Visualization of the Body Front-Face Area Based on Total Field Reconstruction

2006 ◽  
Author(s):  
V. Tabatadze ◽  
D. Kakulia ◽  
G. Ghvedashvili ◽  
G. Saparishvili ◽  
R. Zaridze
Keyword(s):  
The Body ◽  
Front Face ◽  
Total Field ◽  
Field Reconstruction ◽  
Face Area

scholarly journals Splash formation at the nose of a smoothly curved body in a stream

1999 ◽  
Vol 40 (4) ◽  
pp. 421-436 ◽  
Author(s):  
E. O. Tuck ◽  
S. T. Simakov
Keyword(s):  
Integral Equation ◽  
Free Surface ◽  
Velocity Potential ◽  
Integral Form ◽  
The Body ◽  
Front Face ◽  
Separation Condition ◽  
Polygonal Approximation ◽  
Side Condition ◽  
Two Dimensional Flow

AbstractIn two-dimensional flow past a body close to a free surface, the upwardly diverted portion may separate to form a splash. We model the nose of such a body by a semi-infinite obstacle of finite draft with a smoothly curved front face. This problem leads to a nonlinear integral equation with a side condition, a separation condition and an integral constraint requiring the far-upstream free surface to be asymptotically plane. The integral equation, called Villat's equation, connects a natural parametrisation of the curved front face with the parametrisation by the velocity potential near the body. The side condition fixes the position of the separation point, whereas the separation condition, known as the Brillouin-Villat condition, imposes a continuity relation to be satisfied at separation. For the described flow we derive the Brillouin-Villat condition in integral form and give a numerical solution to the problem using a polygonal approximation to the front face.

A METHOD FOR COMPUTING THE TOTAL MAGNETIZATION VECTOR AND THE DIMENSIONS OF A RECTANGULAR BLOCK‐SHAPED BODY FROM MAGNETIC ANOMALIES

Geophysics ◽  
1966 ◽  
Vol 31 (1) ◽  
pp. 74-96 ◽  
Author(s):  
B. K. Bhattacharyya
Keyword(s):  
High Speed ◽  
Magnetization Vector ◽  
The Body ◽  
Total Field ◽  
Unknown Parameters ◽  
Factors Affecting ◽  
Vertical Derivative ◽  
Correct Location ◽  
Unit Of Length

In this paper is presented a new method for determining the following parameters of a uniformly magnetized body of rectangular prismatic shape: (i) horizontal dimensions, (ii) depths to the top and bottom of the body, and (iii) intensity and direction of magnetization. Accuracy in the computation of these parameters is highly dependent on the correct location of the center and on the determination of the major and minor axes of the body. An iterative method of calculations is used. This method is considerably aided not only by the second vertical derivative map of the observed total field but also by the total field reduced to the pole and its second vertical derivative map. The horizontal dimensions are determined by noting the location of the maximum of the odd component of the second vertical derivative about the center of the body. These dimensions are estimated with high accuracy when they are greater than the depth to the top of the body. The remaining unknown parameters of the body are calculated with the help of the first horizontal and vertical derivatives and the total field at the origin in the plane of observation which is directly above the center of the body. The present method also requires the total‐field value at the point one‐half unit of length above the origin. The factors affecting the accuracy in the calculation of the parameters are discussed in detail. With the help of high‐speed digital computers, this method can be used with great advantage for computation of the above parameters of magnetized bodies giving rise to a number of anomalies over a particular area.

An inverse scattering technique for electromagnetic bistatic scattering

1969 ◽  
Vol 47 (11) ◽  
pp. 1177-1184 ◽  
Author(s):  
V. H. Weston ◽  
W. M. Boerner
Keyword(s):  
Plane Wave ◽  
Scattered Field ◽  
Convex Surface ◽  
The Body ◽  
Total Field ◽  
Convex Shape ◽  
Plane Wave Incident ◽  
Smooth Body ◽  
Equivalent Sources ◽  
The Fourier Transform

It is shown that the total field produced by a plane wave incident upon a scattering body can be expressed at all points in space as the sum of the incident field and the Fourier transform of a quantity which is related to the scattering matrix. For points exterior to the minimum convex surface enclosing the body, the scattered field is reducible to a plane-wave representation which requires knowledge of the bistatic scattered field, for a fixed frequency and direction of incidence. It is shown that for certain cases, the resulting expression for the bistatic scattered field may be employed in interior portions of the minimum convex shape (including the body) in which case it represents the field arising from a set of equivalent sources. Alternative representations are also given. A technique is presented which yields the surface of a perfectly-conducting piecewise-smooth body from knowledge of the local total field. To achieve uniqueness, the technique must be applied for at least two different frequencies. Numerical results are presented which illustrate the technique.

