bluuebunny/crossref_metadata_2025_split huggingface dataset:
About the influences of gas composition and generator frequency on the formation conditions and parameters of vortex tube in the RF inductively coupled plasma
Authors: Grishin Yu M , Miao L. 
Published: June 2019

Abstract
The results of numerical simulation of plasma flow in the channel of technological radio frequency inductively coupled plasma (RF–ICP) with three coils are presented. The generator frequency is varied from 1.76 to 13.56 MHz. The pure argon or Ar/H2 mixture are considered as the working gas. The volume fraction of hydrogen in Ar/H2 mixture is varied from 0 to 10%. The distributions of gas-dynamic parameters of plasma flow are calculated. It is shown that when the amplitude of discharge current exceeds a critical value (depends on volume fraction of hydrogen), the states of plasma flow transform from potential to vortical patterns, in which a toroidal vortex is found in front of the inductor zone. The dependencies of critical current on the generator frequency and volume fraction of hydrogen are established. The influences of generator frequency, volume fraction and discharge current on the intensity and coordinate of vortex tube are determined.
Application of innovative materials with stochastic nano- and microstructure of the surface: control of turbulent flows in plasma and aerodynamics
Authors: Budaev V.P. 
Published: June 2019

Abstract
It is proposed to control plasma turbulence near the LCMS of a tokamak with a system of electrodes made from porous tungsten. We propose to apply the RF modulation at the ion-cyclotron resonance frequency for driving of fluctuations near the LCMS. Porous tungsten plates used as biasing electrodes are the advantage to increase the emissivity of the porous surface and to reduce a surface erosion. To reduce the drag and thermal load on streamlined surfaces at supersonic and hypersonic speeds, it is proposed to cover the aircraft with materials of high porosity. The first experiments were carried by using model with fractal surfaces having non-Gaussian height statistics from ∼ 500 nanometers to ∼ 200 micrometers obtained by plasma treatment. The advantage of such a surface is the coincidence of the spectral and statistical characteristics of the stochastic topography of the surface with the turbulence characteristics of the flow.
The Development of Accelerating Structure E-type for 1 MeV Proton LINAC
Authors: Avreline N V 
Published: June 2019

Abstract
Experimental results and computer simulations of electrodynamic and thermodynamic characteristics are presented for an accelerating structure that is excited in the

T

M

010

0

mode and that has the accelerating channel of URAN-1M located in the diametric plane. The idea of using this structure in the particle accelerator URAN-1M, located at the Baikov Institute of Metallurgy and Materials Science, with the goal of increasing the average beam current is explored. The experimental study and the computer simulation of accelerating structure excited in E010 mode that has accelerating channel of URAN-1M placed in the diametric plane of structure resulted in Rsh
= 165 MΩ/m and Q
0 = 9736. To form an accelerating field identical to that of URAN- 1M, the structure requires less than 15 kW RF power. Thermal analysis showed that if the main parts of the structure are water-cooled, the structure could operate in CW regime.
The Use of Interplanetary Medium as Fuel for Plasma Thrusters
Authors: Karimov A R , Yakovlev O V , Murad P A 
Published: June 2019

Abstract
Consuming long-range interplanetary medium as a fuel for driving plasma thrust is crucial. The methods of capturing the space environment depending on its density and the ship velocity are critical issues. The possible ways of creating ionization for neutral fluxes as a function of the solar radiation flux are also analyzed as a potential propellant. These processes define the permissible type of the plasma source. These options look extremely promising where a low thrust device continuously operating, could possibly deliver a celestial target close to the speed of light. Under such conditions at a considerable distance, the density of such material diminishes and it may be impossible to maintain a continuous operation mode of the plasma thruster but instead operate as a pulsed engine which might potentially be workable.
Influence of the Frequency Detuning to Electrodynamics Parameters of an Electron Linac
Authors: Polozov S M , Pronikov A I 
Published: June 2019

Abstract
It is very important task to define the tolerances necessary for correct operation of an electron linac. The detuning of linac main parameters as frequency, RF field amplitude and phase can sufficiently influence to the beam parameters. It is highly important for linacs with high brightness beams which are necessary for light sources and colliders. It is also sufficient for industrial linacs. A linac section consists of regular and bunching parts. The influence of one cell detuning on electrodynamics parameters of the whole section was studied. Results of such simulation will discuss in this paper.
Fuzzy Multiple Attribute Decision Making Approach for Determining The Best Vocational High School
Authors: Sarbi Sukadji , Basri  , Muslihudin Muhammad , Waziana Winia , Rukmana Ria 
Published: June 2019

