The conversion of forest land to other types of land cover is one of the major issues in the global fight against climate change. Understanding the direct and indirect factors of these conversions from local studies i...The conversion of forest land to other types of land cover is one of the major issues in the global fight against climate change. Understanding the direct and indirect factors of these conversions from local studies in the tropics is essential to project the future impact of human activities on the preservation of tropical forests in general and the forests of the Republic of Congo in particular. This study, conducted in five localities with different socioeconomic contexts in the Republic of Congo, aims to analyze the variability of drivers of deforestation and forest degradation linked to urbanization in the Congo Basin. Using a series of land cover maps from the years 1986, 2003 and 2019 for the cities of Ouesso, Pokola, Ngombe, Impfondo and Dongou, as well as field data and socio-economic information collected from local and central administrations, a unique model has been developed to understand the explanatory patterns of forest loss. Deforestation around urban centers is mainly due to urban agriculture due to population growth, as well as the spatial expansion of cities, which have a major impact on the stability and integrity of forests. Shifting agriculture is the main direct cause of deforestation and forest degradation, representing 48% of the total sample, followed by the collection of wood fuel (22%), the collection of construction wood (19%), illegal logging (6%) and urban expansion (5%). Forecasts indicate that forest loss around major cities will increase by 487, 20 ha to 5266, 73 ha by 2050 compared to the base year of 2019. This study highlights the need for a new system of land management and poverty alleviation of local populations to ensure the stability of the Congo Basin tropical forests around large and small African cities.展开更多
For a set S of real numbers, we introduce the concept of S-almost automorphic functions valued in a Banach space. It generalizes in particular the space of Z-almost automorphic functions. Considering the space of S-al...For a set S of real numbers, we introduce the concept of S-almost automorphic functions valued in a Banach space. It generalizes in particular the space of Z-almost automorphic functions. Considering the space of S-almost automorphic functions, we give sufficient conditions of the existence and uniqueness of almost automorphic solutions of a differential equation with a piecewise constant argument of generalized type. This is done using the Banach fixed point theorem.展开更多
In this paper, we give sufficient conditions for the existence and uniqueness of asymptotically w-antiperiodic solutions for a nonlinear differential equation with piecewise constant argument in a Banach space when w ...In this paper, we give sufficient conditions for the existence and uniqueness of asymptotically w-antiperiodic solutions for a nonlinear differential equation with piecewise constant argument in a Banach space when w is an integer. This is done using the Banach fixed point theorem. An example involving the heat operator is discussed as an illustration of the theory.展开更多
Spatio-temporal variability and dynamics in Sahelian agro-pastoral zones make each local situation a special case. These specificities must be considered to guide the dissemination of agricultural options with a view ...Spatio-temporal variability and dynamics in Sahelian agro-pastoral zones make each local situation a special case. These specificities must be considered to guide the dissemination of agricultural options with a view to sustainable development. The territorial scale of municipalities is not sufficient for this necessary contextualization;the scale of the “village terroir” seems to be a better option. This is the hypothesis we put forward in the framework of the Global Collaboration for Resilient Food Systems program (CRFS), i.e. local context is spatially defined by village terroir. The study is based on data collected through participatory mapping and surveys in “village terroirs” in three regions of Niger (Maradi, Dosso and Tillabéri). Then the links between farm managers and their cultivated land, as well as the spatio-temporal dynamics of local context are analyzed. This study provides evidence of the existence and functional usefulness of the village terroir for farmers, their land management and their activities. It demonstrates the usefulness of contextualizing agricultural options at this scale. Their analysis elucidates the links between “terroirs village” and the specific functioning of the agrosocio-ecosystems acting on each of them, thus laying the systemic and geographical foundations for a model of the spatio- temporal dynamics of “village terroirs”. This initial work has opened up new perspectives in modeling and sustainable development.展开更多
