Generalized partial differential equations for interactive design

This paper presents a method for interactive design by means of extending the PDE based approach for surface generation. The governing partial differential equation is generalized to arbitrary order allowing complex shapes to be designed as single patch PDE surfaces. Using this technique a designer has the flexibility of creating and manipulating the geometry of shape that satisfying an arbitrary set of boundary conditions. Both the boundary conditions which are defined as curves in 3-space and the spine of the corresponding PDE are utilized as interactive design tools for creating and manipulating geometry intuitively. In order to facilitate interactive design in real time, a compact analytic solution for the chosen arbitrary order PDE is formulated. This solution scheme even in the case of general boundary conditions satisfies exactly the boundary conditions where the resulting surface has an closed form representation allowing real time shape manipulation. In order to enable users to appreciate the powerful shape design and manipulation capability of the method, we present a set of practical examples

Modelos de negócio e vantagem competitiva: uma abordagem dinâmica

Objective: Demonstrate how the Canvas business model can become dynamic from a conceptual perspective. Methodology/approach: This study is qualitative, descriptive and exploratory, with a theoretical approach, based on the foremost theorists. Originality /Relevance: This study presupposes the importance of strengthening the business model literature on the competitive dynamic perspective. It defines the assumptions of a DMB and differentiates it from a static model. That enables the evaluation of the factors that cause a BMC to become static and thus not equipped to allow a business logic that creates value and generates a competitive advantage. Main results: At the end of the present essay, it is possible to understand, from a theoretical perspective, how the DBM contributes to value creation and the generation of sustainable advantage in high-change environments. Theoretical/methodological contributions: The present study has identified three conceptual assumptions that constitute the DBM. First, there is the design of the business models – interdependence and connection between their constitutive elements. Second, the business models linked to dynamic capabilities. Finally, the search for the capture of value and generation of sustainable competitive advantages by the companies. By those assumptions, it was possible to introduce a conceptual model for DBM and BMC evaluation from the perspective of a dynamic model.Objetivo: Demostrar cómo el modelo de negocio Canvas puede convertirse en dinámico desde una perspectiva conceptual. Metodología / enfoque: El presente estudio es de naturaleza cualitativa, descriptiva y exploratoria, con enfoque teórico, basada en los principales teóricos. Originalidad / Relevancia: Este estudio presupone el fortalecimiento de la literatura de modelo de negocio en la perspectiva de la competitividad dinámica. Se define el modelo de negocio dinámico y lo diferencia de un modelo estático. Esto permite evaluar los factores que hacen que un modelo de negocio se vuelva estático y, por lo tanto, no esté preparado para una lógica de negocios que crea valor y genere una ventaja competitiva. Principales resultados: Al final del ensayo, fue posible entender, desde una perspectiva teórica, que el Modelo de Negocio Dinámico contribuye a la creación de valor y la generación de ventaja sostenible en ambientes de alto cambio. Contribuciones teórico-metodológicas: El presente estudio identificó tres supuestos conceptuales que constituyen el modelo de negocio dinámico. Primero, el diseño de los modelos de negocios - interdependencia y conexión entre sus elementos constitutivos. En segundo lugar, los modelos de negocio vinculados a las capacidades dinámicas. Y por último, la búsqueda por la captura de valor y la generación de ventajas competitivas sostenibles por las empresas. A partir de estas conclusiones, fue posible evaluar el modelo de negocio Canvas en la perspectiva de un modelo dinámico. Palabras clave: Modelos de Negocio; Ventaja Competitiva; Canvas; Enfoque DinámicoObjetivo: Demonstrar como o modelo de negócio Canvas pode se tornar dinâmico a partir de uma perspectiva conceitual. Metodologia / abordagem: Este estudo é de natureza qualitativa, descritiva e exploratória, com abordagem teórica, baseada nos principais teóricos. Originalidade / Relevância: Este estudo pressupõe o fortalecimento da literatura de modelo de negócio na perspectiva da competitividade dinâmica. Ele define modelo de negócio dinâmico e o diferencia de um modelo estático. Isso permite avaliar os fatores que fazem com que um modelo de negócio se torne estático e, portanto, não esteja preparado para uma lógica de negócios que crie valor e gere vantagem competitiva. Principais resultados: No final do ensaio, foi possível entender, a partir de uma perspectiva teórica, que o Modelo de Negócio Dinâmico contribui para a criação de valor e a geração de vantagem sustentável em ambientes de alta mudança. Contribuições teórico-metodológicas: Este estudo identificou três pressupostos conceituais que constituem o modelo de negócio dinâmico. Primeiro, o desenho dos modelos de negócios - interdependência e conexão entre seus elementos constitutivos. Em segundo lugar, os modelos de negócios ligados a capacidades dinâmicas. E por fim, a busca pela captura de valor e geração de vantagens competitivas sustentáveis pelas empresas. A partir dessas conclusões, foi possível avaliar o modelo de negócio Canvas na perspectiva de um modelo dinâmico.Palavras-chave: Modelos de negócio; Vantagem Competitiva; Canvas; Abordagem Dinâmic

