Comprehensive Archaeological and Palaeoecological Studies of the Holocene Chronosequence in the Southern Taiga of the Middle Yenisei

The article presents the results of a comprehensive interdisciplinary analysis of archaeological and palaeoecological data. The aim of the study was to identify climatic changes in the habitat and their impact on the formation of the palaeoeconomics of the ancient population, on the expansion or reduction of the area of archaeological cultures with foraging and producing economy. Based on the analysis of palaeosignals obtained by a complex of methods (pollen, botanical analysis of peat, charcoal analysis, determination of the ash content of sediments), the following intervals of changing conditions were identified: 7400—6800 calibrated years before present (cal. BP) — humidity reduction, 4850—4400 cal. BP — an increase in humidity, 3850—3150 cal. BP — decrease in humidity, 3150—2000 cal. BP — stable humid, with 1600 cal. BP — moisture reduction, 1250—700 cal. BP — minimal moisture. Changes in conditions are consistent with changes in the boundaries of the subzone of the southern taiga and forest-steppe, as well as with the range of cultures of Siberian hunters, fishers, gatherers and pastoralists. The results can be projected over the entire Siberian region.

Pengaruh Giro Wajib Minimum Dan Loan To Deposit Ratio Terhadap Return On Asset

This study aims to determine the effect of the Giro Wajib Minimum and Loan to Deposit Ratio on Return On Assets in banking companies included in Book IV for the period 2014-2019. The method was used a descriptive qualitative method with data obtained secondary from the financial statements of each bank. Data were analyzed using descriptive qualitative analysis methods with multiple linear regression analysis, determination analysis, simultaneous significance test (F test) and partial significance test (t test). The results of this study indicate that: 1) Statutory Reserves have no effect on ROA, 2) Loan to Deposit Ratio has a negative and significant effect on ROA 3) The Statutory Reserves and Loan to Deposit Ratio have a significant effect on Return On Assets. Keywords: Statutory Reserves, Loan to Deposit Ratio, dan Return On Assets

Characterization of Nanofluids Using Multifractal Analysis of a Liquid Droplet Trace

This paper presents a novel approach to the analysis of nanofluids by using a nonlinear multifractal algorithm. Multifractal analysis allows to present detailed local descriptions of complex scaling behavior using a spectrum of singularity exponents. Nanoliquids prepared from nanoparticles of SiO2 (~0,01g) suspended in 100 ml of demineralized water and in 100 ml of 99,5% isopropanol were subjected to classical methods of analysis: determination of the contact angle, determination of the zeta potential, pH, and examination with a particle size analyzer. The obtained results show that the obtained nanofluid is stable and well prepared, while further nonlinear analyzes show that the usage of multifractal analysis for nanofluids can significantly improve both the process of analyzing this issue as well as its preparation, based on the multifractional spectrum.