COVID-19 Vaccine Acceptance among Ajman Undergraduate Dental Students: A Cross-Sectional Study.

BACKGROUND Achieving widespread coronavirus disease 2019 (COVID-19) vaccination is crucial in controlling the pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This cross-sectional study aimed to identify factors associated with the willingness of dental medicine students to receive the COVID-19 vaccine. OBJECTIVES The study sought to assess the knowledge, attitudes, and behaviors of undergraduate dental students toward COVID-19 vaccines and to identify determinants, motivators, and barriers to vaccine uptake and booster receipt. METHODS A web-based survey was distributed to all 882 undergraduate dental surgery students in January 2022, and 70.7% of the students responded. The survey used χ2 tests and logistic regression analysis to examine the association among the variables. The significance level was set at α = 0.05. RESULTS Most participants (72.4%) reported having adequate knowledge of COVID-19. The vaccine acceptance rate was higher among male and older trainees, with no significant difference compared to women and younger trainees with no significant difference (p = 0.849). Acceptance of the vaccine varied according to study level (5-year program), ranging from 44.8% to 73.0%, in the following order 4th > 1st > 3rd > 5th > 2nd year. Social media (76.8%), government websites (66.5%), and family and friends (57.2%) were the main sources of COVID-19-related information. Among hesitant and unwilling participants, the main concerns were side effects (34.0%) and lack of understanding about the vaccine's mechanism (67.3%). CONCLUSIONS Ajman dental students had moderate knowledge of COVID-19 and obtained information mainly from social media, government websites, and family and friends. Age, sex, and study year influenced vaccine acceptance. The main reasons for refusal were lack of knowledge, fear of side effects, and complications. Education campaigns are needed to increase vaccine acceptance among dental students

Undiagnosed endometrial abnormalities in women with normal hysterosalpingography scheduled for IVF: prospective evaluation of three-dimensional transvaginal ultrasound versus office hysteroscopy

Objectives: To compare the diagnostic accuracy of three-dimensional transvaginal ultrasound (3D-US) to office hysteroscopy (OH) in the screening of uterine cavity with normal hysterosalpingography (HSG) findings for subtle endometrial abnormalities before in vitro-fertilization (IVF). Methods: A prospective cohort cost-modeling study was carried out in a University hospital. We included 120 infertile women with a normal uterine cavity on HSG scheduled for IVF. All cases were evaluated by 3D-US, and the results were compared with OH findings. Results: OH revealed cavitary endometrial lesions (CLs) in thirty-four women (28.3%). Endometrial polyps were the most common detected lesions (16, 47.1%). 3D-US had 88.2% sensitivity, 96.5% specificity, 90.9% positive predictive value, 95.4% negative predictive value, and 94.2% overall accuracy for CLs. The overall agreement between 3D-US and OH was near-perfect (κ=0.86, 95% CI=0.75-0.96). Irregular menstrual bleeds and prior endometrial procedures were significant predictors for CLs (aOR=24.96, 95% CI=2.71–230.04, P=0.005, aOR=9.16, 95% CI=2.13–39.3, P=0.002, respectively). A selective screening strategy discerning OH to women with these predictors and/or women with abnormal 2D-US would have an NPV of 92.8 % with substantial cost benefits. Conclusions: In the pre-IVF work up, 3D-US, a non-invasive imaging modality, seems to be nearly comparable to OH. Office hysteroscopy screening prioritizing women with abnormal 2D-US, irregular menstrual periods and/or prior endometrial traumatization could yield a satisfactory cost-effective approach for identifying endometrial lesions

Study of prompt and secondary D meson decay with the ALICE experiment

From Monday 30 th June to Friday 22 nd August, 2014, I attended the CERN summer student training program 2014. The program introduces various useful knowledge, culture exchanges and scientific skills to my experiences. I attend in the mornings lectures, especially on theoretical topics. Furthermore, I gained fruitful skills on computational methods, concretely ROOT/AliROOT and C++ Language. I have been guided to most of experiments and detectors including ALICE, CMS and ATLAS detectors and I have also attended different workshops. A major source of uncertainty in the analysis is the unknown fraction of secondary D0 mesons coming from b-hadron decays, which has been estimated on the basis of perturbative QCD predictions and a range of hypotheses for the b-hadron nuclear modification factor is estimate. The project consists in studying whether topological variables sensitive to displacement with respect to the primary vertex, larger for secondary D–mesons, can be used to extract the fraction of D mesons from b-hadron decays in a data driven method and specify only pPb since the work is only for pPb collisions. In particular, the selection cuts were studied to compute the raw signal of D mesons with an invariant mass analysis. Selection and reconstruction efficiencies were considered with the detector acceptance, to correct for experimental effects by using a Monte Carlo simulation (MC). We applied different cuts of normalized decay length L xy and points angle θ xy , to study the effect of these cuts on the invariant mass spectra and efficiencie

Just-world beliefs are associated with influenza vaccine intake intent in the United Arab Emirates: a cross-sectional study

