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Search Results: 1 - 10 of 7803 matches for " Gabriel Ndayisaba "
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Colorectal Cancer: Epidemiological, Clinical and Histopathological Aspects in Burundi  [PDF]
Rénovat Ntagirabiri, Richard Karayuba, Gabriel Ndayisaba, Sylvain Niyonkuru, Moebeni Amani
Open Journal of Gastroenterology (OJGas) , 2016, DOI: 10.4236/ojgas.2016.63011
Abstract: Colorectal cancer is a major cause of morbidity and mortality throughout the world. There is no study about colorectal cancer in our country. The aim of the study was to assess epidemiological, clinical, therapeutic and histological aspects of colorectal cancer over a 10-year period (1999-2008) in Kamenge university hospital, Bujumbura, Burundi, by a descriptive retrospective study. A total of 37 cases of colorectal cancer, 22 males (59.5%) and 15 females (40.5%), mean age 50.8 years, were retrieved over the period of the study. The colorectal cancer was revealed by a rectal bleeding in 21 patients (56.8%) and an occlusive syndrome in 5 patients (13.5%). All patients underwent surgery. According to Dukes’ stages: 27% were A, 27% B, 19% C and 27% stage D. Histopathologically, 18 cases (46.7%) were differentiated adenocarcinoma, 14 cases (37.8%) undifferentiated adenocarcinoma, 2 cases of lymphoma and 2 cases of leiomyosarcoma. All patients underwent surgery. The hospitalization stay was a mean of 27 days. The prognosis was poor with a mortality rate of 13.5% in the hospital. In conclusion, colorectal cancer deserves awareness as a public health problem in our country.
Esophageal Cancer: Epidemiological, Clinical and Histopathological Aspects over a 24-Years Period at Kamenge University Hospital, Bujumbura, Burundi  [PDF]
Rénovat Ntagirabiri, Richard Karayuba, Gabriel Ndayisaba, Aline Nduwimana, Jean Claude Niyondiko
Open Journal of Gastroenterology (OJGas) , 2016, DOI: 10.4236/ojgas.2016.64014
Abstract: Aim: There were no data about esophageal cancer in Burundi. The aim of the study was to highlight the epidemiological, clinical and histopathological aspects of the esophageal cancer. Method: A retrospective study over a 24-years period (from January 1988 to December 2011) was carried out at Kamenge university hospital, including patients with esophageal cancer. The cases were selected on basis of the histological evidence of the cancer. Results: A total of 34 cases were retrieved and included for analysis. Among them, 24 patients (70.5%) were males. The esophageal cancer constituted 8.6% of digestive cancers over the period of the study. The average age was 50.9 years. It was revealed by dysphagia in 32 patients (94.1%) and was concomitantly metastatic in 12 patients. The squamous cell carcinoma was 30 cases (88.2%). 27 patients underwent a curative resection, but the outcome and prognosis were poor. In-hospital mortality and morbidity rates were respectively 8.8% and 17.7%. Conclusion: The present study showed evidence that the esophageal cancer in our country had the same characteristics and distribution as well as in developing countries. It had a poor prognosis and efforts had to be done in the early cancer detection.
Phenolic Compound Profiles of Two Common Beans Consumed by Rwandans  [PDF]
Owino Joseph, Mukashyaka Phelomene, Ndayisaba Helene, Habimana Valens, Ongol Martin Patrick, Dil Thavarajah, Pushparajah Thavarajah
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.520310
Abstract: Legumes are high-protein, medium-energy and micronutrient-rich food consumed in many parts of the world including Africa. This study evaluated the levels of specific phenolic compounds in three legumes. Two varieties of the common bean, (Phaseolus vulgaris L.) soybeans (Glycine max L.), and peas (Pisum sativum L.) from Rwanda were analyzed using high performance liquid chromatography with diode array detection. The phenolic compounds were identified by comparison to the chromatographic retention times and UV spectra of known reference compounds. This study results clearly shows the presence of 11 different phenolic compounds in common beans: gallic acid, (+)-catechin, (–)-epicatechin, caffeic acid, o-coumaric acid, chlorogenic acid, quercetin, 4-hydrobenzoic acid, syringic acid, ferulic acid and vanillic acid. The concentration ranged from 0.59 to 2.27 mg/kg for epicatechin. High levels of catechin (13.5 to 57.9 mg/kg) ferulic acid (26.1 to 47.6 mg/kg) were also observed. Therefore, the results of this study show that Rwandan common beans are a good source of phenolic acids in particular catechins and ferulic acid.
