Academic literature on the topic 'Evolution of principles'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Evolution of principles.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Evolution of principles"

1

Boesch, Christophe. "Principles of human evolution." Journal of Evolutionary Biology 12, no. 1 (January 1999): 198. http://dx.doi.org/10.1046/j.1420-9101.1999.0002i.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Xue, Y. "Principles of human evolution." Heredity 94, no. 2 (January 27, 2005): 271. http://dx.doi.org/10.1038/sj.hdy.6800579.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Behera, Narayan. "Variational principles in evolution." Bulletin of Mathematical Biology 58, no. 1 (January 1996): 175–202. http://dx.doi.org/10.1007/bf02458287.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Stoll, Claude. "Principles of Human Evolution." Annales de Génétique 47, no. 1 (January 2004): 104. http://dx.doi.org/10.1016/j.anngen.2004.02.002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Behera, N. "Variational principles in evolution." Bulletin of Mathematical Biology 58, no. 1 (January 1996): 175–202. http://dx.doi.org/10.1016/0092-8240(95)00316-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Crow, James F. "Some optimality principles in evolution." Behavioral and Brain Sciences 14, no. 2 (June 1991): 218–19. http://dx.doi.org/10.1017/s0140525x00066206.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Prud'homme, B., N. Gompel, and S. B. Carroll. "Emerging principles of regulatory evolution." Proceedings of the National Academy of Sciences 104, Supplement 1 (May 9, 2007): 8605–12. http://dx.doi.org/10.1073/pnas.0700488104.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Wilson, Peter J., and C. R. Hallpike. "The Principles of Social Evolution." Man 23, no. 3 (September 1988): 584. http://dx.doi.org/10.2307/2803296.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Wichert, Andrzej. "Principles of Quantum-like Evolution." Open Systems & Information Dynamics 26, no. 02 (June 2019): 1950007. http://dx.doi.org/10.1142/s1230161219500070.

Full text
Abstract:
We present a case study of quantum-like probabilities that are motivated by quantum cognition. We introduce quantum-like evolution that is l2 norm preserving but in which the matrix does not need to be unitary. We show how to map any 2 × 2 stochastic matrix to an l2 norm preserving balanced phase matrix that maps real vectors of length one into complex vectors of length one. Quantum-like evolution can simulate a probability distribution of open system in which the operator is not unitary but norm preserving. Such a kind of behaviour is studied in quantum cognition. By tensor product higher dimensional balanced phase matrices can be built. Quantum-like evolution can simulate either unitary open one by coding the phase of input vector into the phase of a balanced phase matrix, a Markov chain or an alternative evolution that can lead to fixed, periodic or chaotic behaviour resulting in strange oscillations.
APA, Harvard, Vancouver, ISO, and other styles
10

Simmons, Jack, Duong Vo, and Gene Mesco. "The Universal Principles of Evolution." World Futures 70, no. 7 (October 3, 2014): 426–41. http://dx.doi.org/10.1080/02604027.2014.977644.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Evolution of principles"

1

Kerce, James Clayton. "Geometric problems relating evolution equations and variational principles." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/28739.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kouvaris, Konstantinos. "How evolution learns to evolve : principles of induction in the evolution of adaptive potential." Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/423467/.

