Solomon Kibret, Yihenew Alemu, Eline Boelee, Habte Tekie, Dawit Alemu, Beyene Petros,
... Laboratory. We thank Mr Deribe Feyissa, Mr Eba Tucho and Mr Hailu Engida and Mr Asegid Taye ...
Tópico(s): Insect Resistance and Genetics
2009 - Wiley | Tropical Medicine & International Health
Wakshum Mekonnen Tucho, Hilde J. Venvik, John C. Walmsley, Marit Stange, R. Arumugam, Ragnvald H. Mathiesen, A. Borg, Rune Bredesen, Randi Holmestad,
Tópico(s): Advanced materials and composites
2009 - Springer Science+Business Media | Journal of Materials Science
Wakshum Mekonnen Tucho, Hilde J. Venvik, Marit Stange, John C. Walmsley, Randi Holmestad, Rune Bredesen,
The effects of thermal treatments in air and in N2/Ar atmospheres on H2 permeation of self-supported 5 and 10 μm Pd/23 wt% Ag membranes prepared by magnetron sputtering are investigated. After hydrogen flux stabilization at 300 °C, the membranes were annealed in air at 300 °C or in N2/Ar at 300/400/450 °C for 4 days and then tested for hydrogen permeation at 300 °C. Air treatment generally induced improved permeation for all thicknesses. For the treatments in N2/Ar, permeability generally depends on ...
Tópico(s): Ammonia Synthesis and Nitrogen Reduction
2009 - Elsevier BV | Separation and Purification Technology
... was simply a monkey on a stick ( un tucho de palo )”; students then hacked up smaller icons ...
Tópico(s): Political and Social Dynamics in Chile and Latin America
2009 - Cambridge University Press | The Americas A Quarterly Review of Latin American History
J.E. Fernández, R. Fernández, Roberto Díaz, R. Tucho Navarro,
Tópico(s): Metal Alloys Wear and Properties
2003 - Elsevier BV | Wear
Thijs Peters, Wakshum Mekonnen Tucho, R. Arumugam, Marit Stange, John C. Walmsley, Randi Holmestad, A. Borg, Rune Bredesen,
The long-term stability of Pd–23%Ag/stainless steel composite membranes has been examined in H2/N2 mixtures as a function of both temperature and feed pressure. During continuous operation, the membrane shows a good stability at 400 °C while the N2 leakage increases very slowly at a temperature of 450 °C (Pfeed = 10 bar). After 100 days of operation (Pfeed = 5–20 bar, T = 350–450 °C), the N2 permeance equals 7.0 × 10−9 mol m−2 s−1 Pa−1, which indicates that the H2/N2 permselectivity still lies around 500, based ...
Tópico(s): Electrocatalysts for Energy Conversion
2008 - Elsevier BV | Journal of Membrane Science
R. Arumugam, Wakshum Mekonnen Tucho, A.L. Mejdell, Marit Stange, Hilde J. Venvik, John C. Walmsley, Randi Holmestad, Rune Bredesen, A. Borg,
Tópico(s): Nanoporous metals and alloys
2010 - Elsevier BV | Applied Surface Science
Wakshum Mekonnen Tucho, Henrik Mauroy, John C. Walmsley, Stefano Deledda, Randi Holmestad, Bjørn C. Hauback,
Tópico(s): Mechanical and Optical Resonators
2010 - Elsevier BV | Scripta Materialia
R. Tucho Navarro, Ascensión Vicente, Antonio José Ortiz Ruiz, Luis Alberto Bravo,
The purpose of this study was to evaluate the effects of Coca-Cola® and Schweppes® Limón on bond strength, adhesive remnant, and microleakage beneath brackets.
Tópico(s): Dental Anxiety and Anesthesia Techniques
2010 - Oxford University Press | European Journal of Orthodontics
D. Felgueroso, R. Vijande, J.M. Cuetos, R. Tucho, A. Hernández,
A frequently used deposition method for alloys with a high Ni content is plasma spraying (Ni-PS). However, this technique produces highly porous, uneven coatings with no homogeneity and poor adherence. Laser melting is now used to correct these defects, since it homogenizes and densifies the coating and also increases adherence to the substrate. However, complete melting of the whole surface of a coating generates great heat, which in turn often leads to cracking. Another drawback of complete melting ...
Tópico(s): Metal and Thin Film Mechanics
2007 - Elsevier BV | Wear
Rony Emmenegger, Sibilo Keno, Tobias Hagmann,
... Post-2005 Interlude," 443. 35. Kumera Kumera Kanea Tucho . "Decentralized Governance and Service Delivery: A Case Study ...
Tópico(s): African Studies and Ethnography
2011 - Taylor & Francis | Journal of Eastern African Studies
Bjørnar Arstad, Hilde J. Venvik, Hallgeir Klette, John C. Walmsley, Wakshum Mekonnen Tucho, Randi Holmestad, Anders Holmen, Rune Bredesen,
Water-gas shift (WGS) and methanol steam reforming (MSR) were performed in a catalytic membrane reactor configuration using self-supported Pd/23 wt.% Ag membranes of 1.6 μm thickness. A commercial Cu/ZnO/support catalyst was used. Effects on hydrogen permeation and membrane stability were investigated under the application of relevant conditions. The membranes were studied with X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) before and after usage to characterize the ...
