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Search Results: 1 - 10 of 1836 matches for " Manuela Grippa "
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Relation between Seasonally Detrended Shortwave Infrared?Reflectance Data and Land Surface Moisture in Semi?Arid Sahel
J?rgen L. Olsen,Pietro Ceccato,Simon R. Proud,Rasmus Fensholt,Manuela Grippa,Eric Mougin,Jonas Ard?,Inge Sandholt
Remote Sensing , 2013, DOI: 10.3390/rs5062898
Abstract: In the Sudano-Sahelian areas of Africa droughts can have serious impacts on natural resources, and therefore land surface moisture is an important factor. Insufficient conventional sites for monitoring land surface moisture make the use of Earth Observation data for this purpose a key issue. In this study we explored the potential of using reflectance data in the Red, Near Infrared (NIR), and Shortwave Infrared (SWIR) spectral regions for detecting short term variations in land surface moisture in the Sahel, by analyzing data from three test sites and observations from the geostationary Meteosat Second Generation (MSG) satellite. We focused on responses in surface reflectance to soil- and surface moisture for bare soil and early to mid- growing season. A method for implementing detrended time series of the Shortwave Infrared Water Stress Index (SIWSI) is examined for detecting variations in vegetation moisture status, and is compared to detrended time series of the Normalized Difference Vegetation Index (NDVI). It was found that when plant available water is low, the SIWSI anomalies increase over time, while the NDVI anomalies decrease over time, but less systematically. Therefore SIWSI may carry important complementary information to NDVI in terms of vegetation water status, and can provide this information with the unique combination of temporal and spatial resolution from optical geostationary observations over Sahel. However, the relation between SIWSI anomalies and periods of water stress were not found to be sufficiently robust to be used for water stress detection.
The Next Generation of Leaders in No-Profit Sector  [PDF]
Manuela Morelli
Journal of Human Resource and Sustainability Studies (JHRSS) , 2016, DOI: 10.4236/jhrss.2016.41006
Abstract: Most studies define “next-generation” leaders as individuals under the age of 40 who can be held accountable to lead no-profit organizations in the decades to come. In addition to age, it is determinant to consider the diversity of future leaders. A successful strategy model developed for use with no-profit organizations focuses the attention of managers on three key issues: social value to be created, sources of legitimacy and support for the organization, as well as operational capacity to deliver the value. These principles can be translated into a relevant and innovative formula as follows: L (leadership) = D (diversity) * SC (Social Value) where social value reflects the importance of working with the aim to improve the society we live in.
Less rain, more water in ponds: a remote sensing study of the dynamics of surface waters from 1950 to present in pastoral Sahel (Gourma region, Mali)
J. Gardelle, P. Hiernaux, L. Kergoat,M. Grippa
Hydrology and Earth System Sciences (HESS) & Discussions (HESSD) , 2010,
Abstract: Changes in the flooded area of ponds in the Gourma region from 1950 to present are studied by remote sensing, in the general context of the current multi-decennial Sahel drought. The seasonal and interannual variations of the areas covered by surface water are assessed using multi-date and multi-sensor satellite images (SPOT, FORMOSAT, LANDSAT-MSS, –TM, and -ETM, CORONA, and MODIS) and aerial photographs (IGN). Water body classification is adapted to each type of spectral resolution, with or without a middle-infrared band, and each spatial resolution, using linear unmixing for mixed pixels of MODIS data. The high-frequency MODIS data document the seasonal cycle of flooded areas, with an abrupt rise early in wet season and a progressive decrease in the dry season. They also provide a base to study the inter-annual variability of the flooded areas, with sharp contrasts between dry years such as 2004 (low and early maximal area) and wetter years such as 2001 and 2002 (respectively high and late maximal area).The highest flooded area reached annually greatly depends on the volume, intensity and timing of rain events. However, the overall reduction by 20% of annual rains during the last 40 years is concomitant with an apparently paradoxical large increase in the area of surface water, starting from the 1970's and accelerating in the mid 1980's. Spectacular for the two study cases of Agoufou and Ebang Mallam, for which time series covering the 1954 to present period exist, this increase is also diagnosed at the regional scale from LANDSAT data spanning 1972–2007. It reaches 108% between September 1975 and 2002 for 91 ponds identified in central Gourma. Ponds with turbid waters and no aquatic vegetation are mostly responsible for this increase, more pronounced in the centre and north of the study zone. Possible causes of the differential changes in flooded areas are discussed in relation with the specifics in topography, soil texture and vegetation cover over the watersheds that feed each of the ponds. Changes in rain pattern and in ponds sedimentation are ruled out, and the impact of changes in land use, limited in the area, is found secondary, as opposed to what has often been advocated for in southern Sahel. Instead, major responsibility is attributed to increased runoff triggered by the lasting impact of the 1970–1980's droughts on the vegetation and on the runoff system over the shallow soils prevailing over a third of the landscape.