Full text
Abstract:
Explaining how organisms can exhibit suitable phenotypic variation to rapidly adapt to novel environmental conditions is central in evolutionary biology. Although such variability is crucial for the survival of a lineage and its adaptive potential, it remains poorly understood. Recent theory suggests that organisms can evolve designs that help them generate novel features that are more likely to be beneficial. This is possible when the environments that the organisms are exposed to share common regularities. Selection though cannot favour phenotypes for fitness benefits that have not yet been realised. Such capacity implies that natural selection has a form of foresight, which is inconsistent with the existing evolutionary theory. It is unclear why selection would favour flexible biological structures in the present environments that promote beneficial phenotypic variants in the future, previously unseen environments. In this thesis, I demonstrate how organisms can systematically evolve designs that enhance their evolutionary potential for future adaptation relying on insights from learning theory. I investigate how organisms can predispose the production of useful phenotypic variation that helps them cope with environmental variability within and across generations, either through genetic mutation or environmental induction. I find that such adaptive capacity can arise as an epiphenomenon of past selection towards target optima in different selective environments without a need for a direct or lineage selection. Specifically, I resolve the tension between canalisation of past selected targets and anticipation of future environments by recognising that induction in learning systems merely requires the ability to represent structural regularities in previously seen situations that are also true in the yet-unseen ones. In learning systems, such generalisation ability is neither mysterious, nor taken for granted. Understanding the evolution of developmental biases as a form of model learning and adaptive plasticity as task learning can provide valuable insights into the mechanistic nature of the evolution of adaptive potential and the evolutionary conditions promoting it.
APA, Harvard, Vancouver, ISO, and other styles
3

Shen, Yanfen. "A formal ontology for data mining : principles, design, and evolution." Thèse, Trois-Rivières : Université du Québec à Trois-Rivières, 2007. http://www.uqtr.ca/biblio/notice/resume/30004656R.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Elderfield, James Alexander David. "Using epidemiological principles and mathematical models to understand fungicide resistance evolution." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275061.

Full text
Abstract:
The use of agricultural fungicides exerts very strong selection pressures on plant pathogens. This can lead to the spread of fungicide resistance in the pathogen population, which leads to a reduction in efficacy of disease control and loss of yield. In this thesis, we use mathematical modelling to investigate how the spread of fungicide resistant pathogen strains can be slowed, using epidemiological models to understand how application strategies can be optimised. A range of different fungicide application strategies have been proposed as anti-resistance strategies. Two of the most often considered strategies rely on combining two fungicides with different modes of action. The first involves spraying the two fungicides at the same time (mixture) and the second spraying them alternately at different times (alternation). These strategies have been compared both experimentally and by mathematical modellers for decades, but no firm conclusion as to which is better has been reached, although mixtures have in general often been favoured. We use mathematical models of septoria leaf blotch (Zymoseptoria tritici) on winter wheat and powdery mildew on grapevine (Erysiphe necator) to investigate the relative performance of these two strategies. We show that depending on the exact way in which the strategies are compared and the exact case, either strategy can be the more effective. However, when aiming to optimise yield in the long-term, we show that mixtures are very likely to be the most effective strategy in any given case. The structure of mathematical models clearly impacts on the conclusions of those models. As well as investigating the sensitivity of our conclusions to the structure of the models, we use a range of nested models to isolate mechanisms driving the differential performance of fungicide mixtures and alternation. Although the fine detail of a model’s predictions depends on its exact structure, we find a number of conserved patterns. In particular we find no case in which mixtures do not produce the overall largest yield over the time for which the fungicide remains effective. We also investigate the effects of the timing of an individual fungicide spray on its contribution toward resistance development and disease control. A set of so-called “governing principles” to understand the performance of resistance-management strategies was recently introduced by van den Bosch et al., formalising concepts from earlier literature. These quantify selection rates by examining the difference between the growth rates of fungicide-sensitive and fungicide resistant pathogen strains. Throughout the thesis, we concentrate on the extent to which these governing principles can be used to explain the relative performance of the resistance-management strategies that are considered.
APA, Harvard, Vancouver, ISO, and other styles
5

