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Dahlberg, Daniel. "Developer Experience of a Low-Code Platform: An exploratory study." Thesis, Umeå universitet, Institutionen för informatik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176361.
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In recent years, low-code development has become increasingly popular, enabling developers to write less code and focus on the objective. However, while proven efficient, little attention has been given to how developers experience working in these development environments. This is significant as providing unpleasant experiences could reduce the benefits of low-code platforms by leaving the developers unhappy. As such, this study aims to gain an understanding of developer experience in low-code environments. The study was conducted with an IT-company recently specialized in low-code solutions, where participants were chosen based on having prior experience with low-code development. This ensued in interviews with six low-code developers as well as a project leader. Main positive experiences found were, feeling more productive, improved customer relations, focus on the objective, shared developer understanding, and quick learnability. Key negative experiences found were, having work constrained, limited freedom and creativity, inadequate documentation, and overview, and having poor and unsafe teamwork capabilities. To the best of my knowledge this is the first study to explore developer experience in low-code development environments and stands as groundwork for future studies in low-code developer experience.
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Andersson, Morris, and Oscar Lang. "Users perceptions about the usability of a LCDP mobile application." Thesis, Blekinge Tekniska Högskola, Institutionen för programvaruteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-21568.
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In the last two decades, software designed to solve specific tasks for its user has seen a big rise and not least of these are mobile applications. Low-code development platforms have over the last few years been introduced as an alternative that provides lower development times and costs. These low-code development platforms do however trade features and functionality to reach these lower costs. This could affect the usability of the platform's end products. The goal of this thesis is to identify usability issues in a mobile application developed in a LCDP, analyze existing usability guidelines for native mobile applications and propose new or adapted usability guidelines for low-coded mobile applications. To validate the gap in low-code development platform usability literature that led us to our initial problem statement we performed a literature review. Making use of individual interviews and focus groups we could produce the empirical data needed to identify potential user experienced usability issues within a low-code developed mobile application. We reviewed current native usability literature and found that most models, frameworks, and usability guidelines are in some way tied to the ISO 9241-11 standard. Individual interviews were held where we found that the overall experienced usability was positive. We then conducted seminars with focus groups which led to a thematic analysis. We summarized the quantitative data from the interviews and the qualitative data of the thematic analysis on the focus group seminars and then tied it to what we found in the literature review. Through our research, we found multiple areas of improvement in the application but the most discussed of these were that the users expected similar functionality to be presented in a similar fashion. With both the data from the literary analysis and empirical study we propose a new and adapted set of low-code usability guidelines with strong ties to the ISO 9241-11 standard and its core attributes.
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Hayosh, Daniel G. "Development of a Low-Cost Social Robotic Platform." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case156760134522865.
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Mendes, Diogo Dias. "WeRead - desenvolvimento de uma aplicação em low-code." Master's thesis, Instituto Superior de Economia e Gestão, 2019. http://hdl.handle.net/10400.5/19758.
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Mestrado em Gestão de Sistemas de Informação<br>O Mercado de plataformas móveis está em constante crescimento e evolução, de modo a que as empresas precisam de desenvolver novos softwares que sejam únicos e disruptivos, ou seja soluções piloto.
O objetivo deste trabalho é apresentar e explicar uma solução piloto para realizar leituras de contadores de água e eletricidade com um elevado grau de automoção, desenvolvido na Deloitte Portugal utilizando OutSystems.
De modo a apresentar os tópicos e metodologias utilizados neste projeto é apresentada uma revisão de literatura sobre os mesmos. Após a revisão de literatura, toda a solução e fases do projeto são descritas. Encerro este trabalho com uma conclusão onde falo sobre as dificuldades e considerações finais sobre o processo de desenvolvimento através de uma plataforma low-code e a minha satisfação com o resultado final.
O projeto consiste no desenvolvimento e implementação de duas aplicações, um portal web (BackOffice) e uma aplicação móvel (WeRead). A aplitação móvel permite ao utilizador realizar leituras de contadores de água e eletricidade através de um OCR (Optical Character Recognition). Contem uma UI/UX simples, de modo a que qualquer utilizador consiga ter uma boa experiência de utilização. A plataforma web está disponível para gestão de conteúdo e administração, onde se pode gerir todas as informações da base de dados.<br>The mobile market is constantly growing and evolving, so the companies must develop new software that is unique and disruptive, pilot solutions.
The purpose of this work is to present and explain a pilot solution to perform water and electricity readings with a high degree of automation that I developed on Deloitte Portugal using OutSystems, a low-code platform.
To introduce the topics and models that I used to do this project it is presented a literature review on those same topics. After the literature review, the solution, and every phase of the project, is presented and described.
I end this work with a conclusion, where I talk about the difficulties of the project, the final considerations on working with a low-code platform and my satisfaction with the project itself.
The project consists of the development and implementation of two applications, a web portal (BackOffice) and a mobile application, called WeRead. The mobile application allows the user to read water and electricity meters with an Optical Character Reader. It offers a simple UI/UX so that any user with any degree of technological literacy can have a good experience while using the application. The web platform is available for management and administration only, where they can manage every information on the database.<br>info:eu-repo/semantics/publishedVersion
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Mathew, Thomas J. "SCARAB : development of a rugged, low cost, inspection-class robotic platform." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/13757.
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This dissertation details the design and development of a prototype of a new robotic platform designed to carry a variety of sensors into environments that are too dangerous or confined for human workers, and forms part of a series of three concurrent M.Sc(Eng) dissertations which will integrate into a complete system. Ultimately this platform will be controlled and transported by the man-wearable harness and control station developed by W.K. Fong, and will gather data using the sensor payloads designed by G. Knox. Each dissertation, however, has independently quantifiable goals and results. An important application area for such a system is Urban Search and Rescue (USAR): the field of work concerned with the discovery, extrication, and treatment of survivors trapped in collapsed structures. These typically occur as a result of terrorist attacks, natural disasters, or engineering failure. Human workers, often assisted by dogs, are trained in this work but the danger of the working environments make USAR a key area where the use of robotic assistance can make a massive difference in helping to save lives - both those of rescuees and rescuers. A body of existing work, both in the commercial and academic spheres, has been done in this regard, and as a result there is much to be learned from the experiences of others. The history of robot-assisted USAR work, as well as the existing robots available, is surveyed and critically analysed. Significant challenges are noted: existing systems frequently lack sufficient mobility, are too large, difficult to transport and deploy, difficult to use, and very costly. Their cost has affected the prevalence of their use both as a barrier to acquisition but also during their use; robot operators frequently have their decisions constrained by the financial risk of losing or damaging a robot. Accordingly, it is proposed to develop a small, rugged, low-cost inspection-class robot that can be quickly and easily deployed in a variety of scenarios. This development work is covered in three sections; the mechanical and industrial design of the platform, its design, manufacture and assembly are considered first. This is followed by a description of the electrical and electronic systems needed to power and control the robot as it conducts inspections in challenging terrain. To protect the robot from damage in this terrain, impact-absorbing wheels are developed. The test-driven iterative design approach followed, as well as the equipment and methods used therein, constitute a large portion of this dissertation and are detailed in their own chapter which can be read as a sub-project within the main project. The finished prototype is tested against the developed specifications, and from these results conclusions are drawn and recommendations for future work made.
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Berglund, Dan. "Improving maintainability on modern cross-platform projects." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96003.
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As software systems grow in size they will also grow in complexity. If the increased complexity is not managed the system will be increasingly difficult to maintain. The effect of unmaintainable software is even more distinct when using a agile development process. By increasing the maintainability of the system these problems will be dealt with and the system can be extended with sustained efficiency. This thesis will evaluate the development process of a modern, agile company in order to find changes that will promote increased maintainability. The result is an modified process that will increase the maintainability with the smallest possible overhead for the development organisation. The result is based on earlier studies of development technologies that have proven to increase the maintainability. The implementation of these technologies are adjusted to fit the development team, and some of the technologies that are not suitable for the team are rejected.
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Knoebel, Robert, and Albert Berdugo. "“CAIS GROUND SUPPORT EQUIPMENT USING A LOW COST, PC-BASED PLATFORM”." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/607589.
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International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California<br>The Common Airborne Instrumentation System (CAIS) was developed under the auspices
of the Department of Defense to promote standardization, commonality, and
interoperability among flight test instrumentation. The central characteristic of CAIS is a
common suite of equipment used across service boundaries and in many airframe and
weapon systems.
The CAIS system has many advanced capabilities which must be tested during ground
support and system test. There is a need for a common set of low cost, highly capable
ground support hardware and software tools to facilitate these tasks.
The ground support system should combine commonly available PC-based telemetry tools
with unique devices needed for CAIS applications (such as CAIS Bus Emulator, CAIS
Hardware Simulator, etc.). An integrated software suite is imperative to support this
equipment.
A CAIS Ground Support Unit (GSU) has been developed to promote these CAIS goals.
This paper presents the capabilities and features of a PC-based CAIS GSU, emphasizing
those features that are unique to CAIS. Hardware tools developed to provide CAIS Bus
Emulation and CAIS Hardware Simulation are also described.
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Schwarz, Oliver. "No Hypervisor Is an Island : System-wide Isolation Guarantees for Low Level Code." Doctoral thesis, KTH, Teoretisk datalogi, TCS, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192466.
