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Effects of Broussonetia papyrifera invasion and land use on vegetation characteristics in a tropical forest of Ghana

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Journal of Forestry Research 2019年第4期30卷 1363-1373页

作者： David M.Adigbli Alexander K.Anning James K.Adomako benedicta y.fosu-mensah Institute for Environment and Sanitation Studies University of GhanaLegonAccraGhana Department of Theoretical and Applied Biology Kwame Nkrumah University of Science and TechnologyKumasiGhana Department of Botany University of GhanaLegonAccraGhana

The purpose of this study was to evaluate the effects of Broussonetia papyrifera(paper mulberry)invasion and land use on the floristic composition of a dry semideciduous forest in ***-five plots(25 m×25 m each),distributed among three land uses-selectively logged(SL);abandoned farmlands(AF);and an undisturbed reference(RF)-were *** showed lower tree species richness(S),diversity(H’),evenness(S)and basal area(BA)in the SL(46,0.78,0.32 and 269.12 m2 ha-1,respectively)and AF(40,0.53,0.45,and 131.16 m^2 ha^-1)sites compared to the RF site(79,2.66,0.87,963.72 m^2 ha^-1).Similar patterns were found at the shrub layer,but no differences were observed at the herb ***-metric multidimensional scaling ordination revealed distinct species composition among the land *** two disturbed habitats,SL and AF,were associated with increased *** invasion particularly in the overstory,with importance value index and mean relative density of 45 and 65.03%,and 42 and 53.29%,***,the species was only sparsely represented in the RF *** density of *** correlated negatively with H’,S,E,BA,and native tree density and *** findings highlight the strong link between human land use(i.e.,logging and slash-andburn farming),invasion,and vegetation characteristics,and suggest the need to limit these disturbances to conserve biodiversity within tropical forest ecosystems.

关键词： Afram Headwaters Forest Reserve Broussonetia papyrifera Forest community characteristics Human-caused disturbances Plant invasion

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Cortical hem signaling center: functions, development, and potential implications for evolution and brain disorders

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Neural Regeneration Research 2025年第4期20卷 1079-1080页

作者： Victor V.Chizhikov Igor y.Iskusnykh Department of Anatomy and Neurobiology University of Tennessee Health Science CenterMemphisTNUSA

Development of the telencephalon relies upon several signaling centers-localized cellular populations that supply secreted factors to pattern the cortical *** such signaling center is the cortical hem,which arises during embryonic development at the telencephalic dorsal midline,adjacent to the choroid plexus and hippocampal primordium(Figure 1A).While the cortical hem has also been described in reptiles and birds,most of our knowledge about the developmental roles of the cortical hem is derived from the analysis in *** cortical hem produces several types of secreted molecules,including wingless-related integration site(Wnt)and bone morphogenetic(Bmp)*** cortical hem is particularly important for the development of the hippocampus,which is involved in learning and memory,and the neocortex,which is the most complex brain region that mediates multiple types of behavior and higher cognitive functions(Mangale et al.,2008;Dal-Valle-Anton and Borrell,2022).

关键词： epithelium Figure center

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Exercise preconditioning alleviates ischemia-induced memory deficits by increasing circulating adiponectin

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Neural Regeneration Research 2025年第5期20卷 1445-1454页

作者： Meifeng Zheng Borui Zhang Sonata S y yau Kwok-Fai So Li Zhang Haining Ou Department of Rehabilitation Medicine Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The Fifth Clinical College of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of CNS Regeneration(Ministry of Education) Guangdong-Hong Kong-Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive Science Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Center for Exercise and Brain Science School of PsychologyShanghai University of SportShanghaiChina Neuroscience and Neurorehabilitation Institute University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

