bluuebunny/crossref_metadata_2025_split huggingface dataset:
Contact resistance and lifecycle of an ohmic MEMS switch with single and multiple contact bumps
Authors: Marukhin N V , Uvarov I V 
Published: December 2019

Abstract
Microelectromechanical systems (MEMS) switches potentially have a wide range of applications due to their promising characteristics, but relatively low reliability limits implementation of these devices. Contact region degrades during operation that increases the resistance and lowers the lifecycle. In this paper we demonstrate how these parameters can be enhanced by changing the design of the switch. The devices of four types having different number of contact bumps and beams are fabricated by surface micromachining and tested in a cold switching DC regime. The switch with two bumps has about 25% lower contact resistance and almost two times longer lifecycle than the one-bump device. Using four beams instead of one gives threefold increase of the lifecycle, but does not reduce the resistance significantly.
Microwave low mass-dimensional frequency standard on Hg- 199 ions
Authors: Lukashev N A , Davydov V V , Glinushkin A P , Yu Rud’ V , Lukyantsev V S 
Published: December 2019

Abstract
In the paper the design of a magnetic trap for low mass-dimensional microwave frequency standards is presented. The dependencies between the number of registered photons by PMT and magnetic field values are established. The new algorithm for optical processing is developed. The results comparison of experimental Allan deviation researches for different designs of microwave standard on 199Hg+ ions are performed.
Investigation of the piezoresistive properties and temperature coefficient of resistance of epitaxial GaN layers for applications in MEMS and thermal flow sensors
Authors: Kazakin A , Enns Y , Mizerov A , Kleimanov R , Bouravleuv A 
Published: December 2019

Abstract
The paper presents the results of an experimental determination of the piezoresistive gauge factor and temperature coefficient of resistance of a GaN films grown by molecular beam epitaxy on sapphire substrates. The measured values were used to calculate the design and characteristics of the GaN hot-wires anemometer for the MEMS gas flow sensor.
Contrast simulation in the phase shift dynamic magnetic force microscopy depending on the MFM probe geometry and materials
Authors: Zhukov M V , Belousov K I , Golubok A O 
Published: December 2019

Abstract
The gradient of the magnetic force caused by the interaction of various shapes magnetic nanoprobes with magnetic materials has been simulated. Because the force gradient is proportional to the phase shift in probe oscillations the data obtained allow us to compare the contrast of dynamic magnetic force microscopy images for probes with various shapes. A comparison of standard pyramidal probes and probes with cylinder-shaped nanowiskers with different aspect ratios has been carried out. The probes with optimal parameters such as the shape, the thickness and type of the magnetic coating giving the maximum phase shift and as a result giving the best quality visualization of magnetic fields on the sample surface in the phase shift mode have been selected.
Laser sintering of silver nanoparticles deposited by dry aerosol printing
Authors: Khabarov K M , Kornyushin D V , Masnaviev B I , Tuzhilin D N , Efimov A A , Saprykin D L , Ivanov V V 
Published: December 2019

Abstract
This work is devoted to the sintering of silver nanoparticle arrays in the form of lines by the local treatment with laser radiation with wavelengths of 527, 1054 and 1064 nm in pulsed and continuous laser modes. The silver nanoparticle lines were formed by the dry aerosol printing, free from organic solvents and surfactants. To form the lines with a width of 25–300 μm and a thickness of 0.1–15 μm a focused stream of nanoparticles with an average size of about 60 nm was used. It is shown that when using continuous laser radiation with a wavelength of 1064 nm, the minimal specific resistance of silver nanoparticle lines was achieved 3 times higher than that for the bulk material was reached.
Composition, structure and hardness of titanium after pulse laser processing in graphite
Authors: Koshuro V , Voyko A , Fomina M , Papshev V , Antropov A 
Published: December 2019

