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Search Results: 1 - 10 of 581 matches for " Romeo Ekoungoulou "
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Tree Biomass Estimation in Central African Forests Using Allometric Models  [PDF]
Romeo Ekoungoulou, Donatien Nzala, Xiaodong Liu, Shukui Niu
Open Journal of Ecology (OJE) , 2018, DOI: 10.4236/oje.2018.83014
Abstract: Quantifying the tropical forests’ carbon stocks is presently an important component in the implementation of the emerging carbon credit market mechanisms. This calls for appropriate allometric equations predicting biomass which currently are scarce. In this study, we aimed to estimate above- and below-ground biomass and carbon stocks of trees, and to identify the variation in diameter-height allometry of Ipendja mixed terra firme lowland tropical forest’s trees. The study area is located at Ipendja forest management unit (UFA), close to Dongou district (Likouala Department), in Northern Republic of Congo. This study combined forest inventory data of 1340 trees recorded from eight studied plots distributed in two sites, respectively Mokelimwaekili (i.e., Old-growth forest) and Sombo (i.e., Selective logging forest). Trees measurements were done with rectangular plots, each 25 × 200 m (i.e., 0.5 ha, 5000 m2). In eight studied plots (4 plots per site), only trees with DBH 10 cm were measured and identified. 1340 trees founded were belonged 145 species and 36 botanical families (n = 733 and
Assessing the Floristic Biodiversity and Carbon Stock in a Republic of Congo’s Forest Ecosystem  [PDF]
Donatien Nzala, Romeo Ekoungoulou, Bernadin Y. Ngoumba
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105638
Reforestation management goes through the knowledge of the tired out evolution after a forestry rest. The aim of this study was to assess biodi-versity concerning Terminalia superba Engl. & Diels and its undergrowth, and then quantify sequestered carbon stocks to appreciate the impact of reforestation on forest recovery and the enhancement of carbon stocks. The study was conducted at Bilala artificial forest in southeastern Republic of Congo, in Kouilou Department (Mayombe), close to Mvouti District with an altitude of 30 m. The floristic inventory was carried out in 9 rectangular sub-plots of 20 × 25 m each, installed in three blocks of Terminalia superba Engl. & Diels, for a total area of 0.5 ha. These blocks consisted of the 64, 31 and 20 years old plantations. Within ten sub-plots censuses, all trees with a DBH ≥5 cm were identified and measured. 51 trees of Terminalia superba Engl. & Diels and around 3007 trees in its undergrowth have been recorded belonging to 33 botanical families and 52 species. The results showed that the biomass recorded in this forest has been 275 t·ha1 and the carbon stock was 129.6 t·ha1. Terminalia superba Engl. Diels had for itself a biomass of 181.42 t·ha1 out of the 275 t·ha1 quantified. The amount of CO2 captured in the atmosphere by the recorded floristic procession deducted from this carbon stock was 475.89 tons of CO2, with an economic value equal to US$ 2379.45 or XAF 1,413,278. This study demonstrated that the forestry method of reforestation has a positive impact on biodiversity recovery and carbon sequestration.
Tree Allometry in Tropical Forest of Congo for Carbon Stocks Estimation in Above-Ground Biomass  [PDF]
Romeo Ekoungoulou, Xiaodong Liu, Jean Jo?l Loumeto, Suspense Averti Ifo, Yannick Enock Bocko, Fleury Edgard Koula, Shukui Niu
Open Journal of Forestry (OJF) , 2014, DOI: 10.4236/ojf.2014.45052
Abstract: The research was aimed to estimate the carbon stocks of above-ground biomass (AGB) in Lesiolouna forest in Republic of Congo. The methodology of Allometric equations was used to measure the carbon stock of Lesio-louna tropical rainforest. The research was done with six circular plots each 40 m of diameter, with a distance of 100 m between each plot, depending on the topography of the site of the installation of these plots. The six studied plots are divided in two sites, which are: Iboubikro and Ngambali. Thus, in the six plots, there are three plots in Iboubikro site and three plots in Ngambali site. The results of this study show that the average carbon stock of aboveground biomass (AGB) in six plots was 170.673 t C ha-1. So, the average of carbon stock of aboveground biomass (ABG) in Iboubikro site was 204.693 t C ha-1 and in the Ngambali site was 136.652 t C ha-1. In this forest ecosystem, the high stock of carbon was obtained in Plot 3, which was in Iboubikro site. Plot 3 contains 20 trees and an average DBH of 24.56 cm. However, the lowest carbon stock was obtained in Plot 4, which was in Ngambali site. Also, Plot 4 contains 11 trees and an average DBH of 31.86 cm. The results of this research indicate that, the forests in the study area are an important carbon reservoir, and they can also play a key role in mitigation of climate change.