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The times when malware was mostly written by curious teenagers are long gone. Nowadays, threats come from criminals, competitors, and government agencies. Some of them are very skilled and very targeted in their attacks. At the same time, our devices – for instance mobile phones and TVs – have become more complex, connected, and open for the execution of third-party software. Operating systems should separate untrusted software from confidential data and critical services. But their vulnerabilities often allow malware to break the separation and isolation they are designed to provide. To strengthen protection of select assets, security research has started to create complementary machinery such as security hypervisors and separation kernels, whose sole task is separation and isolation. The reduced size of these solutions allows for thorough inspection, both manual and automated. In some cases, formal methods are applied to create mathematical proofs on the security of these systems. The actual isolation solutions themselves are carefully analyzed and included software is often even verified on binary level. The role of other software and hardware for the overall system security has received less attention so far. The subject of this thesis is to shed light on these aspects, mainly on (i) unprivileged third-party code and its ability to influence security, (ii) peripheral devices with direct access to memory, and (iii) boot code and how we can selectively enable and disable isolation services without compromising security. The papers included in this thesis are both design and verification oriented, however, with an emphasis on the analysis of instruction set architectures. With the help of a theorem prover, we implemented various types of machinery for the automated information flow analysis of several processor architectures. The analysis is guaranteed to be both sound and accurate.<br>Förr skrevs skadlig mjukvara mest av nyfikna tonåringar. Idag är våra datorer under ständig hot från statliga organisationer, kriminella grupper, och kanske till och med våra affärskonkurrenter. Vissa besitter stor kompetens och kan utföra fokuserade attacker. Samtidigt har tekniken runtomkring oss (såsom mobiltelefoner och tv-apparater) blivit mer komplex, uppkopplad och öppen för att exekvera mjukvara från tredje part. Operativsystem borde egentligen isolera känslig data och kritiska tjänster från mjukvara som inte är trovärdig. Men deras sårbarheter gör det oftast möjligt för skadlig mjukvara att ta sig förbi operativsystemens säkerhetsmekanismer. Detta har lett till utveckling av kompletterande verktyg vars enda funktion är att förbättra isolering av utvalda känsliga resurser. Speciella virtualiseringsmjukvaror och separationskärnor är exempel på sådana verktyg. Eftersom sådana lösningar kan utvecklas med relativt liten källkod, är det möjligt att analysera dem noggrant, både manuellt och automatiskt. I några fall används formella metoder för att generera matematiska bevis på att systemet är säkert. Själva isoleringsmjukvaran är oftast utförligt verifierad, ibland till och med på assemblernivå. Dock så har andra komponenters påverkan på systemets säkerhet hittills fått mindre uppmärksamhet, både när det gäller hårdvara och annan mjukvara. Den här avhandlingen försöker belysa dessa aspekter, huvudsakligen (i) oprivilegierad kod från tredje part och hur den kan påverka säkerheten, (ii) periferienheter med direkt tillgång till minnet och (iii) startkoden, samt hur man kan aktivera och deaktivera isolationstjänster på ett säkert sätt utan att starta om systemet. Avhandlingen är baserad på sex tidigare publikationer som handlar om både design- och verifikationsaspekter, men mest om säkerhetsanalys av instruktionsuppsättningar. Baserat på en teorembevisare har vi utvecklat olika verktyg för den automatiska informationsflödesanalysen av processorer. Vi har använt dessa verktyg för att tydliggöra vilka register oprivilegierad mjukvara har tillgång till på ARM- och MIPS-maskiner. Denna analys är garanterad att vara både korrekt och precis. Så vitt vi vet är vi de första som har publicerat en lösning för automatisk analys och bevis av informationsflödesegenskaper i standardinstruktionsuppsättningar.<br><p>QC 20160919</p><br>PROSPER<br>HASPOC
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Arifianto, Ony. "A Low-Cost Unmanned Aerial Vehicle Research Platform: Development, Modeling and Advanced Control Implementation." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/49301.
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This dissertation describes the development and modeling of a low-cost, open source, and reliable small fixed-wing unmanned aerial vehicle (UAV) for advanced control implementation. The platform is mostly constructed of low-cost commercial off-the-shelf (COTS) components. The only non-COTS components are the airdata probes which are manufactured and calibrated in-house, following a procedure provided herein. The airframe used is the commercially available radio-controlled 6-foot Telemaster airplane from Hobby Express. The airplane is chosen mainly for its adequately spacious fuselage and for being reasonably stable and sufficiently agile. One noteworthy feature of this platform is the use of two separate low-cost open source onboard computers for handling the data management/hardware interfacing and control computation. Specifically, the single board computer, Gumstix Overo Fire, is used to execute the control algorithms, whereas the autopilot, Ardupilot Mega, is mostly used to interface the Overo computer with the sensors and actuators. The platform supports multi-vehicle operations through the use of a radio modem that enables multi-point communications.
As the goal of the development of this platform is to implement rigorous control algorithms for real-time trajectory tracking and distributed control, it is important to derive an appropriate flight dynamic model of the platform, based on which the controllers will be synthesized. For that matter, reasonably accurate models of the vehicle, servo motors and propulsion system are developed. Namely, the output error method is used to estimate the longitudinal and lateral-directional aerodynamic parameters from flight test data. The moments of inertia of the platform are determined using the simple pendulum test method, and the frequency response of each servomotor is also obtained experimentally. The Javaprop applet is used to obtain lookup tables relating airspeed to propeller thrust at constant throttle settings.
Control systems are also designed for the regulation of this UAV along real-time trajectories. The reference trajectories are generated in real-time from a library of pre-specified motion primitives and hence are not known a priori. Two concatenated primitive trajectories are considered: one formed from seven primitives exhibiting a figure-8 geometric path and another composed of a Split-S maneuver that settles into a level-turn trim trajectory. Switched control systems stemming from l2-induced norm synthesis approaches are designed for discrete-time linearized models of the nonlinear UAV system. These controllers are analyzed based on simulations in a realistic operational environment and are further implemented on the physical UAV. The simulations and flight tests demonstrate that switched controllers, which take into account the effects of switching between constituent sub-controllers, manage to closely track the considered trajectories despite the various modeling uncertainties, exogenous disturbances and measurement noise. These switched controllers are composed of discrete-time linear sub-controllers designed separately for a subset of the pre-specified primitives, with the uncertain initial conditions, that arise when switching between primitives, incorporated into the control design.<br>Ph. D.
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Bajracharya, Max 1979. "Design and development of a high-performance, low-cost robotics platform for research and education." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/86798.
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Ashton, John A. "An efficient and low cost 3D compass gait biped an economical platform for control system development." Thesis, Wichita State University, 2011. http://hdl.handle.net/10057/4020.
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A compass gait biped is a theoretical model of a human that is physically walking. The
compass gait model is a 2D planer representation that simplifies the calculations required to
mathematically describe the human walking gait. The model assumes stability in the sagitial
plane and also ignores any ‘foot’ contact with the ground plane other than the time assigned and
positionally assigned Plant-Foot.
This thesis starts at and expands from the 2D compass gait model, firstly to a 3D
computer simulated model and secondly to a physical and operational 3D model. The computer
simulation is to provide proof of feasibility, demonstrate that it will be physically operational,
and to document its’ probable power requirements. The models’ purpose is to provide a platform
for a control system, such that the control system can control the 3D model with a resulting
human-like walking gait. The requirements for the 3D model/control system platform are that it
is efficient and extremely economical. It must be very simple to fabricate consisting primarily of
common ‘off the shelf’ parts and it must also be scaleable.
The completed 3D simulation model provided torque data, natural frequency data, and
operational proofing that enabled a virtual straightforward fabrication of the physical model.
The completed physical model walks in a manner that is a near mirror image of the simulated
model. It provides a working human gait simulation that can be easily controlled by an onboard control system and that by design requires minimal control.<br>Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering.
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Abbati, Luca. "Development of a Bi-Directional Electronics Platform for Advanced Neural Applications." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4271.
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This work presents a high-voltage, high-precision bi-directional multi-channel system capable of stimulating neural activity through bi-phasic pulses of amplitude up to ∓50 V while recording very low-voltage responses as low as tens of microvolts. Most of the systems reported from the scientific community possess at least one of the following common limitations: low stimulation voltages, low gain capabilities, or insufficient bandwidth to acquire a wide range of different neural activities.
While systems can be found that present remarkable capabilities in one or more specific areas, a versatile system that performs over all these aspects is missing. Moreover, as many novel materials, like silicon carbide, are emerging as biocompatible interfaces, and more specifically as neuronal interfaces, it becomes mandatory to have a system operating across a wide range of voltages and frequencies for both physiological and electrical compatibility testing. The system designed and proven during this doctoral research effort features a ∓50 V bi-phasic pulse generator, 62 to 100 dB of software selectable amplification, and a wide 18 Hz to 12 kHz bandwidth.
In addition to design and realization we report about biological testing consisting in the acquisition of neural signals from tissue cultures using an MEA where faithful signal recording was achieved with superior fidelity to a commercial system used to sample signals from the same culture. The only system parameter that was less robust than the commercial system was the noise level, which due to our higher bandwidth was somewhat expected. More importantly our custom electronics outperformed in terms of lower delay and lower cost of realization. All of these results plus suggested future works are listed for the reader's convenience.
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Pires, Carneiro Leonardo [Verfasser]. "Development of an Electrochemical Biosensor Platform and a Suitable Low-Impedance Surface Modification Strategy / Leonardo Pires Carneiro." Karlsruhe : KIT Scientific Publishing, 2014. http://www.ksp.kit.edu.
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Herrmann, Marc. "Development of a microfluidic immunoassay platform for the rapid quantification of low-picomolar concentrations of protein biomarkers." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=21988.
