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Search Results: 1 - 10 of 212 matches for " Justice Kwame Appati "
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Performance Analysis of Image Smoothing Techniques on a New Fractional Convolution Mask for Image Edge Detection  [PDF]
Peter Amoako-Yirenkyi, Justice Kwame Appati, Isaac Kwame Dontwi
Open Journal of Applied Sciences (OJAppS) , 2016, DOI: 10.4236/ojapps.2016.67048
Abstract: We present the analysis of three independent and most widely used image smoothing techniques on a new fractional based convolution edge detector originally constructed by same authors for image edge analysis. The implementation was done using only Gaussian function as its smoothing function based on predefined assumptions and therefore did not scale well for some types of edges and noise. The experiments conducted on this mask using known images with realistic geometry suggested the need for image smoothing adaptation to obtain a more optimal performance. In this paper, we use the structural similarity index measure and show that the adaptation technique for choosing smoothing function has significant advantages over a single function implementation. The new adaptive fractional based convolution mask can smoothly find edges of various types in detail quite significantly. The method can now trap both local discontinuities in intensity and its derivatives as well as locating Dirac edges.
Las tecnologías multimedia y reforma educativa en áfrica: el caso de Ghana Making the Introduction of Multi-media Technologies Count in Education Reform in Africa: the Case of Ghana
Kwame Akyeampong
Comunicar , 2009, DOI: doi:10.3916/c32-2009-02-009
Abstract: La presente contribución da un repaso a la introducción de las tecnologías antiguas y nuevas de la información en el sector educativo de Ghana. Se ala cómo la reciente proliferación de las tecnologías mul timedia en el país ha alentado finalmente la introducción de las TIC en la educación. Sin embargo, el autor sostiene que buena parte de la motivación para introducir estas nuevas tecnologías en los centros educativos e institutos superiores no ha reflejado la necesidad de reconceptualizar las prácticas curriculares en la formación docente, con el fin de fundamentarlas en ideas constructivistas sobre los conocimientos y su producción. Sin esto, las reformas para introducir las nuevas tecnologías de información y comunicación en las aulas corren el riesgo de ser meramente herramientas que nuevamente se utilizan para reforzar las viejas tradiciones de ense anza y aprendizaje en base a la trasmisión de los conocimientos sin ningún pensamiento crítico. Finalmente, el autor insiste en que los cambios curriculares en la formación docente en Ghana, y en otras partes de áfrica, también deben reflejar las nuevas identidades de aprendizaje profesional y experiencias de aprendizaje que deben fomentar las TIC y otras herramientas mediáticas en el aula. This contribution reviews the introduction of old and new information communication technologies in Ghanaian education. It points out how the recent proliferation of multi-media technologies in the country has ultimately encouraged the introduction of ICTs in education. However, the author argues that much of the move to introduce these new technologies into schools and colleges has not reflected the need to re-conceptualise teacher education curriculum practices to base its foundations on constructivist ideas about knowledge and its production. Without this, reforms to introduce new information communication technologies in classrooms risk becoming tools that are again used to reinforce old traditions of teaching and learning based on uncritical transmission of knowledge. Finally, the author argues that changes to the teacher education curriculum in Ghana, and elsewhere in Africa, should also reflect the new professional learning identities and learning experiences that ICT and other media communication tools are meant to foster in the classroom.
