bluuebunny/crossref_metadata_2025_split huggingface dataset:
ON THE INFLUENCE OF THE POROSITY OF FINE-GRAINED CONCRETES AND DRY BUILDING MIXTURES ON CONTACT ZONE FROST RESISTANCE
Authors: Nesvetaev G. N. , Dolgova A. V. , Khadzhishalapov G. N. , Batdalov M. M. 
Published: November 2019

ObjectivesThis study was aimed at identifying the dependency of the frost resistance of the contact zone of fine-grained concretes (FGCs) obtained from dry building mixtures (DBMs) based on various Portland cements (PCs) with the content of various redispersable polymer powders (RPPs) from 0 to 3%.MethodThe research was based on 75 freeze-defrost cycles.ResultsAlthough the average dependency of adhesion with the base on additional porosity after 75 freeze-defrost cycles does not depend on the nature of NMV, adhesion is influenced by the cement type, the type and dosage of RPPs, as well as the nature of additional porosity. Since the content of organised volume of NMV in the form of VV has no effect on changes in adhesion with the concrete base following 75 freeze-defrost cycles, it is impractical to add more than 7% of NMV in the form of MS to the concrete mixture. The feasibility of using sulphate-resistant cement requires more research. The practical RPP dosage should be 1-2%. Some contradictions in conclusions on the volume of the introduced MS (by the strength criterion – at least 6%, by the criterion of frost resistance of the contact zone – no more than 7%) allows us to recommend the dosage of MS in RPP within 6-7% by volume for obtaining additional data on the MS effect on frost resistance.ConclusionThe dependency of compressive strength on additional porosity for FGCs without NMV and with NMV in the VV form after hardening during 28 days under normal conditions almost coincides with the known dependency of strength on porosity for cement stone; the maximum divergence of the values ???????? ????0 in the investigated range does not exceed 5%. The dependency of compressive strength on additional porosity for FGCs without NMV and with NMV in the MS form is similar to the known dependency of strength from porosity for cement stone; however, with increasing porosity, there is a slight decrease in the effect of porosity on strength. The dependency of compressive strength after 75 freeze-defrost cycles on additional porosity for FGC without NMV practically coincides with the previously obtained dependency of strength on porosity for cement stone; the maximum divergence of the values ???????? ????0 in the investigated range does not exceed 9%. For FGCs with NMV in the MC form, increasing porosity causes a slight decrease in the porosity effect on strength, and for FGCs with NMV in the VV form, the dependency has a quantitative and qualitative difference. The value of NMV in the VV form recommended for improving the frost resistance of FGCs by the strength criterion is at least 3%, MS – at least 6%. According to the criterion of the frost resistance of the contact zone and the strength of MS, the recommended dosage is 6-7%. It was not possible to disclose the direct impact of the VV volume on the frost resistance of the contact zone.
ESTIMATION OF THE RESISTANCE OF A THREE-LAYERED STRUCTURE WITH A PYRAMID DISCONTINUOUS FILLER TO DYNAMIC STRESS USING THE FINITE ELEMENT METHOD
Authors: Ustarkhanov O. M. , Muselemov H. M. , Abakarov M. S. , Alibekov M. S. 
Published: November 2019

Objectives. In this research, we set out to explore the possibility of increasing the resistance of three-layered panels with a pyramid filler filled with fibrous material to dynamic loads. Although issues associated with dynamic impact, penetration of solid bodies and breaking of solid barriers have always been of interest, particularly in military affairs, they are increasingly attracting the attention of researchers investigating various industrial problems.Method. A calculation was performed using the finite element method (FEM), which is widely used in various areas including construction. The possibility of calculating the movement of a solid body in fibrous material using the FEM, namely using the LIRA-SAPR software, was considered.Results. From the constructed models, it can be seen how the striker moves inside the fibrous material. Therefore, using the SC LIRA-SAPR allows the work of the filler to be assessed while a solid body moves inside it. The results of the calculation of striker movement in fibrous material depending on the speed of the body (striker) and the density of the filler (fibre) are shown in figures.Conclusion. The conducted numerical studies showed that a discrepancy between the calculation results for a three-layered structure under dynamic loads using the FEM and analytical dependencies was about 10%.
THERMOELECTRIC DEVICE FOR INTRACAVITARY HYPOTHERMIA
Authors: Ismailov T. A. , Evdulov O. V. , Khazamova M. A. , Ragimova T. A. , Magomadov R. A.-M. 
Published: November 2019