Zeroing in on AIDS and global health Post-2015
Kent Buse, Ruth Blackshaw, Marie-Goretti Ndayisaba
Globalization and Health , 2012, DOI: 10.1186/1744-8603-8-42
Abstract: This Viewpoint argues that today’s rapidly changing world, including its shifting geo-political and economic landscape, requires policy responses that are context-sensitive. We highlight the Shared Responsibility-Global Solidarity agenda, as pioneered by the African Union in its recent Roadmap on AIDS, tuberculosis, and malaria, to illustrate ways in which global health can be re-thought to tackle twenty-first century challenges. In light of the emerging debate on what a Post-2015 development agenda and accountability framework should look like, we argue that the AIDS response offers lessons as a pathfinder which can pave the way for global health responses in which the most marginalised are at the centre of the debate, human rights are protected under the rule of law, strong accountability is in place for results for people, and community and participatory processes are the norm. These hard-learned and -won principles of the AIDS response are critical if we are to realize a world in which there is zero inequality and health justice for all.December 1st marks World AIDS Day with the theme ‘Getting to zero’. Three short years ago, UNAIDS articulated what was then considered to be an ambitious vision – the aspiration for zero new HIV infections, zero discrimination and zero-AIDS related deaths. As we imagine the Post-2015 development agenda, we now can and should reconceptualise this vision as a set of concrete goals.In 2011, for the first time in the history of the AIDS response, the number of people receiving antiretroviral therapy in low- and middle-income countries (just over 8 million) outweighed those needing treatment, but without access [1]. With the number of people newly acquiring HIV continuing to decline, alongside progress in the scale-up of treatment coverage and evidence of the effectiveness of treatment for prevention, achieving the ‘three zeroes’ in the coming years is possible. Indeed, at the 2012 XIX International AIDS Conference in Washington, a nu
The Mind-Body Problem Today  [PDF]
Gabriel Vacariu
Open Journal of Philosophy (OJPP) , 2011, DOI: 10.4236/ojpp.2011.11005
Abstract: An old philosophical problem, the mind-body problem, has not been yet solved by philosophers or scientists. Even if in cognitive neuroscience has been a stunning development in the last 20 years, the mind-body problem remained unsolved. Even if the majority of researchers in this domain accept the identity theory from an ontological viewpoint, many of them reject this position from an epistemological viewpoint. In this context, I consider that it is quite possible the framework of this problem to be wrong and this is the main reason the problem could not be solved. I offer an alternative, the epistemologically different worlds perspective, that replace the world or the universe. In this new context, the mind-body problem becomes a pseudo-problem.
Analysis of Dynamics Fields in Noninertial Systems  [PDF]
Gabriel Barceló
World Journal of Mechanics (WJM) , 2012, DOI: 10.4236/wjm.2012.23021
Abstract: In this paper, I present evidence that there exists an unstructured area in the present general assumptions of classical mechanics, especially in case of rigid bodies exposed to simultaneous noncoaxial rotations. To address this, I propose dynamics hypotheses that lead to interesting results and numerous noteworthy scientific and technological applications. I constructed a new mathematical model in rotational field dynamics, and through this model, results based on a rational interpretation of the superposition of motions caused by torques were obtained. For this purpose, I analyze velocity and acceleration fields that are generated in an object with intrinsic angular momentum, and assessed new criteria for coupling velocities. In this context, I will discuss reactions and inertial fields that cannot be explained by classical mechanics. The experiments have been analyzed and explained in a video accompanying this text. I am not aware of any concurrent study on the subject and conclusions evidenced in this paper, preventing us from making additional theoretical com- parisons or indicate to the reader other sources to compare criteria.
Proposal of New Criteria for Celestial Mechanics  [PDF]
Gabriel Barceló
International Journal of Astronomy and Astrophysics (IJAA) , 2013, DOI: 10.4236/ijaa.2013.34044

