ASHAD U L L A H QURESHI (original) (raw)
Papers by ASHAD U L L A H QURESHI
Concepts Books Publication, 2017
Glass fibre reinforced polymer composites (GFRP) are being widely used in many applications becau... more Glass fibre reinforced polymer composites (GFRP) are being widely used in many applications because of their light weight, high stiffness and good damping properties. Their use in both offshore and onshore applications is becoming inevitable because of their excellent anti corrosive behaviour. These composites are subjected to severe loading and environmental conditions during their service. The conduct of the composites under certain ecological conditions is to be examined for legitimate working and to stay away from conceivable disappointment of the part. Likewise amid the lifetime of the composite there is a plausibility that the composite might be subjected to various situations than that it is as a rule by and by utilized for. Under every one of these conditions it gets to be distinctly basic that the conduct of the composite be considered for safe outline. Damping is one such property that should be contemplated for evaluating the vibrational conduct of the composites.
In the first part of the work, an attempt is made to study the variation of damping of GFRP composite subjected to different environmental conditions. Three distinctive fluid situations; Seawater, saline water, and ordinary water were utilized for the review to evaluate the damping conduct of the composite. The damping variety of the composite was considered for at regular intervals of submersion in the particular medium up to a most extreme of 60 days utilizing free vibration rot technique. Examples treated with seawater show more damping limit than different examples. The most extreme increment was around 37%. Saline and typical water treated examples indicated decrease in the damping great beneath the untreated examples of the request of around 47% and 32% individually. This differentiating conduct is ascribed to the distinction in the compound structure of the submersion mediums.
Concepts Books Publication, 2017
Earthquakes are natural hazards under which disasters are mainly caused by damage to structures o... more Earthquakes are natural hazards under which disasters are mainly caused by damage to structures or collapse of buildings and other man-made structures. Shaking and ground rupture are the main effects created by earthquakes, principally resulting in more or less severe damage to buildings and other rigid structures. As the earth vibrates, all buildings on the ground surface will respond to that vibration in varying degrees. The horizontal ground motion action is similar to the effect of a horizontal force action on the building.
The seismic vulnerability of masonry buildings is strongly affected by the performance of the shear walls. The shearing strength of masonry mainly depends upon the bond or adhesion at the contact surface between the masonry unit and the mortar. Use of strong mortars, high strength masonry, added reinforcement, improved detailing and the introduction of good anchorage between masonry walls and floors and roofs have enhanced the resistance of masonry to seismic stress. Since shear strength is important for seismic resistance of masonry walls, an attempt has been made to investigate the brick masonry wall with clay brick /fly ash brick having the ratio of 1:6 cement mortar with partial replacement of fine aggregate with fly ash as 0%, 10% and 20% for their compressive strength and shear strength. Horizontal reinforcing of wall is required for imparting strength against plate-action and for tying the perpendicular walls together. When the masonry wall is subjected to lateral loading, the horizontal reinforcement prevents separation of the wall‘s cracked parts at shear failure, therefore improving the shear resistance and energy absorption capacity of the wall. Also, when the wall is adequately reinforced horizontally, many smaller cracks will be evenly distributed over the entire surface of the wall. Experiments have been conducted to understand the shear behavior of the unreinforced and the reinforced masonry wall.
Concepts Books Publication, 2015
Energy storage technologies do not represent energy sources; they provide valuable benefits to im... more Energy storage technologies do not represent energy sources; they provide valuable benefits to improve stability, power quality, and reliability of supply. Battery technologies have improved significantly to meet the challenges of practical electric vehicles and utility applications. Flywheel technologies are now used in advanced nonpolluting uninterruptible power supplies. Advanced capacitors are being considered as energy storage for power quality applications. Superconducting energy storage systems are still in their prototype stages but receiving attention for utility applications. The latest technology developments, some performance analysis, and cost considerations are addressed. This paper concentrates on the performance benefits of adding energy storage to power electronic compensators for utility applications.
Keywords—Battery energy storage, custom power, energy storage system, flexible ac transmission systems (FACTS), flywheel energy storage, high voltage dc transmission (HVDC), hyper capacitor, power electronics, super capacitor.
Concepts Books Publication, 2018
The emerging large datasets have made efficient data processing a much more difficult task for th... more The emerging large datasets have made efficient data processing a much more difficult task for the traditional methodologies. Invariably, datasets continue to increase rapidly in size with time. The purpose of this research is to give an overview of some of the tools and techniques that can be utilized to manage and analyze large datasets. We propose a faster way to catalogue and retrieve data by creating a directory file – more specifically, an improved method that would allow file retrieval based on its time and date. This method eliminates the process of searching the entire content of files and reduces the time it takes to locate the selected data. We also implement the nearest search algorithm in an event where the searched query is not found. The algorithm sorts through data to find the closest points that are within close proximity to the searched query. We also offer an efficient data reduction method that effectively condenses the amount of data. The algorithm enables users to store the desired amount of data in a file and decrease the time in which observations are retrieved for processing. This is achieved by using a reduced standard deviation range to minimize the original data and keeping the dataset to a significant smaller dataset size.
Concepts Books Publication, 2016
Today there is practically no concrete without admixtures or construction chemicals. They are use... more Today there is practically no concrete without admixtures or construction chemicals. They are used in concrete at the time of construction or during maintenance/ repairs to produce several desirable properties. Twenty years ago, construction chemicals were rarely adopted in India, but today there is a great awareness among practicing Engineers, contractors and public about the use of construction chemicals. To suit the demand, in India, a number of companies are emerging in the field of construction chemicals. Plenty of such products are available in the market. But there are no specifications and standards about their usage. In the absence of these norms, the companies advertise their products as Hi-tech and Super stuff. The only literature available is the manufacturers' brochures. Therefore the user finds it very difficult to choose a particular product. A comprehensive study about these chemicals was made in this work to evaluate their performance by conducting a series of laboratory tests.
Several crores of rupees are being spent throughout the world on rehabilitation and restoration of structures. In traditional methods of repairs, the same problems may occur within a short span of time due to
i) Inadequate bonding of new concrete to old concrete or new plaster to old plaster
ii) Corrosion of reinforcement bars not being totally removed. Today, construction chemicals play a vital role in repairs. They provide a long-term solution in the rehabilitation of the distressed members. They bring the damaged members to the original state within a short span. For a particular admixture, there are plenty of market products available in the form of varied chemical bases.
