Shuttle payload bay dynamic environments: Summary and conclusion report for STS flights 1-5 and 9

The vibration, acoustic and low frequency loads data from the first 5 shuttle flights are presented. The engineering analysis of that data is also presented. Vibroacoustic data from STS-9 are also presented because they represent the only data taken on a large payload. Payload dynamic environment predictions developed by the participation of various NASA and industrial centers are presented along with a comparison of analytical loads methodology predictions with flight data, including a brief description of the methodologies employed in developing those predictions for payloads. The review of prediction methodologies illustrates how different centers have approached the problems of developing shuttle dynamic environmental predictions and criteria. Ongoing research activities related to the shuttle dynamic environments are also described. Analytical software recently developed for the prediction of payload acoustic and vibration environments are also described

Edge Detection: A Collection of Pixel based Approach for Colored Images

The existing traditional edge detection algorithms process a single pixel on an image at a time, thereby calculating a value which shows the edge magnitude of the pixel and the edge orientation. Most of these existing algorithms convert the coloured images into gray scale before detection of edges. However, this process leads to inaccurate precision of recognized edges, thus producing false and broken edges in the image. This paper presents a profile modelling scheme for collection of pixels based on the step and ramp edges, with a view to reducing the false and broken edges present in the image. The collection of pixel scheme generated is used with the Vector Order Statistics to reduce the imprecision of recognized edges when converting from coloured to gray scale images. The Pratt Figure of Merit (PFOM) is used as a quantitative comparison between the existing traditional edge detection algorithm and the developed algorithm as a means of validation. The PFOM value obtained for the developed algorithm is 0.8480, which showed an improvement over the existing traditional edge detection algorithms.Comment: 5 Page

Pathogencity, Histopathology and Immunoperoxidase Staining of Trypanosomes in Trypanosoma congolense Infected Balb/C Mice

Nigerian Veterinary Journal, Vol. 32(2): 2011; 102 - 11

Overviewing the challenges of Sustainable Development Amidst COVID-19 Pandemic in Nigeria

This paper titled sustainable development in Nigeria amidst covid-19 pandemic: disparity crises to fight or flight. The paper discusses key issues related to the role of the various school taught subjects as means but not an end to sustainable development in Nigeria. The paper operationalizes the concepts of sustainable development and disparity crises. It further explains in detail a reflection on the past, present and mirrors the future trends in relation to the contributions of the various school subjects towards sustainable development in the country. It equally amplifies the militating challenges and factors surrounding the present state of art regarding sustainable development

A survey of load methodologies for shuttle orbiter payloads

Loads methods currently being used to design shuttle orbiter payloads are summarized. Methods used for the design of payloads launched by expendable launch vehicles are described in historical perspective. Experiences gained from expendable launch vehicle payloads are used to develop methodologies for the space shuttle orbiter payloads. The objectives for the development of a new methodology for the shuttle payloads are to reduce the cost and schedule for the payload load analysis by decoupling the payload analysis from the launch vehicle to the maximum extent possible. Methods are described for payload member load estimation or obtaining upper bounds for dynamic loads, as well as load prediction or calculating actual transient member load time histories

Pressure seal Patent

Pressure seals suitable for use in environmental test chamber

The Socio–economic Characteristics of Communities at the Downstream Sector of Jebba Dam, Nigeria

Downstream communities have been neglected in dam construction planning process in Nigeria.. A survey was carried out on some randomly selected downstream communities of Jebba dam namely Gungu, Gana, Fanga, Bele, Bere, Gaba and Baru communities, using structured interviews administered to people in the selected communities. The research result showed that the Jebba dam has negative effect on settlements downstream. About 5% of the houses in each of the villages have been displaced and the value of land has also depreciated by 20%. Farming and fishing in various communities have been affected due to land appropriation, flooding and soil erosion. Only Gungu and Gana are connected to electricity supply while road accessibility is very poor in all the villages except Gungu and Gana. The impacts of these changes are magnified by changes in the flow pattern of The River Niger downstream that is caused by the operations of the dam. These changes, whether in total streamflow in seasonal timing or in short-term, even hourly fluctuations in flows, generate a range of impacts on The River. This is because the aquatic lives in and around the river is tightly linked to the existing flow patterns of river. It is recommended that all villages that are affected by the activities of the dam should be connected to the national grid; this will enhance the socioeconomic activities in the area. It is also suggested as a principle that ‘a programme to monitor the impacts of dam development (particularly in downstream communities) should be an integral element of the planning process, and should be matched by resources to mitigate impacts not addressed fully by the planning processes.Key words: Downstream Communities, Socio-economic, sector, Dam, Characteristics, Flow patter

