The Effect of Hydration on the Structure and Transport Properties of Confined Carbon Dioxide and Methane in Calcite Nanopores

With increasing interest in using or displacing confined water for CH4 recovery or CO2 storage in nanoporous environments, understanding the organization and diffusion of gases is confined water environments is essential. In this study, the effect of hydration on the structure and diffusivity of confined carbon dioxide (CO2) and methane (CH4) in 2 nm slit-shaped calcite nanopore was studied using classical molecular dynamics simulations. The absence of confined water and the effect of different water concentrations including one layer of confined water composed of 150 water molecules, 500 water molecules, and 1,296 water molecules that correspond to the density of bulk water of 1 g/cm3 on the structural arrangement and diffusivity of confined CO2 and CH4 were investigated. Water molecules were found to influence the anisotropic distribution and mobility of confined CO2 and CH4 significantly by altering the structures of the adsorbed gas layers onto the calcite surfaces. The preferential adsorption of water on calcite surface over CO2 and CH4 resulted in the displacement of the adsorbed gas molecules toward the center of the pore. This water-induced displacement impacts the diffusivity of the confined gases by enabling transport through the center of the pore where there are fewer intermolecular collisions and less steric hindrance for transporting the molecules. Therefore, the diffusivity of CO2 and CH4 is higher in the presence of a single water layer as opposed to in pores without water. Energetic calculations showed that van der Waals and electrostatic interactions contributed to the affinity of CO2 for calcite surfaces, while van der Waals interactions dominate CH4 interactions with calcite and the surrounding water molecules. The anisotropic variations in the diffusivities of confined fluids emerge from changes in the organization of confined fluids and potential differences in the free energy distributions as a function of the orientation of the calcite surface. These findings suggest that any efforts to potentially engineer the nano-scale pore environment in calcite for enhanced gas recovery or storage will require us to consider the organization and anisotropic transport behaviors of confined fluids

Improve a secure blind watermarking technique for digital video

In recent years, digital watermark video has become increasingly popular in a range of industries, but because it is widely available on the Internet, it is simple to make unlawful copies and tamper with digital video. Watermarking digital video has become more popular as a method of detecting changes and preventing illegal duplication. This paper presents a video copyright protection system that is secure, blind, and robust. Two approaches that are resistant to diverse attacks are proposed in this research. The initial step is to encrypt a hybrid watermark (Message, Image) using two different encryption techniques (RSA and AES).The second is a steganography technique based on LSB-based robust watermarking, which embeds an encrypted secret bit Message and Image in key frames of an MP4 video file by utilizing the mean of the grayscale images that differ and take the most significant differences between the two images. The intensity of the histogram will become more consistent across all pixels as the encryption quality improves. For keyframe watermarking in the spatial domain, the proposed methods can maintain the watermarked information while achieving high imperceptibility and a Peak Single to Noise Ratio [PSNR] equivalent to more than 50 db, where quality measures (MSE, PSNR, and correlation coefficient) that calculate the levels of distortion caused by embedding a watermark in digital video produce good results

ENLARGE THE HEAT TRANSFER RATE OF AC EVAPORATOR WITH DIVERSE MATERIALS

The azeotropic combination of R30 & R160 is made with R160 concentrations of zero%, 20%, 40%, 60%, eighty% and a hundred% in R30 and its miles applied in a Refrigeration unit with superb go together with the go with the waft costs via solving the alternative input parameters ordinary. Both the analytical warmth transfer charges and experimental warmness transfer costs at particular go along with the go along with the glide fees are showing identical outcomes with little deviation.  The values are compared to get a smooth photograph of the warmth switch fees at extremely good go with the float prices. In this thesis the evaluation it is recounted that better flow charges of the refrigerant combination increase the warmth switch rates but inside the fee of better art work intake an first rate way to have an impact at the coefficient of overall performance of the refrigerant unit which isn't always beneficial to apply because of the truth the art work usage of the exquisite refrigeration unit ought to be lesser for unit of refrigeration. CFD evaluation to decide the warm temperature switch coefficient, mass go with the float rate, warmth switch charge, pressure drop and tempo at high-quality mass go with the flow prices (1, 1.5 &2kg/s)

Knowledge about anesthesia and the role of anesthesiologists among Jeddah citizens

Background: The anesthesiologist has a vital role in the operating theatres. Awareness of the role of the anesthesiologist and the types of anesthesia is essential for every person. This study was made to estimate how much information the general population have about the anesthesiologist and the different types of anesthesia.Methods: This research was a cross sectional non-interventional study. The research team conducted a questionnaire in which each participant in the study was interviewed by the research team. The sample size was 159 participants.Results: From the participants,99 (62.2%) recognized the anesthesiologist as a specialized doctor who administers the anesthetics,62 (38.9%) know that the anesthesiologist has a role in resuscitating the patient with the team if crises occurred. However, 85 (53.4%) believe that the surgeon has the responsibility of postoperative pain management. Physicians were the source of knowledge for most participant’s information.Conclusions: A reasonable percentage of people appreciated the role of the anesthesiologist in administrating the anesthesia, however there is a lack of information about the role of the anesthesiologist intra and postoperatively. The need for more education for people about anesthesia is essential as the amount of information about anesthesia in general is rather low