But the field user does not have the knowledge to select a particular product among this plethora of chemicals. This work aims at guiding the user in choosing the correct product. A series of laboratory tests were conducted to assess their performance. Thus, this work is aimed to be of immense use to the CIVIL Engineering profession and the society.
Concepts Books Publication, 2018
Earthquakes, even though they occur rarely, induce inertia forc% which is dynamic and complex. Mo... more Earthquakes, even though they occur rarely, induce inertia forc% which is dynamic and complex. Moreover, they are sometimes so devastating that it is worth going into the depth of understanding them. The current work is one step towards understanding the complex effects of this dynamic force particularly on low rise RC structures which are found in almost all parts of the world. During 2001 Bhuj earthquake of India, a major damage was observed in RC framed structures at Ahemdabad which were in the range of G+3 to G+7 storey. Most of the buildings were having a normal grid of 3m x 3m column spacing with a storey height of 3m. Hence the present work, which is expected to act as a guide line for Civil and Structural Engineers in smaller towns and cities where expert advice may not be easily available, is devoted to RC framed structures ranging from G+3 to G+ 7 storeys.
Out of the various factors affecting the earthquake and dynamic response of RC framed structures, in the current study, the shape of the column is considered to be one of the factors. The G+7 storey frame without the consideration of brick infill is subjected to push over analysis. The performance point for rectangular and equivalent square shaped cross section of columns is studied. The study incorporates two variations in the overall plan dimensions - 6m x 6m and 6m x 9m having four panes each of 3m x 3m and 3m x 4.5m respectively. The same set of models are also studied with brick infill walls modeled as 2D finite elements and equivalent strut. The performance point obtained from the push over analysis is considered as a measure of performance. Parameters like base shear, roof displacement, number of plastic hinges, severity of hinges, effective damping, etc. are compared for the mathematical models at performance point.
Concepts Books Publication, 2018
The Emotion Recognition System recognizes the emotional state of a speaker by testing the emotion... more The Emotion Recognition System recognizes the emotional state of a speaker by testing the emotional patterns in his or her speech. The system determines the speaker’s gender before finding the emotion, which makes the designed system accurate. This technology is one of the best examples of the human-computer interaction system. Using MATLAB, the designed system recognizes a number of emotions such as anger, disgust, boredom, happiness, sadness, and fear. The Emotion Recognition system has two subsystems, named the Gender Recognition (GR) subsystem and the Emotion Recognition (ER) subsystem. The achieved results show that the knowledge of the speaker’s gender helps design a more accurate Emotion Recognition System. The feature selection process is designed to reduce the features of the human speech and select the important features to make the system less complicated. The designed ER system is so flexible that it can be installed in future smartphone technology.
Concepts Books Publication, 2017
Optical fiber communication has emerged as a high potential substitute for communication methods ... more Optical fiber communication has emerged as a high potential substitute for communication methods such as twisted pair and coaxial wire. The main advantage of optical fiber over previous methods is to have higher capacity of data rate transmission. The conventional types of modulation and demodulation technique, which have been used through optical fiber communication system are Wavelength Division Multiplexing (WDM) technique and Dense Wavelength Division Multiplexing (DWDM) technique so far.
In this thesis, the Orthogonal Frequency Division Multiplexing (OFDM) is applied through the modulation and demodulation parts due to some advantages over WDM and DWDM to reach to 100 Gbps data transmission. The main advantage of OFDM-optical fiber is that it only needs one optical source to modulate and one optical source to demodulate the signals at transmitter side and receiver side, which results in a reduction of the cost of the system. Also, by using the OFDM, the chromatic dispersion can be eliminated or decreased.
The first generation of optical fiber communication uses the Wavelength Division Multiplexing (WDM), which has become very popular. In this technique of modulation, optical carriers are modulated at different wavelengths into a single optical fiber, the Long-Haul WDM transmission system. For example, by using a 160 wavelength division multiplexing (WDM) channels of 85.4-Gb/s, the 25.6 Tb/s data are transmitted over 240 Km fiber on a 50-GHz channel spacing. At this study, RZDQPSK system is used with having 50% duty cycle of return to zero formats.
In the study, the Dense Wavelength Division Multiplexing (DWDM) generates 10 Gbps data by injecting −18 𝑑𝐵𝑚 optical power. Also, pulsed seed-light source is used with interferometric noise suppression to increase the performance of system.
In another study, the performance of the DWDM system was analyzed. The 38 𝑑𝐵𝑚 optical power was applied into optical network with the system margin up to 8 dB. By using optical filters, the amount of optical noise was decreased and the total system performance was enhanced.
Keywords: Dense Wavelength Division Multiplexing (DWDM), Wavelength Division Multiplexing (WDM), Orthogonal Frequency Division Multiplexing (OFDM), Interferometric
Concepts Books Publication, 2018
In a world of data deluge, considerable computational power is necessary to derive knowledge from... more In a world of data deluge, considerable computational power is necessary to derive knowledge from the mountains of raw data which surround us. This trend mandates the use of various parallelization techniques and runtimes to perform such analyses in a meaningful period of time.
The information retrieval community has introduced a programming model and associated runtime architecture under the name of MapReduce, and it has demonstrated its applicability to several major operations performed by and within this community. Our initial research demonstrated that, although the applicability of MapReduce is limited to applications with fairly simple parallel topologies, with a careful set of extensions, the programming model can be extended to support more classes of parallel applications; in particular, this holds true for the class of Composable Applications.
This thesis presents our experiences in identifying a set of extensions for the MapReduce programming model, which expands its applicability to more classes of applications, including the iterative MapReduce computations; we have also developed an efficient runtime architecture, named Twister, that supports this new programming model. The thesis also includes a detailed discussion about mapping applications and their algorithms to MapReduce and its extensions, as well as performance analyses of those applications which compare different MapReduce runtimes. The discussions of applications demonstrates the applicability of the Twister runtime for large scale data analyses, while the empirical evaluations prove the scalability and the performance advantages one can gain from using Twister.
