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Lin, W.,Byrne, T.B.,Kinoshita, M.,McNeill, L.C.,Chang, C.,Lewis, J.C.,Yamamoto, Y.,Saffer, D.M.,Casey Moore, J.,Wu, H.Y.,Tsuji, T.,Yamada, Y.,Conin, M.,Saito, S.,Ito, T.,Tobin, H.J.,Kimura, G.,Kanagaw Elsevier Scientific Publishing Co 2016 Tectonophysics Vol.692 No.2
<P>To better understand the distribution of three dimensional stress states in the Nankai subduction zone, southwest Japan, we review various stress-related investigations carried out in the first and second stage expeditions of the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) by the Integrated Ocean Drilling Program (IODP) and compile the stress data. Overall, the maximum principal stress sigma(l) in the shallower levels (<similar to 1 km) is vertical from near the center of forearc basin to near the trench and; the maximum horizontal stress S-Hmax (interpreted to be the intermediate principal stress sigma(2)) is generally parallel to the plate convergence vector. The exception to this generalization occurs along the shelf edge of the Nankai margin where S-Hmax, is along strike rather than parallel to the plate convergence vector. Reorientation of the principal stresses at deeper levels (e.g., >similar to 1 km below seafloor or in underlying accretionary prism) with sigma(1) becoming horizontal is also suggested at all deeper drilling sites. We also make a comparison of the stress state in the hanging wall of the frontal plate-interface between Site C0066 in the Nankai and Site C0019 in the Japan Trench subduction zone drilled after the 2011 Mw 9.0 Tohoku-Oki earthquake. In the Japan Trench, a comparison between stress state before and after the 2011 mega-earthquake shows that the stress changed from compression before the earthquake to extension after the earthquake. As a result of the comparison between the Nankai Trough and Japan Trench, a similar current stress state with trench parallel extension was recognized at both C0006 and C0019 sites. Hypothetically, this may indicate that in Nankai Trough it is still in an early stage of the interseismic cycle of a great earthquake which occurs on the decollement and propagates to the toe (around site C0006). (C) 2015 Elsevier B.V. All rights reserved.</P>
Temperature-induced changes in morphology and structure of TiO2–Al2O3 fibers
J.S. Tobin,A.J. Turinske,N. Stojilovic,A.F. Lotus,G.G. Chase 한국물리학회 2012 Current Applied Physics Vol.12 No.3
Electrospinning of a sol-gel and polymer mixture is used to produce titania-alumina (TiO2-Al2O3) fibers with diameters ranging from 200 to 800 nm. These composite metal-oxide fibers were calcined at various temperatures and their morphology is studied using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The decrease in the average diameter of the fibers with increasing temperature is observed. Powder X-ray diffraction (XRD) reveals that up to 800 ℃ the composite fibers have anatase titania structure whereas at 900 ℃ the fibers exhibit mixture of anatase and rutile phases. It is found that specific surface area decreases as a function of temperature in the 700-900 ℃ range. The change in phase (anatase-to-rutile) and the increase in crystallite size occur simultaneously. The presence of smaller amount of amorphous alumina in the primarily titania-based structure seems to play the role in stabilizing the anatase phase.
Tobin, John J.,Bergin, Edwin A.,Hartmann, Lee,Lee, Jeong-Eun,Maret, Sé,bastien,Myers, Phillip C.,Looney, Leslie W.,Chiang, Hsin-Fang,Friesen, Rachel IOP Publishing 2013 The Astrophysical journal Vol.765 No.1
<P>We present a study on the spatial distribution of N2D+ and N2H+ in 13 protostellar systems. Eight of thirteen objects observed with the IRAM 30 m telescope show relative offsets between the peak N2D+ (J = 2 -> 1) and N2H+ (J = 1 -> 0) emission. We highlight the case of L1157 using interferometric observations from the Submillimeter Array and Plateau de Bure Interferometer of the N2D+ (J = 3 -> 2) and N2H+ (J = 1 -> 0) transitions, respectively. Depletion of N2D+ in L1157 is clearly observed inside a radius of similar to 2000 AU (7 '') and the N2H+ emission is resolved into two peaks at radii of similar to 1000 AU (3 ''.5), inside the depletion region of N2D+. Chemical models predict a depletion zone in N2D+ and N2H+ due to destruction of H2D+ at T similar to 20 K and the evaporation of CO off dust grains at the same temperature. However, the abundance offsets of 1000 AU between the two species are not reproduced by chemical models, including a model that follows the infall of the protostellar envelope. The average abundance ratios of N2D+ to N2H+ have been shown to decrease as protostars evolve by Emprechtinger et al., but this is the first time depletion zones of N2D+ have been spatially resolved. We suggest that the difference in depletion zone radii for N2H+ and N2D+ is caused by either the CO evaporation temperature being above 20 K or an H-2 ortho-to-para ratio gradient in the inner envelope.</P>
Health and Environment in Canada
Mcmullen, Duane,Tobin, N.Previsich,R.S. 대한위생학회 1992 International Conference on Environmental Health-T Vol.1 No.1
The link between human health and the environment is of great interest to Canadians. Opinion polls reveal that human health is the primary reason people are concerned about environmental pollution. Of secondary concern are the effects of pollution on air, water, forests, fish and wildlife. As a reflection of this concern, Canadians have requested that more information be made available on the nature and extent to which their health is being affected by the environment. In an effort to respond to this request, Health and Welfare Canada has undertaken the production of a publication entitled: $quot;A Vital Link- Health and the Environment in Canada$quot;. This publication is a synthesis of information that describes the relationship between human health arid the environment. Where possible, it shows trends or indicators of health status by utilizing graphs and illustrations. Federal government studies were the primary source of both human and environmental information. Some of the topics in the document are: How are we exposed?, How are we affected?, What are the hazards?, Emerging Issues and, What Can be Done? The content and the development of the document will be described and an description of the Federal Government's Green Plan will be provided. A key part of the Green Plan, the Action Plan on Health and the Environment will be highlighted.
A modest outburst and emission structure of very young protostar HOPS 373
Sung-Yong Yoon,Gregory J. Herczeg,Jeong-Eun Lee,Ho-Gyu Lee,Doug Johnstone,Watson Varricatt,John J. Tobin,Carlos Contreras Peña,Steve Mairs,Klaus Hodapp,P. Manoj,Mayra Osorio,S. Thomas Megeath,the JCM 한국천문학회 2022 天文學會報 Vol.47 No.2