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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.
Backstepping Sliding Mode Controller Design for a Flying Quadrotor
Haider A. F. Mohamed,H. M. A. A. Al-Assadi,M. Moghavvemi,S. S. Yang 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper presents the design of a backstepping sliding mode controller for a quadrotor vertical take-off and landing (VTOL) unmanned air vehicle. This controller sets the quadrotor to fly to the desired three space positions (x, y, z) while controlling its yaw angle. In addition, the controller is designed to stabilize the pitch and roll angles. To ensure stability of the overall system, the backstepping controller is designed based on the Lyapunov stability theory. Various simulations of the model show that the control law stabilizes the quadrotor with good tracking. To verify the performance of the proposed backstepping controller, simulations using SIMULINK has been carried out. The simulation results show good performances.
Fusarium mangiferae as New Cell Factories for Producing Silver Nanoparticles
( Haider M. Hamzah ),( Reyam F. Salah ),( Mohammed N. Maroof ) 한국미생물생명공학회(구 한국산업미생물학회) 2018 Journal of microbiology and biotechnology Vol.28 No.10
Finding a safe and broad-spectrum medication is a goal of scientists, pharmacists, and physicians, but developing and fabricating the right medicine can be challenging. The current study describes the formation of silver nanoparticles (AgNPs) by Fusarium mangiferae. It involves the antibiofilm activity of the nanoparticles against Staphylococcus aureus. It also involves cytotoxic effect against mammalian cell lines. Well-dispersed nanoparticles are formed by F. mangiferae. The sizes of the nanoparticles were found to range from 25 to 52 nm, and UV-Vis scan showed absorption around 416-420 nm. SEM, TEM, and AFM results displayed spherical and oval shapes. Furthermore, the FTIR histogram detected amide I and amide II compounds responsible for the stability of AgNPs in an aqueous solution. AgNPs were observed to decrease the formation of biofilm at 75% (v/v). DNA reducing, smearing, and perhaps fragmentation were noticed after treating the bacterial cells with 50% (v/v). Additionally, cell lysis was detected releasing proteins in the supernatant. It was also observed that the AgNPs have the ability to cause 59% cervical cancer cell line (HeLa) deaths at 25% (v/v), however, they showed about 31% toxicity against rat embryo fibroblast transformed cell lines (REF). The results of this study prove the efficiency of AgNPs as an antibiofilm against S. aureus, suggesting that AgNPs could be an alternative to antibiotics. It must also be emphasized that AgNPs displayed cytotoxic behavior against mammalian cell lines. Further studies are needed for assessing risk in relation to the possible benefit of prescribing AgNPs.
Haider, Adnan,Kang, Inn-Kyu Hindawi Limited 2015 Advances In Materials Science And Engineering Vol.2015 No.-
<P>Silver nanoparticles (Ag-NPs) have diverted the attention of the scientific community and industrialist itself due to their wide range of applications in industry for the preparation of consumer products and highly accepted application in biomedical fields (especially their efficacy against microbes, anti-inflammatory effects, and wound healing ability). The governing factor for their potent efficacy against microbes is considered to be the various mechanisms enabling it to prevent microbial proliferation and their infections. Furthermore a number of new techniques have been developed to synthesize Ag-NPs with controlled size and geometry. In this review, various synthetic routes adapted for the preparation of the Ag-NPs, the mechanisms involved in its antimicrobial activity, its importance/application in commercial as well as biomedical fields, and possible application in future have been discussed in detail.</P>
Pair-Wise Serial ROIC for Uncooled Microbolometer Array
Haider, Syed Irtaza,Majzoub, Sohaib,Alturaigi, Mohammed,Abdel-Rahman, Mohamed The Institute of Electronics and Information Engin 2015 IEIE Transactions on Smart Processing & Computing Vol.4 No.4
This work presents modelling and simulation of a readout integrated circuit (ROIC) design considering pair-wise serial configuration along with thermal modeling of an uncooled microbolometer array. A fully differential approach is used at the input stage in order to reduce fixed pattern noise due to the process variation and self-heating-related issues. Each pair of microbolometers is pulse-biased such that they both fall under the same self-heating point along the self-heating trend line. A ${\pm}10%$ process variation is considered. The proposed design is simulated with a reference input image consisting of an array of $127{\times}92$ pixels. This configuration uses only one unity gain differential amplifier along with a single 14-bit analog-to-digital converter in order to minimize the dynamic range requirement of the ROIC.
