bluuebunny/crossref_metadata_2025_split huggingface dataset:
Behavior of B4C coating on tungsten under exposition on T-10 tokamak plasma
Authors: Begrambekov L B , Grunin A V , Sadovskiy Ya A 
Published: August 2019

Abstract
It was shown (Buzhinsky, 2003) that in situ renewable coating of boron carbide can protect the tiles of the divertors of thermonuclear facilities from destruction and also to prevent accumulation of remarkable amounts of tritium in the plasma facing materials. In the paper presented a plasma method for deposition of boron carbide coating with a high adhesion to tungsten was developed. In the laboratory installation boron carbide coating on tungsten was subjected to cycling irradiation by the deuterium ion flux with power density up to 5.0 MW/m2 in the temperature range up to 1500 K. The results of the tests showed that the composition, integrity and adhesion of the coating were not violated in the laboratory tests. In the T-10 tokamak the behavior of the coating was investigated in the temperature range up to 3600 K when irradiated with plasma power in the range of 20–100 MW/m2 during plasma disruption. Being irradiated in T-10 tokamak, the coating retained its continuity, adhesion and protected tungsten from the effect of the even at temperatures of 2500–3600 K, when the coating melted under irradiation and its composition changed to B:C ≈ 1:1.
Investigation into the buffer-layer effect on the phase formation in Au80Sn20 thin film solder obtained by electron-beam deposition technique
Authors: Filonenko E M , Fomin A V , Titova O V , Chemagina I V 
Published: August 2019

Abstract
In this work, differential scanning calorimetry (DSC) and X-ray microanalysis are used to investigate Ti and Ti/Pt buffer-layer effect on the eutectic formation in 1μm Au80Sn20 thin film solder obtained by electron-beam deposition of gold tin alternating layers.
Effect of oxygen flow rate on the deposition rate of α-Al2O3 coatings by anodic evaporation of Al in an arc discharge
Authors: Gavrilov N V , Kamenetskikh A S , Tretnikov P V , Chukin A V , Men’shakov A I 
Published: August 2019

Abstract
Effect of O2 flow rate on the kinetics of growth and properties of α-Al2O3 coatings deposited by reactive anodic Al evaporation at 640 °C has been studied. It has been shown that the growth rate of coatings changes non-monotonously with O2 flow, rise of the growth rate is due to the increase in the concentration of atomic oxygen in plasma, and the decrease at large O2 flows is associated with transition from the mode of free transit of Al atoms to the diffusion mode.
Influence of pulse electrolysis modes on structure and properties of coatings based on Co-Mo alloy obtained from citrate pyrophosphate electrolyte
Authors: Gololobov G P , Suvorov D V , Tarabrin D Yu , Slivkin E V , Serpova M A , Avramenko S A , Arefyev A S 
Published: August 2019

Abstract
The present paper has represented the results of the research of electrochemical deposition of coatings based on Co-Mo alloy obtained from the citrate pyrophosphate electrolyte. Influence of pulse electrolysis modes, in particular relative pulse duration, on current efficiency and elemental composition has been determined. Research of the obtained coating microreliefs has been performed.
The effect of ion irradiation (Ar+, E = 10 keV) on the nanocrystalline structure and the aging of the Al-Li-Cu-Zn-Mg-Zr-Sc alloy after megaplastic deformation
Authors: Gushchina N V , Ovchinnikov V V , Makhin’ko F F , Kaigorodova L I , Rasposienko D Yu 
Published: August 2019

Abstract
The effect of Ar+ ion irradiation on structural and phase transformations in a 1461 alloy (Al–Li–Cu–Mg) subjected to megaplastic deformationhas has been studied by transmission electron microscopy. Short-term irradiation (E = 10 keV, F = 2 × 1016 cm−2) has been established to form a low-energy recrystallized submicrocrystalline structure at a depth (∼200 μm), significantly exceeding the projective ion ranges (∼10 nm). The study confirms the important role of the radiation-dynamic effect during the ion irradiation of metastable media. The structural and phase transformations take place in the alloy at a depth of much higher than the projective ion ranges and at a higher rate compared with traditional thermal annealing.
Tribological properties of TiN-Pb system solid lubricant coatings with various morphologies
Authors: Lesnevskiy L N , Lyakhovetskiy M A , Lozovan A A , Nikolaev I A 
Published: August 2019

