Declarative Specification of Information System Data Models and Business Logic

Information systems are systems for the collection, organization, storage, and communication of information. Information systems aim to support operations, management and decision-making. In order to do this, these systems filter and process data according to business logic to create new data. Typically these information systems contain large...

We Should Stop Claiming Generality in Our Domain-Specific Language Papers

Our community believes that new domain-specific languages should be as general as possible to increase their impact. However, I argue that we should stop claiming generality for new domain-specific languages. Instead, we should document how domain-specific language based software development is beneficial to the overall software development...

PixieDust: Declarative Incremental User Interface Rendering Through Static Dependency Tracking

Modern web applications are interactive. Reactive programming languages and libraries are the state-of-the-art approach for declaratively specifying these interactive applications. However, programs written with these approaches contain error-prone boilerplate code for efficiency reasons. In this paper we present PixieDust, a declarative user...

Migrating Business Logic to an Incremental Computing DSL: A Case Study

To provide empirical evidence to what extent migration of business logic to an incremental computing language (ICL) is useful, we report on a case study on a learning management system. Our contribution is to analyze a real-life project, how migrating business logic to an ICL affects information system validatability, performance, and...

IceDust 2: Derived Bidirectional Relations and Calculation Strategy Composition (Artifact)

IceDust 2: Derived Bidirectional Relations and Calculation Strategy Composition

Derived values are values calculated from base values. They can be expressed with views in relational databases, or with expressions in incremental or reactive programming. However, relational views do not provide multiplicity bounds, and incremental and reactive programming require significant boilerplate code in order to encode bidirectional...

IceDust: Incremental and eventual computation of derived values in persistent object graphs

Derived values are values calculated from base values. They can be expressed in object-oriented languages by means of getters calculating the derived value, and in relational or logic databases by means of (materialized) views. However, switching to a different calculation strategy (for example caching) in object-oriented programming requires...

Unifying and Generalizing Relations in Role-Based Data Modeling and Navigation

Object-oriented programming languages support concise navigation of relations represented by references. However, relations are not first-class citizens and bidirectional navigation is not supported. The relational paradigm provides first-class relations, but with bidirectional navigation through verbose queries. We present a systematic analysis...

Pacman

This bachelor report describes the creation of a fun and informative robot game for the Science Centre Delft. The project entails simulating the classic Pacman computer game using real robots. One robot, Pacman, is controlled by a player and has to fulfil certain assignments. Simultaneously the other robots, monsters, try to catch Pacman. A...

Monitoring and management of environmental pollution based on macroparameters measured with sensors (Macrosense)

Trends in de berekening van grondkosten: Bijdragen aan de studiedag "trends in de berekening van grondkosten" op 27 mei 1997 te Ede georganiseerd door de Faculteit der Geodesie van de TU Delft

Diverse partijen hebben binnen of buiten de VINEX-Iocaties grond posities ingenomen. Het belang van grond als economische factor neemt daardoor toe. Dit zorgt er ook voor dat onderzoek, advisering en publieke meningsvorming op het gebied van de grondprijs vorming in beweging zijn. Zo worden er nieuwe thema's aan gesneden, andere hulpmiddelen...

Kostenbewust ontwerpen en kwaliteit; bijdragen aan de studiedag "kostenbewust ontwerpen en kwaliteit" op 22 november 1995 te Delft georganiseerd door de Faculteit der Geodesie van de TU Delft

De laatste tijd wordt veel aandacht besteed aan de kwaliteit van bouwlocaties. Het lijkt wel een toverwoord om nieuwe ontwikkelingen op gang te brengen. Met name daar waar de ambities ten aanzien van de kwaliteit hoog zijn levert dit de nodige complicaties op ten aanzien van het financiële aspect van de grondexploitatie. Zo moet men weten wat de...