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Reservoir fluids properties are very important in reservoir engineering computations such as material balance calculations, well testing analyses, reserve estimates, and numerical reservoir simulations. Isothermal oil compressibility is required in fluid flow problems, extension of fluid properties from values at the bubble point pressure to higher pressures of interest and in material balance calculations (Ramey, Spivey, and McCain). Isothermal oil compressibility is a measure of the fractional change in volume as pressure is changed at constant temperature (McCain). The most accurate method for determining the Isothermal oil compressibility is a laboratory PVT analysis; however, the evaluation of exploratory wells often require an estimate of the fluid behavior prior to obtaining a representative reservoir sample. Also, experimental data is often unavailable.Empirical correlations are often used for these purposes. This paper developed a new mathematical model for calculating undersaturated oil compressibility using 129 experimentally obtained data points from the PVT analyses of 52 bottom hole fluid samples from Mishrif reservoirs in the southern Iraqi oil fields. The new undersaturated oil compressibility correlation developed using Statistical Analysis System (SAS) by applying nonlinear multiple regression method. It was found that the new correlation estimates undersaturated oil compressibility of Mishrif reservoir crudes in the southern Iraqi oil fields much better than the published ones. The average absolute relative error for the developed correlation is 7.16%.

This study examines the vibrations produced by hydropower operations to improve embankment dam safety. This study consists of two parts: In the first part, ANSYS-CFX was used to generate a three-dimensional (3-D) finite volume (FV) model to simulate a vertical Francis turbine unit in the Mosul hydropower plant. The pressure pattern result of the turbine model was transformed into the dam body to show how the turbine unit's operation affects the dam's stability. The upstream reservoir conditions, various flow rates, and fully open inlet gates were considered. In the second part of this study, a 3-D FE Mosul dam model was simulated using an ANSYS program. The operational turbine model's water pressure pattern is conveyed to the dam's turbine-shared zone. The maximal and minimal upstream reservoir water levels were investigated. A control program was created depending on the principle stress model results collected from the operation of the hydropower plant with the minimum principal stress on the dam body. This research suggests an enhanced turbine operating system, reducing stress on the dam body and increasing dam operation life.

The design of an experimental approach, the Box–Behnken design, was implemented to optimize the chromatographic condition to develop a rapid HPLC procedure for quantification of a ternary mixture of metoprolol (MET), telmisartan (TEL), and amlodipine (AML) from the formulation. The perturbation plots, contour, and 3D response surface pictures were developed to study the impact of each variable on the analytes’ retention time and the probable interaction between the parameters with fewer chromatographic runs. The optimized HPLC method separated the three analytes within 5 min with excellent selectivity and peak shape on a Zorbax C18 HPLC column using acetonitrile and phosphate buffer (20 mM, pH 5.8) with isocratic elution at a 1.1 mL/min flowrate. A wavelength 230 nm was utilized to monitor the elute. The validation of proposed method demonstrated a wide linearity range of 10–200 µg/mL for MET and TEL and 5–50 µg/mL for AML along with an excellent correlation coefficient. The correctness of the HPLC approach was further confirmed by excellent recovery of the added amount of analytes utilizing the standard addition technique. The recommended HPLC approach was employed safely for quality assurance of the formulation, because the evaluation of the method’s greenness and whiteness confirmed the environmentally friendly nature of the approach.