Analytical Study of the Impact of Islamic Values and the Role of Sufis Orders In West Africa

This article surveyed “Analytical Study Of The Impact Of Islamic Values And The Role Of Sufi Orders In West Africa”; The methodology explored for this article was basically philosophical; this means the materials used came largely from published and unpublished sources. The primary focus is on how Islamic values increased West African economics, socio-political life, religious, intellectual activities, and cultural and syncretism among the various West African countries, the article also analyzed how Islam helped expand trading routes from just the Trans-Saharan to outside of Africa, like Europe, the Middle East, and Asia. Also Timbuktu and both the Mali and Songhai Empires becomes a major trading point. The 19th century Jihads such as that of Sheikh Usman Dan Fodio brought about more far–reaching attempts to reform the whole socio-political, legal and economic system in line with the Qur’an and the practices of the Prophet (saw) and the righteous guided Caliphs. Sheikh Usman, a reformer, who was born in maratta Gobir in 1754 A.C. His father was a scholar and he personally taught sheikh Usman the Qur’an. Later sheikh Usman moved from place to place to be taught by other scholarly relatives. He was much impressed by one of his teachers in Agadesz, Jibril ibn Umar, through whom he was admitted in to a Sufi order. The impact of the Sufi orders in West Africa was spiritual, moral and occasionally political. As indicated, the orders offered a method of achieving spiritual advancement through training in mystical practices. At the same time the sense of belonging to a brotherhood and striving for moral purification under the guidance of a Sheikh would exert influence over the behavior of any Muslim who was seeking to please Allah. In this way the Sufi orders were themselves responsible for attracting people to Islam as well as providing an avenue of spiritual and moral advancement for born Muslim

Detection of Extended-Spectrum Β-Lactamases among Gram Negative Isolates from Gombe Specialist Hospital Using Disc Replacement Method

A total of 500 clinical bacterial isolates from various sources including stool, urine, sputum and swabs obtained from Gombe State Specialist Hospital between July, 2011 and January, 2012 were used in this study. Gram’s stain reaction of the isolates separated them into Gram-positives (200) and Gram-negatives (300). Biochemical tests confirmed the identity of the Gram-negative isolates to be members of the enterobactericeae, which included Klebsiella pneumoniae (60), Escherichia coli (98), Providencia Spp. (32), Morganella moganii (32), Shigella Spp. (14), Citrobacter freundii (14), Serratia marcescens (10), Salmonella paratyphi A (10), Yersinia enterocolitica (8), Proteus vulgaris (4), Salmonella typhi (2) and Pseudomonas aeruginosa (16). Of the 300 Gram-negative isolates subjected to screening using Cefpodoxime (CPX 10μg, oxoid England) and Cefotaxime (CTX 30μg, Oxoid England) for ESβL- production based on Clinical Laboratory Standard Institute (CLSI) breakpoint, 250 (83.33%) were found to be positive which included K. pneumoniae (40), E. coli (92), Providencia Spp. (30), M. morganii (20), P. aeruginosa (14), Shigella Spp. (14), C. freundii (12), S. marcescens (6), and Y. enterocolitica (6), S. paratyphi A (10), P. vulgaris (4) and S. typhi (2). However, one hundred and sixty four, 164 (65.6%) were confirmed ESβL- producers based on DRM using Amoxicillin-clavulanate (AMC 30μg, Oxoid England) which included; K. pneumoniae 32(19.50%), E. coli 52(31.71%), Providencia Spp 20(12.20%), M. morganii 16(9.76%), P. aeruginosa 8(4.88%), Shigella Spp. 12(7.32%), C. freundii 6(3.66%), S. marcescens 4(2.44%), S. paratyphi A 8(4.88%), Y. enterocolitica 6(3.66%), P. vulgaris (0.0%), and S. typhi (0.0%).Keywords: Detection, ESBLs, Clinical isolates, Disc Replacement Method, Gomb