bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of the granular component type and the ratio of batch components on the properties of pressed alumina-chromia-zirconia-silica refractories with a mass fraction of 60 % Cr2O3
Authors: Mishnyova Yu. Ye. , Shulyk I. G. , Kushchenko K. I. , Kushchenko P. O. , Krakhmal Yu. O. 
Published: February 2022

Investigations on the influence of granular component type and ratio of batch components on the properties of pressed alumina-chromia-zirconiasilica refractories with a content of 60 % Cr2O3 have been carried out.
The optimal composition of batch, which includes scrap bakor products, scrap chromia products, alumina and metallurgical chromium oxide, was established.
This composition provides, after firing in an oxidizing atmosphere, obtaining refractory samples with an open porosity of 23.1 %, an apparent density of 3.52 g/cm3, cold crushing strength 120 N/mm2, thermal shockresistance 950 °C — water 5 thermal cycles.It was shown that, the introduction of granular tabular alumina intothe batch composition (instead of granular fused white alumina) leads to adecrease in the open porosity of samples, although to a lesser extent thanwith the introduction of scrap bakor products.It was established that, for samples containing 60 % metallurgicalchromium oxide, the introduction of scrap bakor products instead of fusedwhite alumina does not lead to a significant decrease in their open porosity.
It was shown that, firing in a reducing atmosphere and titanium oxide addition do not significantly affect the increase in apparent density and cold crushing strength of the studied samples.
Comparative studies of the corrosion resistance of alumina-chromiazirconia-silica refractories containing 60 % Cr2O3 of different composition to melts of E glass and basalt have found that, E glass and basalt impregnate refractories, and under the influence of glass, some samples were slightly corroded. The samples of developed optimal composition were less impregnated than samples of other compositions and were not corroded by E glass and basalt, which makes it possible to predict an increase in the stability of these refractories in service in glass furnaces for the production of glass fiber from E glass and basalt.
As a result of the carried out research, the technology of aluminachromia-zirconia-silica refractories with a content of 60 % Cr2O3 has been improved.
Properties dependence of castable samples from low-cement silicon carbide castable on the firing temperature and the gas atmosphere
Authors: Kushchenko P. O. , Primachenko V. V. , Shulyk I. G. , Savina L. K. 
Published: February 2022

The influence of firing temperature of 1000, 1100, 1200, 1300, 1400, 1580 °C and atmosphere (air and reducing) on the main properties of castable samples from low-cement silicon carbide castable grade of “NKBS” with a combined additive has been investigated.
It was shown that, in air with an increase in the firing temperature in the range 1000—1580 °C, the content of silicon carbide in the castable samples decreases. Up to temperatures of 1200—1300 °C, the content of silicon carbide in the castable samples practically does not change, and oxidation slows down due to the formation of a viscous melt of a glassy phase of an alumina silicate composition on the surface of silicon carbide grains. An increase in the firing temperature above 1300 °C leads to a more intense oxidation of silicon carbide grains to SiO2, which causes a change in the porosity, density and strength of the samples. As a result of the carried out studies, it was found that, the using temperature in the air of the above mentioned low-cement silicon carbide castable should not exceed 1300 °C.
It was found that, after firing in a reducing atmosphere in the temperature range of 1000—1580 °C in the samples of silicon carbide castable, the content of silicon carbide remains almost the same, and the density and strength increase, which ensures the efficiency of its use for lining thermal units operating in a reducing atmosphere up to temperatures of 1580 °C.
Calculation of eutectics temperatures and compositions of multicomponent sections of the system (Mg, Ca, Sr, Ba)O—Al2O3—Cr2O3
Authors: Korohodska A. N. , Shabanova G. N. , Logvinkov S. M. , Khrystych O. V. , Volobuev M. M. 
Published: February 2022