Objectives In this research, we aimed to develop a thermoelectric device (TED) for intracavitary hypothermia, to carry out experimental studies into its functional characteristics, as well as to develop treatment procedures using this device.Method A TED design for intracavitary hypothermia was developed, consisting of two thermoelectric batteries (TEBs) interconnected using an allmetal heat pipeline equipped with an influencing applicator and a liquid heat exchanger. Experimental studies of the device were carried out on a designed bench, which included a climatic chamber, a source of electrical energy and a temperature meter connected to a PC. Results Temperature changes at the control points of the device were recorded over time. Changes in the time taken to stabilise temperatures of the device tip, heat pipe and heat sink system at different TEB supply currents were investigated. Possible methods for treating some ENT diseases using the developed device are described.Conclusion It is shown that the temperature of the applicator is stabilised after approximately 4-4.5 minutes without load. At the same time, an increase in the current of the additional TEB from 5 to 12 A at the main TEB current of 23 A reduces the temperature from 237 K to 224 K. In the process of carrying out the procedures, the necessary level of a decrease in the temperature of a biological object can be reached at the supply current of the main and additional TEBs equal to 23 and 12 A, respectively, after 2.5 minutes. The full potential of the TED device will be realised through the developed of methods for treating ENT diseases.
PREDICTION OF THE USE OF REFRIGERANTS IN LOW-TEMPERATURE EQUIPMENT
Authors: Tatarenko J. V. , Mizin V. M. , Rachkovskiy N. O. 
Published: November 2019

Objectives Determination of prospects for the use of various refrigerants, as well as the potential for their interchangeability in low-temperature equipment in accordance with the conditions of the Kigali Amendment to the Montreal Protocol on substances that deplete the ozone layer.Method A computer simulation of heat exchange processes based on generally accepted dependencies was carried out and data for the construction of refrigeration machine elements obtained.Results R717 and R410A are recommended for use in medium- and low-temperature machines. R32 refrigerant is used in high-temperature refrigeration machines, especially in units with finned copper tubes. The low vapour content of R32 refrigerant prevents steaming of the upper layers of the tube bundle, leading to an increase in the level of the refrigerant in the evaporator and in the working area of the evaporator tube bundle. For R32, it is necessary to conduct additional research to find an alternative refrigerant. The highest values of the heat transfer coefficient are obtained when working on refrigerants R410A and R717.Conclusion The implemented algorithms can be helpful for obtaining the characteristics of the steam-compressor refrigerator elements across a wide range of boiling and condensing temperatures taking various factors and the percentage composition of the mixed working substance into account. This is a highly important consideration when converting the machines to run on alternative refrigerants.
STUDY OF A FLOWING-TYPE HEAT TRANSFER INTENSIFIER USED AS PART OF A THERMOELECTRIC SEA WATER DESALINATION SYSTEM
Authors: Yusufov Sh. A. , Bazaev A. R. , Bilalov B. A. 
Published: November 2019

