Effect Of Structure Size Research Articles

Specimen and aggregate size effect on the dynamic fracture parameters of concrete under high loading rates

This paper presents a comprehensive experimental investigation of the dynamic size effect and fracture characteristics of concrete. The study involves about two hundred concrete specimens with various maximum aggregate sizes subjected to tensile loading ranging over five orders of magnitude. The effect of structural size and aggregate size on the dynamic strength of concrete is explored using the Work of Fracture Method (WFM) and Size Effect Method (SEM). The experimental results indicate a considerable size effect in concrete subjected to dynamic loading, although the size effect on concrete nominal strength is weakened by increasing the loading rate and aggregate size.

Pengaruh Profitabilitas, Likuiditas, Struktur Modal dan Kualitas Auditor Terhadap Ketepatan Waktu Penyampaian Laporan Keuangan

This study was conducted to analyze the effect of profitability, liquidity, capital structure and company size on the timeliness of submitting financial reports to manufacturing companies in the consumption sector listed on the Indonesia Stock Exchange for the period 2015 – 2018. The method used in sampling using purposive sampling method with a sample of obtained as many as 17 companies. This study uses multiple regression analysis using SPSS v.25 which consists of descriptive statistics, classical assumption test (normality test, multicollinearity test, heteroscedasticity test and autocorrelation test) and hypothesis testing (t test, F test and coefficient of determination). The results of this study indicate that partially the profitability and liquidity variables affect the timeliness of financial report submission, while the capital structure and auditor quality variables have no effect on the timeliness of financial report submission. Meanwhile, simultaneously, the variables of profitability, liquidity, capital structure, and quality of auditors affect the timeliness of submitting financial statements

Pengaruh Struktur Kepemilikan Manajerial, Leverage, Kompensasi Bonus dan Ukuran Perusahaan Terhadap Manajemen Laba

Earnings Management is one of the efforts made by companies to manipulate the numbers in the financial statements so that the company's financial statements can be seen in good condition for investors and other stakeholders. This study aims to determine the effect of managerial ownership structure, leverage, bonus compensation and company size on earnings management in manufacturing companies listed in BEI 2017-2019. The sampling method in this study used purposive sampling so that the researchers found 55 companies that match the criteria in 2017- 2019, so that this study analyzed as many as 165. The testing technique in this research is in the form of classical assumption test, normality test, autocorrelation test, multicollinearity test, heteroscedasticity test, determination coefficient test and T test. The results of the study indicate that Managerial Ownership Structure, Leverage, Bonus Compensation and Company Size do not significantly influence earnings management.

Analisis Faktor-Faktor Yang Mempengaruhi Kebijakan Hutang Dengan Profitabilitas Sebagai Variabel Moderasi

The purpose of this study is to analyze and obtain empirical evidence regarding the effect of asset structure, institutional ownership, and company size on debt policy, and to see whether profitability can moderate the effect of company size on companies listed on the Indonesia Stock Exchange during the period of 2017-2019. This research was conducted by taking 75 samples of companies, using purposive sampling technique and processed using the EViews version 11 program released in 2019. Based on the research, the results show that the asset structure and institutional ownership individually do not have a significant effect on debt policy while company size has a positive influence and significant effect on debt policy, and lastly, profitability cannot moderate the effect of company size on debt policy. The implication of this study is the need to increase the size of the company, as it grows bigger can be able to make management increase its debt policy making which is can be used to finance various company needs.

Faktor-Faktor Yang Mempengaruhi Financial Performance Pada Perusahaan Properti

The purpose of this study is to obtain empirical evidence about the effect of intellectual capital, capital structure, institutional ownership, and firm size on financial performance of property company listed on Indonesia Stock Exchange during 2017 – 2019. Sample was selected using purposive sampling method and the valid data was 28 companies. For processing the data, this study used software SPSS version 22. The results showed intellectual capital and institutional ownership have a positive and significant impact on financial performance, while capital structure and firm size have an insignificant impact on financial performance. The implication of this study is need to increase intellectual capital and institutional ownership that will increase the financial performance, need to manage debt and interest on debt carefully, and increasing number of assets has not been able to ensure that the company's profits have increased.