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The sensitive and specific detection of proteins is at the center of many routine analyses in fundamental research, medical diagnosis, food quality control and environmental safety. The current gold standard for these applications remains the laborious and costly microwell plate ELISA. Over the last decade, new miniaturized devices have emerged: microfluidic systems that can drastically reduce the costs and the time of analysis. Many approaches and designs have been proposed. However, some recurrent difficulties remain that prevent the achievement of a system with the necessary balance between scientific performance, cost-effectiveness and user friendliness. These limitations include the complexity to maintain a constant flow rate in a simple and repeatable fashion, to mix solutions in a laminar flow regime, to control undesired surface effects, and to connect the chip to external pumping instruments. This thesis describes a novel microfluidic immunoassay platform that addresses the aforementioned issues while also achieving highly sensitive parallel measurements for the rapid quantification of protein biomarkers. The development of this platform followed three consecutive stages: (i) the establishment of an initial design for the simple manipulation of solutions in stop-flow mode, and the elaboration of strategies for mixing and for the simultaneous detection of parallel reactions, (ii) the introduction of the concept of Dual Network system, which removes the need for channel passivation against the non-specific adsorption of proteins, and (iii) the optimization of the critical assay parameters for the quantification of the cytokine TNF-alpha. The main attributes of the developed platform are also presented: the straightforward fabrication process, the simplified flow control, the enzymatically generated fluorescent signal, and the multi-purpose use of magnetic beads. These microbeads were utilized as functionalized substrate to capture the analyte, but also to<br>La détection sensible et spécifique de protéines se trouve au cœur d'analyses de routine dans la recherche fondamentale, le diagnostique médical, le contrôle qualité de la nourriture et la sûreté environnementale. Le standard actuel pour ces applications est toujours le coûteux et laborieux test ELISA en micropuits. Au cours de la dernière décennie, de nouveaux dispositifs miniaturisés ont fait leur apparition : des systèmes microfluidiques pouvant réduire de manière drastique les coûts et les temps d'analyse. Plusieurs approches et designs ont été proposés. Cependant, certaines difficultés récurrentes entravent toujours l'avènement d'un système possédant l'équilibre nécessaire entre la performance scientifique, le maintient de coûts bas, et la facilité d'utilisation. Ces limitations incluent la complixité de fixer une vitesse de flot constante de façon simple et reproductible, de mixer des solutions en régime laminaire, de contrôler les effets de surfaces indésireux, et de connecter la puce à des instruments de pompage externes. Cette thèse décrit une nouvelle plateforme d'immunoessais microfluidiques, qui adresse les problèmes mentionnés tout en réalisant des mesures hautement sensibles et en parallèle pour la quantification de biomarqueurs protéiques. Son développement a suivi trois étapes consécutives : (i) l'établissement d'un design initial pour la manipulation aisée de solutions en mode stop-flow, l'élaboration de stratégies de mixage et de détection simultanée de réactions parallèles, (ii) l'introduction du concept de système Dual Network, qui supprime la nécessité de passiver les canaux contre l'adsorption non-spécifique de protéines, et (iii) l'optimisation des paramètres critiques de l'essai pour la quantification de la cytokine TNF-alpha. Les attribues principaux de la plateforme sont également présentés : le procédé de fabrication rapide, le contrôle du flot simplifié, le signal$
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Edwards, Jeremy, Jaroslav Janda, Megan Sweeney, et al. "Development and evaluation of a high-throughput, low-cost genotyping platform based on oligonucleotide microarrays in rice." BioMed Central, 2008. http://hdl.handle.net/10150/610235.
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BACKGROUND:We report the development of a microarray platform for rapid and cost-effective genetic mapping, and its evaluation using rice as a model. In contrast to methods employing whole-genome tiling microarrays for genotyping, our method is based on low-cost spotted microarray production, focusing only on known polymorphic features.RESULTS:We have produced a genotyping microarray for rice, comprising 880 single feature polymorphism (SFP) elements derived from insertions/deletions identified by aligning genomic sequences of the japonica cultivar Nipponbare and the indica cultivar 93-11. The SFPs were experimentally verified by hybridization with labeled genomic DNA prepared from the two cultivars. Using the genotyping microarrays, we found high levels of polymorphism across diverse rice accessions, and were able to classify all five subpopulations of rice with high bootstrap support. The microarrays were used for mapping of a gene conferring resistance to Magnaporthe grisea, the causative organism of rice blast disease, by quantitative genotyping of samples from a recombinant inbred line population pooled by phenotype.CONCLUSION:We anticipate this microarray-based genotyping platform, based on its low cost-per-sample, to be particularly useful in applications requiring whole-genome molecular marker coverage across large numbers of individuals.
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Spengler, Alison Elizabeth. "Sequence Development on a Sediment-Starved, Low Accommodation Epeiric Carbonate Ramp: Silurian Wabash Platform, USA Mid-continent During Icehouse to Greenhouse Transition." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/44529.
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A study of 12 cores and 2 wells with cuttings through the Silurian (444 to 416 m..y.) succession of the Wabash Platform, Indiana was done to establish the high resolution sequence stratigraphy of a sediment-starved low-latitude epeiric sea platform during the transition from Ordovician icehouse to Devonian greenhouse. The Wabash Platform (approximately 200,000 square km area) is bounded to the north by the Michigan Basin, to the east by the Appalachian Basin, and passed to the southwest into the Vincennes Basin, which was open to the ocean.
Facies developed include: crinoidal grainstone-packstone sheets (updip shoals), buildup facies (stromatactis wackestone - lime mudstone, below storm wave-base settings; stromatoporoid skeletal wackestone - floatstone, storm wave-base to fair-weather wave-base; and crinoidal rudstone to packstone; flank facies); non-cherty, skeletal packstone, wackestone, mudstone (sub-fair-weather- to storm wave-base); and cherty, skeletal wackestone - mudstone and variably argillaceous carbonate mudstone (below storm wave-base).
Eight thin sequences (1.3 to 4 m.y. duration) occur and range from 2 m to 10 m, with the upper two sequences up to 20 m downdip; most of the sequences can be correlated to global cycles. Except for the lower three disconformity-bounded sequences, most sequences are relatively conformable and lack well defined sequence boundaries or subaerial exposure surfaces. The most easily mapped surfaces are the transgressive surfaces, given that the correlative conformities are cryptic. Lowstand system tracts probably include downdip grainy facies and the deep ramp seaward of updip late highstand deposits. Transgressive systems tracts are upward deepening, upward fining carbonate units, some of which become more argillaceous and silty upward. This contrasts with the usual association of clastic-prone units with lowstand to early transgressive systems tracts. Highstand systems tracts are subtly upward coarsening from carbonate mudstone to skeletal wackestone/packstone and rarely skeletal grainstone. During deposition of the uppermost two sequences, mudmound barrier banks grew upward into shallow water buildups to form a discontinuous raised rim (40 m relief) to the ramp.
Even though subsidence rates were very low (<1 cm/k.y.), the low sedimentation rates (0.3 cm/k.y. to 0.8 cm/k.y.) generally prevented the seafloor from building to sea level except for the basal three sequences in which Early Silurian third order glacio-eustacy generated disconformable boundaries. Thus the ramp remained subtidal through most of the relatively ice-free greenhouse later Silurian except over the buildups which locally shallowed to sea level. Parasequence development in high accommodation settings elsewhere in North America are compatible with the transition from moderate ice-sheets to an ice free world. However, this is poorly expressed on the Wabash Platform due to the dominantly deeper subtidal setting. The Silurian provides a window into climate change from a global cool period to global hothouse, which may have implications for understanding future climate change.<br>Master of Science
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McAdams, Ian. "DEVELOPMENT OF A DISCRETE COMPONENT PLATFORM TOWARDS LOW-POWER, WIRELESS, CONDUCTIVITY-CORRECTED, CONDUCTANCE-BASED BLADDER VOLUME ESTIMATION IN FELINES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1560442028426129.
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Anton, Andersson, and Johan Runbert. "Cross-platform Mobile Development and Internet of Things : Developing a cross-platform mobile application using web technologies to interact with smart things." Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-48517.
Full textAbstract:
Today more and more objects in our daily lives are getting connected to the Internet. This phenomenon is called the Internet of Things and is a way for physical things such as cars, buildings or even bus stations to get access and communicate with other objects using the Internet. The problem is that for every Internet of Things device, an application is often needed in order to communicate with these devices. Developing mobile applications in a separate programming language for each operating system can be an expensive and time consuming task. In this thesis, we implement and evaluate a cross-platform mobile solution for users to interact with smart things using the advantages of web technologies. To compare previous findings in this area, two literature reviews has been performed to find out which is the state of the art on cross-platform mobile development frameworks and smart-things technologies used for interacting with physical objects. The result is a mobile application developed using PhoneGap and jQuery Mobile that interacts with iBeacons, where students inside a university building can get directions and schedules for different rooms. The application received good results from a couple of usability studies, and performed well when measuring its performance. The outcome shows that web technologies that exist today are a viable solution to native mobile applications in terms of interacting with smart things such as tagging technologies.
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Alm, Agnes, and David Mellheden. "Skapa appar där det glappar : En fallstudie om uppfyllelse av verksamhetsbehov och anpassning av affärssystem med hjälp av en low-code BPM-plattform." Thesis, Linköpings universitet, Informatik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-165989.