Concepts Books Publication, 2018
Resource-intensive Mobile Application (RMA) execution is inhibited by mobile de- vice constrained... more Resource-intensive Mobile Application (RMA) execution is inhibited by mobile de- vice constrained resources, particularly CPU, RAM, storage, and battery. However, Mobile Cloud Computing (MCC) as the state-of-the-art mobile computing paradigm is aiming to augment computing capabilities of mobile devices, mitigate their resource-deficiency, and realize efficient execution of RMA. MCC solutions dominantly perform remote execution of resource-intensive RMAs’ components using resources-rich Distant Immobile Cloud (DIC), particularly public cloud. Although DICs feature high availability and elastic scalability, they are characterized by high communication latency and lack of mobility. Therefore, performance gains of mobile augmentation using DIC are mitigated and RMA execution efficiency is remarkably degraded. In this study, we aim to achieve efficient execution of RMAs by proposing a lightweight MCC framework. We verify the problem significance by analyzing time and energy overheads of exploiting DICs for augmenting resource-constraint mobile devices.
Concepts Books Publication, 2016
The rehabilitation of any structure is necessary, if the potential strength, as on the date, of t... more The rehabilitation of any structure is necessary, if the potential strength, as on the date, of the structural element or the global strength, found less than proposed, thereby reducing the factor of safety. The reduction in factor of safety alarms the danger signal during the event of disaster especially like earthquake.
The ageing of the admixtures of the building components, environmental effects on the materials, repeated excessive or the change in the stresses reduces the strength. The change of use causing undesired change in nature and or of quantity of loading, change made in seismic zone, by national bodies, are the other factors that contribute in reduction of potential strength of the building.
The compliance of potential strength is a cyclic process and in turns the process of rehabilitation. The evaluation of strength, of rehabilitated building, is the process contributed by the materials used, the methodology adapted, the workmanship, and the required rehabilitated strength. In this paper focus, and emphases, placed on explaining efficient, economical, eco-friendly and optimistic use these factors.
Devastative earthquake that rock the Gujarat region, selected to collect the information about the current scenario, in respect of above referred factors and the awareness level among the affected citizens.
The information collected from technical professionals, the implementers, and the end users, by method of literature reviews and on the expert advice. A case study is conducted; that explains the advantage of retrofitted building in the form of higher safety level for users, and extended longevity of the serviceable life of the building. Further, maintaining lower level of carbon emission, and ratable value for the tax calculation of the building.
Key words: -
- Reduction in strength
- Eco-friendly
- Optimum utilization criteria
- The decision-making process
Concepts Books Publication, 2018
Recently, Cloud has become quite attractive because of elasticity, availability, and scalability.... more Recently, Cloud has become quite attractive because of elasticity, availability, and scalability. However, the technologies such as virtualization build up Cloud represents a double-edged sword because of the expansion on attacking surfaces to entire hardware-software stack. Moreover, homogeneous computing in Cloud severely limits the computational power it can potentially provide. Therefore, it is strongly desired to have new and comprehensive solutions to maintain all benefits from Cloud and suppress backsides. This thesis proposes three solutions to address security, computation and data issues in Cloud. Firstly, a GPU MapReduce framework specifically aims at improving performance and reducing energy consumption to data parallel problems.
In addition, the P-CP-ABE scheme overcomes not only the difficulties of data security, access control, and key management issues in Cloud, but also the overall performance is enhanced dramatically.
Finally, the multi-tenancy technology requires a strong network authentication protocols to assure authenticity and non repudiation in the Cloud.
Concepts Books Publication, 2015
Electricity is a quantity, commodity that everyone want from charging a phone to running a factor... more Electricity is a quantity, commodity that everyone want from charging a phone to running a factory the ever growing demand of electricity renewable energy resources are the most important and easy sources of energy yet non-polluting.
Wind energy is the most efficient way of generating electricity. The self-excited induction generator (SEIG) is the best suited isolated generation system due to its simple and robust construction, reduced unit cost and easy maintenance. In the same way. Photo-voltaic power is also another promising energy source. Wind power and PV power are complimentary because strong winds are mostly to occur during night time and cloudy days whereas sunny days are often come with weak winds.
Hence, Wind-Solar hybrid generation system can offer higher reliability to maintain continuous power output than other individual power generation system. The stand alone wind- solar hybrid generation system is valuable to use.
Therefore it is important to study the performance of standalone wind-solar hybrid generation system under steady-state and dynamic condition for the optimum utilization of its meritorious features.
This article is a simple and generalized fuzzy logic based intelligent controller is proposed, which is suitable and for autonomous operation of solar energy conversion or for isolated hybrid energy conversion.
Concepts Books Publication, 2016
The performance of your local area network (LAN) can directly affect your company’s business succ... more The performance of your local area network (LAN) can directly affect your company’s business success. In small and medium businesses alike, employees need quick, reliable access to applications and data to perform their jobs.
A LAN that delivered adequate performance when installed, however, may now be straining. Factors contributing to the need for an upgrade are more users, more powerful PCs and servers, more demanding applications, and the growing role of the intranet.
Sluggish performance impedes productivity and may prevent you from deploying intranet or other networked applications that can improve your competitiveness. Improving LAN Performance: A Step-by-Step Planning is a required for small and medium businesses that want to ensure they’re receiving maximum benefit from their LANs.
This research will explain how to determine if you need an upgrade, describes the two primary options:
(a) Ethernet switch
(b) Fast Ethernet hub
That provides step-by- step planning instructions. To ensure the upgrade planning, and also provides case studies and a worksheet.
Concepts Books Publication, 2018
It has become increasingly more difficult for organizations to hire and retain qualified staff. I... more It has become increasingly more difficult for organizations to hire and retain qualified staff. In order to satisfy this need and meet the competition for talented staff, organizations will be required to develop effective employee attraction and retention strategies. The ability to compete for and retain talented staff will depend in part on the organizations ability to identify this need and successfully develop and implement a plan. Further intensifying this talent acquisition need is the current workforce demographics comprising a large number of baby boomers that are eligible to retire and will be leaving the workforce in the immediate future. Demand for talent will dramatically change the demographics of the workforce. This study identified and examined factors that positively influence the attraction and retention of quality staff for organizations. These factors include employee commitment, trust, communication, and support programs. Additionally, this study examined the practices of the Office of Personnel Management that provides guidance to the federal government agencies on talent acquisition and retention programs to determine the strategies they use to manage this staffing need crisis. This study identifies talent attraction and retention strategies organizations can develop to manage this talent sustainability issue. The findings of this study apply across organizations both public and private.
Keywords: Talented Staff Acquisition, Employee Retention, Employee Commitment, Talent Sustainability, and Employee Turnover.
