Online software businesses constantly face new challenges. Businesses are competing to deliver high-quality software solutions to their end users as quickly as possible. The performance of a software team in terms of software delivery needs to be measured to identify bottlenecks and understand what can be improved. This project is a case study of a software organisation that delivers online web solutions for a business. The organisation strives to follow a DevOps mindset and work data-driven by collecting data, learning from it and acting on the learnings. Our method to perform the case study was to study existing data collected by the organisation and conduct interviews with software professionals to get their insights about the software delivery performance of three software teams within the organisation. We focus on two metrics - deployment frequency and lead time for change - which measure the throughput of a software team and how often and fast it can deploy changes to production. Software organisations that adopt a DevOps approach are facing challenges with collecting data about their software delivery performance and learning from that data to improve their throughput. We aim to identify these challenges and discuss various problems that software organisations need to be aware of when measuring software delivery performance. We present the results from the interviews and collected metrics, analyse them and discuss them, as well as give suggestions on future research. We observe that there are multiple factors impacting software delivery performance and various challenges with measuring it accurately. This is related to the way of reporting data reliably and developing models to study and understand the collected data.

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Continuous integration, continuous delivery och continuous deployment har blivit väldigt viktiga inom systemutveckling eftersom de hjälper att säkerställa att en programvara håller sig till en viss kvalité samt att den snabbt kan levereras till slutanvändarna. Organisationer som tidigare använde continuous practices i samband med mer traditionella programvaror som till exempel webb-, server- och skrivbordsapplikationer försöker idag även implementera continuous practices i samband med mobila applikationer som till exempel hybrida appar. Bygg- och leveransprocessen för hybrida mobila applikationer består av många steg som ska göras i rätt ordning. När den processen utförs manuellt ökar det risken för att en app inte kommer att hålla en genomgående hög kvalité samt att det kan bli svårt att säkerställa att appen kan levereras vid behov till slutanvändarna. Det kan bero på flera faktorer. En av dessa faktorer är att människor inte är bra på att utföra långa och upprepbara processer och begår därför ofta fel och misstag. Tidigare studier som gjordes inom continuous integration, -delivery och -deployment saknar hur continuous practices kan appliceras till bygg- och leveransprocessen för hybrida mobila applikationer samt hur det kan göras i en organisation där det finns en existerande bygg- och leveransplattform. På grund av det utfördes den här studien med syftet att skapa en IT-artefakt i form av en pipeline som kan minska eller utesluta mänsklig påverkan på bygg- och leveransprocessen för hybrida mobila applikationer. Studien genomfördes med Action Design Research som bestod av tre iterationer och resulterade i en IT-artefakt i form av en pipeline som kunde utföra automatisk bygg och leverans av hybrida mobila applikationer. Förutom IT-artefakten kunde även ett antal designprinciper identifieras som var lämpliga när en pipeline för hybrida appar formades. Studiens resultat visade att med hjälp av continuous practices är det möjligt att automatisera bygg och leverans av hybrida appar samt att det går att implementera en pipeline för hybrida appar i en bygg- och leveransplattform som används för andra typer av programvaror.

Considering that the greatest fear of deploying military personnel is separation from family, an obvious and overlooked psychological phenomenon that merits further investigation is loneliness. In this study, 131 US troops completed the UCLA Loneliness Scale, Anxiety Control Questionnaire, and a leisurely activity participation scale to predict loneliness with participation in non-work activities in the presence of another moderator (locus of control) and various demographic factors. As hypothesized, the results indicated that 1) the best non-work activity predictors of loneliness were emailing friends and listening to music, 2) external locus of control was positively correlated with loneliness and internal locus of control was negatively correlated with loneliness, and 3) loneliness was positively correlated with length of time deployed.

The Internet of Things (IoT) is a concept where sensors combined with microcontrollers enhance our everyday life. In the year 2050, there will be around 30 billion connected IoT systems, for developing this large amount of systems and maintaining them there will be a need to use over-the-air updates (OTA). With the increasing growth of IoT systems, there will also rise more OTA update solutions as tools for maintaining and enhancing IoT systems. In this bachelor's degree project, evaluations and comparisons of different OTA update techniques supporting microcontrollers of the type ESP32 are done by using controlled experiments. This study focuses on testing the update procedure with experiments that test OTA update deployment time and update rollback functionality.