Abstract
The paper presents the results of the investigation of the solid lubricant coatings (SLC) tribological properties of several designs based on a TiN matrix with the addition of Pb (∼6% atomic). A comparison of the tribological properties is made between the TiN coating without the addition of a solid lubricant component, a monolayer coating of TiPbN with a TiPb adhesive layer and a multilayer coating with alternating TiPb / TiPbN layers. It is shown that the monolayer coating has the smallest friction coefficient (∼0.2), while the friction coefficient of a multilayer coating is ∼0.75, which coincides with the friction coefficient for the TiN coating. Despite the friction coefficient high level of the multilayer coating, its resistance to wear is at the level of the monolayer coating.
Modification of the electrode surface in glow discharge plasma with a hollow cathode
Authors: Marakhtanov M K , Riazanov V A , Alekseev D K 
Published: August 2019

Abstract
The electric discharge with a hollow cathode has long attracted the attention of researchers, both by its physical properties and technological application. The paper considers the influence of the shape of the treatment surface, which takes the geometry of a hollow cathode, on the parameters of a glow discharge.
Hydrophilic properties of surface of nanostructured tantalum films and its oxynitride compounds
Authors: Petrovskaya A S , Lapitskaya V A , Melnikova G B , Kuznetsova T A , Chizhik S A , Zykova A V , Safonov V I 
Published: August 2019

Abstract
The structure and hydrophilic properties of tantalum coatings on stainless steel and glass slide were investigated using atomic force microscopy (AFM) and sessile drop method. Coatings are characterized by a cellular structure. As a result of the modification, the hydrophobicity of the sample surfaces is increased.
Acoustoelectric method for determining dielectric characteristics the liquid in the boundary layer
Authors: Simakov I G , Gulgenov Ch Zh , Bazarova S B 
Published: August 2019

Abstract
The possibility of using surface acoustic waves has been demonstrated to determine the dielectric characteristics of a liquid in a layer adjacent to the surface of a piezocrystal. The developed acoustoelectric method allows to investigate the electrophysical properties of nanoscale coatings and films.
Physical properties of calcium fluoride nanopowder produced by the method of evaporation by pulsed electron beam in a low-pressure gas
Authors: Sokovnin S Yu , Il’ves V G , Uimin M A 
Published: August 2019

Abstract
Mesoporous CaF2 nanopowders with the specific surface area up to 88.7 m2/g have been produced by the evaporation by a pulsed electron beam in vacuum. The influence of thermal annealing in air on the size and morphology of CaF2 nanoparticles and their magnetic, luminescence, and texture characteristics has been studied. Ferromagnetism of CaF2 nanopowders was discovered for the first time. The influence of radiation defects (CaF2 dye centers) on magnetic properties of CaF2 nanoparticles has been examined.
Tribological behavior of magnetron sputtered nanocomposite coatings on base of Cu-Mo-S
Authors: Zharkov S Yu , Sergeev V P , Kalashnikov M P , Sergeev O V , Sungatulin A R 
Published: August 2019

Abstract
Tribological properties of solid lubricant electrical conductive magnetron coatings based on the Cu-Mo-S system were studied. Wear resistance increasing and lubricating mechanisms of the coating during adhesive wear tests in inert atmosphere has been demonstrating.
Modelling of phase composition of Sn-Fe layered system obtained by ion-plasma sputtering
Authors: Zhubaev A K , Mukhanbetzhan T S , Yerezhepova S K 
Published: August 2019

Abstract
The Mössbauer spectra on Iron and Tin nuclei in different states in the phases of the binary system Fe-Sn are modeled. Reference spectra of intermetallic compounds and α-Fe (Sn) solid solution were obtained. The spectra of Iron and Tin alloys of various concentrations were calculated. A comparison with the experimental spectrum of the layered Sn(4 μm)-Fe(10 μm) system obtained by ion-plasma deposition of Tin on an armco iron substrate and subjected to thermal annealing at 700°C showed a good correlation.
Drounght Analysis By Using Standarized Precipitation Index (SPI) and Normalized Difference Vegetation Index (NDVI) at Bekasi Regency in 2018
Authors: Rokhmatullah  , Hernina R , Yandi S 
Published: August 2019

