scholarly journals Flaw Detection on a Tilted Particleboard by Use of the Spec-Radiation Method

2020 ◽  
Vol 10 (23) ◽  
pp. 8513
Author(s):  
Andreas Sebastian Schmelt ◽  
Jens Twiefel
Keyword(s):  
Flaw Detection ◽  
Standing Waves ◽  
Single Plane ◽  
Radiation Method ◽  
Usual Procedure ◽  
Novel Approach ◽  
Need To Evaluate ◽  
Enhancement Method ◽  
Tilted Plane ◽  
Acoustical Holography

Herein, we present a novel approach to the spec-radiation method (a method of acoustical holography) for determining the sound distribution on a tilted particleboard by calculating a single plane and rotation in the frequency domain. The tilted particleboard allows testing without standing waves between the transmitter and the particleboard. This eliminates the need to evaluate several parallel planes and to search for values belonging to the tilted particleboard. The numerical requirements can be optimally exploited through a combination with a flaw detectability enhancement method. The results are supported by experiments on a wooden particleboard with flaw imitations. Finally, we showed, through a comparison with the usual procedure of identifying a flaw (calculating many parallel planes and then selecting the data belonging to the tilted plane), that the calculation of the tilted plane is up to 98.5% faster and improves the detectability of flaws in a tilted particleboard.

Application of Acoustical Holography to Flaw Detection

1971 ◽  
pp. 159-171
Author(s):  
J. B. Swint ◽  
B. G. W. Yee ◽  
N. H. Godbold
Keyword(s):  
Flaw Detection ◽  
Acoustical Holography

scholarly journals WiMAX Cell Level Simulation Platform Based on ns-2 and DSP Integration

2010 ◽  
Vol 56 (2) ◽  
pp. 169-176 ◽  
Author(s):  
Adam Flizikowski ◽  
Rafał Kozik ◽  
Henryk Gierszal ◽  
Marcin Przybyszewski ◽  
Witold Hołubowicz
Keyword(s):  
Channel Coding ◽  
Digital Signal ◽  
Ieee 802.16 ◽  
Connection Admission Control ◽  
Simulation Platform ◽  
Network Simulator ◽  
Simulation Environment ◽  
Cell Level ◽  
Novel Approach ◽  
Need To Evaluate

WiMAX Cell Level Simulation Platform Based on ns-2 and DSP IntegrationThe WiMAX (Worldwide Interoperability for Microwave Access) system based on the IEEE 802.16 family of standards is a promising technology for last-mile access. Both IEEE 802.16 and 3GPP-LTE systems candidate for becoming the 4G network of choice. The need to evaluate multiple performance enhancing techniques like MIMO, OFDM(A), novel channel coding schemes like non-binary LDPC codes, together with development of standards like IEEE 802.21, that aims at enabling handover and interoperability between heterogeneous network types, make rapid prototyping-based simulations an important issue. This paper presents a novel approach to 4G-oriented simulation environment that integrates popular network simulator (ns-2) and a Digital Signal Processing (DSP) to enable comprehensive link layer and cell level simulations. Proposed simulation environment is intended as an evaluation platform for assessing QoS/QoE and Connection Admission Control (CAC) algorithms designed for WiMAX systems. Moreover we study ways to improve simulation time (with focus on AWGN channel simulation) by using CUDA parallel processing technology for NVIDIA graphic cards.

scholarly journals A Novel Approach for the Determination of an Optimal Medium for Improving Rapid Micropropagation of Cucurbit Citrullus mucosospermus Fursa

2020 ◽  
pp. 184-192
Author(s):  
Gnamien Yah Gwladys ◽  
Koné Tchoa ◽  
Yao Kouakou Abessika Georges ◽  
Yatty Kouadio Justin ◽  
Zoro Bi Irié Arsène ◽  
...  
Keyword(s):  
Culture Medium ◽  
In Vitro Regeneration ◽  
Mineral Elements ◽  
Shoot Length ◽  
Experimental Planning ◽  
Usual Procedure ◽  
Novel Approach ◽  
Optimal Medium

