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Assessing the efficacy of the Mental Health Gap Action Programme (mhGAP) training for non-specialized health workers in Ethiopia

Bruni, Andrea
Fonte: Universidade Nova de Lisboa Publicador: Universidade Nova de Lisboa
Tipo: Dissertação de Mestrado
Publicado em //2014 ENG
Relevância na Pesquisa
37.02%
RESUMO: A OMS lançou em 2008, o Programa de Acção do Gap em Saúde Mental (mhGAP) para suprir a falta de cuidados, especialmente em países de rendimento baixo e médio, para as pessoas que sofrem de perturbações mentais, neurológicas e de uso de substâncias (MNS). Um componente crucial do mhGAP é representado pelo esforço no sentido da integração da saúde mental nos cuidados de saúde primários. Na Etiópia, o mhGAP foi monitorizado durante 3 anos, graças a um projeto de demonstração implementado em clínicas selecionadas em quatro regiões do país. A fase de demonstração de mhGAP na Etiópia traduziu-se principalmente na formação de profissionais de saúde não especializados, fornecendo-lhes orientação e supervisão apoiada para a utilização de medicamentos psicotrópicos essenciais e na coordenação com o Ministério Etíope Federal da Saúde, Hospital Amanuel de Saúde Mental e as Secretarias Regionais de Saúde ( RHBs ). O presente trabalho investigou a eficácia do pacote de formação mhGAP através de uma análise das pontuações dos participantes no pré- e pós-testes. A análise estatística mostrou - com uma exceção - que a melhoria dos formandos é estatisticamente significativa, o que sugere que os conhecimentos dos participantes é melhorada na fase de pós-teste. A eficácia do pacote de formação mhGAP para profissionais de saúde não especializados é uma evidência promissora de que os mesmos podem ser treinados com sucesso para realizar um pacote básico de intervenções para a prestação de cuidados e tratamento para pessoas com perturbações mentais...

Prevalence and Correlates of Mental Distress Among Working Adults in Ethiopia

Gelaye, Bizu; Lemma, Seblewengel; Deyassa, Negussie; Bahretibeb, Yonas; Tesfaye, Markos; Berhane, Yemane; Williams, Michelle A
Fonte: Bentham Open Publicador: Bentham Open
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
36.92%
Objective: To evaluate the prevalence of mental distress and its correlates among working Ethiopian adults. Methods: This cross-sectional study of 2,180 individuals (1,316 men and 864 women) was conducted among working adults in Addis Ababa, Ethiopia. A structured questionnaire was used to collect information on socio-demographic and lifestyle characteristics of participants. Mental distress was assessed using the self-reporting questionnaire (SRQ). Logistic regression was employed to estimate adjusted odds ratios (OR) and 95% confidence intervals (95% CI). Results: The prevalence of mental distress in the study sample was 17.7% (25.9% in women and 12.4% in men). Younger participants (age ≤24 years) had the highest prevalence of mental distress (35.5% in women and 16.7% in men). The odds of mental distress was 2.47-fold higher among women as compared with men (OR=2.47, 95% CI 1.97-3.09). Participants reporting excellent health status had a 50% reduced odds of mental distress (OR=0.47; 95%CI: 0.38-0.59); and moderate alcohol consumption was associated with a slight increased odds of mental distress (OR=1.26; 95%CI: 1.00-1.67). Conclusion: A high prevalence of mental distress was observed among working adults in Ethiopia. Our findings suggest that the workforce institutions should provide targeted prevention and intervention programs to improve the mental health state of their employees. National mental health policy that clearly outlines and addresses mental distress among working adults is also warranted.

Barriers to providing quality emergency obstetric care in Addis Ababa, Ethiopia: Healthcare providers’ perspectives on training, referrals and supervision, a mixed methods study

Austin, Anne; Gulema, Hanna; Belizan, Maria; Colaci, Daniela S; Kendall, Tamil; Tebeka, Mahlet; Hailemariam, Mengistu; Bekele, Delayehu; Tadesse, Lia; Berhane, Yemane; Langer, Ana
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
EN_US
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Background: Increasing women’s access to and use of facilities for childbirth is a critical national strategy to improve maternal health outcomes in Ethiopia; however coverage alone is not enough as the quality of emergency obstetric services affects maternal mortality and morbidity. Addis Ababa has a much higher proportion of facility-based births (82%) than the national average (11%), but timely provision of quality emergency obstetric care remains a significant challenge for reducing maternal mortality and improving maternal health. The purpose of this study was to assess barriers to the provision of emergency obstetric care in Addis Ababa from the perspective of healthcare providers by analyzing three factors: implementation of national referral guidelines, staff training, and staff supervision. Methods: A mixed methods approach was used to assess barriers to quality emergency obstetric care. Qualitative analyses included twenty-nine, semi-structured, key informant interviews with providers from an urban referral network consisting of a hospital and seven health centers. Quantitative survey data were collected from 111 providers, 80% (111/138) of those providing maternal health services in the same referral network. Results: Respondents identified a lack of transportation and communication infrastructure...

