tarjeta de control de un convertidor de electrónica de potencia. El objetivo es verificar el correcto funcionamiento de entradas y salidas digitales, entradas analógicas y salidas PWM. Para ello se ha realizado la implementación de lógica de control en FPGA encargada de la comunicación con los dispositivos hardware y un core utilizado para la medida de PWMs. Se ha configurado una imagen de Linux con la herramienta PetaLinux, incluyendo los drivers necesarios para el control del hardware. Para facilitar al usuario las pruebas se ha desarrollado un software en C que se ejecuta sobre el sistema operativo Linux. Adicionalmente se ha diseñado una interfaz gráfica en Qt para automatizar y facilitar las pruebas.

[ES] En este trabajo se ha desarrollado el software de un sistema electrónico de soporte para móviles Android. La finalidad del sistema de soporte es convertir un móvil Android en una sonda móvil autónoma, llamada Picosonda, accesible y configurable desde el exterior, capaz de realizar pruebas que determinan la calidad de la red de un operador. Esto permitirá conocer la experiencia real del usuario de las redes de telecomunicaciones, lo cual tiene gran importancia para los operadores de red. El software del sistema de soporte está basado en una distribución de Linux embebido, generada con Yocto Project debido a las características que ofrece para realizar configuraciones y posibles migraciones de manera rápida y ordenada. Se describirán los pasos a seguir para realizar configuraciones sobre el bootloader, el kernel y el espacio de usuario de la distribución de Linux creada para este trabajo. Para controlar el hardware y llevar a cabo todas las tareas del sistema de soporte se han desarrollado aplicaciones y librerías compartidas en C/C++ con Eclipse IDE. Mediante el uso de librerías compartidas se pretende conseguir un software modular que permita reutilizar las funciones creadas para controlar los periféricos, sensores y actuadores del sistema. La aplicación principal del sistema de soporte carga las librerías y lanza varios hilos que controlan cada una de las tareas que debe realizar. Por último se expondrán las conclusiones finales tras la realización de este trabajo, así cómo una serie de propuestas de actividades a desarrollar en el futuro.

The Robot Operating System (ROS) has become the de facto standard middleware in the robotics community [1]. ROS bundles everything, from low-level drivers to tools that transform among coordinate systems, to state-of-the-art perception and control algorithms. One of ROS's key merits is the rich ecosystem of standardized tools to build and distribute ROS-based software.

The article provides a survey on cloud platforms suitable for a virtual online laboratory, which contains Linux online environments and is intended to support the Operating Systems course.The study justifies the choice of utilizing private cloud as a deployment model and IaaS as a service model and substantiates the decision to create specially tailored cloud environments adapted for educational needs in contrast to applying ready-made IaaS (Infrastructure as a Service) cloud services given by providers. The related works on cloud platforms for teaching operating systems are analyzed. The study also makes a review of the authors' previous research on virtualization tools and environments for the Operating Systems course and Cisco CyberSecurity Operations course. The basic and additional requirements for cloud computing software for virtual online laboratory supporting Operating Systems course have been elaborated. Finally, the work makes the comparison of Eucalyptus, OpenStack, CloudStack and OpenNebula cloud platforms and substantiates the selection among these cloud computing software the platforms of the first and the second choice.

SMB es un protocolo para compartir recursos ampliamente extendido en redes locales y corporativas, presente de manera nativa en Windows y a través de Samba en otros sistemas. Es precisamente a consecuencia de esta presencia y de famosas vulnerabilidades descubiertas (aunque parcheadas), que se ha convertido en un objetivo prioritario de múltiples ataques informáticos. Para realizar un pentesting de SMB adecuado, se hace necesario disponer de toda la información posible. Es por ello que la enumeración de SMB es un habilidad fundamental para todo pentester. En este artículo, se hará una recopilación de algunas herramientas Open Source que permitirán al auditor recopilar información precisa. Es importante tener en cuenta que las herramientas aquí expuestas están pensadas para una auditoría de caja negra, en la que sólo tenemos acceso de red a las máquinas objetivo, pero no hemos accedido aún a ellas para una enumeración post-explotación.

