GraphTech Ecosystem - part 1: Graph DatabasesLinkurious
The graph ecosystem presentation lists and introduces a vast majority of storage systems for graph-like data: native graph databases, RDF databases, multi-model systems or systems with a graph API.
The relationships between data sets matter. Discovering, analyzing, and learning those relationships is a central part to expanding our understand, and is a critical step to being able to predict and act upon the data. Unfortunately, these are not always simple or quick tasks.
To help the analyst we introduce RAPIDS, a collection of open-source libraries, incubated by NVIDIA and focused on accelerating the complete end-to-end data science ecosystem. Graph analytics is a critical piece of the data science ecosystem for processing linked data, and RAPIDS is pleased to offer cuGraph as our accelerated graph library.
Simply accelerating algorithms only addressed a portion of the problem. To address the full problem space, RAPIDS cuGraph strives to be feature-rich, easy to use, and intuitive. Rather than limiting the solution to a single graph technology, cuGraph supports Property Graphs, Knowledge Graphs, Hyper-Graphs, Bipartite graphs, and the basic directed and undirected graph.
A Python API allows the data to be manipulated as a DataFrame, similar and compatible with Pandas, with inputs and outputs being shared across the full RAPIDS suite, for example with the RAPIDS machine learning package, cuML.
This talk will present an overview of RAPIDS and cuGraph. Discuss and show examples of how to manipulate and analyze bipartite and property graph, plus show how data can be shared with machine learning algorithms. The talk will include some performance and scalability metrics. Then conclude with a preview of upcoming features, like graph query language support, and the general RAPIDS roadmap.
Graph Data: a New Data Management FrontierDemai Ni
Graph Data: a New Data Management Frontier -- Huawei’s view and Call for Collaboration by Demai Ni:
Huawei provides Enterprise Databases, and are actively exploring the latest technology to provide end-to-end Data Management Solution on Cloud. We are looking at to bridge classic RDMS to Graph Database on a distributed platform.
Giraph++: From "Think Like a Vertex" to "Think Like a Graph"Yuanyuan Tian
To meet the challenge of processing rapidly growing graph and
network data created by modern applications, a number of distributed graph processing systems have emerged, such as Pregel and GraphLab. All these systems divide input graphs into partitions, and employ a “think like a vertex” programming model to support iterative graph computation. This vertex-centric model is easy to program and has been proved useful for many graph algorithms. However, this model hides the partitioning information from the users, thus prevents many algorithm-specific optimizations. This often results in longer execution time due to excessive network messages (e.g. in Pregel) or heavy scheduling overhead to ensure data consistency (e.g. in GraphLab). To address this limitation, we
propose a new “think like a graph” programming paradigm. Under this graph-centric model, the partition structure is opened up to the users, and can be utilized so that communication within a partition can bypass the heavy message passing or scheduling machinery. We implemented this model in a new system, called Giraph++, based on Apache Giraph, an open source implementation of Pregel. We explore the applicability of the graph-centric model to three categories of graph algorithms, and demonstrate its flexibility and superior performance, especially on well-partitioned data.
GraphTech Ecosystem - part 1: Graph DatabasesLinkurious
The graph ecosystem presentation lists and introduces a vast majority of storage systems for graph-like data: native graph databases, RDF databases, multi-model systems or systems with a graph API.
The relationships between data sets matter. Discovering, analyzing, and learning those relationships is a central part to expanding our understand, and is a critical step to being able to predict and act upon the data. Unfortunately, these are not always simple or quick tasks.
To help the analyst we introduce RAPIDS, a collection of open-source libraries, incubated by NVIDIA and focused on accelerating the complete end-to-end data science ecosystem. Graph analytics is a critical piece of the data science ecosystem for processing linked data, and RAPIDS is pleased to offer cuGraph as our accelerated graph library.
Simply accelerating algorithms only addressed a portion of the problem. To address the full problem space, RAPIDS cuGraph strives to be feature-rich, easy to use, and intuitive. Rather than limiting the solution to a single graph technology, cuGraph supports Property Graphs, Knowledge Graphs, Hyper-Graphs, Bipartite graphs, and the basic directed and undirected graph.
A Python API allows the data to be manipulated as a DataFrame, similar and compatible with Pandas, with inputs and outputs being shared across the full RAPIDS suite, for example with the RAPIDS machine learning package, cuML.
This talk will present an overview of RAPIDS and cuGraph. Discuss and show examples of how to manipulate and analyze bipartite and property graph, plus show how data can be shared with machine learning algorithms. The talk will include some performance and scalability metrics. Then conclude with a preview of upcoming features, like graph query language support, and the general RAPIDS roadmap.
Graph Data: a New Data Management FrontierDemai Ni
Graph Data: a New Data Management Frontier -- Huawei’s view and Call for Collaboration by Demai Ni:
Huawei provides Enterprise Databases, and are actively exploring the latest technology to provide end-to-end Data Management Solution on Cloud. We are looking at to bridge classic RDMS to Graph Database on a distributed platform.
