DEBATE ABOUT the increasing concentration of carbon dioxide (CO2) in the atmosphere, and fears that it will result in an intensification of the Greenhouse Effect and global warming, have spurred consideration of sustainable development. It has been claimed that technology to improve energy efficiency already exists that is cost-effective without consideration of the gains from abatement of carb...

Minimally invasive resection of lung cancer remains surprisingly uncommon in comparison to the adoption of similar techniques in other surgical disciplines. The reported use of video-assisted thoracic surgery (VATS) lobectomy for anatomic resections in comparison to open lobectomy ranges from 10% 40% even though it has been demonstrated to be equivalent in safety and accomplishes the same oncol...

background  to report normal variations of the limbal structures using in vivo laser scanning confocal microscopy. methods: this was a retrospective study of fourteen eyes from 11 healthy individuals. confocal imaging of cornea and limbus was performed using heidelberg retina tomograph iii rostock corneal module. results: the typical structure of the palisades of vogt (pov) was detected in 57% ...

In this paper we identify a lacuna in a proof in the paper by M. Caner published in 1997 in this Journal concerning the weak limit behavior of various expressions involving heavy-tailed multivariate vectors and the convergence of stochastic integrals. In a later paper (Caner, 1998) uses results for these limit relations to formulate tests for cointegration with infinite variance errors.

There are various lacuna and voids in clinical studies of glandular disorders and its warning or indication system in the study of palms of human beings. This paper presents for the first time, a datum and several observations made on the conditions of skin, colour mounts, lines etc. of human palms. Studies reveal that palms of both hands play a diagnostic role in medical emergency. The colour,...

The literature on environmental walkability to date has mainly focused on walking and related health outcomes. While previous studies suggest associations between walking and spatial knowledge, the associations between environmental walkability and spatial knowledge is yet to be explored. The current study addresses this lacuna in research by exploring children's mental representations of their...

Radical simpliication is an important part of symbolic computation systems. Zippel 7] gave a suucient condition for a nested radical to be expressed in terms of radicals of lower nesting depth. We ll a lacuna in his proof, and show that his suucient condition is also necessary. Previous work by Landau and Miller 4] leads to an algorithm for the problem.