Academic literature on the topic 'Harmless configuration'
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Journal articles on the topic "Harmless configuration"
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Novaro Mascarello, Laura, and Fulvia Quagliotti. "Design of inoffensive sUAS for humanitarian missions." Aircraft Engineering and Aerospace Technology 90, no. 3 (April 9, 2018): 524–31. http://dx.doi.org/10.1108/aeat-11-2016-0235.
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Purpose The purpose of this study is to define configuration requirements needed to define “harmless” small unmanned aerial systems (sUAS) by taking into account mathematical models and ballistic approaches, already defined for small projectiles and now modified, with appropriate assumptions. These safety requirements are related to structures, materials, weight and dimensions, such as the radius of curvature. Design/methodology/approach In this paper, the state-of-the-art forensic and ballistic physics models are presented, and then safety requirements are defined for sUAS. This big challenge is due to a lack of regulation because each country and each regulatory authority have published their own regulations, where the imposed requirements are different because the mathematical models, and the related assumptions, are different from one country to another. Therefore, proper assumptions are introduced in these models to obtain safety requirements to define harmless final configuration. Findings If the final configuration meets the requirements defined in the methodology, there are no severe injuries on the human body, in case of impact with the sUAS. In other words, the inoffensive configuration can also be used in overcrowded areas without risks for the human life. Originality/value The final configuration proposed in this paper has some design features substantially modified, compared to the conventional configuration, and in particular, the sUAS could be the first harmless multicopter certified in Italy.
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Qiu, Rongxiang. "Applications of transition state calculations in the key cyclization of small molecule natural product synthesis." E3S Web of Conferences 290 (2021): 01024. http://dx.doi.org/10.1051/e3sconf/202129001024.
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The diversification of the conformation and configuration of the carbocyclic skeleton of natural products is an important reason for the diversity and complexity of the structure of natural products. The corresponding cyclization synthesis has attracted much attention. Computational chemistry approaches have the advantages of non-toxic, harmless and relatively low cost, and they are increasingly used to model and understand molecular phenomena. The reaction mechanism and thermodynamic parameters determine the feasibility of the cyclization and the enantioselectivity of the cyclization products. The transition state calculations can provide these thermodynamic parameters, which helps to elucidate the cyclization mechanism, calculate the reaction rationality, predict the performance of the new synthesis method and provide a basis for the comprehensive synthesis design.
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Gao, Quanjin, Sone Simatrang, and Eakachat Joenurairatana. "Research on the Sustainable Utilization of Ceramic Waste under the Green Development Model." E3S Web of Conferences 370 (2023): 02005. http://dx.doi.org/10.1051/e3sconf/202337002005.
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China is a big ceramic country, and the production of ceramics has been the first in the world. With the development of the ceramic industry, there are also more and more waste materials. Such a large amount of ceramic waste is not a simple landfill that can solve the problem. Through the analysis of the current situation of solid waste in our ceramic industry, we see that the modern decoration and ceramic raw material regeneration technology to the life cycle of ceramic product design and arrangement make the resources and energy most effectively consumption configuration, so as to achieve the purpose of ceramic waste reduction, recycling, harmless, make ceramic industry production on the road of sustainable development.
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Xuan-He, Su, and Lu Wei. "Benefit analysis of 15 MW biomass direct-fired power cogeneration project." IOP Conference Series: Earth and Environmental Science 1074, no. 1 (August 1, 2022): 012009. http://dx.doi.org/10.1088/1755-1315/1074/1/012009.
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Abstract Biomass direct-fired power generation technology has many advantages in realizing large-scale harmless utilization of biomass resources. It is an effective way to achieve the goal of carbon peak and carbon neutrality. Taking the 15MW direct-fired biomass power generation project of typical unit configuration as an example, this paper constructs a CHP system with biomass as fuel to replace the traditional coal-fired boiler for power generation, analyzes its economic, environmental and energy-saving benefits. As shown by results, compared with the conventional coal-fired power plant, the system cannot only save more than 700000 tons of coal, but also reduce more than 1610.41 tons of carbon dioxide emission, more than 26.41 tons of sulfur dioxide emission and more than 3000 tons of smoke and dust every year. The adoption of a new boiler and straw thermal power technology can competently deal with the three major problems of energy use, environmental protection and farmer’s income increment, which is of great significance to realize the effective cycle of “resource product renewable resource” economy.
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Hernández-Mayoral, Emmanuel, Reynaldo Iracheta-Cortez, Vincent Lecheppe, and Oscar Alfredo Jaramillo Salgado. "Modelling and Validation of a Grid-Connected DFIG by Exploiting the Frequency-Domain Harmonic Analysis." Applied Sciences 10, no. 24 (December 17, 2020): 9014. http://dx.doi.org/10.3390/app10249014.