Giraph++: From "Think Like a Vertex" to "Think Like a Graph"Yuanyuan Tian
To meet the challenge of processing rapidly growing graph and
network data created by modern applications, a number of distributed graph processing systems have emerged, such as Pregel and GraphLab. All these systems divide input graphs into partitions, and employ a “think like a vertex” programming model to support iterative graph computation. This vertex-centric model is easy to program and has been proved useful for many graph algorithms. However, this model hides the partitioning information from the users, thus prevents many algorithm-specific optimizations. This often results in longer execution time due to excessive network messages (e.g. in Pregel) or heavy scheduling overhead to ensure data consistency (e.g. in GraphLab). To address this limitation, we
propose a new “think like a graph” programming paradigm. Under this graph-centric model, the partition structure is opened up to the users, and can be utilized so that communication within a partition can bypass the heavy message passing or scheduling machinery. We implemented this model in a new system, called Giraph++, based on Apache Giraph, an open source implementation of Pregel. We explore the applicability of the graph-centric model to three categories of graph algorithms, and demonstrate its flexibility and superior performance, especially on well-partitioned data.
We all know good training data is crucial for data scientists to build quality machine learning models. But when productionizing Machine Learning, Metadata is equally important. Consider for example:
- Provenance of model allowing for reproducible builds
- Context to comply with GDPR, CCPA requirements
- Identifying data shift in your production data
This is the reason we built ArangoML Pipeline, a flexible Metadata store which can be used with your existing ML Pipeline.
Today we are happy to announce a release of ArangoML Pipeline Cloud. Now you can start using ArangoML Pipeline without having to even start a separate docker container.
In this webinar, we will show how to leverage ArangoML Pipeline Cloud with your Machine Learning Pipeline by using an example notebook from the TensorFlow tutorial.
Find the video here: https://www.arangodb.com/arangodb-events/arangoml-pipeline-cloud/
Knowledge graphs - it’s what all businesses now are on the lookout for. But what exactly is a knowledge graph and, more importantly, how do you get one? Do you get it as an out-of-the-box solution or do you have to build it (or have someone else build it for you)? With the help of our knowledge graph technology experts, we have created a step-by-step list of how to build a knowledge graph. It will properly expose and enforce the semantics of the semantic data model via inference, consistency checking and validation and thus offer organizations many more opportunities to transform and interlink data into coherent knowledge.
Generating Executable Mappings from RDF Data Cube Data Structure DefinitionsChristophe Debruyne
Data processing is increasingly the subject of various internal and external regulations, such as GDPR which has recently come into effect. Instead of assuming that such processes avail of data sources (such as files and relational databases), we approach the problem in a more abstract manner and view these processes as taking datasets as input. These datasets are then created by pulling data from various data sources. Taking a W3C Recommendation for prescribing the structure of and for describing datasets, we investigate an extension of that vocabulary for the generation of executable R2RML mappings. This results in a top-down approach where one prescribes the dataset to be used by a data process and where to find the data, and where that prescription is subsequently used to retrieve the data for the creation of the dataset “just in time”. We argue that this approach to the generation of an R2RML mapping from a dataset description is the first step towards policy-aware mappings, where the generation takes into account regulations to generate mappings that are compliant. In this paper, we describe how one can obtain an R2RML mapping from a data structure definition in a declarative manner using SPARQL CONSTRUCT queries, and demonstrate it using a running example. Some of the more technical aspects are also described.
Reference: Christophe Debruyne, Dave Lewis, Declan O'Sullivan: Generating Executable Mappings from RDF Data Cube Data Structure Definitions. OTM Conferences (2) 2018: 333-350
GraphTech Ecosystem - part 2: Graph AnalyticsLinkurious
The graph ecosystem presentation lists and introduces a vast majority of graph analytics actors: graph analytics frameworks; graph processing engines; graph analytics libraries and toolkits; graph query languages and projects.
Smarter content with a Dynamic Semantic Publishing PlatformOntotext
Personalized content recommendation systems enable users to overcome the information overload associated with rapidly changing deep and wide content streams such as news. This webinar discusses Ontotext’s latest improvements to its Dynamic Semantic Publishing (DSP) platform NOW (News on the Web). The Platform includes social data mining, web usage mining, behavioral and contextual semantic fingerprinting, content typing and rich relationship search.
Big Data
Hadoop
NoSQL databases and type: column oriented,document oriented, map based.
Map-reduce Example
Bigdata Analytics Case study
Case Study R
Retail and Finance Case Study
Geophy CTO Sander Mulders presented their Metadata platform at our March meetup at Skillsmatters' CodeNode. The talk was about how Geophy use Linked Data approaches to accelerate & improve the accuracy of real estate requirements such as valuations.
Sander talked about the thousands of data sources used, how they use RDF for data integration, how to construct features and metadata driven services using components such as Apache Kafka and Stardog.
It Don’t Mean a Thing If It Ain’t Got SemanticsOntotext
With the tons of bits of data around enterprises and the challenge to turn these data into knowledge, meaning is arguably in the systems of the best database holder.
