bluuebunny/crossref_metadata_2025 huggingface dataset:
A Study on the Cementitious Mortars Containing Multi-walled Carbon Nanotubes and Nanographene
Authors: Pachideh Ghasem , Toufigh Vahab
Published: February 2023

In this paper, the effects of the multi-walled carbon nanotubes (MWCNTs) and nanographene (GP) on the mechanical performance of the cementitious mortars were investigated in different environments. Six mix designs were fabricated by considering the previous studies and exposed to potable water, acidic, and alkaline environments. The GP and MWCNTs partially replaced the cement with 0.25 %, 0.5 %, and 1 % of its weight. The standard mechanical tests, X-ray diffraction (XRD), and scanning electron microscope (SEM) analysis were performed on the specimens. The results indicated that including the MWCNTs and GP increases the compressive strength by 10 % and 20 % and similarly improves the tensile strength by nearly 15 % and 35 %, respectively. Additionally, despite the decrease in strength of the specimens because of exposure to aggressive environments, incorporation of the GP and MWCNTs enhanced the mechanical properties and microstructural characteristics of the mortars and improved their workability. Based on the XRD and SEM analysis results, the MWCNTs can fill in the pores better than the GP, leading to a greater integrity in the mortar’s structure and, thus, better improving the performance of the cementitious mortars.
Evaluation of Pavement Surface Distress Using Image Processing and Artificial Neural Network
Authors: Ramachandraiah Suhas T. , Kumar Pradeep , Pasupunuri Sampath Kumar , Shinganmakki Jaya R.
Published: February 2023

Pavement evaluation helps assess the structural and functional condition of roads. Traditional pavement evaluation methods cannot efficiently and accurately assess the state of road conditions at the network level. Though the pavement evaluation techniques based on high-resolution cameras and laser sensors assess the road conditions efficiently at traffic speeds, there are a few limitations in respect of automotive detection and quantification of pavement surface distress. Though artificial intelligence is a broad area, machine learning applications in highway engineering were proven to be successful. This paper presents the automated pavement distress classification using a convolutional neural network (NN) from the Keras library. VGG-16, the deep convolutional NN (DCNN) model, was deployed by necessary modification to get the desired output. The model is trained on a big data set of images with a wide range of pavement defects and irregularities. A DCNN classifier trained with an “Adam” optimizer was used to change the features of the NN to minimize the loss. As an output, the model classifies the pavement surface distresses as alligator cracks, longitudinal cracks, transverse cracks, pothole, and no crack portion of the pavement with maximum accuracy using a DCNN classifier.
STRUCTURE OF Ge2Sb2Te5 THIN FILMS NEAR THE INFLECTION POINT OF THE RESISTIVITY TEMPERATURE DEPENDENCE
Authors:   National Research University of Electronic Technology, Zelenograd 124498, Russia, ZAYTSEVA Y. , LAZARENKO P. ,   National Research University of Electronic Technology, Zelenograd 124498, Russia, VOROBYOV YU. ,   bRyazan State Radio Engineering University, Ryazan 390005, Russia, YAKUBOV A. ,   National Research University of Electronic Technology, Zelenograd 124498, Russia, BORGARDT N. ,   National Research University of Electronic Technology, Zelenograd 124498, Russia, KOZYUKHIN S. ,   Kurnakov Institute of General and Inorganic Chemistry, RAS, Moscow 119991, Russia, SHERCHENKOV A. ,   National Research University of Electronic Technology, Zelenograd 124498, Russia
Published: February 2023

We investigated Ge2Sb2Te5 thin films annealed at the temperatures specific to the crystallization process using transmission electron microscopy. The annealing temperatures typical for the inflection point (168 °C) of the temperature dependence of resistivity and at the end of the crystallization process (183 °С) were chosen for the TEM studies. These studies clearly showed that the inflection point on the temperature dependence of resistivity is identified with a two-stage character of Ge2Sb2Te5 thin films crystallization.
INFLUENCE OF Mn ON STRUCTURAL, OPTICAL AND ELECTRICAL PROPERTIES OF Cu2(Zn1-xMnx)SnS4 THIN FILMS DEPOSITED BY SPRAY PYROLYSIS
Authors:   LRPCSI, Faculty of Sciences, Université 20 août 1955-Skikda, 21000 Skikda, Algeria, MOHAMMED CHERIF O. , MEFTAH A. ,   LRPCSI, Faculty of Sciences, Université 20 août 1955-Skikda, 21000 Skikda, Algeria, ATTAF N. ,   Thin Films and Interfaces Laboratory, Frères Mentouri Constantine University, 25000 Constantine, Algeria., KABIR A. ,   LRPCSI, Faculty of Sciences, Université 20 août 1955-Skikda, 21000 Skikda, Algeria
Published: February 2023

