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Exploring E Turkey: Rainfall Precursor Predicts 100% Earthquake in a Consistent Manner in Just 2 Weeks

International Journal of Geosciences 2013年第4期4卷 759-765页

作者： Prakash Pillai sqs institute of ndt Super Quality Services Tiruchi Tamilnadu India

Rainfall event is the very specific, reliable unambiguous precursor for the earthquake event. Over the years scientists have hunted for some signal—a precursory sign, however faint—that would allow forecasters to pin-point exactly where and when the big ones will hit. After decades spent searching in vain, many seismologists now doubt whether such a signal even exists. But in a great surprise to everyone, from an ordinary lay man to eminent scientists, 100% earthquakes occur after rainfalls! Though I have the findings for the entire regions of the world, here E Turkey are the region for submission for the period Jan-November, 2012 to study the strong correlation and show the strong evidence to prove that the 100% earthquakes after rainfall in a consistence manner. Anyone can very easily verify the validity of the findings for any forthcoming earthquakes for any regions of E Turkey in just two weeks of period. Nature does not give two different results for the same phenomena, for two different observers. Though there exists a very strong relation between the rainfalls and the earthquakes, scientists and seismologists have not been able to detect and identify this rainfall precursory signal for hundreds of years that consistently occurs before earthquakes. The methodology of rainfall event before earthquakes, even works consistently for earthquake prediction purpose, especially in any regions of the world. Rainfall type precursor is the best approach to predict specific earthquakes, which provide the potential for estimating the epicenter and magnitude of any moderate to strong earthquakes. Earthquakes are more likely when there is rain than it is not. The magnitudes of a resulting individual earthquake depend on the severity of the weather changes. However, in a very few cases the time scales and magnitude do vary substantially as a consequence of local site geology and other factors.

关键词： Earthquake Prediction Earthquake Precursor Rainfall Predicts Earthquakes Weather Predicts Earthquakes

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Rheological behavior of semi-solid TiB_2 reinforced Al composite

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Transactions of Nonferrous Metals Society of China 2015年第9期25卷 2827-2832页

作者： S.THADELA B.MANDAL P.DAS H.ROY A.K.LOHAR S.K.SAMANTA Near Net Shape Manufacturing Technology Group CSIR-Central Mechanical Engineering Research Institute ndt & Metallurgy Group CSIR-Central Mechanical Engineering Research Institute

The rheological behavior of the semi-solid Ti B2 reinforced Al-Mg alloy composite slurry was investigated,which is required for the mould filling simulations during the semi-solid *** B2 reinforced in-situ Al-Mg alloy composite samples were remelted and subsequently brought to the semi-solid temperature regime within the heating chamber of a Searle type *** order to understand the rheological behavior of composites,three different types of experiment were carried out,namely,steady state test,continuous cooling test and isothermal *** from that,the thixotropic nature of the slurry was confirmed from the obtained hysteresis loops during the *** results indicate that when isothermally held,the composite slurry exhibits pseudo-plasticity and shows shear-thinning behavior up to the shear rate of 1300 s^-1,and at higher shear rates（1300 s^-1）,it shows a shear thickening tendency,which is probably due to the agglomeration of non-deformable nano-Ti B2 *** pseudo-plastic behavior of the slurry was also estimated employing intermittent step changes of shear rate（shear jump test）.

关键词： rheology shear thinning in-situ nano-Ti B2 thixotropy shear thickening

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Effect of TiB2 and Al3Ti on the microstructure,mechanical properties and fracture behaviour of near eutectic Al−12.6Si alloy

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International Journal of Minerals,Metallurgy and Materials 2021年第7期28卷 1174-1185页

作者： Surajit Basak Prosanta Biswas Surajit Patra Himadri Roy Manas Kumar Mondal Department of Metallurgical and Materials Engineering National Institute of TechnologyDurgapurDurgapur-713209West BengalIndia Department of ndt and Metallurgy Group CSIR-Central Mechanical Engineering Research InstituteDurgapur-713209West BengalIndia

