The paper analyses the combined effect of fin number (
n
) and inclination (
β
) on the overall performance of the PV module in the finned PV-PCM system by numerical simulation. System geometries ...with no fin to four fins are considered with inclinations varying from 0° to 45° to obtain different configurations of the PV-PCM system. Performance parameters such as mean temperature, PV efficiency, PV power output, mean velocity, and temperature contours are simulated for all the system configurations. The system is subjected to actual dynamic conditions such as variable solar radiation and ambient temperature. The maximum temperature reduction is obtained for the three-finned system with an inclination of 45°. The inclusion of fins is relatively effective for horizontal systems compared to other inclinations, and the highest relative enhancement in efficiency of 5.56% is obtained for horizontal PV-PCM system with 4 fins. Three-finned PV-PCM system with a 45° inclination angle produces the highest instantaneous PV electrical power output of 165.87 W and the lowest peak PV temperature of 50.23 °C, which is the optimum. The peak average velocity of melted PCM is maximum for unfinned PV-PCM system with
β
=
45
∘
, indicating the presence of the highest strength of convection current in melted PCM.
This research paper aims to investigate the effectiveness of gender identification utilizing palatal rugae.
The size of the sample that was selected included 100 people. They were made up of 50 men ...and 50 women, all in between the ages of 18 and 25. To examine their palatal rugae patterns, casts were made after taking maxillary impressions. Based on the size and rugae amount found on the left as well as the right sides, the palatal rugae patterns were investigated. Rugae patterns have been recognized based on the categorization provided by Thomas and Kotze (1983).
Chi-square analysis has been used.
There were comparative variations in the shape of rugae patterns among male and female individuals. The study revealed that the circular pattern was higher in males (
< 0.01) as compared to females and the unification pattern was comparatively greater in females (
< 0.05) as compared to males. The most predominant pattern that was seen in both genders was the wavy pattern that was seen to be present in 57.17% of males and 53.42% of females. The rugae number on the right and left sides did not exhibit any significant variations.
This research thus exhibits a relevant difference in patterns of rugae and also confirms the uniqueness of patterns in each individual. Hence, it could be utilized as an adjunct to other tools for identification in the forensic sciences.
The goal of modern dentistry is to restore optimum oral health, function, and comfort for a patient. For an implant-supported fixed prosthesis, these goals cannot be met if the biomechanical factors ...governing the success of the prosthesis are overlooked. Mandibular flexure is one such factor that needs to be considered, especially when implants are being placed posterior to the interforaminal region. If not, it can lead to problems like increased stress, bone resorption, poor fit of the prosthesis, screw loosening, and patient discomfort. The use of a split-framework prosthesis is one of the measures that could be taken to decrease the stress, ensure a passive fit of the framework, and long-term maintenance of patient comfort and function. This case report describes the oral rehabilitation of a patient using a maxillary cast partial denture and mandibular split framework fixed prosthesis to compensate for mandibular flexure.
Growth Hormone Deficiency (GHD) is one of the most important treatable endocrine causes of short stature. A problem anywhere in the Growth Hormone (GH) - Insulin-Like Growth Factor-1 (IGF-1) axis can ...lead to short stature. Childhood GH deficiency can be congenital, acquired, or idiopathic. Hereby, the authors present a case series consisting of five cases of short stature, aimed to provide an overview of the spectrum of GH-related disorders. All five patients presented to the Paediatric Endocrinology Outpatient Department of a tertiary care Institute with complaints of not gaining height. The patients in present case series had significant short stature (Z score for height <-3 SD (Standard Deviation) in each case). These patients were suspected of having GH deficiency based on clinical presentation and investigations. After a proper diagnostic work-up and GH stimulation tests, cases 1 to 4 were found to have GH deficiency. The 5th case was suspected of having Laron Syndrome based on high GH levels and low IGF-1. There were subtle differences in the spectrum of GH deficiency. The 1st case had Multiple Pituitary Hormone Deficiency (MPHD). Cases 2 to 4 had Isolated Growth Hormone Deficiency (IGHD). Case 2 had findings of pituitary stalk interruption on brain imaging. We found a genetic association in the 3rd case, while the 4th case had almost normal brain imaging. Cases 1 to 4 received GH therapy, and all showed appreciable height gain. These subtle differences can sometimes make the diagnosis difficult, and often a different approach to treatment is required.
The failure characteristics of an asymmetric balsa-core based fibre composite sandwich beam subjected to 3-point bending are investigated analytically and experimentally. The experimental specimens ...comprise a balsa wood core and two types of fibre composite skins, notably glass fibre and carbon fibre. During the static bending test, the effects of carbon fibre loading (CL) face and glass fibre loading (GL) face on bending failure behaviour are tested. Since the skin thickness, span lengths, and core thicknesses has substantial effect on the structural failures. Therefore, a detailed analysis has been carried out considering the effect of varying span lengths, skin thicknesses, and core thicknesses on several failure modes, particularly indentation, face yield, and core-shear. For the analysis, fourteen specimens have been fabricated, each with a specific geometry and face loading conditions. This report consists of a detailed fabrication flow and loading conditions. Finally, the work has been benchmarked with already published report on asymmetric sandwich structures. The analysis's predictions and the results of the experiment indicate remarkable concordance.