Cu2Zn1-xMnxSnS4 thin films were deposited onto glass substrates by spray pyrolysis method. They were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS) and UV-Visible spectroscopy and the four point probe techniques in order to study the effect of Mn on structural, optical and electrical properties of the samples. Definite x variable like ratio [Mn]/([Zn] + [Mn]) has been taken equal to 0, 0.2, 0.4, 0.6, 0.8 and 1. XRD and EDS analysis revealed the substitution of Mn in Zn sites. Cu2MnSn3S8 compound has appeared as a secondary phase in the films deposited with x ≥ 0.6. Optical band gap of the films increased from 1.34 to 1.68 eV with the increasing x value in the films deposited with (0.4 ≤ x ≤ 1). The resistivity decreases from 1.89 to 0.36 × 10-2 Ω.cm as a result of Sn amount in the film.
EFFECT OF ALTERNATE LAYERS OF Bi2Te3 - Sb2Te3 THIN FILMS ON STRUCTURAL, OPTICAL AND THERMOELECTRIC PROPERTIES
Authors:   Department of Physics, Vivekananda Global University, Jaipur-303012, Rajasthan, India, KUMARI M. ,   Department of Physics, Kanoria P.G. Mahila Mahavidyalaya, Jaipur- 302017, Rajasthan, India, SHARMA Y. C. ,   Department of Physics, Vivekananda Global University, Jaipur-303012, Rajasthan, India
Published: February 2023

There is an increasing demand for the development of new thermoelectric materials with high figure of merit. This is due to the fact that convectional energy generating methods causes many environmental problems. Thermoelectric materials have capacity to harvest waste energy as they convert directly any type of waste heat into electricity. Telluride based materials are known as best thermoelectric materials as they have high figure of merit. Present work is based on multilayered structure of bismuth telluride (Bi2Te3) and antimony telluride (Sb2Te3) thin films. In this work thin film of single layered Bi2Te3, Sb2Te3, their bilayers (Bi2Te3-Sb2Te3), 5 layers and 10 layers have been deposited on clean glass substrate by e-beam evaporation method. X- Ray diffraction (XRD) has been done for the characterization of these thin films. In this paper, studies of electrical properties are also reported which have been carried out by Hall and I-V measurements while optical properties have been studied by employing by UV – Vis spectrometer. Thermoelectric characteristics have been measured by laboratory thermoelectric measurement setup.
THE EFFECT OF Ag CONTENT AND HEAT TREATMENT ON STRUCTURAL
Authors:   College of Education for pure Science_Ibn Al-Haitham, University of Baghdad, Iraq, MOHAMMED H. I. , KHDAYER I. H. ,   College of Education for pure Science_Ibn Al-Haitham, University of Baghdad, Iraq, NAJI I. S. ,   College of Science, University of Baghdad, Iraq
Published: February 2023

(Cu1-x,Agx)2ZnSnSe4 alloys have been fabricated with different Ag content(x=0, 0.1, and 0.2) successfully from their elements. Thin films of these alloys have been deposited on coring glass substrate at room temperature by thermal evaporation technique under vacuum of 10-5Torr with thickness of 800nm and deposition rate of 0.53 nm/sec. Later, films have been annealed in vacuum at (373, and 473)K, for one hour. The crystal structure of fabricated alloys and as deposited thin films had been examined by XRD analysis, which confirms the formation of tetragonal phase in [112] direction, and no secondary phases are founded. The shifting of main polycrystalline peak (112) to lower Bragg’s angle as compared to Cu2ZnSnSe4 angle refers to incorporation of Ag in the lattice. Annealing films adopt the similar structure, but peaks become sharper and more intensity, and crystallizing increase with increasing annealing temperature. AFM images confirms that all thin CAZTSe films are polycrystalline in nature and demonstrated that the size of grains increases with increasing Ag content and annealing temperature.
AC CONDUCTIVITY AND DIELECTRIC PROPERTIES OF AMORPHOUS Se69Sn10Ge21-xSbx (6≤ x ≤14) GLASSY SYSTEM
Authors:   Department of Physics, Himachal Pradesh University, Summerhill Shimla, India, CHAUDHARY S. , MODGIL V. ,   Department of Higher Education, Shimla, Himachal Pradesh, India., RANGRA V. S. ,   Department of Physics, Himachal Pradesh University, Summerhill Shimla, India
Published: February 2023

The glassy network system under investigation is prepared by using melt quench technique. The ac conductivity and dielectric behavior studied in ac frequency range (500Hz–1MHz) below glass transformation region. The correlated barrier hopping (CBH) model is used for interpreting the relation between the frequency exponent and temperature. The equation based on the Guintini model gives the value of maximum barrier height from the dielectric measurements. The compositional variation of conduction mechanism and dielectric parameters is studied to explore material’s nature.
EFFECT OF Gd2O3 DOPING ON DIELECTRIC PROPERTIES OF Ba(Zr0.1Ti0.9)O3 CERAMICS
Authors:   Chemical College, Shijiazhuang University, Shijiazhuang 050035, China, LI Z. , LI Y ,   Analysis and Testing Research Centre, North China University of Science and Technology, Tangshan 063210, China), TAN H. ,   Chemical College, Shijiazhuang University, Shijiazhuang 050035, China, CI L. ,   Chemical College, Shijiazhuang University, Shijiazhuang 050035, China
Published: February 2023