MoS2-based multiple surface plasmonic coupling for enhanced surface-enhanced Raman scattering and photoelectrocatalytic performance utilizing the size effect.

MoS2-based heterostructures have received increasing attention for not only surface-enhanced Raman scattering (SERS) but also for enhanced photoelectrocatalytic (PEC) performance. This study presents a hydrothermal method for preparing vertical MoS2 nanosheets composed of in situ grown AuNPs with small size and chemically reduced AgNPs with large size to achieve the synergistic enhancement of SERS and PEC properties owing to the size effect of the plasmonic structure. Compared with pristine MoS2 nanosheets and unitary AuNPs or AgNPs composited with MoS2 nanosheets, the ternary heterostructure exhibited the strongest electromagnetic field and surface plasmon coupling, which was confirmed by finite-difference time-domain (FDTD) simulation and absorption spectra. In addition, the experimental results confirmed the outstanding SERS enhancement with an EF of 1.1×109, and the most efficient hydrogen evolution reaction (HER) activity with a sensitive photocurrent response, attributing to the multiple surface plasmonic coupling effects of the Au-Ag bimetal and efficient charge-transfer process between MoS2 and the bimetal. That is, it provides a robust method for developing multi-size bimetal-semiconductor complex nanocomposites for high-performance SERS sensors and PEC applications.

PENGARUH STRUKTUR MODAL, LIKUIDITAS DAN UKURAN PERUSAHAAN TERHADAP NILAI PERUSAHAAN DENGAN PROFITABILITAS SEBAGAI VARIABEL INTERVENING (Studi Empiris pada indeks LQ 45 yang Terdaftar di Bursa Efek Indonesia (BEI) Tahun 2014-2018)

This research is meat to analyze the effect of capital structure, liquidity and firm size on firm value with profitability as an intervening variable. The population in this study is the LQ 45 index companies listed on the Stock Exchange in 2014-2018 using annual financial report data taken by purposive sampling, so that 24 (twenty four) samples that meet the criteria are obtained. The sampling criteria chosen were 1) Companies that were consistently listed on the LQ 45 index in 2014-2018. 2) LQ 45 index companies that report financial reports for the end of December 31, complete with notes on financial statements (CALK) for the years 2014-2018. 3) Companies that use rupiah as their financial reporting currency. 4) Companies that report positive profits in their financial reporting. The analysis technique used is multiple linear regression analysis and path analysis with a significant level of 5%, the results of this study indicate that: 1) Capital structure (DER) has a significant negative effect on profitability. 2) Liquidity (CR) has a significant negative effect on profitability. 3) Firm size (SIZE) has a significant negative effect on profitability. 4) Capital structure (DER) has a significant positive effect on firm value (TOBIN'S Q). 5) Liquidity (CR) has no significant negative effect on firm value (TOBIN'S Q). 6) Firm size (SIZE) has no significant negative effect on firm value (TOBIN'S Q). 7) Profitability (ROA) has a significant positive effect on firm value (TOBIN'S Q). 8) Profitability (ROA) is able to mediate the effect of structure (CR) on firm value (TOBIN's Q). 9) Profitability (ROA) is not able to mediate the effect of liquidity (CR) on firm value (TOBIN's Q). 10) Profitability (ROA) is not able to mediate the effect of firm size (SIZE) on firm value (TOBIN's Q).

Effect of cryogenic temperature on static fracture of concrete having different structural sizes: Experimental tests

Cryogenic temperature is one of the extreme environments for the application of concrete. Compared with the vast amounts of researches on the size effect of concrete at ambient temperature, the investigation on size effect at cryogenic temperature is very limited. This work presents a series of experimental investigations on the static uniaxial-compressive/ splitting-tensile failure of concrete with different structural sizes (100, 150, and 300 mm) at four target temperature levels (+20 °C, −30 °C, −60 °C, and − 90 °C). The experimental results indicate that when the temperature decreases, the concrete specimens present more brittle failure patterns and the number of damaged aggregate particles on the failure surface increases. Additionally, both the measured uniaxial-compressive and splitting-tensile strengths increase linearly, and structural size exhibits a significant influence on the nominal strengths. The obvious size effect can be observed on compressive and splitting-tensile strengths at cryogenic temperature. Compared to uniaxial-compressive strength, cryogenic temperature performs more significant effect on the splitting-tensile strength and its corresponding size effect. Finally, based on the statistical size effect law, a modified prediction formula considering quantitative coupling effect of temperature and structural size was proposed, which can predict the nominal strength of concrete with different structural size at different cryogenic temperatures.

