Informatics Publishing Limited

M. Suganthy ¹, P. Sakthivel ¹

Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN

Abstract

Predatory potential of Chrysoperla zastrowi sillemi (Esben-Peterson) and Cryptolaemus montrouzieri Mulsant on Paracoccus marginatus (Williamsand Granara de Willink) infesting sunflower was studied in the lab. Results revealed that grubs of C. zastrowi sillemi was 1.4 ± 0.5, 85.0 ± 7.3 and 13.2 ± 1.3 ovisacs, nymphs and adults, respectively. Among various instars of the predator, second and third instar were voracious and consumed 1.6 ± 0.5, 139.0 ± 5.4 and 22.8 ± 2.1 and 3.4 ± 0.5, 230.4 ± 29.2 and 32.5 ± 2.6 ovisacs, nymphs and adults of P. marginatus, respectively. Grubs of C. montrouzieri fed 7.6 ± 0.7, 153.6 ± 23.8 and 62.8 ± 11.6 ovisacs, nymphs and adults of P. marginatus to complete their life stages. Among various instars of the predator, third and fourth instar were voracious and consumed 2.2 ± 0.4, 43.6 ± 2.0 and 23.2 ± 3.0 and 2.8 ± 0.4, 69.6 ± 4.6 and 27.6 ± 4.6 ovisacs, nymphs and adults of P. marginatus, respectively. Adult C. montrouzieri consumed on an average 5.2 ± 0.8, 101.2 ± 13.5 and 35.4 ± 8.6 ovisacs, nymphs and adults of P. marginatus.

Keywords

Predatory Potential, Chrysoperla zastrowi sillemi, Cryptolaemus Montrouzieri, Paracoccus marginatus, Sunflower.

Full Text

   

P. Sakthivel ¹, P. Karuppuchamy ¹, M. Kalyanasundaram ¹, T. Srinivasan ¹

Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu, IN

Abstract

Toxicity of selected insecticides to papaya mealybug parasitoid, Acerophagus papayae (Noyes and Schauff) (Hymenoptera: Encyrtidae) was evaluated at 1, 3, 6 and 24h after treatment (HAT). Results showed that Thiamethoxam, Chlorpyriphos and Dichlorvos showed very high knock-down effect (100 % mortality) of A. papayae adults within 3 HAT. Fish Oil Rosin Soap (FORS) and Neem oil had very less detrimental effect on adult parasitoids by recording very low mortality percentage at 24 HAT. The residual toxicity data revealed that Thiamethoxam was the most persisting insecticide causing 26.67 per cent mortality of A. papayae even after 28 days after treatment (DAT). Neem oil and Fish Oil Rosin Soap became less or non toxic to adults of A. papayae at three DAT.

Keywords

Toxicity, Insecticides, Acerophagus papayae.

Full Text

   

P. Sakthivel ¹, S. Karuppuchamy ¹, G. Paruthimal Kalaignan ¹, T. Vasudevan ¹, Natheera Begam ²

Affiliations
1 Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, Tamil Nadu, IN
2 Central Electrochemical Research Institute, Karaikudi 630 006, Tamil Nadu, IN

Abstract

The effect of some organic additives on the capacity performance of pressed pellet and sintered plate type cadmium electrodes has been studied. The additives under investigation are benzimidazole and polyvinyl alcohol. The organic electrode additives for the cadmium electrode of the nickel-cadmium battery is aimed mainly for increasing the discharge capacity and minimising the self discharge. It is found that pressed electrode can be used for low rates of discharge whereas the sintered electrodes can be used for both low and high rates of discharge. It is found that pressed electrode can be used for low rates of discharge whereas the sintered electrodes can be used for both low and high rates of discharge. The organic additive sources show better low and high rate performance for sintered cadmium electrodes.

Keywords

Nickel-Cadmium Batteries, Cadmium electrode, Organic additives.

Full Text

     

Anirban Mazumdar ¹, P. Sakthivel ¹, P. Muthuvel ², R. Ramesh ², C. R. Deepak ², M. A. Atmanand ²

Affiliations
1 Department of ECE, College of Engineering, Guindy (CEG), Anna University Chennai, Tamil Nadu, IN
2 Deep Sea Technologies & Ocean Mining, NIOT Campus, Pallikaranai, Chennai, Tamil Nadu, IN

Abstract

Load cells are the devices which can be used for different types of weighing applications. This paper presents the design of a pressure compensated strain gauge based load cell which can be operated for various deep sea applications. This load cell is a transducer that is used to convert a force or load into electrical signal. This conversion is indirect and happens in two stages. Through a mechanical arrangement, the force is sensed which deforms the strain gauge and the deformation (strain) is measured as an electrical signal, because the strain changes the effective electrical resistance of the wire. This load cell is designed with full Wheatstone bridge configuration for detecting both tension and compression load and also for ensuring better accuracy. The electrical signal output is typically of the order of a few mill volts and needs conditioning with necessary signal processing circuitry before it can be used further. Finally the device needs to be enclosed inside a pressure compensated enclosure which can withstand 600 bar outside pressure. The device is mainly designed considering the Indian Ocean parameters and it will work at a depth of 6000 meters under water.

Keywords

Load Cell, Strain Gauge, Strain, Transducer, Wheatstone Bridge, Signal Conditioning, Enclosure.