Using BaCO3, TiO2, ZrO2 and Gd2O3 as the starting materials, the Ba(Zr0.1Ti0.9)O3 ceramics are prepared using solid state synthesis method, and effects of Gd2O3 dopant on microstructure and dielectric properties of Ba(Zr0.1Ti0.9)O3 ceramics are investigated. The results show that the crystal structure for Ba(Zr0.1Ti0.9)O3 ceramics is a single perovskite structure, and the doping of Gd3+ does not generate new phase. With the Gd2O3 concentration increasing, the grain size increases continuously, when the doping amount x ≥ 0.5 mol %, the grain size basically remains unchanged, the grain size is uniform. With the Gd2O3 content increasing, the dielectric constants rose first and then decreased under different sintering conditions of 1280 °C, 1300 °C, 1330 °C, and 1350 °C. When the sintering temperature is 1350 °C and the Gd3+ doping amount is x = 0.5 mol %, the dielectric loss is minimal, the dielectric constant is the highest, and the dielectric performance at room temperature is optimal. Gd2O3 doping has little effect on the movement of the Curie point of BZT ceramics, but the doping of Gd2O3 can increase the peak of the dielectric peak at the Curie point.
EFFECT OF pH ON PHOTOCATALYTIC ACTIVITIES OF BiOBr NANOMATERIALS SYNTHESIZED BY SONOCHEMICAL METHOD
Authors:   Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, PATIPHATPANYA P. , INTAPHONG P. ,   Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand, PHURUANGRAT A. ,   Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand, KUNTALUE B. ,   Electron Microscopy Research and Service Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, DUMRONGROJTHANATH P. ,   Rajamangala University of Technology Lanna Chiang Rai, Chiang Rai 57120, Thailand, THONGTEM T. ,   Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, THONGTEM S. ,   Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Published: February 2023

BiOBr nanomaterials were successfully synthesized in different solutions with the pH of 2–12 by sonochemical method. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) results revealed the presence of pure tetragonal BiOBr nanomaterials. The photocatalytic activities of BiOBr nanomaterials were evaluated through the degradation of rhodamine B (RhB) under visible light irradiation. Clearly, the pH of precursor solution played an important role in photocatalytic activity. In this research, BiOBr flowers synthesized in a solution with the pH of 6 showed the highest photocatalytic efficiency of 99.05 % within 40 min.
CHARACTERIZATION OF UV-LIGHT-DRIVEN Ag/BiOCl NANOPLATES SYNTHESIZED BY SONOCHEMICAL DEPOSITION METHOD
Authors:   Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand, PHURUANGRAT A. , DUMRONGROJTHANATH P. ,   Rajamangala University of Technology Lanna Chiang Rai, Chiang Rai 57120, Thailand, KUNTALUE B. ,   Electron Microscopy Research and Service Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, THONGTEM S. ,   Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, THONGTEM T. ,   Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Published: February 2023

In this study, a facile strategy for the fabrication of Ag/BiOCl nanoplates for photodegradation of methylene blue (MB) under UV light irradiation is reported. BiOCl nanoplates were synthesized by simple hydrothermal method. Ag nanoparticles were deposited on BiOCl nanoplates in ethylene glycol as a solvent by sonochemical method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and X-ray photoelectron spectroscopy (XPS). The results showed that cubic Ag nanoparticles were uniformly deposited on tetragonal BiOCl nanoplates. The Ag/BiOCl heterostructures showed significantly enhanced photocatalytic performance in the degradation of methylene blue (MB) comparing with the BiOCl nanoplates. The observed degradation of MB over 10 wt% Ag/BiOCl photocatalyst was 0.011 min–1 which is 4.58 times of that over pure BiOCl nanoplates.
EFFECT OF CYCLE COUNT IN SILAR DEPOSITION OF COUNTER ELECTRODE ON THE PERFORMANCE OF QUATERNARY QUANTUM DOT SENSITIZED SOLAR CELL
Authors:   Centre for Nano Science and Technology, Panjab University Chandigarh 160014, India, SINGH N. , SHARMA J. ,   Centre for Nano Science and Technology, Panjab University Chandigarh 160014, India, TRIPATHI S. K. ,   Centre for Nano Science and Technology, Panjab University Chandigarh 160014, India
Published: February 2023

Cu-Ni-S alloyed films of different thicknesses were prepared by varying the number of cycles in SILAR deposition and were used for the application as Counter Electrode in QDSSCs. For device fabrication, titanium dioxide films were used as a photo-anode layer, Cu2ZnSnS4 quaternary quantum dots as a sensitizer, and polysulfide electrolyte was used as Redox mediator. The effect of number of SILAR cycles on the electrical and electrochemical parameters was studied with V-I characteristic curve and electrochemical impedance spectroscopy. The device incorporating counter electrode deposited by 10 SILAR cycles performed best among other devices because of its lowest impedance parameters.
EFFECT OF HOLDING TIME DURING SINTERING ON DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF 0.96KNN-0.04 LiSbO3 CERAMICS
Authors:   Marine Engineering Department, Tianjin Maritime College, Tianjin 300350, China, WANG R. , LI Y. ,   Analysis and Testing Research Centre, North China University of Science and Technology, Tangshan 063210, China, TIAN Y. ,   Analysis and Testing Research Centre, North China University of Science and Technology, Tangshan 063210, China, LI Z. ,   Chemical College, Shijiazhuang University, Shijiazhuang 050035, China
Published: February 2023

