23 research outputs found
BluePleiades a new solution for device discovery and scatternet formation in multi-hop Bluetooth networks
No full textIn this paper we introduce a novel and unified approach to the problems of device discovery and scatternet formation for the Bluetooth standard.We introduce a stochastic model for Bluetooth device discovery and prove that a protocol based on very simple local rules generates a topology that, with high probability, is connected and, crucially, has constant maximum degree. Based on this, we develop a new protocol for device discovery and scatternet formation for multi-hop BlueTooth networks. By means of extensive ns2 simulations we show that our solution is simple to implement, fast and requires low overhead, both for the device discovery and the scatternet formation phases, and leads to better performance when compared to the major approaches so far proposed in the literature
Localized techniques for broadcasting in wireless sensor networks
No full textIn this paper we tackle the problem of designing simple, localized, low energy consuming, reliable protocols for one-to-all communication in large scale wireless sensor networks. Our first proposed technique, called the Irrigator protocol, relies on the idea to first build a sparse overlay network, and then flood over it. The overlay network is set up by means of a simple, distributed, localized probabilistic protocol and spans all the sensor nodes with high probability. Based on the algorithmic ideas of the Irrigator protocol we then develop a second protocol, dubbed Fireworks, with similar performance that does not require any overlay network to be set up in advance. Asymptotic analytical results are provided which assess the reliability of the Irrigator and Fireworks techniques. The theoretical analysis of the proposed protocols is complemented and validated by a (simulation based) comparative performance evaluation that assesses several advantages of our new protocols with respect to gossiping and simple flooding. Differently from previous studies, we analyze and demonstrate the performance of our protocols for two different node distributions: The typical uniform distribution and a newly defined "hill" distribution, here introduced to capture some of the important and more realistic aspects of node deployment in heterogeneous terrain. Simulation results show that the proposed schemes achieve very good trade-offs between low overhead, low energy consumption and high reliability. In particular, the Irrigator and Fireworks protocols are more reliable than gossiping, and significantly reduce the number of links along which a message is sent over both flooding and gossiping. © 2007 Springer Science+Business Media, LLC
Fathers of a Still-born Past: Hindu Empire, Globality, and the Rhetoric of the Trikaal
No full textUndertaking a genealogical study of contemporary Hindu nationalism in India, this dissertation demonstrates how a new, metropolitan, and largely Anglophone version of cultural Hinduization is signaling a transformative shift in postcolonialism as political and aesthetic self-representation. The primary archive for the study ranges from foundational scriptural texts of the 'canon of Hinduism' and the writings of late 19th and early 20th century Hindu nationalists to traditions to the Anglophone political journalism of new-age Hindu intellectuals like Jay Dubashi, television productions of epics like the Mahabharata and the Ramayana, and contemporary Indian writing in English. This constellation of texts reveals that if an important phase of global postcolonial culture was founded in the difference between center and periphery, then we are now witnessing new aesthetic forms which recode national peripheral space as in fact coterminous with the space of the metropolitan-center. It is precisely such a recoding that the contemporary literature of the Indian diaspora writes itself into, democratizing differences between national and imperial contexts by inducting the urban hubs of the Global South into a continuum of supranational terminals for the mobility of virtual capital. The study demonstrates how such formations overlap with the language of contemporary Hinduization, as the latter in its own way equates neo-liberal economism, militarization, and technologism with the 'holy cows of Hindu scriptures.' Deploying religion as a flexible adjustment of linguistic and visual signs, rather than a scriptural tradition, this new 'rhetoric of Hindu India' violently yokes collusive neo-liberalism and cultural Hinduization on a single plane of normalized regularities. Such a plane of regularities promises a post-postcolonial culture which is no longer debilitated by theories of difference, whether between tradition and modernity, or nation and empire. In the face of this dangerous historical shift, my dissertation concludes that the task of the anti-imperial mind in our contemporary time is to destabilize such applications of political-cultural sameness. It is to return 'difference' to its philosophical beginnings in the indeterminacies of figurative language and to demonstrate how such indeterminacies are a refracting surface for the lived histories of capitalist-imperial unevenness
Response to taxane-based chemotherapy in metastatic eccrine porocarcinoma with extensive cutaneous involvement
No full textArterial Occlusion Precipitated by Cisplatinbased Chemotherapy
No full textCisplatin-based therapy is curative in testicular cancer. Adverse effects of cisplatin-based chemotherapy include dose-dependent myelosuppression, nephrotoxicity, neurotoxicity, and ototoxicity. By contrast, chemotherapy-associated vascular complications are unpredictable. Few incidents of digital gangrene with cisplatin have been reported. Here, we present a patient who developed arterial occlusion leading to gangrene of the toe after cisplatinbased chemotherapy.</jats:p
Preoperative prediction of surgical outcome in advanced ovarian cancer by computed tomographic scan and Eastern Cooperative Oncology Group-performance status
No full textBackground: Ovarian cancer represents the sixth most common cancer in women with almost 2 lakh new cases diagnosed every year. Present study was done to investigate the role of preoperative Computed Tomographic scan (CT) and Eastern Cooperative Group Performance Status (ECOG-PS) in the prediction of surgical outcome in advanced ovarian cancer.Methods: It is a Prospective cohort study of 41 cases of advanced ovarian cancer. Patients fulfilling the inclusion criteria were included after obtaining informed consent. A detailed history with general examination of the patient and relevant preoperative investigations were carried out. A preoperative Contrast Enhanced Computerised Tomography scan (CECT) was obtained and relevant CT parameters were analysed by a senior radiologist. Surgical outcome and its correlation with the CT scan findings and ECOG-PS were calculated by statistical analysis.Results: Among the 41 patients 23(56%) had optimal cytoreduction. Among the CT parameters, omental extension to spleen, stomach, lesser sac (specificity-100%, PPV-100%, NPV-60.5%), suprarenal lymph nodes >1 cm (specificity-100%, PPV-100%, NPV-59%), infrarenal lymph nodes >2 cm (specificity-95.7%%, PPV-66.7%, NPV-59.7%) were found as better predictors for suboptimal cytoreduction. ECOG-PS didn’t have a statistically significant association with surgical outcome.Conclusions: Presence of omental extension to adjacent structures and suprarenal lymphnodes on CT scan predicted suboptimal cytoreduction with 100% specificity. Though CT served as a valid tool in the preoperative prediction of surgical outcome in advanced ovarian malignancy, these results cannot be extrapolated to the general population nor can this be universally applied in determining the mode of treatment. Future studies are required to validate the findings of the present study on a larger scale
Isolated central nervous system relapse in a patient with systemic diffuse large B-cell lymphoma: Diagnostic and treatment challenges
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