Thread pools, integrated in programming languages, packages and dependencies are widely used by developers. Thread pools assume they are running alone on the system, which is not always the case. Previous research has shown that adapting thread pool size has been effective under specific conditions. In this research, scaling the thread pool with respect to CPU and network usage is examined. However, simpler metrics can achieve better results. Two solutions are provided for algorithmically scaling the thread pool, both with a different use-case in mind. Next to that an improved way to collect CPU and network metrics is provided, allowing for real-time thread-based measurements. The result of the scaling solution is improved performance, while also offering reduced energy usage. This research shows that when multiple thread pools are running on the same machine, performance and efficiency is improved., Computer Science | Distributed Systems

The world of computer networks is constantly evolving towards more efficient algorithms and more effective ways of using hardware resources. One of these evolutions is the eXpress Data Path (XDP). XDP is an interrupt based data path in the Linux kernel. XDP uses JIT-compiled programs in a virtual machine in a device driver context. Through XDP, fast packet processing is possible while still keeping the functionality of the Linux kernel intact. Therefore, this thesis aims to illuminate possible use cases for XDP in 5G simulators, as this real-world application of XDP is of interest. Specifically, use-cases where there is a need for fast packet processing. This thesis evaluates the use-cases using a performance evaluation of XDP and a literary review of 5G simulators, XDP, and technologies relating to XDP. This evaluation indicates that XDP is a candidate for packet processing in 5G simulators, specifically when compared to what performance is possible currently. This thesis argues from the performance evaluation and the literary review that XDP can be used for small programs, preferably data ingestion, in 5G simulators.

The project is about embedded systems in self-driving vehicles which is a growing andcurrent area. This is important as the automation of vehicles can make different sectorssuch as the mining and logistics industry more effective. This work relates to the topicas it aims to improve part of the self-driving software stack by replacing Ubuntu with aless resource-intensive Linux based system. The main goal of this work is to implementand document improvements. The work contains a research part where advantages anddisadvantages are compared against each other, followed by an implementation thatiteratively solved one problem at a time.The result became instructions and documentation describing the choices madefor a less resource demanding Linux based system. It also includes instructions anddocumentation for two different application that are part of the software stack., Projektet handlar om inbyggda system i självkörande fordon vilket är ett växande ochaktuellt område. Det är viktigt då automatiseringen av fordon kan effektivisera mångaolika sektorer som till exempel gruv- och logistikindustrin. Detta arbete relaterar tillämnet då det har som mål att effektivisera en del av den självkörande mjukvarustackengenom att byta ut Ubuntu till ett mindre resurskrävande Linux-system. Huvudmålet meddetta arbete är att implementera och dokumentera förbättringar. Arbetet innehåller en ut-redningsdel där för- och nackdelar jämförs mot varandra följt av en implementationsdelsom iterativt hanterar ett problem i taget.Resultatet blev instruktioner och dokumentation över de val som tagits för ett mindreresurskrävande Linux-system samt instruktioner och dokumentation över två applikatio-ner som är en del av mjukvarustacken.

PC-Dart is a software that the Swedish Armed Forces use to communicate when active on the field. They are limited to using the program only on Windows operating system, and their devices are not suitable for challenging contexts. It is not convenient for the army to bring impractical devices to the field, and it requires the soldiers to bring sleds of batteries and charging equipment with them. This thesis explores the possibilities of recreating the graphical user interface onto other platforms such as Android and Linux. It helps to increase the mobility on the field for the troops of the Swedish Armed Forces, which also means that there is not any restrictions by using their program on one platform. The development of the program required a pilot study on what available cross-platform frameworks to use in terms of developing an application that works on multiple platforms. Together with a relevant framework and a custom user-centered agile work process, this thesis strives to create an application that is cross-platform and with a graphical user interface that old users of the previous program can relate to. The project results show that a graphical user interface can be developed with a cross-platform framework while working in a user-centered agile process. However, it also shows that it can be a lot of work for one person, negatively affecting the process.