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Search Results: 1 - 10 of 401341 matches for " M. Manivannan "
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International Journal of Engineering Science and Technology , 2011,
Abstract: The inhibition efficiency (IE) of Urea in controlling corrosion of carbon steel in sea water in the absence and presence of Zn2+ has been evaluated by weight loss method. The formulation consisting of 250 ppm urea and 50 ppm Zn2+ has 94% IE. It is found that the inhibition efficiency (IE) of urea increases by the addition of Zn2+ion. A synergistic effect exists between urea and Zn2+. Polarization study reveals that Urea – Zn2+ system controls the cathodic reaction predominantly and suggests the formation of protective film on the metal surface. The nature of the protective film formed on the metal surface has been analyzed by FTIR spectra and AFM analysis. The protective film is found to consist of Fe2+ – Urea complex and Zn(OH)2. Based on the above studies a suitable mechanism has been proposed for the corrosion inhibition.
International Journal of Engineering Science and Technology , 2010,
Abstract: Design of Data Acquisition and Control System (DACS) is the challenging part of any measurement, automation and control system applications. These applications widely use the single chip data acquisition method. But this method leads to the problem of poor real time and reliability. And it doesn’t able to process with embedded webdocuments and networked embedded devices. The main objective of this work is to overcome these drawbacks and to design a system for remote I/O data acquisition and control by Linux portable Advanced RISC Machine (ARM) processor and in-build web server application with General Packet Radio Service (GPRS) technology. Real time Linux operating system is the better choice for any Embedded Real Time applications with minimal real time constraints. GPRS module eliminates the need of internet software suite in ARM processor and mass storage for web applications and allows the user to interface with many real time embedded applications like remote DACS and embedded processors like ARM Core.
A Comparison of Pinch Force between Finger and Palm Grasp techniques in Laparoscopic Grasping  [PDF]
Susmitha Wils K, George Mathew, M. Manivannan, Suresh R Devasahayam
Engineering (ENG) , 2012, DOI: 10.4236/eng.2012.410B012

Laparoscopic surgery is a new abdominal surgical procedure which helps the patients in many ways like less hospital stay, faster recovery and reduced pain. The main disadvantage in this surgical procedure is the reduced haptic perception by the surgeons due to the usage of laparoscopic instrument to handle tissues which in turn cause damage of it as compared to an open surgery. The primary aim of this investigation was to compare the pinch force applied during two different methods of laparoscopic grasping: Finger and Palm grasp. A low cost force sensing resistor tailor made for the grasper tip was designed and fabricated for quantifying the grasper tip force in the study. The results indicate more pinch force was applied during palm grasp as compared to finger grasp so as to prevent the slippage of the tissues from the jaws of the laparoscopic graspers.

Changes in Two Point Discrimination and the law of mobility in Diabetes Mellitus patients
R Periyasamy, M Manivannan, Vengesana Narayanamurthy
Journal of Brachial Plexus and Peripheral Nerve Injury , 2008, DOI: 10.1186/1749-7221-3-3
Abstract: The Semmes Weinstein monofilament (SWMF) was used to measure the loss of protective sensation. An Aesthesiometer was used to find the TPD of several areas in upper and lower extremities for normal and diabetic subjects. All the subjects were screened for peripheral artery occlusive disease with ankle brachial pressure index (0.9 or above).TPD of normal and diabetic subjects for different areas of hands and legs from proximal to distal is evaluated for 18 subjects. TPD values decrease from proximal to distal areas. Vierodt's law of mobility for TPD holds good for normal subjects in the hand and foot areas. The law of mobility for TPD in DM subjects holds well in the hand but doesn't hold well in foot areas with or without sensation.TPD is a quantitative and direct measure of sensory loss. The TPD value of diabetic subjects reveals that the law of mobility do not hold well for Diabetic subjects in foot areas. The significance of this result is that the TPD of the diabetic subjects could provide direct, cost effective and quantitative measure of neuropathy.Foot problems are the most common reason for hospitalization