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Congestion Detection for QoS-enabled Wireless Networks and its Potential Applications
Ramneek,Patrick Hosein,최원준,석우진 한국통신학회 2016 Journal of communications and networks Vol.18 No.3
We propose a mechanism for monitoring load in qualityof service (QoS)-enabled wireless networks and show how it can beused for network management as well as for dynamic pricing. Mobilenetwork traffic, especially video, has grown exponentially overthe last few years and it is anticipated that this trend will continueinto the future. Driving factors include the availability of new affordable,smart devices, such as smart-phones and tablets, togetherwith the expectation of high quality user experience for video asone would obtain at home. Although new technologies such as longterm evolution (LTE) are expected to help satisfy this demand, thefact is that several other mechanisms will be needed to manageoverload and congestion in the network. Therefore, the efficientmanagement of the expected huge data traffic demands is critical ifoperators are to maintain acceptable service quality while makinga profit. In the current work, we address this issue by first investigatinghow the network load can be accurately monitored and thenwe show how this load metric can then be used to provide creativepricing plans. In addition, we describe its applications to featureslike traffic offloading and user satisfaction tracking.
Design and Implementation of a QoS-Based Scheduling Algorithm Based on the LTE QCI Specifications
( Ramneek ),( Wonjun Choi ),( Woojin Seok ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.2
LTE 3GPP standard defines several QCI (QoS Class Identifier) classes to provide differential QoS, depending on the requirements of different user applications.These QCI values have been characterized in terms of priority, packet loss and delay budget. In spite of the availability of this robust QoS framework in LTE, there is no such scheduling algorithm that has its working principle based on this framework. The responsibility of fulfilling the user requirements, while satisfying the service class requirements is left upon the cellular service provider and it is an open issue at present. To solve this problem, we have proposed a MAC scheduler, which defines the priority of different users based on their bearer specification and provides desired QoS in terms of the achieved throughput through the resource block allocation based on calculated user priority.
Incorporation of inorganic nanoparticles into an organic polymer matrix for data storage application
Ramneek Kaur,Janpreet Singh,S.K. Tripathi 한국물리학회 2017 Current Applied Physics Vol.17 No.5
The demand of polymer nanocomposite based energy storage devices is in ever increasing stage. Present work demonstrates the application of hybrid polymer nanocomposite (CdSe nanoparticles embedded in poly(N-vinyl carbazole) (PVK) matrix) for data storage devices. CdSe/PVK nanocomposite has been successfully synthesized by ex-situ chemical method. From X-Ray diffraction analysis, Zinc blende structure of CdSe nanoparticles with (111), (220) and (311) cubic crystal planes has been observed. TEM micrograph of CdSe/PVK nanocomposite shows the spherical CdSe nanoparticles having average particle size 6e7 nm, homogeneously dispersed in PVK matrix. CdSe/PVK nanocomposite shows photoluminescence due to the CdSe nanoparticles and p-PVK conformation of PVK. The average surface roughness of the nanocomposite film calculated by using AFM analysis is 45.12 nm. Two-terminal conductivity switching device, structured Al/(CdSe/PVK)/Ag, has been fabricated and characterized. Conductivity switching is due to electron trapping and tunnelling in CdSe nanoparticles and through PVK matrix, respectively. Write-read-erase cycles show a good stability of the device with ON/OFF ratio ~104. Obtained results reveal the application of CdSe/PVK nanocomposite in data storage devices.
차승준,전승협,람 닉,김진미,정연정,정성인,Cha, S.J.,Jeon, S.H.,Ramneek, Ramneek,Kim, J.M.,Jeong, Y.J.,Jung, S.I. 한국전자통신연구원 2018 전자통신동향분석 Vol.33 No.6
As recent applications are requiring more CPUs for their performance, manycore systems have evolved. Since existing operating systems do not provide performance scalability in manycore systems, Azalea, a multi-kernel based system, has been developed for supporting performance scalability. Unikernel is a new operating system technology starting with the concept of a library OS. Applying unikernel to Azalea enables an improvement in performance. In this paper, we first analyze the current technology trends of unikernel, and then discuss the applications and effects of unikernel to Azalea. Azalea-unikernel was built in a single image consisting of libOS, runtime libraries, and an application, and executed with the desired number of cores and memory size in bare-metal. In particular, it supports source and binary compatibility such that existing linux binaries can be rebuilt and executed in Azalea-unikernel, and already built binaries can be run immediately without modification with a better performance. It not only achieves a performance enhancement, it is also a more secure OS for manycore systems.