Total Field Reconstruction in the Near Field Using Pseudo-Vector $E$ -Field Measurements

2019 ◽  
Vol 61 (2) ◽  
pp. 476-486 ◽  
Author(s):  
Serge Pfeifer ◽  
Eduardo Carrasco ◽  
Pedro Crespo-Valero ◽  
Esra Neufeld ◽  
Sven Kuhn ◽  
...  
Keyword(s):  
Near Field ◽  
Field Measurements ◽  
Total Field ◽  
Field Reconstruction

scholarly journals CNN-Based Multimodal Human Recognition in Surveillance Environments

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3040 ◽  
Author(s):  
Ja Koo ◽  
Se Cho ◽  
Na Baek ◽  
Min Kim ◽  
Kang Park
Keyword(s):  
Recognition Accuracy ◽  
Recognition Performance ◽  
Error Rates ◽  
The Body ◽  
Outdoor Environment ◽  
Front Face ◽  
Body Images ◽  
Human Recognition ◽  
Custom Made ◽  
The Face

In the current field of human recognition, most of the research being performed currently is focused on re-identification of different body images taken by several cameras in an outdoor environment. On the other hand, there is almost no research being performed on indoor human recognition. Previous research on indoor recognition has mainly focused on face recognition because the camera is usually closer to a person in an indoor environment than an outdoor environment. However, due to the nature of indoor surveillance cameras, which are installed near the ceiling and capture images from above in a downward direction, people do not look directly at the cameras in most cases. Thus, it is often difficult to capture front face images, and when this is the case, facial recognition accuracy is greatly reduced. To overcome this problem, we can consider using the face and body for human recognition. However, when images are captured by indoor cameras rather than outdoor cameras, in many cases only part of the target body is included in the camera viewing angle and only part of the body is captured, which reduces the accuracy of human recognition. To address all of these problems, this paper proposes a multimodal human recognition method that uses both the face and body and is based on a deep convolutional neural network (CNN). Specifically, to solve the problem of not capturing part of the body, the results of recognizing the face and body through separate CNNs of VGG Face-16 and ResNet-50 are combined based on the score-level fusion by Weighted Sum rule to improve recognition performance. The results of experiments conducted using the custom-made Dongguk face and body database (DFB-DB1) and the open ChokePoint database demonstrate that the method proposed in this study achieves high recognition accuracy (the equal error rates of 1.52% and 0.58%, respectively) in comparison to face or body single modality-based recognition and other methods used in previous studies.

Part I: Chordwise Distribution of Fluctuating Pressure

1981 ◽  
Vol 32 (2) ◽  
pp. 97-110 ◽  
Author(s):  
R.H. Wilkinson
Keyword(s):  
Vortex Shedding ◽  
Bluff Body ◽  
Lift Coefficient ◽  
Relative Magnitude ◽  
The Body ◽  
Front Face ◽  
Two Dimensional ◽  
Fluctuating Pressure ◽  
Pressure Distributions ◽  
Dimensional Section

SummaryThe fluctuating loading on a cylindrical bluff body due to vortex shedding increases if the body is capable of vibration. This is a result of amplification of the fluctuating pressures around a two-dimensional section of the body together with an improvement of the spanwise correlation of the vortex shedding. Measurement of the fluctuating forces on the cylinder during this process gives no guide as to the relative magnitude of these effects. In this paper, root mean square fluctuating pressure distributions and pressure correlations across a chord are presented for a square cylinder with front face normal to the approach flow whilst stationary and during forced vibration. The fluctuating lift coefficient for a two-dimensional section of the cylinder and its maximum amplification during vibration are calculated.

scholarly journals INFLUENCE OF MODIFYING AGENT WITH HYDROPHOBIZATION EFFECT ON INCREASE OF OPERATIONAL CHARACTERISTICS OF VIBROPRESSED PRODUCTS

2019 ◽  
pp. 8-13
Author(s):  
Л. Сулейманова ◽  
L. Suleymanova ◽  
М. Малюкова ◽  
M. Malyukova ◽  
А. Слепухин ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Frost Resistance ◽  
Front Face ◽  
Concrete Compressive Strength ◽  
Modifying Agent ◽  
Face Area ◽  
Operational Characteristics ◽  
Negative Role ◽  
Geometrical Dimensions

In the article the method of volumetric hydrophobization by insertion of modifying agents with hydrophobization effect directly in concrete mixture on the stage of mixing is considered and the degree of their influence on physics-mathematics properties of vibropressed products which made on technological line with optimal granulometry, water to cement proportion and parameters of forming is estimated, so that the geometrical dimensions of moulded products satisfy required sizes and limits, and appearance of front-face area satisfied A3 category. There was established the increase of operational characteristics of concrete walkway vibropressed slabs when in use of polyfunctional modifying agents with hydrophobization effect – Murasan BWA 17 and SikaPaver AE-2 in 0.5 % cement weight quantity, wherein there was found the increase of compressive strength of slabs on 23 %, frost resistance on 50 cycles and decrease of water absorption up to 45 % which allows increasing the longevity of small-pieces products. Insertion of volumetric modifier-hydrophobisator Akvasil, only with a mono-characteristic to decrease of water absorption, has negative role on strength characteristics of vibropressed products with decrease of concrete compressive strength by 12 %.

