Development of AI-based Prediction and Assessment Program for Tunnelling Impact

유충식,SYED AIZAZ HAIDER2,양재원,TABISH ALI 한국지반신소재학회 2019 한국지반신소재학회 논문집 Vol.18 No.4

In this paper the development and implementation of an artificial intelligence (AI)-based Tunnelling Impact prediction and assessment program (SKKU-iTunnel) is presented. Program predicts tunnelling induced surface settlement and groundwater drawdown by utilizing well trained ANNs and uses these predicted values to perform the damage assessment likely to occur in nearby structures and pipelines/utilities for a given tunnel problem. Generalised artificial neural networks (ANNs) were trained, to predict the induced parameters, through databases generated by combining real field data and numerical analysis for cases that represented real field conditions. It is shown that program equipped with carefully trained ANN can predict tunnel impact assessments and perform damage assessments quiet efficiently and comparable accuracy to that of numerical analysis. This paper describes the idea and implementation details of the SKKU-iTunnel with an example for demonstration.

Prediction of overall survival and progression-free survival for glioblastoma multiforme treated with a moderately escalated radiation dose - Amalgamating ensembled approach into automated machine learning

Ali Haider Bangash,Ali Haider Shah 대한종양외과학회 2022 대한임상종양학회 학술대회지 Vol.2022 No.2

Experimental Pathogenesis of Pullorum Disease with the Local Isolate of Salmonella enterica serovar. enterica subspecies Pullorum in Pullets in Bangladesh

Haider, M.G.,Chowdhury, E.H.,Khan, M.A.H.N.A.,Hossain, M.T.,Rahman, M.S.,Song, H.J.,Hossain, M.M. The Korean Society of Poultry Science 2009 韓國家禽學會誌 Vol.35 No.4

이 실험은 추백리의 병원성을 연구하고자 2006년 2월부터 12월까지 Salmonella enterica serovar. enterica subspecies (S.) Pullorum 야외주를 분리한 후, 이를 건강한 닭에 실험적으로 감염시킨 다음 임상증상, 여러 기관의 육안 및 조직병리학적 검색과 아울러 공격주의 재분리와 동정을 시도하였다. S. Pullorum에 혈청학적으로 음성인 12주령의 100수의 암탉을 $A{\sim}E$까지 20수씩 5그룹으로 구분하였다. $A{\sim}DS$. Pullorum을 $10^6\;CFU$, $10^7\;CFU$, $2{\times}10^7\;CFU$, $10^8\;CFU$로 각각 경구 감염시켰고, E는 비감염 대조군으로 삼았다. 실험 방법으로는 부검, 조직병리학적 검사, Salmonella에 대한 세균 배양, 염색, 생화학적 특성을 조사하고 그 결과를 기술하였다. The research work was carried out to study the pathogenesis covering the clinical signs, gross and histopathological lesions in different organs, and reisolation and identification of the organisms after experimental infection with the local isolate of Salmonella enterica serovar. enterica subspecies (S.) Pullorum at different time interval of the experiment during the period February 2006 to December 2006. One hundred pullets (seronegative to S. Pullorum of 12 weeks age were purchased and divided into 5 (A, B, C, D and E) groups and each group consisted of 20 birds. Four groups (A, B, C and D) were infected orally with a dose of $10^6\;CFU$, $10^7\;CFU$, $2{\times}10^7\;CFU$, $10^8\;CFU$ of S. Pullorum, respectively, and one group (E) was treated as uninfected control. The used methods were necropsy and histopathology, culture of bacteria, staining and biochemical test of Salmonella. Five birds from each group were randomly selected and sacrificed $1^{st}$ week, $2^{nd}$, $3^{rd}$ and $4^{th}$ weeks of post infection (PI). From all the groups, the bacteriological samples (crop, liver, lung, heart, spleen, bile duodenum, ceca and blood) were collected with pre enriched in buffered peptone water in sterile poly bags. Liver, lungs, heart, spleen, intestine, etc. were collected in 10% buffered-formalin for histopathological examination. No clinical signs, gross and histopathological lesions were found in control group and no S. Pullorum was reisolated. Clinical sign of experimentally infected with S. Pullorum in pullets were loss of appetite (100%), slight depression (75%), ruffled feathers (85%), diarrhea (60%) and loss of weight (100%) in chickens. The feed intake and body weight at different weeks after PI differed significantly (p<0.01) among the groups. Grossly, the highest recorded lesion was button-like ulcer in the ceca (80%) and the lowest was white nodules in lungs (1.25%). S. Pullorum were reisolated from crop (91.25%), liver (91.25%), lung (83.75%), heart (71.25%), spleen (87.75%), bile (33.25%), duodenum (92.50%), ceca (97.50%) and from different group of infection (61.25%). The highest microscopic findings were intestinal and cecal mucosa and submucosa exhibited infiltration of mononuclear cells and congestion (96.25%), and the lowest finding was nodule formation in the lungs (3.75%). The pattern of the disease production by local isolate of S. Pullorum in Bangladesh is almost similar with other isolates in different countries.

