18 research outputs found
Accelerating technical change through video mediated agricultural extension
No full textAgricultural extension is crucial for promoting equality of opportunity among smallholders. Ethiopia has one of Africa’s largest extension systems: 1) 17.5 million smallholder farmers 2) 1 extension agent per 400-500 farmers.Non-PRIFPRI5; CRP2PIM; MTIDCGIAR Research Program on Policies, Institutions, and Markets (PIM
Accelerating technical change through video mediated agricultural extension
No full textPoster prepared for a share fair, Addis Ababa, May 201
Accelerating technical change through video mediated agricultural extension
No full textAgricultural extension is crucial for promoting equality of opportunity among smallholders. Ethiopia has one of Africa’s largest extension systems: 1) 17.5 million smallholder farmers 2) 1 extension agent per 400-500 farmers
Examining Heat Treatment Effects on Transformation of Iron Oxides and Crystallinity phase identification Dataset from Recovered Iron Hydroxide Electro-coagulated Sludge
No full textIron hydroxide Electro-coagulated sludge from the electrochemical processes of textile wastewater treatment plant have recovered and oxidative transformed iron oxides production with heat treatment were produced. Because hematite and magnetite iron oxides can be produce from iron hydroxide, electro-coagulated sludge as iron hydroxide rich sludge can be used iron oxides source for different application. Such as for catalyst, medical and commercial applications. Heat treatment of iron hydroxide with a certain temperature range will have an effect for magnetic nature iron oxides formation. Thus, EC sludge as iron hydroxide were used crystalliniry nature as well as phase identification. To this experiment, the author intends to use four critical temperature values as a base to examine the phase change by producing different iron oxides (α-Fe2O3, Fe3O4…). X-ray diffraction study using XRD machine as well as comparative examination with standard references, the international central diffraction data (ICDD) were investigated. The heat treatment from 300 oC to 800 oC have confirm us the iron oxide formation and at high temperature the patterns become more crystal formation
Utilizations of Electro-coagulated Sludge from Wastewater Treatment Plant data as an Adsorbent for Direct Red 28 Dye removal
No full textElectro-coagulated, EC, sludge from the electrochemical processes of textile wastewater treatment plant can be reuse as an adsorbent for a certain cationic and anionic azo dyes from textile and or leather industry effluents. Because EC sludge expected to have iron oxide and hydroxide during the electrochemical processes of wastewater treatment, it can be used for adsorptions for azo dye removal. Produced EC sludge can have positively charged surface, specially ferric and or ferrous surface charge. Thus, EC sludge as an adsorbent will have adsorption potential to adsorb acidic (anionic) dyes in the principles of electrostatic attraction. To this study, the author intends to use direct red 28 (DR28) dyes as a modal azo dye from the textile and or leather industry. Basic batch adsorption parameters (effect of dye concentration, solution pH, reaction temperature, mixing time and adsorbent dosage), as well as adsorption isotherm, kinetics, and thermodynamics study on to raw and calcined EC sludge were investigated. DR28 dye on to calcined EC adsorbent has recorded as highly removal efficiency at pH of 2, initial dye concentration of 20mg/L, time of 60 min, adsorbent dosage 1g/100mL and temperature of 25±2℃, ambient temperature
XRD analysis of recovered iron materials from electro-coagulated sludge
No full textIron hydroxide Electro-coagulated sludge from the electrochemical processes of textile wastewater treatment plant has recovered and oxidative transformed iron oxides production with heat treatment was produced. Because hematite and magnetite iron oxides can be produce from iron hydroxide, electro-coagulated sludge as iron hydroxide and oxy-hydroxide rich sludge can be used iron oxides source for different applications. Such as for catalyst, medical and commercial applications. Heat treatment of iron hydroxide with a certain temperature range will have an effect on magnetic nature iron oxides formation. Thus, EC sludge as iron hydroxide was used crystallinity nature as well as phase identification. To this experiment, the author intends to use four critical temperature values as a base to examine the phase change by producing different iron oxides (α-Fe2O3, Fe3O4…). X-ray diffraction study using the XRD machine as well as comparative examination with standard references, the international central diffraction data (ICDD) were investigated. The heat treatment from 300 oC to 800 oC have confirmed us the iron oxide formation and at high temperature, the patterns become more crystal formation
Barter in practice: a case study of liwac transaction in Addis Ababa
No full textThe author examines the contemporary liwac or barter system in Addis Ababa, a thriving part of the informal economy which involves the exchange of household goods for second-hand clothes and shoes. He concludes that this form of transaction positively co-exists with and is not superseded by the monetised economy.This article is hosted by our co-publisher Taylor & Francis.</p
Book reviews: Robert Guest (2004) “The Shackled Continent: Power, Corruption, and African Lives”
No full textOver the past two decades, extreme poverty has been decreasing in all regions of the world except for sub-Saharan Africa. This attracted the attention of many scholars and policymakers from Africa and other continents of the world to study and understand the reason why Africa has remained so poor. As a result, many scholars have advanced many reasons for poverty and underdevelopment on the continent. However, no consensus is reached among scholars for poverty and underdevelopment of Africa. 'The shackled continent' is one of the books that has attempted to explain the reasons why Africa has remained so poor. The main of this paper was to critically review the book. The shackled continent has critically analyzed and identified many hobbles that have affected the development process in Africa. In this regard, the author assumption is that Africa has remained so poor as a result of several factors which includes failures of leadership, tribal politics, bad governance, impacts of AIDs, resource curse, lack of transparent property rights, ethnic strife, corruption, frequent military coups, and development assistance failures. Guest admits that these reasons to some extent contribute to the Africans' development challenges. However, arguably failures of leadership are the main reason for underdevelopment in Africa. The author argues that global capitalism is merely a solution to Africa's problems. This book has many strengths as well as weaknesses
Improvement of Maintenance Management System: A Case Study on Walia Intercity Bus Service Enterprise
No full textThis thesis seeks to provide a greater depth into the exploration of the subject “Vehicle
Maintenance Management System” (VMMS). It is found that improved maintenance helps
to increase revenues of a firm by increasing vehicle or equipment performance and
availability. Most importantly, firms must have maintenance policies and strategies so that
the whole firm will be directed in the same direction to reduce equipment down time.
The purpose of this thesis is to improve the existing maintenance management system and
maintenance efficiency of the enterprise under consideration.
The establishment of effective and efficient maintenance management system is the
mechanism by which controllable costs are reduced and equipment availability is increased.
Controllable costs are the costs incurred due to improper decision during purchasing process
by selecting incompatible and cheap price items with out considering reliability and
maintainability, and costs incurred due to poor maintenance management system practiced
during operation. Thus, the main objective of this thesis is to examine the existing
maintenance of Walia Intercity Bus Service Enterprise (WIBSE) and recommend better
maintenance management system that enhances vehicle availability with reasonable
maintenance cost. The author believes upon implementation of the recommended
maintenance management system, availability of vehicles for transportation and useful life
are expected to increase due to minimizing of down time and abuse
Author Correction: Application of a convolutional neural network for predicting the occurrence of ventricular tachyarrhythmia using heart rate variability features
No full textAn amendment to this paper has been published and can be accessed via a link at the top of the paper
