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Search Results: 1 - 10 of 419744 matches for " M. Mathan Kumar "
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Design and Development of Secret Session Key Generation using Embedded Crypto Device-ARM-LPC 2148
C. Mohan Raj,M. Mathan Kumar,D. Manivannan,A. Umamakeswari
Journal of Artificial Intelligence , 2013,
Abstract: Wireless networks are capable solutions for many industrial and commercial applications. However, a wireless node endures with lots of constraints such as low computation ability, little memory, partial energy resources and so on. In secure communication, different numbers of end devices are used to share the information between wireless devices and also are protected with the help of crypto algorithm and secret keys. The secret keys play a very important role than the algorithm, to ensure the security of the information between different numbers of users. When members of a group need to accept the similar information security and are permitted to dynamically join or leave the group, security entails not only sharing of a secret among lots of users but also be worried with security services like confidentiality, integrity of information as the connection changes. Whenever the system changes, the system manager is responsible to change the secret and supporting keys and to send back the updated keys to the group members. These different numbers of secret keys used in the end devices are generated using software and hardware techniques. In this study the different numbers of secret keys are generated using hardware. LPC 2148 are used to generate the random secret session key with real time parameters, event driven circuits and temperature measurement unit. In all the scenarios, the randomness, issues in hardware are analyzed and discussed.
Safety and Efficacy of a Novel Everolimus-Eluting Stent System in “Real-World” Patients with Coronary Artery Disease: A Report of Preliminary Outcomes  [PDF]
Sridhar Kasturi, Srinivas Polasa, Shailender Singh, Vijay Kumar Reddy, Kondal Rao, Ganesh Mathan, Shiva Kumar Bandimida, Manikandhar Pendyala, Chandrashekar Challa
World Journal of Cardiovascular Diseases (WJCD) , 2016, DOI: 10.4236/wjcd.2016.612049
Introduction: Tetrilimus (Sahajanand Medical Technologies Pvt. Ltd., Surat, India) is a recently-introduced biodegradable-polymer coated everolimus-eluting cobalt-chromium coronary stent system with an ultra-thin strut thickness. We aimed to evaluate the clinical outcomes with Tetrilimus coronary stents in “real-world” patients with coronary artery disease. Methods: In this retrospective, single-arm, open-label, multi-center registry, all consecutive patients who received Tetrilimus stents between July-2015 and April-2016 at two tertiary-care centers in India were analyzed. Primary endpoint was 30-day incidence of major adverse cardiac events (MACE), defined as a composite of cardiac death, myocardial infarction, target lesion revascularization, and target vessel revascularization. The Academic Research Consortium (ARC)-defined stent thrombosis was assessed as additional safety endpoint. Results: During the study period, 280 Tetrilimus stents (1.4 ± 0.5 stent/patient) were implanted to treat 252 coronary lesions (1.1 ± 0.3 stent/lesion) in 208 patients (age: 57.5 ± 11.9 years). Of study population, 65.9% were males, 46.6% were hypertensives, 25% were diabetics, 36.5% were alcoholics, 29.3% were smokers, 13.9% were tobacco chewers, 5.3% had previous revascularization, and 45.2% displayed multi-vessel disease. Of treated lesions, 67.5% were complex and 18.7% had total occlusion. Average length and diameter of implanted stents were 25.5 ± 8.8 mm and 2.9 ± 0.3 mm respectively. Subsequently, 30-day MACE were reported in 2 (0.96%) patients; both cases owing to in-hospital cardiac deaths. Events of stent thrombosis or noncardiac death were not reported in any patient. Conclusion: Low MACE rates and absence of stent thrombosis at early 30-day follow-up indicates that Tetrilimus everolimus-eluting stents may have encouraging safety and efficacy in unselected “real-world” patients with coronary artery disease.
