Datacamp @ Bar Camp Bratislava

•Télécharger en tant que KEY, PDF•

0 j'aime•474 vues

Knowerce

Datacamp - data sharing web aplication with data received through free information act in Slovakia

Technologie Voyages

knowerce|co

Datacamp
Fair-Play Data

Stefan Urbanek November 2009
stefan@knowerce.sk

knowerce|co

government register of
web site organisations

data sitting in isolated data silos
3

knowerce|co

huh?

we do not have data on web as data
4

knowerce|co

+

manage data
with the quality process of an enterprise

8

knowerce|co

For Visitors

data catalogue searching sharing

9

knowerce|co

For Owners

data descriptions importing quality management

10

knowerce|co

For Remixers

application
programming interface

11

knowerce|co

Fair-play Data*

*open, social, shareable and with quality assurance
12

Searching

■ Google-style keywords: michal kovac
■ exclusion with minus sign: michal -kovac
■ wildcards: michal kovac*
■ reﬁnements:
■ ﬁeld:name ﬁeld:city
■ dataset:eurodonations
■ category:donations

20

knowerce|co

Under the Hood*

*slightly technical

ﬁles with data

web

staging ETL datasets application
extraction
transformation
loading

22

company register extraction

public procurement extraction

...

extraction staging loading datasets
web manager

temporary or downloaded ﬁles

23

knowerce|co

Application
Programming Interface

<?xml version="1.0" encoding="UTF-8"?>
<dataset-description>
<category-id type="integer">1</category-id>
<collection-mode></collection-mode>
<created-at type="datetime">2009-09-13T09:59:51Z</created-at>
<data-provider></data-provider>
<data-source-type></data-source-type>
<database nil="true"></database>
<format-rule-id type="integer" nil="true"></format-rule-id>
<granularity></granularity>
<id type="integer">5</id>
<identifier>ds_eurodonations</identifier>

data description
27

knowerce|co

“raw data now!”

Tim Berners-Lee @ TED

knowerce|co

Copyrights and Credits
■ Silos by Noodle Snacks: http://commons.wikimedia.org/wiki/File:Maria_Cement_Silos.jpg, CC Attribution, Share Alike 3.0 Unported
■ Icons by Oxygen Team: http://www.iconﬁnder.net/search/1/?q=iconset:oxygen, GPL
■ Icons by Alessandro Rei, KDE, GPL
■ Angel Wings by *Spyrogs, Deviant Art: http://spirogs.deviantart.com/art/Angel-Wings-Tatoo-87089782
■ Coins by Mnemo, Wikimedia Commons, http://commons.wikimedia.org/wiki/File:Swedish_coins_20050924.jpg, CC Attribution, Share Alike 3.0
■ Folder icon: Benji Garner, Icon set: Rise, Free for commercial use
■ Application icon by Sergio Sanchez Lopez, GPL
■ Network icon by Everaldo Coelho, Icon set: Crystal Clear, LGPL

33

Contenu connexe

Similaire à Datacamp @ Bar Camp Bratislava

Infochimps + CloudCon: Infinite Monkey Theorem

Infochimps, a CSC Big Data Business

From open data to API-driven business

OpenDataSoft

Tech4Africa - Opportunities around Big Data

Steve Watt

Steve Watt Presentation

Big Data Houston

From a hack to Data Mesh (Devoxx 2022)

Simon Maurin

https://bit.ly/2Aa0I9P Im Zeitalter von Big Data, künstlicher Intelligenz und Cloud Computing nimmt die Menge und Heterogenität der Daten rasant zu. Unternehmen brauchen klare Strategien, um ihre digitalen Informationen effektiv zu nutzen und die datenbasierte Wertschöpfung voranzutreiben. In diesem Webinar stellen wir Ihnen zukunftsweisende Technologietrends vor, die die Datenstrategien von Unternehmen global prägen: - Wie richten große Organisationen ihre Architekturen zur konformen Daten-Bereitstellung strategisch aus? Welche Rolle spielt hierbei das Konzept der „Data Fabric“? - Wie lässt sich eine konsistente Daten-Integration in Echtzeit innerhalb einer heterogenen Landschaft aus on-prem und diversen Clouds sicherstellen? - Wie können Unternehmen eine Self-Service Infrastruktur aufbauen, um ihre Datenbestände zugänglich zu machen und zu monetarisieren? - Welche Rolle kann sprachgesteuerte AI in der Zukunft der Datenanalyse spielen?