AbstractVocational High School has its charm for prospective students. Graduates have ready-to-work capability based on the skills needed in the workplace. Decision-Making System using Fuzzy Multiple Attribute Decision Making with Weighted Product method as the best SMK determinant method is an interactive computer-based system that can help decision-makers to find the best alternative based on predetermined criteria. In this case, the proposed alternative is to determine the best Vocational High School based on the criteria by finding the weight value for each attribute. The criteria needed in decision making are Facility, Accreditation, Quality, Student (Non-Academic Achievement), Cost, Human Resources Teacher.
Industry System Integration of Drug Distribution on Pharmaceutical Installation Based on Supply Chain Management
Authors: Qashlim Akhmad , Syarli  , Basri  
Published: June 2019

Abstract
Supply Chain Management (SCM) requires all sectors to collaborate, coordinate, communicate and exchange information to improve inter-sector productivity. It takes information technology and supplies chain concepts to integrate all sector activities involved such as, in the health field such as clinics and health services. System integration will create good communication and exchange of information, and data availability will be fulfilled. This research will try to offer information technology in the form of integration system by using SCM concept to improve management performance; this research focuses on pharmaceutical warehouse operational activities in the way of distribution and management of drugs. Delivery of LPLPO by Clinic, Monitoring of transactions by Public Health Office. This activity is an SCM practice that requires connected entities to view the same data without disrupting the independence of each sector. System design using the waterfall method. The system will be built with PHP programming and MySQL database. Testing system using Xampp 6.2 servers with black box method, testing is done by requesting pharmacy installation officer to use the system. The results of the system test show that the performance in the internal control section helps management in looking at the stock situation, the type of drug demand, and the trend of existing disease patterns in the community. Data visualization is also helpful in determining health intervention decisions and policies. This has opened the eyes of management to the importance of information technology. Finally, this research becomes a recommendation to the pharmaceutical installation management to use information technology in operational activities
The Quantification of Rainfall Variability Based on The Standardized Precipitation Index
Authors: Sanusi Wahidah , Sidjara Sahlan , Abdy Muhammad , Sudarmin  
Published: June 2019

Abstract
The objective of this research is to detect a pattern of rainfall in Gowa Regency using the standardized precipitation index (SPI). The SPI is a tool to investigate wetness and dryness events based on rainfall data in an area. In this study, monthly rainfall data are obtained from 6 rainfall stations. Data are collected from 1988 to 2017. The research result shows that the all stations have the highest frequency of normal condition of rainfall. Meanwhile, the frequency of both extreme wet and extreme dry events is the lowest about 2 percent in most stations. The result also shows that in general, Gowa Regency experiences very wet and very dry events with duration is one month, respectively.
Changes in Lactobacillus fabifermentans Population and Biochemical Changes during The Process of Controlled Corn Flour Fermentation and The Rheological Properties of Corn Flour Produced
Authors: Sukainah Andi , Fadilah Ratnawati , Mustarin Amirah , Putra Reski Praja , Taufieq Nur Anny Suryaningsih 
Published: June 2019

Abstract
This study aims to determine changes in population Lactobacillus fabifermentans (L. fabifermentans) and biochemical changes during controlled corn flour fermentation. The research is divided into two stages. The first stage was the making of starter by adding 48 hours culture on 50 g corn flour which was added 100 ml distilled water (1: 2), then incubation for 48 hours. The second stage is the application of a starter. The 48-hour starter was applied to cornstarch suspension (1: 2) by controlled method (starter concentrations of 1%, 3%, and 5%) and fermented using the microaerophilic technique at 24 hours and 48 hours intervals. The observed variables were a microbial count of Lactic Acid Bacteria (LAB), pH value and total acid on fermentation liquid, and rheological properties of modified corn flour. The results showed that the best rheological properties of corn flour fermentation resulted from the treatment of starter concentration of 1% with 24 hours fermentation time of 78000 Cps. The rheological properties of the resulting corn flour belong in referred the non-pseudoplastic Newtonian category. Where, during the fermentation process the starter concentration treatment of 1% with 24 hours fermentation time contained the amount of LAB (14.65 Log colony ml−1), pH value (5.08), and total acid (0.35%).
Correspondence Analysis of Breast Cancer Diagnosis Classification
Authors: Nadjib Bustan M. , Arif Tiro M. , Annas Suwardi 
Published: June 2019

