scholarly journals Mechanical competence of ovariectomy-induced compromised bone after single or combined treatment with high-frequency loading and bisphosphonates

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
G. V. Camargos ◽  
P. Bhattacharya ◽  
G. H. van Lenthe ◽  
A. A. Del Bel Cury ◽  
I. Naert ◽  
...  
Keyword(s):  
High Frequency ◽  
Combined Treatment

scholarly journals Combined Technology for the Parts Recovery Operating in Stress Factor Conditions

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Olena V. Berezshnaya ◽  
Valeriy D. Kassov ◽  
Eduard P. Gribkov
Keyword(s):  
Stress Concentration ◽  
High Frequency ◽  
Local Heating ◽  
Combined Treatment ◽  
Stress Factor ◽  
Treatment Conditions ◽  
Furnace Treatment ◽  
Deposited Metal ◽  
Insulation Effect ◽  
Low Sensitivity

The structural factor of samples microplasticity deposited with carbon steel construction tapes in connection with the different sensitivities of the deposited metal to stress concentration was investigated. The most favorable structure of the deposited layer, which is characterized by low sensitivity to stress concentration, is found. The combined technology of parts recovery modes operating in stress factor conditions is given. The covering agent composition, which allows to reduce the energy consumption during heat treatment of the deposited samples after treatment with high-frequency currents, to increase the thermal insulation effect approaching to the furnace treatment conditions, was developed. It was established that retarded cooling in the covering agent of deposited samples after local heating with high-frequency currents provides the increase in the average pressure ferrite during increase in the grain size. It was established that for parts operating under cyclic loading, the structure obtained as a result of combined treatment is the least sensitive to stress concentration.

High-frequency repetitive transcranial magnetic stimulation in schizophrenia: a combined treatment and neuroimaging study

2004 ◽  
Vol 34 (7) ◽  
pp. 1157-1163 ◽  
Author(s):  
G. HAJAK ◽  
J. MARIENHAGEN ◽  
B. LANGGUTH ◽  
S. WERNER ◽  
H. BINDER ◽  
...  
Keyword(s):  
Depressive Symptoms ◽  
Transcranial Magnetic Stimulation ◽  
High Frequency ◽  
Magnetic Stimulation ◽  
Negative Symptoms ◽  
Repetitive Transcranial Magnetic Stimulation ◽  
Combined Treatment ◽  
Emission Computed Tomography ◽  
Positive Symptoms ◽  
Schizophrenic Patients

Background. Repetitive transcranial magnetic stimulation (rTMS) of frontal brain regions is under study as a non-invasive method in the treatment of affective disorders. Recent publications provide increasing evidence that rTMS may be useful in treating schizophrenia. Results are most intriguing, demonstrating a reduction of negative symptoms following high-frequency rTMS. In this context, disentangling of negative and depressive symptoms is of the utmost importance when understanding specific rTMS effects on schizophrenic symptoms.Method. Using a sham-controlled parallel design, 20 patients with schizophrenia were included in the study. Patients were treated with high-frequency 10 Hz rTMS over 10 days. Besides clinical ratings, ECD-SPECT (technetium-99 bicisate single photon emission computed tomography) imaging was performed before and after termination of rTMS treatment.Results. High-frequency rTMS leads to a significant reduction of negative symptoms combined with a trend for non-significant improvement of depressive symptoms in the active stimulated group as compared with the sham stimulated group. Additionally, a trend for worsening of positive symptoms was observed in the actively treated schizophrenic patients. In both groups no changes in regional cerebral blood flow could be detected by ECD-SPECT.Conclusions. Beneficial effects of high-frequency rTMS on negative and depressive symptoms were found, together with a trend for worsening positive symptoms in schizophrenic patients.

scholarly journals Combined Treatment Effect of High Frequency Therapy with Sharp-Toothed Eel Extract on Men's Skin

KSBB Journal ◽  
2011 ◽  
Vol 26 (3) ◽  
pp. 260-265
Author(s):  
Hyun-Ju No ◽  
Yoon-Soo Kim ◽  
Hyung-Gun Nam ◽  
Hyun-Jae Shin ◽  
Eun-Mi Ryu ◽  
...  
Keyword(s):  
Treatment Effect ◽  
High Frequency ◽  
Combined Treatment

scholarly journals Approaches to the development of individualized schemes for treatment of otitis media with effusion in patients with low efficiency of traditional conservative therapy

