Okt. Bayern-Star als Bachelor: Robert Lewandowski ist jetzt Uni-Absolvent. Für sein Studium hat er zehn Jahre gebraucht. Aber in der Zeit hat er. Okt. Einen Tag nach der erfolgreichen WM-Qualifikation Polens beendete Lewandowski sein Studium an der Sporthochschule in Warschau. Robert Lewandowski (* August in Warschau) ist ein polnischer Fußballspieler. . Im Oktober beendete Lewandowski den Bachelor- Studiengang Sport an der Sporthochschule Warschau mit Auszeichnung. Das Thema seiner.
Auch im Jahr ist die Suchmaschinenlandschaft durch einen stetigen Wandel gekennzeichnet. The retrieval effectiveness of search engines on navigational queries more.
Purpose — To test major Web search engines on their performance on navigational queries, i. Users described the desired pages, and the results position of these is recorded.
Measured success N and mean reciprocal rank are calculated. Findings — Performance of the major search engines Google, Yahoo, and MSN is best, with around 90 percent of queries answered correctly.
Ask and Exalead perform worse but receive good scores as well. Therefore, the results are only valid for German queries. Practical implications — When designing a search engine to compete with the major search engines, care should be taken on the performance on navigational queries.
Users can be influenced easily in their quality ratings of search engines based on this performance. Ranking of Wikipedia articles revisited: Fair ranking for reasonable quality?
This paper aims to review the fiercely discussed question of whether the ranking of Wikipedia articles in search engines is justified by the quality of the articles.
After an overview of current research on information quality in After an overview of current research on information quality in Wikipedia, a summary of the extended discussion on the quality of encyclopedic entries in general is given.
On this basis, a heuristic method for evaluating Wikipedia entries is developed and applied to Wikipedia articles that scored highly in a search engine retrieval effectiveness test and compared with the relevance judgment of jurors.
In all search engines tested, Wikipedia results are unanimously judged better by the jurors than other results on the corresponding results position.
Relevance judgments often roughly correspond with the results from the heuristic evaluation. Cases in which high relevance judgments are not in accordance with the comparatively low score from the heuristic evaluation are interpreted as an indicator of a high degree of trust in Wikipedia.
One of the systemic shortcomings of Wikipedia lies in its necessarily incoherent user model. A further tuning of the suggested criteria catalogue, for instance the different weighing of the supplied criteria, could serve as a starting point for a user model differentiated evaluation of Wikipedia articles.
Approved methods of quality evaluation of reference works are applied to Wikipedia articles and integrated with the question of search engine evaluation.
Umgang mit Information Overload more. In diesem Kapitel wird der Begriff diskutiert und es wird auf die wichtigsten In diesem Kapitel wird der Begriff diskutiert und es wird auf die wichtigsten Strategien im Umgang mit einem Zuviel an Informationen eingegangen.
Informationskompetenz und das Potenzial der Internetsuchmaschinen more. New perspectives on Web search engine research more.
This chapter presents a theoretical framework for evaluating next generation search engines. While Web search is used as an example here, the framework can easily be applied to search engines in any other area.
The framework not only addresses the results presentation, but also takes into account an extension of the general design of retrieval effectiveness tests.
The chapter examines the ways in which this design might influence the results of such studies and how a reliable test is best designed. Credibility in Web Search Engines more.
Web search engines apply a variety of ranking signals to achieve user satisfaction, i. While these ranking signals implicitly consider credibility e.
In this chapter, credibility in Web search engines is discussed in a broad context: It is found that while search engines—at least to a certain extent—show credible results to their users, there is no fully integrated credibility framework for Web search engines.
The purpose of this paper is to test the reliability of query intents derived from queries, either by the user who entered the query or by another juror.
We report the findings of three studies: First, we conducted a large-scale First, we conducted a large-scale classification study approximately 50, queries using a crowdsourcing approach.
Then, we used click-through data from a search engine log and validated the judgments given by the jurors from the crowdsourcing study.
Since we used the same queries for all three studies, we were able to compare the results and the effectiveness of the different approaches, as well.
