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Analysis of Evaporative Cooler and Tube in Tube Heat Exchanger in Intercooling Of Gas Turbine
Adharsh S ; Akhil George Kurian; Aswin Zachariah; G Rahul Krishna; Bibin Varkey
Mechanical Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 355 - 362
In this project a study is conducted by using an evaporative cooler and a tube in tube heat exchanger for intercooling. In an evaporative cooler the water absorbs heat from the stream of the flowing air in order to change its phase and then evaporate, thus providing a net cooling effect to the incoming stream of compressed air. A typical tube in tube heat exchanger may be used to reduce the temperature of the flowing stream of gases. In our study we calculated the reduction in work done by the compressor for a particular flow rate of air through the system for both evaporative cooler and tube in tube heat exchanger. Calculations were made for different flow rates of cooling water and corresponding graphs were plotted.
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Natural Image Based Visual Secret Sharing Using (k, n) Shares
Veena K Suresh ; Sarath V Sankaran ; Ambikadevi Amma T
Computer Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 363 - 368
Visual cryptography (VC) is a technique that divides a secret image into n shares, that are distributed to the concerned participants and to decrypt, the shares are stacked to get the secret image back. The shares can cause transmission risks and management issues, hence a Natural-image-based Visual Secret Sharing scheme (NVSS scheme) is being used. NVSS scheme can share one digital secret image over n-1 arbitrary selected natural images (called natural shares) which are diverse, and one noise-like share. The noise-like share is generated based on these natural shares and the secret image. The existing system used the (n, n) NVSS scheme, such that if at least a share out of n shares is lost or missing then the secret image cannot be retrieved forever. The proposing system uses (k, n) Visual Secret Sharing by using natural images in which at least k out of n active shares can provide access to the secret image. Hence the secret image can be retrieved if at least k out of n shares which includes the generated noise-like share is present for decryption. The proposing scheme hence provide security to the secret image and also uses unaltered images as shares in a VSS scheme to reduce transmission risks.
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SECURING NETWORK AGAINST POLLUTION ATTACK USING TAGGING SCHEME
VYSAGH M ; REEJA R RAJAN; AMBIKADEVI AMMA T
Computer Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 369 - 373
Networks are always under the threat of attacks and one such kind of an attack happens to be pollution attack. Network coding is applied to improve the performance of network where the intermediate nodes encode data packet and then forwards it. Presence of malicious node creates injection of fake data packets into the network which along with the original packet gets encoded. This makes the network polluted which circulates within the network quickly and leads to wastage of network resource like bandwidth. Such a type of attack is known as pollution attack. To counter measure to this attack a tagging scheme is introduced which is known as Key Pre-distribution based Tag Encoding scheme (KEPTE) with an extended security.
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Waste Management
Churi Bhagyesh P. ; More Ashok W.; Mhatre Ashish J.
Mechanical Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 374 - 376
The reason of using Conveyer or any other type of separation of waste on a machine is to perform work. Rapid increase in population, has led to improper waste management in metropolitan cities resulting in increased pests and spreading of diseases. Littering of paper and plastic waste has led to unclean environment. Not separating waste and dumping all together under will make the soil degrade its value and the plastic is the main cause of all types of pollution, if not treated correctly will remain on soil for lakhs of years and chemicals from them will only subdue the land So here we came up with a novel idea of separating all types of solid waste which are found in every household. Here we have made a kiln which will sort each waste at its level and then it can be collected for further treatment in the plant. The whole system is mechanical where step by step processes are carried out. And last waste gets separated and our aim of waste management is fulfilled. Through this project, we hope it will help humanity, somehow somewhere in the world which will give us a deep sense of satisfaction.
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A Review on Optimization of Process Parameters for Material Removal Rate and Surface Roughness for SS 202 Material During Face Milling Operation
Vikas Dhiman ; Deepak Gupta
Mechanical Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 377 - 381
In the last few years the development of new materials show deep growth but the major problem is it’s machining. So it is necessary adopt new machining methods. CNC (Computer Numerical Control) milling machine is one of the common machine tools in machine industry. Face milling is very common method for finishing of new materials and machined materials. The determination of optimal process parameters such as spindle speed, tool feed and depth of cut are one of the vital parameters. All experiment conduct on CNC face milling machine on SS202 material. During the face milling process, the material is removed by the face mill cutter. The effects of various parameters of face milling process like spindle speed, depth of cut, feed rate have been investigated to reveal their Impact on Material Removal Rate and surface roughness using Taguchi Methodology. The experiments are conducted by using Taguchi L9 orthogonal array as suggested by Taguchi. Signal-to-Noise (S/N) ratio and Analysis of Variance (ANOVA) is employed to analyses the effect of milling parameters on material removal rate and surface roughness. Experimental plan is performed by a Standard Orthogonal Array. The results of analysis of variance (ANOVA) indicate that the proposed mathematical model can be adequately describing the performance within the limit of factors being studied and various plots were generated by using MINITAB software.
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A Copyright Information Embedding System
VINU KRISHNAN R ; Vishnu Sasidharan; Akhil Appukuttan; Sreeresmi T.S
Computer Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 382 - 386
In recent years, Camera Smart phone has become a popular consumer electronics product. Young people like to use that to record their daily lives, moreover, they will share these photos and information to others. However, the photos may be used without consent after they are uploaded to Internet. To avoid this problem, one can embed visible and invisible watermarks into images. However, an additional process for embedding watermarks should be performed before an image is uploaded. When the number of photos is large, the process for embedding watermarks will bother the user. Thus, we propose a copyright embedding system; pre-specified copyright information is automatically embedded into pictures with digital watermark technology when these pictures are taken. In addition, original images (i.e., images without watermarks) can be preserved selectively. Therefore, this system is very suitable for the protection of the photographs taken by Android phones to prevent piratical behaviours.
