The new techniques in seismic design of structures are usually attributed to high damping ratios. In such systems, the assumption of classical (i.e. proportional) damping is not valid and in most cases they should be considered as Non-classical systems. Since the analytical tools for studying the behavior of such structures are not easily available, the present work attempts to find the limits,...

in order to determine aqueous extract effects of cool-season turfgrass mixture clipping on germination and seedling growth of four weed species, laboratory and outdoor pot experiments were done at the experimental laboratory and greenhouse of the doroud parks and landscape organization, located in doroud, lorestan, iran. the first factor was the concentration of sport turfgrass clipping extract...

abstract distal pancreatectomy has been a standard technique for pancreatic body and tail lesions for years ago. recently, it is being performed laparoscopically in a perfect manner. there are two common methods for this procedure. one is distal pancreatectomy with splenectomy and the other is distal pancreatectomy with spleen preservation. in patients with splenic vessels involvement, it is no...

the effects of different factors on growth and bio-oxidation efficiency of a native strain of acidithiobacillus ferrooxidans have been evaluated by the utilization of response surface methodology, rsm. medium ph and iron concentration were found to be the most significant factors while temperature and ammonia concentrations had the least weight within the ranges investigated. optimum operationa...

abstract background: evaluation of breast masses in women under 40 years old starts with a triple test score (tts) which is composed of clinical breast examination, mammography and fine needle aspiration. increased breast density in this age group decreases the sensitivity of mammography. so deciding whether to biopsy such nondiagnostic lesions or not is subject to challenge. breast masses up t...

prediction of the onset of menstruation (menarche age) using height, weight and body mass index (bmi) is a major health procedure. the present study was conducted to determine the relationship between anthropometric indices and menarche age in 488 girls 11-17 years in southern iran (kish island) in 2011.data was collected using questionnaires as well as measurements of the children's height and...

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  Chloroma or granulocytic sarcoma (GS) is a malignant neoplasm of myeloid lineage that occur in a variety of anatomic sites other than the bone marrow including soft tissue, bone, lymph node, nasal fossa, skin and sometime in the orbit. In the subconjunctiva it is rarely reported. A 4-year-old girl with a history of treated acute myelogenous leukemia was referred to Farabi Eye Hospital, Tehra...

abdominal masses in neonatal period is one of the main causes of patients bed ridden in infantal surgery wards. the rapid encounterance with these patients has caused a decrease in mortality and morbidity. this study is a kind of historical research which has been conducted on data base management systems of two above mentioned hospitals between years 1361-1378. the final outcome was only 25 ca...