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Assessment of the performance of the TOPGNSS and ANN-MB antennas for ionospheric measurements using low-cost u-blox GNSS receivers

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Geodesy and Geodynamics 2024年第3期15卷 291-301页

作者： Daniel Okoh Aderonke Obafaye Oluwakemi Dare-idowu Babatunde Rabiu Anton Kashcheyev Claudio Cesaroni j.hn Bosco Habarulema Bruno Nava United Nations African Regional Centre for Space Science and Technology Education-English(UN-ARCSSTE-E) Obafemi Awolowo University CampusIle IfeNigeria National Institute for Geophysics and Volcanology(INGV) 00143 RomeItaly Institute for Space Science and Engineering African University of Science and TechnologyAbujaNigeria University of New Brunswick FrederictonCanada South African National Space Agency(SANSA) P.O Box 32Hermanus 7200South Africa Department of Physics and Electronics Rhodes University6140 MakhandaSouth Africa The Abdus Salam International Centre for Theoretical Physics Strada Costiera11I-34151 TriesteItaly

Low-cost GNSS receivers have recently been gaining reliability as good candidates for ionospheric studies. In line with these gains are genuine concerns about improving the performance of these receivers. In this work, we present a comprehensive investigation of the performances of two antennas(the u-blox ANN-MB and the TOPGNSS TOP-106) used on a low-cost GNSS receiver known as the u-blox ZED-F9P. The two antennas were installed on two identical and co-located u-blox receivers. Data used from both receivers cover the period from j.nuary to j.ne 2022. Results from the study indicate that the signal strengths are dominantly greater for the receiver with the TOPGNSS antenna than for the receiver with the ANN-MB antenna, implying that the TOPGNSS antenna is better than the ANN-MB antenna in terms of providing greater signal strengths. Summarily, the TOPGNSS antenna also performed better in minimizing the occurrence of cycle slips on phase TEC measurements. There are no conspicuous differences between the variances(computed as 5-min standard deviations) of phase TEC measurements for the two antennas, except for a period around May-j.ne when the TOPGNSS gave a better performance in terms of minimizing the variances in phase TEC. Remarkably, the ANN-MB antenna gave a better performance than the TOPGNSS antenna in terms of minimizing the variances in pseudorange TEC for some satellite observations. For precise horizontal(North and East) positioning, the receiver with the TOPGNSS antenna gave better results, while the receiver with the ANN-MB antenna gave better vertical(Up) positioning. The errors for the receivers of both antennas are typically within about 5 m(the monthly mean was usually smaller than 1 m) in the horizontal direction and within about 10 m(the monthly mean was usually smaller than 4 m) in the vertical direction.

关键词： GNSS Ionosphere Low-cost Antenna TOPGNSS U-blox

Audit of Neonatal j.undice as Experienced at a Mission Hospital in Western Nigeria

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Open j.urnal of Pediatrics 2024年第1期14卷 50-62页

作者： j.el-Medewase Victor idowu Department of Paediatrics and Child Health Ladoke Akintola University of Technology Ogbomoso Nigeria

Introduction: Neonatal j.undice (NNj. is a common disorder in neonates that can impact negatively on the brain and cause death. The peculiarities in aetiology and solutions for different settings are a knowledge gap. This informed the desire to determine local aetiology and solutions for neonatal j.undice in a missionary hospital in Abeokuta, Southwestern Nigeria. Methods: Consecutive consenting babies diagnosed with significant neonatal j.undice were studied between j.ly 2016 and j.ne 2019. Institutional ethical consent was obtained. A proforma was used to obtain socio-demographic data and other relevant information such as age, sex, birthweight, gestational age and history regarding the j.undice. All the information obtained was inputted into a computer and analysed with SPSS version 16. Results: A total of 179 babies with neonatal j.undice comprising of 120 (67.0%) boys and 59 (33.0%) girls with ages ranging between 1 and 12 days (mean 2.7 ± 2.9) were studied. Prematurity, ABO incompatibility, neonatal sepsis and glucose-6-phosphate enzyme deficiency accounted for over 80% of the causes of significant NNj. Sixty (33.5%) of the 179 babies studied developed acute bilirubin encephalopathy and 11 (6.1%) mortalities were recorded. Higher proportions of babies that were out-born with spontaneous vaginal delivery modes had acute bilirubin encephalopathy (p j.undice is still a significant cause of morbidity and mortality in the neonatal age group. Maternal education is key to good outcome in neonatal j.undice.

