Determination Method of the Active Mg Content in the Melt of Ductile Iron by XU Zhen-yu, LI Da-yong, MA Xu-liang, WANG Li-hua

“…Within the scope of the Mg content of 0. 025% ～ 0. 06% ，the predicted value Mg% of magnesium content is correlated with corresponding thermal analysis solidification characteristic parameters significantly，so the calculated results are reliable. For the 120 statistical sample data，more than 80% of the prediction error is within ± 0. 004% for the regression formula of the Mg content，meeting the control requirements on line.…”
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Sample sizes for non-inferiority studies based on the difference between two proportions: a unified approach for difference, ratio and odds ratio models by Bruno Mario Cesana, Paolo Antonelli

“…Background: It is never easy to make sample size calculation for two-arm, non-inferiority studies with a primary proportion outcome not only because the different parameterisations involved in the difference, ratio, and odds ratio models lead to different non-inferiority margins and different sample size results, but also because of the different efficiency of the respective sample size formulae. …”
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MODEL PENGELOLAAN PEMBUKAAN LAHAN TANPA BAKAR PADA USAHATANI PADI DIKABUPATEN SANGGAU by Rizky Noviyanti, Erlinda Yurisinthae, Adi Suyatno

“…This study aims to analyze the management model of land clearing without burning carried out by farmers in Sanggau District and determine the factors that have a tendency of farmers to choose the method cultivate land. The sampling method is a method of sampling the probability of 100 respondents calculated using the Slovin formula. …”
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Sensitivity analysis of the lithospheric magnetic field at satellite altitude: the effects of the inducing field and the shape of the magnetic lithosphere by JinSong Du, YuKun Li, HouPu Li, ChangQing Yuan, KangAn Zhao, JiangSong Gui, Pan Zhang, ShaoFeng Bian

“…Here, we present alternative forward formulae that account for an arbitrarily high maximum degree of the inducing field and for a magnetic lithosphere of variable thickness. …”
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DETERMINATION OF DENTAL AGE OF 10-13 YEAR-OLD CHILDREN OF THE CARPATHIAN REGION OF UKRAINE BY THE CAMERIERE METHOD IN COMPARISON WITH THEIR CHRONOLOGICAL AGE by V.F. Makieyev, O.O. Isakova

“…The results of the studies have shown the suitability of the Cameriere formula modified during the process, based on the assessment of open tops and the number of teeth with completed root formation as a marker for the physiological development of the child and one that can be used to determine the child's age.Since studies had a limited age range on a particular sample of dental patients, further studies should evaluate the utility of this method in a larger sample of children in the extended age range of the given region of Ukraine and, if possible, adjust the formula we modified for the stability of the averaged indicators in different samples by age and sex.  …”
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Mathematical modelling for vaccine efficacy trials during the future epidemics of emerging respiratory infections by Soyoung Kim, Sun Hee Park, Sunhwa Choi, Wanho Lee, Suein Choi, Sungpil Han, Seunghoon Han, Dong-Gun Lee

“…Various RCT scenarios were tested to calculate VE estimates, sample size and power by varying RCT timings (using the epidemic peak as the base, [Formula: see text]10%, [Formula: see text]20%, [Formula: see text]30% relative to the time of peak) with follow-up durations (4 weeks as the base, and 8 and 12 weeks), recruitment durations (4 weeks as the base, and 2, 8, and 12 weeks), and non-pharmaceutical intervention (NPI) levels in reducing R0 by 10% and 20%. …”
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Theoretical and experimental study of plasmon oscillation dispersion in Si and Ge crystals by Z.A. Isakhanov, B.E. Umirzakov, G.T. Imanova

“…Calculation of the total electron energy loss with formula (5) shows that the form of the CLEE spectrum of primary electrons depends on the nature and magnitude of the electron density in a given direction and is in satisfactory agreement with the experimental data. …”
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Transfer of Impurities Determination Methods: Comparative Testing, Validation, Acceptance Criteria (Review) by N. A. Epshtein

“…Potential acceptance criteria – requirements to the permissible difference between results of transmitting and receiving laboratories – are given. The calculation formulas of the TOST test are considered, and the critical condition for the comparative testing of samples is given. …”
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Direct Adaption Methods for Linear and Circular Antenna Arrays by Ye. I. Glushankov, V. I. Tsarik