Turning data pieces into actionable knowledge and data-driven decisions takes a good and reliable database. The RDF database is one such solution.
It captures and analyzes large volumes of diverse data while at the same time is able to manage and retrieve each and every connection these data ever get to enter in.
In our latest slides, you will find out why we believe RDF graph databases work wonders with serving information needs and handling the growing amounts of diverse data every organization faces today.
Fireside Chat with Bloor Research: State of the Graph Database Market 2020Cambridge Semantics
Sean Martin, CTO of Cambridge Semantics, Philip Howard, Research Director at Bloor Research and co-author of “Graph Database Market Update 2020”, and Steve Sarsfield, VP of Product at Cambridge Semantics, hold a fireside chat on the State of the Graph Database Market.
An overview about several technologies which contribute to the landscape of Big Data.
An intro about the technology challenges of Big Data, follow by key open-source components which help out in dealing with various big data aspects such as OLAP, Real-Time Online
Analytics, Machine Learning on Map-Reduce. I conclude with an enumeration of the key areas where those technologies are most likely unleashing new opportunity for various businesses.
What Factors Influence the Design of a Linked Data Generation Algorithm?andimou
Generating Linked Data remains a complicated and intensive engineering process. While different factors determine how a Linked Data generation algorithm is designed, potential alternatives for each factor are currently not considered when designing the tools’ underlying algorithms. Certain design patterns are frequently ap- plied across different tools, covering certain alternatives of a few of these factors, whereas other alternatives are never explored. Consequently, there are no adequate tools for Linked Data generation for certain occasions, or tools with inadequate and inefficient algorithms are chosen. In this position paper, we determine such factors, based on our experiences, and present a preliminary list. These factors could be considered when a Linked Data generation algorithm is designed or a tool is chosen. We investigated which factors are covered by widely known Linked Data generation tools and concluded that only certain design patterns are frequently encountered. By these means, we aim to point out that Linked Data generation is above and beyond bare implementations, and algorithms need to be thoroughly and systematically studied and exploited.
We all know good training data is crucial for data scientists to build quality machine learning models. But when productionizing Machine Learning, Metadata is equally important. Consider for example:
- Provenance of model allowing for reproducible builds
- Context to comply with GDPR, CCPA requirements
- Identifying data shift in your production data
This is the reason we built ArangoML Pipeline, a flexible Metadata store which can be used with your existing ML Pipeline.
Today we are happy to announce a release of ArangoML Pipeline Cloud. Now you can start using ArangoML Pipeline without having to even start a separate docker container.
In this webinar, we will show how to leverage ArangoML Pipeline Cloud with your Machine Learning Pipeline by using an example notebook from the TensorFlow tutorial.
Find the video here: https://www.arangodb.com/arangodb-events/arangoml-pipeline-cloud/
Knowledge graphs - it’s what all businesses now are on the lookout for. But what exactly is a knowledge graph and, more importantly, how do you get one? Do you get it as an out-of-the-box solution or do you have to build it (or have someone else build it for you)? With the help of our knowledge graph technology experts, we have created a step-by-step list of how to build a knowledge graph. It will properly expose and enforce the semantics of the semantic data model via inference, consistency checking and validation and thus offer organizations many more opportunities to transform and interlink data into coherent knowledge.
Generating Executable Mappings from RDF Data Cube Data Structure DefinitionsChristophe Debruyne
Data processing is increasingly the subject of various internal and external regulations, such as GDPR which has recently come into effect. Instead of assuming that such processes avail of data sources (such as files and relational databases), we approach the problem in a more abstract manner and view these processes as taking datasets as input. These datasets are then created by pulling data from various data sources. Taking a W3C Recommendation for prescribing the structure of and for describing datasets, we investigate an extension of that vocabulary for the generation of executable R2RML mappings. This results in a top-down approach where one prescribes the dataset to be used by a data process and where to find the data, and where that prescription is subsequently used to retrieve the data for the creation of the dataset “just in time”. We argue that this approach to the generation of an R2RML mapping from a dataset description is the first step towards policy-aware mappings, where the generation takes into account regulations to generate mappings that are compliant. In this paper, we describe how one can obtain an R2RML mapping from a data structure definition in a declarative manner using SPARQL CONSTRUCT queries, and demonstrate it using a running example. Some of the more technical aspects are also described.
Reference: Christophe Debruyne, Dave Lewis, Declan O'Sullivan: Generating Executable Mappings from RDF Data Cube Data Structure Definitions. OTM Conferences (2) 2018: 333-350
GraphTech Ecosystem - part 2: Graph AnalyticsLinkurious
The graph ecosystem presentation lists and introduces a vast majority of graph analytics actors: graph analytics frameworks; graph processing engines; graph analytics libraries and toolkits; graph query languages and projects.
Smarter content with a Dynamic Semantic Publishing PlatformOntotext
Personalized content recommendation systems enable users to overcome the information overload associated with rapidly changing deep and wide content streams such as news. This webinar discusses Ontotext’s latest improvements to its Dynamic Semantic Publishing (DSP) platform NOW (News on the Web). The Platform includes social data mining, web usage mining, behavioral and contextual semantic fingerprinting, content typing and rich relationship search.
