Muometric positioning system (μPS) with cosmic muons as a new underwater and underground positioning technique

Abstract Thus far, underwater and underground positioning techniques have been limited to those using classical waves (sound waves, electromagnetic waves or their combination). However, the positioning accuracy is strongly affected by the conditions of media they propagate (temperature, salinity, density, elastic constants, opacity, etc.). In this work, we developed a precise and entirely new three-dimensional positioning technique with cosmic muons. This muonic technique is totally unaffected by the media condition and can be universally implemented anywhere on the globe without a signal transmitter. Results of our laboratory-based experiments and simulations showed that, for example, plate-tectonics-driven seafloor motion and magma-driven seamount deformation can be detected with the μPS.

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Non-contact three-dimensional cell cluster formation on demand in open dishware using focused surface acoustic waves through a couplant layer

10.22541/au.163822587.77984326/v1 ◽

2021 ◽

Author(s):

Jiyang Mei ◽

Aditya Vasan ◽

Uri Magaram ◽

Kenjiro Takemura ◽

Sreekanth Chalasani ◽

...

Keyword(s):

Acoustic Waves ◽

Drug Testing ◽

Cluster Formation ◽

Surface Acoustic Waves ◽

Three Dimensional ◽

Petri Dish ◽

Hek293 Cells ◽

Sound Waves ◽

The Media ◽

Dimensional Cell

Three-dimensional cell agglomerates are broadly useful in tissue engineering and drug testing. We report a well-free method to form large (1-mm) multicellular clusters using 100-MHz surface acoustic waves (SAW) without direct contact with the media or cells. A fluid couplant is used to transformthe SAW into acoustic streaming in the cell-laden media held in a petri dish. The couplant transmits longitudinal sound waves, forming a Lamb wave in the petri dish that, in turn, produces longitudinal sound in the media. Due to recirculation, human embryonic kidney (HEK293) cells in the dish are carried to the center of the coupling location, forming a cluster in less than 10 min. A few minutes later, these clusters may then be translated and merged to form large agglomerations, and even repeatedly folded to produce a roughly spherical shape of over 1 mm in diameter for incubation—without damaging the existing intercellular bonds. Calcium ion signaling through these clusters and confocal images of multiprotein junctional complexes suggest a continuous tissue construct: intercellular communication. They may be formed at will, and the method is feasibly useful for formation of numerous agglomerates in a single petri dish.

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Homogenization and Mass Identity vs. Individual Identity. An Analysis in the Light of the Theory of “The Three Dimensional Spiral of Sense

European Journal of Interdisciplinary Studies ◽

10.26417/ejis.v2i2.p40-48 ◽

2016 ◽

Vol 2 (2) ◽

pp. 40

Author(s):

Miriam Aparicio

Keyword(s):

Three Dimensional ◽

Individual Identity ◽

Cognitive Effects ◽

The Media

This study tests some hypotheses included in the psycho-social-communicational paradigm, which emphasizes the cognitive effects of the media and the role of the psychosocial subject as the recipient

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An innovative prone positioning system for advanced deformity and frailty in complex spine surgery

Journal of Neurosurgery Spine ◽

10.3171/2019.7.spine19161 ◽

2020 ◽

Vol 32 (2) ◽

pp. 229-234

Author(s):

Benjamin Kolb ◽

John Large ◽

Stuart Watson ◽

Glyn Smurthwaite

Keyword(s):