Abstract
Drought problem is a routine problem occurring in several regions in Indonesia. Bekasi Regency is one of the regions impacted by drought every year. Such threat of drought occuring due to influence of climate is unavoidable. Nevertheless its impact can be minimized if we know the drought pattern of such a region. Meteorologically, drought monitoring can be conducted with various methods. One of the methods used is by knowing the SPI (Standardized Precipitation Index). SPI method is the rainfall unit occurring under normal condition in such a time scale. Beside meteorologically monitoring, it can also be monitored based on the spread of vegetation influencing the availability of water supply which can be seen from the NDVI (Normalized Difference Vegetation Index) value. The purpose of this research is to find the relation between the SPI (Standardized Precipitation Index) value and the NDVI (Normalized Difference Vegetation Index) value. The result of this research shows that there is a close relation between a region having such a high SPI value and NDVI value. But in a region having a low NDVI value, several regions have high SPI values.
Land degradation index of tropical forest landscape in Batang Toru watershed using spatial analysis
Authors: Samsuri  , Jaya I N S , Kusmana C , Murtilaksano K 
Published: August 2019

Abstract
Forest degradation and deforestation have reduced the functions of forest ecosystem in Batang Toru watershed landscape. The degree of land degradation rate can be minimized by restoring the functions of forest ecosystem. Data concerning the degree of land degradation is needed to restore the functions of forest ecosystem. This research aims to obtain spatial distribution characteristics of land as well as land degradation index in Batang Toru watershed landscape. Land degradation was determined by using 3 variables, namely soil chemical and physical properties, as well as erosion type which occur in the site. Each variable was ranked through Likert scale. The total score of all land degradation indicators was converted into land degradation index. The study found that land degradation index in Batang Toru watershed landscape consist of very low (0,00-0,2), low (0.21-0,4), moderate (0.41-0,60 ), high (0.61-0.80) and very high (0.81-1.00). Most of Batang Toru watershed areas fall into moderate land degradation category.
Land Suitability for Cocoa Development in South Sulawesi: An Analysis using GIS and Parametric Approach
Authors: Neswati R , Asrul L , Molla A , Widiayani N , Nurqadri S 
Published: August 2019

Abstract
In South Sulawesi, the regional program for prime commodity development has been implemented by the provincial government, as part of promoting regional spatial planning program. In some parts of the region, cultivation of cocoa (Theobroma cacao L.) as prime commodity has long been practiced in different soil environment. Therefore, there is a need for information that will allow land managers to identify both the inherent land suitability, and the spatial distribution of land areas where possible development can be implemented taking into account present land use types. This paper describes a spatial based quantitative suitability evaluation of land for cocoa production. This research was carried out in the one of the cocoa-producing districts in South Sulawesi, District of Luwu Timur. The research project implements land suitability evaluation method based on the spatial-quantitative approaches in Geographical Information Systems (GIS). The main sources of data bases used include digital topographic map, land use map, soil map and soil characteristics derived from available data at reconnaissance level and semi detailed survey, climate data, and satellite imagery. The results of analysis of potential development area for cocoa cultivation show that more than 90 percent of study region are suitable (at S2 and S3 classes) for cocoa cultivation. This study reveals that there are some limiting factors in term of chemical and physical soil characteristics that can still be improved, but there will be almost no limitation in terms of land cover type for cocoa development.
Comparison of Optic Landsat-8 and SAR Sentinel-1 in Oil Palm Monitoring, Case Study : Asahan, North Sumatera, Indonesia
Authors: Carolita I , Darmawan S , Permana R , Dirgahayu D , Wiratmoko D , Kartika T , Arifin S 
Published: August 2019