Binder, Bernd. "Design principles and control mechanisms of signal transduction networks." Doctoral thesis, [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975655868.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Yesilyurt, Yasar. "Evolution of total quality management principles and their implementation in high schools." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/5447.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Dibartolomeo, Theresa. "The evolution of U.S. generally accepted accounting principles and its current and future status /." Staten Island, N.Y. : [s.n.], 2005. http://library.wagner.edu/theses/business/2005/thesis_bus_2005_dibar_evolu.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Manuse, Jennifer E. "The strategic evolution of systems : principles and framework with applications to space communication networks." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54603.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2009.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. [369]-377).
Complex systems in operation are constrained by legacy; in other words, the existing properties, structure, components, protocols, software, people and etc. that are inherited over time. This inheritance heavily influences the type and timing of feasible and available changes to the system, the effectiveness and desirability of their impact while accounting for uncertainty, and the future constraints imposed as a result. This thesis introduces the Strategic Evolution of Systems, a novel framework for evolving complex systems that directly addresses legacy challenges during system operation within the context of space communication networks. The framework - perspective, position, plan and pattern - is based on Mintzberg's "emergent" interpretation of strategy. This thesis also presents several unique ideas including the concept of option lock-out, or the tendency to lose access to potentially desirable regions of the architectural space when exercising a transition; an energy analogy to model static architecture value; an entropy-based formulation to evaluate the desirability, or dynamic multidimensional value, of an architecture by considering the structural and temporal space of possible transitions; and the application of the entropy-based formulation to define the overall desirability of an architecture as its position, or current situation (favorable or unfavorable) relative to accessible alternatives, in order to identify the most advantageous immediate transition. A key contribution of this thesis is a method to value legacy in a physical non-market traded system, including a demonstration of its application to a system in which benefits and costs are nonmonetary in nature.
(cont.) Other important contributions include a change exposure tool, referred to as a Strategic Advantage Map, to visualize the near- and long-term impact of immediate transitions relative to legacy. Here, an architecture's position relative to the legacy system can be thought of as the region of entropy space it occupies (evaluated over time and uncertainty). The more dominating this region of position entropy is, the more desirable the architecture. For monetary-based systems, a second change exposure tool includes an "Iceberg Exposure,"which maps the exposure of net present value for each accessible transition option relative to a neutral no-gain-no-loss line, resulting in a graph resembling an iceberg. The visualization tools allow decision makers to quickly evaluate the impact (risk/opportunity) of change, based on their concept of desirability. Case studies include a historical look at the NASA Deep Space Network for insight into legacy and complex system evolution, a demonstration of the Strategic Evolution of Systems framework for a global commercial satellite communication system, and an illustration of the method extended to non-monetary systems for the deployment of communication assets to support manned exploration of Earth's moon. The satellite system case study introduces an extended market model that evaluates the attainable business segments in a global satellite communications system by integrating estimates of the global distribution of market demand, observed traffic statistics, and calculations of the resulting steady-state network performance.
(cont.) This thesis will show how to use the framework and principles for evaluating a system's current position as well as how to update the evaluation as time progresses. The satellite communication case study will provide one example where the methodology enables identification of the optimal transition path over the system's operational life. It will become evident that the choice of horizon time and the use of debiasing factors can have significant influence on the results. Future study on properly identifying and constructing these variables is strongly recommended. Finally, the ideas and tools presented in this thesis may be used to compare preferred systems to suggested alternatives in order to justify expenditures or to initiate research and development programs.
by Jennifer E. Manuse.
Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
9

Nyström, Dag. "The UN mission in Congo and the basic principles of peacekeeping : revolution or evolution?" Thesis, Stockholms universitet, Juridiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-127731.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Orji, Peter. "The evolution of a regulatory framework for e-commerce formation : metamorphosis of traditional contract principles." Thesis, University of Reading, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567593.