K2CO3, Na2CO3, Li2CO3, Sb2O3 and Nb2O5 were used as the starting materials, the 0.96(Na0.5K0.5)NbO3-0.04LiSbO3 ceramics are prepared using solid state synthesis method, and effects of holding time during sintering on dielectric and piezoelectric properties of 0.96KNN-0.04 LiSbO3 ceramics are investigated. The crystal structure was detected using X-ray diffraction characterization, and the micrographs were observed by field emission scanning electron microscopy. The results show that the crystal structure for 0.96KNN-0.04 LiSbO3 ceramics with different holding time is all perovskite structure, with the extension of holding time, the proportion of the two diffraction peaks decreases gradually, and presents the trend of gradually merging into a single peak. With the extension of the holding time, the relative dielectric constant increases first and then decreases, reaching the maximum value of 1015 at 5 h. With the increase of holding time, the Curie temperature Tc moves to high temperature, Tc rises from 295 oC to 350 oC, at the same time, the dielectric constant at Curie point reaches 4869 when the holding time is 5 h. Afterwards, the piezoelectric constant increases first and then decreases with the increase of holding time, and the holding time is 5 h, d33 = 147 pC/N, reaching the maximum value. So the dielectric and piezoelectric properties of 0.96KNN-0.04 LiSbO3 ceramics are optimized when the holding time is 5 h.
IMMOBILIZATION OF A QUARTERIZED POLYMERWITH IMMOBILIZED TRANSITION METAL IONS
Authors:   Institute of Catalysis and Inorganic Chemistry named by academician of M.Nagiev, ANAS, TAGIEV D. , MAMMADOVA U. ,   Institute of Catalysis and Inorganic Chemistry named by academician of M.Nagiev, ANAS, ISAZADE A. ,   Institute of Catalysis and Inorganic Chemistry named by academician of M.Nagiev, ANAS, ZEYNALOV N ,   Institute of Catalysis and Inorganic Chemistry named by academician of M.Nagiev, ANAS, BADALOVA O. ,   Institute of Catalysis and Inorganic Chemistry named by academician of M.Nagiev, ANAS, SHIXVERDIEVA N. ,   Institute of Catalysis and Inorganic Chemistry named by academician of M.Nagiev, ANAS, SEIDOVA C. ,   Institute of Catalysis and Inorganic Chemistry named by academician of M.Nagiev, ANAS, ASLANOVA H. ,   Institute of Catalysis and Inorganic Chemistry named by academician of M.Nagiev, ANAS
Published: February 2023

Poly-4-vinylpyridine was almost quantitatively quaternized with benzyl chloride in an aqueous ethanol solution, followed by crosslinking before and after immobilization with transition metal ions (Ni, Mn). The obtained samples were studied by physicochemical methods (scanning electron microscope (SEM), x-ray phase (XPA), infrared spectroscopy (IR) analysis. The aim is to use quaternized, cross-linked and immobilized samples as an effective sorbents and catalysts in many chemical processes.
SIMULATION AND FABRICATION OF Ag/ZnO-NANORODS/Ag ULTRAVIOLET DETECTORS ON p-TYPE SILICON
Authors:   Department of Electronic Engineering, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do, South Korea, KUMAR M. , SINGH S. ,   Department of Electronic Engineering, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do, South Korea, TIWARI P. K. ,   Department of Electrical Engineering, Indian Institute of Technology, Patna, India, PARK S.H ,   Department of Electronic Engineering, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do, South Korea
Published: February 2023

Hydrothermal method was successfully utilized to grow ZnO-nanorods on p-type silicon substrate. The highly dense grown ZnO-nanorods are well-aligned, and perpendicularly to substrate confirmed by scanning electron microscopy. The X-ray diffraction analysis confirmed that the [002] orientation was the major growth direction of the ZnO nanorods. A shadow masks have used to fabricate Metal–semiconductor–metal (MSM) structure. Three arrays of Ag interdigitated electrodes were then deposited onto the ZnO-nanorod/Si substrates. The current characteristics of [Ag/ZnO-nanorod/Ag]/Si devices were investigated range of -2 to +2 V. The as-fabricated devices showed a contrast ratio (i.e., the photocurrent/dark current) of 1.17 along with room temperature 0.115 mA/W responsivity at 365 nm and -2 V. A simulation analysis for the theoretical MSM structure has also been done in this work. A Visual TCAD was also used to simulate this device. A comparative study of experimentally and theoretically obtained results was also carried out and both results were found in good agreement of each other.
TERNARY FLAME RETARDANT SYSTEM OF AMMONIUM POLYPHOSPHATE-DIATOMITE-NANO-SiO2 AND ITS APPLICATION IN FIBROUS MATERIALS
Authors:   School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, 310023, China, ZHANG X.J. , ZHAO H.F. ,   School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, 310023, China, SHA L.Z. ,   School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, 310023, China, LI J. ,   School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, 310023, China, LI Y ,   School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, 310023, China, MA C. ,   School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, 310023, China, HU H.W ,   School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, 310023, China
Published: February 2023

Ternary composite flame retardantswereprepared via in-situpolymerization of ammonium polyphosphate (APP)-diatomite (DE)-nano-SiO2and were used for the improvement of flame retardance and smoke suppression of paper fibrous materials. Thermogravimetric analysis (TGA), limiting oxygen index (LOI), cone calorimeter test (CCT) and scanning electron microscope (SEM)were used to evaluate the thermal stability of the composite flame retardants andthe flame retardance and smoke suppression of paper loading the flame retardants. Results show that the LOI value of paper loading 20% APP-DE-2%nano-SiO2 reached 26.7%, which was higher than that of paper loading the same dose of the ternary compositefillers. The addition of nano-SiO2reduced the mass loss of the composite filler at high temperature and promoted the condensed phase flame retardation of the paper loading the composite filler. The existence of nano-SiO2reduced the heat release rate (HRR) and rate of smoke release (RSR) of paper sample, thereby improving the flame retardance and smoke suppression of fibrous materials.
Porous silicon (p-type) prepared by electrochemical etching and study of structure and morphology properties and effect of neutron irradiation
Authors:   Department of Physics, College of Science, Mosul University, Iraq, Sulaimana A. A. , Alyas M. M. ,   Department of Physics, College of Science, Mosul University, Iraq, Muhammed A. M. ,   Sumy State university Technical , Sumy, Ukraine
Published: February 2023

