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Author(s): 

BAEZA YATES RICARDO

Issue Info: 
  • Year: 

    2003
  • Volume: 

    34
  • Issue: 

    -
  • Pages: 

    97-104
Measures: 
  • Citations: 

    1
  • Views: 

    131
  • Downloads: 

    0
Keywords: 
Abstract: 

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

NAJAFI SAJJAD | SOLEIMANIAN GHAREHCHOPOGH FARHAD

Issue Info: 
  • Year: 

    2019
  • Volume: 

    5
  • Issue: 

    4
  • Pages: 

    233-244
Measures: 
  • Citations: 

    0
  • Views: 

    93
  • Downloads: 

    56
Abstract: 

There are many algorithms for optimizing the SEARCH engine results, ranking takes place according to one or more parameters such as; Backward Links, Forward Links, Content, click through rate and etc. The quality and performance of these algorithms depend on the listed parameters. The ranking is one of the most important components of the SEARCH engine that represents the degree of the vitality of a WEB page. It also examines the relevance of SEARCH results with the user's query. In this paper, we try to optimize the SEARCH engine results ranking by using the hybrid of the structure-based algorithms (Distance Rank algorithm) and user feedback-based algorithms (Time Rank algorithm). The proposed method acts on multiple parameters and with more parameters it tries to get better results while keeping the complexity and running time of the algorithms. Average distance and average attention time have been evaluated on WEB pages and by using the obtained data, proposed method performance has been evaluated. We compare proposed method with several famous algorithms such as Time Rank, Page Rank, R Rank, WPR and sNorm(p) in this field by applying Precision@N (P@N), Average Precision (AP), Mean Reciprocal Rank (MRR), Mean Average Precision (MAP), Discounted Cumulative Gain (DCG) and Normalized Discounted Cumulative Gain (NDCG) criteria. The results indicate better performance in comparison with existing algorithms.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2010
  • Volume: 

    25
  • Issue: 

    2 (60)
  • Pages: 

    0-0
Measures: 
  • Citations: 

    1
  • Views: 

    1935
  • Downloads: 

    0
Abstract: 

The present investigation concerns evaluation, comparison and analysis of SEARCH options existing within WEB-based meta-SEARCH ENGINES. 64 meta-SEARCH ENGINES were identified. 19 meta-SEARCH ENGINES that were free, accessible and compatible with the objectives of the present study were selected. An author’s constructed check list was used for data collection. Findings indicated that all meta-SEARCH ENGINES studied used the AND operator, phrase SEARCH, number of results displayed setting, previous SEARCH query storage and help tutorials. Nevertheless, none of them demonstrated any SEARCH options for hypertext SEARCHing and displaying the size of the pages SEARCHed. 94.7% support features such as truncation, keywords in title and URL SEARCH and text summary display. The checklist used in the study could serve as a model for investigating SEARCH options in SEARCH ENGINES, digital libraries and other internet SEARCH tools.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2018
  • Volume: 

    4
Measures: 
  • Views: 

    157
  • Downloads: 

    0
Abstract: 

WE USE SEARCH ENGINES TO FIND OUR NEEDED INFORMATION THOUGH AMOUNT OF DATA. MOST OF THE TIME PEOPLE USE INTERNET TO GET INFORMATION ABOUT EVERY JOB. WEB SEARCH ENGINES OFTEN CONFUSE PEOPLE BY PRESENTING DIFFERENT RESULTS FOR SAME QUERIES. SEARCH ENGINES CREATE PROFILES FOR USERS TO SOLVE THIS PROBLEM. ACCORDING TO EACH USER'S PROFILE, SEARCH ENGINES REPRESENT RESULTS. OFTEN, USERS’ PRIVACY ARE IN ENDANGER BY USING THESE TOOLS. IN WEB SEARCH ENGINES RESULTS, WE NEED TO HAVE QUALITY AND PRIVACY PROTECTING BOTH TOGETHER. IN THIS ARTICLE WE PRESENT PROBLEMS THAT THREATEN THE USERS’ PRIVACY. WE ALSO REVIEWE HOW TO PREVENT WEB SEARCH ENGINES FROM VIOLATING THE USERS’ PRIVACY.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2007
  • Volume: 