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Wind Energy Conversion Systems (WECS) based on a Doubly-Fed Induction Generator (DFIG) represent the most common configuration employed in wind turbines. These systems involve injecting harmonic currents toward an electrical grid from a back-to-back power converter, potentially creating voltage distortions. To assess this phenomenon, a case study of a 3 kW DFIG-based wind turbine connected to the electrical grid is presented for analysis in the harmonic domain. Initially, a DFIG-based load flow analysis for determining the operating conditions is tackled at the fundamental frequency. Then, the modelling of a DFIG under steady-state operating conditions at harmonic frequencies is analyzed discussing its characteristics in the harmonic domain. The high-frequency harmonics in the output voltage of a pulse width modulation-driven inverter feeding the rotor windings of a DFIG and its connection to a three-winding transformer are also analyzed. This investigation produced a complete model of the DFIG connected to the electrical grid. The results demonstrated that although a considerable harmonic contribution up to the 25th order exists, it remains harmless since it is below 5%, according to the Std. IEEE 519.
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Meng, Zhichao, Man Zhang, and Hongxian Wang. "CNN with Pose Segmentation for Suspicious Object Detection in MMW Security Images." Sensors 20, no. 17 (September 2, 2020): 4974. http://dx.doi.org/10.3390/s20174974.
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Millimeter-wave (MMW) imaging scanners can see through clothing to form a three-dimensional holographic image of the human body and suspicious objects, providing a harmless alternative for non-contacting searches in security check. Suspicious object detection in MMW images is challenging, since most of them are small, reflection-weak, shape, and reflection-diverse. Conventional detectors with artificial neural networks, like convolution neural network (CNN), usually take the problem of finding suspicious objects as an object recognition task, yielding difficulties in developing large-amount and complete sample sets of objects. In this paper, a new algorithm is developed using the human pose segmentation followed by the deep CNN detection. The algorithm is emphasized to learn the similarity with humans’ body clutter applied to training corresponding CNNs after the image segmentation base of the pose estimation. Moreover, the suspicious object recognition in the MMW image is converted to a binary classification task. Instead of recognizing all sorts of suspicious objects, the CNN detector determines whether the body part images present the abnormal patterns containing suspicious objects. The proposed algorithm that is based on CNN with the pose segmentation has concise configuration, but optimal performance in the suspicious object detection. Extensive experiments confirm the effectiveness and superiority of the proposal.
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Metcalfe, Christopher D., and G. Douglas Haffner. "The ecotoxicology of coplanar polychlorinated biphenyls." Environmental Reviews 3, no. 2 (April 1, 1995): 171–90. http://dx.doi.org/10.1139/a95-008.
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Polychlorinated biphenyls (PCBs) have been recognized for over 25 years as global environmental contaminants. However, many PCB congeners may be relatively harmless, while a small group of PCB congeners are highly toxic to biota. The toxic coplanar PCB congeners are chlorinated at meta positions and at one or none of the ortho positions on the biphenyl ring, thus resembling 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in molecular configuration. In vitro and in vivo toxicity tests with rodents, fish, and birds have shown that the coplanar PCB congener 126 is almost as toxic as TCDD. Several coplanar PCBs (e.g., 77, 126, 105, 118) are present in biota at parts per billion concentrations, which is orders of magnitude higher than concentrations of TCDD. Thus, coplanar PCBs may account for over 95% of the dioxinlike toxic activity affecting biota, such as fish-eating birds in the Great Lakes. There is some evidence that the toxicokinetics of coplanar PCBs in organisms differs from that of other PCB homologues. If coplanar PCBs are more persistent than their homologues, they could become enriched in biota as they pass up through the food chain (i.e., trophic enrichment), or as overall PCB levels decline with time (i.e., temporal enrichment). Overall, the available data do not support the concept of trophic or temporal enrichment in the environment.Key words: polychlorinated biphenyls, coplanar, toxic equivalents, kinetics, mixed function oxidase, 7-ethoxyresorufin-O-deethylase.
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BRODO, LINDA. "On the expressiveness of π-calculus for encoding mobile ambients." Mathematical Structures in Computer Science 28, no. 2 (September 22, 2016): 202–40. http://dx.doi.org/10.1017/s0960129516000256.
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We investigate the expressiveness of two classical distributed paradigms by defining the first encoding of the pure mobile ambient calculus into the synchronous π-calculus. Our encoding, whose correctness has been proved by relying on the notion of operational correspondence, shows how the hierarchical ambient structure can be reformulated within a flat channel interconnection amongst independent processes, without centralised control. To easily handle the computation for simulating a capability, we introduce the notions of simulating trace (representing the computation that a π-calculus process has to execute to mimic a capability) and of aborting trace (representing the computation that a π-calculus process executes when the simulation of a capability cannot succeed). Thus, the encoding may introduce loops, but, as it will be shown, the number of steps of any trace, therefore of any aborting trace, is limited, and the number of states of the transition system of the encoding processes still remains finite. In particular, an aborting trace makes a sort of backtracking, leaving the involved sub-processes in the same starting configurations. We also discuss two run-time support methods to make these loops harmless at execution time. Our work defines a relatively simple, direct, and precise translation that reproduces the ambient structure by means of channel links, and keeps track of the dissolving of an ambient.
