Mesure de l'uranium dans un ensemble d'échantillons de formations naturelles au Maroc : implications environnementales

Measure of uranium in some samples of natural deposits in Morocco: environmental implications. In this work, we report the measurement results of uranium content in some natural formation samples in Morocco. The such results are used in several studies concerning the Earth sciences and the Environment such as geochronology, archaeology, geophysical and geophysical studies and prospecting of radioactive pollution. The analyses were carried out on some of natural deposits samples such as the corals, the fossil shells molluscs, the phosphates, the travertines, the lichens and of the impure carbonate deposits. Measurements were realized by spectrometry alpha for fossil shell molluscs, corals, travertines and impure carbonates, by Gamma spectrometry using a well detector with scintillation NaI for phosphates and by neutron activation for lichens. Isotopic 234U/238U ratio was also measured and discussed

Take Advantage of Wasteful Batang Hari Irrigation for Electricity Services Improvement

This paper describes the Batang Hari Irrigation prospect to meet the electricity needs in its surrounding area in order to increase the electrical service for every level society. The use of Batang Hari irrigation is far from its capacity. Un-used water and infrastructures from Batang Hari irrigation can be used to generate hydro-electric. Based on the results of this study, it can be concluded that the Batang Hari Irrigation can be used to generate electricity power up to 1.6 MW. This hydro power service can increase the level of electric service in West Sumatra Province more than 1

Penelusuran Potensi Likuifaksi Pantai Padang Berdasarkan Gradasi Butiran Dan Tahanan Penetrasi Standar

. Padang 30 September 2009 earthquake had caused liquefaction at several locations in the city of Padang. Generally, liquefied areas were around the rivers or near the beach. In order to get the gradation of the liquefied soil, sieve analysis was conducted on soil samples. Based on those test result and drilling data, the assessment of liquefaction potential for soil layer around the coast of Padang is done. Soil investigation using deep drilling and standard penetration test to the hard layer has been done on the site. Furthermore, the soil gradations at certain depths were analyzed by comparing the gradation curve of the liquefied soil. Liquefaction potential assessment based on the soil gradation shows that the Padang Beach area has the liquefaction potential. The results are then compiled with the analysis of the liquefaction potential based on the standard penetration test. The depth of the soil layer that potentially to liquefy in Padang Beach is on the depth of less than 10m

Impact des gisements des phosphates sur la radioactivité dans les échantillons d’eau naturelle et d’air au Marocag

Impact of the phosphate layers on the radioactivity in the natural water samples and air in MoroccoIn this work, we present the results of radioactivity measurements in some samples of phosphate deposits and in samples in interaction with these  phosphate deposits such air and water. In phosphate samples, we have determined with gamma spectrometry using a well NaI(Tl) detector, concentrations of uranium in some samples of unrefined Moroccan phosphates. In air, we have measured, with nuclear solid track detector LR 115 type II,the volumic activity of 222Rn in some dwellings situated in phosphate areas. In water, we have measured activities of uranium and radium radio-isotopes (234U, 238U) with alpha spectrometry and those of radium ( 226Ra, 228Ra) with gamma spectrometry using a 220 cm3 low-background well type gamma ray detector in the aboratoire Souterrain de Modane (LSM-Centre National de la Recherche Scientifique (CNRS/CEA, France).The obtained results in Moroccan  phosphate samples and in samples in interaction with them are comparable to those habitually obtained in the same samples in the world and these activity do not present any risk for public health. Some harmful effects in the longterm could be avoided by simple precautions such ventilation of dwellings and localities of mining treatment

Technique de datation des échantillons riches en uranium par les séries de l'uranium en utilisant la spectrométrie gamma à basse énergie

Dating technique of samples rich in uranium by the series of the uranium by using the gamma spectrometry with low energyIn this work, a dating technique by the series of the uranium using the gamma spectrometry with Flow energy

Earthquake Damage Intensity Relationship for Residential Houses in West Sumatra

The Sumatra 30 September 2009 earthquake has damaged hundred thousand buildings in West Sumatra Province. The earthquake is located in 100 km offshore of Padang City, the Capital City of the province. Survey has been conducted to assess the damage of the building in few days after the earthquake. In this survey, the damage of buildings are categorised into 3 level that are heavily, moderate and slightly damages. This paper explores the level damage of building and then the intensity of the shaking in the affected area. Then based on the  coordinate of every building location, the buildings are scattered in  a map together with the intensity level. The relationship between the damage level and intensity for West Sumatra then is developed. This special damage-intensity relation is very important to be used for predicting the damage level due to a specified earthquake. The damage level is needed by The Government to develop an emergency and reconstruction budget plan for earthquake disaster in future

Activités de l’uranium et du radium dans des échantillons d’eau naturelle au Sahara marocain

Measure of uranium and radium activities in some natural watersamples from Moroccan SaharaThe preliminary results of  238U, 234U, 226Ra, 228Ra and 228Th activities and of 234U/238U,228Ra/226Ra, 228Th/228Ra and 226Ra/238U activity ratios obtained for 8 wells, 5 drillings, 2 springs and 3 tap water samples collected in Laayoune and Es-Smara regions in the Moroccan Sahara are given in this work. The analyzed natural water samples have been  collected from sources situated in a desert region rich in phosphates. Except for the one water drilling sample no used by population, the calculation of  equivalent doses to the maximal activities for each isotope show that all measured activities are inferior to the maximum contaminant levels recommended by the International Commission of Radioprotection and they don't present any risk for population health. The obtained results are comparable to those already found in other regions in Morocco or in the world

Analisis Jalur Terhadap Faktor-faktor Yang Mempengaruhi Indeks Prestasi Kumulatif (Ipk) Mahasiswa Statistika Undip

Education is a priority thing everyone today. Education is implemented in learning, by learning humans can develop all the potential there is in him. Learning is always related to the achievement of learning, because learning is a process while learning achievement is the result of the learning process. In the course of learning achievement levels measured by GPA (Grade Point Average). Factors that influence GPA among allowance, age, value of the UN Senior High School, many organizations, the internet long, long time to learn. Path analysis is the development of multiple regression which the independent variables affect the dependent variable not only directly but also indirectly affect. Based on the results of the discussion of the factors that affect the GPA is concluded that the allowance has indirect effect of -0,211, age has direct effect of age at 0,1901, the UN has direct effect of 0,258, many organizations have a direct effect of -0,3582 and has indirect effect of -0,132, the internet long direct effect of -0,2376 and has indirect effect of -0,038, long learning has a direct effect of 0,2344