I2PA : An Efficient ABC for IoT

Internet of Things (IoT) is very attractive because of its promises. However, it brings many challenges, mainly issues about privacy preserving and lightweight cryptography. Many schemes have been designed so far but none of them simultaneously takes into account these aspects. In this paper, we propose an efficient ABC scheme for IoT devices. We use ECC without pairing, blind signing and zero knowledge proof. Our scheme supports block signing, selective disclosure and randomization. It provides data minimization and transactions' unlinkability. Our construction is efficient since smaller key size can be used and computing time can be reduced. As a result, it is a suitable solution for IoT devices characterized by three major constraints namely low energy power, small storage capacity and low computing power

The Impact of Microcredit on Promoting Female Entrepreneurship: The Case of the Cooperative of Women Merchants in the Municipality of Gao

This work is based on a questionnaire intended for women entrepreneurs in the municipality of Gao. This research therefore aims to measure the effect of microcredit on the development of income-generating activities for these women.It is based on a particular case, namely the impact of credit on the activities of traders in the commune of Gao. The methodology used for this research is the descriptive method which is based on a statistical analysis through graphs, and cross tables, with version 20 of the Statistical Package for the Social Sciences (SPSS) software and the R (4.2.1, our sample was made up of 100 women, all members of the cooperative of women traders in the commune of Gao.Our results indicate that microcredit has a positive effect on the income-generating activities of beneficiaries. Thus, women's access to this credit has enabled them to increase their turnover and their profits, while meeting the conditions for the sustainability of their income-generating activities through the strengthening of organizational capacities. Keywords: female entrepreneurship, micro credit, tradeswoman, multinomial logit. DOI: 10.7176/EJBM/14-24-01 Publication date: December 31st 202

Determinants of Success of the Young Entrepreneurship: Case of Young Financed by Fier in Segou Region

This research focuses on a less explored subject but one of considerable importance for the development of the Segou region, mainly the determinants of the success of young entrepreneurs. The objective of this research was to determine the success factors of entrepreneurs (entrepreneurial activities) financed by the FIER Project in the region of Segou. As part of this research, data were collected from a sample of 334 (three hundred and thirty-four) young entrepreneurs who are partners in the project.The results show that six (6) branches of activity were identified which are cattle fattening at 65.3%, followed by sheep fattening at 27.2%, cereal trade at 4.2%, goat breeding at 1.8 %, vegetable gardening at 1.2% ended by the trade of agricultural inputs 0.3%. Almost half of the entrepreneurs interviewed (46.1%) have more than 2 years of experience in their sector of activity, generally between 3 and 4 years. The DFS, partners of the young people in the sample, are CAECE JIGISEME, CVECA/ON, KAFO JIGINEW and NYESIGISO.The results of the logistic regression indicate that the motivation of young people to be their own boss, to value themselves, the experience in the activity, the financing of FIER and the Restitution of the amount received are significant at the threshold of 0.1%, 1 % and 5%. The Wald test confirms variables such as the motivation of the young person, the number of years in the activity, the structure of the financing, the personal contribution, the restitution and the start of production. Keyswords: Rural entrepreneurship, young, determinants, FIER, Segou, ACM. DOI: 10.7176/EJBM/15-6-02 Publication date:March 31st 202

Relationship between soil water content and crop yield under sahelian climate conditions: case study of Tougou experimental site in Burkina Faso

This study aims at assessing the relationship between soil water stock and the yield of agricultural practices in Tougou catchment located in northern Burkina Faso. It is a region that has experienced a significant and continuous degradation of its natural resources, especially soils, due to the climate variability and the rapid increase of the population. Areas allocated to subsistence agriculture are increasing at the expense of pastoral land. This degradation causes a change in processes and mechanisms that control ecological systems. In order to provide solutions to this issue, some agricultural practices have been implemented to improve crop yield. This is particularly the case of traditional techniques:za, stony line and half-moon, which can significantly improve the soil infiltration capacity and yield. Daily monitoring of soil moisture and pressure in experimental plots based on these agricultural practices show that half-moon and Za¯ provided good yield with 2180kg / ha and 1070 kg / ha respectively compared to that of the control plot with about 480 kg/ha. These important yields are due in large part to the improvement of the retention capacity of these soils, thus giving to crops the necessary water need for their development even in drought period