One-Year Clinical Outcomes of Biodegradable Polymer-Coated Sirolimus-Eluting Coronary Stent System in Patients with Coronary Artery Disease  [PDF]
Sridhar Kasturi, Shailender Singh, Vijay Kumar Shanivaram, Kondal Rao Gollamandala, Ganesh Mathan, Shiva Kumar Bandimida, Manikandhar Pendyala, Chandrashekar Challa
World Journal of Cardiovascular Diseases (WJCD) , 2017, DOI: 10.4236/wjcd.2017.78022
Abstract: Background: The biodegradable polymer-coated sirolimus-eluting coro-nary stent (SES) system for the treatment of coronary artery disease (CAD) has been implanted in a real-world patient population. Aim: The present study was designed to evaluate the safety and performance of MetaforTM sirolimus- eluting coronary stent (SES) system in consecutive patients with CAD in a real-world patient population. Methods: All the consecutive 251 patients who underwent percutaneous coronary interventions with the use of Metafor sirolimus-eluting stents were included in this study. Patients were clinically/tele- phonically followed-up at one-year from August 2015 to August 2016. We observed and analyzed major adverse cardiac event (MACE) defined as the aggregate of cardiac death, myocardial infarction (MI), and any target lesion revascularization (TLR) at one-year. Also, stent thrombosis (ST) was observed at one-year patients follow-up. Results: We collected and analyzed the data for 251 patients. Out of 251 participants, 191 (76.1%) were males, 95 (37.8%) patients had diabetes, 117 (46.6%) had ST-segment-elevation myocardial infarction (STEMI), and 134 (53.4%) had hypertension. Mean patient age was 56.35 ± 11.23 years. A total of 295 lesions were treated, out of which 13.6% of the lesions were the long lesion of ≥40 mm. At one-year, MACE occurred in 4 (1.6%) of 251 patients, consisting of 2 (0.8%) cardiac deaths, 2 (0.8%) MI, and 0 (0%) TLR. Stent thrombosis was reported in one patient (0.4%). Conclusions: This retrospective data demonstrated excellent safety and performance of Metafor SES in a “real-world” consecutive CAD patient, indicating low rates of MACE and ST at one-year follow-up.
Mr. N. Suresh Kumar,Mr. B. Mathan Kumar
International Journal of Computer Science and Mobile Computing , 2013,
Abstract: “Improved Method of Image Watermarking Using Cooley-Tukey Algorithm” presents atransformation and watermarking for Image Authentication. Initially, an image is taken and it istransformed by using Curvelet Transformation. This transformation was developed in order to representedges along curves more efficient than the traditional transformations. The concept of Fast FourierTransformation (FFT) algorithm is used in this paper to perform Curvelet Transformation. There are manyFFT algorithms exists and the most common FFT is the Cooley-Tukey algorithm, which is a divide andconquer algorithm. A secret image is taken and embeds with that transformed image. Then the Inverse FFTis applied to obtain the watermarking image. Finally, the embedded secret image is extracted using extractiontechnique. The resultant extract image is compared with the original secret image by calculating ratios usingPeek signal to Noise Ratio (PSNR). PSNR calculation of 2 images, one original and an extracted image,describes how far 2 images are equal. The higher the PSNR, the better the quality of the compressed orreconstructed image.
Data Intelligent Low Power High Performance TCAM for IP-Address Lookup Table  [PDF]
K. Mathan, T. Ravichandran
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.711313
Abstract: This paper represents current research in low-power Very Large Scale Integration (VLSI) domain. Nowadays low power has become more sought research topic in electronic industry. Power dissipation is the most important area while designing the VLSI chip. Today almost all of the high speed switching devices include the Ternary Content Addressable Memory (TCAM) as one of the most important features. When a device consumes less power that becomes reliable and it would work with more efficiency. Complementary Metal Oxide Semiconductor (CMOS) technology is best known for low power consumption devices. This paper aims at designing a router application device which consumes less power and works more efficiently. Various strategies, methodologies and power management techniques for low power circuits and systems are discussed in this research. From this research the challenges could be developed that might be met while designing low power high performance circuit. This work aims at developing Data Aware AND-type match line architecture for TCAM. A TCAM macro of 256 × 128 was designed using Cadence Advanced Development Environment (ADE) with 90 nm technology file from Taiwan Semiconductor Manufacturing Company (TSMC). The
Clinical and gross pathological findings of congenital spina bifida and sacrococcygeal agenesis in an Omani crossbred calf
Somasundaram Mathan Kumar,Eugene Harper Johnson,Mohamed Hasan Tageldin,Ravi Padmanaban
Veterinary World , 2013, DOI: 10.5455/vetworld.2013.357-359
