Net Rate Of Return Research Articles

Construction of a predictive model for osteoporosis risk in men: using the IOF 1-min osteoporosis test

ObjectiveTo construct a clinical prediction nomogram model using the 1-min IOF osteoporosis risk test as an evaluation tool for male osteoporosis.MethodsThe 1-min test results and the incidence of osteoporosis were collected from 354 patients in the osteoporotic clinic of our hospital. LASSO regression model and multi-factor logistic regression were used to analyze the risk factors of osteoporosis in patients, and the risk prediction model of osteoporosis was established. Verify with an additional 140 objects.ResultsWe used logistic regression to construct a nomogram model. According to the model, the AUC value of the training set was 0.760 (0.704–0.817). The validation set has an AUC value of 0.806 (0.733–0.879). The test set AUC value is 0.714 (0.609–0.818). The calibration curve shows that its advantage is that the deviation correction curve of the nomogram model can maintain a good consistency with the ideal curve. In terms of clinical applicability, compared with the "total intervention" and "no intervention" schemes, the clinical net return rate of the nomogram model showed certain advantages.ConclusionUsing the 1-min osteoporosis risk test provided by IOF, we built a male osteoporosis risk prediction model with good prediction effect, which can provide greater reference and help for clinicians.

Production of high-purity carbon dioxide and sodium bicarbonate by lime cellar gas cleaning and chemical recycling: Process simulation and techno-economic analysis

The cement industry is responsible for 8% of total global CO2 emissions, which mainly originate from limestone calcination and fuel combustion. In view of the application potential of using CO2 to produce chemicals, this paper developed a novel process based on the Aspen Plus process simulation for the co-production of 99.99% CO2 by means of Methyldiethanolamine (MDEA) absorption/desorption and NaHCO3 by carbonization of CO2, NH3 and Na2SO4. The effects of absorption temperature, NH3 and Na2SO4 feeding amount, crystallizer temperature and pressure on CO2 capture rate and utilization rate were explored. The results showed that the best CO2 capture rate was achieved when the cellar gas inlet temperature of the absorber tower was 37 °C; Saturated Na2SO4 solution was favorable for CO2 absorption, and the CO2 utilization rate increased with the increase of Na2SO4 dosage; NaHCO3 yield decreased with the increase of crystallizing temperature, and the best NaHCO3 yield was achieved when the crystallizer temperature was 35.5 °C; Crystallizing pressure had little impact on the reaction. Economic analysis showed that the project will start to be profitable in 6.48 years with a Net Return Rate (NRR) value of 13.51%. It indicates that the project has economic benefits and provides a new way to reduce CO2 emissions from lime cellar gas.

Innovative biorefineries for cleaner waste textile management towards circular economy: Techno-economic analysis

The primary practices for waste textile management are landfill and incineration, generating serious environmental problems while they have a high potential for sustainable production of different green products. This study dealt with the economic analysis of bioethanol production and polyester recovery from waste textile through different scenarios. The pretreatment plays a key role in the biofuel production from waste textile and the most promising methods are pretreatment with NaOH, NaOH/urea, NaOH/thiourea, NaOH/urea/thiourea, and N-Methylmorpholine N-oxide, evaluated through scenarios 1 to 5, respectively. After pretreatment, the cotton part is enzymatically hydrolyzed and fermented through simultaneous saccharification and fermentation. Detailed simulations of the processes were carried out by Aspen Plus, and economic studies were conducted by Aspen Process Economic Analyzer for each scenario. The bioethanol production price were 0.447, 0.524, 0.624, 0.618, and 1.244 $/L for scenarios 1 to 5. The total capital investments required for scenarios 1 to 5 were 38.54, 38.60, 38.42, 38.57, and 39.35 M$, respectively. The profitability index for scenarios 1 to 5 were 2.17, 1.92, 1.61, 1.34, and 1.51. Therefore, the biorefinery based on producing bioethanol from waste textile is economically feasible. Moreover, In scenario 1, the payout period was the minimum time of 3.56 year, and the net return rate was 117.16. Sensitivity analysis also reveals that the price of waste textile has a significant impact on the profitability of the designed biorefinery. Scenario 5 is the most sensitive to variations in waste textile price; a 100% increase in the cost of waste textile increases the cost of producing bioethanol to more than 1.45 $/L, respectively.

