bluuebunny/crossref_metadata_2025_split huggingface dataset:
ДОСЛІДЖЕННЯ ЕНЕРГОВИТРАТ ТАРІЛЧАСТИХ ЖИВИЛЬНИКІВ ДЛЯ СИПКИХ МАТЕРІАЛІВ
Authors: Бурмістенков О. П. , Біла Т. Я. , Стаценко В. В. 
Published: March 2021

Creation of mathematical models that allow determining the relationship between the design and technological parameters of the plate feeders and the energy consumption arising during their operation. Methodology. The work uses the classical mechanics principles, the contact interaction of solids theory and the mathematical modeling method. Findings. The paper considers the design and operation principle of a continuous plate feeder, defines its main design and technological parameters. The factors that create mechanical loads on the drive of the feeder plate are investigated. Mathematical models have been developed that make it possible to determine the moments of resistance and the power consumed by an electric motor during the equipment operation. The proposed models make it possible to determine the load on the drive in static and dynamic operation modes and take into account the design, technological parameters of the equipment and the bulk material physical and mechanical properties. The study results of the friction coefficients influence, the knife position and the force of its pressing on the plate surface, the plate rotation speed on the loads acting on the electric drive are presented. It has been found that the drive calculation is expedient for the mode in which the distance between the knife edge and the rotation axis of the plate is maximum, which corresponds to the operation at maximum load. It has been determined that a change in the feeder technological parameters (plate rotation speed, knife position) can lead to a change in the load on the electric drive by 86%, which must be taken into account when choosing a drive. Originality. Mathematical models of the continuous plate feeder operation have been developed, which make it possible to determine the relationship between the design and technological parameters of the plate feeders and energy consumption. Practical value. The results obtained make it possible to determine the load on the plate drive by the known design, technological parameters and bulk material physical and mechanical properties.
ДОСЛІДЖЕННЯ ВІДБИТТЯ УЛЬТРАЗВУКОВИХ ХВИЛЬ ВІД ОДНОШАРОВИХ ТЕКСТИЛЬНИХ ПОЛОТЕН ТА ДВОШАРОВИХ ТЕКСТИЛЬНИХ ПАКЕТІВ ІЗ РІЗНИМ РОЗМІРОМ ПОР
Authors: Здоренко В. Г. , Барилко С. В. , Лісовець С. М. , Шипко Д. О. , Василенко В. М. , Палій Б. М. 
Published: March 2021

Investigate the influence of single-layer textile fabrics and two-layer textile bags on the parameters of ultrasonic waves that interact with them. In particular, to investigate the dependence of the complex reflection coefficient of ultrasonic waves on the total thickness and basis weight of textile material. Methodology. The analytical part of the study consisted in obtaining an expression for the complex reflection coefficient of ultrasonic waves and in modeling its dependence on the thickness and basis weight of different textile materials. The proposed method of control of these technological parameters consists in irradiation of textile materials with ultrasonic waves with the subsequent reception of the waves reflected from textile material, their digitization and carrying out the computer analysis of the received results. Findings. Analytical expressions are obtained that relate the thickness and basis weight of single-layer canvases, two-layer textile bags with a complex spatial structure, on the one hand, and the reflection coefficient of ultrasonic waves from such materials, on the other hand. Analytical calculations were made and mathematical modeling was performed based on the results of theoretical research. Originality. As a result of theoretical studies, it is determined how the thickness and properties of each of the two layers of porous textile materials affect the reflection of ultrasonic waves. This makes it possible on the basis of ultrasonic measurements to determine both the total thickness of textile materials and their basis weight with the accuracy required for their production. Practical value. The obtained analytical dependences are another step towards the creation of control and measuring equipment to determine the properties of single-layer textile fabrics and two-layer porous textile bags. This will help determine the overall thickness and basis weight of materials with a complex spatial structure.
THERMODEPENDENT POLYCRYSTAL RESISTORS IN STARTERS OF ELECTRIC MOTORS OF LIFTING AND TRANSPORT MACHINES
Authors: Noskov Vladimir , Voronova Natal'ya 
Published: March 2021

