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Search Results: 1 - 10 of 145979 matches for " Suresh B "
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Experimental Investigations and Theoretical Modeling Aspects in Column Studies for Removal of Cr(VI) from Aqueous Solutions Using Activated Tamarind Seeds  [PDF]
Suresh Gupta, B. V. Babu
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.28081
Abstract: Continuous adsorption experiments are conducted using fixed-bed adsorption column to evaluate the performance of the adsorbent developed (from activated tamarind seeds) for the removal of Cr(VI) from aqueous solutions and the results obtained are validated with a model developed in this study. The effects of significant parameters such as flow rate, mass of adsorbent, and initial Cr(VI) concentration are studied and breakthrough curves are obtained. As the flow rate increases from 10 to 20 mL min-1, the breakthrough time decreases from 210 to 80 min. As the mass of adsorbent increases, breakthrough time gets delayed. The breakthrough times are obtained as 110, 115 and 210 min for 15, 20 and 25 g of activated tamarind seeds. As the initial Cr(VI) concentration increases from 100 to 200 mgL-1, the break point time decreases from 210 to 45 min. The process parameters for fixed-bed adsorption such as breakthrough time, total percentage removal of Cr(VI), adsorption exhaustion rate and fraction of unused bed length are calculated and the performance of fixed-bed adsorption column is analyzed. The mechanism for Cr(VI) adsorption on activated tamarind seeds is proposed. At low value of solution pH (= 1), the increase in Cr(VI) adsorption is due to the electrostatic attraction between positively charged groups of activated tamarind seeds and the HCrO4-. A mathematical model for fixed-bed adsorption column is proposed by incorporating the effect of velocity variation along the bed length in the existing model. Pore and surface diffusion models are used to describe the intra-particle mechanism for Cr(VI) adsorption. The breakthrough curve obtained theoretically from pore diffusion model and surface diffusion model are compared with experimental results for different operating conditions. The standard deviation values obtained for pore diffusion model and solid diffusion model are 0.111 and 0.214 respectively.
Review: Global economic crisis and nutrition security in Africa
B Suresh
African Journal of Food, Agriculture, Nutrition and Development , 2009,
Abstract: For nearly a decade, sound economic policies and greater external support, in the forms of debt relief and increased investment and inflows contributed to robust economic growth in many African countries. During 2007 and 2008, though, food and fuel price shocks put inordinate strains on these nations’ balance sheets, growth prospects and potential to reduce poverty. These strains have since been compounded by the global economic crisis, which now threatens to reverse the region’s more recent movement toward meeting the Millennium Development Goals [1].The global recession has effectively reduced export demand, commodity prices and foreign investment and inflows, generating negative effects on terms of trade and household incomes. These negative effects exacerbate living and working conditions in Africa that were already worsened by the food crisis. African farmers in particular have had little resources with which to respond to these crises. Poor infrastructure, poor quality seeds and soil, limited technology and investment in research and development and a lack of access to capital, among other obstacles, leave African farmers with a diminished capacity to respond to the current crisis [2]. African nations, made more vulnerable by the food and fuel crisis, now face a worsened outlook given the deeper vulnerability imposed upon them by the economic crisis’ adverse and potentially prolonged effects. This potentially dire outlook begs the question, what kinds of policies and programs are needed to protect the vulnerable? Though the experience is scanty on how to implement large scale interventions, lessons learned from other parts of the world and from past crisis might provide the first steps forward toward devising a solution.
Study materials lead to suspicion of an unnatural death—A case report  [PDF]
B. Suresh Kumar Shetty, Jagadish Rao Padubidri
Forensic Medicine and Anatomy Research (FMAR) , 2013, DOI: 10.4236/fmar.2013.14013
Abstract: The knowledge of human skeletal structure is a minimum requirement for all students who are practicing medicine. The skeletal makeup is used as a study material to acquire the knowledge of human anatomy. Skeletal study materials are obtained from the authorized markets by medical and paramedical students and teachers.The study materials are either kept at home or in their hostel rooms. After their basic medical study, they either keep safe these articles for their future reference or pass to their subordinate medical associates. The main problem arises if these skeletal structures are not disposed properly, after their study which may lead the Investigating officer to various medicolegal queries on recovery of these skeleton parts. Here is an interesting case, where the human bones were recovered by the municipality workers scattered in the garbage pit, which lead the investigating officer to register a case of unnatural death and begin with series of medicolegal query.