of diabetes mellitus (DM) patients. Neuropathy and impaired blood supply are the chief causes for foot ulceration in DM patients. In the presence of neuropathy, the primary factor for ulcer formation in diabetes is the loss of protective sensation [1,2]. Evaluation of sensibility on the feet of diabetic patients is important in order to properly identify the group with neuropathy and to establish prevention of ulceration for those at risk. Various modalities of sensation like temperature, vibration, point localization and two point discrimination (TPD) have been used to measure sensory loss. Semmes-Weinstein monofilament testing (10 gm) divides the huge population of DM subjects into subjects who are at risk but does not precisely determine the degree of progressive loss of sensation, or suggest degree of nerve compression and axonal loss. Specialist clinic
Association analysis between oil yield and its component characters in Jatropha
Umamaheswari D,M. Paramathma,N. Manivannan
Electronic Journal of Plant Breeding , 2009,
Abstract: The present study was undertaken to determine the correlation and path analysis in interspecific hybrids of Jatropha.Thirteen families along with one check were taken for study. The present investigation revealed that the characters such asseed yield per plant, weight of the capsules per plant, number of seeds per plant, number of capsules per plant, number offlower clusters per plant and oil content recorded siginificant and positive correlation with oil yield per plant. The pathanalysis also showed that the characters viz., weight of the capsules per plant and number of seeds per plant showed highpositive and direct effect on oil yield per plant, whereas number of capsules per plant recorded positive and high indirecteffect via number of seeds per plant on oil yield per plant.
Molecular genetic diversity analysis in seed sources of Jatropha (Jatropha curcas L) using ISSR markers
D. Umamaheswari, M. Paramathma and N. Manivannan
Electronic Journal of Plant Breeding , 2010,
Abstract: The extent of genetic diversity among 17 seed sources of Jatropha curcas was studied using 13 ISSR primers along with itscombinations. The number of bands produced by 13 individual primers ranged from 1 to 10. The percentage polymorphism orpolymorphic percentage ranges from 100 to 33.3 and the PIC value varied from 0.89 to 0.65. Among 13 ISSR primers, twoprimers viz., 895 and 899 produced 100% polymorphism.These genotypes were also tested with 78 combination primers for itsamplification. Out of seventy eight combinations, eight combinations were found to exhibit 100% polymorphism and its PIC valueranged from 0.86 to 0.38. The genetic similarity index was used to construct a dendrogram which illustrated that the 17genotypes fall into five clusters at 0.72 Jaccard’s similarity coefficient and the same data was used to construct the radial treeusing Darwin software. Both these software identified the two genotypes CJC 1 and CJC 19 as diverse. These diverseaccessions can be utilized in breeding programme to obtain more variability.
Low Actuation Voltage RF MEMS Switch Using Varying Section Composite Fixed-Fixed Beam
M. Manivannan,R. Joseph Daniel,K. Sumangala
International Journal of Microwave Science and Technology , 2014, DOI: 10.1155/2014/862649
Abstract: The present authors have earlier reported the employment of varying section fixed-fixed beam for achieving lower pull-in voltage with marginal fall in restoring force. Reducing Young’s modulus also reduces the pull-in voltage but with lesser degree of reduction in restoring force. Composite beams are ideal alternatives to achieve decreased Young’s modulus. Hence new varying section composite fixed-fixed beam type RF MEMS switch has been proposed. The main advantage of this RF MEMS switch is that lower pull-in voltages can be achieved with marginal fall in stiction immunity. Spring constant of the proposed switch has been obtained using simulation studies and it has been shown that the spring constant and therefore the pull-in voltage () can be considerably reduced with the proposed switch. Simulation studies conducted on the proposed switch clearly demonstrate that the pull-in voltage can be reduced by 31.17% when compared to the varying section monolayer polysilicon fixed-fixed beam. Further this approach enables the designer to have more freedom to design lower pull-in voltage switches with improved stiction immunity. 