bluuebunny/crossref_metadata_2025_split huggingface dataset:
ML-based Telegram bot for real estate price prediction
Authors: Salem Hamza , Mazzara Manuel 
Published: December 2020

Abstract
Telegram chatbots are one of the main sections in Telegram applications that get more attention and provide huge business opportunities for companies nowadays. Also, Machine learning algorithms have been used in numerous fields and industries and one of the main growing markets is real estate. It is already helping real estate agents to respond more quickly to clients’ questions and develop landing pages that fit customers’ needs. However, one of the main time-consuming stages for a real estate agent is the process of answering questions about price per location and knowing which locations clients are interested in. In order to solve these problems, we have built a telegram chatbot to answer customers of any real estate agent with the price of a real estate property based on their current Geolocation. This bot can predict the price of a real estate property using room numbers, Geolocation, and surface area in square meters. These are the inputs for machine learning algorithms to give an approximate price. The bot can predict based on the source of the data-set, for example, we have collected our data from classified ads website for real estate in Amman, Jordan. We have used python and web scraping library for data extraction, cleaning, and transformation. As a result, by using Geolocation we have increased the model accuracy to 1.3X and our bot can be replicated in any markets based on the dataset. We believe our work can be taken to different markets and make real estate agent’s job easy and more profitable by changing leads to potential customers thought answering their questions.
A new method for creating nanoprofiled epitaxial silicon carbide surfaces on silicon
Authors: Grashchenko A. S. , Kukushkin S. A. , Osipov A. V. 
Published: December 2020

Abstract
In the presented work, the method of substitution of atoms was used to form an epitaxial nanostructured profiled SiC layer with a given geometry on a Si crystal. The found conditions for the synthesis of the SiC layer with the initial geometry and morphology of the Si surface preserve the initial state, covering layered SiC, completely repeating the profile of the initial Si surface.
Synthesis of mixed germanium tin nanoparticles by spark-discharge
Authors: Lizunova A A , Borisov V I , Masnaviev B I , Solovey V R , Ivanov V V 
Published: December 2020

Abstract
The paper represents the investigations of dimensional and structural properties of nanoparticles produced by pulsed-periodic spark discharge by simultaneous electrical erosion of germanium and tin electrodes in inert atmosphere. Two alloys of GeSn nanoparticles with different mass fractions of tin were obtained by altering the polarity of the electrodes. The nanoparticles’ sizes from 4 to 45 nm were observed. It was shown that the samples consist of core-shell nanoparticles agglomerates, where both β-tin crystals and cubic germanium ones presence as a core; the shell is a mixed germanium tin oxide. Furthermore, a shift of a maximum of Raman peak by 3.5 cm−1 to lower wave numbers with an increase in relative fraction of tin was detected.
Study of droplet formation regimes in a pressure control mode in microfluidic chip for screening cell libraries
Authors: Filatov N A , Bukatin A S 
Published: December 2020

Abstract
To create a high throughput system for screening single cells in “water-in-oil” droplets, a key role is played by the method of controlling fluid flows in a microfluidic droplet generator. This is due to the fact that it is required to obtain monodisperse drops-microcapsules, place cells in them and be able to manipulate them. For these purposes, not only systems based on syringe pumps are suitable, but also pressure control units may be used. Unfortunately, pressure control instruments on the market for researchers are represented by only a few companies and are quite expensive. In this work, we develop a homemade microfluidic pressure controller based on SMC ITV 0010 pneumatic regulators and show its operability. Also, we investigated the conditions for reproducible generation of water-in-oil emulsions in a microfluidic flow focusing droplet generator by pressure driven fluid flows.
The influence of quantum well geometry on wavelength of AlInGaAs/InP laser diodes
Authors: Chelny A , Akhmerov Yu , Savchuk A , Zharkova A , Rabinovich O , Mezhenny M , Aluyev A , Zakusov M , Orlova M , Murashev V , Didenko S 
Published: December 2020

Abstract
The AlGaInAs structure was successfully grown on the InP substrate by MOCVD method. The active region was studied by Auger spectroscopy. The thicknesses and compositions of the quantum wells did not coincide with the theoretical ones. The mathematical model which correlate with investigation results is proposed.
Long–range night vision camera based on SWIR photocathode
Authors: Smirnov K J , Davydov V V , Glinushkin A P 
Published: December 2020