Less rain, more water in ponds: a remote sensing study of the dynamics of surface waters from 1950 to present in pastoral Sahel (Gourma region, Mali)
J. Gardelle,P. Hiernaux,L. Kergoat,M. Grippa
Hydrology and Earth System Sciences Discussions , 2009,
Abstract: Changes in the flood regime of ponds in the Gourma region from 1950 to present are studied by remote sensing, in the general context of the current multi-decennial Sahel drought. The seasonal and interannual variations of the areas covered by surface water are assessed using multi-date and multi-sensor satellite images (SPOT, FORMOSAT, LANDSAT-MSS, -TM, and -ETM, CORONA, and MODIS) and aerial photographs (IGN). Water body classification is adapted to each type of spectral resolution, with or without a middle-infrared band, and each spatial resolution, using linear unmixing for mixed pixels of MODIS data. The high-frequency MODIS data document the seasonal cycle, with an abrupt rise early in wet season and a progressive decrease in the dry season. They also provide a base to study the inter-annual variability of the flood regime, with sharp contrasts between dry years such as 2004 (low and early maximal area) and wetter years such as 2001 and 2002 (respectively high and late maximal area). The highest water level reached annually greatly depends on the volume, intensity and timing of rain events. However, the overall reduction by 20% of annual rains of the current period, compared to the 50' and 60', is concomitant with an apparently paradoxical large increase in the area of surface water, starting from the late 1980's. Spectacular for the two study cases of Agoufou and Ebang Mallam, for which time series covering the 1954-present period exist, this increase also reaches 98% between 1975 and 2002 for 92 ponds identified in central Gourma. Ponds with turbid waters and no aquatic vegetation are responsible for this increase, more pronounced to the north of the study zone. Possible causes of this change in surface water volume and regime are discussed based on differential changes in ponds dynamics related to the specifics in topography, soil texture and vegetation cover over the watershed. Changes in rain pattern and in ponds sedimentation are ruled out, and the impact of changes in land use, limited in the area, is found secondary, as opposed to what has often been advocated for in cultivated Sahel. Instead, major responsibility is attributed to increased runoff triggered by the lasting impact of the 1970–1980's droughts on the vegetation and on the hydric system over shallow soils.
The Draw-a-Family Picture Test (DAFPT): A New Projective Test for Children  [PDF]
Manuela Policarpio-Gutierrez
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.68013
Abstract: The Draw-a-Family-Picture-Test (DAFPT) is a new projective test instrument developed to facilitate understanding of children. It comes with a guide for administration and interpretation. Evaluation of the test revealed that it is generally very fit for determining children’s attitude, fears, needs, maturity level, stressors, gender tendencies and self-perception in relation to their family and significant others. Wide use of the instrument is therefore encouraged. Nonetheless, as the researcher believes that perfection can only be attained through time and modifications, it is suggested that this test be subjected for further study and necessary improvement if ever.
Compara??o entre métodos de estimativa da evapotranspira??o de referência (ETo) na regi?o Norte Fluminense, RJ
Mendon?a, José C.;Sousa, Elias F. de;Bernardo, Salassier;Dias, Gutemberg P.;Grippa, Sidney;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2003, DOI: 10.1590/S1415-43662003000200015
Abstract: the aim of this research paper was to make a comparison between the reference values of crop evapotraspiration acquired through the lysimeter and the fao-modified penman-monteith, solar radiation, makkink, linacre, jensen-haise, hargreaves-samani, pan "class a"and modified seei atmometer methods. data was obtained from the meteorological station at pesagro-rio, located at campos dos goytacazes in the state of rio de janeiro state, brazil. results have shown that for the northern region of rio de janeiro, the methods tend to be well adjusted to the reference values of the crop evapotranspiration as to those obtained through the lysimeter. nonetheless, good adjustments were obtained for intervals longer than seven-day periods when using the indirect and evaporimeter methods.
