Papers by Abubakar Abdullahi
Simple Fabrication of Bismuth Telluride Used as Saturable Absorber for Generating Microsecond Pulse Fiber Laser
2021 2nd International Conference on Smart Computing and Electronic Enterprise (ICSCEE), 2021
This paper is the explanation of the development of Q-switched Erbium doped fiber (EDF) laser usi... more This paper is the explanation of the development of Q-switched Erbium doped fiber (EDF) laser using Bismuth Telluride Bi2Te3 as SA. The continuous wave (CW) was then demonstrated in the EDF laser, which also shows the output is increased from 0.36 to 6.3 mW by increasing in the pump power from 15 to 147 mW. The center wavelength of 1567.7 nm with a 3dB bandwidth of 0.2 nm at pump power of 112 mW has been reported. The fabrication of Bismuth Telluride Bi2Te3 used a liquid phase exfoliation method. By adding a small piece of qualified Bi2Te3 film was incorporated among two optical fiber ferrules to produce the SA tool after the optical isolator, the generation of Q-switching pulse train in the EDFL cavity with the SA was generated starting from 61 to 112 mW pump power. The highest repetition rate of 46 kHz and the minimum pulse width of 7.8 µs are attained using Bi2Te3 SA with corresponding signal to noise ratios (SNR) of 47 dB. The high SNR values indicate the stability of both Q-switched lasers. The highest pulse energy and output power were achieved at 67 nJ and 4 mW respectively. The result shows a great potential for use in generating Q-switching pulses in the EDFL. The fabrication of both SAs is simple and cheap while the output of both Q-switched lasers is highly stable at room temperature.
Health care facilities are generally unevenly distributed in many parts of the world, especially ... more Health care facilities are generally unevenly distributed in many parts of the world, especially in developing countries where the available facilities are inadequate in relation to the potentially health seeking population. This paper aimed to study the spatial distribution of public health care facilities in Gombe State. The study therefore, focused on understanding the availability, location and spatial distribution and concentration of public healthcare facilities in Gombe State. Secondary data of public healthcare facilities was obtained from Gombe State Primary Health Care Development Agency (GSPHCDA); Location Quotient and GIS techniques were applied to identify areas with surplus and deficit public healthcare facilities in the state in relation to population. The results show that, five (5) Local Government Areas (Akko, Funakaye, Gombe, Nafada and Yamaltu Deba) are deficient in primary healthcare facilities provision, while other six (6) Local Government Areas (Balanga, Bill...
International Affairs and Global Strategy, 2015
This paper examines the link between globalization, identity crisis and insurgency in northern Ni... more This paper examines the link between globalization, identity crisis and insurgency in northern Nigeria vis-a-vis the Sahel. The central thesis of the paper is that globalization has ostensibly increased the layers of identity contestations in Nigeria and proliferated platforms upon which identity conflicts are waged. The paper argued that the trajectory of insurgency in Nigeria and Sahel is complicated by the character of state-society relations and the dilemma of demarcating boarders of citizenship from boarder of identity . It contends that West Africa has robust security governance mechanism that is weakened by lack of synergy of capacity and strategy. The paper concludes that Nigeria and Sahel states should strengthen partnerships for regional security governance while striking a proper balance between domestic and transnational forces of globalization. Keywords: Boko Haram, Globalization, Insurgency, Identity, Security, Governance
Scholars Journal of Physics, Mathematics and Statistics, 2020
Original Research Article Tuberculosis was declared an emergency in Nigeria and strategies for th... more Original Research Article Tuberculosis was declared an emergency in Nigeria and strategies for the control of tuberculosis in Nigeria were adopted to reduce its prevalence to a level at which the disease will no longer constitute public health problems. In this work, we presented a deterministic (SEIR susceptible, expose/latently infected, infectious and recovered) model incorporating the method of control adopted by national tuberculosis and leprosy control program. We established the disease free and the endemic equilibrium states and carried out the stability analysis of the disease. Free and the equilibrium state. We also carried out numerical simulation of the model to have an insight into the dynamics of the model. We found out that the disease free equilibrium state is stable. The numerical results showed that it would be very difficult to completely eradicate tuberculosis from Nigeria using the method adopted by national tuberculosis and leprosy control program.
