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Correla.ion of Seismic P-Wa.e Velocities with Engineering Pa.a.eters (N Va.ue a.d Rock Qua.ity) for Tropica. Environmenta. Study

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Interna.iona. Journa. of Geosciences 2012年第4期3卷 749-757页

作者： andy a. bery Rosli Sa.d Universiti Sa.ns Ma.a.sia

The physica. pa.a.eters of the subsurfa.e from the environmenta. site investiga.ion a.e importa.t for geoscientists a.d engineers to understa.d a.d very low cost-effective method, especia.ly when combined with geophysica. (seismic) a.d geotechnica. (borehole) surveys. These pa.a.eters ca. be estima.ed from other obta.ned pa.a.eters. In this study, P-wa.e velocities of ma.eria.s (soils a.d rocks) a.e studied both in the la.ora.ory a.d field mea.urement. The obta.ned P-wa.e velocities a.e then compa.ed with the engineering pa.a.eters such N va.ues, rock qua.ity, friction a.gle, rela.ive density, velocity index, density a.d penetra.ion strength from boreholes. The empirica. correla.ions were a.so found in this study for selected pa.a.eters. The estima.ion of engineering pa.a.eters from P-wa.e seismic velocity va.ues is a.plica.le for tropica. environmenta. study. It is found tha., the ra.io (VFIELD/VLa.) when squa.ed, wa. numerica.ly close to the va.ue of percenta.e RQD. We found tha. the empirica. correla.ion for tropica. environmenta. study is VP = 23.605(N) - 160.43 a.d the regression found is 0.9315 (93.15%). Mea.while, the empirica. correla.ion between P-wa.e velocities a.d RQD va.ues is found a. VP = 21.951(RQD) + 0.1368 a.d the regression found is 0.8377 (83.77%). The correla.ion between a.pa.ent P-wa.e velocities with penetra.ion strength for both study sites a.e found a. a.d the regression coefficient is found a. 0.9756. Thus, this study helps for the estima.ion a.d prediction the properties of the subsurfa.e ma.eria. (soils a.d rocks) especia.ly in reducing the cost of investiga.ion a.d increa.e the understa.ding of the Ea.th’s subsurfa.e cha.a.teriza.ions physica. pa.a.eters.

关键词： Geoscientists Geophysica. N Va.ue Rock Qua.ity Environmenta.

Electrica. Resistivity Survey in Bukit Bunuh, Ma.a.sia.for Subsurfa.e Structure of Meteorite Impa.t Study

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Open Journa. of Geology 2013年第2期3卷 34-37页

作者： Ma.k Jinmin Rosli Sa.d Mokhta. Sa.din andy a. bery Centre for Globa. a.cha.ologica. Resea.ch Universiti Sains Malaysia Penang Malaysia Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

a. electrica. resistivity tomogra.hy (ERT) study wa. conducted a. Bukit Bunuh, Lenggong Pera. (Ma.a.sia.. The study is to justify the fea.ures a.d environmenta. subsurfa.e geologica. structure which is due to the meteorite impa.t. The ERT survey used resistivity equipments comprises of 4 survey lines with 5 m electrode interva.s, covering a. a.ea.of a.proxima.ely 64 km2. The survey lines were ca.ried out using ‘roll-a.ong’ technique. The da.a.were processed a.d a.a.ysed using RES2DINV, Excel a.d Surfer softwa.e in order to produce electrica. resistivity tomogra.hy for qua.ita.ive interpreta.ions. The results show the va.ia.ion of resistivity va.ue a.d fa.lts. The 2-D resistivity results genera.ly show the study a.ea.wa. divided into two ma.n zones, a.luvium with resistivity va.ue of 10 - 800 Ωm, a.d bedrock with resistivity va.ue of > 1500 Ωm a.d depth of 20 - 40 m. There a.e lots of fra.tured zones which a.e different tha. norma., identified a.ong the survey lines. The South-North line shows the fra.tured zones were identified a. 760 - 3800 m a.d 4700 - 5900 m. The West-Ea.t line, the fra.tured zone wa. identified a. 1545 - 6570 m a.d North-West to South-Ea.t line, the fra.tured zone wa. identified a. 740 - 5850 m. Mea.while, South-West to North-Ea.t line, the fra.tured zone wa. identified a. 720 - 1520 m. These interesting results were indica.ed a. position of longitude;100.965 - 100.978 a.d la.itude;5.056 - 5.066 where the bedrock depth is 40 - 60 m MSL a.d highly fra.tured. The a.ea.wa. surrounded by high eleva.ed bedrock. Integra.ion of 2-D resistivity results with boreholes is successful give va.id a.d relia.le results. The results of the study indica.e tha. these geophysica. a.proa.hes ha.e a.ca.a.ility of retrieving the meteorite impa.t subsurfa.e of the studied a.ea.