Using Magnetic Resonance Myelography to Improve Interobserver Agreement in the Evaluation of Lumbar Spinal Canal Stenosis and Root Compression

Haider Najim Al-Tameemi,Sattar Al-Essawi,Mahmud Shukri,Farah Kasim Naji 대한척추외과학회 2017 Asian Spine Journal Vol.11 No.2

Study Design: Cross-sectional retrospective study designed to assess interobserver agreement. Purpose: To investigate if interobserver agreement using magnetic resonance imaging (MRI) in the evaluation of lumbar spinal canal stenosis and root compression can be improved upon combination with magnetic resonance myelography (MRM). Overview of Literature: The interpretation of lumbar spinal MRI, which is the imaging modality of choice, often has a significant influence on the diagnosis and treatment of low back pain. However, using MRI alone, substantial interobserver variability has been reported in the evaluation of lumbar spinal canal stenosis and nerve root compression. Methods: Hardcopies of 30 lumbar spinal MRI (containing a total of 150 disk levels) as well as MRM films were separately reviewed by two radiologists and a neurosurgeon. At each intervertebral disk, the observers were asked to evaluate the thecal sac for the presence and degree of spinal stenoses (mild, moderate, or severe) and presence of root canal compression. Interobserver agreement was measured using weighted kappa statistics. Results: Regarding lumbar spinal canal stenosis, interobserver agreement between the two radiologists was moderate (kappa, 0.4) for MRI and good (kappa, 0.6) for combination with MRM. However, the agreement between the radiologist and neurosurgeon remained fair for MRI alone or in combination with MRM (kappa, 0.38 and 033, respectively). In the evaluation of nerve root compression, interobserver agreement between the radiologists improved from moderate (kappa, 0.57) for MRI to good (kappa, 0.73) after combination with MRM; moderate agreement between the radiologist and neurosurgeon was noted for both MRI alone and after combination with MRM (kappa, 0.58 and 0.56, respectively). Conclusions: Interobserver agreement in the evaluation of lumbar spinal canal stenosis and root compression between the radiologists improved when MRM was combined with MRI, relative to MRI alone.

System Dynamic Modelling of Three Different Wind Turbine Gearbox Designs under Transient Loading Conditions

Haider Al-Hamadani,Taylan An,Matthew King,Hui Long 한국정밀공학회 2017 International Journal of Precision Engineering and Vol.18 No.11

Wind turbine (WT) drivetrain design configurations affect dynamic loads experienced by the drivetrain components under different operational conditions. This paper presents system modelling of dynamic loads experienced by key mechanical components within WT gearbox under different operational conditions by using MATLAB/Simulink. Two operational conditions of WTs are considered; normal operation and shutdown, using torque spectrums measured from a field operating wind turbine. The torsional dynamic loads under these conditions differ significantly; during normal operation, the maximum torque ratio is below the recommend value however it exceeds the recommended level during shutdown. It has been found that the shutdown event has a considerable effect on gear loading; it causes occurrences of loading reversal of gear meshing forces. Moreover, the variation range of meshing forces between planetary and sun gears is five to six times higher than that during normal operation. During shutdown, the most dominated vibration frequency of the WT drivetrains is the lowest one which is very close to the estimated natural frequency of the low speed shaft and that may cause the resonance of the drivetrain system.