Full text
Abstract:
This research, entitled The Evolution of a Regulatory Framework for E-commerce: Metamorphosis of Traditional Contract Principles, is set against the background of the general question whether there is the need for a whole new legal structure for contract formation in the on line environment, or if the existing traditional laws of contract are sufficient by adapting the current provisions to cyber space. In the first chapter, the research examines the context of e-contract, laying a foundation for the analysis of the legal framework through which electronic business transactions are conducted. The research covers matters such as the rudimentary use of the prefix e as an attempt to translate commerce from its traditional form to its cyber-based equivalent. This chapter also explores a description of the technological infrastructure for various avenues of e-commerce. Chapter Two provides a functional definition of the law of e-commerce. From the proposal that the virtual world is completely devoid of law to the view that it is too strictly regulated, this chapter examines whether or not there can be a legal mechanism for governing businesses online - as distinct from the general law of contract - what that mechanism might be, and the efficacy of any such law. In Chapter Three a model of a virtual contract formed by the use of electronic media is examined. This model of contract formation is aided by importing the rules of traditional contract into the virtual shop. The contract rules are tested for relevance and applicability in the online environment. Chapter Four deals with a crucial feature of many online contracts: 'standard forms'. It answers the question whether there is anything significantly different from the day-to-day standard form paper contracts when these contracts are formed and/or executed online. In Chapter Five the concept of a separate legal personality for automated agents is discussed. There is an analogous review of the creation of personality from other non-human v legal persons. Signature and other authenticating means as key to contract formation, though not necessarily ingredients for determining validity, are discussed. In Chapter Six the research explores the relevance and increased use of authentication features like pin numbers, biometrics and e-signatures, particularly the legal aspects of electronic signatures (statutory requirements, practical problems with their use, and case law response to the use of electronic signatures). Finally the work turns to the core issues surrounding complex e-commerce transactions: choosing a forum for the adjudication of disputes. The work, while dealing with keys aspects of contract, moves from the traditional contract form to contracts in the virtual environment, and questions the applicability of the existing law, then proposes an approach specific to the uniqueness of the online market.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Evolution of principles"

1

Meyer-Ortmanns, Hildegard, and Stefan Thurner, eds. Principles of Evolution. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18137-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Evolution: Principles and processes. Sudbury, Mass: Jones and Bartlett, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Principles of social evolution. Oxford: Oxford University Press, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Cabej, Nelson R. Epigenetic Principles of Evolution. Burlington: Elsevier Science, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Epigenetic principles of evolution. London: Elsevier, 2012.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Hallpike, C. R. The principles of social evolution. Oxford [England]: Clarendon Press, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Hallpike, C. R. The principles of social evolution. Oxford [Oxfordshire]: Clarendon Press, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Herbert, Spencer. First principles. Cambridge: Cambridge University Press, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Morley, Lawrence W. E.O.S.S.H.A.: The principles of unity. Redcar: Onex, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Bodenheimer, Peter. Principles of star formation. Berlin: Springer, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Evolution of principles"

1

Sherman, Howard J., Michael A. Meeropol, and Paul D. Sherman. "Evolution of Capitalism." In Principles of Macroeconomics, 10–23. Second edition. | Abingdon, Oxon; NewYork, NY: Routledge, 2019.: Routledge, 2018. http://dx.doi.org/10.4324/9781351232111-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ghanea-Hercock, Robert. "Principles of Natural Evolution." In Applied Evolutionary Algorithms in Java, 19–26. New York, NY: Springer New York, 2003. http://dx.doi.org/10.1007/978-0-387-21615-7_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Schuster, Peter. "Physical Principles of Evolution." In The Frontiers Collection, 45–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-18137-5_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Spector, Sheila A. "The Foundational Principles." In The Evolution of Blake’s Myth, 84–131. New York : Routledge, 2020. | Series: Routledge studies in romanticism: Routledge, 2020. http://dx.doi.org/10.4324/9781351108430-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Blum, Reinhard, and Peter Welzel. "Principles of Economic Policy in the Common Market." In Market Evolution, 317–32. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8428-9_19.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Koonin, Eugene V., and Michael Y. Galperin. "Principles and Methods of Sequence Analysis." In Sequence — Evolution — Function, 111–92. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4757-3783-7_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Luo, Liqun. "Evolution of the Nervous System." In Principles of Neurobiology, 547–90. Second edition. | Boca Raton : Garland Science, 2020.: Garland Science, 2020. http://dx.doi.org/10.1201/9781003053972-13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Witt, Ulrich. "Evolutionary economics: Some principles." In Evolution in Markets and Institutions, 1–16. Heidelberg: Physica-Verlag HD, 1993. http://dx.doi.org/10.1007/978-3-642-50065-7_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Varga, Ervin. "Context, Rules, and Principles." In Unraveling Software Maintenance and Evolution, 17–29. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-71303-8_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ratner, Vadim A., Andrey A. Zharkikh, Nikolay Kolchanov, Sergey N. Rodin, Viktor V. Solovyov, and Andrey S. Antonov. "The Principles of the Origin and Evolution of Genomes." In Molecular Evolution, 201–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-662-12530-4_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Evolution of principles"