The lancehead (Bothrops lanceolatus) is a poisonous snake endemic to Martinique, an island in the Lesser Antilles arc. Today, this snake is on the verge of extinction. The recorded number of snakes killed yearly betwe...The lancehead (Bothrops lanceolatus) is a poisonous snake endemic to Martinique, an island in the Lesser Antilles arc. Today, this snake is on the verge of extinction. The recorded number of snakes killed yearly between 1970 and 2002 decreased by 97%. Despite the production of an antivenom in 1993, the local authorities set up a financial reward to encourage the eradication of lancehead snakes. Today the local population still perceives the snake as a threat, due to its fatal venom and its fierce behaviour. The case study of the lancehead in Martinique highlights the need to develop integrated strategies to conserve species of poisonous snakes on densely populated islands. This requires innovative, cross-sectoral strategies that involve decision-makers working along with multi-disciplinary scientists. Approaching the complexity of ecosystems through the socio-ecological prism implies, conversely, linking up the domains of science and technology, life and environmental sciences, and human and social sciences, through interactions based on sharing common展开更多
Background: Recently, despite the steady decline in the tuberculosis (TB) epidemic globally, school TB outbreaks have been frequently reported in China. This study aimed to quantify the transmissibility ofMycobacteriu...Background: Recently, despite the steady decline in the tuberculosis (TB) epidemic globally, school TB outbreaks have been frequently reported in China. This study aimed to quantify the transmissibility ofMycobacterium tuberculosis (MTB) among students and non-students using a mathematical model to determine characteristics of TB transmission.Methods: We constructed a dataset of reported TB cases from four regions (Jilin Province, Xiamen City, Chuxiong Prefecture, and Wuhan City) in China from 2005 to 2019. We classified the population and the reported cases under student and non-student groups, and developed two mathematical models [nonseasonal model (Model A) and seasonal model (Model B)] based on the natural history and transmission features of TB. The effective reproduction number (R(eff)) of TB between groups were calculated using the collected data.Results: During the study period, data on 456,423 TB cases were collected from four regions: students accounted for 6.1% of cases. The goodness-of-fit analysis showed that Model A had a better fitting effect (P < 0.001). The average R_(eff) of TB estimated from Model A was 1.68 [interquartile range (IQR): 1.20–1.96] in Chuxiong Prefecture, 1.67 (IQR: 1.40–1.93) in Xiamen City, 1.75 (IQR: 1.37–2.02) in Jilin Province, and 1.79 (IQR: 1.56–2.02) in Wuhan City. The average R_(eff) of TB in the non-student population was 23.30 times (1.65/0.07) higher than that in the student population.Conclusions: The transmissibility of MTB remains high in the non-student population of the areas studied, which is still dominant in the spread of TB. TB transmissibility from the non-student-to-student-population had a strong influence on students. Specific interventions, such as TB screening, should be applied rigorously to control and to prevent TB transmission among students.展开更多
What is already known about this topic?Given the challenges presented by drug-resistant strains of tuberculosis(TB)and the rising mobility of the population,achieving the objective of eradicating TB appears uncertain....What is already known about this topic?Given the challenges presented by drug-resistant strains of tuberculosis(TB)and the rising mobility of the population,achieving the objective of eradicating TB appears uncertain.What is added by this report?The examination of TB incidence trends in 10 highburden countries(HBCs)indicated a steady rise in cases,with India and China jointly accounting for nearly 70%of the burden.Projections for the future show diverse trajectories in these countries,with potential difficulties in reaching the TB elimination target,especially in Nigeria,Congo,and South Africa.What are the implications for public health practice?The number of TB cases is on the rise.It is crucial to learn from successful strategies to improve TB prevention and control worldwide through collaborative efforts.展开更多
Summary What is already known about this topic?In China,patients with echinococcosis receive complimentary healthcare services,such as medical treatment,diagnostic examinations,and follow-up care.Despite this,no studi...Summary What is already known about this topic?In China,patients with echinococcosis receive complimentary healthcare services,such as medical treatment,diagnostic examinations,and follow-up care.Despite this,no studies have been conducted to assess the quality of patient management to date.What is added by this report?This study reviewed the medical records of 899 patients who underwent albendazole treatment across 10 endemic counties.Out of 634 evaluable patient files,the proportion of patients with a ratio of actual followup and reexamination times to theoretical follow-up and reexamination times≥0.8 were both low(21.92%and 23.19%,respectively).What are the implications for public health practices?This study identified weaknesses and specific issues in patient management and proposed feasible recommendations to enhance patient file documentation,follow-up,and reexamination.展开更多