The search for a suitable medium for In vitro regeneration, whatever the species cultured, is always done by tests including successive steps of removal of components of the culture medium that do not give the expected results. This is the usual procedure. However, the effects of interactions are not taken into account. It is therefore with the aim of taking into account the interactions between the constituents of the culture medium in the formulation of the medium that motivated the present study. Therefore, in order to find the optimal composition with a minimum of experiments or trials, experimental planning was a particularly useful tool. The results of the experiments are analyzed and recommended response values are calculated. A Box-Behnken design wasused by varying three factors: MS mineral elements, sucrose and 6-benzylaminopurine (BAP). Agar concentration has been kept constant. Shoot induction depended on the interaction between levels of sucrose, BAP and MS mineral elements in the medium. The optimum formulation for numerous shoots production is medium containing 1.5 strength of MS mineral elements, 35 g/l sucrose and 1 mg/l BAP solidified with 6 g/l agar. After 3 weeks of culture, 76.7% of the cotyledon explants (proximal parts) regenerated shoots with an average of 12 shoots per explant and a mean shoot length of 17 mm. Compared with the usual procedure, this procedure showed an increment of shoots number per explant and shoot length. The shoots regenerated were directly rooted. Overall, these results make a relevant contribution to the optimization of In vitro propagation of Citrullus mucosospermus Fursa oleaginous type and other hard to propagate related species.

Macroscale angled ultrasonic standing waves: A novel approach for particle manipulation

2017 ◽  
Vol 141 (5) ◽  
pp. 3505-3505
Author(s):  
Kedar C. Chitale ◽  
Walter Presz ◽  
Bart Lipkens ◽  
Benjamin P. Ross-Johnsrud ◽  
Miles Hyman ◽  
...  
Keyword(s):  
Standing Waves ◽  
Particle Manipulation ◽  
Novel Approach

A novel approach for global solar irradiation forecasting on tilted plane using Hybrid Evolutionary Neural Networks

2021 ◽  
Vol 287 ◽  
pp. 125577
Author(s):  
Billel Amiri ◽  
Antonio M. Gómez-Orellana ◽  
Pedro Antonio Gutiérrez ◽  
Rabah Dizène ◽  
César Hervás-Martínez ◽  
...  
Keyword(s):  
Neural Networks ◽  
Solar Irradiation ◽  
Evolutionary Neural Networks ◽  
Global Solar Irradiation ◽  
Novel Approach ◽  
Tilted Plane

Development of light-weight video-tracking technology for use in wildlife research: A case study on kangaroos

2020 ◽  
Vol 40 (3) ◽  
pp. 364-378 ◽  
Author(s):  
C.A. Herbert ◽  
M. Dassis ◽  
M. Pye ◽  
P.W. Jones ◽  
P.H.W. Leong ◽  
...  
Keyword(s):  
Plant Species ◽  
Spatial Scales ◽  
Diet Selection ◽  
Video Tracking ◽  
Environmental Data ◽  
Light Weight ◽  
Video Footage ◽  
Novel Approach ◽  
Need To Evaluate ◽  
Recipient Animal

There have been significant advances in the development of animal-borne sensor technologies, or biologgers, in recent years. This has resulted in tremendous capacity for wildlife researchers to remotely collect physiological, behavioural and social data from wildlife in circumstances that were unthinkable just decades ago. While this technology can provide us with a unique insight into the “secret lives” of wild animals, there is a need to evaluate the utility of these new sensors versus traditional wildlife research methodologies, and to critically evaluate the integrity of the data collected by ensuring that these devices themselves do not alter the physiology or behaviour of the recipient animal. This paper reports on the development of a light weight “animal borne video and environmental data collection system” (AVED), which can be deployed on animals as small as 11 kg, whilst still meeting the desired 3% body weight threshold. This AVED (referred to as the “Kangaroo-cam”) simultaneously collects video footage and GPS location data for an average of 19 h. Kangaroo-cams were deployed on seven kangaroos as a proof of concept of their potential utility for the study of location specific behaviour and diet in a medium-sized terrestrial herbivore. Following device recovery and data processing, we were able to successfully score 83 foraging events which allowed us to determine diet based on visual identification (to the family level) of plants consumed. This approach could be further broadened to include a comparison of plant species consumed versus plant species encountered to provide a novel approach to diet selection analysis. When combined with GPS mapping of foraging locations, this approach would allow researchers to address questions on diet selection at both fine (within patch) and broad (habitat) spatial scales, overcoming some of the limitations of traditional diet selection methodologies. However, animal capture and collar deployment caused a significant elevation in stress hormone concentrations within the first 24 h post-capture, which highlighted the need to incorporate a time-delay capacity into these devices. We conclude the paper by reviewing recent advances in the development of AVED technology and providing suggestions for the improvement of this Kangaroo-cam device.

