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Soil Quality, Carbon Sequestration and Yield of Maize (<i>Zea mays</i>L.) under Maize/Legume Cropping System in Alfisols of a Savanna Zone, Nigeria

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American Journal of Climate Change 2017年第4期6卷 622-642页

作者： Azubuike Chidowe Odunze yusuf Destiny musa Aishatu Abdulkadir Department of Soil Science/IAR Faculty of Agriculture Ahmadu Bello University Zaria Nigeria

The role of maize-legume cropping system on soil quality, carbon sequestration and yield of maize in a Northern Guinea Savanna Alfisol, Nigeria was assessed in 2014 and 2015 rain-fed cropping seasons. The experiment was a Randomized Complete Block Design (RCBD), replicated three times and treatments were Sole (Mono crop) Maize (M), Desmodium (D) and Soybeans (S);Maize/soybeans intercrop (MS), Maize/Desmodium intercrop (MD), Maize Strip cropped with Soybean (MS 2:4) and Maize Strip cropped with Desmodium (M:D 2:4). Data obtained were evaluated for Organic carbon, available phosphorus, total nitrogen, soil pH, and CEC, Bulk density, Soil moisture, mean weight diameter and grain yield of Maize. Results show that mean soil acidity (pH water, 6.37;pH CaCl2, 5.78), mean organic carbon (5.23 to 5.69 g·kg-1) and mean total nitrogen improved (0.66 g·kg-1) in 2015 over values in 2014. Mean weight diameter (MWD) increased from 0.59 in 2014 to 1.05 in 2015;indicating a better aggregation across treatments. Treatment M resulted in significantly higher bulk density (Bd) than other treatments at 8 weeks after planting (WAP) and 16WAP, suggesting that soils under mono-crop maize were impaired for sustainable crop production. Soil organic carbon (SOC) sequestered in macro aggregates under MS (1.38 g·kg-1) was significantly higher than the other treatments. Best maize grain yield (GY) was under sole maize (M) and maize strip cropped with Desmodium (MD2:4) (3.13 t·ha-1 and 2.90 t·ha-1 in 2015, respectively). Maize strip cropped with Desmodium and maize/soybean intercrop enhanced better soil chemical and physical properties than sole maize. Soil quality (SQ) under MD2:4 ranked best (SQ1) for sustainable maize grain production and environmental conservation. Therefore, land use strategies that focus protection of soil organic carbon against further depletion and erosion, contribute nitrogen and/or replenishment of depleted carbon stocks through management techniques that involve legume/

关键词： Soil Quality Carbon Sequestration Alfisols Cropping Systems Sustainable Agriculture

Liver cell cancer surveillance practice in Nigeria:Pitfalls and future prospects

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World Journal of Hepatology 2024年第10期16卷 1132-1141页

作者： yusuf musa Ijeoma M Ifeorah Abubakar Sadiq Maiyaki Rahama Mohammad Almustapha Yussuf Abdulkadir Maisuna Habib Tijjani Saleh Abdulmumini Yakubu Division of Gastroenterology and Hepatology Department of Internal MedicineFederal Teaching Hospital KatsinaKatsina 820101Nigeria Department of Medical Laboratory Sciences College of Medicine University of Nigeria Enugu CampusEnugu 400102Nigeria Division of Gastroenterology and Hepatology Department of Internal MedicineFaculty of Clinical SciencesCollege of Health SciencesUsmanu Danfodiyo UniversitySokoto 840283Nigeria Division of Gastroenterology and Hepatology Department of Internal MedicineUsmanu Danfodiyo University Teaching Hospital SokotoSokoto 840101Nigeria Infection Prevention and Control Unit Department of Community MedicineFederal Teaching HospitalKatsina 820101KatsinaNigeria Division of Gastroenterology and Hepatology Department of Internal MedicineBayero University KanoKano 700101Nigeria Division of Gastroenterology and Hepatology Department of Internal MedicineAminu Kano Teaching HospitalKano 700101Nigeria Division of Gastroenterology and Hepatology Department of Internal MedicineUsmanu Danfodiyo UniversitySokoto 840283Nigeria Division of Gastroenterology and Hepatology Department of Internal MedicineUsmanu Danfodiyo University Teaching HospitalSokoto 840283Nigeria

