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Two-ray ground reflection model has been widely used as the propagation model to investigate the performance of an ad hoc network. But two-ray model is too simple to represent a real world network. A more realistic model namely shadowing propagation model has been used in this investigation. Under shadowing propagation model, a mobile node may receive a packet at a signal level that is below a required threshold level. This low signal level affects the routing protocol as well as the mediumdoi:10.5281/zenodo.4087828 fatcat:y5ga4mhcajefrj5mgmvbox45pu
more »... l as the medium access control protocol of a network. An analytical model has been presented in this paper to investigate the shadowing effects on the network performance. The analytical model has been verified via simulation results. Simulation results show that the performance of a network becomes very poor if shadowing propagation model is used in compare to the simple two-ray model. Two solutions have also been proposed in this paper to overcome the effects of shadowing. One solution is a physical layer solution and the other one is a Medium Access Control (MAC) layer solution. Simulation results show that these two solutions reduce the shadowing effect and improve network performance.
Anwar is supported by the ARC discovery projects DP160102412 and DP170104747. ...arXiv:1702.06298v1 fatcat:eur5ymdxojgwpkxmwsttnkgupi
Lecture Notes in Computer Science
This paper considers the community interactions in online social media (OSM) as an OSM ecosystem and addresses the problem of modeling a Web forum ecosystem into a social graph. We propose a text mining method to model cross-thread interactions and interests of users in a Web forum ecosystem to generate an enriched social graph. In addition to modeling reply-to relationships between users, the proposed method models message-similarity relationship to keep track of all similar posts resultingdoi:10.1007/978-3-642-45392-2_8 fatcat:smmubc4cg5fjtkniq2j4tjzl7y
more »... posts resulting out of deviated discussions in different threads. Although, the proposed graph-generation method considers a reply-to relation as the primary means of linkage, it establishes links between clusters of similar posts instead of links between individual users, and the linkages between users can be derived from the existing linkages between clusters. The method starts with linking posts in each thread individually by identifying reply-to relationships, and applies an agglomerative clustering algorithm based on similarity of posts across the forum to group all posts into different clusters. Finally, relations between each pair of individual posts are mapped to create a link between clusters containing the posts. As a result, the generated social graph resembles a network of clusters that can also be presented at the granule of users who authored the posts to generate a social network of forum users, and at the same time it keeps information for all other users with similar interests.
As there is no such person with the name tarique anwar so popular, the results are highly varied. ... For example, on passing a search query on Google for the text "tarique anwar" to find exact matches, the top 20 returned results consist of pages referring to 12 different individuals with this name and ...doi:10.1016/j.ins.2014.02.050 fatcat:zxpiwkl2nzeszosiznijymvsrq
With the rapidly growing population in urban areas, these days the urban road networks are expanding at a faster rate. The frequent movement of people on them leads to traffic congestions. These congestions originate from some crowded road segments, and diffuse towards other parts of the urban road networks creating further congestions. This behavior of road networks motivates the need to understand the influence of individual road segments on others in terms of congestion. In this work, wedoi:10.1145/2806416.2806588 dblp:conf/cikm/AnwarLV015 fatcat:ozpbze3qgvbmpoa2p2ykt5lz4e
more »... n this work, we propose RoadRank, an algorithm to compute the influence scores of each road segment in an urban road network, and rank them based on their overall influence. It is an incremental algorithm that keeps on updating the influence scores with time, by feeding with the latest traffic data at each time point. The method starts with constructing a directed graph called influence graph, which is then used to iteratively compute the influence scores using probabilistic diffusion theory. We show promising preliminary experimental results on real SCATS traffic data of Melbourne.
Skyline queries play an important role in multi-criteria decision making applications of many areas. Given a dataset of objects, a skyline query retrieves data objects that are not dominated by any other data object in the dataset. Unlike standard skyline queries where the different aspects of data objects are compared directly, dynamic and reverse skyline queries adhere to the around-by semantics, which is realized by comparing the relative distances of the data objects w.r.t. a given query.doi:10.1145/2983323.2983764 dblp:conf/cikm/0003LRA16 fatcat:2apugp2yu5dwfczyvr6vkltj3y
more »... t. a given query. Though, there are a number of works on parallelizing the standard skyline queries, only a few works are devoted to the parallel computation of dynamic and reverse skyline queries. This paper presents an efficient quad-tree based data indexing scheme, called Q+Tree, for parallelizing the computations of the dynamic and reverse skyline queries. We compare the performance of Q+Tree with an existing quad-tree based indexing scheme. We also present several optimization heuristics to improve the performance of both of the indexing schemes further. Experimentation with both real and synthetic datasets verifies the efficiency of the proposed indexing scheme and optimization heuristics.
These ser-Email addresses: tAnwar@swin.edu.au (Tarique Anwar), firstname.lastname@example.org (Chengfei Liu), email@example.com (Hai L. ...doi:10.1016/j.is.2016.09.006 fatcat:5erx7t2izngjlk5vqdjovh7s7y
In this paper, we present a novel agglomerative clustering method to identify cliques in dark Web forums. Considering each post as an individual entity accompanying all the information about its thread, author, time-stamp, etc., we have defined a similarity function to identify similarity between each pair of posts as a blend of their contextual and temporal coherence. The similarity function is employed in the proposed clustering algorithm to group threads into different clusters that aredoi:10.1109/isi.2012.6284289 dblp:conf/isi/AnwarA12 fatcat:y6oabrs3hndkfeyags5pmmk7ki
more »... sters that are finally presented as individual cliques. The identified cliques are characterized using the homogeneity of posts therein, which also establishes the homogeneity of their authors and threads as well.