A near eutectic Al−12.6Si alloy was developed with 0.0wt%,2.0wt%,4.0wt%,and 6.0wt%Al−5Ti−1B master *** micro-structural morphology,hardness,tensile strength,elongation,and fracture behaviour of the alloys were *** unmodified Al−12.6Si al-loy has an irregular needle and plate-like eutectic silicon(ESi)and coarse polygonal primary silicon(PSi)particles in the matrix-likeα-Al *** P_(Si),E_(Si),andα-Al morphology and volume fraction were changed due to the addition of the Al−5Ti−1B master *** hardness,UTS,and elongation improved due to the microstructural ***-sized in-situ Al3Ti particles and ex-situ TiB_(2)particles caused the mi-crostructural *** fracture images of the developed alloys exhibit a ductile and brittle mode of fracture at the same *** Al−5Ti−1B modified alloys have a more ductile mode of fracture and more dimples compared to the unmodified alloy.

关键词： Al−Si alloy Al−5Ti−1B modification modification mechanism mechanical properties fracture analysis

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Remote structural health monitoring with serially multiplexed fiber optic acoustic emission sensors

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Earthquake Engineering and Engineering Vibration 2003年第1期2卷 141-146页

作者：陈仲裕梁玉进 Farhad Ansari Shanghai institute for Optics & Fine Mechanics.Shanghai 201800 China Visiting Scholar Civil & Materials Engineering Smart Sensors & NDT LaboratoryUniversity of Illinois at ChicagoChicagoIL 60607 Graduate Research Assistant Civil & Materials Engineering Smart Sensors & NDT LaboratoryUniversity of Illinois at ChicagoChicagoIL 60607 Professor & Head

Development and testing of a serially multiplexed fiber optic sensor system is *** sensor differs from conventional fiber optic acoustic systems,as it is capable of sensing AE emissions at several points along the length of a single *** provides for single channel detection of cracks and their locations in large structural systems. An algorithm was developed for signal recognition and tagging of the AE waveforms for detection of' crack locations,Labora- tory experiments on plain concrete beams and post-tensioned FRP tendons were pcrlormed to evaluate the crack detection capability of the sensor *** acoustic emission sensor was able to detect initiation,growth and location of the cracks in concrete as well as in the FRP *** AE system is potentially suitable lot applications involving health monitoring of structures following an earthquake.

关键词： acoustic emission crack detection concrete earthquake fiber optic sensors FRP tendon multiplexing post seismic structural health monitoring

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Enhanced ultrasonic total focusing imaging of CFRP corner with ray theory-based homogenization technique

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Chinese Journal of Aeronautics 2023年第1期36卷 434-443页

作者： Zhongbing LUO Jinli KANG Huanqing CAO Li LIN ndt&E Laboratory Dalian University of TechnologyDalian 116024China Shenzhen Key Laboratory of Smart Sensing and Intelligent Systems Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Ultrasonic testing is effective in defect characterization and quality assurance of Carbon Fiber Reinforced Plastic(CFRP) components in the aerospace industry. Due to the coupling between complex shape and elastic anisotropy, the Phased Array Ultrasonic Testing(PAUT) and time-based Total Focusing Method(TFM) face significant challenges in the calculation of wave propagation. A wave velocity distribution model is established for a multidirectional convex corner of CFRP based on a homogenization theory and the above coupling effects are also incorporated. A ray-tracing method is proposed based on Dijkstra’s shortest path search algorithm. The predicted time of flight ensures that this technique, the homogenized TFM, could synthesize a high-quality focused image by post-processing on the full matrix capture data. Experiments on a laminate with three φ1.5 mm Side-Drilled Holes(SDHs) in different circumferential directions confirm a successful homogenized TFM imaging that all SDHs can be effectively detected. As compared to the isotropic scenario, the maximum positioning error is reduced to 0.12, 0.08, and 0.38 mm, and the Signal-to-Noise Ratios(SNRs) are increased by 2.1, 1.1, and 11.8 dB, respectively. It is suggested that the ray-tracing assisted TFM technique can effectively improve the imaging of corners in CFRP components.