Full textAbstract:
Många verksamheter använder idag affärssystem för att styra sin verksamhet, stötta processer och hantera sin information. Affärssystem är från grunden generiska system som är ämnade att passa många olika typer av verksamheter. Denna generiska utformning gör att verksamheter bygger upp anpassningsbehov, något som inte är helt okomplicerat att hantera. Att det är kostsamt och komplext att uppfylla anpassningsbehov genom att utveckla anpassningar i affärssystemet är väl studerat och forskning hävdar ofta att verksamheten istället borde anpassa sig till affärssystemet vid implementering. Faktorer som en snabb teknisk utveckling, nya marknadsförutsättningar och förändringar inom verksamheten gör ändock att behov kan förändras och uppstå över tid. Likaså har nya verktyg utvecklats för att bistå verksamhetsspecifika behov, varav low-code BPM-plattformen är en sådan. Low-code BPM-plattformar kan ses som utvecklingsverktyg för fristående applikationer och integrerade lösningar som används för att uppfylla verksamhetsbehov. Genom en fallstudie undersöker vi hur low-code BPM-plattformar används som ett alternativt sätt för att uppfylla anpassningsbehov av affärssystem samt vilka typer av verksamhetsbehov som kan uppfyllas med en sådan plattform. I studien har fyra intervjuer och en artefaktstudie genomförts vid ett svenskt IT-tjänsteföretag som erbjuder lösningar utvecklade genom deras low-code BPM-plattform. Studiens resultat visar att low-code BPM-plattformar kan användas som självständiga applikationer, integrationsmotorer och inbäddade i affärssystemets gränssnitt. Lösningar utvecklade genom en low-code BPM-plattform har ett tydligt fokus på slutanvändare. I studien har verksamhetsbehov om mobilåtkomst till affärssystem, anpassade processer utefter den enskilda verksamhetens existerande arbetssätt, ökad tillgång till information, styrande och guidande användargränssnitt och förbättrat samarbete, identifierats.<br>Many businesses today use enterprise resource planning systems (ERP) to handle their processes and information. ERP systems are generically designed to be able to fit a wide range of businesses. This generic composition creates a customization need, something that is not always so easy to handle. To customize ERP system is through research well known to be a both costly and complex task, several studies suggest the business should adapt to the system instead. From factors such as a rapid technical development, shifts in the market, and internal changes within the organization, need for change can arise over time. Likewise, new tools have been developed to meet business specific needs, such as the low-code BPM platform. Low-code BPM platforms can be seen as development tools for stand-alone applications and integrated solutions to be used to meet business needs. With a case study, we investigate how a low-code BPM platform can be used as an alternative for ERP customization, as well as what types of business needs a low-code BPM platform can meet. The study includes four interviews and an artifact study at a Swedish IT service company, who offer customers solutions developed through their low-code BPM platform. The results show low-code BPM platforms to be used as stand-alone applications, integration engines, or embedded in the ERP interface. Solutions developed on a low-code BPM platform have a clear focus on end-users. The study identifies business needs of mobile access to ERP-system, customization of processes according to existing business operations, increased access to information, guiding user interfaces, and improved collaboration
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Bäckström, Madeleine, and Nicklas Silversved. "Digitalizing the workplace: improving internal processes using digital services : A process improvement by digitalization, emphasizing chosen quality factors." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-177003.
Full textAbstract:
In recent years, the number of digital services and tools available has increased rapidly. When companies want to digitalize their business, they have the opportunity to browse a large number of existing platforms and applications available on the market to find a good match for their specific needs. However, when a company wishes to digitalize a work task that already has a well-established workflow, problems may arise. Due to this, a tailored digital solution may in some cases be the better suited option, rather than the ones available on the market. The intention of this work was to investigate the challenges that companies face in relation to digitalization of the workplace in general, and the challenges of a company’s expense management process in particular. As an example of how a workplace digitalization can take place, a collaboration with a forest industry company was conducted. An evaluation of their analog and internal expense management process was done, where the found challenges were assessed with respect to chosen quality factors. The evaluation and the found challenges regarding digitalization constituted the basis for a process mapping and a digital solution aiming to improve the company’s expense management process. The resulting work emphasizes how a digital solution can be tailored with simple means within a limited time frame, taking specific needs and existing challenges into account in order to digitalize the workplace. In addition, the work presents what challenges that exists within the concept of digitalizing the workplace and regarding expense management, and how quality factors can be used in combination with a process improvement in order to relieve and eliminate them.
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Nakazato, Anderson Zenken. "Desenvolvimento de máquina universal de ensaios mecânicos portátil de baixo custo para fins didáticos utilizando o conceito open-source. /." Guaratinguetá, 2019. http://hdl.handle.net/11449/181723.
Full textAbstract:
Orientador: Luis Rogerio de Oliveira Hein<br>Resumo: Neste trabalho é apresentado o projeto e construção de uma Máquina Universal de Ensaios Mecânicos portátil, didática, de baixo custo, fácil construção seguindo a filosofia open-source com o intuito de dar suporte ao ensino de Mecânica e Resistência do Materiais. O equipamento foi projetado para ser construído com perfis modulares de alumínio e executado em uma oficina de ensino técnico em mecânica. A máquina é capaz aplicar de forma segura um carregamento máximo de 10 kN tanto em tração quanto em compressão, se mover em velocidades que variam de 0,5 a 70 mm/min com uma resolução no deslocamento de 0,57 μm a um custo total de US$ 1,000.00 incluindo material e fabricação. A máquina é controlada por uma placa Arduino® UNO, opera com acionamento eletromecânico, a aplicação de carga é feita por meio de fusos trapezoidais, a aquisição do deslocamento e velocidade da trave é feita por codificadores de quadratura e o controle de velocidade é feito por controle (Proporcional, Integral e Derivativo) PID e é capaz de realizar ensaios de tração, mas pode ser adaptada para outros ensaios como compressão, flexão e dobramento, entre outros.<br>Abstract: In this work is presented the design and construction of an easy to build low-cost portable Universal Testing Machine for educational purposes using the open-source philosophy. The intention of this project is to support the teaching in the subjects of Mechanics and Mechanics of Materials. The hardware was designed to be constructed with modular aluminum profiles and built in a conventional Mechanics Technical and Vocational Education and Training Laboratory. The machine can apply safely a maximum load of 10kN in both, traction and compression, move precisely in a range of speed from 0.5 to 70 mm/min with a resolution of 0,57 μm in a total cost of US$ 1,000.00 including necessary material and fabrication. The machine is controlled by an Arduino® UNO board, operated with an electromechanical activation. The loading is applied by trapezoidal lead screws, the displacement and speed acquisition are done by quadrature encoder and the speed is controlled by Proportional, Integral and Derivative (PID) control, it is capable do perform tensile tests, but may be adapted to other tests like compression, flexure and bending, and others.<br>Mestre
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Gonçalves, João Ricardo Alpoim. "A model for widget composition in the OutSystems Platform." Master's thesis, 2019. http://hdl.handle.net/10362/125332.
Full textAbstract:
Developers use visual programming languages for faster development of user interfaces
due to better ease of use, readability, component reusability – widgets –, and an
instant preview of the desired effects. However, the most common composition models
to form user interfaces are black-box: combine existing widgets to form new widgets, but
generally do not allow indiscriminate modification of their internal components.
The OutSystems platform provides a What You See Is What You Get (WYSIWYG) experience
where developers can build user interfaces by assembling user interface elements
from predefined building blocks: the more fundamental and native components (widgets)
represent HTML elements, and custom-made building blocks (web blocks) represent
reusable compositions. However, web blocks and widgets are not uniform. Currently,
through some workarounds, creators can define compositions that, after instantiated,
their inside components can be customizable by other developers, but they either do not
follow OutSystems’ good practices for creating web applications, do not show the user’s
customizations – no preview –, or need expertise that citizen developers do not have.
Our objectives with this work are to develop a new composition model for user interface
components that allows to customize the properties of the inner elements of reusable
compositions at the places where they are instantiated, integrate the model with the platform
in a visual and interactive way where creators can control what can be modified,
and users can customize respectively while getting a consistent preview.
Reusable compositions in the OutSystems language are unique and static. Thus, for
developers to be able to change internal components of a composition and get a preview
of that change, the underlying models must explicitly receive and transmit properties of
the components internal state to the composition elements.
The work was validated by usability testing and by comparison between our solution
with widgets that are specialized by OutSystems for specific use cases. The new presented
approach is faster and more intuitive to use than what is currently offered by OutSystems.
We also observed it works best in tandem with mechanisms already in place (e.g., input
parameters) to offer more complete reusable compositions.
In the end, all objectives were met, providing a working solution which enables users
to customize their or other’s web blocks. With this work, reusable composition creators
and users will get more control, customization possibilities, and user experience more
intuitive, increasing productivity and user satisfaction.<br>Os programadores usam linguagens de programação visual para um desenvolvimento
mais rápido das interfaces de utilizador devido à maior facilidade de uso, legibilidade,
reutilização de componentes – widgets – e uma visualização instantânea dos efeitos desejados.
No entanto, os modelos de composição mais comuns para formar interfaces de
utilizador são black-box: combinam os widgets existentes para formar novos widgets, mas
geralmente não permitem modificações indiscriminadas dos seus componentes internos.
A plataforma OutSystems fornece uma experiência What You See Is What You Get
(WYSIWYG), na qual os programadores podem criar interfaces de utilizador ao montar
elementos da interface de utilizador a partir de blocos de construção predefinidos: os
componentes mais básicos e nativos (widgets) representam elementos HTML e blocos
de construção personalizados (web blocks) representam composições reutilizáveis. No
entanto, web blocks e widgets não são uniformes. Atualmente, por meio de soluções alternativas,
os criadores podem definir composições que, após instanciadas, os componentes
internos podem ser customizados por outros programadores, mas estas não seguem as
boas práticas da OutSystems para criar aplicações Web, não mostram as customizações
do utilizador – sem preview –, ou são necessários conhecimentos que os programadores
podem não possuem.
Os nossos objetivos com este trabalho são desenvolver um novo modelo de composição
para componentes da interfaces de utilizador que permita customizar as propriedades
dos elementos internos das composições reutilizáveis nos locais em que são instanciadas,
integrar o modelo à plataforma de maneira visual e interativa, onde os criadores podem
controlar o que pode ser modificado e os utilizadores podem customizar respectivamente
enquanto obtêm uma visualização consistente.
As composições reutilizáveis na linguagem OutSystems são únicas e estáticas. Assim,
para que os programadores possam alterar os componentes internos de uma composição
e obter um preview dessa alteração, os modelos subjacentes devem receber e transmitir
explicitamente propriedades do estado interno dos componentes para os elementos da
composição.