Radiolabelled Monoclonal Antibodies (McAb): An Alternate Approach to the Conventional Methods for the Assessment of Cardiomyocyte Damage in an Experimental Brain-Death Pig Model

Haider, Kh.H.,Stimson, W.H. The Pharmaceutical Society of Korea 1998 Archives of Pharmacal Research Vol.21 No.5

The present study was carried out to determine the possible use of cTn-I in the cardiac myofibrillar architecture, as a potential target for in vivo radioimmunodetection of cardiac damage in a brain death pig model. Radioiodiantion of the anti-cTn-I 5F4 McAb was carried out by lactoperoxidase method. the percentage iodine incorporation achieved was 70-75%. The radioiodinated McAbs were purified on Sephadex G-25 column and characterised by Paper chromatography, Phast Gel electrophoresis and electroimmunoblotting. Radioiodinated anticTn-I 5F4 McAbs were employed alongside Pyrophosphate($Tc_{99m}$-PPi$) and $Thallium^{201}$ chloride($TI^{201}$) in 24 landrace pigs (brain-dead=18 & sham-operated=6). The percentage cardiac uptake of the radiolabelled antibody injected dose was significantly higher in the brain dead animals(0.196%) as compared to that of sham-operated animals (0.11%). Specific in vivo localization of radiolabelled McAbs in the infarcted cardiac tissue was confirmed by computer-aided reconstruction of 3-D images of the isolated heart. The preliminary results of the study revealed preferential uptake of radiolabelled antibody at the site of myocyte damage resulting from artificially induced brain death.

Simulation study of biomethane liquefaction followed by biogas upgrading using an imidazolium-based cationic ionic liquid

Haider, Junaid,Qyyum, Muhammad Abdul,Kazmi, Bilal,Zahoor, Muhammad,Lee, Moonyong ELSEVIER 2019 Journal of Cleaner Production Vol. No.

<P><B>Abstract</B></P> <P>To satisfy the ever-increasing global energy demand, biomethane is considered a promising sustainable and renewable energy source. Biomethane can be transported either in the gaseous phase (through pipelines, over a small distance) or in the liquid phase (through shipping, over a long distance). For transportation over long distances, liquefaction is one of the most economic and feasible approaches so far. However, biomethane is obtained as a result of biogas upgrading, i.e., CO<SUB>2</SUB> removal from biogas. Conventionally, CO<SUB>2</SUB> is removed through amine-based absorption, which consumes large amounts of energy to regenerate the amine-based solvent. Liquefaction of methane (obtained either from fossil-based or renewable resources) has also been recognized as an energy-intensive process. Hence, the major issue associated with biogas upgrading and subsequent biomethane liquefaction is their high energy consumption, which ultimately affords a cost-intensive process. In this context, we propose a simulation based an economical and energy efficient process for biomethane liquefaction following biogas upgrading using an ionic liquid (1-butyl–3–methylimidazolium hexafluoro phosphate [Bmim][PF<SUB>6</SUB>]). As such, biogas can be upgraded at an energy expense of 1.1048 kWh/kmol, while 11.26 kWh/kmol of energy is used for biomethane liquefaction. The specific total annualized cost for the proposed integrated process was calculated as $519.3/kg-biogas.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An integrated process is developed to upgrade and liquefy the biogas. </LI> <LI> Biogas upgrading leads to biomethane with 99 wt% purity adopting [Bmim][PF<SUB>6</SUB>]. </LI> <LI> The upgraded biomethane is liquefied through nitrogen-methane expander process. </LI> <LI> Total annualized cost of biogas upgrading to liquefaction is $311.6 × 10<SUP>5</SUP>. </LI> <LI> Specific total annualized cost for integrated process is $519.3/kg-biogas. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Aminated polyethersulfone-silver nanoparticles (AgNPs-APES) composite membranes with controlled silver ion release for antibacterial and water treatment applications