TARIQUE ANWAR is working as a postdoctoral research fellow at Macquarie University and CSIRO Data61, in Australia. ... Anwar et al.: Inferring Location Types with Geo-Social-Temporal Pattern Mining HAIFENG SHEN is an associate professor and the discipline leader of information technology with Peter Faber Business School ...doi:10.1109/access.2020.3018997 fatcat:rz67ryqm7velblvvspez33kzqq
Chronic suppurative otitis media (CSOM) is one of the commonest disease entities encountered in otolaryngology practice. Due to poor economic conditions poor hygiene lack of education and death of knowledge about the disease and its complications, we frequently encounter patients of CSOM with extracranial and intracranial complications. Among the intracranial complications otogenic brain abscess is one of the dreadest. With the improvement of healthcare and accessibility of the poor people todoi:10.1007/s12070-009-0085-6 pmid:23120653 pmcid:PMC3450085 fatcat:deddto4qcjbfjeyiwo7bkglkga
more »... he poor people to healthcare system and development of CT scan, MRI as diagnostic tools incidence of otogenic brain abscess is becoming less due to early diagnosis and interventions. The objectives of this study are to assess the incidence of brain abscesses to explore age, sex, variation to study clinical presentations and common pathogens responsible.
Lab on a Chip
We exploit the combinatorial advantage of electrokinetics and tortuosity of a cellulose-based paper network on laboratory grade filter paper for the development of a simple, inexpensive, yet extremely robust (shows constant performance for 12 days) 'paper-and-pencil'-based device for energy harvesting applications.doi:10.1039/c7lc01350g pmid:29722772 fatcat:cjyik6getrapflvvmbl7gibuki
In this paper, we present the design of a web content mining system to identify and extract aliases of a given entity from the Web in an automatic way. Starting with a pattern based information extraction process, the system applies n gram technique to extract candidate aliases. Thereafter, various statistical measures are applied to identify feasible aliases from them. The extracted aliases can be used to generate profiles of suspects and keep track of their movements on the Web usingdoi:10.1109/isi.2011.5984000 dblp:conf/isi/AnwarAA11 fatcat:j7acwzgpqvdxvmynkvhuttzoly
more »... Web using different identities.
We propose a framework as an extension of our earlier work (Abulaish & Anwar, 2011) to conceptualize text documents using tag clouds, where tags are identified as keyphrases. ... However, the prime focus of all these tasks remained as summarizing textual data using various techniques ranging from keyphrase extraction (Abulaish & Anwar, 2012) to question-answering (Light et al ...doi:10.4018/jaras.2013040104 fatcat:amvi4czwdre6zohqio4mmvq2um
Objective: To determine the mean decrease in homocysteine levels in patient of type II diabetes mellitus on vitamin B12 therapy. Study design: A quasi experimental study. Place and Duration: In the Medicine Unit II of Services Hospital Lahore for Six months duration from July 2018 to January 2019. Methods: 72 total patients were selected for the study during the six-month study period. Blood samples were taken for fasting blood glucose and homocysteine to evaluate inclusion criteria at thedoi:10.5281/zenodo.3218590 fatcat:etnne3ghc5athbijhrzpptuvsm
more »... riteria at the beginning of the study. Patients were given vitamin B12 500 mg / day for 6 weeks. Fasting homocysteine levels were determined again after 6 weeks. To ensure that bias is minimized, sample collection, transport and laboratory procedures are standardized. Using SPSS version 20.0 data analysis was done. Results: The mean difference in homocysteine before and after treatment was 0.39 (95% CI 0.36 to 0.42) and a statistically significant p value of <0.001. Conclusion: It was concluded that vitamin B12 have an important role in decreasing levels of homocysteine in patients with type II diabetes. Key words: Homocysteine levels, vitamin B12, diabetes mellitus type II.
Sirtuins (SIRT) belonging to the NADC dependent histone deacetylase III class of enzymes have emerged as master regulators of metabolism and longevity. However, their role in prevention of organismal aging and cellular senescence still remains controversial. In the present study, we now report upregulation of SIRT2 as a specific feature associated with stress induced premature senescence but not with either quiescence or cell death. Additionally, increase in SIRT2 expression was noted indoi:10.1080/15384101.2016.1189041 pmid:27229617 pmcid:PMC4968900 fatcat:qtf5zj72z5en5eb7inwf725hjy
more »... was noted in different types of senescent conditions such as replicative and oncogene induced senescence using multiple cell lines. Induction of SIRT2 expression during senescence was dependent on p53 status as depletion of p53 by shRNA prevented its accumulation. Chromatin immunoprecipitation revealed the presence of p53 binding sites on the SIRT2 promoter suggesting its regulation by p53, which was also corroborated by the SEAP reporter assay. Overexpression or knockdown of SIRT2 had no effect on stress induced premature senescence, thereby indicating that SIRT2 increase is not a cause of senescence; rather it is an effect linked to senescence-associated changes. Overall, our results suggest SIRT2 as a promising marker of cellular senescence at least in cells with wild type p53 status.
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