Impacts of maternal mortality on living children and families: A qualitative study from Butajira, Ethiopia

Molla, Mitike; Mitiku, Israel; Worku, Alemayehu; Yamin, Alicia Ely
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
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Background: The consequences of maternal mortality on orphaned children and the family members who support them are dramatic, especially in countries that have high maternal mortality like Ethiopia. As part of a four country, mixed-methods study (Ethiopia, Malawi, South Africa, and Tanzania) qualitative data were collected in Butajira, Ethiopia with the aim of exploring the far reaching consequences of maternal deaths on families and children. Methods: We conducted interviews with 28 adult family members of women who died from maternal causes, as well as 13 stakeholders (government officials, civil society, and a UN agency); and held 10 focus group discussions with 87 community members. Data were analyzed using NVivo10 software for qualitative analysis. Results: We found that newborns and children whose mothers died from maternal causes face nutrition deficits, and are less likely to access needed health care than children with living mothers. Older children drop out of school to care for younger siblings and contribute to household and farm labor which may be beyond their capacity and age, and often choose migration in search of better opportunities. Family fragmentation is common following maternal death, leading to tenuous relationships within a household with the births and prioritization of additional children further stretching limited financial resources. Currently...

Parents’ perception of child and adolescent mental health problems and their choice of treatment option in southwest Ethiopia

Abera, Mubarek; Robbins, Jeffrey M.; Tesfaye, Markos
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
EN_US
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Background: Parents’ perception and awareness about psychiatric illness in children and adolescents is an important determinant of early detection and treatment seeking for the condition. However, there has been limited information about the perception and awareness of parents about these issues as well as their preferred treatment options in Ethiopia. This study is, therefore, aimed at assessing the perception of parents about psychiatric illness in children and adolescents and their preferred treatment options in Jimma, Ethiopia. Method A cross-sectional study was conducted among 532 parents in Jimma City, Ethiopia from April to May 2013. Parents from the city were invited to participate in this study to assess their knowledge on causes, and manifestations of psychiatric illness in children and adolescents as well as their preferred treatment options if their children exhibited signs and symptoms of mental illness. Results: Nearly three quarters of the parents identified genetic factors while approximately 20 % of them mentioned neuro-chemical disturbance as possible causes of their children’s mental health problems. On the other hand, magic, curse, and sin were mentioned as causes of mental health problems by 93.2, 81.8 and 73.9 % of the parents...

Establishment of Cotesia flavipes (Hymenoptera : braconidae) in sugarcane fields of Ethiopia and origin of founding population

Assefa, Y.; Mitchell, A.; Conlong, D.; Muirhead, K.
Fonte: Entomol Soc Amer Publicador: Entomol Soc Amer
Tipo: Artigo de Revista Científica
Publicado em //2008 EN
Relevância na Pesquisa
37.08%
Cotesia flavipes (Cameron) (Hymenoptera: Braconidae) is used as a classical biological control agent against Chilo partellus (Swinhoe) (Lepidoptera: Crambidae), a serious exotic pest of cereal crops in eastern and southern Africa. This parasitoid has been introduced into several African countries for the control of C. partellus in maize, Zea mays L., and sorghum, Sorghum bicolor (L.), but it has never been released in Ethiopia. It is hypothesized that it spread into Ethiopia from populations released in Kenya and Somalia to become the predominant parasitoid of C. partellus in maize and sorghum fields of the country. In recent surveys conducted in Ethiopia, C. flavipes was recovered from C. partellus in sugarcane, Saccharum L. spp. hybrids, at a site >2,000 km from the nearest known release sites in Kenya and Somalia. These findings question published hypotheses that estimate the dispersal rate of C. flavipes to be 60 km per year in Africa, and they suggest that since its release in Africa this parasitoid has developed strains adapted to searching particular host plants infested by particular stem borers. The anomalies between our results and previous reports evoked the hypothesis that C. flavipes in Ethiopian sugarcane might be a different strain. To test this hypothesis...

