There currently does not exist a way for creating digital twins’information and transferring it between networks , but container-basedvirtualization could be a possible solution. One of those techniques isDocker, which is an engine to isolate a software and can bring benefits toimprove the workflow of software development. Making changes withDocker is very fast as it uses the copy-on-write model, it can containerizeapplications in minutes. This study will design a scenario with twodevices sending a data packet between each other to simulate theproblem. The results from the study is further investigate and analyze toanswer the question of whether the container-based virtualization can bea possible solution for creating digital twins. The result from the scenariois Docker works equal or worse when used with a low-cost computinghardware compared to a computing hardware. It is speculated that theresources used in the images is a factor that can affect the performance,but the hardware is also another factor that can affect it. / Det finns för närvarande inget sätt att skapa digitala tvillingar ochöverföra den mellan nätverk, men containerbaserad virtualisering kanvara en möjlig lösning. En av containerbaserad virtualisering tekniker ärDocker, som är en motor för att isolera en programvara och kanframbringa fördelar för att förbättra arbetsflödet för programutveckling.Att göra ändringar med Docker är mycket snabbt tack vare användningav copy-on-write-modellen. Denna studie kommer att utforma ettscenario med två enheter som skickar ett datapaket mellan varandra fratt simulera överföringsprocessen. Mätresultat från studien bliranalyserad för att besvara frågan om containerbaserad virtualisering kanvara en möjlig lösning för att skapa och skicka digitala tvillingar.Resultatet från scenariot är att Docker fungerar lika eller sämre när detanvänds med en låg kostnad datorhårdvara jämfört med endatorhårdvara. Det spekuleras att resurserna som används i datapaketetär en faktor som kan påverka prestandan, men hårdvaran är också enannan faktor som påverkar det.

Over the past 20 years, there were several low-cost airlines identified as the most successful airlines in Europe according to the number of transported passengers. Theoretical part of the thesis has several objectives. It is an analysis of the airlines success it selves as well as an analysis of their gradual development in low cost air travel within Europe and description of the low-cost aviation market in Europe in terms of the history and competitiveness. The practical part which is the main objective of the thesis is an overall analysis of the differences in business models of low-cost carriers and the impact of these differences on the development of their economic and operational performance.

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 / Alfresco

While worldwide the flight industry was increasing in the last decade, little is known about the working environment of pilots and flight attendants. This paper aims to develop a deeper understanding based on the theories of loyalty, self-loyalty, commitment, and motivation for pilots and flight attendants in the low-cost segment and the carrier segment in the flight industry. A qualitative study with a semi-structured interview is provided. In total, three pilots and three flight attendants who work for a low-cost airline and carrier airlines from all over the world were interviewed. The findings show that a differentiation between before the COVID 19 pandemic and during COVID 19 has to be made. Before COVID 19, pilots were almost satisfied with their working conditions whereas flight attendants felt their working conditions could have been improved in terms of better wages. However, during the COVID 19 time, both the flight attendants and pilots are afraid of losing their job. Due to COVID 19, many flights were cancelled which might have an impact on the flight industry in the future. My studies open up possibilities for new research in the future about the transformation of the flight industry after COVID 19.

abstract: One of the single-most insightful, and visionary talks of the 20th century, “There’s plenty of room at the bottom,” by Dr. Richard Feynman, represented a first foray into the micro- and nano-worlds of biology and chemistry with the intention of direct manipulation of their individual components. Even so, for decades there has existed a gulf between the bottom-up molecular worlds of biology and chemistry, and the top-down world of nanofabrication. Creating single molecule nanoarrays at the limit of diffraction could incentivize a paradigm shift for experimental assays. However, such arrays have been nearly impossible to fabricate since current nanofabrication tools lack the resolution required for precise single-molecule spatial manipulation. What if there existed a molecule which could act as a bridge between these top-down and bottom-up worlds? At ~100-nm, a DNA origami macromolecule represents one such bridge, acting as a breadboard for the decoration of single molecules with 3-5 nm resolution. It relies on the programmed self-assembly of a long, scaffold strand into arbitrary 2D or 3D structures guided via approximately two hundred, short, staple strands. Once synthesized, this nanostructure falls in the spatial manipulation regime of a nanofabrication tool such as electron-beam lithography (EBL), facilitating its high efficiency immobilization in predetermined binding sites on an experimentally relevant substrate. This placement technology, however, is expensive and requires specialized training, thereby limiting accessibility. The work described here introduces a method for bench-top, cleanroom/lithography-free, DNA origami placement in meso-to-macro-scale grids using tunable colloidal nanosphere masks, and organosilane-based surface chemistry modification. Bench-top DNA origami placement is the first demonstration of its kind which facilitates precision placement of single molecules with high efficiency in diffraction-limited sites at a cost of $1/chip. The comprehensive characterization of this technique, and its application as a robust platform for high-throughput biophysics and digital counting of biomarkers through enzyme-free amplification are elucidated here. Furthermore, this technique can serve as a template for the bottom-up fabrication of invaluable biophysical tools such as zero mode waveguides, making them significantly cheaper and more accessible to the scientific community. This platform has the potential to democratize high-throughput single molecule experiments in laboratories worldwide. / Dissertation/Thesis / Doctoral Dissertation Biomedical Engineering 2019

No description available.