Big Data
Hadoop
NoSQL databases and type: column oriented,document oriented, map based.
Map-reduce Example
Bigdata Analytics Case study
Case Study R
Retail and Finance Case Study
Geophy CTO Sander Mulders presented their Metadata platform at our March meetup at Skillsmatters' CodeNode. The talk was about how Geophy use Linked Data approaches to accelerate & improve the accuracy of real estate requirements such as valuations.
Sander talked about the thousands of data sources used, how they use RDF for data integration, how to construct features and metadata driven services using components such as Apache Kafka and Stardog.
It Don’t Mean a Thing If It Ain’t Got SemanticsOntotext
With the tons of bits of data around enterprises and the challenge to turn these data into knowledge, meaning is arguably in the systems of the best database holder.
Turning data pieces into actionable knowledge and data-driven decisions takes a good and reliable database. The RDF database is one such solution.
It captures and analyzes large volumes of diverse data while at the same time is able to manage and retrieve each and every connection these data ever get to enter in.
In our latest slides, you will find out why we believe RDF graph databases work wonders with serving information needs and handling the growing amounts of diverse data every organization faces today.
Fireside Chat with Bloor Research: State of the Graph Database Market 2020Cambridge Semantics
Sean Martin, CTO of Cambridge Semantics, Philip Howard, Research Director at Bloor Research and co-author of “Graph Database Market Update 2020”, and Steve Sarsfield, VP of Product at Cambridge Semantics, hold a fireside chat on the State of the Graph Database Market.
An overview about several technologies which contribute to the landscape of Big Data.
An intro about the technology challenges of Big Data, follow by key open-source components which help out in dealing with various big data aspects such as OLAP, Real-Time Online
Analytics, Machine Learning on Map-Reduce. I conclude with an enumeration of the key areas where those technologies are most likely unleashing new opportunity for various businesses.
What Factors Influence the Design of a Linked Data Generation Algorithm?andimou
Generating Linked Data remains a complicated and intensive engineering process. While different factors determine how a Linked Data generation algorithm is designed, potential alternatives for each factor are currently not considered when designing the tools’ underlying algorithms. Certain design patterns are frequently ap- plied across different tools, covering certain alternatives of a few of these factors, whereas other alternatives are never explored. Consequently, there are no adequate tools for Linked Data generation for certain occasions, or tools with inadequate and inefficient algorithms are chosen. In this position paper, we determine such factors, based on our experiences, and present a preliminary list. These factors could be considered when a Linked Data generation algorithm is designed or a tool is chosen. We investigated which factors are covered by widely known Linked Data generation tools and concluded that only certain design patterns are frequently encountered. By these means, we aim to point out that Linked Data generation is above and beyond bare implementations, and algorithms need to be thoroughly and systematically studied and exploited.
Neo4j is a powerful and expressive tool for storing, querying and manipulating data. However modeling data as graphs is quite different from modeling data under a relational database. In this talk, Michael Hunger will cover modeling business domains using graphs and show how they can be persisted and queried in Neo4j. We'll contrast this approach with the relational model, and discuss the impact on complexity, flexibility and performance.
Graph Database Management Systems provide an effective
and efficient solution to data storage in current scenarios
where data are more and more connected, graph models are
widely used, and systems need to scale to large data sets.
In this framework, the conversion of the persistent layer of
an application from a relational to a graph data store can
be convenient but it is usually an hard task for database
administrators. In this paper we propose a methodology
to convert a relational to a graph database by exploiting
the schema and the constraints of the source. The approach
supports the translation of conjunctive SQL queries over the
source into graph traversal operations over the target. We
provide experimental results that show the feasibility of our
solution and the efficiency of query answering over the target
database.
Designing and Building a Graph Database Application – Architectural Choices, ...Neo4j
Ian closely looks at design and implementation strategies you can employ when building a Neo4j-based graph database solution, including architectural choices, data modelling, and testing.g
Modelling differential clustering and treatment effect heterogeneity in paral...Karla hemming
Cluster randomized trials are frequently used in health service evaluation. It is common practice to use an analysis model with a random effect to combine between cluster information about treatment effects. It is increasingly being acknowledged that intervention effects might vary across clusters, or the variation between clusters might differ across the randomized arms. It has been proposed in both parallel cluster trials, stepped-wedge and other crossover designs that this heterogeneity can be allowed for by incorporating additional random effect(s) into the model. Here we show that the choice of model parameterization needs careful consideration as some parameterizations for additional heterogeneity induce unnecessary assumptions. We suggest more appropriate parameterizations, discuss their relative advantages and demonstrate the implications of these model choices using practical examples of a parallel cluster trial and a simulated stepped-wedge trial.