Scleroderma renal crisis in tropical region: two senegalese cases

Scleroderma renal crisis (SRC) is defined as the new onset of accelerated arterial hypertension and /or rapidly progressive oliguric renal failure during the course of systemic sclerosis. It is a rare but life-threatening complication. This formerly serious complication has got a considerable brighter outlook since the introduction of angiotensin converting enzyme inhibitors (ACE) however the mortality is still remaining high. We report two cases of SRC which to our knowledge are the firsts described in Dakar. They were two women aged 45 and 32 years, one of them was previously following for systemic sclerosis. Both of them had malignant hypertension associated with rapidly progressive renal failure, the other was put under corticosteroid therapy four months before SRC occurrence. The histological and laboratory finding showed thrombotic microangiopathy. The height blood pressure returned to normal value after treatment with ACE inhibitors. The final outcome was undesirable with the death of one after two months due to the hemodialysis discontinuation and persistence of renal failure in the other.Keywords: Scleroderma renal crisis, corticosteroids, thrombotic microangiopathy, Daka

Entomological impact of indoor residual spraying with pirimiphos-methyl: a pilot study in an area of low malaria transmission in Senegal.

BACKGROUND: Scaling-up of effective anti-malarial control strategies in Central-West region of Senegal has resulted in the sharp decline in malaria prevalence in this area. However, despite these strategies, residual malaria transmission has been observed in some villages (hot spots). The objective of this study was to assess the impact of indoor residual spraying (IRS) with pirimiphos-methyl on malaria transmission in hot spot areas. METHODS: The malaria vector population dynamics were monitored in each of the six selected villages (4 of which used IRS, 2 were unsprayed control areas) using overnight human landing catches (HLC) and pyrethrum spray catches (PSC). The host source of blood meals from freshly fed females collected using PSC was identified using the direct ELISA method. Females caught through HLC were tested by ELISA for the detection of Plasmodium falciparum circumsporozoite protein and Anopheles gambiae complex was identified using PCR. RESULTS: Preliminary data shown that the densities of Anopheles populations were significantly lower in the sprayed areas (179/702) compared to the control. Overall, malaria transmission risk was 14 times lower in the intervention zone (0.94) compared to the control zone (12.7). In the control areas, three Anopheles species belonging to the Gambiae complex (Anopheles arabiensis, Anopheles coluzzii and Anopheles melas) maintained the transmission, while only An. coluzzii was infective in the sprayed areas. CONCLUSION: The preliminary data from this pilot study showed that IRS with the CS formulation of pirimiphos-methyl is likely very effective in reducing malaria transmission risk. However, additional studies including further longitudinal entomological surveys as well as ecological and ethological and genetical characterization of vectors species and their populations are needed to better characterize the entomological impact of indoor residual spraying with pirimiphos-methyl in the residual transmission areas of Senegal

The role of mutuals and community-based insurance in social health protection systems: International experience on delegated functions

L’architecture institutionnelle sur laquelle repose la protection sociale de la santé varie selon les pays, de même que les acteurs et organismes impliqués. Dans certains pays, les sociétés mutualistes et organismes d’assurance maladie communautaire jouent un rôle central. Dans les années 1990, ces structures ont été promues, notamment parce qu’elles constituaient un moyen d’étendre la couverture de la sécurité sociale, en particulier en Afrique subsaharienne. Aujourd’hui, l’adoption du Programme de développement durable à l’horizon 2030 et une nouvelle volonté politique de parvenir à la couverture universelle ont conduit à s’interroger sur le rôle des mutuelles et organismes d’assurance maladie communautaire. Toutefois, peu d’études ont été consacrées à leur place dans les systèmes nationaux de sécurité sociale. Cette étude exploratoire, qui repose sur l’analyse de 49 documents couvrant 18 pays répartis dans le monde entier, est axée sur la délégation de fonctions en faveur des mutuelles/organismes d’assurance maladie communautaire dans les systèmes nationaux de protection sociale de la santé. Ses résultats révèlent la dynamique de cette délégation au fil du temps et des processus de mise en œuvre. Ils mettent en lumière des pistes de réflexion de nature à éclairer la formulation de l’action publique. -- Mots-clés : Mutualité ; protection sociale ; santé ; régimes de sécurité sociale ; assurance maladie; international

