CHETAN VERMA - Academia.edu (original) (raw)

Papers by CHETAN VERMA

2017 7th International Conference on Communication Systems and Network Technologies (CSNT), 2017

A wireless local area network (WLAN) is a digital transmission system designed to provide locatio... more A wireless local area network (WLAN) is a digital transmission system designed to provide location independent network access between computing devices by using radio waves in a limited area. Mainly IEEE 802.11 standards are used to provide wireless connectivity at higher speeds. To analyze and check the continuous feasibility of WLAN signal, Vector Signal Transceiver-VST 5644R can be the efficient approach. In this paper the experimental investigation and analysis of WLAN 802.11 standard has been carried out based on vector signal transceiver VST 5644R using different modulation schemes. It was analyzed that QPSK gives best link performance for the WLAN link. The results are being analyzed in terms of EVM (Error vector magnitude). The link has been evaluated at 2.4GHz using QPSK and QAM modulation schemes. This work is based on experimental and real time implementation of WLAN Link based on PXIe 1062Q VST 5644 platform.

Proceedings of the 23rd International Conference on World Wide Web, 2014

We present a data-driven approach for the construction of ontological graphs on a set of image ta... more We present a data-driven approach for the construction of ontological graphs on a set of image tags obtained from annotated image corpus. We treat each tag as a node in a graph, and starting with a preliminary graph obtained using WordNet, we propose the graph construction as a refinement of the preliminary graph using corpus statistics. Towards this, we formulate an optimization problem which is solved using a local search based approach. To evaluate the constructed ontological graphs, we propose a novel task which involves associating test images with tags while observing partial set of associated tags.

IEEE Access, 2016

Enterprise knowledge workers have been overwhelmed by the growing rate of incoming data in recent... more Enterprise knowledge workers have been overwhelmed by the growing rate of incoming data in recent years. In this paper, we present a recommendation system with the goal of helping knowledge workers in discovering useful new content. In particular, our system builds personalized user models based on file activities on enterprise network file servers. Our models use novel features that are derived from file metadata and user collaboration. Through extensive evaluation on real-world enterprise data, we demonstrate the effectiveness of our system with high precision and recall values. Unfortunately, our experiments reveal that per-user models are unable to handle heavy workloads. To address this limitation, we propose a novel optimization technique, active feature-based model selection, that predicts the user models that should be applied on each test file. Such a technique can reduce the classification time per file by as much as 23 times without sacrificing accuracy. We also show how this technique can be extended to improve the scalability exponentially at marginal cost of prediction accuracy, e.g., we can gain 169 times faster performance on an average across all shares by sacrificing 4% of F-score.

2015 Global Conference on Communication Technologies (GCCT), 2015

LTE is acronym for “Long Term Evolution” used as a new technology that suggests intensifications ... more LTE is acronym for “Long Term Evolution” used as a new technology that suggests intensifications to prevailing mobile technologies. LTE is 4G (4th Generation) technology that focuses to afford excelling features of service as compare to other technology. LTE is extensively called the competent and adversary technology to WiMAX because of its wireless nature and mobile services. LTE is one of the most interesting fields of research due to its higher data rate, low latency, high spectral efficiency and improved Quality of Service (QoS) even for the cell edge users. In this paper, the main objective is to investigate a downlink and uplink physical layer performance of Long Term Evolution system based on LTE Release 10. The performance of LTE system is analyzed using Real time simulation with the help of sophisticated and accurate hardware from national instruments based PXIe-1062 vector signal transceiver 5644. The performance of LTE is analyzed at 3MHz, 5MHz, 10MHz, 15MHz. In this study, the performance LTE of downlink and uplink transmission is investigated depending on different scenarios for the physical layer.