Techno-economic and life-cycle analyses of sustainable aviation fuel production via integrated catalytic deoxygenation and hydrothermal gasification

Several technologies have been developed to produce sustainable aviation fuel (SAF), the hydroprocessing of esters and fatty acids (HEFA) representing one of the most mature pathways. Although HEFA has been widely adopted by industry, this pathway is mainly reliant on the hydrodeoxygenation (HDO) reaction, which requires large amounts and high pressures of hydrogen gas that reduces the cost-effectiveness of the process. In this study, the economic, environmental, and exergy analyses of two alternative scenarios for the catalytic production of SAF were considered. In both scenarios, SAF is produced through the catalytic deoxygenation of tall oil fatty acid (TOFA) via decarboxylation/decarbonylation (deCOx) – an approach requiring smaller amounts and lower pressures of hydrogen, feedstocks of lower purity and cost, and simpler supported metal catalysts relative to HDO. The material and energy balance was calculated using Aspen Plus process simulation software. Scenario 1 comprises a plant in which the catalytic deoxygenation of TOFA via deCOx is performed using hydrogen gas obtained commercially, while scenario 2 integrates catalytic deoxygenation with a plant that produces hydrogen gas via hydrothermal gasification. The study revealed that both scenarios were economically feasible relative to other pathways for SAF production, with the minimum fuel selling price (MFSP) of scenario 2 (USD$ 0.39/L) being lower than that of scenario 1 (USD$ 0.62/L). In addition to being the most economically viable, scenario 2 was also found to be preferable from an environmental standpoint since it also shows a lower global warming potential (GWP). Discounted cash flow analysis (DCFA) was used to determine other economic indicators such as net present value (NPV), internal rate of return (IRR), net rate of return (NRR) and payback period (PBP), which was estimated to be approximately 3 years for both scenarios. Finally, sensitivity analysis confirms that the raw materials and equipment purchase costs have the greatest impact on the MFSP.

ANALYSIS OF FINANCIAL PERFORMANCE AT THE KP-RI KOPEKA SAVING AND LOAN COOPERATION (KSP) KOPEKA INDRAGIRI HULU REGENCY

In essence, the financial performance of a cooperative can be measured and viewed through financial statements by analyzing financial statements. The financial report is a financial list that is directly related to the financial position and financial operations, both of which provide information regarding the financial condition of the cooperative. In the measurement of financial position, the elements that are directly related are assets, liabilities and equity. One of the analytical techniques is ratio analysis which can provide clues that describe the condition of KSP KP-RI Koppeda, Indragiri Hulu Regency, especially in the financial sector.This study aims to test and analyze financial performance using financial ratio analysis methods: (1) Liquidity Ratio which is calculated based on Current Ratio and Quick Ratio, (2) Solvency ratio calculated based on Debt to Equity Ratio and Debt to Total Assets Ratio, (3) Profitability Ratio calculated based on the Net Rate of Return On Investment and Return On Equity. The object used in this study is financial performance in the form of a Balance Sheet and Profit and Loss Statement of KSP KP-RI Kopeka, Indragiri Hulu Regency for the period 2016 to 2020. The data used is secondary data. The data analysis method used was quantitative descriptive analysis technique, which is an analysis that describes by calculating the ratios in the financial statements using certain formulas.The results showed that the financial performance of the Savings and Loans Cooperative (KSP) KP-RI Kopeka, Indragiri Hulu Regency was in poor condition, both from the ratio of liquidity, solvency and profitability. This situation is illustrated by the condition of current assets that have not been able to meet current liabilities. And their own capital and total assets have not been able to meet the total debt. And Cooperatives have not been able to generate the remaining operating results from their own capital and total assets used.

Ethylene from renewable ethanol: Process optimization and economic feasibility assessment