Reemergence of Sylvatic Dengue Virus in Southern Senegal, 2021

As part of the syndromic surveillance of fever in Senegal, the virology department at Institut Pasteur de Dakar (IPD) in collaboration with the Epidemiology Unit and the Senegalese Ministry of Health conducted syndromic surveillance of fever in Senegal. Sample are from all suspected arboviral infections patients attending any of the sentinel sites. Collected blood samples were sent on a weekly basis at WHOCC for arboviruses and hemorrhagic fever viruses for screening of seven medically important arboviruses, including dengue virus (DENV). From January to December 2021, 2010 suspected cases were received among them 124 for confirmed to be DENV+ by RT-qPCR attempt of serotyping led to the detection of atypical DENV case from Sare Yoba area (Kolda region) which is unable to be correctly assigned to a serotype by the available tools (TIB Molbiol Modular Dx Dengue typing kit). Performed genome sequencing et phylogenetic analysis leads to the identification of a sylvatic DENV-2 strain closely related to a virus previously detected in Guinee-Bissau in 2009. This finding constitutes proof of the contemporary circulation of DENV-2 strain belonging to the sylvatic cycle in addition to well-known epidemic strains; this adds a piece of complexity to dengue management in Senegal. Alarmingly, it calls for improved genomic surveillance of DENV to know the genetic diversity of circulating strains in order to strengthen future vaccination policies

Insecticide Resistance Profiling of Anopheles coluzzii and Anopheles gambiae Populations in the Southern Senegal: Role of Target Sites and Metabolic Resistance Mechanisms

The emergence and spread of insecticide resistance among the main malaria vectors is threatening the effectiveness of vector control interventions in Senegal. The main drivers of this resistance in the Anopheles gambiae complex (e.g., An. gambiae and Anopheles coluzzii) remains poorly characterized in Senegal. Here we characterized the main target site and metabolic resistances mechanisms among the An. gambiae and An. coluzzii populations from their sympatric and allopatric or predominance area in Senegal. Larvae and pupae of An. gambiae s.l. were collected, reared to adulthood, and then used for insecticides susceptibility and synergist assays using the WHO (World Health Organisation) test kits for adult mosquitoes. The TaqMan method was used for the molecular characterization of the main target site insecticide resistance mechanisms (Vgsc-1014F, Vgsc-1014S, N1575Y and G119S). A RT-qPCR (Reverse Transcriptase-quantitative Polymerase Chaine Reaction) was performed to estimate the level of genes expression belonging to the CYP450 (Cytochrome P450) family. Plasmodium infection rate was investigated using TaqMan method. High levels of resistance to pyrethroids and DDT and full susceptibility to organophosphates and carbamates where observed in all three sites, excepted a probable resistance to bendiocarb in Kedougou. The L1014F, L1014S, and N1575Y mutations were found in both species. Pre-exposure to the PBO (Piperonyl butoxide) synergist induced a partial recovery of susceptibility to permethrin and full recovery to deltamethrin. Subsequent analysis of the level of genes expression, revealed that the CYP6Z1 and CYP6Z2 genes were over-expressed in wild-resistant mosquitoes compared to the reference susceptible strain (Kisumu), suggesting that both the metabolic resistance and target site mutation involving kdr mutations are likely implicated in this pyrethroid resistance. The presence of both target-site and metabolic resistance mechanisms in highly pyrethroid-resistant populations of An. gambiae s.l. from Senegal threatens the effectiveness and the sustainability of the pyrethroid-based tools and interventions currently deployed in the country. The Kdr-west mutation is widely widespread in An. coluzzii sympatric population. PBO or Duo nets and IRS (Indoor Residual Spraying) with organophosphates could be used as an alternative measure to sustain malaria control in the study area