<strong>Purpose: </strong><span style="font-family:;" "=""><span style="font-family:Verdana;">The purpose of this study was to assess the impact of free caesa...<strong>Purpose: </strong><span style="font-family:;" "=""><span style="font-family:Verdana;">The purpose of this study was to assess the impact of free caesarean section on maternal-fetal prognosis. </span><b><span style="font-family:Verdana;">Materials and Methods:</span></b><span style="font-family:Verdana;"> This was a descriptive, cross-sectional, comparative analytical study of one year of non-free caesarean section and three years of free with retrospective data collection. Our study took place from January 1, 2004 to December 31, 2004 and from January 1, 2007 to December 31, 2009. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> Caesarean section completion rates are 1.28%, 1.30%, 1.53%, 1.32% respectively in 2004, 2007, 2008, 2009. The average age was 27 years with extremes of 15 to 40 years. The peak of evacuations was recorded in 2007 with a rate of 89.4% and the peak of direct admissions in 2009 with a rate of 14.9%. An adequate means of transport was used in 77.20%. In 22.80% of cases an inadequate means was used. The indications of caesarean sections were dominated by preeclampsi</span></span><span style="font-family:Verdana;">a</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> 211/1045 caesarean section followed by acute fetal suffering 179/1045;86/1045;placenta previa 64/1045;presentations of the shoulder </span><i><span style="font-family:Verdana;">i.e.</span></i><span style="font-family:Verdana;"> 53/1045;pre-rupture syndrome 44/1045;retro-placental hematoma 27/1045. In terms of maternal prognosis: we noted maternal deaths with a rate of 2.4%</span></span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">4%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">4</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">3%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">0.4% respectively in 2004</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2007</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2008</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2009. And stillbirth rates were 17.6%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">22</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">4%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">27</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">4%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">21.7% respectively in 2004</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2007</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2008</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2009</span><span style="font-family:Verdana;">. </span><span style="font-family:;" "=""><span style="font-family:Verdana;">The average length of hospitalization was 10 days. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> Free caesarean section would be a factor in improving the maternal-fetal prognosis.</span></span>展开更多
In the present paper, the inelastic mean free path （IMFP） of incident electrons is calculated as a function of energy for silicon （Si）, oxides of silicon （SiO2）, SiO, and A1203 in bulk form by employing atomic/m...In the present paper, the inelastic mean free path （IMFP） of incident electrons is calculated as a function of energy for silicon （Si）, oxides of silicon （SiO2）, SiO, and A1203 in bulk form by employing atomic/molecular inelastic cross sections derived by using a semi-empirical quantum mechanical method developed earlier. A general agreement of the present results is found with most of the available data. It is of great importance that we have been able to estimate the minimum IMFP, which corresponds to the peak of inelastic interactions of incident electrons in each solid investigated. New results are presented for SiO, for which no comparison is available. The present work is important in view of the lack of experimental data on the IMFP in solids.展开更多
Cobalt-free maraging steels of different compositions have been prepared by electro-slag remelting technique using titanium and chromium instead of cobalt. Neutron removal cross-sections have been calculated, also mas...Cobalt-free maraging steels of different compositions have been prepared by electro-slag remelting technique using titanium and chromium instead of cobalt. Neutron removal cross-sections have been calculated, also mass attenuation coefficients and effective electron densities have been determined for the prepared samples in the photon energy range up to 2.8 MeV. Other steel alloys and lead samples have also been investigated for the sake of comparison. The results prove the superiority of cobalt-free maraging steels compared with the other steel types to be used as a proper shielding material in the nuclear field. Among the investigated steels, the steel “0.045%C- 13.35%Ni-2.05%Cr-4.5%Mo-0.06%Ti” has the best attenuation properties.展开更多
文摘<strong>Purpose: </strong><span style="font-family:;" "=""><span style="font-family:Verdana;">The purpose of this study was to assess the impact of free caesarean section on maternal-fetal prognosis. </span><b><span style="font-family:Verdana;">Materials and Methods:</span></b><span style="font-family:Verdana;"> This was a descriptive, cross-sectional, comparative analytical study of one year of non-free caesarean section and three years of free with retrospective data collection. Our study took place from January 1, 2004 to December 31, 2004 and from January 1, 2007 to December 31, 2009. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> Caesarean section completion rates are 1.28%, 1.30%, 1.53%, 1.32% respectively in 2004, 2007, 2008, 2009. The average age was 27 years with extremes of 15 to 40 years. The peak of evacuations was recorded in 2007 with a rate of 89.4% and the peak of direct admissions in 2009 with a rate of 14.9%. An adequate means of transport was used in 77.20%. In 22.80% of cases an inadequate means was used. The indications of caesarean sections were dominated by preeclampsi</span></span><span style="font-family:Verdana;">a</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> 211/1045 caesarean section followed by acute fetal suffering 179/1045;86/1045;placenta previa 64/1045;presentations of the shoulder </span><i><span style="font-family:Verdana;">i.e.</span></i><span style="font-family:Verdana;"> 53/1045;pre-rupture syndrome 44/1045;retro-placental hematoma 27/1045. In terms of maternal prognosis: we noted maternal deaths with a rate of 2.4%</span></span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">4%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">4</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">3%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">0.4% respectively in 2004</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2007</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2008</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2009. And stillbirth rates were 17.6%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">22</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">4%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">27</span><span style="font-family:Verdana;">.</span><span style="font-family:Verdana;">4%</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">21.7% respectively in 2004</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2007</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2008</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">2009</span><span style="font-family:Verdana;">. </span><span style="font-family:;" "=""><span style="font-family:Verdana;">The average length of hospitalization was 10 days. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> Free caesarean section would be a factor in improving the maternal-fetal prognosis.</span></span>
基金Project supported by the Indian Space Research Organization through Respond Project (Grant No.ISRO/RES/2/356/10-11)
文摘In the present paper, the inelastic mean free path （IMFP） of incident electrons is calculated as a function of energy for silicon （Si）, oxides of silicon （SiO2）, SiO, and A1203 in bulk form by employing atomic/molecular inelastic cross sections derived by using a semi-empirical quantum mechanical method developed earlier. A general agreement of the present results is found with most of the available data. It is of great importance that we have been able to estimate the minimum IMFP, which corresponds to the peak of inelastic interactions of incident electrons in each solid investigated. New results are presented for SiO, for which no comparison is available. The present work is important in view of the lack of experimental data on the IMFP in solids.
文摘Cobalt-free maraging steels of different compositions have been prepared by electro-slag remelting technique using titanium and chromium instead of cobalt. Neutron removal cross-sections have been calculated, also mass attenuation coefficients and effective electron densities have been determined for the prepared samples in the photon energy range up to 2.8 MeV. Other steel alloys and lead samples have also been investigated for the sake of comparison. The results prove the superiority of cobalt-free maraging steels compared with the other steel types to be used as a proper shielding material in the nuclear field. Among the investigated steels, the steel “0.045%C- 13.35%Ni-2.05%Cr-4.5%Mo-0.06%Ti” has the best attenuation properties.
