Current Issue : October-December Volume : 2025 Issue Number : 4 Articles : 5 Articles
This paper aims to conduct a review analysis related to the terms cost of quality (COQ), cost of poor quality, and hidden quality cost. The analysis of publication data provides insights on understanding historical publication trends for the identification of research gaps related to hidden quality costs. The SCOPUS database was searched, which included journals only. This involved analysis via historical and current research, trending across different countries, academic journals, academic institutions, and prolific authors’ analyses. This literature review revealed that research on COQ spans across various disciplines such as manufacturing, management, healthcare, and construction, with increased interest starting in the 1980s. This trend of increased research around COQ has continued to increase, with a cumulative trend of publications showing steady linear growth over time. This paper has categorized the research trend based on core journals, countries, authors, etc. Although there has been extensive research on COQ, there has been limited research specifically focusing on cost of poor quality and hidden quality cost. The findings from this review analysis reinforce the need for future-focused research on hidden quality cost, research to identify and calculate hidden quality cost, and research towards the development of a comprehensive COQ model encompassing hidden quality cost....
This study explored advancements in photovoltaic technologies by enhancing the electronic quality of multicrystalline silicon (mc-Si) through silicon nitride (SiNx) and hydrogen (H2) plasma deposition via plasma-enhanced chemical vapor deposition (PECVD). This innovative approach replaced toxic chemical wet processes with H2 plasma and SiNx. The key parameters of silicon solar cells, including the effective lifetime (τeff), diffusion length (Ldiff), and iron concentration ([Fe]), were analyzed before and after this sustainable solution. The results show significant improvements, particularly in the edge region, which initially exhibited a low τeff and a high iron concentration. After the treatment, the τeff and Ldiff increased to 7 μs and 210 μm, respectively, compared to 2 μs and 70 μm for the untreated mc-Si. Additionally, the [Fe] decreased significantly after the process, dropping from 60 ppt to 10 ppt in most regions. Furthermore, the treatment led to a significant decrease in reflectivity, from 25% to 8% at a wavelength of 500 nm. These findings highlight the effectiveness of the PECVD-SiNx and H2 plasma treatments for improving the optoelectronic performance of mc-Si, making them promising options for highefficiency photovoltaic devices....
Wide-field-of-view imaging using remote-sensing cameras is of great significance in the study of polar environments. However, because of the drastic change in the direction of Earth’s rotation velocity near the polar regions, image-shift analysis and image quality changes in polar images by large wide-space time-delayed integration (TDI) cameras are poorly understood. Therefore, in this study, a novel velocity projection method was used to obtain a mathematical model of the image-shift velocity field. A quantitative analysis of the simulation showed that the anisotropy of the instantaneous image-shift velocity field varied significantly from low to high latitudes, and rapidly decreased to zero at a very low instantaneous point when there was no anisotropy. After correcting for the camera travelling frequency and bias angle, the value of the modulation transfer function at the edges decreased by less than 5% at 196 levels of integration. Thus, a theoretical basis was provided for using a large wide-space TDI camera to photograph high latitudes. The findings of this study provide a theoretical reference for the current large field-of-view space cameras to obtain high-latitude target information for the edge fuzzy degradation problem....
The aim of this study was to develop basic findings for a continuous Signal Quality Monitoring system based on a measurement campaign. Four Galileo satellites were repeatedly recorded, using a dish antenna, and their metrics were analyzed. Due to the stable course, thresholds for the detection of threat models can be determined. These values were tested against simulated signals and the sensitivity of the detection was found to be satisfactory. Based on the convergence behavior of the data, a measurement duration of 180–200 s can be recommended. Finally, the influence of the GPU and memory clock on the performance of predefined conditions close to the receiver was tested. The core clock of the GPU was identified as the bottleneck of the processing....
This study investigated the spatiotemporal dynamics and driving forces governing water quality variationsin the Midstream of the Chishui River, a pivotal area for China’s iconic liquor production, focused on its mainstream and tributaries. Through monthly intensive sampling and monitoring, combined with water quality assessment methods (single-factor evaluation and the Nemerow index method) and hydrochemical analysis, the spatiotemporal patterns and driving mechanisms of the water environment were systematically analyzed. The key findings reveal three distinct patterns. 1. Spatial heterogeneity: There is a notable difference in water quality between the main stream and tributaries, with the main stream exhibiting better water quality, while some tributaries show poorer water quality during certain months. 2. Seasonal ion variability: The proportions of Mg2+, Cl−, and SO3 2− peaked during winter and spring, while concentrations of cations and anions decreased in summer and autumn. 3. Driving factors: The spatial disparity between mainstream and tributary water quality was primarily controlled by anthropogenic activities, whereas temporal variations in ionic composition were jointly influenced by basin lithology and seasonal environmental-climatic changes. Enhanced tributary management and climate adaptive monitoring strategies are proposed to safeguard water resources critical for both ecosystem integrity and specialty beverage manufacturing....
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