    4
  • Issue: 

    1 (7)
  • Pages: 

    11-21
Measures: 
  • Citations: 

    0
  • Views: 

    1707
  • Downloads: 

    0
Abstract: 

Introduction: SEARCH tools including SEARCH ENGINES, Meta SEARCH ENGINES and Subject Directory are used to find the needed information in the World Wide WEB. The aim of this study was to compare selected SEARCH ENGINES and Meta SEARCH ENGINES in retrieving information concerning physiotherapy from the World Wide WEB to determine overlap among them.Methods: The current study was carried out using descriptive comparative methods. Seven SEARCH ENGINES and seven meta SEARCH ENGINES introduced by "SEARCHinginewatch.com" as the most frequently used ones, were analyzed. Then subject sub category of physiotherapy in eight subject fields were chosen from Medical Subject Headings (MeSH) as keywords. After choosing keywords, a SEARCH was made via using the SEARCH and Meta SEARCH ENGINES to identify how many results could be obtained by studied SEARCH ENGINES for each individual keyword. Finally the rate of overlap among SEARCH ENGINES and meta SEARCH ENGINES was measure in terms of percentage.The obtained data were then analyzed using descriptive methods and the SPSS.Results: According to the result of this study, "Altavista", All the WEB and "Google" showed the higher most retrieved results. Among the Meta SEARCH ENGINES "Ixquick" got the first rank. SEARCH results of "Altavista" and "all the WEB", "Vivsimon" and "Clusty" and "Metacrawler" and "Dogpile" showed large overlaps. Moreover, overlap percentage between SEARCH ENGINES and Meta SEARCH ENGINES with respect to keyword, was determined in this study.Conclusion: In this study, the percentage of overlap among selected SEARCH ENGINES and meta SEARCH ENGINES using the selected keywords, was shown to be 40% - 60%. This difference was because of variety of results ranking methods in different SEARCH ENGINES and Meta SEARCH ENGINES.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 1707

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Issue Info: 
  • Year: 

    2009
  • Volume: 

    5
  • Issue: 

    2 (10)
  • Pages: 

    121-129
Measures: 
  • Citations: 

    2
  • Views: 

    1637
  • Downloads: 

    0
Abstract: 

Introduction: One of the ways to retrieve the expert information from internet is using SEARCH tools. This reSEARCH was aimed to measure the relevance of documents retrieved from SEARCH and meta-SEARCH ENGINES in the field of pharmacology. Findings help WEB users, especially pharmaceutics reSEARCHes and specialists, to know the SEARCH tools cover more pharmaceutics information and use them to access the required information.Methods: In this descriptive reSEARCH, 6 major SEARCH and 6 major meta-SEARCH ENGINES, introduced by the WEBsite of www.SEARCHenginewatch.com as well-used internet SEARCH tools, were chosen. Pharmaceutics keywords were chosen from medical subject Headings (Mesh) and then selected terms of pharmacology were SEARCHed in each of SEARCH ENGINES. The first 10 results of SEARCH ENGINES were selected for evaluation of recall and precision. Data were analyzed with Excel.Results: Yahoo retrieved the most pharmaceutics documents and scored the highest rank 34%). Aol had 62% precision and 21% recall and retrieved the most relevant pharmaceutics documents. Dogpile retrieved the most pharmaceutics documents and scored the highest rank (22%), followed by Metacrawler (21%) and Info (19%). Excite had 62% precision and 22% recall and retrieved the most relevant pharmaceutics documents.Conclusion: SEARCH and meta-SEARCH ENGINES are suitable tools for amateur or professional users and they have suitable SEARCH capabilities and facilities. Although using SEARCH ENGINES in retrieving relevant documents is useful, but it is suggested that users follow the SEARCH in several SEARCH ENGINES to access the relevant documents among the vastly available sources on WEB.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2018
  • Volume: 

    15
  • Issue: 

    3 (37)
  • Pages: 

    3-12
Measures: 
  • Citations: 

