CJDB - A simple and efficient data model to store CityJSON in a database

A 3D city model uses three-dimensional geometries to represent and model urban environments, in which the building model is the key feature. With the development of computer and data collection technologies, 3D city models are gaining growing capacities regarding storing rich information. This makes 3D city models more potentially useful than...

Development of a Catalysis Analytics Platform: Enabling Machine Learning in Catalyst Discovery

Recently machine learning (ML) has become increasingly popular, and has been shown to be a powerful predictive technique. The applications of ML cover a wide range of disciplines, including the natural sciences. Presently, the field of catalysis is still relatively unexposed to ML and other data-driven techniques. This can largely be attributed...

Barriers and Drivers for Private Investment in Nature-Based Solutions: A Transdisciplinary Analysis of Private Investment in Nature-Based Solutions Using Bayesian Belief Network Theory

A lack of understanding of ecosystem-related projects and scarcity of natural capital reimbursement mechanisms leads to passive involvement and hesitation from the private sector when investing in nature. This study conducts a systematic literature review, furnishes a database of the relevant barriers and drivers for the private investment in...

A way to store, query, update an InSAR spatiotemporal dataset

In SAR interferometry, the data acquired by satellite are large. The points in the dataset are usually expressed in spatial-temporal dimension in which many epochs may be included. Extra information including contextual values and data from other sources sometimes are important to be taken into account when analyzing the deformation based on the...

Finding and materializing common subexpressions among queries in a query workload

Most queries in a collection of queries, also called a query workload, to some degree have parts of their intermediate execution steps in common. These intermediate exe- cution steps, also called subexpressions, provide the opportunity to further optimize query workload execution in addition to the already existing query optimization done by the...

Utilizing a Discrete Global Grid System For Handling Point Clouds With Varying Locations, Times, and Levels of Detail

Discrete Global Grid Systems (DGGS) have emerged in recent years as a new specification for working with global heterogeneous datasets of different types, such as vector, raster, and quantitative datasets. There exists no research on using point clouds with a DGGS. This research aims to analyse the extent to which a DGGS can be used to handle...

Time-Dependent Capacity of Driven Displacement Piles in Sand

A time-dependent capacity increase has often been observed for driven displacement piles in sand. Long-term bearing capacity increase after dissipation of excess pore water pressure is referred to as set-up. Significant increases in axial capacity have been reported where the rate of set-up varied between 15 and 75% per log cycle of time. <br/>...

Extending Alan-DB: Designing a DBMS for storing and retrieving typed, rooted graph-based data on disk

Storing Massive TINs in a DBMS: A comparison and a prototype implementation of the multistar approach

Solutions have been introduced to handle massive point clouds in Database Management Systems (DBMS), namely by Oracle in 2011 and postgreSQL in 2013. Many common operations on these massive point clouds require knowledge about the original surface in order to analyse them. A possible method to recreate a representation of the original surface is...

A database for Dutch infrastructure projects and their results

On the Equivalence of Nested Relational Languages

Query optimization has played a vital role in database research since the 1970’s and up till now. In the relational context, a prerequisite to query optimization is the study of equivalences over relational algebra expressions. Sophisticated techniques for query transformations for traditional query languages include rewriting based...

ORM Optimization through Automatic Prefetching in WebDSL

Object-Relational Mapping (ORM) frameworks can be used to fetch entities from a relational database. The entities that are referenced through properties are normally not fetched initially, instead they are fetched automatically by the ORM framework, when they are used by the application. This is called lazy-fetching and can result in many...

dbQuery

Javascript framework voor databasecommunicatie, dat dynamisch klassen en objecten aanmaakt en bruikbaar maakt voor een javascript programmeur, aan de hand van interne databasestructuur.

Design and Implementation of Constraints for 3D Spatial Database: Using Climate City Campus Database as an Example

Nowadays the field of geo-information is undergoing major changes, and the transition from 2D to 3D is having a major influence. A significant amount of 3D datasets are stored in the database. Experts are aware that new quality control mechanisms need to be built into the database systems in order to secure and guarantee high-performing data....

Re-engineering Web Applications from MSO to SSO

Nowadays a lot of small companies maintain multiple websites that require the user to sign up for ordering products or extended interaction. The users have to create an account for each website the company owns, creating duplicate information for the company and forcing the customer to remember multiple accounts. Where big companies can solve...

Communicating ‘structural’ design options: Using dashboard portals for exploring alternatives

This thesis will explore the possibilities of dashboard technology to gather information and display this in such a way that it will help the user making decisions. Inspired by the idea of what we do is based on what we know the alternatives shown on the dashboard will help us making precedents for the project that is being designed. The multi...

Integrated metadata extraction for analysis by diver

This report describes the entire internship process we went through at Joost Technologies, to complete the Bachelor Computer Science program at the University of Delft. Joost Technologies strives to offer users, content owners and advertisers a world-wide, community- driven platform for video content. In the heart of this platform Joost uses a...

Logging TOPdesk Enterprise - Bachelorproject Technische Informatica

Eindverslag Bachelorproject Technische Informatica. De ontwikkeling van een analyse systeem voor logbestanden gegenereerd door de applicatie TOPdesk Enterprise.