Results 21 to 30 of about 1,799,214 (312)

Nest and Unnest Operators in Nested Relations

open access: yesData Science Journal, 2008
By distinguishing nested attributes as Decomposable and Non-Decomposable, it is proved that for all nested relations, unnesting and then renesting on the same attribute yields the original relation subject only to the elimination of duplicate data ...
Georgia Garani
doaj   +1 more source

A Fragile Zero Watermarking Scheme to Detect and Characterize Malicious Modifications in Database Relations

open access: yesThe Scientific World Journal, 2013
We put forward a fragile zero watermarking scheme to detect and characterize malicious modifications made to a database relation. Most of the existing watermarking schemes for relational databases introduce intentional errors or permanent distortions as ...
Aihab Khan, Syed Afaq Husain
doaj   +1 more source

AKAP12 Expression in HER2-positive Breast Cancer and Its Clinical Significance

open access: yesZhongliu Fangzhi Yanjiu, 2020
Objective To investigate the expression of AKAP12 in HER2-positive breast cancer and its relation with clinicopathological factors and clinical significance.
CHENG Qian   +5 more
doaj   +1 more source

A micro-parametric survey on typological covariation related to focus marking strategies, based on the Bantu Morphosyntactic Variation database

open access: yesLinguistique et Langues Africaines, 2023
This paper discusses typological tendencies of focus marking strategies from a cross-Bantu perspective based on the Bantu Morphosyntactic Variation (BMV) database, a large-scale database of morphosyntactic variation of Bantu languages built around 142 ...
Daisuke Shinagawa, Lutz Marten
doaj   +1 more source

Marketing Impact on Diffusion in Social Networks

open access: yes, 2016
The paper proposes a way to add marketing into the standard threshold model of social networks. Within this framework, the paper studies logical properties of the influence relation between sets of agents in social networks.
Naumov, Pavel, Tao, Jia
core   +1 more source

What works for promoting health at school: Improving programs against the substance abuse [PDF]

open access: yes, 2017
The school is one of the most important contexts for carrying out health promotion programs related to the abuse of substances. Over the years, methods and intervention models have changed a great deal, both in relation to the evolution of health goals ...
Antonio Iudici   +5 more
core   +2 more sources

WATERMARKING SCHEME BASED ON MOST SIGNIFICANT BIT FOR PUBLIC COPYRIGHT PROTECTION FOR RELATIONAL DATABASES

open access: yesTạp chí Khoa học
The paper presents a watermarked scheme based on the most significant bit for public copyright protection for relational databases. A Watermark scheme could openly prove data copyright as often as desired.
Luu Thi Bich Huong
doaj   +1 more source

On the relation between Differential Privacy and Quantitative Information Flow [PDF]

open access: yes, 2011
Differential privacy is a notion that has emerged in the community of statistical databases, as a response to the problem of protecting the privacy of the database's participants when performing statistical queries.
A. Ghosh   +13 more
core   +7 more sources

Large-Scale Biomedical Relation Extraction Across Diverse Relation Types: Model Development and Usability Study on COVID-19

open access: yesJournal of Medical Internet Research, 2023
BackgroundBiomedical relation extraction (RE) is of great importance for researchers to conduct systematic biomedical studies. It not only helps knowledge mining, such as knowledge graphs and novel knowledge discovery, but also ...
Zeyu Zhang   +11 more
doaj   +1 more source

A New Optimized Model to Handle Temporal Data using Open Source Database

open access: yesAdvances in Electrical and Computer Engineering, 2017
The majority of the database applications now a days deal with temporal data. Temporal records are known to change during the course of time and facilities to manage the multiple snapshots of these records are generally missing in conventional ...
KUMAR, S., RISHI, R.
doaj   +1 more source

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