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Impacts of climate change on the yields of leguminous crops in the Guinea Savanna agroecological zone of Ghana

Regional Sustainability 2023年第2期4卷 139-149页

作者： Enoch YELELIERE philip antwi-agyei Frank BAFFOUR-ATA Department of Environmental Science College of ScienceKwame Nkrumah University of Science and TechnologyKumasiGhana

The impacts of climate change on crop yields are receiving renewed interest,with focus on cereals and staple crops at the regional and national ***,the impacts of climate change on the yields of leguminous crops in the local context has not been ***,an in-depth understanding of climate change in the local context may support the design of locally relevant adaptation responses to current and future climate *** study examined the impacts of climate variables(annual rainfall,annual average temperature,rainfall indices(rainfall onset,rainfall cessation,and the length of rainy days),and the number of dry days)on the yields of leguminous crops(groundnuts,cowpeas,and soybeans)in the Guinea Savanna agroecological zone of Ghana during the period of *** data were analysed using Mann-Kendall’s trend,Sen’s slope test,correlation analysis,and Multiple Regression Analysis(MRA).The findings revealed that annual rainfall,annual average temperature,rainfall onset,rainfall cessation,and the length of rainy days,and the number of dry days all showed varied impacts on the yields of groundnuts,cowpeas,and *** trend analysis detected a marginal decrease in the amount of rainfall,rainfall onset,and the number of dry days from 1989 to 2020(P>0.050).Annual average temperature and the length of rainy days substantially varied(P<0.050)from 1989 to 2020,showing an increasing *** findings also showed a marked upward trend for the yields of groundnuts,cowpeas,and soybeans during *** climate variables analysed above increased the yields of groundnuts,cowpeas,and soybeans by 49.0%,55.0%,and 69.0%,*** yields of groundnuts,cowpeas,and soybeans fluctuated with the variability of 30.0%,28.0%,and 27.0%from 2005 to 2020,*** three leguminous crops under study demonstrated unpredictable yields due to the variations of annual rainfall,annual average temperature,rainfall onset,rainfall cessation,the length of rainy days,and

关键词： Climate change Leguminous crops(groundnuts,cowpeas,and soybeans) Guinea Savanna Annual average temperature Rainfall indices Number of dry days

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Traditional agroecological knowledge and practices:The drivers and opportunities for adaptation actions in the northern region of Ghana

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Regional Sustainability 2022年第4期3卷 294-308页

作者： Enoch YELELIERE Thomas YEBOAH philip antwi-agyei Prince PEPRAH Department of Environmental Science College of ScienceKwame Nkrumah University of Science and TechnologyKumasiGhana The Bureau of Integrated Rural Development(BIRD) Kwame Nkrumah University of Science and TechnologyKumasiGhana Centre for Primary Health care and Equity/Social Policy Research Centre University of New South WalesNew South Wales 2052SydneyAustralia

Agroecological practices are promoted as a more proactive approach than conventional agriculture to achieving a collective global response to climate change and variability while building robust and resilient agricultural systems to meet food needs and protect the integrity of *** is relatively limited evidence on the key traditional agroecological knowledge and practices adopted by smallholder farmers,the factors that influence smallholder farmers’decision to adopt these practices,and the opportunities it presents for building resilient agricultural *** a multi-scale mixed method approach,we conducted key informant interviews(n=12),focus group discussions(n=5),and questionnaire surveys(N=220)to explore the traditional agroecological knowledge and practices,the influencing factors,and the opportunities smallholder farmers presented for achieving resilient agricultural *** findings suggest that smallholder farmers employ a suite of traditional agroecological knowledge and practices to enhance food security,combat climate change,and build resilient agricultural *** most important traditional agroecological knowledge and practices in the study area comprise cultivating leguminous crops,mixed crop-livestock systems,and crop rotation,with Relative Importance Index(RII)values of 0.710,0.708,and 0.695,*** is reported that the choice of these practices by smallholder farmers is influenced by their own farming experience,access to market,access to local resources,information,and expertise,and the perceived risk of climate ***,the results further show that improving household food security and nutrition,improving soil quality,control of pest and disease infestation,and support from NonGovernmental Organizations(NGOs)and local authorities are opportunities for smallholder farmers in adopting traditional agroecological knowledge and practices for achieving resilient agricultural *** findings call into questi

