Our system provides a working implementation of the SMTP and POP3 protocols and our evaluation shows that
In this paper we present the design and implementation of a scalable e-mail service over the Cassandra eventually-consistent This prediction of content quality could lead to an improved organisation of Reddit content (re-ranking) for user consumption and future information retrieval. We show that it is possible to infer information quality on Reddit using the expertise of the authors. In our study, we explore the estimation of relative user expertise through various content-agnostic approaches. Besides that, managing the large collection of content on Reddit is expensive. We argue that this approach suffers from the cold start in collecting user votes and is at risk of user bias, particularly a group-think mentality. Reddit relies on the Wisdom of the Crowd (WotC) from its community as well as selected moderators to manage its content. Reddit as a social curation site relies on its users to curate content from the World Wide Web (This additional content is of varying quality however - ranging from meaningful information to misleading content depending on the reliability, expertise and intention of the authors. Furthermore, we show the results of performance experiments using a prototype implementation.
#KLEMS GARAGE INC SOFTWARE#
In this paper we present the protocol subset used and discuss the compatibility problems on the protocol and client software level. A small subset of HTTP and TCP is statelessly implemented to display simple busy messages or relevant news updates to the end user with only few resources. Therefore, we propose a mean to efficiently block connection attempts and to keep the user informed at the same time. Simply restricting the number of connections leads to very technical error messages displayed by the users' client software if at all. Classical approaches try to distinguish between real user and harmful requests, which is not applicable in this scenario. While the bots do not stop their attack until told so by their operator, the user try repeatedly to access the site without knowing that the repeated reloads effectively increase the web server's overload.
In contrast to the classical model of distributed denial of service (DDoS) attacks, such a so-called flash effect situation is not triggered by a bulk of bots just aiming at hurting the system but by humans with a high interest in the content of the web site itself. Therefore, a spontaneous increase in the number of visitors, e.g., based on news reports or events, easily brings a web server in an overload situation. At the same time, web applications become more and more complex. The web is a crucial source of information nowadays. Thus, Geostry offers all aspects from setting up a network, providing access to geo-related information and replication methods to provide accessibility in times of high loads. Thereby, the information is replicated for as long as the rush lasts. To cope with the run on the single computer that provides this specific information, Geostry offers dynamic replication mechanisms. Sometimes, a certain piece of information raises particular interest. They - among other things - enable the user to search for information e.g. To selectively find geographic-related information Geostry supports spatial queries. Setting up the network is realized through a decentralized bootstrapping protocol based on an existing Internet service to provide robustness and availability. Geostry bases on a peer-to-peer system and thus incorporates all the advantages, such as self-organization, fairness (in terms of costs), scalability and many more. In contrast to existing solutions our approach is not based on a server-client architecture. In this thesis, we present a system that allows for an easy access to this information. The result is a symbiosis of the real world and digital information spaces. Not only can existing objects of the real world and their state be mapped into these world models, but additional information can be linked to these objects as well. By embedding this information into a model of the real world, which nowadays can be modeled very realistically using sophisticated 3D modeling techniques, it is possible to generate powerful digital world models. Thereby, everyday objects can gather information about their state and their environment. An interesting development is summarized by the notion of ”Ubiquitous Computing”: In this area, miniature systems are integrated into everyday objects making these objects ”smart” and able to communicate.
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