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Clustering based face recognition from videos
CHINJU POULOSE ; Anu T P; Ambikadevi Amma T
Computer Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 387 - 391
Face recognition algorithms plays an important role in the field of personal identification. During the past several years video based face recognition has received significant attention. A video based face recognition algorithm usually computes a discriminative video signature as an ordered list of still face images from a large dictionary. In this proposed system discriminative video signature is generated from the combination of information present in each video frame. It facilitates in the identification of an individual as it embeds the information in the form of a ranked list of images under identical intra-personal settings from the dictionary. A combined approach, including clustering, re-ranking and fusion, is proposed for optimizing ranked lists across multiple video frames and fusing them into a single composite ordered list to compute the video signature. In clustering, each ranked list corresponding to a video frame is partitioned into different clusters and reliability of each cluster is calculated. Then the similarity scores of images within a cluster are adjusted based on the reliability of that cluster. During fusion, multiple ranked lists of a video are fused based on the adjusted similarity scores of images to generate a composite ranked list as the video signature. For matching two videos, their composite ranked lists obtained after clustering based re-ranking and fusion are compared. The discounted cumulative gain (DCG) measure is used to compare two ranked lists, which uses the ranking of images in the video signature as well as the usefulness of images in characterizing the individual in a video. The proposed video based face recognition algorithm efficiently computes the video signature and transforms the problem of video based face recognition into matching two ranked list.
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Exhaust Gas Waste Heat Recovery And Utilization System In IC Engine
ALVIN P KOSHY ; BIJOY K JOSE; JEFFIN EASO JOHNSON; K NAVANEETH KRISHNAN; BIJEESH P
Mechanical Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 392 - 400
Most of the heat energy released from the fuel of an internal combustion engine is wasted to the environment. This is a serious issue in this world of depleting fuels. So an effort is made to recover the heat wasted from the exhaust gas of an internal combustion engine. If the heat wasted out through the exhaust gas is utilised, we can improve the efficiency of the engine to some extent. There are a lot of research works in the field of waste heat recovery systems. Many succeeded in their own methodologies. We hereby attempt to recover the waste heat from the exhaust gas and use the heat energy recovered to improve the efficiency of the internal combustion engine. For the same we studied the exhaust gas temperature of a four stroke diesel engine at various RPM. The exhaust gas temperature at 4000 RPM has got the maximum temperature. So a recovery system for a constant RPM of 4000 is designed. The recovery system consists of a shell and tube heat exchanger and a uniflow steam engine which is coupled to the main engine. The coupled steam engine improves the efficiency of the main engine by lowering the frictional power at the power stroke and idle stroke of the main engine. The initial cost of the system is high due to the additional recovery system. But in the long run the system proves to be profitable.
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SELECTIVE DETAIL ENHANCED FUSION WITH PHOTOCROPPING
ROOPA TEENA JOHNSON ; MANU G THOMAS; AMBIKADEVIAMMA T
Computer Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 401 - 405
The display of a natural scene which exhibits high dynamic range (HDR) on a conventional low dynamic range (LDR) display is normally a challenging task. To solve this problem multiple differently exposed images are captured and fused together into a detailed image. In this paper, a ghost removal algorithm is performed to convert non-consistent pixels into consistent pixels and the corrected image is fused using a selectively detail enhanced exposure fusion algorithm. Thus a detail enhanced images is produced as a result. To this detail enhanced image a photocropping technique uses an unsupervised fuzzy clustering algorithm which converts the image into atomic regions. A manifold embedding algorithm is used for image-level semantics and image global configurations with graphlets or a small-sized connected subgraph. Bayesian network (BN) makes the photo into the framework derived from the multi-channel post-embedding graphlets of the image data. The cropping parameters are calculated by Gibbs sampling method and finally, the enhanced cropped image will be obtained.
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Experimental Investigation of Performance and Emission Characteristics of Hybrid Fuel Engine
Blessen Sam Edison ; Christy Binu; Godwin Geo Sabu; Jobin K Abey ; Nirmal Chandran
Mechanical Engineering
Year: 2015, Volume:1, Issue : 11
Pages: 406 - 412
Together with the growing economy in different parts of the world, there is an increasing demand for energy, thus relying on fossil fuels. As there are problems arising due to global warming and environmental degradation related with usage of fossil fuels, demand for alternative fuels is always high. Hydrogen being a green additive fuel is a potential renewable fuel for internal combustion engines, gas turbines, fuel cells etc. It has the advantage of ultra-low pollutions and high efficiency for these applications. The project consist of an on board hydrogen unit along with 4-stroke air cooled engine. The hydrogen produced in the unit was naturally aspirated to a petrol engine through intake of carburetor to substitute the total fuel energy at four engine loads at the engine speed of 750 rpm. The engine performance characteristics and emissions were experimentally investigated and various graphs were plotted to study the effects of these factors at four engine loads. The results obtained showed that the engine with addition of hydrogen had an efficiency of 21.3%. The combined effect of water injection decreased the former efficiency by 4.3%. The net efficiency of the entire setup including hydrogen and water injection was 17%.
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Abstract