American International Journal of Sciences and Engineering Research, 2019
Automatic car parking obtains information about available parking space, process it and then plac... more Automatic car parking obtains information about available parking space, process it and then place the car at certain position. It is inevitable for the people to update with the growing technology and generally people are facing problems on parking vehicles in parking slot in a city. The Automatic car parking which enables the user to find the nearest parking area and gives availability of parking slots in that respective parking area with the help of LCD display and it mainly focus on reducing the time in finding the parking slots and also it avoids the unnecessary travelling through filled parking slots in a parking area. Thus, it reduces the fuel consumption which in turn reduces carbon footprints in an atmosphere. Sometimes, it is very difficult to find a suitable parking place in parking lot. This research paper has proposed a suitable solution to this problem.
For the last fifty years, social studies teachers have been prepared to teach from a global persp... more For the last fifty years, social studies teachers have been prepared to teach from a global perspective, but since September 11, 2001 have faced a difficult challenge teaching from a global perspective. This study examines ninety secondary school teachers' global knowledge and their disposition toward teaching from a global perspective. One of the central goals of global education is developing and promoting global perspectives. Even after the transformation of the world economy and the establishment of global political institutions and systems, the end of the Cold War, and the September 11 event, the development, promotion and teaching of global perspectives in American public schools continue to pose a challenge to social studies teachers (Kirkwood, 2001; Merryfield, 2001). Since the attacks on September 11, we now know how interconnected and interdependent the world has truly become. Yet our public schools are not taking adequate and appropriate steps to teach and prepare students to understand the nature and complexity of global issues and problems (Merryfield, 2001). What global knowledge do secondary social studies teachers have? There were two underlying assumptions behind the study. First, secondary social studies teachers play a critical role in shaping, guiding, and preparing students to be critical and reflective thinkers. Second, the study of global knowledge, attitudes, and pedagogy offers some practical lessons in how secondary level teachers can gauge the level of global knowledge, instructional methods, and disposition toward global mindedness. The current global realities require social studies teachers to have (a) content knowledge, (b) pedagogical content knowledge, and (c) knowledge of students characteristics and differences (Shulman, 1978). Furthermore, the global realities require social studies teachers to use a variety of instructional strategies such as (a) open-ended discussion, (b) reflective journals entry, (c) roleplaying, (d) visual discovery, (e) global skills builders, (f) global reading for writing and understanding, (g) problem-solving/decision-making skills, (h) conflict resolution skills, (i) experiential/cooperative learning activity, and (j) simulations to help students identify the causes, reasons and factors that gave rise to global problems and conflicts. Within this context, social studies teachers should develop the necessary knowledge and understanding of issues, problems, and solutions as well as pedagogical knowledge.
Journal of Economics, Management and Trade, 2019
Nigeria is facing profound social, economic and environmental impact of population growth, develo... more Nigeria is facing profound social, economic and environmental impact of population growth, development and environmental constraints. It is apparent that government alone has limited capacity to deal with all these problems. NGOs being one of the most effective partners have been playing supportive roles with the government, in some cases, they are considered more effective to get attached with the grass root level developmental initiatives. However, despite the role NGOs played, their presence and impact is not fully evaluated, recognized and appreciated by many governments and community members. It is for this reason this article attempts to examine whether projects executed by NGOs have any impact on sustainable development in Katsina Metropolis, given special emphasis on projects that dealt with environmental protection, poverty alleviation and health care services. The study further look at whether efficiency of NGOs officials has any impact on success of sustainable developmen...