关键词： Carbon fiber reinforced plastic Complex shape Homogenization Imaging Time of Flight(TOF)

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Hypersingular integral-partial differential equations for a planar interface crack in bimaterial

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Chinese Science Bulletin 1996年第14期41卷 1225-1228页

作者：乐金朝汤任基 Center for Pavement ndt and CAE Zhengzhou Institute of Technology Zhengzhou 450002 China Department of Engineering Mechanics Shanghai Jiaotong Univeristy Shanghai 200030 China

With the rapidly increasing use of composite materials, a great deal of interest in the interface crack has been generated among the technicians, metal physicists and materials scientists. To the authors’ knowledge, many researches on this subject have been taken. However, they are usually applied to two-dimensional cases. For the three-dimensional ones, very few analyses have been done because of the great complexity on mathematics and mechanics. In this study, based on the point-force solutions for two perfectly

关键词： hypersingular integral-partial diflerential equations planar interface crack halfspaces.

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Caution to Apply Magnetic Barkhausen Noise Method to Nondestructive Evaluation of Plastic Deformation in Some Ferromagnetic Materials

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Chinese Journal of Mechanical Engineering 2019年第6期32卷 85-91页

作者： Manru He Takanori Matsumoto Tetsuya Uchimoto Toshiyuki Takagi Hongen Chen Shejuan Xie Zhenmao Chen Shannxi Engineering Research Center for ndt and Structural Integrity Evaluation State Key Laboratory for Strength and Vibration of Mechanical StructuresSchool of AerospaceXi’an Jiaotong UniversityXi’an 710049China institute of Fluid Science Tohoku UniversitySendai 980‑8577Japan

Magnetic Barkhausen Noise(MBN) method is known as an effective nondestructive evaluation(NDE) method for evaluation of residual stress in ferromagnetic materials. Some studies on the feasibility of the MBN method for NDE of residual strains were also conducted and found applicable. However, these studies are mainly focused on the state of residual strains which were introduced through a one-cycle-loading process. In practice, however, structures may suffer from an unpredictable and complicated loading history, i.e., the final state of plastic strain may be induced by several times of large loads. Whether the loading history has influences on MBN signals or not is of great importance for the practical application of the MBN method. In this paper, several ferromagnetic specimens with the same final state of residual strain but of different loading history were fabricated and inspected by using a MBN testing system. The experimental results reveal that the loading history has a significant influence on the detected MBN signals especially for a residual strain in range less than 1%, which doubts the feasibility to apply the MBN method simply in the practical environment. In addition, micro-observations on the magnetic domain structures of the plastic damaged specimens were also carried out to clarify the influence mechanism of loading history on the MBN signals.

关键词： Plastic damage Deformation history MBN method Ferromagnetic materials

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Parametric study on contact sensors for MASW measurement-based interfacial debonding detection for SCCS

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 331-344页

作者： Chen Hongbing Pang Xin Gan Shiyu Li Yuanyuan Gokarna Chalise Nie Xin Research institute of Urbanization and Urban Safety School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijing 100083China Department of Civil Engineering Tsinghua UniversityBeijing 100084China Faculty of Infrastructure Engineering Dalian University of TechnologyDalian 116081China

Steel-concrete composite structures(SCCS)have been widely used as primary load-bearing components in large-scale civil *** the basis of the co-working ability of steel plate and concrete,the bonding status plays an essential role in guaranteeing the structural performance of ***,efficient non-destructive testing(ndt)on interfacial debondings in SCCS has become a prominent research ***-channel analysis of surface waves(MASW)has been validated as an effective ndt technique for interfacial debonding detection for ***,the feasibility of MASW must be validated using experimental *** study establishes a high-frequency data synchronous acquisition system with 32 channels to perform comparative verification experiments in ***,the current sensing approaches for high-frequency vibration and stress waves are ***,three types of contact sensors,namely,piezoelectric lead-zirconate-titanate(PZT)patches,accelerometers,and ultrasonic transducers,are selected for MASW ***,the selection and optimization of the force hammer head are *** experiments are carried out for the optimal selection of ultrasonic transducers,PZT patches,and accelerometers for MASW *** addition,the influence of different pasting methods on the output signal of the sensor array is *** results indicate that optimized PZT patches,acceleration sensors,and ultrasonic transducers can provide efficient data acquisition for MASW-based non-destructive *** research findings in this study lay a solid foundation for analyzing the recognition accuracy of contact MASW measurement using different sensor arrays.

