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Nurzaman Ahmed

Bio: Nurzaman Ahmed is an academic researcher from North Eastern Hill University. The author has contributed to research in topics: Network packet & Computer science. The author has an hindex of 8, co-authored 34 publications receiving 582 citations. Previous affiliations of Nurzaman Ahmed include The Aga Khan University Hospital & King's College London.

Papers
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Journal ArticleDOI
TL;DR: A cross-layer-based channel access and routing solution for sensing and actuating is proposed for monitoring and controlling agriculture and farms in rural areas and reduces network latency up to a certain extent.
Abstract: Internet of Things (IoT) gives a new dimension in the area of smart farming and agriculture domain. With the use of fog computing and WiFi-based long distance network in IoT, it is possible to connect the agriculture and farming bases situated in rural areas efficiently. To focus on the specific requirements, we propose a scalable network architecture for monitoring and controlling agriculture and farms in rural areas. Compared to the existing IoT-based agriculture and farming solutions, the proposed solution reduces network latency up to a certain extent. In this, a cross-layer-based channel access and routing solution for sensing and actuating is proposed. We analyze the network structure based on coverage range, throughput, and latency.

356 citations

Journal ArticleDOI
TL;DR: There is only weak evidence for the superiority of any interventions over placebo for the palliation of symptomatic oral lichen planus, and further research involving large placebo‐controlled, randomized clinical trials is needed.
Abstract: Summary Background To date, there is only weak evidence for the superiority of any interventions over placebo for the palliation of symptomatic oral lichen planus (LP). Further research involving large placebo-controlled, randomized clinical trials is needed. These will require carefully selected and standardized outcome measures. Objectives To formulate a scoring system for intraoral LP. Methods One hundred and fifty-six patients with biopsy-confirmed LP were scored at the first and subsequent visits according to (i) extent of site involvement, (ii) disease activity at each site and (iii) an overall pain score as reported by the patient. Overall differences between clinical variants of LP were analysed using the Kruskal–Wallis test and pairwise differences by the Mann–Whitney U-test. Clinical sensitivity (Wilcoxon signed-rank test) was assessed by scoring patients before and after treatment (n = 23). Results Reticular LP (n = 48) was the commonest single type of clinical presentation, followed by ulcerative (n = 30), atrophic (n = 22), desquamative (n = 18) and plaque (n = 1). The median severity and activity scores were 13/6 (reticular), 39/20 (ulcerative), 20/9 (atrophic) and 23/11 (desquamative). Two or more clinical variants were seen in 37 cases. Statistical significance was observed for differences between clinical variants (P < 0·0001) and variation in scores (P < 0·01) when ulcerative LP was compared with all other types. Clinical sensitivity was statistically significant (P < 0·01), while reproducibility was high and allowed the response to therapy to be easily assessed. Conclusions It is suggested that this scoring system is easy to use, reproducible and sensitive enough to detect clinical responses to therapy.

111 citations

Journal ArticleDOI
TL;DR: The simulation results show that the new 802.11ah standard performs better than the 802.15.4 in terms of association time, throughput, delay, and coverage range.

103 citations

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TL;DR: In this article, the authors focused on characteristic MR imaging features of Aspergillosis (of sinonasal origin) in immunocompetent patients and found that early diagnosis based on clinical radiological imaging may have an impact on final clinical outcome.
Abstract: Background. Craniocerebral invasive Aspergillosis of sino-nasal origin has been reported with a very high mortality due to a peculiarly fulminant clinical course. Early diagnosis based on clinical radiological imaging may have an impact on final clinical outcome. This retrospective study focuses on characteristic MR imaging features of Aspergillosis (of sinonasal origin) in immunocompetent patients.

