نتایج جستجو برای: radiofrequency spectrum

تعداد نتایج: 241794  

Journal: :Journal of Physics D 2021

Abstract The use of frequency selective surfaces (FSSs) defined on railcar windows with a metallic low-e coating to improve the reception mobile communications signals is becoming ever more common. proximity glass passenger in this scenario has introduced new parameter consider, aesthetics. This paper presents complete study development FSS by laser ablation, considering all current requirement...

Journal: :Anticancer research 2011
A Giorgio A Di Sarno G De Stefano U Scognamiglio N Farella A Mariniello V Esposito C Coppola V Giorgio

AIM To compare 5-year survival of patients with a single hepatocellular carcinoma≤3 cm randomly assigned to receive percutaneous ethanol injection or radiofrequency ablation. PATIENTS AND METHODS A total of 285 patients (192 males, mean age 70 years), with a single hepatocellular carcinoma (mean diameter 2.2 cm) were randomly assigned to receive percutaneous ethanol injection (n=143) or radio...

Journal: :iranian journal of radiation research 0
m. e. parsanezhad department of obstetrics and gynecology, school of medicine, shiraz university of medical sciences, shiraz, iran s. m. j. mortazavi ionizing and non-ionizing radiation protection research center (inirprc), shiraz university of medical sciences, shiraz, iran t. doohandeh department of obstetrics and gynecology, school of medicine, shiraz university of medical sciences, shiraz, iran b. namavar jahromi department of obstetrics and gynecology, school of medicine, shiraz university of medical sciences, shiraz, iran h. mozdarani department of medical genetics, faculty of medical sciences, tarbiat modares university, tehran, iran a. zarei ivf center, shiraz university of medical sciences, shiraz, iran

background: the health effect of rapidly increasing everyday exposure of humans to radiofrequency radiation is a major global concern. mobile phone jammers prevent the mobile phones from receiving signals from base stations by interfering with authorized mobile carriers’ services. in spite of the fact that mobile jammer use is illegal, they are occasionally used in offices, shrines, conference ...

Journal: :anesthesiology and pain medicine 0
bahram naderi nabi department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran abbas sedighinejad department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran mohammad haghighi department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran gelareh biazar department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran; department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran. tel: +98-1333329523, fax: +98-1313222021 masood hashemi department of anesthesiology, shahid beheshti university of medical sciences, tehran, iran soodabeh haddadi department of anesthesiology, anesthesiology research center, guilan university of medical sciences, rasht, iran

conclusions both tens and prf lumbar sympathectomy are promising pain relief treatments for painful dnp. however, prf lumbar sympathectomy seems to have a superior efficacy. further studies with a larger sample size and a longer follow-up period are needed. background painful diabetic peripheral neuropathy (dpn) is a long-term complication of type 1 and type 2 diabetes that majorly impacts qual...

Journal: :iranian red crescent medical journal 0
azar sattarinezhad department of endocrinology, namazi hospital, shiraz, ir iran alireza rasekhi department of radiology, namazi hospital, shiraz, ir iran mahmood soveid department of endocrinology, namazi hospital, shiraz, ir iran; department of endocrinology, namazi hospital, shiraz, ir iran. tel: +98-9173158915, fax: +98-7136474316

conclusions radiofrequency ablation may be used successfully in the treatment of parathyroid adenoma when a patient cannot tolerate surgery. case presentation a 47-year-old patient was referred to our hospital (namazi hospital, shiraz, iran) in april, 2015 with intracranial hemorrhage, as well as high serum calcium and pth (parathyroid hormone) levels (12.1 mg/dl and 1062 pg/ml, respectively), ...

Journal: :iranian journal of cancer prevention 0
mohammad houshyari department of radiation oncology, shohada hospital, shahid beheshti university of medical sciences, tehran, iran anya jafari department of radiation oncology, shohada hospital, shahid beheshti university of medical sciences, tehran, iran ahmad mostaar department of medical physics, faculty of medicine, shahid beheshti university of medical sciences, tehran, iran

physical agents such as ultraviolet or ionizing radiation and repetitive trauma have been related to the causation of cancer in humans. much less clear is the association between exposure to radiofrequency, such as radar and microwave radiation to the development of cancer. sporadic case reports and small series suggest that this type of radiation might lead to cancer or contribute to its evolu...

Journal: :iranian journal of science and technology (sciences) 2011
n. durna

there are many different ways to subdivide the spectrum of a bounded linear operator; some of them aremotivated by applications to physics (in particular, quantum mechanics). in this study, the relationship betweenthe subdivisions of spectrum which are not required to be disjoint and goldberg's classification are given.moreover, these subdivisions for some summability methods are studied.

Journal: :iranian journal of medical physics 0
a. montaseri m.sc. in medical physics, medical physics dept., tarbiat modarres university, tehran, iran. m. mokhtari-dizaji associate professor, medical physics dept., tarbiat modarres university, tehran, iran. sh. akhlaghpour assistant professor, radiology dept., tehran university of medical sciences, tehran, iran. m. r. alinaghizadeh m.sc. of medical physics, noor medical imaging center, tehran.

introduction: one of the minimally invasive methods of treatmenting liver malignancies is radiofrequency ablation (rfa) which can be applied to primary or secondary tumors. nevertheless, the disease recurrence is probable after rfa application partially due to the inadequate capability of temperature monitoring of the target tissue and visualizing the thermal damage. the goal of this work was t...

Journal: :iranian journal of radiology 0
mi-young kim departments of internal medicine, chonnam national university medical school, gwangju, korea jin woong kim departments of radiology, chonnam national university medical school, gwangju, korea dae-seong myung departments of internal medicine, chonnam national university medical school, gwangju, korea chung-hwan jun departments of internal medicine, chonnam national university medical school, gwangju, korea wan-sik lee departments of internal medicine, chonnam national university medical school, gwangju, korea yang jun kang departments of radiology, chonnam national university medical school, gwangju, korea

patients and methods this was a retrospective study including 207 consecutive patients who were enrolled using computerized hepatocellular carcinoma database consisting of 105 patients who underwent combined tace with rfa, and 102 patients who underwent tace alone with long-term follow-up. results the complete remission rate was meaningfully higher in the combination group (97.1%, 102/105) than...

Journal: :European heart journal 1999
G P Kimman N M van Hemel E R Jessurun P F van Dessel J C Kelder J J Defauw G M Guiraudon

AIMS Although arrhythmia surgery and radiofrequency catheter ablation to cure atrioventricular nodal reentrant tachycardia differ in technical concept, the late results of both methods, in terms of elimination of the arrhythmogenic substrate and procedure-related new and different arrhythmias, have never been compared. This constituted the purpose of this prospective follow-up study. METHODS ...

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