scholarly journals Multi-Resolution Information Transmission in Mobile Environments

2005 ◽  
Vol 1 (1) ◽  
pp. 25-40 ◽  
Author(s):  
Hong Va Leong ◽  
Antonio Si
Keyword(s):  
Information Retrieval ◽  
Information Transmission ◽  
Transmission Mechanism ◽  
Transmission Model ◽  
Mobile Environments ◽  
Web Documents ◽  
Mobile Client ◽  
Document Cluster ◽  
Transmission Of Information ◽  
Mobile Clients

Mobile environments are characterized by low communication bandwidth and frequent disconnection. Conventional information retrieval and visualization mechanisms thus pose a serious challenge to mobile clients. There is a need for these clients to quickly perceive an overall picture of the information available to them, so as to enable them to discontinue the transmission of information units that are unlikely useful to them. We had proposed amulti-resolution transmission mechanismfor web documents. In particular, various organizational units of a document are transmitted to a mobile client in an order according to their information content, thereby allowing the client to terminate the transmission of a useless document at an earlier moment. In this paper, we generalize themulti-resolution transmission modelfor a document, and then extend that model into the multi-resolution transmission framework to cater for not only units within a document, but also for a collection of documents. We refer to the multi-resolution transmission mechanism for a particular document asintra-document multi-resolution transmissionmechanism and the extension to a document cluster asinter-document multi-resolution transmissionmechanism. With the integrated multi-resolution transmission framework, a mobile client can examine the important portions of the document cluster for an early grasp of the information therein, with the most important contents for each of those documents more readily available as well.

Rethinking Financial Contagion: Information Transmission Mechanism During the COVID-19 Pandemic.

2020 ◽  
Author(s):  
Larisa Yarovaya ◽  
Janusz Brzeszczynski ◽  
John W. Goodell ◽  
Brian M. Lucey ◽  
Chi Keung Lau
Keyword(s):  
Information Transmission ◽  
Transmission Mechanism ◽  
Financial Contagion

Extracting Visually Presented Element Relationships from Web Documents

2013 ◽  
Vol 7 (2) ◽  
pp. 13-29
Author(s):  
Radek Burget ◽  
Pavel Smrz
Keyword(s):  
Information Retrieval ◽  
World Wide ◽  
Visual Presentation ◽  
Generic Model ◽  
Individual Data ◽  
Web Documents ◽  
The World ◽  
Structured Information ◽  
The Individual ◽  
Document Format

Many documents in the World Wide Web present structured information that consists of multiple pieces of data with certain relationships among them. Although it is usually not difficult to identify the individual data values in the document text, their relationships are often not explicitly described in the document content. They are expressed by visual presentation of the document content that is expected to be interpreted by a human reader. In this paper, the authors propose a formal generic model of logical relationships in a document based on an interpretation of visual presentation patterns in the documents. The model describes the visually expressed relationships between individual parts of the contents independently of the document format and the particular way of presentation. Therefore, it can be used as an appropriate document model in many information retrieval or extraction applications. The authors formally define the model, the authors introduce a method of extracting the relationships between the content parts based on the visual presentation analysis and the authors discuss the expected applications. The authors also present a new dataset consisting of programmes of conferences and other scientific events and the authors discuss its suitability for the task in hand. Finally, the authors use the dataset to evaluate results of the implemented system.

Data Clustering

2007 ◽  
pp. 1-33 ◽  
Author(s):  
Dušan Husek ◽  
Jaroslav Pokorny ◽  
Hana Rezankova ◽  
Václav Snasel
Keyword(s):  
Information Retrieval ◽  
Data Clustering ◽  
Important Task ◽  
Clustering Methods ◽  
Web Documents ◽  
Web Communities

Document and information retrieval (IR) is an important task for Web communities. In this chapter, we introduce some clustering methods and focus on their use for the clustering, classification, and retrieval of Web documents.

Ensuring Serializability for Mobile-Client Data Caching

2009 ◽  
pp. 3021-3030
Author(s):  
Shin Parker ◽  
Zhengxin Chen
Keyword(s):  
Mobile Computing ◽  
Data Management ◽  
Mobile Environments ◽  
Prevention Policy ◽  
Two Phase ◽  
Mobile Client ◽  
Data Caching ◽  
Client Server ◽  
Client Data ◽  
Computing Environments

Data management in mobile computing has emerged as a major research area, and it has found many applications. This research has produced interesting results in areas such as data dissemination over limited bandwidth channels, location- dependent querying of data, and advanced interfaces for mobile computers (Barbara, 1999). However, handling multimedia objects in mobile environments faces numerous challenges. Traditional methods developed for transaction processing (Silberschatz, Korth & Sudarshan, 2001) such as concurrency control and recovery mechanisms may no longer work correctly in mobile environments. To illustrate the important aspects that need to be considered and provide a solution for these important yet “tricky” issues in this article, we focus on an important topic of data management in mobile computing, which is concerned with how to ensure serializability for mobile-client data caching. New solutions are needed in dealing with caching multimedia data for mobile clients, for example, a cooperative cache architecture was proposed in Lau, Kumar, and Vankatesh (2002). The particular aspect considered in this article is that when managing a large number of multimedia objects within mobile client-server computing environments, there may be multiple physical copies of the same data object in client caches with the server as the primary owner of all data objects. Invalid-access prevention policy protocols developed in traditional DBMS environment will not work correctly in the new environment, thus, have to be extended to ensure that the serializability involving data updates is achieved in mobile environments. The research by Parker and Chen (2004) performed the analysis, proposed three extended protocols, and conducted experimental studies under the invalid-access prevention policy in mobile environments to meet the serializability requirement in a mobile client/server environment that deals with multimedia objects. These three protocols, referred to as extended server-based two-phase locking (ES2PL), extended call back locking (ECBL), and extended optimistic twophase locking (EO2PL) protocols, have included additional attributes to ensure multimedia object serializability in mobile client/server computing environments. In this article, we examine this issue, present key ideas behind the solution, and discuss related issues in a broader context.

Individual Differences and Reliability of Information Transmission in Absolute Judgments of Loudness, Brightness and Line Lengths

1974 ◽  
Vol 39 (1) ◽  
pp. 239-246 ◽  
Author(s):  
Stephen G. Landau ◽  
Monte S. Buchsbaum ◽  
Richard Coppola ◽  
Miriam Sihvonen
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Information Transmission ◽  
Digit Span ◽  
Line Length ◽  
Intelligence Scale ◽  
Transmission Of Information ◽  
Processing Facility ◽  
The Central Nervous System ◽  
The Mean

Information transmission, as estimated from absolute judgments of loudness, brightness and line length, was measured in 35 normal Ss. Each S was tested on all modalities on each of three days. Individuals varied widely in their ability to transmit information and were consistent across modalities and days; reliabilities for loudness, brightness and line length between Days 2 and 3 were 0.72, 0.81, and 0.89 respectively. The mean intercorrelation between modalities was 0.40. WAIS Digit Span but no other intelligence scale was positively correlated with transmission of information. The results suggest the existence of a single information-processing facility in the central nervous system.

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