Objectives To analyse the thermophysical processes in the thermoelectric heat transfer intensifier operating as part of a desalination system based on semiconductor thermoelectric converters.Method A mathematical model for the design of a desalter containing a thermoelectric heat exchanger, which provides for the use of heat flows by natural thermal conductivity due to so-called heat channels, is proposed. The proposed method of using additional heat sinks on the heat-absorbing side of the device and additional heat sources on the fuel side determines the need for a new mathematical model that differs from the known mathematical models describing heat transfer in the heat transfer flowing-type intensifier.Results The analysis of modelling results shows that a significant contribution to the temperature field of heat conductors is made when considering the heat transfer over the heat channels. The value of the contribution is the greater, the higher the thermal conductivity of the heat channels and the temperature difference between the heat conductors and the surface of the heat channels. In accordance with their purpose, flow-type thermoelectric heat transfer intensifiers (THTIs) for desalination applications must ensure efficient heat transfer from the cooled fluid flow to the heated fluid flow. The results show that, at a given limited length of the heat exchanger, the use of a thermoelectric battery together with heat channels allows equality of temperatures of heat conductors at the output to be achieved.Conclusion The modelling results show that, under the operating conditions of the thermal battery in intensifier mode, the length of the heat exchanger shall not exceed the value, at which the temperature of the heat conductor at the outlet becomes equal. The system solution provides the required length of the thermal battery, which allows equality of coolant temperatures to be achieved at the exit from the THTI operation mode. Following the logic of the desalter scheme under consideration, it is obvious that the reduction in the length of the heat exchanger, with all other things being equal, gives a reduction in the mass and size of the device as a whole.
SOFTWARE METHODS FOR INCREASING THE RELIABILITY OF AERODROME QUASI-DOPPLER AUTOMATIC RADIO DIRECTION FINDERS
Authors: Aslanov G. K. , Kazibekov R. B. , Mirzabekov T. M. , Musaibov R. R. 
Published: November 2019

Objectives To develop software methods that can improve the reliability of airfield quasi-Doppler automatic direction finders (ADFs).Method. Mathematical models and algorithms of software fault recovery of aerodrome quasi-Doppler automatic radio direction finders were developed. It is proposed to change the structure of aerodrome quasi-Doppler automatic radio direction finders.Results. Methods and algorithms for software improvement of the reliability of airfield quasi-Doppler automatic direction finders are proposed. A novel structural organisation of airfield quasi-Doppler automatic radio direction finders is given. New software methods are proposed for ensuring ADF operability in the event of a failure of the antenna system vibrators, both with the use of phase relations from any two pairs of orthogonally arranged ring antenna vibrators and with the use of the combinatorial method. The proposed organisational ADF scheme allows the average operating time per failure of one direction-finding channel to be increased by 4.4 times.Conclusion. The developed methods for ensuring ADF operability in the event of a failure of antenna system vibrators enable a simultaneous calculation of the azimuth and angle of position on the radio emission source. The use of the proposed method increases the potential reliability of airfield quasi-Doppler automatic direction finders without any hardware costs, as well as ensuring the adequacy of the calculated instrumental error values of airfield quasi-Doppler automatic direction finders relative to the real ones.
THERMOELECTRIC PROCESSES IN AN EFFICIENT LIGHT-EMITTING TRANSISTOR
Authors: Gadzhiev H. M. , Akhmedov M. E. , Gadzhieva S. M. , Kurbanova P. A. 
Published: November 2019

Objectives Development of energy-efficient light-emitting bipolar semiconductor structures.Method A method for transforming thermoelectric heat in bipolar semiconductor structures into optical-range electromagnetic radiation, which preserves the cooling effect on thermoelectric transitions, is proposed. Instead of transferring the information impulse electrically from the baseemitter light-emitting transition, the information is transferred directly to the light-absorbing basecollector transition by photons or following multiple re-reflections from mirror metal electrodes.Results Unlike conventional optocouplers discretely separated in space, the novel optocouplers described in the article are integrated into a single electronic component using the principle of LED radiation. As a result, light-emitting bipolar semiconductor structures will result in the creation of more powerful, faster and better integrated devices.Conclusion Light-emitting bipolar semiconductor structures will not only increase the reliability of electronic components across a wide range of performance characteristics, but also increase energy efficiency through the use of optical radiation recovery. The future development of light-efficient transistors improves integration and increases processor performance, at the same time as reducing the power consumption of the cooling system and the power supply of the device itself.
COMPUTER SCIENCE, COMPUTER ENGINEERING AND MANAGEMENT METHODICAL APPROACH TO EVALUATING THE PROBABILISTIC TIME PERFORMANCE INDICATOR OF AUTOMATED ADMINISTRATOR OPERATIONS IN INFORMATION PROTECTION SYSTEMS
Authors: Kadnova A. M. 
Published: November 2019