Concepts Books Publication, 2015
Earthquakes are natural hazards under which disasters are mainly caused by damage to structures o... more Earthquakes are natural hazards under which disasters are mainly caused by damage to structures or collapse of buildings and other man-made structures. Shaking and ground rupture are the main effects created by earthquakes, principally resulting in more or less severe damage to buildings and other rigid structures. As the earth vibrates, all buildings on the ground surface will respond to that vibration in varying degrees. The horizontal ground motion action is similar to the effect of a horizontal force action on the building.
The seismic vulnerability of masonry buildings is strongly affected by the performance of the shear walls. The shearing strength of masonry mainly depends upon the bond or adhesion at the contact surface between the masonry unit and the mortar. Use of strong mortars, high strength masonry, added reinforcement, improved detailing and the introduction of good anchorage between masonry walls and floors and roofs have enhanced the resistance of masonry to seismic stress. Since shear strength is important for seismic resistance of masonry walls, an attempt has been made to investigate the brick masonry wall with clay brick /fly ash brick having the ratio of 1:6 cement mortar with partial replacement of fine aggregate with fly ash as 0%, 10% and 20% for their compressive strength and shear strength. Horizontal reinforcing of wall is required for imparting strength against plate-action and for tying the perpendicular walls together. When the masonry wall is subjected to lateral loading, the horizontal reinforcement prevents separation of the wall‘s cracked parts at shear failure, therefore improving the shear resistance and energy absorption capacity of the wall. Also, when the wall is adequately reinforced horizontally, many smaller cracks will be evenly distributed over the entire surface of the wall. Experiments have been conducted to understand the shear behavior of the unreinforced and the reinforced masonry wall.
Concepts Books Publication, 2018
This specific research article is aimed to compare & conclude which type of road is feasible & is... more This specific research article is aimed to compare & conclude which type of road is feasible & is good to have on a particular situation.
The comparison of the study shows that the white topping of both types of roads improves the life span of the road & its withstanding capability.
In this research paper the comparison of bitumen road & RCC white topping is carried out followed by series of tests to prove the proposed technology.
In this we are considering the road section from Peeli Kothi to Dimple Petrol Pump which is 1.9 km stretched and serves a main connecting road for commercial vehicles.
Finally the proposed technology is proved as a better & feasible option for such roads.
Keywords: Comparison on Bitumen & Asphalt Roads, White topping, Bitumen road etc.
Concepts Books Publication, 2016
The manufacturing systems have been witnessing a key transition from mass manufacturing to lean m... more The manufacturing systems have been witnessing a key transition from mass manufacturing to lean manufacturing. Mass manufacturing focuses on high volume production with limited product variety. Lean manufacturing is focused on elimination of wastes thereby streamlining the processes and facilitating cost reduction.
Lean manufacturing focuses on elimination of seven wastes namely overproduction, over processing, waiting, transportation, defects, inventory and storage. Recently underutilization of creativity of workforce is added as eighth waste and environmental waste, ninth waste. Some of the vital tools of lean manufacturing include Value Stream Mapping (VSM), Kaizen, Total Productive Maintenance (TPM), 5S, Work cells, line balancing etc.
Analysis of implementation of lean tools in an organization like Hindustan Electrode Graphite Ltd. This is famous for its quality export throughout Asia.
VSM is one of the vital tools of lean manufacturing which needs to be implemented first for enabling lean practices. VSM involves construction of current state map, identification of improvement proposals and implementing in future state map.
The main aim of this research dissertation is to simplify the analysis of implementation of lean tool affecting the manufacturing.
Concepts Books Publication, 2018
State Highway Departments and local street and road agencies are currently faced with aging highw... more State Highway Departments and local street and road agencies are currently faced with aging highway systems and a need to extend the life of some of the pavements. The agency engineer should have the opportunity to explore the use of multiple surface types in the selection of a preferred rehabilitation strategy. This study was designed to look at the portland cement concrete overlay alternative and especially the design of overlays for existing composite (portland cement and asphaltic cement concrete) pavements.
Existing design procedures for portland cement concrete overlays deal primarily with an existing asphaltic concrete pavement with an underlying granular base or stabilized base. This study reviewed those design methods and moved to the development of a design for overlays of composite pavements. It deals directly with existing portland cement concrete pavements that have been overlaid with successive asphaltic concrete overlays and are in need of another overlay due to poor performance of the existing surface.
The results of this study provide the engineer with a way to use existing deflection technology coupled with materials testing and a combination of existing overlay design methods to determine the design thickness of the portland cement concrete overlay. The design methodology provides guidance for the engineer, from the evaluation of the existing pavement condition through the construction of the overlay. It also provides a structural analysis of various joint and widening patterns on the performance of such designs. This work provides the engineer with a portland cement concrete overlay solution to composite pavements or conventional asphaltic concrete pavements that are in need of surface rehabilitation.
Keywords: Asphaltic Concrete Overlays, Pavement Performance, Portland Cement Concrete Overlays, Rehabilitation
Concepts Books Publication, 2018
Vibration based damage detection in bridges is examined with the objective of defining a relation... more Vibration based damage detection in bridges is examined with the objective of defining a relationship between substructure stiffness degradation and frequency and mode shape modulation induced by damage. The relationship is explored through finite element modeling of primarily an experimental representation of a three-span concrete bridge structure located at the entrance to the main campus of The University of Mississippi in Oxford.
Equivalent beam and 3D finite element models are created of an experimental setup incorporating levels of damage simulated using deck slab bearing pads of varying stiffness.
Eigenvalue analysis is performed to examine the change of frequencies for characteristic deck slab deformation modes for each case of simulated damage. Results for each damage case are compared to a reference one with no bearing pads. The variation of frequency with vertical stiffness at mid span is then developed to quantify the sensitivity of the change of frequency to the change of stiffness over a broad range of values.
Supplemental studies are performed including time history analysis of an impulsive forced vibration of each experimental bridge model to estimate motion levels for characteristic deck responses at mid span. A typical pier of the campus bridge is also modeled at full scale dimensions using frame elements. The three-span deck system is then modeled with a lumped spring system incorporating the effective stiffness of the piers, and the effect on the vertical deck frequencies is established. Distributed substructure damage is studied using this modeling approach by considering a uniform reduction in concrete modulus for the pier elements as might occur during long term environmental exposure. Damage is applied to a single pier as well as both piers to examine the effect of asymmetry.
