- document
-
Rijkeboer, Mats (author)Highly accurate time sources, such as Cesium-based or GPS clocks, are the best candidates to provide a correct notion of time, but are too costly and impractical for implementation in every modern digital device. Ubiquitously, (crystal) oscillators are employed instead. To maintain a shared notion of time, the offsets and drift/jitter have to be...master thesis 2023
- document
-
Yarce Botero, A. (author), Lopez Restrepo, S. (author), Sebastian Rodriguez, Juan (author), Valle, Diego (author), Galvez-Serna, Julian (author), Montilla, Elena (author), Botero, Francisco (author), Henzing, Bas (author), Heemink, A.W. (author)The densest network for measuring air pollutant concentrations in Colombia is in Medellin, where most sensors are located in the heavily polluted lower parts of the valley. Measuring stations in the higher elevations on the mountains surrounding the valley are not available, which limits our understanding of the valley’s pollutant dynamics and...journal article 2023
- document
-
Bredenoord, Jan (author), Kulshreshtha, Y. (author)Earthen techniques have been historically used in construction of housing in Africa, Asia and Latin America. In the past two decades the interest in earthen material has grown considerably, leading to the development of sustainable materials such as compressed earth blocks (CEB), compressed stabilized earth blocks (CSEB) and interlocking...journal article 2023
- document
-
Tsan, Vi-hung (author)Acoustic Force Spectroscopy (AFS) is a versatile tool that uses sound waves to manipulate tiny particles such as cells, bacteria, and even zebrafish embryos in microfluidic systems. This kind of acoustic tweezer is gaining increasing attention due to its high throughput capability and non-invasiveness. In addition, this device allows for...master thesis 2022
- document
-
Erceylan, Meriç (author)In this Thesis a fast, low-cost, anthropomorphic robotic hand with tactile feedback is designed. The hand consists of an index finger and a thumb, both of which have four degrees of freedom. All eight degrees of freedom are fully actuated using eight servomotors whose forces are transferred using tendons. The design introduces tendon routing to...master thesis 2022
- document
-
Mingione, Fabio (author)Reaction wheels are often the main contributor to microvibrations on satellites. These vibrations are a source of pointing errors and therefore need to be limited as much as possible. The miniaturization trend in the space industry and universities fostered the production of very small reaction wheels, suited to Cubesat and PocketQube scales. A...master thesis 2022
- document
-
Kasi, D.G. (author), de Graaf, M.N.S. (author), Motreuil-Ragot, P.A. (author), Frimat, Jean-Phillipe M. S. (author), Ferrari, Michel D. (author), Sarro, Pasqualina M (author), Mastrangeli, Massimo (author), van den Maagdenberg, Arn M.J.M. (author), Mummery, Christine (author), Orlova, Valeria (author)Organ-on-a-chip (OoC) and microfluidic devices are conventionally produced using microfabrication procedures that require cleanrooms, silicon wafers, and photomasks. The prototyping stage often requires multiple iterations of design steps. A simplified prototyping process could therefore offer major advantages. Here, we describe a rapid and...journal article 2022
- document
-
Krietemeyer, A. (author), van der Marel, H. (author), van de Giesen, N.C. (author), ten Veldhuis, Marie-claire (author)Low-cost dual-frequency receivers and antennas have created opportunities for a wide range of new applications, in regions and disciplines where traditional GNSS equipment is unaffordable. However, the major drawback of using low-cost antenna equipment is that antenna phase patterns are typically poorly defined. Therefore, the noise in...journal article 2022
- document
-
Shehu, Maimuna Bala (author)This report encompasses a graduation project submitted to fulfil the requirements for the title of Master of Science at the Faculty of Architecture and the Built Environment, Delft University of Technology. This research was conducted to find an alternative use for waste plastic as building components, specifically for the residents of an IDP...master thesis 2021
- document
-
Wang, WANG (author)In coastal Tainan, aquaculture had become prosperous for more than 200 years. But the local communities are facing some difficulties in the past decades. These include over-development, flooding, and unstable living quality. The built environment had changed a lot on the site. Developers keep filling soil to the fishponds and build more and more...master thesis 2021
