Informatics Publishing Limited

K. Sangeetha ¹, K. Vijayakumar ², K. Nithyanandham ³

Affiliations
1 Madras School of Economics, Chennai 600 025, IN
2 Sri Nandhanam College of Engineering, Thriupattur, Vellore District, Taminadu 635601, IN
3 University Library, Anna University, Chennai 600 025, IN

Abstract

Studying the impact of technostress among the students is an interesting exercise. The students agreed that computers were an important part of daily life and they agreed to learn about them to feel competent to use them. This research particularly highlights the symptoms of technostress faced by them. The students viewed their suggestions and measures and indicated that they would adopt in daily routine to overcome technostress. Thus this research is undertaken in view to eradicate technostress among the students who uses the library.

Keywords

Technostress-Symptoms, Technostress-Strategies, Technostress-Students, Computerphobia.

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K. Sangeetha ¹, K. Ravikumar ²

Affiliations
1 Bharathiyar University, Coimbatore, IN
2 Computer Science Department, Tamil University, IN

Abstract

Objective: The main intent of this research is to improve the quality-of-service in the Tor anonymous communication network by splitting the traffic and scheduling it according to the traffic load. Methods: In this manuscript, a Novel Traffic, Dividing and Scheduling (NTDS) mechanism is introduced for improving performance in the Tor anonymous communication network. The performance of the tor network is described by using various network metrics such as bandwidth, latency, jitter, loss etc. In this mechanism, the traffic load is disseminated across circuits depends on each circuit bandwidth capacity, congestion level, measured latency, throughput. Results: The Novel Traffic, Dividing and Scheduling (NTDS) mechanism show higher performance when compared to the existing router selection method. Throughput, congestion level, latency and available bandwidth are measured for the circuit and based on this the traffic is split and scheduled. If the number of nodes is 50, the packet delivery ratio is 70% in NTDS, the throughput in NTDS is 72% and end-to-end delay is 0.69. According to the comparison results, the proposed approach works better than the other existing systems with high quality-of-service. Conclusion: The findings demonstrate that the Novel Traffic, Dividing and Scheduling (NTDS) mechanism is presented and suggested that this method has high quality-of-service.

Keywords

Anonymous Communication Network, Bandwidth Estimation, Quality-Of-Service, Path Selection, Tor Network.

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K. Sangeetha ¹, T. Parameswaran ¹, V. Krishna Kumar ¹, K. Kalai Selvi ¹, T. Shanmuga Priya ¹

Affiliations
1 Anna University of Technology, Coimbatore, IN

Abstract

Cooperative proxy caching method have been proposed for reduce the burden produced by P2P traffic on Internet Service Providers (ISPs).In this paper, we propose two models for cooperative proxy caching of P2P traffic. The first model enables cooperation among caches in different autonomous systems (ASs), second model enables cooperation among caches within the same autonomous system. Then we propose simple object replacement polices for web caching in peer-to-peer network. Then we analyse different angles of cooperative caching schemes, our results are: 1) significant improvement in byte hit rate, 2) the simple object replacement polices are sufficient to attain maximum gain.3) the overhead produced by cooperative caching is negligible.4) the P2P traffic imposed on ISPs are reduced significantly. Our model confirms substantial gains from cooperative caching are attainable under wide range of traffic and network characteristics.

Keywords

Peer-to-Peer Systems, Web Caching, Cooperative Caching, Traffic Modelling, Object Replacement Policies.

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S. Saravanakuamar ¹, R. Karthiga ², K. Sangeetha ³

Affiliations
1 Department of ECE, Adithya Institute of Technology, Coimbatore, IN
2 Department of ECE, KPR Institute of Engineering and Technology, Coimbatore, IN
3 Department of ECE, Surya Engineering College, Erode, IN