关键词： Climate change Food security Adaptation actions Traditional agroecological knowledge and practices Resilient agricultural systems

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Motivations,enablers and barriers to the adoption of climate-smart agricultural practices by smallholder farmers:Evidence from the transitional and savannah agroecological zones of Ghana

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Regional Sustainability 2021年第4期2卷 375-386页

作者： philip antwi-agyei Emmanuel Mawuli ABALO Andrew John DOUGILL Frank BAFFOUR-ATA Department of Environmental Science Kwame Nkrumah University of Science and TechnologyKumasiGhana Sustainability Research Institute School of Earth and EnvironmentUniversity of LeedsLS29JT LeedsUnited Kingdom

This paper examined the prioritized climate-smart agricultural practices by smallholder farmers,the motivations of adopting climate-smart agricultural practices,the enablers to the successful adoption of climate-smart agricultural practices,and the barriers to the successful adoption of climate-smart agricultural practices in the transitional and savannah agroecological zones of ***,we employed ethnographic research using participatory approaches,including two stakeholder workshops and household surveys with 1061 households in the transitional and savannah agroecological zones of *** weighted average index(WAI)and problem confrontation index(PCI)were used to rank smallholder farmers’perceived enablers to the adoption of climate-smart agricultural practices and the barriers affecting climate-smart agricultural practices,*** suggest that the majority of the respondents used a suite of climate-smart agricultural practices,including the timely harvesting of produce and storage,emergency seed banking,appropriate and timely weed and pest control,and early planting as practices to build climate *** majority of smallholder farmers primarily employed climate-smart agricultural practices to improve household food security(96.2%),reduce pests and diseases(95.6%),and obtain higher yields and greater farm income(93.2%).Findings also show that secured land tenure system arrangement,understanding the effects of climate change,and access to sustainable agricultural technologies were ranked the first,second,and third most important enablers to the adoption of climate-smart agricultural practices with the WAI values of 2.86,2.75,and 2.70,*** barriers to the successful adoption of climate-smart agricultural practices included incidences of pests and diseases(PCI=2530),inadequate access to agricultural credit(PCI=2502),high cost of improved crop varieties(PCI=2334),and limited government support with farm inputs(PCI=2296).Sm

关键词： Climate-smart agriculture Smallholder farmers Food security Climate change Weighted average index Problem confrontation index Ghana

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应用YOLO v4模型的赛道锥桶检测与识别方法

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机械设计与制造 2024年第10期 20-24,33页

作者：李强陶立波杨爱喜 agyei philip 浙江科技学院机械与能源工程学院浙江杭州310023 浙江大学工程师学院浙江杭州310015

为快速检测与准确识别赛道锥桶,提出了一种基于YOLO v4模型的赛道锥桶检测与识别方法。首先依据复杂多变的赛道场景采集了多张锥桶图像作为数据集原始数据,在工控机上进行锥桶数据集制作、训练和模型选取;然后搭建基于YOLO v4模型的锥... 详细信息

为快速检测与准确识别赛道锥桶,提出了一种基于YOLO v4模型的赛道锥桶检测与识别方法。首先依据复杂多变的赛道场景采集了多张锥桶图像作为数据集原始数据,在工控机上进行锥桶数据集制作、训练和模型选取;然后搭建基于YOLO v4模型的锥桶检测与识别系统,选择三种较为常见赛道场景进行实车试验。试验结果表明,所提出的方法在不同光照条件下仍能快速检测并准确识别目标锥桶,特别是在锥桶较为密集且多个锥桶目标重叠的场景下,置信度达到0.91以上,具有较强的鲁棒性,且实时检测的平均帧率达到35f/s,能够满足无人驾驶方程式赛车对感知系统准确性和实时性的需求。

关键词：无人驾驶方程式赛车 YOLO v4 赛道锥桶目标检测锥桶识别

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Light-deformable microrobots shape up for the biological obstacle course

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Light(Science & Applications) 2024年第5期13卷 803-805页

作者： philip Wijesinghe Centre of Biophotonics SUPASchool of Physics and AstronomyUniversity of St AndrewsNorth HaughSt AndrewsFife KY169SSUK

Euglena gracilis microalga has been transformed into a soft bio-microrobot with light-controlled motion and deformation that can address diverse bio-challenges,such as drug delivery,diseased cell removal,and photodyna... 详细信息