Background Echinococcosis is an infectious parasitic disease that is extremely harmful to human health.Albendazole is provided free of charge to patients requiring medication under the central government finance trans...Background Echinococcosis is an infectious parasitic disease that is extremely harmful to human health.Albendazole is provided free of charge to patients requiring medication under the central government finance transfer payment scheme for echinococcosis control and prevention in China.Our aim is to monitor the state of patient medication and its therapeutic impact,which will help improve medication compliance and the therapeutic effect.Methods Random cluster sampling was used to select 10 echinococcosis-endemic counties in China,and all alben-dazole-treated patients in these counties were investigated.The chi-square and Kruskal-Wallis tests were used to com-pare two or more rates or constituent ratios,and multiple logistic regression analysis was used to identify the influ-encing factors.The records of patients were reviewed to obtain the initial diagnosis results as well as the most recent follow-up results and time,and efficacy was assessed.Results We examined 899 patient files treated with albendazole in 10 endemic counties.Of the 582 evaluable files,7.9%did not take albendazole,and 69.2%did not take albendazole regularly.Only 22.9%took albendazole regularly.Of the 536 patients who took albendazole,242 exhibited adverse reactions.Patients who were Tibetan,herdsmen,received no formal education,used emulsion,and exhibited adverse reactions demonstrated poor compliance.A total of 174 patients with cystic echinococcosis received their most recent imaging follow-up results within one year of the investigation date.Among them,9 patients met the criteria for cure,accounting for 5.2%;56 patients showed effectiveness,accounting for 32.2%;105 patients were deemed ineffective,accounting for 59.8%;5 patients experienced recurrence,accounting for 2.9%.Conclusions Albendazole medication compliance in patients with echinococcosis is not ideal.We must prioritize health education and promotion for Tibetans,herdsmen,and those without formal education.Patients who adhered to their medication regimen achieved higher rates of cure and effectiveness.To improve medication compliance and effi-cacy,it is particularly important to improve communication and medication guidance for patients receiving emulsions and those with adverse reactions after taking albendazole.Simultaneously strengthen patients'attention to follow-up and re-examination.展开更多
文摘The conversion of forest land to other types of land cover is one of the major issues in the global fight against climate change. Understanding the direct and indirect factors of these conversions from local studies in the tropics is essential to project the future impact of human activities on the preservation of tropical forests in general and the forests of the Republic of Congo in particular. This study, conducted in five localities with different socioeconomic contexts in the Republic of Congo, aims to analyze the variability of drivers of deforestation and forest degradation linked to urbanization in the Congo Basin. Using a series of land cover maps from the years 1986, 2003 and 2019 for the cities of Ouesso, Pokola, Ngombe, Impfondo and Dongou, as well as field data and socio-economic information collected from local and central administrations, a unique model has been developed to understand the explanatory patterns of forest loss. Deforestation around urban centers is mainly due to urban agriculture due to population growth, as well as the spatial expansion of cities, which have a major impact on the stability and integrity of forests. Shifting agriculture is the main direct cause of deforestation and forest degradation, representing 48% of the total sample, followed by the collection of wood fuel (22%), the collection of construction wood (19%), illegal logging (6%) and urban expansion (5%). Forecasts indicate that forest loss around major cities will increase by 487, 20 ha to 5266, 73 ha by 2050 compared to the base year of 2019. This study highlights the need for a new system of land management and poverty alleviation of local populations to ensure the stability of the Congo Basin tropical forests around large and small African cities.
文摘For a set S of real numbers, we introduce the concept of S-almost automorphic functions valued in a Banach space. It generalizes in particular the space of Z-almost automorphic functions. Considering the space of S-almost automorphic functions, we give sufficient conditions of the existence and uniqueness of almost automorphic solutions of a differential equation with a piecewise constant argument of generalized type. This is done using the Banach fixed point theorem.