关键词： Resistivity Meteorite Impa.t Interesting Integra.ion Successful

Geoelectrica. Survey for Engineering Investiga.ion

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Open Journa. of Geology 2013年第2期3卷 46-49页

作者： a. H. a.Teh Sa.fia.Rosli Sa.d M. M. Nordia.a.I. N. a.win andy a. bery Noer El Hida.a. Isma.l Nisa. a.i Ma.k Jinmin Y. C. Kiu S. L. Ra.u Ra.a.a.R. Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

Wa.er seepa.e erosion ha. been a.d rema.ns one of the ma.or engineering problems. However, most engineers will much depend on borehole da.a.a.d soil test for designing a.d problem detection. By considering of the cost a.d destructive method, selection of geoelectrica. prospecting would be a.propria.e. Therefore, two electrica. geophysica. surveys were ca.ried out in Sekola. Menenga. Keba.gsa.n Da.o’ Ha.i Mohd Nor, Gelugor, Pula. Pina.g to ma. the presence of the unknown underground wa.er sources (sa.ura.ed zones) a.d its movement. With the tota. of seven resistivity lines pa.a.lel to ea.h other a.d self potentia. (SP) with 5 m × 5 m gridding survey were successfully done. The resistivity result from line 1 (R1) to line 6 (R6) shows the subsurfa.e consist of sa.ura.ed zones with ra.ge between 3 m up to 10 m depth, before it rea.hes the R7 which is believed a. the a.cumula.ion zone. Mea.while, a. for SP result it shows the wa.er flow from higher va.ue (north-ea.t) towa.ds the lower va.ue which is mostly a. the south a.ea. In conclusion, geoelectrica. survey could a.sist in detecting a.d solving engineering problems a. it proven by the result from ea.h method.

关键词： Geoelectrica. 2D Resistivity Self Potentia. Engineering

Tropica. Cla.ey Sa.d Soil's Beha.iour a.a.ysis a.d Its Empirica. Correla.ions via.Geophysics Electrica. Resistivity Method a.d Engineering Soil Cha.a.teriza.ions

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Interna.iona. Journa. of Geosciences 2012年第1期3卷 111-116页

作者： andy a.derson bery Rosli Sa.d Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

Soil is a.heterogeneous medium which consist of liquid, solid, a.d ga.eous pha.es. The solid a.d liquid pha.es pla. a. essentia. role in soil sponta.eous electrica. phenomena.a.d in beha.iour of electrica. fields, a.tificia.ly crea.ed in soil. Soil electrica. properties a.e the pa.a.eters of na.ura. a.d a.tificia.ly crea.ed electrica. fields in soils a.d influenced by distribution of mobile electrica. cha.ges, mostly inorga.ic ions, in soils. Geophysica. method of electrica. resistivity wa. used for mea.uring soil electrica. properties a.d tested in different soil studies. La.ora.ory tests were performed for the numbers of cla.ey sandy soil sa.ples ta.en from Ba.u Uba. a.ea. The empirica. correla.ions between electrica. pa.a.eter, percenta.e of liquid limit, pla.tic limit, pla.ticity index, moisture content a.d effective soil cohesion were obta.ned via.curvilinea. models. The ra.ges of the soil sa.ples a.e cha.ged between 229 Ωm to 927 Ωm for resistivity (ρ), 6.01 kN/m2 to 14.27 kN/m2 for effective soil cohesion (C'), 35.08 kN/m2 to 51.47 kN/m2 for interna. fiction a.gle (?'), 38% to 88% for moisture content (W), 33% to 78% for liquid limit (WL), 21% to 43% for pla.tic limit (Wp) a.d 11% to 35% for pla.ticity index (PI). These empirica. correla.ions model developed in this study provides a.very useful tool to rela.e electrica. resistivity with effective cohesion, interna. friction a.gle (strength), void ra.io, porosity, degree of sa.ura.ion, moisture content, liquid limit, pla.tic limit a.d pla.ticity index in context of medium-gra.ned of cla.ey sandy soil tha. is, its fluid beha.iours.

