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The Dense Oceanfloor Network System for Earthquakes and Tsunamis (DONET) is a submarine cabled real‐time seafloor observatory network for precise earthquake and tsunami monitoring. Ten DONET observatories were in operation during the 2011 Tohoku‐Oki event near the Pacific coast of Honshu Island. Each observatory was equipped with an ocean bottom pressure gauge (PG) and a three‐component ocean bottom seismometer (OBS). A comparative analysis of the PG and OBS records revealed that shortly after seismic surface waves traversed the DONET region, free gravity waves were observed within the water layer. The period of these gravity waves was approximately 170 s, the peak‐to‐peak amplitude was approximately 3.5 cm, the length was on the order of 22 km, and the phase velocity was 134 m/s. We performed numerical simulations of the observed gravity waves using a combined 2D/3D numerical model. The ground motions required for the simulation were reconstructed from records provided by the DONET OBSs and the nearest ground‐based GPS stations. The synthetic bottom pressure variations are in good agreement with the DONET PG records. The synthetic displacements of the ocean surface throughout the simulation domain showed that the observed gravity waves were excited directly above the submarine slopes. Theoretical estimates and numerical experiments revealed the generation mechanism of the observed gravity waves. Plain Language Summary: During submarine earthquakes, the ocean floor shifts from its original position. Due to this displacement, a huge volume of water is moved, which can generate a destructive tsunami wave. However, earthquakes are accompanied not only by displacement of the ocean bottom in the epicentral area but also by the emission of seismic waves. These seismic waves are also capable of exciting waves in the ocean. For our study of this phenomenon, we used unique data from the Japanese Dense Oceanfloor Network System for Earthquakes and Tsunamis (DONET) observatories that were recorded during the Great East Japan Earthquake on 11 March 2011. Based on the records of the DONET seismometers, we reconstructed the movement of the bottom during the passage of a surface seismic wave. Then, using the obtained information, we simulated the movement of the water in the entire DONET area. The results of our simulation are in good agreement with the records of the DONET pressure gauges. The results also reveal that waves are only generated directly above steep submarine slopes during the passage of seismic waves. This study can help to identify tsunami wave signals in the records of bottom pressure gauges. Key Points: During the 2011 Tohoku event, seismic surface waves generated ocean surface gravity waves that were registered by the DONET observatoriesWe simulated the observed gravity waves using a combined 2D/3D numerical modelThe generation mechanism of the observed gravity waves was revealed based on theoretical estimates and numerical experiments [ABSTRACT FROM AUTHOR]

B Background: b A improved method of pancreatojejunostomy allowing to reduce the incidence of pancreatic fistula and associated severe postoperative complications. Fistula grade A - 5 cases, two patients - grade B and were not fistulas grade C. One patient died due to non-surgical complications. B Conclusion: b This method allows to make technical not difficult pancreatojejunostomy, which reduces the incidence of pancreatic fistula and associated with fistula postoperative complications. [Extracted from the article]