722 research outputs found
Evaluation of strong ground motion at Imagawa, Urayasu City, during the 2011 off the Pacific coast of Tohoku Earthquake
No full textAbstractSerious damage due to ground liquefaction occurred in Urayasu City, located in the coastal area around Tokyo Bay, during to the 2011 off the Pacific coast of Tohoku Earthquake (Mw 9.0). In particular, extensive liquefaction was observed in the Imagawa District of Urayasu City. In order to investigate the mechanism of damage and to establish appropriate countermeasures, it is very important to evaluate the strong ground motion in the Imagawa District. For this purpose, aftershock observations and microtremor measurements were carried out in and around the Imagawa District. Then, site effects in the Imagawa District were evaluated based on the microtremor H/V spectral ratios and the aftershock records
Polychlorinated -Naphthalenes, -Biphenyls, -Dibenzo-p-dioxins and -Dibenzofurans in Bluefin Tuna, Swordfish, Cormorants and Barn Swallows from Italy
No full textConcentrations of p,p'-DDE, polychlorinated biphenyl congeners (PCBs), polychlorinated-dibenzo-p-dioxins (PCDDs), -dibenzofurans (PCDFs) and -naphthalenes (PCNs) were measured in bluefin tuna, swordfish, common cormorants, and barn swallows collected from Italy. Average concentrations of PCBs in livers of tuna, swordfish, cormorant, and swallows were 930, 745, 1420 and 1230 ng PCBs g(-1), w.w. respectively. p,p'-DDE was found in tuna, swordfish, cormorant, and swallow livers at mean concentrations of 82, 135, 166 and 95 ng DDE g(-1) w.w. respectively. PCNs were found in all the samples analyzed, although at concentrations less than those reported for biota from the Baltic Sea. PCBs, particularly, non-ortho coplanar PCBs accounted for 80-90% of the total TEQs in tuna and swordfish. Relative contribution of PCDDs/DFs to TEQs was greater in cormorants and swallows compared to that in fishes. PCDD/DF congeners accounted for up to 80 and 45% of the total TEQs in cormorants and swallows, respectively
Impact tolerance of thermoplastic and thermoset epoxy carbon textile composites
No full textRecently, a thermoplastic epoxy resin (TP-EP) was developed with both advantages of thermoset and thermoplastic resins. The TP-EP has the good workability of TS and the formability and recyclability of TP. The present study aims to assess the impact tolerance of the TP-EP carbon textile composite (CFRTP) compared to the thermoset epoxy resin (TS-EP) counterpart. Drop weight impact test, with a hemispherical striker tip were performed for different molecular weight (Mw) of the TP-EP matrix. An impact energy of 30J was selected for comparison. The impact damage extension was visualized by a thermal-camera and by laser microscope measurements. The residual mechanical strength after impact was measured by compression tests. The highly polymerized CFRTP had higher maximum impact force, lower energy absorbed ratio, lower residual dent and smaller damaged surface, meaning a better impact tolerance
Polychloronaphthalenes and other dioxin-like compounds in Arctic and Antarctic marine food webs
No full textHere we report accumulation patterns of polychlorinated naphthalenes (PCNs), polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), polychlorinated biphenyls (PCBs), and pesticides (HCB, p,p′DDE) in polar organisms (polar bear from Alaskan Arctic and krill, sharp-spined notothen, crocodile icefish, Antarctic silverfish, Adélie penguin, South polar skua, and Weddell seal from the Ross Sea, Antarctica). PCNs, found in most of the samples, ranged from 1.5 pg/g in krill to 2550 pg/g in South polar skua on a wet weight basis. Lower chlorinated PCNs were the predominant congeners in organisms except skua and polar bear that showed similar PCN homologue patterns. PCDD/F concentrations were <90 pg/g wet wt in polar organisms; PCDD congeners showed peculiar accumulation patterns in different organisms. Correlation existed between PCN and PCB concentrations. PCB, HCB, and p,p′DDE levels were the highest in skua liver (11150 ng/g wet wt, 345 ng/g wet wt, and 300 ng/g wet wt, respectively). Contribution of PCNs to 2,3,7,8-tetrachlrodibenzo-p-dioxin equivalents (TEQ) was negligible (<0.1%) because of the lack of most toxic congeners. The highest TEQ was found in South polar skua liver (45 pg/g, wet weight). This is the first study to document the occurrence of PCNs in Antarctic organisms. High levels of dioxin-like chemicals in skua suggest the importance of intake via diet and migration habits, thus POP detection can be useful to trace migration behavior. Moreover, POP concentrations in penguin and skua eggs prove their transfer from the mother to eggs
Reduced expression of collagen type IX in human osteoarthritic chondrocytes is associated with epigenetic silencing by DNA hypermethylation
No full textsj-docx-1-jdr-10.1177_00220345231181539 – Supplemental material for Endothelial Insulin Resistance Exacerbates Experimental Periodontitis
No full textSupplemental material, sj-docx-1-jdr-10.1177_00220345231181539 for Endothelial Insulin Resistance Exacerbates Experimental Periodontitis by T. Zeze, T. Shinjo, K. Sato, Y. Nishimura, M. Imagawa, S. Chen, A.-k. Ahmed, M. Iwashita, A. Yamashita, T. Fukuda, T. Sanui, K. Park, G.L. King and F. Nishimura in Journal of Dental Research</p
Polychlorinated naphtalenes (PCNs) and Polychlorinated biphenyls (PCBs) in marine species including polar bear and Weddell seals from polar regions.
No full textMeasurement-Integrated simulations and Kalman filter applied to a co-flowing jet
No full textThis paper deals with the experimental evaluation of a flow analysis system based on the integration between an under-resolved Navier-Stokes simulation and experimental measurements with the mechanism of feedback (referred to as Measurement-Integrated simulation), applied to the case of a planar turbulent co-flowing jet. The experiments are performed with inner-to-outer-jet velocity ratio around 2 and the Reynolds number based on the inner-jet heights about 10000. The measurement system is a high-speed PIV, which provides time-resolved data of the flow-field, on a field of view which extends to 20 jet heights downstream the jet outlet. The experimental data can thus be used both for providing the feedback data for the simulations and for validation of the MI-simulations over a wide region. The effect of reduced data-rate and spatial extent of the feedback (i.e. measurements are not available at each simulation time-step or discretization point) was investigated. At first simulations were run with full information in order to obtain an upper limit of the MI-simulations performance. The results show the potential of this methodology of reproducing first and second order statistics of the turbulent flow with good accuracy. Then, to deal with the reduced data different feedback strategies were tested. It was found that for small data-rate reduction the results are basically equivalent to the case of full-information feedback but as the feedback data-rate is reduced further the error increases and tend to be localized in regions of high turbulent activity. Moreover, it is found that the spatial distribution of the error looks qualitatively different for different feedback strategies. Feedback gain distributions calculated by optimal control theory are presented and proposed as a mean to make it possible to perform MI-simulations based on localized measurements only. So far, we have not been able to low error between measurements and simulations by using these gain distributions
Polychlorinated-Naphthalenes, -Biphenyls, Dibenzo-p-dioxins in Tuna, Swordfish, Cormorants and Swallows from Italy
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