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Velocity Form Calculations of Generalized Oscillator Strengths for 3s→ (3p, 4p, 5p, 6p) Dipole Transitions of Atomic Sodium in Debye Plasma

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Open Journal of Applied Sciences 2024年第6期14卷 1512-1529页

作者： Louis Gomis Clement Diatta Moustapha Sadibou Tall ibrahima Gueye faye Rama Gomis Yande Diouf Mamadou Coulibaly Laboratoire de Physique des Plasmas et de Recherches Interdisciplinaires Departement de Physique Universite Cheikh Anta Diop Dakar Senegal

In this paper, the generalized oscillator strengths (GOSs) of excitations of atomic sodium from ground state to 2p63s0 (3p, 4p, 5p, 6p) states, immersed in Debye plasma, were calculated by using wavefunctions which were obtained numerically from the restricted Hartree-Fock (RHF) equation. This RHF equation employs the local density approach for exchange interactions including plasma Debye screening. Theoretical RHF and random phase approximation with exchange (RPAE) velocity calculations have shown that the GOSs for excitations to 3 s0(3 p,4 p,5 p,6 p)depend on the plasma Debye screening effects, as shown by the reduction in the GOS amplitude with decreasing Debye length λD. The agreement between the present RPAE V results for the transitions 3 s→3 s0(3 p,4 p,5 p)and the length calculations of Martínez-Flores was satisfactory. Correlation effects were found quite to be significant in the vicinity of the maxima of the GOS of the 3 s→3 s0(4 p,5 p,6 p)excitations by using the RPAE V approach. We note the poor influence of many electron correlations on the GOS of (3 s→3 p)transition with the same principal quantum number. Finally, we comment that the RPAE V calculations are useful in investigating electron correlation effects on the transition GOS of atomic sodium planted in Debye plasma. The present velocity results also reveal that the 3 s→3 s0(5p, 6p)transition GOSs tend to be delocalized due to more significant screening effects at Debye lengths λD=20and 30 a.u. for excited subshells 5p and 6p, respectively. We report here novel results of GOS for 3 s→3 s06ptransition obtained from different Debye lengths.

关键词： Plasma Screening Effect Correlation Effect Sodium Atomic Velocity Form GOS Restricted Hatree-Fock Random Phase Approximation with Exchange

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Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia

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Acta Geologica Sinica(English Edition) 2017年第5期91卷 1778-1796页

作者： Hammad Tariq JANJUHAH José Antonio GáMEZ VINTANED Ahmed Mohamed Ahmed SALIM ibrahima faye Mumtaz Muhammad SHAH Deva Prasad GHOSH SEACARL Department of Geoscience University Technology PETRONAS Perak Malaysia 32610 Department of Geoscience University Technology PETRONAS Perak Malaysia 32610 Department of Fundamental and Applied Science University Technology PETRONAS Perak Malaysia 32610 Department of Earth Science Quaid-i-Azam UniversityIslamabad Pakistan 45320 CoE in CSIf Department of Geoscience University Technology PETRONAS Perak Malaysia 32610

The Luconia Province-offshore Sarawak-is a key geological unit for understanding the distribution of hydrocarbon resources in Malaysia. Nevertheless, little effort has been made to address the palaeoenvironmental characteristics of the Tertiary carbonates in the key sector of Central *** study the sedimentology and petrography of core samples from a well in Central Luconia, for which thirteen microfacies have been identified reflecting different depositional settings. This is the first microfacies scheme elaborated for Luconian carbonates. Lithofacies and microfacies distribution are compatible with deposition in a reef complex, originating around a framework reef, within the euphotic zone. Sediments were deposited in environments of backreef, reef crest, and forereef. The fair weather wave base is marked by the presence of coralline red algae, foraminifera, decreasing degree of bioclast fragmentation and other microfacies features. As a result, a depositional-environmental model is constructed, depicting a reef complex built around a framework reef developed on the margin of an isolated platform. In addition, an innovative, preliminary time series analysis of facies, microfacies and depositional environment data reveal the existence of seasonal cycles in the stacking patterns of facies and microfacies.

关键词： central Luconia sedimentology microfacies reef complex depositional environments time series

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Duplication of the Inferior Vena Cava, Azygos Continuation and Retro Aortic Renal Vein: Fortuitous Discovery

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Forensic Medicine and Anatomy Research 2021年第3期9卷 31-40页