- document
-
Maes, Jeff (author)A lowcost multipollutant sensor box is developed, calibrated and deployed to quantify aviationattributable air quality impacts at Amsterdam Schiphol airport. The sensor box contains four lowcost electrochemical gas sensors that respond to CO, NO, NO2 and O3 concentrations in ambient air. Additional sensors in the sensor box allow the...master thesis 2021
- document
-
Buckers, Tim (author)The music information retrieval community has long recognized the need for better evaluation. Frameworks as comprehensive as in the field of text retrieval are missing. An important problem of evaluation for music retrieval is the high cost. This work continues on the proposed low-cost evaluation model. The low-cost model allows for cheap...master thesis 2021
- document
-
Lăpădat, Alexandru M. (author), Tiberius, C.C.J.M. (author), Teunissen, P.J.G. (author)Smartphone accelerometers and low-cost Global Navigation Satellite System (GNSS) equipment have faced rapid and important advancement, opening a new door to deformation monitoring applications such as landslide, plate tectonics and structural health monitoring (SHM). The precision potential and operational feasibility of the equipment play an...journal article 2021
- document
-
Lopez Restrepo, S. (author), Yarce Botero, A. (author), Pinel Pelaez, N. (author), Quintero Montoya, O.L. (author), Segers, Arjo (author), Heemink, A.W. (author)The use of low air quality networks has been increasing in recent years to study urban pollution dynamics. Here we show the evaluation of the operational Aburrá Valley’s low-cost network against the official monitoring network. The results show that the PM<sub>2.5</sub> low-cost measurements are very close to those observed by the official...journal article 2021
- document
-
Data Assimilation as a Tool to Improve Chemical Transport Models Performance in Developing CountriesLopez Restrepo, S. (author), Yarce Botero, A. (author), Quintero Montoya, O.L. (author), Pinel Pelaez, N. (author), Hinestroza Ramirez, J.E. (author), Nino-Ruiz, Elias David (author), Anderson Flórez, Jimmy (author), Rendón, Angela Maíra (author), Alvarez-Laínez, Monica Lucia (author), Heemink, A.W. (author)Particulate matter (PM) is one of the most problematic pollutants in urban air. The effects of PM on human health, associated especially with PM of ≤2.5μm in diameter, include asthma, lung cancer and cardiovascular disease. Consequently, major urban centers commonly monitor PM2.5 as part of their air quality management strategies. The Chemical...book chapter 2021
- document
-
Lăpădat, Alexandru Mihai (author)Under urban sprawl the trend of new established complex structures has rapidly increased. In this context little importance has been given to maintenance, even if this represents an important step in combating and avoiding disasters and developing improved future structural designs. Over the last years low-cost Global Navigation Satellite System...master thesis 2020
- document
-
Moyers Barrera, Gerardo (author)Technology is transforming almost all aspects of our lives, one of them is automation. The main motivation of automation is to help humans avoid performing tedious, high risk jobs. Automated driving, also known as autonomous driving, has been at the center of industrial and academic attention since a few decades now, thanks to its potential of...master thesis 2020
- document
-
Zult, M.J. (author)In 2018, there were more than 200 million reported cases of malaria worldwide, most of which were in Africa. Adequate diagnostics are required to properly treat the disease. According to the WHO, microscopic examination of a blood smear is the Gold Standard of malaria diagnosis. Currently, it is a labor-intensive process requiring trained...master thesis 2020
- document
-
Pasveer, C. (author)It is projected by the United Nations that the population of Addis Ababa will increase to almost double the size as it has by the day today. Due to political, as well as geographical circumstances, there is very little vacant space left to accommodate this growth. To tackle this growth, the Ethiopian government established the Integrated Housing...master thesis 2020
- document
-
Wallace, G.J. (author)The goal of the graduation studio is to research and design housing solutions that improve the livelihood of Addis Ababa’s urban dwellers. Combining analysis, planning and design, the participants of this graduation studio were challenged to use multidisciplinary research methods and tools to elaborate design proposals for the development of a...master thesis 2020