Background: Automation deployment is an innovative solution for organisations andbusinesses to improve efficiency and increase value. This study examines the impact ofleadership, learning culture and willingness to automation deployment and, therefore,organisational performance. Two types of leadership styles, participative and autocratic, havebeen selected to analyse their impact on the promotion and deployment of innovative solutionslike automation. The method to measure the success of the organisational performance wasbased on internal improvements of the team's efficiency and productivity using automated tools.An explanatory study was conducted using a questionnaire shared with 242 professionals in theICT industry in Europe to verify our hypotheses. Objectives: The objective of this study was to investigate whether leadership, learning cultureand employees’ willingness to change affect the automation deployment and how the latterimpacts the organisational performance. Methodology: A quantitative case study based on an online questionnaire using Google formshas been formed to collect data for analysis. Two multivariate regression models have beendeveloped to evaluate the 77 responses collected from the participants with familiarity andexposure to the automation technology. Results & Conclusions: The results align with the existing literature in the fields of innovation,organisational culture, and performance. More specifically, we discovered that the autocraticstyle negatively affects the automation deployment (B=-2.89, p=0.008), while learning culture(B=0.38, p=0.001,) and willingness to change (B=0.8, p=0,) could be considered as enablerssince both found with positive coefficients. Moreover, the automation deployment has beenidentified as a significant variable that affects organisational performance (B=1, p=0).Additionally, the findings from both models are underpinned by the existing literature provingtheir validity. Recommendations for future research: Future work could be focused on including otherleadership styles, such as transformational or entrepreneurial, to examine the impact onautomation deployment and organisational performance. Additionally, the performance couldbe evaluated based on the final service or product of the company, considering customers'feedback or financial terms. Last but not least, expanding the research to other organisationsthat are considering or have already deployed automation would shed more light on the effectto the organisational performance.

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With the help of sounding rockets, the Earth’sionosphere can be studied by ejecting cylindrical units thatmeasure various electromagnetic properties while falling. Theseunits are also known as Free Falling Units (FFUs). The goal of thisproject is to turn the FFUs into autonomous gliders by designingdeployable wings. A spring-loaded Scissor Structural Mechanism(SSM) was chosen as the main deploying mechanism. Furthermore,the conceptual wing design was simulated in Siemens NXand a structural analysis was performed in NASTRAN. Finally, aprototype was manufactured to confirm if the SSM would workas intended. Initial simulation results showed great promise withthe proper choice of materials. Due to resource limitations, theprototype could not be compared to the simulation. Based onthe prototype results, the design must be reinforced or alteredto become stronger and more rigid. / Med hjälp av sondraketer kan jordensjonosfär studeras genom att skicka ut cylindriska enhetersom mäter diverse elektromagnetiska egenskaper medan defaller. Dessa enheter är också kända som FFUs (Free FallingUnits). Målet med detta projekt var att förvandla dessa enhetertill autonoma glidare genom att designa utfällbara vingar.En fjäderbelastad saxmekanism valdes som den huvudsakligautfällningsmekanismen. Vidare simulerades den konceptuellavingdesignen i Siemens NX och strukturen analyserades i NASTRAN.Slutligen tillverkades en prototyp för att bekräfta omsaxmekanismen skulle fungera som avsedd. De första simuleringsresultatenvisade sig vara lovande med rätt materialval.På grund av begränsningar i resurser, kunde inte prototypenjämföras med simuleringen. Baserat på prototypresultaten måstedesignen förstärkas eller ändras för att bli starkare och mer styv. / Kandidatexjobb i elektroteknik 2021, KTH, Stockholm

