Exclusion of Wormhole and Blackhole Attacks in Manets using Fuzzy Lamport Timestamp Algorithm

Security for any network is a primary concern as it is necessary to safeguard the resources that are being shared. A mobile ad-hoc network (MANET) enables the mobile devices to form a temporary network without any centralized infrastructure. MANET is vulnerable to several attacks, e.g. wormhole and blackhole attacks. Since there is increase in use of wireless communication, minimizing the intruders in wireless networks has been a high priority task. These attacks affect directly the performance of network. Eliminating such attacks in MANET is a challenging task. In this paper, a novel method that excludes the packets of wormhole and blackhole attacks in a MANET using fuzzy Lamport timestamp algorithm (FLTA) is proposed. The proposed FLTA is used to identify the order of event and to make synchronization of time clock in network device. The Lamport timestamp algorithm incorporates a fuzzy inference system to improve the performance of network. The simulated results of the proposed algorithm are compared with that of LTAWB [13] and SMTWB [12] for wormhole and blackhole attacks. It is observed that the proposed FLTA shows better performance as compared to LTAWB and SMTWB protocols in terms of throughput, end-to-end delay and packet delivery ratio

Razvoj i validacija spektrofotometrijskih metoda za određivanje ceftazidima u farmaceutskim doziranim pripravcima

Two spectrophotometric methods for the determination of ceftazidime (CFZM) in either pure form or in its pharmaceutical formulations are described. The first method is based on the reaction of 3-methylbenzothiazolin-2-one hydrazone (MBTH) with ceftazidime in the presence of ferric chloride in acidic medium. The resulting blue complex absorbs at λmax 628 nm. The second method describes the reaction between the diazotized drug and N-(1-naphthyl)ethylenediamine dihydrochloride (NEDA) to yield a purple colored product with λmax at 567 nm. The reaction conditions were optimized to obtain maximum color intensity. The absorbance was found to increase linearly with increasing the concentration of CFZM; the systems obeyed the Beer’s law in the range 210 and 1050 µg mL1 for MBTH and NEDA methods, respectively. LOD, LOQ and correlation coefficient values were 0.15, 0.79 and 0.50, 2.61. No interference was observed from common excipients present in pharmaceutical formulations. The proposed methods are simple, sensitive, accurate and suitable for quality control applications.Razvijene su dvije spektrofotometrijske metode za određivanje ceftazidima (CFZM), čistog ili u farmaceutskim pripravcima. Prva metoda se temelji na reakciji 3-metilbenzotiazolin-2-on hidrazona (MBTH) sa ceftazidimom u prisutnosti željezovog(III) klorida u kiselom mediju. Nastaje plavi kompleks s maksimumom apsorpcije pri λmax 628 nm. Druga metoda se temelji na reakciji između diazotiranog lijeka i N-(1-naftil)etilendiamin dihidroklorida (NEDA), pri čemu nastaje ljubičasti produkt s λmax pri 567 nm. Reakcijski uvjeti su optimirani da se dobije maksimalni intenzitet boje. Apsorbancija raste linearno s porašću koncentracije CFZM; sustavi slijede Beerov zakon u koncentracijskom području 210 za MBTH metodu i 1050 µg mL1 za NEDA metodu. LOD i LOQ te vrijednosti korelacijskog koeficijenta su 0,15, 0,79 i 0,50, 2,61. Uobičajene pomoćne tvari ne smetaju određivanju ceftazidima. Predložene metode su jednostavne, osjetljive, točne i pogodne za primjenu u kontroli kvalitete

Seismology of the Sun : Inference of Thermal, Dynamic and Magnetic Field Structures of the Interior

Recent overwhelming evidences show that the sun strongly influences the Earth's climate and environment. Moreover existence of life on this Earth mainly depends upon the sun's energy. Hence, understanding of physics of the sun, especially the thermal, dynamic and magnetic field structures of its interior, is very important. Recently, from the ground and space based observations, it is discovered that sun oscillates near 5 min periodicity in millions of modes. This discovery heralded a new era in solar physics and a separate branch called helioseismology or seismology of the sun has started. Before the advent of helioseismology, sun's thermal structure of the interior was understood from the evolutionary solution of stellar structure equations that mimicked the present age, mass and radius of the sun. Whereas solution of MHD equations yielded internal dynamics and magnetic field structure of the sun's interior. In this presentation, I review the thermal, dynamic and magnetic field structures of the sun's interior as inferred by the helioseismology.Comment: To be published in the proceedings of the meeting "3rd International Conference on Current Developments in Atomic, Molecular, Optical and Nano Physics with Applications", December 14-16, 2011, New Delhi, Indi