Journal of Social and Political Sciences, 2019
Rural banditry is increasingly becoming one of the worst forms of domestic insurgencies affecting... more Rural banditry is increasingly becoming one of the worst forms of domestic insurgencies affecting West African sub-region. The prevalence and severity of rural banditry has contributed to the rising increase of regional insecurity with a potential threat on regional integration of West Africa. With reference to Nigeria, this paper examines the nature and dynamics of rural banditry and its overall international security implications as well as describe how it inputs into West African states efforts towards regional security and integration. Using secondary sources of data, the study revealed that rural banditry is a resource-based conflict compounded by elite conspiracy, the primitive quest for wealth and general poverty situation which affected the people of West Africa. It has become a lucrative business accentuated by bad governance, political clientelism, the gradual disappearance of grazing lands and routes, urbanization, climate change, and absence of effective conflict resolution mechanisms. The paper revealed that rural banditry has gradually evolved into a sub-regional conflict with socioeconomic and political implications on efforts towards West African security and integration. The study found that some of the implications of rural banditry with consequences on regional integration of West African include radicalization of youth, increase rate of youth unemployment and their subsequent involvement in illicit gun and narcotic drug trade across the sub-region, the emergence of a network of miscreants groups, gradual collapse of agricultural and livestock development with effects on income, trade and commerce, proliferation of small firearms and light weapons, bastardization of traditional institutions and hostile ethnic and tribal relations among ethnic groups, illegal migration and refugee problems across the subregion as well as proliferation and networking of domestic insurgency groups threatening regional peace and stability of the sub-region. In this regard, the paper recommends a comprehensive review of regional security and integration initiatives, regional security and intelligence cooperation among security agencies of ECOWAS countries, increase surveillance and border security, awareness creation and dialogue among local communities as some of the ways of reducing the scourge of rural banditry across West African sub-region.
International Journal of Oral Science, 2019
The oral microbiota is associated with oral diseases and digestive systemic diseases. Nevertheles... more The oral microbiota is associated with oral diseases and digestive systemic diseases. Nevertheless, the causal relationship between them has not been completely elucidated, and colonisation of the gut by oral bacteria is not clear due to the limitations of existing research models. The aim of this study was to develop a human oral microbiota-associated (HOMA) mouse model and to investigate the ecological invasion into the gut. By transplanting human saliva into germ-free (GF) mice, a HOMA mouse model was first constructed. 16S rRNA gene sequencing was used to reveal the biogeography of oral bacteria along the cephalocaudal axis of the digestive tract. In the HOMA mice, 84.78% of the detected genus-level taxa were specific to the donor. Principal component analysis (PCA) revealed that the donor oral microbiota clustered with those of the HOMA mice and were distinct from those of specific pathogen-free (SPF) mice. In HOMA mice, OTU counts decreased from the stomach and small intestine to the distal gut. The distal gut was dominated by Streptococcus, Veillonella, Haemophilus, Fusobacterium, Trichococcus and Actinomyces. HOMA mice and human microbiota-associated (HMA) mice along with the GF mice were then cohoused. Microbial communities of cohoused mice clustered together and were significantly separated from those of HOMA mice and HMA mice. The Source Tracker analysis and network analysis revealed more significant ecological invasion from oral bacteria in the small intestines, compared to the distal gut, of cohoused mice. In conclusion, a HOMA mouse model was successfully established. By overcoming the physical and microbial barrier, oral bacteria colonised the gut and profiled the gut microbiota, especially in the small intestine.
African Journal of Political Science and International Relations, May 31, 2015
International development agencies are important actors for democracy promotion, especially in de... more International development agencies are important actors for democracy promotion, especially in developing countries. In this regard, there has been an upsurge of these agencies in Nigeria's democratization process. This paper examines Democratic Governance for Development (DGD) as one of the initiatives of international development agencies toward promoting democracy in Nigeria. Specifically, the initiative has been providing assistance to state and non-state actors such as electoral commission, political parties and civil society groups towards promoting credible election in Nigeria. With the aid of qualitative data, the paper revealed that DGD project has provided technical and financial support to Civil Society Organizations (CSOs) to monitor and observe elections, create public awareness and strengthen other forms of civic engagement in order to influence the conduct of credible election in the country. However, the paper shows that lack of proper coordination of support, inadequate data base of the CSOs; absence of reliable instruments for assessment of support, lack of internal democracy in the conduct of the CSOs as well as mismanagement of resources all combined and affect democracy support towards credible elections in Nigeria. Thus, the paper concludes that international assistance for credible election could only be meaningful and effective by eliminating the culture of impunity, providing instrument of evaluation of support as well as continuing capacity building of the CSOs in Nigeria.
