Dataset and ANFIS model prediction of the performance of graphene nano-LPG in domestic refrigerator system.

LPG's steady-state performance in a base lubricant and a graphene nanolubricant was investigated in this study. Step-by-step processes and procedures for preparing graphene nanolubricant concentrations and replacing them for the base lubricant in a domestic refrigerator system were presented as the measuring devices necessary and their uncertainties. The experimental dataset and the training and testing datasets for Adaptive Neuro-fuzzy Inference System. (ANFIS) are available. The use of an ANFIS approach model to forecast graphene nanolubricant performance in a domestic refrigerator is described. The Root Mean Square Error (RMSE), Mean Absolute Deviation (MAD) and Mean Absolute Percentage Error (MAPE) are also available as statistical performance indicators for the ANFIS model prediction.

Dataset of experimental and adaptive neuro-fuzzy inference system (ANFIS) model prediction of R600a/MWCNT nanolubricant in a vapour compression system.

This research paper assessed the performance of R600a with the base lubricant and Multi-walled Carbon Nanotube (MWCNT) nanolubricant at steady state. It describes the instruments required for measurement of the data parameter and its uncertainties, steps involved in preparing and replacing the MWCNT nanolubricant concentration with base lubricant in vapour compression refrigeration. The system's temperature data was collected at the components inlets and outlets. Pressure data was also registered at the compressor outlet and inlet. The data was captured at 27 °C ambient temperature at an interval of 30 min for 300 min. The experiment includes the experimental data collection, Adaptive Neuro-Fuzzy Inference System (ANFIS) training and testing dataset. The use of ANFIS model is explained in predicting the efficiency of MWCNT nanolubricant in a vapour compression refrigerator system. The ANFIS model also provides statistical output measures such as Root Mean Square Error (RMSE) and Mean Absolute Deviation (MAD), Mean Absolute Percentage Error (MAPE), and determination coefficient (R 2). The data is useful and important for replacing MWCNT nanolubricant with base lubricant in a vapour compression refrigeration system for researchers in the specialisation of energy-efficient materials in refrigeration. The data present can be reused for vapour compression refrigeration systems simulation and modelling.

Dataset and ANN model prediction of performance of graphene nanolubricant with R600a in domestic refrigerator system.

This work evaluated the steady state performance of R600a in the base lubricant and graphene nanolubricant. The measuring instruments required and their uncertainties were provided, step by step method and procedures for preparation of graphene nanolubricant concentration and substituting it with the base lubricant in domestic refrigerator system are described. The system temperatures data was captured at the inlet and outlet of the system components. Also, the pressures data was recorded at the compressor inlet and outlet. The data was recorded for 3 h at 30 min interval at an ambient temperature of 27 °C. The experimental dataset, Artificial Neural Network (ANN) training and testing dataset are provided. The artificial intelligence approach of ANN model to predict the performance of graphene nanolubricant in domestic refrigerator is explained. Also, the ANN model prediction statistical performance metrics such as Root Mean Square Error (RMSE) and Mean Absolute Deviation (MAD), Mean Absolute Percentage Error (MAPE) and coefficient of determination (R2) are also provided. The data is useful to researchers in the field of refrigeration and energy efficiency materials, for replacing nanolubricant with the base lubricant in refrigerator systems. The data can be reuse for simulation and modelling vapour compression energy system.

DENTAL RESIDENTS' PERCEPTION OF LEARNING ENVIRONMENT: EXPERIENCE OF A NIGERIAN TRAINING INSTITUTION.

BACKGROUND: Learning environment has been described as crucial in determining the success of medical and dental education. Continuous evaluation of this environment will help in maximizing the learning opportunities of the training program. OBJECTIVE: To assess the resident doctors' perception of their learning environment at a teaching hospital in Nigeria. METHODS: The DREEM questionnaire was administered to participants undergoing residency training in the faculty of Dental Surgery at the University College Hospital, Ibadan. RESULTS: Thirty-nine resident doctors participated in the study (23 Males, 16 Females), mean age (±SD) was 35.7 (±4.22) ranging from 28 years to 46 years. Mean global score (±SD) was 105.3 (±26.8), 52.7%, out of a maximum of 200. The mean global score according to gender was significantly higher among males than females. The overall perception of the training environment by residents is more positive than negative and the male gender appears to have a more positive perception than the female gender. However, this perception is borderline as the environment was perceived as having many problems and residents' perception of their learning environment is mostly negative. Attention of the institution and trainers should be drawn to possibilities of combating the problem areas for better outcome of residency training in our environment.