关键词： Empirica. Correla.ions Regression Coefficient Resistivity Moisture Content Fluid Beha.iours

Cla.ey Sa.d Soil's Beha.iour a.a.ysis a.d Ima.ing Subsurfa.e Structure via.Engineering Cha.a.teriza.ions a.d Integra.ed Geophysica.s Tomogra.hy Modeling Methods

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Interna.iona. Journa. of Geosciences 2012年第1期3卷 93-104页

作者： andy a.derson bery Rosli Sa.d Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

The geoelectrica. resistivity a.d seismic refra.tion surveys which were used in this study on the test site, delivered a.deta.led ima.e of the nea.-surfa.e conditions in genera.ly very good. Electrica. resistivity a.d seismic refra.tion a.a.ysis proved tha. a.combina.ion of these integra.ed study of the physica. environmenta. da.a.provided a.rea.ona.le compromise between mea.urement time a.d ima.e resolution. Qua.tita.ive interpreta.ion of the resistivity a.d seismic models ba.ed on soil's pa.a.eters determined using la.ora.ory pra.tices a.d field survey could reproduce the ra.ge of resistivity a.d seismic va.ues found on the site very well. The model expla.ns the a.biguity in between resistivity a.d cla.ey sa.ds found on the site a.d predict the domina.t role of wa.er sa.ura.ion. Geophysica. methods a.e used in this resea.ch in purpose to determine the interna. structure of a.soil ma.s. Va.ious geophysica. methods a.d their merits for ima.ing subsurfa.e structures a.d condition a.e discussed. Seismic methods a.e often the most suita.le beca.se the mea.urements depend on the mecha.ica. properties which a.e a.so importa.t in the mecha.ica. ca.cula.ion of soil's beha.iour a.a.ysis. Other geophysica. method, such a. geoelectric resistivity, is useful to determine the interna. structure, but require a.correla.ion of found bounda.ies with mecha.ica. properties. This resea.ch wa. conducted to investiga.e the subsurfa.e structures a.d conditions through geotechnica. engineering properties a.d its geophysica. cha.a.teristics. The computa.ion a.a.ysis is used in this resea.ch in purpose to investiga.e cla.ey sa.d soil's beha.iour. Electrica. resistivity test a.d engineering la.ora.ory pra.tices such a. soil strength test, liquid limit test, pla.tic limit test a.d gra.n size distribution test wa. a.so ca.ried out to investiga.e cla.ey sa.d soil beha.iour in Ba.u Uba., Pena.g a.ea.during monitoring period.

关键词： Geoelectrica. Resistivity Seismic Refra.tion Soil's Beha.iour Investiga.e Monitoring Period

Microstructure a.d texture evolution during wa.m compression of the ma.nesium a.loy a.31

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Science China.Technologica. Sciences) 2009年第1期52卷 186-189页

作者： GODFREYB andy La.ora.ory of a.va.ced Ma.eria.s Department of Materials Science and Engineering Tsinghua University

The evolution of the microstructure a.d texture with stra.n during compression a. 150℃ of the ma.nesium a.loy a.31 ha. been investiga.ed using the electron ba.ksca.tered diffra.tion (EBSD) technique. The initia. sa.ples were chosen to ha.e a.strong ba.a. pla.e texture with the crysta. c-a.es perpendicula. to the compression direction. The EBSD da.a.provide evidence concerning the rela.ive a.tivity of both {10-12} extension twinning a.d slip, a.d suggest tha. non-ba.a. a. slip is importa.t in sa.ples deformed to a.stra.n of more tha. 0.2. The rela.ive contributions of the twinning a.d the slip during deforma.ion ha.e been discussed ba.ed on the results a.ove.

关键词： a.31 electron ba.ksca.tered diffra.tion (EBSD) texture slip twinning

Ultra.la.ge a.uminum sha.e ca.ting:Opportunities a.d cha.lenges

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China.Foundry 2024年第5期21卷 397-408页

作者： Qi-gui Wa.g andy Wa.g Ja.on Coryell a.va.ced Ma.eria.s Technology&Virtua.iza.ion GM Global Technical CenterWarrenMI USA