FORMULATION AND COMPARATIVE EVALUATION OF ONDANSETRON HYDROCHLORIDE MOUTH DISSOLVING TABLETS IN INDIA

Objective: The aim of the present study was to prepare the ondansetron hydrochloride Mouth Dissolving Tablets (MDTs) followed by its comparison with ethical and non-ethical (generic) marketed tablets. Methods: Prior to the formulation, drug excipient compatibility study was carried out by FTIR spectroscopy. The λmax was determined by UV spectroscopy. The ondansetron hydrochloride MDTs were prepared by direct compression method using Sodium Starch Glycolate (SSG) as super disintegrant and camphor as a sublimating agent. Then the prepared MDTs were subjected to evaluation of post compression parameters such as thickness and diameter, weight variation, wetting time, hardness, friability, disintegration and dissolution. The results obtained were compared with that of ethical and non-ethical marketed ondansetron hydrochloride 4 mg tablets. Results: The λmax was found at 310 nm. FTIR study revealed that excipients used in the prepared formulations are compatible with the drug. The thickness and diameter was in the range of 2.646 to 3.27 mm and 6.0 to 8.12 mm, respectively. Friability was in the range of 0.43 to 0.88 % and had a slightly higher friability (1.27%) for sublimated tablets. Wetting time and disintegration time were in the range of 15 to 40 sec and 23 to 50 sec, respectively. The 100 % drug release was found within 180 sec for all the codes. These results were then compared with non-ethical film coated ondansetron marketed tablets. Conclusion: Ondansetron hydrochloride MDT 4 mg tablets prepared in the laboratory were under specified IP limits. The experimental findings demonstrated that any of these ethical and non-ethical tablets of ondansetron hydrochloride can be selected, advised by the physician or pharmacist, as per the patient’s need and economical status

Micronutrient Profiles and Oxidative Stress in Metabolic Syndrome: A Comparative Analysis and Cardiovascular Risk Assessment

Metabolic syndrome, a complex condition with multifaceted origins, is closely linked to heightened cardiovascular risk. This investigation focused on the intricate relationship between micronutrient levels, oxidative stress, metabolic syndrome (MetS), and their combined influence on factors contributing to cardiovascular risk. Objectives: The main goal was to examine and contrast the levels of micronutrients and markers of oxidative stress in individuals with MetS against a healthy control group. Additionally, the research sought to analyze novel markers indicative of cardiovascular risk in these cohorts and to determine how these biochemical factors correlate with standard markers of MetS. Methods: In this cross-sectional comparative study, 200 individuals were equally divided into groups of MetS patients and healthy controls at MES Medical College and Hospital in Kerala. The study involved measuring anthropometric variables and assessing serum concentrations of micronutrients like Magnesium, Zinc, and Copper alongside oxidative stress indicators (Malondialdehyde [MDA] and Vitamin C) and newly recognized markers of cardiovascular risk (LpPLA2 and hs-CRP). Established markers of MetS were also evaluated. Results: Individuals with MetS showed notably higher body mass index (BMI) and waist circumference than the control group. Analysis of micronutrients indicated diminished levels of Zinc and Copper in the MetS cohort. Markers of oxidative stress, namely elevated MDA and decreased Vitamin C levels, were observed in the MetS group. Additionally, the MetS patients exhibited increased levels of LpPLA2 and hs-CRP, signaling heightened cardiovascular risk. The research further noted intricate interrelations between these biochemical markers and traditional indicators of MetS. Conclusion: This research emphasizes the vital link between obesity and metabolic syndrome, highlighting the critical role of micronutrient deficiencies and oxidative stress in the underlying mechanisms of the disease. The increased levels of LpPLA2 and hs-CRP among MetS patients point to a greater risk of cardiovascular complications, underscoring the necessity for an inclusive management approach for MetS. These findings support the integration of micronutrient and oxidative stress evaluation into the routine clinical assessment of MetS, in conjunction with monitoring established and emerging cardiovascular risk markers. Future studies should adopt longitudinal designs to delve deeper into the cause-and-effect relationships and assess the impact of specific interventions targeting these areas

Confronting system barriers for ST- elevation MI in low and middle income countries with a focus on India

© 2017 Our previous research found seven specific factors that cause system delays in ST-elevation Myocardial infarction management in developing countries. These delays, in conjunction with a lack of organized STEMI systems of care, result in inefficient processes to treat AMI in developing countries. In our present opinion paper, we have specifically explored the three most pertinent causes that afflict the seven specific factors responsible for system delays. In doing so, we incorporated a unique strategy of global STEMI expertise. With this methodology, the recommendations were provided by expert Indian cardiologist and final guidelines were drafted after comprehensive discussions by the entire group of submitting authors. We expect these recommendations to be utilitarian in improving STEMI care in developing countries