Cerebral ischemia is a major health risk that requires preventive approaches in addition to drug *** exercise enhances neurogenesis and synaptogenesis,and has been widely used for functional rehabilitation after *** this study,we determined whether exercise training before disease onset can alleviate the severity of cerebral *** also examined the role of exercise-induced circulating factors in these *** mice were subjected to 14 days of treadmill exercise training before surgery for middle cerebral artery *** found that this exercise pre-conditioning strategy effectively attenuated brain infarct area,inhibited gliogenesis,protected synaptic proteins,and improved novel object and spatial memory *** analysis showed that circulating adiponectin plays a critical role in these preventive effects of *** activation of adiponectin receptors by Adipo Ron mimicked the effects of exercise,while inhibiting receptor activation abolished the exercise *** summary,our results suggest a crucial role of circulating adiponectin in the effects of exercise pre-conditioning in protecting against cerebral ischemia and supporting the health benefits of exercise.

关键词： adiponectin cerebral ischemia exercise pre-conditioning hippocampus memory function middle cerebral artery occlusion prefrontal cortex synaptic proteins treadmill exercise

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Gene therapy for spinal muscular atrophy:perspectives on the possibility of optimizing SMN1 delivery to correct all neurological and systemic perturbations

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Neural Regeneration Research 2025年第7期20卷 2011-2012页

作者： Sharon J.Brown Rafael J.yáñez-Muñoz Heidi R.Fuller School of Pharmacy and Bioengineering Keele UniversityKeeleUK Wolfson Center for Inherited Neuromuscular Disease TORCH BuildingRJAH Orthopaedic HospitalOswestryUK *** Center of Gene and Cell TherapyDepartment of Biological SciencesSchool of Life Sciences and the EnvironmentRoyal Holloway University of LondonEghamUK

Spinal muscular atrophy(SMA)is a genetic condition that results in selective lower motor neuron loss with concomitant muscle weakness and *** genetic cause of SMA was understood in 1995 when loss or impairment of the survival motor neuron 1(SMN1)gene was identified as the main contributing factor(Lefebvre et al.,1995).This,in combination with the discovery that humans have a“back-up”gene,SMN2,which can produce low levels(approximately 10%)of the full-length functional SMN protein,has led to the generation of SMA-specific gene *** was traditionally classified according to age of symptom onset and developmental milestones achieved,with life expectancy and severity varying between ***,SMN2 copy number is used as a proxy for the prediction of disease severity,with higher SMN2 copy number typically being associated with reduced severity of SMA,although this relationship is not absolute:some individuals with low SMN2 copy number have less severe SMA phenotypes and vice ***,the etiology of SMA is further complicated by other factors,such as non-typical nucleotide variants and SMN2-independent modifiers of disease severity.

关键词： atrophy traditionally absolute

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Telecommunication Network Equipment Procurement Projects——A Case Study of MTN Ghana

Telecommunication Network Equipment Procurement Projects——...

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作者： ANANE LOUIS fosu 山东大学

学位级别：硕士

Procurement of network equipment constitutes a major part of mobile telecommunications *** equipment is very expensive and purchasing them requires the establishment of a sound and reliable process in the execution of procurement *** equipment is procured to catch up with all technological innovations,relevant competitions,and customer *** for a durable system constitutes a real challenge in *** several instances,what remains at the core towards procuring telecommunication network equipment is relative to the success and still is limited in *** study aims at examining the critical success factors in the telecommunication network related to MTN Ghana as a *** exploratory innovation adopts both desktop review and field primary data collection using a blend of simple experimental techniques to extract relevant data from staff of MTN Ghana and other telecommunication industry *** has been analyzed using descriptive statistics supported with relative analysis of desktop reviewed information and other sources from MTN *** study found that,there was at least a minimum of eleven key recognizable factors that played significant roles in the success factors towards Telecommunication Network Equipment Procurement projects at MTN *** success factors ranked in terms of contribution from the highest to lowest range from supplier,process,time and price,ensuring a technological ***,there is the Relationship with supplier,Top Management support effective system training and documentation,supportive system integration,security,change management,performance measurement and compliance to risk *** study has demonstrated that ensuring the unchallenged success of Telecommunication Network Equipment Procurement projects at MTN does not come without a systems thinking *** the factors are multifaceted or *** evidence established calls for a relo

