background: assessment of uterine abnormalities is a core part in infertility evaluation. objective: the aim of this study was to evaluate the sensitivity and specificity of three-dimensional hysterosonography (3-dhs) in the diagnosis of uterine abnormalities in infertile women. materials and methods: the infertile women who visited royan institute and referred to 3-dhs consecutively, prior to ...

circularly-polarized antenna is built based on new siw(substrate integrated waveguide)structure which contains cavity-backed resonator and a conventional polarized ring with twosquare slits in inner and outer ring that differ 90° at position and is proposed for right-handedcircular polarization (rhcp) and fabricated in two separate layers. a broadband impedancebandwidth of 13.9% and a rhcp axia...

myeloid sarcoma (ms) is a tumor mass consisting of myeloblast with or without maturation occurring at an anatomical site other than the bone marrow. incidence of ms ranges from 1-9% and is most commonly misdiagnosed as non hodgkins lymphoma or poorly differentiated carcinoma. ms can occur in various sites but nasal cavity involvement is rare. here we report acaseof ms presenting as nasal polyp ...

a digital look-up table adaptive predistortion technique using a six-port receiver for power amplifier linearization is presented. the system is designed in ka-band for a dvb-s2 satellite link. we use a six-port receiver at the linearizationloop in place of classic heterodyne receivers. the six-port receiver is implemented by the use of passive microwavecircuits and detector diodes. this approa...

Introduction Conventional metallic conductors carrying electronic signals between integrated circuits are susceptible to electromagnetic coupling which can result in parasitic capacit~~ce, inductance, and noise pickup. Consequently, overall system performance suffers, especially at high bit rates. Signals transmitted photor.ically are immune to these effects, which accounts for ~~ch of the curr...

One of the instruments for determination of position used in several applications is the Global Positioning System (GPS). With a cheap GPS receiver, we can easily find the approximate position of an object. Accuracy estimation depends on some parameters such as dilution of precision, atmospheric error, receiver noise, and multipath. In this study, position accuracy with GPS receiver is classifi...