Transmission Electron Diffraction Analysis by Computer

1970 ◽  
Vol 28 ◽  
pp. 40-41
Author(s):  
R.A. Ploc ◽  
G.H. Keech
Keyword(s):  
Electron Diffraction ◽  
Input Data ◽  
Reciprocal Lattice ◽  
Computer Programme ◽  
Transmission Electron Diffraction ◽  
Usual Procedure ◽  
Transmission Electron ◽  
Complex Shapes ◽  
Computer Input ◽  
Diffraction Effects

An unambiguous analysis of transmission electron diffraction effects requires two samplings of the reciprocal lattice (RL). However, extracting definitive information from the patterns is difficult even for a general orthorhombic case. The usual procedure has been to deduce the approximate variables controlling the formation of the patterns from qualitative observations. Our present purpose is to illustrate two applications of a computer programme written for the analysis of transmission, selected area diffraction (SAD) patterns; the studies of RL spot shapes and epitaxy.When a specimen contains fine structure the RL spots become complex shapes with extensions in one or more directions. If the number and directions of these extensions can be estimated from an SAD pattern the exact spot shape can be determined by a series of refinements of the computer input data.

Copper-dependent ATP7B up-regulation drives the resistance of TMEM16A-overexpressing head-and-neck cancer models to platinum toxicity

2019 ◽  
Vol 476 (24) ◽  
pp. 3705-3719 ◽  
Author(s):  
Avani Vyas ◽  
Umamaheswar Duvvuri ◽  
Kirill Kiselyov
Keyword(s):  
Oxidative Stress ◽  
Head And Neck ◽  
Transcriptional Activation ◽  
Platinum Resistance ◽  
Mrna Levels ◽  
Strong Positive Correlation ◽  
Platinum Compounds ◽  
Copper Chelation ◽  
Novel Approach ◽  
Cancer Models

Platinum-containing drugs such as cisplatin and carboplatin are routinely used for the treatment of many solid tumors including squamous cell carcinoma of the head and neck (SCCHN). However, SCCHN resistance to platinum compounds is well documented. The resistance to platinum has been linked to the activity of divalent transporter ATP7B, which pumps platinum from the cytoplasm into lysosomes, decreasing its concentration in the cytoplasm. Several cancer models show increased expression of ATP7B; however, the reason for such an increase is not known. Here we show a strong positive correlation between mRNA levels of TMEM16A and ATP7B in human SCCHN tumors. TMEM16A overexpression and depletion in SCCHN cell lines caused parallel changes in the ATP7B mRNA levels. The ATP7B increase in TMEM16A-overexpressing cells was reversed by suppression of NADPH oxidase 2 (NOX2), by the antioxidant N-Acetyl-Cysteine (NAC) and by copper chelation using cuprizone and bathocuproine sulphonate (BCS). Pretreatment with either chelator significantly increased cisplatin's sensitivity, particularly in the context of TMEM16A overexpression. We propose that increased oxidative stress in TMEM16A-overexpressing cells liberates the chelated copper in the cytoplasm, leading to the transcriptional activation of ATP7B expression. This, in turn, decreases the efficacy of platinum compounds by promoting their vesicular sequestration. We think that such a new explanation of the mechanism of SCCHN tumors’ platinum resistance identifies novel approach to treating these tumors.

Collecting Words: A Clinical Example of a Morphology-Focused Orthographic Intervention

2020 ◽  
Vol 51 (3) ◽  
pp. 544-560 ◽  
Author(s):  
Kimberly A. Murphy ◽  
Emily A. Diehm
Keyword(s):  
Written Language ◽  
Morphological Knowledge ◽  
English Orthography ◽  
Word Level ◽  
Novel Approach ◽  
Language Pathology ◽  
The One ◽  
Critical Intervention ◽  
Reading And Spelling ◽  
Reading And Spelling Difficulties

Purpose Morphological interventions promote gains in morphological knowledge and in other oral and written language skills (e.g., phonological awareness, vocabulary, reading, and spelling), yet we have a limited understanding of critical intervention features. In this clinical focus article, we describe a relatively novel approach to teaching morphology that considers its role as the key organizing principle of English orthography. We also present a clinical example of such an intervention delivered during a summer camp at a university speech and hearing clinic. Method Graduate speech-language pathology students provided a 6-week morphology-focused orthographic intervention to children in first through fourth grade ( n = 10) who demonstrated word-level reading and spelling difficulties. The intervention focused children's attention on morphological families, teaching how morphology is interrelated with phonology and etymology in English orthography. Results Comparing pre- and posttest scores, children demonstrated improvement in reading and/or spelling abilities, with the largest gains observed in spelling affixes within polymorphemic words. Children and their caregivers reacted positively to the intervention. Therefore, data from the camp offer preliminary support for teaching morphology within the context of written words, and the intervention appears to be a feasible approach for simultaneously increasing morphological knowledge, reading, and spelling. Conclusion Children with word-level reading and spelling difficulties may benefit from a morphology-focused orthographic intervention, such as the one described here. Research on the approach is warranted, and clinicians are encouraged to explore its possible effectiveness in their practice. Supplemental Material https://doi.org/10.23641/asha.12290687

Sign in / Sign up

Export Citation Format

Share Document