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Showing results 7135 to 7154 of 9073
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  • Authors: Engel, Dirk;  Advisor: -;  Participants: Eckl, Verena; Rothgang, Michael (2019)

  • Abstract This paper analyzes the effects of the governmental financing instrument Spitzencluster-Wettbewerb (Leading-Edge Cluster Competition, LECC) on R&D expenditure of firms in Germany. The LECC promotes cooperative research among business firms and research institutions under the umbrella of a common strategy, which is pursued by regional cluster organizations. We measure the effect of LECC funding on private R&D spending as well as the effects of the policy instrument on the composition of R&D (internal vs. external). Our analysis is mainly based on data from the R&D survey for Germany. We combine propensity score matching (to identify statistical twins) with a difference-in-differ...

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  • Authors: Elberinka, S. Oude;  Advisor: -;  Participants: - (2013)

  • We present a method for detecting and modelling rails in mobile laser scanner data. The detection is based on the properties of the rail tracks and contact wires such as relative height, linearity and relative position with respect to other objects. Points classified as rail track are used in a 3D modelling algorithm. The modelling is done by first fitting a parametric model of a rail piece to the points along each track, and estimating the position and orientation parameters of each piece model. For each position and orientation parameter a smooth low-order Fourier curve is interpolated. Using all interpolated parameters a mesh model of the rail is reconstructed. The method is explai...

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  • Authors: Hess, L.J.T.;  Advisor: -;  Participants: Hinckley, E.S.; Robertson, G.P.; Hamilton, S.K.; Matson, P.A. (2018)

  • We compared the effects of larger, less frequent rain events (“intensified” rainfall) vs. smaller, more frequent rain events (“normal” rainfall) on soil water content and deep percolation. The effect of intensified rainfall on the volumetric water content (VWC) of soil at the 10‐cm depth during the experiment varied seasonally: in spring, intensified rainfall decreased the average VWC at the 10‐cm depth by 0.05 ± 0.01 cm3 cm−3 compared with normal rainfall, but in summer and fall, it had no effect. In soil at the 100‐cm depth, VWC declined during the summer in normal but not intensified plots. A surface‐added Br− tracer was detected and peaked earlier in soil water at 120 cm under int...

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  • Authors: Buckerfield, S.J.;  Advisor: -;  Participants: Quilliam, R.S.; Waldron, S.; Naylo, L.A.; Li, S.; Oliver, D.M. (2019)

  • During the wet season, hourly water sampling was undertaken throughout five storm events to characterise in high detail E. coli emergence with resulting flow across multiple sites of varying catchment area, stream order, and land-use. E. coli concentration was found to increase by 1–3 orders of magnitude following rainfall events. Maximum E. coli concentration and speed of E. coli recession were influenced by rainfall (amount, intensity), timing of agricultural activities, and position in the hydrological system. For high intensity events ∼90% of the cumulative E. coli export occurred within 48 h. E. coli concentration increased with increasing discharge at all sites. E. coli concentr...

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  • Authors: Vuong, Tai Chi;  Advisor: -;  Participants: Dinh, Nhat Quang; Ho, Sy Tam; Nguyen, Trung Viet (2020)

  • Assessing flood extent and damages is paid great concern from both authorities and researchers because of flood frequency and consequences. Quang Nam, a Central Coast province of Vietnam, experiences enormous tropical storms. The year 2020 is considered the historic storm year, destroying many properties and public constructions and causing many injuries and fatalities. Therefore, rapid assessment of flood extent and damages can provide a timely response to heavy flood events. In this study, the authors adopted the Google Earth Engine (GEE) platform to quickly extract flood extent from Sentinel-1 images and rapid assessment of flood damages. Sentinel-1 images covering Quang Nam provin...

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  • Authors: Isaza-Meza, Mariana;  Advisor: -;  Participants: Afanador-Rubio, Diana Carolina; Huérfano-Castro, Manuel Alejandro; Ramírez-Correa, Ivon; Flórez-Vargas, Adriana Alejandra (2023)

  • Anti-glomerular basement membrane (GBM) disease, also known as "Goodpasture syndrome," is an autoimmune vasculitis that affects small vessels through the deposit of IgG antibodies against the glomerular and alveolar basal membranes which are visualized as linear deposits in the GBM. The target of these autoantibodies is the non-collagen-1 domain of type IV collagen on the GBM, which presents changes in the structure of the α-345 hexamer, leading to a conformational change that triggers an autoimmune response (Gulati and McAdoo 2018). ANCA-associated vasculitis (AAVs) is a necrotizing vasculitis with few-to-none immune deposits, also affecting small vessels, and is associated with spec...

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  • Authors: Tag-Adeen, Mohammed;  Advisor: -;  Participants: Abdellatif, Abeer Awad; Kamel, Ahmed Hosni; Alboraie, Mohamed (2022)

  • Gastrointestinal tract can be compressed by many vascular structures in the abdomen; such compressions may be incidentally found or may result in compression symptoms like abdominal pain and vomiting.

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  • Authors: Hussain, S.I.;  Advisor: -;  Participants: Frey, S.K.; Blowes, D.W.; Ptacek, C.J.; Wilson, D.; Mayer, K.U.; Su, D.; Gottschall, N.; Edwards, M.; Lapen, D.R. (2019)

  • Macropores can be important conduits for surface‐derived nutrients to reach subsurface receptors. Accordingly, nutrient reactive transport processes in macroporous soils need to be well understood. In this study, steady‐state two‐dimensional reactive transport simulations with MIN3P‐THCm (version 1.0.519.0) were used to elucidate how soil macropore connectivity to tile drains can influence N transformations following liquid swine manure (LSM) applications to soil. Four different soil scenarios were considered: homogeneous sand, homogeneous clay loam, and clay loam with discrete macropores connected to or disconnected from the bottom boundary used to represent tile drain outflow. In re...