关键词： Procurement Project Management Critical Success Factor

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A Mini-Review of Machine Learning in Big Data Analytics:Applications,Challenges,and Prospects

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Big Data Mining and Analytics 2022年第2期5卷 81-97页

作者： Isaac Kofi Nti Juanita Ahia Quarcoo Justice Aning Godfred Kusi fosu the Department of Computer Science and Informatics University of Energy and Natural ResourcesSunyani BS2103Ghana the Department of Electrical&Electronic Engineering Sunyani Technical UniversitySunyani BS2103Ghana the Department of Computer Science Sunyani Technical UniversitySunyani BS2103Ghana

The availability of digital technology in the hands of every citizenry worldwide makes an available unprecedented massive amount of *** capability to process these gigantic amounts of data in real-time with Big Data Analytics(BDA)tools and Machine Learning(ML)algorithms carries many ***,the high number of free BDA tools,platforms,and data mining tools makes it challenging to select the appropriate one for the right *** paper presents a comprehensive mini-literature review of ML in BDA,using a keyword search;a total of 1512 published articles was *** articles were screened to 140 based on the study proposed novel *** study outcome shows that deep neural networks(15%),support vector machines(15%),artificial neural networks(14%),decision trees(12%),and ensemble learning techniques(11%)are widely applied in *** related applications fields,challenges,and most importantly the openings for future research,are detailed.

关键词： Big Data Analytics(BDA) Machine Learning(ML) Big Data(BD) Hadoop MapReduce

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Assessment of anti mosquito measures in households and resistance status of Culex species in urban areas in southern Ghana:Implications for the sustainability of ITN use

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Asian Pacific Journal of Tropical Medicine 2013年第11期6卷 859-864页

作者： Andreas A Kudom Ben A mensah Jacob Nunoo Department of Entomology and Wildlife School of Biological Sciences.University of Cape CoastCape CoastGhana Department of Economics University of Cape CoastCape CoastGhana

Objective:To determine resistance status of Culex species to different class of insecticides and assess the major anti-mosquito strategies employed by urban households and their possible effects on malaria ***:Structured questionnaires were randomly administered to obtain information on demographic characteristics,measures that people use to prevent mosquito bites and their perception of where mosquitoes breed in their *** susceptibility assays were also carried out using WHO discriminating dosages of four insecticides from different chemical classes against Culex ***:Majority of respondents(54.75%) preferred the use of domestic insecticides in the form of aerosols and *** households that used domestic insecticides,the use of coil was most frequent(62.9%) with a mean(95%CI) of 9.18(8.99,9.37) coils per *** level of pyrethroid-resistance and multiple insecticide resistance in Culex species were also detected in some of the study ***:The excessive use of domestic insecticides and high level of resistance in Culex species observed in the study area has implications for the ITN component of the nation's malaria control program in more subtle *** will lose interest in the use of ITN when it fails to protect users from bites of resistant Culex *** use of domestic insecticides may also select resistance in both malaria vectors and Culex *** this account we recommend that nuisance mosquitoes must be controlled as part of malaria control programs to improve acceptance and utilization of ITN.

关键词： Culex species Insecticide resistance Nuisance mosquitoes ITN Malaria control Mosquito coil

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Classification-oriented dawid skene model for transferring intelligence from crowds to machines

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Frontiers of Computer Science 2023年第5期17卷 53-66页

作者： Jiaran LI Richong ZHANG Samuel mensah Wenyi QIN Chunming HU Department of Computer Science and Engineering Beihang UniversityBeijing 100191China Department of Computer Science University of SheffieldSheffieldS102TNUK

When a crowdsourcing approach is used to assist the classification of a set of items,the main objective is to classify this set of items by aggregating the worker-provided labels.A secondary objective is to assess the workers’skill levels in this process.A classical model that achieves both objectives is the famous Dawid-Skene *** this paper,we consider a third objective in this context,namely,to learn a classifier that is capable of labelling future items without further assistance of crowd *** extending the DawidSkene model to include the item features into consideration,we develop a Classification-Oriented Dawid Skene(CODS)model,which achieves the three objectives *** effectiveness of CODS on this three dimensions of the problem space is demonstrated experimentally.

