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Search Results: 1 - 9 of 9 matches for " Gunasekhar Bathina "
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Receiver Based Geographic Multicast Routing in Ad Hoc Networks
Koteswararao Nuthalapati,Poornima Samamthula,Gunasekhar Bathina
International Journal of Computer Science and Mobile Computing , 2013,
Abstract: Existing multicast routing protocols uses multicast trees (or mesh) where receiving nodesmaintains routing information. In sensor networks where traffic is bursty, this multicast state maintenanceadds a large amount of overhead to the routing. Thus, we have developed a stateless receiver-based multicastgeographic routing protocol that simply embeds list of the multicast members (e.g., sinks), in packet headers.The receivers will decide the best way to forward the multicast load. This protocol, calledRBGeographicMulticast exploits the knowledge of the geographic locations of the nodes to remove the needfor costly state maintenance (e.g., tree/mesh/neighbour table maintenance), making it ideally suited for Adhoc network multicast applications.
An unusual case presentation of spontaneous coronary artery dissection  [PDF]
Sudeep Thumma, Jaya Bathina, Satish Madiraju, David H. Spodick, Prasad Maddukuri
World Journal of Cardiovascular Diseases (WJCD) , 2012, DOI: 10.4236/wjcd.2012.24049
Abstract: Spontaneous coronary artery dissection is a rare cause of acute myocardial infarction in the young which can be life threatening. The clinical presentation is wide, ranging from simple chest pain to sudden death. Asymptomatic spontaneous coronary dissection is extremely rare. We present a case of asymptomatic spontaneous coronary artery dissection which was managed conservatively; we also review the literature and various treatment options.
Myocardial Infarction due to Endocarditis
Jaya D. Bathina,Syed Wamique Yusuf
Cardiology Research and Practice , 2011, DOI: 10.4061/2011/950483
Abstract: We present a case of a 43-year-old man who sustained a myocardial infarction due to infective endocarditis. 1. Introduction Myocardial infarction (MI) is usually due to underlying atherosclerosis, but can also occur uncommonly due to embolic phenomenon associated with endocarditis. 2. Case Report A 43-year-old male with a history of acute myeloid leukemia and multiple episodes of bacteremia presented to the hospital with syncope. A computerized tomographic (CT) scan of the head showed multiple cerebral infarcts. One week later he developed chest pain. On examination his blood pressure was 118/65?mm?Hg with no signs of heart failure. A 12-lead electrocardiogram showed ST elevation in inferior leads, V5 and V6 (Figure 1). Laboratory tests showed an elevated Troponin I with a peak value of 6.9?ng/mL (normal value <0.4?ng/mL) and normal blood cultures. A diagnosis of ST elevation myocardial infarction (MI) was made, and the patient was treated with aspirin, beta-blockers, and nitrates. The diagnosis of MI due to endocarditis in our case was made on clinical grounds, and coronary angiogram was not done. Heparin was not given due to a history of severe thrombocytopenia. A transesophageal echocardiogram showed vegetations on mitral and aortic valves, mitral regurgitation, with normal left ventricular systolic function (Figure 2). CT scan showed multiple infarcts in lungs, spleen, and kidneys. He died one week later due to new cerebral infarcts. Postmortem examination was not carried out. Figure 1: A 12-lead electro cardiogram showing ST elevations in lead II, III, AVF, V5, and V6. Figure 2: A transesophageal echocardiogram showing vegetation on the mitral valve. 3. Discussion Systemic and pulmonary embolization is the most common presentation of nonbacterial thrombotic endocarditis (NBTE) [1]. Stroke is the commonest embolic event, frequently affecting the middle cerebral artery territory [2]. MI is not uncommon in NBTE patients with an incidence of 7.5% [3]. The management of MI in patients with endocarditis is similar to general population, but the use of thrombolytics can lead to bleeding complications [4]. Although heparin is traditionally used in cases of NBTE to prevent recurrent thromboemboli, there are no large scale trials of anticoagulants in patients with MI associated with NBTE. There are only few case reports of MI due to endocarditis, and both inferior and anterior wall MI has been documented in these cases [5, 6]. In cases where angiogram has been done, no specific pattern of coronary involvement has been documented [6].
Effect of Real Time N Management on Biomass Production, Nutrient Uptake and Soil Nutrient Status of Direct Seeded Rice (Oryza sativa L.)
