Development of the Sea Color Surface Spectral Radiometer

AbstractThis paper describes the design, calibration, and deployment of a sea color surface spectral radiometer that accurately measures downward visible wave (solar) irradiance and leave-water radiance. It is diffused on a moving platform, such as a ship on the sea for in situ measurements. The sea color surface spectral radiometer has two channels, one Self-Scanning Photodiode Array(SSPD), and its response wavelength is from 450nm to 800nm. As the instrument can detect two indispensable parameters––water-leaving upward spectral radiance and downward irradiance, we can compute remote sensing reflectance. It can provide sufficient irradiant data to meet the need of scientific study, promising it a bright application prospect. From the calibration and experiment results of the spectral radiometer, we can see the spectral radiometer is fairly accurate and the results satisfactory

China Offshore Data Translation Net and Information Integration and Release Platform

AbstractChina offshore marine observation station of Chinese academy of sciences consists of dozens of marine observation buoy system, which are spread in China's offshore to obtain the long-term continuous oceanographic elements. In order to get the real-time understanding of marine dynamic change information, the observed data need to be translated back on time to the terrestrial laboratory and the scientists can analyze them. By the communication way of general packet radio service(GPRS), code division multiple access(CDMA) and “Beidou” satellite, a large range of data transmission network of covering China offshore area is formed and the real-time observation data and the buoy state information is transmitted to ground-based data station. In ground-based station, the data received software is compiled and installed, which make the data are received and displayed. In addition, in order to better use the data, original database is needed and the primary data products are formed. At the same time network information release, establish data sharing mechanism. It is mature database software, established the real-time database and delay database, they have abundant data query function, but were established based on the Internet data information release and communication system, to scientists and government decision makers, fishery breeding personnel and the public users provide different levels of data information products for its service, and provide an exchange platform

Development of highly magnetostrictive composites for applications in magnetomechanical torque sensors

The objective of this work was to investigate and develop a magnetomechanical material with high magnetomechanical response and low hysteresis. This material will be used in electronic torque sensors for advanced steering systems in automobiles which will replace the costly and fuel inefficient hydraulic steering systems currently in use. Magnetostruction and the magnetomechanical effect under torsional stress of magnetostrictive composites have been investigated in the present study

Inferior mesenteric vein serves as an alternative guide for transection of the pancreatic body during pancreaticoduodenectomy with concomitant vascular resection: a comparative study evaluating perioperative outcomes

BACKGROUND: Tumors of the pancreatic head often involve the superior mesenteric and portal veins. The purpose of this study was to assess perioperative outcomes after pancreaticoduodenectomy (PD) with concomitant vascular resection using the inferior mesenteric vein (IMV) as a guide for transection of the pancreatic body (Whipple at IMV, WATIMV). METHODS: One hundred thirty-seven patients had segmental vein resection during PD between January 2006 and June 2013. Depending on whether the standard approach of creating a tunnel anterior to the mesenterico-portal vein (MPV) axis was achieved for pancreatic transection, patients were subjected to a standard PD with vein resection procedure (s-PD + VR, n = 75) or a modified procedure (m-PD + VR, n = 62). Within the m-PD + VR group, 28 patients underwent the WATIMV procedure, while 34 patients underwent the usual procedure of transection, or ‘central pancreatectomy’ (c-PD + VR). RESULTS: The volume of intraoperative blood loss and the blood transfusion requirements were significantly greater, and the venous wall invasion and neural invasion frequency were significantly higher in the m-PD + VR group compared with the s-PD + VR group. There were no significant differences in the length of hospitalization, postoperative morbidity, and grades of complications between the two groups. Multivariate logistic regression identified intraoperative blood transfusion (P = 0.004) and vascular invasion (P = 0.008) as the predictors of postoperative morbidity. Further stratification of the entire cohort of 62 (45%) patients who underwent m-PD + VR showed a higher rate of negative resection margins (96.4%) in the WATIMV group compared with the c-PD + VR group (76.5%) (P = 0.06). The volume of intraoperative blood loss (P = 0.013), and intraoperative blood transfusion requirements (P = 0.07) were significantly greater in the c-PD + VR group compared with the WATIMV group. Furthermore, high intraoperative blood loss and tumor stage were predictive of a positive resection margin. CONCLUSIONS: ‘Whipple at the IMV (WATIMV)’ has comparable postoperative morbidity with standard PD + VR. If IMV runs into the splenic vein, it could serve as an alternative guide for transection of the pancreatic body during PD + VR