At present, ethylene is the most widely produced organic compound in the chemical industry. The main commercial way to obtain ethylene is by steam cracking of a wide range of hydrocarbon feedstocks, but biomass-derived ethanol can be catalytically dehydrated as a sustainable alternative route in order to exploit new renewable sources. The aim of this work is to design an optimal bioethanol-to-bioethylene plant, with a capacity of 445,652 ton/year, and to assess its economic feasibility. This design features an improved production capacity and intensified energy management.The main novelty of this study is the use of diluted bioethanol solutions, bypassing the energy intensive and expensive dehydration step. Moreover, while the first industrial bioethanol-to-bioethylene process uses NaOH to purify the outcoming flow from CO2, this plant uses diluted Methyldiethanolamine (MDEA), regenerated in situ. With this plant, the double of the capacity of the Braskem’s plant, now the largest one, can be reached in an environmentally more sustainable manner.A pinch analysis was performed, in order to minimize the energy consumption of the process by optimizing the heat recovery systems. The economic analysis of the process consists of the evaluation of the total cost of the plant (TOC) including the sum of the CAPital EXpenditures (CAPEX) and the OPerating ones (OPEX), together with some sensitive profitability indexes (net yearly profit, net present value, net rate of return and cash flow analysis). The designed process presents an economically competitive solution compared to the current bioethylene production units.Assuming a premium price of between 0.293 $/kg for diluted bioethanol, the proposed plant is competitive with the lowest production cost for bioethylene (Brazil and India), while a sensitivity analysis on diluted bioethanol price evidenced that this option remains competitive still in Europe with a bioethanol cost 0.65 $/kg.

Techno-economic evaluation and sensitivity analysis of a conceptual design for supercritical water gasification of soybean straw to produce hydrogen

This paper proposes a conceptual design for the catalytic supercritical water gasification of soybean straw. The design consists of four process units for pretreatment, gasification, separation, purification and combustion. The economic feasibility of hydrogen production was evaluated based on a comprehensive cash flow analysis. The economic analysis suggested a minimum selling price of U.S. $1.94/kg for hydrogen. The cost of hydrogen produced is relatively lower compared to that of other biomass conversion processes. Besides, the net rate of return (NRR) estimated was 37.1%. A positive NRR value indicates that the project is profitable from an economic perspective. Sensitivity analysis indicates that the minimum selling price of hydrogen is affected by the feedstock price, utility cost, tax rate and labor cost. Moreover, feedstock price and labor cost show the greatest effect. Other factors such as land cost, working capital and utility cost showed the least effect on the minimum selling price.

Population Structure Analysis of Javan Rhinoceros at Ujung Kulon National Park, West Java

<p>Javan rhino (Rhinoceros sondaicus) is one of the rare animals with critically endangered status. The Ujung Kulon National Park (UKNP) is one of javan rhino habitat in Indonesia. Every year the monitoring program for javan rhino in UKNP was performed to identify the animals. This research was aimed to analyze the population structure of javan rhino based on the records data from 2011 to 2019 in UKNP. Research showed that the natural increase (NI) and birth rate (BR) values were 17.34% (moderate) and 67.33% (high) respectively. The net return rate (NRR) value was 15.38% (male) and 14.28% (female). The NRR value in the present study was lower than 100% and caused by less number of animals in a population for 30 years of breeding length. Despite this, the inbreeding rate of javan rhino at UKNP in 2019 was 0.01 (low). It was concluded that the natural increase of javan rhino at UKNP showed a good parameter but the population number needs to be increased.</p>

Delegation of investment decisions, and optimal remuneration of agents

We analyze an investor who delegates information acquisition and investment decisions to an agent. The investor cannot monitor the agent’s effort or information. Optimal pay schemes contain bonuses that increase with the net return rate of the investment, but, unlike conventional contracts, at a decreasing rate. Moreover, investments with low return rates are penalized, again unlike conventional contracts. Nevertheless, it may be optimal for the investor to reward the agent above the agent’s reservation utility. We examine the role of the agent’s risk attitude for the shape of the pay scheme, and whether firing after bad investments is a more effective threat than reduced pay. We also analyze how the nature of the contract changes if the agent is given bargaining power.

Urban land speculation: model development

PurposeThe aim of the research is to examine the role of property tax in land and building administration and to develop a dynamic model. The paper investigates the extent to which local governments take advantage of property tax in generating revenue and encouraging certain life cycle assessment-oriented land and building speculation patterns in Shashemene, Ethiopia.Design/methodology/approachThe study was conducted using case study and survey research strategies. Shashemene's administrative area (i.e. specific to four peri-urban villages) was purposively selected as the case study area. A combination of different data collection instruments was employed: questionnaires and field observation. Moreover, an extensive survey of owners of undeveloped land and building, throughout the study area, was conducted. Multiple regression analysis was applied to the analyzed data as well as the use of dynamic modeling of land and building via qualitative and numerical analysis of property.FindingsResults indicate that speculators will hold land and building for a marginal period only if the difference between present net rates of return exceeds the difference between discounted expected percent return.Practical implicationsThis paper provides a simple model to recognize the optimum length of time to hold a parcel of land and building from the market by land speculators.Originality/valueThe introduction and potential implementation of dynamics modeling to the local government calls for controlling speculation that has resulted in local revenue enhancement.

