This paper studies an emerging class of software bugs called optimization-unstable code: code that is unexpectedly discarded by compiler optimizations due to undefined behavior in the program. Unstable code is present in many systems, including the Linux kernel and the Postgres database

This paper studies an emerging class of software bugs called optimization-unstable code: code that is unexpectedly eliminated by compiler optimizations due to undefined behavior in the program. This paper finds that such unstable code is present in many systems, including the Linux kernel

system. Using several embedded Java applications, this paper first studies the tradeoffs between reliability, performance, and memory space overhead for two schemes that perform error checks at object and field granularities. We also study the impact of object characteristics (e.g., lifetime, re

troubleshooting of two scenarios that adversely impacted application response time: (1) an unknown competing workload, and (2) a file system consistency checker. By reducing the set of anomalous counters to examine to a dozen significant ones, CLUEBOX was able to guide a systems engineer towards identifying

S of subscribers. This paper focuses on a preliminary evaluation of dependability and performance figures of the GPRS, by analyzing its behavior during the contention phase where users compete for the channel reservation using a random access procedure. The presented work constitutes the first step towards

Web usage behavior of users have an impact on the development of a web-based application. Web usage analysis is therefore necessary so as to better serve the needs of a web-based application. The process involves analyzing interaction of a user with a web application. Web usage analysis provides

changes in affective state to changes in the value of ACT-R's parameters so as to directly generate (i.e., predict) the influence of affect on cognition. The cognitive implications of the user's affective state are determined by analyzing the deviation of user behavior from the optimal path

unrealistic assumptions regarding voters' perception of postelection bargaining. (ii) The relative weight of the proximity component varies significantly across majoritarian and power sharing systems, and (iii) is additionally determined by party characteristics, i.e. party size, discipline and extremism

Biometric security is a topic of rapidly growing importance, especially as it applies to user authentication and key generation. In this paper, we describe our initial steps towards developing evaluation methodologies for behavioral biometrics that take into account threat models which have largely

) with Theory of Planned Behavior (TPB) to form a research model to understand and predict the users ' continuance intention toward self-service technologies. We used partial least square method to analyze the empirical data. This study found that the antecedents of TAM and TPB had the significant