upstream blankets, drains and cutoff walls are considered as effective measures to reduce seepage, uplift pressure and exit gradient under the foundation of hydraulic structures. to investigate the effectiveness of these measures, individually or in accordance with others, a large number of experiments were carried out on a laboratory model. to extend the investigation for unlimited arrangement...

background: nowadays, extensive technological advancements have made it possible to use nanopaints which show exciting properties. in ir iran excessive radon levels (up to 3700 bq m–3) have been reported in homes located in radon prone areas. over the past decades, concerns have been raised about the risk posed by resi- dential radon exposure. objective: this study aims at investigating the eff...

abstract among activities that can be used to prevent piping phenomena and reduce seepage and exit gradient are installation of cutoff wall and drain under hydraulic structures. hence in this study, to investigating the influence of each mentioned parameter on uplift force and exit gradient a computer model has developed in which general equation of fluid flow into the isotropic and anisotropic...

introduction: this study aimed to compare the thickness of the mesiobuccal furcal canal walls of first and second maxillary molars. materials and methods: this study was performed on total of 30 first and second extracted molar teeth (15 each). the mesiobuccal roots of each tooth were separated at the cement-enamel junction (cej) level and embedded in acrylic resin. the embedded roots were cut ...

conclusions it seems serial clinical examinations are safe and decrease the cost and duration of hospitalization in stable patients with anterior abdominal wall stab wounds. results ninety-one men (91%) and 9 women (9%) with mean age of 27 ± 10.7 years were included. coexisting injuries were prevalent in 12 cases. the duration of hospitalization was 1 day in 31%, 2 days in 30%, 3 - 4 days in 32...

rhabdomyosarcoma encompasses a group of malignant myogenic neoplasms expressing a multitude of clinical and pathological diversities. it is the commonest soft tissue sarcoma of childhood but neonates are rarely affected. embryonal subtype is the most frequent. head-neck and genitourinary tracts are predominant sites, while trunk is considered among the unusual sites of rhabdomyosarcoma. herein ...

purpose : to report an unusual case of dermoid cyst of the frontal bone case report : we report a case of 28-year-old man with a history of painless progressive proptosis of the left eye. ct-scan was showed a hypodense lesion that mainly located within the frontal bone with only a small intraorbital involvement. excisional biopsy was performed and histopathologic examination was compatible with...

results: among 11 patients who underwent surgery consisted of eight males and three females. their metastasis originated from testis tumors (n = 5), renal cell carcinoma (rcc; n = 4), bladder tumor (n = 1), and prostate cancer (n = 1). their mean age was 41.27 years (range, 21-67). the mean age of the patients with rcc and testis tumor at the time of diagnosing metastasis was 54 and 24.8 years,...

It has long been understood that food deliveries may act as signals of future food location, and not only as strengtheners of prefood responding as the law of effect suggests. Recent research has taken this idea further--the main effect of food deliveries, or other "reinforcers", may be signaling rather than strengthening. The present experiment investigated the ability of food deliveries to si...

in the past, rock slope stability analysis were performed either graphically or using a hand-held calculator, but nowadays there are variety of slope stability analysis which can be used according to the field condition and potential failure mode. in 2-d analysis, effect of convex and concave walls are neglected, however concave slopes are believed to be more stable than straight walls due to t...