2011 ◽  
Vol 10 (3) ◽  
pp. 120-124
Author(s):  
D. D. Ochirov ◽  
N. V. Scherbik ◽  
Ye. N. Kologrivova ◽  
A. V. Starokha
Keyword(s):  
Otitis Media ◽  
High Frequency ◽  
Conservative Therapy ◽  
Otitis Media With Effusion ◽  
Combined Treatment ◽  
Pure Tone Audiometry ◽  
Subjective Response ◽  
Treatment Efficiency ◽  
High Prevalence ◽  
Low Efficiency

Management of otitis media with effusion is a challenging problem in view of its high prevalence and frequent complications in the form of stable hearing loss. High frequency of secondary immunodeficiencies in ENT diseases dictates the necessity of immunocorrection in combined treatment. Dinamic pure tone audiometry, tympanometry and subjective response demonstrated higher treatment efficiency in the «Gepon» groups.

scholarly journals The application of EHF therapy for the combined treatment of severe poisoning with the scolding liquids

2016 ◽  
Vol 15 (4) ◽  
pp. 194-202
Author(s):  
Amayak Vasgrenovich Badalyan ◽  
E. A Chukina ◽  
Yu. S Gol’dfarb ◽  
V. A Shchetkin ◽  
N. V Borovkova ◽  
...  
Keyword(s):  
Erythrocyte Sedimentation Rate ◽  
Sedimentation Rate ◽  
High Frequency ◽  
Normal Values ◽  
Combined Treatment ◽  
Shear Velocity ◽  
Medical Rehabilitation ◽  
Pronounced Increase ◽  
Erythrocyte Sedimentation ◽  
Extremely High Frequency

The objective of the present study was to compare the results of the treatment and changes in the measurements of the laboratory characteristics in the patients suffering from severe poisoning with the scolding liquids under effect of the combined treatment including the application of extremely high frequency electromagnetic radiation (EHF therapy). The study included ten patients given a course of EHF therapy and 10 ones treated without it. The patients of the two groups developed the oppositely directed alterations in the rheological properties of blood and hemostasis including the elevation of the hemorheological viscoelastic constituent, erythrocyte and platelet aggregation, the increase in blood viscosity at a high shear velocity and, conversely, its decrease at the low and moderate shear velocities and hematocrit. Moderate leukocytosis was observed during this period along with the 3-4 rise in the concentration of lymphocytes involved in the apoptotic process and the substantial increase (1,4 - 8,1 times) in the values of parameters of endotoxicosis (the leukocytic index of intoxication and the erythrocyte sedimentation rate). The use of EHF therapy for the management of this category of the patients at the stage of their medical rehabilitation produced a modulating hemorheological effect manifested as the reduction of the elevated hemorheological characteristics, with the especially pronounced increase in the parameters below the respective normal values. In the group comprising the control patients, the undesirable changes occurred more frequently than in the previous one; specifically, deviations of the parameters of interest from their normal values were more pronounced. EHF therapy resulted in the reduction of the concentration of dead leukocytes in blood and a two-fold decrease in the amount of lymphocytes at the later stages of apoptosis whereas the concentration of the lymphocytes just entering apoptosis was elevated; this situation reflected the process of sanogenesis. In contrast, this parameter decreased in the patients of the group of comparison. The reduction in the level of endogenous intoxication under effect of EHF therapy manifested itself as a more significant decrease of leukocytic index of intoxication and erythrocyte sedimentation rate in the patients of the main group in comparison with those of the group of comparison. It is concluded that the inclusion of EHF therapy in the combined treatment of severe poisoning with the scolding liquids reduces the time of epithelization of gastrointestinal mucosa by 4.7 days on the average. Accordingly, the duration of the hospital stay can be decreased by 3.8 days.

