Philip Azariadis

University of West Attica | TEIATH · Department of Industrial Design and Production Engineering

The human gait cycle is extensively studied. Huge effort for its reproduction is made, especially for identifying and compensating abnormal gait phases on humans with motorial problems. This paper reviews the main characteristics of an implemented biomimetic test rig, emphasizes on combinatorial experimental capabilities due to the rig's design and...

Computing the shortest path between two points or a set of points on a point cloud representing a manifold is a crucial problem in Computational Science, particularly in Computer Graphics and CAD/CAM. Most methods calculate geodesic paths on a polygonal model of the manifold, while only a few compute them directly on the point cloud. When the point...

In this article a set of strategic interventions developed through the Erasmus + KA2 project entitled ‘Design and Innovation Capacity Building in India/DESINNO’ which is under implementation within the action ‘Capacity Building in the field of Higher Education’ are presented. The approach developed brings together an historical overview of design i...

Design disciplines have constantly evolved to keep up with the emerging demands of the 21 st Century. Design education is thus called to change its methods, tools and approaches. There is an increasing interest in emerging economies in design education, especially in India, where the role of creativity, communication and technology can support soci...

A point cloud smoothing algorithm is presented which is based on the mesh filtering procedure of Taubin. This is accomplished by defining a robust one-ring neighborhood for each vertex of the point cloud based on the elliptic Gabriel graph and by incorporating non-uniform Gaussian weights during the smoothing process. The proposed method is robust...

The creation of a flexible and robust 3D model that appropriately conveys its design intent is a hard task that mainly relies on the designer’s ability to express, through constraints and parameters, the expected behavior of the model. On this basis, we propose an Integrated Design Intent Architecture that aims to communicate the design intent and...

This paper studies the effect of diabetes on the mechanical behavior of a 3D foot bio-model during gait. High forces carried out by the foot lead to the development of significant plantar pressures, which may cause serious problems such as ulcers or calluses in areas where there is a high stress concentration when the foot interacts with the ground...

Scientific gait analysis methods aim to offer objective measurements, to assist physicians towards an accurate diagnosis or pre-diagnosis of ailments before they actually manifest through noticeable symptoms. This paper reviews selected gait analysis system technologies, trends, applications and discusses errors and precision in spatial and angular...

Industrial manipulators should be able to execute difficult tasks in the minimum cycle time in order to increase performance in a robotic work cell. This paper is focused on determining the near optimum route of a manipulator’s end-effector which is requested to reach a predefined set of demand points in a robotic work cell. Two subproblems are rel...

The traditional manufacturing sectors (footwear, textiles and clothing, furniture and toys, among others) are based on small and medium enterprises with limited capacity on investing in modern production technologies. Although these sectors rely heavily on product customization and short manufacturing cycles, they are still not able to take full ad...

The creation of a flexible and robust 3D model that appropriately conveys its design intent is a hard task that mainly relies on the designer’s ability to express, through constraints and parameters, the expected behavior of the model. On this basis, we propose an Integrated Design Intent Architecture that aims to communicate the design intent and...

The purpose of this paper is to present a mission design approach for a service mobile manipulator which is moving and manipulating objects in partly known indoor environments. The mobile manipulator is requested to pick up and place objects on predefined places (stations). The proposed approach is based on the Bump-Surface concept to represent rob...

In many countries around us, traditional sectors (footwear, textiles and clothing, furniture and toys, among others) are supported by small and medium-sized enterprises (SMEs) with limited capacity to invest in modern production technologies. Although these sectors rely heavily on product customization and short manufacturing cycles, they are not y...

This paper describes an approach for designing an energy efficient motion and task scheduling for an autonomous vehicle which is moving in complicated environments in industrial sector or in large warehouses. The vehicle is requested to serve a number of workstations while moving safely and efficiently in the environment. In the proposed approach,...

