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A review on sensors and systems in structural health monitoring: current issues and challenges
Mahammad A. Hannan,Kamrul Hassan,Ker Pin Jern 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.5
Sensors and systems in Civionics technology play an important role for continuously facilitating real-time structure monitoring systems by detecting and locating damage to or degradation of structures. An advanced materials, design processes, long-term sensing ability of sensors, electromagnetic interference, sensor placement techniques, data acquisition and computation, temperature, harsh environments, and energy consumption are important issues related to sensors for structural health monitoring (SHM). This paper provides a comprehensive survey of various sensor technologies, sensor classes and sensor networks in Civionics research for existing SHM systems. The detailed classification of sensor categories, applications, networking features, ranges, sizes and energy consumptions are investigated, summarized, and tabulated along with corresponding key references. The current challenges facing typical sensors in Civionics research are illustrated with a brief discussion on the progress of SHM in future applications. The purpose of this review is to discuss all the types of sensors and systems used in SHM research to provide a sufficient background on the challenges and problems in optimizing design techniques and understanding infrastructure performance, behavior and current condition. It is observed that the most important factors determining the quality of sensors and systems and their reliability are the long-term sensing ability, data rate, types of processors, size, power consumption, operation frequency, etc. This review will hopefully lead to increased efforts toward the development of low-powered, highly efficient, high data rate, reliable sensors and systems for SHM.
A review on sensors and systems in structural health monitoring: current issues and challenges
Hannan, Mahammad A.,Hassan, Kamrul,Jern, Ker Pin Techno-Press 2018 Smart Structures and Systems, An International Jou Vol.22 No.5
Sensors and systems in Civionics technology play an important role for continuously facilitating real-time structure monitoring systems by detecting and locating damage to or degradation of structures. An advanced materials, design processes, long-term sensing ability of sensors, electromagnetic interference, sensor placement techniques, data acquisition and computation, temperature, harsh environments, and energy consumption are important issues related to sensors for structural health monitoring (SHM). This paper provides a comprehensive survey of various sensor technologies, sensor classes and sensor networks in Civionics research for existing SHM systems. The detailed classification of sensor categories, applications, networking features, ranges, sizes and energy consumptions are investigated, summarized, and tabulated along with corresponding key references. The current challenges facing typical sensors in Civionics research are illustrated with a brief discussion on the progress of SHM in future applications. The purpose of this review is to discuss all the types of sensors and systems used in SHM research to provide a sufficient background on the challenges and problems in optimizing design techniques and understanding infrastructure performance, behavior and current condition. It is observed that the most important factors determining the quality of sensors and systems and their reliability are the long-term sensing ability, data rate, types of processors, size, power consumption, operation frequency, etc. This review will hopefully lead to increased efforts toward the development of low-powered, highly efficient, high data rate, reliable sensors and systems for SHM.
Heuristic Guided Artificial Potential Field for Avoidance of Small Obstacles
Sagar Dalai,Mahammad Irfan,Samarth Singh,Kaushal Kishore,Dr. S.A Akbar 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
In this paper, a modified heuristic guided Artificial Potential Field (APF) based algorithm has been proposed to find a practical trajectory for an Autonomous Unmanned Aerial Vehicle (UAV) path planning. The local minima are encountered in the conventional APF algorithm due to the cancellation of attractive and repulsive potential while avoiding unknown obstacles within the desired path, which results in the trapping of the agent before reaching the goal. Consequently, the traditional APF technique is therefore no longer advantageous in such cases. So in this proposed perpendicular approach based on APF helps to avoid such local minima. The advantage of the newly proposed method is the low computing time that lines up with the standard global path planner method. The proposed algorithm is tested and validated against existing general potential field techniques for different simulation scenarios in a 3D simulated environment using ROS and Gazebo supported PX4-SITL. The results have been presented for drone navigation and obstacle avoidance for the different scenarios in a simulated environment.
Zare, Hamid Reza,Ardakani, Mahammad Mazloum,Nasirizadeh, Navid,Safari, Javad Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.1
A PVC membrane electrode for lead ion based on 1-phenyl-2-(2-quinolyl)-1,2-dioxo-2-(4-bromo) phenylhydrazone (PQDBP) as ionophore was demonstrated. The optimum composition of the membrane was 30 wt% poly(vinyl chloride), 60 wt% dibutyl phthalate as a plasticizer, 4 wt% ionophore and 6 wt% sodium tetraphenylborate as additive. The electrode exhibits a Nernstian response (28.7 mV decade$^{-1}$) for Pb$^{2+}$ over a wide concentration range (1.0 ${\times}$ 10$^{-1}$ to 1 ${\times}$ 10$^{-6}$ M) with a detection limit of 6.0 ${\times}$ 10$^{-7}$ M. This sensor has a short response time and can be used for at least 2 months without any divergence in potentials. The proposed electrode could be used in a pH range of 3.0-6.0 and revealed good selectivities for Pb$^{+2}$ over a wide variety of other metal ions. It was successfully applied as an indicator electrode for the potentiometric titration of lead ion with potassium chromate and for the direct determination of lead in mine.
