Any software made available via TimeCenter is provided \as is " and without any express or implied warranties, including, without limitation, the implied warranty of merchantability and tness for a particular purpose. The TimeCenter icon on the cover combines two \arrows. " These \arrows " are letters in the so-called Rune alphabet used one millennium ago by the Vikings, as well as by their precedessors and successors, The Rune alphabet (second phase) has 16 letters. They all have angular shapes and lack horizontal lines because the primary storage medium was wood. However, runes may also be found on jewelry, tools, and weapons. Runes were perceived by many ashaving magic, hidden powers. The two Rune arrows in the icon denote \T " and \C, " respectively. Mobile computing has the potential for managing information globally. Data management issues in mobile computing have received some attention in recent times, and the design of adaptive broadcast protocols has been posed as an important problem. Such protocols are employed by database servers to decide on the content of broadcasts dynamically, in response to client

Any software made available via TimeCenter is provided \as is " and without any express or implied warranties, including, without limitation, the implied warranty of merchantability and tness for a particular purpose. The TimeCenter icon on the cover combines two \arrows. " These \arrows " are letters in the so-called Rune alphabet used one millennium ago by the Vikings, as well as by their precedessors and successors, The Rune alphabet (second phase) has 16 letters. They all have angular shapes and lack horizontal lines because the primary storage medium was wood. However, runes may also be found on jewelry, tools, and weapons. Runes were perceived by many ashaving magic, hidden powers. The two Rune arrows in the icon denote \T " and \C, " respectively. We present a temporal object data model, query language and system that support temporal database applications. We then show how equivalent temporal constructs and operations could be provided in existing object-oriented database management systems (OODBMS) and describe how we did this in the O2 system. A comparison of the two resulting systems highlights the current

Any software made available via TIMECENTER is provided “as is ” and without any express or implied warranties, including, without limitation, the implied warranty of merchantability and fitness for a particular purpose. The TIMECENTER icon on the cover combines two “arrows. ” These “arrows ” are letters in the so-called Rune alphabet used one millennium ago by the Vikings, as well as by their precedessors and successors, The Rune alphabet (second phase) has 16 letters. They all have angular shapes and lack horizontal lines because the primary storage medium was wood. However, runes may also be found on jewelry, tools, and weapons. Runes were perceived by many as having magic, hidden powers. The two Rune arrows in the icon denote “T ” and “C, ” respectively. We investigate the computational complexity of mining certain trends in temporal databases. A simple example of such trend might be “In general, salaries of employees do not decrease. ” The trends considered are formalized by the construct of trend dependency (TD). TD’s can compare attributes over time by using operators of f<; =;>; ; 6=g. TD satisfaction is characterized by a support and confidence. AsTD’smayexpress meaningful trends, mining them is significant. The TD mining problem studied is the following task: Given a

Any software made available via TIMECENTER is provided “as is ” and without any express or implied warranties, including, without limitation, the implied warranty of merchantability and fitness for a particular purpose. The TIMECENTER icon on the cover combines two “arrows. ” These “arrows ” are letters in the so-called Rune alphabet used one millennium ago by the Vikings, as well as by their precedessors and successors. The Rune alphabet (second phase) has 16 letters, all of which have angular shapes and lack horizontal lines because the primary storage medium was wood. Runes may also be found on jewelry, tools, and weapons and were perceived by many as having magic, hidden powers. The two Rune arrows in the icon denote “T ” and “C, ” respectively. 0 External dynamic hashing has been used in traditional database systems as a fast method to answer membership queries. Given a dynamic set S of objects, a membership query asks whether an object with identity k is in the most current S. This paper addresses the more general problem of Temporal Hashing. In this setting changes to the dynamic set are timestamped and the membership query has a temporal

Any software made available via TIMECENTER is provided “as is ” and without any express or implied warranties, including, without limitation, the implied warranty of merchantability and fitness for a particular purpose. The TIMECENTER icon on the cover combines two “arrows. ” These “arrows ” are letters in the so-called Rune alphabet used one millennium ago by the Vikings, as well as by their precedessors and successors, The Rune alphabet (second phase) has 16 letters. They all have angular shapes and lack horizontal lines because the primary storage medium was wood. However, runes may also be found on jewelry, tools, and weapons. Runes were perceived by many as having magic, hidden powers. The two Rune arrows in the icon denote “T ” and “C, ” respectively. Coalescing is a unary operator applicable to temporal databases; it is similar to duplicate elimination in conventional databases. Tuples in a temporal relation that agree on the explicit attribute values and that have adjacent or overlapping time periods are candidates for coalescing. Uncoalesced relations can arise in many ways, e.g., via a projection or union operator, or by not enforcing coalescing on update or insertion. In this paper we show how semantically superfluous coalescing can be eliminated. We then turn to efficiently performing coalescing. We

This article discusses the appropriateness of western bioethics in the African setting. It focuses on the decision-making process regarding participation in health research as a contested boundary in international bioethics discourse. An ethnomethodological approach is used to explain African

Voucher program, formerly Section 8, can rent units in the private market and are not tied to public housing projects in a specific neighborhood. We would expect vouchers to help poor families leave the ghetto and move to more diverse communities with higher socio-economic opportunity, but many voucher holders remain concentrated in poor, segregated communities. We use longitudinal qualitative data from one hundred low-income African American families in Mobile, Alabama, to explore this phenomenon, finding that ten-ants ’ limited housing search resources, involuntary mobility, landlord practices, and several aspects of the voucher program itself limit families ’ ability to escape disadvantaged areas. We also find that the voucher program’s regulations and funding structures do not incentivize housing authorities to promote neighbor-hood mobility and residential choice. This combination of forces often keeps voucher recipients in neighbor-hoods with high concentrations of poor and minority residents.

Previous research has shown that trait concepts and stereotypes become active automatically in the presence of relevant behavior or stereotyped-group features. Through the use of the same priming procedures as in previous impression formation research, Experiment l showed that participants whose

This article proposes a framework relevant to the continuous learning of individuals and organizations. Drawing from the theory of experiential learning, the article proposes conversational learning as the experiential learning process occurring in conversation as learners construct meaning from

that factors from skill situa-tions (competition, choice, familiarity, involvement) introduced into chance situations cause individuals to feel inappropriately confident. In Study 1 sub-jects cut cards against either a confident or a nervous competitor; in Study 2 lottery participants were or were not given a