关键词： j.undice Neonates Bilirubinaemia Encephalopathy and Outcomes

Evaluating for unrecognized deficits in perimetry associated with functional upper eyelid malposition

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Advances in Ophthalmology Practice and Research 2024年第1期4卷 39-44页

作者： Linyan Wang Davin C.Ashraf Michael Deiner Oluwatobi O.idowu Seanna R.Grob Bryan j.Winn M Reza Vagefi Robert C.Kersten Department of Ophthalmology The Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina Department of Ophthalmology University of CaliforniaSan FranciscoUSA Department of Ophthalmology Oregon Health and Science UniversityPortlandUSA Department of Ophthalmology Tufts Medical CenterBostonUSA Department of Ophthalmology University of UtahSalt Lake CityUtahUSA

Obj.ctive:To investigate whether functional upper eyelid malposition is associated with unrecognized deficits in automated perimetry among glaucoma patients by examining patients undergoing eyelid surgery who had not been identified as requiring eyelid taping during glaucoma field ***:In this retrospective pre-post study,an automated database search followed by manual chart review was used to identify eligible patients from j.nuary 2012 to March *** patients had reliable visual field testing within two years before and after functional upper blepharoplasty or ptosis repair and no comorbid ocular *** part of routine practice,glaucoma visual field technicians taped patients with pupil-obstructing eyelid malposition;taped examinations were excluded from *** and demographic characteristics,mean deviation,and pattern standard deviation were evaluated within a two year period before and after eyelid ***:The final analysis included 60 eyes of 38 *** in visual field parameters after eyelid surgery did not reach statistical significance in crude or adj.sted *** patients with ptosis,the margin reflex distance-1 was not associated with change in mean deviation after surgery(Pearson R2=0.0061;P=0.700).Five of 17 eyes excluded from analysis due to unreliable pre-operative visual fields demonstrated substantial improvement after ***:Functional upper eyelid malposition does not appear to cause spurious visual field abnormalities among glaucoma patients with reliable visual fields who were determined not to require eyelid taping at the time of their visual *** visual fields could be a sign of eyelid interference in this population.

关键词： Visual field Ptosis Dermatochalasis Glaucoma Perimetry Visually significant

COVID-19 Vaccination Uptake and Associated Factors in Selected Communities in Two Southwestern States in Nigeria

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Advances in Infectious Diseases 2024年第1期14卷 260-278页

作者： Oluseye Ayodele Aj.yi Olabanj. Okunlola Ogunsola Aj.bola idowu Oluwaseun Kikelomo Aj.yi Kucheli Wudiri Rita Asoka-Ikechukwu Prosper Okonkwo APIN Public Health Initiatives Abuja Nigeria Department of Community Medicine Bowen University Teaching Hospital Ogbomosho Nigeria Department of Community Medicine University College Hospital Ibadan Nigeria

Introduction: COVID-19 vaccine uptake and acceptance have been a maj.r global concern due to the prevalent misinformation and disinformation that has characterized the vaccine rollout worldwide. This study aimed to assess COVID-19 vaccine uptake and acceptance, and associated factors among selected community members in two states in southwestern Nigeria. Method: We conducted a cross-sectional study using a multistage sampling technique. Fifty catchment settlements of 10 health facilities in each of Oyo and Ogun States targeted for a COVID-19 infection prevention and control intervention were randomly selected. Four households were targeted per settlement. All households that refused access were replaced, to ensure a minimum of four households randomly selected per settlement. The primary household decision-maker was interviewed in each household. Information elicited included respondents’ sociodemographic characteristics, health history, knowledge, risk and benefit perception about the COVID-19 vaccine, vaccine uptake, and willingness to be vaccinated. The study was conducted from j.ly–August 2021. Data were analyzed using SPSS IBM version 23. Result: Four hundred household decision-makers were surveyed in Oyo and Ogun states, after replacement. The mean age of the respondents was 43.0 ± 11.0 years. The maj.rity, 346 (86.5%) had heard about COVID-19 vaccination, but only 47 (13.6%) had received a COVID-19 vaccination. Of the 299 respondents who reported not receiving a COVID-19 vaccination, 166 (55.5%) were willing to be vaccinated. In univariate analysis, respondents who were female had tertiary education, perceived that COVID-19 vaccines are free and accessible, perceived that COVID-19 vaccines have minimal side effects, and perceived higher benefits of COVID-19 vaccination had higher odds of being vaccinated. In contrast, younger respondents, respondents with higher knowledge scores on COVID-19 preventive measures, and with chronic illness had lower likelihoods