Existen muchos trabajos relacionados con el diseño y desarrollo de nodos sensores, donde se presentan gran variedad de aplicaciones. Las redes de sensores inalámbricos pueden facilitarnos y mejorar algunos aspectos de nuestra vida diaria. Es fácil, pensar que si este tipo de dispositivo es tan beneficioso para nosotros y para el entorno donde vivimos, su precio debería ser relativamente barato. Pero podemos comprobar que esto no es así. ¿Por qué estos dispositivos son tan caros? ¿Sería posible desarrollar dispositivos con las mismas capacidades y precios más económicos? ¿Cómo puedo fabricar mis nodos sensores de bajo coste? Esta tesis responde a estas preguntas y muestra algunas de las muchas aplicaciones que los nodos sensores pueden tener. En esta tesis hemos propuesto (e implementado en algunos casos) el desarrollo de nodos sensores para la monitorización del medio, a partir de dispositivos de bajo coste. Para la implementación de un nodo sensor, y en definitiva la red que une a todos estos nodos, es importante conocer el medio donde trabajarán. A lo largo de este documento se presentan las investigaciones llevadas a cabo para el desarrollo de sensores en tres ámbitos de aplicación. En el primero de ellos, se desarrollan dispositivos multisenores para la monitorización del medio. La aplicación de las redes de sensores inalámbricas al medio natural, precisa un estudio de cómo se ven afectadas las señales, en función de la distancia, vegetación, humedad del ambiente, etc. Focalizamos nuestros desarrollos en la verificación de incendios en zonas rurales y en el control de plagas en viñedos donde la detección precoz de estos eventos genera elevados ahorros económicos. También proponemos el desarrollo de una red de collares sensores para ganado domestico, que nos ayudará a reducir y prevenir en muchos casos, los ataques de lobos y hurtos de crías. Por último, dentro de este grupo, presentamos una red permite detectar anomalía de los materiales en edificios y red de sensores que nos permite monitorizar las personas mayores o deficientes, que se mueven junto con un grupo, en una excursión o actividad. El segundo grupo de aplicaciones, hace referencia a la monitorización de espacios en entornos de interior. Para ello hemos analizado el comportamiento de las señales inalámbricas en diferentes escenarios. Los resultados, nos han permitido extraer un nuevo método de diseño de las redes inalámbricas en interiores. Nuestro método, permite definir la mejor ubicación de los dispositivos de red y nodos sensores en interiores con un ahorro en el número de sensores del 15%. Por último, se presenta el estudio sobre las comunicaciones subacuáticas basadas en las ondas electromagnéticas donde analizamos la dependencia de las comunicaciones subacuáticas en agua dulce en función de la frecuencia, temperatura, tasas de transferencia de datos y modulación. Relacionado con el medio subacuático, presentamos 2 propuestas. La primera de ellas hace referencia a la implementación de una red de sensores para granjas marinas que nos permite reducir la cantidad de residuos depositados en el lecho marino y reducir el porcentaje de comida desperdiciada. La segunda propuesta es el desarrollo de dos sensores oceanográficos que nos permitirían controlar la cantidad de comida y heces depositadas en el suelo y controlar la turbidez del agua de manera muy simple y económica Todos estos desarrollos y propuestas, han estado precedidos por un exhaustivo estudio sobre los problemas energéticos que las redes de sensores inalámbricas presentan y las técnicas que pueden emplearse, para prolongar la vida útil de la red y mejorar su estabilidad. / There are many works related to the design and development of sensor nodes which present several applications. Wireless sensor networks can facilitate and improve some aspects of our daily lives. It is easy to think that if this type of device is so beneficial to us and to our environment, its price should be relatively cheap. But we can see that this is not true. Why these devices are so expensive? Would it be possible to develop devices with the same capabilities and lower prices? How can I make my low-cost sensor nodes? This dissertation answers these questions and shows some of the many applications that sensor nodes may have. In this dissertation, we propose (and implement in some cases) the development of sensor nodes for environmental monitoring, from low-cost devices. For the implementation of a sensor node and network which joins all these nodes, it is important to know the environment where they will work. Throughout this dissertation, we present the research carried out for the development of sensors in three main application areas. In the first of these areas, we present multisensor devices developed for environmental monitoring. The application of wireless sensor networks to the environment requires a study of how signals are affected depending on the distance, vegetation, ambient humidity, etc. We focus our developments on the fire detection in rural areas and on the control of pests in vineyards where the early detection of these events generates high economic savings. We also propose the development of a sensor network which will help us to reduce and prevent wolves¿ attacks and theft in livestock. Finally, within this group, we present a network to detect material anomalies in building and a sensor network which allows us to monitor the elderly or disabled people who move along with a group on a tour or activity. The second group of applications is related to the monitoring of spaces in indoor environments. For this, we analyze the behavior of wireless signals in different scenarios. These results allowed us to extract a new method for designing wireless networks in indoor environments. Our method allows defining the best location of network devices and sensor nodes indoors saving 15% of the sensors needed. Finally, we present a study on underwater freshwater communications based on electromagnetic waves, where we analyze the dependency of underwater communications as a function of working frequency, temperature, data transfer rates and modulation. Related to underwater environment, we present two proposals. First one refers to the implementation of a sensor network for marine farms which allows us to reduce the amount of waste deposited on the seabed and reduce the percentage of wasted food. The second proposal is the development of two oceanographic sensors which allow us to control the amount of food and feces deposited in seabed and the water turbidity control in a very simple and inexpensive way. All these developments and proposals have been preceded by a comprehensive study on the energy problems in wireless sensor networks. We have also presented several techniques which can be used to prolong the network lifetime and improve its stability. / Sendra Compte, S. (2013). Deployment of Efficient Wireless Sensor Nodes for Monitoring in Rural, Indoor and Underwater Environments [Tesis doctoral]. Editorial Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/32279