1. Introduction At present RF MEMS devices are gaining popularity due to their appreciable performance at RF and microwave frequencies unlike their semiconductor counterparts and this has led to the growth of RF MEMS switching devices which are much closer to ideal switches [1–12]. However, most micromachined switches use electrostatic pull-in [13, 14] for the control of switching action and their main drawback is high pull-in voltage () against the current trend of using low voltage power supplies which makes them useless in miniaturized mobile systems. In the last decade researchers worldwide have been focusing their effort to design switches with lower pull-in voltage. Three different approaches have been employed generally by researchers, namely, reducing the air gap, increasing the electrostatic actuation area, and decreasing the stiffness constant by either increasing the length or reducing the width [3, 15–19]. Among these three, the third approach is widely attempted. This approach depends on decreasing spring constant of the beams by increasing the beam length () and/or reducing the beam width () but ensuring that the beam does not show the tendency to stiction with the surface. In other words reduction in pull-in voltage must be achieved without any serious loss of restoring force . Hence it becomes necessary to find an approach where pull-in voltage is reduced but with minimum loss of . The present authors have earlier
5. Glycated haemoglobin (HbA1c) as a stable indicator of type 2 diabetes
P. Pasupathi,P. Manivannan,M. Uma,M. Deepa
International Journal of Pharmaceutical and Biomedical Research (IJPBR) , 2010,
Abstract: HbA1c expressed, as the percentage of adult haemoglobin that is glycated, is the most widely used measure of chronic glycaemia. Achieving near normal HbA1c levels have been shown to reduce long term complications and the HbA1c assay is recommended to determine whether treatment is adequate and to guide adjustments. However, daily adjustments of therapy are guided by glucose levels. We determined the relationship between an accurate measure of mean glucose levels over time and the HbA1c level, and whether HbA1c can be expressed in the same units as self monitoring results. The aim of the study was to assess whether HbA1c levels reflected mean blood glucose (MBG) levels in Type 2 diabetes. Despite the good correlation between HbA1c and MBG, the use of HbA1c alone for glycemic control monitoring in these patients could be insufficient to clearly trace their risk of complications. The study population consisted of 100 subjects divided into two groups viz. participants with diabetes (n=50) and non-diabetic (n=50). Changes in the levels of MBG and HbA1c were determined in diabetic and non-diabetic subjects. The level of blood glucose, HbA1c, MBG, microalbuminurea, urea and creatnine was significantly increased in diabetics than non diabetic subjects. There was a statistically significant relationship between MBG and HbA1c. The mathematical relationship established between HbA1c and MBG in this study should allow the expression of HbA1c as an equivalent for mean glucose level. This is likely to be beneficial to patients and care providers alike as the assay of chronic glucose control would be in the same units as the patient’s self-monitoring. However, before this transformation can take place, the mathematical relationship between HbA1c and MBG levels should be confirmed in a larger study with a more diverse population to ensure that the relationship applies for all diabetes patients.
Melanoma secondaries presenting as stroke.
Manivannan R,Aleem M,Rajarathinam A,Rajendran P
Neurology India , 1999,
Effect of Feed on the Biochemical Composition of Commercially Important Mud Crab Scylla tranquebarica (Fabricius 1798)
P. Soundarapandian,K. Manivannan; M. Sudhakar; R. Murugesan
International Journal of Animal and Veterinary Advances , 2010,
Abstract: The crab fishery in India is fast developing and there is a vast scope for the crab meat due to its delicacy and nutritional richness. In the present investigation an attempt has been made to study the effect of two feeds (Acetes sp. and clam meat) on the biochemical of composition commercially important mud crab, Scylla tranquebarica. The protein, carbohydrate, lipid, ash and moisture contents of the crabs fed with Acetes sp. was in higher side when compared to clam meat fed animals. B ut these differences are not statistically significant except protein. The total contribution of essential and nonessential amino acids and also saturated, monounsaturated and polyunsaturated fatty acids are more or less same for both Acetes sp. and clam meat fed crabs. Further feeding trail experiment is very much needed to confirm the quality of the feed.
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