Hepatocellular carcinoma(HCC)is a disease of public health concern in Nigeria,with chronic hepatitis B and C infections contributing most to the disease *** the increasing incidence of HCC,surveillance practices for early diagnosis and possible cure are not deeply rooted in the *** article aims to review the current status of HCC surveillance in Nigeria,stressing the encounters,breaches,and potential *** factors,such as limited tools for screening and diagnostics,insufficient infrastructure,and low cognizance among the doctors,and the general public affect the surveillance practices for HCC in ***,the lack of standardized guidelines and protocols for HCC surveillance further intensifies the suboptimal diagnosis and ***,there are opportunities for refining surveillance practices in the *** would be achieved through boosted public health sensitization campaigns,integrating HCC screening into routine clinical services,and leveraging technological developments for early detection and ***,collaboration between government agencies,healthcare providers,and international organizations can facilitate the development of comprehensive HCC surveillance programs person-alized to the Nigerian ***,HCC surveillance practice faces substantial *** addressing the drawbacks and leveraging prospects,Nigeria can improve HCC surveillance,with subsequent improved outcomes for individuals at risk of developing the disease.

关键词： Hepatocellular cancer Surveillance Alpha-fetoprotein Ultrasonography Des-gamma-carboxy prothrombin Early disease Intermediate disease Late disease Advance disease

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中天山北坡焚风时空分布特征及预报效果分析

山地学报 2022年第6期40卷 823-834页

作者：毛姈·阿依提看李霞玉素甫·木沙李淑婷钟玉婷中国气象局乌鲁木齐沙漠气象研究所中国气象局气象干部培训学院新疆分院

焚风是一种特殊的山地气候现象，是由地形造成的高温、低湿的强下坡风，在天山北坡乌鲁木齐及其周边地区频繁发生。焚风影响飞机起降、陆路运输，对建筑设施以及当地人民生命财产安全有着潜在威胁，并且在重污染天气的形成过程中起重要... 详细信息

焚风是一种特殊的山地气候现象，是由地形造成的高温、低湿的强下坡风，在天山北坡乌鲁木齐及其周边地区频繁发生。焚风影响飞机起降、陆路运输，对建筑设施以及当地人民生命财产安全有着潜在威胁，并且在重污染天气的形成过程中起重要作用。目前对中天山北坡的焚风研究，多局限于乌鲁木齐焚风天气个例的分析，对焚风的时空分布特征的认识不够细致深入，对焚风的形成机理依然缺乏全面系统的认识。本研究采用2018—2020年中天山北坡9个气象站逐时风速风向资料、欧洲细网格数值预报产品，分析乌鲁木齐及其周边焚风的时空分布特征，并检验了欧洲细网格数值预报产品对焚风最大风速的预报效果。结果表明：(1)近3年乌鲁木齐南郊乌拉泊出现大于等于17.00m·s-1的焚风1213时次，其次是西郊八钢(480时次)、峡谷内部柴窝堡(329时次)和乌鲁木齐市区(101时次)。焚风着陆点春季偏向南郊乌拉泊以北地区，冬季则偏向其以南地区；(2)上述4站平均瞬时风速由大到小依次为乌拉泊21.24m·s-1、八钢20.21m·s-1、乌鲁木齐19.61 m·s-1、柴窝堡18.36 m·s-1。秋季八钢平均风速大于乌拉泊。4个站点出现东东南(ESE)风向频率最高；(3)近3年焚风天气过程共发生27次，其中春季发生14次(51.85%)、冬季7次(25.93%)、秋季6次(22.22%);(4)与南郊乌拉泊相比，乌鲁木齐市区焚风过程持续时间相对较短；(5)欧洲细网格10 m风场预报产品对八钢、乌鲁木齐、乌拉泊焚风最大风速的预报相关性较高，相关系数均达0.80以上，但预报偏差较大；欧洲细网格850 hPa风场预报产品对八钢、乌鲁木齐、乌拉泊焚风最大风速预报偏差较小。本研究可为中天山北坡焚风天气监测预警提供科技支撑。

关键词：中天山北坡焚风时空分布欧洲细网格数值预报产品预报检验

近10 a中亚低涡背景下新疆短时强降水环境场分析

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干旱区地理 2018年第2期41卷 273-281页

作者：毛列尼.阿依提看杨莲梅张云惠玉素甫.木沙中国气象局乌鲁木齐沙漠气象研究所新疆乌鲁木齐830002 新疆维吾尔自治区气象局气象台新疆乌鲁木齐830002 中国气象局气象干部培训学院新疆分院新疆乌鲁木齐830002

