APPLICATION OF SOFTWARE COMPLEX FOR QUERY PROCESSING IN THE DATABASE MANAGEMENT SYSTEM WITH NOVEL NOISE RESISTANT BISPECTRUM-ORGANIZED MODULATION TECHNIQUE IN DIGITAL WIRELESS COMMUNICATION SYSTEMS

2013 ◽  
Vol 72 (18) ◽  
pp. 1639-1649 ◽  
Author(s):  
J. T. Astola ◽  
Karen O. Egiazarian ◽  
V. V. Naumenko ◽  
A. V. Totskiy
Keyword(s):  
Wireless Communication ◽  
Query Processing ◽  
Management System ◽  
Database Management ◽  
Communication Systems ◽  
Database Management System ◽  
Wireless Communication Systems ◽  
Software Complex ◽  
Modulation Technique

Comparison between NRZ/RZ Modulation Techniques for Upgrading Long Haul Optical Wireless Communication Systems

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Ahmed Nabih Zaki Rashed
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Signal To Noise Ratio ◽  
Electrical Signal ◽  
Wireless Communication Systems ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Modulation Technique ◽  
Transmission Distance ◽  
Modulation Techniques

AbstractThis study has presented the complete comparison non return to zero (NRZ) and return to zero (RZ) modulation techniques for upgrading long haul optical wireless communication systems. Electrical signal to noise ratio is measured. Q-ranges factor are measured at the receiver side for different transmission distance from 500 to 1000  km. As well as the performance parameters of optical wireless communication systems are estimated at different transmission data rates with possible maximum transmission distance. NRZ modulation technique has outlined better performance than RZ modulation technique for upgrading optical wireless communication systems.

A Physical Design Strategy for Datasets with Multiple Dimensions

2017 ◽  
pp. 1-27
Author(s):  
Marlene Goncalves ◽  
José N. Mendoza
Keyword(s):  
Query Processing ◽  
Management System ◽  
Database Management ◽  
Processing Time ◽  
Statistical Tests ◽  
Design Strategy ◽  
Physical Design ◽  
Database Management System ◽  
Multiple Dimensions ◽  
Percentage Improvement

Since the huge volume of data that is generated today, businesses need to have tools to efficiently manage such data. MonetDB is a column-oriented database management system which has shown to have better query processing time with respect to row-oriented systems. The main objective of this chapter is to propose a physical design strategy that improves query execution times in MonetDB. The proposed physical design strategy was empirically studied for 18 TPC-H queries. The experiments were conducted on the basis of cold cache. Each of the queries were executed first using the proposed physical design strategy in this work and then without any physical design. The reported results show that the runtimes using physical design strategy are better for all queries with a minimum percentage improvement of 29%. Also, they showed that the improvement was statistically significant by means of statistical tests.

Cardiological Database Management System as a Mediator to Clinical Decision Support

1996 ◽  
Vol 35 (01) ◽  
pp. 52-58 ◽  
Author(s):  
A. Mavromatis ◽  
N. Maglaveras ◽  
A. Tsikotis ◽  
G. Pangalos ◽  
V. Ambrosiadou ◽  
...  
Keyword(s):  
Management System ◽  
Database Management ◽  
Medical Information ◽  
Object Oriented ◽  
Medical Personnel ◽  
Database Management System ◽  
Ease Of Use ◽  
Medical Database ◽  
Analysis And Design ◽  
Object Oriented Design

AbstractAn object-oriented medical database management system is presented for a typical cardiologic center, facilitating epidemiological trials. Object-oriented analysis and design were used for the system design, offering advantages for the integrity and extendibility of medical information systems. The system was developed using object-oriented design and programming methodology, the C++ language and the Borland Paradox Relational Data Base Management System on an MS-Windows NT environment. Particular attention was paid to system compatibility, portability, the ease of use, and the suitable design of the patient record so as to support the decisions of medical personnel in cardiovascular centers. The system was designed to accept complex, heterogeneous, distributed data in various formats and from different kinds of examinations such as Holter, Doppler and electrocardiography.

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