检索结果-南通市图书馆

Effect of Variety and Plant Spacing on Growth and Yield of Groundnuts (Arachis hypogaea L.)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Sciences 2024年第1期15卷 54-70页

作者： Abukari Iddrisu Eric Adjei Samuel Kwesi Asomaning Kwadwo Gyasi Santo Adu Poku Isaac Alexander Danson-anokye Cocoa Health and Extension Division Huni Valley Ghana Department of Agriculture Berekum East Municipal Assembly Berekum Ghana Department of Horticulture and Crop Production School of Agriculture and Technology University of Energy and Natural Resources Sunyani Ghana Glenn High School Winston Salem USA

A field experiment was carried out to determine the effect of variety and plant spacing on yield and growth of groundnuts. The field experiment was laid in a 3 × 3 factorial experiment in a Randomized Complete Block Design (RCBD) with three (3) replications. The factor A included three (3) groundnut varieties (Nkatie Sari, Sum Nutt 22 and Yenyawoso) and Factor B was the three (3) spacing of 30 cm × 15 cm, 30 cm × 30 cm and 30 cm × 40 cm. All recommended agronomic practices were followed. Data was collected from eight (8) tagged plants. Growth data were recorded on plant height, number of branches, number of leaves, and the number of flowers while yield data were collected on the number of flowers, number of pods per plant, 100 seeds weight and the pod yield (kg/ha). The plant spacing significantly influenced (P < 0.05) the growth and yield parameters. Groundnut grown at a spacing of 30 cm × 15 cm produced the maximum plant height, whereas the maximum number of leaves, number of branches and number of flowers were produced from 30 cm × 40 cm. Yenyawoso variety with a wider plant spacing performed better vegetatively among all the varieties. The Yenyawoso variety produced the highest number of pods, 100 seeds weight and pod yield as compared to the other varieties. Also, Yenyawoso at 30 cm × 40 cm spacing and Nkatie Sari at 30 cm × 15 cm spacing produced the maximum pod yield.

关键词： Groundnut Variety Yield Spacing Plant Height

Soil carbon stock and emission: estimates from three land-use systems in Ghana

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ecological Processes 2021年第1期10卷 157-169页

作者： Joseph anokye Vincent Logah Andrews Opoku Department of Crop and Soil Sciences Kwame Nkrumah University of Science and Technology(KNUST)KumasiGhana

Background:Land-use systems that sequester carbon and reduce CO_(2) emissions are key in the global mitigation strategies of climate *** gas emission from agro-ecosystems in sub-Saharan Africa is little ***,we quantified soil carbon stock(SCS)and CO_(2) emissions from three land-use systems *** land,oil palm plantation and forestland in the semi-deciduous forest zone of ***:Soil organic carbon concentration at the 0–15 cm layer in the forestland was 62 and 23%greater than that in the arable land and palm plantation,*** SCS along the 1.0-m profile was 108.2,99.0 and 73.5 Mg ha^(−1) in the forestland,palm plantation and arable land,*** land emitted 30–46%more CO_(2) than palm plantation and *** the dry season,CO_(2) emissions were respectively 0.93,0.63 and 0.5 kg ha^(−1) h−1 from the arable land,palm plantation and *** relationships were observed between CO_(2) emissions and SCS,soil temperature,and *** SCS greatly influenced CO_(2) emission in the dry season more than in the wet season in the relatively higher carbon-input systems(forestland and palm plantation).Soil temperature accounted for more than 55%of CO_(2) emissions in both seasons,which has implications in the era of rising global ***:The study provides relevant information on carbon storage abilities of the three land-use types in tropical climate and calls for drastic climate change actions to reduce degradation of forest cover and soil disturbance in agro-ecosystems in sub-Saharan Africa.

关键词： Arable land Carbon dioxide emission Climate change Soil moisture Soil temperature Sub-Saharan Africa

Comparison of three processing methods for laminated bamboo timber production

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2019年第1期30卷 363-369页

作者： Edi Suhaimi Bakar Muhammad Nadzim Mohd Nazip Rogerson anokye Lee Seng Hua Faculty of Forestry Universiti Putra Malaysia Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia

Three processing techniques, split-squaring(SS),V-grooving(VG), and split-edging(SE), were evaluated and compared in terms of their processing time and recovery. Semantan bamboo(Gigantochloa scortechinii Gamble) was used as a raw material and the results showed that the VG-method required the longest processing time(32.1 min), followed by the SS-method(18.2 min), and the SE-method(17.9 min). However, the VG-method showed the highest recovery(82.0%) compared to the SS-method and SE-method, 31.0 and 49.4%, respectively. When both processing time and recovery factors were combined with the same weighing factor, the highest value was recorded with the VG-method(49.1), while the SE-method had values of 31.1 and the SS-method 12.8. The results suggest that the VG-method is the best option. However, the V-grooving machine is still a prototype and therefore the SE-method could be an alternative option until the improved V-grooving machine is available.