1

Aoyama, Mikio, Katsuro Inoue, and Václav Rajlich. "Principles of software evolution." In the 24th international conference. New York, New York, USA: ACM Press, 2002. http://dx.doi.org/10.1145/581339.581430.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

"Laws and principles of evolution." In Proceedings International Conference on Software Maintenance. IEEE, 2002. http://dx.doi.org/10.1109/icsm.2002.1167751.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Zheng, Weijie, Guangwen Yang, and Benjamin Doerr. "Working principles of binary differential evolution." In GECCO '18: Genetic and Evolutionary Computation Conference. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3205455.3205623.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

"Proceedings International Symposium on Principles of Software Evolution." In Proceedings International Symposium on Principles of Software Evolution. IEEE, 2000. http://dx.doi.org/10.1109/ispse.2000.913214.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Beyer, Hans-Georg. "Design principles for matrix adaptation evolution strategies." In GECCO '20: Genetic and Evolutionary Computation Conference. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3377929.3389870.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Birman, Ken. "Evolution of fault tolerance." In SOSP '15: ACM SIGOPS 25th Symposium on Operating Systems Principles. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2830903.2830908.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

"7th International Workshop on Principles of Software Evolution." In Proceedings. 7th International Workshop on Principles of Software Evolution. IEEE, 2004. http://dx.doi.org/10.1109/iwpse.2004.1334757.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

"7th International Workshop on Principles of Software Evolution." In Proceedings. 7th International Workshop on Principles of Software Evolution, 2004. IEEE, 2004. http://dx.doi.org/10.1109/iwpse.2004.1334755.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

"Index of Authors." In Proceedings International Symposium on Principles of Software Evolution. IEEE, 2000. http://dx.doi.org/10.1109/ispse.2000.913255.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

"Proceedings. 7th International Workshop on Principles of Software Evolution." In Proceedings. 7th International Workshop on Principles of Software Evolution. IEEE, 2004. http://dx.doi.org/10.1109/iwpse.2004.1334754.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Evolution of principles"

1

Roye, Thorsten. Unsettled Technology Areas in Deterministic Assembly Approaches for Industry 4.0. SAE International, August 2021. http://dx.doi.org/10.4271/epr2021018.

Full text
Abstract:
Increased production rates and cost reduction are affecting manufacturing in all sectors of the mobility industry. One enabling methodology that could achieve these goals in the burgeoning “Industry 4.0” environment is the deterministic assembly (DA) approach. The DA approach is defined as an optimized assembly process; it always forms the same final structure and has a strong link to design-for-assembly and design-for-automation methodologies. It also looks at the whole supply chain, enabling drastic savings at the original equipment manufacturer (OEM) level by reducing recurring costs and lead time. Within Industry 4.0, DA will be required mainly for the aerospace and the space industry, but serves as an interesting approach for other industries assembling large and/or complex components. In its entirety, the DA approach connects an entire supply chain—from part manufacturing at an elementary level to an OEM’s final assembly line level. Addressing the whole process of aircraft design and manufacturing is necessary to develop further collaboration models between OEMs and the supply chain, including addressing the most pressing technology challenges. Since all parts aggregate at the OEM level, the OEM—as an integrator of all these single parts—needs special end-to-end methodologies to drastically decrease cost and lead time. This holistic approach can be considered in part design as well (in the design-for-automation and design-for-assembly philosophy). This allows for quicker assembly at the OEM level, such as “part-to-part” or “hole-to-hole” approaches, versus traditional, classical assembly methods like manual measurement or measurement-assisted assembly. In addition, it can increase flexibility regarding rate changes in production (such as those due to pandemic- or climate-related environmental challenges). The standardization and harmonization of these areas would help all industries and designers to have a deterministic approach with an end-to-end concept. Simulations can easily compare possible production and assembly steps with different impacts on local and global tolerances. Global measurement feedback needs high-accuracy turnkey solutions, which are very costly and inflexible. The goal of standardization would be to use Industry 4.0 feedback and features, as well as to define several building blocks of the DA approach as a one-way assembly (also known as one-up assembly, or “OUA”), false one-way assembly, “Jig-as-Master,” etc., up to the hole-to-hole assembly approach. The evolution of these assembly principles and the link to simulation approaches are undefined and unsolved domains; they are discussed in this report. They must be discussed in greater depth with aims of (first) clarifying the scope of the industry-wide alignment needs and (second) prioritizing the issues requiring standardization. NOTE: SAE EDGE™ Research Reports are intended to identify and illuminate key issues in emerging, but still unsettled, technologies of interest to the mobility industry. The goal of SAE EDGE™ Research Reports is to stimulate discussion and work in the hope of promoting and speeding resolution of identified issues. SAE EDGE™ Research Reports are not intended to resolve the challenges they identify or close any topic to further scrutiny.
APA, Harvard, Vancouver, ISO, and other styles
2

