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Application of Machine Learning Methods on Climate Data and Commercial Microwave Link Attenuations for Estimating Meteorological Visibility in Dusty Condition

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Engineering（科研） 2022年第2期14卷 85-93页

作者： Wend Yam serge Boris Ouedraogo Sibiri Tiemounou Moumouni Djibo Ali Doumounia serge roland sanou Moumouni Sawadogo Idrissa Guira François Zougmore Laboratoire Matériaux et Environnement Université Joseph KI-ZERBO Ouagadougou Burkina Faso Institut du Génie Informatique et Télécommunications Ecole Polytechnique de Ouagadougou Ouagadougou Burkina Faso Ecole Normale Supérieure Koudougou Burkina Faso Autorité de Régulation des Communications électroniques et des Postes Ouagadougou Burkina Faso Telecel Faso SA Ouagadougou Burkina Faso

Accurately measuring meteorological visibility is an important factor in road, sea, rail, and air transportation safety, especially under visibility-reducing weather events. This paper deals with the application of Machine Learning methods to estimate meteorological visibility in dusty conditions, from the power levels of commercial microwave links and weather data including temperature, dew point, wind speed, wind direction, and atmospheric pressure. Three well-known Machine Learning methods are investigated: Decision Trees, Random Forest, and Support Vector Machines. The correlation coefficient and the mean square error, between the visibility distances estimated by Machine Learning methods and those provided by Burkina Faso weather services are computed. Except for the SVM method, all the other methods give a correlation coefficient greater than 0.90. The Random Forest method presents the best result both in terms of correlation coefficient (0.97) and means square error (0.60). For this last method, the best variables that explain the model are selected by evaluating the weight of each variable in the model. The best performance is obtained by considering the attenuation of the microwave signal and the dew point.

关键词： Meteorological Visibility Commercial Microwave Link Machine Learning Climate Parameters Dust Attenuation

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Indirect Electroanalysis of 3-Methyl-4-Nitrophenol in Water Using Carbon Fiber Microelectrode Modified with Nickel Tetrasulfonated Phthalocyanine Complex

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Materials Sciences and Applications 2024年第2期15卷 25-35页

作者： Yibor Fabrice roland Bako serge Foukmeniok Mbokou Boukaré Kaboré Issa Tapsoba Maxime Pontié Laboratoire de Chimie Analytique Environnementale et Bio-organique (LCAEBiO) Département de Chimie Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Institut des Sciences et de Technologie Ecole Normale Supérieure Ouagadougou Burkina Faso Group of analysis and Processes Analysis (GA&P) Département de Chimie Université d’Angers Angers France Laboratoire de Sciences et Technologies (LaST) Université Thomas SANKARA Ouagadougou Burkina Faso

Electrochemical detection of 3-methyl-4-nitrophenol (MNP) in direct phenol oxidation occurs at high potentials and generally leads to progressive passivation of the electrochemical sensor. This study describes the use of a carbon fiber microelectrode modified with a tetrasulfonated nickel phthalocyanine complex for the detection of MNP at a lower potential than that of direct phenol oxidation. The MNP voltammogram showed the presence of an anodic peak at -0.11 V vs SCE, corresponding to the oxidation of the hydroxylamine group generated after the reduction of the nitro group. The effect of buffer pH on the peak current and SWV parameters such as frequency, scan increment, and pulse amplitude were studied and optimized to have better electrochemical response of the proposed sensor. With these optimal parameters, the calibration curve shows that the peak current varied linearly as a function of MNP concentration, leading to a limit of detection (LoD) of 1.1 μg/L. These results show an appreciable sensitivity of the sensor for detecting the MNP at relatively low potentials, making it possible to avoid passivation phenomena.