为更好地把握中亚低涡造成新疆短时强降水天气过程的机理特征,为新疆短时强降水预报预警提供参考和依据,利用FNL资料、探空资料等,运用天气学原理、动力诊断分析方法等,研究了中亚低涡系统不同部位发生的三类短时强降水的环境场特征及... 详细信息

为更好地把握中亚低涡造成新疆短时强降水天气过程的机理特征,为新疆短时强降水预报预警提供参考和依据,利用FNL资料、探空资料等,运用天气学原理、动力诊断分析方法等,研究了中亚低涡系统不同部位发生的三类短时强降水的环境场特征及环流配置。结论表明:(1)短时强降水发生在500 h Pa中亚低涡前部西南气流下为最多。(2)A指数在新疆地区短时强降水降水预报中意义不大。(3)中亚低涡背景下新疆短时强降水天气的配置一般属于高空冷平流强迫类。(4)三类短时强降水形势配置的共性:在低涡背景下,对流层中高层都有显著气流存在,低空有切变线存在,近地面往往有辐合线,700 hPa左右往往有湿舌。异性:第I类短时强降水湿度条件较好,第Ⅱ类短时强降水高低空温差较大,第Ⅲ类短时强降水垂直风切变较强。

关键词：中亚低涡短时强降水环境参数形势配置

近10a新疆短时强降水湿度层结及大气能量结构特征分析

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沙漠与绿洲气象 2017年第2期11卷 43-49页

作者：毛列尼.阿依提看玉素甫.木沙郭品文南京信息工程大学大气科学学院江苏南京210044 中国气象局气象干部培训学院新疆分院新疆乌鲁木齐830013

为更好地把握中亚低涡造成新疆短时强降水天气过程的机理特征,利用温度露点温度廓线图(T-lnP图)和大气位温-风矢能量图(V-3θ图)研究了中亚低涡背景下新疆短时强降水的湿度特征和大气能量结构特征。主要结论有:(1)根据对短时强降水T-ln... 详细信息

为更好地把握中亚低涡造成新疆短时强降水天气过程的机理特征,利用温度露点温度廓线图(T-lnP图)和大气位温-风矢能量图(V-3θ图)研究了中亚低涡背景下新疆短时强降水的湿度特征和大气能量结构特征。主要结论有:(1)根据对短时强降水T-lnP图及湿度特征的分析统计,将短时强降水分成三类:对流层高低层干而中层湿度大型、对流层中层干燥型、对流层整层湿度都显著型。其中第一类最多,占短时强降水总个例的60%;而第二类和第三类分别占27.5%、12.5%。(2)一般在短时强降水天气发生前V-3θ图特征为:三条θ曲线呈曲折增长;有"顺滚流"结构存在;有"蜂腰"形构造;有较为浅薄的超低温层存在。

关键词：中亚低涡短时强降水湿度层结特征大气能量结构特征

Budd-Chiari syndrome:Etiology,pathogenesis and diagnosis

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World Journal of Gastroenterology 2007年第19期13卷 2693-2696页

作者： musa Aydinli yusuf Bayraktar Gastroenterology Department Hacettepe University School of Medicine Ankara Turkey

Budd-Chiari syndrome is a congestive hepatopathy caused by blockage of hepatic veins. This syndrome occurs in 1/100 000 in the general population. Hypercoagulable state could be identified in 75% of the patients; more than one etiologic factor may play a role in 25% of the patients. Primary myeloproliferative diseases are the leading cause of the disease. Two of the hepatic veins must be blocked for clinically evident disease. Liver congestion and hypoxic damage of hepatocytes eventually result in predominantly centrilobular fibrosis. Doppler ultrasonography of the liver should be the initial diagnostic procedure. Hepatic venography is the reference procedure if required. Additionally liver biopsy may be helpful for differential diagnosis. The prognosis of the chronic form is acceptable compared to other chronic liver diseases.

关键词： Budd-Chiari syndrome Etiology Pathogenesis Diagnosis

Comparative seismic design optimization of spatial steel dome structures through three recent metaheuristic algorithms

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Frontiers of Structural and Civil Engineering 2022年第1期16卷 57-74页

作者： Serdar CARBAS musa ARTAR Department of Civil Engineering Karamanoglu Mehmetbey UniversityKaraman 70200Turkey Department of Civil Engineering Bayburt UniversityBayburt 69000Turkey

Steel dome structures,with their striking structural forms,take a place among the impressive and aesthetic load bearing systems featuring large internal spaces without internal *** this paper,the seismic design optimization of spatial steel dome structures is achieved through three recent metaheuristic algorithms that are water strider(WS),grey wolf(GW),and brain storm optimization(BSO).The structural elements of the domes are treated as design variables collected in member *** structural stress and stability limitations are enforced by ASD-AISC ***,the displacement restrictions are considered in design *** metaheuristic algorithms are encoded in MATLAB interacting with SAP2000 for gathering structural reactions through open application programming interface(OAPI).The optimum spatial steel dome designs achieved by proposed WS,GW,and BSO algorithms are compared with respect to solution accuracy,convergence rates,and reliability,utilizing three real-size design examples for considering both the previously reported optimum design results obtained by classical metaheuristic algorithms and a gradient descent-based hyperband optimization(HBO)algorithm.

