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Search Results: 1 - 10 of 81477 matches for " Liu Un Rigo "
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Testing the Week Form Efficiency of Pakistani Stock Market (2000-2010)
Abdul Haque,Hung Chun Liu,Fakhar Un Nisa
International Journal of Economics and Financial Issues , 2011,
Abstract: This empirical paper tests out the weak form efficiency of Pakistani stock market by examining the weekly index over the period . Return series has a leptokurtic and negatively skewed distribution, which is away from normal distribution as reflected by significant Jarque-Bera statistic. Estimated results of ADF (1979), PP (1988) and KPSS (1992) tests, Ljung-Box Q-Statistic of autocorrelations and runs test of randomness reject the Random Walk Hypothesis (RWH) for the returns series. Moreover the results of variance ratio test (Lo and MacKinlay (1988)) also reject the RWH and prove the robustness of other estimated results. The rejection of RWH reveals that the Pakistani stock prices are not Weak Form Efficient.
Microalbuminuria in pediatric patients with hypertension  [PDF]
Nata?a Mar?un Varda
Health (Health) , 2013, DOI: 10.4236/health.2013.54A006

Microalbuminuria in adults has been found to be an early indicator of both renal and systemic vascular disease, as well as significant cardiovascular risk predictor and therapeutic marker. Its role in essential hypertension in adults has also been well established. As diseases like hypertension and obesity have their roots in childhood and are already present in children, influencing the morbidity in adulthood, the role of microalbuminuria has been extensively investigated in children as well. Most investigations have been performed in diabetic children, confirming its clinical significance. There is also enough evidence to suggest that microalbuminuria in obese children should be taken as seriously as in children with diabetes. In children with hypertension rare studies also indicate that its presence identifies hypertensive children with higher risk, although the exact role has to be confirmed in prospective and larger studies. The mechanisms of microalbuminuria onset could be the result of renal damage secondary to hypertension or underlying renal and systemic endothelial dysfunction. Evidence from small intervention studies in children with microalbuminuria also suggests that early intervention with antihypertensive drugs is likely to be beneficial, pointing out the role of microalbuminuria as a therapeutic marker in children too. In addition, we have to stress the importance of follow-up of children with microalbuminuria, confirmation of its persistence and identification of progression. However, longitudinal prospective studies in children, investigating its future cardiovascular risk, are still lacking.

Critical Reflection about Knowledge Management in a Participatory Planning, Monitoring & Evaluation Course  [PDF]
Alberto Un Jan, Vilma Contreras
Voice of the Publisher (VP) , 2016, DOI: 10.4236/vp.2016.21001
Abstract: This article reports an initiative to manage knowledge in a Participatory Planning, Monitoring & Evaluation (PPM&E) course given at Wageningen University Research Centre (WURC), from the experience of the authors when they attended the course. The United Nations Population Fund, UNFPA [1], shows the importance of participatory monitoring and evaluation (M&E), and high- lights the difference and principles which distinguish conventional M&E from participatory M&E. For Goergens and Zall [2], vital questions are: “How will we know success when we achieve it?” and “So what?”. M&E helps answer these questions. The Royal Tropical Institute [3] works on streng- thening primary stakeholder involvement when applied to village participation in rural develop- ment. The way WURC [4] looks at PPM&E is as “Managing and Learning for Impact”. WURC focuses on M&E, and relates the application of it to manage for impact. The article shows how knowledge is managed to identify the meaning, contents and application of PPM&E, based on two versions of the PPM&E course given in 2012 and 2013 at WURC. Experiences from applying the knowledge acquired in the 2012 course, after it was ended, are presented by participants who worked on PPM&E projects. The participants confirm a useful application of the PPM&E tools. Participants at the 2012 course report applications of the course to their jobs, and mention the different tools they apply. Next, experiences during the 2013 course are presented. Emphasis is given on the use of PPM&E tools during the course; assistants are reporting initial applications. The results shown explain the benefits of attending the course, for its later application. A survey has been run by the authors to both groups to measure the usefulness of the tools explained during the course. With this annual course, WURC promotes the combination of information with experience, context, interpretation and reflection; the information about experience in PPM&E has a high value for participants and is prepared to be applied in decision making and in back home action plans prepared by the participants. In this sense, WURC contributes to knowledge management. The results shown explain the benefits of attending the course, for its later application. Also, the course explains the benefit of monitoring and evaluation, and highlights the difference and principles which distinguish “conventional monitoring & evaluation” from “participatory monitoring & evaluation”. Knowledge in PPM&E has been managed in
Hypertension in Adolescent  [PDF]
Nata?a Mar?un Varda
Health (Health) , 2016, DOI: 10.4236/health.2016.811110
Abstract: Hypertension in adolescents is, as in other patients, one of the important cardiovascular risk factors, associated with hypertension in adults and with appearance of cardiovascular complications later in life. In recent years it is in increase, in parallel with occurrence of overweight in this age group. There is mostly essential or obesity-related hypertension. It is often asymptomatic, therefore it holds true also for adolescents, that it has to be actively searched, especially in risk groups such as overweight adolescents, adolescents with positive family history or some of the other classical cardiovascular risk factors. If we have normal-weight adolescent with important hypertension or symptomatic adolescent without positive family history, the possibility of secondary hypertension has to be thinking of and extended, on possible cause focused and stepwise diagnostics performed. In this case, the treatment is etiological. Otherwise, the first-line treatment in adolescents comprises nonpharmacological treatment measures. Sometimes, because of poor nonpharmacological treatment compliance and presence of hypertensive-target organ damage, antihypertensive medications have to be introduced. However, preventive actions represent the most important task, in the form of primary and primordial prevention. In this article, diagnostic approach, prevention and treatment strategies in adolescents are shortly presented.