The research of electrochemical cell (ECE) for etching time ( 10 , 20 and 30 min. ) of the porous silicon (p-type) was fabricated by. This techniques and study at room temperature the irradiated by using neutron with flux density up 1012 cm-2 s -1 of high energy. The crystallographic structure and morphological properties of P-Si were investegated by X-ray diffraction (XRD) and Scanning electron microscope techniques before and after irradiation. The experimental results of X-ray reveal that P-Si layer still in crystallize phase and nano range. The morphological properties (Top surface and cross section) of P-Si layer were investigated by field emission Scanning electron microscope (FESEM) technique, these images illustrate that the pores diameter increase with height etching time. Finally , these results enhanced of the P-Si substrate after the irradiation. The effect of irradiation were best of structure of P-Si.
Effect of indium content on structural stability of Sn-inbinary alloys by first-principles calculation
Authors:   School of Science, Shenyang Ligong University, Shenyang 110159, China, Wang J. J. , Wang X. ,   School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China, Du X. M. ,   School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China, Chi Y. ,   Party School of Liaoning Provincial Party Committee, Shenyang 110004, China
Published: February 2023

Structural, electronic properties of the SnxIn(16-x) (x=7, 8, 9, 10, 12, 13, 14, 15) solid solution alloys with tetragonal structure were investigated by means of first-principles calculations within the framework of density functional theory. The results of enthalpies of formation and cohesive energy show that the stability of the alloys increases with the decrease of the content In element. The electronic structure was further investigated to understand the underlying mechanism of the structural stability of the SnxIn(16-x) alloys. SnxIn(16-x) alloys exhibit a mixture characteristic of metallic and covalent bonding. A small quantity of In atoms in SnxIn(16-x) alloys may improve significantly structural stability of alloys.
The hydrogen bonding characteristic of (H2O)n (n=14-17)：quantum theory of atoms in molecules
Authors:   Faculty of science, Xi’an Aeronautical University, Xi’an, 710077, China, Yang H. H. , Jin F. C. ,   Faculty of science, Xi’an Aeronautical University, Xi’an, 710077, China, Wei L. M. ,   Faculty of science, Xi’an Aeronautical University, Xi’an, 710077, China
Published: February 2023

The hydrogen bonding characteristics of water clusters (H2O)n (n=14-17) are investigated by using Quantum Theory of Atoms in Molecules (QTAIM). The stabilities of the water clusters are related to the strength and number of hydrogen bonding. The strength of hydrogen bonding is primarily concerned with the characteristic of the donor molecule. The electron densities of bonding critical points of hydrogen bonding formed by DAA, DDAA and DDA molecule as hydrogen-donor (H-donor) are about 0.045 a.u., 0.035 a.u. and 0.025 a.u. respectively. The strength of hydrogen bonding formed by DAA as H-donor is the strongest, and that formed by DDA as H-donor is the weakest. The strength of hydrogen bonding in pentagonal rings is stronger than that in the cubes.
Reaction mechanism comparison of AlSi-polyester and aluminum bronze/polyester plasma spraying
Authors:   School of Mechanical & Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China, Ju C. , Li Q. ,   School of Material Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China, Wang Z. L. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China, Song Q. H. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China, Li J. J. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China, Sun Z. P. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China, Zhang Y. F. ,   School of Mechanical & Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
Published: February 2023

AlSi-polyester seal coatings and aluminum bronze/polyester seal coatings prepared by plasma spraying were used to study their reaction mechanism. The composition of AlSi-polylester and aluminum bronze/polyester powders and coatings were investigated by X-ray diffraction. The powders were analyzed by thermogravimetric differential thermal analysis and scanning electron microscopy. Comparing the powder with the coating, it is found that they have the same phase by X-ray diffraction. Thermogravimetric differential thermal analysis of the powders show that the service temperature should not exceed 500oC, otherwise the polyester constituent begins to degrade. It is also found that the aluminum bronze/polyester seal coatings have a lower porosity than the AlSi-polyester seal coatings.
Fabrication of Fe2CuO4 nanoparticles via photolysis technique for improved performance in dye-sensitized solar cells
Authors:   Department of Chemistry, College of Science, Mustansiriyah University, Baghdad, Iraq, Kamil A. F. , Abdullah H. I. ,   Department of Chemistry, College of Science, Mustansiriyah University, Baghdad, Iraq, Rheima A. M. ,   Department of Chemistry, College of Science, University of Wasit, kut, Iraq, Mohammed S. H. ,   Department of Chemistry, College of education, University of Garmian, kalar, Iraq, Tumaa S. J. ,   Department of Chemistry, College of Science, University of Wasit, kut, Iraq, Abed R. M. ,   Department of Chemistry, College of Science, University of Wasit, kut, Iraq
Published: February 2023