Gunasekhar Nachimuthu,V. Velu,P. Malarvizhi,S. Ramasamy
American Journal of Plant Physiology , 2007,
Abstract: A field experiment was conducted at Tamil Nadu Agricultural University, Coimbatore, in deep clay soil (Vertic ustochrept) to study the effect of real time N management using Leaf Color Chart (LCC) on biomass production, nutrient uptake and soil available nutrient status in short duration rice (Var. CO 47) under direct wet (drum) seeded condition. The study was conducted in factorial randomized block design with three replications. The treatments included maintaining three LCC critical values (cv.) viz., LCC 3, 4 and 5 with different rates of N application (20, 25, 30 and 35 kg N ha-1 each time, besides absolute control (Zero-N), Blanket N (120 kg N ha-1in four equal splits from 21 Days After Sowing (DAS) and Manage N practices (120 kg N ha-1 in four unequal splits). The results of the experiment suggest that rate of biomass production and NPK uptake were highest during panicle initiation to first flowering stages for the tested variety CO 47 and LCC based N management have effectively saved the N fertilizer. The lack of difference in soil available nutrient between LCC based treatments and conventional blanket N treatment suggest that LCC based N management could be best option for farmers to save fertilizer N besides maintaining soil fertility. The results suggest further scope to standardise the LCC based N management for different intensively cultivated cultivars at specific location and season.
Relationship Between Index Leaf Nitrogen and Leaf Colour Chart (LCC) Values in Direct Wet Seeded Rice (Oryza sativa L.)
Gunasekhar Nachimuthu,V. Velu,P.Malarvizhi,S. Ramasamy
Asian Journal of Plant Sciences , 2007,
Abstract: Field experiment was conducted at the wetlands, Tamil Nadu Agricultural University, Coimbatore in deep clay soil (Vertic ustochrept) to study the relationship between Leaf Colour Chart critical value (LCC cv.) and index leaf nitrogen in CO 47 rice variety. The study was conducted in factorial randomized block design with three replications. The treatments included three levels of LCC cv. (LCC cv. 3, 4 and 5) with different rates of nitrogen (N) application (20, 25, 30 and 35 kg ha-1 at a time) along with three checks (control, blanket N (150 kg N ha-1 in four equal splits) and manage N practices (150 kg N ha-1 in four unequal splits). LCC readings were measured every week from 21 Days After Sowing (DAS) to 84 DAS and nitrogen fertilizer was applied as per treatment schedule. Index leaf N content was measured from 35 DAS to 84 DAS. There exist a positive correlation between index leaf N and LCC values. The higher leaf N content monitored at 49, 56, 63 and 70 DAS had its positive implications on the LCC values for atleast another two succeeding weeks of observation. The LCC values and index leaf N recorded in control plot during 35-84 DAS indicated that the native N supply of the experimental field itself was sufficient to maintain LCC cv. 3 after 35 DAS. However N fertiliser application is essential to maintain cv. 4 to increase the index leaf N and achieve crop performance similar to blanket N. Thus LCC values give an indirect measurement of index leaf N and serve as a tool for plant based fertiliser application.
Standardisation of Leaf Colour Chart Based Nitrogen Management in Direct Wet Seeded Rice (Oryza sativa L.)
Gunasekhar Nachimuthu,V. Velu,P. Malarvizhi,S. Ramasamy
Journal of Agronomy , 2007,
Abstract: Field experiment was conducted at the wetlands, Tamil Nadu Agricultural University, Coimbatore in Noyyal series deep clay soil (Vertic ustochrept), to standardise the Leaf Colour Chart critical value (LCC cv.) and the rate of nitrogen application in CO 47 rice variety. The study was conducted in factorial randomized block design with three replications. The treatments included three levels of LCC cv. (LCC cv. 3, 4 and 5) with different rates of N application (20, 25, 30 and 35 kg ha-1 at a time) along with three checks (control, blanket N (150 kg N ha-1 in four equal splits) and manage N practices (150 kg N ha-1 in four unequal splits)). LCC readings were measured every week from 21 Days After Sowing (DAS) to 84 DAS and nitrogen fertilizer was applied as per treatment schedule. The performance of blanket N and manage N were almost comparable among themselves in all aspects. Grain yield and straw yield increased with increasing LCC levels. The physical and economic optimum doses were found to be 141 and 139 kg N ha-1 to get the grain yield of 5356 and 5350 kg ha-1 respectively. LCC cv.5 which received 30 kg N ha-1 each time with a total dose of 150 kg N ha-1 recorded a grain yield of 5045 kg ha-1 was in corroboration to the predicted optimum dose and yield and also it gave a higher net income than blanket N. LCC cv.4, which received 20 kg N ha-1 each time with a total dose of 60 kg ha-1 recorded comparable yield with blanket N with a saving of 50% fertilizer nitrogen. Hence, under direct wet (drum) seeded condition, L5N30 (LCC cv.5 at the rate of 30 kg N ha-1 each time) can be recommended for a high resource farmer to get higher net income and L4N20 (LCC cv.4 at the rate of 20 kg N ha-1 each time) can be recommended for a low resource farmer to get 50% fertilizer N saving and comparable rice yields with the blanket N.