Abstract
Technological aspects of manufacturing SWIR sensitive detector on the basis of InP/InGaAs/InP photocathode and electron-bombarded CCD are given. Scheme of the digital camera for long distance detection is represented. SWIR camera operating mode and properties in case of implementation of impulse laser source are discussed.
Formation and SERS efficiency of periodic metal-dielectric nanostructures
Authors: Gangrskaia E , Babich E , Scherbak S , Reduto I , Redkov A , Lipovskii A 
Published: December 2020

Abstract
We studied silver nanoparticles combined with periodic gratings on a glass surface. The gratings were fabricated by selective etching of the glass slide patterned by thermal poling. The nanoparticles were grown on the bottom of the gratings’ grooves by out-diffusion technique. Obtained nanostructures supported both plasmonic and grating optical resonances and demonstrated SERS enhancement two times higher than one of the pure plasmonic structure.
Possibilities of using spectral analysis in method of nuclear magnetic spectroscopy for condensed media investigation
Authors: Makeev S S , Davydov V V , Grevtzeva A S , Glinushkin A P , Matorin D N 
Published: December 2020

Abstract
The necessity of developing a mathematical model for converting the recorded NMR signal using a modulation technique into the spectrum for conducting the composition of the medium under study is substantiated. A mathematical model has been developed to represent the NMR signal in the form of a spectrum, taking into account the features of its registration from condensed matter. Spectra of calculated and experimental NMR signals are presented. Them comparison are completed.
Modeling of current generation process in an aligned carbon nanotube under the action of strain gradient
Authors: Il’ina M V , Guryanov A V , Osotova O I , Blinov Yu F , Il’in O I 
Published: December 2020

Abstract
The results of theoretical and experimental studies of the current generation process in an aligned carbon nanotube (CNT) during its deformation are presented. It is theoretically established that there is a strain gradient equal to 8 in the aligned nanotube under the influence of the external field strength of 1010 V/m. The piezoelectric coefficient of the CNT at a diameter of 92 nm and a length of 2.2 µm is empirically determined and amounted to 0.107 C/m2. It is theoretically established that a CNT strain gradient of 8 leads to a current generation of up to 12 nA. It is shown that the modeling results correlate with experimental data. The obtained results can be used to develop the nanopiezotronics devices based on aligned carbon nanotubes.
Numerical study of Schottky diode based on single GaN NW on Si
Authors: Shugurov K Yu , Mozharov A M , Mukhin I S 
Published: December 2020

Abstract
Numerical modelling of Schottky diode formed by single GaN nanowire on Si substrate was performed. Two metals, namely, gold and platinum forming the Schottky barrier were considered. The potential barrier height was calculated taking into account occurrence of image force as well as Fermi level pinning at metal/semiconductor interface. Volt-ampere characteristics were obtained for different NW doping levels considering Wentzel–Kramers–Brillouin tunneling model. Cutoff frequencies are evaluated from current-time relaxation curves for different NW lengths and doping levels. It is shown that such diode structure demonstrates high-speed performance with cutoff frequency in the range from 0.1 to 0.9 THz for both studied metals.
Development and research of a technology for producing a low-dimensional porous platinum-based catalyst by thermal evaporation in vacuum on an ion-exchange polymer membrane of a hydrogen generator electrolytic cell
Authors: Nesterov S A , Gurin S A , Pecherskaya E A , Shelakhaev D A , Fimin A V 
Published: December 2020

Abstract
The use of hydrogen structures as a universal energy carrier led to its application in various fields of industry. Currently used production methodologies make it possible to produce systems with high reliability and a long service life. However, at the moment, the creation of such structures is limited by the lack of natural origin materials necessary for the production of such structures, which leads to the search for alternative and most universal manufacturing methods against the background of increasing needs.
Fabrication of NbN/SiNx:H/SiO2 membrane structures for study of heat conduction at low temperatures
Authors: Titova N A , Baeva E M , Kardakova A I , Goltsman G N 
Published: December 2020

Abstract
Here we report on the development of NbN/SiNx:H/SiO2-membrane structures for investigation of the thermal transport at low temperatures. Thin NbN films are known to be in the regime of a strong electron-phonon coupling, and one can assume that the phononic and electronic baths in the NbN are in local equilibrium. In such case, the cooling of the NbN-based devices strongly depends on acoustic matching to the substrate and substrate thermal characteristics. For the insulating membrane much thicker than the NbN film, our preliminary results demonstrate that the membrane serves as an additional channel for the thermal relaxation of the NbN sample. That implies a negligible role of thermal boundary resistance of the NbN-SiNx:H interface in comparison with the internal thermal resistance of the insulating membrane.
Formation of luminescent nanoclusters by etching silver nanoparticles with biomolecules
Authors: Chuiko Ya V , Kubenko V G , Reveguk Z V , Kapitionova M A , Kononov A I 
Published: December 2020