The optimization of the task placement as well as the anatomy of a metamorphic manipulator in the presence of obstacles is presented. The rigid links of the metamorphic manipulator and the obstacles are represented using point clouds. An optimization problem is formulated, where the minimum manipulability index is maximized deriving a collision-fre...

Footwear prototyping is constrained by significant volume of "sampling", time to market pressures, cost implications and the failure of the industry to attract and develop high quality professionals mastering modern computer-aided product development. Computer-Aided Engineering (CAE) and material selection are becoming increasingly important transf...

This paper presents current research results concerning the parametric study of the effect of osteoporosis on the mechanical behavior of foot using various bone and sole materials and three-dimensional finite element foot-sole models. Two quantities are investigated: plantar pressures and bone stresses. A detailed foot bio-model is constructed usin...

This paper introduces two methodologies for the reconstruction of skeletal mesh models and for the generation of parametric bone models of the human foot. First, a new Parametric-Based Deformation methodology is presented, which deforms a template 3D mesh according to user-defined semantic parameters in order to derive a new bone model. The propose...

Footwear is subject to bending and torsion deformations that affect comfort perception. Following review of Finite Element Analysis studies of sole rigidity and comfort, a three-dimensional, linear multi-material finite element sole model for quasi-static bending and torsion simulation, overcoming boundary and optimisation limitations, is described...

This paper presents a research on the calculation of short- to mid-range ship routes that are based on density maps derived by previous historical locations of liner or merchant ships. Two main approaches are presented. In the first one, the route finding problem is formulated as an evolutionary-optimization problem. In the second one, a modified A...

These days manufacturing and design teams continuously collaborate with colleagues across traditional office boundaries and manufacturing floors in an effort to meet with growing demand and competition at a global scale. An essential tool for this industry is computer-aided design and engineering (CAD/CAE) software, which, unfortunately, was never...

This paper focuses on the collision-free motion of a team of robots moving in a 2D environment with formation and non-holonomic constraints. With the proposed approach one can simultaneously control the formation of the team and generate a safe path for each individual robot. The computed paths satisfy the non-holonomic constraints, avoid collision...

The purpose of this paper is to present a mission design approach for a service mobile manipulator which is moving and manipulating objects in partly known indoor environments. The mobile manipulator is requested to pick up and place objects on predefined places (stations). The proposed approach is based on the Bump-Surface concept to represent rob...

In this paper, we present a novel approach to estimate the maximum pressure over the foot plantar surface exerted by a two-layer shoe sole for three distinct phases of the gait cycle. The proposed method is based on Artificial Neural Networks and can be utilized for the determination of the comfort that is related to the sole construction. Input pa...

Footwear is one of the most widely and intensively used human centric products. Evaluating and optimizing footwear performance is of outmost importance for human comfort. This paper presents a definition of foot plantar mechanical comfort along with a detailed approach for evaluating it through finite element analysis. An extensive review of biomec...

In this work a new reconstruction technique is presented based on Parametric-Based Deformation. The new method uses a template 3D mesh model which is deformed according to user-defined semantic parameters in order to derive a new 3D object. The proposed methodology is divided in three stages: template construction (production of a template mesh mod...

This work evaluates the mechanical behaviour of a foot bio-model using three-dimensional finite element analysis. Initially, CT scans and reverse engineering approaches are used to reconstruct detailed foot models in order to be able to achieve quality meshing and realistic results in the FE analysis. Following, two FE models are developed in order...

This paper considers the combinatorial problem of motion planning and schedul-ing with stochastic demands. Here, an autonomous vehicle with limited capacity is requested to serve workstations in an industrial environment. Its workstation has a varying demand which is revealed upon the arrival of the corresponding vehicle. This combined problem is s...

This paper presents current research results concerning the parametric study of the effect of sole's materials on plantar pressure distribution using three-dimensional finite element foot-footwear models. Initially, a detailed foot bio-model is constructed using dense CT scans. Following, a detailed sole model consisted of two layers is parametrica...