Dynamic and Configurational Approach to the Glass Transition by Nanoscale Cooperativity  [PDF]
G. Romeo
Open Journal of Biophysics (OJBIPHY) , 2012, DOI: 10.4236/ojbiphy.2012.23012
Abstract: Here we examine the findings obtained for disaccharide/water mixtures near glass transition that involves cooperative relaxation features on kinetic by viscosity and on thermodynamic behaviour by neutron scattering. Then to address cooperative phenomena that mitigate the Debye-Waller behaviour we invoke Adam-Gibbs’ idea of a cooperative rearranging region. Neutron results suggest that the excess mean square displacement behaves as free volume and is closely connected to an elementary step of the structural relaxation. Then viscosity data evidence a breakdown of the Einstein-Debye relation, decoupling attributed to the intermolecular cooperativity.
Bioethics and the Law in Familial Cancer, a Practical Approach  [PDF]
Azua-Romeo Javier
Open Journal of Pathology (OJPathology) , 2012, DOI: 10.4236/ojpathology.2012.22009
Abstract: Hereditary cancers are the result of germline mutations in specific genes that increase susceptibility to cancer. This susceptibility is spread among family members according to different patterns of inheritance. Inherited susceptibility to cancer, does not imply the certainty of developing it in all cases. In this sense many questions have come out in recent years, not only in the medical sense but also in the field of bioethics and the law.
A simple model of energy expenditure in human locomotion
Romeo, F;
Revista Brasileira de Ensino de Física , 2009, DOI: 10.1590/S1806-11172009000400008
Abstract: a simple harmonic oscillator model is proposed to describe the mechanical power involved in human locomotion. in this framework, by taking into account the anthropometric parameters of a standard individual, we are able to calculate the speed-power curves in human walking. the proposed model accounts for the well known margaria's law in which the cost of human running (independent from the speed) is fixed to 1 kcal/(kg km). the model includes the effects of a gentle slope (either positive or negative) and the effect due to the mechanical response of the walking surface. the model results obtained in the presence of a slope are in qualitative agreement with the experimental data obtained by a. leonardi et al.
Main Sources of Funding Necessary to Implement the Regional Policy in the EU
Romeo Ionescu
Acta Universitatis Danubius : Relationes Internationales , 2008,
Abstract: The paper deals with the impact of the European Structural Instruments on Member States’economies. For the beginning, we presented the role of these financial instruments and thestrategically objectives of the European regional policy which can achieve by using them. We focusedon the actual financial perspective, 2007-2013, in order to explain the evolution of the objectives ofregional policy. The last part of the paper deals with the Romania’s situation connected with thesefinancial instruments.
Romeo Asiminei
Revista de Economie Sociala , 2012,
Abstract: Articolul i propune o succint trecere n revist a istoriei defini ilor economiei sociale la nivel european, o fundamentare ideologic a conceputului i analiza unor dimensiuni esen iale pentru analiza sociologic a economiei sociale. De i economia social este o realitate prezent n diferite forme n marea majoritate a comunit ilor umane, termenul nu are o defini ie unanim acceptat n spa iul interna ional i nici m car n spa iul european, ncerc rile de definire, delimitare i teoretizare ale conceptului fiind relativ noi n raport cu practica. Acest articol este o dezvoltare a delimit rii conceptuale realizate n cadrul raportului de deschidere Profit pentru oameni” din cadrul proiectului POSDRU Modelul economiei sociale n Romania.
Romeo Asiminei
Revista de Economie Sociala , 2012,
Abstract: The article offers a brief overview of the history of definitions of social economy at European level, the ideological background of the concept and highlights some key dimensions for sociological analysis of social economy. Although the social economy is a reality present in different forms in most human communities, the term has no universally accepted definition nor in international area or in Europe. Attempts of defining and theorizing of the concept is relatively new in relation to practice. This article is a development of conceptual framework chapter from the report “Profit to the people”, POSDRU project Social Economy Model in Romania.
The influence of parasites on harmful insects of the deciduous forests of the north of Arge county
Romeo Retevoi
Advances in Environmental Sciences , 2012,
Abstract: This article presents a study on the parasites of harmful insects of the acacia and oak forests from the superior basin of Doamnei river.Between 2008-2011, we identified in these forests the following species of harmful insects which have significantly multiplied: Parectoparobiniella, Phylonorycter robiniella, Andricus quercuscalicis. The dynamics of pests populations was influenced both by abiotic factors andby the action of parasites.
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