    0
  • Views: 

    446
  • Downloads: 

    0
Abstract: 

Today, the growth of the internet and its high influence in individuals’ life have caused many users to solve their daily needs by SEARCH ENGINES and hence, the SEARCH ENGINES need to be modified and continuously improved. Therefore, evaluating SEARCH ENGINES to determine their performance is of paramount importance. In Iran, as well as other countries, extensive reSEARCHes are being performed on SEARCH ENGINES. To evaluate the quality of SEARCH ENGINES and continually improve their performance, it is necessary to evaluate SEARCH ENGINES and compare them to other existing ones. Since the speed plays an important role in the assessment of the performance, automatic SEARCH engine evaluation methods attracted grate attention. In this paper, a method based on the majority voting is proposed to assess the video SEARCH ENGINES. We introduced a mechanism to assess the automatic evaluation method by comparing its results with the results obtained by human SEARCH engine evaluation. The results obtained, shows 94 % correlation of the two methods which indicate the reliability of automated approach. In general, the proposed method can be described in three steps. Step 1: Retrieve first k_retrieve results of n different video SEARCH ENGINES and build the return result set for each written query. Step 2: Determine the level of relevance of each retrieved result from the SEARCH ENGINES Step 3: Evaluating the SEARCH ENGINES by computing different evaluation criteria based on decisions on relevance of the retrieved videos by each SEARCH engine Clearly, the main part of any evaluation system with the goal of evaluating the accuracy of SEARCH ENGINES is the second step. In this paper, we have tried to present a new solution based on the aggregation of votes in order to determine whether a result is relevant or not, as well as its level of relevance. For this purpose, for each query the return results from different SEARCH ENGINES are compared with each other, and the result returned by more than m of the SEARCH ENGINES (m; and the result of which their URLs (after the normalization) are similar to the normalized URL from the m-1 of the other SEARCH ENGINES, are considered as the relevant results. At the second level, the retrieved results will be compared in terms of content. In this way, after calculating the address-like similarity, all the results are transmitted to the motion vector extraction component to extract and store the motion vector. In the content based similarity algorithm, the set of motion vectors is initially considered as a sequence of motion vector. We, then, try to find the greatest similarity of the smaller sequence with the larger sequence. After this step, we will report the maximum similarity of the two videos. The process of finding the maximum similarity is that we consider a window with a smaller video sequence length. In this window we calculate and hold the similarity of two sequences. In the proposed method, after identifying the similarity between the return results of different SEARCH ENGINES, their level is ranked at three different levels: "unrelated" (0), "quantitatively related" (1) and "related" (2). Since Google's SEARCH engine is currently the world’ s largest and best-performing SEARCH engine, and most SEARCH ENGINES have been compared to it, and are also trying to achieve the same function, the first five Google SEARCH engine results are get the minimum relevance, by default, "slightly related". Then the similarity module is used to evaluate the similarity of the retrieved n results of the tested SEARCH ENGINES.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 446

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Issue Info: 
  • Year: 

    2009
  • Volume: 

    10
  • Issue: 

    2
  • Pages: 

    67-90
Measures: 
  • Citations: 

    0
  • Views: 

    1258
  • Downloads: 

    0
Abstract: 

This reSEARCH investigated the difficulties which SEARCH ENGINES are faced with in SEARCHing different forms of a word in the Persian language. A comparative survey and documentary method were used. ReSEARCH population consisted of three international SEARCH ENGINES (Google, Yahoo and AltaVista) which provide Persian SEARCH capability. Studying Persian texts, a checklist was developed which consisted of 17 keywords each of which represented one of the Persian language challenges. ReSEARCHers input keywords in SEARCH tools and recorded retrieved results for each SEARCH engine. Results showed that none of the SEARCH ENGINES considered linguistic challenges of the Persian Language. Furthermore, a significant relation existed between the form of words and the type of SEARCH engine.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 1258

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Issue Info: 
  • Year: 

    2009
  • Volume: 

    25
  • Issue: 

    1 (59)
  • Pages: 

    0-0
Measures: 
  • Citations: 