The Microstructure of Steatite (Protoenstatite)

1985 ◽  
Vol 43 ◽  
pp. 236-237
Author(s):  
W. E. Lee ◽  
A. H. Heuer
Keyword(s):  
High Frequency ◽  
Glass Ceramics ◽  
Magnesium Silicate ◽  
Beam Current ◽  
Glassy Matrix ◽  
Angle Of Incidence ◽  
X Ray ◽  
Mechanical And Electrical Properties ◽  
Argon Ions ◽  
High Temperature Polymorph

IntroductionTraditional steatite ceramics, made by firing (vitrifying) hydrous magnesium silicate, have long been used as insulators for high frequency applications due to their excellent mechanical and electrical properties. Early x-ray and optical analysis of steatites showed that they were composed largely of protoenstatite (MgSiO3) in a glassy matrix. Recent studies of enstatite-containing glass ceramics have revived interest in the polymorphism of enstatite. Three polymorphs exist, two with orthorhombic and one with monoclinic symmetry (ortho, proto and clino enstatite, respectively). Steatite ceramics are of particular interest a they contain the normally unstable high-temperature polymorph, protoenstatite.Experimental3mm diameter discs cut from steatite rods (∼10” long and 0.5” dia.) were ground, polished, dimpled, and ion-thinned to electron transparency using 6KV Argon ions at a beam current of 1 x 10-3 A and a 12° angle of incidence. The discs were coated with carbon prior to TEM examination to minimize charging effects.

Simulations of high-resolution images of amorphous silicon films

1986 ◽  
Vol 44 ◽  
pp. 544-545
Author(s):  
G. Y. Fan ◽  
J. M. Cowley
Keyword(s):  
Electron Microscope ◽  
High Frequency ◽  
Fourier Transformation ◽  
Amorphous Materials ◽  
Low Frequency ◽  
Chromatic Aberration ◽  
Structure Information ◽  
Frequency Components ◽  
High Resolution Images ◽  
Spatial Frequency Spectrum

It is well known that the structure information on the specimen is not always faithfully transferred through the electron microscope. Firstly, the spatial frequency spectrum is modulated by the transfer function (TF) at the focal plane. Secondly, the spectrum suffers high frequency cut-off by the aperture (or effectively damping terms such as chromatic aberration). While these do not have essential effect on imaging crystal periodicity as long as the low order Bragg spots are inside the aperture, although the contrast may be reversed, they may change the appearance of images of amorphous materials completely. Because the spectrum of amorphous materials is continuous, modulation of it emphasizes some components while weakening others. Especially the cut-off of high frequency components, which contribute to amorphous image just as strongly as low frequency components can have a fundamental effect. This can be illustrated through computer simulation. Imaging of a whitenoise object with an electron microscope without TF limitation gives Fig. 1a, which is obtained by Fourier transformation of a constant amplitude combined with random phases generated by computer.

SEM image sharpness analysis

1996 ◽  
Vol 54 ◽  
pp. 142-143
Author(s):  
M. T. Postek ◽  
A. E. Vladar
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Quantitative Information ◽  
Primary Electron ◽  
Image Sharpness ◽  
Critical Dimensions ◽  
Sem Image ◽  
Frequency Changes ◽  
Electron Microscopes ◽  
Scanning Electron

Fully automated or semi-automated scanning electron microscopes (SEM) are now commonly used in semiconductor production and other forms of manufacturing. The industry requires that an automated instrument must be routinely capable of 5 nm resolution (or better) at 1.0 kV accelerating voltage for the measurement of nominal 0.25-0.35 micrometer semiconductor critical dimensions. Testing and proving that the instrument is performing at this level on a day-by-day basis is an industry need and concern which has been the object of a study at NIST and the fundamentals and results are discussed in this paper.In scanning electron microscopy, two of the most important instrument parameters are the size and shape of the primary electron beam and any image taken in a scanning electron microscope is the result of the sample and electron probe interaction. The low frequency changes in the video signal, collected from the sample, contains information about the larger features and the high frequency changes carry information of finer details. The sharper the image, the larger the number of high frequency components making up that image. Fast Fourier Transform (FFT) analysis of an SEM image can be employed to provide qualitiative and ultimately quantitative information regarding the SEM image quality.

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