关键词： 3-Methyl-4-Nitrophenol Carbon Fiber Microelectrode Nickel Tetrasulfonated Phthalocyanine Indirect Electroanalysis Square Wave Voltammetry

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Distribution and Contamination of Arsenic in Fish, Gastropods and Bivalves in the Aby and Tendo Lagoons in East of Ivory Coast

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Journal of Environmental Protection 2024年第3期15卷 246-264页

作者： Kouakou serge Kouassi Stéphane Jean Claon Kossonou roland N’Guettia Séri Kipré Laurent Dakouo Guei Jokebed Djaman Allico Joseph Laboratory of Biology and Health University of F&eacutelix Houphou&eumlt-Boigny Abidjan C&ocircte d’Ivoire Department of Analytical Sciences and Public Health Faculty of Pharmaceutical and Biological Sciences University of F&eacutelix Houphou&eumlt-Boigny Abidjan C&ocircte d’Ivoire Laboratory of Environmental Sciences (LSE) University of Nangui Abrogoua Abidjan C&ocircte d’Ivoire Department of Medical and Fundamental Biochemistry Institut Pasteur of C&ocircte d’Ivoire Abidjan C&ocircte d’Ivoire

Lagoons are ecosystems for biodiversity and the livelihoods of coastal communities. The main objective of the study was to analyze the variability of arsenic concentrations in gastropods and bivalves in the Aby and Tendo lagoons, taking into account spatial, seasonal and hydrological variations. The study was carried out in four stages spread over two successive hydroclimatic cycles, including two seasons during the rainy season and two more during the dry season. The samples were taken in two areas of the Aby and Tendo lagoons. Arsenic levels were measured by ICP-MS. The results showed that mean arsenic concentrations in the muscles of organisms in Aby Lagoon ranged from 0.01 to 1.26 μg As/g, with a mean and median of 0.17 and 0.06 μg As/g, respectively. Fish had the highest levels of arsenic, followed by crustaceans, while molluscs and plants had lower and comparable concentrations of As. Arsenic concentrations in tilapia and jawbones varied significantly between sites and seasons, with higher concentrations at Tendo and during the rainy season. Arsenic concentrations in gastropods and bivalves were significantly higher than those of other species, with averages of 0.74 and 1.03 mg As/kg, respectively.

关键词： Arsenic Pollution Fish Gastropods Lagoons Health Effect

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Assessment of Selenium Contamination in Sediments of the Aby and Tendo Lagoons in Côte d’Ivoire

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International Journal of Geosciences 2024年第4期15卷 334-349页

作者： Stéphane Jean Claon Kouakou serge Kouassi Kossonou roland N’Guettia M’bassidjé Arsène Seka Guei Jokebed Dakouo Allico Joseph Djaman Kouakou Luc Kouadio Analytical Sciences and Public Health Department University of F&#233lix Houphou&#235t-Boigny Abidjan C&#244te d&#8217Ivoire Water Quality Control and Analysis Laboratory (LACQUE) Office National de l&#8217Eau Potable (ONEP) Abidjan C&#244te d&#8217Ivoire Biology and Health Laboratory University of F&#233lix Houphou&#235t-Boigny Abidjan C&#244te d&#8217Ivoire Laboratory of Environmental Sciences (LSE) University of Nangui Abrogoua Abidjan C&#244te d&#8217Ivoire Department of Medical and Fundamental Biochemistry Institut Pasteur of C&#244te d&#8217Ivoire Abidjan C&#244te d&#8217Ivoire

Selenium is a trace element that can have both beneficial and harmful effects on aquatic life. The Aby Lagoon is a coastal environment in Côte d’Ivoire that receives selenium inputs from various natural and anthropogenic sources. The aim of this study was to assess the levels of selenium in the sediments of the Aby Lagoon and its tributaries, the Tanoe River and the Tendo Lagoon, and to examine the spatial and seasonal variations of selenium concentrations. Sediment samples were collected from different sites and seasons, and selenium concentrations were measured by atomic fluorescence spectrometry. The results showed that the average concentration of selenium in the sediments of the Aby Lagoon was 0.82 mg/kg, indicating moderate contamination. The concentration of selenium varied between sites and seasons, with higher values in the channel of the Tendo Lagoon and during the dry season. The study highlighted the complexity of selenium dynamics in aquatic ecosystems, and the need to take into account seasonal and spatial variability as well as interactions between environmental factors. The study also suggested potential ecotoxicological risks for some sensitive organisms in certain areas of the lagoon. This study contributes to the knowledge of the dynamics of selenium in lagoon ecosystems and to the assessment of the environmental risks associated with its presence.