Express?o sexual do mamoeiro sob diferentes laminas de irriga??o na Regi?o Norte Fluminense
Almeida, Frederico Terra de;Marinho, Cláudia Sales;Souza, Elias Fernandes de;Grippa, Sidney;
Revista Brasileira de Fruticultura , 2003, DOI: 10.1590/S0100-29452003000300005
Abstract: imperfect flowers occurrence in hermaphrodite plants of papaya tree is related to genetic causes, which are affected by environmental factors. high humidity conditions as well as high concentration of water and nitrogen in the soil tend to change the sex of the hermaphrodite flowers producing deformed fruits. the intent of this work was studying the production behavior of flowers of hermaphrodite types of the papaya tree 'improved sunrise solo 72/12' affected by the application of different depth of water in the north region of rio de janeiro, brazil. the experiment was carried out under randomized block design with seven treatments (depth irrigation) three repetitions and five useful plants in each experimental plot. the water was applied by microsprinkler irrigation system. the treatments applied were seven percentages of the reference evapotranspiration (t1 = 0; t2 = 40; t3 = 80; t4 = 120; t5 = 160; t6 = 200 and t7 = 240% of eto). after the flower emergence the numbers of sterile flowers, carpelloid and pentandric fruits were evaluated monthly. the sterile flowers occurrence was responsible for the largest losses in the production and it was larger in the summer and become worse with the water deficit. the adoption of irrigation amount of 120% of eto, minimized the losses caused by production of imperfect flowers.
Express o sexual do mamoeiro sob diferentes laminas de irriga o na Regi o Norte Fluminense
Almeida Frederico Terra de,Marinho Cláudia Sales,Souza Elias Fernandes de,Grippa Sidney
Revista Brasileira de Fruticultura , 2003,
Abstract: O aparecimento de flores imperfeitas nas plantas hermafroditas do mamoeiro está relacionado a fatores genéticos, os quais s o afetados pelo ambiente. Condi es de alta umidade, altos teores de nitrogênio e de água no solo tendem a mudar o sexo das flores hermafroditas, produzindo frutos deformados. O objetivo deste trabalho foi estudar o comportamento do mamoeiro 'Improved Sunrise Solo 72/12', na produ o dos diferentes tipos de flores hermafroditas, em rela o à aplica o de diferentes laminas de água, na regi o Norte Fluminense. O experimento foi conduzido sob delineamento em blocos casualizados com sete tratamentos (laminas de irriga o), três repeti es e cinco plantas úteis em cada parcela experimental. Foi utilizado um sistema de irriga o por microaspers o para aplica o de água. Os níveis de irriga o aplicados foram sete percentagens da evapotranspira o de referência (T1 = 0; T2 = 40; T3 = 80; T4 = 120; T5 = 160; T6 = 200 e T7 = 240 % da ET0). Após o início do florescimento foram avaliados, mensalmente, os números de flores estéreis, de frutos carpelóides e pentandricos. A ocorrência de flores estéreis foi responsável pelas maiores perdas na produ o e foi maior no ver o e agravada pelo déficit hídrico. A ado o de uma lamina em torno de 120% da ETo minimizou as perdas pela produ o de flores imperfeitas.
Molecular Neuropathology of TDP-43 Proteinopathies
Manuela Neumann
International Journal of Molecular Sciences , 2009, DOI: 10.3390/ijms10010232
Abstract: The identification of TDP-43 as the major component of the pathologic inclusions in most forms of sporadic and familial frontotemporal lobar degeneration with ubiquitin-positive inclusions (FTLD-U) and amyotrophic lateral sclerosis (ALS) resolved a long-standing enigma concerning the nature of the ubiquitinated disease protein under these conditions. Anti-TDP-43 immunohistochemistry and the recent development of novel tools, such as phosphorylation-specific TDP-43 antibodies, have increased our knowledge about the spectrum of pathological changes associated with FTLD-U and ALS and moreover, facilitated the neuropathological routine diagnosis of these conditions. This review summarizes the recent advances in our understanding on the molecular neuropathology and pathobiology of TDP-43 in FTLD and ALS.
Women’s Voice and Religious Utterances in Ancient Greece
Manuela Giordano
Religions , 2011, DOI: 10.3390/rel2040729
Abstract: This paper tackles the issue of women and religion through a particular looking glass: religious utterances such as curses, supplication, and prayer, as reflected in some passages from ancient Greek epic and tragedy—pivotal literary genres in the ideological discourse of the Greek polis.
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