Heavy metals create serious health problems, so the practical implementation and development of low-cost sorbent materials to remove heavy metals from the ecosystem is a worldwide issue. The purpose of this study is to find a low-cost ligand that has the potential to adsorb heavy metals from aqueous and soil samples and also has biological potential. For this, a Schiff base, dimeric o-toluidine (SBL), has been synthesized through condensation, characterized by spectroscopic analysis, and had its biological activities measured. We also studied its adsorption efficiency through a batch technique to remove Zn(II), Co(II), and Cu(II) from aqueous and soil samples under different conditions such as metal ion concentration, pH, contact time, and SBL concentration. The adsorption potential of SBL was analyzed by the Langmuir and Freundlich adsorption isotherms. The values of correlation coefficients revealed that the Freundlich isotherm elucidated results that were more appropriable than the Langmuir model. Adsorption equilibrium was established in 90 min for aqueous samples and in 1,440 min for soil samples. For the maximum adsorption of all metals, the optimum pH was 8, and it showed a capacity to remove 77 to 95 percent of metals from the samples. The maximum adsorption capacity (qmax) of SBL were 75.75, 62.50, and 9.17 mg g-1 in the case of Cu(II), Zn(II), and Co(II) ions, respectively, from aqueous samples and 10.95, 64.10, and 88.49 mg g-1 in the case of Zn(II), Cu (II), and Co(II), respectively, from soil samples. The effectiveness of SBL in the sorption of the selected metals was found to be Cu+2 > Zn+2 > Co+2 for aqueous samples and Co+2 > Cu+2 > Zn+2 for soil samples. The antimicrobial activity of SBL was also investigated. The results revealed that SBL showed moderate inhibitory activity against Staphylococcus dysentria, C. albican, and Aspergillus niger, whereas it exhibited weak activity against S. aureus, P. aureginosa, K. pneumoniae, P. vulgaris, and E.coli when compared to Fluconazole and Ciprofloxacin as the standard. Acute toxicity of the synthesized compound was measured through its daily oral administration with various doses ranging from 0.1 to 1,000 mg/kg of the mice’s body weights. Even at the dose of 1,000 mg/kg, the SBL showed no mortality or any type of general behavioral change in the treated mice. Based on preparation cost, metal removal capacity, toxicity, and antimicrobial activities, SBL is an excellent sorbent and should be studied at pilot scale levels.

The snow leopard is one of the highly valued species from high-altitude mountain ecosystems of Central and Southeast Asia, including Pakistan. This keystone species is facing a myriad of conventional and emerging threats, including poaching and trade, that are poorly documented in Pakistan. To understand the dynamics and drivers of the poaching and trading of snow leopards in Pakistan, we investigated the issue in depth through a multifaceted survey in the snow leopard range of the country. We recorded 101 snow leopard poaching incidences from 11 districts during 2005–2017. The reported poaching incidences varied spatially (x̄ = 9 ± 2.6 [95% Cl: 3–15]) and temporally (x̄ = 7.8 ± 1.09) and accounted for 2–4% annual population loss (n = 200–420) in a period of 13 years. Poaching and trade together constituted 89% of the total incidence reported and animals were mostly shot (66%), poisoned (12%), snared (12%) and captured (4%), respectively. Only a fraction (3%) of the incidences were reported to the relevant law enforcement agencies. Trade routes included large cities and neighbouring countries, even the Middle East and Europe. The average base and end prices for each item were 245 ± 36 USD and 1,736 ± 520 USD, respectively, while maximum monetary fines set as per the law were 275 USD. Our results establish the need for developing multi-stakeholder coordination mechanisms at regional, national and international levels and information sharing to curb this menace. Improving the existing laws and surveillance system, while taking the local communities onboard, will further help to this end.

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AbstractIn online gaming, selling virtual game items is a growing phenomenon designed to engage players. Despite growing adoption, little remains known regarding the gamer’s perceived virtual item retail experiences, particularly in the online game retail context. Based on the hedonic consumption perspectives, we examined the role of escapism, role projection, fantasy, enjoyment, emotional involvement, and arousal in developing positive attitudes toward in-game virtual items, which eventually enhanced behavioral outcomes such as game store loyalty, willingness to pay (WTP) and word-of-mouth (WOM). We collected survey data from 281 online gamers and analyzed the data using partial least squares (PLS)-based structural equation modeling. The results indicate that fantasy, escapism, enjoyment, and arousal significantly enhance gamers’ favorable attitudes toward virtual item experiences. Moreover, the findings indicate the positive influence of attitude on players’ WTP, loyalty to retailers, and positive WOM. This study is the first to explore imaginal and emotional experiences as antecedents that derive gamers’ favorable attitudes toward in-game item retail experiences and their subsequent influence on gamers’ consumption behavior. Online game retailers may benefit from focusing on virtual item experiences to elevate premium gamers’ retail attitudes and their ensuing consumption behaviors. [ABSTRACT FROM AUTHOR]