Research Journal of Pharmacy and Technology, 2015

Research Journal of Pharmacy and Technology, 2015

Nanomedicine is the medical application of nanotechnology. Nanomedicine is defined as the monitor... more Nanomedicine is the medical application of nanotechnology. Nanomedicine is defined as the monitoring, repair, construction and control of human biological systems at the molecular level, using engineered nanodevices and nanostructures. Nanomedicine ranges from the medical applications of nanomaterials to nanoelectronic biosensors and even possible future applications of molecular nanotechnology. The aim of nanomedicine is the improvement of healthcare for the benefit of the patient. Nanomedicine is an important and rapidly growing field, which is emerging from the on of these application of nanotechnology to healthcare. The generally recognized categories include diagnostics, imaging, medical devices, drug discovery, drug delivery and regenerative medicine. Nanomedicine can offer impressive resolutions for various life threatening diseases. Disease areas which can be expected to benefit most from nanotechnology within the next few years are cancer, diseases of the cardiovascular system, the lungs, blood, neurological (especially neurodegenerative) diseases, diabetes, inflammatory/infectious diseases, Parkinson's or Alzheimer's disease and orthopaedic problem.

Research Journal of Pharmacy and Technology, 2015

Pressurized liquid extraction (PLE) is a process that pools temperature and pressure with liquid ... more Pressurized liquid extraction (PLE) is a process that pools temperature and pressure with liquid solvents to accomplish rapid and efficient extraction of analytes from several matrices. PLE is a more recent extraction technique proposed to obtain bioactive compounds. It uses less solvent, in a shorter period of time, is automated, and involves retaining the sample in an oxygen and light-free environment in contrast to traditional organic solvent extraction. PLE is based on the use of conventional solvent set controlled temperatures and pressures and has been well established for extraction of valuable compounds from natural sources. A major benefit of PLE above conventional solvent extraction methods conducted at atmospheric pressure is that pressurized solvents remain in the liquid state, even above their normal atmospheric pressure boiling points allowing hightemperature. PLE is used for the extraction of many compounds in vegetal oil as lipids and fatty acids owing to its short time extraction. It also can be used in the extraction of minor components, such as anthocyanins, carotenoids, phenols, sterols, phospholipids, tocopherols, free fatty acids, and glycerides, because these compounds may be degraded during long extractions at higher temperatures. In the present study we have highlighted the recent findings associated with the PLE.

Research Journal of Pharmacy and Technology, 2015

This study investigate the use of ultrasound assisted extraction (UAE), the present work describe... more This study investigate the use of ultrasound assisted extraction (UAE), the present work describes the application of ultrasound to improves the extraction efficiency of the classical solvent extraction techniques such as maceration and soxhelt extraction to extract various bioactive compound from natural source like plant and animals. In this review extraction of various compounds i.e.β carotene, flavonoids, anthraquinones, isoflavones, cepharanthine, melanin, ursolic acid, from various plants i.e. morinda citrifolia, mitragyna speciosa, oscimum sanctum, polygonum cuspidatum, auricularia auricula, stephania rotunda lour, iris tectorum maxim, heterophyllaea pustulata hook, hawthorn seed, spirulina platensisand their therapeutic acivities like antiinflammatory, anti-cancer, anti-oxidant, cardioprotective action, immunomodulatory, anti-diabetic, antirheumatic, anti-bacterial, anthelmintic, anti-depressant, hepatoprotective, radioprotective properties was extracted at different temperature 25o, 45o, 90°C, power setting 3, 6, 9 types of solvent used like ethanol methanol, acetone, acetonitrile in different composition and time 15, 30, 45, 60, 90 minute. The effect of various factors such as extraction solvent, solvent concentration, temperature, solvent to solid ratio, ultrasound power, extraction time, and particle size, on the yield of target components were investigated. Under the optimum conditions the extraction process is carried out and the yield obtained with UAE has been compared with batch and soxhelt extraction the result indicated that UAE was an alternative method for extraction. UAE is based upon acoustic cavitation. Cavitation produces physical effects such as liquid circulation currents and turbulence which results in significant increase in the mass transfer rates and thus increased extraction yield. To achieve the same recovery as that achieved by UAE, soxhelt extraction and maceration extraction required much longer time.