Property Taxes and Dynamic Inefficiency: A Correction of a 'Correction'

According to Homburg’s (2014) comment on Kim and Lee (1997), an ad-valorem property tax on land cannot cause dynamic ineffciency of equilibrium allocations in an overlapping-generations model unless the tax is confiscatory, i.e., equal to or greater than land rents. With such a tax, Homburg claims, land would be intrinsically worthless and the market for land would be closed. The latter claims are invalid because, as a store of value, land can be traded at a positive price even if the net rate of return on land is negative.

Credit Risk Assessment Using Regression Model on P2P Lending

ABSTRACT The financial market crashed after Lehman Shock in 2008 which creates the risk averting environment for banks. Under this kind of environment, it has become difficult for new and small businesses to have access to loans. Since then, P2P (Peer to Peer) lending becomes more and more popular around the world. However, most of the researches who had studied about credit risk on P2P lending consider only the event that the borrower will default instead of the amount of loss. In this work, we consider Net Return Rate (NRR) as the criterion to label the data for prediction training. We train the regression model to assess credit risk. The proposed model predicts the amount of profit from a borrower. In our results, by using our proposed credit risk assessment model, an investor of P2P lending can measure the risk with better accuracy and the proposed model can also predict the amount of profit from a loan.

The Role of the Property Tax in Urban Land Speculation

This article reports the results of an extensive survey of owners of undeveloped land in and outside the Shashemene City. After identifying several distinct owner types, the authors demonstrate that changes in ownership, as well as in the character and use of land, begin more than twenty years before the rural countryside is actually converted to urban use. These findings have important implications for the design and implementation of policies attempting to control or direct urban growth. In particular, a simple dynamic model that explains the optimum length of time to hold a parcel of land from a market was developed and its properties were analyzed both qualitatively and numerically. One finding is that the speculator will hold the land for the marginal period only if the difference between present net rates of return exceeds the difference between discounted expected per cent returns. On the other hand, if land speculators held land for one year, property tax increased by 0.000079 birr per year, which is inappropriate methods to control land speculation . Keywords : Land speculation; Model; Property tax; Speculators; Sprawling. DOI : 10.7176/JEES/9-1-05

Current state of the Health Advisory Council of Munich: A Survey

After over 27 years of existence, the executive board of the Health Advisory Council of the state capital Munich (HAC) decided to conduct an inventory. The objective was to gather data on the perceptions of HAC participants regarding the structure of committees, issues addressed, their processing as well as the results of the projects, in addition to events organized, public relations activities and target achievement. The survey should be the basis for decisions regarding future directions or further developments of the HAC. Between January 24 and March 28, 2017, a cross-sectional survey of HAC participants was carried out with participation on a voluntary basis, using a self-designed semi-standardized questionnaire. The answers were analysed descriptively. The survey involved 284 active participants. The net return rate was 46.5% (132 participants). The majority of respondents felt that the committee structure was appropriate. 85.6% of the respondents agreed that the communication and cooperation within the committee was positive. There was perceived potential for improvement in cooperation with the city council. The content alignment of the HAC was considered to be appropriate by 87.8%; however, sustainability was seen as an area with potential for improvement. Professional exchange of information was regarded by more than three-fifths of the participants as the most important objective of committee work. Organisation of events was seen as positive by 74.2%; 57.6% were of the opinion that the reporting of the results was transparent, but with potential for improvement in the area of public relations. About two-thirds of the respondents felt that HAC was successful in achieving its objectives. The HAC represents a successful institution in the health care system of Munich. Needs for improvement were identified in the following areas: networking with the city council, sustainability of results and in the implementation of a more intensified public relations effort.