“…A new expression was derived for estimating circulant sample covariance matrices. Formulae that describe a modification of the Bareiss numerical Toeplitz matrix inversion algorithm for the case of complex Hermitian matrix were introduced. …”
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Probability Statistical Model for Measured Ground Motion Based on Generalized Extreme Value Distribution by FENG Pengfei, ZHOU Mi, LI Zhixuan, ZHU Guoqiang

“…Ultimately, probability statistical models for measured peak ground acceleration and seismic hazard calculation formulas for different types of sites are established.…”
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THE EFFECTIVE MEDIUM THEORY AS A TOOL FOR ANALYZING THE OPTICAL PROPERTIES OF NANOCOMPOSITES by A. N. Yurasov, M. M. Yashin

“…These effects are of both fundamental and practical interest. Using the Fresnel formula, the spectral dependences of the reflection and transmission coefficients of p-polarized light were constructed. …”
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Research on the Method of Depth-Sensing Optical System Based on Multi-Layer Interface Reflection by Chen Yu, Ying Liu, Linhan Li, Guangpeng Zhou, Boshi Dang, Jie Du, Junlin Ma, Site Zhang

“…An experimental platform was established under the same conditions, and the results were in accord with those of the simulation results, which validated the correctness of the formula for calculating the amplitude distribution of the diffracted light from the asymmetric aperture diaphragm.…”
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Numerical modeling of thermomechanical processes in heat-resistant alloys by Б. Кенжегулов, Я. Култан, Д.Б. Алибиев, А.Ш. Кажикенова

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Effect of zinc doping on electrical properties of LaAlO3 perovskite by Anastasia V. Egorova, Ksenia G. Belova, Irina E. Animitsa, Yelizaveta A. Morkhova, Artem A. Kabanov

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Reliability and Quality of Complex Systems by D.N. Novomeisky, M.N. Piganov, E.T. Eskibaev

“…The MathCAD mathematical package was used for calculations. A detailed analysis of the process of formation of the methodological error in determining the gap between the electrode and the film during the operation of the technological device showed that the main factors of its formation are the power and temperature of the torch acting on the surface of the sample. …”

Method for Determining Grain Losses Behind the Combine Header and Thresher During Soybean Harvesting by А. V. Lipkan’, A. A. Kuvshinov, V. S. Usanov, N. O. Smolyaninova, V. A. Sakharov

“…The authors described the sequence of laboratory and field assessment and formulae for determining natural grain losses, losses behind the header and their types, soybean losses behind the thresher and total losses behind the combine. …”
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Prediction of body fat through body adiposity index and bioelectrical impedance analysis in a sample of physically active Mexican students (Predicción de grasa corporal mediante e... by Paulina Yesica Ochoa-Martinez, Javier Arturo Hall-López, Ileana Solano-Pineda, Luis Roberto Monreal Ortiz, Yamileth Chacón-Araya, José Moncada-Jiménez

“…Methods: 78 volunteered university students (20.67 ± 1.69 yrs.) partake in study considered as highly active; the %BF determined by BIA was performed using Inbody 720; BAI was calculated by anthropometric assessment from hip and height measures calculated as follows: BAI=[hip circumference (cm)/height (m)1.5]–18. …”
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A Semi-Micro Extraction Spectrophotometric Determination of Iron Using 4-Nitrocatechol and Xylometazoline Hydrochloride by Petya V. Racheva, Antoaneta D. Saravanska, Galya K. Toncheva, Denitsa D. Kiradzhiyska, Nikolina P. Milcheva, Vidka V. Divarova, Ina P. Pencheva, Kirila T. Stojnova, Vassil B. Delchev, Kiril B. Gavazov

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A Novel Uranium Quantification Method Based on Natural <i>γ</i>-Ray Total Logging Corrected by Prompt Neutron Time Spectrum by Yan Zhang, Jinyu Deng, Bin Tang, Haitao Wang, Rui Chen, Xiongjie Zhang, Zhifeng Liu, Renbo Wang, Shumin Zhou, Jinhui Qu

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乳中脂溶性维生素A、D、E、K的快速检测方法研究 Fast analysis of fat-soluble vitamins A, D, E and K in milk by 胡韶华，张星河，卢永茂，陶冠军，韦伟，金青哲，王兴国 HU Shaohua, ZHANG Xinghe, LU Yongmao, TAO Guanjun, WEI Wei, JIN Qingzhe, WANG Xingguo

“…The UPLC-PDA method was applied to detect the contents of vitamins A, D, E, and K in human milk, other mammalian milks(cow milk, goat milk, and donkey milk) and infant formula. A principal component analysis (PCA) of the fat-soluble vitamin contents in different samples were also performed. …”
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