关键词： Bamboo culm Laminated bamboo timber Vgrooving method Split-squaring method Split-edging method

Container Terminal Land-Utilisation Efficiency in Ghana

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Transportation Technologies 2020年第1期10卷 1-15页

作者： George Kobina vanDyck Stephen anokye Domfeh George Konney Regional Maritime University Accra Ghana Maritime Initiative Africa Tema Ghana Ghana Ports and Harbours Authority Tema Ghana

Land-use efficiency is essential in ports, in particular those that are constrained for space and experiencing congestion. In such situations, ports have been noted to invest in off-dock container yards. This study analysed land use efficiency of four off-dock yards located near the Port of Tema, Ghana’s largest seaport responsible for 85 percent of its trade. The study found that the terminals utilised 0.13 to 0.52 hectares of land, largely influenced by the dwell time and stacking height of containers. It was recommended that regulatory agencies need to coordinate better to reduce the time spent on cargo inspection and validation. In addition, terminals may need to incentivise customers to clear their import containers within shorter periods.

关键词： Land Utilisation Container Terminal Off Dock Yard Ghana Efficiency Dwell Time

Machine Learning Based Unmanned Aerial Vehicle Enabled Fog-Radio Access Network and Edge Computing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中兴通讯技术：英文版 2019年第4期17卷 33-45页

作者： Mohammed SEID Stephen anokye SUN Guolin University of Electronic Science and Technology of China ChengduSichuan 611731China Dilla University DillaEthiopia University of Mines and Technology Tarkwa 237Ghana

The emerging unmanned aerial vehicle(UAV)technology and its applications have become part of the massive Internet of Things(mIoT)ecosystem for future cellular *** of things(IoT)devices have limited computation capacity and battery life and the cloud is not suitable for offloading IoT tasks due to the distance,latency and high energy *** edge computing(MEC)and fog radio access network(F-RAN)together with machine learning algorithms are an emerging approach to solving complex network problems as described *** this paper,we suggest a new orientation with UAV enabled F-RAN *** architecture adopts the decentralized deep reinforcement learning(DRL)algorithm for edge IoT devices which makes independent decisions to perform computation offloading,resource allocation,and association in the aerial to ground(A2G)*** tionally,we summarized the works on machine learning approaches for UAV networks and MEC networks,which are related to the suggested architecture and discussed some technical challenges in the smart UAV-IoT,F-RAN 5G and Beyond 5G(6G).

关键词： unmanned aerial vehicle machine learning F-RAN edge computing

Groupwise Pairwise Scheme for Wireless Sensor Networks

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Groupwise Pairwise Scheme for Wireless Sensor Networks

作者： Stephen anokye 湖南大学

学位级别：硕士

随着传感器网络应用的不断增长,传感器节点间通信链路的安全越来越受到人们的关注,并且已经有不少学者发表了相关的论文。由于传感器网络资源较为有限,传统的密钥管理机制如Diffie-Hellman和公钥管理机制都不适用于传感器网络。为了找... 详细信息

随着传感器网络应用的不断增长,传感器节点间通信链路的安全越来越受到人们的关注,并且已经有不少学者发表了相关的论文。由于传感器网络资源较为有限,传统的密钥管理机制如Diffie-Hellman和公钥管理机制都不适用于传感器网络。为了找出一种适用于传感器网络的密钥管理机制,我们提出了一种安全簇密钥管理机制,该机制是基于Chang, Perrig和Song提出的对称密钥以及随机对称密钥管理机制。在我们密钥管理机制中,网络中每个节点在部署前都被分配了一个唯一的节点ID。假设网络中节点的数目为n,在网络部署结束后,我们通过ACE分簇算法将网络中的n个节点分成m个分簇,每个分簇由簇头节点和簇成员节点组成。其中簇头节点负责收集簇内成员节点的传感数据,并且只有簇头可以与其邻居簇的节点进行通信,簇内的成员节点必须通过簇头节点的中继才能够与其邻居簇的节点进行通信。簇内的每对节点之间通过对密钥建立算法生成一个对密钥,该密钥用于保护两个节点之间通信链路的安全。每个簇的簇头节点和其邻近簇的簇头之间也通过对密钥建立算法生成一个对密钥,该密钥用于保护簇间通信的安全。试验证明,与原始方案以及随机对密钥管理机制相比,我们的方案具有更好的弹性和连通性。

关键词： Group Key Pairwise Key Wireless Sensor Networks

Measuring the effect of opportunity cost of time on participation in sports and exercise

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Open Journal of Preventive Medicine 2013年第5期3卷 380-392页

作者： Nana Kwame anokye Subhash Pokhrel Julia Fox-Rushby Health Economics Research Group (HERG) Brunel University Uxbridge Middlesex UK