Masonry vaulted structures under spreading supports: Analyses of fracturing behavior and size effect

This paper deals with the fracturing behavior of unreinforced masonry arches and vaults induced by spreading supports. The traditional method of limit analysis is limited in understanding the actual failure of arches, as it assumes the simultaneous formation of hinges once the thrust line reaches the edge of the masonry structure. The damage propagation phenomenon, starting from the trigger of the fracture up to the complete structural failure is thus ignored. Moreover, limit analysis does not capture the effect of structural size on the nominal strength due to strain-softening and damage localization. This manuscript proposes a thorough understanding of the fracturing behavior and size-effect of arches and vaults based on computational modeling and non-linear fracture mechanics concepts. For this purpose, the Lattice Discrete Particle Model (LDPM) is adopted to simulate a variety of stone masonry vaulted structures up to their collapse. The formation of hinges, the activation of the mechanism and the kinematic mechanism are analyzed for three different types of vaults, namely groin, barrel and depressed vaults, and for six different slendernesses. The effect of arch size on structural strength is then analyzed using LDPM, by simulating self-similar arches of five different sizes and of three different slenderness ratios. The numerical data of size-effect is also analyzed using a newly developed analytical formula based on non-linear fracture mechanics theory and taking into account self-weight, whose effect is of paramount importance in arches and vaults under spreading supports. Results show a strong reduction of structural strength as the size increases, as a matter of fact stronger than the typically observed reduction due to energetical size-effect. The difference is due to self-weight, one of the main driving forces in the collapse of thrusting arches. This might explain the reason why in some seismic locations, small sized vaulted structures remain almost undamaged whereas larger ones often collapse.

Profitabilitas sebagai Pemoderasi Pengaruh Struktur Aktiva, Risiko Bisnis, dan Ukuran Perusahaan pada Struktur Modal

The capital structure is very important for the company, this is because it involves the policy of determining the source of funding used, both from inside and outside the company. This study aims to determine the effect of asset structure, business risk, and firm size on capital structure with profitability as a moderating variable. The research was conducted on manufacturing sector entities that are listed on the Indonesia Stock Exchange (IDX) for the 2016-2019 period. The population is 141 entities. Based on the purposive sampling method, the research sample used was 70 manufacturing entities. The data analysis technique in this study is moderated regression analysis. The results showed that the asset structure has a negative effect on the capital structure. Business risk has no influence on the capital structure. Firm size has a positive influence on capital structure. Profitability is able to moderate the effect of asset structure and firm size on capital structure. Profitability does not moderate the effect of business risk on capital structure.
 Keywords: Capital Structure; Assets Structure; Business Risk; Firm Size; Profitability.

Polyvinylpyrrolidone as a Corrosion Inhibitor for Carbon Steel in a Perchloric Acid Solution: Effect of Structural Size

Polymers are materials composed of macromolecules characterized by duplicates of smaller molecules that are covalently bonded together to provide a set of properties. Corrosion inhibition by such compounds is usually attributed to their adsorption on the metal-solution interface. The inhibition effect of different sizes of polyvinylpyrrolidone (PVP) on the corrosion of carbon steel (C-steel) in solutions of perchloric acid was investigated. The inhibition efficiency increases as the size of the inhibitor and its concentration increases, but decreases as the temperature increases and can reach a value of 81.53% and 5.0x10^-3 mol L^-1(PVP: 58,000 g mol^-1) at 30°C. The most remarkable inhibition efficiency was confirmed by the presence of the film formed on the metal surface by scanning electron microscopy. The kinetic and thermodynamic parameters for the corrosion of C-steel and adsorption of the inhibitor were determined and discussed. The combination of PVP with potassium iodide produced a strong synergistic effect on the inhibition of C-steel corrosion leading to a significant improvement in the inhibition efficiency. Quantum chemical parameters were studied using density functional theory to determine the possible relationship between the inhibitor and its electronic properties.

