120 research outputs found
Evaluation of the efficacy of different intracanal medicaments against Candida albicans and Enterococcus faecalis - An In-Vitro study
No full textAim: This study aims to evaluate the antimicrobial efficacy of certain intracanal medicaments against Candida albicans and Enterococcus faecalis. Methods: Freshly extracted 120 single rooted mandibular premolars were selected for the study. Teeth were decoronated and cleaning and shaping was done up to F3 universal protaper system and were divided mainly into two groups: Candida albicans (C. albicans) (n = 60) and Enterococcus faecalis (E. faecalis) (n = 60). The medicaments include: G1: chlorhexidine + calcium hydroxide, G2: sodium hypochlorite + calcium hydroxide, G3: 2% chlorhexidine gel, G4: octenisept, G5: 0.1% octenisept solution + calcium hydroxide, and G6: physiologic saline (n = 5). Teeth were contaminated with Enterococcus faecalis and Candida albicans which were cultured, respectively, in brain heart infusion and Sabouraud's dextrose agar for 21 days followed by intracanal medication and colony forming units were counted on the second and seventh day. Statistical analysis was done using Analysis of Variance (ANOVA) and Tukey's post hoc test. Results: Against C. albicans, CHX + CH, 2% CHX gel, 0.1% octenidine (OCT) gel and OCT + CH showed statistically significant differences on the 2nd and 7th day. But against Enterococcus faecalis, only 0.1% OCT gel and 2% CHX gel showed statistically significant differences on the 2nd and 7th day. Among all the groups, 0.1% OCT gel and 2% CHX gel showed predominant antimicrobial efficacy. Conclusion: From the limitations of the current study, all the medicaments showed antimicrobial effect against Candida albicans and Enterococcus faecalis on the 2nd and 7th day with higher microbial inhibition on the 7th day
The fractional metric dimension of graphs
No full textAbstractA vertex x in a connected graph G is said to resolve a pair {u,v} of vertices of G if the distance from u to x is not equal to the distance from v to x. A set S of vertices of G is a resolving set for G if every pair of vertices is resolved by some vertex of S. The smallest cardinality of a resolving set for G, denoted by dim(G), is called the metric dimension of G. For the pair {u,v} of vertices of G the collection of all vertices which resolve the pair {u,v} is denoted by R{u,v} and is called the resolving neighbourhood of the pair {u,v}. A real valued function g:V(G)→[0,1] is a resolving function of G if g(R{u,v})≥1 for any two distinct vertices u,v∈V(G). The fractional metric dimension of G is defined as dimf(G)=min{|g|:g is a minimal resolving function of G}, where |g|=∑v∈Vg(v). In this paper we study this parameter
Democracy and the politics of social citizenship in India
No full textWhy do some pro-poor democracies in global South enact generous and universal social policies accompanied by empowering outcomes while others, similar in many ways, do not? If lower-class integration and programmatic commitment steers policy outcomes to be more egalitarian, what explains the variance in redistributive commitment within the cluster of radical democracies? These questions are examined in the context of two celebrated cases of pro-poor reform in the developing world: the Indian states of Kerala and West Bengal. Despite a host of similar background conditions (democratic framework, programmatic political parties, strong labor unions, and a high degree of subordinate-class integration), the cases display considerable variation in their redistributive commitment. Using the comparative-historical method, this dissertation seeks to explain the variance.