Frank Celler – Processing large-scale graphs with Google(TM) Pregel - NoSQL m...NoSQLmatters
Frank Celler – Processing large-scale graphs with Google(TM) Pregel
Many popular graph databases are optimized to run on a single machine, using efficient traversals to query the stored graphs. This boosts performance of algorithms originating at a single vertex and iterating through the graph e.g. finding shortest paths or neighbors. However, graphs are getting bigger and traversals are poorly performing if they require a large depth. If you need to distribute a large-scale graph thru several machines, traversals won't be the best choice (in case of performance) to process the graph. Therefore Google has released it's Pregel framework offering an environment to query distributed graphs, Pregel is also known as the map-reduce for graphs. In this talk I want to present the architecture and requirements of the Pregel framework and introduce you to the different mind-set required to write a Pregel algorithm. Furthermore I will give a short introduction to three implementations or Pregel — Giraph, TinkerPop3 and ArangoDB.
Experimenting with Google Knowledge Graph & How Can we Potentially use it in...Pritesh Patel
Presentation given at #be2campOxon organised by @ThirlwallAssoc about Google Knowledge Graph, what is it and how is it being used. I also used myself as an experiment to learn about how it works so that I could apply the same methodology to work out how Google Knowledge Graph could help us learn about buildings and provide us with data faster and more efficiently than other sources.
by Lukas Masuch, Henning Muszynski and Benjamin Raethlein
The Enterprise Knowledge Graph is a disruptive platform that combines emerging Big Data and Graph technologies to reinvent knowledge management inside organizations. This platform aims to organize and distribute the organization’s knowledge, and making it centralized and universally accessible to every employee. The Enterprise Knowledge Graph is a central place to structure, simplify and connect the knowledge of an organization. By removing complexity, the knowledge graph brings more transparency, openness and simplicity into organizations. That leads to democratized communications and empowers individuals to share knowledge and to make decisions based on comprehensive knowledge. This platform can change the way we work, challenge the traditional hierarchical approach to get work done and help to unleash human potential!
The Enterprise Knowledge Graph is a disruptive platform that combines emerging Big Data and Graph technologies to reinvent knowledge management inside organizations. This platform aims to organize and distribute the organization’s knowledge, and making it centralized and universally accessible to every employee. The Enterprise Knowledge Graph is a central place to structure, simplify and connect the knowledge of an organization. By removing complexity, the knowledge graph brings more transparency, openness and simplicity into organizations. That leads to democratized communications and empowers individuals to share knowledge and to make decisions based on comprehensive knowledge. This platform can change the way we work, challenge the traditional hierarchical approach to get work done and help to unleash human potential!
Ready to leverage the power of a graph database to bring your application to the next level, but all the data is still stuck in a legacy relational database?
Fortunately, Neo4j offers several ways to quickly and efficiently import relational data into a suitable graph model. It's as simple as exporting the subset of the data you want to import and ingest it either with an initial loader in seconds or minutes or apply Cypher's power to put your relational data transactionally in the right places of your graph model.
In this webinar, Michael will also demonstrate a simple tool that can load relational data directly into Neo4j, automatically transforming it into a graph representation of your normalized entity-relationship model.
Deep Learning - The Past, Present and Future of Artificial IntelligenceLukas Masuch
In the last couple of years, deep learning techniques have transformed the world of artificial intelligence. One by one, the abilities and techniques that humans once imagined were uniquely our own have begun to fall to the onslaught of ever more powerful machines. Deep neural networks are now better than humans at tasks such as face recognition and object recognition. They’ve mastered the ancient game of Go and thrashed the best human players. “The pace of progress in artificial general intelligence is incredible fast” (Elon Musk – CEO Tesla & SpaceX) leading to an AI that “would be either the best or the worst thing ever to happen to humanity” (Stephen Hawking – Physicist).
What sparked this new hype? How is Deep Learning different from previous approaches? Let’s look behind the curtain and unravel the reality. This talk will introduce the core concept of deep learning, explore why Sundar Pichai (CEO Google) recently announced that “machine learning is a core transformative way by which Google is rethinking everything they are doing” and explain why “deep learning is probably one of the most exciting things that is happening in the computer industry“ (Jen-Hsun Huang – CEO NVIDIA).
OUTCOME ANALYSIS IN ACADEMIC INSTITUTIONS USING NEO4Jijcsity
Databases are an integral part of a computing system and users heavily rely on the services they provide.When interact with a computing system, we expect that data be stored for future use, that the data is able to be looked up fastly, and we can perform complex queries against the data stored in the database. Many
different emerging database types available for use such as relational databases, object databases, keyvalue databases, graph databases, and RDF databases. Each type of database provides unique qualities that have applications in certain domains. Our work aims to investigate and compare the performance and
scalability of relational databases to graph databases in terms of handling multilevel queries such as finding the impact of a particular subject with the working area of pass out students. MySQL was chosen as the relational database, Neo4j as the graph database.
This is the presentation I did to the audience of EMJD-DC Spring Event 2017 Brussels to discuss my research. http://kkpradeeban.blogspot.be/2017/05/emjd-dc-spring-event-2017.html
AI, Knowledge Representation and Graph Databases - Key Trends in Data ScienceOptum
Knowledge Representation is a key focus for most modern AI texts. Many AI experts feel that over half of their work is understanding how to find the right knowledge structures to build intelligent agents that can continuously learn and respond to changing events in their world. In 2012, a paper published by Google started a consolidation of the many diverse forms of knowledge representation into a single general-purpose structure called a labeled property graph.