Cheap, fast and durable degradation of azo dye wastewater by zero-valent iron structural composites

Insufficient chemical activity of zero-valent iron (ZVI) is the main problem that limits its performance in degrading dyeing wastewater. Currently, the methods of creating acidic reaction condition and reducing the particle size of ZVI are widely used to improve the degradation activity of ZVI. However, they have disadvantages such as high reactor requirements and oxides accumulation. Herein, peculiar porous structural composites constructed with porous ferroalloy supported iron powders were prepared depending on magnetic force, the effects of pH, material structure, and powder size on the degradation performance of iron in Orange II solutions were detailedly investigated. The porous structure endowed the composite materials with greatly enhanced degradation performance, especially in near-neutral and alkaline environments, enable a cheap, fast, and durable degradation. The results show that the compositing porous ferroalloy with iron powder can largely increase the kinetic rate constant by more than 15 times, which is much more advantageous than increasing the specific surface area of the powder or increasing the acidity. This work reveals the determinants that affect the degradation performance of ZVI, and presents an effective method for tuning the properties of magnetic materials using porous structural composites.

Stemflow variability across tree stem and canopy traits in the Brazilian Cerrado

The Cerrado savanna of Brazil is considered the most biodiverse savanna in the world and its vegetation acts as an interface between rainfall and recharge processes for the largest aquifer system (Guarani) in South America. Understanding how major Cerrado tree species affect the amount and patterns of rainfall at the surface, therefore merits scientific attention. Some rainfall that contacts the Cerrado canopy will be drained to a concentrated area around the stem base as ‘stemflow.’ Hypothetically, this spatially concentrated hydrologic flux may contribute nontrivially to recharge. Here, we examine stemflow variability over 13 months for 151 trees, representing 36 species common to the region, with a large range in stem and canopy structures. Bark texture, stem diameter at breast height (D) and the canopy height-to-width ratio (H:W) were measured for all trees, then individuals were sorted into three classes: smooth, scaled and furrowed bark texture; < 10, 10–20 and > 20 cm D; and < 1, 1,2 and > 2 canopy H:W. These data were used to investigate how tree morphological traits influence stemflow in the Cerrado. Stemflow over the study period represented 2.5% of rainfall, and the contribution of each morphological class to the region's scaled total stemflow yield was calculated. Although median stemflow volumes per storm were significantly different between bark textures (smooth > scaled > furrowed); the interrelated effects of canopy structure (H:W) and tree size (DBH) resulted in a relatively well-balanced representation of all bark classes to the Cerrado's total stemflow yield (41% from smooth-barked trees, 30% scaled-bark trees, and 29% furrowed-bark trees), regardless of the density of individuals belonging to each class analyzed. Large trees (D>20) with low canopy H:W<1 and scaled bark produced the lowest median stemflow fractions. The highest contribution to stand-scale stemflow yield in this Cerrado study was linked to the combination of stem and canopy traits in three ways: (1) trees with smooth bark dominated by D<10 and H:W1-2; (2) trees with D10–20 dominated by smooth bark and H:W1-2 ratio, and (3) trees with H:W1-2, dominated by smooth/furrowed bark trees and D<10. These findings highlight the importance of trait-based approaches in studying how tree stem (bark), size (DBH), and canopy (H:W) structural traits interact to affect stemflow generation, while filling a knowledge gap regarding the ecohydrology of the Brazilian Cerrado.

