ORCID Profile
0009-0005-6671-5505
Current Organisations
University of Maiduguri
,
University of Adelaide
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Elsevier BV
Date: 09-1986
Publisher: Elsevier BV
Date: 07-1982
Publisher: Elsevier BV
Date: 12-1997
Publisher: CSIRO Publishing
Date: 1997
DOI: 10.1071/P96073
Abstract: Recent experiments, carried out in highly pure s les of molecular nitrogen, have demonstrated the strong influence exerted by neutral, excited metastable states. The influence of the electronically excited, metastable N2(A) state on the ionisation growth is demonstrated through observation of the diffusion phenomena associated with the spatial and temporal growth of ionisation. Evidence has also emerged demonstrating the existence of a second metastable particle influence. The diffusion time observed, however, is not consistent with it being due entirely to an electronically excited state such as the metastable N2(a′) state. Rather the observations suggest the possibility that intersystem crossings between the N2(a′), the highly vibrationally excited N2(X) states and the N2(A) state may be responsible for the increased diffusion time and large molecular size. The possible relevance of these findings to applications such as plasma nitriding is canvassed.
Publisher: CSIRO Publishing
Date: 1997
DOI: 10.1071/P96071
Abstract: Ongoing work aimed at developing highly efficient methods of populating a chosen sublevel of an energy level highlights the need to understand off-resonant effects in coherent excitation. This motivated us to re-examine some aspects of the theory of coherent excitation in a three-state system with a view to obtaining algebraic expressions for off-resonant eigenvalues and eigenvectors. Earlier work gives simple closed-form expressions for the eigenvalues this system, expressions applying even when the system is not on two-photon resonance. We present here expressions of similar simplicity for the components of the normalised eigenvectors. The analytic properties of these components explain the observed sensitivity of the stimulated-Raman-adiabatic-passage process (STIRAP) to the condition of two-photon resonance. None of the eigenstates is ‘trapped’ or ‘dark’ unless the system is on two-photon resonance off resonance, all states have nonzero projections on the unperturbed intermediate state. A simple argument shows that no dressed state can be adiabatically connected to both the unperturbed initial and final states when the system is off two-photon resonance. That is, adiabatic transfer from initial to final state requires that these be degenerate before and after the STIRAP pulse sequence, and this implies zero two-photon detuning. However, substantial transfer probabilities are observed experimentally for very small two-photon detunings. We show that such systems are characterised by very sharp avoided crossings of two eigenvalues, and that the observed population transfer can be understood as an effect of non adiabatic transitions occurring at the avoided crossings.
Publisher: American Physical Society (APS)
Date: 03-1989
Publisher: Elsevier BV
Date: 06-1981
Publisher: Frontiers Media SA
Date: 17-05-2022
DOI: 10.3389/FPUBH.2022.814981
Abstract: Medical and socio-economic uncertainties surrounding the COVID-19 pandemic have had a substantial impact on mental health. This study aimed to systematically review the existing literature reporting the prevalence of anxiety and depression among the general populace in Africa during the COVID-19 pandemic and examine associated risk factors. A systematic search of the following databases African Journal Online, CINAHL, PubMed, Scopus, and Web of Science was conducted from database inception until 30th September 2021. Studies reporting the prevalence of anxiety and/or depression among the general populace in African settings were considered for inclusion. The methodological quality of included studies was assessed using the Agency for Healthcare Research and Quality (AHRQ). Meta-analyses on prevalence rates were conducted using Comprehensive Meta-analysis software. Seventy-eight primary studies (62,380 participants) were identified from 2,325 studies via electronic and manual searches. Pooled prevalence rates for anxiety (47%, 95% CI: 40–54%, I 2 = 99.19%) and depression (48%, 95% CI: 39–57%, I 2 = 99.45%) were reported across Africa during the COVID-19 pandemic. Sex (female) and history of existing medical/chronic conditions were identified as major risk factors for anxiety and depression. The evidence put forth in this synthesis demonstrates the substantial impact of the pandemic on the pervasiveness of these psychological symptoms among the general population. Governments and stakeholders across continental Africa should therefore prioritize the allocation of available resources to institute educational programs and other intervention strategies for preventing and ameliorating universal distress and promoting psychological wellbeing. www.crd.york.ac.uk rospero/display_record.php?ID=CRD42021228023 , PROSPERO CRD42021228023.
