Abs t r ac t . The number of non isomorphic solutions of the eikonal equation can be infinite. We show that there can exist a whole family of non isomorphic solutions, indexed by a continuous parameter. This implies, first, that the general problem of shape from shading can be ill-posed when no additional condition on the shape is imposed. This is in contradiction with what is sometimes stated ...

Psoriasis is a common chronic inflammatory disease associated with serious comorbidities. In recent years, increased mortality due to cardiovascular disease (myocardial infarction and stroke) has been documented in patients with severe psoriasis. Patients with psoriasis have a higher prevalence of traditional cardiovascular risk factors such as diabetes, hypertension, dyslipidemia and obesity, ...

The Hindley-Milner (HM) type system automatically infers the types at which polymorphic functions are used. In HM, the inferred types are unambiguous, and every expression has a principal type. However, type inference is sometimes unwieldy or impossible, especially in the presence of type system extensions such as type classes and typelevel functions. Even here, programmers cannot provide type ...

The visible symmetric L-groups are a refinement of the symmetric L-groups of Mishchenko [12] and Ranicki [15]. They are much easier to compute, although they hardly differ from the symmetric L-groups in their formal properties. Cappell and Shaneson [3] use the visible symmetric L-groups in studying 4-dimensional s-cobordisms; see also Kwasik and Schultz [8]. The visible symmetric L-groups are r...

Visible light communication (VLC) is an optical wireless communication technology that uses low-power light-emitting diodes (LEDs) to not only provide light, but also broadcast data [1–3]. LEDs are extremely energy-efficient and are expected to become widespread in general lighting applications. Because LEDs are solid-state lighting devices, they can be modulated at high speed compared to other...

Visible Patterns of Sound: RALPH K. PoTTER .i............ 463 M. SELLE. Concerning the Term "Race Differences " and the Concept " Culture ": DR. C. W. Obituary: WEIANT . ... ..... 484 Walter Bradford Cannon: DL CEcm K. DRINKER. Deaths and Memorials ................ 470 Scientific Books: Mainsprings of Civillation: Dli. WARRAIN S. Scientific Events: THOMPSON. Physical Geology: DR. HARRY S. Nucle...

Given the importance of visible information in face-toface communication, visible speech synthesis is being developed to control and manipulate visible speech. Experiments have shown that this visible speech is particularly important when the auditory speech is degraded, because of noise, bane:width filtering, or hearing impairment (Massaro, 1987). The strong influence of visible speech is not ...

Thirty years ago I was a young postdoc working with Larry Weiskrantz at the Department of Experimental Psychology in Oxford. The laboratory (or cubbyhole) where I worked was some distance from the main department and, perhaps because of this, our little group of postdocs and graduate students developed a strong sense of camaraderie. We spent many of our lunch hours arguing science, politics and...

This paper presents a system for the exploration of projected interfaces. We describe our Visible Imagination (VI) platform combining a camera, projector and torch (flashlight) allowing interaction with the torchlight and shape capture. We describe six application sketches that demonstrate different interaction styles using the platform, reflecting on their success and how they may be applied t...

The visible light communication (VLC) refers to the communication technology which utilizes the visible light source as a signal transmitter, the air as a transmission medium, and the appropriate photodiode as a signal receiving component. The visible light communication technology has a short history compared with other communication technology, for example, public old telephone service, Ether...