Datenstrategie der Zukunft - Technologietrends, die Sie kennen müssen

Denodo

Watch here: https://bit.ly/3i2iJbu You will often hear that "data is the new gold". In this context, data management is one of the areas that has received more attention by the software community in recent years. From Artificial Intelligence and Machine Learning to new ways to store and process data, the landscape for data management is in constant evolution. From the privileged perspective of an enterprise middleware platform, we at Denodo have the advantage of seeing many of these changes happen. Join us for an exciting session that will cover: - The most interesting trends in data management. - Our predictions on how those trends will change the data management world. - How these trends are shaping the future of data virtualization and our own software.

What is the future of data strategy?

Denodo

"Bonnier News is the largest news organisation in Sweden, publishing Dagens Nyheter and Expressen, two of the country’s largest newspapers. When we needed to build a new data processing platform that could accommodate the needs of many different, competing brands, we turned to Openshift and Kubernetes. In this presentation, we will describe the architectural tradeoffs and choices we made, and how we have been able to deploy data flows at a high rate by focusing on technical simplicity." Lars Albertsson is an independent consultant for Bonnier News as well as Spotify, several startups and banks. He will talk together with Eric Skoglund, the product owner of Bonnier News’s data platform project.

DevOpsDaysRiga 2018: Eric Skoglund, Lars Albertsson - Kubernetes as data plat...

DevOpsDays Riga

Bonnier News is the largest news organisation in Sweden, publishing Dagens Nyheter and Expressen, two of the country’s largest newspapers. When we needed to build a new data processing platform that could accommodate the needs of many different, competing brands, we turned to Openshift and Kubernetes. In this presentation, we will describe the architectural tradeoffs and choices we made, and how we have been able to deploy data flows at a high rate by focusing on technical simplicity.

Kubernetes as data platform

Lars Albertsson

Achieving agility in data and analytics is hard. It’s no secret that most data organizations struggle to deliver the on-demand data products that their business customers demand. Recently, there has been much hype around new design patterns that promise to deliver this much sought-after agility. In this webinar, Chris Bergh, CEO and Head Chef of DataKitchen will cut through the noise and describe several elegant and effective data architecture design patterns that deliver low errors, rapid development, and high levels of collaboration. He’ll cover: • DataOps, Data Mesh, Functional Design, and Hub & Spoke design patterns; • Where Data Fabric fits into your architecture; • How different patterns can work together to maximize agility; and • How a DataOps platform serves as the foundational superstructure for your agile architecture.

DataOps - The Foundation for Your Agile Data Architecture

DATAVERSITY

Data Science at Scale - The DevOps Approach

Mihai Criveti

DevOps for Data Engineers - Automate Your Data Science Pipeline with Ansible,...

Mihai Criveti

[Europe merge world tour] Perforce Europe Merge World Tour Keynote

Perforce

Neo4j Graph Summit 2024 Workshop - EMEA - Breda_and_Munchen.pdf

Neo4j

Un approccio completo di tipo cognitivo comprende tre componenti: un metodo, un ecosistema e una piattaforma. In questa sessione scopriremo come realizzare questo approccio grazie anche a Watson Data Platform, che aiuta i data scientist e gli esperti di business analytics a far “lavorare i dati” in un’ottica cognitive. In questo modo si può dare impulso alla crescita e al cambiamento aziendale. Ci concentreremo sulla possibilità di analizzare i dati provenienti dai Social Media per valutare la percezione dell’Amministrazione da parte di studenti, genitori, stampa, blogger… Al cuore della soluzione ci sono una serie di servizi disegnati per funzione aziendale (sviluppatori, data scientist, data engineers, comunicazione / marketing) e la capacità di imparare propria della tecnologia cognitiva, che completano l’architettura e aiutano a “comporre” nuove soluzioni di business.