This research study aimed to evaluate and compare the capability of four various bite registration materials to reproduce precise interocclusal relationships in the vertical dimension.
Ideal ...maxillary and mandibular casts were mounted on the semi-adjustable articulator in maximum intercuspation after mock tooth preparation on 46, 47, and 48. Models were scanned by the Medit T500 Dental Lab Scanner, and initial reading was noted at the predetermined points. Ten interocclusal bite registrations were made using four materials (CADbite, Jet Bite, Ramitec, and Aluwax). The mandibular model was demounted and again remounted using the interocclusal records, and the final reading was noted after scanning.
Ramitec showed superior results when compared to polyvinyl bite registration material and Aluwax, but the differences between Ramitec, CADbite, and Jet Bite were nonsignificant.
Although all four materials are suitable for clinical use, elastomeric materials showed superior results. In that, polyether was found to be the best.
Objective: The objective is to comparatively assess the impact strength and flexural strength of polyether ether ketone (PEEK) vs. computer-aided design/computer-aided manufacturing (CAD/CAM) ...polymethyl methacrylate denture base material.Methods: A total of 90 samples were fabricated with traditional heat cure PMMA, PEEK, and CAD/CAM PMMA and divided into three groups of 30 samples each. The impact strength of all the samples was measured using an Izod impact tester with a pendulum in the air at 23±2°C. A three-point bending test was used in a Universal Testing Machine to assess the flexural strength of all the samples. The impact strength and flexural strength mean values were computed using a one-way ANOVA test.Result: Impact strength and flexural strength of PEEK (IS=10.22±1.25 kJ/m2 and FS=120±8.0 MPa) is almost identical to CAD/CAM PMMA sample (IS=9.595±3.313 kJ/m2 and FS=118.11±5.00 MPa) whereas for conventional heat cure PMMA (IS=4.00±.011 kJ/m2 and FS=75.4±4.50 MPa) the values are least among the three.Conclusion: PEEK or CAD/CAM PMMA share almost identical and superior mechanical properties, and both can be used as better alternatives for complete denture fabrication rather than using conventional heat cure PMMA.
The discrimination power of the pediatric risk of mortality (PRISM), pediatric index of mortality (PIM), sequential organ failure assessment (SOFA), and pediatric logistic organ dysfunction (PELOD) ...may not always be true for countries such as India due to differences in factors from those nations where these scoring systems were validated. Therefore, this study was undertaken to determine and compare severity, course of illness, and outcomes in critically ill children admitted to the pediatric intensive care unit (PICU) using different scoring systems such as PRISM 4, PIM 3, PELOD 2, and the pediatric sequential organ failure assessment (pSOFA ) score, and to analyze the clinical spectrum and demographic profile of children admitted to the PICU.
This was a prospective, single-center, observational study conducted in the PICU of the Indira Gandhi Institute of Medical Science, Patna, India, over two years. Two hundred children in the age group of one month to 14 years admitted to the PICU were recruited into the study. Prognostic scoring systems, including PRISM4 and PIM3, were used to compare the outcome, mortality, and length of PICU stay, whereas PELODS and pSOFA were descriptive scores that assessed the multiorgan dysfunction. A correlation between the different scoring systems and the outcome was determined.
The majority of children (26.5%, n=53) were one to three years of age. The maximum number of patients was male (66.5%, n=133). Renal complications were the predominant admission diagnosis in 19% (n=38) of children. The mortality rate was found to be 18.5%. The mortality was most common in infants <1 year of age (n=11, 29.73%) and those of the male sex (n=22, 59.46%). A significant correlation was found between length of stay and mortality (p<0.00001). A significant positive correlation was observed between mortality and PRISM 4, PIM 3, PELOD 2, and pSOFA scores on the first day of admission (p<0.00001). The pSOFA and PELOD2 showed better discrimination power (area under the curve (AUC): 0.77 and 0.74, respectively).
The study concluded that the pSOFA and PELOD2 scores are reliable predictors of mortality in critically ill children.
Introduction: Salivary substitutes are gaining popularity these days because of the increase in patients with dry mouth. These substitutes must satisfy certain criteria to fulfill the patient's ...needs. One of these is wettability. Materials and Methods: One hundred fifty rectangular specimens of heat-cured denture base acrylic resin were prepared. A drop of test liquids (human saliva, distilled water, aqwet, saleva, and wet mouth) was placed over the test specimen and right and left contact angles were measured using optical contact angle machine. Results: All test liquids performed better than distilled water. Human saliva has the least contact angle followed by aqwet. Conclusion: Carboxymethyl cellulose base aqwet saliva substitute was found to be best having similar contact angle values to human saliva.
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