Abstract
The structure, composition and hardness of the surface layer of titanium after laser processing in a solid carburizer (graphite) were studied. As a result of the processing, a coating containing Ti, C, O and characterized by a thickness of up to 10 μm, hardness up to 11.5±0.9 GPa and the presence of nano-sized structural elements was formed on the surface of titanium. The resulting diffusion layer with a fine dendritic structure consisted of Ti and C. The diffusion layer with a thickness of 130±20 μm was distinguished by a high microhardness of 16.7±0.6 GPa.
Synthesis, Raman enhancement, and chemical stability of CaCO3 microparticles with copper coating
Authors: Markina N E , Danchuk A I , Zakharevich A M , Markin A V 
Published: December 2019

Abstract
The aim of the work is the microwave-assisted (MW) synthesis of SERS-active copper nanoparticles (CuNPs) and the core-shell composite based on nanostructured copper layer deposited over CaCO3 microspheres (CaCO3@Cu; 1.4±0.4 μm). The comparison of MW synthesized CuNPs and gold nanoparticles showed the equal orders of magnitude of the Raman enhancement. The temporal stability of CaCO3@Cu samples was found significantly better than that of CuNPs: 4 days vs. 30 min. Stabilizer- and organic solvent-free synthesis of CaCO3@Cu enables to minimize background SERS signal. The applicability of CaCO3@Cu for chemical analysis was showed by detection of antibiotic drug (ceftriaxone) in a range of concentrations which is relevant for practical purposes (5–500 μg/mL).
Magnetic-force microscopy of thin Bi:IG films for thermomagnetic recording
Authors: Vysokikh Yu E , Krasnoborodko S Yu , Danishevskaya Y V , Mikhailova T V , Nedviga A S , Berzhansky V N , Bulatov M F , Churikov D V 
Published: December 2019

Abstract
Thermomagnetic recording on thin films is currently one of the most promising methods for copying records with high density and weak magnetization. These films can be characterized by a couple of parameters very suitable for recording reconfigurable magnetic atomic traps whose geometry is visible. Different types of materials are investigated to be the most effective for thermomagnetic recording propose. In this paper authors showed possibility and features of thermomagnetic recording on Bi:IG thin films. High coercivity thin films with low Curie temperature and different film-lattice mismatch parameters were synthesized. Thermomagnetic recording of magnetic disc was performed. Features of magnetic records were investigated and influence of film-lattice mismatch parameters on meta-stable domain structure that defines the thermomagnetic recording resolution was showed. Magnetic-force microscopy was used for topography and magnetic structure characterization of thin films with different film-lattice mismatch parameters. Some features of films morphology were investigated using atomic-force microscopy with sharp AFM probe.
Molecular dynamics study of As dimer formation on the GaAs (001) As-rich surface
Authors: Prasolov N D , Gutkin A A , Brunkov P N 
Published: December 2019

Abstract
Using the molecular dynamics modelling the study of the process of As dimer formation on the GaAs (001) surface was carried out at different temperatures as a function of time. To describe GaAs properties the bond-order potential was used. It was found that the activation energy of formation of single dimer is about 38 meV, while the dimer dissociation energy is about 2 eV. The characteristic time of the single dimer generation lies in the range 10-6 – 10-8 s for temperatures from 28 to 37 K.
Formation of a Corrugated Graphene Substrate on the Paraffin Surface
Authors: Votyakov S A , Samorodov N A , Pakharukov Yu V , Shabiev F K , Safargaliev R F 
Published: December 2019

Abstract
In this paper, we propose a method of creating a wave-like corrugated surface from graphene nanoparticles. Due to the Kelvin-Helmholtz instability, the graphene suspension flowing onto the melted paraffin forms a wave-like surface. The inhomogeneity wavelength λ can be controlled by changing the relative surface tension.
Influence of carbon in the Sp1 state on the Schottky transition Si-Cd
Authors: Kokshina A , Kochakov V , Vasilyeva O 
Published: December 2019