Libera la potenza del Machine Learning

Jürgen Ambrosi

Showcase Your Data w/ RedMonk Analytics

sogrady

Watch full webinar here: https://bit.ly/2EpHGyd Presented at Data Champions, Online Asia 2020 Businesses and individuals around the world are experiencing the impact of a global pandemic. With many workers and potential shoppers still sequestered, COVID-19 is proving to have a momentous impact on the global economy. Regardless of the current situation and post-pandemic era, real-time data becomes even more critical to healthcare practitioners, business owners, government officials, and the public at large where holistic and timely information are important to make quick decisions. It enables doctors to make quick decisions about where to focus the care, business owners to alter production schedules to meet the demand, government agencies to contain the epidemic, and the public to be informed about prevention. In this on-demand session, you will learn about the capabilities of data virtualization as a modern data integration technique and how can organisations: - Rapidly unify information from disparate data sources to make accurate decisions and analyse data in real-time - Build a single engine for security that provides audit and control by geographies - Accelerate delivery of insights from your advanced analytics project

A Key to Real-time Insights in a Post-COVID World (ASEAN)

Denodo

Brief introduction to Cerved data, the role of data scientist in Cerved and how a data scientist can take advantage from graph database. Bio: Stefano Gatti: Born in 1970, has been involved for more than 15 years in several big data and technologies driven projects in leading business information companies like Lince and Cerved. He is very fond of agile metodologies, trying to apply them at all organizational levels. In last years he is strongly engaged in facilitating in Cerved the spread of innovation and the taking advantage from the new big and smart data technologies especially from a business usage perspective. datatelling, open innovation, partnership with smart actors of worldwide data driven innovation ecosystem are his actual mantra. Nunzio Pellegrino: Data Scientist in Cerved, as part of Innovation team, with focus on extract value from data and resolve problems with the latest technologies available. I’ve a degree in Statistics with background in Machine Learning. I’ve being worked primarily in Data Integration and Business Intelligence projects for 3 years. In this moment, I’m product owner of a web application based on GraphDB and involved in Italian Open Data projects. I’m a R enthusiastic, Python practitioner and fascinated of graph ecosystem.

A view of graph data usage by Cerved

Data Science Milan

Public private-cloud

Jamie Taylor

Open Data Open Innovation and The Cloud gayler berlin nov12

Mark Gayler

Similaire à Datacamp @ Bar Camp Bratislava (20)

Infochimps + CloudCon: Infinite Monkey Theorem

From open data to API-driven business

Tech4Africa - Opportunities around Big Data

Steve Watt Presentation

From a hack to Data Mesh (Devoxx 2022)

Datenstrategie der Zukunft - Technologietrends, die Sie kennen müssen

What is the future of data strategy?

DevOpsDaysRiga 2018: Eric Skoglund, Lars Albertsson - Kubernetes as data plat...

Kubernetes as data platform

DataOps - The Foundation for Your Agile Data Architecture

Data Science at Scale - The DevOps Approach

DevOps for Data Engineers - Automate Your Data Science Pipeline with Ansible,...

[Europe merge world tour] Perforce Europe Merge World Tour Keynote

Neo4j Graph Summit 2024 Workshop - EMEA - Breda_and_Munchen.pdf

Libera la potenza del Machine Learning

Showcase Your Data w/ RedMonk Analytics

A Key to Real-time Insights in a Post-COVID World (ASEAN)