This paper created excellent photo-anode materials based on Fe2CuO4 Nanoparticles to efficiently convert the photoelectric into a dye-sensitized solar cell (DSSC). The Fe2CuO4 nanoparticles were prepared via the UV-Irradiation method. The synthesized nanoparticles morphology structure and optical properties were examined using various X-ray diffraction (XRD), Energy Dispersive X-Ray Analysis (EDX) / mapping, field emission scanning electron microscope (FE-SEM), Transmission Electron Microscopy (TEM), and photoluminescence spectroscopy (PL) are examples of these techniques. Transmission electron microscopes (TEM) images validated the Field emission scanning electron microscopy (FE-SEM) and crystal structure of the generated Fe2CuO4 NPs, which had an average particle size of (11.7 nm), and the X-ray diffraction analysis (XRD) investigation indicated no impurity peaks. Photoluminescence spectroscopy (PL) was used to examine the optical characteristics, and the energy gap was found to be 1.95 eV. Nano-powder has been used to develop a successful photo-sensitizing solar cell employing cibacron brilliant red b as a photosensitizer with an efficiency of about 6.47 to 10.39 % energy conversion. We have created a time-saving technology that is simple to regulate, which makes it possible to produce nano-particulate composites without a high testing need. Our findings could investigate an opportunity for nanomaterials to be synthesized with highly rapid answers and now photoanode.
Enhanced antibacterial activity of selenium nanoparticles prepared by cold plasma in liquid
Authors:   Dept. of Remote sensing and Geographic information systems, College of Science, University of Baghdad, Niema A. A. R. , Abbas E. M. ,   DijlahUniversity College, Abdalameer N. Kh. ,   cDept. of Physics, College of Science for Women, University of Baghdad
Published: February 2023

In this study, selenium Nanoparticles were synthesized using selenium nitrate in a physical way (using cold plasma produced under normal atmospheric pressure) operating on alternating current AC with a voltage of (13) kV. Its frequency is (23) kHz, and the speed of the Argon gas flow is (3) L/min with an exposure time of 3 min. Selenium Nanoparticles were prepared in four different concentrations (0.2, 0.4, 0.6, and 0.8 ) mM, then the selenium Nanoparticles were characterized by UV-VIS spectroscopy, where (absorption, transmittance, absorption coefficient, energy gap) were measured for all concentrations where it was observed The absorbance increased with the increase in the concentration of the material, while the permeability decreased. The energy gap was at the lowest concentration, 1.74 electron volts. With the increase in concentration, it was noticed that the energy gap decreases, and this is due to the transformation of the material to the nanoscale. Nanoparticle characteristics have been investigated (XRD, AFM, FESEM, and UV-Vis). The biological activity of selenium Nanoparticles was tested by the method of diffusion in the medium towards Gram-positive bacteria Klebsiella Pneumoniae and Gram-negative Staphylococcus. aureus, where the highest inhibition rate was recorded for Gram-negative bacteria, reaching (31, 30, 20, 22) mm, respectively, in the case of bacteria. The positive amount reached (29, 24, 24 20) mm, respectively, where it was noticed that the concentration of the substance increased, the rate of the inhibition diameter increased.
Production of biodegradable Mg-based alloys by mechanical alloying
Authors:   Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, México, Gonzaga S. R. , Sedano A. ,   Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, México, Colín J. M. ,   Facultad de Ciencias Químicas e Ingeniería, UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, México, Torres-Islas A. ,   Facultad de Ciencias Químicas e Ingeniería, UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, México, Molina-Ocampo A. ,   Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, México
Published: February 2023

Mg has several attractive characteristics that make Mg-based materials potentially used for bio-engineering applications. In this work, a ternary Mg-Zn-Ca alloy was manufactured using low energy mechanical alloying (MA) followed by a sintering process under a controlled atmosphere. The aim of this work was to study the effect of milling time on ternary magnesium-zinc-calcium (Mg-Zn-Ca) alloys produced by mechanical alloying. The Mg base alloys were synthesized in a planetary ball mill under an argon atmosphere using stainless steel containers and balls with a milling regimen of 400 rpm for 2, 5 and 10 hours. The alloyed powders obtained by MA at different milling times were characterized by Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD). These results suggest that Mg65Zn30Ca5 and Mg70Zn25Ca5 alloys can be synthesized by mechanical alloying.
Analisis SWOT Mobile Dictionary Pleco dan Hanping Lite
Authors: Rahayu Pravita , Anggraeni Anggraeni
Published: February 2023

Penelitian berjudul â€œAnalisis SWOT Mobile Dictionary Pleco dan Hanping Liteâ€ dirancang sebagai pedoman pengguna untuk menentukan Mobile Dictionary yang sesuai dengan kebutuhan dan bertujuan untuk mengetahui analisis SWOT pada Mobile Dictionary Pleco dan Hanping Lite yaitu (1) mengetahui Kekuatan dari Mobile Dictionary Pleco dan Hanping Lite, (2) mengetahui Kelemahan dari Mobile Dictionary Pleco dan Hanping Lite (3) mengetahui Peluang dari Mobile Dictionary Pleco dan Hanping Lite (4) mengetahui Ancaman dari Mobile Dictionary Pleco dan Hanping Lite. Penelitian ini menggunakan deskripsi kualitatif metode observasi, studi dokumentasi dan wawancara dengan tiga tahapan, yaitu (1) potensi dan masalah, (2) pengumpulan data, (3) Analisis SWOT. Hasil analisis SWOT menunjukkan bahwa meskipun Mobile Dictionary Pleco dan Hanping lite adalah kamus sejenis, kedua aplikasi Mobile Dictionary ini memiliki kelebihan dan kekurangan masing-masing.Thesis entitled â€œSWOT Analysis of Mobile Dictionary Pleco and Hanping Liteâ€ compiled as a guideline for users to determine which mobile dictionary according to their needs and has the aim to view the SWOT analysis on a mobile dictionary pleco and hanping lite, specifically (1) knowing the strength of mobile dictionary pleco and hanpling lite, (2) knowing the weakness of mobile dictionary pleco and hanping lite, (3) knowing the opportunity of mobile dictionary pleco and hanping lite, (4) knowing the threats of mobile dictionary pleco and hanping lite. The method used in this research is descriptive qualitative, research using documentation and interview with three steps, (1) potency and problem, (2) collecting data, (3) analysis SWOT. The result from the SWOT analysis shows that even though mobile dictionary pleco and hanping lite are similar dictionaries, the two applications have their respective advantages and disadvantages.
PENGEMBANGAN BUKU PELENGKAP SEJARAH DINASTI HAN DALAM KOMIK BERBASIS KARAKTER HUMANIS
Authors: Sholekhah Hanif Zulfahmi , Anggraeni Anggraeni
Published: February 2023

