The Potato Tuber Moth (Phthorimaea operculella) is a destructive pest that poses a significant threat to stored potato crops, leading to substantial economic losses worldwide. The use of chemical insecticides to control this pest has... more
Fruit leather is one type of food that can be used as an alternative to processed food made from fruits. Some of the fruits that can be processed into fruit leather are harum manis mango and pineapple. The purpose of the study is to find... more
Stocks are one of the most popular forms of investment. In investing stocks, it is necessary to know the movement of stock prices and the investment risks that may occur. The purpose of this study is to predict the level of risk, see the... more
The utilization of information technology in learning has functioned as a tool in the teaching and learning process during the Covid-19 pandemic. The need for the availability of a learning platform using LMS (Learning Management System)... more
Mathematics is the basic foundation for other sciences. Equation is a mathematical model that can describe real-life problems, one of which is estimating non-tax state revenues in the coming year. Non-State Revenue (penerimaan negara... more
Currently, marine debris (MD) is one of them the most worrying global environmental problems because high impact on ecosystems, human health, and economy. One type of MD is that plastics have a significant and growing component,... more
This study aimed to examine the causal relationship among oil prices, JCI stock prices, and exchange rates in Indonesia. Observational data were from the period 2015M01-2020M06. The research analysis model used was Toda-Yamamoto (1995)... more
This study examines how working capital and firm size affect net profit (Empirical Study of Manufacturing Companies in the Consumer Goods Industry Sector, Household Appliances Sub Sector Listed on the IDX for the 2015 -2020 period).... more
Incremental forming is a rapid prototyping process which uses a forming tool toform a sheet metal according to a predetermined trajectory. In this work, a micro incremental deformation test (Micro InDef test) derived from the principle of... more
Mathematics is the basic foundation for other sciences. Equation is a mathematical model that can describe real-life problems, one of which is estimating non-tax state revenues in the coming year. Non-State Revenue (penerimaan negara... more
This paper describes the structure of optimal policies for discounted periodic-review single-commodity total-cost inventory control problems with fixed ordering costs for finite and infinite horizons. There are known conditions in the... more
The expansion of Japanese parent companies worldwide has forced them to carry the organizational culture that the Japanese founders had held onto their overseas subsidiaries. The main purpose of study is examined organizational culture,... more
Mathematics is the basic foundation for other sciences. Equation is a mathematical model that can describe real-life problems, one of which is estimating non-tax state revenues in the coming year. Non-State Revenue (penerimaan negara... more
Technology is present and becomes a part of human life. Each era has its own technological advantages. The history of technology begins millions of years ago. The first technology discovered by mankind was to create sharp stone chips... more
A proper planning horizon is important to the effectiveness of planning results. However, there is no planning horizon study dealing with multi-item, multi-level production planning problems which are often encountered in reality. In this... more
Climate change could lead to an increase in diseases in plants and animals. Plant pathogens have caused devastating production losses, such as in tropical countries. The development of algorithms that match the accuracy of plant and... more
Insurance aims to protect a person from financial losses that may occur due to an unexpected event. On the determination of insurance premiums used mortality tables. However, on the mortality table contains only a round age. While an... more
Insurance aims to protect a person from financial losses that may occur due to an unexpected event. On the determination of insurance premiums used mortality tables. However, on the mortality table contains only a round age. While an... more
This study aims to analyze the effect of liquidity, firm age, firm size on earnings quality. The independent variables used are liquidity, company age, company size. The dependent variable is earnings quality. The population of this study... more
This study aims to analyze the effect of liquidity, firm age, firm size on earnings quality. The independent variables used are liquidity, company age, company size. The dependent variable is earnings quality. Population p enelitian... more
This study was conducted to determine whether there is an effect of using the ratio of NPM, TATO, and DPR on Sharia Stock Prices in the Jakarta Islamic Index during the 2016-2019 period with or without the control variable of industry... more
This study aims to compare (comparatively) the financial performance of property and real estate sector companies before and during the COVID-19 pandemic for the 2019-2020 period based on liquidity ratios, solvency ratios, profitability... more
This study aims to determine the effect of likuidity, solvency, activity, profitability and market with Current Ratio (CR), Debt to Equity Ratio (DER), Total Assets Turnover (TATO), Return on Equity (ROE), and Earnings per Share(EPS), as... more