A view of graph data usage by Cerved

Public private-cloud

Open Data Open Innovation and The Cloud gayler berlin nov12

Dernier

Scaling API-first – The story of a global engineering organization

Radu Cotescu

💉💊+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHABI}}+971581248768 +971581248768 Mtp-Kit (500MG) Prices » Dubai [(+971581248768**)] Abortion Pills For Sale In Dubai, UAE, Mifepristone and Misoprostol Tablets Available In Dubai, UAE CONTACT DR.Maya Whatsapp +971581248768 We Have Abortion Pills / Cytotec Tablets /Mifegest Kit Available in Dubai, Sharjah, Abudhabi, Ajman, Alain, Fujairah, Ras Al Khaimah, Umm Al Quwain, UAE, Buy cytotec in Dubai +971581248768''''Abortion Pills near me DUBAI | ABU DHABI|UAE. Price of Misoprostol, Cytotec” +971581248768' Dr.DEEM ''BUY ABORTION PILLS MIFEGEST KIT, MISOPROTONE, CYTOTEC PILLS IN DUBAI, ABU DHABI,UAE'' Contact me now via What's App…… abortion Pills Cytotec also available Oman Qatar Doha Saudi Arabia Bahrain Above all, Cytotec Abortion Pills are Available In Dubai / UAE, you will be very happy to do abortion in Dubai we are providing cytotec 200mg abortion pill in Dubai, UAE. Medication abortion offers an alternative to Surgical Abortion for women in the early weeks of pregnancy. We only offer abortion pills from 1 week-6 Months. We then advise you to use surgery if its beyond 6 months. Our Abu Dhabi, Ajman, Al Ain, Dubai, Fujairah, Ras Al Khaimah (RAK), Sharjah, Umm Al Quwain (UAQ) United Arab Emirates Abortion Clinic provides the safest and most advanced techniques for providing non-surgical, medical and surgical abortion methods for early through late second trimester, including the Abortion By Pill Procedure (RU 486, Mifeprex, Mifepristone, early options French Abortion Pill), Tamoxifen, Methotrexate and Cytotec (Misoprostol). The Abu Dhabi, United Arab Emirates Abortion Clinic performs Same Day Abortion Procedure using medications that are taken on the first day of the office visit and will cause the abortion to occur generally within 4 to 6 hours (as early as 30 minutes) for patients who are 3 to 12 weeks pregnant. When Mifepristone and Misoprostol are used, 50% of patients complete in 4 to 6 hours; 75% to 80% in 12 hours; and 90% in 24 hours. We use a regimen that allows for completion without the need for surgery 99% of the time. All advanced second trimester and late term pregnancies at our Tampa clinic (17 to 24 weeks or greater) can be completed within 24 hours or less 99% of the time without the need surgery. The procedure is completed with minimal to no complications. Our Women's Health Center located in Abu Dhabi, United Arab Emirates, uses the latest medications for medical abortions (RU-486, Mifeprex, Mifegyne, Mifepristone, early options French abortion pill), Methotrexate and Cytotec (Misoprostol). The safety standards of our Abu Dhabi, United Arab Emirates Abortion Doctors remain unparalleled. They consistently maintain the lowest complication rates throughout the nation. Our Physicians and staff are always available to answer questions and care for women in one of the most difficult times in their lives. The decision to have an abortion at the Abortion Cl

+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...

?#DUbAI#??##{{(☎️+971_581248768%)**%*]'#abortion pills for sale in dubai@

The Good, the Bad and the Governed - Why is governance a dirty word? David O'Neill, Chief Operating Officer - APIContext Apidays New York 2024: The API Economy in the AI Era (April 30 & May 1, 2024) ------ Check out our conferences at https://www.apidays.global/ Do you want to sponsor or talk at one of our conferences? https://apidays.typeform.com/to/ILJeAaV8 Learn more on APIscene, the global media made by the community for the community: https://www.apiscene.io Explore the API ecosystem with the API Landscape: https://apilandscape.apiscene.io/

Apidays New York 2024 - The Good, the Bad and the Governed by David O'Neill, ...

apidays

Increase engagement and revenue with Muvi Live Paywall! In this presentation, we will explore the five key benefits of using Muvi Live Paywall to monetize your live streams. You'll learn how Muvi Live Paywall can help you: Monetize your live content easily: Set up pay-per-view access to your live streams and start generating revenue from your content. Increase audience engagement: Provide exclusive, premium content behind the paywall to keep your viewers engaged. Gain valuable viewer insights: Track viewer data and analytics to better understand your audience and tailor your content accordingly. Reduce content piracy: Muvi Live Paywall's security features help protect your content from unauthorized distribution. Streamline your workflow: The all-in-one platform simplifies the process of managing and monetizing your live streams. With Muvi Live Paywall, you can take control of your live stream monetization and create a sustainable business model for your content. Learn more about Muvi Live Paywall and start generating revenue from your live streams today!

