Search Results

Partnership for Enhancing Developing Countries' Capacity in Participating in Global Knowledge Production and Use

Description: Poster discussing a partnership for enhancing developing countries' capacity in participating in global knowledge production and use. This poster highlights some of the contributing factors that enhance the capacity of African institutions to play active roles in the current global knowledge economy (in terms of information and knowledge creation, access, use and reuse).
Date: July 2013
Creator: Alemneh, Daniel Gelaw; Assefa, Shimelis & Rorissa, Abebe
Partner: UNT Libraries

Missionary Millennium: The American West; North and West Africa in the Christian Imagination

Description: During the 1890s in the United States, Midwestern YMCA missionaries challenged the nexus of power between Northeastern Protestant denominations, industrialists, politicians, and the Association's International Committee. Under Kansas YMCA secretary George Fisher, this movement shook the Northeastern alliance's underpinnings, eventually establishing the Gospel Missionary Union. The YMCA and the GMU mutually defined foreign and domestic missionary work discursively. Whereas Fisher's pre-millennial movement promoted world conversion generally, the YMCA primarily reached out to college students in the United States and abroad. Moreover, the GMU challenged social and gender roles among Moroccan Berbers. Fisher's movements have not been historically analyzed since 1975. Missionary Millennium is a reanalysis and critical reading of religious fictions about GMU missionaries, following the organization to its current incarnation as Avant Ministries.
Date: August 2009
Creator: Garrett, Bryan A.
Partner: UNT Libraries

Oral Literature in Africa

Description: This revised edition makes Finnegan’s ground-breaking research available to the next generation of scholars. It includes a new introduction, additional images and an updated bibliography, as well as its original chapters on poetry, prose, "drum language” and drama, and an overview of the social, linguistic and historical background of oral literature in Africa. This volume is complemented by original recordings of stories and songs from the Limba country (Sierra Leone), collected by Finnegan during her fieldwork in the late 1960s,
Date: 2012
Creator: Finnegan, Ruth H.
Partner: UNT Libraries

Land-Use and Land-Cover Change (LUCC): Implementation Strategy

Description: The Implementation Strategy of the Land-Use and Land-Cover Change (LUCC) project specifies in greater detail the activities and projects that will fulfil the mandate outlined in the LUCC Science/Research Plan published in 1995. The project, a joint initiative of IGBP and IHDP, is addressing important global change questions on the local, regional and global scale. The planned and ongoing activities involve a wide community of natural and social scientists. The new understanding of land-use and land-cover change dynamics following from the work carried out under the LUCC Implementation Strategy will be of crucial importance to the global environmental change research community as well as to decision-makers at the local, regional and global levels.
Date: 1999
Creator: Scientific Steering Committee and International Project Office of LUCC
Partner: UNT Libraries

Ensuring Universal Access for the Global Information Flow: Responding to the Demands of Scholarship in the Digital Age

Description: This presentation was presented in Session 6.4 Reports of Current Research (Juried Papers), at the 2005 ALISE Conference. It summarizes current situations and developing trends in information technologies. Africa is used as a case to illustrate how local policies have played important roles in the process of information globalization.
Date: 2005
Creator: Alemneh, Daniel Gelaw & Hastings, Samantha Kelly
Partner: UNT Libraries

Scientific Measure of Africa's Connectivity

Description: Data on Internet performance and the analysis of its trend can be useful for decision makers and scientists alike. Such performance measurements are possible using the PingER methodology. We use the data thus obtained to quantify the difference in performance between developed and developing countries, sometimes referred to as the Digital Divide. Motivated by the recent interest of G8 countries in African development, we particularly focus on the African countries.
Date: April 24, 2006
Creator: Zennaro, M.; Canessa, E.; Sreenivasan, K.R.; /ICTP, Trieste; Rehmatullah, A.A.; Cottrell, R.L. et al.
Partner: UNT Libraries Government Documents Department

Technical Potential of Solar Energy to Address Energy Poverty and Avoid GHG Emissions in Africa (Poster)