The environment and agricultural output are being challenged by weeds and crops. Innovative advancements in alternative weed control techniques that seek to reduce the need on herbicides have been spurred by the growing demand for sustainable weed control methods. Having weed recognition that is sufficiently successful is a hurdle to the implementation of these methods for selective in-crop application. Deep learning has shown remarkable promise in a variety of vision tasks, leading to the development of several effective image-based weeds and crops identification systems. This study looks at the newest developments in deep learning techniques for pixel-wise semantic segmentation of identifying crops and weeds. The hardest problem is semantic segmentation-based weeds and crops recognition, which needs to be solved for smart farming to work well. The goal is to give each pixel of a picture its own class name. Deep learning for smart farming has a number of useful applications, one of the most important of which is identifying the exact position of crops and weeds on farms. There are already quite complex systems for separating weeds and crops, with millions of factors that need more time to train. To get around these problems, we suggest an AgriResUpNet design based on deep learning. It is a carefully put together mix of the U-Net and residual learning frameworks. To see how well the suggested model works on the crop and weed GitHub dataset in terms of pixel accuracy, precision, f1-sore, and IoU measures. The suggested network is tested and compared with other cutting-edge networks using a crop and weed dataset that is open to the public. Also, the AgriResUpNet model gave an IoU of 97.58% for weeds and 94.82% for crops. In addition, the data show that the AgriResUpNet can easily find both crops and weeds. This suggests that this design is better for finding weeds early in the growing season. It was shown in experiments and comparisons that the suggested network does better than existing designs in intersection over union (IoU) and F1-score. [ABSTRACT FROM AUTHOR]

Simple Summary: A comprehensive report about the embryonic development of Cirrhinus mrigala is portrayed. Cirrhinus mrigala embryonic development is classified into 22 stages. A time-lapse imaging technique was utilized for a better understanding and display of the results. The current findings will provide profound insights into future research endeavors and the large-scale seed production of C. mrigala.Cirrhinus mrigala is an important edible fish with a significant aquaculture contribution in Southeast Asian countries. The current study aims to enhance our understanding of the developmental biology of Cirrhinus mrigala, which is crucial for implementing sustainable fish farming practices. To induce spermiation and ovulation in Cirrhinus mrigala brooders, the synthetic hormone Ovaprim® (GnRH + dopamine inhibitor) was administrated as a single injection dose of 0.2 mL/kg to males and 0.4 mL/kg to females. After induction, the fish spawned, and the eggs produced were fertilized artificially and cell division commenced successfully. The characteristics of each larval developmental stage were closely observed and recorded using a time-lapse imaging technique. The fertilized eggs were spherical, demersal, and non-adhesive throughout their incubation period. The spawned eggs ranged in diameter from 2.1 mm to 2.13 mm and possessed circular yolk sacs. The gastrula stage initiated approximately 4 h after fertilization, with 25% of the yolk sphere covered by blastoderm, reaching 75% coverage at the end of the gastrula stage, approximately 6 h post fertilization. Organogenesis was marked by the formation of notochord and the visibility of rudimentary organs such as the heart, eyes, and gills, followed by tail movement, which was observed at the time of hatching. Compared to other cyprinid fishes, C. mrigala exhibited distinct features at certain stages of embryonic development. Blood circulation was observed to start at the onset of hatching. The lengths of the newly hatched larvae ranged from 2.9 to 3.2 mm, smaller than other reports on induced breeding in carps. The findings of the present study provide a detailed reference for the embryonic development of C. mrigala, which will assist its future research endeavors and large-scale seed production for sustainable aquaculture. [ABSTRACT FROM AUTHOR]

Birds play a critical role as a reservoir for enteric bacteria Escherichia coli and Salmonella enterica. This study aimed to investigate prevalence of E. coli and S. enterica and occurrence of their antibiotic resistance (ABR) genes in selected wild and captive bird species in Pakistan. E. coli and S. enterica were isolated from fecal samples of birds and identified by phenotypic, biochemical, and molecular characterization of ABR genes by PCR. E. coli colonies appeared circular and dark purple on EMB agar media plates while S. enterica colonies were small, circular, and red on SS agar media plates. E. coli and S. enterica isolates were found resistant to amoxicillin, ciprofloxacin, and sulfamethoxazole, while sensitive against doxycycline, gentamycin, and tetracycline. E. coli isolates showed positive results in catalase, indole, and methyl red tests while S. enterica isolates showed negative in citrate, lactose, and urease tests. E. coli and S. enterica strains were 100% and 99% identical, respectively, to previously isolated E. coli and S. enterica strains. Overall prevalence of E. coli and S. enterica was recorded as 16.55% and 2.7% respectively. Captive pigeons exhibited maximum 19.1% and 3.3% occurrence of blaTEM of E. coli and S. enterica respectively, 18.3% and 2.5% of sul3 respectively in peafowls, and 23.3% and 3.3% of qnrA respectively in captive pigeons. It has been concluded that captive birds in districts with lower elevation levels have a higher prevalence of E. coli and S. enterica at high temperatures compared to wild birds in districts with higher elevation levels. [ABSTRACT FROM AUTHOR]