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Al-Basri, Majid Abdulatif. "On Lexical Phonology of Zubairi Arabic." International Journal of Linguistics 13, no. 3 (May 9, 2021): 22. http://dx.doi.org/10.5296/ijl.v13i3.18628.
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As its name implies, Lexical Phonology (LP) is a two-sided discipline which is very much pervasive and of a priority for particular interest. It is basically a matter of the systematic correlation of both morphology and phonology as a preliminary to screening endless items and senses. Once postulated and covered with its linguistically theoretical frames, LP has proved attractive, useful and handful in that it turns up so often in such topics as lexical items with their phonological configurations and words with their stratum-based designs. The present paper is a painstaking scrutiny of how LP is thoroughly worked out to demarcate the lexical and phonological boundaries of Zubairi Arabic lexical items with a special reference to the linguistic behavior of affix attachments. It is no doubt a massive task – it is armed with such and such amount of systematization and provided with certain 'harmless looking terms and expressions that are frequently used. In attempt to focus on this point of interaction between phonology and morphology, the paper adopts the line of reasoning that is primarily based on a tabulated description and analysis of examples so as to serve the purposes of setting some comparisons, showing certain contrasts or governing particular rules of applications as far as Zubairi words and expressions are concerned. Among many results the paper has reached is evidently the one that the structure of Zubairi Arabic lexical items is the empirical "container" in which both phonological and morphological lines of representation are sometimes crossed very sharply or sometimes paralleled very endlessly whereby their blurriness may be relative and variable.
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Kaloper, Nemanja. "Troubles with global monopoles in quantum gravity." International Journal of Modern Physics D 31, no. 05 (February 9, 2022). http://dx.doi.org/10.1142/s0218271822500353.
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A theory with a global [Formula: see text] symmetry broken at a scale [Formula: see text] admits topological configurations: global monopoles realized by Goldstone fields winding around the core of false vacuum. One may expect them to behave as heavy, big composite objects, difficult to make and therefore mostly harmless. However, after gravity is turned on, as long as Equivalence Principle holds, one finds that global monopoles have a negative mass, [Formula: see text], where [Formula: see text] is the field theory coupling. This could catalyze an instability in the space of a global monopole, by the production of additional global monopole–antimonopole pairs along with normal particles, leading to energy production ab nihilo, if the pair energy is dominated by their negative rest masses. In a theory with unbroken local Poincaré symmetry, this could lead to a divergent ‘decay rate’ of the global monopole configurations.
Conference papers on the topic "Harmless configuration"
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Dulieu, Pierre, and Valéry Lacroix. "Structural Integrity Assessment of Doel 3 and Tihange 2 RPVs Affected by Hydrogen Flakes: Refined X-FEM Analyses." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63766.
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During the 2012 outage at Doel 3 and Tihange 2 Nuclear Power Plants, specific ultrasonic in-service inspections revealed a large number of quasi-laminar indications in the base metal of the reactor pressure vessels, mainly in the lower and upper core shells. The observed indications could subsequently be attributed to hydrogen flaking induced during the component manufacturing process. As a consequence, a Flaw Acceptability Assessment had to be performed as a part of the Safety Case demonstrating the fitness-for-service of these units. In that framework, detailed analyses using eXtended Finite Element Method were conducted to model the specific character of hydrogen flakes. Their quasi-laminar orientation as well as their high density required setting up 3D multi-flaws model accounting for flaw interaction. These calculations highlighted that even the most penalizing flaw configurations are harmless in terms of structural integrity despite the consideration of higher degradation of irradiated material toughness.
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Slaboch, Paul E., and Jillian Coday. "Design and Analysis of Small Scale Horizontal Archimedean Screw for Electric Power Generation." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-72580.
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A small scale horizontal Archimedean screw was designed, built, and tested for small-scale electric power generation. The small-scale device is suitable for deployment in shallow waterways and rivers. The design of the screw is environmentally friendly and allows for fish and other aquatic life to pass through harmlessly. A series of horizontal screws were designed over a range of blade pitch and tip conditions to determine the most efficient configuration of the device. The tip conditions included straight, flanged, and open. The device was placed both inside and outside of a duct to control tip conditions. The flanged condition added material to the tip of the device to simulate a partially ducted screw. Preliminary studies have shown that the straight bladed screw is the most efficient design. Preliminary data also show that the addition of a duct reduced the overall efficiency of the device. The flange feature on the screw was shown to be ineffective as well. However, the design was environmentally friendly and would provide electric power on a small scale without harm to local aquatic environments.