The purpose of the work is to create an engineering procedure for the synthesis of starting rheostats on semiconductor thermo-resistors (STR) ensuring a simple and reliable start of electric motors. The developed procedure for the synthesis of starting rheostats based on STSs allows designing simple-formed, small cheap and reliable in operation starting devices of all kinds.
There is developed a universal method of the synthesis of STR-based starting rheostats based on two installed invariants of the similarity of starting processes connecting specified starting indices with the parameters of STR-based rheostats.
The method applies to different types of electric motors taking into account:
-	changing temperature conditions of environment;
-	quantitative indices of semiconductor material;
-	different types of thermo-resistors.
A corresponding algorithm of for the computation of STR-based starting rheostats is developed.
It is proved that a field of thermo-resistor rheostat application is dc and ac electric motors. In the paper there are shown design peculiarities of semiconductor thermo-resistor creation and a number of limitations on which a character of starting electric installations depends are formulated.
Disiplin Kerja dan Lingkungan Kerja Pada Kinerja Karyawan Produksi
Authors: Nurahaju Rini 
Published: March 2021

Sumber daya manusia merupakan aset paling berharga dalam perusahaan, tanpa manusia maka sumberdaya perusahaan tidak akan dapat menghasilkan laba atau menambah nilainya sendiri. Tujuan penelitian ini adalah untuk untuk mengetahui pengaruh disiplin kerja dan lingkungan kerja secara bersama – sama terhadap kinerja karyawan. Sampel dalam penelitian ini berjumlah 65 responden yang merupakan karyawan produksi pada PT.X. Teknik sampling yang digunakan adalah sampling jenuh. Penelitian menggunakan 3 (tiga) skala, yaitu disiplin kerja, lingkungan kerja, dan kinerja karyawan. Pendekatan yang digunakan adalah kuantitatif dengan metode survey dan menggunakan uji regresi linier berganda. Hasil uji regresi menunjukkan bahwa Disiplin kerja dan lingkungan kerja secara bersama – sama memiliki pengaruh yang signifikan terhadap kinerja karyawan pada PT.X dengan sumbangan persentase sebesar 40.1%.
Parasitic nematodes of wild and cultivated subtropical fruit plants in Central Asia
Authors: Khurramov Sh. Kh. , Bekmuradov A. S. 
Published: March 2021

The purpose of the research is studying the species composition and control measures against parasitic nematodes of wild and cultivated subtropical fruit plants of Central Asia.Materials and methods. We studied subtropical fruit crops in 198 farms and 1985 household plots located in various soil and climatic zones of over 20,675 hectares in Central Asia. The materials were collected in the autumn (September-October), spring (April-May) and summer (June-August) months in 1970–1990 by the route method. Study subjects were plant parasitic nematodes of 8 species of wild and cultivated subtropical fruit plants in the Central Asian republics. A modified Baermann funnel method was used to isolate plant nematodes from plants and soil near roots. In total, we collected and analyzed more than 5,400 plant and soil samples. To identify the species of plant parasitic nematodes, we used the Atlas of plant parasitic nematodes compiled at the Institute of Parasitology of the Russian Academy of Sciences, as well as morphometric indicators obtained according to the generally accepted De Mann formulae.Results and discussion. More than 129,000 specimens of plant parasites of 98 species were found in the studied wild and cultivated subtropical fruit crops and soil near their roots. In many farms of the Central Asian republics, we found southern root-knot nematodes, peanut root-knot nematodes, javanese root-knot nematodes, and cotton root-knot nematodes in mixed populations. In Uzbekistan, the prevalence in these crops was from 8 to 61.3%, in Tajikistan – from 78 to 98%, in Turkmenistan – from 6 to 98%, and in Kyrgyzstan – 33%. In addition to root-knot nematodes, representatives of ecto- and endoparasites of the genera Tylenchorhynchus, Merlinius, Quinisulcius, Rotylenchus, Helicotylenchus, Pratylenchus, Paratylenchus, Macroposthonia, Labocriconema and Xiphinema were parasitizing in the above subtropical cultures. Under production conditions, we tested Furadan at a dose of 40 kg/ha, Heterophos at a dose of 60 and 120 kg/ha, and Aldicarb at a dose of 40 kg/ha to control root-knot and other parasitic nematodes. Their efficacy ranged from 89 to 100%. We also used the soil solarization method developed by us, the efficacy of which was 95–98%.
Analisa Pengaruh Economic Value Added, Return on Asset dan Return on Ekuitas Terhadap Market Value Added Perusahaan Saham Teraktif Di Bursa Efek Indonesia
Authors: .Martias Andi 
Published: March 2021