Abstract
There are five indicators used in the diagnosis of breast cancer classification. The indicators are a type of malignancy, location, topography, morphology, behavior, and grade. This study aimed to assess how the relationship between types of diagnostic classification was given to breast cancer patients. The research is a quantitative method and used the hospital medical records were collected in the form of anatomical pathology examination results for hospital patients in the year 2017. Data were obtained from 317 pathology examinations which included 282 breast cancer patients. Each patient is given a diagnosis according to the pathologist’s observations into various classifications according to location, topography, type, morphology, grade, and behavior. The result of the analysis showed a relationship between the location of cancer and the type of malignancy. Furthermore, there is a difference in the probability of a malignant or benign tumor-attacking the right or left breast. Correspondence analysis was carried out between the location of the tumor with topography, type of malignancy, morphology, grade, and behavior respectively. The results showed that there was a significant correspondence between topography with the type of malignancy, type of malignancy with morphology, morphology with grade, and grade with behavior. Each type of diagnosis of breast cancer diagnosis is entirely accurate and has a significant correspondence relationship with each other.
An Intelligent Automatic Fault Detection Technique Incorporating Image Processing and Fuzzy Logic
Authors: Iftikhar Kulsoom , Anwar Shahzad , Khan Muhammad Tahir , Djawad Yasser Abd. 
Published: June 2019

Abstract
Fault detection is considered an important and challenging task to be incorporated in many industrial applications. It has gained interest in recent years, and many techniques have been proposed for developing an effective fault detection approach due to its significant importance in everyday life. This study presents an automated intelligent fault detection technique incorporating image processing and fuzzy logic. Image processing is the first step where features such as entropy estimation, color-based segmentation and depth estimation from gradients are obtained. The extracted features (number of {blobs, minima, maxima}, and estimated entropy) act as input to the fuzzy logic. The subsequent step incorporates fuzzy logic; the four inputs are fed to fuzzy which extract the fault and acts as knowledge rule-based tool and final step, i.e. the output generation, classifies it accordingly into four categories of faults (rust, bumps, hole, wrinkles/roller marks). The proposed method is compared with Linear Vector Quantization, and Multivariate Discriminant Function approaches. The method is tested on a database of 150 images. The proposed method demonstrated its significance and effectiveness with performance accuracy of 99%, 98%, 96.8% and 97.6% for rust, bumps, holes and wrinkles/roller marks respectively.
Physico-Mechanical Properties of Geopolymer Based on Laterite Deposit Sidrap, South Sulawesi
Authors: Subaer  , Haris Abdul , Irhamsyah A. , Akifah Nur , Amalia Nur Syamsih 
Published: June 2019

Abstract
Laterite soil deposit Sidrap, South Sulawesi, has been used as a raw material in the production of Na-Poly (sialate-siloxo) geopolymers. The main objective of this study is to investigate the physicomechanical properties of the resulting geopolymers synthesized from laterite Sidrap. Geopolymers were produced through the alkali-activation method of dehydroxylated laterite. Dehydroxylation was performed by using high-temperature furnace at 750°C for 4 hours. The resulting geopolymers were characterized based on X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), Fourier Transform Infra Red (FTIR) and Scanning Electron Microscopy (SEM) in order to examine their mineralogy and microstructure properties. The physicomechanical properties of geopolymer were examined through compressive and flexural strength. It was found that geopolymer based on Sidrap laterite exhibited good and high mechanical strength which make them suitable for various structural applications.
Comparative Study of The Difficulty Index of Items Displayed with The Paper-Based Test and The Computer-Based Testing Paper
Authors: Syahrul  , Suhardi Iwan , Lu’mu  
Published: June 2019

Abstract
The focus of this study is to analyze whether there are differences in the difficulty index of items if the same items are displayed with the Paper Based Test (PBT) model and the Computer-Based Testing (CBT) model. The PBT and CBT models have the same paradigm of measuring estimated abilities but have differences in the context and feel aspects. These differences include the number of items in the range of eyesight, use of tools, how to work on items, basic knowledge needs about computer operations, and habit factors. These differences can affect the results of estimating the ability of test participants. This study uses development methods and quantitative methods. Development methods are used to develop package items and CBT software. Two groups of respondents were used with equal ability to work on the same question package. One group uses the PBT model, and the other group uses CBT so that the response choices are obtained in each test model. The results of the respondent’s answer choices were then analyzed by the ITEMAN software to get the item difficulty index. The item difficulty index of each model was tested statistically using SPSS software, whether there was a significant average difference between the two test models. From the results of the study and analysis in classical theory, it can be concluded that statistically there are differences in the average difficulty index of the items if the same item is displayed with the PBT and CBT models. It was found that the items displayed with the PBT model had a more difficult tendency than when displayed with the CBT model.
Introduction to multi-messenger astronomy
Authors: Neronov Andrii 
Published: June 2019

AbstractThe new field of multi-messenger astronomy aims at the study of astronomical sources using different types of “messenger” particles: photons, neutrinos, cosmic rays and gravitational waves. These lectures provide an introductory overview of the observational techniques used for each type of astronomical messenger, of different types of astronomical sources observed through different messenger channels and of the main physical processes involved in production of the messenger particles and their propagation through the Universe.
Ground-based Gamma-Ray Astronomy: an Introduction
Authors: Sciascio Giuseppe Di 
Published: June 2019