The purpose of this chapter is to present an integrated approach for Mission Design of a team of Service Robots which is operating in partially known indoor environments such as libraries, hospitals or warehouses. The robots are requested to serve a number of service stations while taking into account movement safety and other kinematical constrain...

This paper presents current research results that concern the generation of foot bio-models for performing finite element analysis for footwear design evaluation and optimization. The foot bio-models produced so far include complete geometric models of the foot bones along with their corresponding material properties. For the generation of the bone...

The method presented in this paper is part of a 3-step reconstruction methodology for the extraction of a polyhedron from a single view natural sketch. In particular, the current paper focuses on the 2D geometric definition of the hidden part in a topologically reconstructed line drawing (intermediate wireframe sketch) as this is generated from the...

Comfort is a fairly complex subjective phenomenon consisting of physiological, psychological and physical aspects. Foot mechanical comfort is defined and two major groups are distinguished: dorsal and plantar. Plantar mechanical comfort is concerned with the interaction of the foot with the footwear sole and the ground. The most important mechanica...

Comfort is a fairly complex subjective phenomenon consisting of physiological, psychological and physical aspects. Foot mechanical comfort is defined and two major groups are distinguished: dorsal and plantar. Plantar mechanical comfort is concerned with the interaction of the foot with the footwear sole and the ground. The most important mechanica...

The purpose of this chapter is to present a mission planning approach for a service robot, which is moving and manipulating objects in semi-structured and partly known indoor environments such as stores, hospitals, and libraries. The recent advances and trends in motion planning and scheduling of mobile robots carrying manipulators are presented. T...

This paper presents a new solution approach for managing (coordinating) the motion of a fleet of autonomous vehicles (AVs) in indoors factory environments. A fleet of AVs is requested to serve all the work stations while taking into account the safely movement in the shop-floor as well as time duration and AVs’ kinodynamic constraints. The objectiv...

This paper presents a global solution to a general problem of planning an optimum path of a robot moving in two dimensional environments. The proposed method is able to deal with both holonomic and non-holonomic robots moving into dynamic 2D environments with static and/or moving obstacles. The proposed method is based on the Bump-Surfaces concept...

Sketching continues to be a vital part of methods and technologies related to Concept Development, including those analyzed in this paper: “concept design with constraints”, “solid from sketch”, “sketching on a point cloud” and “geometric modeling of design constraints”. Existing methods are analyzed and critical subproblems are identified. New sol...

This paper introduces an optimization strategy for evaluating the realizability of a 2D wireframe sketch that conveys geometric and topological information about a 3D solid model. Applying the cross-section realizability criterion, one is able to assert whether a wireframe sketch is a true orthogonal projection of a 3D-solid. In this work, we first...

D mesh segmentation is a fundamental process for Digital Shape Reconstruction in a variety of applications including Reverse Engineering, Medical Imaging, etc. It is used to provide a high level representation of the raw 3D data which is required for CAD, CAM and CAE. In this paper, we present an exhaustive overview of 3D mesh segmentation methodol...

During the last decade, a significant amount of works has been published for the study of footwear biomechanics and its relation with the human-foot kinematics or gait cycle. Modern approaches use Computer-Aided Engineering (CAE) with detailed 3D foot models in order to derive results that allow the evaluation and optimization of the shoe design. W...

The purpose of this chapter is to present a mission planning approach for a service robot, which is moving and manipulating objects in semi-structured and partly known indoor environments such as stores, hospitals, and libraries. The recent advances and trends in motion planning and scheduling of mobile robots carrying manipulators are presented. T...

This paper considers the motion design problem for a service robot which is moving and manipulating objects in a partly known indoor environment such as stores and libraries. A service robot is requested to serve a set of work-stations in the environment providing transport and delivery tasks. The objective is to determine the optimum sequence of t...

