Renal cell carcinoma (RCC) metastasis to duodenum is very rare and only a few case reports are available in the literature. We here reported a patient with solitary duodenal metastasis presented with melena six years after right nephrectomy. The patient underwent upper gastrointestinal endoscopy showing ulcerative mass at the second portion of duodenum and biopsy of this mass was consistent wit...

In the present study, carbon species including organic carbon (OC), elemental carbon (EC), and water-soluble organic carbon (WSOC) concentration in PM2.5 were assessed at an urban site of Tehran, Iran during March to June 2014. The PM2.5 samples were collected using an frmOMNITM Ambient Air Sampler. Thermal gravimetric analysis (TGA) was used to analyze OC and EC. The results showed that PM2.5 ...

A long-term measured wind speed time series from the location is typically used when deciding on placing a small turbine at particular location. These data take long to collect. The presented novel method of measuring for shorter time, using measurement training an experimental model, and predicting in longer period enables one avoid most wait collection. As model inputs, available signals that...

The most commonly used form of Internet presence for a company is its official web site. Business web sites have been used since the beginning of Internet development in its early stages. As the Web space has been changing over time in quality, quantity and capabilities, so have its business web sites as well. It is a known fact that web site quality varies as well as its usability and function...

aim and background: the aim of this study was to examine the quality curriculum of the department of clinical psychology of tehran university medical science.  methods and materials: it is a descriptive case study and the sampling comprises ma, phd students and attending professors of the department of clinical psychology tehran university of medical sciences in the academic year of 2010-2011 e...

background: learning of clinical skills in the intensive care unit (icu) is important for nursing students. “direct observation of procedural skills (dops)” is a modified objective method in the field of medical sciences, and we conducted this study with the aim of investigating the effect of evaluation using dops method on learning practical skills among nursing students in the icu. materials ...

ABSTRACT- A real-time, site-specific, machine-vision based, inter-row patch herbicide application system was developed and evaluated. The image resolution was 640 × 480 pixels covering a total area of 350 mm x 240 mm of a field composed of four quadrants of 350 mm x 60 mm each. The image frames were processed by LabView® and MatLab®. The developed algorithm, based on weed coverage ratio and seg...