Non drowsy obstructive sleep apnea as a potential cause of resistant hypertension: a case report

<p>Abstract</p> <p>Background</p> <p>Obstructive sleep apnea (OSA) and arterial hypertension (AH) are common and underrecognized medical disorders. OSA is a potential risk factor for the development of AH and/or may act as a factor complicating AH management. The symptoms of excessive daytime sleepiness (EDS) are considered essential for the initiation of continuous positive airway pressure (CPAP) therapy, which is a first line treatment of OSA. The medical literature and practice is controversial about the treatment of people with asymptomatic OSA. Thus, OSA patients without EDS may be left at increased cardiovascular risk.</p> <p>Case presentation</p> <p>The report presents a case of 42year old Asian woman with symptoms of heart failure and angina like chest pain upon admission. She didnt experience symptoms of EDS, and the Epworth Sleepiness Scale was seven points. Snoring was reported on direct questioning. The patient had prior medical history of three unsuccessful pregnancies complicated by gestational AH and preeclampsia with C-section during the last pregnancy. The admission blood pressure (BP) was 200/120mm Hg. The patients treatment regimen consisted of five hypotensive medications including diuretic. However, a target BP wasnt achieved in about one and half month. The patient was offered to undergo a polysomnography (PSG) study, which she rejected. One month after discharge the PSG study was done, and this showed an apnea-hypopnea index (AHI) of 46 events per hour. CPAP therapy was initiated with a pressure of 11H₂0cm. After 2months of compliant CPAP use, adherence to pharmacologic regimen and lifestyle modifications the patients BP decreased to 134/82mm Hg.</p> <p>Conclusions</p> <p>OSA and AH are common and often underdiagnosed medical disorders independently imposing excessive cardiovascular risk on a diseased subject. When two conditions coexist the cardiovascular risk is likely much greater. This case highlights a possible clinical phenotype of OSA without EDS and its association with resistant AH. Most importantly a good hypotensive response to medical treatment in tandem with CPAP therapy was achieved in this patient. Thus, it is reasonable to include OSA in the differential list of resistant AH, even if EDS is not clinically obvious.</p

The barriers and enablers to education among scheduled caste and scheduled tribe adolescent girls in northern Karnataka, South India: A qualitative study

This qualitative study explored the barriers and enablers to scheduled caste/scheduled tribe (SC/ST) adolescent girls entering into, and completing secondary education in northern Karnataka, South India. In-depth interviews were conducted with 22 adolescent girls, their respective parent/guardian (n = 22) and 11 teachers, recruited purposively from 11 villages within two districts in northern Karnataka. Multiple barriers were identified to disadvantaged caste adolescent girls’ entry into and retention in education in this setting, and these operated at the individual, family, community and school levels. In addition, some enablers to education were also described. The study highlights the importance of involving multiple stakeholders to overcome the barriers to education for SC/ST girls, and of working to change beliefs and expectations around gender norms as well as improving the quality of education in this setting

Dynamism in the solar core

Recent results of a mixed shell model heated asymmetrically by transient increases in nuclear burning indicate the transient generation of small hot spots inside the Sun somewhere between 0.1 and 0.2 solar radii. These hot bubbles are followed by a nonlinear differential equation system with finite amplitude non-homologous perturbations which is solved in a solar model. Our results show the possibility of a direct connection between the dynamic phenomena of the solar core and the atmospheric activity. Namely, an initial heating about DQ_0 ~ 10^{31}-10^{37} ergs can be enough for a bubble to reach the outer convective zone. Our calculations show that a hot bubble can arrive into subphotospheric regions with DQ_final ~ 10^{28} - 10^{34} ergs with a high speed, up to 10 km s-1, approaching the local sound speed. We point out that the developing sonic boom transforms the shock front into accelerated particle beam injected upwards into the top of loop carried out by the hot bubble above its forefront traveling from the solar interior. As a result, a new perspective arises to explain flare energetics. We show that the particle beams generated by energetic deep-origin hot bubbles in the subphotospheric layers have masses, energies, and chemical compositions in the observed range of solar chromospheric and coronal flares. It is shown how the emergence of a hot bubble into subphotospheric regions offers a natural mechanism that can generate both the eruption leading to the flare and the observed coronal magnetic topology for reconnection. We show a list of long-standing problems of solar physics that our model explains. We present some predictions for observations, some of which are planned to be realized in the near future.Comment: 44 pages, 20 figure