关键词： COVID-19 Vaccination Vaccine Vaccine Uptake

Congenital Bilateral Proximal Radio-Ulnar Synostosis in a Nigerian Child

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Open j.urnal of Pediatrics 2024年第1期14卷 101-107页

作者： Alabi Ayobami Oyetunj. j.el-Medewase Victor idowu Olalere Ayankemi Adenike j.el Iretiayo Titilolu Sayomi Bukola Adetutu Oladibu Olanike Taiye Adetoye Mayowa Mary Ashaolu Oluwakayode j.seph Department of Paediatrics and Child Health Ladoke Akintola University of Technology Ogbomoso Nigeria Department of Radiology Ladoke Akintola University of Technology Ogbomoso Nigeria Department of Radiology University College Hospital Ibadan Nigeria Department of Paediatrics and Child Health LAUTECH Teaching Hospital Ogbomoso Nigeria

Congenital radio-ulnar synostosis (CRUS) is a rare skeletal malformation of the upper limb and the most common congenital functional disorder of the elbow j.int, causing limitation in forearm rotational movements, which may lead to difficulties with some activities of daily living. We reported a 4-year-old girl with congenital bilateral proximal radio-ulnar synostosis who presented with functional discomfort due to limitation of the prono-supination movements of the forearms and abnormal gestures when handling obj.cts. She has clinical and radiological features of congenital radio-ulnar synostosis (CRUS). However, the parents declined corrective surgery because of wrong perception of the condition to be normal. This case highlighted the poor health seeking behavior and wrong illness perception prevalent in the developing countries.

关键词： Congenital Radio-Ulnar Synostosis Upper Limb Congenital Anomalies Pro-no-Supination

Enhancing Private Healthcare Effectiveness in Lagos State, Nigeria: An Overview of the Effect of Quality Improvement Initiatives and Implications for Sustainable Healthcare Delivery

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Health 2024年第2期16卷 93-104页

作者： Nnenna Mba-Oduwusi Ifesinachi Eze Tochukwu Osuj. Maxwell Obubu Tolulope Oyekanmi Oluwatosin Kolade Ozioma Oguguah j.ne Martins Nkata Chuku Alozie Ananaba Rodio Diallo Firdausi Umar Sadiq Emmanuella Zamba Abiola idowu InSiGHt Health Consulting Limited Ikeja Nigeria Health Systems Consult Limited Abuja Nigeria Bill & Melinda Gates Foundation Abuja Nigeria Lagos State Health Management Agency (LASHMA) Lagos Nigeria Health Facility Monitoring and Accreditation Agency (HEFAMAA) Ikeja Nigeria

Background: Nigeria, a nation grappling with rapid population growth, economic intricacies, and complex healthcare challenges, particularly in Lagos State, the economic hub and most populous state, faces the challenge of ensuring quality healthcare access. The overview of the effect of quality improvement initiatives in this paper focuses on private healthcare providers in Lagos State, Nigeria. The study assesses the impact of donor-funded quality improvement proj.cts on these private healthcare facilities. It explores the level of participation, perceived support, and tangible effects of the initiatives on healthcare delivery within private healthcare facilities. It also examines how these initiatives influence patient inflow and facility ratings, and bring about additional benefits and improvements, provides insights into the challenges faced by private healthcare providers in implementing quality improvement proj.cts and elicits recommendations for improving the effectiveness of such initiatives. Methods: Qualitative research design was employed for in-depth exploration, utilizing semi-structured interviews. Private healthcare providers in Lagos involved in the SP4FP Quality Improvement Proj.ct were purposively sampled for diversity. Face-to-face interviews elicited insights into participation, perceived support, and proj.ct effects. Questions covered participation levels, support perception, changes observed, challenges faced, and recommendations. Thematic analysis identified recurring themes from interview transcripts. Adherence to ethical guidelines ensured participant confidentiality and informed consent. Results: Respondents affirmed active involvement in the SP4FP Quality Improvement Proj.ct, echoing literature emphasizing private-sector collaboration with the public sector. While acknowledging positive influences on facility ratings, respondents highlighted challenges within the broader Nigerian healthcare landscape affecting patient numbers. Respondents c