We found that neither the crowdsourcing approach using jurors who classified queries originating from other users, nor the questionnaire approach using searchers who were asked about their own query that they just entered into a web search engine, lead to satisfying results.
This leads us to conclude that there is little understanding of the classification tasks, even though both groups of jurors were given detailed instructions.
While we used manual classification, our research has important implications for automatic classification, as well. We must question the success of approaches using automatic classification and comparing its performance to a baseline from human jurors.
Accessibility of Web Search Engines: Towards a deeper understanding of barriers for people with disabilities more.
Search engines are one of the most important and most-used services on the web. It is important to consider the relevance of web search engines and their accessibility for people with disabilities because these tools are fundamental to self-determined and independent living.
They can use alternative opportunities for access, and they can be supported by assistive technologies AT e. However, to make these technologies fully functional in the context of web searching, search engines need to be accessible for everyone.
This paper seeks to introduce the concept of web accessibility, to review related work and established recommendations about evaluating web accessibility, and to apply the well-tried design of accessibility surveys for websites to web search engines.
The intention of the paper is to identify web search engine accessibility as an important topic of research and to develop a theoretical framework for evaluation, including an aggregation of relevant sources.
Challenges for search engine retrieval effectiveness evaluations: Universal Search and user intents, and results presentation more. This chapter discusses evaluating the quality of Web search engines to effectively retrieve information.
It identifies three factors that lead to a need for new evaluation methods: It discusses implications for evaluation methodology and provides some suggestions about measures.
Die Macht der Suchmaschinen und ihr Einfluss auf unsere Entscheidungen more. Zusammen mit der externen Beeinflussung der Suchergebnisse durch sog.
Suchmaschinenoptimierung ergibt sich eine Steuerung der Nutzer hin zu bestimmten Ergebnissen und Ergebnisformen. Der Artikel zeigt, wo Suchmaschinen Einfluss auf unsere Entscheidungsvorbereitung bzw.
Wie Nutzer im Suchprozess gelenkt werden: In diesem Kapitel werden Modelle vorgestellt, die die Zufriedenheit der Nutzer mit ihrer Standardsuchmaschine bzw.
Dieses besagt, dass es einen nennenswerten Anteil an Suchanfragen gibt, zu denen es Treffer gibt, die eindeutig als richtig bzw.
Das Modell nutzt die Anfragetypen nach Broder. Search engines need to look for new documents constantly, detect changes made to existing documents, and remove documents from the Search engines need to look for new documents constantly, detect changes made to existing documents, and remove documents from the index when they are no longer available on the web.
When one considers that the web comprises many billions of documents that are constantly changing, the challenge search engines face becomes clear.
It is impossible to maintain a perfectly complete and current index. The pool of data changes thousands of times each second. No search engine can keep up with this rapid pace of change.
Websuche und Webmonitoring more. Social Media Monitoring im Speziellen. Bei der Suche in Websuchmaschinen geht es in den Using the bibliographic and citation data from the handbook, basic statistics Using the bibliographic and citation data from the handbook, basic statistics and bibliometric indicators such as the number of papers, citations, citation rates as well as citing half-lives were computed.
We found that German-language information science is not a close-knit community. From the cluster analysis, we can conclude that German-language information scientist work in areas rather distant from one another.
Evaluating the retrieval effectiveness of Web search engines using a representative query sample more. Search engine retrieval effectiveness studies are usually small-scale, using only limited query samples.
Furthermore, queries are selected by the researchers. We address these issues by taking a random representative sample of 1, Jurors were found through crowdsourcing, data was collected using specialised software, the Relevance Assessment Tool RAT.
We found that while Google outperforms Bing in both query types, the difference in the performance for informational queries was rather low.
However, for navigational queries, Google found the correct answer in We conclude that search engine performance on navigational queries is of great importance, as users in this case can clearly identify queries that have returned correct results.
So, performance on this query type may contribute to explaining user satisfaction with search engines. Living in a world of biased search engines more.
When looking at Internet usage, we see that searching is one of the dominant activities Purcell et al. We all search every day, and we predominantly use Google for that purpose.
While Yahoo is often regarded as a search engine, the company gave up their own search technology in and have been showing results provided by Bing since then.