关键词： steel-concrete composite structures(SCCS) interface debonding detection multi-channel analysis of surface waves(MASW) sensor selection comparative experimental study

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Comparative Human Landing Catch and CDC Light Trap in Mosquito Sampling in Knowlesi Malaria Endemic Areas in Peninsula Malaysia

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Advances in Entomology 2016年第1期4卷 1-10页

作者： Ahmad Rohani Abd Rahman Aidil Azahary Mohamed Nor Zurainee Wan Mohd Ali Wan Najdah Ismail Zamree Mohd Omar Hanif Mohd Majid Ariffin Hamid Zuhaizam Ismail Suzilah Han Lim Lee Medical Entomology Unit Institute for Medical Research Kuala Lumpur Malaysia Department of Parasitology University of Malaya Kuala Lumpur Malaysia School of Quantitative Sciences (sqs) UUM College of Arts and Sciences University Utara Malaysia Sintok Malaysia

Adult mosquito sampling techniques are essential for monitoring transmission of malaria and other mosquito borne infections. Preference for any sampling technique depends on both its field efficiency and the characteristics of local vector populations. Surveys on adult mosquitoes using Human Landing Catch (HLC) and CO2-baited CDC light trap (CDC-LT) techniques were conducted in several knowlesi malaria endemic areas between the months of March to December 2012 in several states of Peninsula Malaysia. These two techniques were relatively compared to determine the preferences of anopheline mosquitoes towards CO2-baited CDC-LT technique using HLC technique as the reference method. Cx. gelidus, An. maculates and An. introlatus were the main three species collected by HLC technique, whereas the species collected by CO2-baited CDC-LT technique were mostly An. cracens, Ar. durhami and Coquillettidia species. Most of the Anopheles species were collected almost exclusively by the human collectors except for An. cracens and An. introlatus which were collected using both techniques. Anopheles cracens was the most dominant species captured using CO2-baited CDC-LT technique. This is the first report showing An. cracens was caught using CO2-baited CDC-LT technique in Malaysia.

关键词： Anopheles cracens Human Landing Catch CDC Light Trap

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Relating estimates of wood properties of birch to stem form, age and species

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Journal of Forestry Research 2024年第3期35卷 1-11页

作者： Grace Jones Maria Ulan Mateusz Liziniewicz Johan Lindeberg Stergios Adamopoulos Teagasc Forestry Development Department Ashtown Research CentreDublin 15 D15DY05Ireland Research institutes of Sweden(RISE) GoteborgSweden The Forest Research institute of Sweden(Skogforsk) Ekebo 225026890SvalovSweden Department of Forestry and Wood Technology Linnaeus University35195VaxjoSweden Department of Forest Biomaterials and Technology Swedish University of Agricultural SciencesBox 700875007 UppsalaSweden

Birch has long suffered from a lack of active forest management,leading many researchers to use mate-rial without a detailed management *** collected from three birch(Betula pendula Roth,*** Ehrh.)sites in southern Sweden were analyzed using regression analysis to detect any trends or differences in wood proper-ties that could be explained by stand history,tree age and stem *** sites were genetics trials established in the same *** of acoustic velocity(AV)from non-destructive testing(ndt)and predicted AV had a higher correlation if data was pooled across sites and other stem form factors were considered.A subsample of stems had radial profiles of X-ray wood density and ring width by year created,and wood density was related to ring number from the pith and ring *** seemed likely that wood density was negatively related to ring width for both birch *** models had slight improvements if site and species were included,but only the youngest site with trees at age 15 had both birch *** paper indicated that ndt values need to be considered separately,and any predictive models will likely be improved if they are specific to the site and birch species measured.

关键词： Acoustic velocity Non-destructive testing Predictive models Regression analysis Wood density

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