Future RAN architecture: SD-RAN through a general-purpose processing platform

In this article, we identify and study the potential of an integrated deployment solution for energy-efficient cellular networks combining the strengths of two very active current research themes: 1) software-defined radio access networks (SD-RANs) and 2) decoupled signaling and data transmissions, or beyond cellular green generation (BCG2) architecture, for enhanced energy efficiency. While SD-RAN envisions a decoupled centralized control plane and data-forwarding plane for flexible control, the BCG2 architecture calls for decoupling coverage from the capacity and coverage provided through an always-on low-power signaling node for a larger geographical area; the capacity is catered by various on-demand data nodes for maximum energy efficiency. In this article, we show that a combined approach that brings both specifications together can not only achieve greater benefits but also facilitate faster realization of both technologies. We propose the idea and design of a signaling controller that acts as a signaling node to provide always-on coverage, consuming low power, and at the same time host the control plane functions for the SDRAN through a general-purpose processing platform. The phantom cell concept is also a similar idea where a normal macrocell provides interference control to densely deployed small cells, although our initial results show that the integrated architecture has a much greater potential for energy savings than phantom cells

Accentuating the Importance of Teaching Poetry in an ESL Classroom

With the sudden growth of English Language Teaching (ELT) programmes in India during the last few decades and more specifically towards the last decade of the past millennium, the role of linguistics came to be quite often over emphasized in ELT. They became the obiter dicta in all aspects relating to ELT from curriculum designing to evaluating the terminal and expected achievement results. These linguistic experts went in the other extreme directions as the experts of literature had done earlier. The literary experts had looked with disdain at teaching language items separately from literary text and strongly disfavoured language drills at the under-graduate level. The teaching of grammar, independent of literary text, was considered almost anathema. Where the situation favoured, the linguists tended to go in the direction where only language items could be taught without any aid from literary text. However, when these linguistic enthusiasts realized that drill-oriented classes, especially with adult learners, could be monotonous and eventually counterproductive, they conceded to use prose pieces for teaching language items. Teaching of poetry for learning English or augmenting the already acquired expressive power of the learner is still not widely favoured. The focus of this paper is to emphasize the importance of teaching poetry to second language learners. It discusses how poetry helps in learning the features of modern English, and enables the learners to see how English linguistic system is used for communication

Will SDN be part of 5G?

For many, this is no longer a valid question and the case is considered settled with SDN/NFV (Software Defined Networking/Network Function Virtualization) providing the inevitable innovation enablers solving many outstanding management issues regarding 5G. However, given the monumental task of softwarization of radio access network (RAN) while 5G is just around the corner and some companies have started unveiling their 5G equipment already, the concern is very realistic that we may only see some point solutions involving SDN technology instead of a fully SDN-enabled RAN. This survey paper identifies all important obstacles in the way and looks at the state of the art of the relevant solutions. This survey is different from the previous surveys on SDN-based RAN as it focuses on the salient problems and discusses solutions proposed within and outside SDN literature. Our main focus is on fronthaul, backward compatibility, supposedly disruptive nature of SDN deployment, business cases and monetization of SDN related upgrades, latency of general purpose processors (GPP), and additional security vulnerabilities, softwarization brings along to the RAN. We have also provided a summary of the architectural developments in SDN-based RAN landscape as not all work can be covered under the focused issues. This paper provides a comprehensive survey on the state of the art of SDN-based RAN and clearly points out the gaps in the technology.Comment: 33 pages, 10 figure

Future RAN Architecture: SD-RAN Through a General-Purpose Processing Platform

In this article, we identify and study the potential of an integrated deployment solution for energy-efficient cellular networks combining the strengths of two very active current research themes: 1) software-defined radio access networks (SD-RANs) and 2) decoupled signaling and data transmissions, or beyond cellular green generation (BCG2) architecture, for enhanced energy efficiency. While SD-RAN envisions a decoupled centralized control plane and data-forwarding plane for flexible control, the BCG2 architecture calls for decoupling coverage from the capacity and coverage provided through an always-on low-power signaling node for a larger geographical area; the capacity is catered by various on-demand data nodes for maximum energy efficiency. In this article, we show that a combined approach that brings both specifications together can not only achieve greater benefits but also facilitate faster realization of both technologies. We propose the idea and design of a signaling controller that acts as a signaling node to provide always-on coverage, consuming low power, and at the same time host the control plane functions for the SDRAN through a general-purpose processing platform. The phantom cell concept is also a similar idea where a normal macrocell provides interference control to densely deployed small cells, although our initial results show that the integrated architecture has a much greater potential for energy savings than phantom cells

Is GeneXpert MTB/RIF assay reliable for the diagnosis of pleural tuberculosis?