Nigeria's public service and new public management reform / Ahmad Sanusi and Abubakar Abdullahi
Higher Education of Social Science, Sep 26, 2014
Drama has been widely acclaimed as a positive medium for mirroring the society. Drama is a repres... more Drama has been widely acclaimed as a positive medium for mirroring the society. Drama is a representation of life. So while drama entertains, it also educates and informs. This role of drama has been employed by playwrights over the years to make constructive commentaries on the issues and happenings in society and thus suggests and recommends for positive changes in man and his environment. The Nigerian Arabic playwrights are not left out in this direction of literary activities. This paper attempts an analysis of how Nigerian Arabic playwrights are also using drama to make comments on society as well educating the society using Barihi's Baqaun Muqadrun (Destined to survive) as a paradigm. We shall also look at the art of Arabic play writing in Nigeria in brief, synopsis of the play, play analysis and conclusion.
Corruption, Governance and the Politics of De-industrialization in Nigeria
International Journal of Physical and Social Sciences, 2013
This paper intends a discourse about relationship between corruption and de-industrialization in ... more This paper intends a discourse about relationship between corruption and de-industrialization in Nigeria. It seeks to do this by offering a critical narrative of how corruption forged an identity of interests among political and administrative office-holders in adopting and implementing policy measures which tended to de-industrialize the country. The overall effect of all this is not only the closure of many factories and consequent loss of industrial jobs but also dependence of the country on foreign goods of poor industrial quality. Consequently, the Nigerian state embarked on neo-liberal reforms to reverse this ugly trend. Regrettably, these policies would only further add to de-industrialization of the manufacturing sector of the state. In this regard, the study posits that the crisis of development and corruption that ravaged the Nigeria's political economy could be located within the context of these neo-liberal policies. Thus, such policies could be said to be an exercise in futility and has further compounded the problems of corruption and development in the country.
In silico analysis of squamous cell lung carcinoma microarray gene expression signature for therapeutic target identification
The importance of finance on economic growth cannot be underscored and has long being highlighted... more The importance of finance on economic growth cannot be underscored and has long being highlighted by existing studies. However, most previous studies are restrictive either to the analysis of banking sector or stock market development on economic growth. By so doing, these studies have failed to capture the full effect of financial development on economic growth. Again, the study of finance-growth nexus is being confronted with the problem of choice of most suitable measure of financial development as each indicator of financial sector development has its merits and demerits. Again, the effect of finance on growth may not apply uniformly across all countries. Also, the debate on the effect of openness on financial sector development is mixed. It is argued that certain preconditions are necessary and should precede financial liberalization. One of such argument is the simultaneous opening of trade and capital account as proposed by Rajan and Zingales (2003).
The study predicted Evapotranspiration of Maize Grain and wheat using FAO 56-Penman- Monteith (FP... more The study predicted Evapotranspiration of Maize Grain and wheat using FAO 56-Penman- Monteith (FPM), FAO 24-Blaney-Criddle (FBC), Jensen-Haise (JHM) and Hargreaves (HGM) methods. To achieve this, Four ETo prediction models were evaluated using daily meteorological data. Three of the models were compared with FAO 56 Penman-Monteith equation as the standard recommended for semi-arid region by FAO. Climatic data comprising of rainfall distribution from 1996-2005 of Maiduguri, Borno State Capital and suitable crop coefficients (Kc) were employed to predict ETo and crop evapotranspiration (ETc) of maize grain and Wheat for this region. The predicted ETc values were first compared using regression analysis and were further examine using correlation analysis. Results from these analyses shows that, HGM (R2 = 0.978) gave the best result for predicting ETc of Maize grain with correlation coefficient of 0.989. Meanwhile, JHM (R2 = 0.910) yields the best estimate for predicting ETc of Wheat (w...
Group-Based Quantitative Structure Activity Relationship (GQSAR) of Phosphoinositide-3-kinase-beta (PI3K-β) Inhibitors
The Journal of Toxicological Sciences, 2012
Recently, two novel dipyrroles with m/z values 333 and 315 have been identified in vitro (Abu-Bak... more Recently, two novel dipyrroles with m/z values 333 and 315 have been identified in vitro (Abu-Bakar et al., 2011; De Matteis et al., 2006) but their presence in biological samples has yet to be determined. In the present study, we measured urinary excretion of dipyrrolic BOMs, as stress markers in mice treated with sodium arsenite. MATERIALS AND METHODS Chemicals and Antibodies Sodium arsenite (iAsIII)) was purchased from Unilab
Research Journal of Environmental Toxicology, 2010
Journal of Medical Sciences, 2007
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Papers by Abubakar Abdullahi