Community home based care for people living with HIV: an overview of client needs, actors and services provided in Ethiopia; Community Home-based care

Woldie, M.; Sudhakar, M.; Feyissa, G.T.
Fonte: Academic journals Publicador: Academic journals
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
37.08%
In Ethiopia, it was shown that funding levels are far from compatible to the needs for care and support services for people living with human immuno-deficiency virus (PLHIV) and orphaned and vulnerable children (OVC). The aim in this study is to map the relationship between client needs, actors, care and support services provided for PLHIV and OVC in Ethiopia. A case study of the Ethiopian community care program was carried out using multiple methods of data collection as part of a multi-country research of four countries. Three program cases providing care and support services throughout the country were studied. A total of 35 in-depth interviews, 9 focus group discussions, 60 guided interviews, and 3 community mapping exercises were carried out. Analysis was conducted using the thematic framework approach with coding and mapping of the transcripts in the ATLAS.ti version 5.0. The expansion of antiretroviral therapy (ART) has reduced the number of bed-ridden PLHIV in need of home based nursing care. Currently, inadequate access to food and lack of income to cover health care and other expenses are the major concerns of PLHIV in Ethiopia. Community Home Based Care (CHBC) in Ethiopia can be categorised into two types; clinical and non-clinical. Non-clinical care (psychosocial...

Narratives beyond the Knife: Food Contexts as Converging and Diverging Zones in Christian-Muslim Encounters in Ethiopia

Zellelew, Tilahun Bejitual
Fonte: Universität Tübingen Publicador: Universität Tübingen
Tipo: Dissertação
EN
Relevância na Pesquisa
37.08%
Abstract This study attempts to answer questions related to the role of culinary and dietary discursive practices in the process of religious identity formations and thereby of interreligious encounters. Particularly it explores the Muslim-Christian encounters in Ethiopia in food contexts such as at wedding feasts. Ethiopian Orthodox Christians and Ethiopian Muslims have a unique encounter in some socio-cultural settings that involve food/eating because of a peculiar religious food taboo of avoiding meat slaughtered by people of the other faith. This custom, which has been practiced for many centuries, has been disapproved by some as “prejudice”, “a sign of mutual aversion”, and “a barrier” in their relations. It thus seems to be in continuous battle equally against sectarian and secular pressures. The overall system built around it, however, merits investigation to understand the dynamics of the micro-level Christian-Muslim encounters in Ethiopia. The study has thus adopted several theoretical approaches in order to explore the virtues of this custom and its implication for contemporary pluralist and multi-confessional societies. It has employed semiotic analysis, narrative analysis, speech act theory, affect theory, and critical discourse analysis...

ETHNOGRAPHY OF RESISTANCE POETICS: Power and Authority in Salale Oromo Folklore and Resistance Culture (Ethiopia, Northeast Africa)

Dibaba, Assefa Tefera
Fonte: [Bloomington, Ind.] : Indiana University Publicador: [Bloomington, Ind.] : Indiana University
Tipo: Doctoral Dissertation
EN
Relevância na Pesquisa
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Thesis (Ph.D.) - Indiana University, Folklore and Ethnomusicology, 2015; ETHNOGRAPHY OF RESISTANCE POETICS: Power and Authority in Salale Oromo Folklore and Resistance Culture (Ethiopia, Northeast Africa) This dissertation is an interdisciplinary folkloristic search for resistance poetics in tradition-oriented folklore of the Salale Oromo in central Ethiopia using both a diachronic and a synchronic approach. The Salale are part of the Tulama branch of the Oromo nation who are engaged in a national liberation struggle. Drawing on critical ethnographic methods, this study provides a folkloristic outline of power and authority in the resistance culture of the people based on the data I collected in Salale in 2009 and 2010 through interviews, focus-group discussions, and participatory observations into the notion of “progressive folklore.” The data shows that the meaning of Salale resistance poetics transcends the ephemeral common understanding of the resistance concept. Here resistance is not used as shorthand just to refer to social protest, peasant rebellion, or more preferably, banditry; it is rather the poetics of emancipatory act. An emancipatory resistance is not simply a strategic plan to change the status quo...

