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Search Results: 1 - 10 of 261 matches for " RF Tadi "
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Ethical dilemmas and financial burdens faced by clinical dental students in a ‘quota-driven’ curriculum
LM Sykes, RF Tadi, JB du Plessis, T Gugushe
South African Journal of Bioethics and Law , 2010,
Abstract: Unprofessional behaviour, cheating or falsifying of information by undergraduate dental students is a serious problem, and may be a predictor of future professional board disciplinary actions against practitioners. In quota-driven curricula students have to complete a minimum number of procedures, many of which require laboratory services. In order to achieve this some students at the University of Limpopo had begun bribing technicians to complete their work preferentially, or to do part of it for them. A final-year dental student carried out an independent investigation to establish the extent of the problem so that school authorities could be alerted and requested to curb this practice. Anonymous questionnaires were given to all the clinical-year dental students, who were asked to answer as honestly as possible. Results showed that almost half of the 4th-year students (47%) and double that of 5th-years (86%) had paid technicians for special favours and services. Payment methods and amounts ranged from gifts to actual monetary reimbursement. Ninety-three per cent of students reported additional financial burdens owing to their having paid for patient treatment, transport costs, telephone calls or food, or for the actual prosthesis. Ethics courses are part of most dental curricula, but have no standard, universally accepted outline or structure. Bribery was investigated by a student who had experienced it as a problem himself, highlighting the point that students will be more engaged in ethics education when it addresses issues directly relevant to them. Faculties should therefore design dental ethics curricula that are practical and relevant to students’ experiences, and ensure these courses begin early in the dental education and span its entire duration. Faculties should also support and encourage consistent professional conduct in undergraduate students which they will hopefully continue to practise in their future professional lives as dentists..
A Semi-Analytical Method for the Solution of Helmholtz Equation  [PDF]
M. Tadi
Journal of Applied Mathematics and Physics (JAMP) , 2013, DOI: 10.4236/jamp.2013.15008

This note is concerned with a semi-analytical method for the solution of 2-D Helmholtz equation in unit square. The method uses orthogonal functions to project the problem down to finite dimensional space. After the projection, the problem simplifies to that of obtaining solutions for second order constant coefficient differential equations which can be done analytically. Numerical results indicate that the method is particularly useful for very high wave numbers.

The globalization debate: The skeptics
Tadi? Tadija
Panoeconomicus , 2006, DOI: 10.2298/pan0602179t
Abstract: A devastating criticism of a "hard core" argumentation, stemming from skeptical authors, has strongly challenged an enthusiasm noticeable in most theoretical analyses of globalization, bringing to light many "darker sides" of the globalization phenomena. A detailed critical re-examination of their often unrealistic assumptions has presented a very serious challenge to globalists and has made room for the arising of the so called "great globalization debate", which has started over time to shape the mainstream of the contemporary social philosophy. In this paper we are closely looking into the way in which skeptics realize their devastating criticism of globalists' argumentation.
The globalization debate: The globalists
Tadi? Tadija
Panoeconomicus , 2006, DOI: 10.2298/pan0601051t
Abstract: One of the main questions most of the globalization theorists have been dealing with is how to provide an adequate classification and systematization of vast and different theories of globalization. In this work we give a closer look to an infamous and highly influential Held's division of globalization theorists on globalists and skeptics. According to globalists globalization represents a real and significant historical process without a precedent, which generates new forms of global economy, global politics and global culture. On the other side, there are skeptics who discard globalization discourse simply as a myth or alternatively as an ideological project of the West. The first part of our investigation of the great globalization debate is dedicated to investigation of the globalist perspective (both the hyper-globalists and transformationists).
Jean – Werner Muller: Constitutional patriotism Princeton University Press 2007., p. 171.