Willi, Joseph, Keith Stakes, Jack Regan, and Robin Zevotek. Evaluation of Ventilation-Controlled Fires in L-Shaped Training Props. UL's Firefighter Safety Research Institute, October 2016. http://dx.doi.org/10.54206/102376/mijj9867.

Full text
Abstract:
Investigations of recent firefighter line of duty deaths caused by rapid fire progression have highlighted a deficiency in firefighters’ understanding of how certain tactics affect the fire dynamics of ventilation-controlled fires. Many fires are in a ventilation-limited, decay state by the time firefighters arrive at the scene, meaning that introducing additional ventilation to the environment has the potential to cause rapid and intense fire growth. To more effectively teach firefighters about the potential effects of ventilation on a compartment fire, ventilation-controlled fires should be gener- ated during training. Safely creating such fires while maintaining compliance with NFPA 1403: Standard on Live-Fire Training Evolutions allows instructors to educate students on this important principle of fire dynamics in the training environment. Structures utilized for live-fire training have evolved from typical concrete burn buildings to now include smaller purpose-built props, like those constructed from steel shipping containers or wood and gypsum board. Such props have been embraced by organizations due to their cost-effectiveness and potential to improve fire behavior training. Obtaining a thorough understanding of the capa- bilities and limitations of such props is critical for instructors to convey accurate messages during training and properly prepare firefighters for scenarios they’ll encounter in the field. Experiments were conducted to quantify the fire environment in L-shaped props with different wall constructions. One prop had an interior wall lining of gypsum board over wood studs and fiberglass insulation. The two other props were constructed from metal shipping containers with corrugated steel walls; one had ceilings and walls comprised solely of the corrugated steel, while the other had ceilings and walls comprised of rolled steel sheeting over mineral wool insulation with the corrugated steel wall as its backing. Three fuel packages were compared between the props: one contained furnishings mainly composed of synthetic materials and foam plastics; another contained wooden pallets and straw; and the third contained wooden pallets, straw, and oriented strand board (OSB). A stochastic approach was used to compare data between replicate tests and quantify the repeatability of the different props and fuel packages, all of which were deemed sufficiently repeatable. Comparisons of data between the three props revealed that thermal conditions between experiments in the two metal props were indistinguishable, suggesting that the additional layer of insulation did not significantly alter the fire environment. Additionally, thermal conditions in the gypsum-lined prop were more severe than those in the metal props. The effects of ventilation changes on fire conditions were also analyzed across various prop and fuel load combinations. Lastly, the response of the thermal environment in each prop during interior suppression was evaluated, and the results implied that the thermal exposure to the firefighter was more severe in the metal props than the gypsum prop for a brief period following the start of suppression.
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography