Morphing Research Papers - Academia.edu (original) (raw)

There is an increasing interest in image-to-image translation withapplications ranging from generating maps from satellite images tocreating entire clothes’ images from only contours. In the presentwork, we investigate image-to-image... more

There is an increasing interest in image-to-image translation withapplications ranging from generating maps from satellite images tocreating entire clothes’ images from only contours. In the presentwork, we investigate image-to-image translation using GenerativeAdversarial Networks (GANs) for generating new data, taking as acase study the morphing of giraffes images into bird images. Morphinga giraffe into a bird is a challenging task, as they have differentscales, textures, and morphology. An unsupervised cross-domaintranslator entitled InstaGAN was trained on giraffes and birds,along with their respective masks, to learn translation betweenboth domains. A dataset of synthetic bird images was generatedusing translation from originally giraffe images while preservingthe original spatial arrangement and background. It is important tostress that the generated birds do not exist, being only the result of alatent representation learned by InstaGAN. Two subsets of commonliterature datase...

The paper presents some engineering solutions for the development of innovative aerodynamic surfaces with the capability of progressive shape variation. A brief introduction of the most significant issues related to the design of such... more

The paper presents some engineering solutions for the development of innovative aerodynamic surfaces with the capability of progressive shape variation. A brief introduction of the most significant issues related to the design of such morphing structures is provided. Thereafter, two types of structural solutions are presented for the design of internal compliant structures and flexible external skins. The proposed solutions exploit the properties and the manufacturing techniques of long fibre reinforced plastic in order to fulfil the severe and contradictory requirements related to the trade-off between morphing performance and load carrying capabilities.

Current understanding of the nature of type assumes it to be static, with properties of form and colour. With the introduction of temporal media, typographic artefacts may additionally have properties of behaviour. Temporal media allow... more

Current understanding of the nature of type assumes it to be static, with properties of form and colour. With the introduction of temporal media, typographic artefacts may additionally have properties of behaviour. Temporal media allow type to perform and evolve. ‘Fluid’ (Kac, 1997) type, as it appears in onscreen, is ‘dramatized’ (Helfand, 1997). A single form may present multiple letters through processes of morphing, rotation or deconstruction, and multiple forms may present a single letter through processes of reorganisation. Analysis of such artefacts not only requires us to re-evaluate our understanding of the nature of type, but also to reassess the notion that a single letterform may only have a single identity. Referencing examples of typographic performance, this paper will discuss the nature of fluid type, and propose that current typographic theory may need to adapt in order to respond to the introduction of temporal media.

Introduction: Saturn's frigid moon Titan, visited by the Huygens probe in 2005, has a thick atmosphere and three vast northern polar seas of methane and ethane : these seas are of particular interest for future exploration. These seas... more

Introduction: Saturn's frigid moon Titan, visited by the Huygens probe in 2005, has a thick atmosphere and three vast northern polar seas of methane and ethane : these seas are of particular interest for future exploration. These seas have a composition and conditions (1.5 bar, 92K) rather similar to those of Liquefied Natural Gas (LNG) on Earth. The largest, Kraken Mare, is 1000km in extent but of unknown depth: its complex shoreline morphology and evaporite deposits mapped by Cassini hint at a rich chemistry and climate history. We have developed a practical design for a robot submersible to explore this exotic environment, drawing on experience in terrestrial AUVs/UUVs as well as spacecraft systems. The proposed ~1-tonne vehicle, with a radioisotope Stirling generator power source, would be delivered to splashdown circa 2040, to make a ~90-day, ~2000km voyage of exploration around the perimeter, and across the central depths of, Kraken (Fig.1).

The use of patient-specific biomechanical models offers many opportunities in the treatment of adolescent idiopathic scoliosis, such as the design of personalized braces. The first step in the development of these patient-specific models... more

The use of patient-specific biomechanical models offers many opportunities in the treatment of adolescent idiopathic scoliosis, such as the design of personalized braces. The first step in the development of these patient-specific models is to fit the geometry of the torso skeleton to the patient’s anatomy. However, existing methods rely on high-quality imaging data. The exposure to radiation of these methods limits their applicability for regular monitoring of patients. We present a method to fit personalized models of the torso skeleton that takes as input biplanar low-dose radiographs. The method morphs a template to fit annotated points on visible portions of the spine, and it relies on a default biomechanical model of the torso for regularization and robust fitting of hardly visible parts of the torso skeleton, such as the rib cage. The proposed method provides an accurate and robust solution to obtain personalized models of the torso skeleton, which can be adopted as part of r...

Design of shape-changing or shape-morphing machines is an area of growing importance. Shape-change can potentially be applied soon to vary the cross section of a wing, create wind or liquid flow control by morphing shapes to locally... more

Design of shape-changing or shape-morphing machines is an area of growing importance. Shape-change can potentially be applied soon to vary the cross section of a wing, create wind or liquid flow control by morphing shapes to locally influence downstream fluid behavior, or vary the size of a car seat to meet a wider array of human anthropometric needs. Rigid body shape-change mechanisms offer many advantages including the high capacity to endure substantial loads while achieving large displacements. Their design techniques are also well-established. The goal of this research project is to develop the synthesis theory to address planar rigid-body shape-change where significant differences in arc length define the problem. A MATLAB-based software was developed to facilitate visual assessment of the process and results. Lastly, this paper illustrates several mechanization examples that apply the segmentation process, and the fundamental mechanism synthesis to guide the motion of the cha...