文摘In this paper, we give sufficient conditions for the existence and uniqueness of asymptotically w-antiperiodic solutions for a nonlinear differential equation with piecewise constant argument in a Banach space when w is an integer. This is done using the Banach fixed point theorem. An example involving the heat operator is discussed as an illustration of the theory.
文摘Spatio-temporal variability and dynamics in Sahelian agro-pastoral zones make each local situation a special case. These specificities must be considered to guide the dissemination of agricultural options with a view to sustainable development. The territorial scale of municipalities is not sufficient for this necessary contextualization;the scale of the “village terroir” seems to be a better option. This is the hypothesis we put forward in the framework of the Global Collaboration for Resilient Food Systems program (CRFS), i.e. local context is spatially defined by village terroir. The study is based on data collected through participatory mapping and surveys in “village terroirs” in three regions of Niger (Maradi, Dosso and Tillabéri). Then the links between farm managers and their cultivated land, as well as the spatio-temporal dynamics of local context are analyzed. This study provides evidence of the existence and functional usefulness of the village terroir for farmers, their land management and their activities. It demonstrates the usefulness of contextualizing agricultural options at this scale. Their analysis elucidates the links between “terroirs village” and the specific functioning of the agrosocio-ecosystems acting on each of them, thus laying the systemic and geographical foundations for a model of the spatio- temporal dynamics of “village terroirs”. This initial work has opened up new perspectives in modeling and sustainable development.
基金the support of“Investissements d’Avenir”of the French National Agency for Research(CEBA,ref.ANR-10-LABX-25-01).
文摘The lancehead (Bothrops lanceolatus) is a poisonous snake endemic to Martinique, an island in the Lesser Antilles arc. Today, this snake is on the verge of extinction. The recorded number of snakes killed yearly between 1970 and 2002 decreased by 97%. Despite the production of an antivenom in 1993, the local authorities set up a financial reward to encourage the eradication of lancehead snakes. Today the local population still perceives the snake as a threat, due to its fatal venom and its fierce behaviour. The case study of the lancehead in Martinique highlights the need to develop integrated strategies to conserve species of poisonous snakes on densely populated islands. This requires innovative, cross-sectoral strategies that involve decision-makers working along with multi-disciplinary scientists. Approaching the complexity of ecosystems through the socio-ecological prism implies, conversely, linking up the domains of science and technology, life and environmental sciences, and human and social sciences, through interactions based on sharing common
基金the Bill and Melinda Gates Foundation(Grant Number:INV-005834).
文摘Background: Recently, despite the steady decline in the tuberculosis (TB) epidemic globally, school TB outbreaks have been frequently reported in China. This study aimed to quantify the transmissibility ofMycobacterium tuberculosis (MTB) among students and non-students using a mathematical model to determine characteristics of TB transmission.Methods: We constructed a dataset of reported TB cases from four regions (Jilin Province, Xiamen City, Chuxiong Prefecture, and Wuhan City) in China from 2005 to 2019. We classified the population and the reported cases under student and non-student groups, and developed two mathematical models [nonseasonal model (Model A) and seasonal model (Model B)] based on the natural history and transmission features of TB. The effective reproduction number (R(eff)) of TB between groups were calculated using the collected data.Results: During the study period, data on 456,423 TB cases were collected from four regions: students accounted for 6.1% of cases. The goodness-of-fit analysis showed that Model A had a better fitting effect (P < 0.001). The average R_(eff) of TB estimated from Model A was 1.68 [interquartile range (IQR): 1.20–1.96] in Chuxiong Prefecture, 1.67 (IQR: 1.40–1.93) in Xiamen City, 1.75 (IQR: 1.37–2.02) in Jilin Province, and 1.79 (IQR: 1.56–2.02) in Wuhan City. The average R_(eff) of TB in the non-student population was 23.30 times (1.65/0.07) higher than that in the student population.Conclusions: The transmissibility of MTB remains high in the non-student population of the areas studied, which is still dominant in the spread of TB. TB transmissibility from the non-student-to-student-population had a strong influence on students. Specific interventions, such as TB screening, should be applied rigorously to control and to prevent TB transmission among students.
