Calculating S-Parameters and Uncertainties of Coaxial Air-Dielectric Transmission Lines

Closed-form solutions are presented for calculating the reflection coefficient with corresponding uncertainty of metrology-grade 3.5 mm air-dielectric coaxial transmission lines for use as reference standards in S-parameter measurements up to 33 GHz. The closed-form solutions allow the calculation of the sensitivity coefficients required for...

Fear of Missing Out: Constrained Trial of Blockchain in Supply Chain

Blockchain’s potential to revolutionize supply chain and logistics with transparency and equitable stakeholder engagement is significant. However, challenges like scalability, privacy, and interoperability persist. This study explores the scarcity of real-world blockchain implementations in supply chain and logistics since we have not witnessed...

Internet of Things for building façade traceability: A theoretical framework to enable circular economy through life-cycle information flows

Traceability is considered a crucial requirement to enable Circular Economy (CE). Product and process life-cycle data can facilitate circular asset management preserving the asset's value over time and reducing resource consumption. Many scholars point out how the loss of traceability data, lacking information reliability, and unstructured...

Boundary conditions for traceability in food supply chains using blockchain technology

Traceability of ingredients in food supply chains has become paramount in a world in which markets become global, heterogeneous, and complex and in which consumers expect a high level of quality. The food supply chain consists of many organizations having different interests and are often reluctant to share traceability information with each...

Tip-on-a-chip: Automatic dotting with glitter ink pen for individual identification of tiny parts

This paper presents a new identification system for tiny parts that have no space for applying conventional ID marking or tagging. The system marks the parts with a single dot using ink containing shiny particles. The particles in a single dot naturally form a unique pattern. The parts are then identified by matching microscopic images of...

Traceability: A tool for the valorization of secondary materials in the Flemish region

The European Circular Economy Package focusses on construction and demolition and wants to identify and increase the recovery of valuable materials. A densely populated area such as Flanders, with no space for landfills and hence very high landfill taxes is driven towards recycling and reuse. Flanders is one of the leading regions when it comes...

FEVER: Extracting Feature-oriented Changes from Commits

The study of the evolution of highly configurable systems requires a thorough understanding of thee core ingredients of such systems: (1) the underlying variability model; (2) the assets that together implement the configurable features; and (3) the mapping from variable features to actual assets. Unfortunately, to date no systematic way to...

BlueSky ATC Simulator Project: An Open Data and Open Source Approach

To advance ATM research as a science, ATM research results should be made more comparable. A possible way to do this is to share tools and data. This paper presents a project that investigates the feasibility of a fully open-source and open-data approach to air traffic simulation. Here, the first of the two main challenges is to achieve a high...

High-accuracy absolute distance measurement with a mode-resolved optical frequency comb

Optical interferometry enables highly accurate non-contact displacement measurement. The optical phase ambiguity needs to be resolved for absolute distance ranging. In controlled laboratory conditions and for short distances it is possible to track a non-interrupted displacement from a reference position to a remote target. With large...

Measuring compliance during aircraft (Component) redeliveries at KLM engineering & maintenance

Aircraft and aircraft components are redelivered to the next operator or owner during the phase-out process. During this process the operator is required by law and contract requirements to show compliance with maintenance procedures. At KLM E&M the phase-out documentation process is under increasing scrutiny as the number of aircraft...

Adaptive User Feedback for IR-Based Traceability Recovery

Trace ability recovery allows software engineers to understand the interconnections among software artefacts and, thus, it provides an important support to software maintenance activities. In the last decade, Information Retrieval (IR) has been widely adopted as core technology of semi-automatic tools to extract trace ability links between...

Serving the Poor: Designing a Mobile Service Platform for Smallholder Farmer Inclusion in Global Value Chains

The starting point for this research was the rapid proliferation of mobile devices, which had covered 95% of the world’s population by 2014. This research addresses the role of multi-sided mobile service platforms in improving the lives of smallholder farmers, who make up a large proportion of the world’s poor. The mobile phone has the potential...

An Approach for Asynchronous Awareness Support in Collaborative Non-Linear Storytelling

Workspace awareness support is mandatory for group support systems. It allows users not only to follow actions of others, but to understand and respond to any changes others make to the workspace. In this paper, we present a novel approach for asynchronous awareness support by offering different filters to retrieve relevant awareness information...

A secure distance-based RFID identification protocol with an off-line back-end database

The design of a secure RFID identification scheme is a thought-provoking challenge, and this paper deals with this problem adopting a groundbreaking approach. The proposed protocol, called Noent, is based on cryptographic puzzles to avoid the indiscriminate disclose of the confidential information stored on tags and on an innovative role...

An Industrial Case Study in Reconstructing Requirements Views

Preprint of article published in: Empirical Software Engineering (Springer), 13 (6), 2008; doi:10.1007/s10664-008-9078-4 Requirements views, such as coverage and status views, are an important asset for monitoring and managing software development projects. We have developed a method that automates the process of reconstructing these views, and...

An industrial case study in reconstructing requirements views

Requirements views, such as coverage and status views, are an important asset for monitoring and managing software development projects. We have developed a method that automates the process of reconstructing these views, and we have built a tool, REQANALYST, that supports this method. This paper presents an investigation as to which extent...

Reconstructing Requirements Traceability in Design and Test Using Latent Semantic Indexing

Managing traceability data is an important aspect of the software development process. In this paper we define a methodology, consisting of six steps, for reconstructing requirements views using traceability data. One of the steps concerns the reconstruction of the traceability data. We investigate to what extent Latent Semantic Indexing (LSI),...