Concepts Books Publication, 2017
Glass fibre reinforced polymer composites (GFRP) are being widely used in many applications becau... more Glass fibre reinforced polymer composites (GFRP) are being widely used in many applications because of their light weight, high stiffness and good damping properties. Their use in both offshore and onshore applications is becoming inevitable because of their excellent anti corrosive behaviour. These composites are subjected to severe loading and environmental conditions during their service. The conduct of the composites under certain ecological conditions is to be examined for legitimate working and to stay away from conceivable disappointment of the part. Likewise amid the lifetime of the composite there is a plausibility that the composite might be subjected to various situations than that it is as a rule by and by utilized for. Under every one of these conditions it gets to be distinctly basic that the conduct of the composite be considered for safe outline. Damping is one such property that should be contemplated for evaluating the vibrational conduct of the composites.
In the first part of the work, an attempt is made to study the variation of damping of GFRP composite subjected to different environmental conditions. Three distinctive fluid situations; Seawater, saline water, and ordinary water were utilized for the review to evaluate the damping conduct of the composite. The damping variety of the composite was considered for at regular intervals of submersion in the particular medium up to a most extreme of 60 days utilizing free vibration rot technique. Examples treated with seawater show more damping limit than different examples. The most extreme increment was around 37%. Saline and typical water treated examples indicated decrease in the damping great beneath the untreated examples of the request of around 47% and 32% individually. This differentiating conduct is ascribed to the distinction in the compound structure of the submersion mediums.
Concepts Books Publication, 2017
Earthquakes are natural hazards under which disasters are mainly caused by damage to structures o... more Earthquakes are natural hazards under which disasters are mainly caused by damage to structures or collapse of buildings and other man-made structures. Shaking and ground rupture are the main effects created by earthquakes, principally resulting in more or less severe damage to buildings and other rigid structures. As the earth vibrates, all buildings on the ground surface will respond to that vibration in varying degrees. The horizontal ground motion action is similar to the effect of a horizontal force action on the building.
The seismic vulnerability of masonry buildings is strongly affected by the performance of the shear walls. The shearing strength of masonry mainly depends upon the bond or adhesion at the contact surface between the masonry unit and the mortar. Use of strong mortars, high strength masonry, added reinforcement, improved detailing and the introduction of good anchorage between masonry walls and floors and roofs have enhanced the resistance of masonry to seismic stress. Since shear strength is important for seismic resistance of masonry walls, an attempt has been made to investigate the brick masonry wall with clay brick /fly ash brick having the ratio of 1:6 cement mortar with partial replacement of fine aggregate with fly ash as 0%, 10% and 20% for their compressive strength and shear strength. Horizontal reinforcing of wall is required for imparting strength against plate-action and for tying the perpendicular walls together. When the masonry wall is subjected to lateral loading, the horizontal reinforcement prevents separation of the wall‘s cracked parts at shear failure, therefore improving the shear resistance and energy absorption capacity of the wall. Also, when the wall is adequately reinforced horizontally, many smaller cracks will be evenly distributed over the entire surface of the wall. Experiments have been conducted to understand the shear behavior of the unreinforced and the reinforced masonry wall.
Concepts Books Publication, 2015
Energy storage technologies do not represent energy sources; they provide valuable benefits to im... more Energy storage technologies do not represent energy sources; they provide valuable benefits to improve stability, power quality, and reliability of supply. Battery technologies have improved significantly to meet the challenges of practical electric vehicles and utility applications. Flywheel technologies are now used in advanced nonpolluting uninterruptible power supplies. Advanced capacitors are being considered as energy storage for power quality applications. Superconducting energy storage systems are still in their prototype stages but receiving attention for utility applications. The latest technology developments, some performance analysis, and cost considerations are addressed. This paper concentrates on the performance benefits of adding energy storage to power electronic compensators for utility applications.
Keywords—Battery energy storage, custom power, energy storage system, flexible ac transmission systems (FACTS), flywheel energy storage, high voltage dc transmission (HVDC), hyper capacitor, power electronics, super capacitor.
Concepts Books Publication, 2018
The emerging large datasets have made efficient data processing a much more difficult task for th... more The emerging large datasets have made efficient data processing a much more difficult task for the traditional methodologies. Invariably, datasets continue to increase rapidly in size with time. The purpose of this research is to give an overview of some of the tools and techniques that can be utilized to manage and analyze large datasets. We propose a faster way to catalogue and retrieve data by creating a directory file – more specifically, an improved method that would allow file retrieval based on its time and date. This method eliminates the process of searching the entire content of files and reduces the time it takes to locate the selected data. We also implement the nearest search algorithm in an event where the searched query is not found. The algorithm sorts through data to find the closest points that are within close proximity to the searched query. We also offer an efficient data reduction method that effectively condenses the amount of data. The algorithm enables users to store the desired amount of data in a file and decrease the time in which observations are retrieved for processing. This is achieved by using a reduced standard deviation range to minimize the original data and keeping the dataset to a significant smaller dataset size.
Concepts Books Publication, 2016
Today there is practically no concrete without admixtures or construction chemicals. They are use... more Today there is practically no concrete without admixtures or construction chemicals. They are used in concrete at the time of construction or during maintenance/ repairs to produce several desirable properties. Twenty years ago, construction chemicals were rarely adopted in India, but today there is a great awareness among practicing Engineers, contractors and public about the use of construction chemicals. To suit the demand, in India, a number of companies are emerging in the field of construction chemicals. Plenty of such products are available in the market. But there are no specifications and standards about their usage. In the absence of these norms, the companies advertise their products as Hi-tech and Super stuff. The only literature available is the manufacturers' brochures. Therefore the user finds it very difficult to choose a particular product. A comprehensive study about these chemicals was made in this work to evaluate their performance by conducting a series of laboratory tests.
Several crores of rupees are being spent throughout the world on rehabilitation and restoration of structures. In traditional methods of repairs, the same problems may occur within a short span of time due to
i) Inadequate bonding of new concrete to old concrete or new plaster to old plaster
ii) Corrosion of reinforcement bars not being totally removed. Today, construction chemicals play a vital role in repairs. They provide a long-term solution in the rehabilitation of the distressed members. They bring the damaged members to the original state within a short span. For a particular admixture, there are plenty of market products available in the form of varied chemical bases.
