The performance of a multiversion access method

1990 ◽  
Author(s):  
David Lomet ◽  
Betty Salzberg
Keyword(s):  
Access Method

scholarly journals Ready Access to Molecular Rotors Based on Boron Dipyrromethene Dyes-Coumarin Dyads Featuring Broadband Absorption

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 781
Author(s):  
Ernesto Enríquez-Palacios ◽  
Teresa Arbeloa ◽  
Jorge Bañuelos ◽  
Claudia I. Bautista-Hernández ◽  
José G. Becerra-González ◽  
...  
Keyword(s):  
Molecular Rotors ◽  
Fluorescence Signal ◽  
Access Method ◽  
Broadband Absorption ◽  
Boron Dipyrromethene ◽  
Conformational Freedom ◽  
Meso Position ◽  
Photophysical Study ◽  
Ready Access

Herein we report on a straightforward access method for boron dipyrromethene dyes (BODIPYs)-coumarin hybrids linked through their respective 8- and 6- positions, with wide functionalization of the coumarin fragment, using salicylaldehyde as a versatile building block. The computationally-assisted photophysical study unveils broadband absorption upon proper functionalization of the coumarin, as well as the key role of the conformational freedom of the coumarin appended at the meso position of the BODIPY. Such free motion almost suppresses the fluorescence signal, but enables us to apply these dyads as molecular rotors to monitor the surrounding microviscosity.

Selection of Access Method for a Set of Table Records in a Relational Databases

2020 ELEKTRO ◽  
2020 ◽  
Author(s):  
Aleksey I. Baranchikov ◽  
Pavel A. Baranchikov ◽  
Sergey I. Babaev ◽  
Andrey S. Tarasov
Keyword(s):  
Relational Databases ◽  
Access Method ◽  
Selection Of

scholarly journals Cache-efficient sweeping-based interval joins for extended Allen relation predicates

2021 ◽  
Author(s):  
Danila Piatov ◽  
Sven Helmer ◽  
Anton Dignös ◽  
Fabio Persia
Keyword(s):  
Data Structure ◽  
Experimental Evaluation ◽  
State Of The Art ◽  
Temporal Databases ◽  
Access Method ◽  
Wide Range ◽  
Interval Relation ◽  
Cache Efficient ◽  
Join Algorithms ◽  
Better Than

AbstractWe develop a family of efficient plane-sweeping interval join algorithms for evaluating a wide range of interval predicates such as Allen’s relationships and parameterized relationships. Our technique is based on a framework, components of which can be flexibly combined in different manners to support the required interval relation. In temporal databases, our algorithms can exploit a well-known and flexible access method, the Timeline Index, thus expanding the set of operations it supports even further. Additionally, employing a compact data structure, the gapless hash map, we utilize the CPU cache efficiently. In an experimental evaluation, we show that our approach is several times faster and scales better than state-of-the-art techniques, while being much better suited for real-time event processing.

A model for a generalized data access method

1974 ◽  
Author(s):  
Randall L. Frank ◽  
Koichi Yamaguchi
Keyword(s):  
Data Access ◽  
Access Method

New Percutaneous Access Method for Minimally Invasive Anterior Lumbosacral Surgery

2004 ◽  
Vol 17 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Andrew Cragg ◽  
Allen Carl ◽  
Flavio Casteneda ◽  
Curtis Dickman ◽  
Lee Guterman ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Access Method ◽  
Percutaneous Access

An OSGi-Based Adaptation Access of Machine Tools in the Cloud Manufacturing Environment

2021 ◽  
Author(s):  
Xiaobin Li ◽  
Chao Yin
Keyword(s):  
Information Acquisition ◽  
Machine Tools ◽  
Universal Access ◽  
Cloud Manufacturing ◽  
Manufacturing Environment ◽  
Access Method ◽  
Manufacturing Enterprises ◽  
Cloud Application ◽  
Key Enabling Technologies ◽  
Manufacturing Mode

Abstract Machine tools (MTs) are the core manufacturing resources for discrete manufacturing enterprises. In the cloud manufacturing environment, MTs are massive, heterogeneous, widely dispersed and highly autonomous, which makes it difficult for cloud manufacturing mode to be deeply applied to support the networked collaboration operation among manufacturing enterprises. Realizing universal access and cloud application of various MTs is an essential prerequisite to solve the above problem. In this paper, an OSGi-based adaptation access method of MTs is proposed. First, the MTs information description model in the cloud manufacturing environment is built. Then, an OSGi-based adaptation access framework of MTs is constructed, and key enabling technologies, including machine tool information acquisition and processing, Bundle and Subsystem construction, are studied. Finally, an application case is conducted to verify the effectiveness and feasibility of the proposed method.

Sign in / Sign up

Export Citation Format

Share Document