On Time-Dependent Rheology of Sutterby Nanofluid Transport across a Rotating Cone with Anisotropic Slip Constraints and Bioconvection

The purpose and novelty of our study include the scrutinization of the unsteady flow and heat characteristics of the unsteady Sutterby nano-fluid flow across an elongated cone using slip boundary conditions. The bioconvection of gyrotactic micro-organisms, Cattaneo-Christov, and thermal radiative fluxes with magnetic fields are significant physical aspects of the study. Anisotropic constraints on the cone surface are taken into account. The leading formulation is transmuted into ordinary differential formate via similarity functions. Five coupled equations with nonlinear terms are resolved numerically through the utilization of a MATLAB code for the Runge-Kutta procedure. The parameters of buoyancy ratio, the porosity of medium, and bioconvection Rayleigh number decrease x-direction velocity. The slip parameter retard y-direction velocity. The temperature for Sutterby fluids is at a hotter level, but its velocity is vividly slower compared to those of nanofluids. The temperature profile improves directly with thermophoresis, v-velocity slip, and random motion of nanoentities. 2022 by the authors.This research was supported by Taif University, Researchers Supporting Project Number (TURSP-2020/217), Taif University, Taif, Saudi Arabia. Open Access funding provided by the Qatar National Library.Scopu

Heat Stroke in Emergency Department: Diagnosis and Management

Background: Heat stroke is a severe health concern with the potential for multi-organ failure, necessitating rapid and effective management. With rising global temperatures, there is increasing concern regarding the vulnerability of populations in high-heat areas, notably in Saudi Arabia, especially during the annual Hajj pilgrimage. Objective: This paper aims to review the epidemiology, evaluation and management techniques of heat stroke, emphasizing the situation during Hajj pilgrimages in Saudi Arabia, and to outline the best practices for emergency management. Methodology: A comprehensive review of literature and studies related to heat stroke, both globally and specific to Saudi Arabia, was undertaken. An in-depth analysis of emergency management, including initial assessment, cooling methods, organ support, medication, and prevention strategies, was conducted. Results: Heat stroke remains a significant cause of emergency department visits, with specific groups, such as men and the elderly, being more susceptible. During the Hajj in 2016, 267 patients were diagnosed with heat-related illnesses, with heatstroke accounting for 29% of these cases. With the threat of global warming, studies indicate a potential tenfold increase in heat stroke risk with a 2°C rise in temperatures. Swift and comprehensive cooling is pivotal for recovery. Management emphasizes rapid recognition, assessment, and varied cooling methods, along with targeted treatments for organ dysfunctions. Prevention strategies play a vital role, given the higher efficacy and practicality over treating organ dysfunctions. Conclusion: Heat stroke is a pressing health challenge, particularly in high-risk environments like Saudi Arabia during the Hajj pilgrimage. While effective emergency management protocols exist, an emphasis on prevention is crucial. It is imperative to incorporate a comprehensive approach to address both the immediate threat and long-term risks of heat stroke, especially with the looming challenge of global warming

Association between COVID-19 preventive behavioral changes and anxiety in Karachi, Pakistan: A cross-sectional pilot study

Background: COVID-19 has turned into emergent psychological impacts across cohorts with devastating consequences related to preventive measures. Health organizations recommended some preventive measures (e.g., wearing masks, frequent handwashing, etc.) to overcome the COVID-19 pandemic. However, performing these behaviors may increase anxiety among populations. Thus, the present study aimed to investigate the role of behavioral changes to prevent COVID-19 infection and anxiety during the COVID-19 pandemic in Pakistan. Subjects and methods: The present cross-sectional study was conducted for 10 days during July 2020 among the general public of Karachi after the imposition of lockdown amid the COVID-19 pandemic, with a sample size of 331 participants. The questionnaire consisted of three parts i.e., (i) socio-demographics, (ii) perception and preventive behaviors towards COVID-19, and (iii) anxiety-related questions using the Urdu Generalized Anxiety Disorder (GAD-7). The data was analyzed using logistic regression to investigate the association between behavior change and anxiety. Results: Almost half of the participants (i.e., 48.9%) reported being anxious. Although most of the participants were compliant with preventive behavioral changes in their daily lives but no associations between preventive behaviors and anxiety were found. There were significant associations between anxiety and some of the sociodemographic variables (i.e., gender: females were more anxious; age group and marital status single participants were more anxious). Conclusion: Based on the present findings, it is clearly evident that Pakistani people are suffering psychiatric problems during the COVID-19 pandemic. Hence, appropriate initiatives should be adopted as soon as possible. Besides, COVID-19 related preventive behavioral measures are highly recommended to practice without putting anything back for psychological fears

Comparative analysis of neutrophil to lymphocyte ratio and derived neutrophil to lymphocyte ratio with respect to outcomes of in-hospital coronavirus disease 2019 patients: A retrospective study