Effect of Asset Structure and Firm Size on Capital Structure (Case Study on Food and Beverage Companies on the Indonesian Stock Exchange)

The calculation results obtained by using multiple linear regression model analysis shows that the asset structure and company size simultaneously or simultaneously have a positive and significant effect on the capital structure. This is supported by the F-count value of 24,957 at a significance level of 0.000 which is smaller than 0.05, which means that the F-count value is greater than the F-table value, which is 24.957 &gt; 3.134. Asset structure partially has a negative and significant effect on capital structure. This is supported by the t-count value of -4.813 at a significance level of 0.000 which is smaller than 0.05 which means that the t-count value is smaller than the t-table value, namely -4.813 &lt;1.994. Firm size partially positive and significant effect on capital structure. This is supported by the t-count value of 4.922 at a significance level of 0.000 which is smaller than 0.05, which means that the t-count value is greater than the t-table value, namely 4.922 &gt; 1.994.

The Effect of Profitability (ROE), Capital Structure (DER) and Firm Size on Firm Value (PBV) (Case Study on Primary Consumer Goods Manufacturing Companies Listed on the Indonesia Stock Exchange 2016-2018 Period)

The purpose of this study is to find out an overview of profitability (ROE), capital structure (DER), firm size and firm value (PBV) in Primary Consumer Goods sector companies listed on the Indonesia Stock Exchange for the 2016-2018 period. And to find out an overview of the effect of profitability (ROE), capital structure (DER) and firm size on firm value (PBV) in Primary Consumer Goods sector companies listed on the Indonesia Stock Exchange partially and simultaneously for the 2016-2018 period. The research method used in this study is a quantitative method. The population in this study are Primary Consumer Goods sector companies listed on the Indonesia Stock Exchange during the 2016-2018 period with a total of 60 companies, and the research sample is 41 companies with the criteria or considerations used in research such as companies that have positive net income for the period 2016-2018. The result of this research is that profitability (ROE) tends to decrease, the capital structure (DER) fluctuates, the size of the company shows an increase, while the company value (PBV) fluctuates every year. Profitability (ROE) has an effect on firm value (PBV), capital structure (DER) has an effect on firm value (PBV) and firm size has an effect on firm value (PBV) in Primary Consumer Goods sector companies listed on the Indonesia Stock Exchange for the period 2016-2018. Profitability (ROE), capital structure (DER) and company size simultaneously have an effect on firm value (PBV) in Primary Consumer Goods sector companies listed on the Indonesia Stock Exchange for the 2016-2018 period.

Pengaruh Struktur Aktiva dan Ukuran Perusahaan Terhadap Harga Saham Pada Perusahaan Sub Sektor Farmasi di Bursa Efek Indonesia

The capital market is one of the alternative sources of long-term funding among various other alternatives for companies that need funds for the sustainability of the company. The capital market has an important role for the economy of a country because the capital market performs a function, namely as a means for business funding or as a means for companies to obtain funds from the investor community.&#x0D; &#x0D; For this reason, it is necessary to expand research that is supported by a basic theory, so the problem of factors capable of predicting changes in stock prices is proposed, where there are two variables that are thought to have an effect on changes in stock prices in this study. The two variables are asset structure and firm size. In addition, based on various previous research results, it was found that there were gaps or inconsistencies in the research results (gap research) conducted by researchers. On this basis, the title adopted from this research is "The Effect of Asset Structure and Company Size on Share Prices in Pharmaceutical Sub-Sector Companies on the Indonesia Stock Exchange".

Pengaruh Struktur Modal dan Ukuran Perusahaan Terhadap Nilai Perusahaan Pada Perusahaan Sub Sektor Perdagangan Besar Barang Produksi Yang Terdaftar di Bursa Efek Indonesia Pada Tahun 2016 - 2018

This study aims to examine the effect of capital structure and company size on firm value in the large trade sub sector of manufactured goods listed on the Indonesia Stock Exchange in 2016 - 2018, either simultaneously or partially. The population used in this study is the sub-sector companies of large-scale production goods listed on the Indonesia Stock Exchange which submit their financial reports of 26 companies. The design of this research is causal quantitative as proof of the effect of capital structure and firm size as independent variables on firm value as the dependent variable. The data collected by documents recording, and analyzed by multiple linear regression analysis. The results showed that: (1) capital structure and firm size had a significant effect on firm value, (2) capital structure had a positive and significant effect on firm value, (3) firm size had a negative and significant effect on firm value.