Publisher: American Physical Society (APS)
Date: 08-1986
Publisher: Elsevier BV
Date: 1986
Publisher: Elsevier BV
Date: 09-1985
Publisher: American Physical Society (APS)
Date: 03-1985
Publisher: American Physical Society (APS)
Date: 1988
Publisher: American Physical Society (APS)
Date: 05-1984
Publisher: Elsevier BV
Date: 07-1978
Publisher: Elsevier BV
Date: 05-1999
Publisher: The Optical Society
Date: 20-03-2019
DOI: 10.1364/AO.58.002408
Publisher: Elsevier BV
Date: 2000
Publisher: Elsevier BV
Date: 08-1980
Publisher: Elsevier BV
Date: 1998
Publisher: American Physical Society (APS)
Date: 12-11-1979
Publisher: Elsevier BV
Date: 06-1979
Publisher: American Physical Society (APS)
Date: 03-1985
Publisher: Elsevier BV
Date: 1988
Publisher: IEEE
Date: 05-2010
Publisher: IOP Publishing
Date: 07-1997
DOI: 10.1143/JJAP.36.4941
Abstract: This study compares the nitriding efficiency of a low-pressure pure-nitrogen rf plasma for the materials AISI-316 stainless steel, 99.8% iron and the low-alloy steels AISI 4140 and En41B. The process temperature was 400° C a range of gas pressures and biasing conditions was explored. The treated s les were examined using instrumented microhardness measurements, proton backscattering, X-ray diffraction and other diagnostics. The degree of nitriding is enhanced by increased bombardment by excited neutral molecules. Ion bombardment assists in the nitriding of iron and the low-alloy steels studied, apparently by aiding the production of Fe 2-3 N. This phase does not form in the nitriding of 316 stainless steel, and therefore treatment of this material is not assisted by ion bombardment. In comparing low-pressure rf plasmas to procedures involving higher pressures and temperatures, the process described here is more appropriate for hardening austenitic stainless steel, but perhaps less appropriate for the other materials.
Publisher: Frontiers Media SA
Date: 17-01-2022
DOI: 10.3389/FPSYT.2021.804525
Abstract: This meta-review aimed to provide a comprehensive overview of overall mental health of healthcare professionals during the COVID-19 pandemic. We conducted a comprehensive literature search on Academic Search Premier, CINAHL, Cochrane Library, and MEDLINE. A predefined eligibility criterion was used to screen the articles. The methodology quality of eligible studies was assessed using Joanna Briggs Institute checklist for systematic reviews. The data were narratively synthesised in line with the meta-review aim. Forty systematic reviews (represented as K = 40), which reported data from 1,828 primary studies ( N ) and 3,245,768 participants, met the inclusion criteria. The findings from a pooled prevalence indicate that anxiety (16–41%, K = 30, N = 701), depression (14–37%, K = 28, N = 584), and stress ost-traumatic stress disorder (18.6–56.5%, K = 24, N = 327) were the most prevailing COVID-19 pandemic-related mental health conditions affecting healthcare workers. Other reported concerns included insomnia, burnout, fear, obsessive-compulsive disorder, somatization symptoms, phobia, substance abuse, and suicidal thoughts. Considering regions/countries, the highest anxiety was reported in the United-Kingdom [22.3, 95% Confidence Interval (CI):7–38, N = 4] compared to other countries, while the highest depression was in the Middle-East, (41, 95% CI:16–60, N = 5) and stress in the Eastern Mediterranean region (61.6, 95% CI:56.4–66.8, N = 2) compared to other regions. The most significant risk factors include female gender, younger age, being a nurse, and frontline professional. The most-reported coping strategies include in idual/group psychological support, family/relative support, training/orientation, and the adequacy of personal protective equipment. It was concluded that healthcare professionals (nurses, doctors, allied health) have experienced various mental health issues during COVID-19 pandemic. The meta-review, therefore, recommends targeted interventions and health policies that address specific mental health issues to support health professionals worldwide during the duration of the COVID-19 pandemic and similar future health crises. www.crd.york.ac.uk rospero/display_record.php?ID=CRD4202126200 , identifier: CRD42021262001.