Guidelines to compare additive and subtractive manufacturing approaches under the energy demand perspective

In order to characterise the environmental performance of additive manufacturing (AM) processes, comparative analyses are required. Different manufacturing approaches (such as additive and subtractive ones), besides adopting different equipment, use different kinds and amounts of material. Therefore, the material-related flow has to be followed throughout the entire product life. Differences in environmental impact arise at each step of the life cycle: material production, manufacturing, use, disposal, and transportation. A life cycle-based methodology able to take due account of all the factors of influence on the total energy demand for the production of metal components is given in this paper. Decision support tools for identifying the most sustainable manufacturing route (subtractive versus AM-based approaches) are presented for different scenarios. The aim of the present paper is to contribute to the debate concerning the environmental impact characterisation of AM processes

Persistent topology for natural data analysis - A survey

Natural data offer a hard challenge to data analysis. One set of tools is being developed by several teams to face this difficult task: Persistent topology. After a brief introduction to this theory, some applications to the analysis and classification of cells, lesions, music pieces, gait, oil and gas reservoirs, cyclones, galaxies, bones, brain connections, languages, handwritten and gestured letters are shown

New Method for 3D Shape Retrieval

The recent technological progress in acquisition, modeling and processing of 3D data leads to the proliferation of a large number of 3D objects databases. Consequently, the techniques used for content based 3D retrieval has become necessary. In this paper, we introduce a new method for 3D objects recognition and retrieval by using a set of binary images CLI (Characteristic level images). We propose a 3D indexing and search approach based on the similarity between characteristic level images using Hu moments for it indexing. To measure the similarity between 3D objects we compute the Hausdorff distance between a vectors descriptor. The performance of this new approach is evaluated at set of 3D object of well known database, is NTU (National Taiwan University) database.Comment: 10 pages, 5 figures, publication pape

