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Prompt neutron lifetime calculations for the NIRR-1 reactor
Ibrahim, Yakubu V.,Adeleye, Micheal O.,Njinga, Raymond L.,Odoi, Henry C.,Jonah, Sunday A. Techno-Press 2015 Advances in energy research Vol.3 No.2
Prompt neutron lifetime calculations have been performed for the NIRR-1 reactor HEU and LEU cores using the 1/v insertion and the Adjoint flux weighing methods. Results of calculations obtained for the HEU and LEU cores are respectively $57.3{\pm}0.8$ and $47.5{\pm}0.7$ for the 1/v insertion and $56.9{\pm}0.3$ and $46.3{\pm}0.5$ for the Adjoint flux. There is a good agreement seen between the two methods for both cores. The prompt neutron lifetime was observed to be shorter in the LEU than for the HEU as expected. However, the Adjoint flux weighing method seemed to be the easiest method in calculating the prompt neutron lifetime for NIRR-1.
Muazu Ibrahim,Ibrahim Osman Adam,Yakubu Awudu Sare 세종대학교 경제통합연구소 2019 Journal of Economic Integration Vol.34 No.1
Studies on the drivers of Foreign Direct Investment (FDI) in Africa have not rigorously examined whether recent advances in the continent’s Information, Communication and Technology (ICT) infrastructure and financial development have any role in attracting foreign capital. This study re-examines the determinants of FDI inflows, paying special attention to the ICT and financial sector environments. By relying on a panel dataset covering 46 countries in sub-Saharan Africa over the period 1980~2016, using the generalized method of moments (GMM) method, our study shows that well–developed ICT infrastructure robustly spurs FDI regardless of the measure of ICT. On the other hand, the impact of domestic financial development on FDI is conditioned on the proxy of finance. Specifically, while domestic (private) credit to GDP inhibits (promotes) foreign capital inflows, higher levels of ICT in the environment dampen the deleterious effect of finance on FDI. We document the threshold levels of ICT necessary to exert such dampening effects.
Muazu Ibrahim,Ibrahim Osman Adam,Yakubu Awudu Sare 세종대학교 경제통합연구소 2019 Journal of Economic Integration Vol.34 No.2
Studies on the drivers of Foreign Direct Investment (FDI) in Africa have not rigorously examined whether recent advances in the continent’s Information, Communication and Technology (ICT) infrastructure and financial development have any role in attracting foreign capital. This study re-examines the determinants of FDI inflows, paying special attention to the ICT and financial sector environments. By relying on a panel dataset covering 46 countries in sub-Saharan Africa over the period 1980~2016, using the generalized method of moments (GMM) method, our study shows that well–developed ICT infrastructure robustly spurs FDI regardless of the measure of ICT. On the other hand, the impact of domestic financial development on FDI is conditioned on the proxy of finance. Specifically, while domestic (private) credit to GDP inhibits (promotes) foreign capital inflows, higher levels of ICT in the environment dampen the deleterious effect of finance on FDI. We document the threshold levels of ICT necessary to exert such dampening effects.
Development of an Obstacle Avoidance Robotic Vehicle with Android and Infrared Control
Yakubu Abdulnasir Muhammad,Seungmin Oh,Kabir Ibrahim Jahun 한국디지털콘텐츠학회 2023 The Journal of Contents Computing Vol.5 No.2
The vehicle seamlessly integrates an Android application and an infrared remote-control system, ensuring user-friendly operation and versatility. Communication between the Android application and the robotic vehicle is facilitated through a Bluetooth module, enabling effortless command transmission and enhancing the user experience. The vehicle is equipped with an array of sensors that continuously scan its surroundings during motion, serving as its eyes to monitor potential obstacles. Upon detecting an obstacle, the vehicle autonomously halts and initiates an intelligent search for an obstacle-free route, ensuring safety and minimizing disruptions in its trajectory. This research explores the potential applications, ranging from discreet, autonomous patrolling in surveillance operations to precise and secure cargo transportation in logistics. By integrating cutting-edge mobile technology with robotics, this project sets the stage for innovative, adaptable, and safer autonomous vehicles poised to thrive in a dynamic technological landscape.
Foreign Direct Investment, Sectoral Effects and Economic Growth in Africa
Eric Evans Osei Opoku,Muazu Ibrahim,Yakubu Awudu Sare 한국국제경제학회 2019 International Economic Journal Vol.33 No.3
Earlier studies on the impact of Foreign Direct Investment (FDI) on economic growth have not been instructive largely on their failure to examine the sectoral transmission channels through which FDI affects growth. We re-examine the impact of FDI on economic growth in Africa using the system generalized method of moments. The results reveal that, while FDI positively and unconditionally spurs economic growth, its growth-enhancing effect is imaginary when the conditional sectoral effects are introduced. On the channels of manifestation, we notice that the pass-through impact of FDI is only significant for the agricultural and service sectors.