Abstract

Image processing and analysis to diagnose retinal disease such as diabetic retinopathy (DR) productive computer based screening of large, populations at low cost require robust, automated image analysis. The diabetic patients have many disorders in their eyes. This research relies on the problem of detecting those abnormalities in the eye of a diabetic patient for the earlier detection of DR. Here a methodology is presented for the automatic detection of the blood vessels and abnormalities in the eye of diabetic patients using digital image processing algorithm (DIP).DIP allows the use of much more complex algorithm for image processing and hence offers more sophisticated performance of simple task. Half of all Americans diagnosed with diabetes develop diabetic retinopathy. People with Type I (juvenile onset) and Type II (adult onset) diabetes are at risk. This condition usually doesn't develop, however, until around 10 years after the onset of diabetes. Diabetic retinopathy may also occur in pregnant women with diabetes. Most diabetic individuals approximately 90% will eventually develop some degree of retinopathy. The chances of developing diabetic retinopathy increase the longer a person has had diabetes and the more severe the case. Diabetic retinopathy (DR) can be defined as damage to microvascular system in the retina due to prolonged hyperglycaemia. The prevalence of DR in the Chennai Urban Rural Epidemiology (CURES) Eye Study in south India was 17.6 per cent, significantly lower than age-matched western counterparts. However, due to the large number of diabetic subjects, DR is likely to pose a public health burden in India. CURES Eye study showed that the major systemic risk factors for onset and progression of DR are duration of diabetes, degree of glycaemic control and hyperlipidaemia. Hypertension did not play a major role in this cross-sectional analysis. The role of oxidative stress, atherosclerotic end points and genetic factors in susceptibility to DR has been studied. It was found that DR was associated with increased intima-media thickness and arterial stiffness in type2 Indian diabetic subjects suggesting that common pathogenic mechanisms might predispose to diabetic microangiopathy. Curcumin, an active ingredient of turmeric, has been shown to inhibit proliferation of retinal endothelial cells in vivo. Visual disability from DR is largely preventable if managed with timely intervention by laser. It has been clearly demonstrated that in type 2 south Indian diabetic patients with proliferative DR who underwent Pan retinal photocoagulation, 73 per cent eyes with good visual acuity (6/9) at baseline maintained the same vision at 1 yr follow up. There is evidence that DR begins to develop years before the clinical diagnosis of type 2 diabetes. Our earlier study demonstrated that DR is present in 7 per cent of newly diagnosed subjects, hence routine retinal screening for DR even at the time of diagnosis of type 2 diabetes may help in optimized laser therapy. Annual retinal examination and early detection of DR can considerably reduce the risk of visual loss in diabetic individuals.

Keywords

Diabetic Retinopathy, Indian Subjects, Prevalence, Risk Factors, Type 2 Diabetes Mellitus.

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R. Janani ¹, K. Sangeetha ², J. Priyanka ¹

Affiliations
1 Kingston Engineering College, IN
2 Department of ECE, Kingston Engineering College, IN

Abstract

In this paper, novel schemes based on greedy algorithm are proposed to reduce the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. For each proposed scheme, a simple transformation is performed on the partial transmit sequences in an iterative fashion to lower the PAPR. Computer simulations results show that all the proposed schemes can achieve PAPR reductions, but the performances of the PAPR reduction are different. To further evaluate their PAPR reductions, we compare the proposed schemes with the iterative flipping scheme. The results show that when the number of sub blocks is not large, some of the proposed schemes can offer better PAPR reduction performance than the iterative flipping scheme with comparable computational complexity. We propose an enhanced version of iterative flipping algorithm to efficiently reduce the PAPR of the OFDM signal. An adjustable parameter is chose based on the performance. Simulation results show that this new technique gives good performance with significantly lower complexity compared with the ordinary PTS scheme.

Keywords

Orthogonal Frequency Division Multiplexing (OFDM), Partial Transmit Sequence (PTS), Peak-To-Average Power Ratio (PAPR), Greedy Algorithm.

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S. Lakshmi Devi ¹, S. Nithyanandam ², K. Sangeetha ³

Affiliations
1 Ponnaiyah Ramajayam College of Engineering & Technology/Department of CSE, Thanjavur, IN
2 Ponnaiyah Ramajayam Engineering College/Department of CSE, Thanjavur, IN
3 Ponnaiyah Ramajayam Engineering College/Department of PG CS, Thanjavur, IN

Abstract

DSMS need to control its resources adaptively as stream characteristics and its query workload vary over time. To analysis an approach to adaptive resource management to adjusts window sizes and time granularities for continuous sliding window queries to keep resource usage within limits. In order to quantify the impact of the two techniques on a query plan, to evaluating the cost based system for the resource allocation. An throughout the experimental analyzes to demonstrate the effectiveness, scalability and accuracy of the cost based system.

Keywords

DSMS, Window Size, Sliding Window, Time Granularity.

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V. Anuradha ¹, K. Sangeetha ¹

Affiliations
1 Department of Food Service Management and Dietetics, Avinashilingam University, Coimbatore - 641 043, IN

Abstract

Nutritional adequacy is one of the key determinants of the quality of human resources everywhere. The problem of malnutrition in developing countries encompasses a spectrum of deficiencies of which the most devastating is a deficiency of one or more of the three micronutrients iron, vitamin A and iodine. About 30 per cent of the world's population is anaemic and about half of those cases are due to iron deficiency. Anaemia is one of the glaring deficiency in adolescent girls, which they acquire from childhood and increases in extent and magnitude during the reproductive age.