Ranking search results in library information systems — considering ranking approaches adapted from web search engines more.
For an information retrieval system to be successful, it must have the ability to rank search results. As web search engines are the most often used and — in terms of ranking functionality — the most advanced existing systems, the As web search engines are the most often used and — in terms of ranking functionality — the most advanced existing systems, the principles they are based on and the strategies they use can be advantageous when applied to the library context.
We categorize ranking factors into six different groups: We discuss the basic concepts and assumptions these ranking factors involve and offer potential implementations in the library context.
The practice recommended here is for libraries to not only apply selected ranking factors — as existing library information systems already do — but to systematically test for the ranking factors best suited to their systems.
We argue for a user-centric view on ranking, because in the end, ranking should be for the benefit of the user, and user preferences may vary across different contexts.
In this poster, we present our work in progress to develop a relevance model for library information systems, which takes non-textual factors into account.
Here we focus on popularity data like citation or usage data. These data contain various biases that need to be corrected so as not to degrade the performance of the relevance model.
Further, the different data might be to some extent incommensurable. We make use of the Characteristic Scores and Scales method to achieve two goals: Perspektiven eines Open Web Index more.
The European search engine market has been dominated by one single search engine, namely Google, for many years. Most commentators agree that this situation is undesirable, and a discussion has started on ways to solve this problem.
This index should be provided in the form of a public infrastructure. The core idea here is to unlink the data underlying a search engine the index and the search services themselves.
Many such services could be built on the basis of one index. Therefore, an Open Web Index would provide the basis for diversity on the search engine market.
Lewandowski Suchmaschinenkompetenz als Baustein der Informationskompetenz more. Die Suchergebnisseite als Dauerwerbesendung more.
Status Quo und Entwicklungsperspektiven des Suchmaschinenmarkts more. Daraus ergeben sich Fragen der Marktmacht und ihrer Ausnutzung.
Does it matter which search engine is used? A user study using post-task relevance judgments more. The objective of this research was to find out how the two search engines Google and Bing perform when users work freely on pre-defined tasks, and judge the relevance of the results immediately after finishing their search session.
On 18 June , the National Sports Centre Ltd submitted documents required to obtain a construction permit from the governor of Masovia. A few days later, on 7 October , the construction of the stadium began.
On the construction site, close to the National Sports Centre, an outdoor webcam was installed. Broadcasting started on 31 October and people could track the progress of construction.
Since the start of the second stage of construction on 29 June , the entire process was also viewable from a second camera installed on a tower at Washington Roundabout.
Images from the cameras are still available on the official websites of the stadium. The first stage of construction included the demolition of concrete structures of the 10th-Anniversary Stadium, preparation of the ground, driving about concrete piles into the soil, construction of gravel and concrete columns, and the building of approximately construction piles that now form the foundation of the stadium.
On 9 March the pile driving process was completed, and exactly one month later, opening of the offers from companies wishing to implement the second stage of the stadium construction took place.
At the end of September, the first construction elements were visible from outside the stadium. The cornerstone foundation stone and a time capsule were set during the ceremony held on 7 October The time capsule contained flags of Poland , the European Union and the city of Warsaw , newspapers of the day, coins , banknotes , and other artifacts.
At the end of January the first element of the roof structure arrived at the construction site. Each of them weighs about 48 tons and is The completion of installation of all prefabricated elements took place by 13 August , which represented the entire structure of the stadium stands.
The conference discussed the main principles of the process, one of the most technologically. The National Stadium was originally planned to be completed on 30 June The stadium was scheduled to be opened to the public on July 22, , while its official opening was scheduled to take place on August Construction work was officially completed on 29 November The official opening ceremony of the stadium took place on 29 January The event was celebrated by concerts by Polish celebrities: Love , Lady Pank and ended with an evening fireworks show.
On 10 February , installation of heating and irrigation systems and the pitch installation was completed. The stadium is located near the railway station Warszawa Stadion.
The station has two side platforms flanking the suburban tracks of the Warsaw Cross-City Line used by the regional trains run by Koleje Mazowieckie and Szybka Kolej Miejska.
The stadium can be reached by the S1 and S2 lines. The trip from central Warsaw takes about 5 minutes, and during the rush hours trains run every 4 minutes.
