Sandro Barone

Bio: Sandro Barone is an academic researcher from University of Pisa. The author has contributed to research in topics: Structured light & Photoelasticity. The author has an hindex of 20, co-authored 91 publications receiving 1284 citations. Previous affiliations of Sandro Barone include University of Sheffield.

Gear Geometric Design by B-Spline Curve Fitting and Sweep Surface Modelling

Abstract: In this paper, B-spline curve fitting and sweep surface generation are used for the geometric design of involute gears. Tooth profiles are described by a B-spline formulation based on interpolating data points with first and second derivative constrains. Tooth surfaces are generated by sweeping the B-spline profiles along specified trajectories. This representation scheme enables tooth shapes to be inter-actively controlled by manipulating control polygons and sweep trajectories. A CAD–CAE integration allows the analysis of contact and structural three-dimensional problems for various geometric configurations. In the paper, the methodology is applied to the geometric design of involute pinions of face gear drives.

A Biomedical Application Combining Visible and Thermal 3D Imaging

Abstract: This paper describes a non-invasive technology to allow early, accurate and quantitative detection of inflammation on the basis of the combination of visible 3D imaging technique and thermal imaging technique. In particular, the system is aimed at supporting the diagnosis and prognosis on pathologies producing ulceration and laceration, for example those caused by an advanced diabetes condition like the Diabetic Foot Disease (DFD). The analysis of absolute and relative temperature values can be a valuable support for an early diagnosis and the followup monitoring of diabetic patients. It is relevant that, when diabetes is well controlled it should be possible to avoid these foot problems, which can otherwise bring to the lower extremity amputation. The proposed system involves the integration of a 3D scanner to acquire geometrical data with an acquisition tool for thermal images. In particular, a 3D thermal image, which contains both the surface structure data and surface temperature distribution, is obtained by mapping the 2D thermography images on to 3D anatomical model. Both these characteristics support the evaluation of the ulceration, and the identification of anomalies or pathologic conditions. The technology has been experienced in medical environment on diabetic patients. The physicians confirmed that this prototype tool can be a valuable support in their work improving the quality of disease diagnosis and follow-up.

A Coded Structured Light System Based on Primary Color Stripe Projection and Monochrome Imaging

Abstract: Coded Structured Light techniques represent one of the most attractive research areas within the field of optical metrology. The coding procedures are typically based on projecting either a single pattern or a temporal sequence of patterns to provide 3D surface data. In this context, multi-slit or stripe colored patterns may be used with the aim of reducing the number of projected images. However, color imaging sensors require the use of calibration procedures to address crosstalk effects between different channels and to reduce the chromatic aberrations. In this paper, a Coded Structured Light system has been developed by integrating a color stripe projector and a monochrome camera. A discrete coding method, which combines spatial and temporal information, is generated by sequentially projecting and acquiring a small set of fringe patterns. The method allows the concurrent measurement of geometrical and chromatic data by exploiting the benefits of using a monochrome camera. The proposed methodology has been validated by measuring nominal primitive geometries and free-form shapes. The experimental results have been compared with those obtained by using a time-multiplexing gray code strategy.

Biomechanics of the press-fit phenomenon in dental implantology: an image-based finite element analysis

Abstract: Background A fundamental pre-requisite for the clinical success in dental implant surgery is the fast and stable implant osseointegration. The press-fit phenomenon occurring at implant insertion induces biomechanical effects in the bone tissues, which ensure implant primary stability. In the field of dental surgery, the understanding of the key factors governing the osseointegration process still remains of utmost importance. A thorough analysis of the biomechanics of dental implantology requires a detailed knowledge of bone mechanical properties as well as an accurate definition of the jaw bone geometry.

The Act of Creation

Abstract: While the study of psychology has offered little in the way of explaining the creative process, Koestler examines the idea that we are at our most creative when rational thought is suspended--for example, in dreams and trancelike states. All who read The Act of Creation will find it a compelling and illuminating book.

A review on stereolithography and its applications in biomedical engineering

Abstract: Stereolithography is a solid freeform technique (SFF) that was introduced in the late 1980s Although many other techniques have been developed since then, stereolithography remains one of the most powerful and versatile of all SFF techniques It has the highest fabrication accuracy and an increasing number of materials that can be processed is becoming available In this paper we discuss the characteristic features of the stereolithography technique and compare it to other SFF techniques The biomedical applications of stereolithography are reviewed, as well as the biodegradable resin materials that have been developed for use with stereolithography Finally, an overview of the application of stereolithography in preparing porous structures for tissue engineering is given