O trabalho foi validado através de testes de usabilidade e comparação entre a nossa
solução e com widgets especializados pela OutSystems para casos de uso específicos. A
nova abordagem apresentada é mais rápida e mais intuitiva para usar do que o modelo
de composição que é atualmente oferecido pela OutSystems. Também observámos que
é mais eficiente usar em conjunto com os mecanismos já existentes (e.g., parâmetros de
entrada) para oferecer composições reutilizáveis mais completas.
No final, todos os objetivos foram alcançados, fornecendo uma solução funcional que
permite aos utilizadores customizar os seus web blocks ou os de outros. Com este trabalho criadores e utilizadores de composições reutilizáveis terão mais controlo, possibilidades
de customização e experiência do utilizador mais intuitiva, aumentando a produtividade
e a satisfação do programador
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Ma, Jia-ming, and 馬家茗. "Low-cost and cross-platform robot development environment." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/30966981446958022796.
Full textAbstract:
碩士<br>國立屏東教育大學<br>資訊科學系<br>99<br>This paper designed a development environment system, with the concept of simplifying the Pioneer robot system. We achieved the features of cross-platform and cross-language using Python. And this system included three parts: data manager, module manager, and event manager to manage information, modules, and events.
This development environment communicated with each robot and device through the connection modules, thus the robot does not require any specific hardware other than the communication channel. Developers can monitor the status of the robot via the custom interface. Before the development of the robot module functions, the robot must have the connection device and protocol installed. This system allows developers to extend their own function modules, or build associations with the existing modules to save time required for development.
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LI, WEI-LUN, and 李偉綸. "The Low-cost High-performance Development Platform for Digital Servo." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/73743141668702591253.
Full textAbstract:
碩士<br>義守大學<br>電子工程學系<br>103<br>Robot, remote vehicle, telemeter and remote control system are applied to new heights of study, and the servo is one of the main components. The research talks about digital steering engine motor development platform that used high-performance and low-cost value to create a market economy. In the modern age of advanced technology, the automatic control and adjust the accuracy is the direction of the thesis. Digital steering engine motor is more high accuracy and fast frequency than tradition motor. Motor driving is the main driving applications of civil aircraft machine, robotic arm and telemetry carrier. Automatic control servos have more advantages than the traditional manual control motor: coordinate the backhaul of current value make motor increases the stability and fast response. Automatic servo motor control is flexible, it not only let automatic machine to achieve accurate angle in any different environment by the current loop, voltage loop, PWM and other parameters, but also optimize performance generation efficiency when the motor control can achieve high flexibility and response to emergencies capacity.
In this thesis, we proposed the use of Microprossor Control Unit HT66FU50 and HT66FM2240 as the main components of the system control circuit to construct digital servo development platform. HT66FM2240 through the H-Bridge outputs to control servo motor, then through the position loop with current loop closed-loop design to monitor the current of motor load and position changes. In order to facilitate control of the motor to achieve the highest accuracy and high performance, the program algorithms to identify the correct position when the motor running. Friendly designed human machine interface, a main MCU, HT66FU50, is used. Work focuses on the design and comes up with all applicable market servo motor development platforms. In this way, will be able to omit servo motor developers a lot of time and labor costs.
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Huang, Yan-Pin, and 黃彥斌. "Development of Low Temperature Cu Bonding and Heterogeneous Integration Platform." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/y2b7ft.
Full textAbstract:
博士<br>國立交通大學<br>電子研究所<br>105<br>This dissertation focuses on researches of three-dimensional integrated circuit, including development of key technologies and using technologies for the construction of heterogeneous integration platform. Studies focus on the physical mechanism of bonding technology and its applications, including two parts: (1) ultra-low temperature metal bonding technology, and (2) development of the heterogeneous integration platform through polymer bonding. The newly developed bonding technology can solve several current bottlenecks, such as thermal budget and spacing miniaturization. On the other hand, the proposed heterogeneous integration platform can be applied to various micro-electromechanical systems and different substrates.
In low temperature metal bonding, this study used the transient liquid phase connection as the starting material. The metal with low melting point - indium and tin were used as the bonding medium. Bonding temperature was set between 160 °C and 220 ° C. In thermal compression bonding method, the relationship between the bonding parameters (temperature, pressure, and time) and the bonding strength was further discussed through shear tests. After a series of experimental results, in the case of thermal compression bonding, it was found that bonding temperature and bonding time are not the dominant factors. The dominant factor may be the existence of surface oxide layer. Since ultrasonic vibration could remove surface oxide layer, the experimental structure was tested through ultrasonic-assisted bonding. As the results, the bonding strength was improved significantly.
Further, in comparison to transient liquid phase, solid-state film bonding can have fewer process steps, higher density, and smaller pitch. In this study, a surface passivation layer was used to protect copper from oxidation. A low temperature bond was achieved because of the passivation layer. At first, in the selection of passivation layer, diffusion behavior between different passivation layers and Cu was investigated by means of energy consumption in both self-diffusion and inter-diffusion: (1) surface self-diffusion, (2) interior bulk self-diffusion, (3) vacancy formation energy, (4) inter-diffusion through interstitial, and (5) inter-diffusion through substitution.
Finally, Ti and Pd were used as the passivation layer for following Cu-to-Cu bonding test and electrical analysis. Cu layers with Ti and Pd passivation were successfully bonded at 180 °C and 150 °C, respectively. Kelvin structure was used to carry out electrical measurement and reliability test. Electrical results showed good consistency in the resistance values, which proved that the structure has good endurance against environmental degradation.
In the second part of this dissertation “chip-level heterogeneous integration platform”, chip-level post process was demonstrated to achieve heterogeneous integration platform of diced chips. This study proposes a carrier wafer made by dry film lithography, which allows multiple dummy chips to implement lithography, silicon perforation, metal wiring and other wafer-level process validation. Finally, the vertical connection of the heterogeneous integrated chip can be achieved.
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Chen, Hao, and 陳皓. "Low-cost Embedded Wi-Fi Platform Development for Internet of Things." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/e7b43t.
Full textAbstract:
碩士<br>國立中央大學<br>資訊工程學系<br>103<br>Recent years, the rapid development of Internet of Things (IoT) make the huge revolution of the Internet. All things in the IoT make themselves recognizable and they obtain intelligence by making or enabling context related decisions. This transformation is concomitant with the emergence of wireless sensor network and the transition of the Internet towards IPv6 with an almost unlimited addressing capacity. For connecting the objects around people into Internet, the number of connectivity requirement will increase. In order to the vision of widely used, such as Smart Mobility, Smart Home, Smart Buildings, even Smart Cities, the communication platform should be low price and safety.
Therefore, we propose an Embedded Wi-Fi architecture to satisfy the vision of connectivity. In the proposed architecture, we use low-cost SPI-based interface to communicate between a low-power Wi-Fi chip and an inexpensive Micro Controller Unit (MCU). We balance the workload and the resource, such as code, storage, and address register, between Wi-Fi chip and MCU, and complete Wi-Fi functions in limited hardware resource. Moreover, the response time of tasks is in real time.
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Pulido, Nuno Miguel André. "Applying Behavior Driven Development Practices and Tools to Low-Code Technology." Master's thesis, 2019. http://hdl.handle.net/10362/92297.
Full textAbstract:
One of the main reasons software projects fail is the lack of communication between
stakeholders. Low Code Platforms have been recently growing in the software development
market. These allow creating state-of-the-art applications with facilitated design
and integration, in a rapid development fashion and as such, avoiding communication
errors among stakeholders is indispensable to avoid regressions. Behavior-Driven Development
(BDD) is a practice that focuses on developing value-based software, promoting
communication by bringing business people into development.
The BDDFramework is an open-source testing automation framework within the Out-
Systems environment. It allows describing test scenarios using the Gherkin syntax but it
is not focused on enabling the BDD process. Our main challenge is: - How can we apply
the BDD process in Low Code and support it from a technological point of view, considering the
particularities of Low Code environments and having as case study the OutSystems platform?
Is the BDDFramework prepared for this?
We interviewed some people in the domain to understand their development and testing
challenges and their experience with the BDDFramework. With the information gathered
and after studying other existing BDD process supporting tools for other languages,
we built a prototype that uses the existing BDDFramework and automates it, allowing
scenarios to be described in text files, which helps the introduction of business people in
the process. The prototype generates all the test structure automatically, reusing equal
steps while detecting parameters in the Gherkin descriptions.
We performed some real user testing to validate our prototype and we found that our
solution was faster, easier, with better usability and we obtained more correct tests than
with the previous approach - the BDDFramework alone.
Testing in Low Code is still an area with a lot to explore and errors have a huge impact
when development is very accelerated, so as communication errors tend to decrease we
can start building software even faster and this is what BDD proposes to solve. With this
prototype we have been able to demonstrate that it is possible to build a framework that
will allow us to enable this process by taking advantage of the OutSystems language particularities
to potentiate the BDD practice technologically, while setting a test standard
for the OutSystems language.
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Almeida, Ana Catarina Miranda. "Development of a platform for generation of icon-based graphic codes." Master's thesis, 2020. http://hdl.handle.net/10316/92541.