But the field user does not have the knowledge to select a particular product among this plethora of chemicals. This work aims at guiding the user in choosing the correct product. A series of laboratory tests were conducted to assess their performance. Thus, this work is aimed to be of immense use to the CIVIL Engineering profession and the society.
Concepts Books Publication, 2018
Earthquakes, even though they occur rarely, induce inertia forc% which is dynamic and complex. Mo... more Earthquakes, even though they occur rarely, induce inertia forc% which is dynamic and complex. Moreover, they are sometimes so devastating that it is worth going into the depth of understanding them. The current work is one step towards understanding the complex effects of this dynamic force particularly on low rise RC structures which are found in almost all parts of the world. During 2001 Bhuj earthquake of India, a major damage was observed in RC framed structures at Ahemdabad which were in the range of G+3 to G+7 storey. Most of the buildings were having a normal grid of 3m x 3m column spacing with a storey height of 3m. Hence the present work, which is expected to act as a guide line for Civil and Structural Engineers in smaller towns and cities where expert advice may not be easily available, is devoted to RC framed structures ranging from G+3 to G+ 7 storeys.
Out of the various factors affecting the earthquake and dynamic response of RC framed structures, in the current study, the shape of the column is considered to be one of the factors. The G+7 storey frame without the consideration of brick infill is subjected to push over analysis. The performance point for rectangular and equivalent square shaped cross section of columns is studied. The study incorporates two variations in the overall plan dimensions - 6m x 6m and 6m x 9m having four panes each of 3m x 3m and 3m x 4.5m respectively. The same set of models are also studied with brick infill walls modeled as 2D finite elements and equivalent strut. The performance point obtained from the push over analysis is considered as a measure of performance. Parameters like base shear, roof displacement, number of plastic hinges, severity of hinges, effective damping, etc. are compared for the mathematical models at performance point.
Concepts Books Publication, 2018
The Emotion Recognition System recognizes the emotional state of a speaker by testing the emotion... more The Emotion Recognition System recognizes the emotional state of a speaker by testing the emotional patterns in his or her speech. The system determines the speaker’s gender before finding the emotion, which makes the designed system accurate. This technology is one of the best examples of the human-computer interaction system. Using MATLAB, the designed system recognizes a number of emotions such as anger, disgust, boredom, happiness, sadness, and fear. The Emotion Recognition system has two subsystems, named the Gender Recognition (GR) subsystem and the Emotion Recognition (ER) subsystem. The achieved results show that the knowledge of the speaker’s gender helps design a more accurate Emotion Recognition System. The feature selection process is designed to reduce the features of the human speech and select the important features to make the system less complicated. The designed ER system is so flexible that it can be installed in future smartphone technology.
Concepts Books Publication, 2017
Optical fiber communication has emerged as a high potential substitute for communication methods ... more Optical fiber communication has emerged as a high potential substitute for communication methods such as twisted pair and coaxial wire. The main advantage of optical fiber over previous methods is to have higher capacity of data rate transmission. The conventional types of modulation and demodulation technique, which have been used through optical fiber communication system are Wavelength Division Multiplexing (WDM) technique and Dense Wavelength Division Multiplexing (DWDM) technique so far.
In this thesis, the Orthogonal Frequency Division Multiplexing (OFDM) is applied through the modulation and demodulation parts due to some advantages over WDM and DWDM to reach to 100 Gbps data transmission. The main advantage of OFDM-optical fiber is that it only needs one optical source to modulate and one optical source to demodulate the signals at transmitter side and receiver side, which results in a reduction of the cost of the system. Also, by using the OFDM, the chromatic dispersion can be eliminated or decreased.
The first generation of optical fiber communication uses the Wavelength Division Multiplexing (WDM), which has become very popular. In this technique of modulation, optical carriers are modulated at different wavelengths into a single optical fiber, the Long-Haul WDM transmission system. For example, by using a 160 wavelength division multiplexing (WDM) channels of 85.4-Gb/s, the 25.6 Tb/s data are transmitted over 240 Km fiber on a 50-GHz channel spacing. At this study, RZDQPSK system is used with having 50% duty cycle of return to zero formats.
In the study, the Dense Wavelength Division Multiplexing (DWDM) generates 10 Gbps data by injecting −18 𝑑𝐵𝑚 optical power. Also, pulsed seed-light source is used with interferometric noise suppression to increase the performance of system.
In another study, the performance of the DWDM system was analyzed. The 38 𝑑𝐵𝑚 optical power was applied into optical network with the system margin up to 8 dB. By using optical filters, the amount of optical noise was decreased and the total system performance was enhanced.
Keywords: Dense Wavelength Division Multiplexing (DWDM), Wavelength Division Multiplexing (WDM), Orthogonal Frequency Division Multiplexing (OFDM), Interferometric
Concepts Books Publication, 2018
In a world of data deluge, considerable computational power is necessary to derive knowledge from... more In a world of data deluge, considerable computational power is necessary to derive knowledge from the mountains of raw data which surround us. This trend mandates the use of various parallelization techniques and runtimes to perform such analyses in a meaningful period of time.
The information retrieval community has introduced a programming model and associated runtime architecture under the name of MapReduce, and it has demonstrated its applicability to several major operations performed by and within this community. Our initial research demonstrated that, although the applicability of MapReduce is limited to applications with fairly simple parallel topologies, with a careful set of extensions, the programming model can be extended to support more classes of parallel applications; in particular, this holds true for the class of Composable Applications.
This thesis presents our experiences in identifying a set of extensions for the MapReduce programming model, which expands its applicability to more classes of applications, including the iterative MapReduce computations; we have also developed an efficient runtime architecture, named Twister, that supports this new programming model. The thesis also includes a detailed discussion about mapping applications and their algorithms to MapReduce and its extensions, as well as performance analyses of those applications which compare different MapReduce runtimes. The discussions of applications demonstrates the applicability of the Twister runtime for large scale data analyses, while the empirical evaluations prove the scalability and the performance advantages one can gain from using Twister.
