We present PVSio-web which extends the simulation component of the PVS proof system with functionalities for rapid prototyping device user interfaces. The tool presents itself as a classic image-editing environment with functionalities such as area selection and hyperlink creation, thus reducing the barriers that prevent non-experts in formal methods from using PVS. Designers load a picture of ...

Fruit is a new user interface toolkit based on a formal model of user interfaces. This formal basis enables us to write simple, concise executable specifications of interactive applications. This paper presents the Fruit model and several example specifications. We consider one example (a basic media controller) in detail, and contrast the executable specification style of Fruit with a more tra...

SPEEDY is an Eclipse-based IDE for exploring techniques that assist users in generating correct specifications, particularly including invariant inference algorithms and tools. It integrates with several back-end tools that propose invariants and will incorporate published algorithms for inferring object and loop invariants. Though the architecture is language-neutral, current SPEEDY targets C ...

The design of safety critical systems calls for advanced software engineering models, methods and tools in order to meet the safety requirements that will avoid putting human life at stake. When the safety critical system encompasses a substantial interactive component, the same level of confidence is required towards the human-computer interface. Conventional empirical or semi-formal technique...

Modern human machine interfaces provide a sophisticated structure and logic to ease their use. As they are the only mean to control the system behind, extensive testing and highest quality is required in the automotive domain. A common testing approach in literature is to derive the necessary test cases from a formal model. However, redundancy and data dependency still hinder manual modeling in...

Complex assortments of products and services offered by online selling platforms require the provision of sales support systems assisting customers in the product selection process. Knowledge-based recommenders are intelligent sales assistance systems which guide online customers through personalized sales dialogs and automatically determine products which conform to their needs and wishes. Suc...

Abstract. In this paper we investigate the heterogeneous multiscale methods (HMM) for interface tracking and apply the technique to the simulation of combustion fronts. Our goal is to overcome the numerical difficulties, which are caused by different time scales between the transport part and the reactive part in the model equations of some interface tracking problems, such as combustion proces...

We present partially penalized immersed finite element methods for solving parabolic interface problems on Cartesian meshes. Typical semi-discrete and fully discrete schemes are discussed. Error estimates in an energy norm are derived. Numerical examples are provided to support theoretical analysis.

An adaptive mesh refinement strategy is proposed in this paper for the Immersed Boundary and Immersed Interface methods for two-dimensional elliptic interface problems involving singular sources. The interface is represented by the zero level set of a Lipschitz function φ(x,y). Our adaptive mesh refinement is done within a small tube of |φ(x,y)|≤ δ with finer Cartesian meshes. The discrete line...

We present the self-paced 3-class Graz brain-computer interface (BCI) which is based on the detection of sensorimotor electroencephalogram (EEG) rhythms induced by motor imagery. Self-paced operation means that the BCI is able to determine whether the ongoing brain activity is intended as control signal (intentional control) or not (non-control state). The presented system is able to automatica...