Description: Approximately 1.6 billion people worldwide do not have access to electricity, and roughly 2.4 billion people rely on traditional biomass fuels to meet their heating and cooking needs. Lack of access to and use of energy - or energy poverty - has been recognized as a barrier to reaching the Millennium Development Goals (MDGs) and other targeted efforts to improve health and quality of life. Reducing reliance on traditional biomass can substantially reduce indoor air pollution-related morbidity and mortality; increasing access to lighting and refrigeration can improve educational and economic opportunities. Though targeted electrification efforts have had success within Latin America and East Asia (reaching electrification rates above 85%), sub-Saharan Africa has maintained electrification rates below 25% (IEA 2004).
Date: October 1, 2008
Creator: Cowlin, S.; Heimiller, D.; Bilello, D. & Renne, D.
Partner: UNT Libraries Government Documents Department

A Top to Bottom Lithospheric Study of Africa and Arabia

Description: We study the lithospheric structure of Africa, Arabia and adjacent oceanic regions with fundamental-mode surface waves over a wide period range. Including short period group velocities allows us to examine shallower features than previous studies of the whole continent. In the process, we have developed a crustal thickness map of Africa. Main features include crustal thickness increases under the West African, Congo, and Kalahari cratons. We find crustal thinning under Mesozoic and Cenozoic rifts, including the Benue Trough, Red Sea, and East, Central, and West African rift systems. Crustal shear wave velocities are generally faster in oceanic regions and cratons, and slower in more recent crust and in active and formerly active orogenic regions. Deeper structure, related to the thickness of cratons and modern rifting, is generally consistent with previous work. Under cratons we find thick lithosphere and fast upper mantle velocities, while under rifts we find thinned lithosphere and slower upper mantle velocities. There are no consistent effects in areas classified as hotspots, indicating that there seem to be numerous origins for these features. Finally, it appears that the African Superswell has had a significantly different impact in the north and the south, indicating specifics of the feature (temperature, time of influence, etc.) to be dissimilar between the two regions. Factoring in other information, it is likely that the southern portion has been active in the past, but that shallow activity is currently limited to the northern portion of the superswell.
Date: October 31, 2006
Creator: Pasyanos, M
Partner: UNT Libraries Government Documents Department

Partitioned Waveform Inversion Applied to Eurasia and Northern Africa

Description: This report summarizes the data analysis achieved during Heather Bedle's eleven-week Technical Scholar internship at Lawrence Livermore National Labs during the early summer 2006. The work completed during this internship resulted in constraints on the crustal and upper mantle S-velocity structure in Northern Africa, the Mediterranean, the Middle East, and Europe, through the fitting of regional waveform data. This data extends current raypath coverage and will be included in a joint inversion along with data from surface wave group velocity measurements, S and P teleseismic arrival time data, and receiver function data to create an improved velocity model of the upper mantle in this region. The tectonic structure of the North African/Mediterranean/Europe/Middle Eastern study region is extremely heterogeneous. This region consists of, among others, stable cratons and platforms such as the West Africa Craton, and Baltica in Northern Europe; oceanic subduction zones throughout the Mediterranean Sea where the African and Eurasian plate collide; regions of continental collision as the Arabian Plate moves northward into the Turkish Plate; and rifting in the Red Sea, separating the Arabian and Nubian shields. With such diverse tectonic structures, many of the waveforms were difficult to fit. This is not unexpected as the waveforms are fit using an averaged structure. In many cases the raypaths encounter several tectonic features, complicating the waveform, and making it hard for the software to converge on a 1D average structure. Overall, the quality of the waveform data was average, with roughly 30% of the waveforms being discarded due to excessive noise that interfered with the frequency ranges of interest. An inversion for the 3D S-velocity structure of this region was also performed following the methodology of Partitioned Waveform Inversion (Nolet, 1990; Van der Lee and Nolet, 1997). The addition of the newly fit waveforms drastically extends the range of ...
Date: July 27, 2006
Creator: Bedle, H.; Matzel, E. & Flanagan, M.
Partner: UNT Libraries Government Documents Department