Abstract
During the last two decades Gamma-Ray Astronomy has emerged as a powerful tool to study cosmic ray physics. In fact, photons are not deviated by galactic or extragalactic magnetic fields so their directions bring the information of the production sites and are easier to detect than neutrinos. Thus the search for γ primarily address in the framework of the search of cosmic ray sources and to the investigation of the phenomena in the acceleration sites. This note is not a place for a review of ground-based gamma-ray astronomy. We will introduce the experimental techniques used to detect photons from ground in the overwhelming background of CRs and briefly describe the experiments currently in data taking or under installation.
Introduction to Black Holes
Authors: Kunz Jutta 
Published: June 2019

Abstract
In these lectures an introduction to black holes in general relativity is presented. First the Schwarzschild black hole and its properties are discussed by studying the geodesics of light and matter. Several coordinate systems are introduced, and the maximal analytic extension of the Schwarzschild solution is obtained, including a white hole, a second universe, and a non-traversable wormhole. Subsequently the properties of the rotating Kerr black hole are discussed. These include, in particular, the ring singularity, the horizons, frame dragging and the ergoregion. As an interesting astrophysical application the photon region and the black hole shadow are addressed.
Composite structural elements of overhead lines as a means of increasing technical efficiency
Authors: Byk F , Kityshin V , Myshkina L , Kaminskaya E 
Published: June 2019

Abstract
Innovations in engineering and technologies depend not so much on emergence of new properties of the equipment, production process, system of management of the enterprise, but to a greater extent on their occurrence in the necessary set of combination. Technical and economic indicators reflecting technical and economic efficiency are usually used as characteristics. The degree of technical efficiency is determined by a combination of three properties – safety, reliability and productivity. These basic properties determine the economic effect of an innovative product performing certain functions, enabling to estimate their usefulness and significance. One of the means of increasing the overhead lines technical efficiency in the electric grid is the introduction of composite structural elements. The overhead line model is proposed for assessing the impact of elements on reliability as a component of technical efficiency. Changes in the reliability of the line when introducing innovative elements are calculated and priorities are defined.
Method development for the thermotechnical calculations utilizing reduced characteristics of the RDF fuels
Authors: Kornilova N V , Trubaev P A 
Published: June 2019

Abstract
The paper presents method of calculation of the heat leakage and efficiency by using method of indirect heat balance, utilizing data from gas analysis, which can be employed for operational evaluation plant operation during burning of different types of waste materials. Taking into account that practically only oxygen and carbon dioxide is being measured in the exhaust gases, calculation method for heat leakage with exhaust gases, using measurements of only this component, without utilizing carbon dioxide content in combustion products, was developed. Carbon dioxide and oxygen calculated percentage content in dry complete combustion products in actual air consumption was measured with consideration of incomplete combustion. Heat leakage for low power boilers and furnaces was analyzed, heat leakage calculation method for this kind of plants was introduced. Using design factors analysis of the solid fuel boilers for burning low-calorie fuel and wood waste, was developed dependence of the outside walls specific area of the boiler on the boiler’s efficiency. Based on the developed method for seven types of the RDF fuels, tabular and graphic dependences for reduced factors, characterizing heat leakage to the atmosphere and incomplete combustion, were introduced. Suggested method was tested for calculating losses in solid fuel water heating boiler with grate stoker and designed output power of 200 kW during burning of the briquetted waste materials.
The study of energy performance of biogas from agricultural waste
Authors: Suslov D Y , Ramazanov R S 
Published: June 2019

Abstract
The article is devoted to determination of energy indicators of the alternative source of energy - biogas derived from agricultural waste. The main energy indicators of the burning process of biogas fuel are lower heat value, Wobbe index, ignition range, flame propagation rate, as well as amount of oxygen and air required for complete combustion of biogas. The energy indicators of biogas produced from corn silage, technical fat, pig manure, cattle manure and poultry droppings are determined during the study. It has been found out that biogas obtained from technical fat and poultry droppings is characterized by the highest energy indicators, and biogas from corn silage - by the lowest indicators. Wobbe index of biogas is more than 2 times lower than index of natural gas. The biogas produced from technical fat has the highest rate of flame propagation - 23 cm/s, which is 1.5 times lower than the rate of flame of natural gas. Biogas has a wider ignition range than natural gas: the lower limit, the upper limit. The average value of the theoretic air volume required for complete combustion of biogas is 5.8 m3, which is 1.7 times less than the value for natural gas.