Based on a new interpretation on the behavior of rigid bodies exposed to simultaneous non-coaxial rotations, we have developed a hypothesis: the Theory of Dynamics Interactions, which can be applied to understand celestial mechanics. We have analyzed the velocity and acceleration fields generated in a rigid body with intrinsic angular momentum, when exposed to successive torques, to assess new criteria for this speeds coupling. In this context, reactions and inertial fields take place, which cannot be justified by means of classical mechanics. We believe that the results obtained after the analysis of dynamics fields systems accelerated by rotation will allow us to conceive a new perspective in celestial dynamics, astrometry, stellar dynamics and galactic astronomy, unknown up to date. After carrying out ample research, we have come to the conclusion that there still exists an unstructured scientific area under the present general assumptions and, more specifically, in the area of dynamic systems submitted to rotational accelerations. The aim of this paper is to present information of the surprising results obtained, and to attract the interest towards the investigation of this new area of knowledge in rotational non-inertial dynamics, and its multiple and remarkable scientific applications.

YintelligenceTM: The Mapping of the Pre-Heaven or FuXi Hexagrams to the Post-Heaven or King Wen Hexagrams  [PDF]
Gabriel Felley
Chinese Studies (ChnStd) , 2013, DOI: 10.4236/chnstd.2013.24032
Abstract: The Yijing易經belongs to the famous group of the five classics. In the Ming and Qing dynasties, the Four Books and Five Classics四書五經 were the subject of mandatory study by those Confucian scholars who wished to become government officials. The Yijing (Faure & Javary, 2002) consists of 64 figures called hexagrams 卦 formed by six Yin (broken) or Yang (unbroken) lines and commentaries on each of these hexagrams and their lines. The whole set of the hexagrams and their interdependencies make a dynamic model for the understanding or the anticipating of the different steps change goes through. The Yijing does not predict the future but gives a snap-shot of the actual situation and the holistic potentialities which may be deployed or not in order to better adapt to the on-going change. The different stages of a change are explained by the Yin-Yang polarity and the never-ending transformation of old-Yin 老陰in young-Yang少陽, old-Yang老陽, young-Yin少陰 and old-Yin again. The 64 hexagrams are built by pairing the 8 basic trigrams obtained by adding to each bigram a supplementary Yin or Yang line. Figure 1 depicts a 4-regions space (East/young Yang, South /old Yang, West/young Yin, North/old Yin) and a cyclic movement. A forthcoming article will explain the relation between this space organization and the whole set of 64 hexagrams as a network. The cyclic change is of major interest. Purpose: The 64 hexagrams of the Yijing are organized in 16 “first degree” nuclear families (Javary, 1997), which may be consolidated in 4 “second degree” nuclear families. There are another 16 families organizing the 64 hexagrams in a different structure. In the literature they are called the pre-heaven先天 hexagrams (Schlumberger, 1987), and in this paper they are referred to as the FuXi伏羲 hexagrams. They form 16 cyclic families, whose structure will be analyzed in this paper. This cyclicity induces a “predecessor-successor” relationship between the hexagrams belonging to the same FuXi family: H1H2H3H4H1. While the 4 members of each nuclear family are centered on a “master” hexagram that corresponds to a common inner lines’ structure, each FuXi family is cyclically structured and we call the hexagrams belonging to the
Theory of Dynamic Interactions: The Flight of the Boomerang  [PDF]
Gabriel Barceló
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.27063

We propose a new interpretation of the dynamic behavior of the boomerang and, in general, of the rigid bodies exposed to simultaneous non-coaxial rotations. We have developed a new rotational non-inertial dynamics hypothesis, which can be applied to understand both the flight of the boomerang as well as celestial mechanics. The boomerang is a particularly significant, intriguing and widely known case of bodies in rotation. We have analyzed the velocity and acceleration fields generated when rigid bodies are exposed to successive torques, in order to assess new criteria for this speed coupling. In this context, reactions and inertial fields that cannot be justified by means of classical mechanics take place. Accordingly, we propose a new Theory of Dynamic Interactions. We believe that the results obtained will enable us to conceive a new perspective in dynamics, unknown to date. After carrying out ample research, we have come to the conclusion that there still exists an unstructured scientific area in non-inertial dynamics systems subject to rotational accelerations. The aim of this paper is to present information of the surprising results obtained and to attract interest in research into dynamic field systems accelerated by rotation, and the multiple and remarkable scientific applications arising thereof. We further propose the boomerang as a clear example of the application of the Theory of Dynamic Interactions.

Common Factors in International Bond Returns and a Joint ATSM to Match Them  [PDF]
Christian Gabriel
Theoretical Economics Letters (TEL) , 2014, DOI: 10.4236/tel.2014.47067

The existence of common factors in international bond markets is an important cause for modelling different term structures of interest rates jointly. This paper investigates the common factors of US and UK treasury yields in the period of 1983 to 2012. A principal component analysis motivates the type of joint ATSM for modelling the yield curves of two distinct economies. In sum, two common factors explain 85% of the yield variation and the model factors have a solid economic intuition.

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