1,142 research outputs found
Natural Resources Research Institute Technical Report
No full textPrepared for: Captain Micah David Faust-Allnutt, Highlander Sea, Inc./Acheson Ventures, 2336 Military St., Port Huron, MI 48060The Highlander is a 154 ft Grand Bank Topsail Schooner with a round wine glass bottom and full keel, overhanging transom design and Carvel wood planked construction. She was built in 1924 at the Yard of James and Tarr Shipwrights of Essex, Massachusetts.
The vessel’s design was created by Starling and Burgess. The Highlander sails with a fixed core complement of Master, Mate, Botswain and Cook and a sailing complement of cadets.Natural Resources Research Institute, University of Minnesota Duluth, 5013 Miller Trunk Highway, Duluth, MN 55811.Wang, Xiping; Wacker, James P. (2006). Condition Assessment of the Masts of Highlander Sea. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/200861
Supplement_Table_1126 - Association Between Lipid Profiles and Arterial Stiffness in Chinese Patients With Hypertension: Insights From the CSPPT
No full textSupplement_Table_1126 for Association Between Lipid Profiles and Arterial Stiffness in Chinese Patients With Hypertension: Insights From the CSPPT by Biming Zhan, Xiao Huang, Jiancheng Wang, Xianhui Qin, Jingping Zhang, Jingjing Cao, Yun Song, Lishun Liu, Ping Li, Renqiang Yang, Yanqing Wu, Qinghua Wu, Yan Zhang, Jianping Li, Yong Huo, Binyan Wang, Xiping Xu, Huihui Bao, and Xiaoshu Cheng in Angiology</p
Effect of Baicalin on inflammatory mediator levels and microcirculation disturbance in rats with severe acute pancreatitis
Full text linkObjective: To investigate the effect of Bacailin on inflammatory mediator levels and microcirculation disturbance in severe acute pancreatitis (SAP) rats and explore its therapeutic mechanism on this disease. Methods: SAP model rats were randomly divided into model control group and Baicalin treated group, 45 rats in each group. The same number of normal rats were included in sham-operated group. These groups were further subdivided into 3 h, 6 h and 12 h subgroups, respectively (15 rats in each subgroup). At 3, 6 and 12 hours after operation, rats were killed to conduct the following experiments: (1) to examine the mortality rates of rats, the ascites volume and pancreatic pathological changes in each group; (2) to determine the contents of amylase, PLA~2~, TXB~2~, PGE~2~, PAF and IL-1[beta]; in blood as well as the changes in blood viscosity.Results: (1) Compared to model control group, treatment with Baicalin is able to improve the pathological damage of the pancreas, lower the contents of amylase and multiple inflammatory mediators in blood, decrease the amount of ascitic fluid and reduce the mortality rates of SAP rats; (2) at 3 hours after operation, the low-shear whole blood viscosity in Baicalin treated group was significantly lower than that in model control group;at 12 hours after operation, both the high-shear and low-shear whole blood viscosity in Baicalin treated group were also significantly lower than those in model control group.Conclusion: Baicalin, as a new drug, has good prospects in the treatment of SAP since it can exert therapeutic effects on this disease through inhibiting the production of inflammatory mediators, lowering blood viscosity, improving microcirculation and mitigating the pathological damage of the pancreas
Natural Resources Research Institute Technical Report
No full textPrepared for: Carter Harvey Holt Ltd., Private Bag 92-106, Aukland, New ZealandThe purpose of this pilot study was to investigate the effect of freezing temperature on stress
wave measures of green ponderosa pine boards and to quantify the relationship between stress
wave speeds of green boards measured at room temperature and freezing temperature. This
study was conducted under a service agreement between the Natural Resources Research
Institute (NRRI) at the University of Minnesota Duluth and CHH Fibre-Gen Inc.Natural Resources Research Institute, University of Minnesota Duluth, 5013 Miller Trunk Highway, Duluth, Minnesota, 55811; Funded by: Carter Harvey Holt Ltd., Private Bag 92-106, Aukland, New ZealandWang, Xiping; Ross, Robert J. (2003). Effect of Freezing Temperature on Stress Wave Speed of Green Ponderosa Pine Boards. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/188573
Supplementary File.docx
No full text1. Huamin Zhou, Huan Li, Jingjing
Cao, Binyan Wang, Huiyuan Guo, Yun Song, Lishun Liu, Chengzhang Liu, Di Xie, Jing Nie, Ming Liang,
Xiaobin Wang, Yong Huo, Hao Zhang, Xiping Xu, and Xianhui Qin. Data from:
Plasma 25-hydroxyvitamin
D3 concentrations
and risk of new-onset proteinuria in hypertensive patients. Figshare. Deposited 21 January 2020</p
Natural Resources Research Institute Technical Report
No full textPrepared for: USDA Forest Products Laboratory, One Gifford Pinchot Drive, Madison, WI 53705Existing log grading procedures in the United States make only visual assessments of log quality.
These procedures do not incorporate estimates of the modulus of elasticity (MOE) oflogs. It is
questionable whether the visual grading procedures currently used for logs adequately assess the
potential quality of structural products manufactured from them, especially those in which MOE
is of primary concern.
The purpose of this study was to investigate the use of stress wave nondestructive evaluation
(NDE) techniques to sort red maple logs for the potential quality of lumber obtained from them.
Twenty red maple logs were nondestructively evaluated using longitudinal stress wave
techniques and sorted into four stress wave grades. The logs were then sawn into lumber.