Full textAbstract:
Dissertação de Mestrado Integrado em Engenharia Electrotécnica e de Computadores apresentada à Faculdade de Ciências e Tecnologia<br>Códigos Lidos por Máquinas ( Machine-Readable Codes - MRC) têm sido usados para diversas finalidades ao longo dos anos, e abordagens clássicas como o código de barras ou o código QR podem ser vistas frequentemente no nosso dia-a-dia. Contudo, mais recentemente, um novo MRC foi criado com a capacidade de juntar o poder de comunicação dos métodos clássicos com uma melhoria significativa na estética e na capacidade de codificação. Este método é designado por UniQode.O UniQode possui duas grandes vantagens sobre os MRCs clássicos: estética e maior capacidade de codificação. Consequentemente, abre novas possibilidades para diversas finalidades, como identificação de produtos, rastreamento, marketing e comunicação vendedor-comprador. Esse novo método MRC é composto por vários elementos, sendo um deles o Código Gráfico (Graphic Code - GC). Este elemento pode ser criado de duas formas diferentes, com pixéis ou com ícones, ou por vezes com ambos.O GC baseado em pixéis foi amplamente estudado e os seus resultados serão apresentados neste documento. No entanto, o GC baseado em ícones ainda representa um novo conceito, com um método de criação não estruturado.Nesta dissertação, o trabalho proposto abrange não só a formalização do método de geração de GC baseado em ícones, mas também a criação de uma ferramenta para este processo de codificação, de modo de agilizar esta operação e gerar a respetiva documentação formal.Com a realização do trabalho proposto, a industrialização deste tipo de código torna-se possível e é facilitada, e o trabalho futuro nesta área é ampliado. Esse trabalho engloba, por exemplo, o desenvolvimento de uma ferramenta de decodificação correspondente, o aprimoramento das funções deste projeto, entre outros aspetos.<br>Machine-Readable Codes (MRC) have been used for several purposes over the years and classic approaches like the bar code or the QR Code can be seen everywhere in our day-to-day. However, more recently, a new MRC was created with the ability to combine the communication power of classical methods with a meaningful improvement on aesthetics and data capacity. This method is named UniQode. The UniQode has two major advantages over classical MRCs: aesthetics and larger coding capacity. Consequently, it opens new possibilities for several purposes such as product identification, tracking, marketing and seller-buyer communication. This new MRC method is composed by several elements, one of them being the Graphic Code (GC). This element can be created in two different ways, either with pixels or with icons, or, sometimes, both.The pixel-based GC has been extensively researched and its accomplishments will be presented in this document. However, the icon-based GC still represents a new concept with a mostly unstructured creation method.In this dissertation, the proposed work encompasses not only a formalisation of the generation method for icon-based GC, but also the creation of a tool for this type of encoding process, in order to quicken this operation while also generating its formal documentation.With the achievement of the proposed work, the industrialisation of this type of code is made possible and facilitated, and future work on this area is widened. Such work could comprise the development of a corresponding decoding tool, the enhancement of this project's tools abilities, among other aspects.
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Addokhi, Abdurrahman. "A versatile low-cost microcontroller-based 4-channel potentiostat platform for electrochemical biosensor development." Thesis, 2019. https://hdl.handle.net/2144/36031.
Full textAbstract:
Electrochemical biosensors provide high specificity of analyte detection in different body fluids. A potentiostat is the instrument used to control the applied potential and measure current flow in the electrochemical cell, where the analyte detection reaction occurs. Advances in electronics and microcontrollers have enabled such sophisticated
instruments to be built at a very low cost with sufficient performance.
We report the analysis, design, and prototyping of a low-cost 4-channel potentiostat that is fully integrated into one PCB connected to an Arduino Uno board, as an Arduino shield, which could be used for both biosensor development and applications. As an Arduino-based instrument, the MATLAB-based software of the potentiostat is relatively easily modified for different biosensor requirements, providing great versatility for end users. We believe that this design will be valuable for electrochemical biosensors researchers as well as students interested in electrochemistry. The reported low-cost architecture could also be adopted to create low-cost diagnostic instruments for resource-limited settings.
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Chen, Po-Chih, and 陳柏志. "Development of Low Temperature Copper to Copper Bonding Technology Platform for 3D Integrated Circuits." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/3jyj2p.
Full textAbstract:
碩士<br>國立交通大學<br>電子研究所<br>107<br>In recent years, because the shrunk-size of transistors are approaching the physical limits, the semiconductor industry urgently requires some new technologies to expand the Moore’s law, promote the industry progress, increase the production capacity, and reduce process costs. The development of three-dimensional integrated circuit (3D IC) technology has the following advantages: short RC delay, small form factor, low power consumption, low process cost and good system performance. In view of this, 3D IC technology has been widely researched and developed to date, and one of the most important technologies for 3D IC application is the bonding technique. Among the bonding technique, the most widely used method is thermal compression bonding (TCB). The TCB technology is generally utilized as the wafer/chip level stacking process. It is mainly responsible for interconnecting between the upper and lower chip/wafer after bonding process, and the main conduction of the interconnection is through the copper to realize the vertical transmission of signals. However, in order to improve the bonding yield, the conventional TCB needs to raise the bonding temperature more than 300°C. Therefore, it is easy to cause the higher thermal budget in the process, and then it will accompany with various problems, such as the deterioration of circuit performance, the deviation of alignment accuracy, wafer warpage and thermal stress. The focus in this thesis is to study the optimization of the thermal compression bonding technology for 3D integration application, aiming to develop a platform is suitable for copper-to-copper bonding at low temperature and to achieve good quality for wafer-level bonding process under vacuum, and finally, to develop the chip-level bonding methods, which are suitable for short time condition in an atmospheric environment.
The traditional copper-to-copper bonding technology needs to be carried out under the process condition of high temperature and high pressure to realize the good bonding quality, but many problems are easily derived under above environmental condition. In order to improve such issues, the first part of the thesis proposes a new metallic material is utilized in the capping passivation method, thereby reducing the process temperature for the copper-to-copper bonding. From the results of the bonding tests, material analysis and reliability tests, the research has verified the feasibility of the metal passivation layer. For the bonding test, high-quality bonding was successfully completed the bonding process at 120°C for 50 minutes. It was found by transmission electron microscopy (TEM) that copper atoms diffused to the surface through the metal passivation layer, and then it formed a continuous copper layer. Thus, we could confirm that the metal passivation layer not only had the function to prevent internal copper from oxidation, but also did not obstruct the atomic diffusion to the outermost layer during the bonding process. Accordingly, we achieved the goal of the research for the copper-to-copper bonding. In addition, the Kelvin structure was treated as the basic structure for the electrical measurement. The samples were prepared by flip chip bonding. The lowest process temperature was at 100°C (for 3 minutes), and the shortest time was for 15 seconds (at 150°C). Both of them could pass the reliability tests, which were respectively temperature cycling test of 2000 loops and humidity test of 264 hours. The results of contact resistance were stable, which was about 10-7 Ω‧cm2, indicating that the structure for the passivation method was not only unaffected by harsh environment, but also had a good structural stability.
The second part of this thesis is to further develop the bonding process at the ultra-low temperature with the design of the addition of the wetting layer as a new structure for the capping passivation method. The design concept for the wetting layer was to improve the grain size of the thin film deposition, and then obtained a better bonding surface. The bonding test was completed the bonding process at 100 ° C for 15 minutes. Due to the material properties of the metal, the design structure had the function for protecting the internal copper. Besides, the addition of the wetting layer could increase numbers of grain boundaries on the bonding surface, and then it was suitable for the atomic diffusion at low temperature in a short time. Therefore, regardless of the temperature and time for the bonding conditions, they could be effectively reduced to the limit. Undoubtedly, the ultra-low temperature bonding technology had been successfully developed in this research. In this study, the electrical test samples were prepared by flip chip bonding with the lowest process temperature at 70°C (for 3 minutes) and the shortest time for 15 seconds (150°C). Both of them passed the reliability test with temperature cycling test of 2000 loops and humidity test of 264 hours. The contact resistance was stable, and it was lower than the sample with metal passivation, which was about 10-7~10-8 Ω‧cm2. Therefore, the new design structure was not only unaffected by harsh environment, but also had a better bonding quality than metal passivation.
In this thesis, a series of low-temperature copper-to-copper bonding test, material analysis and reliability test are carried out by the capping passivation method. The copper structures with two methods of passivation application are successfully utilized to realize in the symmetric wafer level bonding process at low temperature. The electrical measurements are stable after the reliability test. These results prove that the two process methods proposed in the thesis can provide good performance and structural stability. Therefore, above methods will provide good improvement in the future for the TCB application between TSVs. In addition, in order to achieve the goal such as low cost and high throughput, this study investigates the limit temperature and limit duration time with passivation structure, and the samples are prepared by flip-chip bonding in an atmosphere environment. The above samples already pass the reliability test. In summary, the researches in the thesis provide a platform with the novel bonding technology for the heterogeneous 3D integration and packaging.
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Santos, Paulo Sérgio Soares dos. "Development of a low-cost interrogation system platform for corrosion sensors in offshore metallic structures." Dissertação, 2018. https://hdl.handle.net/10216/118768.
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Santos, Paulo Sérgio Soares dos. "Development of a low-cost interrogation system platform for corrosion sensors in offshore metallic structures." Master's thesis, 2018. https://hdl.handle.net/10216/118768.
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Hung, Chieh-Tsan, and 洪捷粲. "Development of a Parallelized Fluid Modeling Code and Its Applications in Low-temperature Plasmas." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/94837468167233234893.
Full textAbstract:
博士<br>國立交通大學<br>機械工程學系<br>98<br>Development of parallelized 1D/1D-axisymmetric and 2D/2D-axisymmetric fluid modeling codes using fully implicit finite-difference method with hybrid analytical-numerical Jacobian evaluation for low-temperature, non-equilibrium plasma simulation has been reported in this thesis. Implementation and validations against earlier simulations and experimental data are described in detail. Applications with wide range of pressures and frequencies (radio frequency in mega Hertz and alternating current in kilo Hertz) are demonstrated, compared with experimental data wherever possible, and related plasma physics and chemistry are discussed therein. Research in this thesis is divided into three major phases, which are briefly described in the
following in turn.