关键词： steel dome optimization water strider algorithm grey wolf algorithm brain storm optimization algorithm hyperband optimization algorithm

Mathematical modeling of COVID-19 epidemic with effect of awareness programs

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Infectious Disease Modelling 2021年第1期6卷 448-460页

作者： Salihu Sabiu musa Sania Qureshi Shi Zhao Abdullahi yusuf Umar Tasiu Mustapha Daihai He Department of Applied Mathematics Hong Kong Polytechnic UniversityHong KongChina Department of Mathematics Kano University of Science and TechnologyWudilNigeria Department of Basic Sciences and Related Studies Mehran University of Engr.&Tech.JamshoroPakistan JC School of Public Health and Primary Care Chinese University of Hong KongHong KongChina Shenzhen Research Institute of Chinese University of Hong Kong ShenzhenChina Department of Computer Engineering Biruni UniversityIstanbulTurkey Department of Mathematics Science FacultyFederal University DutseJigawaNigeria Department of Mathematics Near East University TRNCMersin 10Turkey

Severe acute respiratory syndrome coronavirus 2(SARS-COV-2)is a novel virus that emerged in China in late 2019 and caused a pandemic of coronavirus disease 2019(COVID-19).The epidemic has largely been controlled in China since March 2020,but continues to inflict severe public health and socioeconomic burden in other parts of the *** of the major reasons for China’s success for the fight against the epidemic is the effectiveness of its health care system and enlightenment(awareness)programs which play a vital role in the control of the COVID-19 *** is currently witnessing a rapid increase of the epidemic likely due to its unsatisfactory health care system and inadequate awareness *** this paper,we propose a mathematical model to study the transmission dynamics of COVID-19 in *** model incorporates awareness programs and different hospitalization strategies for mild and severe cases,to assess the effect of public awareness on the dynamics of COVID-19 *** fit the model to the cumulative number of confirmed COVID-19 cases in Nigeria from 29 March to 12 June *** find that the epidemic could increase if awareness programs are not properly *** presumed that the effect of awareness programs could be ***,our results suggest that the awareness programs and timely hospitalization of active cases are essential tools for effective control and mitigation of COVID-19 pandemic in Nigeria and ***,we perform sensitive analysis to point out the key parameters that should be considered to effectively control the epidemic.

关键词： COVID-19 Epidemic Mathematical modeling Reproduction number Public awareness

EFFECT OF THE COMPOSITION OF m-CRESOL/H_2O SOLVENT ON HYDRODYNAMIC PROPERTIES OF NYLON 6

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Chinese Journal of Polymer Science 2006年第4期24卷 369-377页

作者： musa Kaleem Baloch Mohsan Nawaz Department of Chemistry

The intrinsic viscosity [η], Huggins constant （Ku）, [η]0, α^3 and flow activation energy values of nylon 6 have been measured in wateηm-cresol （0/100-20/80） systems at different temperatures （20-60℃）. It has been found that the intrinsic viscosity, [η]0 and α^3 increase with the increase in water contents in m-cresol up to 15% and then decrease. They increase with the increase in temperature irrespective of solvent composition. It has been noted that the percent increase of α^3 is the highest at 60℃ and the lowest at 20℃ for a particular solvent system. The intrinsic viscosity data obey Arrhenius equation over the considered conditions. The activation energy and the KH values decrease very sharply with the addition of water, giving a minimum value at 15% of water and then increase slowly. The variation of all the parameters has been explained in terms of variation in thermodynamic quality of solvent with the addition of water to m-cresol and change in temperature, resulting in the change of conformational and orientational properties of polymer molecules. This change of solvent quality also results in variation of selective sorption of solvent over the polymer, such as hydrogen bonding, etc.

关键词： Intrinsic viscosity Huggins constant Thermodynamic quality of solvent Activation energy Hydrogen bonding Conformation Selective sorption.