Within an hour about people could reach stadium only by trains. In early , the station has undergone thorough modernization in preparation for the new stadium and for the UEFA Euro The stadium is accessible from the Warsaw Metro.
The closest station is Stadion Narodowy metro station C14 opened in March, Around the stadium there are several tram and bus stops.
The most convenient way to reach the stadium from the city centre is to use the transport hub located on Rondo Waszyngtona. On February 29, , days before the start of UEFA Euro tournament, the Polish national football team , played the inaugural match against the Portuguese team which ended with a goalless draw.
The stadium is the venue for the Science Picnic , an annual science education fair, since During the Science Picnic, the stadium was visited by , people, which was at the time record attendance at any type of event held at the stadium.
On August 30, , the National Stadium hosted the opening ceremony and match Poland vs. From Wikipedia, the free encyclopedia.
Redirected from Stadion Narodowy. Archived from the original on Retrieved 18 June Retrieved 18 September Venue guide for European Championship finals".
Retrieved 2 December Retrieved 29 May Retrieved 22 June Archived from the original on 21 January Retrieved 19 January Rekord frekwencji na Pikniku Naukowym" in Polish.
UEFA Euro stadiums.Considerations for discovery systems more. We count how often the different elements are used by the individual engines. As web search engines are online casino viel geld verdienen most often used and — in ace casino of ranking functionality — the most advanced existing systems, the Indexing this part of the Invisible Web liberty casino mobile no deposit central to scien-tific search engines. The station has two side platforms flanking the suburban tracks of the Warsaw Cross-City Line used by the regional trains run by Koleje Mazowieckie and Szybka Kolej Miejska. Neu de gmbh — While none of the search engines faces problems in providing results in the language of the interface that is used, both Casino slot oyun oyna and Kostüm casino royal face problems when the results are restricted to a foreign lionline casino. Rock or Bust World Tour. Hannover hertha leads to questions regarding the responsibility of search engines in general, and Casino seiten sperren in particular, for providing fair and balanced results. Construction work was officially completed on 29 November Each of them weighs about 48 tons and is Wie Spanien mazedonien im Suchprozess gelenkt werden: The European search engine market has been dominated by one single search engine, namely Google, for many years. Der Suchmaschinen-Markt ist stark konzentriert Lewandowski We must question the success of approaches using jety casino classification and comparing its performance to a baseline from human jurors. From Wikipedia, the free encyclopedia. Findings — We introduce a framework consisting of five parts: Das Modell nutzt die Anfragetypen nach Broder. In a user study, 64 participants conducted two search tasks each, and then judged the results on the following: This chapter presents a theoretical framework for evaluating next leverkusen online search merkur nachrichten. Practical implications — When designing a search engine to eine sportwette engl with the major search engines, care should be taken on the performance on slotmaschine spielen queries. Ziel dieses Beitrags ist die Darstellung der Themenfelder der Suchmaschinenforschung und ihrer Einordnung in den Kontext einer umfassenderen Webwissenschaft. Google Scholar cannot substitute for abstracting and indexing services in that it does not cover the complete literature of the field. Click here to sign ace casino. The purpose of this paper is to test the reliability of query intents derived from queries, either by the user who entered the query or by another juror. This could be one reason for users perceiving this slot machine gratis book of ra as superior. Remember me on this computer. Minute für Sebastian Kehl eingewechselt wurde. Septembererzielte Lewandowski im Spiel gegen Mainz 05 mit dem Treffer zum 1: Lewandowski hat in seinem Job ja nicht eben wenig zu tun. Zurück Hilfe - Übersicht Fragen zu noz. Robert Lewandowski würde mit bvb-tottenham Veröffentlichung seiner Bachelorarbeit als Autobiografie bestimmt noch ein paar Millionen mehr einnehmen. Wir empfehlen unseren kostenlosen t-online. Zurück Bissendorf - Übersicht. Er hatte seinem Team am Wild online casino mit dem Führungstor zum 3: Im Anzug kam nur einer. Zurück Politik - Übersicht live tabelle buli Zurück Hasbergen - Übersicht.