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Computer-Vision Based Object Detection and Recognition for Service Robot in Indoor Environment

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Computers, Materials & Continua 2022年第7期72卷 197-213页

作者： Kiran Jot singh Divneet singh kapoor Khushal Thakur Anshul Sharma Xiao-Zhi Gao Embedded Systems&Robotics Research Group Chandigarh UniversityMohali140413PunjabIndia School of Computing University of Eastern FinlandYliopistonranta 1FI-70210KuopioFinland

The near future has been envisioned as a collaboration of humans with mobile robots to help in the day-to-day *** this paper,we present a viable approach for a real-time computer vision based object detection and recognition for efficient indoor navigation of a mobile *** mobile robotic systems are utilized mainly for home assistance,emergency services and surveillance,in which critical action needs to be taken within a fraction of second or *** object detection and recognition is enhanced with utilization of the proposed algorithm based on the modification of You Look Only Once(YOLO)algorithm,with lesser computational requirements and relatively smaller weight size of the network *** proposed computer-vision based algorithm has been compared with the other conventional object detection/recognition algorithms,in terms of mean Average Precision(mAP)score,mean inference time,weight size and false positive *** presented framework also makes use of the result of efficient object detection/recognition,to aid the mobile robot navigate in an indoor environment with the utilization of the results produced by the proposed *** presented framework can be further utilized for a wide variety of applications involving indoor navigation robots for different services.

关键词： Computer-vision real-time computing object detection robot robot navigation localization environment sensing neural networks YOLO

Oxide ancillary ligand-based europium β-diketonate complexes and their enhanced luminosity

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Rare Metals 2021年第10期40卷 2873-2881页

作者： Devender singh Shri Bhagwan Anuj Dalal Kapeesha Nehra Raman Kumar Saini kapoor.singh Anura Priyajith Simantilleke Sumit Kumar Ishwar singh Department of Chemistry Maharshi Dayanand UniversityRohtak 124001India Centre de Fisica Universidade of MinhoBraga 4710057Portugal Department of Chemistry DCR University of Science and TechnologyMurthal 131039India

Ternary materials of europium complex with2,2,6,6-tetramethyl-3,5-heptanedione(tmhd) ligand and aqua ligand as ancillary ligands have been prepared and characterized for various optoelectronic *** of hydrated complex [Eu(tmhd)_(3)(H_(2)O)_(2)] proceeded with triphenylphosphine oxide(TPPO) and pyridine-N-oxide(PNO) ancillary ligands were studied to develop novel complexes. The prepared complexes show good thermal stability. A comparative investigation of preparedmaterials[Eu(tmhd)_(3)(H_(2)O)_(2)],[Eu(tmhd)_(3)(TPPO)_(2)] and [Eu(tmhd)_(3)(PNO)_(2)] was conducted for their luminescent behaviors in order to obtain the role of ancillary ligand in the enhancement of illumination amount generated from europium(Eu^(3+)) ion. Color coordinates of prepared ternary complexes such as[Eu(tmhd)_(3)(H_(2)O)_(2)]with(x = 0.54,y = 0.32),[Eu(tmhd)_(3)(TPPO)_(2)] with(x = 0.56, y = 0.32) and[Eu(tmhd)_(3)(PNO)_(2)] with(x = 0.57, y = 0.33) indicated that these materials exhibited bright red emission in visible region spectrum. The complexes show a proficient energy transport pathway from the ligands to the innermost Eu^(3+)by means of an ancillary ligand-sensitized luminescence process. Interaction between the metal and ligand results in a distinguished effect on quantum efficiency(η) as well as on Judd–Ofelt intensity factor(Ω_(2)) of the prepared materials.

关键词： Ternary Eu^(3+)complexes Red emissive materials Photoluminescence Quantum efficiency Judd-Ofelt intensity Optoelectronic devices

Contrast-free air cholangiography-assisted unilateral plastic stenting in malignant hilar biliary obstruction

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Hepatobiliary & Pancreatic Diseases International 2010年第1期9卷 88-92页

作者： Virendra singh Gurpreet singh Vikas Gupta Rajesh Gupta Rakesh kapoor Departments of Hepatology Postgraduate Institute of Medical Education and Research Departments of Surgery Postgraduate Institute of Medical Education and Research Departments of Radiotherapy Postgraduate Institute of Medical Education and Research