This study aims to determine and analyze differences in financial performance and stock prices before and after Covid-19 in cigarette companies. Financial performance in this study is measured using three ratios namely Return on Asset... more
Medicinal properties. The celery plant also contains many apiin glycosides (flavone glycosides, isoquercetin, and umbelliferons. It also contains, mannite, inocytes, asparagine, glutamine, choline, linamarose, pro vitamin A, vitamin C,... more
This paper presents a webserver for Indonesian fishermen, to support fishing activities. This is one of the sub-systems of e-Nelayan (in English: eFisherman) architecture, which was connected to e-Nelayan Apps; it helps to provide... more
In this paper, the Sprott jerk system based quadratic function is presented. The dynamics of this system is revealed through equilibrium analysis, phase portrait, bifurcation diagram and Lyapunov exponents. The Sprott system can exhibit a... more
Attitudes and behaviors that are in accordance with the noble values of Pancasila are preserved by character education based on local wisdom. The character education program begins with providing knowledge of local wisdom values,... more
A proper planning horizon is important to the effectiveness of planning results. However, there is no planning horizon study dealing with multi-item, multi-level production planning problems which are often encountered in reality. In this... more
This paper introduces a new chaotic jerk system with three cubic nonlinear terms. The stability properties of the three equilibrium points of the proposed jerk system are analyzed in detail. We show that the three equilibrium points of... more
An optimal advertising singular control problem with unbounded control is formulated in a generalized fashion by introducing a reparametrization of time. This reparametrization is a new control. The method of dynamic programming is then... more
DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page... more
The assumptions of multiple regression analysis are not met in many practical forecasting situations and, as a result, regression models are insufficiently conservative. We tested the effect on forecast accuracy of applying three... more
The gender gap that occurs in Special Capital Region of Jakarta, between men and women has an impact on aspects of employment related to labor absorption. Increasing the number of optimal employment opportunities, both in terms of... more
This study aims to compare (comparatively) the financial performance of property and real estate sector companies before and during the COVID-19 pandemic for the 2019-2020 period based on liquidity ratios, solvency ratios, profitability... more
The need for technology that can help Indonesian fishermen is needed to improve fishing yields. Based on BPS data Indonesian fishermen dropped from 1.7 million to 64 thousand in 2013. This is due to several factors, including unfavorable... more
financial distressis a condition where the company's finances are experiencing a loss because it is considered unable to pay its obligations when they are due. The increase in cigarette excise rates will certainly have an impact on... more
Black–Scholes partial differential equation is a generally acceptable model in financial markets for option pricing. However, without variable transformations, the provision of symbolic solutions to the variable coefficient partial... more
The mortality table or often referred to as the life table is the main instrument used by actuaries in building premium and reserve structures for life insurance products, annuities, and pension programs. The mortality table provides a... more
The mortality table or often referred to as the life table is the main instrument used by actuaries in building premium and reserve structures for life insurance products, annuities, and pension programs. The mortality table provides a... more
2. THEORETICAL BACKGROUND 2.1. Entreprise Value In making financial decisions, financial managers need to determine goals to be achieved. The right financial decisions can maximize the value of the company so as to increase the prosperity... more
Conflict of Interest Statement: The author [s] declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Investors always have high hopes for stock returns, but that is sometimes beyond expectations so investors must be careful in buying shares. The purpose of this study is to provide information to investors about what factors influence... more
The influence of social media in disseminating information, especially during the COVID-19 pandemic, can be observed with time interval, so that the probability of number of tweets discussed by netizens on social media can be observed.... more
This study analyzes the performance of the Kompas 100 stock before and after the COVID-19 pandemic in Indonesia in the period 2019 – 2020. This study uses stock price data for 40 companies listed in the Kompas 100 stock group on the... more
This research aims to determine the difference in financial performance of consumer goods and real estate companies prior to and during COVID-19 outbreaks. The research period starts from December 2019 (prior to the COVID-19 outbreaks)... more
The study focusing to examine how the Debt to Equity Ratio, Current Ratio, Company Size influence the Return on Assets ratio with Net Profit Margin as a moderating variable. This study has pharmaceutical companies listed on the Indonesia... more
In the present article, a time fractional diffusion problem is formulated with special boundary conditions, specifically the nonlocal boundary conditions. This new problem is then solved by utilizing the Laplace transform method coupled... more