Top 5 Benefits OF Using Muvi Live Paywall For Live Streams

Roshan Dwivedi

Bajaj Allianz Life Insurance Company - Insurer Innovation Award 2024

The Digital Insurer

Created by Mozilla Research in 2012 and now part of Linux Foundation Europe, the Servo project is an experimental rendering engine written in Rust. It combines memory safety and concurrency to create an independent, modular, and embeddable rendering engine that adheres to web standards. Stewardship of Servo moved from Mozilla Research to the Linux Foundation in 2020, where its mission remains unchanged. After some slow years, in 2023 there has been renewed activity on the project, with a roadmap now focused on improving the engine’s CSS 2 conformance, exploring Android support, and making Servo a practical embeddable rendering engine. In this presentation, Rakhi Sharma reviews the status of the project, our recent developments in 2023, our collaboration with Tauri to make Servo an easy-to-use embeddable rendering engine, and our plans for the future to make Servo an alternative web rendering engine for the embedded devices industry. (c) Embedded Open Source Summit 2024 April 16-18, 2024 Seattle, Washington (US) https://events.linuxfoundation.org/embedded-open-source-summit/ https://ossna2024.sched.com/event/1aBNF/a-year-of-servo-reboot-where-are-we-now-rakhi-sharma-igalia

A Year of the Servo Reboot: Where Are We Now?

Igalia

presentation ICT roal in 21st century education

jfdjdjcjdnsjd

GenAI Risks & Security Meetup 01052024.pdf

lior mazor

Abhishek Deb(1), Mr Abdul Kalam(2) M. Des (UX) , School of Design, DIT University , Dehradun. This paper explores the future potential of AI-enabled smartphone processors, aiming to investigate the advancements, capabilities, and implications of integrating artificial intelligence (AI) into smartphone technology. The research study goals consist of evaluating the development of AI in mobile phone processors, analyzing the existing state as well as abilities of AI-enabled cpus determining future patterns as well as chances together with reviewing obstacles as well as factors to consider for more growth.

Exploring the Future Potential of AI-Enabled Smartphone Processors

debabhi2

Imagine a world where information flows as swiftly as thought itself, making decision-making as fluid as the data driving it. Every moment is critical, and the right tools can significantly boost your organization’s performance. The power of real-time data automation through FME can turn this vision into reality. Aimed at professionals eager to leverage real-time data for enhanced decision-making and efficiency, this webinar will cover the essentials of real-time data and its significance. We’ll explore: FME’s role in real-time event processing, from data intake and analysis to transformation and reporting An overview of leveraging streams vs. automations FME’s impact across various industries highlighted by real-life case studies Live demonstrations on setting up FME workflows for real-time data Practical advice on getting started, best practices, and tips for effective implementation Join us to enhance your skills in real-time data automation with FME, and take your operational capabilities to the next level.

From Event to Action: Accelerate Your Decision Making with Real-Time Automation

Safe Software

Axa Assurance Maroc - Insurer Innovation Award 2024

The Digital Insurer

🐬 The future of MySQL is Postgres 🐘

RTylerCroy

How to Troubleshoot Apps for the Modern Connected Worker

ThousandEyes

Repurposing LNG terminals for Hydrogen Ammonia: Feasibility and Cost Saving

Edi Saputra

Automating Google Workspace (GWS) & more with Apps Script

wesley chun

Polkadot JAM Slides - Token2049 - By Dr. Gavin Wood

Juan lago vázquez

This presentations targets students or working professionals. You may know Google for search, YouTube, Android, Chrome, and Gmail, but did you know Google has many developer tools, platforms & APIs? This comprehensive yet still high-level overview outlines the most impactful tools for where to run your code, store & analyze your data. It will also inspire you as to what's possible. This talk is 50 minutes in length.

Powerful Google developer tools for immediate impact! (2023-24 C)

wesley chun

The 7 Things I Know About Cyber Security After 25 Years | April 2024

Rafal Los

Boost Fertility New Invention Ups Success Rates.pdf

sudhanshuwaghmare1

Workshop - Best of Both Worlds_ Combine KG and Vector search for enhanced R...

Neo4j

Dernier (20)

Scaling API-first – The story of a global engineering organization

+971581248768>> SAFE AND ORIGINAL ABORTION PILLS FOR SALE IN DUBAI AND ABUDHA...

Apidays New York 2024 - The Good, the Bad and the Governed by David O'Neill, ...

