An Automated Storage and Retrieval System (AS/RS) operates a shuttle with computer process control to execute the storage and retrieval of warehouse stock. It can be equipped with the traditional single shuttle or the newly developed twin shuttle. There has been a significant literature on the comparison of single shuttle systems versus twin shuttle systems. Researchers agree that twin shuttle ...

Sensor networks collect data from their environment. Locations of the sensors are important attributes of that information and provide a context to understand, and use sensor data. In this chapter, we will discuss geometric ideas to organize sensor data using their locations. We will consider distributed methods for managing queries about isolated events, queries about mobile objects, and queri...

We provide an entropy analysis for light storage and light retrieval. In this analysis, entropy extraction and reduction in a typical light storage experiment are identified. The spatiotemporal behavior of entropy is presented for D1 transition in cold sodium atoms. The governing equations are the reduced Maxwell field equations and the Liouville–von Neumann equation for the density matrix of t...

Because the number of XML documents is dramatically increasing, we need to develop a multimedia information retrieval system which can support both the retrieval based on document structure and the retrieval based on image content. In order to support the structure-based retrieval, we design keyword, structure, element, and attribute index structures by indexing XML documents based on the basic...

purpose: this survey examines the view points of the librarians in the central libraries of the state universities of tehran on the necessity of continuing education (ce) courses. methodology: a questionnaire survey was conducted (76.7% response rate) to assess the requirement of continuing education (ce) courses. findings: the results showed that about 98% of the librarians believe that it nec...

A recycling object is in its recycle chain and its status may often change according to recycling stage or reusing status; even its structure could often dynamically change according to its reusing demand. Capturing the structure of recycling objects with a single uniform schema definition is hard and the conventional database management system would be inadequate to deal with this situation. M...

Information retrieval is the science concerned with the efficient and effective storage of information for the later retrieval and use by interested parties. During the last forty years, a plethora of information retrieval models and their variations have emerged. Logic-based models were launched to provide a rich and uniform representation of information and its semantics with the aim to impro...

The capacity has recently been characterized for the private information retrieval (PIR) problem as well as several of its variants. In every case it is assumed that all the queries are generated by the user simultaneously. Here we consider multiround PIR, where the queries in each round are allowed to depend on the answers received in previous rounds. We show that the capacity of multiround PI...