Applying the InterVA-4 model to determine causes of death in rural Ethiopia

Weldearegawi, B.; Melaku, Y.A.; Spigt, M.; Dinant, G.J.
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Artigo de Revista Científica
Publicado em //2014 EN
Relevância na Pesquisa
36.92%
BACKGROUND: In Ethiopia, most deaths take place at home and routine certification of cause of death by physicians is lacking. As a result, reliable cause of death (CoD) data are often not available. Recently, a computerized method for interpretation of verbal autopsy (VA) data, called InterVA, has been developed and used. It calculates the probability of a set of CoD given the presence of circumstances, signs, and symptoms reported during VA interviews. We applied the InterVA model to describe CoD in a rural population of Ethiopia. OBJECTIVE: VA data for 436/599 (72.7%) deaths that occurred during 2010-2011 were included. InterVA-4 was used to interpret the VA data into probable cause of death. Cause-specific mortality fraction was used to describe frequency of occurrence of death from specific causes. RESULTS: InterVA-4 was able to give likely cause(s) of death for 401/436 of the cases (92.0%). Overall, 35.0% of the total deaths were attributed to communicable diseases, and 30.7% to chronic non-communicable diseases. Tuberculosis (12.5%) and acute respiratory tract infections (10.4%) were the most frequent causes followed by neoplasms (9.6%) and diseases of circulatory system (7.2%). CONCLUSION: InterVA-4 can produce plausible estimates of the major public health problems that can guide public health interventions. We encourage further validation studies...

Cuba's involvement in Angola and Ethiopia: a question of autonomy in Cuba's relationship with the Soviet Union

Kessler, Stephanie Schehara
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: viii, 116 p. ; maps.
EN_US
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Approved for public release, distribution is unlimited; This thesis examines Cuban involvement in Angola and Ethiopia in light of Cuba's Foreign policy and Cuban Soviet relations. Utilizing the two case studies, it analyzes the degree to which Cuban activities in Africa were Soviet directed or Soviet sponsored. The conclusion is that Cuba exhibited substantial relative autonomy in Angola, but limited autonomy in Ethiopia. That conclusion is applied to Cuba in the 1990's, in which the current wave of democracy spreading throughout Eastern Europe and the improved relations between the Soviet Union and the United States have resulted in increased pressures on Cuba's foreign and domestic policies. Four scenarios are posited for Cuba's future. Finally, the thesis discusses whether the levels of autonomy attained in the 1970's can be equalled in the 1990's . A superpower who supplies a country with economic and military aid does not necessarily buy the right to wield coercive influence over that country's foreign or domestic policy. However, the aid that is provided may have a significant impact on the capabilities of the country. In the case of Cuba, without Soviet assistance in the early 1970's in building up and training the Cuban Armed Forces...

In the company of Lyäsus : the Jesuit mission in Ethiopia, 1557-1632

MARTINEZ D'ALOS-MONER, Andreu
Fonte: Instituto Universitário Europeu Publicador: Instituto Universitário Europeu
Tipo: Tese de Doutorado
EN
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37.08%
Defence date: 23 January 2009; Examining Board: Prof. Gérard Delille (EUI) - supervisor Prof. Giulia Calvi (EUI) Prof. Donald Crummey (University of Illinois) Prof. Carlos Martinez Shaw (UNED, Madrid); This study focuses on the Jesuit mission in Ethiopia (1557-1632). It presents a comprehensive history of the mission, from its inception during the reign of the Portuguese King Dom Manuel I, through its phase of expansion up to the expulsion of the Jesuit missionaries. Being the first mission personally conceived by the founder of the Society of Jesus, Ignatius of Loyola, the Ethiopian was also the last of the 'imperial' undertakings of the Society to fall, after the collapse of the projects in Japan and Mughal India in the 1610s and 1620s, respectively. The Ethiopian enterprise unfolded in lands far beyond Spanish or Portuguese control and under the protection of a powerful regional monarchy, the Ethiopian Solomonic House. The mission, which had a modest beginning during the last decades of the sixteenth century, turned in the next century to be an ambitious project of transformation of Ethiopian church and society. The Jesuits made use of a persuasive approach, their intellectual supremacy and links to sophisticated cultures - Renaissance and Manneristic Europe and Mughal India - to win over Ethiopian nobility...