Background: Tuberculosis is the most common cause of infectious diseases related mortality globally. Tuberculous pleural effusion is a common presentation of extra pulmonary tuberculosis and a diagnostic challenge most of time. The rapid diagnosis of tuberculous pleural effusion is essential for early treatment. GeneXpert is a new tool for rapid diagnosis but the ability to correctly diagnose of GeneXpert is a vital concern in the diagnosis of extra pulmonary tuberculosis. Objective: To determine the accurate ability of diagnosing the pleural fluid GeneXpert MTB/RIF assessment in the suspected pleural tuberculosis patients considering as gold standard to the pleural biopsy. Methods: This study was a validational cross sectional survey and it was conducted in pulmonology department of –removed for blind review---from 1st July to 31st December 2018 after approval of IRB. Participants with suspected pathology ≥ 18 year with exudative pleural effusion were included in the study. By implementing the process of standard technique, closed needle pleural biopsy was executed by means of ABRAM’S needle. The collected samples of patients were sent to the pathology department of Pakistan Institute of Medical Sciences for histopathology. Pleural fluid was referred to National Institute of Health Islamabad for GeneXpert MTB/RIF assessment on the alike day and reports were assembled. All findings were entered in a structured Proforma. Data was entered in SPSS version 20 and analyzed. Results: Total 180 patients were included; 65.6% patients were male. When the sensitivity of pleural fluid GeneXpert MTB/RIF examination was calculated it was 10.4% whereas, the calculated specificity was 72.8%. While +ve predictive value of GeneXpert was 22.2% and -ve predictive value was 52.1%. Likelihood ratio was 8.25 and ROC curve also showed similar values.  Conclusion: The sensitivity of pleural fluid GeneXpert MTB/RIF assay is very low and specificity is moderate for diagnosis of pleural tuberculosis when compared with pleural biopsy. Key words: Extra pulmonary tuberculosis; GeneXpert; Pleural biopsy; Tuberculosis

Is GeneXpert MTB/RIF assay reliable for the diagnosis of pleural tuberculosis?

Background: Tuberculosis is the most common cause of infectious diseases related mortality globally. Tuberculous pleural effusion is a common presentation of extra pulmonary tuberculosis and a diagnostic challenge most of time. The rapid diagnosis of tuberculous pleural effusion is essential for early treatment. GeneXpert is a new tool for rapid diagnosis but the ability to correctly diagnose of GeneXpert is a vital concern in the diagnosis of extra pulmonary tuberculosis. Objective: To determine the accurate ability of diagnosing the pleural fluid GeneXpert MTB/RIF assessment in the suspected pleural tuberculosis patients considering as gold standard to the pleural biopsy. Methods: This study was a validational cross sectional survey and it was conducted in pulmonology department of –removed for blind review---from 1st July to 31st December 2018 after approval of IRB. Participants with suspected pathology ≥ 18 year with exudative pleural effusion were included in the study. By implementing the process of standard technique, closed needle pleural biopsy was executed by means of ABRAM’S needle. The collected samples of patients were sent to the pathology department of Pakistan Institute of Medical Sciences for histopathology. Pleural fluid was referred to National Institute of Health Islamabad for GeneXpert MTB/RIF assessment on the alike day and reports were assembled. All findings were entered in a structured Proforma. Data was entered in SPSS version 20 and analyzed. Results: Total 180 patients were included; 65.6% patients were male. When the sensitivity of pleural fluid GeneXpert MTB/RIF examination was calculated it was 10.4% whereas, the calculated specificity was 72.8%. While +ve predictive value of GeneXpert was 22.2% and -ve predictive value was 52.1%. Likelihood ratio was 8.25 and ROC curve also showed similar values.  Conclusion: The sensitivity of pleural fluid GeneXpert MTB/RIF assay is very low and specificity is moderate for diagnosis of pleural tuberculosis when compared with pleural biopsy. Key words: Extra pulmonary tuberculosis; GeneXpert; Pleural biopsy; Tuberculosis

Expectations in a Marriage Proposal: A Gender-Based Comparison in Pakistan

To determine the differences in expectations of males and females regarding marriage proposals. It was a cross-sectional study conducted in Karachi. Young people aged between 18 and 45 years were enrolled in the study. An online questionnaire was circulated through a convenience sampling technique. Our sample had 456 participants with n=294 64.5% females. N=387 84.9% were between 18-25 years of age. N=292 64% did not have a preference regarding spouse’s skin tone but n=269 59.0% preferred a taller spouse. Body type was a considerable factor for n=227 49.8%. N=309 67.8% preferred their partner to have a job, own a business and have a career. Love marriage was preferred by n=194 42.5%. Majority of the sample (58.1%) did not have a preference in terms of ethnicity but n=193 42.2% wanted a spouse from the same sect, denomination or caste. N=357 78.3% were against dowry. 52% of the participants said their choices were influenced by societal norms and culture to some extent. Four most important personality traits in a potential spouse were loyalty (75.7%), respect (62.7%), maturity (49.3%) and honesty (46.5%). The findings of this study are reflective of our community and culture as the majority of individuals are under societal influence. Moreover, their preference in traits emphasizes mutual understanding as opposed to physical characteristics. An adequate understanding of an individual's expectations from a marriage proposal decreases the risk of psychological distress associated with the relationship