Xinyu Yang,Shijun Zhang,Junxiao Su,Sai Guo,Yakubu Ibrahim,Kai Zhang,Yonghao Tian,Lianlei Wang,Suomao Yuan,Xinyu Liu 대한척추신경외과학회 2024 Neurospine Vol.21 No.1
Objective: To compare the long-term clinical and radiographic outcomes of transforaminal endoscopic lumbar discectomy (TELD) versus microdiscectomy (MD). Methods: The data of 154 patients with lumbar disc herniation (LDH) who underwent TELD (n = 89) or MD (n = 65) were retrospectively analyzed. The patients’ clinical outcomes were evaluated using visual analogue scales for leg and low back pain, the Japanese Orthopaedic Association (JOA) score, and the Oswestry Disability Index (ODI). The evolution of radiographic manifestations was observed during follow-up. Potential risk factors for a poor clinical outcome were investigated. Results: During a mean follow-up of 5.5 years (range, 5–7 years), the recurrence rate was 4.49% in the TELD group and 1.54% in the MD group. All scores significantly improved from preoperatively to postoperatively in both groups (p < 0.01). The improvement in the ODI and JOA scores was significantly greater in the TELD than MD group (p < 0.05). Forty-seven patients (52.8%) in the TELD group and 32 (49.2%) in the MD group had Modic changes before surgery, most of which showed no changes at the last follow-up. The degeneration grades of 292 discs (71.0%) were unchanged at the last follow-up, while 86 (20.9%) showed improvement, mostly at the upper adjacent segment. No significant difference was observed in the intervertebral height index or paraspinal muscle-disc ratio. Conclusion: Both TELD and MD provide generally satisfactory long-term clinical outcomes for patients with LDH. TELD can be used as a reliable alternative to MD with less surgical trauma. Modic type II changes, decreased preoperative intervertebral height, and a high body mass index are predictors of a poor prognosis. Objective: To compare the long-term clinical and radiographic outcomes of transforaminal endoscopic lumbar discectomy (TELD) versus microdiscectomy (MD). Methods: The data of 154 patients with lumbar disc herniation (LDH) who underwent TELD (n = 89) or MD (n = 65) were retrospectively analyzed. The patients’ clinical outcomes were evaluated using visual analogue scales for leg and low back pain, the Japanese Orthopaedic Association (JOA) score, and the Oswestry Disability Index (ODI). The evolution of radiographic manifestations was observed during follow-up. Potential risk factors for a poor clinical outcome were investigated. Results: During a mean follow-up of 5.5 years (range, 5–7 years), the recurrence rate was 4.49% in the TELD group and 1.54% in the MD group. All scores significantly improved from preoperatively to postoperatively in both groups (p < 0.01). The improvement in the ODI and JOA scores was significantly greater in the TELD than MD group (p < 0.05). Forty-seven patients (52.8%) in the TELD group and 32 (49.2%) in the MD group had Modic changes before surgery, most of which showed no changes at the last follow-up. The degeneration grades of 292 discs (71.0%) were unchanged at the last follow-up, while 86 (20.9%) showed improvement, mostly at the upper adjacent segment. No significant difference was observed in the intervertebral height index or paraspinal muscle-disc ratio.
Babayo Sule,Bakri Mat,Mohd Azizuddin Mohd Sani,Saalah Yakubu Ibrahim 한국외국어대학교 국제지역연구센터 2019 International Area Studies Review Vol.22 No.4
A periodic election is a fundamental pillar and backbone of any democratic regime, and for a proper election to take place there must be some activities, most especially by parties and contestants to vote for them most especially competing to secure the electorates. These activities require huge expenditure from the parties and their financiers through campaigns, media advertisements and other related activities. The problem is that parties and their candidates are allowed, in Nigeria constitutionally and by the Electoral Act 2010, to source their campaign finance privately, which has led to illegal financing. The objective of this paper is to examine the sources of parties’ campaign expenditure in the Fourth Republic, taking the 2015 General Election as the case study. The research used a qualitative method of data collection and analysis where both primary and secondary sources were used. The primary source was an in-depth personal interview with some selected informants/participants from the categories of stakeholders in the electoral process, parties, and agencies responsible for regulating their activities. The secondary source was the use of available documents such as books, journals and Internet sources on the subject matter of the study. The data obtained were analysed and interpreted using thematic analytical interpretations from the informants’ views and the existing data in the field. The research discovered that there are basically six major sources of campaign expenditure for parties and that some of the sources are illegal and the spending has violated the regulations. The research recommends thorough supervision and monitoring of the sources of parties’ campaign expenditure and the spending process.