This paper considers the mission design problem for a service robot which is operating in a partly known indoor environment. A service robot is requested to serve a set of work stations in the environment providing transport and delivery tasks while avoiding collisions with the obstacles during its travel. The objective is to determine the optimum...

This paper presents a novel approach to reconstructing traditional filigree jewelry. Our method aims at producing an editable CAD representation that can accurately capture the original design and be capable of re-parameterization and modification prior to manufacturing (for example to insert custom designs and abide to free-form artistic alteratio...

In this paper, a generic approach for the integration of vehicle routing and scheduling and motion planning for a group of autonomous guided vehicles (AGVs) is proposed. The AGVs are requested to serve all the work stations in a two-dimensional environment while taking into account kinematics constraints and the environment’s geometry during their...

Humans have the ability to easily recognize 3D shape from a given sketch. On the contrary, a computer program requires mathematical criteria to establish if a sketch is realizable, i.e., if it is the projection of a 3D model. This paper presents an algorithmic method that is based on Whiteley’s cross-section criterion, in order to evaluate the real...

In this paper, a retrieval methodology for 3D articulated objects is presented that relies upon a graph-based object representation. The methodology is composed of a mesh segmentation stage which creates the Attributed Relation Graph (ARG) of the object along with a graph matching algorithm which matches two ARGs. The graph matching algorithm is ba...

Textile, clothing, leather and footwear manufacturers strive to meet higher performance expectations, decreasing delivery times and stricter Environmental, Health and Safety (EHS) requirements within a global operating environment. Although these industrial sectors are part of the same supply chain and face similar challenges, no business framework...

Purpose The purpose of this paper is to derive a new method for developing sizing systems for the mass customization of garments. Design/methodology/approach A range of recently published works has been studied. A new method is derived by following a basic statistical analysis on anthropometric data which are supported by an iterative mass customi...

This paper presents a new virtual-engineering platform, called as virtual shoe test bed (VSTB), for supporting the design of footwear from the engineering point of view. The proposed VSTB system includes various functional design criteria in order to support the definition of the best solution for each product utilising scenarios based on user need...

Most of the approaches which address the problem of 3D object retrieval, use global descriptors of the objects which fail to consistently compensate for the intra-class variability of articulated objects. In this paper, a retrieval methodology is presented which is based upon a graph-based object representation. This is composed of a meaningful new...

This paper presents a method for parameterizing three-dimensional (3D) point-clouds using a recursive subdivision approach. The proposed solution adapts ideas from emerging point-based geometric modelling and extends the dynamic base surfaces (DBS) concept in order to improve the accuracy of the produced parameterizations. Using the new approach it...

Interior space design is a collaborative process for deriving different proposals on the content and structure of any type of interior space. This process is partially supported by mainstream CAD systems which are not designed for that particular task but for general engineering-or architectural-design development. Although, several add-on modules...

In this paper, a new method is introduced for finding a near-optimal path of a nonholonomic robot moving in a 2D environment cluttered with static obstacles. The method is based on the Bump-Surfaces concept and is able to deal with robots represented by a translating and rotating rigid body. The proposed approach is applied to car-like robots.

3D mesh segmentation is a fundamental process for Digital Shape Reconstruction in a variety of applications including Reverse Engineering, Medical Imaging, etc. It is used to provide a high level representation of the raw 3D data which is required for CAD, CAM and CAE. In this paper, we present an exhaustive overview of 3D mesh segmentation methodo...

Export Date: 20 January 2009, Source: Scopus, Language of Original Document: English, Correspondence Address: Azariadis, P.; ELKEDE; Technology and Design Centreemail: azar@aegean.gr, References: Alcántara, E.; González, J. C.; Alemany, S.; García, A.C.: Development of a new method to measure the recovery ability of insole materials by simulating p...