ObjectivesAt present, in accordance with the requirements of the guiding documents of the Federal Service for Technical and Export Control (FSTEC) of Russia, as well as international standards in the development and operation of protected automated systems, it is necessary to evaluate the effectiveness (general utility) of information protection systems. The article is devoted to the development of a method for assessing the ergotechnical characteristics of software information security systems for use the assessment of the general utility of such systems. The aim of the work is to develop a methodology for assessing the probabilistic indicator of the timeliness of typical operations for the administration of information security systems.MethodTo achieve this goal, user groups were created in order to perform typical administrative operations within the information protection system. The operation time for each group, recorded using the IOGraphV1.0.1 tool, was utilised to calculate the probabilities of timely execution of typical operations by the administrator according to a truncated normal distribution formula.ResultsAn assessment of a probabilistic indicator was carried out in order to evaluate the timeliness of operations performed by the administrator of the information protection system.ConclusionThe results can be used in a comprehensive assessment of the effectiveness (reliability) of the automated functioning of information security software systems when modelling and analysing the security of special-purpose informatisation facilities.
READING LITERACY AND METACOGNITIVE STRATEGY FOR PREDICTING ACADEMIC ACHIEVEMENT
Authors: Banat Siti Mahmudatul , Pierewan Adi Cilik 
Published: November 2019

The importance of reading literacy is shown in the results of achievement among international countries. Reading literacy has not become a culture for most students. Some students have not used reading strategies to improve their understanding. This will affect the academic achievement. This expost facto research design aims to examine: (1) wether reading literacy can predict academic achievement in knowledge and skill, (2) wether metacognitive strategy can predict academic achievement in knowledge and skill, and (3) wether reading literacy and metacognitive strategy together can predict academic achievement on knowledge and skill. The population is 543 students of three pilot senior high schools of Curriculum 2013 in Kulon Progo. The sample is 359 students established using the Table of Isaac and Michael. The instrument used is a questionnaire. The result is as follows. (1) Reading literacy can predict academic achievement in knowledge, but it cannot predict academic achievement in skill. (2) Metacognitive strategy can predict academic achievement in knowledge and skill. (3) Reading literacy and metacognitive strategy simultaneously can predict academic achievement on knowledge and skill. Therefore literacy habituation and the use of metacognitive strategies are strongly recommended to improve academic achievement of knowledge and skills.
Coagulation/Flocculation of Tannery Wastewater Using Immobilized Chemical Coagulants
Authors: Q. Imran , M. A. Hanif , M. S. Riaz , S. Noureen , T. M. Ansari , H. N. Bhatti 
Published: November 2019

Chemical coagulants were immobilized into bead form using sodium alginate to treat tannery wastewater samples. The used chemical coagulants were ammonium aluminium sulphate (NH4Al(SO4)2), aluminium sulphate (Al2(SO4)2, calcium carbonate (CaCO3), sodium citrate (Na3C6HsO7). The effect of the chemical coagulant dose and tannery wastewater pH was studied on wastewater electrical conductance (EC), total dissolved solids (TDS), sulphates, chlorides, phenolphthalein alkalinity, total alkalinity and chemical oxygen demand (COD). The quantity of various pollutants present in waste water was reduced after treatment. The optimized dose and pH for maximum decrease in EC and TDS were 5g/L and 7, respectively. The maximum reduction in the amount of sulphates and chlorides present in tannery wastewater was observed at dosage of 0.5g/L and pH 7. A dosage of 5g/L and pH 7 was also found most favorable for maximum reduction in values of COD, phenolphtalein and total alkalinity. The chromium concentrations in tannery wastewater before and after treatment were determined by atomic absorption spectrophotometer. A reduction in chromium concentration was observed after treatment. The promising results of the present study demonstrate that immobilization of chemical coagulants can make them more effective for wastewater treatment.
PENGARUH KEAKTIFAN MENGIKUTI LAYANAN BIMBINGAN KELOMPOK TERHADAP KEPERCAYAAN DIRI SISWA KELAS XI IPA DI SEKOLAH MENENGAH ATAS NEGERI 12 PEKANBARU
Authors: SARI SUCI LIA , DEVIANTI RIKA 
Published: November 2019