Abstract Although not a prime public health concern, seasonal influenza remains a challenge in the United Arab Emirates (UAE). This problem is augmented by the fact that the percentage of the population intending to take the yearly seasonal influenza vaccine is relatively low. The purpose of this study is to assess if vaccine knowledge and just-world beliefs have an impact on willingness to receive the seasonal influenza vaccine. The methodology relies on a multivariable logistic regression analysis establishing predictors of vaccine intake intent and parametric tests comparing variables across gender and ethnicity. Results come out showing that vaccine knowledge is not a significant predictor of seasonal influenza vaccine intake intent. However, general belief in the just world is a significant predictor of vaccine intake intent. This has important implications for the role of religion in curbing seasonal influenza vaccine hesitancy in the UAE. Given that just-world beliefs are linked to religiosity, public health authorities need to consider relying on religious leaders to exhort the faithful to take the vaccines by framing their exhortations in the context of just-world beliefs

Rapidly developing myomatous erythrocytosis syndrome: a case report

Myomatous erythrocytosis syndrome is polycythaemia associated with uterine leiomyoma, a rare condition known for over five decades with unclear aetiology. The present case is a 51-year-old Caucasian woman who presented with urinary retention and anaemia secondary to multiple uterine fibroids and menorrhagia 5 years following uterine artery embolisation. She opted for abdominal hysterectomy but preoperatively was found to be polycythaemic with haemoglobin of 23 g% and raised serum erythropoietin requiring serial venesections. At a year postoperatively she maintains normal haemoglobin and serum erythropoietin levels. Ectopic production of erythropoietin by fibroids is the most favoured aetiopathogenesis in this case. However, the rapid transition from anaemia to polycythaemia in 5 months is a striking feature as fibroid-linked polycythaemia has so far been reported on presentation. Vigilance is crucial in excluding polycythaemia while such patients are on waiting list as there is a risk of thromboembolism, which is further increased by surgery

Performance Investigation of Evacuated Tube Collector using Different Nano fluids Applied to Winter Climatic Conditions in Egypt

In this paper, the performance of the evacuated tube solar collector is investigated theoretically by the TRNSYS program. The simulation is conducted during the winter of 14th February-2019 in Cairo – Egypt. In this simulation, water and Nanofluids areworking fluids. The types of Nanofluids are CeO2/water, WO3/water and AL2O3/water. The simulation is conducted at0.015%,0.025%, 0.035% and 0.045% (volume concentrations).The mass flux rate and tilt angle are 0.017 kg/s.m2and 45o; respectively.The results show that the collector has the highest performance using nanofluids at studied concentrations. At 12:00 PM, thehighest useful energy gain can be obtained from CeO2/water Nanofluid at 0.045% concentration, while thermal efficiency ishigher by 34.2% than water. The nanofluidWO3/water presents low performance than that of CeO2/water and AL2O3/water. The thermal efficiencies ofAL2O3/ water and WO3/ water Nanofluids are higher than water by 28.4% and 12.5%; respectively, atconcentration of 0.045% and 12:00P

The role of muscle ultrasound in helping the clinical diagnosis of muscle diseases

Abstract Background Selective involvement of certain muscles is an indicator for muscle diseases and helps to direct the diagnosis, but in some cases, it cannot be detected clinically; hence, the roles of muscle MRI and ultrasound are to detect this selectivity and facilitate the diagnosis. Objectives The possibility of using muscle ultrasound as a screening tool when muscle diseases are suspected and as an alternative to MRI. Subjects and methods This cross-sectional descriptive study included 38 patients presented with clinical manifestations suggestive of muscle diseases. The patients were selected over a period of 1 year. All patients were subjected to thorough clinical assessment and muscle ultrasound of the thigh and leg for all patients, while 15 were subjected to MRI. Clinical and radiological assessments were performed separately, followed by both clinical and radiological findings to assess the power of combining the clinical and radiological assessments for the diagnosis of muscle diseases. Results The clinical assessment reached a main provisional probable diagnosis in 53% cases, and radiological assessment blind to clinical data suggested diagnosis in 18 of the total cases, while the combination of both ultrasound and MRI could suggest diagnosis in 87% of the cases. The concordance ratio of ultrasound to MRI ranged between 78 and 100%. Conclusion The combination of clinical and radiological assessments of muscle diseases can suggest a main provisional probable diagnosis, especially when genetic diagnosis is not accessible, or to direct the genetic testing when it is available. Ultrasound can be used as a routine tool in screening and follow-up of muscle diseases

Metal-Nails Waste and Steel Slag Aggregate as Alternative and Eco-Friendly Radiation Shielding Composites

Metal waste recycling has become a global requirement owing to its environmental benefits and powerful economic activity. Metal nail waste (MNW) is a byproduct of metal nail manufacture. MNW has an equal size, contains a high ratio of iron, and has a high specific gravity comparable to normal aggregate. We present MNW recycling as a partial replacement for fine aggregates and electric arc furnace steel slag (EAFSS) as coarse aggregates to produce sustainable heavyweight concrete (HWC). Our main research aim was to study the radiation shielding and mechanical properties of sustainable HWC by partially replacing MNW with 10, 20, 30, and 40% sand. EAFSS is a coarse aggregate for 60% of the total volume. Fresh and hardened properties of HWC are presented. Furthermore, we analysed the internal structure of HWC mixes using a scanning electron microscope. Our results showed the positive effects of MNW on the unit weight of concrete. The density of HWC mixes ranges between 2650 and 3170 kg/m3. In addition, MNW contributes to increasing the compressive strength of concrete mixes with their use of up to 30%. Therefore, the MNW ratios improved the failure behaviour of HWC mixes. The improved linear attenuation coefficient of HWC mixes was due to using MNW ratios and higher densities than the reference mix