Export Date: 20 January 2009, Source: Scopus, CODEN: CMPTA, doi: 10.1007/s00607-006-0190-2, Language of Original Document: English, Correspondence Address: Xidias, E.K. Patras; email: xidias@mech.upatras.gr, References: Latombe, J.C., (1991) Robot motion planning, , Boston: Kluwer Academic Publishers;

In this paper, a new method is introduced for computing energy-minimizing motions in two-dimensional environments cluttered with a priori known static and moving obstacles. The proposed method is based on a new four-dimensional motion-planning space represented by a Bump-Surface embedded in ℛ. The energy-minimizing motion-design problem is expresse...

Modelling a three-dimensional (3D) point cloud with smooth mathematical surfaces or high-quality triangle meshes is an essential component of many applications in Computer Graphics, Visualization and Computer-Aided Design/Engineering. A vital prerequisite for that is the construction of a parameterization for a given 3D point-set; this problem is t...

The present paper addresses two important problems related to "product-design with point-based CAD". A new interactive reverse-engineering technique is proposed for continuous surfaces which is partially based on a new technique for digital-curve design. Both methods have already been implemented in an industrial CAD system; application examples fr...

This paper introduces a new method for global, near optimal, motion-planning of a robot (either mobile or redundant manipulator) moving in an environment cluttered with a priori known prohibited areas which have arbitrary shape, size and location. The proposed method is based on the novel notion of Bump-surfaces (or B-surfaces) which represent the...

Point-based geometric models are gaining popularity in both the computer graphics and CAD fields. A related design/modelling problem is the focus of the reported research: drawing curves onto digital surfaces represented by clouds of points. The problem is analyzed and solved, and a set of ‘design tools’ are proposed which allow the user/designer t...

IntroductionCriteria of Developability for SurfacesEvaluating Planar DevelopmentsMethods for Approximate Planar Development of Curved SurfacesApplication and Evaluation of Current Methods SummaryReferences

In this paper a new method for parameterizing clouds of unorganized points is presented. The proposed method introduces the notion of dynamic base surfaces (DBS) which are dynamically adapted to the three-dimensional shape implied by the clouds of points. The only assumption regarding the cloud of points is the existence of a boundary defined by a...

Surface flattening is a crucial problem for many applications as indicated by the steady flow of new methods appearing in related publications. Quality control of these methods, by means of accuracy criteria independent of particular flattening methodologies, has not been addressed yet by researchers. This is exactly the subject of this paper: a de...

In this paper, a new method based on constrained global optimization is proposed for generating planar developments of arbitrarily three-dimensional surfaces. With this method an initial planar development is derived which is refined in order to satisfy certain criteria. This refinement is formulated as a global minimization problem under constrain...

In this paper, two methods for generating a planar development of a three-dimensional (3D) surface are proposed. The first method is based on the solution of a global optimization problem without constraints taking into consideration the geodesic curvature of the surface isoparametric curves. The second method is based on the solution of a global o...

In this paper, a representational model is proposed for the description and transformation of three-dimensional geometric entities in computer graphics. The structure of the proposed representation is based on dual unit vectors, while the corresponding transformations are carried out through dual unit quaternions or dual orthogonal matrices. The ma...

This paper introduces a method for applying texture from a two-dimensional domain to a three-dimensional surface which is divided into two stages: the pre-processing stage, where a proper planar development of the three-dimensional surface is generated and the stage of mapping texture from the plane to the given surface. Several techniques for gene...

Cited By (since 1996): 32, Export Date: 20 January 2009, Source: Scopus, CODEN: CAIDA, Language of Original Document: English, Correspondence Address: Aspragathos, N.; Dept. of Mech. and Aero. Engineering; Laboratory of Machine Design; University of Patras 26110 Patras, Greece, References: Azariadis, P., Aspragathos, N., Tools for Designing and Eng...

This paper presents a novel approach to reconstructing traditional filigree jewelry. Our method aims at producing an editable CAD representation that can accurately capture the original design and be capable of re-parameterization and modification prior to manufacturing (for example to insert custom designs and abide to free-form artistic alteratio...