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Search Results: 1 - 10 of 198520 matches for " N. Keita "
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Note on a Continuum Multi-Country and International Trade  [PDF]
Keita Kamei
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.22040
Abstract: We provide an analytical solution for the continuum multi-country two-sector Ricardian model of Yanagawa (1996) [1], and obtain additional results that are not observed in the standard two-country two-good Ricardian model. Increases in productivity in each sector results in an increase in the number of countries producing high technology goods and a de- crease in the number of countries producing low technology goods.
Colposcopy at the University Hospital in Conakry: Role of Colposcopy in Screening and/or Diagnosis of Cervical Cancer in the UTH University Teaching Hospital of Conakry  [PDF]
A. F. M. Soumah, O. H. Bah, E. M. Bah, M. K. Camara, N. Keita, A. Diallo
Open Journal of Obstetrics and Gynecology (OJOG) , 2018, DOI: 10.4236/ojog.2018.85056
Abstract: Objective: This study was conducted to evaluate the role of colposcopy in the screening of cervical cancer at the UTH in Conakry. Material and Methods: We conducted a descriptive study on over a period of 18 months of from the 1 July 2004 to December 31, 2005 in the CHU of Conakry Any women aged from 25 to 65 years old who has agreed to the screening of cervical cancer by colposcopy was included. Statistical tests of sensitivity, specificity, and predictive values positive and negative were computed directly and compare among all participants. Results: During the study period, we included a total of 9339 women. For all precancerous and cancerous lesions, sensitivity and specificity were 93% and 64% respectively. With a positive predictive value of 46% and the negative predictive value of 90%, low and high grade precancerous lesions were found with: a sensitivity of 91%, the specificity of 64%. The positive predictive value of 37%, and the negative predictive value of 91% were estimed. Intra epithelial lesions (LIEBG) low-grade squamous sensitivity was 94%, specificity of 62%, the positive predictive value of 31%, the negative predictive value of 95%. For lesions intra epithelial highgrade squamous (LIEHG), the sensitivity was 85%, 10%, the positive predictive value of 74% specificity, negative predictive value of 95%. Conclusion: Colposcopy is a reference method of detection of precancerous lesions of the cervix to promote cancer.
Cholera in Guinea: The Implication for Safe Water Sources and Sanitations  [PDF]
Keita Mamady, Sylla Mafoule
Open Journal of Preventive Medicine (OJPM) , 2014, DOI: 10.4236/ojpm.2014.47064

Objectives: To lay stress upon the importance of adequate water and sanitation in the prevention of cholera in Guinea. Methods: The data on deaths and cases of cholera in Guinea from 2000 to 2011 were downloaded from the WHO Official website. The data on deaths and cases of cholera outbreak which occurred in Guinea from 02 February to 15 October 2012 were collected from the Guinean Ministry of Public Health. The cholera index case is confirmed by a laboratory test. Cholera cases were defined as individuals over one year old who had had watery stools with or without vomiting. Cholera incidence and case fatality rates between different areas of cholera occurrence in the country over time were computed. Results: Over the overall 12-year period (2000-2012), the case fatality rate showed a somewhat sign of slight rising trend when the incidence rates increased rapidly. During the seven consecutive years of cholera outbreaks in Guinea, between 2003 and 2009, the most affected areas were Conakry, Dubreka, Coyah, Boffa, Forécariah, Guékédou, Dalaba and Télimélé. In 2012, Cholera outbreak resulted in an incidence rate of 23.23 per 10,000 population and a case fatality ratio (CFR) of approximately 1.8%. Cases and deaths were reported in 12 prefectures out of 34: Conakry, Coyah, Forecariah, Fria, Boffa, Dubréka, Boké, Mamou, Kindia, Kankan, Kerouané and Dabola. Conclusion: Cholera is an important health problem in Guinea. Any earnest attempts to improve water and sanitation alongside with promotion of good hygienic practices will likely ward off the threat of cholera in the country.

Assessment of Head Injury Criterion Score of Shock Attenuation Material Employed around Playground Equipment Using Nonlinear Spring Contact Model  [PDF]
Yuji Ohue, Keita Miyoshi
Open Journal of Safety Science and Technology (OJSST) , 2014, DOI: 10.4236/ojsst.2014.42009
Abstract: In order to investigate the influence factors on HIC (Head Injury Criterion) score of shock attenuation materials employed around playground, impact tests were carried out in accordance with ASTM standard. Four kinds of the commercial shock attenuation materials were employed for the test. The apparatus is composed of the missile made from aluminum alloy with a mass of 4.6 kg and a triaxial accelerometer. The higher the missile was dropped, the more HIC score increased. The HIC score depended on the peak deceleration in collision. From the time-frequency analysis, it was obvious that HIC score depended on the characteristic frequency of the vibration system in collision between the missile and the shock attenuation material. There was sufficient evidence to suggest that the use of a simple vibration system with a nonlinear hardening spring is beneficial to assess HIC score and peak deceleration for the shock attenuation material.
