Perceptron Trees: A Case Study in Hybrid Concept Representations

1989 ◽  
Vol 1 (4) ◽  
pp. 377-391 ◽  
Author(s):  
PAUL E. UTGOFF
Author(s):  
Tao Zhao ◽  
Dan Lee ◽  
Neil Willis ◽  
Hui Qiu ◽  
Marco Puliafito

“Vertical type” spool configuration is commonly adopted as riser base spool for deepwater field development. With increasing water depths and risers subject to harsher environments, the excessive lower riser assembly motions and slugging induced fatigue damage have emerged as the governing design criteria for deepwater riser base spool design. Conventional vertical spool has inherent shortcomings to handle such design conditions. A new “hybrid” concept is therefore proposed, which extends beyond the “traditional” spool concept by integrating both vertical and horizontal spools into a 3D configuration. It inherits the vertical spool’s strength on handling large spatial expansion and utilise the pipe-soil interaction to dampen the potential resonance caused by slug flow. Several prototypes have been examined and the hybrid spool expansion-mechanism is discussed together with an optimisation procedure proposed. An advanced FEA technique using both Abaqus/Flexcom has been employed as part of the hybrid spool development, which consists of rigorous 3D dynamic analysis, bespoke non-linear soil interaction model and utilising the global riser dynamic behaviour. An in-house spool automation tool is developed to optimise the iterative analyses required to obtain a satisfactory hybrid spool configuration. This paper described a successful case study in recent deepwater hybrid riser bundle (multibore hybrid riser) tower development project, where the need to accommodate large lower riser assembly motion and slugging fatigue damage are the two main design drivers. This presentation provides a creative insight into this innovative technology.


2020 ◽  
Vol 46 (2) ◽  
pp. 103-116
Author(s):  
Adrianus Leo Liem ◽  
Adrianus Leo Liem ◽  
Budi Prayitno

The hybrid concept that develops in urban community settlements in an unplaning manner has led to various forms of settlement patterns that are adapted to social, economic and environmental conditions. This hybridity condition is potential for more innovative settlement consolidation efforts. This research was conducted to examine the quality of the hybridity formed in urban village settlements in Sindulang Satu Village, Manado, and to find the consolidation principle of settlement patterns by developing hybridity values at the site location. The quality of the hybridity was examined based on the perspective of programming hybrid, operational hybrid and spatial hybrid. This study used a qualitative research method, with modeling and experimental simulation technique approach. The analysis of settlement space performance was done by statistical calculations and graphical analysis using space syntax method. The research data was obtained using questionnaire, interviews and observations methods of samples that met the criteria of purposive sampling. The results of this study showed the potential of the hybridity in site locations with good quality, so that it became a consideration in formulating the principle of settlement pattern consolidation to increase site hybridity.


Author(s):  
Evangelia Spiliopoulou ◽  
Artidoro Pagnoni ◽  
Eduard Hovy

PARADIGMA ◽  
2020 ◽  
pp. 112-138
Author(s):  
Nehemías Moreno Martínez ◽  
Luis Enrique Hernández Zavala

Se propone una interpretación de la técnica de representación del Mapa Conceptual Híbrido a partir de la extensión a la química escolar de algunos elementos teóricos del Enfoque Ontosemiótico de la Matemática Educativa. Para mostrar la viabilidad de la propuesta, se planteó el objetivo de analizar de manera gráfica, mediante un estudio de casos de carácter descriptivo, el sistema de prácticas implicado en la resolución de un problema químico, por parte de un docente y uno de sus estudiantes, que implicaba el uso del concepto de reactivo limitante. El análisis muestra que, en la resolución del problema, los sujetos se apoyan en objetos químicos como en objetos de tipo químico-matemático, los cuales son conectados y organizados en el sistema de prácticas; el docente llevó a cabo un sistema de prácticas predominantemente interpretativo mientras que el alumno realizó uno mayormente operativo; los sujetos también realizaron cierto conjunto de procesos cognitivos que se encuentran implicados en la producción del conocimiento químico.Palabras clave: Mapa conceptual híbrido, resolución de problemas, reactivo limitante, química escolar, objetos químico-matemáticos.Análise gráfica da resolução de um problema químico de reagente limitanteResumo: É proposta uma interpretação da técnica de representação do Mapa Conceitual Híbrido a partir da extensão à química escolar de alguns elementos teóricos da Abordagem Ontosemiótica à Matemática Educacional. Para mostrar a viabilidade da proposta, o objetivo foi analisar graficamente, por meio de um estudo de caso descritivo, o sistema de prática envolvido na resolução de um problema químico, por um professor e um de seus alunos. , o que implicou na utilização do conceito de reagente limitante. A análise mostra que, para resolver o problema, os sujeitos contam com objetos químicos, bem como objetos químico-matemáticos, que estão conectados e organizados no sistema de prática; o professor realizou um sistema de prática predominantemente interpretativo, enquanto o aluno realizou um sistema predominantemente operacional; os sujeitos também realizaram um determinado conjunto de processos cognitivos que estão envolvidos na produção do conhecimento químico.Palavras-chave: Mapa conceitual híbrido, solução de problemas, reagente limitante, química escolar, objetos químico-matemáticos.Graphical analysis of the resolution of a limiting reagent problemAbstract: An interpretation of the representation technique of the Hybrid Concept Map is proposed from the extension to the school chemistry of some theoretical elements of the Ontosemiotic Approach of Educational Mathematics. In order to show the viability of the proposal, the objective was raised to analyze graphically, through a descriptive case study, the system of practices involved in solving a chemical problem posed in a textual way, by a teacher and one of his students, which involved the use of the concept of limiting reagent. The analysis shows that, in solving the problem, the subjects rely on chemical and chemical-mathematical objects, which are connected and organized in the system of practices; the teacher carried out a predominantly interpretive practice system while the student carried out an operational one; subjects also perform a certain set of cognitive processes that are involved in the production of chemical knowledge.Keywords: Hybrid conceptual map, problem solving, limiting reagent, schoolar chemistry, chemical-mathematical objects.


