Tags on subsets

Agents on RFID tags

On Mobile Bluetooth Tags

This paper presents a new approach for hyperlocal data sharing and delivery on the base of discoverable Bluetooth nodes. Our approach allows customers to associate user-defined data with network nodes and use a special mobile application (context-aware browser) for presenting this information to mobile users in proximity. Alternatively, mobile services can request and share local data in M2M ap...

SOME REMARKS ON GENERALIZATIONS OF MULTIPLICATIVELY CLOSED SUBSETS

Let R be a commutative ring with identity and Mbe a unitary R-module. In this paper we generalize the conceptmultiplicatively closed subset of R and we study some propertiesof these genaralized subsets of M. Among the many results in thispaper, we generalize some well-known theorems about multiplicativelyclosed subsets of R to these generalized subsets of M. Alsowe show that some other well-kno...

On Representatives of Subsets

1. Let a set S of raw things be divided into m classes of n things each in two distinct ways, (a) and (6); so that there are m (a)-classes and m (6)-classes. Then it is always possible to find a set B of m things of S which is at one and the same time a C.S.R. ( = complete system of representatives) for the (a)-classes, and also a C.S.R. for the (ft)-classes. This remarkable result was original...

On Random Shuffles & Subsets

Four simple algorithms are presented for producing a random rearrangement of the values in an array X[1], X[2], ..., X[n] using a pseudorandom number generator. These range from one that is naive, inefficient, and biased to one that is elegeant, efficient, and unbiased. By taking the first k entries in X one obtains a random (ordered) subset of size k.