Every dazzling announcement of a new smart phone or trendy digital device is the prelude to more tons electronic waste (e-waste) being produced. This e-waste, scrap, often improperly added common garbage, rather than separated into suitable containers that facilitate recovery toxic materials and valuable metals. We are beginning become aware problems e-waste can generate our health environment. However, most us still not motivated enough take an active part in reversing situation. The aim...

Web prefetching is a technique that has been researched for years to reduce the latency perceived by users. For this purpose, several architectures have used, but no comparative study performed identify best architecture dealing with prefetching. This paper analyzes impact of focusing on limits reducing user's latency. To end, factors constrain predictive power each are analyzed and these theoretical quantified. Experimental results show element locate single prediction engine proxy, whose...

Web prefetching is one of the techniques proposed to reduce user's perceived latencies in World Wide Web. The spatial locality shown by accesses makes it possible predict future based on previous ones. A engine uses these predictions prefetch objects before user demands them. existing prediction algorithms achieved an acceptable performance when they were but high increase amount embedded per page has reduced their effectiveness current In this paper we show that most made are useless...

The popularity of Web objects, and by extension the sites, besides appearance clear footprints in user's accesses that show a considerable spatial locality, make possible to predict future based on current ones. This fact permits implement also prefetching techniques architecture order reduce latency perceived users. Although open literature presents some approaches this sense, huge variety algorithms, different scenarios conditions where they are applied very difficult compare performance...

The enormous potential of locality based strategies like caching and prefetching to improve Web performance motivates us propose a novel global framework for evaluation in scenarios where different parts the architecture interact. Unlike existing proposals our approach is fast flexible tool that allows represent faithfully behaviour each element order study, reproduce, evaluate design decrease userpsilas perceived latency when surfing Web.

This paper presents the Referrer Graph (RG) web prediction algorithm as a low-cost solution to predict next user accesses. RG is aimed at being used in real system with prefetching capabilities without degrading its performance. The learns from accesses and builds Markov model. These kinds kind of algorithms use sequence make predictions. Unlike previous model based proposals, differentiates dependencies objects same page different pages by using object URI referrer each request. permits us...

RESUMENEn este trabajo se aplica el análisis discriminante a la previsión de insolvencia las empresas seguros no vida utilizando ratios financieros como variables explicativas. En concreto, construyen reglas clasificación que permiten asignar una empresa al grupo potencialmente insolventes o solventes en t + 1, datos cuentas anuales períodos anteriores. El estudio limita cinco desfases, es decir, podremos realizar diagnóstico situación 1 desde hasta t−4. Se utilizan conjuntos distintos para...

Prefetching is an interesting technique for improving web performance by reducing the user-perceived latency when surfing web. Nevertheless, due to its speculative nature, prefetching can increase network traffic and server load. This could negatively affect overall system decrease quality of service. To minimize maintain under control these adverse effects, in this paper we propose intelligent mechanism that dynamically adjusts aggressiveness algorithm at side. end, also a estimation model...

Prevention and removal of fouling is often the most energy intensive process in Membrane Bioreactors (MBRs), responsible for 40% to 50% total specific consumed submerged MBRs. In past decade, methods were developed quantify qualify fouling, aiming support optimization MBR operation. Therefore, there a need an evaluation lessons learned how proceed. this article, five different measuring activated sludge filterability critical flux are described, commented evaluated. Both parameters...

Proxy caches have become an important mechanism to reduce latencies. Efficient management techniques for proxy which exploits Web-objects inherent characteristics are essential key reach good performance. One segment of the replacement algorithms being applied today multikey that use several or object decide objects must be replaced. This feature is not considered in most current simulators. In this paper we propose a proxy-cache platform check performance Web based on and algorithms. The...

The popularity of Web objects, and by extension the sites, besides appearance clear footprints in user's accesses that show a considerable spatial locality, make possible to predict future based on current ones. This fact permits implement also prefetching techniques architecture order reduce latency perceived users. Although open literature presents some approaches this sense, huge variety algorithms, different scenarios conditions where they are applied very difficult compare performance...

Despite the wide and intensive research efforts focused on Web prediction prefetching techniques aimed to reduce user's perceived latency, few attempts implement use them in real environments have been done, mainly due their complexity supposed limitations that low user available bandwidths imposed years ago. Nevertheless, current open a new scenario for becomes again an interesting option improve web performance. This paper presents Delfos, framework perform predictions environment tries...

The increasing popularity of web applications has introduced a new paradigm where users are no longer passive consumers but they become active contributors to the Web, specially in contexts social networking, blogs, wikis or e-commerce. In this paradigm, contents and services even more dynamic, which consequently increases level dynamism user's behavior. Moreover, trend is expected rise incoming Web. This major adversity define model representative workload, fact, characteristic not fully...

The workload used for evaluating and obtaining performance results in shared memory multiprocessors are widely heterogeneous. Traces have been over several decades as computers systems grew power, semantic benchmarks, like SPLASH2, became the most common workloads. Unfortunately, few benchmarks available. Recently, self-similar studies performed computer domains. In this paper, we study properties of SPLASH2 benchmarks. Each benchmark has studied independently, all exhibit a clearly...