Chlamydia trachomatis is the most common bacterial infection sexually transmitted around the world. It is a public health problem in Africa and in Cameroon in particular causing infertility. The aim of our study was to evaluate the prevalence and risk factors associated with this infection in a population of women who spontaneously referred to the district hospital in Nkoldongo, Yaounde. Assay of IgG and IgM anti Chlamydia trachomatis antibodies in each serum was performed using ELISA method with the test kit provided by Biologicals General Corp Laboratories. The results were as follows: 41 women out of 182 with a prevalence of 22.52 CI95% (16.45-28.5) were tested positive for Chlamydia trachomatis. In our study 23.08% of women were infertile and the prevalence of infection (10.43% CI95% 6-14.8) among them is statistically higher than in the 3 others groups (antenatal care, premarital and contraception). Women less than 23 years of age were the most exposed to this infection with a prevalence of 6.04% CI95% (2.64-9.44), though the relationship between age and Chlamydia trachomatis was not statistically significant (p>0,05). However, the influence of Chlamydia trachomatis on infertility was statistically significant (p<0, 05). Moreover, the education profile of the patients also had a significant influence on the infection (p<0, 05). Low level of education is the only risk factor associated with Chlamydia trachomatis infection in this study.

Cloud storage service is increasingly important and beneficial to the internet users. Users around the world enjoy the high performance cloud servers that are reliable, cost-effective and highly available. Communication vulnerability is also rising to destroy the confidentiality and integrity of user data and information while accessing via network. To resolve these attacks, cloud service providers offer gateways of secured access to the storage services. Though the existing systems are in reasonable standard, investigating a better approach towards security is always worthy. In this paper, we propose a two-step access control system based on Kerberos authentication protocol implemented using Java based authentication service, JAAS. This system provides a well-built and more powerful encryption process by applying Kerberos in two steps. Finally, we build a real time access control system that implements our proposed system.

It is not to show how biomaterials earn significant gap in the evolutionary perspective of man. In this article, we initially developed the concepts of materials and biomaterials. Then we are interested in studying the cardiovascular system of the human body, which allowed us to identify the bodies of the latter can be replaced or reinforced biomaterials. Given our research subject, we exploited Matrix Laboratory software (MatLab) to determine the characteristics of a new biomaterial bringing organic aorta.

This paper presents a numerical method called Laplace Transform Series Decomposition Method (LTSDM) for solving fifth and sixth order boundary value problems in a finite domain with two point boundary conditions is presented. The method has to do with the combination of Laplace Transform method, series expansion and Adomian polynomial. The numerical results obtained using LTSDM are compared with the exact solutions, Differential Transform and Adomian Decomposition Methods. The results showed that the method is quite accurate, reliable, powerful, efficient, and is practically well suited for use in the problems considered.

Uterine sarcomas are malignant tumors with poor prognosis. The purpose is to clarify the epidemiological, diagnostic difficulties and therapeutic modalities and prognosis of uterine sarcomas. Twelve cases of uterine sarcomas supported the National Institute of Oncology (2008-2011) were analyzed. The average age is 43.75 years. Patients viewed had the clinical triad of bleeding, pain and / or pelvic mass. On the para-clinical, seven patients had an inconclusive ultrasound, however the scan was performed in all our patients showing a pelvic mass. The realization of the biopsy endometrial curettage led to the diagnosis. All patients underwent a hysterectomy associated with lymph node dissection in cases with carcinomatous component. Histological analysis of surgical specimens objectified 06 carcinosarcomas, 03 leiomyosarcoma, 02 endometrial stromal sarcoma and an adenosarcoma. In our study in discordance with the literature, the mixed mesenchymal tumors (carcinosarcoma and adenosarcoma) are the most common histological type 58.33% followed by pur sarcoma (sarcoma and endometrial stromal leiomyosarcoma) with a frequency of 41.67%. The average age of patients (43.75 years) is consistent with the literature. The classic clinical triad, reported by most authors, was found in the majority of patients. MRI and PET scan are the most successful exams. The diagnosis rests on hysterectomy’s piece. For treatment, surgery with hysterectomy and adnexectomy with or without lymph node dissection followed by external radiation therapy is the gold standard. Indeed, uterine sarcomas are malignant tumors with poor prognosis whose diagnosis is primarily postoperative. Surgery with radiation therapy is the gold standard. Hope rests on new drugs that are being tested.