Background: There is limited research on the association between opportunity cost of time and sports and exercise due to lack of data on opportunity cost of time. Using a sample of 14142 adults from Health Survey for England (2006), we develop and test a composite index of opportunity cost of time (to address the current issues with data constraint on opportunity cost of time) in order to explore the relationship between opportunity cost of time and sports participation. Methods: Probit regression models are fitted adjusting for a range of covariates. Opportunity cost of time is measured with two proxy measures: a) composite index (consisting of various indicators of wage earnings) constructed using principal component analysis;and b) education and employment, approach in the literature. We estimate the relative impact of the composite index compared with current proxy measures, on prediction of sports participation. Findings: Findings suggest that higher opportunity cost of time is associated with increased likelihood of sports participation, regardless of the time intensity of activity or the measure of opportunity cost of time used. The relative impacts of the two proxy measures are comparable. Sports and exercise was found to be positively correlated with income. Another important positive correlate of sports and exercise is participation in voluntary activity. The research and policy implications of our findings are discussed.

关键词： Physical Activity Sports and Exercise Opportunity Cost of Time Index

超声波与EDTA联用对污染土中Pb的去除效果及其作用机理

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

环境工程学报 2015年第7期9卷 3492-3496页

作者：张春雷费小通程成 Osei anokye Obed 河海大学环境学院南京210098

以人工配置的Pb污染土为对象,进行了超声波与EDTA单独及联合作用对污染土中Pb的去除实验,利用改进BCR法测定了不同作用下土中Pb的4种形态。结果表明,超声波单独作用时对土中Pb的去除率很低,EDTA单独作用时去除率可以达到55%~90%。二者... 详细信息

以人工配置的Pb污染土为对象,进行了超声波与EDTA单独及联合作用对污染土中Pb的去除实验,利用改进BCR法测定了不同作用下土中Pb的4种形态。结果表明,超声波单独作用时对土中Pb的去除率很低,EDTA单独作用时去除率可以达到55%~90%。二者联合作用下,可以明显缩短EDTA单独去除反应的时间、节省EDTA用量并增强去除效果。超声波与EDTA联用增强Pb去除的机理,可以被认为是超声波促进了土中残渣态的Pb向弱酸提取态（F1）和可还原态（F2）转化,而EDTA能够去除的Pb形态主要是F1和F2。对于实验土中Pb的去除来说,EDTA清洗起主导作用,超声波起加速和加强作用。

关键词：超声波 EDTA Pb 污染土去除重金属形态

Computed Tomography Protocol Optimisation for Pediatric Head Trauma: Radiation Dose and Image Quality Assessment

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2022年第3期11卷 160-175页

作者： Evelyn Anaafi Mary Boadu Albertina Rusandu Mercy Afadzi Kwame anokye Amoabeng Department of Medical Physics Graduate School of Nuclear and Allied Sciences University of Ghana Legon Sweden-Ghana Medical Center Accra Ghana Department of Circulation and Medical Imaging Norwegian University of Science and Technology (NTNU) Trondheim Norway Department of Physics Norwegian University of Science and Technology (NTNU) Trondheim Norway National Centre for Radiotherapy and Nuclear Medicine Korlebu Teaching Hospital Accra Ghana

Purpose: Children are sometimes examined with Computed Tomography protocols designed for adults, leading to radiation doses higher than necessary. Lack of optimisation could lead to image quality higher than what is needed for diagnostic purposes with associated high doses to patients. Optimising the protocols for paediatric head trauma CT imaging will reduce radiation dose. Objective: The study aimed to optimise radiation dose and assess the image quality for a set of protocols by evaluating noise, a contrast to noise ratio, modulation transfer function and noise power spectrum. Methods: Somaton Sensation 64 was used to scan the head of an anthropomorphic phantom with a set of protocols. ImageJ software was used to analyse the paediatric head image from the scanner. IMPACTSCAN dosimeter software was used to evaluate the radiation dose to the various organs in the head. MATLAB was used to analyse the Modulation Transfer Function and the Noise Power. Results: The estimated Computed Tomography Dose Index volume (CTDIvol) increased with increasing tube current and tube voltage. The high pitch of 0.9 gave a lower dose than the 0.5 pitch. The eye lens received the highest radiation dose (39.2 mGy) whiles the thyroid received the least radiation dose (13.7 mGy). There was an increase in noise (62.46) when the H60 kernel was used and a lower noise (8.829) was noticed when the H30 kernel was used. Conclusion: The results obtained show that the H30 kernel (smooth kernel) gave higher values for noise and contrast to noise ratio (CNR) than the H60 kernel (sharp kernel). The H60 kernel produced high values for the modulation transfer function (MTF) and noise power spectrum (NPS). The eye lens received the highest radiation dose.

关键词： Image Quality Radiation Dose Modulation Transfer Function Noise Power Spectrum Optimization