Out-of-plane modal property extraction based on multi-level image pyramid reconstruction using stereophotogrammetry

2022 ◽  
Vol 169 ◽  
pp. 108786
Author(s):  
Jau-Yu Chou ◽  
Chia-Ming Chang ◽  
Billie F. Spencer Jr
Keyword(s):  
Image Pyramid ◽  
Out Of Plane ◽  
Modal Property ◽  
Multi Level

Characteristics of 12 μm Thick Polysilicon for an Optically-Sensed Accelerometer

1999 ◽  
Author(s):  
Y. H. Chen ◽  
T. D. Kudrle ◽  
N. C. Tien
Keyword(s):  
Surface Roughness ◽  
New Technology ◽  
Stress Gradient ◽  
Surface Micromachining ◽  
Polysilicon Film ◽  
Out Of Plane ◽  
Polysilicon Films ◽  
Polysilicon Layer ◽  
Multi Level ◽  
Large Capacitance

Abstract A low-stress thick polysilicon surface micromachining process has been successfully developed. An accelerometer composed of a 12μm thick polysilicon layer and an integrated photo diode on the substrate was fabricated and tested demonstrating the functionality of the process. The polysilicon film has an estimated stress of 0.6 MPa (tensile). This new technology combines some of the advantages of high-aspect-ratio bulk-micromachining such as large capacitance and high out-of-plane stiffness, with the proven advantages typically found for surface micromachining such as the formation of multi-level elements. In this paper, we first present the optimized process flow, which provides the low-stress thick polysilicon film. Then, the important characteristics of thick polysilicon films such as internal stress, stress gradient and surface roughness are discussed. Testing of the integrated photodiode was performed. Finally, the initial testing results for the accelerometer are presented to demonstrate the success of this newly developed technology.

scholarly journals Nested Buildings: An Innovative Strategy for the Integrated Seismic and Energy Retrofit of Existing Masonry Buildings with CLT Panels

2021 ◽  
Vol 13 (3) ◽  
pp. 1188
Author(s):  
Maria Rosa Valluzzi ◽  
Elisa Saler ◽  
Alberto Vignato ◽  
Matteo Salvalaggio ◽  
Giorgio Croatto ◽  
...  
Keyword(s):  
High Performance ◽  
Coupled System ◽  
Innovative Strategy ◽  
Energy Retrofit ◽  
System A ◽  
Hygrothermal Performance ◽  
Out Of Plane ◽  
Multi Level ◽  
Innovative Techniques ◽  
Existing Structure

The Italian building heritage is aged and inadequate to the high-performance levels required nowadays in terms of energy efficiency and seismic response. Innovative techniques are generating a strong interest, especially in terms of multi-level approaches and solution optimizations. Among these, Nested Buildings, an integrated intervention approach which preserves the external existing structure and provides a new structural system inside, aim at improving both energy and structural performances. The research presented hereinafter focuses on the strengthening of unreinforced masonry (URM) buildings with cross-laminated timber (CLT) panels, thanks to their lightweight, high stiffness, and good hygrothermal characteristics. The improvement of the hygrothermal performance was investigated through a 2D-model analyzed in the dynamic regime, which showed a general decreasing in the overall thermal transmittance for the retrofitted configurations. Then, to evaluate the seismic behavior of the coupled system, a parametric linear static analysis was implemented for both in-plane and out-of-plane directions, considering various masonry types and connector spacings. Results showed the efficiency of the intervention to improve the in-plane response of walls, thus validating possible applications to existing URM buildings, where local overturning mechanisms are prevented by either sufficient construction details or specific solutions.

scholarly journals A novel image inpainting framework based on multilevel image pyramids

2021 ◽  
Vol 41 (1) ◽  
Author(s):  
Md. Salman Bombaywala ◽  
Chirag Paunwala
Keyword(s):  
Search Strategy ◽  
Image Inpainting ◽  
Search Space ◽  
Human Vision ◽  
Image Pyramid ◽  
Target Region ◽  
Image Pyramids ◽  
Multi Level ◽  
Coherent Information ◽  
State Of Art

Image inpainting is the art of manipulating an image so that it is visually unrecognizable way. A considerable amount of research has been done in this area over the last few years. However, the state of art techniques does suffer from computational complexities and plausible results. This paper proposes a multi-level image pyramid-based image inpainting algorithm. The image inpainting algorithm starts with the coarsest level of the image pyramid and overpainting information is transferred to the subsequent levels until the bottom level gets inpainted. The search strategy used in the algorithm is based on hashing the coherent information in an image which makes the search fast and accurate. Also, the search space is constrained based on the propagated information thereby reducing the complexity of the algorithm. Compared to other inpainting methods; the proposed algorithm inpaints the target region with better plausibility and human vision conformation. Experimental results show that the proposed algorithm achieves better results as compared to other inpainting techniques.

scholarly journals Multi-level deep drawing simulations of AA3104 aluminium alloy using crystal plasticity finite element modelling and phenomenological yield function

2021 ◽  
Vol 13 (3) ◽  
pp. 168781402110012
Author(s):  
Fujia Sun ◽  
Ping Liu ◽  
Wencheng Liu
Keyword(s):  
Finite Element ◽  
Crystal Plasticity ◽  
Flow Rule ◽  
Stress Space ◽  
Crystal Plasticity Finite Element ◽  
Yield Functions ◽  
Out Of Plane ◽  
Multi Level ◽  
Continuum Scale ◽  
Associated Flow Rule