作者： Géraud Léra Akpo Ndeye Bigué Mar Soukeyna Abouabdillah Nfaly Badji Hamidou Deme Youssoupha Kasse ibrahima Niang Mamadou Lamine Gueye Marcel Mbarga ibrahima faye Abdoulaye Dione Diop Assane Ndiaye Sokhna Ba Diop El Hadji Niang Service de Radiologie Imagerie Médicale de l’h&#244pital Ariste Le Dantec Dakar Sénégal Laboratoire d’Anatomie UFR des Sciences de la Santé Université Iba Der Thiam de Thiès Thiès Sénégal Service de Radiologie Imagerie Médicale de l’h&#244pital Fann Dakar Sénégal Service de Radiologie Imagerie Médicale de l’h&#244pital Dalal Jam Dakar Sénégal Laboratoire d’Anatomie UFR des Sciences de la Santé Université Assane SECK de Ziguinchor Ziguinchor Sénégal

We present a rare case associating inferior vena cava’s (IVC) complex variations. Anatomical, embryological and clinical aspects are discussed. Duplication’s discovery was fortuitous during an abdominal ultrasound and was confirmed by the CT scan. The latter also highlighted azygos continuation, retro aortic renal vein and an iliac venous anomaly. These variants are important to know in order to be able to differentiate them from lymphadenopathy, para-vertebral masses, and aortic pathologies. It is necessary to report them before any retroperitoneal surgery or interventional vascular procedure.

关键词： Duplication IVC Continuation Azygos Tomodensitometry

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Prevalence and Associated Factors of Postpartum Depression: A Study Conducted in Health Centres in Dakar (Senegal)

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Open Journal of Psychiatry 2024年第1期14卷 45-66页

作者： Sokhna Seck Momar Camara Racky Wade Kane Djeynaba Bassine Baldé El Hadj Makhtar Bâ Adama Koundoul Idrissa Bâ ibrahima Ndiaye Papa Lamine faye Aida Sylla Service de psychiatrie Centre Hospitalier National Universitaire de Fann Dakar Sénégal

Introduction: Postpartum depression is the most common psychiatric disorder affecting women in the perinatal period. According to the WHO, it affects 10% - 15% of women who have just given birth. In Africa, and particularly in Senegal, epidemiological studies focusing exclusively on postpartum depression are rare or non-existent. For this reason, we conducted this screening study on postpartum depression to assess the socio-demographic characteristics and associated factors. Methods: This was a prospective cross- sectional study with descriptive and analytical aims. It was carried out in the twelve Dakar referral health centres during the period August 2021 to June 2022. Results: At the end of our survey we had recruited one hundred and twenty-two (122) participants with a PPD prevalence rate of 25.41%. The most common age group was 24 - 29 years. 40% of the participants were of Fulani ethnicity, followed by Wolof. Married women made up 93% of the sample. The school enrolment rate was 89%. Most participants were not in paid employment. Domestic violence was present in 14% of couples. 28% of mothers reported experiencing a stressful life event during their pregnancy. 22% of the women had a chronic medical condition, of which 55% had high blood pressure. 1% of the women reported a personal psychiatric history and 5% a family psychiatric history. Most women had between two and four healthy living children. The pregnancy was unwanted in 17% of cases and 12% of participants had a complication. 6% were dissatisfied with the quality of their antenatal care. The caesarean section rate was 18%. In terms of associated factors, eight factors were identified in a bivariate analysis: single marital status, lack of support from partner, domestic violence, conflict with in-laws, and the occurrence of a stressful life event during pregnancy, the presence of a personal medical history, lack of satisfaction with pregnancy follow-up, and mode of delivery by caesarean section. Conclusi

关键词： Postpartum Depression Prevalence Associated Factors Senegal

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CT Scans and Delays in Diagnosis of Stroke in Senegal’s Regional Hospitals: A Multicenter Study of 655 Cases

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Open Journal of Medical Imaging 2020年第2期10卷 96-104页

作者： Hamidou Deme Nfally Badji Léra Géraud Akpo Oumou Dieng Abdoulaye Dione Diop Fallou Galass Niang Mouhamadou Hamine Toure ibrahima faye Malick Diouf Aicha Ndichout Marie Mbengue Cherif Mohamadou Aidara Mamadou Ly Ousmane Sano Ndiaga Matar Gaye Ousmane Cissé Abdoulaye Ndoye Diop Aissata Ly Ba Sokhna Ba Diop El Hadj Niang Radiology Department of the Aristide Le Dantec Hospital in Dakar Dakar Senegal Radiology Department of the CHNU de Fann in Dakar Dakar Senegal Neurology Department of the Fann University Hospital in Dakar Dakar Senegal Radiology Department of the Albert Royer Children’s Hospital of Fann in Dakar Dakar Senegal