This talk will describe the key events behind this movement and show how a new generation of data scientist will be needed to build and maintain corporate knowledge graphs that contain a uniform, normalized and highly connected data sets for used by researchers and intelligent agents. We will also discuss the challenges of transferring siloed project-knowledge to reusable structures.
Bridging the gap between the semantic web and big data: answering SPARQL que...IJECEIAES
Nowadays, the database field has gotten much more diverse, and as a result, a variety of non-relational (NoSQL) databases have been created, including JSON-document databases and key-value stores, as well as extensible markup language (XML) and graph databases. Due to the emergence of a new generation of data services, some of the problems associated with big data have been resolved. In addition, in the haste to address the challenges of big data, NoSQL abandoned several core databases features that make them extremely efficient and functional, for instance the global view, which enables users to access data regardless of how it is logically structured or physically stored in its sources. In this article, we propose a method that allows us to query non-relational databases based on the ontology-based access data (OBDA) framework by delegating SPARQL protocol and resource description framework (RDF) query language (SPARQL) queries from ontology to the NoSQL database. We applied the method on a popular database called Couchbase and we discussed the result obtained.
The Future is Big Graphs: A Community View on Graph Processing SystemsNeo4j
Alexandru Iosup, Full Professor, Vrije Universiteit Amsterdam (VU Amsterdam)
Angela Bonifati, Full Professor of Computer Science, Université de Lyon
Hannes Voigt, Software Engineer, Neo4j
Data centric business and knowledge graph trendsAlan Morrison
The deck for my kickoff keynote at the Data-Centric Architecture Forum, February 3, 2020. Includes related data, content, and architecture definitions and fundamental explanations, knowledge graph trends, market outlook, transformation case studies and benefits of large-scale, cross-boundary integration/interoperation.
Knowledge graphs dedicated to the memory of amrapali zaveri 3388748Jyotindra Zaveri
Graphs Dedicated to the Memory of Late Dr Amrapali Zaveri (My daughter).
ANISA RULA, University of Milano-Bicocca, Italy and University of Bonn, Germany
AMRAPALI ZAVERI, Maastricht University, The Netherlands
ELENA SIMPERL, King’s College London, United Kingdom
ELENA DEMIDOVA, L3S Research Center, Leibniz Universität Hannover, Germany
This editorial summarizes the content of the Special Issue on Quality Assessment of Knowledge Graphs of
the Journal of Data and Information Quality (JDIQ). We dedicate this special issue to the memory of our
colleague and friend Amrapali Zaveri.
CCS Concepts: • Information systems → Data management systems;
Additional Key Words and Phrases: knowledge graphs, quality assessment, Linked Open Data
In this talk we will summarise some of the detectable trends on AI beyond deep learning. We will focus on the current transition from deep learning to deep semantics, describing the enabling infrastructures, challenges and opportunities in the construction of the next generation AI systems. The talk will focus on Natural Language Processing (NLP) as an AI sub-domain and will link to the research at the AI Systems Lab at the University of Manchester.
The Rensselaer Institute for Data Exploration and Applications is addressing new modes of data exploration and integration to enhance the work of campus researchers (and beyond). This talk outlines the "data exploration" technologies being explored
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...Ana Luísa Pinho
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
ESR spectroscopy in liquid food and beverages.pptxPRIYANKA PATEL
With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
Toxic effects of heavy metals : Lead and Arsenicsanjana502982
Heavy metals are naturally occuring metallic chemical elements that have relatively high density, and are toxic at even low concentrations. All toxic metals are termed as heavy metals irrespective of their atomic mass and density, eg. arsenic, lead, mercury, cadmium, thallium, chromium, etc.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skills
Salas, V. (2024) "John of St. Thomas (Poinsot) on the Science of Sacred Theol...Studia Poinsotiana
I Introduction
II Subalternation and Theology
III Theology and Dogmatic Declarations
IV The Mixed Principles of Theology
V Virtual Revelation: The Unity of Theology
VI Theology as a Natural Science
VII Theology’s Certitude
VIII Conclusion
Notes
Bibliography
All the contents are fully attributable to the author, Doctor Victor Salas. Should you wish to get this text republished, get in touch with the author or the editorial committee of the Studia Poinsotiana. Insofar as possible, we will be happy to broker your contact.
ANAMOLOUS SECONDARY GROWTH IN DICOT ROOTS.pptxRASHMI M G
Abnormal or anomalous secondary growth in plants. It defines secondary growth as an increase in plant girth due to vascular cambium or cork cambium. Anomalous secondary growth does not follow the normal pattern of a single vascular cambium producing xylem internally and phloem externally.
DERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...Wasswaderrick3
In this book, we use conservation of energy techniques on a fluid element to derive the Modified Bernoulli equation of flow with viscous or friction effects. We derive the general equation of flow/ velocity and then from this we derive the Pouiselle flow equation, the transition flow equation and the turbulent flow equation. In the situations where there are no viscous effects , the equation reduces to the Bernoulli equation. From experimental results, we are able to include other terms in the Bernoulli equation. We also look at cases where pressure gradients exist. We use the Modified Bernoulli equation to derive equations of flow rate for pipes of different cross sectional areas connected together. We also extend our techniques of energy conservation to a sphere falling in a viscous medium under the effect of gravity. We demonstrate Stokes equation of terminal velocity and turbulent flow equation. We look at a way of calculating the time taken for a body to fall in a viscous medium. We also look at the general equation of terminal velocity.
Phenomics assisted breeding in crop improvementIshaGoswami9
As the population is increasing and will reach about 9 billion upto 2050. Also due to climate change, it is difficult to meet the food requirement of such a large population. Facing the challenges presented by resource shortages, climate
change, and increasing global population, crop yield and quality need to be improved in a sustainable way over the coming decades. Genetic improvement by breeding is the best way to increase crop productivity. With the rapid progression of functional
genomics, an increasing number of crop genomes have been sequenced and dozens of genes influencing key agronomic traits have been identified. However, current genome sequence information has not been adequately exploited for understanding
the complex characteristics of multiple gene, owing to a lack of crop phenotypic data. Efficient, automatic, and accurate technologies and platforms that can capture phenotypic data that can
be linked to genomics information for crop improvement at all growth stages have become as important as genotyping. Thus,
high-throughput phenotyping has become the major bottleneck restricting crop breeding. Plant phenomics has been defined as the high-throughput, accurate acquisition and analysis of multi-dimensional phenotypes
during crop growing stages at the organism level, including the cell, tissue, organ, individual plant, plot, and field levels. With the rapid development of novel sensors, imaging technology,
and analysis methods, numerous infrastructure platforms have been developed for phenotyping.
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptxMAGOTI ERNEST
Although Artemia has been known to man for centuries, its use as a food for the culture of larval organisms apparently began only in the 1930s, when several investigators found that it made an excellent food for newly hatched fish larvae (Litvinenko et al., 2023). As aquaculture developed in the 1960s and ‘70s, the use of Artemia also became more widespread, due both to its convenience and to its nutritional value for larval organisms (Arenas-Pardo et al., 2024). The fact that Artemia dormant cysts can be stored for long periods in cans, and then used as an off-the-shelf food requiring only 24 h of incubation makes them the most convenient, least labor-intensive, live food available for aquaculture (Sorgeloos & Roubach, 2021). The nutritional value of Artemia, especially for marine organisms, is not constant, but varies both geographically and temporally. During the last decade, however, both the causes of Artemia nutritional variability and methods to improve poorquality Artemia have been identified (Loufi et al., 2024).
Brine shrimp (Artemia spp.) are used in marine aquaculture worldwide. Annually, more than 2,000 metric tons of dry cysts are used for cultivation of fish, crustacean, and shellfish larva. Brine shrimp are important to aquaculture because newly hatched brine shrimp nauplii (larvae) provide a food source for many fish fry (Mozanzadeh et al., 2021). Culture and harvesting of brine shrimp eggs represents another aspect of the aquaculture industry. Nauplii and metanauplii of Artemia, commonly known as brine shrimp, play a crucial role in aquaculture due to their nutritional value and suitability as live feed for many aquatic species, particularly in larval stages (Sorgeloos & Roubach, 2021).
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Employing Graph Databases as a Standardization Model towards Addressing Heterogeneity
1. Employing Graph Databases as a
Standardization Model towards
Addressing Heterogeneity
Dippy Aggarwal and Karen C. Davis
University of Cincinnati
Cincinnati, Ohio
IEEE 17th International Conference on
Information Reuse and Integration
July 28-30, 2016, Pittsburgh, USA
2. Agenda
Employing Graph Databases as a
Standardization Model towards
Addressing Heterogeneity
Motivation and Challenge
Our Proposed
Approach
Results and Future
Work
A Short Example Architecture Novelty
3. Integration of data from multiple sources lays foundation for building
rich and effective analytics systems.
Schema heterogeneity has been perceived as a major
challenge towards data integration and exchange for more
than two decades.
4. Proliferation in data models
Relational databases
de-facto standard for
decades
RDF databases
standard for linked data
NoSQL family of data models
“Map/Reduce is a great hammer but not everything is a nail” –
Benjamin Hindman (Co-Founder and Chief Architect at Mesosphere)
F. O¨ zcan, N. Tatbul, D. J. Abadi, M. Kornacker, C. Mohan, K. Ramasamy, and J. Wiener. Are we experiencing a big data bubble? In
Proceedings of the 2014 ACM SIGMOD International Conference on Management of Data, SIGMOD ’14, pages 1407–1408, New York, NY,
USA, 2014. ACM.
Our vision: It would be useful to have
an approach that allows leveraging both schema-based and
schemaless data stores.
