Authors -  M. Srilakshmi, M. Raja Raja Cholan

Abstract :  Several new smartphones are released every year. Many people upgrade to new phones, and their old phones are not put to any further use. In this paper, we explore the feasibility of using such retired smartphones and their on-board sensors to build a home security system. We observe that door-related events such as opening and closing have unique vibration signatures when compared to many types of environmental vibrational noise. These events can be captured by the accelerometer of a smartphone when the phone is mounted on a wall near a door. The rotation of a door can also be captured by the magnetometer of a smartphone when the phone is mounted on a door. We design machine learning and threshold-based methods to detect door opening events based on accelerometer and magnetometer data and build a prototype home security system that can detect door openings and notify the homeowner via email, SMS and phone calls upon break-in detection. To further augment our security system, we explore using the Smartphone’s built-in microphone to detect door and window openings across multiple doors and windows simultaneously. Experiments in a residential home show that the accelerometer- based detection can detect door open events with accuracy higher than 98%, and magnetometer-based detection has 100% accuracy. By using the magnetometer method to automate the training phase of a neural network, we find that sound-based detection of door openings has an accuracy of 90% across multiple doors.
Keywords : Smartphone, IOT, sensors, MEMS

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Authors -  Usha Nandini. D, Dr. R. Maruthi

Abstract :  The In the last decade, the benefit of on-line payment has opened several new opportunities for e-commerce, lowering the geographical boundaries for retail. While e-commerce continues to be gaining quality, it's additionally the playground of fraudsters UN agency try to misuse the transparency of on-line purchases and also the transfer of master-card records. . We introduce GOTCHA!, a new approach on how to define and extract features from a time-weighted network, and how to exploit and integrate network-based and intrinsic features in fraud detection. The combination of all features (i.e., intrinsic and network features) is fed to the machine learning algorithms. This is the Gotcha! Model. As the creation of network features drastically increases the number of features to learn from, ensemble methods like Random Forest are used to train the models.

Keywords : OTB, FD, Gotcha, DOT NET.

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Authors -  Dr.M.Rajaram Narayanan

Abstract :  Based on primary data as yield obtained from present research work and with the help of questionnaire through personal interview from farmers, cost benefit analysis on field experiment for Chilli crop was carried out. The present research aimed to analyze the cost and return of Chilli vegetable using organic and chemical fertilizer treatments. Experimental study area is one hector with five treatments where T5 was kept as control and four others treatment were T1-Vermicompost @ 3.5 t/ha, T2-NADEP compost @ 6.25 t/ha, T3-pit compost @ 6.25 t/ha, and T4-chemical fertilizer (300:150:150- N: P2O5: K2O kg/ha). Yield of Chilli was harvested after 90th day. The per hectare cost of cultivation of Chilli crop was Rs 2,25,138 which gives gross reruns of Rs 2,81,350 with the application of vermicompost treatment (T1). The per hectare cost of cultivation of Chilli crop was Rs 1,74,928 which gives gross reruns of Rs 2,11,840 with the application of NADEP compost treatment (T2).  The per hectare cost of cultivation of Chilli crop was Rs 1,70,239 which gives gross reruns of Rs 2,54,870 with the application of pit compost treatment (T3).  The per hectare cost of cultivation of Chilli crop was Rs 1,50,536 which gives gross reruns of Rs  2,99,721 with the application of chemical fertilizer treatment (T4). The per hectare cost of cultivation of Chilli crop was Rs 1,37,501 which gives gross reruns of Rs 1,83,705 in control treatment (T5). It was found that Chilli crop found more profitable with application of chemical fertilizer treatment (with yield - 9055 kg/ha) followed by pit compost (with yield - 7700 kg/ha), control (with yield - 5550 kg/ha), vermicompost treatment (with yield - 8,500 kg/ha) and NADEP compost treatment (with yield - 6400 kg/ha) respectively. The input output ratios were about 1.24, 1.21, 1.49, 1.99 and 1.33 in the treatment T1, T2, T3, T4 and T5 respectively. The higher B: C ratios (1.99) clearly indicated that cultivation of Chilli crop with chemical fertilizer treatment was found to be profitable as compared to remaining fertilizer treatment. The analysis of the data revealed that, the B/C ratio was more (1:1.99) with higher yield (9055 kg/ha) with application of chemical fertilizer treatment to the Chilli crop followed by pit compost treatment with B/C ratio 1:1.33. Lowest profit came out (Rs 36,912) in NADEP compost treatment with B/C ratio 1:21. Chilli crop was most profitable with application of chemical fertilizer treatment followed by pit compost treatment.