2013 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT), 2013

Personalization applications such as content recommendations, product recommendations and adverti... more Personalization applications such as content recommendations, product recommendations and advertisements, and social network related recommendations, can be quite beneficial for both service providers and users. Such applications need to understand user preferences in order to provide customized services. As user engagement with web videos has grown significantly, understanding user preferences based on videos viewed looks promising. The above requires ability to classify web videos into a set of categories appropriate for the personalization application. However, such categories may be substantially different from common categories like Sports, Music, Comedy, etc. used by video sharing websites, leading to lack of labeled training videos for such categories. In this paper, we study the feasibility and effectiveness of a fully automated framework to obtain training videos to enable classification of web videos to any arbitrary set of categories, as desired by the personalization application. We investigate the desired properties in training data that can lead to high performance of the trained classification models. We then develop an approach to identify and score keywords based on their suitability to retrieve training videos, with the desired properties, for the specified set of categories. Experimental results on several sets of categories demonstrate the ability of the proposed approach to obtain effective training data, and hence achieve high video classification performance.

2014 IEEE 16th Electronics Packaging Technology Conference (EPTC), 2014

In conventional wire bonded packages, design rules require that individual bond wires not touch e... more In conventional wire bonded packages, design rules require that individual bond wires not touch each other. Also, handling of bonded units may cause wire disturbance leading to wire short. Insulated wire bonding techniques eliminate this requirement by coating a non conductive layer over the bond wires as shown in Fig.1 and thus, electrical isolation is maintained even after wires physically touch each other [1-2]. The focus of this paper is to leverage the insulated wire-bonding technology for die design implementation efficiency in terms of improving electrical parameters and die size reduction. Two specific implementation are discussed in this paper. One is to implement off-chip decoupling capacitor and use it to replace on-die capacitors required for signal integrity and save precious silicon area. Second implementation is about realizing mesh type power grid to improve the IR drop and simultaneously get rid of multiple Power/Ground pads and thus, save silicon area.

2017 7th International Conference on Communication Systems and Network Technologies (CSNT), 2017

A wireless local area network (WLAN) is a digital transmission system designed to provide locatio... more A wireless local area network (WLAN) is a digital transmission system designed to provide location independent network access between computing devices by using radio waves in a limited area. Mainly IEEE 802.11 standards are used to provide wireless connectivity at higher speeds. To analyze and check the continuous feasibility of WLAN signal, Vector Signal Transceiver-VST 5644R can be the efficient approach. In this paper the experimental investigation and analysis of WLAN 802.11 standard has been carried out based on vector signal transceiver VST 5644R using different modulation schemes. It was analyzed that QPSK gives best link performance for the WLAN link. The results are being analyzed in terms of EVM (Error vector magnitude). The link has been evaluated at 2.4GHz using QPSK and QAM modulation schemes. This work is based on experimental and real time implementation of WLAN Link based on PXIe 1062Q VST 5644 platform.

Proceedings of the 23rd International Conference on World Wide Web, 2014

We present a data-driven approach for the construction of ontological graphs on a set of image ta... more We present a data-driven approach for the construction of ontological graphs on a set of image tags obtained from annotated image corpus. We treat each tag as a node in a graph, and starting with a preliminary graph obtained using WordNet, we propose the graph construction as a refinement of the preliminary graph using corpus statistics. Towards this, we formulate an optimization problem which is solved using a local search based approach. To evaluate the constructed ontological graphs, we propose a novel task which involves associating test images with tags while observing partial set of associated tags.