    0
  • Views: 

    282
  • Downloads: 

    0
Abstract: 

The present investigation was aimed to study the scope of presence of Dublin Core metadata elements and HTML meta tags in WEB pages. Ninety WEB pages were chosen by SEARCHing general SEARCH ENGINES (Google, Yahoo and MSN). The scope of metadata elements (Dublin Core and HTML Meta tags) present in these pages as well as existence of a significant correlation between presence of meta elements and type of SEARCH ENGINES were investigated. Findings indicated very low presence of both Dublin Core metadata elements and HTML meta tags in the pages retrieved which in turn illustrates the very low usage of meta data elements in WEB pages. Furthermore, findings indicated that there are no significant correlation between the type of SEARCH engine used and presence of metadata elements. From the standpoint of including metadata in retrieval of WEB sources, SEARCH ENGINES do not significantly differ from one another.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 282

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Issue Info: 
  • Year: 

    2016
  • Volume: 

    2
Measures: 
  • Views: 

    158
  • Downloads: 

    115
Abstract: 

NOWADAYS SEARCH ENGINES ARE RECOGNIZED AS THE PATHWAY FOR ACCESSING THE TREMENDOUS AMOUNT OF INFORMATION IN THE INTERNET. THEY PROVIDE AIDS AND SERVICES FOR SOLVING USERS’ DIFFERENT INFORMATION NEEDS. THUS, BEING ABLE TO EVALUATE THEIR EFFECTIVENESS AND PERFORMANCE IS CONSTANTLY GAINING IMPORTANCE BECAUSE THESE EVALUATIONS ARE USEFUL FOR BOTH DEVELOPERS AND USERS OF SEARCH ENGINES. DEVELOPERS CAN USE THE EVALUATION RESULTS FOR IMPROVING THEIR STRATEGIES AND PARADIGMS IN THE DEVELOPMENT OF SEARCH ENGINES. USERS, ON THE OTHER HAND, CAN IDENTIFY THE BEST PERFORMING SEARCH ENGINES AND IN A BETTER, QUICKER AND MORE ACCURATE WAY, GRATIFY THEIR INFORMATION NEEDS. EVALUATION OF SEARCH ENGINES CAN BE DONE IN TWO DIFFERENT WAYS, EITHER MANUALLY USING HUMAN ARBITRATORS OR AUTOMATICALLY USING AUTOMATIC MACHINERY APPROACHES WHICH DO NOT USE HUMAN ARBITRATORS AND THEIR JUDGMENTS. IN THE CASE OF MANUAL EVALUATION METHODS, BY NOW NUMEROUS AND STANDARD ACTIVITIES HAD BEEN CARRIED OUT BY ORGANIZERS AND PARTICIPANTS OF CONFERENCES LIKE TREC OR CLEF. IN THE CASE OF AUTOMATIC EVALUATION METHODS, UNLIKE VARIETY OF EFFORTS WHICH HAD BEEN DONE BY DIFFERENT RESEARCHERS, NO CATEGORIZATION AND ORGANIZATION OF SUCH METHODS EXISTS SO FAR. AS A RESULT, ANYONE THAT WANTS TO USE ONE OF THE AUTOMATIC EVALUATION METHODS MUST READ ALL THE RELEVANT LITERATURE OF THESE METHODS WHICH IS VERY TIME CONSUMING AND CONFUSING ACTIVITY. IN THIS PAPER, WE HAVE REVIEWED ALMOST ALL THE IMPORTANT REPORTED AUTOMATIC METHODS FOR EVALUATION OF SEARCH ENGINES. ANALYZING THE RESULTS OF THIS REVIEW, WE HAVE STATED THE REQUIREMENTS AND PREREQUISITES OF USING ANY OF THESE METHODS. AT THE END, A FRAMEWORK FOR SELECTING THE BEST PERTINENT METHOD FOR EACH EVALUATION SCENARIO HAS BEEN SUGGESTED.INSTEAD, AUTOMATIC METHODS OF EVALUATION ARE CHEAPER AND FASTER TO BE PERFORMED.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 158

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