The Newton MessagePad Personal Digital Assistant (PDA) is the first in a class of devices distinguished by their pen-based user interface, communications capability, small size, and low cost. A PDA operating system needs to support the simultaneous demands of user interface, applications, and communications. It must operate in an environment that has little main memory, no secondary storage, an...

Digital data generation is increasing exponentially, and estimates suggest that the amount of new data being generated each year has already surpassed the data storage capacity of current technologies. DNA presents an alternative technology for the storage of digital information due to several attractive properties. DNA is an extremely stable molecule, it takes up very little physical space, an...

Motivation: The current data growth and consequent increase in complexity of its usage patterns indicate that intelligent management of data storage is becoming ever more crucial [7, 20, 23]. We rely on the claim that efficient pattern discovery and description, coupled with the observed predictability of complex patterns within many high-performance applications, offers significant potential t...

Probe-based storage, also known as micro-electric mechanical systems (MEMS) storage, is a new technology that is emerging to bypass the fundamental limitations of disk drives. The design space of such devices is particularly interesting because we can architect these devices to different design points, each with different performance characteristics. This makes it more difficult to understand h...

Automata theory has given rise to a variety of automata models that consist of a finite-state control and an infinite-state storage mechanism. The aim of this work is to provide insights into how the structure of the storage mechanism influences the expressiveness and the analyzability of the resulting model. To this end, it presents generalizations of results about individual storage mechanism...

In this paper we present some preliminary performance evaluations of the Block Based Compression Storage (BBCS) scheme, that consists of a sparse matrix representation format and an associated Vector Processor (VP) architectural extension, designed to alleviate the performance degradation experienced by VPs when operating on sparse matrices. In particular we address the execution of Sparse Matr...

In a hierarchical structure, a user in a security class has access to information items of another class if and only if the former class is a predecessor of latter. Based upon cryptographic techniques, several schemes have been proposed for solving the problem of access control in hierarchical structures. In this paper, we propose a new scheme for an access control in tree structural hierarchie...

Amorphous materials are inherently unstable and tend to crystallize upon storage. In this study, we investigated the extent to which the physical stability and inherent crystallization tendency of drugs are related to their glass-forming ability (GFA), the glass transition temperature (Tg) and thermodynamic factors. Differential scanning calorimetry was used to produce the amorphous state of 52...