Until now, malaria remains a major public health problem in the intertropical zone. There is an urgent need to identify new anti-malarial drug targets, due to the increasing problem of drug resistance to malaria parasites. Historically, the majority of antimalarial drugs have been derived from medicinal plants or from structures modelled on plant lead compounds. In various West African countries, several plants have been reported to be having antimalarial effects and are being applied traditionally as antimalarial agents. This review focuses on medicinal plants which are used to treat malaria in West Africa during the period of 2003 to 2015. It also attempts to describe some tests which can be used to evaluate plant extracts for antimalarial activity. One hundred and forty-six herbal plants have been captured in this article due to their local usage as antimalarial agents. Some like Acanthosermum hispidum D.C., Icacina senegalensis, Pavetta crassipes, Croton labatus, show intense activity against malaria parasites in vitro and in experimentally infected mice. The array of medicinal plants employed as antimalarial agents in West Africa, unveils a promising source for the development of new and better antimalarial drugs. It is vital that the efficacy and safety of traditional medicines be validated and their active constituents be identified in order to establish reliable quality control measures.

The objective of this study was to estimate the impact of obtaining different types of credit on the production and income of rice faming households in North West region of Cameroon. This study is based on a sample of 183 rice farming households randomly selected within the rice growing villages in the region. The ordinary least square estimation shows that credit in kind, coaching, surface area cultivated, and secondary activity have a significant and positive effect on rice production. The Average treatment effect of the treated shows that Credit in kind is 51% and that for credit in cash 16.81%. Low effect of credit in cash is attributed to the fact that cash is used to handle other problems in the family. The study recommends that, rice farmers should adhere to farming organizations to permit them gain capacity building granted by UNVDA in combination to credit in kind such as seeds, fertilizers, herbicides, pesticides etc. and low cost rental of modern production tools. The upstream training on farming techniques is also required. Credit in cash should be limited. All these pull together will help to increase the production level that will go a long way to improve the income of rice producing households.

Purkinje network of a Magnetic Resonance Image cardiac dataset has been extracted using 3-D slicer. From that extracted model simplified circuit of Purkinje network has been generated with help of simplified version of cable theory. Also the length of each node of human heart has been identified using landmark tools of 3-D slicer. The action potential propagating through the network was simulated in MATLAB and the circuit was simulated in Multisim. This simulation was then represented with help of a 3-D printed heart visualization module. The main intention of designing a circuit equivalent to Purkinje network was achieved. However, the pulse of circuit was found to be lower than the actual pulse generated by the Purkinje network.

In this paper, we consider the de Sitter algebra and we realize the Kählerian structure by using the fact that the dual of a Lie algebra of a Lie group has a natural Poisson structure and also the fact that a non-degenerate Killing form on a Lie algebra induces a metric on its dual.

We have conducted a research about the actual situation of Bukavu town that is facing problems of rural exodus and the proliferation of houses which are built in disorder without the intervention of local administrative leaders. Historic-critical and comparative methods with interviews and documentary notes have helped us to collect data for this piece of work in order to understand the phenomenon and events that are related to the division of Kivu lake coast. These methods and techniques have helped to make a location of elements and effects and look for their basic reasons in the timing and temporary setting with the aim of establishing the similarity and discordance between the Kivu lake littoral 20 years ago and the actual situation of this last with reference to certain administrative rules related to this issue. From our research, we have found out that there is remarkable weakness of politico-administrative authorities in matter of keeping the littoral of Kivu lake and environment protection. People get small lands to build their dwellings even on lands which were considered dangerous to build houses in former time. Places which are protected by the law, among which Kivu Lake did not escape to this predation and consequences, are now numerous at different levels. We have recommended to politico-administrative leaders to establish public waste bean, to adjust the littoral of Kivu Lake, the sensitization of the population, to make a regular checking of people who are building, to destroy some houses which were built on lands which are dangerous, to build houses at 10 meters far from the littoral, to respect environmental rules and establish appropriated strategies.

This study deals with farmers' perceptions of climate change and adaptation strategies in the main economic activities (agriculture and livestock) in the village of Baoucheri. Data were collected through a methodological approach focused primarily on qualitative surveys (individual interviews), quantitative (individual questionnaire survey) and focus group. The results show that farmers clearly perceive climate change. These translate into a decline and spatiotemporal irregular rainfall, extreme events such as high heat, high intensity of rain, flooding and high winds. These elements have an impact on agriculture, livestock and natural resources resulting in lower agricultural yields, reduced livestock and degradation of natural resources. In response to these constraints the main strategies adopted by farmers are: the rural exodus, agro-pastoralism, animal sales, reducing the number of meals per day, use of organic fertilizers and adoption of the domestic livestock and intensifying market gardening.