We propose an approach for representing an object by its constituent parts and their spatial connections based on a set of primitive volumes called geons.We utilize .the edge-junction graph of an object range image as input, then decompose this graph into different subgraphs which correspond t o the constituent parts of the object. For each part, edge characteristics guide us to an inference regarding the corresponding geon shape. Also, the spatial connections among these parts can be deduced from the concave edges and T-junctions. Experimental results with a laser rangefinder are presented.
For an ample groupoid G and a unit x of G, Steinberg constructed the induction and restriction functors between the category of modules over the Steinberg algebra AR(G) and the category of modules over the isotropy group algebra R G x . In this paper, we prove a graded version of these functors and related results for the graded Steinberg algebra of a graded ample groupoid. As an application, the spectral simple and graded simple modules over the Leavitt path algebra LK (E) are classified. In particular, we show that many of previously known simple and graded simple LK (E)-modules, including the Chen simple modules, are induced from (graded or non-graded) simple modules over isotropy group algebras.
In the scenario of sustainable technology application, the minimization of waste and resource consumption are more fundamental compared to effluent quality. In recent years, many kinds of researches related to green technology in wastewater treatment have been conducted, such as constructed wetland, membrane bioreactor, etc. With the same perception, the co-digestion of kitchen waste and sewage study was carried out. The principle of this environmentally friendly technology is to create a low-cost pretreatment for domestic wastewater, by taking advantage of the organic carbon available in the leftovers to remove contaminants in the wastewater, improve water quality, reduce excess sludge and save money. The study is aimed to evaluate the carbon and nutrient recovery of a laboratory single-stage anaerobic membrane bioreactor (1S-AnMBR), which included an Up-flow Anaerobic Sludge Blanket (UASB) continuous with an UF membrane bioreactor. The result shown that the obtained COD removals were above 80% at all organic loading rates (OLRs). The effluent COD concentrations were 160±21, 227±45, 340±78, 563±104 and 886±96 mg.L-1 at OLRs of 0.9 to 1.5; 2.0; 3.5; 5.0 and 7.0 kg COD.m-3.day-1, respectively. The biogas yields collected were 1119±76, 1550±68, 2155±80, 3610±86 and 5989±88 mL.day-1 at OLRs of 0.9; 1.5; 2.0; 3.5; 5.0 and 7.0 kg COD.m-3.day-1. High performance of ammonia conversion from organic nitrogen was obtained in the AnMBR. Total nitrogen and phosphorus losses were 12% and 15%, respectively. Transmembrane pressure (TMP) increased to the pressure limit of 45kPa after 11 days of operation at OLR of 5 kg COD.m-3.d-1. Thus membrane fouling is a big challenge for AnMBR. Besides these promising research outcomes, the technology is expected to bring convincing results into practice in the co-digestion of solid wastes and sewage that may be suitable for rural or remote areas, in which solid waste and sewage collection systems are not available.
The threat of climate change poses manifold dangers for human health and well-being and the world’s ecosystems as well. One of the most widely accepted helpful measures to mitigate climate change-related risks is at the business or corporate level, aiming to reduce carbon dioxide emissions and innovate climate-friendly technology. However, doing so requires comprehensive factors, including legislation, company strategy, and finance. Using the Bayesian Mindsponge Framework (MBF) for analyzing 178 enterprises listed in the S&P 500 companies from 2016 to 2021, this paper examines how climate risk-mitigating efforts can affect their stock price and market value. The findings suggest that carbon dioxide emissions seriously affect stock price. In contrast, the income and mitigation strategies, including producing eco-friendly products, using renewable energy, and environmental expenditures investments, are positively associated with an increase in share value. However, such mitigation efforts are conditional on the income made by the company. Indicated here is that corporations must be able to transform financial capital from the stock market into bankable, climate-resilient projects. Based on these findings, we suggest that building an eco-surplus culture by stimulating climate change knowledge constitutes a promising approach to promoting a corporation’s mitigation efforts.
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