Product Quality Assurance for Off-Grid Lighting in Africa

Description: Although the emergence of markets for high efficiency off-grid lighting technologies holds promise, realizing the potential of this opportunity on a long-term, sustainable basis requires careful attention to issues of product quality, consumer protection, and the potential for significant 'market spoiling', in anticipation of increases of sales of low cost, low performance off-grid lighting products. The goal of the Lighting Africa quality assurance workshop was to articulate strategies to mitigate the dangers of market spoiling and to explore ways to protect consumers from misleading advertising for sales of inferior, off-grid lighting products in the context of Lighting Africa's overarching objective to support the industry in developing a robust off-grid lighting market in Africa. The workshop resulted in the identification of two strategic approaches for meeting Lighting Africa quality assurance programmatic needs. The first strategy is intended to meet a short-term programmatic need for quality associated with requests for lighting products by bulk procurement agents, such as in a World Bank-financed project. The development of procurement specifications and test procedures that could be used in a quality/usability screening method in order to provide guidance for forthcoming large volume purchases emerged as the best solution to meet this need. Such approaches are used in World Bank-financed solar home systems (SHSs) projects in Bangladesh, Sri Lanka, and China, among others. However, unlike the SHSs which have multiple balance-of-system (BOS) components warranting the need for an array of specifications for individual components, stand alone lighting systems require specifications that are amenable to individual light points. To test this approach, Lighting Africa elected to use the technical specifications issued by the Photovoltaic Global Approval Program for solar lanterns that use CFL bulbs (PVRS11A) as the basis of qualifying such products. A contract has been competitively awarded to the Global Approval Program for Photovoltaics (PV GAP) ...
Date: July 13, 2008
Creator: Bank, World; Mills, Evan & Mills, Evan
Partner: UNT Libraries Government Documents Department

General Paul Von Lettow-vorbeck’s East Africa Campaign: Maneuver Warfare on the Serengeti

Description: General Paul von Lettow-Vorbeck’s East African Campaign was a conventional war of movement. Lettow based his operations on the military principles deduced from his thorough German military education and oversea deployments to China and German South West Africa. Upon assignment to German East Africa, he sought to convert the colony’s protectorate force from a counterinsurgency force to a conventional military force. His conventional strategy succeeded early in the war, especially at the Battle of Tanga in October 1914. However, his strategy failed as the war in East Africa intensified. He suffered a calamitous defeat at the Battle of Mahiwa in November 1917, and the heavy losses forced Lettow to adopt the counterinsurgency tactics of the colonial protectorate force.
Date: May 2012
Creator: Nesselhuf, F. Jon
Partner: UNT Libraries

Witchcraft: a Targeted Societal Discrimination Against Women in Northern Ghana

Description: A combination of aging and poverty is becoming dominant in African society today, at a time when African countries are expected to be recovering from poverty, and are projected to house the economic growth of the next century. The emergence of aging in African context and the aging of the world population will expose the weakness of the current mechanisms used for older people around the world. As economies grow around the world, the distribution gap between the affluent and the poor widens, and the constant struggles for wealth, power, and social status, amidst scarce resources, continue to be sustained. To remain in charge of economic resources, the powerful few devise means to disenfranchise the weak, and witchcraft accusation is one of such tools used in Northern Ghana today. A new wave of witchcraft accusation has caught the attention of many in Northern Ghana. These victims with certain socioeconomic characteristics appear helpless and without defense against such accusations. As a result, they suffer untold hardships and are often compelled to leave their homes and to reside in camps reserved for witches. This study was undertaken to identify those sociodemographic characteristics, which are commonly shared by witchcraft accusation victims. These sociodemographic characteristics can be used to predict those who are most likely to be discriminated against using accusations of witchcraft in Northern Ghana. As age places more strain on existing systems and as more people survive into old age with inadequate healthcare, more accusations may be predicted to occur against the elderly, unless enough government intervention is used to address the present redistribution of income in third world countries.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: December 2013
Creator: Atumah, Oscar Nwagbo
Partner: UNT Libraries

The age of the martian meteorite Northwest Africa 1195 and the differentiation history of the shergottites