Tópico(s): Membrane Separation and Gas Transport
2006 - Elsevier BV | Catalysis Today
J.E. Fernández, Yinglong Wang, R. Tucho, M.A. Martı́n-Luengo, R. Gancedo, A. Rincón,
Tópico(s): Tribology and Wear Analysis
1996 - Elsevier BV | Tribology International
Gudina Terefe Tucho, Peter D.M. Weesie, Sanderine Nonhebel,
This study aims to determine the contribution of renewable energy to large scale and standalone application in Ethiopia. The assessment starts by determining the present energy system and the available potentials. Subsequently, the contribution of the available potentials for large scale and standalone applications are determined taking into account the present energy system. The present energy system shows a large variation between urban and rural consumption. Almost all rural households depend ...
Tópico(s): Integrated Energy Systems Optimization
2014 - Elsevier BV | Renewable and Sustainable Energy Reviews
Ayantu Tucho, Fikre Lemessa, Gezahegn Berecha,
Tópico(s): African Botany and Ecology Studies
2014 - The Korean Society of Plant Pathology | Plant Pathology Journal
J.E. Fernández, R. Vijande, R. Tucho, J. Rodrı́guez, Ángel Luis Martín López,
Hard alloys are normally used as materials for excavators teeth in mining industry. In most cases these alloys do not have enough anti-wear properties and coatings are employed as a good alternative. The objective of this work is to test the abrasive wear resistance of several cast irons alloyed with different elements. Laboratory tests based on the ASTM G105-89 standard were compared to tests carried out under real working conditions of excavator teeth in mines. The experimental results show an ...
Tópico(s): Advanced Machining and Optimization Techniques
2001 - Elsevier BV | Wear
Gudina Terefe Tucho, Sanderine Nonhebel,
Up to the present day, wood has been used to supply the needs for cooking in rural Africa. Due to the ongoing deforestation, households need to change to other energy sources. To cover this need, a large amount of people are using residues from agriculture (straw, manure) instead. However, both straw and manure also have a function in agriculture for soil improvement. Using all the straw and manure will seriously affect the food production. In this paper we first determine the amount of energy that ...
Tópico(s): Municipal Solid Waste Management
2015 - Multidisciplinary Digital Publishing Institute | Energies
Gudina Terefe Tucho, Henri C. Moll, Anton Schoot Uiterkamp, Sanderine Nonhebel,
Most households in rural developing countries depend on firewood from public forests or agricultural bio-wastes for cooking. Public forests, though, are declining due to an increasing population and inefficient use of wood. Use of agricultural wastes on the other hand involves loss of soil nutrients since these resources are used as a substitute for inorganic fertilizers. Biogas energy can be an alternative in providing clean energy for cooking as well as improving soil fertility with the slurry. ...
Tópico(s): Anaerobic Digestion and Biogas Production
2016 - Multidisciplinary Digital Publishing Institute | Energies
Gudina Terefe Tucho, Sanderine Nonhebel,
Most households in rural developing countries do not have access to modern energy supply. Household level biogas energy was considered as an option but failed due to lack of sufficient resources for its installation and operation. A community energy system can be an option, but most studies focused on off-grid electricity. This energy system cannot be a realistic option particularly for cooking demand. An efficient and suitable system matching local resources and demand expectation needs to be developed ...
Tópico(s): Water-Energy-Food Nexus Studies
2017 - Springer Nature | Energy Sustainability and Society
Gutema Taressa Tura, Wondwossen Birke Eshete, Gudina Terefe Tucho,
Proper hand hygiene with soap and detergents prevents the transmission of many infectious diseases. However, commercial detergents are less likely to be accessible or affordable to poor people in remote rural areas. These people traditionally use some plant parts as a detergent even though their antibacterial activity has not been yet investigated. Therefore, this study aims to determine the antibacterial activities of some of the plants against bacteria isolated from humans. Plants selected for ...
Tópico(s): Child Nutrition and Water Access
2017 - BioMed Central | Antimicrobial Resistance and Infection Control
Wakshum Mekonnen Tucho, Priscille Cuvillier, Atle Sjolyst-Kverneland, V. Hansen,
The microstructure of Additive Manufactured (AM) Inconel 718 in general and Selective Laser Melting (SLM), in particular is different from the material produced by conventional methods due to the rapid solidification process associated with the former. As a result, the widely adapted standard solution heat treatment temperature (<1100 °C) for conventional material is found to be not high enough for materials fabricated with SLM method in order to dissolve Laves and other microsegregated phases for releasing ...
Tópico(s): High Entropy Alloys Studies
2017 - Elsevier BV | Materials Science and Engineering A
Dori Yosef Kalai, Kristian Stangeland, Yiying Jin, Wakshum Mekonnen Tucho, Zhixin Yu,
Biogas plays a key role in the emerging renewable energy market, and biogas utilization attracts increasing attention in the renewable energy industry. As biogas consists mainly of CH4 and CO2, one of the most suitable processes for its utilization is through dry reforming of methane (DRM) for synthesis gas (syngas) production. In this study, we demonstrate the feasibility of direct biogas reforming for syngas production over promoted hydrotalcite-derived (HT) Ni catalysts. A series of 20Ni-Mg-Al HT- ...