Abstract
This article presents the results of a study of the photoactive film of metal-carbon system as an example cadmium - linear-chain carbon (Cd-LCC). It is shown that when this system is annealed in a nitrogen atmosphere, the addition of cadmium atoms to cumulene carbon chains occurs. Investigation of the properties of the Si-Cd-LCC system doped with nitrogen showed a significant increase in the photoactivity of the Schottky transition in the Si-Cd system.
Development of technology for the formation of vacuum field emission cells using focused ion beams
Authors: Panchenko I V , Shandyba N A , Kolomiytsev A S 
Published: December 2019

Abstract
The article presents the results of the development of technology for the formation of vacuum field emission structures. Experimental studies of local ion-stimulated deposition of W and C and ion-beam etching were carried out and their effects on the formation of final structures were studied. The technological process of manufacturing nanoscale field emission structures was developed, and experimental samples were fabricated. It is shown that the use of the method of focused ion beams (FIB) demonstrates its advantages compared with other methods.
Features of construction of the scheme of fiber-optic communication system for transmission of analog signals in the frequency range from 0.135 to 40 GHz
Authors: Fadeenko V B , Pchelkin G A , Davydov V V , Glinuchkin A P , Beloshapkina O O , Rud’ V Yu 
Published: December 2019

Abstract
The paper presents the design of a fiber-optic microwave signal transmission line. The use of the developed design of a fiber-optic microwave transmission line allows the radar operating frequency range to be at least doubled. In addition, the number of functional blocks is reduced to ensure the operation of the radar in this frequency range. The results of experimental studies are presented.
Simulation of quantum transport in doped carbon nanotube diode controlled by transverse electric field
Authors: Timkaeva D A , Sibatov R T 
Published: December 2019

Abstract
Using first-principle and semi-empirical methods, optical responses and transport characteristics of hybrid CNT-based diodes are studied. The junction is realized by a combination of doping of one half of a nanotube and applying a transverse electric field to the other. Calculations are carried out in the framework of the density functional theory and the nonequilibrium Green function method. The possibility of using these rectifiers in optical nanoantennas is discussed.
Detailed Monte-Carlo simulation of PMMA chain scissions in e-beam lithography
Authors: Sidorov F A , Rogozhin A E 
Published: December 2019

Abstract
Detailed Monte-Carlo simulation of e-beam events in PMMA/Si system has been carried out. Polymer chains are modeled using random walk algorithm with subsequent assignment of simulated e-beam events to certain monomers. The processes leading to PMMA chain scission are determined to be ionization events on C atoms of PMMA backbone bond due to analysis of resist weight distributions, obtained by gel permeation chromatography.
Laser formation of nano-Si structures in glasses
Authors: Babich E S , Redkov A V , Melehin V G , Khlopin D , Lipovskii A A 
Published: December 2019

Abstract
The irradiation of a BOROFLOAT® 33 glass plate with lithographically-fabricated array of aluminum nanodisks on the surface by a focused low-power 523 nm laser beam resulted in the formation of silicon nanocrystals in the subsurface layer of the glass. The nano-Si was registered with Raman scattering technique. The formation of the nano-Si is local and grown nanocrystals are stable.
Discriminating a Nuclear Blast from A Natural Seismic Event Using A Full Moment-Tensor Inversion Method
Authors: Prastowo T , Madlazim  , Supardiyono  
Published: December 2019

Abstract
Identification of seismic signals if they are generated by tectonic or volcanic origin or underground nuclear tests is of primary importance for impacts on environmental issues. The recent blast on September 3, 2017 has been in question due to its potential destruction on the global environment. Here, we applied a method of full moment-tensor inversions to analyse broadband waveforms generated by such an explosion. The signals were recorded by a network of 4 regional seismic stations (MAJO, INCN, MDJ, BJT), situated between 360 and 1,100 km away from the explosion epicenter. The results showed that a variance reduction of 72.6%, providing high confidence for all values obtained from the method used: a seismic moment of Mo
= 6.25 · 1024 dyne cm, corresponding to a moment magnitude of M
w = 5.8, with a dominant volumetric component (ISO) of 50% relatively compared to a 6.8% double-couple (DC) part and a 43.2% compensated linear vector dipole (CLVD) part, and a centroid-depth of 1.0 km. The relative dominance of the ISO seismic component over the other two components, along with the shallow source extracted from the cross-correlation and source mechanism analysis, suggests that the September 3, 2017 explosion was induced by a suspected nuclear test.
Simple Glucose Measurement System Based on Uncladded Fiber Bragg Grating Etched with Nitric Acid
Authors: Asnawi  , Rahmawati E , Qomariyah N , Siddiq N A , Goshals S K , Pramono Y H 
Published: December 2019

