with frequent changes in individual prices) differs from inflation for "sticky-price goods" (those displaying infrequent price changes). Compared to the predictions of popular sticky price models, actual inflation rates are far more volatile and transient, particularly for sticky-price goods.

The ITU-R recommendations can be broadly described as a series of documents that specify the requirements of the various radio services with regard to the frequencies and other parameters of transmission, propagation, reception, etc., and also include studies pertaining to coordination with other services. The documents are written in a formal manner, and each one must be approved by all ITU-R study groups before it is adopted. Thus the recommendations provide a record of agreements that have been reached, upon which decisions of the ITU-R can be based. The formal nature of the recommendations, and the requirement that they be approved by all study groups of the ITU-R, help to maintain a basis for continuing progress in situations where opinions can differ widely. While the term “recommendation ” indicates that the conclusions reached are not strictly mandatory, within the ITU-R the recommendations carry heavy weight and results from many of them become incorporated into the radio regulations. Recommendations are assigned numbers, and the full reference to a recommendation is, for example: Recommendation ITU-R RA.769-1. Here, for brevity, we shall just use RA.769. RA indicates that this is a document in the radio astronomy

Abstract. Asymptotically cylindrical Ricci-flat manifolds play a key role in

Abstract. Asymptotically cylindrical Ricci-flat manifolds play a key role in

Abstract. The use of context is important in interactive applications. It is particularly important for applications where the user’s context is changing rapidly, such as in both handheld and ubiquitous computing. In order to better understand how we can use context and facilitate the building

to obtain the 3-billion-base human genome sequence by the target date of 2005. To reach this goal, improved automation will be essential, and it is particularly important that human involvement in sequence data processing be significantly reduced or eliminated. Progress in this respect will require both

and the first control in this sequence is applied to the plant. An important advantage of this type of control is its ability to cope with hard constraints on controls and states. It has, therefore, been widely applied in petro-chemical and related industries where satisfaction of constraints is particularly

. Our results are based on the observation that the concentration of the performance of the decoder around its average performance, as observed by Luby et al. [1] in the case of a binary-symmetric channel and a binary message-passing algorithm, is a general phenomenon. For the particularly important

of block propagation, and, thus, makes the distribution more efficient. This is particularly important in large unstructured overlay networks, where the nodes need to make decisions based on local information only. We compare network coding to other schemes that transmit unencoded information (i.e. blocks

Similarity is an important and widely used concept. Previous definitions of similarity are tied to a particular application or a form of knowledge representation. We present an informationtheoretic definition of similarity that is applicable as long as there is a probabilistic model. We demonstrate