Intellectual Capital in a Bilingual Project between Canada and Peru  [PDF]
Alberto Un Jan, Mila Kwiatkowska
Voice of the Publisher (VP) , 2017, DOI: 10.4236/vp.2017.34005
Abstract: Thompson Rivers University (TRU), Kamloops, Canada, and Universidad Norbert Wiener (UNW), Lima, Peru, work together in a bilingual project about data mining, managing activities and resources with the help of structures in intellectual capital. Otherwise, without the use of these structures, it would have been almost impossible to have a continuous contact among the persons in the project. The change of authorities at UNW, was not an obstacle to the continuity of the project. Results of this collaboration are achieved in the way of knowledge sharing. In year 1, a team of professionals in health sciences traveled from Canada to Peru, mainly to give courses. In year 2, an expert in computer science came, together with the professionals in health; this new expert gave conferences in data mining in English language. In year 3, the expert in computer science gave a main conference and conducted workshops. Year 4 is for joint research and publishing of findings. Three results are: a) conferences and workshops in health sciences and information technology are given in Peru by Canadian experts; b) research papers are produced and published in international congresses and indexed journals; and c) a bilingual experience is given to students in Peru, since conferences and workshops are given in English to Spanish speaking students. A progressive increase in intellectual capital is measured every year during the four-year project. The research question for this paper will be: what is the contribution of intellectual capital to the management of international bilingual projects? The four-year experience, will give the answer to this research question. Outcomes already obtained show that good practices in intellectual capital are contributing to the success of this four-year project.
Coronary flow reserve in stress-echo lab. From pathophysiologic toy to diagnostic tool
Fausto Rigo
Cardiovascular Ultrasound , 2005, DOI: 10.1186/1476-7120-3-8
Abstract: Normally coronary blood flow can increase approximately four-to-six fold to meet increasing myocardial oxygen demands. This effect is mediated by vasodilation at the arteriolar bed, which reduces vascular resistance, thereby augmenting flow. The coronary reserve (CFR) represents the capacity of the coronary circulation to dilate following an increase in myocardial metabolic demands and can be expressed by the difference between the hyperemic flow and the resting flow curve (figure 1). In 1974, Lance K Gould [1] proposed the relationship between the anatomic condition and behaviour of coronary hyperaemic flow (figure2), whereby an inverse curvilinear relationship exists between the narrowing of lumen of coronary artery and hyperaemic capability, up to a completely abolished coronary reserve for stenosis >90%. This experimental paradigm can be accurately reproduced clinically in highly selected series of patients with single vessel disease, no myocardial infarction, no coronary collateral circulation, normal baseline function, no left ventricular hypertrophy, without evidence of coronary vasospasm, and off therapy at the time of testing. The perfect, predictable relationship found in the experimental animal or in a very selected patient population [2] is not so perfect in clinical practice [3,4], where many variables can modulate the imperfect match between epicardial coronary artery stenosis and coronary flow reserve (figure 2), such as the geometric characteristics of the stenosis, the presence of coronary collateral circulation, the microvascular component of coronary resistance, the presence of left ventricular hypertrophy modulating the myocardial extravascular component of coronary resistance, the viable or necrotic state of the myocardium distal to the stenosis, the presence of coronary macrovascular or microvascular spasm, and, last but not least, the presence of concomitant anti-ischemic therapy.Up to now, coronary flow reserve has been evaluated invasively i
Differential diagnosis of back pain in adult scoliosis (non operated patients)
Rigo Manuel
Scoliosis , 2010, DOI: 10.1186/1748-7161-5-s1-o44
Towards a characterization of the star-free sets of integers
Michel Rigo
Computer Science , 2001,
Abstract: Let U be a numeration system, a set X of integers is U-star-free if the set made up of the U-representations of the elements in X is a star-free regular language. Answering a question of A. de Luca and A. Restivo, we obtain a complete logical characterization of the U-star-free sets of integers for suitable numeration systems related to a Pisot number and in particular for integer base systems. For these latter systems, we study as well the problem of the base dependence. Finally, the case of k-adic systems is also investigated.
Numeration Systems: a Link between Number Theory and Formal Language Theory
Michel Rigo
Computer Science , 2012,
Abstract: We survey facts mostly emerging from the seminal results of Alan Cobham obtained in the late sixties and early seventies. We do not attempt to be exhaustive but try instead to give some personal interpretations and some research directions. We discuss the notion of numeration systems, recognizable sets of integers and automatic sequences. We briefly sketch some results about transcendence related to the representation of real numbers. We conclude with some applications to combinatorial game theory and verification of infinite-state systems and present a list of open problems.
Numeration systems on a regular language: Arithmetic operations, Recognizability and Formal power series
Michel Rigo
Computer Science , 1999,
Abstract: Generalizations of numeration systems in which N is recognizable by a finite automaton are obtained by describing a lexicographically ordered infinite regular language L over a finite alphabet A. For these systems, we obtain a characterization of recognizable sets of integers in terms of rational formal series. We also show that, if the complexity of L is Theta (n^q) (resp. if L is the complement of a polynomial language), then multiplication by an integer k preserves recognizability only if k=t^{q+1} (resp. if k is not a power of the cardinality of A) for some integer t. Finally, we obtain sufficient conditions for the notions of recognizability and U-recognizability to be equivalent, where U is some positional numeration system related to a sequence of integers.
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