Ankylosing Spondylitis ◽

Three Dimensional ◽

Technical Note ◽

Positioning System ◽

Prone Positioning ◽

Economic Implications ◽

Potential Safety ◽

Chest Deformity ◽

Positioning Device ◽

Skin Quality

The authors present a technical note for a prone positioning system developed to facilitate cervical extension osteotomy for ankylosing spondylitis in the presence of severe deformity and frailty. Chin-on-chest deformity represents one of the most debilitating changes of ankylosing spondylitis. Where the chin-brow angle approaches or exceeds 90°, prone positioning becomes problematic due to the fixed position of the head. Furthermore, the challenge is compounded where physiological deconditioning leads to frailty, and the side effects of medical therapies decrease muscle mass and skin quality. Conventional prone positioning equipment is not able to cater to all patients. A versatile system was developed using a 3D reconstruction to enable a positioning simulation and verification tool. The tool was used to comprehensively plan the perioperative episode, including spatial orientation and associated equipment. Three-dimensional printing was used to manufacture a bespoke positioning device that precisely matched the contours of the patient, reducing contact pressure and risk of skin injury. The authors were able to safely facilitate surgery for a patient whose deformity and frailty may otherwise have precluded this possibility. The system has potential safety and economic implications that may be of significant utility to other institutions engaging in complex spinal surgery.

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Investigation of a 3D undersea positioning system using electromagnetic waves

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2020.3048584 ◽

2021 ◽

pp. 1-1

Author(s):

Ryosuke Kato ◽

Masaharu Takahashi ◽

Nozomu Ishii ◽

Qiang Chen ◽

Hiroshi Yoshida

Keyword(s):

Electromagnetic Waves ◽

Positioning System

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Study on Magnetic Barrel Machine Equipped with Three-Dimensional Arrangement of Magnets

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.329.761 ◽

2007 ◽

Vol 329 ◽

pp. 761-766 ◽

Cited By ~ 1

Author(s):

Y. Zhang ◽

Masato Yoshioka ◽

Shin-Ichiro Hira

Keyword(s):

High Speed ◽

Permanent Magnets ◽

Three Dimensional ◽

Video Camera ◽

High Speed Video ◽

High Speed Video Camera ◽

The Media ◽

Set Up

At present, a commercially available magnetic barrel machine equipped with permanent magnets has some faults arising from constructional reason. That is, grinding or finishing ability is different from place to place in the machining region, resulting in the limitation on the region we can use in the container of workpieces. Therefore, in this research, authors made the new magnetic barrel machine equipped with three dimensional (3D) magnet arrangement to overcome these faults. The grinding ability of the new 3D magnetic barrel machine converted was experimentally examined, and compared with that of the traditional magnetic barrel machine. As a result, it was shown that we can use much broader region in the new 3D machine. It was also shown that the grinding ability became higher. The distribution of barrel media in action was recorded by means of a high speed video camera. It was clarified that the media rose up higher and were distributed more uniformly in the container by the effect of the magnet block newly set up. It was supposed that this must be the reason for the above-mentioned improvement of grinding ability.

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SEISMIC WAVE PROPAGATION IN POROUS GRANULAR MEDIA

Geophysics ◽

10.1190/1.1438261 ◽

1956 ◽

Vol 21 (3) ◽

pp. 691-714 ◽

Cited By ~ 27

Author(s):

Norman R. Paterson

Keyword(s):

Granular Media ◽

Experimental Studies ◽

Seismic Wave Propagation ◽

Beach Sand ◽

Sound Waves ◽

Filling Materials ◽

Porosity And Permeability ◽

Size Sorting ◽

The Media ◽

A Charge

Theoretical and experimental studies have been made of the manner in which sound waves are propagated in porous granular aggregates. A cylindrical piezo‐electric source is used and this simulates the explosion of a charge in a seismic shot‐hole. It is found that in general two waves of volume expansion are propagated and that these involve coupled displacements of both constituents of the media. The waves are termed frame‐waves, air‐waves or liquid‐waves depending upon the nature of the pore‐filler and the relative displacements of the constituents. The frame‐wave velocity is dependent upon the strength of the frame, the densities of solid and pore‐filling materials and the texture of the medium. Air‐ and liquid‐wave velocities are related to the texture of the medium and to the density and viscosity of the pore‐filler. Frame‐strength is important to a lesser degree. Waves are dispersive only in the case of media of very low permeability. Attenuation is related to viscosity, texture and frequency. Scattering is probably important only at the highest frequencies and largest particle diameters used in the experiments. It is shown that porosity and permeability of a beach sand can be inferred from velocity measurements. These properties provide information regarding grain‐size, sorting and the nature of the pore‐filler.