Stroke represents the 2nd cause of mortality and 1st cause of physical disability in the adult population. In Senegal, it represents 30% of hospitalization and 2/3 of the mortality in the department of neurology in the capital city, Dakar. Objective: To specify the types of stroke and to evaluate diagnostic delays in Senegal’s regional hospitals. Materials and Methods: This was a retrospective, cross-sectional, descriptive, multicentric study for 4 years (from 2014 to 2017) including any patient presenting a clinical suspicion with a CT scan confirmation of stroke in one of the 9 regional hospitals in Senegal with a recruitment period of 6 months per hospital. CT scans were performed with a 16 slices machine in 6 hospitals, 4 slices in 2 hospitals and 2 slices in 1 hospital. We studied the types and location of strokes, the associated signs and the time from stroke onset to admission and the time from admission to CT scan. Results: 655 patients were retained including 322 men and 333 women for an M/F ratio of 0.96. The average age was 63 years (range: 7 years, 112 years). High blood pressure was noted in 59.2% of patients and diabetes in 10.7% of patients. Strokes were ischemic in 76% of cases involving the middle cerebral artery in 73% of cases and hemorrhagic in 24%, of which 80.7% were deep localized. A mass effect was noted in 7.5% of cases, an engagement in 6.9% of cases and ventricular hemorrhage in 2.7% of cases. The delay between the onset of the deficit and admission was less than 6 hours in 10.6% of patients. The time between the onset of stroke and admission to hospital was specified in 416 patients (63.5%) of the study population, it was less than 6 hours in 10.6% of patients, between 6 hours and 24 hours for 29.3% and more than 24 hours for 60.1%. Between admission and the CT scan, the time was precise in 459 patients (70%), it was less than 6 hours in 37.9%, between 6 hours and 24 hours in 43.6 % and more than

关键词： Stroke CT Scans Diagnostic Delays

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Survey on Knowledge of Cardiovascular Disease Risk Factors in the Dakar Region

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Journal of Diabetes Mellitus 2024年第2期14卷 122-132页

作者： Djiby Sow Nafy Ndiaye Mouhamed Yakham Leye Fulgence A. faye Michel Assane Ndour Marie Joseph Gomis Fall Ndiouga Mouhamed Dieng Boundia Djiba Houleye Saou ibrahima M. Diallo Demba Diédhiou Anna Sarr Mbaye Maimouna Ndour Abdoulaye Leye Clinique Mé dicale II Centre Hospitalier Abass Ndao UCAD Dakar Senegal Department of Internal Medicine and Endocrinology Centre Hospitalier Pikine Dakar Senegal Department of Medicine Faculty of Health and Sustainable Development Alioune Diop University of Bambey Bambey Senegal

Introduction: Non-communicable diseases constitute a major public health problem, due to their morbi-mortality. The aim was to study knowledge of cardiovascular risk factors among residents of Dakar. Patients and Methods: This was a descriptive cross-sectional study. Our investigations were recruited over a six-month period (October 17, 2021 to March 21, 2022). Results: Two hundred and twenty-six (226) patients were enrolled. The mean age was 45.9 years. The under-40 age group was the most represented with 37.2%. There were 129 men (57.1%), giving a male/female sex ratio of 1.33. The highest level was represented by 159 people (70.4%). Those who responded (heart disease) were in the majority (38.1%). Hypertension was the most common CVD for 101 people (44.7%). One hundred and ninety (190) people (84%) knew the risk factors for CVD. Good knowledge of risk factors concerned 103 people (54.2%). Obesity was the best-known risk factor in 156 cases (69%). The media was the most important source of information for 121 people (53.5%). Hypertensives were the most represented with 8.4%. One hundred and thirty (130) people (57.5%) had previously paid attention to these FDRCVs. Awareness campaigns were the most effective means of communication for 170 cases (75.2%). Sixteen (16) people (35.6%) were taking antihypertensive medication. Walking was the most popular physical activity for 102 people (45%). People with a balanced diet were in the majority, with 174 respondents (77.0%). Conclusion: NCDs are a major cause of morbidity and mortality. It is essential to develop and implement a prevention and management program.

关键词： Hypertension Diabetes Risk Factors Senegal

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Effects of Chemical Treatment on the Physical Properties of Typha

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Fluid Dynamics & Materials Processing 2022年第5期18卷 1409-1418页

作者： ibrahima Diaw Mactar faye Seckou Bodian Vincent Sambou Efficiency and Energetic Systems Research Group Alioune Diop UniversityBambeyBP 30Senegal Laboratoire Eau EnergieEnvironnement et Procédés Industriels(LE3PI)Cheikh Anta Diop UniversityDakar-FannBP 5085Senegal

Plant-based concretes are produced from plant aggregates and a *** fibers are mainly composed of saccharides(sugars)and these sugars can decrease the concentration of Ca2+ions in the cement pore solution and delay the formation of hydration *** improve the interfacial bond between fibers and matrix a chemical treatment is widely *** study investigates the effect of sodium hydroxide treatment on physical and hygroscopic properties of Typha *** particular,a 5%sodium hydroxide solution is used to treat these aggregates and their bulk and absolute densities,porosity,water content and water absorption are evaluated *** indicate that bulk and absolute densities increase after treatment from 56.44 kg/m^(3) to 122.57 kg/m^(3) and 541.93 kg/m^(3) to 555.17 kg/m^(3),*** treatment reduces porosity of Typha from 89.58%to 77.92%and decreases water content from 1.4%to 1%.The treatment with sodium hydroxide reduces substantially the water absorption of the aggregates.