Description: Samarium-neodymium isotopic analyses of unleached and acid-leached mineral fractions from the recently identified olivine-bearing shergottite Northwest Africa 1195 yield a crystallization age of 348 {+-} 19 Ma and an {var_epsilon}{sub Nd}{sup 143} value of +40.1 {+-} 1.3. Maskelynite fractions do not lie on the Sm-Nd isochron and appear to contain a martian surface component with low {sup 147}Sm/{sup 144}Nd and {sup 143}Nd/{sup 144}Nd ratios that was added during shock. The Rb-Sr system is disturbed and does not yield an isochron. Terrestrial Sr appears to have affected all of the mineral fractions, although a maximum initial {sup 87}Sr/{sup 86}Sr ratio of 0.701614 {+-} 16 is estimated by passing a 348 Ma reference isochron through the maskelynite fraction that is least affected by contamination. The high initial {var_epsilon}{sub Nd}{sup 143} value and the low initial {sup 87}Sr/{sup 86}Sr ratio, combined with the geologically young crystallization age, indicate that Northwest Africa 1195 is derived from a source region characterized by a long-term incompatible element depletion. The age and initial Sr and Nd isotopic compositions of Northwest Africa 1195 are very similar to those of Queen Alexandra Range 94201, indicating these samples were derived from source regions with nearly identical Sr-Nd isotopic systematics. These similarities suggest that these two meteorites share a close petrogenetic relationship and might have been erupted from a common volcano. The meteorites Yamato 980459, Dar al Gani 476, Sayh al Uhaymir 005/008, and Dhofar 019 also have relatively old ages between 474-575 Ma and trace element and/or isotopic systematics that are indicative of derivation from incompatible-element-depleted sources. This suggests that the oldest group of meteorites is more closely related to one another than they are to the younger meteorites that are derived from less incompatible-element-depleted sources. Closed-system fractional crystallization of this suite of meteorites is modeled with the MELTS algorithm ...
Date: April 5, 2007
Creator: Symes, S; Borg, L; Shearer, C & Irving, A
Partner: UNT Libraries Government Documents Department

Combined Plate Motion and Density Driven Flow in the Asthenosphere beneath Saudi Arabia: Evidence from Shearwave Splitting and Seismic Anisotropy

Description: Mantle anisotropy along the Red Sea and across the Arabian Peninsula was analyzed using shear-wave splitting recorded by stations from three different seismic networks: the largest, most widely distributed array of stations examined across the Arabian Peninsula to date. Stations near the Gulf of Aqaba display fast orientations aligned parallel to the Dead Sea Transform Fault, most likely related to the strike-slip motion between Africa and Arabia However, most of our observations across Arabia are statistically the same (at a 95% confidence level), with north-south oriented fast directions and delay times averaging about 1.4 s. Since end-member models of fossilized anisotropy and present-day asthenospheric flow do not adequately explain these observations, we interpret them as a combination of plate and density driven flow in the asthenosphere. Combining northeast oriented flow associated with absolute plate motion with northwest oriented flow associated with the channelized Afar upwelling along the Red Sea produces a north-south resultant that matches the observations and supports models of active rifting.
Date: September 8, 2006
Creator: Hansen, S; Schwartz, S; Al-Amri, A & Rodgers, A
Partner: UNT Libraries Government Documents Department

Digital Divide in Sub-Saharan African Universities: Recommendations and Monitoring

Description: The Digital Divide prevents Africa from taking advantages of new information technologies. One of the most urgent priorities is to bring the Internet in African Universities, Research, and Learning Centers to the level of other regions of the world. eGY-Africa, and the Sharing Knowledge Foundation are two bottom-up initiatives by scientists to secure better cyber-infrastructure and Internet facilities in Africa. Recommendations by the present scientific communities are being formulated at national, regional and international levels. The Internet capabilities are well documented at country level overall, but this is not the case at the University level. The snapshot of the Internet status in universities in 17 African countries, obtained by a questionnaire survey, is consistent with measures of Internet penetration in the corresponding country. The monitoring of Internet performance has been proposed to those African universities to provide an information base for arguing the need to improve the coverage for Africa. A pilot program is recommended that will start scientific collaboration with Europe in western Africa using ICT. The program will lay the foundations for the arrival of new technologies like Grids.
Date: December 17, 2009
Creator: Barry, Boubakar; Univ., /Assoc. Afr.; Chukwuma, Victor; U., /Olabisi Onabanjo; Petitdidier, Monique; /CEPT, Velizy et al.
Partner: UNT Libraries Government Documents Department