Khat use in people living with HIV: a facility-based cross-sectional survey from South West Ethiopia

Soboka, M.; Tesfaye, M.; Feyissa, G.T.; Hanlon, C.
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
36.92%
Background: Khat is an evergreen plant with leaves containing the amphetamine-like compounds cathinone and cathine. Many people in the Horn of Africa use khat on a regular basis. Adverse health and social consequences of khat use have been described but little is known about the use of khat in people living with Human Immunodeficiency Virus (PLHIV) in Ethiopia. This study aimed to assess the prevalence of khat use and factors associated with khat use among PLHIV who are in contact with HIV services in a hospital in south-west Ethiopia. Methods: A cross-sectional study was conducted among 389 PLHIV who attended HIV services at Jimma University Specialized Hospital in September 2012. A structured questionnaire, translated into the local languages, was used to ask about the frequency of khat use and potential risk factors and consequences of khat use in this patient group. Logistic regression analysis was used for bivariate and multivariable analysis. Results: The overall prevalence of current khat use among people living with HIV was 23.0%. The prevalence was 18.3% in females and 33.6% in males. Christians were less likely to use khat when compared to Muslims (adjusted Odds Ratio (aOR) 0.26, 95% CI = 0.13, 0.55). There was a positive association between khat use and mental distress (aOR 1.84...

Borderless world vs borders as walls: insights from a borderland group in northern Ethiopia

Dias, Alexandra Magnólia
Fonte: Instituto Universitário de Lisboa Publicador: Instituto Universitário de Lisboa
Tipo: Parte de Livro
Publicado em 06/02/2013 ENG
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36.92%
The border between Eritrea and Ethiopia changed status frequently from the 19th century up to Eritrea’s independence (Triulzi, 2006: 7). With the creation of Eritrea as an Italian colony and prior to the incorporation of Ethiopia into the Italian East African Empire the border was defined according to colonial treaties. However, the border waxed and waned over the decades of their political coexistence. Indeed, the border's status shifted from a mere internal-administrative marker to a colonial border, to dissolution, to an inter-state border during the one-decade federation, became an internal border again, went through a phase of contested no-man’s-land during the civil war and, finally, acquired the status of an international border between two sovereign states. Prior to the outbreak of hostilities in May 1998 the border had never been delimited or demarcated. For all practical purposes the ethnic groups straddling the border continued their usual daily business regardless of the borderline. For borderland groups Eritrea’s independence was of secondary importance in the face of the general sense of security generated by the end of the civil war against the Derg.

The indigenous & the foreign - The Jesuit Presence in 17th Century Ethiopia

Boavida, Isabel; Pennec, Hervé; Ramos, Manuel João
Fonte: Instituto Universitário de Lisboa Publicador: Instituto Universitário de Lisboa
Tipo: Outros
Publicado em //2005 ENG
Relevância na Pesquisa
36.92%
In the rural plateaux of northern Ethiopia, one can still find scattered ruins of monumental buildings alien to the country's ancient architectural tradition. This little-known and rarely studied architectural heritage bears silent witness to a fascinating if equivocal cultural encounter that took place in the 16th-17th centuries between Orthodox Ethiopians and Catholic Europeans. The Indigenous and the Foreign explores the enduring impact of the encounter on the religious, political and artistic life of Christian Ethiopia, one not readily acknowledged, not least because the public conversion of the early 17th-century King Susenyos to Catholicism resulted in a bloody civil war enveloped in religious intolerance.

Sapropels and the age of hominins Omo I and II, Kibish, Ethiopia

McDougall, Ian; Brown, F H; Fleagle, John
Fonte: Academic Press Publicador: Academic Press
Tipo: Artigo de Revista Científica
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The provenance and age of two Homo sapiens fossils (Omo I and Omo II) from the Kibish Formation in southern Ethiopia have been much debated. Here we confirm that Omo I and the somewhat more primitive-looking Omo II calvariae are from similar stratigraphic

Characterization of Indigenous Goat Populations in Selected Areas of Ethiopia.

