Selffield losses and selffield stability of superconducting wires with low conductivity matrix material

The influence of the normal material in a superconducting wire on the selffield losses has been investigated. The results show that the contribution of the normal material is considerable in the case of a highly conductive material like Cu. Measurements on wires with CuNi-material show no significant contribution of the normal material to the losses. In the latter case, however, special attention should be paid to stability. Measurements show that the obtainable maximum current under a.c. conditions obeys the adiabatic stability criterion rather well. The dependence of the maximum current amplitude on the critical current density and the diameter of the wire has been obtained. Wires with Al cores inside the NbTi filaments for better stabilization have also been investigated regarding maximum current and selffield losses

Flux penetration and a.c. losses in type II superconductors : II. Experiments on Nb-50% Ti

The a.c. behaviour of Nb-50% Ti can be described in terms of the quasi-static Critical State Model. The critical current density jc as a function of position and magnetic induction as well as the Ben(Ba) and Bex(Ba) relations which described the surface screening currents have been determined experimentally with the help of trapezoidal a.c. fields. The results are in agreement with the calculated induced voltage waveforms presented in part I

A.C. loss contributions of the transport current and transverse field caused by combined action in a multifilamentary wire

A.c. losses caused by an a.c. transport current and a transverse a.c. magnetic field during simultaneous action were measured. The loss contributions have been obtained separately. The measurements were performed on a NbTi multifilamentary wire having a CuNi matrix of low conductivity in order to prevent eddy currents. The test configuration is presented and measurement results as well as theoretical confirmation are dealt with

Dc and ac behaviour of a normal joint in a superconducting cable

The application of joints which can be disassembled is studied within the framework of the development of high current (25 kA), high power (0.5 kW) cryogenic current supplies (flux pumps).1,2 The behaviour of a scale model with currents up to 5 kA will be presented here.\ud \ud Several means of diminishing the joint resistance have been researched with special attention being paid to detection methods to measure the resistance, and their accuracies.\ud \ud The role of the solder has been investigated. A simple model gives good qualitative understanding of the matter.\ud \ud The presence of ac currents in a cryogenic current supply causes considerably higher losses in the joint because of the non-homogeneous distribution of the current. A good impression of this distribution can be obtained by measuring the field along the joint. The measured results are in good agreement with calculated ones. A useful length of the joint under ac conditions can be defined and is helpful for design purposes

Control Mechanisms for Assessing the Quality of Handmade and Artistic Products in e-Marketplace Platforms

Selling handmade and artistic goods online is challenging since buyers need to be able to assess product quality before purchase. This study aims to explore how control mechanisms aid the assessment of the product quality of handmade and artistic goods. We do so by extracting control mechanisms for e-marketplace platforms from existing literature and discussing to what extent these are suitable for handmade and artistic goods. We found that existing literature mainly focuses on reputation systems. We reshaped the findings by conducting desk research to identify how control mechanisms are applied in a number of e-marketplaces. Our results show that in e-marketplaces that focus on selling handmade artistic products, a reputation system is not sufficient to ensure product quality in an online environment. Thus, it is critical to apply other control mechanisms which are more effective in increasing the trustworthiness of the seller of artistic and handmade goods. Last, we also suggest alternative control mechanisms to be explored in future research

Rethinking consumers\u27 data sharing decisions with the emergence of multi-party computation: an experimental design for evaluation

Consumers are increasingly reluctant to share their personal data with businesses due to mounting concerns over privacy and control. Emerging privacy-enhancing technologies like multi-party computation (MPC), which allows generating insights while consumers retain data control, are challenging the current understanding of why consumers share their data. In this research-in-progress paper, we develop and evaluate an instrument and experimental design to investigate the impact of MPC on consumers’ willingness to share data and its antecedents. Preliminary analysis from a pre-study (N=300) indicates a good fit for our model. Also, MPC enhances consumers’ control and trust while reducing privacy concerns and risk, ultimately increasing data sharing willingness. The findings suggest that privacy-enhancing technologies significantly affect both the willingness to share data itself and its typical antecedents. The next step will conduct a large-scale online experiment using the developed instruments to evaluate further the impact of MPC on consumers’ willingness to share data

Designing business model tooling for business model exploration: An experimental design for evaluation

Disruptive technologies drive enterprises to rethink how to create and capture value by revising their business models (BM). Even in cases that the need for BM innovation is clear, how entrepreneurs can do it and what they need to be changed it is not always obvious. That leads to the need for BM exploration. BM tooling can support this process, however, existing BM tools are not widely focused on the BM exploration. In previous steps of our research, we designed and developed a digital tooling for BM exploration. This RiP paper presents the experimental design we plan to use to evaluate the effects of the tooling on the BM exploration. Initial results and future steps are discussed. We expect to contribute to the BM literature by understanding what features of BM tooling contribute to BM exploration

Smart Home: Aligning Business Models and Providers Processes; A case survey

Smart Home projects require product, service and business model innovation by organizations from multiple sectors. A considerable number of Smart Home projects, however, fail to live up to expectations and to commercialize their services. Business models that enable these projects have to be viable and feasible for the project as a whole as well as for individual involved providers. Moreover, the processes of involved providers have to be aligned, and exchange of information and value has to be well defined. In this paper, we propose three alignment domains that address the operational interactions between the involved providers. Based on a case survey it can be concluded that insufficient attention is paid to the alignment of Business Model as well as to Business Processes between involved providers, who are an essential to service innovation in a value network