With change in the structure of metallurgical production in Ukraine, the range of used refractory materials is expanding: the share of unshaped highquality refractories is growing, since this eliminates the time-consuming and energy-consuming operation of firing piece products, and also simplifies the operation of creating a lining layer. To establish the maximum possible operating temperature of materials developed on the basis of compositions of the optimal regions of multicomponent oxide system (Mg, Ca, Sr, Ba)O— Al2O3—Cr2O3, it was necessary to calculate the temperatures and compositions of the eutectics of binary, ternary and four-component sections, which was the purpose of this study.
For calculations in binary sections, the Epstein — Howland method is most acceptable, and in three- and four-component sections — the solution of nonlinear equations system. It was found that to obtain a refractory unshaped material based on calcium aluminium chromite cement with periclase as a filler, it is necessary to adjust the phase composition of the cement towards an increased CaCr2O4 content, and the total composition must contains at least 75 wt. % periclase or magnesium spinel. In addition, in the case of alumina hydrates formation as a result of cement hydration processes, magnesium spinel will be synthesized as part of a refractory unshaped material during service. To obtain refractory unshaped materials based on strontium aluminium chromite cement and periclase as filler, it is necessary to increase the SrAl2O4 content and minimize the Sr3Al2O6 content in the cement composition, while the filler content in the composition can vary within wide limits, since the melting temperature of such compositions will be more than 1700 °C. To create refractory unshaped materials based on barium aluminium chromite cements, it is necessary to increase the content of BaAl2O4 in the cement composition as the most hydraulically active and refractory component and the composition of the composite material should be low- or ultra-low-cement in order to increase the operating temperature. In addition, in the case of chromium hydroxides formation during the hydration of aluminium chromite cement, chromium spinel will be synthesized in the composition during service, increasing the refractoriness of resulting composition. Thus, by varying the type and phase composition of cement and the ratio of cement and aggregates in the concrete composition, it is possible to obtain unshaped materials with a wide operating temperature range for use in heat-stressed areas of high-temperature aggregates.
Influence of reactive alumina type on the properties of corundumspinel castables (review)
Authors: Chaplianko S. V. , Nikichanov V. V. 
Published: February 2022

In order to improve technology manufacture of high-quality refractory castables, have been executed review and analysis of some individual results on foreign studies aimed at researching the influence of reactive alumina’s type (in terms of specific surface area, particle size distribution, chemical purity) on properties of corundum-spinel castables of various compositions.
It had been shown technological efficiency of corundum-spinel castables application:
— composite material of E-SY288 brand in comparison with alumina of СL370 brand in terms of samples’s apparent porosity and cold modulus of rupture improving, regardless of the firing temperature;
— alumina with the lower Na2O content (0.32 %) and particle size (d50 = 2.51 microns) in terms of samples’s permanent linear changes and cold modulus of rupture improving, fired at 1450 °C samples;
— alumina with the minimum Na2O content (0.034 %) and the larger specific surface area (4.32 m2/g) in terms of mass’s flowability and samples’s apparent porosity, cold and hot modulus of rupture improving, regardless of the firing temperature;
— alumina with the high Na2O content (0.11 %) and the smallest specific surface area (3.01 m2/g), but with a specific particle size distribution, in terms of samples’s cold crushing strength and cold modulus of rupture improving, regardless of the firing temperature, as well as alumina with the highest specific surface area (7.40 m2/g) in terms of samples’s abrasion resistance improving, alumina with an average specific surface area (4.68 m2/g) in terms of samples’s hot modulus of rupture (at temperatures of 1400 and 1500 °C) and thermal spalling resistance improving.
Procedure of determination of the cold compressive strength of samples of refractory inserts for composite plates of shuttles
Authors: Kushchenko P. O. , Dunikov O. V. , Rebrova O. M. , Grytsyuk L. V. , Synyukova O. I. 
Published: February 2022

The slide gate is the most advanced type of casting device. The design of this gate is based on the action of two refractory plates, which are in close contact with each other, one of which slides on the other, fixed motionlessly. Sliding gates can be of two types: with a lower movable plate, which carries out a back-and-forth movement in the horizontal direction using a hydraulic cylinder, and with a lower movable plate, which rotates around an axis. The shutter of first type is called a slide gate; the second is a rotary shutter.
Monitoring of properties in particular strength of refractory inserts facilitates increase in operation reliability of constituent plates of sliding shutters in steel casting ladles. However, it is not possible to apply the existing standards for the compressive strength determination of these refractory products, because these standards do not provide for test samples with dimensions less than 20 mm. That's why the procedure MB 322-39-2021 was developed and implemented by JSC “URIR named after A. S. Berezhnoy” with the purpose of monitoring of cold compressive strength of refractory inserts for constituent plates of sliding shutters. According to this procedure, a method for measuring the compressive strength is used: the cross-sectional area of the test sample is determined, the maximum compressive load that leads to the test sample failure is measured, and the compressive strength is calculated.
Interlaboratory comparison of the work quality of chemical-analytical units of a number of refractory industry enterprises in Ukraine in 2020
Authors: Birukova O. V. , Varganov V. V. , Konchynko N. M. 
Published: February 2022

One of the ways to check the correctness of international standards use is interlaboratory comparison of the work results of testing laboratories. Such work has been carried out by JSC “The URIR named after A. S. Berezhnoy” for more than 20 years and allows one to assess the reproducibility and repeatability of chemical analyzes results of refractories and refractory raw materials at the manufacture of refractories and their certification in the both the chemical-analytical unit of the institute and laboratories of partner enterprises.
The interlaboratory comparison of work quality of chemical-analytical units of a number of refractory industry enterprises in Ukraine (JSC “KDZ”, JSC “CRP”, JSC “VRP”) and JSC “The URIR named after A. S. Berezhnoy” was carried out. The discrepancy between the average results of chemical analysis in the chemical-analytical unit of refractory enterprises and in the laboratory of institute did not exceed the permissible value of γ in terms of ND. The work quality of chemical-analytical units of central refractory laboratories of all the above mentioned refractory enterprises was satisfactory. Recommendations for improving the accuracy of the chemical analysis results in the refractory enterprises laboratories that participated in the tests were not required.
PENGARUH EMOTIONAL BRANDING DAN CUSTOMER SATISFACTION TERHADAP BRAND LOYALTY Survei pada pembeli Sophie Paris di Outlet Pandaan Pasuruan
Authors: Afida Siti Nur , Wusko Any Urwatul 
Published: February 2022

Tujuan Penelitian ini ada 3 yaitu: 1) menganalisis dan menjelaskan pengaruh variabel emotional branding terhadap brand loyalty 2) menganalisis dan menjelaskan pengaruh variabel customer satisfaction terhadap brand loyalty 3) menganalisis dan menjelaskan pengaruh variabel emotional branding dan customer satisfaction secara simultan terhadap brand loyalty. Jenis penelitian yang digunakan adalah jenis penelitian kausal. Metode pengambilan sampel dengan teknik survai. Populasi dan sampel dalam penelitian ini adalah pembeli di Outlet Sophie Paris di Pandaan dengan jumlah sampel 100 dan teknik pengambilan sampelnya adalah purposive sampling. Metode analisis data yang digunakan adalah Regresi Linier Berganda.Hasil Penelitian menunjukkan bahwa 1) Emotional branding berpengaruh positif dan signifikan terhadap brand loyalty, 2) Customer satisfaction berpengaruh positif dan tidak signifikan terhadap brand loyalty,, 3) Secara simultan emotional branding, customer satisfaction berpengaruh positif dan signifikan terhadap brand loyalty
Pengaruh Pendidikan Kewirausahaan dan Karakter Wirausaha Terhadap Motivasi Usaha
Authors: Phutry Lellyzia  
Published: February 2022

English
This study aims to determine the effect of the variables of entrepreneurship education and entrepreneurial characteristics in its role in influencing entrepreneurial motivation in students of UB's business administration study program. This type of research used in this research is explanatory research with a quantitative approach. The method used in sampling is slovin formula with random sampling techniques. Data collection techniques using questionnaires To collect data using questionnaires and observation. The analysis technique used is descriptive statistical analysis, inferential statistical analysis, multiple linear regression analysis, classic assumption test and hypothesis test. The results showed that both entrepreneurship education and entrepreneurial characteristics had a positive influence on entrepreneurial motivation
Keywords: Entrepreneurship Education, Characteristics of Entrepreneurship, Entrepreneurial Motivation
Abstrak
Penelitian ini bertujuan untuk mengetahui pengaruh variabel pendidikan kewirausahaan dan karakteristik kewirausahaan dalam perannya mempengaruhi motivasi wirausaha pada mahasiswa program studi administrasi bisnis Universitas Brawijaya. Jenis penelitian yang digunakan dalam penelitian ini adalah penelitian explanatory dengan pendekatan kuantitatif. Metode yang digunakan dalam pengambilan sampel yaitu rumus slovin dengan teknik random sampling. Teknik pengumpulan data menggunakan kuesioner Untuk mengumpulkan data menggunakan kuesioner dan observasi. Teknik analisis yang digunakan adalah analisis statistik diskriptif, analisis statistik inferensial, analisis regresi linier berganda, uji asumsi klasik dan uji hipotesis. Hasil penelitian menunjukkan bahwa baik pendidikan kewirausahaan maupun karakteristik kewirausahaan memiliki pengaruh positif terhadap motivasi berwirausaha
Keywords: Pendidikan Kewirausahaan, Karakteristik Kewirausahaan, Motivasi Wirausaha
PU-DetNet: An Efficient Deep Unfolding aided Smart Sensing Framework for Cognitive Radio
Authors: Shah Sanket , Patel Dhaval , Soni Brijesh , Lopez-Benitez Miguel , Govindasamy Siddhartan 
Published: February 2022