Concepts Books Publication, 2018
Resource-intensive Mobile Application (RMA) execution is inhibited by mobile de- vice constrained... more Resource-intensive Mobile Application (RMA) execution is inhibited by mobile de- vice constrained resources, particularly CPU, RAM, storage, and battery. However, Mobile Cloud Computing (MCC) as the state-of-the-art mobile computing paradigm is aiming to augment computing capabilities of mobile devices, mitigate their resource-deficiency, and realize efficient execution of RMA. MCC solutions dominantly perform remote execution of resource-intensive RMAs’ components using resources-rich Distant Immobile Cloud (DIC), particularly public cloud. Although DICs feature high availability and elastic scalability, they are characterized by high communication latency and lack of mobility. Therefore, performance gains of mobile augmentation using DIC are mitigated and RMA execution efficiency is remarkably degraded. In this study, we aim to achieve efficient execution of RMAs by proposing a lightweight MCC framework. We verify the problem significance by analyzing time and energy overheads of exploiting DICs for augmenting resource-constraint mobile devices.
Concepts Books Publication, 2016
The rehabilitation of any structure is necessary, if the potential strength, as on the date, of t... more The rehabilitation of any structure is necessary, if the potential strength, as on the date, of the structural element or the global strength, found less than proposed, thereby reducing the factor of safety. The reduction in factor of safety alarms the danger signal during the event of disaster especially like earthquake.
The ageing of the admixtures of the building components, environmental effects on the materials, repeated excessive or the change in the stresses reduces the strength. The change of use causing undesired change in nature and or of quantity of loading, change made in seismic zone, by national bodies, are the other factors that contribute in reduction of potential strength of the building.
The compliance of potential strength is a cyclic process and in turns the process of rehabilitation. The evaluation of strength, of rehabilitated building, is the process contributed by the materials used, the methodology adapted, the workmanship, and the required rehabilitated strength. In this paper focus, and emphases, placed on explaining efficient, economical, eco-friendly and optimistic use these factors.
Devastative earthquake that rock the Gujarat region, selected to collect the information about the current scenario, in respect of above referred factors and the awareness level among the affected citizens.
The information collected from technical professionals, the implementers, and the end users, by method of literature reviews and on the expert advice. A case study is conducted; that explains the advantage of retrofitted building in the form of higher safety level for users, and extended longevity of the serviceable life of the building. Further, maintaining lower level of carbon emission, and ratable value for the tax calculation of the building.
Key words: -
- Reduction in strength
- Eco-friendly
- Optimum utilization criteria
- The decision-making process
Concepts Books Publication, 2018
Recently, Cloud has become quite attractive because of elasticity, availability, and scalability.... more Recently, Cloud has become quite attractive because of elasticity, availability, and scalability. However, the technologies such as virtualization build up Cloud represents a double-edged sword because of the expansion on attacking surfaces to entire hardware-software stack. Moreover, homogeneous computing in Cloud severely limits the computational power it can potentially provide. Therefore, it is strongly desired to have new and comprehensive solutions to maintain all benefits from Cloud and suppress backsides. This thesis proposes three solutions to address security, computation and data issues in Cloud. Firstly, a GPU MapReduce framework specifically aims at improving performance and reducing energy consumption to data parallel problems.
In addition, the P-CP-ABE scheme overcomes not only the difficulties of data security, access control, and key management issues in Cloud, but also the overall performance is enhanced dramatically.
Finally, the multi-tenancy technology requires a strong network authentication protocols to assure authenticity and non repudiation in the Cloud.
Concepts Books Publication, 2015
Electricity is a quantity, commodity that everyone want from charging a phone to running a factor... more Electricity is a quantity, commodity that everyone want from charging a phone to running a factory the ever growing demand of electricity renewable energy resources are the most important and easy sources of energy yet non-polluting.
Wind energy is the most efficient way of generating electricity. The self-excited induction generator (SEIG) is the best suited isolated generation system due to its simple and robust construction, reduced unit cost and easy maintenance. In the same way. Photo-voltaic power is also another promising energy source. Wind power and PV power are complimentary because strong winds are mostly to occur during night time and cloudy days whereas sunny days are often come with weak winds.
Hence, Wind-Solar hybrid generation system can offer higher reliability to maintain continuous power output than other individual power generation system. The stand alone wind- solar hybrid generation system is valuable to use.
Therefore it is important to study the performance of standalone wind-solar hybrid generation system under steady-state and dynamic condition for the optimum utilization of its meritorious features.
This article is a simple and generalized fuzzy logic based intelligent controller is proposed, which is suitable and for autonomous operation of solar energy conversion or for isolated hybrid energy conversion.
Concepts Books Publication, 2016
The performance of your local area network (LAN) can directly affect your company’s business succ... more The performance of your local area network (LAN) can directly affect your company’s business success. In small and medium businesses alike, employees need quick, reliable access to applications and data to perform their jobs.
A LAN that delivered adequate performance when installed, however, may now be straining. Factors contributing to the need for an upgrade are more users, more powerful PCs and servers, more demanding applications, and the growing role of the intranet.
Sluggish performance impedes productivity and may prevent you from deploying intranet or other networked applications that can improve your competitiveness. Improving LAN Performance: A Step-by-Step Planning is a required for small and medium businesses that want to ensure they’re receiving maximum benefit from their LANs.
This research will explain how to determine if you need an upgrade, describes the two primary options:
(a) Ethernet switch
(b) Fast Ethernet hub
That provides step-by- step planning instructions. To ensure the upgrade planning, and also provides case studies and a worksheet.
Concepts Books Publication, 2018
It has become increasingly more difficult for organizations to hire and retain qualified staff. I... more It has become increasingly more difficult for organizations to hire and retain qualified staff. In order to satisfy this need and meet the competition for talented staff, organizations will be required to develop effective employee attraction and retention strategies. The ability to compete for and retain talented staff will depend in part on the organizations ability to identify this need and successfully develop and implement a plan. Further intensifying this talent acquisition need is the current workforce demographics comprising a large number of baby boomers that are eligible to retire and will be leaving the workforce in the immediate future. Demand for talent will dramatically change the demographics of the workforce. This study identified and examined factors that positively influence the attraction and retention of quality staff for organizations. These factors include employee commitment, trust, communication, and support programs. Additionally, this study examined the practices of the Office of Personnel Management that provides guidance to the federal government agencies on talent acquisition and retention programs to determine the strategies they use to manage this staffing need crisis. This study identifies talent attraction and retention strategies organizations can develop to manage this talent sustainability issue. The findings of this study apply across organizations both public and private.
Keywords: Talented Staff Acquisition, Employee Retention, Employee Commitment, Talent Sustainability, and Employee Turnover.