关键词： Tropical Estuarine Selenium Sediments Aby Lagoon Seasonal Distribution

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Assessment of Nitrates and Nitrites in Borehole Water from the Southern and the Northern Region of Côte d’Ivoire (West Africa)

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Open Journal of Modern Hydrology 2024年第2期14卷 87-105页

作者： Jean Stéphane Claon Kouassi Kouakou serge Sérikipré Laurent Seka M’Bassidjé Arsène N’Guettia Kossonou roland Traoré Aïcha Djamanallico Joseph Kouadio Kouakou Luc Analytical Sciences and Public Health Department University of Félix Houphou&#235t-Boigny Abidjan C&#244te d’Ivoire Water Quality Control and Analysis Laboratory (LACQUE) Office National de l’Eau Potable (ONEP) Abidjan C&#244te d’Ivoire Biology and Health Laboratory University of Félix Houphou&#235t-Boigny Abidjan C&#244te d’Ivoire Department of Medical and Fundamental Biochemistry Institut Pasteur of C&#244te d’Ivoire Abidjan C&#244te d’Ivoire Laboratory of Environmental Sciences (LSE) University of Nangui Abrogoua Abidjan C&#244te d’Ivoire

This study aimed to evaluate the quality of water from village boreholes by measuring physicochemical parameters such as nitrates, nitrites, and total organic carbon (TOC). Forty-five (45) village pumps from the Southern (Basse Côte) and the Northern (Korhogo) region of Cte d’Ivoire (west Africa) were sampled. Physicochemical parameters such as temperature, pH, conductivity at 25˚C, and turbidity were determined in situ, while nitrite and nitrate were analyzed according to ISO 10304-1 (2007) standard and total organic carbon (TOC) by NF EN 1484 (1997) standard. The results showed that the borehole waters of the Basse Côte and Korhogo analyzed are acidic, with an average temperature of 27.51˚C ± 0.16˚C and 29.95˚C ± 0.51˚C respectively for the Basse Côte and Korhogo regions. The borehole waters of the Basse Côtedo not contain nitrites, while those of Korhogo have average nitrite contents of 0.32 mg/l. The average nitrate rate in the waters of the Basse Côte and Korhogo are 12.08 ± 2.11 mg/l and 11.03 ± 3.18 mg/l respectively. The average TOC concentration of the waters of the Basse Côte is 1.28 ± 0.32 mg/l and that of Korhogo is 0.56 ± 0.09 mg/L. The study showed that the borehole waters of the Basse Côte and Korhogo have average temperatures between 27.4˚C and 29.95˚C with a slightly acidic pH value and acceptable salinity. The TOC concentrations obtained at the different sampling points were all below the French standard (2 mg/L) except for certains pumps of the Basse Côte. The water samples from the Basse Côte were devoid of nitrite. On the other hand, those from Korhogo revealed the presence of nitrite. Also, the borehole waters of the regions of the Basse Côte and Korhogo contain relatively high nitrate contents, presumably due to anthropometric activity. Overall, our study on the quality of drinking water showed that the waters analyzed are in compliance with international standards and safe for consumption.