Emergence of recombinant forms in geographic regions with co-circulating HIV subtypes in the dynamic HIV-1 epidemic

Description: We have reexamined the subtype designations of {approx}10,000 subtype A, B, C, G, and AG, BC, BF recombinant sequences, and compared the results of the new analysis with their published designations. Intersubtype recombinants dominate HIV epidemics in three different geographical regions. The circulating recombinant from (CRF) CRF02-AG, common in West Central Africa, appears to result from a recombination event that occurred early in the divergence between subtypes A and G, although additional more recent recombination events may have contributed to the breakpoint pattern in this recombinant lineage as well. The Chinese recombinant epidemic strains CRF07 and CRF08, in contrast, result from recent recombinations between more contemporary strains. Nevertheless, CRF07 and CRF08 contributed to many subsequent recombination events. The BF recombinant epidemics in two HIV-1 epicenters in South America are not independent and BF epidemics in South America have an unusually high fraction of unique recombinant forms (URFs) that have each been found only once and carry distinctive breakpoints. Taken together, these analyses reveal a complex and dynamic picture of the current HIV-1 epidemic, and suggest a means of grouping and tracking relationships between viruses through preservation of shared breakpints.
Date: January 1, 2009
Creator: Zhang, Ming; Letiner, Thomas K; Korber, Bette T & Foley, Brian
Partner: UNT Libraries Government Documents Department

Model National Implementing Legislation for the Chemical Weapons Convention

Description: It is an honor to address this distinguished audience. We are grateful to the Republique Gabonaise for hosting this important gathering and to the staff of the Organization for the Prohibition of Chemical Weapons (OPCW) for supporting it. This seminar is another excellent opportunity for all of us to learn from each other about how the Chemical Weapons Convention (CWC) can become a foundation of arms control in Africa and around the world. At this meeting we speak only for ourselves, neither for the government of the United States of America nor for any other institution. This paper discusses model national implementing legislation under the CWC. Every State Party likely must enact implementing legislation - not only the few States Parties that will declare and destroy chemical weapons, but also the many States Parties that have never had a chemical weapons programme.
Date: December 31, 1997
Creator: Tanzman, E.A. & Kellman, B.
Partner: UNT Libraries Government Documents Department

Preliminary definition of geophysical regions for the Middle East and North Africa

Description: The ability to calibrate seismic stations to improve the monitoring of the Comprehensive Test Ban Treaty is partially limited by the availability of seismic events with known locations and source properties. To confidently extrapolate from these events to aseismic regions, and to properly account for discontinuities in seismic properties requires accurate geophysical models. This paper lays out a preliminary, first-order, regionalization of the Middle East and North African (MENA) region. The model specifies boundaries and velocity structures based on the geology and tectonics of the region, previously published studies, and empirical data observations by the LLNL group. This model is a starting point and is expected to be improved and refined by comparisons with ongoing tomography efforts and the collection of new data. We anticipate that this model and its successors will prove useful as a background model in the process of forming station calibration maps based on intelligent interpolation techniques such as kriging. We also hope the model, as it improves and demonstrates some predictive power, will provide a reference model for broader CTBT research efforts in detection, location and discrimination as well as other aspects of earth science.
Date: December 1998
Creator: Sweeney, J. J. & Walter, B.
Partner: UNT Libraries Government Documents Department

Preliminary maps of crustal thickness and regional seismic phases for the Middle East and North Africa