Haider, M.S.,Shao, G.N.,Imran, S.M.,Park, S.S.,Abbas, N.,Tahir, M.S.,Hussain, M.,Bae, W.,Kim, H.T. Elsevier 2016 Materials Science and Engineering C Vol.62 No.-

<P>The present study reports the antibacterial disinfection properties of a series of silver nanoparticle (AgNP) immobilized membranes. Initially, polyethersulfone (PES) was functionalized through the introduction of amino groups to form aminated polyethersulfone (NH2-PES, APES). AgNPs were then coordinately immobilized on the surface of the APES composite membrane to form AgNPs-APES. The properties of the obtained membrane were examined by FT-IR, XPS, XRD, TGA, ICP-OES and SEM-EDAX analyses. These structural characterizations revealed that AgNPs ranging from 5 to 40 nm were immobilized on the surface of the polymer membrane. Antibacterial tests of the samples showed that the AgNPs-APES exhibited higher activity than the AgNPs-PES un-functionalized membrane. Generally, the AgNPs-APES 1 cm x 3 cm strip revealed a four times longer life than the un-functionalized AgNPs polymer membranes. The evaluation of the Ag+ leaching properties of the obtained samples indicated that approximately 30% of the AgNPs could be retained, even after 12 days of operation. Further analysis indicated that silver ion release can be sustained for approximately 25 days. The present study provides a systematic and novel approach to synthesize water treatment membranes with controlled and improved silver (Ag+) release to enhance the lifetime of the membranes. (C) 2016 Elsevier B.V. All rights reserved.</P>

Economic Evaluation with Sensitivity Analysis For Hydrogen Production Via Solar Powered Alkaline Water Electrolyzer And Battery Energy Storage System

( Haider Niaz ),유준,홍성수 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-

Renewable energies have an increasing demand throughout the region due to the fact of increase in greenhouse emissions and depleting natural resources. In this perspective, renewable hydrogen has been recognized as a promising future energy carrier. Although several methods have been and are being developed for the production of hydrogen from renewable energy sources, the only state-of-the-art technique is alkaline water electrolysis. In this study, a comparative techno-economic study for solar photovoltaic (PV) powered AWE, with and without BESS, is conducted to evaluate the levelized cost of hydrogen (LCOH). One-point sensitivity analysis was performed to observe the effect of parameters towards cost. Estimated variation in the raw material price and economic parameter variables highlighted the efficacy of the BESS and AWE hybrid design to ensure a continuous hydrogen production operation at a relatively lower cost.

Sequential repetitive chemical reduction technique to study size-property relationships of graphene attached Ag nanoparticle

( Haider Muhammad Salman ),김희택,( Shao Godlisten Namwel ),박성수,( Nadir Abbas ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0

A sequential repetitive chemical reduction technique to observe the growth of silver nanoparticles (AgNPs) attached to rGO, was performed on a single solution of graphene oxide (GO) and silver nitrate solution (7 runs, R1-R7) in order to manipulate the growth and size of the AgNPs. AgNPs with diameter varying from 4 nm in first run (R1) to 50 nm in seventh run (R7) can be obtained using this technique. Antibacterial activities of the samples were carried out on the Gram negative bacteria (E. coli). It was suggested that the sample obtained in the third run (R3) exhibited the highest antibacterial activity as compared to other samples, toward disinfection of bacteria due to its superior properties. This study provides a unique and novel application route to synthesize and control size of AgNPs embedded on graphene for various applications.