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  • Authors: Jeong, S.;  Advisor: -;  Participants: Hester, J. G. D.; Su, W.; Tentzeris, M. M. (2019)

  • This letter describes the implementation of a machine learning (ML) classification strategy for read/interrogation enhancement in chipless radio frequency identification (RFID) applications. A novel ML-based approach for classification and of detection tag identifications (IDs) has been presented, which can perform effective transponder readings for a wide variety of ranges and contexts, while providing tag-ID detection accuracy of up to 99.3%. Four tags encoding the four 2 bit IDs were inkjet-printed onto flexible low-cost polyethylene terephtalate substrates and interrogated without crosstalk or clutter interference de-embedding at ranges up to 50 cm, with different orientations and wi...

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  • Authors: Madsen, Henrik;  Advisor: -;  Participants: Falk, Anne Katrine (2017)

  • We present a new approach for real-time optimisation of large river and reservoir systems that combines physically-based hydrological-hydrodynamic models with surrogate control models within a Model Predictive Control framework. The approach is demonstrated in the optimisation of storage operations of the Murrumbidgee River system in New South Wales, Australia. This system consists of multiple reservoirs with pronounced travel times between the reservoirs. The test shows a large potential for improving operational efficiency of large water systems.

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  • Authors: Wong, S. Y.;  Advisor: -;  Participants: Yap, K. S.; Zhai, Q.; Li, X. (2019)

  • Most existing state-of-the-art deep learning algorithms discover sophisticated representations in huge datasets using convolutional neural networks (CNNs) that mainly adopt backpropagation (BP) algorithm as the backbone for training the face recognition problems. However, since decades ago, BP has been debated for causing trivial issues such as iterative gradient-descent operation, slow convergence rate, local minima, intensive human intervention, exhaustive computation, time-consuming, and so on. On the other hand, a competitive machine learning algorithm called extreme learning machine (ELM) emerged with extreme fast implementation and simple in theory has overcome the challenges fa...

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  • Authors: Kim, H.J.;  Advisor: -;  Participants: Han, S.H.; Kim, S.; Ko, D.; Yun, S.T.; Son, Y. (2020)

  • This study was conducted to analyze CO2 migration from a shallow CO2 release experiment using a continuous soil CO2 flux measurement system. Approximately 1.8 t CO2 was injected from 1 to 30 June 2016 through the point sources with perforated release wells laid at 2.5‐m soil depth. Using LI‐8100A instruments, CO2 concentration, CO2 flux, soil temperature, soil moisture, relative humidity, and atmospheric pressure were continuously measured every 30 min at 0, 1.5, 3.0, 4.5, and 6.0 m from the well from 29 May to 4 August 2016. Typically sensors for soil temperature and moisture were installed at 5‐cm depth, and CO2 concentration, relative humidity, and atmospheric pressure were measure...

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  • Authors: Kraak, M.J.;  Advisor: -;  Participants: - (2014)

  • This lecture presents: Overview of developments in laser scanning; Developments in hardware technology: Multiple Pulses in the Air (MPiA); Full-waveform recording; More versatile terrestrial laser scanners; Developments in SLAM; Honorable mention: Kinect; Developments in processing methodology and applications: Rail track detection and modelling.

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  • Authors: Nguyen, Xuan Tinh;  Advisor: -;  Participants: Tanaka, Hitoshi; Nguyen, Trung Viet; Nguyen, Van Sy (2018)

  • The objective of this study is to investigate the shoreline changes before and after the road construction based on the rectified aerial photograph analysis. Analyzed results indicated that the impact of the new road construction is a main reason causing the disappearance of sandy beach on Ba Lang region. The straight forward direction of the road had changed the incidence wave angle to the shoreline. As a result, the unbalancing of wave-induced longshore current caused the sediment moving to either left-hand side or right-hand side direction dependent on the location on the beach. These results are also suggested that in order to recover the sandy beach in this area, the shape of sho...

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  • Authors: Nguyen, Trung Viet;  Advisor: -;  Participants: Tanaka, Hitoshi; Nguyen, Xuan Tinh; Dinh, Van Duy; Nguyen, Van Luc (2018)

  • My Khe Beach is located in Da Nang, the biggest city in Central Vietnam. Coastal erosion occurred in December 2017 has damaged infrastructures located along this beach. Since there is no well-documented case study about coastal erosion in this area, Google Earth images since 2002 were utilized to investigate the deformation of My Khe Beach. The analysis results indicate that formations of mega-cusps in this beach were noticeable during the northeast monsoon season and it is clear that beach erosions occurred at the embayment of the mega-cusps. In addition, these mega-cusps were smoothened by the calm waves during the south monsoon season a few months later. The megacusps observed al...

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  • Authors: Elkhatat, Ahmed M.;  Advisor: -;  Participants: Soliman, Mariam; Ismail, Rim; Ahmed, Somaya; Abounahia, Nada; Mubashir, Shamna; Fouladi, Sohila; Khraisheh, Majeda (2021)

  • Water pollution due to the disposal of heavy metals in water bodies is one of the most global concerns that adversely affect the ecosystem and human health because of their non-biodegradability and potential of accumulation. Copper is one of the most present metals in the environment released mainly from disposing of agricultural fertilizers and pesticides, mining operations, chemical, pharmaceutical, and paper manufacturing industries into stream bodies. The elevated exposure to Cu(II) causes severe toxicity, diabetes, anemia, kidney disorders, liver damage, and death.