Penelitian ini berupaya mengembangkan buku pelengkap sejarah Dinasti Han dalam komik berbasis karakter humanis, sehingga dapat meningkatkan ketertarikan mahasiswa dalam mempelajari sejarah Dinasti Han. Tujuan dari penelitian ini yaitu: 1) menganalisis kebutuhan terhadap buku pelengkap sejarah Dinasti Han dalam komik berbasis karakter humanis pada mata kuliah zhÅng guÃ³ lÃ¬ shÇ, 2) mendeskripsikan prototipe buku pelengkap sejarah Dinasti Han dalam komik berbasis karakter humanis pada mata kuliah zhÅng guÃ³ lÃ¬ shÇ, 3) mengetahui validasi ahli terhadap buku pelengkap sejarah Dinasti Han dalam komik berbasis karakter humanis pada mata kuliah zhÅng guÃ³ lÃ¬ shÇ. Penelitian ini menggunakan metode Research and Development (RD). Penelitian ini mengembangkan buku pelengkap sejarah Dinasti Han dalam komik berbasis karakter humanis. Hasil penelitian menyimpulkan bahwa media komik layak digunakan dalam pembelajaran mata kuliah zhÅng guÃ³ lÃ¬ shÇ. Kelayakan media komik ditunjukan dengan hasil nilai rata-rata validasi produk dari ahli materi mendapatkan nilai 83,1 yang termasuk dalam skor 3 dengan rentang nilai 71-85 kategori layak. Dan hasil nilai rata-rata validasi produk ahli media mendapatkan nilai 88,5 yang termasuk dalam skor 4 dengan rentang nilai 86-100 kategori sangat layak. Media kemudian diperbaiki sesuai saran perbaikan yang diberikan para ahli pada aspek-aspek tertentu.this study seeks to develop a complementary book on the history of the Han Dynasty in comics based on humanist characters, so as to increase student interest in studying the history of the Han Dynasty. The objectives of this study are: 1) to analyze the need for a complementary book on the history of the Han Dynasty in comics based on humanist characters in the zhÅngguÃ³ lÃ¬shÇ course, 2) to describe the prototype of a complementary book on the history of the Han dynasty in comics based on humanist characters in the zhÅngguÃ³ lÃ¬shÇ course , 3) knowing expert validation of the complementary books on the history of the Han Dynasty in comics based on humanist characters in the zhÅngguÃ³ lÃ¬shÇ course. This research uses the Research and Development (RD) method. This study develops complementary books on the history of the Han Dynasty in the form of comics based on humanist characters.T he results of the study concluded that comic media is suitable for use in learning zhÅngguÃ³ lÃ¬shÇ courses. The feasibility of comic media is shown by the results of the average value of product validation from the material experts get a value of 83.1 which is included in the score 3 with a range of values 71-85 feasible categories. And the results of the average value of the validation of the media expert product get a value of 88.5 which is included in the score 4 with a range of values from 86 to 100 categories is very feasible. The media is then repaired according to the suggestions given by experts on certain aspects.
Pengembangan Modul Audio Visual Berdasarkan Film â€œ20 Once Againâ€ Untuk Pembelajar Bahasa Mandarin Tingkat Menengah.
Authors: Kusumawati Rizky , Anggraeni Anggraeni
Published: February 2023

Berdasarkan hasil observasi ditemukan permasalahan pembelajaran dalam Bahasa Mandarin yaitu rasa ketidaktertarikan, sulit memahami kosakata, permasalahan berbicara juga mendengar audio Bahasa Mandarin. Berdasarkan latar belakang tersebut, peneliti mencoba mengembangkan sebuah media pembelajaran dalam bentuk modul audio visual berbasis film. Tujuan dari penelitian ini adalah untuk (1) menganalisis kebutuhan mahasiswa dan dosen terhadap modul audio visual berdasarkan media film media film,(2) mendeskripsikan prototype modul audio visual berdasarkan media film, (3) menjelaskan tata cara validasi ahli terhadap modul audio visual berdasarkan media film. Penelitian ini merupakan penelitian pengembangan. Penelitian menggunakan jenis penelitian deskriptif kualitatif dengan metode analitis Bogdan dan Taylor dalam Moleong. Hasil penelitian modul audio visual berdasarkan film â€œ 20 Once Again â€untuk pembelajar Bahasa Mandarin tingkat menengah dikembangkan dengan kualitas sangat baik dan layak untuk digunakan dalam pembelajaran Bahasa Mandarin. Hal itu ditunjukkan dengan masing- masing nilai yang diberikan validator yang menilai aspek kelayakan isi ( materi ) 86,7 kategori sangat layak, aspek kegrafikan ( desain ) 86,9 kategori sangat layak, aspek kelayakan penyajian ( Bahasa ) 86,7 kategori layak.Based on the results of observations, it was found that learning problems in Mandarin were disinterest, difficulty understanding vocabulary, speaking problems as well as hearing Mandarin audio. Based on this background, the researcher tries to develop a learning media in the form of a film-based audio visual module The purpose of this study was to (1) analyze the needs of students and lecturers for an audio visual module based on film media film media, (2) describe the audio visual module prototype based on film media, (3) explain the expert validation procedures for an audio visual module based on media film.This research uses descriptive qualitative research with the analytical method of Bogdan and Taylor in Moleong.. The results of the research on the audio-visual module based on the film "20 Once Again " for intermediate level Mandarin learners were developed with very good quality and suitable for use in Mandarin learning. This is indicated by each value given by the validator which assesses the feasibility of the content (material) 86.7 with a very feasible category , the graphic aspect (design) 86.9 with the very feasible category , the presentation feasibility aspect (language) 85.7 with a decent category.Â  .
Empathy Expression in Interpreted and Noninterpreted Care Conferences of Seriously Ill Children
Authors: Olszewski Aleksandra E. , Bogetz Jori , Mercer Amanda , Bradford Miranda C. , Scott Maya , Fields Blanca , Williams Kelli , Rosenberg Abby R. , Trowbridge Amy
Published: February 2023