Aquatic resources are being devastating rapidly due to the continuous intrusion of untreated wastes into the environment due to rapid industrialization and causing severe problems to aquatic life. Different physicochemical methods have been used to reduce these pollutants but all have their own limitations including production of secondary pollutants. The current study was designed to show the effect of cellulolytic and sulphate-reducing bacterial species in the form of a co-culture to treat an in-vitro prepared sulphate-rich wastewater while employing various agro-industrial organic waste as economical growth substrates. A combination of sulphate-reducing and cellulolytic bacteria in a ratio of 1:1 (v/v) was proved to be efficient for the reduction of sulphate in controlled as well as in the experimental conditions. The implicated microbial co-culture reduced 96 and 93 % of the added sulphate (5 gL-1) while using rice straw and animal manure, respectively in a 60-day trial of anaerobic incubation. Mixture of industrial and agricultural waste reduced about 90 % of the total added sulphate. A trend of decrease in pH with time was observed in all the incubated cultures. Our findings will be helpful for devising sustainable waste management strategies. [ABSTRACT FROM AUTHOR]

The Wadi El-Rayan lakes are important aquatic environments located at the border of the great North African Sahara. Quantifying the temporal changes in these lakes due to natural and/or anthropogenic stressors is critical when assessing potential impacts on aquatic ecosystem health and the sustainability of fisheries. To detect the changes in fish communities and their drivers, the landing composition of the Wadi El-Rayan lakes over the past 30 years was quantitatively analyzed. The areas of the lakes dramatically decreased from 110 km2 in 1991 to 73 km2 in 2019. The loss of the lake area was attributed to climate warming, where the evaporation rate exceeded the volume of recharge and the recharge decreased due to an increase in agriculture and aquaculture. The total landing significantly increased in the past three decades due to an increase in the fishing effort (number of licensed boats). Nile tilapia, mullet, and grass carp dominated the landings. The pelagic-to-demersal ratio indicated a shift in the fish community composition towards demersal species. This shift was attributed to an increase in the eutrophication level. The fish communities of the landing data were clustered into four distinct groups. These clusters were significantly differentiated (p < 0.001) in both a PERMANOVA test and a PCA plot. There was a gradual replacement of the dominant species among these clusters. The most recent cluster (2018–2019) was characterized by rare species dominating the community. This shift in species composition suggests that target taxa may have been overexploited. The total landing also decreased, which may have been a result of climate warming. Furthermore, the presence of alien and warm-water species significantly increased. The fish community structure and composition shift could be attributed to anthropogenic (mismanagement) and natural climatic changes (warming). [ABSTRACT FROM AUTHOR]

In this research, some engineering properties were studied for samples of fire clay bricks, which were selected from the study area, Dilbat or Tel al-Deylam, which dates back to the Middle Babylonian era 1500-600 BC in the southern part of the province of Babylon within the Al-Kifl district. The samples taken were subjected to many Engineering tests , which is the ratio of porosity, compressibility, density and ultrasound examination (Vp,Vs), from which each of Young's modulus, Poisson's modulus, Bulk modulus, Shear modulus was extracted, where the average porosity (23.06) which ranges (27.30-18.53), density (1.09 ) ranges (1.52-0.89), water absorption (20.86) ranges (26.17-15.94), compressibility (5.10 ) ranges (9.96-3.31), Vp (1053) ranges (2410-350),Vs (737.1) ranges (1687-245), Young's modulus (1.89) ranges (8.82-0.11), Poisson's modulus (0.013) ranges (0.013-0.013), Bulk modulus (1.89) ranges (8.82-0.11), Shear modulus ( 0.92) ranges (4.32-0.05).