CONCEPTUAL STUDY OF VYANGA W.S.R. MELASMA

2021 ◽  
Vol 09 (3) ◽  
pp. 580-583
Author(s):  
Shivaleela. S. Kalyani ◽  
Sunil.x Sunil. Khandare
Keyword(s):  
Adverse Effects ◽  
Clinical Features ◽  
Physical State ◽  
Medical Science ◽  
The Body ◽  
Topical Steroids ◽  
Face Area ◽  
The Face ◽  
Conceptual Study ◽  
Good Number

Vyanga is one of the Kshudraroga1, characterized by the presence of painless, bluish-black patches on face. On the basis of clinical features, it can be compared with Facial melasma. Melasma is characterized by dark, discolored patches on skin. It's also called chloasma. It typically occurs in the face and symmet-rical, with matching marks on both sides of the face. Area of the body which exposed to sun can also de-velop melasma. According to Ayurveda, vitiated Dosha mainly Pitta along with Vata produce blackish patches on the face which is called Vyanga. Vyanga is Rakta Pradoshaj Vikar and in its Doshas involved is Udana Vayu, Bhajrak Pitta and Dushya Rasa and Rakta Dhatu, as this condition disturbed our mental and physical state. In modern medical science, topical steroids have been described in the management of faci-al melasma. However, the topical steroids are may cause adverse effects such as irritation, rashes etc. and are expensive too. Ayurveda treatment includes Abhyanga with Taila, Lepa, Pradeha, Nasya, Rak-tamokshana etc. Ayurveda mentions a good number of drugs like Kusthaghna, Kandughna, Raktasho-dhaka, Twakprasadaka and Varnyakara properties e.g. Arjuna, Nimba, Manjistha are helpful in manage-ment and can produce cutaneous depigmentation that remove the blackish discoloration of skin.

Two‐dimensional transient electromagnetic responses

Geophysics ◽  
1985 ◽  
Vol 50 (12) ◽  
pp. 2849-2861 ◽  
Author(s):  
Jopie I. Adhidjaja ◽  
Gerald W. Hohmann ◽  
Michael L. Oristaglio
Keyword(s):  
Magnetic Field ◽  
Half Space ◽  
Time Domain ◽  
The Body ◽  
Two Dimensional ◽  
Total Field ◽  
Secondary Field ◽  
Field Solution ◽  
Transient Electromagnetic ◽  
Simple Boundary

The time‐domain electromagnetic (TEM) modeling method of Oristaglio and Hohmann is reformulated here in terms of the secondary field. This finite‐difference method gives a direct, explicit time‐domain solution for a two‐dimensional body in a conductive earth by advancing the field in time with DuFort‐Frankel time‐differencing. As a result, solving for the secondary field, defined as the difference between the total field and field of a half‐space, is not only more efficient but is also simpler and eliminates several problems inherent in the solution for the total field. For example, because the secondary field varies slowly both in space and time, it can be modeled on a coarse grid with large time steps. In addition, for a simple body the field is local; therefore, because the field can be assumed to satisfy a simple boundary condition in the earth computation is greatly simplified. Our tests show that for the same accuracy, the secondary‐field solution is roughly five times faster than the total‐field solution. We compute and analyze the magnetic field impulse response for a suite of models, most of which consist of a thin body embedded in a conductive half‐space—with or without overburden. The results indicate the conductive half‐space will both delay and attenuate the response of the body and even obscure it if the conductivity contrast is small. The results also suggest that the conductive host can alter the decay rate of the response of the body from its free‐space counterpart. Our results for multiple bodies illustrate the importance of early‐time measurements to obtain resolution, particularly for measurements of the horizontal magnetic field. The vertical magnetic field, however, can be used to infer the dip direction of a dipping body by studying the migration of the crossover. The results for models which include overburden show that the effect of a conductive overburden, in addition to the half‐space effect, is to delay the response of the body, because the primary current initially tends to concentrate and slowly diffuse through the overburden, and does not reach the body until later time. This effect also complicates the early‐times profiles, becoming more severe as the conductivity of the overburden is increased.

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