The Session Initiation Protocol (SIP) REFER extension as defined in RFC 3515 automatically establishes a typically short-lived event subscription used to notify the party sending a REFER request about the receiver’s status in executing the transaction requested by the REFER. These notifications are not needed in all cases. This specification provides a way to prevent the automatic establishment...

Standard lifetime distributions usually very place strong restrictions on the data as is well illustrated by their inability to produce bathtub curves, and thus to adequately interpret data with this character. Mudholkar et al. (1995) introduced the exponentiated-Weibull distribution and Xie et al. (2002) proposed the new Weibull extension distribution. The new Weibull extension distribution wi...

Segmentation and tracking of cells in long-term time-lapse experiments has emerged as a powerful method to understand how tissue shape changes emerge from the complex choreography of constituent cells. However, methods to store and interrogate the large datasets produced by these experiments are not widely available. Furthermore, recently developed methods for relating tissue shape changes to c...

We explain how some recent results on the design of controls for nonoholomic systems without drift can be extended to some classes of sytems with drift. In particular, we show that a dynamic extension of a driftless system that satisses the Lie algebra rank condition necessary satisses algebraic suucient conditions for small-time local controllability at all its equilibrium points.

Although the role and meaning of cohabitation in family systems vary substantially across countries and subgroups, cohabitation has become more prevalent globally in recent decades. In Western countries it has come to resemble marriage (Bumpass 1990; Cherlin 2004; Kiernan 2001; Lesthaeghe 1995; van de Kaa 1987). Cohabitation in China, however, has seldom been studied—mainly owing to the lack of...

Abstract: We extend the boson process first to a large class of Cox processes and second an even larger class of infinitely divisible point processes. Density and moment results are studied in detail. These results are obtained in closed form as weighted permanents, so the extension is called a permanent process. Temporal extensions and a particularly tractable case of the permanent process are...

Some generalizations of the classical Hurewicz formula are obtained for extension dimension and C-spaces.

We present a theory of entrepreneurial entry and exit decisions. Knowing their own managerial talent, entrepreneurs decide which market to enter, where markets differ in size. We obtain a striking sorting result: each entrant in a large market is more efficient than any entrepreneur in a smaller market. The result obtains since competition is endogenously more intense in larger markets. The sor...

Donghui Xie , Peijuan Wang 2 and Qijiang Zhu 1 (1) State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing Applications, CAS.; Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities, Beijing Normal University; School of Geography and Remote Sensing Science, Beijing Normal University; 100875 (2) Chine...

the main purpose of this research was to investigate farmer’s attitude towards privatization of agricultural extension in shirgah district , mazandaran province. the statistical population consisted of 15300 farmers who inhabited as residents in 54 villages. using stratified proportional random sampling, 150 farmers (through cochran formula) were selected. the study revealed that 84% of farmers...