关键词： Sodium hydroxide treatment typha aggregates hygroscopic properties physical properties

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Effects of Preparation’s Parameters on Stabilization of Sabodala Gold Mine Tailings: Comparison of Fresh and Weathered Materials

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Journal of Geoscience and Environment Protection 2017年第9期5卷 21-35页

作者： ibrahima Dia Cheikhibrahima faye Dame Keinde Mababa Diagne Mamadou Gueye Institut des Sciences de la Terre Université Cheikh Anta Diop de Dakar Dakar Fann Senegal Ecole Supérieure Polytechnique Université Cheikh Anta Diop de Dakar Dakar Fann Senegal

The Sabodala gold mine tailings were stabilised using geopolymerization technics in order to improve their mechanical properties in general for a reuse as building materials for local communities. The effect of several preparation parameters on the compressive and tensile strength of the stabilised tailings has been studied to define their optimums. For each formulation, all parameters are kept constant and only one is variable. The prepared samples are then tested for compressive and tensile strength to see how the variable parameter impact on these properties. The same work was carried out for the fresh tailings and for the weathered one to see whether they behave differently and if they need different treatment. The results show that for most of parameters, there is an optimal value on either side of which compressive and tensile strength decrease. Except for few parameters, the fresh and the weathered tailings have a similar behaviour with regards to trends of their mechanical properties with changing preparation conditions. In addition to the similarity of weathered and fresh tailings mechanical characteristics following their stabilization by geopolymerization, this work has proved the considerable effects of the preparation’s parameters.

关键词： Gold Tailings Geopolymerization Stabilization Compressive Strength Tensile Strength

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Hardware Security for IoT in the Quantum Era: Survey and Challenges

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Journal of Information Security 2023年第4期14卷 227-249页

作者： Doudou Dione Boly Seck Idy Diop Pierre-Louis Cayrel Demba faye ibrahima Gueye IT Engineering Department Cheikh Anta Diop University Dakar Senegal

The Internet of Things (IoT) has become a reality: Healthcare, smart cities, intelligent manufacturing, e-agriculture, real-time traffic controls, environment monitoring, camera security systems, etc. are developing services that rely on an IoT infrastructure. Thus, ensuring the security of devices during operation and information exchange becomes a fundamental requirement inherent in providing safe and reliable IoT services. NIST requires hardware implementations that are protected against SCAs for the lightweight cryptography standardization process. These attacks are powerful and non-invasive and rely on observing the physical properties of IoT hardware devices to obtain secret information. In this paper, we present a survey of research on hardware security for the IoT. In addition, the challenges of IoT in the quantum era with the first results of the NIST standardization process for post-quantum cryptography are discussed.

关键词： IoT Hardware Security Side-Channel Attacks Post-Quantum Cryptography NIST

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Cartography of Landslide Susceptibility around the Dias Horst and Thies Cliff-Senegal

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International Journal of Geosciences 2017年第6期8卷 821-836页

作者： Issa Ndoye Mapathé Ndiaye Déthié Sarr Papa Sanou faye ibrahima Khalil Cissé Laboratoire de Mécanique et Modélisation UFR Sciences de l’Ingénieur Université de Thiès Thiès Sénégal Laboratoire de Mécanique des Sols et des Matériaux Ecole Polytechnique de Thiès Thiès Sénégal

The aim of this work is to map the susceptibility of sites to landslides. To assess the susceptibility of the zone, GIS techniques were used. Susceptibility factors are selected and split into two groups: active and passive factors. Passive factors regroup all the intrinsic conditions existing on the field at all times. The active factors or triggering factors are present sporadically and are added to the passive factors to trigger a landslide. With the weighted overlay method using ArcGIS?, four scenarios have been developed. A first scenario where only passive factors are combined and three scenarios for which we have for each scenario the passive factors combined with an active factor. With these different scenarios, five levels of susceptibility are obtained in the zone. These levels range from very low to very high susceptibility. For the different scenarios, the results show that the zone consists mainly of very low to low susceptibility with at least 61% of the area, followed by moderate susceptibility (23.54% to 38.24%) and last land with high susceptibility to very high with less than 1% of the surface. Fields with high to very high susceptibility are located on the slopes of the hills. Among the active factors, only the rainfall significantly modifies the percentage of land susceptible to landslide but remains in the field of moderate susceptibility. The predicted susceptibilities are closer to the observed landslides around the Thies Cliff than to the Dias Horst.

关键词： Cartography Susceptibility Landslides Dias Horst Thies Cliff

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