Description: As part of the development of regional seismic discrimination methods for the Middle East and North Africa (MENA) the author is building a database of information related to seismic propagation and crustal structure as well as associated geologic-tectonic and geophysical data. He hopes to use these data to construct and test models of regional seismic propagation and evaluate various detection/discrimination scenarios. To date, the database has been developed by building on a list of references for MENA provided by the Institute for the Study of the Continents (INSTOC) at Cornell University. To this list the author has added an equal number of references resulting from his own literature search which has emphasized papers dealing with seismicity and regional and teleseismic phase data. This paper represents an initial attempt to consolidate some of the information from the database into a form useful to researchers modeling regional seismic waveforms. The information compiled in this report is supplemental to the INSTOC database and has not been compiled anywhere else. What follows is a series of maps which illustrate the spatial variation of seismic phase velocities and crustal thickness. The text identifies the sources of information used in the map preparation. Data for the compilation of these maps has come from an initial search of the database as it presently exists and is not intended to be exhaustive. The author hopes that this initial exercise will help to identify areas and types of data that are deficient and help to focus future data gathering activities.
Date: September 6, 1995
Creator: Sweeney, J.J.
Partner: UNT Libraries Government Documents Department

Status report of propagation models: Middle East and North Africa (S5.3)

Description: An improved understanding of the influence that tectonic structure has on regional seismic phases is needed to improve the current performance of regional discriminants and their transportability to the Middle East and North Africa. In the case that the crustal structure can be approximated by a flat layered laterally invariant medium, layer-cake reflectivity modeling can be used to obtain an accurate representation of regional phases. However, a laterally heterogeneous crust is just as common as a layered cake structure and in this case large variations in regional phase amplitudes are not uncommon. For instance, it has been shown that rough surface topography and undulations in the Moho can cause the transfer of energy between various surface wave modes and between surface waves and body waves greatly increasing the potential variability of seismic phases. Larger scale structure such as thickening or thinning of the crust can also greatly affect phase propagation. In some instances, changes between different tectonic regions such as that which occurs at a continental-oceanic boundary can completely block phases such as Lg rendering certain discriminants useless. In addition to structure along the path, lateral structure and free surface topography near the source and receiver can cause complex scattering effects with strong directional, frequency, and near-field effects. Given that the Middle East and North Africa cross many different tectonic boundaries, the authors are using numerical propagation models to understand how the relevant tectonic features affect the propagation of primary discriminant phases.
Date: November 1, 1995
Creator: Schultz, C.A.; Patton, H.J. & Goldstein, P.
Partner: UNT Libraries Government Documents Department

Seismic discrimination between earthquakes and explosions in the Middle East and North Africa

Description: The recently signed Comprehensive Test Ban Treaty provides for an international network of primary and auxiliary seismic monitoring stations (IMS) to verify its compliance. Calibration is required to confidently use these stations to identify and discriminate between earthquakes, mine-related events and clandestine nuclear explosions, particularly for small to moderate seismic events recorded regionally at only a few stations. Given the lack of regional recordings of underground nuclear tests in most of the world, we are making use of mining and industrial explosions to test discriminants. For example we use the Multimax compiled dataset of small earthquakes and quarry explosions in Israel to test regional discriminants at local distances with mixed results. Further complicating calibration is the fact that many INK sites have not yet been installed and others have very short operating histories. When IMS data is available, there is often a lack of independent information (ground truth ) on the seismic sources. Here we describe a procedure for calibrating stations with limited data and apply it to the IMS auxiliary station MDT in Morocco. Data was initially available for three months in 1990 when MDT was operated as part of MEDNET. An event detector was run over the continuous data and regional events identified and roughly located using S-P time and back azimuth. The procedure uses spatial and temporal clustering to identify ''known'' mine blasts. The spatial clustering is done using the waveform correlation technique of Harris (1991) to find events with similar sources and locations. Temporal clustering looks at the time of day and repetition in time of events with the mine blasts occurring during working hours and days repeatedly over a period of time. A set of ''known'' earthquakes is also determined using location, time of day, distribution in time and size criteria. With these independent libraries ...
Date: July 1, 1997
Creator: Walter, W.R.; Harris, D.B. & Myers, S.C.
Partner: UNT Libraries Government Documents Department