Spring WG Meeting 2015

11-12 May 2015, Kosice (SK)


1.  Goal and Program

The goal of the meeting includes two main issues:

  • [RESEARCH] Definition of open challenges in keyword search over structured databases, with particular reference to the querying process in BIG DATA (by means of keynote talks and round table discussions)
  • [NETWORKING] Identification of research topics studied by research groups involved in KEYSTONE, promoting joint research activity



Day 1 Day 2
 Coffee Break 10.20-10.50 Coffee Break
 SESSION I 11.00-13.00
 12.45-14.00  Lunch 12.45-14.00 Lunch

15.50-16.10 Coffee Break 15.30-15.50 Coffee Break
 SESSION III 15.50-17.30
18.30-21.00 Dinner  17.30-17.40  Conclusions


Presentation of the participants / tag cloud about peoples’ research/selection of the chairs for the afternoon session 

Keynote I:
Peter Bednar, Technical University of Kosice, SK: Urban Sensing platform – an example of the lambda architecture for social web Big data analysis



Keynote II:
Javier D. Fernandez, Vienna University of Economics and Business, AT: Scalable RDF Management in the Web of Data:  Current Trends and Challenges

14.45 Presentation of the white paper on Keyword search in Big Data  where the answer provided by the KEYSTONE Members in the first meeting to the following questions are analyzed. [Raquel Trillo Lado]

• Challenges: What are the main three challenges in keyword-based search  for structured data sources and data analytics?
• Scenario/Use Case: Which practical scenarios do you think can benefit  from keyword-search research on Big Data?
• Methods (I): How a user can be supported in the formulation of keyword queries/analysis of the obtained results?
• Methods (II): What should the result be to a keyword query in Big Data?
• Benchmarking/Evaluation: What kind of benchmarking environments (which  include scalability, accuracy and feasibility) can be devised for Big  Data analysis?
• Application Fields: How can the results of KEYSTONE be used to add  value to open data and foster the creation of data intensive companies?

15.00 Keyword search in Big Data: one year after 

Discussion in two groups and 2 sessions. The idea is to provide an  update to the white paper.
[The chairs of the groups are appointed during the meeting]

1st session

1st group
Challenges-  Scenario/Use Case- Application Fields

2nd group
Methods (I)- Methods (II)-  Benchmarking/Evaluation

Keyword search in Big Data: one year after: 2nd session

17.00 The 1st KEYSTONE Open Conference: presentation + challenge session
(Alexandre, Yannis, Sanda, Marko)
Invite a colleague to submit to our conference [Yannis]
Interactive session for matching research interests [Sanda, Marko]
17.45 Conclusion of the 1st day

Social Dinner no May 11 at Mala Praha Restaurant


9.00 Results of the interactive sessions
[Sanda + chairs of the session Keyword search in Big Data: one year after]

9.30 Nicola Ferro, University of Padua (IT):  How (not) to evaluate keyword search systems

The talk will propose an holistic approach to evaluation of keyword-based search systems and discuss some limitations of the current benchmarks. It will then frame the proposed approach in the context of the CLEF large-scale evaluation campaign and suggests concrete steps for preparing a proposal for a shared evaluation task in 2016.


Krisztian Balog, University of Stavanger (NO): Evaluation Initiatives for Entity-Oriented Search

In this talk Krisztian Balog will provide an overview of intiatives aimed at evaluating entity-oriented search from an information retrieval perspective.
Specifically, Krisztian Balog will discuss three tasks: (1) entity retrieval, (2) knowledge base acceleration, and (3) query understanding. Along the way, he will identify shared building blocks and highlight some open challenges. Finally, he will present recent efforts towards making evaluation more realistic in a “living labs” setting.

11.45 Interactive sessions with the aim of

  • WG3: finding the active research areas in WG3 field [chair: Omar Boucelma]
  • WG4: representing and collecting datasets for keyword search [chair: Paulo Rupino]



Informal discussion about KEYSTONE [chairs: John Breslin /  Francesco Guerra]
Issues to be discussed:

  • Goals to be achieved during the project
  • How to improve the participation in the KEYSTONE activities
  • Activities to be done
  • Disseminating / promoting our research
  • What I can do through KEYSTONE


SESSION VII  “That’s interesting!”
Some participants shortly present their research.

Registration: before the meeting (send an email to francesco.guerra@unimore.it) and during  the meeting. Participants are encouraged to bring a poster.

[Javier Lacasta Miguel – Raquel Amaro]


Social dinner May 12 at 19.00 
Karzcma Mlyn 





Where to eat in Kosice

3.  Venue

The WG Meeting will be held at the Technical university, in University Library, ideally located in the center of the university campus. The Technical University Library is a specialised library which, corresponding to the TUKE orientation, offers a wide range of information services for staff, students and the public. The library mission is to cover the basic information needs of the university students and staff thruogh ordering and processing of literature for the reading room and home-study. Technical University Library is involved in the Kolin project /Košice Library Information Network/ that will allow for two university- and one research library to form a unique Library information network in Eastern Slovakia, the largest On-line library consortium in the country.

University library TUKE
Boženy Němcovej 7 (BN7)
042 00 Košice
GPS:N48,7314°, E21,2440°
University library address


University library

University library

Campus of the Technical university of Košice

Plan of the University Campus

Košice map


4. Travel Information

Košice is situated right at the heart of the region of East Slovakia. Košice has its own international airport, rail connections direct from all Central European capitals (Bratislava, Prague, Budapest, Vienna), and it is connected up to the main European road and motorway networks.