Publisher: MDPI AG
Date: 25-09-2022
DOI: 10.3390/COVID2100097
Abstract: The purpose of this study was to examine the subjective reasons for hesitancy to receive COVID-19 vaccination and the sociodemographic factors associated with vaccination uptake. An online social media survey was conducted among the general Nigerian population using a self-developed questionnaire. Data were analyzed using binary logistic regression with crude and adjusted odds ratios (AOR) at a 95% confidence interval (CI) and a p value of less than 0.05. A total of 576 participants with a mean age of 31.86 years participated in the study. 28% (n = 158) received one or more doses of the COVID-19 vaccine. Teachers were significantly less likely than health professionals to be vaccinated (AOR = 0.33, 95% CI 0.16–0.69). In addition, unemployed people (AOR = 0.37, 95% CI 0.15–0.89) were less likely to be vaccinated than government employees, and those of intermediate socioeconomic status (AOR = 0.47 95% CI 0.26–0.88) were less likely to be vaccinated than were those of high socioeconomic status. Five main themes emerged regarding participants’ subjective reasons for hesitating to receive the COVID-19 vaccine: fear related to vaccine content (e.g., efficacy), negative effects on the body (e.g., blood clots), distrust of the system/government (e.g., politics), psychological concerns (e.g., anxiety), and misconceptions. Sociodemographic variables and vaccine misconceptions were found to play an important role in COVID-19 vaccination coverage in Nigeria.
Publisher: Elsevier BV
Date: 08-1984
Publisher: Elsevier BV
Date: 04-1984
Publisher: American Physical Society (APS)
Date: 11-04-1977
Publisher: Pan African Medical Journal
Date: 2020
Publisher: IOP Publishing
Date: 02-1977
Publisher: Elsevier BV
Date: 05-1996
Publisher: Elsevier BV
Date: 08-2001
Publisher: Elsevier BV
Date: 08-1980
Publisher: Elsevier BV
Date: 07-1985
Publisher: Elsevier BV
Date: 05-1999
Publisher: Elsevier BV
Date: 05-2022
Publisher: Elsevier BV
Date: 09-2005
Publisher: Elsevier BV
Date: 08-1987
Publisher: Elsevier BV
Date: 02-2007
Publisher: Elsevier BV
Date: 12-1977
Publisher: American Physical Society (APS)
Date: 11-1984
Publisher: Elsevier BV
Date: 06-1987
Publisher: Informa UK Limited
Date: 08-2003
Publisher: IOP Publishing
Date: 21-06-1997
Publisher: Elsevier BV
Date: 08-1988
Publisher: Elsevier BV
Date: 04-1979
Publisher: IOP Publishing
Date: 14-12-1994
Publisher: Elsevier BV
Date: 10-1992
Publisher: Elsevier BV
Date: 2003
Publisher: Elsevier BV
Date: 06-1983
Publisher: Military Operations Research Society
Date: 12-2008
DOI: 10.5711/MORJ.13.1.5
Publisher: American Physical Society (APS)
Date: 11-03-1985
Publisher: American Physical Society (APS)
Date: 03-1986
Publisher: Elsevier BV
Date: 12-1983
Publisher: American Physical Society (APS)
Date: 07-1995
Publisher: IOP Publishing
Date: 14-07-1993
Publisher: Elsevier BV
Date: 11-1994
Publisher: Elsevier BV
Date: 06-1988
Publisher: Elsevier BV
Date: 05-1996
Publisher: Elsevier BV
Date: 12-1977
Publisher: American Physical Society (APS)
Date: 02-1987
Publisher: American Physical Society (APS)
Date: 08-12-1980
Publisher: Elsevier BV
Date: 03-1989
Location: Japan
No related grants have been discovered for Mustapha Adam Kolo.