Browsing by Author "Tesfaye Getachew"

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    Assessment of Procurement Procedure and Its Relation on Project Performance: In the Case of WEEMA International Inc-Ethiopia
    (Addis Ababa University, 2023-02) Tesfaye Getachew; Berhanu Denu (PhD)
    The purpose of the study was to unearth their relation between procurement procedure and project performance of WEEMA International Inc-Ethiopia. The study focused on the procurement procedure of WEEMA International Inc - Ethiopia and its relation on project performance on water point construction project among the four major program areas (water point construction, education, enhancing beekeeping and healthcare) of WEEMA Inc - Ethiopia. The study covered primary and secondary data collection through close ended questioner and related literature, analyzed and interpretation of the collected data. The research design used in the study was descriptive approach (tables, mean, standard deviation and percentages,) has been found necessary as the purpose of this research by the help of SPSS 21. The findings of this study revealed that there were a number of obstacles in the procurement process which hinder the effectiveness or performance in the procurement functions practices in WEEMA International Inc.– Ethiopia such as poor planning and Procurement Procedure practice, failure to identify the need of the organization, delay in tendering process, supplier selection process was some of the obstacles of the performance in the procurement functions. The responses from the whole categories of respondents conclude that there was a great interrelation between the procurement process and its effectiveness of the procurement function. The study recommends that WEEMA International Inc – Ethiopia, procurement procedure, tendering, and supplier selection wasn’t implemented in a sufficient way. Therefore, WEEMA International Inc - Ethiopia should overlook their internal assessment regarding on Procurement Procedure, tendering and supplier selection. In addition, company procurement process and employee skill development program to fill the gaps
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    Ecology of Regeneration and Phenology of Seven Indigenous Tree Species in A Dry Tropical Afromontane Forest, Southern Ethiopia
    (Addis Ababa University, 2008-04) Tesfaye Getachew; Fetene Masresha (Professor); Beck Erwin (Professor); Teketay Demel (PhD)
    The Munessa-Shashemene Forest, a typical dry afromontane forest located on the eastern escarpment of the Rift Valley at about 250 km from Addis Ababa, is under severe pressure due to logging, cattle grazing and conversion of the forest to arable land. Ecology of regeneration and phenology of seven indigenous tree species known to have considerable socio-economic and ecological importance were investigated. Seedling growth experiment within the forest was carried out in three light environments for 136 days and their survival followed for 12 months in the permanent plots. About 1200 understorey seedlings located systematically at different sites within the forest were marked and monitored for their mortality and herbivory rates for a period of 2 years. Seedling densities and their spatial distribution along gradients of altitude, disturbance and canopy light were investigated in the forest using quadrats having sizes of 10 m x 5 m along line transects. Tree and sapling densities, their spatial distribution along altitudes, and size-class distribution were investigated using quadrats of 20 m X 20 m along line transects. About 210 focal mature trees have been monitored for their leaf, flower and fruit every month for a period of two years. Various statistical tools and ecological software were employed for the data analyses. Seedling morphological and physiological traits showed significant variation among species and light levels. Seedling growths such as total plant biomass, height, total leaf area and root length were highly responsive to light levels while, specific leaf area, leaf area ratio, leaf, root and stem mass ratios were more of species-specific. Relative growth and net assimilation rates were highly influenced by the plant biomass. Understorey seedling mortality and herbivory rates year-1, respectively, ranged 11% (Podocarpus) – 67 % (Syzygium), and 0 (both Croton and Podocarpus) - 56 % (Celtis). They were significantly different between dry and wet seasons of the year. Mean densities of seedlings varied among species from 0 (Polyscias) to 5,334 (Prunus) individuals ha-1, while trees and saplings varied from 3 (Polyscias) to 102 (Podocarpus) plants ha-1. Size-class distributions of the species have shown three major groups:- (1) species with inverse J-shape curve, and thus having healthy regeneration status, (2) species with higher proportion of individuals in the lowest size-class, but missing individuals in the subsequent middle size-classes and thus hampered regeneration and; (3) species with no individuals in the lowest and middle height classes, but represented by large sized individuals only and thus at risk of local extermination. Better reproductive performance evidenced by high seedling densities (e.g. Celtis and Prunus) or adaptive defenses to herbivory (e.g. Croton and Podocarpus) were common attributes of healthy regenerating species. In deciduous species, the period of leaflessness/shedding lasted from January to March. Leaf flushing peaked in April coinciding with start of small rains. In most species, flowering pattern was strongly seasonal and annual. Unlike flowering, fruiting was non-seasonal and extended over several months of a year. The peak fruiting period was occured around mid to late of the long dry season. Rainfall and temperature triggered the phenological cycles in the tree species. In general, understorey light environment, drought (soil moisture stress), seedling herbivory damage, reproduction, and human disturbances were among the major factors affecting regeneration of tree species in the forest. Species of high conservation priority in the immediate future are Polyscias and Pouteria; while Celtis, Croton and Prunus are encouraged for sustainable utilization options. The implications of the results of seedling growth, survival, herbivory damage, plant population structure and phenology of the species are discussed in detail.
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    Impact of Smart Parking Developments as a Strategy for Addressing Parking Space Supply Problems: The Case of Megenagna and Markato Smart Parkings.
    (Addis Ababa University, 2022-07) Tesfaye Getachew; Tariku Jebena (PhD)
    Addis Ababa has recently been afflicted by a series of infrastructure and utility problems. The city government implemented the Smart Parking spaceSupply system to address the parking problem, which comprises the construction of multistory parking garages in two locations within densely developed and crowded districts. The performance of the Smart Parking for the surrounding development has been analyzed using both quantitative and qualitative data collection study methods. The study gathered data using a variety of methods, including semi-structured and open-ended surveys, interviews, observation, and mapping using a readily available base map. After that, the data was processed and presented in an Excel spreadsheet. The effectiveness of the present smart parking supply was assessed, and the data of the respondents was analyzed using a data triangulation study design approach. Using the Scott M. Smith technique, the researcher picked 122 respondents purposely: 14 for a neighboring Smart Parking buildings blocks, 101 for SP users (Automobile drivers) on the chosen two sites, and 6 for government expertise, such as offices like (AATMA), (AATB), and (AATP). After triangulating and analyzing the data, the research indicated a supply imbalance in the current smart parking space supply based on demand for parking spaces in surrounding buildings. Dissatisfaction among drivers with the automated steel structure parking system, as well as a lack of attention and poor integration with key government agencies and stakeholders, are all significant hurdles for the new SP development. As a result, its overall effects on city parking supply demand appear to be negligible, based on current MSP and MAMSP space supply around the CBD and THC based on empirical real city traffic volume evidence. It is also recommended that, the needs of clearwritten car parking supply developments strategy and policy which will align with theobjectives of significant parking facility supplies based on supply demand. The study will also help and encourage forfurther investigation to other researchers. Keywords: Smart Parking, Supply demand, and congestion