Haider, Adnan,Gupta, Kailash Chandra,Kang, Inn-Kyu Springer 2014 NANOSCALE RESEARCH LETTERS Vol.9 No.1
<P>The development of tissue engineering in the field of orthopedic surgery is booming. Two fields of research in particular have emerged: approaches for tailoring the surface properties of implantable materials with osteoinductive factors as well as evaluation of the response of osteogenic cells to these fabricated implanted materials (hybrid material). In the present study, we chemically grafted insulin onto the surface of hydroxyapatite nanorods (nHA). The insulin-grafted nHAs (nHA-I) were dispersed into poly(lactide-co-glycolide) (PLGA) polymer solution, which was electrospun to prepare PLGA/nHA-I composite nanofiber scaffolds. The morphology of the electrospun nanofiber scaffolds was assessed by field emission scanning electron microscopy (FESEM). After extensive characterization of the PLGA/nHA-I and PLGA/nHA composite nanofiber scaffolds by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectrometry (EDS), and transmission electron microscopy (TEM), the PLGA/nHA-I and PLGA/nHA (used as control) composite nanofiber scaffolds were subjected to cell studies. The results obtained from cell adhesion, alizarin red staining, and Von Kossa assay suggested that the PLGA/nHA-I composite nanofiber scaffold has enhanced osteoblastic cell growth, as more cells were proliferated and differentiated. The fact that insulin enhanced osteoblastic cell proliferation will open new possibilities for the development of artificial scaffolds for bone tissue regeneration.</P>
( Haider Muhammad Salman ),김희택,( Syed Muhammad Imran Hassan ),( Manwar Hussain ),( Shao Godlisten Namwel ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Improving the life time of water treatment membranes can be achieved through exquisite control of the active disinfectant release. The Ppresent study demonstrates a comparison between PES-Gr-AgNPs, PES-CNT-AgNPs and aminenated PES-AgNPs composite polymer membrane for silver release to check the life time of water treatment membrane. Antibacterial activities of the samples were carried out to investigate the disinfection performance of the samples on the Gram negative bacteria (Escherichia coli). A predominant relation between Silver release and disinfection was accessed using the as-synthesized membranes. The physical-chemical properties of the samples were examined by XRD, SEM-EDAX, and HRTEM analyses.
Prognostic impact of lymphadenectomy in uterine clear cell carcinoma
Haider Mahdi,David Lockhart,Mehdi Moselmi-Kebria 대한부인종양학회 2015 Journal of Gynecologic Oncology Vol.26 No.2
Objective: The aim of this study was to estimate the survival impact of lymphadenectomy in patients diagnosed with uterineclear cell cancer (UCCC). Methods: Patients with a diagnosis of UCCC were identified from Surveillance, Epidemiology, and End Results (SEER) programfrom 1988 to 2007. Only surgically treated patients were included. Statistical analysis using Student t-test, Kaplan-Meier survivalmethods, and Cox proportional hazard regression were performed. Results: One thousand three hundred eighty-five patients met the inclusion criteria; 955 patients (68.9%) underwentlymphadenectomy. Older patients (≥65) were less likely to undergo lymphadenectomy compared with their younger cohorts(64.3% vs. 75.9%, p<0.001). The prevalence of nodal metastasis was 24.8%. Out of 724 women who had disease clinicallyconfined to the uterus and underwent lymphadenectomy, 123 (17%) were found to have nodal metastasis. Lymphadenectomywas associated with improved survival. Patients who underwent lymphadenectomy were 39% (hazard ratio [HR], 0.61; 95%confidence interval [CI], 0.52 to 0.72; p<0.001) less likely to die than patient who did not have the procedure. Moreover, moreextensive lymphadenectomy correlated positively with survival. Compared to patients with 0 nodes removed, patients withmore extensive lymphadenectomy (1 to 10 and >10 nodes removed) were 32% (HR, 0.68; 95% CI, 0.56 to 0.83; p<0.001) and 47%(HR, 0.53; 95% CI, 0.43 to 0.65; p<0.001) less likely to die, respectively. Conclusion: The extent of lymphadenectomy is associated with an improved survival of patients diagnosed with UCCC.