The Effect of Assets Structure and Company Size on Capital Structure in Food and Beverage Companies Listed on The Indonesia Stock Exchange for The 2014-2018 Period

This study aims to determine how the influence of asset structure and company size on food and beverage companies listed on the Indonesia Stock Exchange for the period 2014-2018. The population in this study are food and beverage companies listed on the Indonesia Stock Exchange for the 2014-2018 period, totaling 14 companies. Samples were taken as many as 7 companies with a sampling technique using purposive sampling, namely where the sample was selected by adjusting to certain criteria or goals. Regression analysis method used is multiple linear regression and to test the hypothesis used t test and f test at a significant level or alpha = 5%. The research data were analyzed or processed using the SPSS version 23 program. Based on the research results, it was 0.279 or 27.9%. This shows that if the asset structure and firm size can explain the capital structure of 27.9%, the remaining 72.1% (100% - 27.9%) is explained by other variables outside this research model. In the multiple linear regression test results obtained the following regression equation: Y = 0.829 + 1.854X1 0.043X2 + e. The results of the hypothesis test state that: H1 is accepted, it can be seen from the tcount value is 3.897 > ttable 2.03452 and with a significance value of 0.000 ttable -2.03452 and with a significance value of 0.498 > 0.05, firm size has no effect on capital structure. H3 is accepted, it can be seen from the Fcount value is 7.593 > Ftable 3.29 with a significance value of 0.002 <0.05, so the asset structure and firm size have a simultaneous effect on the capital structure.

A New Rotor-Type Dynamic Classifier: Structural Optimization and Industrial Applications

Due to the inadequate pre-dispersion and high dust concentration in the grading zone of the turbo air classifier, a new rotor-type dynamic classifier with air and material entering from the bottom was designed. The effect of the rotor cage structure and diversion cone size on the flow field and classification performance of the laboratory-scale classifier was comparatively analyzed by numerical simulation using ANSYS-Fluent. The grinding process performance with an industrial classifier was also tested on-site. The results revealed that an inverted cone-type rotor cage is more suitable for the under-feed classifier. When the rotor cage’s top-surface diameter to bottom-surface diameter ratio was too large or too small, the radial velocity and tangential velocity at the outer surface of the rotor cage greatly fluctuated. Furthermore, the diameter of the diversion cone also affected the axial velocity and radial velocity of the flow field. Models T-C(1-0.8) and T-D(1-0.7) were determined as the best rotor cage structures. Under stable operating conditions, the classification efficiency of the industrial classifier was 87% and the sharpness of separation was 0.58, which meet the industrial requirements for classification efficiency and energy consumption. This present study provides theoretical guidance and engineering application value for air classifiers.

Pengaruh Struktur Modal, Profitabilitas, Likuiditas, dan Ukuran Perusahaan terhadap Nilai Perusahaan (Studi Empiris pada Perusahaan Infrastruktur, Utilitas, dan Transportasi yang Terdaftar di Bursa Efek Indonesia Periode 2015-2018)

The purpose of this study was to determine the effect of capital structure, profitability, liquidity, and firm size on firm value of the company on infrastructure, utilities and transportation companies listed on the Indonesia Stock Exchange for the period 2015- 2018. The sampling technique used was purposive sampling, the sample of companies obtained consisted of 24 infrastructure, utilities and transportation companies listed on the Stock Exchange in 2015-2018. The research method uses multiple linear regression with a panel data approach. The results show that capital structure and profitability have a significant positive effect on the firm value of infrastructure, utilities and transportation companies listed on the Indonesia Stock Exchange for the period 2015-2018. Liquidity and firm size have a significant negative effect on the firm value of infrastructure, utilities and transportation companies listed on the Indonesia Stock Exchange for the period 2015-2018. The implications of this study include that additional debt in the company's capital structure can be a positive signal to investors that can increase company value because additional debt in a company can be used for additional investment funds and corporate tax savings. Then, an increase in the value of profitability can show investors good prospects for the company because many investors are attracted to companies that have good profitability, and have an effect on increasing share demand and company value.