BACKGROUND AND OBJECTIVES

Clinician empathy is associated with improved communication and clinical outcomes. We hypothesized that, when clinicians express empathy, families are more likely to deepen discussions, and that clinicians express less empathy in care conferences with language interpretation.

METHODS

Prospective, mixed methods cohort study of English and interpreted audio-recorded transcripts of care conferences for pediatric patients with serious illness hospitalized at a single urban, quaternary medical institution between January 2018 and January 2021. Directed content analysis identified empathic opportunities, clinician empathetic statements or missed opportunities, and family responses. Clinician empathic statements were “buried” if immediately followed by more clinician medical talk. Descriptive analyses summarized demographics and codes. χ2 analyses summarized differences among language interpretation and family responses.

RESULTS

Twenty-nine patient–family dyads participated. Twenty-two (81%) family members were female. Eleven (39%) used language interpretation (8 Spanish, 2 Vietnamese, 1 Somali). Families created 210 empathic opportunities. Clinicians responded with unburied empathy 80 times (38%, no differences for English versus interpreted care conferences, P = .88). When clinicians buried empathy or missed empathic opportunities, families responded with alliance (agreement, gratitude, or emotional deepening) 14% and 15% of the time, respectively. When clinicians responded with unburied empathy, families responded with alliance 83% of the time (P < .01).

CONCLUSIONS

Our study suggests that clinician empathic expression does not differ when language interpretation is used in pediatric care conferences. Clinicians often miss opportunities to express empathy, or they bury it by medical talk. Although unburied empathy created opportunities for relationship-building and family-sharing, buried empathy negatively impacted these domains similarly to no empathic expression.
Detección con feromonas de Duponchelia fovealis Zeller en fincas freseras de Costa Rica
Authors: Gonzalez-Fuentes Francisco , Rodríguez-Chinchilla Carlos , Arroyo-Vargas Abelardo Jesús , González-Herrera Allan
Published: February 2023

Introducción. Duponchelia fovealis Z. es una plaga en la producción de cultivos en el continente europeo y en Estados Unidos. Ha sido detectada en producción fresera en Brasil, México y en una finca en el Cantón de Vásquez de Coronado, en San José, Costa Rica. Objetivo. Determinar la presencia y distribución de Duponchelia fovealis Z. en fincas freseras de Costa Rica. Materiales y métodos. Durante las épocas secas del 2020-2021 y 2021-2022, trampas cebadas con la feromona de D. fovealis fueron colocadas en la finca del reporte inicial en Vásquez de Coronado y en otras seis fincas localizadas en las principales regiones freseras de Costa Rica: La Cima de Dota, Llano Grande, Poás y Vara Blanca. Resultados. El monitoreo demostró que las poblaciones más altas estuvieron establecidas en la finca de Vásquez de Coronado, mientras que se obtuvieron capturas ocasionales en fincas como en La Cima de Dota en San José y dos en Llano Grande de Cartago. Conclusiones. Se determinó la presencia de D. fovealis Z. en Costa Rica, con distribución limitada. Ante esto se sugiere un análisis de riesgo de la plaga y la implementación de medidas que disminuyan la dispersión del insecto.
Hybrid MDA-ANFIS approach based control of grid connected solar system with nine level inverter wind energy conversion
Authors: Apparao A. , Chandra Sekhar G.
Published: February 2023

A hybrid approach is proposed in this paper to achieve the load power requirement for grid connected hybrid photovoltaic wind system. The proposed approach is the combined execution of both the Modified Dragonfly Algorithm (MDA) and Adaptive Neuro-Fuzzy Interference System (ANFIS), hence it is called MDA-ANFIS. ANFIS approach is improved by the MDA approach to minimize the error functions. The main aim of the proposed approach is satisfying the load power requirement and obtains the maximum energy from the hybrid wind solar system. Through the modelling of operating modes of generation units, the proposed approach determines the switching states of the inverter. The MDA approach is utilized to generate the dataset and the data set is processed by ANFIS, which creates the control signal. By using the proposed approach, it was possible to minimize the system parameter radiation, external disturbances as well as optimally fulfill the load demand. The proposed method is activated in MATLAB/Simulink platform, and its performance is compared with existing methods.