Finally, the lumber specimens were dried and graded a final time using longitudinal stress wave
techniques. The results of this study showed that good relationships existed between stress wave
times measured in logs and the lumber produced from the logs. It was found that log stress wave
grades have a positive relationship with the lumber grades. Logs with high stress wave grades
produced high grade lumber. These findings indicate that the longitudinal stress wave technique
could be used in sawmills to sort logs/cants for the production of high MOE products.Natural Resources Research Institute, University of Minnesota, Duluth, 5013 Miller Trunk Highway, Duluth, Minnesota 55811Brashaw, Brian K; Wang, Xiping; Vatalaro, Robert J. (2001). Stress Wave Sorting of Red Maple Logs for Structural Quality. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/188566
Development of Flexural Vibration Inspection Techniques to Rapidly Assess the Structural Health of Rural Bridge Systems
No full textApproximately 4,000 vehicle bridges in the State of Minnesota contain structural timber members. Recent research at the University of Minnesota Duluth Natural Resources Research Institute (UMD NRRI) has been conducted on vibration testing of timber bridges as a means of developing rapid in-place testing techniques for assessing the structural health of bridges. The technique involves measuring the frequency characteristics of the bridge superstructure under forced flexural vibration. The peak frequency of vibration was measured and compared to a set of load testing data for each of 9 bridges. Each bridge was also inspected using commercially available advanced inspection equipment to identify any major structural problems with individual bridge components such as timber pilings, pile caps, and girders. Two bridges were identified that needed immediate maintenance attention. The relationship between the load deflection data and the vibration characteristics showed a useful relationship and the results indicate that forced-vibration methods have potential for quickly assessing timber bridge superstructure stiffness. However, improvements must be made to the measurement system to correctly identify the 1st bending mode frequency of the field bridges. This global vibration technique has potential benefits for routine inspections and long-term health monitoring of timber bridge superstructures.Brashaw, Brian K.; Vatalaro, Robert; Wang, Xiping; Sarvela, Kevin; Wacker, James P.. (2008). Development of Flexural Vibration Inspection Techniques to Rapidly Assess the Structural Health of Rural Bridge Systems. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/96712
Natural Resources Research Institute Technical Report
No full textPrepared for: Captain, U.S. Brig Niagara, Erie Maritime Museum, 150 East Front St., Erie，PA 16507The US Brig Niagara in Erie, Pennsylvania is a reconstruction of an early 19th century wooden warship of the United States Navy. One of six warships built to regain control of the upper Great Lakes from the British during the War of 1812, the hastily built Magara was Commodore Oliver Hazard Perry's relief flagship in the Battle of Lake Erie on September 1051813. In the battle, the entire British squadron of six warships was captured by Perry's nine ship squadron. This pivotal event in the war of 1812 secured the Northwest Territory, opened supply lines, and lifted the nation's moral. After the war, Niagara served as a station ship in Erie until she was scuttled in Presque Isle Bay in 1820. The wreck was raised and rebuilt in 1913 to commemorate the centennial of the battle and became part of the Erie Maritime Museum. Niagara was rebuilt again between 1933 and 1943 and placed ashore in downtown Erie. She underwent her third reconstruction, between 1988 and 1990, which enabled her to return to the water as an active Sailing ship. The testing results show no sign of decay on any of the cant frames and the knighthead tested. However, because the micro-drilling testing was very limited in the forepeak area, we can not conclude that all parts of the cant frames and the knighthead are free from decay.Natural Resources Research Institute, University of Minnesota Duluth, 5013 Miller Trunk Highway, Duluth, MN 55811Wang, Xiping; Wacker, James P. (2006). Condition Assessment of Main Structural members of the U.S. Brig Niagara. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/200862
Innovative Vietnamese Research on Mekong Deltaic Coastal Processes
No full textOver the last few decades, the Mekong Delta Coast has undergone many physical changes that have increased its vulnerability. Issues that have grown in importance are erosion, human occupation of coastal and estuarine mangroves, decreased sediment supply by the Mekong River and subsidence due to groundwater extraction. These issues have led to the loss of coastal and estuarine land and mangroves, increasing flood vulnerability and salinity intrusion. Recently, young and promising Vietnamese researchers have undertaken a number of in-depth studies to increase our understanding of the above issues. The objective of the present paper is to give a concise description of their work and place it into a broader context. The topics concerned are satellite mapping of coastal landuse changes, numerical simulation of the tide and wave climate and of coastal erosion, coastal and estuarine mangrove squeeze, wave and current damping in mangroves and wave transmission through bamboo fences. The main findings are that (1) coastal landuse has changed significantly over the last decades with the largest change due to conversion of mangroves to aquaculture and a modest change due to coastal erosion, (2) the understanding of the tide and wave climate and of the erosion has increased due to successful numerical modelling, (3) the role of mangrove squeeze along the coast and along the estuaries has been assessed, (4) the understanding of wave and current damping in mangroves and of wave transmission through bamboo fences has increased through the combined effort of laboratory and numerical modelling.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Coastal Engineerin
Low Frequency Vibration Approach to Assess the Performance of Wood Structural Systems
No full textThe primary means of inspecting buildings and other structures is to evaluate each structural
member individually. This is a time consuming process that is expensive, particularly if
sheathing or other covering materials must be removed to access the structural members. This
report presents an effort to use a low frequency vibration method for assessing the structural
performance of wood floor systems.Wang, Xiping; Ross, Robert J; Erickson, John R; Forsman, John W. (2003). Low Frequency Vibration Approach to Assess the Performance of Wood Structural Systems. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/256896
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