Sequence Analysis of E2 Glycoprotein from Indian Isolate of Classical Swine Fever Virus (CSFV)
( Mehak Bajwa ),( Ramneek Verma ),( Dipak Deka ),( Gagandeep Singh Dhol ),( Nagendra Nath Barman ) 한국미생물생명공학회(구 한국산업미생물학회) 2015 한국미생물·생명공학회지 Vol.43 No.1
CSF is a major concern for the swine industry, representing currently the most epizootically dangerous disease to the species. Numerous CSFV isolates with various degrees of virulence have already been isolated worldwide, ranging from low virulent strains that do not result in any apparent clinical signs to highly virulent strains that cause a severe per acute hemorrhagic fever with very high mortality. The molecular epidemiology of CSFVs has proven to be an essential tool for effective disease control and the development of safe and effective vaccines. Therefore, this study cloned and sequenced local CSFV isolates, and conducted a phylogenetic analysis based on the E2 glycoprotein encoding sequences.The RNA was extracted from PK15 cell culture passaged CSFV isolates, the cDNA prepared, and the complete E2 gene amplified with a product size of 1186 bp. The gelpurified PCR product was cloned into a pGEMT easy vector and the positive clone commercially sequenced. Aligning the nucleotide (1119 bp) and amino acid (373) sequences with 29 reference strains revealed nucleotide and amino acid sequence identities of 82.60-97.80% and 88.70-98.70%, respectively, indicating a higher mutation rate of the field CSFV strains. The phylogenetic analysis based on the complete E2 amino acid sequences also revealed a reliable differentiation of all the analyzed strains into specific genetic groups and subgroups, plus the local isolate (CSFV-E2) was found to cluster with the CSFV subgroup 2.2. Thus, the full-length E2 cds proved to be most suitable for a reliable and statistically significant phylogenetic analysis of CSFV isolates.
Sequence Analysis of E2 Glycoprotein from Indian Isolate of Classical Swine Fever Virus (CSFV)
Bajwa, Mehak,Verma, Ramneek,Deka, Dipak,Dhol, Gagandeep Singh,Barman, Nagendra Nath The Korean Society for Microbiology and Biotechnol 2015 한국미생물·생명공학회지 Vol.43 No.1
CSF is a major concern for the swine industry, representing currently the most epizootically dangerous disease to the species. Numerous CSFV isolates with various degrees of virulence have already been isolated worldwide, ranging from low virulent strains that do not result in any apparent clinical signs to highly virulent strains that cause a severe per acute hemorrhagic fever with very high mortality. The molecular epidemiology of CSFVs has proven to be an essential tool for effective disease control and the development of safe and effective vaccines. Therefore, this study cloned and sequenced local CSFV isolates, and conducted a phylogenetic analysis based on the E2 glycoprotein encoding sequences.The RNA was extracted from PK15 cell culture passaged CSFV isolates, the cDNA prepared, and the complete E2 gene amplified with a product size of 1186 bp. The gelpurified PCR product was cloned into a pGEMT easy vector and the positive clone commercially sequenced. Aligning the nucleotide (1119 bp) and amino acid (373) sequences with 29 reference strains revealed nucleotide and amino acid sequence identities of 82.60-97.80% and 88.70-98.70%, respectively, indicating a higher mutation rate of the field CSFV strains. The phylogenetic analysis based on the complete E2 amino acid sequences also revealed a reliable differentiation of all the analyzed strains into specific genetic groups and subgroups, plus the local isolate (CSFV-E2) was found to cluster with the CSFV subgroup 2.2. Thus, the full-length E2 cds proved to be most suitable for a reliable and statistically significant phylogenetic analysis of CSFV isolates.