Context-aware applications take into account the user's current context (e.g. the location). Many applications, e.g., tourist guides or office and meeting tools, use context information to adapt to a specific situation. Most of the actual systems use proprietary platforms and infrastructures to deal with context information, thus benefits are not directly available for a large community. The Wo...

Traditional problem determination techniques rely on static dependency models that are difficult to generate accurately in today’s large, distributed, and dynamic application environments such as e-commerce systems. In this paper, we present a dynamic analysis methodology that automates problem determination in these environments by 1) coarse-grained tagging of numerous real client requests as ...

This paper presents a vision-based approach to estimate the absolute position of a planetary lander during the last stages of the descent. The approach relies on the matching of landmarks detected in the descent imagery with landmarks previously detected in orbiter images. The matching process must be robust with respect to scale and radiometry differences in the image data: it mainly relies on...

Accurately estimating all link-level properties of a large network has proven to be very difficult. The measurements used for these estimates require significant collaboration from all endpoints on the network, significantly reducing their applicability for large scale Internet measurements. We present a scalable approach using a small number of hosts without collaboration from existing routers...

In this chapter, we present our Top-N methods for extracting clusters of documents which have originated from the article (Haraguchi, 2002). We first discuss a method for pinpoint clustering of Web pages by pseudo-clique search (Haraguchi & Okubo, 2006; Okubo et al., 2005) and then a method for finding implicit page groups (clusters) represented as formal concepts (Li et al., 2008). A huge coll...

in this paper a new process is presented for improving efficiency of cyclone de-dusting systems. the cyclone is coupled with a specially designed cylindrical chamber which includes a rotating tube inside it with air impinging nuzzles, drilled on the peripheral surface of the tube. the nuzzles help in pushing and throwing the particles to the outer radius distances during downward flow of dust i...

~ b s t r a c t Real-time position estimation for a descent lander is a critical technological need for many of NASA's planned in situ missions including landing on a number of bodies at locations of greatest scientific interest and sample return. In particular, it enables the capabiliq to land precisely and safely in a scientiJically promising but hazardous site and is a key technology to be d...

Laminar-turbulent transition in swept-wing boundary layers is typically caused by secondary instabilities of steady crossflow vortices (CFVs). So far, suction for laminar flow control (LFC) in three-dimensional boundary layers has been applied to reduce the crossflow and thus the growth of the primary CFV modes to CFVs. We investigate the influence of strong, localized suction (pinpoint suction...