Abstrak - Tujuan dari penelitian ini adalah untuk menguji secara empiris hubungan antara economic value added (EVA), return on asset (ROA), dan return on ekuitas (ROE) dengan market value added (MVA) di Bursa Efek Indonesia (BEI) untuk Perusahaan yang berkembang dengan Saham Teraktif pada periode penelitian periode 2015-2019. Jumlah sampel penelitian setelah diseleksi dengan teknik purposive sampling adalah sebanyak 7 perusahaan dimana merupakan saham teraktif. Analisis data yang digunakan adalah analisis regresi linier berganda menggunakan MINITAB. Hasil penelitian ini menunjukkan bahwa nilai koefisien determinasi (Adjusted R Square) yang menunjukan variabel independen mempengaruhi variabel dependen dan sisanya dipengaruhi oleh variabel lain diluar penelitian ini. Hasil Uji F menunjukkan bahwa variabel independen Economic Value Added (EVA) dan return on asset (ROA) secara simultan tidak berpengaruh signifikan terhadap Market Value Added (MVA) namun return on ekuitas (ROE) memiliki pengaruh hubungan yang signifikan dengan MVA ­dalam jangka panjang. Bagi calon investor yang hendak tidak hanya menanamkan dananya pada saham perusahaan dengan melihat faktor Market Value Added (MVA) karena berdasarkan hasil dari penelitian ini menunjukkan bahwa variabel Market Value Added (MVA) tidak berpengaruh signifikan terhadap pergerakan EVA, ROA dan ROE yang diterima oleh pemegang saham perusahaan dengan saham teraktif yang terdaftar di Bursa Efek Indonesia periode 2015-2019. Kata kunci: Market Value Added, Economic Value Added, Return on Asset, Return on Ekuitas, Saham Teraktif
Desain dan Analisis Tegangan Rangka Alat Simulasi Pergerakan Kendali Terbang Menggunakan Metode Elemen Hingga
Authors: Suprapto Ready Kresna Nanda , Wibawa Lasinta Ari Nendra 
Published: March 2021

Alat simulasi pergerakan kendali terbang merupakan alat peraga untuk menunjukkan mekanisme kerja dari sayap dan ekor pesawat terbang yang mendekati kenyataan. Alat ini bertujuan sebagai metode pembelajaran bagi calon pilot sebelum mengendarai sebuah pesawat terbang. Penelitian ini bertujuan untuk merancang dan menganalisis rangka alat simulasi pergerakan kendali terbang menggunakan metode elemen hingga. Analisis statik dilakukan menggunakan perangkat lunak SolidWorks 2017. Material rangka yang digunakan yaitu baja ASTM A36 dan ASTM A500 (square hollow section) dengan ukuran 50 x 50 x 1,2 mm dan 40 x 40 x 1 mm. Beban yang digunakan yaitu 375,25 kg yang merupakan beban sayap dan ekor pesawat. Hasil analisis menunjukkan rancangan rangka aman untuk menahan beban dinamis menggunakan baja ukuran 50 x 50 x 1,2 mm. Hal ini karena material ASTM A36 dan ASTM A500 untuk ukuran 50 x 50 x 1,2 mm memiliki faktor kemanan berturut-turut 2,162 dan 2,724. The flight control movement simulation tool is a visual aid to show the working mechanism of an airplane wing and tail close to reality. This tool aims as a learning method for aspiring pilots before driving an airplane. The study aims to design and analyze a flight control movement simulation frame using the finite element method. Static analysis was performed using SolidWorks 2017 software. The frame material used was ASTM A36 and ASTM 500 steel (square hollow section) with sizes of 50 x 50 x 1.2 mm and 40 x 40 x 1 mm. The load used is 375.25 kg, which is the weight of the aircraft's wing and tail. The analysis results show that a safe frame design to withstand dynamic loads uses 50 x 50 x 1.2 mm steel. The ASTM A36 and ASTM A500 materials for sizes 50 x 50 x 1.2 mm have a safety factor of 2.162 and 2.724, respectively.
Impact of microorganisms on mechanical properties changes of composite materials with organic filler
Authors: Szuszkiewicz Jarosław 
Published: March 2021