In this paper, oscillation and asymptotic behavior of three-dimensional third-order delay systems are discussed. Some sufficient conditions are obtained to ensure that every solution of the system is either oscillatory or nonoscillatory and converges to zero or diverges as t goes to infinity. A special technique is adopted to include all possible cases for all nonoscillatory solutions (NOSs). The obtained results included illustrative examples.

This prospective quasi-experimental study from the NASAM (National Approach to Standardize and Improve Mechanical Ventilation) collaborative assessed the impact of evidence-based practices including subglottic suctioning, daily assessment for spontaneous awakening trial (SAT), spontaneous breathing trial (SBT), head of bed elevation, and avoidance of neuromuscular blockers unless otherwise indicated. The study outcomes included VAE (primary) and intensive care unit (ICU) mortality. Changes in daily care process measures and outcomes were evaluated using repeated measures mixed modeling. The results were reported as incident rate ratio (IRR) for each additional month with 95% confidence interval (CI). A comprehensive program that included education on evidence-based practices for optimal care of mechanically ventilated patients with real-time benchmarking of daily care process measures to drive improvement in forty-two ICUs from 26 hospitals in Saudi Arabia (>27,000 days of observation). Compliance with subglottic suctioning, SAT and SBT increased monthly during the project by 3.5%, 2.1% and 1.9%, respectively (IRR 1.035, 95%CI 1.007-1.064, p = 0.0148; 1.021, 95% CI 1.010-1.032, p = 0.0003; and 1.019, 95%CI 1.009-1.029, p = 0.0001, respectively). The use of neuromuscular blockers decreased monthly by 2.5% (IRR 0.975, 95%CI 0.953-0.998, p = 0.0341). The compliance with head of bed elevation was high at baseline and did not change over time. Based on data for 83153 ventilator days, VAE rate was 15.2/1000 ventilator day (95%CI 12.6-18.1) at baseline and did not change during the project (IRR 1.019, 95%CI 0.985-1.053, p = 0.2812). Based on data for 8523 patients; the mortality was 30.4% (95%CI 27.4-33.6) at baseline, and decreased monthly during the project by 1.6% (IRR 0.984, 95%CI 0.973-0.996, p = 0.0067). A national quality improvement collaborative was associated with improvements in daily care processes. These changes were associated with a reduction in mortality but not VAEs. Registration The study is registered in clinicaltrials.gov (NCT03790150).

This study investigates the impact of corporate social responsibility (CSR) on firm reputation and organizational citizenship behavior, along with the mediating inclusion of organic organizational cultures (Clan and Adhocracy) in the medium and large enterprises of Pakistan. To do the path analysis and to investigate the mediating role of organic organization culture, Smart PLS was used. For data collection, the convenience sampling technique was used and responses from 360 questionnaires were the main data source. The results displayed that CSR has a significant and optimistic effect on a firm reputation and employees’ organizational citizenship behavior (OCB). Secondly, the outcomes showed a positive and full mediation effect of organic organizational cultures between CSR and firm reputation but a partial mediation effect of organic organizational cultures between CSR and employees OCB. Further, the results demonstrated a positive and significant influence of employees’ OCB on a firm reputation. The extensive analysis of all factors of the study was autonomously examined to identify the insights that verify how the inclusion of organic organizational cultures can boost the firm reputation and employees’ OCB. Theoretical implications and future research direction are discussed.

Introduction: Students' perceptions of the assessment tasks can be a basis for optimizing the classroom assessment environment. In an attempt to quantify students' perceptions of assessment, Dorman and Knightley (2006) developed Perceptions of Assessment Tasks Inventory (PATI). This study sought to provide evidence for the construct validity of the PATI. Method: A descriptive research design was employed in this study. Using a cluster sampling process, the participants were 330 Omani students (175 females and 155 males) enrolled in grade 11 science classes. Three instruments were used in the study concerning self-efficacy, perceptions of classroom assessment environment, and perceptions of assessment tasks. Data were analyzed using confirmatory factor analysis, cluster analysis, multivariate analysis of variance, one-way analysis of variance, and Pearson product-moment correlation analysis. Results: Results indicated that a five-factor structure of the PATI provided a good fit to the observed data. Cluster analyses suggested three clusters of students who were distinct with regard to their perceptions of the assessment tasks. Scores of the PATI subscales correlated positively with perceived learning assessment environment and negatively with perceived performance assessment environment. The PATI scores had acceptable levels of internal consistency reliability. Conclusion: In conclusion, the results support the utility of the PATI for research and instructional purposes. It offers information that can be used by teachers to better orient classroom assessment toward improved student motivation and learning. Researchers might need to conduct studies linking between perceptions of assessment tasks and other characteristics of students and teachers.