Abstract
World production of palm oil increased spectacularly in the last 20 years, especially in Indonesia and Malaysia. As the largest producer, good management in oil palm plantation is very important, the expansion of plantation also must be well planned, because its existence must not affect the surrounding environment. Therefore the information of oil palm age or condition of their growth is needed. Remote sensing has significant potential to aid oil palm monitoring and detection effort. It also provides a cost-effective method to these purpose and at same time provides side specific assessments of management areas, Synthetic Aperture Radar (SAR) is crucial for this task. The SAR is an active sensor that operates in all weather condition and daylight independent delivering information all year around at the time that is needed. SAR is sensitive to texture, size and orientation of structural objects, moisture content and ground conditions. This study has objectives to compare the methods that have been developed to monitor oil palm by using optic data and SAR data. The data that used are Landsat 8 and Sentinel-1.The study area is Asahan district North Sumatera. The regression analysis by using regression method indicates that oil palm age can be monitored by using NDVI or backscatter of SAR values with growth model. The R2 of model for Landsat 8 is 0.85 and 0.77 for Sentinel 1. Both models can be used for monitoring the condition and age of oil palm.
Detection Paddy Field using dual Polarization SAR Sentinel-1 Data
Authors: Dirgahayu D , Parsa I M , Harini S 
Published: August 2019

Abstract
Paddy field conversion monitoring is necessary conducted to ensure successful the harvest of rice. The monitoring can be done by using satellite data, both optical and radar data, which can cover a large area. In tropical area, cloudy day usually occurred, so that problems can’t be handle with optical data. Utilization of radar data that can penetrate the cloud condition can solve the problem, either as a complement of optical data or used alone to monitor the paddy field conversion. The research was conducted to investigate the capability of Sentinel 1 SAR multi temporal data to detect paddy field based on growth phenology of rice crop. This research explores SAR Sentinel-1A data (C-band, VV and VH polarization) for several growing seasons in 2017 (January-December) to detect paddy fields in Subang Regency, West Java. Stacking layer is carried out prior to classification, time series image and polarization composite image (VH/VV), stacking maximum, minimum, mean and range values, standard deviation and taking sample training and statistical analysis. Taking sample training takes into account the phenology of rice plants (phases of paddy crop) using references to appropriate Landsat imagery. Classification is done by the time series algorithm, while the accuracy is calculated with Kappa coefficients from the 1: 5000 paddy field map reference. The results found that SAR data in dual polarization (HV, VV), and Polarization Index (PI = 1-NDPI) can be used to detect paddy field. The best overall accuracy was obtained from the Min, Max, and Mean of PI 87%, Mean VH polarization 78%, Standard Deviation VH polarization 76%, and Range polarization VH 74%.
Spatial dynamic prediction of landuse / landcover change (case study: tamalanrea sub-district, makassar city)
Authors: Hakim A M Y , Baja S , Rampisela D A , Arif S 
Published: August 2019

Abstract
The phenomenon of landuse change from an undeveloped area into a built-up area is often the case, especially in big cities. Population growth, both in birth and migration rates, is one of the factors that causes the need for land for various human activities. Tendency for landuse change is expected to continue in the following years along with a region development. The city of Makassar has a tendency for landuse change. This is due to the position of Makassar as the capital of the South Sulawesi province which has A-level public service and it has become a separate magnet for people from outside the city to conduct activities and live in the city. The purpose of this research is to predict landuse/landcover (LULC) change until 2033 by classifying using Landsat satellite imagery include 2008, 2013, and 2018 into 5 landuse/landcover classes in Tamalanrea Sub-District with the Modules for Land Use Change Simulations (MOLUSCE): Multi-Layer Perceptron Neural Network and Geographic Information System method. This research shows the percentage of changes in 5 classes of landuse from 2018 to 2033, are: agriculture area with -0,30%; built-up area with 3.15%; barren area with -5.11%; vegetation with 0.98%; and water body with 1.27%.
Spatial Patterns Analysis of Deforestation in Palopo Municipality and East Luwu Regency
Authors: Rijal S , Vicayana D P , Barkey R A , Alimuddin I , Mukhlisa A N 
Published: August 2019