In the first phase, parallelized 1D/1D-axisymmetric and 2D/2D-axisymmetric fluid modeling codes based on distributed memory framework were developed and verified. Fluid modeling equations, resulting from the velocity moments of Boltzmann equation, include continuity equations
for all species, momentum equations with drift-diffusion approximation for all charged species, diffusion approximation for neutral species, energy density equation for electrons and Poisson’s equation for electrostatic potential distribution. All model equations were nondimensionalized and discretized using fully coupled Newton-Krylov-Schwarz (NKS) algorithm, in which the overlapping additive Schwarz method and Bi-CGStab/GMRES scheme were used as the preconditioner and linear matrix equation solver, respectively. An atmospheric 1D helium
dielectric barrier discharge (DBD) (driven by 13.56 MHz and 20 KHz power sources) and an atmospheric nitrogen 1D DBD (driven by 60 KHz power source) are simulated and validated by excellent agreement of discharged currents with experimental results obtained in our laboratory. In addition, a 2D-axisymmetric RF driven GEC chamber with helium discharge (capacitively coupled plasma) was simulated and the results agree reasonably well with previously reported experimental data. Then, parallel performance of the fluid modeling code was investigated
using the same GEC case, which was simulated on a PC cluster system (V’ger cluster system with Xeon 3GHz dual-core dual-CPU, the Center for Computational Geophysics, National Central University, Taiwan.) up to 144 processors. The parallel performance showed superlinear speedup up to 144 processors with the GMRES as the matrix solver combining with LU as the preconditioner.
In the second phase, a one-dimensional helium DBD driven by 20 KHz distorted sinusoidal voltages was investigated in detail using the developed fluid modeling code. Effect of selecting plasma chemistry on simulations of helium DBD was investigated by comparing simulations with experiments. Results show that the simulations, which include more helium related reaction channels, could faithfully reproduce the measured discharged temporal current quantitatively. Based on the simulated discharge properties, we have found that there is complicated
mode transition of discharges from the long secondary Townsend like to the dark current like, then to short primary Townsend like and to short secondary Townsend like. Related plasma physics and chemistry are described in detail.
In the third phase, a chamber-scale gas discharge of plasma enhanced chemical vapor deposition (PECVD) with silane/hydrogen as the precursors, which was used for depositing hydrogenated amorphous silicon thin film, was simulated. A multiscale temporal marching scheme for electron, ion and neutral species is designed to reduce the computational cost. Neutral flow and thermal field obtained by a finite-volume Navier-Stokes equation solver was used
as the background gas. The plasma chemistry includes 15 species and 28 reaction channels. Results show that SiH3 is the most dominating radical species with silicon that is directly related to silicon film deposition, which agree with previous experiments and simulations. The deposition rate and uniformity evaluated from the simulation results agree with experiment data if the fraction of reaction sites is assumed to be 0.015.
Recommendations of future research are also outlined at the end of this thesis.
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Martins, Dina Rodrigues. "Development of immunoassays on the Simoa platform to detect and differentiate Tau species at very low concentrations." Master's thesis, 2018. http://hdl.handle.net/10316/86178.
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Dissertação de Mestrado em Biologia Celular e Molecular apresentada à Faculdade de Ciências e Tecnologia<br>Taupatias são um grupo de doenças neurodegenerativas que se caracterizam por demência associada a agregação da proteína Tau, sendo a mais comum a doença de Alzheimer. Tau é uma proteína de ligação aos microtúbulos envolvida na formação, estabilização e espaçamento dos mesmos. Alterações no padrão de fosforilação e outras modificações pós-transcricionais podem reduzir a afinidade de ligação aos microtúbulos e aumentar a capacidade de agregação. No entanto, se é a perda e/ou ganho de função que promovem a neurodegeneração não é ainda completamente conhecido.Embora Tau seja considerada uma proteína intracelular, há cada vez mais estudos que demonstram a existência desta proteína no meio extracelular, sugerindo o seu possível envolvimento na propagação da patologia ao longo do cérebro. O mecanismo de propagação da Tau e o que caracteriza as formas da proteína capazes de se propagar continuam ainda por elucidar. Neste projeto foram desenvolvidos três immunoassays na plataforma Simoa (Single molecule array immunoassay). Um assay para a deteção de Tau total e dois assays capazes de detetar formas fosforiladas. Com estes assays foi possível detetar Tau e Tau fosforilada em ISF (líquido intersticial) cerebral de ratinhos wild-type, apontando para uma possível função extracelular desta proteína. Agora que demonstrámos o potencial do Simoa, será possível caracterizar a Tau extracelular em situação de saúde e doença de modo a aumentar o conhecimento acerca da biologia da proteína Tau, criando novas oportunidades para a validação de biomarcadores e desenvolvimento de novas terapias.<br>Tauopathies are a group of neurodegenerative disorders characterized by dementia associated with the aggregation of Tau, of which the most common is Alzheimer’s disease. Tau is a microtubule binding protein with a role in assembly, stabilization and spacing of microtubules. Abnormalities in phosphorylation and other post-translational modifications of Tau can decrease microtubule binding and increase aggregation propensity. However, it is still under debate if the loss of Tau function and/or the gain of toxic function of the aggregates are the cause of neurodegeneration.Albeit Tau has always been presented as an intracellular protein, more and more studies show the existence of extracellular Tau and suggest its involvement in the propagation of Tau pathology throughout the brain. The exact mechanism of Tau spread from one cell to the other and the precise characteristics of the Tau species involved, are still not fully elucidated. In this project three sensitive immunoassays were developed on Simoa (single molecule array immunoassay). One to detect total Tau, and two different phospho-Tau assays. With these assays we could detect Tau and phosphorylated Tau in brain ISF (interstitial fluid) from wild-type mice. This observation leads to the hypothesis that Tau might also exert an extracellular function. However, now that we established the potential of the Simoa, extracellular Tau can be further characterized in health and disease to bring new insights on Tau biology and surely create new opportunities for biomarker validation and therapy development.
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Silva, Michael Simões. "Validation of Data Invariants in the OutSystems Platform." Master's thesis, 2019. http://hdl.handle.net/10362/113610.
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Software systems collect information from multiple sources, both internal and exter nal. Therefore, it is indispensable that the data should be validated according to data
invariants, in all untrusted frontiers of a system. Developers need to define the validation
logic for each of those constraints and to write the actual validation code. To safeguard
data integrity throughout the entire system, the developers also need to ensure validation
in different layers. This obligation can easily head to a problem since it usually leads to
duplication of the validation code and contributes to more complex and less structured
software architecture, which consequently leads to systems harder to maintain.
The OutSystems platform enables visual development of enterprise Web and Mobile
applications, providing an abstraction layer that allows developers to handle the inherent
complexity of application development more easily. Still, developers need to write the
code responsible for validating data explicitly.
We propose an invariant propagation mechanism capable of propagating data con straints across the various layers of a system, that materialises into the automatic gen eration of validation code that properly ensures the data integrity in the entire system.
Given a set of data constraints, or invariants, defined in the data layer that constrain
entities’ attributes, our mechanism propagates and manipulates their specification. The
propagation is done using a path-sensitive data flow analysis technique, specified in Dat alog and that uses a Prolog engine as the resolution engine. This solution ensures that
the developer only needs to define the data invariants and their logic once in the entire
application, and also ensures that it will generate validations whenever necessary. Thus,
we remove the programmer’s obligation of writing and maintaining validation code, plus
ensuring data integrity and providing faster error feedback to users. We evaluated our
results in a prototype of the OutSystems platform.
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Bexiga, Mariana de Oliveira Alves. "Closing the Gap Between Designers and Developers in a Low-Code Ecosystem." Master's thesis, 2020. http://hdl.handle.net/10362/116771.
Full textAbstract:
Digital systems play an important role in the strategy of companies nowadays as they are
crucial to achieve their business goals as well as gain a competitive advantage. This is
particularly true for systems designed for the end-users market. Not only has the number
of such systems been growing steadily but the requirements and expectations of users
regarding usability and performance have also increased.
Developing software systems is a complex process that comprises several stages and
involves multiple professionals responsible for different tasks. Two stages of the process
are the design and implementation of User Interfaces. UX and UI designers produce
artifacts such as mockups and prototypes using design tools describing what should
be the systems behavior, interactivity and look and feel. Next, Front-end and Back-end
developers implement the system according to the specifications defined by designers.
Designers and developers use different methodologies, languages, and tools. This
introduces a communication gap between both groups, and hence collaboration between
them is not always smooth. This ends up causing less efficient processes, rework and loss
of information.
Developers sometimes overlook the importance of User Experience and Front-end De velopment. The corresponding project stages suffer when collaboration between groups
is not optimal. Problems are particularly striking during the transition from design arti facts to front-end code. The procedures for doing this are often manual, very error-prone,
and time-consuming for developers that end-up completely re-doing the designers’ work
in the target web technology.
The aim of this dissertation is to improve the efficiency of collaboration between de signers and front-end developers in the OutSystems ecosystem. This was carried out by
developing a tool that transforms UX/UI design artefacts into low-code web-technology
using model transformation and meta-modelling techniques. The approach has been
evaluated in practice by a team of professional designers and front-end developers. Re sults show savings between 20 and 75% according to the project complexity in the effort
invested by development teams in the above mentioned process.<br>Os sistemas digitais têm um papel muito importante hoje em dia na estratégia das empresas, uma vez que as ajudam a atingir os seus objetivos de negócios assim como a ganhar
vantagem competitiva face às demais. Isto é particularmente verdade para os sistemas
destinados ao mercado dos utilizadores finais. Não só aumentou significativamente o
número de tais sistemas como aumentaram também os requisitos e expectativas dos seus
utilizadores.