Keywords : Chemical Fertilizer, Chilli crop, NADEP

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Authors -  Mangesh. M. Vedpathak, Balbhim, L. Chavan

Abstract :  Polylactic acid (PLA) is an organic polymer commonly used in fused deposition (FDM) printing and biomedical scaffolding that is biocompatible and immunologically inert. However, variations in source material quality and chemistry make it necessary to characterize the filament and determine potential changes in chemistry occurring as a result of the FDM process. We used several spectroscopic techniques, including laser confocal microscopy, Fourier transform infrared (FTIR) spectroscopy and photoacousitc FTIR spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) in order to characterize both the bulk and surface chemistry of the source material and printed samples. Scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) were used to characterize morphology, cold crystallinity, and the glass transition and melting temperatures following printing. Analysis revealed calcium carbonate-based additives which were reacted with organic ligands and potentially trace metal impurities, both before and following printing. These additives became concentrated in voids in the printed structure. This finding is important for biomedical applications as carbonate will impact subsequent cell growth on printed tissue scaffolds. Results of chemical analysis also provided evidence of the hygroscopic nature of the source material and oxidation of the printed surface, and SEM imaging revealed micro- and submicron-scale roughness that will also impact potential applications.

Keywords : Polylactic acid (PLA), FTIR spectroscopy, Raman spectroscopy

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Authors -  Dr.P.K.Prakasha

Abstract :  his paper aims at reducing the THD (Total Harmonic Distortion) in the sine wave of the transmission system.  These harmonics occurs in the power wave due to external disturbances and noise which affect the system.  In order to reduce these harmonics a component called asymmetric cascaded H-bridge multilevel inverter is introduced in place of a normal inverter which converts DC power to AC power in high voltage long transmission system.  This paper deals with a MATLAB simulation to calculate the overall percentage of THD obtained when a 15 level DC source cascaded MLI is used.  Also a comparison between the THD of DC sourced cascaded 7 level inverter and a DC sourced 15 level is done to prove that 15 level inverter is better in reducing harmonics than a seven level inverter.  A new method of using asymmetric hybrid sources instead of asymmetric DC sources is also proposed.  So, a MATLAM simulation is also done for a 15 level Hybrid Cascaded H-bridge multilevel inverter to calculate the THD and a comparison is made between the THD of a hybrid cascaded 15 level multilevel inverter and a DC sourced cascaded 15 level multilevel inverters to see if there are any changes in the THD using hybrid sources.  Since, the overall aim is to totally eliminate the THD in the power system, these are some measures proposed to eliminate them.  Though complete elimination of harmonics in the power system is not possible now, in future as technology and awareness increases THD could be possibly reduced to zero.

Keywords : Cascaded H-Bridge(CHB), Multilevel Inverter (MLI), Pulse Width Modulation (PWM), Total Harmonic Distortion(THD),  Peripheral Interface Controller (PIC), Renewable Energy Sources (RES)

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Abstract :  The main objective of this study is to utilize the waste materials like paper, fly ash, rice husk ash into an effective building material. In this work an attempt has been made to introduce an alternative, cost effective, ecofriendly innovative building material in the form of brick. Here sand, cement, earth and other waste material like paper, fly ash and rice husk were mixed in various proportions and an optimum composition has been arrived. Papercrete brick have been made with sizes 230x110x80mm with the various proportions. Among the various combinations the padobe brick gave more compressive strength 6.47N/mm2 and recommended for even load bearing walls. Among the fibrous bricks some of the combinations got a compressive strength more than 3.5N/mm2 but failed to satisfy the water absorption requirements and hence recommended for inner partition walls. The water absorbed by padobe was found to be 14.95% and shows its suitability. The weight of the padobe brick is found to be between to 1/3rd of the conventional clay bricks. Since these bricks are relatively less in weight and more flexible and hence it is an ideal material for earthquake prone area. So, it can have a check on environmental pollution by utilizing the waste material to develop an effective and economical construction material.
Keywords : Paper, Concrete, Papercrete, Padobe bricks and Strength

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