Abstract
Deforestation is an activity or process that converts forest cover into non-forest land cover with a certain pattern. Palopo and East Luwu are two districts in South Sulawesi deforested due to the demand of the human need to convert the land into settlements, infrastructure and timber harvesting. This research was conducted to find out the temporal spatial pattern in dealing with deforestation. Analysis of spatial patterns using fragstat software with input data i.e. land cover shapefile data in 1990, 2000, 2010, and 2016 that produced contour in metrics, and its subdivision in metrics. Temporal spatial patterns of deforestation are built by combining three spatial metric values. Based on the description of deforestation analysis in Palopo Municipality covering 852,96 ha and East Luwu with 86,963,46 ha, Palopo Municipality experienced the highest deforestation from 1990 to 2000 amounted to 451.69 ha and continued to decline in the period of 2000-2010 and 2010-2016. Deforestation in East Luwu Regency is the highest in the 1990-2000 period which is 38.655,05 ha. Deforestation in East Luwu Regency has higher contiguity than deforestation occurring in Palopo Municipality indicating that the occurrence of deforestation occurring in East Luwu Regency occurred directly from previously degraded areas to adjacent forest areas. Palopo and East Luwu Regency show fragmentation rates that tend to decrease due to the decreasing number of fillings that are formed the largest combination of spatial patterns occurring during the observation period was the spatial pattern of deforestation grouped, with high density (not fragmented) in 50 villages (61.72%).
A comparison of Satellite Image Compression methods in the Wavelet Domain
Authors: Indradjad A , Nasution A S , Gunawan H , Widipaminto A 
Published: August 2019

Abstract
Better resolution of remotely sensed satellite images will make images clearer and interpretation easier but will increase the total volume of data that has to be managed. In order to reduce data volume for easier satellite communication transmission and reduce the total volume of data needed to be stores, the images should be compressed. Image compression in wavelet domain can be used for both lossy or lossless compression. Four major compression methods are available using the wavelet domain, i.e. CCSDS, Wavelet, Bandelet, and JPEG 2000. Some optical satellite images, were used as input data in simulation software which analyzed and compared the four compression methods in the wavelet domain. The result showed that the CCSDS method yielded the fastest compression and decompression time, but the Bandelet method retained better image quality when reconstructing original images or approximations of them compared to CCSDS. The JPEG 2000 method delivered better quality images than CCSDS for low bit rate. In summary at a rate of 0.25 bpp, CCSDS is 15 times faster than Bandelet and 3 times faster than JPEG2000. However, CCSDS quality is lower by up to 8.77% compared with Bandelet and up to 13.64% compared with JPEG2000.
The application of Sentinel 2B satellite imagery using Supervised Image Classification of Maximum Likelihood Algorithm in Landcover Updating of The Mamminasata Metropolitan Area, South Sulawesi
Authors: Alimuddin I , Irwan  
Published: August 2019

Abstract
Mamminasata Metropolitan Area includes the City of Makassar, some sub-Districts of Maros, Gowa and Takalar Regencies. This metropolitan area were formed based on the Governor of South Sulawesi Province Decree in 2003 with a total area of 246,230 ha. Sentinel-2B is a European optical imaging satellite that was launched on 7 March 2017. It is the second Sentinel-2 satellite launched as part of the European Space Agency’s Copernicus Programme, and its orbit phases 180° degrees against Sentinel-2A. The satellite carries a wide swath high-resolution multispectral imager with 13 spectral bands. It provides information for agriculture and forestry, among others allowing for prediction of crop yields. Multispectral classification process can be divided into two types namely supervised and unsupervised classification. In this research, supervised classification was applied which includes a set of algorithms that are based on the entry of sample objects and geographic location. Maximum likelihood algorithm is the statistically most established algorithm. Other algorithm is based on the measurement of the distance between the coordinates of the sample group and the pixel coordinates candidate while the maximum likelihood algorithm using probability calculation. In this algorithm, pixels were classified as specific objects not because of their Euclidean distance, but by the shape, size and orientation of the sample on the feature space. Maximum likelihood algorithm works the following way, program briefly marks each pixel which has a measurement of the pattern or appearance of X into class i whose unit is most likely to be grouped as a vector X. Foundation of the maximum likelihood algorithm uses a probability value of a pixel X to be a member of a particular class or a particular label.