Anatomical Variations of Recurrent Laryngeal Nerve: The Danger in Thyroid Surgery  [PDF]
Fatogoma Issa Koné, Siaka Soumaoro, Naouma Cissé, N’faly Konaté, Kassim Diarra, Djibril Samaké, Kadidiatou Singaré, Kadidiatou Singaré, Boubacary Guindo, Samba Karim Timbo, Mohamed Amadou Keita
Surgical Science (SS) , 2019, DOI: 10.4236/ss.2019.101002
Abstract: Objectives: We report two types of anatomical variations of the recurrent laryngeal nerve in two patients. Through these two patients we wanted to highlight our surgical approach of the recurrent nerve in an unusual position and to describe the surgical implication of these almost rare variations. Case report: patient aged 28 and 58 admitted for goiter. They underwent a right lobisthmectomy. Both recurrences were approached retrograde. The anatomical variations of the nerve concerned the non-recurrent laryngeal nerve in the first patient. In the second patient there were three anatomical variations, namely an extra laryngeal bifurcation of the nerve, a pre-vascular position of the nerve and a branch connecting the vagus nerve and the recurrent nerve. No recurrence nerve injury was noted. Conclusion: The anatomical variations of the nerve are numerous. A careful dissection is a guarantee of a good prognosis.
Non-Diabetic Nephropathies among Diabetic Patients of the Nephrology Department of Dakar  [PDF]
Mame Selly Diawara, M. M. Cisse, N. Keita, Y. Kane, S. Mahmoud, A. T. Lemrabott, M. A. Faye, S. Diagne, F. Ka, A. Niang, B. Diouf
Open Journal of Nephrology (OJNeph) , 2019, DOI: 10.4236/ojneph.2019.92005
Abstract: Introduction: Diabetic nephropathy is the most common cause of kidney disease in diabetics. However, in some cases the clinical symptoms is not typical and nephropathy may be different from diabetic and require the use of renal biopsy (RB) which is not usually indicated unless non-diabetic nephropathy (NND) is suspected. The objective of this study was to evaluate the prevalence of non-diabetic nephropathy (NDN) among the diabetic patients and to analyse the different predictive factors of its occurrence. Patients and methods: It was a retrospective, descriptive and analytical study which is carried out at the nephrology department of Aristide Le DANTEC hospital of Dakar over a period of 60 months. Diabetics with suspected NDN diagnosis based on renal anomalie that is associated with a recent diabetes, Acute renal failure with rapid progress, Diabetic retinopathy’s absence, and Extrarenal signs (cutaneous, digestive and articular) associated with an acute renal failure. Microscopic haematuria was included. The epidemiological, clinical, biological and histological parameters were collected and analysed using the SPSS, 3.5 version software. Results: Out of 34 biopsied diabetic patients, 12 had NDN that is a prevalence of 35, 3%. The average age was 49.88 ± 4.15 years, 0.78 for the sex-ratio and the mean duration of diabetes is 12.53 ± 4.7 years. Glomerular syndrome was found in 30 patients (88.23%), vascular nephropathy syndrome in 3 patients (8.82%) and tubule-interstitial nephropathy syndrome in only one patient (2.94%). Diabetic retinopathy (DR) and microscopic haematuria (HU) respectively existed in 10 patients (34%) and 15 patients (44. 12%). The Kidney biopsy (KB) indications were renal abnormalities associated with recent diabetes, acute renal failure with rapid progress, absence of DR, extrarenal signs associated with acute renal failure and microscopic haematuria. Twenty-two patients (64.7%) had diabetic nephropathy (DN) and 12 patients (38.2%) presented a NDN. Predictive factors of NDN diagnosis were a shorter diabetes duration (P = 0.0008), high blood pressure (P = 0.0015) and absence of DR (P = 0.005). Conclusion: Our data show that kidney injury in a diabetic is not always diabetic nephropathy. The Kidney biopsy (KB) is often needed in order to adopt an effective management.