Concepts Books Publication, 2015
Earthquakes are natural hazards under which disasters are mainly caused by damage to structures o... more Earthquakes are natural hazards under which disasters are mainly caused by damage to structures or collapse of buildings and other man-made structures. Shaking and ground rupture are the main effects created by earthquakes, principally resulting in more or less severe damage to buildings and other rigid structures. As the earth vibrates, all buildings on the ground surface will respond to that vibration in varying degrees. The horizontal ground motion action is similar to the effect of a horizontal force action on the building.
The seismic vulnerability of masonry buildings is strongly affected by the performance of the shear walls. The shearing strength of masonry mainly depends upon the bond or adhesion at the contact surface between the masonry unit and the mortar. Use of strong mortars, high strength masonry, added reinforcement, improved detailing and the introduction of good anchorage between masonry walls and floors and roofs have enhanced the resistance of masonry to seismic stress. Since shear strength is important for seismic resistance of masonry walls, an attempt has been made to investigate the brick masonry wall with clay brick /fly ash brick having the ratio of 1:6 cement mortar with partial replacement of fine aggregate with fly ash as 0%, 10% and 20% for their compressive strength and shear strength. Horizontal reinforcing of wall is required for imparting strength against plate-action and for tying the perpendicular walls together. When the masonry wall is subjected to lateral loading, the horizontal reinforcement prevents separation of the wall‘s cracked parts at shear failure, therefore improving the shear resistance and energy absorption capacity of the wall. Also, when the wall is adequately reinforced horizontally, many smaller cracks will be evenly distributed over the entire surface of the wall. Experiments have been conducted to understand the shear behavior of the unreinforced and the reinforced masonry wall.
Concepts Books Publication, 2018
This specific research article is aimed to compare & conclude which type of road is feasible & is... more This specific research article is aimed to compare & conclude which type of road is feasible & is good to have on a particular situation.
The comparison of the study shows that the white topping of both types of roads improves the life span of the road & its withstanding capability.
In this research paper the comparison of bitumen road & RCC white topping is carried out followed by series of tests to prove the proposed technology.
In this we are considering the road section from Peeli Kothi to Dimple Petrol Pump which is 1.9 km stretched and serves a main connecting road for commercial vehicles.
Finally the proposed technology is proved as a better & feasible option for such roads.
Keywords: Comparison on Bitumen & Asphalt Roads, White topping, Bitumen road etc.
Concepts Books Publication, 2016
The manufacturing systems have been witnessing a key transition from mass manufacturing to lean m... more The manufacturing systems have been witnessing a key transition from mass manufacturing to lean manufacturing. Mass manufacturing focuses on high volume production with limited product variety. Lean manufacturing is focused on elimination of wastes thereby streamlining the processes and facilitating cost reduction.
Lean manufacturing focuses on elimination of seven wastes namely overproduction, over processing, waiting, transportation, defects, inventory and storage. Recently underutilization of creativity of workforce is added as eighth waste and environmental waste, ninth waste. Some of the vital tools of lean manufacturing include Value Stream Mapping (VSM), Kaizen, Total Productive Maintenance (TPM), 5S, Work cells, line balancing etc.
Analysis of implementation of lean tools in an organization like Hindustan Electrode Graphite Ltd. This is famous for its quality export throughout Asia.
VSM is one of the vital tools of lean manufacturing which needs to be implemented first for enabling lean practices. VSM involves construction of current state map, identification of improvement proposals and implementing in future state map.
The main aim of this research dissertation is to simplify the analysis of implementation of lean tool affecting the manufacturing.
Concepts Books Publication, 2018
State Highway Departments and local street and road agencies are currently faced with aging highw... more State Highway Departments and local street and road agencies are currently faced with aging highway systems and a need to extend the life of some of the pavements. The agency engineer should have the opportunity to explore the use of multiple surface types in the selection of a preferred rehabilitation strategy. This study was designed to look at the portland cement concrete overlay alternative and especially the design of overlays for existing composite (portland cement and asphaltic cement concrete) pavements.
Existing design procedures for portland cement concrete overlays deal primarily with an existing asphaltic concrete pavement with an underlying granular base or stabilized base. This study reviewed those design methods and moved to the development of a design for overlays of composite pavements. It deals directly with existing portland cement concrete pavements that have been overlaid with successive asphaltic concrete overlays and are in need of another overlay due to poor performance of the existing surface.
The results of this study provide the engineer with a way to use existing deflection technology coupled with materials testing and a combination of existing overlay design methods to determine the design thickness of the portland cement concrete overlay. The design methodology provides guidance for the engineer, from the evaluation of the existing pavement condition through the construction of the overlay. It also provides a structural analysis of various joint and widening patterns on the performance of such designs. This work provides the engineer with a portland cement concrete overlay solution to composite pavements or conventional asphaltic concrete pavements that are in need of surface rehabilitation.
Keywords: Asphaltic Concrete Overlays, Pavement Performance, Portland Cement Concrete Overlays, Rehabilitation
Concepts Books Publication, 2018
Vibration based damage detection in bridges is examined with the objective of defining a relation... more Vibration based damage detection in bridges is examined with the objective of defining a relationship between substructure stiffness degradation and frequency and mode shape modulation induced by damage. The relationship is explored through finite element modeling of primarily an experimental representation of a three-span concrete bridge structure located at the entrance to the main campus of The University of Mississippi in Oxford.
Equivalent beam and 3D finite element models are created of an experimental setup incorporating levels of damage simulated using deck slab bearing pads of varying stiffness.
Eigenvalue analysis is performed to examine the change of frequencies for characteristic deck slab deformation modes for each case of simulated damage. Results for each damage case are compared to a reference one with no bearing pads. The variation of frequency with vertical stiffness at mid span is then developed to quantify the sensitivity of the change of frequency to the change of stiffness over a broad range of values.
Supplemental studies are performed including time history analysis of an impulsive forced vibration of each experimental bridge model to estimate motion levels for characteristic deck responses at mid span. A typical pier of the campus bridge is also modeled at full scale dimensions using frame elements. The three-span deck system is then modeled with a lumped spring system incorporating the effective stiffness of the piers, and the effect on the vertical deck frequencies is established. Distributed substructure damage is studied using this modeling approach by considering a uniform reduction in concrete modulus for the pier elements as might occur during long term environmental exposure. Damage is applied to a single pier as well as both piers to examine the effect of asymmetry.