The optical properties of Yb3+ and Er3+ co-doped Ln2BaZnO5 (Ln = Y or Gd), synthesized by solid-state reaction, are investigated in detail. Two main emission bands centered around 548 nm (green) 673 (red) observed under 977 laser excitation via an upconversion process. Studies the behavior as a function dopant concentration described relatively high infrared to visible efficiencies ∼5% obtained at room temperature. Under modulated for fixed concentrations, upconverted chromaticity can be...

A comprehensive study of the optical properties PbS nanocrystals (NCs) is reported that includes temperature dependent absorption, photoluminescence (PL) and PL lifetime in range 3–300 K. The absorption are found to display different behaviour though both redshift as reduced. This results a Stokes shift which increases from ∼75 meV at 300 K with reducing until saturating ∼130 below ∼150 prior small reduction 125 upon cooling 25 3 be single exponential τ1 = 6.5 μs. Above biexponential...

Abstract Hybrid PbS nanocrystal/C 60 fullerite photodetectors are fabricated using a simple one‐step drop casting procedure onto pre‐patterned interdigitated electrodes. The devices exhibit broad spectral response from the near UV through to infrared yielding detectivity, D* , of above 10 Jones 400 nm ≈1050 nm. ability further extend wavelengths ≈1350 in via tuning nanocrystal diameter is also demonstrated. dynamic responses presented, exhibiting fast photocurrent rise time (<40 ns)...

A simple synthetic route to ∼4 nm diameter mercury sulfide (HgS) QDs existing in the cubic metastable (β-HgS) crystal phase is first demonstrated. Essential experimental evidence support atomistic tight binding models of negative band gap HgS quantum dots (QDs) presented. Optical characterization β-HgS shows photoluminescence (PL) peaking at ∼1.1 eV, a ∼1.21 and ∼90 meV Stokes shift with PL originating from two distinct processes. In absence any previous comprehensive these observations are...

In this report, we describe a synthesis of high quality infrared emitting HgSe quantum dots using variety room temperature routes, resulting in particles various morphologies.

Image processing technique has been used to produce automated detection of Sickle Cell Anemia. A Laplacian Gaussian (LoG) edge algorithm computed detect sickle cells diseases at the early stage in diagnosing patient. MATLAB software able demonstrate abnormalities human Red Blood (RBC) single shapes and quantities present each dataset. data samples from government Ampang Hospital contributed this study validate results.

A number of organizations, both medical and non-medical, have adopted assistive technology, such as wireless wristbands fall detection devices. Most research on using deep learning techniques are based image data sets, which not readily available. So, researchers focused making a learning-based classifier that takes numerical input sensors perform effectively, so costs can be reduced. Deep is an device to detect particularly for elderly people significantly reduce the mortality rate from...

Charge transfer interactions between PbS nanocrystals (NCs) and tetrathiafulvalene (TTF) 7,7,8,8-tetracyanoquinodimethane (TCNQ) are studied using optical spectroscopy. Selective quenching of NC photoluminescence (PL) by TTF is observed related to the relative alignment highest occupied molecular orbital (HOMO) 1s(h) energy level. TCNQ also found quench PL irrespective bandgap. A ground-state charge mechanism proposed account for indirectly supported changes in absorption spectra PbS-TTF...

Telehealth plays an even greater role in global healthcare delivery today. Ever since the pandemic strikes world, use of monitoring systems has a massive boost significantly. This paper aims to develop prototype health device that can be put at patient home replace traditional physical checkups hospital by using MAX30102 PPG module and Infrared temperature sensor with objective derive signal into basic parameters such as heart rate oxygen saturation from through test accuracy those monitor....

In 2020 World Health Organization (WHO) has declared that the Coronaviruses (COVID-19) pandemic is causing a worldwide health disaster. One of most effective protections for reducing spread COVID-19 by wearing face mask in densely and close populated areas. various countries, it become mandatory to wear public The process monitoring large numbers individuals comply with new rule can be challenging task. A cost-effective method monitor number this law through computer vision Convolution...

Human Activity Recognition (HAR) is significant, especially in the medical field. recognition has been used various ways as technology advanced, particularly using a smartphone-based approach. This work aims to evaluate accuracy of triaxial accelerometer Matlab Mobile and examine development performance algorithms identifying human motions on individuals similar ages physical appearances. Motion signals from three subjects are measured, data preprocessed filtering technique, features...

Air pollution is one of the most significant issues addressed recently. The impact lies on public and individual health where illness mortality found increased. There are numerous factors affect air quality, including current weather, especially wind precipitation. variations in quality depends regions (industrial or housing area) as well day (morning afternoon) night (midnight) it could be elevated. Particulate matter (PM) refers to particles with a varied but extremely small diameter,...

Sickle cell disease, commonly known as SCA or SCD, is a genetic disorder that affects red blood cells. Instructions for performing morphometry on slides can now represent considerable amount of effort by medical professionals, which they often struggle with. This happens because manual reviews take longer to complete. The main purpose this article create way use the Convolutional Neural Network method developed using MATLAB application, will yield more accurate results in less time. neural...

A comprehensive study of the optical properties aqueous and non-polar solvent colloidal CdSeS/ZnS nanocrystals (NCs) is reported that includes absorption photoluminescence (PL). The different ligands have been change from oleic acid to carboxyl (COOH) amine (NH3) enhance capability NCs in biosensor application. shows typically 2 peak appear as shoulder where main centered at 460, 512 530 nm respectively. spectra are found be single Gaussian nature, displaying inhomogeneous broadening due...

Summary Introduction Volten VR4 ® capsules containing herb extract of Kaempferia parviflora has been claimed to reduce blood glucose in patients with diabetes. Objectives This preliminary study is conducted evaluate the efficacy on healthy individuals and type-2 diabetes mellitus volunteers. The extracts 400 mg (KP) were used measure level 2-hour postprandial. Methods group consists 15 young adults aged 20-30 no history serious diseases, while diabetic includes 12 35-75 diagnosed mellitus....