Saeedeh Talebi,Andrew S. Day,Majid Khadem Rezaiyan,Golnaz Ranjbar,Mitra Zarei,Mahammad Safarian,Hamid Reza Kianifar 대한소아소화기영양학회 2022 Pediatric gastroenterology, hepatology & nutrition Vol.25 No.1
Inflammation plays an important role in the outcome of patients with cystic fibrosis (CF). It may develop due to cystic fibrosis transmembrane conductance regulator protein dysfunction, pancreatic insufficiency, or prolonged pulmonary infection. Fecal calprotectin (FC) has been used as a noninvasive method to detect inflammation. Therefore, the aim of the current meta-analysis was to investigate the relationship between FC and phenotype severity in patients with CF. In this study, searches were conducted in PubMed, Science Direct, Scopus, and Embase databases up to August 2021 using terms such as “cystic fibrosis,” “intestine,” “calprotectin,” and “inflammation.” Only articles published in English and human studies were selected. The primary outcome was the level of FC in patients with CF. The secondary outcome was the relationship between FC and clinical severity. Statistical analysis was performed using Comprehensive Meta-Analysis software. Of the initial 303 references, only six articles met the inclusion criteria. The mean (95% confidence interval [CI]) level of FC was 256.5 mg/dL (114.1-398.9). FC levels were significantly associated with pancreatic insufficiency (mean, 243.02; 95% CI, 74.3 to 411.6; p=0.005; I2=0), pulmonary function (r=–0.39; 95% CI, –0.58 to –0.15; p=0.002; I2=60%), body mass index (r=–0.514; 95% CI, 0.26 to 0.69; p<0.001; I2=0%), and Pseudomonas colonization (mean, 174.77; 95% CI, 12.5 to 337.02; p=0.035; I2=71%). While FC is a reliable noninvasive marker for detecting gastrointestinal inflammation, it is also correlated with the severity of the disease in patients with CF.
Mijanuddin, Md.,Jana, Atish Dipankar,Drew, Michael G.B.,Hong, Chang Seop,Chattopadhyay, Basab,Mukherjee, Monika,Nandi, Mahasweta,Bhaumik, Asim,Helliwell, Madeline,Mostafa, Golam,Ali, Mahammad Elsevier 2009 Polyhedron Vol.28 No.4
<P><B>Graphical abstract</B></P><P>Two concomitant polymorphic coordination complexes (<B>I</B> and <B>II</B>) have been characterized crystallographically. Complex <B>I</B> shows the presence of a strong antiferromagnetic interaction and good catalytic efficiency in the liquid phase partial oxidation of olefins when immobilized on 2D-hexagonal mesoporous silica.</P><ce:figure></ce:figure> <P><B>Abstract</B></P><P>Two concomitant polymorphic coordination complexes (dark blue – <B>I</B> and black – <B>II</B>) with the formula (Cu<SUB>2</SUB>C<SUB>44</SUB>H<SUB>60</SUB>N<SUB>4</SUB>O<SUB>4</SUB>) have been synthesized and characterized crystallographically. Magnetic measurements show the presence of a strong antiferromagnetic interaction and the 2<I>J</I> value corresponds extremely well to the theoretically calculated one, indicating the fact that it follows nicely the magneto-structural relationship. Immobilization of the copper(II) complex <B>1</B> on a 2D-hexagonal mesoporous silica showed good catalytic efficiency in the liquid phase partial oxidation of olefins in the presence of TBHP as an oxidant.</P>
Response of the topological surface state to surface disorder in TiBiSe₂
Florian PIELMEIER,Gabriel LANDOLT,Bartosz SLOMSKI,Stefan MUFF,Julian BERWANGER,Andreas EICH,Alexander A KHAJETOORIANS,Jens WIEBE,Ziya S ALIEV,Mahammad B BABANLY,Roland WIESENDANGER,Jurg OSTERWALDER,Ev 한국진공학회 2016 한국진공학회 학술발표회초록집 Vol.2016 No.8