An active, broadband antenna module amenable for use in low cost phased arrays is proposed. The module consists of a Vivaldi antenna integrated with a frequency conversion integrated circuit. A method of orthogonally mounting endfire antennas onto an array motherboard is developed using castellated vias. A castellated active isolated Vivaldi antenna package is designed, fabricated, and measured. An 8x1 phased array of castellated, active Vivaldi antenna packages is designed and assembled. Each element has approximately one octave of bandwidth centered in X-band, and each is mounted onto a coplanar waveguide motherboard. Radiation patterns of the array are measured at several frequencies and scan angles.

Thermal management has emerged as an important design issue in a range of designs from portable devices to server systems. Internal thermal sensors are an integral part of such a management system. Process variations in CMOS circuits cause accuracy problems for thermal sensors which can be fixed by calibration tables. Stand-alone thermal sensors are calibrated to fix such problems. However, calibration requires going through temperature steps in a tester, increasing test application time and cost. Consequently, calibrating thermal sensors in typical digital designs including mainstream desktop and notebook processors increases the cost of the processor. This creates a need for design of thermal sensors whose accuracy does not vary significantly with process variations. Other qualities desired from thermal sensors include low area requirement so that many of them maybe integrated in a design as well as low power dissipation, such that the sensor itself does not become a significant source of heat. In this work, we developed a process variation tolerant thermal sensor design with (i) active compensation circuitry and (ii) signal dithering based self calibration technique to meet the above requirements in 32nm technology. Results show that we achieve 3ºC temperature accuracy, with a relatively small design which compares well with designs that are currently used.

Yes / The need for the development of clean but still profitable processes and the study of low environmental impact and economically convenient management policies for them are two challenges for the years to come. This paper tries to give a first answer to the second of these needs, limited to the area of discontinuous productions. It deals with the development of a robust methodology for the profitable and clean management of (fed-)batch units under uncertainty, which can be referred to as a robust sustainability-oriented model-based optimization & control strategy. This procedure is specifically designed to ensure elevated process performances along with low-cost utilities usage reduction in real-time, simultaneously allowing for the effect of any external perturbation. In this way, conventional offline methods for process sustainable optimization can be easily overcome since the most suitable management policy, aimed at process sustainability, can be dynamically determined and applied in any operating condition. This leads to a significant step forward with respect to the nowadays options in terms of sustainable process management, that drives towards a cleaner and more energy-efficient future. The proposed theoretical framework is validated and tested on a case study based on the well-known fed-batch version of the Williams-Otto process to demonstrate its tangible benefits. The results achieved in this case study are promising and show that the framework is very effective in case of typical process operation while it is partially effective in case of unusual/unlikely critical process disturbances. Future works will go towards the removal of this weakness and further improvement in the algorithm robustness.

This research implemented a multiple case study design to investigate the effects of aesthetic and emotional labor in the premium airline context of Emirates, in comparison to the low-cost airline context of easyJet. This was achieved through the conduct of interviews with flight attendants from each airline as they are the frontline employees who are mostly concerned with the implementation of these standards. Even before the recruitment process employees are introduced to the requirements of aesthetic and emotional labor as airlines aim to find those who will best ‘fit’ their organizational culture, and that through training they will be even more equipped to represent the company during their interactions with customers. Thus, flight attendants are regarded as a strategic resource that contributes to the competitive advantage and organizational performance of airlines. Taking into consideration that aesthetic and emotional labor standards define the very nature of flight attendants’ job and that their performance determines the organization’s performance, the potential effects on their performance cannot be disregarded. The main themes that were yielded through the thematic analysis of the empirical findings were found to be parallel to some of the performance factors in Herzberg’s two-factor theory of motivation, while aesthetic and emotional labor were located as components within identified themes. Thus, this provided us with a general theoretical framework that allowed us to further discuss our findings in connection to relevant theory. Results showed that the different operational business models as well as the different cultures of each airline mostly contributed to the differences that were found in regard to the implementation of standards between the two contexts. Aesthetic labor standards were found to have a stronger effect on employees’ performance in the case of Emirates due to the fact their supervision was stricter. In both cases, aesthetic labor standards were not found to have an effect on employees' performance when it comes to their interaction with customers. While easyJet was found to receive a more diverse training when it comes to interaction with customers, in both cases emotional labor standards were found to have an overall positive link to employees’ performance not only when it comes to interaction with customers but also when it comes to dealing with co-workers, managers and the demands of the job in general. However, the aspect of personality was found to be a moderating factor influencing employees’ understanding and following of standards. It should be noted that the results of this research cannot be generalized. Further investigation across different contexts and airlines is suggested so as to conclude whether the results are representative of a specific context.