基金This study was supported by Selfsupporting Program of Guangzhou Laboratory(grant number:No.SRPG22-007).
文摘What is already known about this topic?Given the challenges presented by drug-resistant strains of tuberculosis(TB)and the rising mobility of the population,achieving the objective of eradicating TB appears uncertain.What is added by this report?The examination of TB incidence trends in 10 highburden countries(HBCs)indicated a steady rise in cases,with India and China jointly accounting for nearly 70%of the burden.Projections for the future show diverse trajectories in these countries,with potential difficulties in reaching the TB elimination target,especially in Nigeria,Congo,and South Africa.What are the implications for public health practice?The number of TB cases is on the rise.It is crucial to learn from successful strategies to improve TB prevention and control worldwide through collaborative efforts.
基金The National Natural Science Foundation of China(Grant No.81703281)NHC Key Laboratory of Echinococcosis Prevention and Control,China(No.2021WZK1006).
文摘Summary What is already known about this topic?In China,patients with echinococcosis receive complimentary healthcare services,such as medical treatment,diagnostic examinations,and follow-up care.Despite this,no studies have been conducted to assess the quality of patient management to date.What is added by this report?This study reviewed the medical records of 899 patients who underwent albendazole treatment across 10 endemic counties.Out of 634 evaluable patient files,the proportion of patients with a ratio of actual followup and reexamination times to theoretical follow-up and reexamination times≥0.8 were both low(21.92%and 23.19%,respectively).What are the implications for public health practices?This study identified weaknesses and specific issues in patient management and proposed feasible recommendations to enhance patient file documentation,follow-up,and reexamination.
基金NHC Key Laboratory of Echinococcosis Prevention and Control,China(Grant No.2024WZK1001)Gansu Provincial Health Industry Research Plan Project(Grant No.GSWSKY2017-19)the Natural Science Foundation of Gansu Province,China(Grant No.21JR11RA182).
文摘Background Echinococcosis is an infectious parasitic disease that is extremely harmful to human health.Albendazole is provided free of charge to patients requiring medication under the central government finance transfer payment scheme for echinococcosis control and prevention in China.Our aim is to monitor the state of patient medication and its therapeutic impact,which will help improve medication compliance and the therapeutic effect.Methods Random cluster sampling was used to select 10 echinococcosis-endemic counties in China,and all alben-dazole-treated patients in these counties were investigated.The chi-square and Kruskal-Wallis tests were used to com-pare two or more rates or constituent ratios,and multiple logistic regression analysis was used to identify the influ-encing factors.The records of patients were reviewed to obtain the initial diagnosis results as well as the most recent follow-up results and time,and efficacy was assessed.Results We examined 899 patient files treated with albendazole in 10 endemic counties.Of the 582 evaluable files,7.9%did not take albendazole,and 69.2%did not take albendazole regularly.Only 22.9%took albendazole regularly.Of the 536 patients who took albendazole,242 exhibited adverse reactions.Patients who were Tibetan,herdsmen,received no formal education,used emulsion,and exhibited adverse reactions demonstrated poor compliance.A total of 174 patients with cystic echinococcosis received their most recent imaging follow-up results within one year of the investigation date.Among them,9 patients met the criteria for cure,accounting for 5.2%;56 patients showed effectiveness,accounting for 32.2%;105 patients were deemed ineffective,accounting for 59.8%;5 patients experienced recurrence,accounting for 2.9%.Conclusions Albendazole medication compliance in patients with echinococcosis is not ideal.We must prioritize health education and promotion for Tibetans,herdsmen,and those without formal education.Patients who adhered to their medication regimen achieved higher rates of cure and effectiveness.To improve medication compliance and effi-cacy,it is particularly important to improve communication and medication guidance for patients receiving emulsions and those with adverse reactions after taking albendazole.Simultaneously strengthen patients'attention to follow-up and re-examination.