Modelos de negócio e vantagem competitiva: uma abordagem dinâmica

Objective: Demonstrate how the Canvas business model can become dynamic from a conceptual perspective. Methodology/approach: This study is qualitative, descriptive and exploratory, with a theoretical approach, based on the foremost theorists. Originality /Relevance: This study presupposes the importance of strengthening the business model literature on the competitive dynamic perspective. It defines the assumptions of a DMB and differentiates it from a static model. That enables the evaluation of the factors that cause a BMC to become static and thus not equipped to allow a business logic that creates value and generates a competitive advantage. Main results: At the end of the present essay, it is possible to understand, from a theoretical perspective, how the DBM contributes to value creation and the generation of sustainable advantage in high-change environments. Theoretical/methodological contributions: The present study has identified three conceptual assumptions that constitute the DBM. First, there is the design of the business models – interdependence and connection between their constitutive elements. Second, the business models linked to dynamic capabilities. Finally, the search for the capture of value and generation of sustainable competitive advantages by the companies. By those assumptions, it was possible to introduce a conceptual model for DBM and BMC evaluation from the perspective of a dynamic model.Objetivo: Demostrar cómo el modelo de negocio Canvas puede convertirse en dinámico desde una perspectiva conceptual. Metodología / enfoque: El presente estudio es de naturaleza cualitativa, descriptiva y exploratoria, con enfoque teórico, basada en los principales teóricos. Originalidad / Relevancia: Este estudio presupone el fortalecimiento de la literatura de modelo de negocio en la perspectiva de la competitividad dinámica. Se define el modelo de negocio dinámico y lo diferencia de un modelo estático. Esto permite evaluar los factores que hacen que un modelo de negocio se vuelva estático y, por lo tanto, no esté preparado para una lógica de negocios que crea valor y genere una ventaja competitiva. Principales resultados: Al final del ensayo, fue posible entender, desde una perspectiva teórica, que el Modelo de Negocio Dinámico contribuye a la creación de valor y la generación de ventaja sostenible en ambientes de alto cambio. Contribuciones teórico-metodológicas: El presente estudio identificó tres supuestos conceptuales que constituyen el modelo de negocio dinámico. Primero, el diseño de los modelos de negocios - interdependencia y conexión entre sus elementos constitutivos. En segundo lugar, los modelos de negocio vinculados a las capacidades dinámicas. Y por último, la búsqueda por la captura de valor y la generación de ventajas competitivas sostenibles por las empresas. A partir de estas conclusiones, fue posible evaluar el modelo de negocio Canvas en la perspectiva de un modelo dinámico. Palabras clave: Modelos de Negocio; Ventaja Competitiva; Canvas; Enfoque DinámicoObjetivo: Demonstrar como o modelo de negócio Canvas pode se tornar dinâmico a partir de uma perspectiva conceitual. Metodologia / abordagem: Este estudo é de natureza qualitativa, descritiva e exploratória, com abordagem teórica, baseada nos principais teóricos. Originalidade / Relevância: Este estudo pressupõe o fortalecimento da literatura de modelo de negócio na perspectiva da competitividade dinâmica. Ele define modelo de negócio dinâmico e o diferencia de um modelo estático. Isso permite avaliar os fatores que fazem com que um modelo de negócio se torne estático e, portanto, não esteja preparado para uma lógica de negócios que crie valor e gere vantagem competitiva. Principais resultados: No final do ensaio, foi possível entender, a partir de uma perspectiva teórica, que o Modelo de Negócio Dinâmico contribui para a criação de valor e a geração de vantagem sustentável em ambientes de alta mudança. Contribuições teórico-metodológicas: Este estudo identificou três pressupostos conceituais que constituem o modelo de negócio dinâmico. Primeiro, o desenho dos modelos de negócios - interdependência e conexão entre seus elementos constitutivos. Em segundo lugar, os modelos de negócios ligados a capacidades dinâmicas. E por fim, a busca pela captura de valor e geração de vantagens competitivas sustentáveis pelas empresas. A partir dessas conclusões, foi possível avaliar o modelo de negócio Canvas na perspectiva de um modelo dinâmico.Palavras-chave: Modelos de negócio; Vantagem Competitiva; Canvas; Abordagem Dinâmic

Finding Kinematic Structure in Time Series Volume Data

This paper presents a new scheme for acquiring 3D kinematic structure and motion from time series volume data. Our basic strategy is to first represent the shape structure of the target in each frame by Reeb graph which we compute by using geodesic distance of target's surface, and then estimate the kinematic structure of the target which is consistent with these shape structures. Although the shape structures can be very different from frame to frame, we propose to derive a unique kinematic structure by way of clustering some nodes of graph, based on the fact that they are partly coherent to a certain extent of time series. Once we acquire a unique kinematic structure, we fit it to other Reeb graphs in the remaining frames, and describe the motion throughout the entire time series. The only assumption we make is that human body can be approximated by an articulated body with certain numbers of end-points and branches. We demonstrate the efficacy of the proposed scheme through some experiments

Eco-efficiency Performance Comparison of Additive and Subtractive Manufactured Parts

This thesis aims to develop a decision support tool for the manufacturing industry, which has been achieved through the 'techno-eco-efficiency' framework. The framework provides a comprehensive assessment of additive and subtractive manufactured parts by integrating technical feasibility assessment, environmental life cycle assessment, life cycle costing, and eco-efficiency assessment. The framework has been implemented on virgin polymer composite and metal parts. Additionally, the social impacts and the eco-efficiency improvement strategy of material recycling has been explored