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Advancing Autonomous Vehicle Navigation through Hybrid Fuzzy-Neural Network Training Systems
No full textIn the evolving realm of autonomous vehicle navigation, the integration of fuzzy logic and neural networks presents a formidable challenge, particularly in the context of real-time, on-the-fly neural network training. This paper addresses the gap in dynamic and adaptable training methods necessary for navigating unpredictable environments with limited computational resources. The primary objective of our study is to empirically validate a hybrid training approach that combines fuzzy logic with back-propagation learning algorithms, aiming to optimize neural network performance under hardware constraints. Our methodology leverages a fuzzy logic trainer to provide initial training sets dynamically, which guide the neural network in adjusting its weights in real time, thus facilitating adaptive learning during navigation tasks. The findings reveal that this integrated approach not only enhances the learning efficiency of neural networks but also significantly improves navigation accuracy in real-time scenarios. These advancements contribute to the field by demonstrating the feasibility of deploying more adaptable and robust autonomous navigation systems, potentially expanding their application in more diverse and challenging environments
A Review of Rheological Properties of Steel Fiber Reinforced Concrete
No full textThe rheological properties of steel fiber reinforced concrete have a significant impact on engineering quality, and experimental characterization of the rheological properties of steel fiber reinforced concrete has significant engineering significance and scientific research value. By reviewing relevant literature both domestically and internationally, the article compares and analyzes the construction characteristics and applicable scope of commonly used concrete rheometers, and analyzes the influence of factors such as water cement ratio, mineral admixtures, aggregate properties, steel fiber properties, and additives on the rheological performance test results. The results show that there are significant differences in the test results using different rheometers, and the degree of influence of different factors on the rheological properties of steel fiber reinforced concrete is also different. This can provide reference for the selection of rheological performance testing methods and parameter control of steel fiber reinforced concrete
Mercury and Cardiovascular Health: Exploring the Correlation between Atherosclerosis and Hypertension
No full textAims: To explore the association between mercury exposure and cardiovascular health, focusing on its impact on hypertension and atherosclerosis in individuals exposed to inorganic and organic mercury forms. This study aims to review the evidence on how mercury contributes to endothelial dysfunction, oxidative stress, and inflammation, which are critical mechanisms in cardiovascular disease development.
Study Design: This is a literature review based on observational and epidemiological studies conducted between 2000 and 2023, which investigated the effects of mercury exposure on cardiovascular diseases.
Place and Duration of Study: Studies included were sourced from PUBMED, BVS, SCIELO, LILACS, and MEDLINE databases, published between 2000 and 2023.
Methodology: This integrative review included studies on the association between mercury exposure and cardiovascular health, focusing on hypertension and atherosclerosis. The search was conducted in the PUBMED, BVS, SCIELO, LILACS, and MEDLINE databases, covering publications from 2000 to 2023 and using specific terms with Boolean operators. Observational and experimental studies in humans were included, excluding those with significant biases, unavailable in full text, or involving only in vitro or animal models. Screening was performed in three stages, with two independent reviewers and a PRISMA flow diagram to document the process.
Results: The studies consistently indicated a significant association between mercury exposure and increased risk of hypertension and atherosclerosis. Individuals with higher mercury levels showed greater arterial stiffness, calcification, and an elevated risk of myocardial infarction and strokes. Observational studies in populations exposed to mercury, either occupationally or through diet, demonstrated a dose-dependent relationship between mercury exposure and cardiovascular events.