Margarita Tadi
Zbornik Radova Pravnog Fakulteta u Splitu , 2011,
Fuzzy multi-criteria approach to ordering policy ranking in a supply chain
Tadi? Danijela
Yugoslav Journal of Operations Research , 2005, DOI: 10.2298/yjor0502243t
Abstract: In this paper, a new fuzzy multi-criteria mathematical model for the selection of the best among a finite number of ordering policy of raw material in a supply chain is developed. The problem treated is a part of the purchasing plan of a company in an uncertain environment and it is very common in business practice. Optimization criteria selected describe the performance measures of ordering policies and generally their relative importance is different. It is assumed that the values of the optimization criteria are vague and imprecise. They are described by discrete fuzzy numbers and by linguistic expressions. The linguistic expressions are modeled by discrete fuzzy sets. The measures of belief that one ordering policy is better than another are defined by comparing fuzzy numbers. An illustrative example is given.
Dynamic criticality in driven disordered systems: Role of depinning and driving rate in Barkhausen noise
Bosiljka Tadi
Physics , 1999, DOI: 10.1016/S0378-4371(99)00143-0
Abstract: We study Barkhausen noise in a diluted two-dimensional Ising model with the extended domain wall and weak random fields occurring due to coarse graining. We report two types of scaling behavior corresponding to (a) low disorder regime where a single domain wall slips through a series of positions when the external field is increased, and (b) large disorder regime, which is characterized with nucleation of many domains. The effects of finite concentration of nonmagnetic ions and variable driving rate on the scaling exponents is discussed in both regimes. The universal scaling behavior at low disorder is shown to belong to a class of critical dynamic systems, which are described by a fixed point of the stochastic transport equation with self-consistent disorder correlations.
Time-like graphical models
Tvrtko Tadi
Mathematics , 2013,
Abstract: We study continuous processes indexed by a special family of graphs. Processes indexed by vertices of graphs are known as probabilistic graphical models. Burdzy and Pal in their paper proposed a continuous version of graphical models -- processes indexed by time-like graphs. We construct a more general family of continuous processes on a wider family of graphs, find new properties and solve the conjecture of uniqueness of the distribution for the process indexed by graphs with infinite number of vertices. We present new results showing connections to the stochastic heat equation, Markov random fields, martingales indexed by directed sets and branching Markov processes.
Graphical structure of conditional independencies in determinantal point processes
Tvrtko Tadi
Statistics , 2014,
Abstract: Determinantal point process have recently been used as models in machine learning and this has raised questions regarding the characterizations of conditional independence. In this paper we investigate characterizations of conditional independence. We describe some conditional independencies through the conditions on the kernel of a determinantal point process, and show many can be obtained using the graph induced by a kernel of the $L$-ensemble.
Schistosomiasis epidemiology and control: how did we get here and where should we go?
Sturrock, RF;
Memórias do Instituto Oswaldo Cruz , 2001, DOI: 10.1590/S0074-02762001000900003
Abstract: although a disease of great antiquity, scientific studies of schistosomiasis began only 150 years ago. the complete life-cycle was not described until just before the first world war, making it possible at last to plan proper community control programmes. inadequate tools prevented their effective implementation until well after the second world war when new tools became available, thanks to the newly formed world health organization. molluscicides spearheaded control programmes until the late 1970s but were then replaced by the newly developed, safe drugs still used today. whatever the method used, the initial goal of eradication was, in the light of experience and cost, gradually replaced by less ambitious targets; first to stop transmission and then to reduce morbidity. the most successful programmes combined several methods to minimise reinfection after chemotherapy. comparisons between different programmes are difficult without using appropriate, standardised diagnostic techniques and the correct epidemiological measurements. some examples will be presented, mainly from our studies on schistosoma mansoni in kenya. drug resistance on a scale comparable with malaria has not occurred in schistosomiasis but the likely withdrawal of all drugs except praziquantel leaves its control extremely vulnerable to this potential problem. an effective, affordable vaccine for use in endemic countries is unlikely to be ready for at least 5 years, and developing strategies for its use could take a further decade or more, judging from experience with drugs and molluscicides. in the interim, by analogy with malaria, the most cost-effective approach would the use of drugs combined with other methods to stop transmission, including molluscicides. the cost of molluscicides needs to be reduced and fears allayed about their supposedly adverse ecological effects.
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