IEEE Access, 2016

Enterprise knowledge workers have been overwhelmed by the growing rate of incoming data in recent... more Enterprise knowledge workers have been overwhelmed by the growing rate of incoming data in recent years. In this paper, we present a recommendation system with the goal of helping knowledge workers in discovering useful new content. In particular, our system builds personalized user models based on file activities on enterprise network file servers. Our models use novel features that are derived from file metadata and user collaboration. Through extensive evaluation on real-world enterprise data, we demonstrate the effectiveness of our system with high precision and recall values. Unfortunately, our experiments reveal that per-user models are unable to handle heavy workloads. To address this limitation, we propose a novel optimization technique, active feature-based model selection, that predicts the user models that should be applied on each test file. Such a technique can reduce the classification time per file by as much as 23 times without sacrificing accuracy. We also show how this technique can be extended to improve the scalability exponentially at marginal cost of prediction accuracy, e.g., we can gain 169 times faster performance on an average across all shares by sacrificing 4% of F-score.

2015 Global Conference on Communication Technologies (GCCT), 2015

LTE is acronym for “Long Term Evolution” used as a new technology that suggests intensifications ... more LTE is acronym for “Long Term Evolution” used as a new technology that suggests intensifications to prevailing mobile technologies. LTE is 4G (4th Generation) technology that focuses to afford excelling features of service as compare to other technology. LTE is extensively called the competent and adversary technology to WiMAX because of its wireless nature and mobile services. LTE is one of the most interesting fields of research due to its higher data rate, low latency, high spectral efficiency and improved Quality of Service (QoS) even for the cell edge users. In this paper, the main objective is to investigate a downlink and uplink physical layer performance of Long Term Evolution system based on LTE Release 10. The performance of LTE system is analyzed using Real time simulation with the help of sophisticated and accurate hardware from national instruments based PXIe-1062 vector signal transceiver 5644. The performance of LTE is analyzed at 3MHz, 5MHz, 10MHz, 15MHz. In this study, the performance LTE of downlink and uplink transmission is investigated depending on different scenarios for the physical layer.

Research Journal of Pharmacy and Technology, 2015

Research Journal of Pharmacy and Technology, 2015

Nanomedicine is the medical application of nanotechnology. Nanomedicine is defined as the monitor... more Nanomedicine is the medical application of nanotechnology. Nanomedicine is defined as the monitoring, repair, construction and control of human biological systems at the molecular level, using engineered nanodevices and nanostructures. Nanomedicine ranges from the medical applications of nanomaterials to nanoelectronic biosensors and even possible future applications of molecular nanotechnology. The aim of nanomedicine is the improvement of healthcare for the benefit of the patient. Nanomedicine is an important and rapidly growing field, which is emerging from the on of these application of nanotechnology to healthcare. The generally recognized categories include diagnostics, imaging, medical devices, drug discovery, drug delivery and regenerative medicine. Nanomedicine can offer impressive resolutions for various life threatening diseases. Disease areas which can be expected to benefit most from nanotechnology within the next few years are cancer, diseases of the cardiovascular system, the lungs, blood, neurological (especially neurodegenerative) diseases, diabetes, inflammatory/infectious diseases, Parkinson's or Alzheimer's disease and orthopaedic problem.

Research Journal of Pharmacy and Technology, 2015

Pressurized liquid extraction (PLE) is a process that pools temperature and pressure with liquid ... more Pressurized liquid extraction (PLE) is a process that pools temperature and pressure with liquid solvents to accomplish rapid and efficient extraction of analytes from several matrices. PLE is a more recent extraction technique proposed to obtain bioactive compounds. It uses less solvent, in a shorter period of time, is automated, and involves retaining the sample in an oxygen and light-free environment in contrast to traditional organic solvent extraction. PLE is based on the use of conventional solvent set controlled temperatures and pressures and has been well established for extraction of valuable compounds from natural sources. A major benefit of PLE above conventional solvent extraction methods conducted at atmospheric pressure is that pressurized solvents remain in the liquid state, even above their normal atmospheric pressure boiling points allowing hightemperature. PLE is used for the extraction of many compounds in vegetal oil as lipids and fatty acids owing to its short time extraction. It also can be used in the extraction of minor components, such as anthocyanins, carotenoids, phenols, sterols, phospholipids, tocopherols, free fatty acids, and glycerides, because these compounds may be degraded during long extractions at higher temperatures. In the present study we have highlighted the recent findings associated with the PLE.