Introduction and objectivesIn patients with coronavirus disease 2019 (COVID-19), several abnormal hematological biomarkers have been reported. The current study aimed to find out the association of neutrophil to lymphocyte ratio (NLR) and derived NLR (dNLR) with COVID-19. The objective was to compare the accuracy of both of these markers in predicting the severity of the disease.Materials and methodsThe study was conducted in a single-center having patients with COVID-19 with a considerable hospital stay. NLR is easily calculated by dividing the absolute neutrophil count (ANC) with the absolute lymphocyte count (ALC) {ANC/ALC}, while dNLR is calculated by ANC divided by total leukocyte count minus ANC {ANC/(WBC-ANC)}. Medians and interquartile ranges (IQR) were represented by box plots. Multivariable logistic regression was performed obtaining an odds ratio (OR), 95% CI, and further adjusted to discover the independent predictors and risk factors associated with elevated NLR and dNLR.ResultsA total of 1,000 patients with COVID-19 were included. The baseline NLR and dNLR were 5.00 (2.91–10.46) and 4.00 (2.33–6.14), respectively. A cut-off value of 4.23 for NLR and 2.63 for dNLR were set by receiver operating characteristic (ROC) analysis. Significant associations of NLR were obtained by binary logistic regression for dependent outcome variables as ICU stay (p < 0.001), death (p < 0.001), and invasive ventilation (p < 0.001) while that of dNLR with ICU stay (p = 0.002), death (p < 0.001), and invasive ventilation (p = 0.002) on multivariate analysis when adjusted for age, gender, and a wave of pandemics. Moreover, the indices were found correlating with other inflammatory markers such as C-reactive protein (CRP), D-dimer, and procalcitonin (PCT).ConclusionBoth markers are equally reliable and sensitive for predicting in-hospital outcomes of patients with COVID-19. Early detection and predictive analysis of these markers can allow physicians to risk assessment and prompt management of these patients

What shape do UK trainees want their training to be? Results of a cross-sectional study

OBJECTIVES: The British Government is acting on recommendations to overhaul postgraduate training to meet the needs of the changing population, to produce generalist doctors undergoing shorter broad-based training (Greenaway Review). Only 45 doctors in training were involved in the consultation process. This study aims to obtain a focused perspective on the proposed reforms by doctors in training from across specialities. DESIGN: Prospective, questionnaire-based cross-sectional study. SETTING/PARTICIPANTS: Following validation, a 31-item electronic questionnaire was distributed via trainee organisations and Postgraduate Local Education and Training Board (LETB) mailing lists. Throughout the 10-week study period, the survey was publicised on several social media platforms. RESULTS: Of the 3603 demographically representative respondents, 69% knew about proposed changes. Of the respondents, 73% expressed a desire to specialise, with 54% keen to provide general emergency cover. A small proportion (12%) stated that current training pathway length is too long, although 86% felt that it is impossible to achieve independent practitioner-level proficiency in a shorter period of time than is currently required. Opinions regarding credentialing were mixed, but tended towards disagreement. The vast majority (97%) felt credentialing should not be funded by doctors in training. Respondents preferred longer placement lengths with increasing career progression. Doctors in training value early generalised training (65%), with suggestions for further improvement. CONCLUSIONS: This is the first large-scale cross-specialty study regarding the Shape of Training Review. Although there are recommendations which trainees support, it is clear that one size does not fit all. Most trainees are keen to provide a specialist service on an emergency generalist background. Credentialing is a contentious issue; however, we believe removing aspects from curricula into post-Certificate of Completion of Training (CCT) credentialing programmes with shortened specialty training routes only degrades the current consultant expertise, and does not serve the population. Educational needs, not political winds, should drive changes in postgraduate medical education and all stakeholders should be involved

Prevalence of Bipolar Disorder and Associated Risk Factors Among Population in Western Region Of Saudi Arabia: A Cross-Sectional Study

Objective: To determine the prevalence of bipolar disorder and associated risk factors among the population in the Western Region, KSA. Methods:This research will employ a cross-sectional study design. Cross-sectional studies are well-suited for assessing the prevalence and risk factors of a particular condition in a specific population at a single point in time. This design will allow us to gather data on the prevalence of bipolar disorder and identify associated risk factors among the population in the Western region of Saudi Arabia. Results: The study included 407 participants. The most frequent weight among them was 51-65 kg (n= 109, 26.8%), followed by 66-75 kg (n= 93, 22.9%). The most frequent height among study participants was 1.61-1.70 m (n= 137, 33.7%) followed by 1.51-1.60 m (n= 128, 31.4%). The most frequent body mass index value was 18.5-24.9 kg/m2 (n= 161, 39.6%), followed by 25-29.9 kg/m2 (n= 142, 34.9%). The gender of study participants is almost equal with male (n= 204, 50.1%) and female (n= 203, 49.9%). The most frequent age among them was 62 years and above (n= 157, 38.6%), followed by 40-50 years (n= 92, 22.6%). Participants were asked the participants about what is the duration of their mental illness(bipolar). The most frequent answer was nothing (n=277,68.1%), followed by one year (n=96, 23.6%), and the least of them were six years (n=1,0.2%). Conclusion: The results showed that most of the study participants are married and intermediate owners and most of them have a university education. Most participants are not overweight according to their body's bodies. Most of the study participants had a good social link