The beginning of the XXIst century is characterized by rapid development of polymer materials, including polymer composite materials, which consist of a natural organic filler (wood flour, sawdust, cellulose fiber, flax fiber, sisal fiber) and reinforcement carrier. In case of that kind of the fillers under the influence of weathering (humidity, temperature) they might be subject to biodegradation due to effect of microorganisms, including funguses, which are responsible for degradation of natural organic fillers. In case of the low melting temperature polymers (e.g. PE-LD) the processing temperature does not entirely eliminate some of the fungal spores. The paper has presented the research results of twelve months. The development of the microorganisms in the natural conditions was examined in a pure filler (sawdust) as well as in a composite. Simultaneously, change of one of the fundamental strength properties, which is the impact strength, was being tested. For the investigated composite the PE-LD as the matrix and a sawdust mixture of pine, larch and oak were used. The sawdust formed the composite in 30 %. The research results confirmed that in the natural conditions the microorganisms development depends on weathering which varies in the time of the year. The value of the V notch impact strength changed from 12.5 kJ/m2 for the composite in initial phase to the value of 6.7 kJ/m2 after twelve months operation, which is 50 %.
Study of Intraocular Pressure following Neodynium Yttrium Aluminium Garnet Laser Capsulotomy with the Use of Brimonidine: A Descriptive Cross-sectional Study
Authors: Manandhar Laxmi Devi , Gurung Nanda , Shrestha Koshal , Bhattarai Binita , Godar Manita , Shrestha Rahul 
Published: March 2021

Introduction: Posterior capsular opacification is a common complication after cataract surgery. Neodynium Yttrium Aluminium Garnet laser capsulotomy is still the preferred treatment for posterior capsular opacification. This study was done to determine the use of Brimonidine eye drop in preventing the rise of intraocular pressure post-Neodynium Yttrium Aluminium Garnet laser capsulotomy.
Methods: A descriptive cross-sectional study was conducted in Lumbini eye institute and research center, Bhairahawa, Nepal, in 200 eyes with posterior capsular opacification using Brimonidine from Feb 1, 2019, to July 30, 2019. The Institutional Review Committee approved the study with approval number 0237. A convenient sampling method was used. Pre-capsulotomy best-corrected visual acuity, slit-lamp examination of the anterior segment, and dilated fundus examination were done. Intraocular pressure was measured with Goldmann Applanation Tonometer. Post capsulotomy patients were evaluated after one hour, two hours, and two weeks for intraocular pressure and any complications. The statistical analysis was done using Statistical Package of Social Sciences version 20.0 statistical analysis software. The descriptive statistical analysis of the study was done after the collection of the data.
Results: Mean age of patients at presentation was 61.61±SD 1.09. The mean intraocular pressure following Neodynium Yttrium aluminum garnet laser capsulotomy using brimonidine at 1 hour was 12.73±3.3 mmHg.and two hours was 11.98±3.2 mmHg. The mean energy per pulse was 2.3±SD 0.3 mJ. The mean duration of posterior capsular opacification from cataract surgery was 22.28 weeks.
Conclusions: Neodynium Yttrium Aluminium Garnet laser capsulotomy had lower intraocular pressure after the Brimonidine eye drop procedure. The maximum mean reduction in intraocular pressure was observed after two hours.
On the attribution of the handwriting of the Athonite schema monk Seleucius (Trofimov)
Authors: Часин Евгений Васильевич 
Published: March 2021

Статья посвящена атрибуции почерков рукописей, посвящённых жизнеописанию афонского схимонаха Селевкия. Выявлены разные почерки, отмечены текстологические и лингвистические особенности рукописей, находящихся в книгохранилищах Афона и Москвы, считающиеся его автографом, но таковыми на самом деле не являющиеся.
This article deals with the attribution of handwritings of manuscripts dedicated to the biography of the Athonite schema Seleucus. Different handwritings are identified and the textological and linguistic features of manuscripts in the book repositories of Mount Athos and Moscow, which are believed to be his autograph, but are not in fact so, are noted.
Lower oxygen saturation targets in preterm infants are not associated with increased rates of pulmonary hypertension
Authors: Niccum M. , Spyropoulos F. , Levin J.C. , Petty C.R. , Mullen M.P. , Christou H. 
Published: March 2021

BACKGROUND: The optimal oxygen saturation target in preterm infants is not known. In this study, we aimed to assess the effect of lower oxygen saturation targets on the rate of bronchopulmonary dysplasia (BPD), retinopathy of prematurity (ROP), and pulmonary hypertension (PH) in preterm infants. METHODS: Retrospective cohort study comparing BPD, ROP, and PH incidence among two cohorts of infants born at≤32 weeks gestation with different oxygen saturation targets at≥34 weeks post-menstrual age (PMA): cohort 1, 94–98% ( n = 126); cohort 2, 92–97% ( n = 121). Groups compared by Chi-square test, t-test, and multivariable logistic regression. RESULTS: When comparing cohort 1 (average gestational age 29.8 weeks, average birth weight 1271g) with cohort 2 (average gestational age 29.6 weeks, average birth weight 1299g), there was no difference in rate of BPD (24% vs. 19%, p = 0.38), ROP (4% vs. 3%, p = 0.49), or PH (2% vs. 4%, p = 0.44). CONCLUSION: An oxygen saturation target of 92–97% at≥34 weeks PMA was not associated with a higher rate of PH or lower rate of BPD or ROP when compared with a higher target of 94–98%.
Pengenalan Dasar-dasar Investasi bagi Ibu-ibu PKK Kelurahan Babakan, Setu, Tangerang Selatan
Authors: Irawati Wiwit , Annisa Dea , Aprilia Erika Astriani , Utami Tri , Angraini Dila 
Published: March 2021