GATEW, H.; HASSEN, H.; KEBEDE, K.; HAIDE, A.; LOBO, R. N. B.; YETAYEW, A.; RISCHKOWSKY, B.
Fonte: American-Eurasian Journal of Scientific Research, v. 10, n. 5, p. 287-298, 2015. Publicador: American-Eurasian Journal of Scientific Research, v. 10, n. 5, p. 287-298, 2015.
Tipo: Artigo em periódico indexado (ALICE)
EN
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Abstract: The objective of this study was to characterize Bati, Borena and Short-eared Somali goat populations kept under traditional management systems. The survey conducted in three locations; namely Bati, Borena and Siti (the previous Shinille) representing Bati, Borena and Short-Eared Somali goat populations, respectively. For production systems description a total of 345 households (98 in Bati, 132 in Borena and 115 in Siti) were interviewed. Phenotypic records were also taken on 601(162 Bati (128 females and 34 males), 246 Borena (201 females and 45 males) and 193 Short-eared Somali (139 females and 54 males)) heads of adult goats with 4 pair of permanent incisors (PPI). However, because of difficulty of finding adequate number of 4PPI sample males, measurements were taken from 2PPI and above males. In this study, goats accounted 72.01%, 50.93% and 47.38% of other livestock species in Siti, Bati and Borena areas, respectively. The average (±SE) goat flock size (44.02±3.33) per household of Siti was significantly (p<0.05) higher than those observed in Borena (23.08±1.94) and Bati (8.99±0.59). The major challenges of goat rearing in the studied areas include feed and water shortage, disease incidence and recurrent drought with different order of prioritization. Plain brown (deep and light) (51.85%) coat color was the predominant coat color observed on Bati goats of both sexes. Meanwhile...

Unintended pregnancy among female sex workers in Mekelle city, northern Ethiopia: a cross-sectional study

Weldegebreal, R.; Melaku, Y.A.; Alemayehu, M.; Gebrehiwot, T.G.
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
36.92%
BACKGROUND: Unintended pregnancy is a significant public health concern in the world. Particularly, female sex workers are exposed to the risk of unintended pregnancy, abortion and their consequences. The aim of this study was, therefore, to assess unintended pregnancy and associated factors among female sex workers in Mekelle city, northern Ethiopia. METHODS: A community based cross-sectional study was conducted among 346 female sex workers from five Kebelles (smallest administrative units in Ethiopia) of Mekelle city from March-April, 2014. Sex workers were selected with simple random sampling technique using sampling frame obtained from urban health extension program. Epi-data version 3.1 was used to enter data and analysis was done using SPSS version 20. Bivariate and multivariate logistic regressions were performed to identify factors associated with unintended pregnancy using odds ratio and 95% confidence interval with P-value of 0.05. RESULTS: The magnitude of unintended pregnancy among female sex workers in the past two years was 28.6%. During this period, 59 women had abortion which represents three-fifths, (59.6%), of those who had unintended pregnancies, and 17.1% of all female sex workers. Female sex workers who gave birth and had history of abortion formerly had 3.1 (AOR = 3.07...

Gombe group basalts and initiation of pliocene deposition in the Turkana depression, northern Kenya and southern Ethiopia

Haileab, Bereket; Brown, F H; McDougall, Ian; Gathogo, P
Fonte: Cambridge University Press Publicador: Cambridge University Press
Tipo: Artigo de Revista Científica
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A little before 4 Ma ago, deposition of Pliocene and Pleistocene strata described as the Omo Group began in the Turkana and Omo basins of northern Kenya and southern Ethiopia. Soon after, basaltic magma erupted as thin lava flows, and intruded as dykes into the oldest Pliocene strata of the basin. These flows and intrusions are similar petrographically and geochemically, and mark a basaltic magmatic event spanning latitudes from 2°45′ N to 6°45′ N at a longitude of about 36° E. By 3.94 Ma, this basaltic magmatic activity had ceased. Previous researchers used these lavas as an important seismic marker in their study of the southern part of the Turkana Basin. Subsequent volcanic eruptions formed North, Central and South islands in Lake Turkana, and the Korath Range in southern Ethiopia. Thus there was a hiatus in basaltic magmatic activity of nearly 4 Ma in the area presently occupied by Lake Turkana and the lower Omo Valley, although volcanism continued on the eastern margin of the basin. Here we review the field occurrences of these basalts, their distinctive petrography, composition, age and significance to Pliocene deposition in the basin.

The tectonostratigraphy, granitoid geochronology and geological evolution of the Precambrian of southern Ethiopia

Yibas, B; Reimold, W U; Armstrong, Richard; Koeberl, Christian; Anhaeusser, C.R.; Phillips, David
Fonte: Pergamon-Elsevier Ltd Publicador: Pergamon-Elsevier Ltd
Tipo: Artigo de Revista Científica
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Two distinct tectonostratigraphic terranes, separated by repeatedly reactivated deformation zones, are recognised in the Precambrian of southern Ethiopia: (1) granite-gneiss terrane, which is classified into sub-terranes and complexes, and (2) ophiolitic