Principles and Practice of PPFM (Practical Program of Forces Modeling)

dc.contributor.advisorErmias Kebreab
dc.contributor.authorManoel Garcia Neto
dc.contributor.institutionAnimal Nutrition & Environment Modeling Applications Laboratory (ANEMAL) / UC Davis
dc.date.accessioned2024-08-13T19:20:16Z
dc.date.available2024-08-13T19:20:16Z
dc.date.issued2020-01-10
dc.descriptionThe Practical Program for Forces Modeling (PPFM) spreadsheet is an innovative tool that analyzes the growth process and its history (phases and strategies). The biggest differential is in unfolding the evaluation according to the Newtonian point of view. To do so, the PPFM begins it process in a traditional way, by adjusting growth curves using the least square method, with subsequent unfolding of derivatives. The first derivative represents velocity and the second derivative characterizes acceleration. From this, its prerogative arises, the Newtonian phase of the evaluation, through the well-known formula F = m × a allows to define with great precision the transition between eight possible phases (lag, log up, linear, log down, plateau, death, spurt and resilience), which represent the most favorable strategies to follow this path. Finally, the spreadsheet calculates another novelty, the useful work (action = energy × time) necessary to promote the growth process according to the period of time evaluated. https://repositorio.unesp.br/bitstreams/2d6b3f27-7016-4bbe-8038-a0dd13e48467/download
dc.description.abstractThe PPFM makes it possible to apply, in a practical way, the laws of physics in biology, through the modeling of growth curves and their derivatives (velocity and acceleration). The principle of action allows us to evaluate how much free energy was used to perform useful work (growth expansion), that is, living organisms have their limits of growth (endpoint), while biologically useful work. As with combustion engines, useful work can be offered as deterministic if there are no changes in the energy value over time. However, if energy is time dependent, action must be determined as integral. This allows to evaluate the performance efficiency of the work carried out that makes possible the accumulation of biomass. The action (energy × time) allows to explore concepts of physics, to clarify biological phenomena, offering a common basis for theoretical biological physics in its most fundamental aspects. Thus, the PPFM worksheet allows to present in a practical way, the establishment of the first law of biology, contributing to the evaluation of growth expansion, allowing a new approach, which in a refined way unifies physics to biology, allowing more understanding of the most basic attributes of nature.en
dc.description.abstractO PPFM possibilita aplicar, de forma prática, as leis da física na biologia, por meio da modelagem de curvas de crescimento e suas derivadas (velocidade e aceleração). O princípio da ação permite avaliar quanta energia livre foi utilizada para realizar trabalho útil (expansão do crescimento), ou seja, os organismos vivos têm seus limites de crescimento (ponto final), enquanto trabalho biologicamente útil. Tal como acontece com os motores de combustão, o trabalho útil pode ser oferecido como determinístico se não houver alterações no valor energético ao longo do tempo. Contudo, se a energia depende do tempo, a ação deve ser determinada como integral. Isto permite avaliar a eficiência de desempenho do trabalho realizado que possibilita o acúmulo de biomassa. A ação (energia × tempo) permite explorar conceitos da física, esclarecer fenômenos biológicos, oferecendo uma base comum para a física biológica teórica nos seus aspectos mais fundamentais. Assim, a planilha do PPFM permite apresentar de forma prática, o estabelecimento da primeira lei da biologia, contribuindo para a avaliação da expansão do crescimento, permitindo uma nova abordagem, que de forma refinada unifica a física à biologia, permitindo maior compreensão do atributos mais básicos da natureza.pt
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 18/19629-0.
dc.identifier.citationGARCIA-NETO, M.; KEBREAB, E.; FARIA-JUNIOR, MJA. PPFM: Practical Program for Forces Modeling (2020). In: <https://sites.google.com/view/ppfm-spreadsheet/>
dc.identifier.doi.
dc.identifier.lattes7357560220449194
dc.identifier.orcid0000-0002-5574-0183
dc.identifier.urihttps://hdl.handle.net/11449/257028
dc.language.isoeng
dc.publisherUniversidade Estadual Paulista (Unesp)
dc.relationhttps://repositorio.unesp.br/items/ec5d3a69-0a08-4218-9a83-2ac2b2a6865f
dc.relation.ispartof.
dc.rights.accessRightsAcesso abertopt
dc.subjectGrowth expansion modeling, Growth model, Mathematical modeling.en
dc.titlePrinciples and Practice of PPFM (Practical Program of Forces Modeling)
dc.title.alternativePrincípios e Práticas da planilha PPFM (Practical Program of Forces Modeling)pt
dc.typeRelatório de pós-docpt
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária, Araçatubapt
unesp.embargoOnlinept

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