<p> Spectrum sensing in cognitive radio (CR) paradigm can be broadly categorized as analytical based and data-driven approaches. The former is sensitive to model inaccuracies in evolving network environment, while the latter (machine learning (ML)/deep learning (DL) based approach) suffers from high computational cost. For devices with low computational abilities, such approaches could be rendered less useful. In this context, we propose a deep unfolding architecture namely the Primary User-Detection Network (PU-DetNet) that harvests the strength of both: analytical and data-driven approaches. In particular, a technique is described that reduces computation in terms of inference time and the number of floating point operations (FLOPs). It involves binding the loss function such that each layer of the proposed architecture possesses its own loss function whose aggregate is optimized during training. Compared to the state-of-the-art, experimental results demonstrate that at SNR= -10 dB, the probability of detection is significantly improved as compared to the long short term memory (LSTM) scheme (between 39% and 56%), convolutional neural network (CNN) scheme (between 45% and 84%), and artificial neural network (ANN) scheme (between 53% and 128%) over empirical, 5G new radio, DeepSig, satellite communications, and radar datasets. The accuracy of proposed scheme also outperforms other existing schemes in terms of the F1-score. Additionally, inference time reduces by 91.69%, 90.90%, and 93.15%, while FLOPs reduces by 62.50%, 56.25%, 64.70% w.r.t. LSTM, CNN and ANN schemes, respectively. Moreover, the proposed scheme also shows improvement in throughput by 56.39%, 51.23%, and 69.52% as compared to LSTM, CNN and ANN schemes respectively, at SNR = -6 dB. </p>
Robust Optimal Control for Demand Side Management of Multi-Carrier Microgrids
Authors: Carli Raffaele , Cavone Graziana , Pippia Tomás , De Schutter Bart , Dotoli Mariagrazia 
Published: February 2022

<p>This paper focuses on the control of microgrids where both gas and electricity are provided to the final customer, i.e., multi-carrier microgrids. Hence, these microgrids include thermal and electrical loads, renewable energy sources, energy storage systems, heat pumps, and combined heat and power units. The parameters characterizing the multi-carrier microgrid are subject to several disturbances, such as fluctuations in the provision of renewable energy, variability in the electrical and thermal demand, and uncertainties in the electricity and gas pricing. With the aim of accounting for the data uncertainties in the microgrid, we propose a Robust Model Predictive Control (RMPC) approach whose goal is to minimize the total economical cost, while satisfying comfort and energy requests of the final users.</p>
<p>In the related literature various RMPC approaches have been proposed, focusing either on electrical or on thermal microgrids. Only a few contributions have addressed the robust control of multi-carrier microgrids. Consequently, we propose an innovative RMPC algorithm that employs on an uncertainty set-based method and that can provide better performance compared with deterministic model predictive controllers applied to multi-carrier microgrids. With the aim of mitigating the conservativeness of the approach, we define suitable robustness factors and we investigate the effects of such factors on the robustness of the solution against variations of the uncertain parameters. We show the effectiveness of the proposed RMPC approach by applying it to a realistic residential multi-carrier microgrid and comparing the obtained results with the ones of a baseline robust method.</p>
<p><br></p>
<p>Postprint accepted for publication in <em>IEEE Transactions on Automation Science and Engineering (T-ASE)</em>.</p>
<p><br></p>
<p><strong>How to cite</strong>: R. Carli, G. Cavone, T. Pippia, B. De Schutter, and M. Dotoli, ”Robust Optimal Control for Demand Side Management of Multi-Carrier Microgrids,” <em>IEEE Transactions on Automation Science and Engineering</em>, vol. 19, no. 3, pp. 1338-1351, July 2022.</p>
<p>DOI: <a href="https://doi.org/10.1109/TASE.2022.3148856" target="_blank">https://doi.org/10.1109/TASE.2022.3148856</a><br>
</p>
Perancangan Sistem Informasi Penginputan Data Kapal pada PT Barakomindo Shipping Cabang Sorong Berbasis Web
Authors: Huwae Hesty Ningsih , Ramadhani Indri Anugrah , Matahari Matahari 
Published: February 2022