Liquid crystal surfaces can undergo topographical morphing in response to external cues. These shape-shifting coatings promise a revolution in various applications, from haptic feedback in soft robotics or displays to self-cleaning solar... more

Liquid crystal surfaces can undergo topographical morphing in response to external cues. These shape-shifting coatings promise a revolution in various applications, from haptic feedback in soft robotics or displays to self-cleaning solar panels. The changes in surface topography can be controlled by tailoring the molecular architecture and mechanics of the liquid crystal network. However, the nanoscopic mechanisms that drive morphological transitions remain unclear. Here, we introduce a frequency-resolved nanostrain imaging method to elucidate the emergent dynamics underlying field-induced shape-shifting. We show how surface morphing occurs in three distinct stages: (i) the molecular dipoles oscillate with the alternating field (10–100 ms), (ii) this leads to collective plasticization of the glassy network (~1 s), (iii) culminating in actuation of the topography (10–100 s). The first stage appears universal and governed by dielectric coupling. By contrast, yielding and deformation r...

Soft matter elements undergoing programed, reversible shape change can contribute to fundamental advance in areas such as optics, medicine, microfluidics, and robotics. Crosslinked liquid crystalline polymers have demonstrated huge... more

Soft matter elements undergoing programed, reversible shape change can contribute to fundamental advance in areas such as optics, medicine, microfluidics, and robotics. Crosslinked liquid crystalline polymers have demonstrated huge potential to implement soft responsive elements; however, the complexity and size of the actuators are limited by the current dominant thin‐film geometry processing toolbox. Using 3D printing, stimuli‐responsive liquid crystalline elastomeric structures are created here. The printing process prescribes a reversible shape‐morphing behavior, offering a new paradigm for active polymer system preparation. The additive character of this technology also leads to unprecedented geometries, complex functions, and sizes beyond those of typical thin‐films. The fundamental concepts and devices presented therefore overcome the current limitations of actuation energy available from thin‐films, thereby narrowing the gap between materials and practical applications.

In the last decades, 3D printing has played a crucial role as an innovative technology for tissue and organ fabrication, patient-specific orthoses, drug delivery, and surgical planning. However, biomedical materials used for 3D printing... more

In the last decades, 3D printing has played a crucial role as an innovative technology for tissue and organ fabrication, patient-specific orthoses, drug delivery, and surgical planning. However, biomedical materials used for 3D printing are usually static and unable to dynamically respond or transform within the internal environment of the body. These materials are fabricated ex situ, which involves first printing on a planar substrate and then deploying it to the target surface, thus resulting in a possible mismatch between the printed part and the target surfaces. The emergence of 4D printing addresses some of these drawbacks, opening an attractive path for the biomedical sector. By preprogramming smart materials, 4D printing is able to manufacture structures that dynamically respond to external stimuli. Despite these potentials, 4D printed dynamic materials are still in their infancy of development. The rise of artificial intelligence (AI) could push these technologies forward en...

This paper describes a melody morphing method that generates an intermediate melody between a melody and another melody with a systematic order according to a certain numerical measure. Conventional music sequence software only operates... more

This paper describes a melody morphing method that generates an intermediate melody between a melody and another melody with a systematic order according to a certain numerical measure. Conventional music sequence software only operates on the surface structure ...

A wind tunnel tests campaign has been conducted to investigate the aerodynamic flow around a wing morphing to be used in a micro air vehicle. Non-intrusive whole field measurements were obtained by using PIV, in order to compare the... more

A wind tunnel tests campaign has been conducted to investigate the aerodynamic flow around a wing morphing to be used in a micro air vehicle. Non-intrusive whole field measurements were obtained by using PIV, in order to compare the velocity and turbulence intensity maps for the modified and the original version of an adaptive wing designed to be used in a micro air vehicle. Four sections and six angles of attack have been tested. Due to the low aspect ratio of the wing and the low Reynold number tested of 6.4 × 104, the influence of the 3D effects has been proved to be important. At high angles of attack, the modified model prevented the detachment of the stream, increased the lift of the wing and reduced the turbulence intensity level on the upper surface of the airfoil and in the wake.

