The World Wide Web is growing rapidly and many search engines do not cover all the visible pages. Therefore, a more effective crawling method is required to collect more accurate data. In this paper, we introduce an effective focused web crawler containing smart methods. In text analysis, similarity measurement applies to different parts of the Web pages including title, body, anchor text and U...

Web crawler design presents many different challenges: architecture, strategies, performance and more. One of the most important research topics concerns improving the selection of “interesting” web pages (for the user), according to importance metrics. Another relevant point is content freshness, i.e. maintaining freshness and consistency of temporary stored copies. For this, the crawler perio...

Focused crawling is an efficient mechanism for discovering resources of interest on the web. Link structure is an important property of the web that defines its content. In this thesis, FOCUS a novel focused crawler is described, which primarily uses the link structure of the web in its crawling strategy. It uses currently available search engine APIs, provided by Google, to construct a layered...

DEFINITION Part of the success of the World Wide Web arises from its lack of central control, because it allows every owner of a computer to contribute to a universally shared information space. The size and lack of central control presents a challenge for any global calculations that operate on the web as a distributed database. The scalability issue is typically handled by creating a central ...

Unlike horizontal crawling, vertical crawling involves two counteracting forces: torque rotating the body around its center of mass and gravity resisting forward movement. The influence of these forces on kinematics has been examined in the soft-bodied larval stage of Manduca sexta. We found that crawling and climbing are accomplished using the same movements, with both segment timing and prole...

Locomotion in an organism is a consequence of the coupled interaction between brain, body and environment. Motivated by qualitative observations and quantitative perturbations of crawling in Drosophila melanogaster larvae, we construct a minimal integrative mathematical model for its locomotion. Our model couples the excitation-inhibition circuits in the nervous system to force production in th...

A very simple, one-dimensional, discrete, autonomous model of cell crawling is proposed; the model involves only three or four coupled first-order differential equations. This form is sufficient to describe many general features of cell migration, including both steady forward motion and oscillatory progress. Closed-form expressions for crawling speeds and internal forces are obtained in terms ...

The fruit fly Drosophila melanogaster is a widely used model for cell biology, development, disease, and neuroscience. The fly's power as a genetic model for disease and neuroscience can be augmented by a quantitative description of its behavior. Here we show that we can accurately account for the complex and unique crawling patterns exhibited by individual Drosophila larvae using a small set o...

Parallel web crawling is an important technique employed by large-scale search engines for content acquisition. A commonly used inter-processor coordination scheme in parallel crawling systems is the link exchange scheme, where discovered links are communicated between processors. This scheme can attain the coverage and quality level of a serial crawler while avoiding redundant crawling of page...

Although boys outshine girls in a range of motor skills, there are no reported gender differences in motor performance during infancy. This study examined gender bias in mothers' expectations about their infants' motor development. Mothers of 11-month-old infants estimated their babies' crawling ability, crawling attempts, and motor decisions in a novel locomotor task-crawling down steep and sh...