关键词： Drinking Water pH Turbidity TOC Nitrates Nitrites Health Effect

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Traditional Healer’s Medicinal Practice Survey and Clinical Evidence Assessment of “YIKI”: An Antimalarial Phytomedicine Recipe from Bobo-Dioulasso, Burkina Faso

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Pharmacology & Pharmacy 2024年第7期15卷 248-267页

作者： Zachari Kabre Rakiswende serge Yerbanga Aminata Fofana roland Nâg-Tiero Meda Anyirekun Fabrice Some Alassane Haro Natacha A. J. A. Boro Fazhira B. Ye Benjamin Kouliga Koama Sami Eric Kam Eliasse Zongo Hadidjatou Belèm Windmi Kagambèga Florence Fournet Georges A. Ouedraogo Jean-Bosco Ouedraogo Institut de Recherche en Sciences de la Sant Direction Rgionale de lOuest Bobo-Dioulasso Burkina Faso Laboratoire de Recherche et dEnseignement en Sant et Biotechnologies Animales Universit Nazi BONI Bobo-Dioulasso Burkina Faso Institut des Sciences et Techniques Bobo-Dioulasso Burkina Faso Laboratoire de Recherche en Bactriologie INSP/Centre MURAZ Bobo-Dioulasso Burkina Faso Maladies Infectueuses et Vecteurs: Ecologie Gntique Evolution et Contrle (MIVEGEC) Institut de Recherche pour le Dveloppement Universit de Monpellier Montpellier France

YIKI is an antimalarial phytomedicine used by a traditional healer to treat malaria in Bobo-Dioulasso. However, there is no scientific evidence to support its use by local populations. The aim of this study was to identify the medicinal practices of the healer holder of YIKI and assess the clinical evidence of its phytomedicine in the uncomplicated malaria treatment. Ethnomedical survey based on a semi-structured and open questionnaire was conducted from October to December 2019 with the healer. Malaria knowledge and diagnosis methods, patient treatment and monitoring, and recipe formulation steps were surveyed. Moreover, thick and thin blood smears were taken, haemoglobin levels and temperature of consenting patients were measured before treatment, mid-treatment and at the end of treatment. The survey revealed that the healer has a good knowledge of malaria symptoms and his diagnosis is based on observation and physical examination of patients. The healer’s malaria diagnosis was rudimentary and had accuracy problems, with only 62.79% of malaria cases confirmed by microscopy. The formulation of YIKI and its use to treat malaria follow a standard process for plant harvesting, powder quantities and posology, but do not use any reproducible parameters for dose adjustment. Forty-three patients diagnosed and treated by the healer participated in the study. Laboratory results revealed 27 Plasmodium falciparum infection cases, including 2 with parasitaemia ≥ 200,000 p/µl blood. 25 patients were selected for therapeutic evidence assessment. There was a 48% elimination of parasites, a 28% parasitaemia decrease without complete cure, with gametocytogenesis in some patients, and a 24% parasitaemia increase. Haemoglobin and temperature results suggested that YIKI was not cytotoxic and reduced fever. Encouraging preliminary results have been obtained, but in view of the low number of patients, further YIKI efficacy and toxicity studies will be necessary for patient safety.

关键词： Antimalarial-Phytomedicine Efficacy Traditional Practices Bobo-Dioulasso

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Cardio-Renal Syndrome: Frequency and Associated Factors in the Abidjan Heart Institute’s Medical Department

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Open Journal of Nephrology 2023年第3期13卷 292-305页

作者： Diane Meto Arnaud Ekou serge D. Konan Rodrigue Hazoume Kolo Claude Ouattara roland Nguetta Hubert Yao Nephrology Department of the Teaching Hospital of Treichville Abidjan Ivory Coast Heart Institute of Abidjan Abidjan Ivory Coast