Investment is an important thing to do given the uncertainty in the future. Babakan Village is located in a position that makes it easy for people to be tempted to shop because of easy access to shopping centers. Through the PKK Mobilizing Team which is a government partner as well as a social organization that functions as a facilitator, planner, executor, as well as controller and with the aim of improving the welfare of the community, this PKM is held by providing counseling on the fundamentals of investment. PKM was attended by approximately sixty (60) participants of PKK ladies, the Secretary of the Village of Babakan and student representatives. This PKM has succeeded in fostering the enthusiasm and curiosity of participants to get to know the types of investments that are safe and can be done Key words: investment; PKK; investment risk; Babakan-SetuKeywords
PERENCANAAN PROYEK DALAM MENINGKATKAN EFISIENSI DAN EFEKTIFITAS JALAN TOL TEBANGI BESAR-KAYU AGUNG LAMPUNG DENGAN METODE PERT DAN CPM DI PT WK PADA PENGERJAAN PROYEK
Authors: Setiawan Rizki , Handoyo Handoyo 
Published: March 2021

Penelitain ini bertujuan untuk mengetahui metode pert dan cpm pada proyek jalan tol terbangi besar kayu agung dari penyelesaian yang dijadwalkan semula 238 hari sehingga lebih efisien 119 hari lebih awal dari yang dijadwalkan. Dengan demikian lebih efektif 50% dari waktu yang ditetapkan Perencanaan Proyek Pembangunan Jalan Tol Terbangi besar-Kayu agung Lampung memiliki waktu normal pengerjaan selama 238 hari dengan biaya total Rp 39,349,097,164.38. Setelah dilakukan percepatan dengan metode time cost trade off, waktu dan biaya proyek mengalami penurunan. Percepatan yang dilakukan menggunakan dua alternatif tersebut dilakukan hingga mencapai lintasan kritis jenuh. Alternatif yang pertama yaitu penambahan shift kerja menghasilkan biaya total akhir Rp 39,154,229,627.03 dengan waktu selesai proyek 119 hari. Dibandingkan dengan kondisi normalnya, alternatif tersebut lebih menghemat waktu selama 119 hari dengan selisih biaya Rp 194,867,537.35. Sedangkan untuk alternatif penambahan kapasitas alat mempunyai selisih waktu 49 hari dengan menghemat biaya sebesar Rp 143,350,087.94.
PENJADWALAN PREVENTIVE MAINTENANCE PADA MESIN MIXING DALAM PRODUKSI BRICK BATU TAHAN API DENGAN MENGGUNAKAN METODE AGE REPLACEMENT PADA PT XYZ
Authors: Ardiansyah Muhammad Firman , Widjajati Endang Pudji 
Published: March 2021

Salah satu cara untuk dapat meningkatkan tingkat produktivitas adalah dengan cara mengurangi waktu downtime pada mesin produksi. Secara umum, waktu downtime dibagi menjadi dua jenis, yaitu planned downtime dan unplanned downtime. Waktu downtime. Dapat diminimalisir dengan melakukan perawatan pencegahan/preventive maintenance. PT. XYZ adalah perusahaan yang bergerak di bidang produksi brick batu tahan api. Pada sistem perawatannya PT. XYZ masih menggunakan metode corrective maintenance dimana perbaikan akan dilakukan ketika telah terjadi kerusakan.
Maka dari itu dilakukan penelitian yang bertujuan untuk menentukan interval waktu perawatan menggunakan metode age replacement. Subjek dari penelitian ini adalah mesin mixing yang terdiri dari processing unit dan lifting unit.
Berdasarkan analisa hasil yang didapatkan diketahui bahwa dengan metode age replacement interval waktu penggantian komponen yang optimal pada komponen Processing Unit sebesar 32.000 menit, dan Lifting Unit sebesar 30.000 menit. Dengan interval jadwal perawatan pertama untuk processing unit adalah 23 hari dan untuk lifting unit sebesar 21 hari. Maka dengan penjadwalan ini diharapkan untuk selanjutnya dapat mengurangi waktu breakwdown perusahaan.