It argues that the welfare divergences of Kerala and West Bengal are a function of their divergent modes of lower-class integration. In Kerala, a radical-mobilizational mode of lower-class integration has organized the poorer sections of the working classes—landless laborers and informal sector workers—in autonomous class organizations. This has enabled them to vigorously assert their interests within the working-class movement and harness state power to advance their interests through a wide range of legislative protections and statutory entitlements. In contrast, a clientelist-corporatist mode of lower-class integration in West Bengal relies on dependent mobilization of the poorer sections, without effective self-representing class organizations and without the strategic capacity to pursue class action independent of middle-class collaborators. These distinct modes of lower-class integration engender qualitatively different state-poor relationships and, in turn, divergent visions of social citizenship. The origins of these distinct modes are then traced to their historical and peculiar patterns of class formation, class struggle, and class compromise. This dissertation provides nuance to the welfare-state literature by proposing analytical differentiation within a subset of radical democracies and then by specifying the conditions under which lower-class power and state power can be harnessed to create more redistributive and empowering social outcomes in the global South. It also makes a contribution in linking agrarian labor movements to the nature of welfare regimes and more broadly to social citizenship.Doctor of Philosoph
Asymmetric Volatility of the Indian Stock Market and Foreign Portfolio Investments : An Empirical Study
No full textHigh-Temperature Reliability of Copper Wire-Bonded Packages Encapsulated with Mold Compounds Containing Sulfur Compounds
No full textComparison of the Mechanical Characteristics of Titanium and Stainless Steel Miniplates Before and After Repeated Cycles of Autoclaving: An Invitro Study
No full textBACKGROUND:
Osteosynthesis is the process by which the facial bone discontinuity caused due to fracture are stabilized thereby ensuring an early recovery of the function. Rigid bone fixation using miniplates is the most advanced and a successful approach adopted in the field of oral and maxillofacial surgery. The most commonly used miniplates for rigid bone fixation are stainless steel and titanium miniplates. Both the type of miniplates have got different mechanical properties and advantages and disadvantages over the other. Sterilization is the final process before placing the miniplates in the host. Repeated cycles of autoclave sterilization of the miniplates may affect the mechanical properties of the miniplates.
AIMS AND OBJECTIVES:
The aim of this study is to find out whether there are any significant differences in the mechanical properties between the titanium alloy and stainless steel after undergoing periodic repeated cycles of autoclaving and to estimate which metal has the ability to withstand the no of repeated cycles of sterilization without undergoing much changes in their mechanical characteristics.
MATERIALS AND METHODS:
This is a prospective study which consists of a total of 36 samples (18 stainless steel and 18 titanium miniplates). Comparative analysis of the mechanical characteristics of titanium and stainless steel mini plates are done for 6 samples before autoclaving and 32 samples after repeated cycles of autoclaving.
Autoclaving is done at intervals of 10, 20,30, 40 and 50 cycles. The miniplates are kept in sterilization pouch and autoclaved at 1340C and 2.0 bar (30psi) of pressure for 20 minutes and is then sent to lab for destructive test assays. The results were obtained and were statistically analyzed.
RESULTS:
The obtained results showed that there was difference in the properties among stainless steel and titanium miniplates following autoclaving. There were changes in the values among the groups which showed that the number of cycles of autoclaving had impact on the properties. The hardness test revealed that titanium was harder than stainless steel with increasing number of autoclaving cycles. Due to their lesser hardness and higher ductility the stainless steel had good tensile strength. Although there was mild variation in the values obtained for flexural strength among stainless steel and titanium miniplates, the mean value obtained revealed that stainless steel had better flexural strength than that
of titanium after repeated cycles of autoclaving.
CONCLUSION:
The destructive analysis test showed that there were changes in the mechanical properties of the titanium and stainless steel before and after repeated cycles of autoclaving. Comparison between titanium and stainless steel revealed that titanium was harder that stainless steel, while stainless steel had better flexural and tensile strength when compared to titanium before and after repeated cycles of autoclaving. Thus it is concluded that both stainless steel and titanium are used for their individual mechanical properties and that repeated cycles of autoclaving has got some effects on the mechanical properties of miniplates
To investigate the causes of Chief Executive Officer (CEO) turnover in Australian health services and to devise a CEO retention model
No full textSubmitted in partial fulfillment of the requirements for the degree of Doctorate of Public Health to the School of Psychology and Public Health, La Trobe University, Victoria, Australia.</p
A statistical investigation into the properties and dynamics of biological populations experiencing environmental variability
No full textStudent Number : 9908888R -
MSc research report -
School of Statistics and Actuarial Science -
Faculty of ScienceMuch research has been devoted towards the understanding of population behaviour.
Such understanding has often been furthered through the development of theoretical
population models. This research report explores a variety of population models and
their implications.
The implications of the various models are explored using both analytical results and
simulations. Specific aspects of population behaviour studied include gross fluctuation
characteristics and extinction probabilities for a population.
This research report starts with an overview of Deterministic Models. This is followed
by a study of Birth and Death Processes, Branching Processes and Models that
incorporate environmental variability. Finally, we study the maximum likelihood
approach to population parameter estimation. The more notable theoretical results
derived include: the development of models that incorporate the population’s history;
models that incorporate discontinuous environmental changes and the development of
a means of parameter estimation for a Stochastic Differential Equation
Fluroscopic assisted airway intubation in temporomandibular joint ankylosis: A novel technique
No full text- …