关键词： Euglena transformed obstacle

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MicroRNAs as potential biomarkers for diagnosis of attention deficit hyperactivity disorder

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Neural Regeneration Research 2024年第3期19卷 557-562页

作者： Bridget Martinez philip V.Peplow Department of Pharmacology University of Nevada-RenoRenoUSA Department of Medicine University of Nevada-RenoRenoUSA Department of Anatomy University of OtagoDunedinNew Zealand

Inappropriate levels of hyperactivity,impulsivity,and inattention characterize attention deficit hyperactivity disorder,a common childhood-onset neuropsychiatric *** cognitive function and learning ability of children with attention deficit hyperactivity disorder are affected,and these symptoms may persist to adulthood if they are not *** diagnosis of attention deficit hyperactivity disorder is only based on symptoms and objective tests for attention deficit hyperactivity disorder are *** for attention deficit hyperactivity disorder in children include medications,behavior therapy,counseling,and education services which can relieve many of the symptoms of attention deficit hyperactivity disorder but cannot cure *** is a need for a molecular biomarker to distinguish attention deficit hyperactivity disorder from healthy subjects and other neurological conditions,which would allow for an earlier and more accurate diagnosis and appropriate treatment to be *** expression of microRNAs is connected to brain development and disease and could provide novel biomarkers for the diagnosis and prognosis of attention deficit hyperactivity *** recent studies reviewed had performed microRNA profiling in whole blood,white blood cells,blood plasma,and blood serum of children with attention deficit hyperactivity disorder.A large number of microRNAs were dysregulated when compared to healthy controls and with some overlap between individual *** the studies that had included a validation set of patients and controls,potential candidate biomarkers for attention deficit hyperactivity disorder in children could be miR-140-3p,let-7g-5p,-30e-5p,-223-3p,-142-5p,-486-5p,-151a-3p,-151a-5p,and-126-5p in total white blood cells,and miR-4516,-6090,-4763-3p,-4281,-4466,-101-3p,-130a-3p,-138-5p,-195-5p,and-106b-5p in blood *** studies are warranted with children and adults with attention deficit hyperactivity disorder,and

关键词： adults attention deficit hyperactivity disorder biomarkers blood plasma blood serum children microRNA total white blood cells whole blood

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MicroRNAs as potential biomarkers for diagnosis of schizophrenia and influence of antipsychotic treatment

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Neural Regeneration Research 2024年第7期19卷 1523-1531页

作者： Bridget Martinez philip V.Peplow Department of Pharmacology University of Nevada-RenoRenoNVUSA Department of Medicine University of Nevada-RenoRenoNVUSA Department of Anatomy University of OtagoDunedinNew Zealand

Chara cterized by positive symptoms(such as changes in behavior or thoughts,including delusions and hallu cinations),negative symptoms(such as apathy,anhedonia,and social withdrawal),and cognitive impairments,schizophrenia is a chro nic,severe,and disabling mental disorder with late adolescence or early adulthood onset,Antipsychotics are the most commonly used drugs to treat schizophrenia,but those currently in use do not fully reverse all three types of symptoms characte rizing this *** is frequently misdiagnosed,resulting in a delay of or inappropriate *** expression of microRNAs is connected to brain development and disease and could provide novel biomarkers for the diagnosis and prognosis of *** recent studies reviewed included microRNA profiling in blood-and urine-based materials and nervous tissue mate *** the studies that had validated the preliminary findings,potential candidate biomarkers for schizophrenia in adults could be miR-22-3p,-30e-5p,-92a-3p,-148b-5p,-181a-3p,-181a-5p,-181b-5p,-199 b-5p,-137 in whole blood,and miR-130b,-193a-3p in blood *** treatment of schizophrenia patients was found to modulate the expression of certain microRNAs including miR-130b,-193a-3p,-132,-195,-30e,-432 in blood *** studies are warranted with adolescents and young adults having schizophrenia and consideration should be given to using animal models of the disorder to investigate the effect of suppressing or overexpressing specific microRNAs.