Research Journal of Pharmacy and Technology, 2015

This study investigate the use of ultrasound assisted extraction (UAE), the present work describe... more This study investigate the use of ultrasound assisted extraction (UAE), the present work describes the application of ultrasound to improves the extraction efficiency of the classical solvent extraction techniques such as maceration and soxhelt extraction to extract various bioactive compound from natural source like plant and animals. In this review extraction of various compounds i.e.β carotene, flavonoids, anthraquinones, isoflavones, cepharanthine, melanin, ursolic acid, from various plants i.e. morinda citrifolia, mitragyna speciosa, oscimum sanctum, polygonum cuspidatum, auricularia auricula, stephania rotunda lour, iris tectorum maxim, heterophyllaea pustulata hook, hawthorn seed, spirulina platensisand their therapeutic acivities like antiinflammatory, anti-cancer, anti-oxidant, cardioprotective action, immunomodulatory, anti-diabetic, antirheumatic, anti-bacterial, anthelmintic, anti-depressant, hepatoprotective, radioprotective properties was extracted at different temperature 25o, 45o, 90°C, power setting 3, 6, 9 types of solvent used like ethanol methanol, acetone, acetonitrile in different composition and time 15, 30, 45, 60, 90 minute. The effect of various factors such as extraction solvent, solvent concentration, temperature, solvent to solid ratio, ultrasound power, extraction time, and particle size, on the yield of target components were investigated. Under the optimum conditions the extraction process is carried out and the yield obtained with UAE has been compared with batch and soxhelt extraction the result indicated that UAE was an alternative method for extraction. UAE is based upon acoustic cavitation. Cavitation produces physical effects such as liquid circulation currents and turbulence which results in significant increase in the mass transfer rates and thus increased extraction yield. To achieve the same recovery as that achieved by UAE, soxhelt extraction and maceration extraction required much longer time.

2013 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT), 2013

Personalization applications such as content recommendations, product recommendations and adverti... more Personalization applications such as content recommendations, product recommendations and advertisements, and social network related recommendations, can be quite beneficial for both service providers and users. Such applications need to understand user preferences in order to provide customized services. As user engagement with web videos has grown significantly, understanding user preferences based on videos viewed looks promising. The above requires ability to classify web videos into a set of categories appropriate for the personalization application. However, such categories may be substantially different from common categories like Sports, Music, Comedy, etc. used by video sharing websites, leading to lack of labeled training videos for such categories. In this paper, we study the feasibility and effectiveness of a fully automated framework to obtain training videos to enable classification of web videos to any arbitrary set of categories, as desired by the personalization application. We investigate the desired properties in training data that can lead to high performance of the trained classification models. We then develop an approach to identify and score keywords based on their suitability to retrieve training videos, with the desired properties, for the specified set of categories. Experimental results on several sets of categories demonstrate the ability of the proposed approach to obtain effective training data, and hence achieve high video classification performance.

2014 IEEE 16th Electronics Packaging Technology Conference (EPTC), 2014

In conventional wire bonded packages, design rules require that individual bond wires not touch e... more In conventional wire bonded packages, design rules require that individual bond wires not touch each other. Also, handling of bonded units may cause wire disturbance leading to wire short. Insulated wire bonding techniques eliminate this requirement by coating a non conductive layer over the bond wires as shown in Fig.1 and thus, electrical isolation is maintained even after wires physically touch each other [1-2]. The focus of this paper is to leverage the insulated wire-bonding technology for die design implementation efficiency in terms of improving electrical parameters and die size reduction. Two specific implementation are discussed in this paper. One is to implement off-chip decoupling capacitor and use it to replace on-die capacitors required for signal integrity and save precious silicon area. Second implementation is about realizing mesh type power grid to improve the IR drop and simultaneously get rid of multiple Power/Ground pads and thus, save silicon area.