Life Expectancy as Indicator of Health Status: The Case of Edmonton and Calgary
Kwame Boadu
Canadian Studies in Population , 1999,
The Effect of Contraceptive Practice on Fertility in Ghana: A Decade of Experience
Boadu, Kwame
Canadian Studies in Population , 2002,
Abstract: English This study examines some factors that influence fertility behaviour in Ghana,with particular emphasis on the influence of contraception as an intermediate variable. The decadeexamined covers the period 1988 to 1998 and the factors analyzed are age, residence, education,religion and ethnicity. Employing multivariate regression analysis and path models, the study observesthat among all the factors, age is the only variable that has a moderate effect on fertility. Also ofsignificant interest is that the positive influence of contraceptive use on fertility in 1988 isreversed in 1998. The study notes that given the non-significant effects obtained save the moderateeffect of age, it is not possible to draw a definitive conclusion regarding the impact that any ofthese factors might have contributed to the observed reduction in fertility during the period. Inlight of this, the study recommends that more effort would be required if fertility is to be reducedsubstantially. Nonetheless, the reversal in the effect of contraceptive use between the two periods isseen as encouraging. French Cette étude porte sur certains facteurs qui ont une incidence sur le comportement procréateur au Ghana. Une attention particulière a été accordée à l'influence de la contraception en tant que variable intermédiaire. L'étude porte sur la période allant de 1988 à 1998 et sur les facteurs tels que l'age, le lieu de résidence, l'éducation, la religion et l'ethnicité. Basée sur l'analyse de régression multidimensionnelle et des modèles causaux, l'étude fait remarquer que de tous les facteurs, l'age est la seule variable présente une conséquence modérée sur la fertilité. Il est également intéressant de noter que l'influence positive de la contraception en 1988 a été renversée en 1998. Les auteurs de l'étude soulignent que compte tenu des résultats peu importants obtenus, hormis l'effet modéré de l'age, il est impossible de tirer une conclusion définitive en ce qui concerne l'impact de ces facteurs sur la réduction de la fertilité observée pendant cette période. Compte tenu de cela, les auteurs recommandent une hausse des mesures si l'on veut réduire la fertilité considérablement. Quoi qu'il en soit le revirement des conséquences des pratiques contraceptives pendant les deux périodes est considéré comme encourageant.
Separating True V0's from Combinatoric Background with a Neural Network
Marvin Justice
Physics , 1996, DOI: 10.1016/S0168-9002(97)00995-9
Abstract: A feedforward multilayered neural network has been trained to "recognize" true V0's in the presence of a large combinatoric background using simulated data for 2 GeV/nucleon Ni + Cu interactions. The resulting neural network filter has been applied to actual data from the EOS TPC experiment. An enhancement of signal to background over more traditional selection mechanisms has been observed.
Dynamic Systems of Shifts in the Space of Piece-Wise Continuous Functions  [PDF]
Isaac Kwame Dontwi, William Obeng-Denteh
Advances in Pure Mathematics (APM) , 2012, DOI: 10.4236/apm.2012.26067
Abstract: In this paper we embark on the study of Dynamic Systems of Shifts in the space of piece-wise continuous functions analogue to the known Bebutov system. We give a formal definition of a topological dynamic system in the space of piece-wise continuous functions and show, by way of an example, stability in the sense of Poisson discontinuous function. We prove that a fixed discontinuous function, f, is discontinuous for all its shifts, whereas the trajectory of discontinuous function is not a compact set.
Life Satisfaction among Elderly Households in Public Rental Housing in Singapore  [PDF]
Kwame Addae-Dapaah, Quah Shu Juan
Health (Health) , 2014, DOI: 10.4236/health.2014.610132
Abstract: We set out to investigate how satisfied the poor elderly Singaporean households in social housing are with their lives, especially in relation to their housing, in an attempt to find measures to improve, where possible, the life satisfaction of this group of elderly Singaporeans. We use archival and empirical research for our investigation. The results from 403 respondents to our survey are analyzed through logistic regression and factor analysis. We find that the life satisfaction of the elderly residents of social housing is very low. Furthermore we find that home modification that meets the requirements of the respondents will substantially improve their life satisfaction. Given that these elderly households neither have the right nor financial means to modify their housing units and precincts, it is incumbent upon the government, through the relevant authorities such as HDB, Town Councils and BCA to effect the necessary home modifications to create a more elderly-friendly physical environment to improve the life satisfaction of the elderly households in social housing in Singapore. This arguably is a social imperative which should not be subjugated to economic niceties as social housing is not a luxurious housing choice but the last safety net for basic shelter.