Abstract
The demand for a non-invasive, fast, and accurate glucose detection for diabetic patients is increasing nowadays. It is predicted that diabetic patient will increase from 415 million people at 2018 to 640 million people at 2050. Glucose is also present in saliva, therefore glucose concentration measurement in saliva can be an alternative way during diabetics monitoring. In this study, we measure 0-60% glucose concentration through optical systems. The optical system consists of an erbium-doped fibber laser, uncladded fiber bragg gratings that have been etched with nitric acid (HNO3), and optical spectrum analyser (OSA). The measured parameter is a Bragg wavelength shift due to changes in glucose solution concentration. The results show that the wavelength shifts to lower value (blue shift) as the glucose concentration increases. The sensitivity obtained from this measurement system is 1.2 pm/% in glucose solution. This result is a preliminary study to detect glucose concentration in saliva based on Fibber Bragg Grating which has advantages for diabetic patients such as simple setup, non-invasive, fast, and low cost.
Development of Optical Fiber Sensor Performance as a Tool to Determine Cholesterol Concentration
Authors: Budiyanto M , Purnomo A R , Sabtiawan W B , Suhariningsih  , Yasin M 
Published: December 2019

Abstract
The purpose of this study was to determine cholesterol concentration by developing the performance of optical sensors. The use of this optical sensor is equipped with an optical fiber bundle to guide the wave in the hope of not reducing the intensity of the wave source. This sensor is simpler and inexpensive to use to determine the concentration of a material. The research method for determining cholesterol levels can be determined through the character of the laser beam to the material through a fiber optic sensor. The optical fiber sensor method is simpler and cheaper to use to determine the concentration of a material. Based on this description, research on fiber optic sensors will be developed as an instrument model to determine cholesterol concentration using a fiber optic bundle type sensor. The method used is the modulation of laser beam intensity. A beam of light that enters the optical fiber of the receiver and is processed by an optical detector into an electrical signal that will be displayed on the computer. The experimental results will obtain a linear relationship between the sensor output peak voltage as a function of variations in cholesterol concentration and parameters and sensor performance will be measured including sensitivity and linearity. The results showed that maximum voltage detection showed a linear decrease with increasing concentration with a sensitivity of 0.15 mV/ppm and a linearity of more than 97%. high sensitivity, simplicity of design, and low cost of promoting the developed sensor results in good performance detecting cholesterol concentration.
A Water Surface Cleaning Robot
Authors: Rahmawati E , Sucahyo I , Asnawi A , Faris M , Taqwim M A , Mahendra D 
Published: December 2019

Abstract
This paper describes the design of a robot for cleaning rubbish floating on the water surface. Three important issues for designing the aquatic robots are a cost-effective solution along with robustness and durability. Due to the nature of the cleaning work, we designed the vehicle structure that can provide high stability, good ability in maneuver and can easily collect all the waste flowing in between. A pontoon shaped hull works best for this case and fulfils all the hydrostatic, structural stability criteria. For removal and collection of surface waste, a motor-driven collecting-arm system has been designed for collecting the wastes and redeploying it into a rectangular basket on the hull. This design provides simple and effective waste removal and accommodates large amounts of waste within a small space. For the prototype, the hulls were made up of styrofoam which is wrapped by fibre and then coated with waterproof and resin. It supported together by aluminum. This light and tough structure support the total weight of the system. The propulsion system based on a differential drive mechanism has been designed, which allows the robots to take a 360 turn on the spot and provides high thrust. Electronic circuit and motors have been placing inside the hull, in order to protect them from water. The robot is manually controlled by remote control based on Xbee Pro wireless modules. The testing of the robot prototype proved to be effective in waste collecting and removal. The maximum trash loads that robot can bear is up 16 kg.
Multinomial Logistic Regression and Support Vector Machine for Osteoarthritis Classification
Authors: Aroef C , Yuda R P , Rustam Z , Pandelaki J 
Published: December 2019