This paper proposed a hierarchical multi-level model to study the crystallographic texture induced mechanical anisotropy of AA3104-H19 aluminium sheet from mesoscale to continuum scale. In the mesoscale, full-field crystal plasticity finite element method (CPFEM) was used to provide both in-plane and out-of-plane yield stresses and plastic potential points in various deformation modes. In the continuum scale, these materials sampling points were used to determine the parameters of two phenomenological yield functions (Yld2000-2d in plane stress space and Yld2004-18p in 3D stress space) using associated flow rule (AFR) and non-associated flow rule (non-AFR). The results indicate that higher accuracy obtained by Yld2000-2d and Yld2004-18p yield functions associated with non-AFR in comparison with AFR. These phenomenological models were successfully implemented into finite element (FE) code using an explicit integration scheme to simulate sheet metal forming. It is found that the 3D Yld2004-18p model involved with both in-plane and out-of-plane anisotropies is superior to 2D Yld2000-2d model which only accounts for in-plane anisotropy.

Grain separation enhanced magnetic coercivity in Pt/Co multilayers.

1993 ◽  
Vol 51 ◽  
pp. 1038-1039 ◽  
Author(s):  
G.A. Bertero ◽  
R. Sinclair
Keyword(s):  
Remanent Magnetization ◽  
Strong Influence ◽  
Uniaxial Anisotropy ◽  
Magnetic Coupling ◽  
Recording Media ◽  
Magnetic Media ◽  
Signal To Noise ◽  
Out Of Plane ◽  
Longitudinal Recording ◽  
The Relationship

Pt/Co multilayers displaying perpendicular (out-of-plane) magnetic anisotropy and 100% perpendicular remanent magnetization are strong candidates as magnetic media for the next generation of magneto-optic recording devices. The magnetic coercivity, Hc, and uniaxial anisotropy energy, Ku, are two important materials parameters, among others, in the quest to achieving higher recording densities with acceptable signal to noise ratios (SNR). The relationship between Ku and Hc in these films is not a simple one since features such as grain boundaries, for example, can have a strong influence on Hc but affect Ku only in a secondary manner. In this regard grain boundary separation provides a way to minimize the grain-to-grain magnetic coupling which is known to result in larger coercivities and improved SNR as has been discussed extensively in the literature for conventional longitudinal recording media.We present here results from the deposition of two Pt/Co/Tb multilayers (A and B) which show significant differences in their coercive fields.

Verlaufsanalyse wöchentlicher Selbst- und Fremdeinschätzungen in der Langzeittherapie suchtkranker Jugendlicher

2019 ◽  
Vol 47 (2) ◽  
pp. 126-137
Author(s):  
Ferdinand Keller ◽  
Tatjana Stadnitski ◽  
Jakob Nützel ◽  
Renate Schepker
Keyword(s):  
Allen Vier ◽  
Multi Level

Zusammenfassung. Fragestellung: Über Veränderungen in der emotionalen Befindlichkeit von Jugendlichen während einer Suchttherapie ist wenig bekannt. Methode: Die Jugendlichen füllten wöchentlich einen entsprechenden Fragebogen aus, analog ihre Bezugsbetreuer eine parallelisierte Kurzfassung. Von 42 Jugendlichen liegen insgesamt 853 Bogen und von den Bezugsbetreuern 708 Bogen vor. Die Fragebogen wurden zunächst faktorenanalytisch hinsichtlich ihrer Dimensionalität ausgewertet, anschließend wurden gruppenbezogene Verlaufsanalysen (Multi-Level-Modelle) und Abhängigkeitsanalysen auf Einzelfallebene (Zeitreihenanalysen) durchgeführt. Ergebnisse: Im Jugendlichenfragebogen ergaben sich vier Faktoren: negative Befindlichkeit, Wertschätzung von Therapie/Betreuung, Motivation und Suchtdynamik. Die Übereinstimmung zwischen den Jugendlichen- und der (einfaktoriellen) Betreuereinschätzung fiel insgesamt niedrig bis mäßig aus, brachte aber auf Einzelfallebene differenziertere Ergebnisse. Im Verlauf nahmen die Werte auf allen vier Jugendlichenskalen ab. Einzig der Verlauf der Wertschätzung in der Eingewöhnungsphase war prädiktiv für den späteren Abbruch der Maßnahme: Bei den Abbrechern nahm die Wertschätzung ab, während sie bei den Beendern initial stieg. Schlussfolgerungen: Der bedeutsamste Faktor in Bezug auf die Therapiebeendigung suchtkranker Jugendlicher scheint die Wertschätzung von Therapie/Betreuung zu sein, während die Motivation jugendtypische Schwankungen aufweist. Der Suchtdynamik kam eine deutlich weniger bedeutende Rolle zu als allgemein angenommen. Programme in der Langzeittherapie sollten die Wertschätzung von Therapie/Betreuung künftig mehr fokussieren als die Suchtdynamik.

A Multi-level Measure Of Safety Climate And Associations With Safety Behaviors In The Fire Service

2017 ◽  
Author(s):  
Todd D. Smith ◽  
Mari-Amanda Dyal ◽  
Yongjia Pu ◽  
Stephanie Dickinson ◽  
David M. DeJoy
Keyword(s):  
Safety Climate ◽  
Fire Service ◽  
Safety Behaviors ◽  
Multi Level
Sign in / Sign up

Export Citation Format

Share Document