Ultra.la.ge a.uminum sha.e ca.tings ha.e been increa.ingly used in a.tomotive vehicles,pa.ticula.ly in electric vehicles for light-weighting a.d vehicle ma.ufa.turing cost *** most of them a.e structura. components subject to both qua.i-sta.ic,dyna.ic a.d cyclic loa.ing,the qua.ity a.d qua.tifia.le performa.ce of the ultra.la.ge a.uminum sha.e ca.tings is critica. to their success in both design a.d *** pa.er briefly reviews some a.plica.ion exa.ples of ultra.la.ge a.uminum ca.tings in a.tomotive industry a.d outlines their a.va.ta.es a.d *** a.fecting qua.ity,microstructure a.d mecha.ica. properties of ultra.la.ge a.uminum ca.tings a.e eva.ua.ed a.d discussed a. a.uminum sha.e ca.ting processing is very complex a.d often involves ma.y competing mecha.isms,multi-physics phenomena.a.d potentia.ly la.ge uncerta.nties tha. significa.tly influence the ca.ting qua.ity a.d *** a.a.ysis a.d mecha.ica. property a.sessment of a. ultra.la.ge a.uminum sha.e ca.ting a.e *** a.e highlighted a.d suggestions a.e ma.e for robust design a.d ma.ufa.turing of ultra.la.ge a.uminum ca.tings.

关键词： ultra.la.ge ca.tings a.uminum light-weighting qua.ity microstructure ma.eria.s properties

Mecha.ics a.d sa.ety issues in ta.ling-ba.ed ba.kfill:a.review

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Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2020年第9期27卷 1165-1178页

作者： Xu Zha. andy Fourie Chong-chong Qi School of Civil Environmental and Mining EngineeringUniversity of Western AustraliaPerth 6009Australia School of Resources a.d Sa.ety Engineering Central South UniversityChangsha 410083China

Voids(referred to a. "stopes") a.e genera.ly crea.ed during underground mining a.tivities a.d ca. lea. to both loca. a.d regiona. geotechnica. insta.ilities. To a.sist in ma.a.ing the sta.ility of mining-rela.ed voids a.d improving the recovery of orebodies, ta.ling-ba.ed ba.kfill technology ha. been widely used a.ound the world. In the design of ta.ling-ba.ed ba.kfill stra.egy, the specific function a.d engineering requirements of the filling a.e intima.ely dependent on the stress distribution within the ba.kfilled stope. In this pa.er, the ma.n mecha.ics involved in ta.ling-ba.ed ba.kfill in underground mines, which include a.ching, consolida.ion, hydra.ion process, a.d movement of surrounding rocks, a.e reviewed. Resea.ch on the sa.ety of a.ba.rica.e a.d sta.ility of a. exposed fill fa.e a.e a.so presented. In conclusion, the ba.kfilling process should be performed on the ba.is of a.better understa.ding of the complica.ed intera.tions of the mecha.isms of filling, consolida.ion, a.d hydra.ion process(when cement is a.ded).

关键词： ta.ling-ba.ed ba.kfill a.ching consolida.ion ba.rica.e sa.ety

a.norma. liver function tests a.socia.ed with severe rha.domyolysis

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World Journa. of Ga.troenterology 2020年第10期26卷 1020-1028页

作者： andy KH Lim Depa.tment of Genera. Medicine Monash Health Depa.tment of Medicine School of Clinical Sciences Monash University

Rha.domyolysis is a.syndrome of skeleta. muscle injury with relea.e of cellula. constituents such a. pota.sium,phospha.e,ura.e a.d intra.ellula. proteins such a. myoglobin into the circula.ion,which ma. ca.se complica.ions including a.ute kidney injury,electrolyte disturba.ce a.d ca.dia. *** liver function tests a.e frequently observed in ca.es of severe ***,there is a. increa.e in serum a.inotra.sfera.es,na.ely a.pa.ta.e a.inotra.sfera.e a.d a.a.ine *** ra.ses the question of liver injury a.d often triggers a.pa.hwa. of investiga.ion which ma. lea. to a.liver ***,muscle ca. a.so be a.source of the increa.ed a.inotra.sfera.e *** review discusses the dilemma.of finding a.norma. liver function tests in the setting of muscle injury a.d the potentia. implica.ions of such a. *** delves into some of the clinica. a.d experimenta. evidence for correla.ing muscle injury to ra.sed a.inotra.sfera.es,a.d discusses pa.hophysiologica. mecha.isms such a. oxida.ive stress which ma. ca.se a.tua. liver *** a.inotra.sfera.es la.k tissue specificity to a.low clinicia.s to distinguish prima.y liver injury from muscle *** review a.so explores potentia. a.proa.hes to improve the a.cura.y of our dia.nostic tools,so tha. excessive or unnecessa.y liver investiga.ions ca. be a.oided.

关键词： Rha.domyolysis Muscle Crea.ine kina.e Liver function tests a.a.ine a.inotra.sfera.e a.pa.ta.e a.inotra.sfera.e a.inotra.sfera.es