O desenvolvimento de sistemas de software é um processo complexo que envolve
um número alargado de profissionais com diferentes perfis. Duas das fases são o design
de interfaces e a sua implementação. Os UI e UX designers produzem um conjunto de
ficheiros utilizando ferramentas de design descrevendo o comportamento, interação e
aparência do sistema. Os Front-end e Back-end developers implementam as funcionalidades do sistema com base nas especificações dos designers. Designers e developers
trabalham utilizando diferentes metodologias, linguagens e ferramentas. Isto introduz
uma lacuna entre os grupos e dificulta a sua colaboração, originando processos menos
eficientes, trabalho refeito e perda de informação.
Os engenheiros de software por vezes negligenciam disciplinas tais como a Experi ência do Utilizador e o Front-end. Estas fases dos projetos são prejudicadas quando a
colaboração entre os grupos não é ótima. Os problemas são particularmente evidentes
durante a transição entre design e Front-end. Os procedimentos são manuais, altamente
propensos a erros e demorados para os developers, que acabam por refazer o trabalho dos
designers na tecnologia web desejada.
O objetivo desta dissertação é melhorar a eficiência da colaboração entre designers e
front-end developers no ecossistema OutSystems. Isto foi levado a cabo desenvolvendo
uma ferramenta capaz de transformar artefactos de UX/UI em low-code utilizando transformações de modelos e técnicas de meta-modeling. A abordagem foi avaliada em prática
por uma equipa profissional de designers e front-end developers. Os resultados obtidos
mostram poupanças entre os 20 e os 75% de acordo com a complexidade do projeto no
esforço investido pelas equipas de desenvolvimento no processo mencionado acima.
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Chung, Chen-I., and 鍾昰毅. "Voltage Adjusting with Voltage Domain Programmable Techniques Development for Low Power Video Decoder Chip Design and Platform Validation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/74056711485977507444.
Full textAbstract:
碩士<br>逢甲大學<br>電子工程所<br>98<br>Multi-voltage technique is an effective way to reduce power consumption. In the proposed voltage domain programmable (VDP) technique, the high and low voltages applied to logic gates are programmable. The flexible voltage domain reassignments allow the chip performance and power consumption to be adjusted during circuit operation. In the proposed technique, the power switches possess the feature of flexible programming after chip manufacturing.
The purpose of the VDP technique is to manage the circuit performance while obtaining lower power consumption. Based on the multiple delay time constraint (for different operation mode), the voltage scaling technique selects the logic gates in noncritical paths using lower supply voltage. Using VDP, the voltage domain can be reorganized after chip manufacturing. The different voltage domains allow for circuit operation with different circuit delay times and power consumptions. With VDP technique, the circuit operation can be divided into several modes. The modes are adopted to manage the circuit operation speed and power expenditure.
VDDH (High Vdd) and VDDL (Low Vdd) voltages applied to logic gates are programmable, and logic gates can be specified as belonging to high or low voltage domains according to user/application requirements. The different voltage domains allow the chip performance and power consumption to be flexibly adjusted.
In the proposed technique, the PS possesses the feature of flexible programming by providing the cross and forward two power-rail connections. The VDP circuits can be easily controlled according to the user/application requirement after chip manufacturing. The proof of this novel technique through a video decoder test shows power reduction with a good power-performance management mechanism. The test chip can be physical implementation and validation in video decoding platform.
Key word: low power, dynamic voltage
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Upadrashta, Raviteja. "Design and Development of a Passive Infra-Red-Based Sensor Platform for Outdoor Deployment." Thesis, 2017. http://etd.iisc.ernet.in/2005/3439.
Full textAbstract:
This thesis presents the development of a Sensor Tower Platform (STP) comprised of an array of Passive Infra-Red (PIR) sensors along with a classification algorithm that enables the STP to distinguish between human intrusion, animal intrusion and clutter arising from wind-blown vegetative movement in an outdoor environment. The research was motivated by the aim of exploring the potential use of wireless sensor networks (WSNs) as an early-warning system to help mitigate human-wildlife conflicts occurring at the edge of a forest.
While PIR sensors are in commonplace use in indoor settings, their use in an outdoor environment is hampered by the fact that they are prone to false alarms arising from wind-blown vegetation. Every PIR sensor is made up of one or more pairs of pyroelectric pixels arranged in a plane, and the orientation of interest in this thesis is one in which this plane is a vertical plane, i.e., a plane perpendicular to the ground plane. The intersection of the Field Of View (FOV) of the PIR sensor with a second vertical plane that lies within the FOV of the PIR sensor, is called the virtual pixel array (VPA). The structure of the VPA corresponding to the plane along which intruder motion takes place determines the form of the signal generated by the PIR sensor. The STP developed in this thesis employs an array of PIR sensors designed so as to result in a VPA that makes it easier to discriminate between human and animal intrusion while keeping to a small level false alarms arising from vegetative motion. The design was carried out in iterative fashion, with each successive iteration separated by a lengthy testing phase. There were a total of 5 design iterations spanning a total period of 14 months.
Given the inherent challenges involved in gathering data corresponding to animal intrusion, the testing of the SP was carried out both using real-world data and through simulation. Simulation was carried out by developing a tool that employed animation software to simulate intruder and animal motion as well as some limited models of wind-blown vegetation. More specifically, the simulation tool employed 3-dimensional models of intruder and shrub motion that were developed using the popular animation software Blender. The simulated output signal of the PIR sensor was then generated by calculating the area of the 3-dimensional intruder when projected onto the VPA of the STP. An algorithm for efficiently calculating this to a good degree of approximation was implemented in Open Graphics Library (OpenGL). The simulation tool was useful both for evaluating various competing design alternatives as well as for developing an intuition for the kind of signals the SP would generate without the need for time-consuming and challenging animal-motion data collection.
Real-world data corresponding to human motion was gathered on the campus of the Indian Institute of Science (IISc), while animal data was recorded at a dog-trainer facility in Kengeri as well as the Bannerghatta Biological Park, both located in the outskirts of Bengaluru. The array of PIR sensors was designed so as to result in a VPA that had good spatial resolution. The spatial resolution capabilities of the STP permitted distinguishing between human and animal motion with good accuracy based on low-complexity, signal-energy computations. Rejecting false alarms arising from vegetative movement proved to be more challenging. While the inherent spatial resolution of the STP was very helpful, an alternative approach turned out to have much higher accuracy, although it is computationally more intensive. Under this approach, the intruder signal, either human or animal, was modelled as a chirp waveform. When the intruder moves along a circular arc surrounding the STP, the resulting signal is periodic with constant frequency. However, when the intruder moves along a more likely straight-line path, the resultant signal has a strong chirp component. Clutter signals arising from vegetative motion does not exhibit this chirp behavior and an algorithm that exploited this difference turned in a classification accuracy in excess of 97%.
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Ferreira, António Simões. "Integration of Visual Languages with SCS tools in the Software Development Industry." Master's thesis, 2019. http://hdl.handle.net/10362/92285.
Full textAbstract:
Source Control Systems (SCS), also known as Version Control Systems (VCS), help teams
to organize and track changes in the software development process. These systems have
become vital in the software development industry as the increased growth and geographical
diversity of teams, forced them to find solutions to deal with multiple people
accessing the same pieces of software concurrently. Although for a while SCS seemed to
be coping well with the needs of software development, the rise of the low-code platforms
and Visual Programming Languages (VPLs) brought a new challenge to version control:
how to manage visual artifacts without losing SCS functionalities? The biggest cause of
this challenge is the fact that SCS are mostly oriented to work with text-based programming
languages. Thus text-oriented SCS are (in general) incapable of dealing with visual
artifacts as well as they do with text. So, to cope with the loss of SCS functionalities in
VPLs projects, teams either accept and work with this loss or are forced to come up with
a solution of their own to tackle a specific version control problem. These issues can be
found in the OutSystems platform, which is our case study.
To solve this problem, we propose a system, termed OSGit, that acts as a man-in-themiddle
between the low-code platform and the designated SCS. The proposed system will
translate the requested version control operations from the low-code platform to native
operations of the given SCS. In operations that require visual artifacts to be managed - like
applying blames - we propose the creation of metadata files. The metadata files contain
the needed information about the visual elements used to build applications in the lowcode
platform. This information is thus a compacted representation of the visual elements
through text. Therefore, using metadata files will allow the SCS to correctly handle the
required visual artifacts while integrating this system with a low-code platform or a VPL.
The produced system obtained auspicious results in the usability tests that were performed
and that featured ten OutSystems developers. They showed great satisfaction
when using OSGit and also gave suggestions for future improvements. OSGit bridges the
gap between text-based SCS and visual artifacts, which proves the possibility of integrating
these systems in the world of VPL with a high-level of user satisfaction.
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Springwald, Martin, and Wolfram Hardt. "Entwicklung einer RAD-Plattform im Kontext verteilter Systeme." 2019. https://monarch.qucosa.de/id/qucosa%3A34384.
Full textAbstract:
Häufig wird für kommerzielle oder wissenschaftliche Zwecke Individualsoftware benötigt. Obwohl Anwendungen häufig denselben Mustern folgen, müssen oft auch triviale Bestandteile immer wieder neu entwickelt werden, zudem erfordert die Entwicklung allgemein entsprechende Fachkenntnisse. Daher besteht die Idee Plattformen zu entwickeln, die keine oder wenig Programmierung erfordern und somit die einfache und schnelle Entwicklung von Anwendungen unterstützen, um Zeit und Kosten zu sparen. Das W3C hat für verteilte Dienste Standards für die Beschreibung von Diensten, Prozessen und auch die Präsentation etabliert. Es ist Ziel dieser Arbeit diese Standards zu kombinieren und ein kompatibles, jedoch vereinfachtes Beschreibungsformat zu entwickeln, einschließlich einem Werkzeugkasten für die Codegenerierung und Bereitstellung einer Laufzeitumgebung. Durch Modularisierung soll die Plattform einfach erweiterbar bleiben.