关键词： crowdsourcing information aggregation lear-ning from crowds

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Degree of financialization and energy efficiency in Sub-Saharan Africa: do institutions matter?

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Financial Innovation 2020年第1期6卷 552-573页

作者： Philip Kofi Adom Franklin Amuakwa-mensah Salome Amuakwa-mensah Department of Development Policy School of Public Service and GovernanceGhana Institute of Management and Public Administration(GIMPA)AccraGhana Environment for Development University of GothenburgGothenburgSweden Department of Business Administration Technology and Social SciencesLulea University of TechnologyLuleaSweden Department of Economics Swedish University of Agricultural SciencesUppsalaSweden

The United Nations Sustainable Development Goal 7 emphasizes the need for economies around the world to double their efforts in energy efficiency *** is because improvements in energy efficiency can trigger economic growth and considered as one of the‘green’growth strategies due to its carbon free *** this end,some empirical studies have investigated the nexus between economic growth and energy efficiency,but the effects of the latter on financial indicators have not been sufficiently studied in the literature,at least in developing economies like *** study examines the effect of energy efficiency improvements on commercial bank profitability under different political regimes(i.e.,autocratic and democratic political regimes);something previous literature had *** study uses panel data,consisting of 43 African countries and the simultaneous System Generalized Method of *** found that energy efficiency improvement is more likely to induce higher bank profitability in political institutions with the characteristics of centralization of power compared with those with decentralization of ***,for the banking sector,the findings suggest that energy utilization behavior of clients should be included in the loan or credit valuation *** the government,the agenda of energy efficiency should be aggressively pursued while taking cognizance of creating a political environment that weans itself from a‘grandfathering’behavior.

关键词： Bank performance Energy efficiency Institution Sub-Saharan Africa

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Vegetation structure,dominance patterns and height growth in an Afromontane forest,Southern Africa

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Journal of Forestry Research 2020年第2期31卷 453-462页

作者： Sylvanus mensah Anthony Egeru Achille Ephrem Assogbadjo Romain GleleKakai Laboratoire de Biomathematiques et d’Estimations Forestieres Facultedes Sciences AgronomiquesUniversite d’Abomey-Calavi04 BP 1525 CotonouBenin Regional Universities Forum for Capacity Building in Agriculture Makerere UniversityP.O Box 16811WandegeyaKampalaUganda Laboratoire d’Ecologie Appliquee Facultedes Sciences AgronomiquesUniversite d’Abomey-Calavi03 BP 1974 CotonouBenin

Information on forest structure is fundamentally important to track successional vegetation dynamics for efficient forest *** study reports on vegetation characteristics,dominance patterns and species height growth in a northern mistbelt forest type in South *** alpha-diversity indices(species richness and Shannon-Weiner diversity),structural vegetation parameters(tree density and basal area),and species importance value index were *** class distribution and height-diameter allometry were further examined for the overall stand and most important *** densities(472.0±43.5 and 605.3±28.1 trees ha^-1 for C 5 cm to\10 cm and C 10 cm dbh(diameter at breast height)classes,respectively)and basal area values(1.99±0.19 and 48.07±3.46 m^2 ha^-1,respectively)are comparable to other Afromontane forests in East *** overall stand showed an inverted-J shaped distribution pattern which is a typical feature of stand size class distribution in most natural *** ecologically important species also exhibited an inverted-J shaped distribution pattern,suggesting good regeneration and recruitment *** were significant differences in species on height,reflecting species-specific height growth patterns,possibly a result of intrinsic growth potential and competitive *** present study suggests that conservation and management policies,including protection of surrounding land uses against fire,contribute to maintaining a successful recovery of these ***,it should be noted that these forests may be experiencing relatively slow dynamic flux as a result of the overmature state of some trees with several years under relatively strict protection.

关键词： Diversity Population structure Species composition Size class distribution

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