Full Text

     

S. Kiruthika ¹, G. V. Kanimozhi ¹, P. Sakthivel ¹

Affiliations
1 Department of Computer Science and Engineering, Dhirajlal Gandhi College of Technology, Salem, Tamilnadu, IN

Abstract

Privacy preservation in data mining provides security to sensitive data in a database against unauthorized access. Several anonymization techniques, such as generalization and bucketization, have been designed for privacy preserving micro data publishing. Recent work has shown that generalization loses considerable amount of information, especially for high dimensional data. Bucketization, on the other hand, does not prevent membership disclosure and does not apply for data that do not have a clear separation between quasi-identifying attributes and sensitive attributes. A novel technique called overlapping slicing, which partitions the data both horizontally and vertically and duplicates an attribute in more than one column. overlapping slicing preserves better data utility than generalization and can be used for membership disclosure protection.

Keywords

Bucketization, Overlapping, Anonymization, Slicing.

Full Text

     

S. Bhanumathi ¹, P. Sakthivel ²

Affiliations
1 Department of Computer Science and Engineering, Sathyabama University, Chennai-600119, IN
2 Department of Electronics and Communication Engineering, Anna University, Chennai-600025, IN

Abstract

Privacy preservation is an important component in designing various data mining applications to seek a trade-off between mining utilities and protecting private information. Due to vast advancements in internet, computing and communication, multiparty computation has great opportunities to perform cooperative computation on multiple parties. In multiparty computation, set of parties with similar background wants to collaboratively compute some function on their private inputs. This major challenge on researchers is how to protect privacy of their sensitive input data without disclosing it to others. Privacy preservation is done by Secure Multiparty Computation, Data Perturbation, Anonymization and Role based access control in multiparty environments. Several protocols have been developed for privacy preserving multiparty computation. These protocols are used to perform multiparty collaborative data mining to preserve privacy of data and knowledge when common users are involved in data mining. This paper describes various protocols for Secure Multiparty Computation and Data Perturbation along with certain security properties like correctness and privacy. Finally the comparisons of various protocols are also discussed.

Keywords

Privacy Preservation, Data Perturbation, Secure Multiparty Computation, Privacy Preserving Collaborative Data Mining, Security, Privacy.

Full Text

     

P. Sakthivel ¹, N. Nedunchezhian ², P. Ponnusamy ¹

Affiliations
1 Dept. of Mechanical Engg., Surya Engineering College, Erode, Tamilnadu, IN
2 Dept. of Automobile Engg., Institute of Road & Transport Technology, Chithod, Tamilnadu, IN

Abstract

This study discusses the effect of copper, nickel and chromium coating on the spark ignition engine performance, emission and combustion characteristics. The maximum brake thermal efficiency for copper coated engine is about 5% higher than standard engine at full load and about 4% higher than the standard engine at 2800 rpm. Nitrogen oxides emission for catalytic coated engine is 7% to 20% higher than standard engine at full load. It was observed that carbon monoxide and carbon dioxide emissions of standard engine were higher than catalytic coated engines at all loads. Copper coated engine has the lowest hydro carbon emission. Catalytic coated engines have 6% to 12% higher cyclinder pressure when compared to the standard engine. The crank angle of heat release values and combustion parameters indicate that a faster heat release occured for catalyst coated engines. Similarly combustion duration of standard engine is higher than that of catalytic coated engines. Catalytic coatings increase the pre-flame reactions which lead to better and faster combustion.

Keywords

Spark Ignition Engine, Catalytic Coatings, Emission Control, Brake Thermal Efficiency, Heat Release Rate.

Full Text

   

S. Bhanumathi ¹, P. Sakthivel ²

Affiliations
1 Department of Computer Science and Engineering, Sathyabama University, Rajiv Gandhi Road, Jeppiaar Nagar, Chennai - 600119, Tamil Nadu, IN
2 Department of Electronics and Communication Engineering, Anna University, Guindy, Chennai - 600025, Tamil Nadu, IN

Abstract

Background/Objectives: Secure Multi-party Computation (SMC) method is used to secure individual’s sensitive data during privacy preserving data mining and data publishing. This paper proposes a new protocol using real and ideal models of SMC to compute sum of multiple parties’ private data without revealing their data to each other. Methods/Statistical Analysis: Many approaches have been utilized for preserving privacy of sensitive data such as anonymization, data perturbation and SMC. In SMC, several protocols have been used for this purpose. Secure sum protocol is one of the important protocols, which is used to calculate the sum of private data secretly. Multiple parties perform the addition and subtraction operation based on the secure sum protocol and they transfer the intermediate sum among them through a trusted third party. Finally, trusted third party transforms sum to all the parties. Findings: The computation and communication cost is calculated in each round of computation and compared with the existing protocol. The empirical result shows that the proposed protocol out performed than the existing protocol in terms of computation and communication complexity. Applications/ Improvements: This protocol can be applied in various fields where the privacy preservation of sensitive data is needed such as insurance companies, banking system, government survey, hospitals, etc. The complexity of the protocol can be further reduced with high security in future.

Keywords

Computation and Communication Complexity, Privacy, Privacy Preservation, Secure Multi-Party Computation, Secure Sum Protocol

Full Text