Cardiac tumors in a tertiary care cancer hospital: clinical features, echocardiographic findings, treatment and outcomes
Syed Wamique Yusuf,Jaya D. Bathina,Suhail Qureshi,Husnu Evren Kaynak
Heart International , 2012, DOI: 10.4081/hi.2012.e4
Abstract: Cardiac tumors are a rare entity, comprised of tumors with diverse histology and natural history. We report the clinical characteristics, echocardiograhic findings, therapy and outcome of 59 patients with primary and metastatic cardiac tumors. Our institutional echocardiogram data base from 1993 through 2005 was reviewed to identify patients diagnosed with intra-cardiac tumor. A total of 59 patients with cardiac tumors were identified and included in the study. The patient’s characteristics, presenting symptoms, diagnostic tests, location, histology of the tumor, treatment and one year survival rate of this population was collected from the medical records. Of the 59 cardiac tumor cases, 16 (27%) were primary cardiac tumors and 43 (73%) were secondary cardiac tumors. The most common primary tumor was sarcoma affecting 13 (81%) of the 16 cases. Of these, 5 patients were angiosarcoma, 5 unclassified sarcoma, one myxoid sarcoma and 2 maignant fibrous histiocytoma. The mean age at presentation was 41.1 years, and the most common location was right atrium affecting 6 cases (37.5%). The most common symptom of dyspnea was present in 10 (62.5%) cases. Eleven (25.6%) of the 43 secondary cardiac tumors were metastasis from renal cell carcinoma. The mean age at presentation was 55.4 years. Right atrium was the most frequent location affecting 18 (42%) of the 43 patients. The most common presenting symptom was dyspnea in 15 (35%) cases. For both primary and secondary tumors, dyspnea was the most common symptom and right atrium was most frequently involved. Sarcoma was the most common primary cardiac tumor while metastasis from renal cell carcinoma was the most common secondary tumor.
2-(2,6-Dimethoxyphenyl)-5-hydroxy-7-methoxy-4H-1-benzopyran-4-one
R. Ravi Kumar,M. Krishnaiah,N. Jagadesh Kumar,D. Gunasekhar Reddy
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809032383
Abstract: In the title compound, C18H16O6, the dimethoxyphenyl ring is rotated by 61.8 (1)° from the plane of the benzopyran system. The molecule is stabilized by an intramolecular O—H...O hydrogen bond.
Apical hypertrophic cardiomyopathy
Syed Wamique Yusuf,Jaya D Bathina,Jose Banchs,Elie N Mouhayar
World Journal of Cardiology , 2011, DOI: 10.4330/wjc.v3.i7.256
Abstract: We describe a patient with asymptomatic apical hypertrophic cardiomyopathy (AHCM) who later developed cardiac arrhythmias, and briefly discuss the diagnostic modalities, differential diagnosis and treatment option for this condition. AHCM is a rare form of hypertrophic cardiomyopathy which classically involves the apex of the left ventricle. AHCM can be an incidental finding, or patients may present with chest pain, palpitations, dyspnea, syncope, atrial fibrillation, myocardial infarction, embolic events, ventricular fibrillation and congestive heart failure. AHCM is frequently sporadic, but autosomal dominant inheritance has been reported in few families. The most frequent and classic electrocardiogram findings are giant negative T-waves in the precordial leads which are found in the majority of the patients followed by left ventricular (LV) hypertrophy. A transthoracic echocardiogram is the initial diagnostic tool in the evaluation of ACHM and shows hypertrophy of the LV apex. AHCM may mimic other conditions such as LV apical cardiac tumors, LV apical thrombus, isolated ventricular non-compaction, endomyocardial fibrosis and coronary artery disease. Other modalities, including left ventriculography, multislice spiral computed tomography, and cardiac magnetic resonance imagings are also valuable tools and are frequently used to differentiate AHCH from other conditions. Medications used to treat symptomatic patients with AHCM include verapamil, beta-blockers and antiarrhythmic agents such as amiodarone and procainamide. An implantable cardioverter defibrillator is recommended for high risk patients.
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