The locomotive crash box is an energy-absorbing device that reproduces a crash sound effect during locomotive head-on collisions. Addis Ababa- Djibouti railway is a single-track railway mostly significant head-to-head collisions. Satisfactory achievement of the energy-absorbing crash box arises in...
In this study, the effect of sleeper spacing, and sleeper materials on wheel rail contact mechanics was investigated. The selected sleeper materials were; concrete, timber (F34) grade, structural steel, and the selected values of sleeper spacing were; 500 mm, 600 mm (the current Addis Ababa light...
Railway pre-stressed concrete sleepers are an integral part of the railway track as they hold and move the wheel loads from the rails to the track foundation. Prestressed concrete sleepers are subjected to various types of static load condition after a certain time, which can lead to some reduction...
The objective of the study was to examine the challenges faced by Ethiopian Premier League clubs in case of management. The target population of the study was football clubs participating in 2012 participating in Ethiopian football premier league. Out of 16(N=16) of the target populations of the...
Railway axle like other part of a wheelset is very important for achieving the propulsion of a rail vehicle. However, in case of safety of passengers, railway staff and Freight, care required to avoid failure of the railway axle in-service. In this thesis, the investigation of fatigue failure...
Today's news production and consumption are not the same as in the past. The growth of media technology is one of the key drivers of this transition. Social media, for example, allows us to freely communicate and share any massage we have with friends via Facebook, Twitter, and YouTube, among...
Expansive soils undergo high volume change due to cyclic swelling and shrinkage behavior during the wet and dry seasons. Thus, such problematic soils should be completely avoided or properly treated when encountered as subgrade materials. In the present study, the biomedical waste incinerator ash...
Repeated bouts of Group A streptococcal throat infection, if left untreated, could result inRheumatic Heart Disease (RHD). RHD is believed to significantly affect health-related qualityof life (HRQoL) due to its chronicity, scarce treatment options and downward debilitatingrnprognosis. This study...
Atomically thin two-dimensional layered semiconductor materials such as Transition Metal Dichalcogenides (TMDs) have a great potential for solar cells applications due to their favorable photon absorption and electronic transport properties. The combination of 2D materials in the form of van der...
Titanium dioxide is a well-known photocatalyst for the photodegradation of dyes like methylene blue. However, its application is limited due to its wide bandgap and higher recombination rate of photogenerated electrons and holes. This work shows that doping transition metals lead to reducing the...
This research is conducted to investigate the use of social media as a PR tool among humanitarian organizations in Ethiopia by taking the specific case of the Ethiopian Red Cross Society (ERCS). The study also specifically assesses whether the ERCS is adopting social media as a PR tool or not, the...
Recent research on the Janus transition metal dichalcogenide (JTMD) with an asymmetric structure has revealed that this material possesses interesting unique properties, notably in solar cells. This work is based on cutting-edge density functional theory (DFT) computations utilizing Generalized...
Background; Healthcare-associated urinary tract infections are one of the most commonrncomplications in hospitalized patients particularly in intensive care unit patients. Both bacteriarnand yeast, are implicated as the etiological agents of urinary tract infections. rnObjective: To determine the...
Background: Low back pain(LBP) is defined as pain coming from between the lower ribrnmargins and the gluteal folds. It is usually accompanied by pain and neurological symptoms inrnthe lower limbs. Lumbar degenerative disc disease constitutes a group of degenerative pathologicrnchanges that are...
Background: Emergency contraception (EC) or post-coital contraception refers to any methodsrnof contraception that can be used to prevent pregnancy in the first few days after exposure tornunprotected sexual intercourse. Unwanted pregnancy and its potential life threateningrncomplications could be...
The major purpose of this study was to assess the practice, challenges, and opportunities of rnparental support for children with intellectual disability at Tekelehayimanot general primary rnschool. To achieve the stated objectives, a case study, and qualitative research design were used.rnParents,...
Background: Gestational weight gain is the amount of weight gained between conception andrnjust before the birth of the infant where trimester specific weight gain is the weight gained inrnbetween each trimester. Both excess and inadequate weight gain have short and long-termrnconsequences for both...
This study explored the unmet psychosocial needs of women diagnosed with breast cancerrnundergoing treatment in Addis Ababa University College of Health Science Oncology Centerrnand their existing coping strategy. Qualitative design was used, taking a descriptivernphenomenological approach. Nine...
Background: The job of waste cleaners are characterized by lifting, pulling, carrying and pushing healthrncare wastes containers that potentially expose them to different ergonomics problems and physical injuries.rnThere are also hazardous and nonhazardous wastes that requires due attention. There...
Agriculture is the major pillar of Ethiopia’s economy. The livestock sector is one part of agriculture, accounting for about 45% of the total value of agricultural production. Simulation method and genomic selection approaches were implemented to select superior animals for the aim of...