This research studies the correlation. The subject of this study students 'high school science class XI Pekanbaru District 12 and the object of this study is the influence of active service following the guidance of a group of XI grade students' self confidence Natural Science State Senior High School 12 Pekanbaru. The study population was a class XI science students who had attended group counseling services, amounting to 40 people. Given the population is so large, the writer uses Total Sampling. Techniques used to collect data a questionnaire prepared following the Likert scale. Once the data is collected and then analyzed by Product Moment correlation with the formula. Based on the data analysis can be concluded that (1) active service following the guidance of the class XI science students State Senior High School 12 Pekanbaru is located in the category of being which is equal to 76 316%. (2) confidence class XI science students State Senior High School 12 Pekanbaru is located in the category of 67.5%. (3) Based on the obtained correlation test correlation coefficient of 0703. The results of these correlation coefficients indicate that there are significant effect between self-esteem class XI science student State Senior High School 12 Pekanbaru. Effect of active service following the guidance of the group of XI grade students' self confidence Natural Science State Senior High School 12 Pekanbaru obtained from the coefficient of determination was 49%. Keyword:
Utility of the DIVA Score for Experienced Emergency Department Technicians
Authors: Shaukat Haroon , Neway Beemnet , Breslin Kristen , Watson Ar'Reon , Poe Kelly , Boniface Keith , Cohen Joanna S. 
Published: November 2019

Highlights
The DIVA score may be generalizable to IVs placed by experienced EDTs. Higher odds of first-time success in difficult patients with ≥5 years EDT experience. Early identification of difficult access may allow for aid of alternative technology. Likely first study to evaluate EDTs IV skills in patients with varying DIVA scores.
ANALYSIS OF FISCAL CAPACITY ON HUMAN DEVELOPMENT INDEX WITH MANDATORY SPENDING ON EDUCATION AND HEALTH AS INTERVENING VARIABLE (AN EMPIRICAL STUDY ON REGENCIES/CITIES IN JAVA)
Authors: Bawono Andy Dwi Bayu , Purbasari Heppy , Mujiyati Mujiyati 
Published: November 2019

Regional autonomy is aimed at enhancing the proximity between the local government and its people, in terms the local government will identify the weaknesses and strengths of its area from the highest to lowest level. This research attempts to find out the influence of the Fiscal Capacity Index on the Human Development Index with mandatory spending on education and health as the intervening variables. The research used empirical and explanatory research method to analyze the fiscal capacity index on the intervening variables. This study involved secondary data, which were obtained from certain agencies, namely the Regulation of Minister of Finance (PMK No.119/PMK.07/2017), the GRDP Realization Report of Regencies/Cities in Java Fiscal Year 2016, and the data published by the Central Bureau of Statistics of Regencies/Cities in Java in 2017. The results of the hypothesis analysis reveal that the fluctuation in the Fiscal Capacity Index in each region is able to influence the amount of mandatory spending in education and health. Meanwhile, the Path Analysis test indicates that the Fiscal Capacity Index has a stronger influence on the Human Development Index without any intervention from mandatory spending on education and health. Essentially, the Fiscal Capacity Index is the main variable that affects the Human Development Index.