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Spiral Sound Wave Transducer Based on the Longitudinal Vibration

Sensors ◽

10.3390/s18113674 ◽

2018 ◽

Vol 18 (11) ◽

pp. 3674 ◽

Cited By ~ 5

Author(s):

Wei Lu ◽

Yu Lan ◽

Rongzhen Guo ◽

Qicheng Zhang ◽

Shichang Li ◽

...

Keyword(s):

Sound Wave ◽

Longitudinal Vibration ◽

Three Dimensional ◽

Low Frequency ◽

Sound Field ◽

Field Measurements ◽

Sound Waves ◽

Underwater Sound ◽

Three Dimensional Finite Element ◽

Wave Transducer

A spiral sound wave transducer comprised of longitudinal vibrating elements has been proposed. This transducer was made from eight uniform radial distributed longitudinal vibrating elements, which could effectively generate low frequency underwater acoustic spiral waves. We discuss the production theory of spiral sound waves, which could be synthesized by two orthogonal acoustic dipoles with a phase difference of 90 degrees. The excitation voltage distribution of the transducer for emitting a spiral sound wave and the measurement method for the transducer is given. Three-dimensional finite element modeling (FEM)of the transducer was established for simulating the vibration modes and the acoustic characteristics of the transducers. Further, we fabricated a spiral sound wave transducer based on our design and simulations. It was found that the resonance frequency of the transducer was 10.8 kHz and that the transmitting voltage resonance was 140.5 dB. The underwater sound field measurements demonstrate that our designed transducer based on the longitudinal elements could successfully generate spiral sound waves.

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Conductas disruptivas desde la óptica del docente: validación de una escala

Anales de Psicología ◽

10.6018/analesps.32.3.223251 ◽

2016 ◽

Vol 32 (3) ◽

pp. 855 ◽

Cited By ~ 1

Author(s):

Marina Álvarez-Hernández ◽

Pilar Castro-Pañeda ◽

Carmen González-González-de-Mesa ◽

Eva Álvarez-Martino ◽

María Ángel Campo-Mon

Keyword(s):

Factor Analysis ◽

Confidence Level ◽

Three Dimensional ◽

Dimensional Structure ◽

Factorial Structure ◽

Font Size ◽

Classroom Behaviour ◽

Educational Professionals ◽

The Media ◽

Components Analysis

In recent years difficulties in the field of teaching have increased considerably, due to what it is known as disruptive classroom behaviour. Proof of this can be seen in the fact that this topic is the focus of numerous recent studies and also in the fact that this question appears frequently in the media. The main purpose of this study is to validate a scale in order to know objectively the views of educational professionals about disruptive classroom behaviours. Taking into account previous literature and working with a panel of experts, a new scale of 15 items was developed. The scale was distributed to a sample composed of 346 professionals with an average age of 43. <span style="font-family: 'Times New Roman',serif; font-size: 12pt; mso-fareast-font-family: 'MS Mincho'; mso-fareast-theme-font: minor-fareast; mso-fareast-language: ES; mso-ansi-language: ES-TRAD; mso-bidi-language: AR-SA;" lang="ES-TRAD">An exploratory factor analysis, a principal components analysis and an analysis of correlations between factors were applied. Such analyses <span style="font-family: 'Times New Roman',serif; font-size: 12pt; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: ES; mso-ansi-language: ES-TRAD; mso-bidi-font-weight: bold; mso-bidi-language: AR-SA;" lang="ES-TRAD">have confirmed that the factorial structure of the scales converges towards the anticipated factors and it reaffirms its weight and confidence level. It can be concluded from this that the scale is valid for measuring the perception of teachers regarding the question being studied. The data indicates an optimum fit of the three-dimensional structure to the items of the scale.

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