+ NoSQL
5. Our research question
Given the the unique advantages possessed by
different classes of data stores, how can we bring
them together under a homogeneous
representation?
Image Credits: http://www.slideshare.net/jexp/intro-to-neo4j-presentation
7. Why graphs?
1. A simple and flexible abstraction for modeling artifacts of different kinds
Facebook Open Graph
Trends in databases
2. Attracting significant attention and interest in the past few years
8. Leveraging Neo4j for graph
implementation
Nodes and
relationships can
have properties
(key-value pairs)
Image Credits: Exploiting RDF Open Data Using NoSQL Graph Databases” – R. Bouhali and A. Laurent
9. Example of schema and data
model heterogeneity
Relational
schema excerpt
RDF excerpt
10. Addressing schema heterogeneity challenge
Relational schema excerpt
Neo4j
representation
Key-value
properties for
a node –
Jason Doe
11. Graph Representation for the
RDF Schema Excerpt
What is the additional merit that the common graph representation offers
compared to the knowledge that could have been derived from the native
model representations?
Name, homepage,
gender, birthday etc.
12. Advantage of graph model towards unification
By unifying them based on common attributes such as date of birth or
SkypeId each of the nodes can benefit by incorporating information from the
other schema.
Maps_With
13. “Exploiting RDF Open Data Using NoSQL Graph
Databases” – R. Bouhali and A. Laurent
R. Bouhali and A. Laurent. Artificial Intelligence Applications and Innovations: 11th IFIP WG 12.5 International Conference, AIAI 2015,
Bayonne, France,September 14-17, 2015, Proceedings, Exploiting RDF Open Data Using NoSQL Graph Databases, pages 177–190.
Springer International Publishing, Cham, 2015.
Data expressed in RDF RDF mapped to a property graph
Limitations: focus on converting only RDF data into a graph model whereas we envision
an extensible approach that embraces model diversity by allowing multiple models.
Novelty of our model: native model’s concept-preserving characteristic.
14. Architecture of our approach
Employs our
transformation
rules.
Export user defined
relational schemas in
a CSV format
15. Evaluation
Evaluation metrics (proposed by
Bouhali et al.)
Conciseness: The total number of nodes and
relationships and can be used to calculate the
graph size.
Connectivity: is calculated by dividing the
number of relationships with the total number of
nodes.
Sakila database in MySQL
Bouhali et al. – connectivity should be at least 1.5
Our results reflect a value (0.32) lower than the benchmark. Why
so? Sakila database: https://dev.mysql.com/doc/sakila/en/
16. Evaluation - trade-off between
conciseness and connectivity
Modeling
attributes
as nodes
Increased
conciseness
17. Evaluation metrics - trade-off between
conciseness and connectivity
Conclusions:
• The connectivity depends on the nature of original model
• A higher connectivity may come at the cost of an increase in the graph size.
Strong connectivity between nodes in a graph certainly is good for processing but
it also does not automatically lead to the conclusion that a lower number is not
desirable.
Increased
conciseness
18. Contributions
• An idea of employing graph databases as a means of
bridging the gap between schema-based and schemaless
data stores.
• A concept-preserving yet integrated graph model that
addresses the model heterogeneity and carries the
potential for handling the variety dimension of the big data
landscape.
• A proof-of-concept that illustrates the potential of
graph-based solutions towards addressing diversity in
data representations.
• A software-oriented, automated approach to transform
relational into a graph database.
19. The Path Forward
1. Extending our work by incorporating additional data
stores and illustrating integration.
2. Incorporate an evaluation study of the transformation
process to address the efficiency of the approach.
3. A performance study of querying an integrated graph
schema versus disconnected original native schemas is
another research direction.
4. The idea of reverse engineering the graph model to
obtain the schemas in the original models can also be
useful.
20. Selected References
• P. Atzeni, P. Cappellari, and P. A. Bernstein. Modelgen:Model
independent schema translation. In Data Engineering, 2005. ICDE
2005. Proceedings. 21st International Conference on, pages 1111–
1112. IEEE, 2005.
• R. Bouhali and A. Laurent. Artificial Intelligence Applications and
Innovations: 11th IFIP WG 12.5 International Conference, AIAI 2015,
Bayonne, France, September 14-17, 2015, Proceedings, chapter
Exploiting RDF Open Data Using NoSQL Graph Databases, pages
177–190. Springer International Publishing, Cham, 2015.
• S. Bowers and L. Delcambre. The uni-level description: A uniform
framework for representing information in multiple data models. In
Conceptual Modeling-ER 2003, pages 45–58. Springer, 2003.
21. References (Image Credits)
• Facebook Open Graph
http://www.nanigans.com/2012/02/03/10-facebook-open-graph-apps-actions/
• Data Integration (Slide 3)
http://www.dbta.com/BigDataQuarterly/Articles/The-New-Newly-Democratized-Data-
Integration-109144.aspx
• Trends in databases
https://www.linkedin.com/pulse/future-decentralized-data-processing-architecture-
raunak-jhawar
https://www.google.com/trends/