Abstract
Metal nanoparticles and nanoclusters are progressively studied for use in various biomedical applications such as imaging, drug delivery, and therapies. Therefore, considering the interaction of biopolymers with metal nanostructures becomes vital for their efficient application. Luminescent metal nanoclusters are now widely considered as potential sensor applications. In this work we considered the interaction of silver nanoparticles with some proteins and oligonucleotides. We observed that biomolecules in some cases can effectively dissolve nanoparticles and lead to the formation of silver nanoclusters.
Diffusive dynamics and jamming in ensembles of robots with variable friction
Authors: Rozenblit A D , Porvatov V A , Petrova D A , Khakhalin I S , Kotlyar K P , Gritsenko G Yu , Evreiskaya A A , Lebedeva M F , Kretov E I , Filonov D S , Souslov A , Olekhno N A 
Published: December 2020

Abstract
In the present paper, we experimentally study the diffusive dynamics in ensembles of self-propelled and self-rotating bristle-bots. Considering the dependence of the system dynamics on the packing density of robots as well as on the friction between individual robots, we show that the friction slightly affects the diffusive dynamics but leads to a significant change in the jamming transition corresponding to the formation of rigid clusters of robots.
Comment on ‘fluctuation-dominated phase ordering at a mixed order transition’
Authors: Godrèche Claude 
Published: December 2020

Abstract
Renewal processes generated by a power-law distribution of intervals with tail index less than unity are genuinely non-stationary. This issue is illustrated by a critical review of the recent paper by Barma, Majumdar and Mukamel (2019 J. Phys. A
52 254001), devoted to the investigation of the properties of a specific one-dimensional equilibrium spin system with long-range interactions. We explain why discarding the non-stationarity of the process underlying the model leads to an incorrect expression of the critical spin–spin correlation function, even when the system, subjected to periodic boundary conditions, is translation invariant.
Dielectric Breakdown Strength and Energy Storage Density of CCTO-ZBS Electroceramic
Authors: Saari Muhammad Qusyairie , Mohamed Julie Juliewatty , Sulaiman Muhammad Azwadi , Rahman Mohd Fariz Abd , Ahmad Zainal Arifin , Jamil Mohamad Kamarol Mohd , Rashid Mohd Warikh Abd , Yuwono Akhmad Herman 
Published: December 2020

Abstract
The effect of ZnO-B2O3-SiO2 (ZBS) glass additives to the microstructure and electrical properties of CaCu3Ti4Oi2 (CCTO) electroceramic has been successfully investigated in this research. CCTO and ZBS glass additives were prepared via solid state reaction and melt quench techniques, respectively. Raw materials of both CCTO and ZBS were wet mixed separately for 24 hours, dried overnight and the CCTO powder was calcined at 900 °C for 12 hours using an electrical carbolite furnace. After that, the ZBS powder was melted at 1400 °C for 2 hours using an elevator hearth furnace. The ZBS glass was grinded to form fine powder. Different weight percentages (0, 1, 3, 5, 7 and 10 wt%) of ZBS glass powder were added into CCTO (CCTO-ZBS powders), then the powders were wet mixed for 24 hours. The CCTO-ZBS mixtures were dried overnight, compacted at 300 MPa using hydraulic pressure of 6 to 9 mm diameter and 1 to 2 mm thickness (for dielectric properties test) and at 200 MPa of 50 mm diameter and 3 mm thickness (for dielectric breakdown strength test), then sintered at 1040 °C for 10 hours using an electrical carbolite furnace. The addition of a small amount of ZBS glass about 1 wt% was able to increase the dielectric constants (33.99%) and reduce the dielectric loss (5.14%) of CCTO measured at 1 MHz. This addition has also increased the relative density to the maximum value (95.90%), helped the formation of single phase of CCTO, increased the grain size (0.35%) and reduced the porosity as compared to pure CCTO. Meanwhile the dielectric breakdown strength (58.0%) and volumetric energy storage density (80.9%) has also improved with 7 wt% of ZBS glass addition.
Production and application of thermostable protease 50a as liquid protein stain remover
Authors: Ibrahim Noor Azlina , Ibrahim Normazzaliana , Lizawardi Nor Shaf Reena , Fauzi Nurul Fayyadhah Insyirah , Al-Amsyar Syed Muhammad 
Published: December 2020