Forceps Delivery at the Maternity Ward of Donka National Teaching Hospital Conakry (Guinea): Indications and Maternal-Fœtal Prognosis  [PDF]
M. H. Diallo, I. S. Baldé, O. Baldé, B. S. Diallo, A. Diallo, I. Sylla, B. Diallo, A. D. Diallo, Y. Hyjazi, N. Keita
Open Journal of Obstetrics and Gynecology (OJOG) , 2019, DOI: 10.4236/ojog.2019.94049
Abstract: Objectives: The objectives of this work were to describe the socio-demographic, clinical and prognostic characteristics of forceps deliveries at the maternity ward of the Donka National Teaching Hospital of Conakry. Parturients and Method: This was a prospective and descriptive study of all forceps deliveries performed at the Donka National Hospital maternity ward over a 6-month period from April 1, 2018 to September 30, 2018. Results: We performed 90 fetal extractions by forceps on 3518 deliveries i.e. a frequency of 2.55%. The socio-demographic profile of the parturient women was that of a young primiparous woman with an average age of 21.20 years and a full-term pregnancy with an average gestational age of 39 weeks of amenorrhoea. Fore position varieties were the most frequent with, in order of frequency, the fore left occipito-iliac (61.3%) and the fore right occipito-iliac (22.22%).
Fatality from Road Traffic Accident in Guinea: A Retrospective Descriptive Analysis  [PDF]
Keita Mamady, Bin Zou, Sylla Mafoule, Jiabi Qin, Keita Hawa, Keita Fodé Lamine, Guoqing Hu
Open Journal of Preventive Medicine (OJPM) , 2014, DOI: 10.4236/ojpm.2014.411091
Abstract: Objectives: Causes and risk factors that result in fatal road traffic accident have not been described at the national level in Guinea yet. The goal of this study is to explore the causes and risk factors related to fatal road traffic accident, identified most vulnerable road users, and inform the road traffic prevention policy in Guinea. Methods: We made a retrospective descriptive analysis based on national fatal road traffic accident data from the Department of Health Information at the Guinean Ministry of Health for year 2011. Results: In 2011, road traffic accident was responsible for an aggregate number of 1655 deaths with an overall death rate of 15.3 per 100,000 population. Male experienced more than twice the risk of death from road traffic accidents (21.9 deaths per 100,000 population) compared with female (9.0 deaths per 100,000 population). While taking the population as a whole, the highest death rate was found among the middle aged in 35 - 49 age group accounting for (29.7 deaths per 100,000 population), followed successively by young adults age group 25 - 34 years (24.6 deaths per 100,000 population), and the middle aged in 50 - 64 age group (22.9 deaths per 100,000 population). Principally, occupants, motorcyclists and pedestrians sustained considerable burden of deaths respectively (9.2; 2.9; 2.2 per 100,000 population). In re-gional setting, the highest death rate was found in Upper Guinea (19.5 per 100,000 population), followed by Forest Guinea (18.7 per 100,000 population) and Middle Guinea (16.8 per 100,000 population). A large proportion of male was killed as motorcyclist than female while high per-centage of female died as occupant than male for all age group. The regional distribution showed that when a remarkable number of occupant death were observed in Upper and Forest Guinea, more people died as pedestrian and pedal cyclist in Conakry. Conclusions: This study demonstrated that most of the deaths were among occupants, motorcyclists and pedestrians, and the productive workforce aged 25 - 49 years. It was found that majority of the deaths happened in Upper Guinea followed by Forest Guinea. Improvement of roads design, strict enforcement of road safety laws and raising the awareness of general public about the causes and risks factors of road traffic accident through various channels are highly required which will promote economic growth in the local communities and then help people escape the poverty trap.
Horton Revisited: African Traditional Thought and Western Science
L Keita
Africa Development , 2007,
Abstract: Over the years Robin Horton has argued for what he refers to as the ‘continuity thesis’ according to which there are theoretical similarities between African traditional thought and modern Western science. Horton’s thesis stands in contrast to the standard Western anthropological appraisal of traditional African thought. The standard appraisal (Levy-Bruhl, Durkheim, Evans-Pritchard, et al.) stated that the two modes of thought were incommensurate. I argue that while the continuity thesis holds for certain aspects of African thought – empirical, protoscientific and metaphysical – it does not apply to traditional African religious expression. My thesis here is that belief systems founded on magic, religion and their combinations should be understood as belonging to what might be referred to as general metaphysics. I argue too that if the continuity thesis is to apply to the history of thought in Africa then the more apt comparison should be between the different phases of technological and scientific thought of the West. Thus Horton’s claim that traditional African religious thought is configured according to the goals of explanation, prediction and control thereby putting it on the same epistemic plane as modern Western science is thereby rendered irrelevant. On the other hand the goal of traditional African religion like that of many other religious traditions – including those of the West – has principally been to seek a conscious communion with ancestors and anthropomorphised godheads and spiritual entities of the metaphysical realm.
Book Review: How Rich Countries Got Rich and Why Poor Countries Stay Poor
L Keita
Africa Development , 2009,
Abstract: by Erik S. Reinert, How Rich Countries Got Rich and Why Poor Countries Stay Poor, New York: Public Affairs, 2008. pp. xxix + 365. $17.95.
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