Conclusion: Mercury exposure, particularly in vulnerable populations like industrial workers and communities with high fish consumption, is a significant risk factor for cardiovascular diseases. The review underscores the importance of stringent public health policies and regular monitoring of mercury levels in at-risk populations to prevent long-term cardiovascular damage
An Advanced Spherical Bearing Model with FEA Analysis
No full textThe mechanical properties of spherical bearing have a direct influence on the seismic performance of bridge construction. Aiming at QZ12500GD spherical bearing, Abaqus finite element analysis software was used for modeling and analysis, and vertical pressure, horizontal thrust and vertical tension were analyzed to study the deformation and stress of the bearing. The model parameters and modeling method of spherical bearing in finite element software analysis are obtained. The analysis results show that this kind of bearing form has good deformation and bearing capacity under the design bearing capacity, and meets the design requirements
An Investigation on 3d Printing Board Lattice Structure Material
No full textStructural lightweight design is the process of reducing the amount of material in a component to reduce its overall weight without sacrificing reliability or function. It is the most common application in aerospace, automotive manufacturing and Marine ships, and has received extensive attention from the industry and academia. TPMS combined with 3D printing technology can realize the integrated production of porous structures, solve the problem of processing micro-size material components, and is an important technical support in the process of structural lightweight. In this paper, by designing different TPMS porous structures and optimizing the 3D printing parameters process, polylactic acid (PLA) was successfully printed by material fusion deposition molding (FDM) method, and the tensile and compression characteristics of different structures were analyzed through mechanical properties testing. The experimental results show：
The print specimen is divided into three stages in the whole tensile process, which are elastic stage, yield stage and fracture stage, and the failure form is brittle failure. Among them, the tensile properties of D structure are the best, while the tensile properties of F-RD structure and N structure are relatively poor.
The printed specimen has two forms in the whole compression stage process, FRD structure and D structure have three stages, that is, the rising stage, the gentle stage, the second rising stage, and the N structure has only two stages, that is, the rising stage and the second rising stage. Among them, F-RD structure and D structure have relatively good compression performance, The shape variables are all about 55% under 13MPa, while N structure has poor compression performance, At 13MPa, the shape variable is only 15%.
The type D sample has horizontal pore type, the more uniform the stress is, and the lower the number of stress concentration sites in the same position interface, the better tensile and compressive properties. FRD sample has large pores, but the number is small, the force is more uniform, and the overall tensile and compressive properties are slightly lower than D sample. N-type samples have the largest number of pores, small pores and large distribution area. In the same section, there are many stress concentration locations, which seriously affect the tensile and compressive properties, so the N-type tensile and compressive properties are the worst
Audit Committee Effectiveness and Earnings Quality: Perception-based Evidence from Uganda
No full textThis study aims to (1) determine the association between audit committee effectiveness and earnings quality. (2) examine whether all the audit committee effectiveness attributes such as independence, financial expertise, diligence, resources and authority are significantly related to earnings quality.
Methodology: The study used a cross-sectional and correlational research design. Data were collected using a survey research instrument from the Chief Finance Officers and Heads of internal audit departments of 136 regulated firms in Uganda. Data were analyzed using the Statistical Package for Social Scientists V.26.
Findings: The findings indicate that audit committee effectiveness is positive and significantly associated with earnings quality. The study also reveals that amongst all the dimensions of audit committee effectiveness, only audit committee financial expertise has a positive and significant effect on earnings quality in regulated firms in Uganda.
Research implications/Limitations: This study focused only on regulated firms in Uganda. Future studies could be carried out in unregulated firms in Uganda.
Originality/Value: The study is one of the few studies that examines earnings quality using a perception-based approach. Also, the study reveals that only audit committee financial expertise explains more variations in earnings quality than the other four dimensions do, in regulated firms in Uganda
A Brief Review on Recycled Aggregate Concrete
No full textThis paper briefly introduces the recycling and regeneration preparation of waste concrete, as well as the crushing and screening process of waste concrete blocks. The properties of crushed aggregate and the physical and mechanical properties of recycled concrete were analyzed, and the research status of compressive strength and splitting tensile strength of waste concrete at home and abroad was summarized and analyzed. Factors such as water-glue ratio, water absorption, apparent density of recycled coarse aggregate, state of recycled coarse aggregate and strength of virgin concrete will affect the strength of recycled aggregate concrete. This paper also summarizes the relationship between the splitting tensile strength of recycled aggregate concrete and the compressive strength of the cube
Role of Audio Visual Aids to Impart Garden-Based Nutrition Education for Preschoolers
No full textIntroduction: One of the most critical period in human life is the preschool years. In order to develop healthy food habits nutrition education need to be imparted at this age. There is a novel strategy to deliver nutrition education to children namely Garden-Based Nutrition Education (GBNE). Utilization of nutrition education tools can be an effective way for the delivery of GBNE.