Introduction: Cardio-renal syndrome (CRS) is a pathophysiological disorder of the heart and kidneys in which acute or chronic dysfunction of one organ can lead to acute or chronic dysfunction of the other. In Africa, particularly in C?te d’Ivoire, the incidence of cardio-renal syndrome is not precisely known. The aim of this study was to assess the frequency of CRS and to contribute to a better understanding of the condition in the medical department of the Abidjan Heart Institute. Materials and Methods: We conducted a prospective analytical study including all patients with heart failure hospitalised in the medicine department of the Abidjan Heart Institute from March to October 2020. Data were analysed using SPSS software version 22. Results: We included 111 patients in the study. The incidence of CRS was 64%, with a predominance of males (sex ratio 1.8). The mean age was 53 ± 15 years. Patients’ medical history was dominated by hypertension (56.8%), diabetes (15%), dyslipidaemia (18%), obesity (17.1%) and smoking (14.4%). The main causes of heart failure were dilated cardiomyopathy (22.8%) and ischaemic heart disease (21.4%). Symptomatology was mainly congestive heart failure (42.8%). Mean evaluated clearance (MDRD) was 39.9 ± 17.1 ml/min/m2. Doppler echocardiography showed a decrease in left ventricular ejection fraction in 74.3% of patients. Factors statistically associated with the occurrence of cardio-renal syndrome were: age > 60 years (p = 0.04), diabetes (p = 0.03), arterial hypertension (p = 0.001) and Hb Conclusion: The cardio-renal syndrome is a reality and marks an important point in the evolution of cardiac and renal diseases. It is highly frequent in the medical department of the Abidjan Heart Institute, as well as a high rate of CKD.

关键词： Cardio-Renal Syndrome Heart Failure Renal Failure

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Epidemiology of carbapenem-resistant Acinetobacter baumannii colonization in neonatal intensive care units:A systematic review and meta-analysis

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World Journal of Meta-Analysis 2024年第1期12卷 1-10页

作者： Donatien serge Mbaga Sebastien Kenmoe Seraphine Nkie Esemu Arnol Bowo-Ngandji Nene Kaah Keneh Jane-Francis Tatah Kihla Akoachere Hortense Kamga Gonsu roland Ndip Ndip Jean Thierry Ebogo-Belobo Cyprien Kengne-Ndé Nicholas Tendongfor Jean Paul Assam Assam Lucy Mande Ndip Jacky Njiki Bikoï Sara Honorine Riwom Essama Department of Microbiology The University of Yaounde IYaounde 00237Cameroon Department of Microbiology and Parasitology University of BueaBuea 00237Cameroon Faculty of Medicine and Biomedical Sciences The University of Yaounde IYaounde 00237Cameroon Center for Research in Health and Priority Pathologies Institute of Medical Research and Medicinal Plants StudiesYaounde 00237Cameroon Epidemiological Surveillance Evaluation and Research UnitNational AIDS Control CommitteeDouala 00237Cameroon

BACKGROUND The rising prevalence of carbapenem-resistant Acinetobacter baumannii(CRAB)in neonatal intensive care units(NICUs)represents an escalating challenge in healthcare settings,particularly in managing hospital-acquired infections(HAIs).Studies across various World Health Organization regions have documented a significant incidence of CRAB-related HAIs,with rates as high as 41.7 cases per 1000 patients in ICUs,accounting for 13.6%of all *** infections pose a doubled mortality risk compared to infections with carbapenem-susceptible Acinetobacter baumannii.A particularly concerning aspect of CRAB colonization is its asymptomatic nature,enabling its transmission through healthcare workers(HCWs)or the NICU environment to vulnerable neonates with developing immune *** To explore the prevalence of CRAB colonization in NICUs,focusing on neonates,healthcare workers,and the environmental samples,to enhance epidemiological understanding and inform targeted *** We conducted according to PRISMA 2020 checklist guidelines,a comprehensive literature search across multiple databases including MEDLINE(Ovid),EMBASE(Ovid),Global Health(Ovid),Web of Science,and Global Index *** were selected based on predetermined criteria,primarily involving neonates,HCWs,and environmental swabs,using culture or molecular methods to detect CRAB *** excluded studies that did not specifically focus on NICUs,were duplicates,or lacked necessary *** study selection and quality assessment were conducted independently by two *** extraction involved collecting comprehensive details about each *** statistical analysis used a random-effects model to calculate the pooled prevalence and confidence intervals,stratifying results by regional *** assessed study heterogeneity using Cochran's Q statistic and I²statistic,with regression tests employed to evaluate potential publication *** We analyzed 737 records from f