关键词： antipsychotics biomarkers blood exosomes blood plasma brain tissue exosomes brain tissues leukocytes microRNAs neural stem cells olfactory neuroepithelium schizophrenia whole blood

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Empirical Wavelet Transform Based Method for Identification and Analysis of Sub-synchronous Oscillation Modes Using PMU Data

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 34-40页

作者： Joice G.philip Jaesung Jung Ahmet Onen the Department of Energy Systems Research Ajou UniversitySuwonSouth Korea the Department of Electrical and Electronic Engineering Abdullah Gul UniversityKayseri38080Turkey the Department of Electrical and Computer Engineering College of EngineeringSultan Qaboos UniversityAl-KhoudMuscatOman

This paper proposes an empirical wavelet transform(EWT)based method for identification and analysis of sub-synchronous oscillation(SSO)modes in the power system using phasor measurement unit(PMU)*** phasors from PMUs are preprocessed to check for the presence of *** the presence is established,the signal is decomposed using EWT and the parameters of the mono-components are estimated through Yoshida *** superiority of the proposed method is tested using test signals with known parameters and simulated using actual SSO signals from the Hami Power Grid in Northwest *** show the effectiveness of the proposed EWT-Yoshida method in detecting the SSO and estimating its parameters.

关键词： Empirical wavelet transform(EWT) sub-synchronous oscillation Prony-based method Yoshida algorithm variational mode decomposition phasor measurement unit(PMU)

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Liver transplantation as an alternative for the treatment of neuroendocrine liver metastasis: Appraisal of the current evidence

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Hepatobiliary & Pancreatic Diseases International 2024年第2期23卷 146-153页

作者： philip C.Muller Matthias Pfister Dilmurodjon Eshmuminov Kuno Lehmann Department of Surgery and Transplantation University Hospital ZurichRämistrasse 100Zurich CH-8091Switzerland

Background:Liver transplantation(LT)for neuroendocrine liver metastases(NELM)is still in *** comparing LT with liver resection(LR)for NELM are scarce,as patient selection is heterogeneous and experience is *** goal of this review was to provide a critical analysis of the evidence on LT versus LR in the treatment of *** sources:A scoping literature search on LT and LR for NELM was performed with PubMed,including English articles up to March ***:International guidelines recommend LR for NELM in resectable,well-differentiated tumors in the absence of extrahepatic metastatic disease with superior results of LR compared to systemic or liver-directed *** liver surgery has extended resectability criteria whilst entailing increased perioperative risk and short disease-free *** highly selected patients(based on the Milan criteria)with unresectable NELM,oncologic results of LT are *** factors include tumor biology(G1/G2)and burden,waiting time for LT,patient age and extrahepatic *** on low-level evi-dence,LT for low-grade NELM within the Milan criteria resulted in improved disease-free survival and overall survival compared to *** benefits of LT were lost in patients beyond the Milan ***:With adherence to strict selection criteria especially tumor biology,LT for NELM is becoming a valuable option providing oncologic benefits compared to *** evidence suggests even stricter selection criteria with regard to tumor biology.

关键词： Liver transplantation Neuroendocrine liver metastases Liver resection Selection criteria Tumor biology

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Dynamic Event-Triggered Consensus Control for Input Constrained Multi-Agent Systems With a Designable Minimum Inter-Event Time

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 649-660页

作者： Meilin Li Yue Long Tieshan Li Hongjing Liang C.L.philip Chen the School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China IEEE the Yangtze Delta Region Institute University of Electronic Science and Technology of ChinaHuzhou 313000 the Laboratory of Electromagnetic Space Cognition and Intelligent Control Beijing 100089China the School of Computer Science and Engineering South China University of TechnologyGuangzhou 510006

This paper investigates the consensus control of multi-agent systems(MASs) with constrained input using the dynamic event-triggered mechanism(ETM).Consider the MASs with small-scale networks where a centralized dynamic ETM with global information of the MASs is first ***,a distributed dynamic ETM which only uses local information is developed for the MASs with large-scale *** is shown that the semi-global consensus of the MASs can be achieved by the designed bounded control protocol where the Zeno phenomenon is eliminated by a designable minimum inter-event *** addition,it is easier to find a trade-off between the convergence rate and the minimum inter-event time by an adjustable ***,the results are extended to regional consensus of the MASs with the bounded control *** simulations show the effectiveness of the proposed approach.

关键词： Constrained input designable minimum inter-event time directed communication topology dynamic event-triggered mechanism MASs consensus control

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