Деформація зображення є актуальною задачею у багатьох сферах діяльності, якість рішення якої залежить від правильності вибору методів та засобів. З переходом комп’ютерної графіки від двовимірних графічних моделей до тривимірних,... more

Деформація зображення є актуальною задачею у багатьох сферах діяльності, якість рішення якої залежить від правильності вибору методів та засобів. З переходом комп’ютерної графіки від двовимірних графічних моделей до тривимірних, з’являється необхідність накладання існуючих растрових зображень на тривимірні об’єкти, або поверхні. Мета роботи – проаналізувати методи деформації зображення та існуючі засоби, порівняти методи морфінгу двох зображень та розробити програмний продукт для генерації послідовності деформованих зображень та анімації морфінгу, що накладається на задану поверхню.Deformation of the image is a widespread problem in many areas, the quality of solving which depends on the correct choice of methods and tools. Since computer graphics used to creation the three-dimensional models, there is a need to overlay existing bitmap on them. The purpose of this work is to analyze the methods and existing tools of deformation of bitmaps, compare the methods of the morphing and dev...

This review presents an integrated theoretical and computational characterization and analysis of surface pattern formation in chiral and achiral liquid crystal self-assembly and the mechanical/optical/tribological/tissue engineering... more

This review presents an integrated theoretical and computational characterization and analysis of surface pattern formation in chiral and achiral liquid crystal self-assembly and the mechanical/optical/tribological/tissue engineering surface functionalities that emerge from various wrinkling processes. Strategies to target surface patterns include linear, non-linear, multidirectional and multiscale wrinkling phenomena. The focus of the review is to show the unique surface structure-functionalities that emerge from anisotropic liquid crystal soft matter, eliminating or reducing the need of aggressive solvents, extreme pressure/temperature conditions, erosion and other surface morphing approaches. The surface pattern formation theoretical-modelling- computational results are then connected and validated with actual biological surfaces that are considered solid liquid crystal analogues, such as exocuticles of insects, fish scales, and flowers. A unique feature of the in silico surface ...

In this work, we propose a deep learning based method, namely, variational, convolutional recurrent autoencoders (VCRAE), for musical instrument synthesis. This method utilizes the higher level time-frequency representations extracted by... more

In this work, we propose a deep learning based method, namely, variational, convolutional recurrent autoencoders (VCRAE), for musical instrument synthesis. This method utilizes the higher level time-frequency representations extracted by the convolutional and recurrent layers to learn a Gaussian distribution in the training stage, which will be later used to infer unique samples through interpolation of multiple instruments in the usage stage. The reconstruction performance of VCRAE is evaluated by proxy through an instrument classifier, and provides significantly better accuracy than two other baseline autoencoder methods. The synthesized samples for the combinations of 15 different instruments are available on the companion website.

In this work, we propose a deep learning based method, namely, variational, convolutional recurrent autoencoders (VCRAE), for musical instrument synthesis. This method utilizes the higher level time-frequency representations extracted by... more

In this work, we propose a deep learning based method, namely, variational, convolutional recurrent autoencoders (VCRAE), for musical instrument synthesis. This method utilizes the higher level time-frequency representations extracted by the convolutional and recurrent layers to learn a Gaussian distribution in the training stage, which will be later used to infer unique samples through interpolation of multiple instruments in the usage stage. The reconstruction performance of VCRAE is evaluated by proxy through an instrument classifier, and provides significantly better accuracy than two other baseline autoencoder methods. The synthesized samples for the combinations of 15 different instruments are available on the companion website.

The increase in revenue within a destination reflects the quality of service delivery, especially in the hotel brand sector. This research explores the application of bilinear time series models to estimate the monthly revenue data of TH... more

The increase in revenue within a destination reflects the quality of service delivery, especially in the hotel brand sector. This research explores the application of bilinear time series models to estimate the monthly revenue data of TH hotel brand Abuja. The study utilizes quantitative secondary data, analysing revenue figures from 2017 to 2022. The aim was to identify and estimate a suitable bilinear time series model for the revenue data of the TH hotel brand up to 2030. Both descriptive and inferential statistics were employed to test the hypothesis. The Akaike Information Criterion (AIC) was used to determine the best-fitting model, revealing that the bilinear time series model (6, 0, 6, 0) is most suitable for modelling the revenue series. Additionally, the Shapiro-Wilk test for normality was conducted, showing that the null hypothesis (H0) at an alpha level of 0.05 is rejected when the p-value is less than 0.05 (p < 0.05). This indicates that the data tested do not come from a normally distributed population, highlighting the necessity of this research. The results demonstrate that Bilinear Fit Six

3D free-form surfaces with high aesthetical and functional requirements are widely used in automotive and aerospace industry. Geometric and dimensional variations of these free-form surfaces caused by inevitable uncertainties in the... more

3D free-form surfaces with high aesthetical and functional requirements are widely used in automotive and aerospace industry. Geometric and dimensional variations of these free-form surfaces caused by inevitable uncertainties in the manufacturing process often leads to product quality issues. Failing to model the effect of non-ideal parts, i.e., parts with geometric and dimensional errors, during design inhibits the ability to predict such quality issues. A major challenge for accurate modelling of non-ideal parts during early design phase is the limited availability of data and the ability to effectively utilise the historical data from similar parts. Overcoming this challenge a novel morphing Gaussian Random Field (mGRF) methodology for shape error modelling of 3D free-form surfaces during the early design stage is presented in this paper. The mGRF methodology works under the constraint of limited data availability and can utilise historical measurement data of similar parts to ge...