NoSQL databases offer a powerful and flexible means of querying non-relational data. However, leading NoSQL systems typically achieve high performance goals while minimizing support for traditional data management services and defying the establishment of solid formal models. In particular, the systems generally shun tools and design principles rendered conventional by the long history of RDBMS...

Recent advances in networking coupled with rapid advances in storage technologies are making it feasible to design a variety of sophisticated multimedia services, in which clients will not only access mundane services, such as television, radio, and telephones, but they will also have refreshing freedom to choose, procure, and personalize these services to suit their individual needs. In this p...

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authors point out that " Salt&Pepper " occurs in the rat, where there is no evidence for an ordered map of orien-relatively high density of singularities is always found 5568–5573. These findings are interesting because they show, for the first time, that singularities may be adaptive features whose role is to minimize wire length. (The authors do not say by how much, although presumably it wou...

Synopsis: At the Southern CaUfornia Co-operative Wind Tunnel, part of the need for rapid and accurate recording of instrument readings on tabular data sheets has been met by the development of a new automatic-translating device. This device has unusually low torque and is especially suhable for use with self-balancing potentiom­ eters. The device picks up the reading as a whole number and elect...

Whether the pointer recognition of an SF6 (sulfur hexafluoride) density controller is correct or not directly related to enterprise security. Therefore, a system that highly efficient, precise, and secure required. In this paper, we set up detection platform for efficient readings. To detect with high accuracy, propose dial angle method based on OpenCV obtains high-precision information. We the...

The Dial–A–Ride Problem with Transfers (DARPT) consists in defining a set of routes that satisfy transportation requests of users between a set of pickup points and a set of delivery points, in the presence of ride time constraints. Users may change vehicles during their trip. This change of vehicle, called a transfer, is made at specific locations called transfer points. Solving the DARPT invo...

In the classic Dial-a-Ride Problem, a server travels in some metric space to serve requests for rides. Each request has a source, destination, and release time. We study a variation of this problem where each request also has a revenue that is earned if the request is satisfied. The goal is to serve requests within a time limit such that the total revenue is maximized. We first prove that the v...

I nteractions mediated by photons are ubiquitous in physical systems. For instance, the van der Waals interaction between atoms in free space—variants of which play a fundamental role in many physical, chemical, and biological processes—is mediated by photons of the electromagnetic vacuum between the atoms. Interestingly, while this interaction is weak and decays with interatomic separation whe...

We give the first non-trivial approximation algorithm for the Capacitated Dial-a-Ride problem: given a collection of objects located at points in a metric space, a specified destination point for each object, and a vehicle with a capacity of at most k objects, the goal is to compute a shortest tour for the vehicle in which all objects can be delivered to their destinations while ensuring that t...