Abstract
Proteases are important enzymes involved in many vital physiological processes and has wide potential for industrial applications. Previously, thermostable alkaline protease 50a was reported and had potential as laundry detergent additive and eco-friendly enzymatic dehairing of animal hides. Thus, exploration of this enzyme potentials’ need to be done in order to prove that it plays an important role in diverse industrial application. This study aimed to investigate the potential of the thermostable alkaline protease 50a as a protein stain remover. One formulation has been developed as liquid spray protein stain remover containing the enzyme and tested its ability to remove protein stain through washing performance. Four different types of fabric which were jersey, cotton, koshibo and crepe has been stained with blood as the protein source. Blood stain on the fabrics were then removed with four different solution; using distilled water only, distilled water with enzyme, formulated liquid spray with enzyme, and formulated liquid spray without enzyme. The formulated liquid spray with enzyme exhibited better removal bloodstains action by showing faintness of the blood stained on the fabrics after it was sprayed. The stains removal evaluation on different types of fabric with formulated liquid spray protein stain remover obtained are as followed order: crepe > jersey > cotton > koshibo. This study proved that the formulated liquid spray with addition of enzyme showed the most effective stain removal on crepe fabric.
Preliminary Investigation of Delamination Factor for Drilling Wood Plastic Composites (WPC)
Authors: Zuraik Muhammad Amirul , Sobri Sharizal Ahmad , Abdullah Nik Asmawie Nik , Hermawan Andi , Mohamed Mazlan , Shuaib Norshah Afizi 
Published: December 2020

Abstract
This study examines the effect of the delamination factor on wood composite drilling. Drilling is one of the most important machining operations in the manufacturing process, operating in a variety of ways to make life better every day. The preliminary experiment focuses on the implementation of three drilling strategies to determine the most appropriate for drilling composite and to identify the effect of the machining parameters of wood plastic composite (WPC) drilling. The CNC machining centre is used at the factory of the local company to assist them in the provision of certain production inputs. It is observed that the single step drill peck is the best suited strategy for drill WPC with less delamination at the entrance and exit holes compared to the other two methods, 2-peck and 4-peck drills. Hole tends to create a peel-up and to force the delamination down heavily along the hole edge when using the 4-peck process while the least peel-up pattern happens when using a single-step method. The findings also show a large amount of peel-up delamination as the feed rate increases. Therefore, the final results are also useful in understanding the relationship between the drilling parameters and the cutting experiments.
Study of Beta vulgaris (Beetroot) Extraction in Polar Solvents as Photoabsorber in Dye-Sensitized Solar Cells Application
Authors: Adenam Norfatihah Mohd , Pirdaus Nur Alfarina , Yunin Muhamad Yuzaini Azrai Mat , Azmie Ku , Wong Khairul Nizar Syazwan Wan Salihin , Adli Hasyiya Karimah , Salleh Hasiah 
Published: December 2020

Abstract
Over the last two centuries, energy needs have increased substantially until non-renewable resources nearly come to depletion. Therefore, the application of renewable energy resources like solar energy is absolutely appointed favorable due to its economical impact and improved technology. Dye-sensitized solar cell (DSSC) being the type of solar cell that utilize dye as light sensitizer for the operation and become the best alternative rather than toxic chemical dyes. Betalains is one of the pigment of natural dyes that can be extracted from fruit and vegetables which majorly available in beetroot (Beta vulgaris). To get the pigment for solar cell application, the optimum extraction is crucial. Hence, in this study, several polar solvents such as distilled water, methanol, ethanol, isopropanol, n-butanol, formic acid and acetic acid were used to extract betalain pigment from Beta vulgaris (BV). Then, several characterizations were carried out to analyze the photoabsorber properties using Ultraviolet-visible Spectroscopy (UV-Vis), Fourier-Transform Infrared Spectroscopy (FTIR), High Performance Liquid Chromatography (HPLC) and Scanning Electron Microscopy (SEM). The energy bandgap of BV in different solvents (ITO/TiO2/BV) are 2.19, 2.35, 2.65, 2.73, 2.78, 2.98 and 3.00 eV for methanol, n-butanol, formic acid, ethanol, acetic acid, water and isopropanol respectively. Whilst, FTIR spectrum shows the presence of functional group of O-H, C=O and C-O-C and HPLC analysis depicted the existence of betacyanin pigment all in samples. SEM images show the presence of porous structure of TiO2 and irregular pits formed due to the formation of BV layer on TiO2. In conclusion, overall findings suggested that methanol is the best solvent for extraction of betalain pigment, answering it has best photoabsorber properties among the sample series. Further detailed study is recommended to maximise the potential of Beta vulgaris pigment as photoabsorber in DSSC application.
Effects of Styrene Butadiene Rubber on Physical and Mechanical Properties of Kenaf Core Fiber Reinforced Polypropylene Composites
Authors: Mohd Siti Hajar , Bakar Mohamad Bashree Abu , Rosdi Nik Aida Hamizah Nik , Sabri Intan Najihah , Amini Mohamad Hazim Mohd , Nordin Razif Muhammed , Intapun Jutharat 
Published: December 2020