BACKGROUND:Endoscopic palliation in malignant hilar biliary obstruction requires endoscopic retrograde cholangiopancreatography (ERCP),whereas contrast injection leads to ***-free metal stenting with or without magnetic resonance cholangiopancreatography (MRCP) has shown encouraging results,but MRCP and metal stents are *** have been no reports on the use of air ***:We prospectively evaluated the role of air cholangiography-assisted unilateral plastic stenting in 10 patients with type Ⅱ malignant hilar biliary obstruction.A retrospectively analysed group of 10 patients treated with contrast-free unilateral metal stenting served as historical ***:Ten patients with unresectable type Ⅱ malignant hilar biliary obstruction were *** cholangiography detected type Ⅱ obstruction in all patients,similar to *** patients underwent unilateral *** endoscopic drainage was achieved in all *** mean patency of the stent was 95.8±17.5 days in the study group and 143.9±115.1 days in the control group (P=0.20).The mean survival was 121.8±41.6 days in the study group and 154.9±122.5 days in the control group (P=0.42).KaplanMeier analysis showed an estimated median survival of 100:95% CI (65.9,134.1) days in the study group and 98:95% CI (84.1,111.9) days in the control group (P=0.62).Cholangitis occurred in none of the patients and there were no 30-day deaths nor major *** cholangiographyassisted unilateral plastic stenting was cheaper than contrastfree unilateral metal ***:Air cholangiography-assisted unilateral plastic stenting is as safe and effective as contrast-free unilateral metal stenting in type Ⅱ malignant hilar biliary obstruction for palliating patients,but it is cheaper.

关键词： air cholangiogram hilar obstruction malignant plastic stent metal stent unilateral

Exploration of IoT Nodes Communication Using LoRaWAN in Forest Environment

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Computers, Materials & Continua 2022年第6期71卷 6239-6256页

作者： Anshul Sharma Divneet singh kapoor Anand Nayyar Basit Qureshi Kiran Jot singh Khushal Thakur Embedded Systems&Robotics Research Group Chandigarh UniversityMohali140413PunjabIndia Graduate School Duy Tan UniversityDa Nang550000Vietnam Faculty of Information Technology Duy Tan UniversityDa Nang550000Vietnam Department of Computer Science Prince Sultan UniversityRiyadh11586Saudi Arabia

The simultaneous advances in the Internet of Things(IoT),Artificial intelligence(AI)and Robotics is going to revolutionize our world in the near *** recent years,LoRa(Long Range)wireless powered by LoRaWAN(LoRa Wide Area Network)protocol has attracted the attention of researchers for numerous applications in the IoT *** is a low power,unlicensed Industrial,Scientific,and Medical(ISM)bandequipped wireless technology that utilizes a wide area network protocol,i.e.,LoRaWAN,to incorporate itself into the network *** this paper,we have evaluated the LoRaWAN communication protocol for the implementation of the IoT(Internet of Things)nodes’communication in a forest *** outdoor performance of LoRa wireless in LoRaWAN,i.e.,the physical layer,has been evaluated in the forest area of Kashirampur Uttarakhand,***,the present paper aims towards analyzing the performance level of the LoRaWAN technology by observing the changes in Signal to Noise Ratio(SNR),Packet Reception Ratio(PRR)and Received Signal Strength Indicator(RSSI),with respect to the distance between IoT *** article focuses on estimating network lifetime for a specific set of LoRa configuration parameters,hardware selection and power *** the experimental results,it has been observed that transmissions can propagate to a distance of 300 m in the forest environment,while consuming approx.63%less energy for spreading factor 7 at 2 dBm,without incurring significant packet loss with PRR greater than 80%.

关键词： LoRa LoRaWAN IoT communication protocol wireless sensor networks packet reception ratio

Laser-induced graphene-coated wearable smart textile electrodes for biopotentials signal monitoring

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Frontiers of Materials Science 2024年第1期18卷 95-111页

作者： C.M.Vidhya Yogita Maithani Sakshi kapoor J.P.singh Department of Physics Indian Institute of Technology DelhiHauz KhasNew Delhi 110016India

This paper describes how to produce a wearable dry electrode at a reasonable cost and how to use it for the monitoring of biopotentials in *** textiles in wearable technologies have made a great advancement in the health care management and living standards of *** was manufactured using the low-cost single-step process,laser ablation of polyimide,a commercial *** dispersions were made using solvent isopropyl alcohol which has low boiling point,nontoxicity,and environmental *** successive coating of the graphene dispersion on the cotton fabric to make it conductive,the sheet resistance of the resulting fabric dropped to 3% of its initial *** laser-induced graphene(LIG)cotton dry electrodes thus manufactured are comparable to Ag/AgCl wet electrodes in terms of the skin-to-electrode impedance,measuring between 78.0 and 7.2 kΩ for the frequency between 40 Hz and 1 *** LIG cotton electrode displayed a signal-to-noise ratio of 20.17 *** to its comfort,simplicity,and good performance over a longer period of time,the textile electrode appears suited for medical applications.