Aim: To develop PowerPoint presentation on the importance of fruits and vegetables converts to video form and a child friendly gardening video for preschool children and assess the feasibility and acceptability.
Materials and Methods: Audio visual aids like power point presentation and videos were developed. Power point presentation on importance of fruits and vegetables was developed in such a way that it can reach the respondents and convey the intended message for preschool children with a total of 13 slides.
A documentary child friendly gardening video was constructed having a duration of nearly seven minutes with the title “Garden Based Nutrition Education” with the intention to inculcate gardening skills among children from their early childhood years. Both the tools were developed using standardized procedures and was subjected to pre study. In order to assess the feasibility and acceptability of the developed GBNE tools it was subjected to preschool teachers/anganwadi workers and parents of preschool children. The sample consisted of 75 parents and 75 preschool teachers which was randomly selected from Kollam and Thiruvananthapuram districts of Kerala.
Results: The study reveals that, both parents and teachers finds child friendly gardening video as the most feasible and acceptable tool to impart garden-based nutrition education.
Discussion: Preschool children loves gardening ad watering. Child friendly gardening video is most involving and interesting in nature when compared to power point video.
Conclusion: Therefore it can be concluded that power point video on importance of fruits and vegetables and child friendly gardening video can be used as effective GBNE tool to teach the significance of fruits and vegetables through gardening activities
To Develop Ground Water Quality Index using Fuzzy AHP at Tamsa Watershed
No full textThe ecological sustainability of rivers is in question due to severe pollution and lack of stringent regulations. For trend analysis 14 parameters were used such pH, EC (μS/cm at 25°C), TDS (mg/l), Total Hardness (mg/l), Calcium (mg/l), Magnesium (mg/l), Sodium (mg/l), Potassium (mg/l), Carbonate (mg/l), Bicarbonate (mg/l), Sulphate (mg/l), Chloride (mg/l), Fluoride (mg/l) and Nitrate (mg/l). The value of water physical, biological and chemical parameters of temporal resolution indicate that value of pH, EC (μS/cm at 25°C), TDS (mg/l), Total Hardness (mg/l), Calcium (mg/l), Magnesium (mg/l), Sodium (mg/l), Potassium (mg/l), Carbonate (mg/l), Bicarbonate (mg/l), Sulphate (mg/l), Chloride (mg/l), Fluoride (mg/l) and Nitrate (mg/l) were observed very high compared to recommended value of Bureau of Indian Standards (BIS) and World Health Organization (WHO). The average water quality index value was observed as 381.244 hence, it can be concluded that the investigated ground water was not suitable for drinking and even irrigation purposes
Realizing Low-carbon and Climate-resilient Development on Aquaculture
No full textAquaculture production supports food security, and it is an important commodity for Indonesia\u27s exports. Climate change determines the sustainability of aquaculture production. Low-carbon development is an effort to control the impact of climate change from a mitigation standpoint, while climate-resilience development is an adaptation. In order to realize sustainable aquaculture in a broad and long dimension and in line with the Sustainable Development Goals (SDGs), it is necessary to develop a low-carbon and climate-resilience development strategy. A descriptive analysis was carried out on a review of published literature to develop the concept of low-carbon and climate-resilience development in aquaculture. The keywords used in the literature search are the impact of climate change on aquaculture, low-carbon development, climate-resilience development, and achievement of the SDGs in aquaculture. The research that has been published mostly discusses the potential Green House Gas emissions (GHG) from aquaculture activities, is still very limited and explains efforts to mitigate and adapt aquaculture to climate change. Efficiency and use of alternative energy sources, increased productivity, feed efficiency and effectiveness, effluent management, disease control and water quality management, and superior seeds can be applied in low-carbon emission development. Meanwhile, climate-resilience development that can be implemented includes the implementation of Integrated Multi-Tropical Aquaculture (IMTA) and Regional Integrated Multi-Tropical Aquaculture (RIMTA), closed systems, and Recirculating Aquaculture Systems (RAS), as well as ponds that integrate mangroves