关键词： Colonization Carbapenem-resistant Acinetobacter baumannii Neonatal intensive-care unit

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Contribution of COVID-19 Pandemic on the Human Development of Young Researchers at Institut Pasteur de Côte d’Ivoire

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Advances in Infectious Diseases 2022年第4期12卷 646-655页

作者： Yao serge Stéphane Kouamé Kouassi Bernadin Kragbe Daugbley Guy roland Golly Koffi Julien Diplo Tchepé Flore Bernadette Anné Bléssa Jean Claude Dosso Mireille Department of Parasitology-Mycology (IPCI) Institut Pasteur de C&#244 te d’Ivoire (IPCI) Abidjan C&#244 te d’Ivoire Department of Health Environment Institut Pasteur de C&#244 te d’Ivoire (IPCI) Abidjan C&#244 te d’Ivoire Reception and Collection Unit Institut Pasteur de C&#244 te d’Ivoire (IPCI) Abidjan C&#244 te d’Ivoire Department of Technique and Technology (IPCI) Institut Pasteur de C&#244 te d’Ivoire (IPCI) Abidjan C&#244 te d’Ivoire Department of Bacteriology and Virology (IPCI) Institut Pasteur de C&#244 te d’Ivoire (IPCI) Abidjan C&#244 te d’Ivoire

The response to the COVID-19 pandemic has compelled Institut Pasteur de Cote d’Ivoire (IPCI) to set up strategies for an outstanding mobilisation of human resources to fight against it. Among these strategies, we can quote the screening of people requesting COVID-19 tests at IPCI for emergency travel after the lifting of flight restrictions. Newly recruited Young researchers at IPCI, as well as Ph.D. students and trainees, were mobilised. This document describes firstly, the benefits, knowledge acquired, and difficulties encountered, and secondly, recommendations to be followed for a future large-scale epidemic. This study helped to outline some achievements, such as upgrading the talents of young researchers, strong collaboration between young researchers from different fields, and between IPCI and other institutions. The lessons learned are numerous, including mood and stress management. The difficulties encountered during this study are mainly misunderstandings, increased workload, and insufficient awareness of COVID-19 travel test procedures. These results are relevant for a possible pandemic management in our country, as well as in other African countries.

关键词： Pandemic COVID-19 Human Development Management Travelers

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Ascites of Great Abundance Revealing a Nephrotic Congenital Syndrome at the University Teaching Hospital of Bouaké: About a Case

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Open Journal of Pediatrics 2018年第1期8卷 19-24页

作者： Kouadio Vincent Asse Kouassi Christian Yao Richard Azagoh-Kouadio serge Gohi Bi Irie Kossonou roland Yeboua John Patrick Yenan Koko Aude Aka-Tanoh Christelle Avi Paediatric Ward of University and Teaching Hospital of Bouake Bouaké Cote d’Ivoire Paediatric Ward of University and Teaching Hospital of Treichville Abidjan Cote d’Ivoire Polyvalent Reanimation Ward of University and Teaching Hospital of Bouaké Bouaké Cote d’Ivoire

Congenital nephrotic syndrome (CNS) is defined as the presence of proteinuria > 50 mg/kg/24h associated with a protein concentration g/L or albuminemia 30 g/L in an infant less than 3 months old. The CNS is rare, of various clinical forms dominated by the Finnish type caused by a mutation of the NPHS1 gene located on chromosome 19. The edematous syndrome is the most common mode of discovery. We report a case discovered in an infant of 50 days admitted for ascites of great abundance. The aim of this study was to describe the main epidemiological, diagnostic, therapeutic and evolutionary aspects of this syndrome. Improving the prognosis of this condition requires advocacy with the political authorities of Cote d’Ivoire to provide Teaching Hospital for the resources needed to perform kidney transplantation.

关键词： Ascites Congenital Nephrotic Syndrome Finnish Type Renal Transplantation Cote d’Ivoire

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