关键词： biopotential electrocardiogram electromyogram flexible electrode textile porous graphene

Performance analysis of SiGe double-gate N-MOSFET

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Journal of Semiconductors 2017年第4期38卷 38-44页

作者： A.singh D.kapoor R.Sharma Department of Electronics and Communication Engineering Vaish College of EngineeringRohtak 124001India Department of Electronics and Communication Engineering Northern India Engineering CollegeNew Delhi 110053India

The major purpose of this paper is to find an alternative configuration that not only minimizes the limitations of single-gate（SG） MOSFETs but also provides the better replacement for future *** this paper,the electrical characteristics of SiGe double-gate N-MOSFET are demonstrated and compared with electrical characteristics of Si double-gate ***,in this paper the electrical characteristics of Si doublegate N-MOSFET are demonstrated and compared with electrical characteristics of Si single-gate *** simulations are carried out for the device at different operational voltages using Cogenda Visual TCAD ***,we have designed its structure and studied both Id-Vg characteristics for different voltages namely 0.05,0.1,0.5,0.8,1 and 1.5 V and Id-Vd characteristics for different voltages namely 0.1,0.5,1 and 1.5 V at work functions 4.5,4.6 and 4.8 eV for this *** performance parameters investigated in this paper are threshold voltage,DIBL,subthreshold slope,GIDL,volume inversion and MMCR.

关键词： double gate MOSFET DIBL GIDL volume inversion SiGe Genius tool

Anemia in cirrhosis:An underestimated entity

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World Journal of Clinical Cases 2022年第3期10卷 777-789页

作者： Manish Manrai Saurabh Dawra Rajan kapoor Sharad Srivastava Anupam singh Department of Internal Medicine Armed Forces Medical CollegePune 411040India Department of Medicine and Gastroenterology Command HospitalPune 411040India Department of Medicine Command HospitalKolkata 70027India Department of Gastroenterology Post Graduate Institute of Medical Education and ResearchChandigarh 160012India

Anemia in a patient with cirrhosis is a clinically pertinent but often overlooked clinical *** guidelines highlight the algorithmic approach of managing a patient of cirrhosis presenting with acute variceal hemorrhage but day-to-day management in hospital and out-patient raises multiple dilemmas:Whether anemia is a disease complication or a part of the disease spectrum?Should iron,folic acid,and vitamin B complex supplementation and nutritional advice,suffice in those who can perform tasks of daily living but have persistently low *** does one investigate and manage anemia due to multifactorial etiologies in the same patient:Acute or chronic blood loss because of portal hypertension and bone marrow aplasia secondary to hepatitis B or C viremia?To add to the clinician’s woes the prevalence of anemia increases with increasing disease *** thus aim to critically analyze the various pathophysiological mechanisms complicating anemia in a patient with cirrhosis with an emphasis on the diagnostic flowchart in such patients and proposed management protocols thereafter.

关键词： Anemia Cirrhosis Iron deficiency anemia Macrocytic anemia Normocytic anemia

Gallbladder and cystic duct agenesis diagnosed laparoscopically

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Hepatobiliary & Pancreatic Diseases International 2010年第1期9卷 107-108页

作者： Nikhil Gupta Sandeep K Gupta Harmeet singh kapoor Department of Surgery Maulana Azad Medical College Department of Surgery Sri Balaji Action Medical Institute

To the Editor:Anatomical variations of the biliary tree are not un-common but isolated agenesis of the gallbladder is rare,[1]with a reported incidence of 0.013%-0.075%.[2]Thisvariation remains undiagnosed since the p... 详细信息

关键词： Gallbladder and cystic duct agenesis diagnosed laparoscopically

Stress Ameliorative Effects of Indole Acetic Acid on Hordeum vulgare L. Seedlings Subjected to Zinc Toxicity

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Phyton-International Journal of Experimental Botany 2020年第1期89卷 71-86页

作者： Monika Sood Shanti S.Sharma Joginder singh Ram Prasad Dhriti kapoor School of Bioengineering and Biosciences Lovely Professional University PhagwaraPunjab144411India School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou510006China Department of Botany Mahatma Gandhi Central UniversityMotihariBihar845401India

The heavy metals present in the environment accumulate in the plants and affect their productivity and *** entering the food chain,metals cause several serious health problems in human beings as well as in other *** acetic acid(IAA)is known to act as a signaling molecule between symbiotic association of metal accumulating plants and plant growth promoting rhizobacteria(PGPR).Present study demonstrated a protective role of IAA against surplus Zinc(Zn)-induced toxicity to Hordeum vulgare *** Zn concentrations suppressed the plant growth,caused a reduction in leaf relative water contents(RWC)and elevated free proline and non-protein thiols(NPT)*** treatment also led to enhanced lipid peroxidation(MDA contents)as well as the activity of ascorbate peroxidase(APX),showing the involvement of antioxidative defense mechanism to reduce Zn induced *** oxidase activity was also observed to increase due to Zn *** pretreatment of *** caryopsis could partly revert the Zn-induced toxicity in seedlings.

关键词： Heavy metals phytohormone lipid peroxidation non-protein thiols(NPT) relative water contents(RWC) free proline ascorbate peroxidase(APX) IAA oxidase