关键词： Private Healthcare Quality Improvement Proj.cts Donor-Funded Initiatives Healthcare Delivery Lagos State Nigeria

Germination: an alternative source to promote phytonutrients in edible seeds

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Food Quality and Safety 2020年第3期4卷 129-133页

作者： Anthony Temitope idowu Oladipupo Odunayo Olatunde Ademola Ezekiel Adekoya Solomon idowu Department of Food Technology Faculty of Agro-IndustryPrince of Songkhla UniversityHatyaiSongkhla Province90110Thailand Department of Thai Traditional Medicine Prince of Songkla UniversityHat YaiSongkhla ProvinceThailand Department of Community Health and Primary Healthcare College of Medicine of the University of LagosLagos stateNigeria

Consumption of less phytonutrient foods has shown to cause different chronic diseases,despite over 50,000 edible plant breed available in various countries around the *** edible plants consist of seeds that can be consumed which possessed high health ***,nutritive values such as phytochemicals of edible seeds increased after ***,germination has been reported to enhance various bioactive compounds such asγ-amino butyric acid,polyphenols,and vitamins which lead to greater bioactivity such as anti-diabetic,anti-bacteria,and anti-cancer effects when these seeds are ***,germination can be regarded as a cheap and effective way to enhance the nutritional value of edible seeds.

关键词： edible seeds water bioactive compounds germination phytonutrients

Relativistic treatment of the spin-zero particles subj.ct to the second Pschl Teller-like potential

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Chinese Physics B 2013年第10期22卷 101-106页

作者： Ekele V.Aguda Amos S.idowu Department of Mathematics Ahmadu Bello University ZariaNigeria Department of Mathematics University of IlorinNigeria

The three-dimensional Klein-Gordon equation is solved for the case of equal vector and scalar second Poschl-Teller potential by proper approximation of the centrifugal term within the framework of the asymptotic iteration method. Energy eigenvalues and the corresponding wave function are obtained analytically. Eigenvalues are computed numerically for some values of n and It is found that the results are in good agreement with the findings of other methods for short-range potential.

关键词： second P6schl-Teller potential asymptotic iteration eigenvalues eigenfunction

Anti-Corrosion and Tribo-Mechanical Properties of Co-deposited Zn–SnO_2 Composite Coating

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Acta Metallurgica Sinica(English Letters) 2015年第4期28卷 521-530页

作者： Oj. Sunday Isaac Fayomi Abimbola Patricia idowu Popoola Department of Chemical Metallurgical and Materials EngineeringTshwane University of Technology Department of Mechanical Engineering Covenant University

Zn-SnO2 composite coatings were prepared by direct potential using electrolytic co-deposition technique from sulfate solution. The effect of Zn2＋ and SnO2 concentrations in deposited bath on the mechanical properties and mor- phological characteristics of the composite coatings were examined. The characterizations of the sample were analyzed using scanning electron microscopy couple with energy dispersive spectroscopy （SEM/EDS）, X-ray diffraction （XRD） and atomic force microscopy （AFM）. The electrochemical degradation behavior of the samples in 3.65 wt.% NaCl solution was studied using potentiodynamic polarization technique and characterized by high-resolution optical microscope. From all the fabricated composite coatings, obvious diffraction peaks were observed with Zn-7Sn-S-0.3V film with Zn2Sn7, Sn, Zn2Sn5 and Zn phases, confirming the presence and formation of Zn-SnO2 coating. The XRD pattern shows that the presences of SnO2 particle remarkably play a maj.r role in the precipitation and orientation of the alloy matrix. From the SEM/EDS and AFM results, the deposits show that composite particle and proper bath composition have strong influence on the microstructure. An enhanced corrosion resistance was attained as a result of the induced particles.

关键词： Metal matrix composite Co-deposition Mechanical property Corrosion resistance