Penelitian ini bertujuan untuk menghasilkan sistem informasi penginputan data kapal pada di PT Barakomindo Shipping cabang Sorong berbasis web serta bagaimana cara penggunaannya. Metode Penelitian yang digunakan dalam pembuatan sistem informasi ini adalah jenis penelitian R&D (Research and Development) dengan model perancangan Prototype. Metode pengujian sistem menggunakan black box testing, yang di uji oleh validator sistem dengan hasil pengujian sesuai tanpa terjadi eror pada sistem. Peneliti juga melakukan uji coba responden yang dilakukan pada staff PT Barakomindo Shipping. Berdasarkan hasil pengujian tersebut maka dapat dinyatakan bahwa Sistem Informasi Penginputan Data Kapal pada PT Barakomindo Shipping layak untuk digunakan.
Analisa Decision Tree Untuk Menentukan Jadwal Kerja Karyawan Restoran Pada Hari Libur
Authors: Martini Martini , Anwar Rian Septian , Masshitah Sari 
Published: February 2022

Pelayanan yang baik merupakan salah satu indikator bagi usaha restoran agar dapat memuaskan pelanggan. Semakin cepat pelanggan mendapatkan pelayanan terbaik dari restoran maka dapat meningkatkan margin penjualan. Hal ini juga berkaitan dengan loyalitas pelanggan yang diharapkan dapat membeli kembali di restoran tersebut. Restoran terlihat ramai pengunjung pada hari-hari libur sehingga pelayanan seluruh karyawan semakin bertambah sibuk. Pelayanan yang baik tidak terlepas dari peran manajemen restoran dalam membuat keputusan untuk mengatasi masalah di hari libur. Jika pelanggan tidak dilayani dengan baik maka dikhawatirkan pelanggan akan beralih ke restoran lain yang menyediakan produk sejenis. Penelitian ini bertujuan untuk menentukan kebutuhan jumlah karyawan khususnya di hari libur yang banyak dikunjungi pelanggan. Metode yang digunakan dalam penelitian ini adalah algoritma C4.5 untuk membangun Decision Tree yang menghasilkan keputusan sesuai masalah yang diteliti. Hasil dari penelitian ini berupa keputusan untuk mengatur jadwal shift karyawan atau menambah karyawan sesuai kebutuhan restoran khusus pada hari libur saja berdasarkan kedisiplinan karyawan.
Knowledge and Attitude of Pregnant Women Related to Hyperemesis Gravidarum at Jagong Health Center, Jagong Jeget District, Central Aceh Regency in 2021
Authors: Dewi Nova Ratna , Sri Wahyuni M.S.  , Hidayana  
Published: February 2022

Background. Continuous hyperemesis gravidarum can cause a lack of food and fluids that can affect fetal development. Lack of food and fluids or dehydration has a bad effect on the unborn child as well as on the mother herself. This study aims to determine the extent of knowledge and attitudes of pregnant women to the incidence of hyperemesis gravidarum in the working area of the Jagong Health Center, Jagong Jeget District, Central Aceh Regency in 2021.
Methods. This type of research is descriptive, the sample of this research is pregnant women in the working area of the Jagong Health Center totaling 30 people. Data were collected and measured using a questionnaire.
Results. Mother's knowledge about hyperemesis gravidarum has a good level of knowledge as many as 15 respondents (50%), attitudes of pregnant women with hyperemesis gravidarum have a level of a positive attitude as much as 28 (80%), while knowledge of pregnant women and attitudes of pregnant women with hyperemesis gravidarum as much as 15 ( 50%).
Conclusion. It is expected that pregnant women should be able to increase their knowledge and seek more information from health workers and media mass to increase the knowledge of pregnant women about health, especially regarding the incidence of hyperemesis gravidarum.