Top 5 Benefits OF Using Muvi Live Paywall For Live Streams

Bajaj Allianz Life Insurance Company - Insurer Innovation Award 2024

A Year of the Servo Reboot: Where Are We Now?

presentation ICT roal in 21st century education

GenAI Risks & Security Meetup 01052024.pdf

Exploring the Future Potential of AI-Enabled Smartphone Processors

From Event to Action: Accelerate Your Decision Making with Real-Time Automation

Axa Assurance Maroc - Insurer Innovation Award 2024

🐬 The future of MySQL is Postgres 🐘

How to Troubleshoot Apps for the Modern Connected Worker

Repurposing LNG terminals for Hydrogen Ammonia: Feasibility and Cost Saving

Automating Google Workspace (GWS) & more with Apps Script

Polkadot JAM Slides - Token2049 - By Dr. Gavin Wood

Powerful Google developer tools for immediate impact! (2023-24 C)

The 7 Things I Know About Cyber Security After 25 Years | April 2024

Boost Fertility New Invention Ups Success Rates.pdf

Workshop - Best of Both Worlds_ Combine KG and Vector search for enhanced R...

Datacamp @ Bar Camp Bratislava

1. knowerce|co Datacamp Fair-Play Data Stefan Urbanek November 2009 stefan@knowerce.sk

2. knowerce|co Web and Data

3. knowerce|co government register of web site organisations data sitting in isolated data silos 3

4. knowerce|co huh? we do not have data on web as data 4

5. knowerce|co ≠ document data 5

6. knowerce|co The Datacamp

7. knowerce|co = + 7

8. knowerce|co + manage data with the quality process of an enterprise 8

9. knowerce|co For Visitors data catalogue searching sharing 9

10. knowerce|co For Owners data descriptions importing quality management 10

11. knowerce|co For Remixers application programming interface 11

12. knowerce|co Fair-play Data* *open, social, shareable and with quality assurance 12

13. knowerce|co The Application

14. 14

15. 15

16. 16

17. 17

18. Quality Conﬂicts browsing editing 18

19. 19

20. Searching ■ Google-style keywords: michal kovac ■ exclusion with minus sign: michal -kovac ■ wildcards: michal kovac* ■ refinements: ■ field:name field:city ■ dataset:eurodonations ■ category:donations 20

21. knowerce|co Under the Hood* *slightly technical

22. ﬁles with data web staging ETL datasets application extraction transformation loading 22

23. company register extraction public procurement extraction ... extraction staging loading datasets web manager temporary or downloaded ﬁles 23

24. knowerce|co Application Programming Interface

25. 25

26. ugly <html> neat CSV 26

27. <?xml version="1.0" encoding="UTF-8"?> <dataset-description> <category-id type="integer">1</category-id> <collection-mode></collection-mode> <created-at type="datetime">2009-09-13T09:59:51Z</created-at> <data-provider></data-provider> <data-source-type></data-source-type> <database nil="true"></database> <format-rule-id type="integer" nil="true"></format-rule-id> <granularity></granularity> <id type="integer">5</id> <identifier>ds_eurodonations</identifier> data description 27

28. API 28

29. knowerce|co open and reusable data 29

30. knowerce|co new applications 30

31. knowerce|co “raw data now!” Tim Berners-Lee @ TED

32. knowerce|co Thank you

33. knowerce|co Copyrights and Credits ■ Silos by Noodle Snacks: http://commons.wikimedia.org/wiki/File:Maria_Cement_Silos.jpg, CC Attribution, Share Alike 3.0 Unported ■ Icons by Oxygen Team: http://www.iconﬁnder.net/search/1/?q=iconset:oxygen, GPL ■ Icons by Alessandro Rei, KDE, GPL ■ Angel Wings by *Spyrogs, Deviant Art: http://spirogs.deviantart.com/art/Angel-Wings-Tatoo-87089782 ■ Coins by Mnemo, Wikimedia Commons, http://commons.wikimedia.org/wiki/File:Swedish_coins_20050924.jpg, CC Attribution, Share Alike 3.0 ■ Folder icon: Benji Garner, Icon set: Rise, Free for commercial use ■ Application icon by Sergio Sanchez Lopez, GPL ■ Network icon by Everaldo Coelho, Icon set: Crystal Clear, LGPL 33

Datacamp @ Bar Camp Bratislava

Recommandé

Recommandé

Contenu connexe

Similaire à Datacamp @ Bar Camp Bratislava

Similaire à Datacamp @ Bar Camp Bratislava (20)

Dernier

Dernier (20)

Datacamp @ Bar Camp Bratislava