By airplane

There are regular flight connections with the Slovak capital city Bratislava and international air connections with the Prague, Vienna and London. For more information about all flights schedule, visit www.airportkosice.sk

The international airport in Košice is just 6 kilometres south of the city centre. The airport is connected to the city centre and the main train and bus stations by public bus number 23 every hour. The bus journey to the city centre takes around 15 minutes and you can check the timetable here: http://imhd.zoznam.sk/ke/cestovny-poriadok/linka/23.html. You can buy tickets in a ticket machine placed in front of the airport building (0, 60€) or directly from the driver (1€ ).

You can also use a taxi service to get to the centre. The price of the taxi service to the dowtown starts at 10 €.

You can also fly to Budapest Airport and continue to Kosice by train.  Ticket for shuttle bus can be bought also separately from CassoviaExpress and AirTrans.

The Krakow Balice airport also provides many cheap Europe connections, but the traveling to Kosice is less comfortable (crossing High Tatra mountains). Shuttle bus from AirTrans costs more than 100€.

By train

Train connections from Vienna, Bratislava and Prague will take you right to Košice city centre. The comfortable journey by EC/IC train from Prague takes 8 hours, while from Bratislava it is just under 5 hours. If you travel at night, you can use the couchette or sleeping cars.

Košice is also linked by rail to Budapest, with two direct EC/IC train connections – morning and afternoon, with the journey taking around 3.5 hours.

For more information, visit www.slovakrail.sk or www.cp.sk.

By bus

There are also direct bus links from Košice to numerous European capitals, i.e. Paris, Rotterdam, Brussels, London, Frankfurt, Berlin, Munich, Zurich, Geneva, Rome, Florence, Venice, Prague and Vienna. There are several connections daily between Bratislava and Košice.

For more information, visit www.eurobus.sk, www.studentagency.eu or www.cp.sk.


5. Accomodation

Košice has plenty to offer – accommodation in stylish and designer hotels, boutique hotels, business and apartment hotels directly in the city or boarding houses at good prices. More information on http:www.visitkosice.eu/en/accommodation or http://www.booking.com.

Below you can find some recommended hotels and pensions.


Hotel Hilton

Doubletree By Hilton Košice☆☆☆☆

Hlavná 1, 040 01 Košice

doubletree.hilton.co.uk/kosice – centrally located on Hlavná ulica in the midst of Košice’s historic city center, near tram stop number 7, near train station (all buses and trams direction Námestie osloboditeľov – second stop).


Hotel Jasmin

Hotel Yasmin Košice☆☆☆☆

Tyršovo nábrežie 1, 040 01 Košice

www.hotel-yasmin.sk – very stylish hotel, 10 minutes walking from university, (from Station Square: buses direction Mlynská bašta – third stop).


Hotel Ambassador

Hotel Ambassador☆☆☆☆

Hlavná 101, 040 01 Košice

http://www.ambassador.sk – is located in the historical centre of Kosice, in the heart of the town.


Hotel Bristol

Hotel Bristol ☆☆☆☆

Orlia 3, 040 01 Košice

www.hotelbristol.sk – The Boutique Hotel Bristol Kosice is well positioned in the centre of the town.


Hotel Zlaty dukat

Hotel Zlatý dukát ☆☆☆☆

Hlavná 16, Košice

www.zlatydukat.sk – hotel located on the main street of the town.


Hotel Maraton

Hotel Maratón☆☆☆☆

Strojárenská 11A , 040 01 Košice

http://www.hotelmaraton.sk – small hotel near university, 10 minutes walking, or 2 tram stops (tram #7) from TUKE, (from Station Square: buses and trams direction Radnica Starého mesta).


Boutique Hotel Chrysso

Boutique Hotel Chrysso☆☆☆☆

Zvonárska 3 , 040 01 Košice

http://www.chrysso.sk – elegant small hotel located near the main street.


Pension Horse Inn

Pension Horse Inn☆☆☆

Zvonárska 17, 040 01 Košice

http://www.horseinn.sk – is situated in the historical heart of Košice, on Zvonárska Street.


Hotel Gloria palac

Hotel Gloria Palac☆☆☆

Bottova, 040 01 Košice

http://www.gloriapalac.sk – cheaper hotel near tram stop 7, near city centre, near train station (next to Hilton Hotel).


Hotel Baranok

Pension Baránok☆☆☆

Čermeľská cesta 67, 040 01 Kosice

http://www.baranok.sk – accommodation at a good price with a family type atmosphere, but have a bad bus connection – suitable for car parking and when using Taxi.


Hotel Rokoko

Hotel Rokoko☆☆☆

Gorkého 1773/9, 040 01 Kosice

www.rokoko.sk – Nice, cheap and stylish small hotel. 10 minutes walking distance from university, (from Station Square: buses direction Mlynská bašta – fourth stop).


Pension Grand

Pension Grand☆☆☆

Kováčska 65, 040 01 Košice

http://www.penziongrand.eu -is situated in the historical centre of Košice, in the immediate vicinity of the pedestrian zone.



6. How to claim a reimbursement (only for invited people):

  1. You have to be registered in the eCost system
  2. Summary of eligible expenses
  3. IMPORTANT Note about how to avoid Italian tax deductions