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K. Sangeetha ¹, Akhil A. Balakrishnan ¹

Affiliations
1 Department of Electrical Engineering, Jyothi Engineering College, Thrissur, Kerala, IN

Abstract

A step-up dc-dc converter with high voltage gain is handling in this paper. Nowadays renewable energy sources are widely used in Distributed Generation (DG) systems. DG systems are composed of micro sources like photovoltaic (PV) cells, fuel cells, wind power etc. However fuel cells and photovoltaic cells are low voltage sources to provide enough dc voltage for generating ac utility voltage. PV cells can be connected in series in order to obtain a large output voltage. But the main drawback is the efficiency is degraded due to the panel mismatch and partial shadowing. The PV panel parallel connected structure is more efficient than the series-connected configuration. Meanwhile, only a low voltage is generated with parallel connected Configuration. So for the aforementioned problem, high step up converters are used as a solution. In order to obtain high voltage gain, employing a switched coupled inductor and a switched capacitor in to one converter. The coupled inductor charges the capacitor, the voltage gain can be effectively increased, and the turns ratio of the coupled inductor can be also reduced. Beside from high voltage gain, lower conduction loss and higher power conversion efficiency is also offered as compared to conventional dc-dc converter. The steady state analysis and operating principles in continuous conduction mode are discussed. There are two modes of operation for this converter based on the charging and discharge of the coupled inductor. To study the performance of the switched coupled inductor high step up DC-DC converter with closed loop control, simulations has been carried out in MATLAB 2013 environment. Thus these current and voltage waveforms agreed with the operating principles and the steady-state analysis. The simulation results are tested at low power. The 12V input voltage is stepped up to output voltage of 132V.

Keywords

Coupled Inductor, High Step-Up Converter, Switched Capacitor, Voltage Lift Network.

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M. Deepan Babu ¹, S. Vasuki ¹, K. Sangeetha ¹, D. Joaniepriya ²

Affiliations
1 Rajiv Gandhi Salai, Kelambakkam, Kancheepuram, District Tamil Nadu, IN
2 Chettinad College of Nursing, Rajiv Gandhi Salai, Kelambakkam, Kancheepuram, District Tamil Nadu, IN

Abstract

A descriptive study to assess the knowledge on pre-menopausal symptoms among middle aged women in a selected village at Kanchipuram district, Tamil Nadu, India. The objectives are to assess the knowledge of premenopausal symptoms among middle aged women in a selected village at Kanchipuram district, Tamil Nadu, India. To find out the association between level of knowledge with demographic variables. The convenience sampling technique was used to select 109 samples. Validity and reliability data collection tools were established. The data were collected by self-administered questionnaires. The collected data were tabulated and analyzed. Descriptive and inferential statistics were used. The study shows that 0% of the women had adequate knowledge, 15% of the women had moderate knowledge, and 94% of the women had inadequate knowledge regarding pre-menopausal symptoms.

Keywords

Knowledge, Pre-Menopausal Symptoms, Middle Aged Women.

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M. Venkata Ramana ¹, V. Sowmya ¹, K. Sangeetha ¹, K. Nagapreethi ¹, M. Mounika ¹, S. Divya ¹, A. Kanakalaxmi ¹

Affiliations
1 Department of Analysis and QA, Surabhi Dayakar Rao College of Pharmacy, Rimmanaguda, Gajwel, Telangana,, IN

Abstract

Literature survey reveals that few spectrophotometric, high performance liquid chromatographic (HPLC)and High performance thin layer chromatographic (HPTLC)methods were reported for the estimation of Amlodipine and perindopril in bulk and combined pharmaceutical dosage forms. But there is no any stability indicating high performance liquid chromatography study is reported for amlodipine. So the present study was aimed to development of simple, accurate, rapid and economical HPLC stability indicating assay method were established for the determination of Amlodipine and Peridopril in bulk and tablet dosage form. A High-performance liquid chromatograph WATERS, software: Empower 2,2695 separation module, 996 PDA detector, using Phenomenex Luna C18 (4.6mm×250mm) 5µm or equivalent column, with mobile phase composition of Methanol: Phosphate Buffer pH3.0 (70:30v/v) was used. The flow rate of 1.0ml min-1 and effluent was detected at 230nm. The retention time of Amlodipine and Perindopril was found to be 1.870min and 2.499minutes respectively. Linearity was observed over concentration range of 10-50µg ml-1 for Amlodipine and 16-80µg ml-1 for Perindopril respectively. The accuracy of the proposed method was determined by recovery studies and the Amlodipine was found to be 99.1% and Perindopril was found to be 98.8% respectively. The proposed method is applicable to routine analysis of Amlodipine and Perindopril in bulk and pharmaceutical formulations. The proposed method was validated for various ICH parameters like linearity, limit of detection, limits of quantification, accuracy, precision, range and specificity.

Keywords

Amlodipine, Perindopril, Angina, Anti - hypertensive agent, Validation.

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