Abstract
In this research, the kenaf core fiber (KCF) reinforced polypropylene (PP) in the presence of styrene butadiene rubber (SBR) were melted blending with PP using Brabender internal mixer. The composites then fabricated using compression molding to form a sheet of PP and KCF reinforced PP (KCFPP) composites. Pure polypropylene (PP) matrix was used to serve as control whilst SBR was functionalized as impact modifier to improve the toughness properties of PP. The mechanical properties were determined by tensile test using Universal Testing Machine (UTM) according to ASTM D5803. The results show that the increment in SBR content has given an improvement in impact related properties (elongation at break) but at the expenses of strength and modulus properties.
Functional group Cinnamomum porrectum wood extractives by Fourier Transform Infrared
Authors: Omar Syazrol , Mhd Ramle Sitti Fatimah , Adenam Norfatihah Mohd , Mohammad Rawi Nurul Fazita , Che Zaudin Nurul Akmar , Abdul Hamid Zubaidah Aim , Ibrahim Nor Izaida 
Published: December 2020

Abstract
Extractive from Cinnamomum porrectum wood was obtained using Soxhlet extraction with five different types of solvent, which are distilled water, ethanol, acetone, chloroform, and benzene. From the result, ethanol extraction shows the highest extractives yield which are 2.692%, following by acetone (1.461%), chloroform (0.940%), benzene (0.109%) and distilled water (0.005%). Extractive make a major contribution to the characteristics of wood or non-wood species. These extractives are low-molecular weight compounds, and the different classes of extractives have different chemical behaviours. In this study, the FT-IR was used to analyse the extractive of the Cinnamomum porrectum wood with ethanol, distilled water, chloroform, benzene and acetone. From the result shows that, the analysis revealed 5 different types of functional group which are O-H stretching in presence of phenolic group, C-H stretching in presence of alkane group, C-F stretching in presence of alkyl halide group; C-O stretching in presence of aldehyde group and C=C stretching in presence of alkene group.
Effects on MAPP Compatibilizer on Mechanical Properties of Kenaf Core Fibre/Graphene Nanoplatelets reinforced Polypropylene Hybrid Composites
Authors: Sabri I.N. , Bakar M.B. Abu , Mohd S.H. , Rosdi N.A.H. Nik , Mohamed M. , Sulaiman M.A. , Masri M. N. , Chuangchote S. 
Published: December 2020

Abstract
Natural fibre has high potential to be used as reinforcement due to more save, greener and environmentally friendly compared to synthetic fibre. In this research, kenaf core fibre (KCF)-graphene nanoplatelets (GNP) reinforced polypropylene (PP) composites were melt blending using Brabender internal mixer and fabricated by compression moulding. This research aims to fabricate and study the effect of different amounts of MAPP on the mechanical properties of the PP/KCF/GNP composites. The difference amount of maleic anhydride grafted polypropylene (MAPP) as a compatibilizer in hybrid composite was added to enhance the mechanical properties by improving the interfacial adhesion of matrix and KCF. The pure polypropylene (PP) matrix was used as a control. The mechanical properties (tensile and flexural test) were determined using Universal Testing Machine (UTM). Overall, the results show that the presence of MAPP compatibilizer successfully enhanced the mechanical properties as a result of improvement of the fibre-matrix adhesion between the KCF and PP matrix.