Sand dripping in 1 dimensional Sand Pile Model is rst studied. Patterns and signals appear. Their behaviors and interactions are explained and asymptotic approximations are made. The total collapsing time of a single stack of sand is linear in function of the number of grains.

Understanding causal regularities in the world is a key feature of human cognition. However, the extent to which non-human animals are capable of causal understanding is not well understood. Here, we used the Aesop's fable paradigm--in which subjects drop stones into water to raise the water level and obtain an out of reach reward--to assess New Caledonian crows' causal understanding of water d...

The collaborate studies of clinical application of Extracorporeal Shock Wave Lithotripsy (ESWL) using Sonolith 2000, performed at Departments of Urology of Nara Medical University, the University of Tokai School of Medicine and Wakayama Medical College between March and August 1987, were reported. In total 155 ESWL sessions were carried out on 111 patients suffering from in total 119 upper urin...

chipped stones, like many other archaeological artifacts, change in their original context. one of the most important changes is breakage. although it is clear that chipped stones which are gathered by archaeologists might have been broken, there have been few discussions made on the estimating the original number of chipped stones before breaking. in this article we have introduced different m...

It is also profitable to wear about them gemmes and precious stones, as the The custom of wearing or holding an amulet during pregnancy and childbirth is probably as ancient as the need for comfort and reassurance. For reasons not entirely clear, precious and semi-precious stones throughout recorded time have been considered to possess protective virtues."'8 The medical benefits ascribed to eac...

OBJECTIVE The present study is an evaluation of cases of acute biliary pancreatitis that developed subsequent to cholecystectomy. METHODS Total of 44 patients were assessed in this retrospective study. Demographic characteristics, severity of illness, time elapsed between cholecystectomy and development of pancreatitis, whether endoscopic sphincterotomy (ES) was performed, surgical procedure ...

conclusions laparoscopic cholecystectomy is a safe and feasible technique to manage cholecystocutaneous fistulas. case presentation a 55-year-old male with comorbidities presented with a discharging sinus at the right upper quadrant area after an abdominal wall abscess drainage. a computerized tomography scan showed a biliary fistula. laparoscopic cholecystectomy was carried out successfully. i...

Non-erodible elements such as stones and vegetation are key to controlling wind erosion dust emission in drylands. Stony deserts widely distributed the Gobi Desert, but effect of on have not been well studied, except under artificial conditions. In this study, we evaluated by measuring sand saltation threshold a stony desert Tsogt-Ovoo Mongolia, natural surface conditions during storms. We quan...