Frações ótimas da adubação com fósforo no pré-plantio e na fertirrigação por gotejamento de tomateiro

Resumo:O objetivo deste trabalho foi estabelecer frações ótimas da dosagem total de fósforo, a serem aplicadas no pré-plantio e na fertirrigação do tomateiro de crescimento determinado, bem como determinar o efeito das diferentes formas de aplicação do nutriente sobre sua distribuição espacial no solo. Os tratamentos consistiram de cinco esquemas de aplicação do fertilizante: 100, 75, 50, 25 e 0% da dose total de P, dividida entre o pré-plantio (superfosfato triplo incorporado ao solo) e a fertirrigação (ácido fosfórico). O experimento foi realizado em Latossolo Vermelho argiloso com duas classes de disponibilidade de P - 7,5 e 32,9 mg dm-3 (Mehlich-1). Os tratamentos não apresentaram efeito sobre as variáveis de produção do tomateiro cultivado no solo com alta disponibilidade de P. Entretanto, no solo com menor disponibilidade do nutriente, a fertirrigação com P apresentou efeito quadrático sobre a produtividade de frutos, a receita líquida e a taxa líquida de retorno. Os melhores resultados foram obtidos com a aplicação de metade da dose total de P pela fertirrigação. A fertirrigação possibilitou movimento vertical do nutriente no solo para até 30 cm de profundidade, e movimento horizontal de até 15 cm.

Farmland Prices: Is This Time Different?

The historical behavior of farmland prices, rental rates, and rates of return are examined by treating farmland as an asset with an infinitely long life. It is found that high (low) farmland prices relative to rents have historically preceded extended periods of low (high) net rates of return, rather than greater (smaller) growth in rents. Our analysis shows that this attribute is shared with stocks and housing, and the financial literature provides ample evidence that other assets feature it as well. The long‐run relationship linking farmland prices, rents, and rates of return is analyzed. Based on this relationship, we conclude that recent trends are unlikely to be sustainable. The study explores the expected paths that farmland prices and rates of return might follow if they were to eventually conform to the average values observed in the historical sample, and concludes with a discussion of the policy implications. Recommendations for policy makers include close monitoring of farmland lending practices and institutions to allow early identification of potential problems, and identifying in advance appropriate interventions in case recent farmland market trends were to suddenly change.

Fiscal and Monetary Policies in a Transactions-Based Endogenous Growth Model with Imperfect Competition

This paper's model is capable of explaining the empirical evidence on the mixed growth-rate effects of fiscal and monetary policies and a nonlinear inflation–growth relation. When monopoly power in the product market is strong/weak, an increase in the money growth rate or the income tax rate promotes/reduces the output growth rate through lowering/raising the equilibrium gross markup and increasing/reducing the net rate of return on capital. The fact that money can generate a positive growth rate effect allows for the appearance of a nonlinear inflation–growth relation. Such a nonlinear relation cannot be caused by changes in the income tax rate.

Interjurisdictional Spillovers, Decentralized Policymaking, and the Elasticity of Capital Supply

This paper points to the important role that the elasticity of aggregate capital supply with respect to the net rate of return to capital plays for the efficiency of policymaking in a decentralized economy with mobile capital and spillovers among jurisdictions. In accordance with previous studies, we show that under the assumption of a fixed capital supply (zero capital supply elasticity) the decentralized policy choice is optimal. If the capital supply elasticity is strictly positive, however, capital tax rates are inefficiently low in the decentralized equilibrium. (JEL E22, E61, H25, H77)

Interjurisdictional Spillovers, Decentralized Policymaking and the Elasticity of Capital Supply

This paper points to the important role which the elasticity of aggregate capital supply with respect to the net rate of return to capital plays for the efficiency of policymaking in a decentralized economy with mobile capital and spillovers among jurisdictions. In accordance with previous studies, we show that under the assumption of a fixed capital supply (zero capital supply elasticity) the decentralized policy choice is optimal. If the capital supply elasticity is strictly positive, however, capital tax rates are inefficiently low in the decentralized equilibrium.

Growth impact and determinants of foreign direct investment into South Africa, 1956–2003

The paper is concerned with the growth impact and the determinants of foreign direct investment in South Africa. Estimation is in terms of a standard spillover model of investment, and in terms of a new model of locational choice in FDI between domestic and foreign alternatives. We find complementarity of foreign and domestic capital in the long run, implying a positive technological spillover from foreign to domestic capital. While there is a crowd-out of domestic investment from foreign direct investment, this impact is restricted to the short run. Further we find that foreign direct investment in South Africa has tended to be capital intensive, suggesting that foreign direct investment has been horizontal rather than vertical. Determinants of foreign direct investment in South Africa lie in the net rate of return, as well as the risk profile of the foreign direct investment liabilities. Policy handles are both direct and powerful. Reducing political risk, ensuring property rights, most importantly bolstering growth in the market size, as well as wage moderation, lowering corporate tax rates, and ensuring full integration of the South African economy into the world economy all follow as policy prescriptions from our empirical findings.