Abstract
Everyone joints go through a cycle of damage and repair during their lifetime, but sometimes the body’s process to repair our joints can cause changes in their shape or structure. When these changes happen, it’s known as osteoarthritis. Osteoarthritis is the most common form of arthritis, affecting millions of people worldwide. Osteoarthritis causes pain, swelling, stiffness in the areas, and decreased the ability to move for the sufferers. Therefore it requires accurate method of classification. Many methods have been used to classify osteoarthritis, but this study will apply Multinomial Logistic Regression and Super Vector Machine (SVM) as the machine learning methods. We used CT scan result data from RSUPN dr. Cipto Mangunkusumo, Central Jakarta. The results show the SVM provides better results than Multinomial Logistic Regression in terms of classification accuracy. The highest accuracy of SVM reaches around 85%, while Multinomial Logistic Regression only 71%.
A Split Plot Design for an Optimal Mixture Process Variable Design of a Baking Experiment
Authors: Sitinjak Mika Alvionita , Syafitri Utami Dyah , Erfiani  
Published: December 2019

AbstractA mixture process variable (MPV) design consists of mixture design and process variable(s). The problem in MPV experiment is the number of experiment runs will be larger if the process variable increases. An optimal design can be a solution to produce a good design with a certain criterion and a limited number of runs. In practice, the compositions of the mixture design are running on each level of the process variable(s). It has a consequence that the randomization is restricted. A split-plot design can be an alternative to overcome the problem. In this research, the whole plots of the split-plot design were the levels of the process variable(s) and the subplots were the compositions of the mixture experiments. In addition, two optimality criteria were used: D-optimality and I-optimality criterion. The D-optimal design is searching a design by minimizing covariance of model parameters meanwhile the I-optimal design is seeking a design by minimizes average of the prediction variance. The study case was a baking experiment in which consisted of three flours and a process variable. It is surprised that the D-optimal design out performed compared to the I-optimal design in terms of the variance prediction in this case.
Analysis between Temperature and Wind Speed in East Java using Bivariate Extreme Value Theory
Authors: Oktaviarina A , Sofro A 
Published: December 2019

Abstract
Extreme weather now is the biggest effect of climate change. It is also a major issue over the past decade. High heat and hurricanes are some of its indicators. Both natural disasters have a big impact not only on humans but also on the presence of animals and the environment. Therefore, modelling of the disaster, especially for prediction extreme events is the basic need to minimize the damage and the losses. Both of the hazards come from extreme temperatures and wind speeds, respectively. Hence, this paper will analyze the issues using extreme value theory (EVT) approach. We will investigate it separately and then analyze both two cases simultaneously. The results show that using peaks over threshold univariate or separately approach is the best model among other approaches since providing the smallest AIC value. Meanwhile, the value of AIC for the block maxima is smaller than peaks over threshold using the bivariate approach.
The New Convergence Definition for Sequence of k-Dimensional Subspaces of an Inner Product Space
Authors: Manuharawati  , Yunianti D N , Jakfar M 
Published: December 2019

Abstract
We discuss the convergence for sequence of subspaces of an inner product space. This paper is an extension of the work by Manuharawati et al [10 and 11]. In this paper, we present a concept of convergence of sequence of k-dimensional subspaces of an inner product space. The properties of the concept are established. Moreover, we also study its connection with angles in an inner product space.
Mathematics Subject Classification 2000: Primary 40A05; Secondary 14M15, 15A63, 46B20