MITIGATING FAMINE IN SOUTHERN AFRICA - WHAT HAVE WE LEARNED FROM THE PAST?
A Bhouraskar, B Suresh
African Journal of Food, Agriculture, Nutrition and Development , 2002,
Abstract: Famine continues to threaten the livelihoods of many sub-Saharan Africans. Presently, six countries of southern Africa: Lesotho, Malawi, Mozambique, Swaziland, Zambia and Zimbabwe, are threatened by famine due to low output in the staple crop maize. Policy lessons learned from studies conducted by the International Food Policy Research Institute (IFPRI) on famine mitigation efforts in sub-Saharan Africa can be instructive in developing measures to remove the threat. Famine mitigation must be seen in terms of three goals or phases: immediate relief, recovery and short-term development. This paper presents policy options for each of these phases, including food aid, labor-intensive employment programs, public-private partnerships, agricultural input transfers and institution building. Interventions must be combined and sequenced for an overall strategy to be effective. Certain broader goals, such as governance, are also essential to consider for long-term famine prevention and food security. The paper examines a range of issues: 1) the causes of famines, the time frame for various policy measures and the criteria for choosing interventions, (2) interventions for immediate relief, (3) measures to help affected households recover from famine, (4) the development of technological, policy and institutional foundations for stepping out of famine and attaining food security, (5) how interventions should be combined and sequenced, and (6) several overarching issues that should be considered for famine mitigation and prevention. (Af. J. of Food and Nutritional Sciences: 2002 2(2): 22-30)
Pujas And Festivals Of Veeranarayana Perumal Temple In Kattumannar Koil Taluk
B. SURESH KRISHNAN
Indian Streams Research Journal , 2012,
Abstract: Sri vaishnavism is as old as Hinduism and it has been extolled through the ages as the religion of redemption. It connotes the religious sect in which Vishnu is the external and pure reality. He enters into the human history to redeem the humanity from sins and selfishness and to regularise their spiritual and social life. Vaishnavism explicitly means and defines the dual function of Vishnu. It identifies Vishnu as Brahman, the god head who creates the universe.
Marginal permeability of one step self-etch adhesives: Effects of double application or the application of hydrophobic layer
Pushpa R,Suresh B
Journal of Conservative Dentistry , 2010,
Abstract: Aim : The purpose of this in vitro investigation was to evaluate the influence of double application and application of hydrophobic layer on marginal adaptation of four self-etch adhesive systems (XENOIII, ALLBONDSE, CLEARFIL SE TRI BOND, FUTURA BOND). Materials and Methods : One hundred and twenty class V cavities were prepared on intact, extracted human premolars and were divided into three groups of ten teeth each for all four adhesives. Group 1: Application of bonding agents as per manufacturer directions. Group 2: Double application of bonding agents. Group 3: Application of hydrophobic layer. The specimens were restored with composite and light cured. After thermocycling and immersion in 2% Basic Fuchsin dye solution, the teeth were sectioned and dye penetration was observed under a stereomicroscope at 20× magnification. All the samples were scored and results were analyzed using Kruskal-Wallis and Mann-Whitney tests. Results : Group 3, in which the adhesive systems were coated with hydrophobic layer, showed significantly decreased microleakage, followed by Group 1 and Group 2 for all the adhesive systems. And there is no significant different between Group 1 and Group 2. Conclusion : Marginal permeability of one-step adhesives can be minimized by the application of more hydrophobic resin layer, and the double application of one-step self-etch system can be safely performed without jeopardizing the performance of adhesives.