56 citations

Journal ArticleDOI
TL;DR: An exact solution to the problem of a transient free convective mass transfer flow of a Newtonian non-Grey optically thin fluid past a suddenly started infinite vertical plate embedded in a porous medium with ramped wall temperature as well as ramped plate velocity in presence of appreciable thermal radiation and first-order chemical reaction is presented in this paper.
Abstract: An exact solution to the problem of a transient free convective mass transfer flow of a Newtonian non-Grey optically thin fluid past a suddenly started infinite vertical plate embedded in a porous medium with ramped wall temperature as well as ramped plate velocity in presence of appreciable thermal radiation and first-order chemical reaction is presented. The resulting system of equations governing the flow is solved by employing Laplace Transform technique in closed form. Detailed computations of the influence of ramped velocity parameter A, radiation parameter Q, Reynolds number Re, Schmidt number Sc, porosity parameter S and chemical reaction parameter K on the variations in the fluid velocity, fluid temperature, fluid concentration, and skin friction, Nusselt number and Sherwood number at the plate are demonstrated graphically. The results show that the effect of the ramped parameter A accelerates the fluid flow substantially. Further, our investigation reveals the fact that the viscous drag at the plate gets increased due to chemical reaction in case of ramped plate temperature. Comparison of some of the results of the present work is made with previously published results under special cases, and shows a good agreement. Key words: Ramped plate velocity, ramped plate temperature, thermal radiation, chemical reaction, optically thin, porosity.

35 citations


Cited by
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Journal ArticleDOI
TL;DR: IDSA considers adherence to these guidelines to be voluntary, with the ultimate determination regarding their application to be made by the physician in the light of each patient's individual circumstances.
Abstract: It is important to realize that guidelines cannot always account for individual variation among patients. They are not intended to supplant physician judgment with respect to particular patients or special clinical situations. IDSA considers adherence to these guidelines to be voluntary, with the ultimate determination regarding their application to be made by the physician in the light of each patient's individual circumstances.

1,745 citations

Journal ArticleDOI
TL;DR: The IoT ecosystem is presented and how the combination of IoT and DA is enabling smart agriculture, and future trends and opportunities are provided which are categorized into technological innovations, application scenarios, business, and marketability.
Abstract: The surge in global population is compelling a shift toward smart agriculture practices. This coupled with the diminishing natural resources, limited availability of arable land, increase in unpredictable weather conditions makes food security a major concern for most countries. As a result, the use of Internet of Things (IoT) and data analytics (DA) are employed to enhance the operational efficiency and productivity in the agriculture sector. There is a paradigm shift from use of wireless sensor network (WSN) as a major driver of smart agriculture to the use of IoT and DA. The IoT integrates several existing technologies, such as WSN, radio frequency identification, cloud computing, middleware systems, and end-user applications. In this paper, several benefits and challenges of IoT have been identified. We present the IoT ecosystem and how the combination of IoT and DA is enabling smart agriculture. Furthermore, we provide future trends and opportunities which are categorized into technological innovations, application scenarios, business, and marketability.

814 citations

01 Jan 2008

443 citations

Journal ArticleDOI
TL;DR: The article explains the major components of IoT based smart farming, including network architecture and layers, network topologies used, and protocols, and some open research issues and challenges in IoT agriculture field have been presented.
Abstract: Internet of things (IoT) is a promising technology which provides efficient and reliable solutions towards the modernization of several domains. IoT based solutions are being developed to automatically maintain and monitor agricultural farms with minimal human involvement. The article presents many aspects of technologies involved in the domain of IoT in agriculture. It explains the major components of IoT based smart farming. A rigorous discussion on network technologies used in IoT based agriculture has been presented, that involves network architecture and layers, network topologies used, and protocols. Furthermore, the connection of IoT based agriculture systems with relevant technologies including cloud computing, big data storage and analytics has also been presented. In addition, security issues in IoT agriculture have been highlighted. A list of smart phone based and sensor based applications developed for different aspects of farm management has also been presented. Lastly, the regulations and policies made by several countries to standardize IoT based agriculture have been presented along with few available success stories. In the end, some open research issues and challenges in IoT agriculture field have been presented.

400 citations

Journal ArticleDOI
TL;DR: In this article, a comprehensive survey of massive access design for B5G wireless networks is presented, from the perspectives of theory, protocols, techniques, coverage, energy, and security.
Abstract: Massive access, also known as massive connectivity or massive machine-type communication (mMTC), is one of the main use cases of the fifth-generation (5G) and beyond 5G (B5G) wireless networks. A typical application of massive access is the cellular Internet of Things (IoT). Different from conventional human-type communication, massive access aims at realizing efficient and reliable communications for a massive number of IoT devices. Hence, the main characteristics of massive access include low power, massive connectivity, and broad coverage, which require new concepts, theories, and paradigms for the design of next-generation cellular networks. This paper presents a comprehensive survey of massive access design for B5G wireless networks. Specifically, we provide a detailed review of massive access from the perspectives of theory, protocols, techniques, coverage, energy, and security. Furthermore, several future research directions and challenges are identified.

311 citations