The Effects of Race and Space on City-County Consolidation: The Albany-Dougherty Georgia Experience  [PDF]
Kwame Boakye Dankwa, Timothy Sweet-Holp
Current Urban Studies (CUS) , 2015, DOI: 10.4236/cus.2015.33021
Abstract: In this paper the authors summarize the history of government consolidation successes and failures in Georgia, discuss regionalism and functional consolidation, and address social-structural barriers to unified government. The paper focuses on the 60-year consolidation movement and current unification efforts in Albany-Dougherty County, GA. Since knowing citizen perceptions is vital in understanding the resistance to consolidation, the paper concludes with findings from a 2012 Exit Poll in Dougherty County, GA.
Major Determinants of Prices Increase of Building Materials on Ghanaian Construction Market  [PDF]
Humphrey Danso, Nana Kwame Obeng-Ahenkora
Open Journal of Civil Engineering (OJCE) , 2018, DOI: 10.4236/ojce.2018.82012
Abstract: Prices increase of building materials is a common trend in both developed and developing countries. The prices increase of building materials results in high cost of housing.The aim of this study is to identify the major determinants of prices increase of building materials on Ghanaian construction market, and also to assess the relationship between the independent variables of the prices increase. A five-point Likert scale was used for the study; from strongly disagree (1) to strongly agree (5). The variables in the questionnaire were ranked based on the response of the participants of the study using Mean Response Analysis (MRA) statistics. Spearman correlation matrix was used to determine the relationship between the variables of prices increase of building materials. Crude oil prices, energy cost, local taxes and charges, cost of fuel and power supply, high running cost, high prices of raw materials, cost of transportation and the high cost of labour were found to be the major determinants of prices increase of building materials on Ghanaian construction market. The study further found multicollinearity relationship among variables of prices increase of building materials, of which the highest correlation coefficient was found between fast-growing demand due to high global economic growth and over-dependence on imported building materials. The study recommends that further research should be carried out to determine the control measures of increase prices of building materials in Ghana.
Steeping of Whole Dried Maize Seeds in Buffers Altered Fatty Acid Ionization State, Composition, and Lipase Activity  [PDF]
Raphael Lartey Abban, Justice Kwabena Sarfo
Food and Nutrition Sciences (FNS) , 2017, DOI: 10.4236/fns.2017.811071
Steeping is a simple model of studying the activation and modulation of the physiological pathways involved in seed germination. In this study, steeping of grains of the ‘obatanpa’ maize variety in buffers at different pH was monitored through the measurements of lipase activity, oil yield, fatty acid component and unsaturation, and germination capacity. Lipase activity of grains steeped for four days decreased in the order: pH 3 > pH 5 > pH 7 > pH 9 > pH 11. Decreasing lipase activity was corroborated with decreasing free fatty acid components, protein concentrations and oil yields. The unsaturation components of the oil fractions only marginally increased with increasing steeping media pH. Three major components were detected by TLC in all oil fractions. The unique components were confirmed by their uniform UV-absorption spectra converging at an isosbestic point of 290 nm. Germination capacity was much reduced for seeds steeped in buffered media for 24 hours compared with seeds steeped in portable water though the pattern of germination, which was monitored for five days, did not change. This study has demonstrated the use of pH changes of steeping medium to modulate physicochemical properties and germination of seeds. The physicochemical changes were observed after seeds have been submerged under steeping buffer for four days. Practical application: With proliferation of specialty maize hybrids, the study provides an insight into the development of experimental protocols for the selection of types of maize grain for preparation of foods and beverages in terms of general characterization and lipolytic activity, which have implications for flavor, taste and odor of the final products. The imminence of this in some traditional ways of preparing malted and fermented maize foods and beverages, which go through days of steeping, cannot be overemphasized. This study therefore provides another dimension to the manipulation of the steeping stage to develop varieties of maize-based product.
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