2014 ◽  
Vol 38 (01) ◽  
pp. 102-129
Author(s):  
ALBERTO MARTÍN ÁLVAREZ ◽  
EUDALD CORTINA ORERO

AbstractUsing interviews with former militants and previously unpublished documents, this article traces the genesis and internal dynamics of the Ejército Revolucionario del Pueblo (People's Revolutionary Army, ERP) in El Salvador during the early years of its existence (1970–6). This period was marked by the inability of the ERP to maintain internal coherence or any consensus on revolutionary strategy, which led to a series of splits and internal fights over control of the organisation. The evidence marshalled in this case study sheds new light on the origins of the armed Salvadorean Left and thus contributes to a wider understanding of the processes of formation and internal dynamics of armed left-wing groups that emerged from the 1960s onwards in Latin America.


2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Lifshitz ◽  
T. M. Luhrmann

Abstract Culture shapes our basic sensory experience of the world. This is particularly striking in the study of religion and psychosis, where we and others have shown that cultural context determines both the structure and content of hallucination-like events. The cultural shaping of hallucinations may provide a rich case-study for linking cultural learning with emerging prediction-based models of perception.


2019 ◽  
Vol 42 ◽  
Author(s):  
Daniel J. Povinelli ◽  
Gabrielle C. Glorioso ◽  
Shannon L. Kuznar ◽  
Mateja Pavlic

Abstract Hoerl and McCormack demonstrate that although animals possess a sophisticated temporal updating system, there is no evidence that they also possess a temporal reasoning system. This important case study is directly related to the broader claim that although animals are manifestly capable of first-order (perceptually-based) relational reasoning, they lack the capacity for higher-order, role-based relational reasoning. We argue this distinction applies to all domains of cognition.


2019 ◽  
Vol 42 ◽  
Author(s):  
Penny Van Bergen ◽  
John Sutton

Abstract Sociocultural developmental psychology can drive new directions in gadgetry science. We use autobiographical memory, a compound capacity incorporating episodic memory, as a case study. Autobiographical memory emerges late in development, supported by interactions with parents. Intervention research highlights the causal influence of these interactions, whereas cross-cultural research demonstrates culturally determined diversity. Different patterns of inheritance are discussed.


Author(s):  
D. L. Callahan

Modern polishing, precision machining and microindentation techniques allow the processing and mechanical characterization of ceramics at nanometric scales and within entirely plastic deformation regimes. The mechanical response of most ceramics to such highly constrained contact is not predictable from macroscopic properties and the microstructural deformation patterns have proven difficult to characterize by the application of any individual technique. In this study, TEM techniques of contrast analysis and CBED are combined with stereographic analysis to construct a three-dimensional microstructure deformation map of the surface of a perfectly plastic microindentation on macroscopically brittle aluminum nitride.The bright field image in Figure 1 shows a lg Vickers microindentation contained within a single AlN grain far from any boundaries. High densities of dislocations are evident, particularly near facet edges but are not individually resolvable. The prominent bend contours also indicate the severity of plastic deformation. Figure 2 is a selected area diffraction pattern covering the entire indentation area.


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