Impact of Information and Communication Technologies on Women Empowerment in India
Lal B. Suresh
Journal of Systemics, Cybernetics and Informatics , 2011,
Abstract: The Information and Communication Technology (ICT) revolution has not only opened up new opportunities for economic growth and social development but has also posed problems and challenges. It can shape and enhance wide range of developmental applications in agriculture, industry and social sectors and is influencing all sections of the society. ICT provides unique opportunities for human development. At the same time, ICT has been widening the gaps between and within countries, regions, gender while increasing disparities divide between the rural-urban, rich-poor, elite neglected and also within the different categories of women in various spheres of activity. It is necessary to build up women capacities to involve them in productive activities, institutional building, family and social transformation, decision-making process, political representation, trade and commerce, entrepreneurial development and social leadership. There is a need to enhance opportunities to women to enable them to own, manage and control industries and service enterprises including IT-based units. There is also need to provide more opportunities in erelated sectors to them in higher managerial, technical positions in government and non-government agencies, research, educational institutions in private and public sectors, without confining their role to only call centers, telecentres, data-entry level and lower levels in the organizations. ICT has to address to all these problems of women as a whole and has to be used to facilitate to build a women empowered society.
Methods of Solving Ill-Posed Problems
Suresh B. Srinivasamurthy
Mathematics , 2012,
Abstract: Many physical problems can be formulated as operator equations of the form Au = f. If these operator equations are ill-posed, we then resort to finding the approximate solutions numerically. Ill-posed problems can be found in the ?elds of mathematical analysis, mathematical physics, geophysics, medicine, tomography, technology and ecology. The theory of ill-posed problems was developed in the 1960's by several mathematicians, mostly Soviet and American. In this report we review the methods of solving ill-posed problems and recent developments in this ?eld. We review the variational regularization method, the method of quasi-solution, iterative regularization method and the dynamical systems method. We focus mainly on the dynamical systems method as it is found that the dynamical systems method is more effi?cient than the regularization procedure.
Binary Random Sequences Obtained From Decimal Sequences
Suresh B. Thippireddy
Computer Science , 2008,
Abstract: This paper presents a twist to the generation of binary random sequences by starting with decimal sequences. Rather than representing the prime reciprocal sequence directly in base 2, we first right the prime reciprocal in base 10 and then convert it into the binary form. The autocorrelation and cross-correlation properties of these binary random (BRD) sequences are discussed.
Nelder-Mead Based Iterative Algorithm for Optimal Antenna Beam Patterns in Ad Hoc Networks  [PDF]
Vinay B. Ramakrishnaiah, Robert F. Kubichek, Suresh S. Muknahallipatna
Journal of Computer and Communications (JCC) , 2017, DOI: 10.4236/jcc.2017.57012
Abstract: Directional antennas shape transmission patterns to provide greater coverage distance and reduced coverage angle. Use of adaptive directional antenna arrays can minimize interference while also being more energy efficient. When used in an ad-hoc network, this reduces interference among transmitting nodes and thereby increases throughput. Such “smart antennas” use digital beamforming based on signal processing algorithms to compute the appropriate weights to form effective antenna patterns. Smart antennas require the knowledge of the signal received at each antenna in the antenna array, thereby increasing the complexity of hardware and cost. Also, conventional smart antennas optimize results for each individual node, while it is preferable to have a global optimal solution. A problem that has not been addressed is how to compute individual beam patterns that maximize some measure of global network performance. Historically, the focus has been on finding node antenna patterns that give locally optimal performance. In this paper, we investigate a low hardware complexity beamforming approach aimed at improving global performance that uses average Noise-to-Signal ratio as the performance measure. Given a multi-hop route from source to destination, beam patterns are shaped to maximize average signal-to-noise ratio across all nodes on the route, which reduces bit-error rates and extends battery and network lifetime. The antenna weights are sequentially adjusted across all nodes in the route to achieve optimization across the network. By using phase-only weights, hardware costs are minimized. The performance of the algorithm using different path loss models is explored.
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