Abstract: The objective of this case report was to describe the gross post-mortem findings of a rare clinical case of spina bifida and congenital sacrococcygeal agenesis in an Omani cross-bred calf. A three week-old Omani female cross-bred calf was recumbent at birth. Clinical examination revealed that the calf was mentally alert, but exhibited stiff and extended pelvic limb joints. The pectoral limbs were apparently normal. The calf had a fistulated circular excrescence in the skin (three centimeter in diameter) on the dorsal midline region of sacral region. The area surrounding the excrescence was void of hair. The calf also did not have a tail. Upon clinical consideration of the prolonged recumbency and suspected congenital skeletal defect, the calf underwent euthanasia. The observed gross post-mortem findings of the present case study were spina bifida, anury, partial sacral agenesis, scoliosis, misshapen ilium and a narrow pelvic canal. No abnormalities in the caudal abdominal organs were found. To the best of our knowledge this is the first reported case of spina bifida and sacrococcygeal agenesis in an Omani cross-bred calf. [Vet World 2013; 6(6.000): 357-359]
Black Quarter in crossbred dairy cattle- A Case Report
Umar Nazir Zahid,S. Mathan Kumar,Sarnarinder Singh Randhawa, Swaran Singh Randhawa,Mir. Nadeem Hassan
Veterinary World , 2012, DOI: 10.5455/vetworld.2012.767-770
Abstract: Aim: A sporadic incident of Clostridial disease that affected Holstein Friesian (HF) cross bred cows (n=8) at an organized dairy farm was investigated. Materials and Methods: Detailed clinical investigations and treatment were carried out on all the affected animals. Complete blood count (CBC) and plasma biochemistry were performed on survived animals (n=6). The needle biopsy samples were subjected to culture and identification of the organism by Gram staining. Results: Two cows were died before instituting the treatment in this clinical incident. The carcasses were seen with typical bloated appearance immediately after death, laying one side with affected leg stuck out. Post-mortem of the carcasses were not been carried out. Pertinent findings of the CBC were a relative neutrophilia whilst a normal total leucocyte count and lowered Hb. Plasma biochemical parameters revealed significant increase in the mean activity of aspartate aminotransferase while alanine aminotransferase levels were within limits. Gram's staining of the inoculated culture revealed the presence of small gram-positive rods with sub terminal spores. Clinical treatment of the cases was performed with administration of heavy dose of crystalline penicillin and non-steroidal anti-inflammatory drugs (NSAIDS). Clinical recoveries of the cases were good and cessation of spread within the herd confining itself as a sporadic clinical incident. Conclusion: Sporadic Clostridiosis (BQ) of eight cross bred dairy cows was dealt in the present case study by including the details of its alterations in hematological parameters, Plasma biochemical parameters, observation of characteristic clinical signs of the disease and employment of empirical treatment with Penicillin. [Vet World 2012; 5(12.000): 767-770]
On a mixed problem in Diophantine approximation
Yann Bugeaud,Bernard De Mathan
Mathematics , 2009, DOI: 10.4064/aa139-1-6
Abstract: Let $d$ be a positive integer. Let $p$ be a prime number. Let $\alpha$ be a real algebraic number of degree $d+1$. We establish that there exist a positive constant $c$ and infinitely many algebraic numbers $\xi$ of degree $d$ such that $|\alpha - \xi| \cdot \min\{|\Norm(\xi)|_p,1\} < c H(\xi)^{-d-1} (\log 3 H(\xi))^{-1/d}$. Here, $H(\xi)$ and $\Norm(\xi)$ denote the na{\"\i}ve height of $\xi$ and its norm, respectively. This extends an earlier result of de Mathan and Teuli\'e that deals with the case $d=1$.
Politics of Hunger and Development: A Sociological Review of India’s Developmental Discourse  [PDF]
M. Ashok Kumar
Sociology Mind (SM) , 2012, DOI: 10.4236/sm.2012.24050
Abstract: This paper attempts to address the problem of hunger from the viewpoint of its social face against the backdrop of fast growing economy of India. Current sad state of affairs in the domain of poverty and hunger are nothing but the cumulative result of what happens in the Indian development planning since Independence, or at least in the name of development planning. This paper sociologically examines three most critical events in the history of Indian development planning, which are introduced to mitigate hunger and poverty, in both urban and rural India. The central focus of this paper is to highlight politics of those development initiatives and liquidation of public planning at the level of implementation, which eventually increased the gap between rich and poor, and left the Indian poor to their own fate. This paper also examines the most significant aspect of delinking power relations from the development discourse of India by providing more room for populist ideas with an aim to gain political mileage by the ruling elite. The present state of affairs with respect to poverty and hunger coupled with low standards of health, literacy and social awareness in India call for serious introspection. This paper, therefore, critically looks at Indian development discourse from the perspective of power relations, both established and emerging, which could alter our views on India and its growth story.
In vitro evaluation of fungitoxicity of selected natural products on heavy inoculum and conidial germination of Fusarium moniliforme
Indian Phytopathology , 2011,
Abstract: Certain selected natural products were screened under in vitro conditions for their fungitoxicity against Fusarium moniliforme. The results revealed that neem leaf extract (60%), buffalo urine (20%) and poultry litter (40%) concentration were able to inhibit the mycelial growth of F. moniliforme. Also, these products inhibited four 11 mm fungal discs of the pathogen (heavy inoculum) in a Petri plate. In case of spore germination neem leaf extract 40%, buffalo urine 20%, poultry litter 40% recorded total inhibition of spore germination.
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