Objective: The present research was carried out to observe withdrawal effects of energy drinks, whether thesehistomorphological changes are reversible or not. Study Design: Laboratory based experimental study. Place and Duration of Study: The research was carried out from 1 July to 30 August 2019 at national institute of health Islamabad. Materials and Methods: Total thirty adult male albino rats were divided into 3 groups by simple random sampling, with ten rats in each group. Group I was control group, while energy drink group II received 3.57ml/kg body weight red bull corresponding to one can of energy drink (250ml) in humans orally for eight weeks. Rats in withdrawal group III received energy drink for first four weeks followed by normal diet and water for last four weeks. After eight weeks, rats were sacrificed and their right kidneys were removed. Slides were prepared using hematoxylin eosin and Periodic Acid Schiff Stain, results were analyzed by SPSS. Results: The results showed that use of energy drink for 8 weeks resulted in increase in weight of kidneys along with histological alterations in renal cortex of rat kidneys. Grade 4 (severe) congestion, hemorrhage, loss of brush border and necrosis was observed in energy drink group II. Withdrawal of energy drink in group III resulted in weight of kidneys near to control group along with significant reduction in congestion, hemorrhage,loss of brush border and necrosis grades from grade 4 to grade 3 and 2 with P≤0.05. Conclusion: Caffeinated energy drinks are having damaging effects on kidneys of albino rats and these histological changes caused by caffeinated energy drinks in this duration of study and in low doses corresponding to one can of energy drink (250ml) in humans are reversible.

Background: Parathyroid hormone (PTH) has been reported to have a positive correlation with insulin resistance and the development of the metabolic syndrome. This study aims to evaluate if there is an association between obesity and serum PTH levels. Methods: This case-control study was conducted at the Faiha Specialized Diabetes Endocrine and Metabolism Center in Basrah (Southern Iraq) from September 2018 to July 2019. A total of 230 patients were recruited for this study (103 male and 127 female), divided into 2 groups according to the BMI: 65 pg/mL. Results: The mean age of the obese and control groups was 44.39 ± 10.64 and 30.12 ± 8.95 years, respectively. About 46.25% of obese were men and 53.75% were women, while 42% of the control group were men and 58% were women. Serum PTH level was significantly higher (p < 0.001) among obese persons with a mean level of 53.21 ± 19.58 pg/mL for obese and 37.63 ± 21.8 pg/mL for control. Vitamin D deficiency was seen in 84.4% of the obese group while in 71.1% of the control group (p value 0.04). Females turned to have higher PTH levels than males in both the obese and the control group (p value

Construction industry is dynamic in nature worldwide because of growing ambiguities in costs, techniques, and construction processes. The construction projects undergo various events and activities with change of stakeholders in constantly variable working environment. This is why, construction industry is one of the most hazardous industries with high rates of accidents, injuries, and deaths. This study aimed to review the role of management (owner/clients) in fostering occupational health and safety (OHS) in preconstruction phase of projects. The methodology adopted in this study focused on extensive review of literature related to roles of owner in fostering construction safety, including a process of identification and sorting of owner roles in planning, design, and tendering and procurement stages of project. The review of literature led to the identification of 55 roles of owner from 22 sources focusing on OHS in preconstruction phase of projects. The identified roles of owner were categorized according to three stages of preconstruction phase viz. planning, design, and tendering and procurement. Overall, 14 roles in planning, 19 roles in design, and 22 roles in tendering and procurement of construction projects, were identified for owner/client. In conclusion, role of owner in planning stage revolved around proactive identification of potential hazards which can influence the status of OHS at construction sites, while for the design, the roles included selection of safe designers utilizing safe design approaches with high precision, for designing out the risks identified in planning. Subsequently, owner roles in tendering and procurement stage encompassed correct selection and efficient management of contractors, provision of safety budget, and conduct of site inspections for compliance to safety requirements detailed by owner. The identification of and compliance to owner roles will improve the status of safety standards in global construction sector.