Tópico(s): Carbon dioxide utilization in catalysis
2018 - Elsevier BV | International Journal of Hydrogen Energy
Wakshum Mekonnen Tucho, V. Hansen,
Tópico(s): High Entropy Alloys Studies
2018 - Springer Science+Business Media | Journal of Materials Science
Wakshum Mekonnen Tucho, Vidar Hellandsjø Lysne, Håkon Austbø, Atle Sjolyst-Kverneland, V. Hansen,
Porosity is one of the major defects threatening mechanical properties in parts manufactured with Selected Laser Melting (SLM) method. Optimizing densification of materials is thus a key target of SLM as well as other similar methods to achieve the desired properties as per applications. In this study, porosity levels in Stainless Steel (SS) 316L parts manufactured with SLM were studied in relation to the effects of process parameters on microstructure and material hardness. Materials studied were ...
Tópico(s): Welding Techniques and Residual Stresses
2018 - Elsevier BV | Journal of Alloys and Compounds
Ayenew Addisu, Wim Adriaensen, Balew Arega, Mekuria Asnakew Asfaw, Ermias Diro, Amadou Garba, Desalegn Gebree, Getahun Seid, Begashaw Hailemariam, Anthony Harries, Abera Hirpa Adugna, Zeleke Ayalew Jejaw, Edward Mberu Kamau, Tigist Kelbo, Marcel Manzi, Dana Medebo Daniel, Ashok Moloo, Piero Olliaro, Philip Owiti, John C. Reeder, Mbazi Senkoro, Kuda Takarinda, Robert Terry, Collins Timire, Samson Tucho, Hannock Tweya, Wendemagegn Enbiale, Kristien Verdonck, Florian Vogt, Saskia van Henten, Johan van Griensven, Worku Bekele, María Zolfo, Rony Zachariah,
► The international community has pledged through the Sustainable Development Goals to eliminate neglected tropical diseases by 2030.► Authors from 19 institutions around the world call for urgent reflection and a change in mind-set to garner support and hasten progress towards achieving this fast approaching target.► They advocate for an empowering approach that will propel political momentum, milestones and targets for accountability, new science in drug development and increased funding particularly ...
Tópico(s): Parasite Biology and Host Interactions
2019 - BMJ | BMJ Global Health
Dori Yosef Kalai, Kristian Stangeland, Wakshum Mekonnen Tucho, Yiying Jin, Zhixin Yu,
Due to the expected large growth of biogas production, particularly in Europe, biogas utilization technology could play an important role in the near future. Direct biogas reforming through dry reforming of methane (DRM) has great potential as an intermediate step in biogas upgrading to fuels and commodity chemicals. In this work, a series of Ce-promoted Ni-Mg-Al hydrotalcite (HT) derived catalysts with different Ni loadings was prepared to study their applicability for model biogas reforming at low ...
Tópico(s): Carbon dioxide utilization in catalysis
2019 - Elsevier BV | Journal of CO2 Utilization
Thomas Ayalew Abebe, Gudina Terefe Tucho,
Abstract Background Recent studies have shown an increase in open defecation and slippage of open defecation-free certified villages in Ethiopia, despite significant progress the country made on sanitation programs. Hence, realizing of existing facts, this study was conducted aiming at a critical review of available literature and to provide consolidated data showing the level of slippage and its associated factors in Ethiopia. Methods Systematic literature searches were performed from four international ...
Tópico(s): Poverty, Education, and Child Welfare
2020 - BioMed Central | Systematic Reviews
Yonas Tesfaye, Liyew Agenagnew, Gudina Terefe Tucho, Susan Anand, Zewdie Birhanu, Gutema Ahmed, Masrie Getenet, Kiddus Yitbarek,
Community attitude towards mental health problems and help-seeking behavior plays a major role in designing effective community based mental health interventions. This study aimed to assess the attitude, help-seeking behavior, and associated factors of the Jimma zone community towards mental health and mental health problems.
Tópico(s): Family Caregiving in Mental Illness
2020 - Public Library of Science | PLoS ONE
Marius Aga Belsvik, Wakshum Mekonnen Tucho, V. Hansen,
Tópico(s): Additive Manufacturing and 3D Printing Technologies
2020 - Springer Nature | SN Applied Sciences
Gudina Terefe Tucho, Diribe Makonene Kumsa,
Sustainable development goal 7 (SDG 7) focuses on ensuring access to affordable, reliable, sustainable, and modern energy for all by 2030. This goal has a lot of synergies and associations with the rest of SDGs and in particular to goals 1,3,4,5 and 15. Nevertheless, achieving this goal with the provisions of access to affordable and sustainable modern cooking energy will be very challenging when past failed programs are considered. The challenges could be paramount in Sub-Saharan Africa, where still ...
Tópico(s): Photovoltaic Systems and Sustainability
2020 - Frontiers Media | Frontiers in Energy Research