GS Engineering (United States)

This study examines parent satisfaction at Orchids International School, focusing on academic quality, communication, infrastructure, and overall school environment. A descriptive research design was adopted, and data was collected from 110 parents using a structured questionnaire. Statistical tools such as percentage analysis, Chi-square test, and ANOVA were used to analyse the data. The findings indicate that parents are generally satisfied with the school’s services, particularly infrastructure such as laboratory and library facilities, which are highly rated. Digital communication, especially through the school app, is the most preferred method among parents, highlighting the importance of technology in communication. However, some parents expressed concerns regarding classroom environment and maintenance, indicating areas for improvement. Overall, the study concludes that while the school maintains a positive image and meets expectations in many areas, continuous improvements in facilities and communication strategies can further enhance parent satisfaction.

Abstract The work involves formulating nitrile butadiene rubber (NBR) having improved mechanical and chemical properties, by incorporating nanomaterials, such as COOH graphene, OH graphene, COOH graphene + CNT and OH graphene + CNT, in addition to carbon black. NBR is widely used in the automotive, aerospace and petroleum industries because it has outstanding resistance to oil, fuel and chemicals. However, to be eligible for higher level applications, NBR must also have good tensile strength, tear resistance, hardness and oil-swelling resistance. The nanocomposite samples were compounded by two-roll mill and vulcanized under optimum conditions. The performance of the composites was tested by using characterization methods such as tensile, elongation, tear, hardness, compression set and oil swelling tests. The FESEM morphological study established nanomaterial uniform dispersion, leading to improved mechanical properties. The results show that the developed nanocomposites possess better strength, durability and deformation resistance, which render them appropriate for high-performance applications.

Electrospun nanofiber scaffolds met a pressing need for degradable matrices that matched the architecture and mechanics of soft tissues, yet neat poly(ε-caprolactone) (PCL) fibers often exhibited low surface energy, modest stiffness, and a loss of strength after sterilization and hydration. Graphene additives were expected to provide interfacial reinforcement and wettability improvements, but the effects of specific functional groups at low loading and under clinically relevant conditioning conditions had not been clarified. This study aimed to engineer sterilization-resistant, water-stable PCL scaffolds by comparing carboxyl- and hydroxyl-functionalized graphene (CFG and HFG) and defining an operating window via response surface methodology. PCL was electrospun with 0.5-2.0 wt% CFG or HFG while varying voltage; dispersion and chemistry were verified by FTIR and Raman mapping, thermal behavior by DSC/TGA, mechanics by tensile and DMA including cyclic loading, stability by EtO and γ sterilization with wet testing, surface energetics by contact angles and Owens-Wendt analysis, protein adsorption by BSA/fibronectin assays, cytocompatibility by human dermal fibroblasts, and aging by PBS degradation with GPC. The 1 wt% composites increased ultimate tensile strength by ~45%-55% and modulus by ~40%-55% relative to neat PCL, with modest reductions in elongation; storage modulus increased across -20°C to 60°C, and the composite retained ~98% stiffness after 50 cycles compared with ~90% for PCL. After γ-sterilization, strength retention was ~90%-92% for composites versus ~80% for PCL; wet-state modulus retention approached ~95%. Tc shifted upward by 2°C-3°C and crystallinity increase by ~5%-8%, while TGA showed a ~10°C onset increase; Raman maps confirmed uniform dispersion with ≈ 1.1 (CFG) and ≈1.0 (HFG). Contact angle fell from ~130° (PCL) to ~90°-95°, fibronectin adsorption increased and correlated with Day-7 viability (R ≈ 0.95), hemolysis stayed near 1%-2%, and bacterial attachment decreased to ~70%-80% of PCL. Response-surface analysis identified a practical region around 1.2-1.3 wt% graphene and 16-18 kV that balanced strength and sterilization retention. These findings supported use in soft-tissue scaffolds requiring robust handling and rapid cell coverage, and suggested extension to scale-up studies and invivo validation, including sterilization dose mapping and sustained-release add-ons.

The presence of unregulated high blood pressure (BP) is linked to an elevated chance of health problems, some of which may cause harm to a range of organs across the body. Among the most dangerous as well as widespread conditions is hypertension, which refers to increased blood pressures. Unfortunately, correct blood pressure readings need the use of many medical instruments. The proposed system compares the systolic and diastolic objectives of blood-pressure readings, which are obtained using analogue devices and those obtained using an electronically controlled blood pressure reading tool. The systolic measurement alone had a mean variance of 3,265 mmHg, while the diastolic measurement had a mean variance of 6,165 mmHg. The discrepancy is then included into these processes of calibrating the automated blood pressure measuring device. The accuracy of the output of the calibration reading tool is between 99.47% and 99.82%.

The issue of energy shortage is becoming more and more frustrating due to the rapid advancement of technologies, the expansion of industries, and household demand. Because of its affordable price and high production, the photovoltaic (PV) system has seen a significant increase in popularity in recent years. In order to draw the maximum electrical energy from the solar system, a novel maximum power point tracking controlling technique, named as Biruni Earth radius search algorithm, is developed. Moreover, the voltage regulation is performed for boosting the PV output voltage with less stress among the switches; a unique converter, an ultrahigh step-up converter, is implemented in this work. Because of the quick response time and ability to handle both linear and non-linear values, fractional-based Proportional-Integral-Derivative (PID) controllers are becoming well-known due to the notion of fractional calculus. To improve the system's amplitude and dynamic response, an inverter controlling model, referred to as boosted sooty optimized adaptive fractional, is implemented in this study. This controlling algorithm is developed with the use of boosted sooty tern sail fish, which helps to tune the parameters of kp, ki, and kd. The performance of the proposed system design are assessed by using several measures such as IV & PV characteristics, output voltage, power, total harmonic distortion, efficiency, etc.