The mathematical model of COVID-19 considered in this study is the SEIR model which is defined by four ordinary differential equations that describe the number of susceptible, infected, infected and cured individuals by applying optimal control theory in the form of treatment and quarantine. To characterize...

Final Project is one of the academic stages that must be passed by students to obtain a degree. In the era of the Covid-19 pandemic, the stages to achieving this degree must be done online by students. To accommodate this, we need a system that can bridge so that the final project stages can run even...

Jasminum Sambac L. plant, especially the flower used for ritual ceremony, i.e.: the wedding ceremony. Commonly medicinal plants have an interaction with endophytic fungi species that lived in their tissues, the interaction form is mutualism symbiotic. The research was done to: (1) identify the endophytic...

The sustainable biomass production of fuels, chemicals, and other commercial products from lignocellulosic materials has received widespread attention. One of the potential biomass resources to be developed into biofuels is tobacco stalks. Production of tobacco plants in East Java Province was 84,100...

The purpose of this study was to characterize AgNP, and determine antioxidant and antibacterial activities. This research is exploratory descriptive research. The characterization method used PSA (Particle Size Analysis) and FTIR (Fourier Transform Infrared Spectroscopy). The antioxidant activity method...

This study was prepared to determine the difference between design and construction of Temporary Houses for post-disaster Semeru eruption in 2021. From the design documents and actual construction on the site, there are some changes, and the factors that influence these changes can be seen. The eruption...

Nanocomposites of TiO2-reduced Graphene Oxide were synthesized with graphene oxide (GO) loadings of 4, 8, 12, and 16 mg via in situ sol-gel method. The raw material of graphene oxide was coconut shell charcoal which was processed using a modified Hummer’s method by dissolving the graphite into the acid...

Developing environmentally friendly transportation that is affordable, secure, and simple to use is what is meant by sustainable transportation development. One of the best strategies to reduce the usage of private vehicles is to restructure the routes of public transportation. In order to reduce the...

Data analytics is a new approach for auditors to prevent and detect fraud involving examining patterns in actual data. However, implementing data analytics requires a significant investment in hardware, software, skills, and quality control in the business world. This paper aims to analyze data analytics...

Mathematics is a science that cannot be separated from science and technology, so mastery of mathematics in the future requires the integration of technology as a form of teaching innovation in order to achieve learning objectives. This study discusses the development of teaching materials in the form...

Alas Purwo National Park has a buffer area, namely Kutorejo Subvillage, Kalipahit Village, Tegaldlimo District, Banyuwangi Regency. The communities around the buffer area have local wisdom in the use of medicinal plants. Therefore it is important to carry out an ethnobotanical study in this area as a...

The molten salt synthesis has been known as an eco-friendly synthesis method because it does not produce hazardous waste and also, there is no requirement for a high calcination temperature. In this research, we synthesized SrBi4Ti3.95Fe0.05O15 photocatalytic material via the molten salt method using...

The earthquake that occurred on April 10, 2021, with a magnitude of 6, was felt in several areas on the island of Java and Ampelgading and Tirtoyudo sub-districts are the most affected areas. Due to the impact caused by the earthquake, a method is needed to be able to reduce the destructive effects of...

Vascular endothelial growth factor receptor (VEGFR) tyrosine kinases (TKs) are clinically validated drug targets for anticancer therapy because they play an important role in the process of angiogenesis, tumor growth, and metastasis. VEGFR2 is a member of the VEGFR-Tks. VEGFR2 is an important regulator...

Some of the damage caused by earthquakes is not always caused by the strength of the earthquake or the distance from the epicenter of the earthquake to the affected buildings but is also influenced by local geological conditions. Majangtengah Village, Dampit District, Malang Regency is one of the areas...

Research on the spectrum of a graph with an algebraic structure still attracts much attention. Let Z be a commutative ring. The I ( Z ) is a graph...

Turmeric and olive oil can be combined to produce herbal oil extracts. The purpose of this study was to determine the content of active compounds and to determine the effect of variations in the concentration of extracts on antibacterial activity. Turmeric is combined with extra virgin olive oil using...

Rice bran is a by-product of the rice milling process which is rich in nutrients and bioactive compounds such as flavonoids, alkaloids, triterpenoids, and so on. Pigmented rice bran such as red rice bran is richer in bioactive compounds because it contains anthocyanin compounds. The number of bioactive...

Chicken meat is one of the primary protein sources for the Indonesian market. However, due to the warm and humid climate, chicken meat is subject to microbial contamination, i.e., Escherichia coli dan Salmonella sp. The source of the contamination is the chicken gastrointestinal environment during rearing...

Ginger is one of the most widely produced horticultural commodities from the spice and medicinal plant group compared to other commodities. Ginger can be used in the form of dry powder or the form of ginger essential oil. Ginger essential oil has properties: it is unstable and susceptible to oxidation...

This paper presents a mathematical model for dynamics of HIV transmission by considering a saturated incidence type interaction for the human to human sexual transmission. The equilibria of the model are discovered, and the basic reproduction number is calculated. The analysis shows that if the basic...

Both the increasing human population and energy consumption are the main factors which cause energy crises. In this situation, we need new alternative energy source. DSSC (Dye Sensitized Solar Cells) has great potential to develop because the dye as a light catcher can be directly applied in daily life....

In this study, response surface methodology was applied to optimize the transesterification of palm oil using zeolite-X prepared from rice husk silica and aluminum foil as a catalyst. For this purpose, response surface methodology (RSM) with a 3-level-3 factor central composite design was applied to...

Palm oil is a plantation commodity with economic value in Indonesia. Insects are one of the crucial factors influencing oil palm fruit productivity. The study aimed to identify the insect visitors on male and female palm flowers based on border habitat types and visitation times. The research was conducted...

One method of synthesizing metal oxide compounds is the molten salt method. This method is an environmentally friendly method because it does not produce waste from residual solvents and uses a lower temperature. In this research, the synthesis of the compound SrBi4Ti3.9Fe0.1O15 was carried out via...

Although Wind Turbine Generator has common use in several countries, in Indonesia, this thing is rarely used, even though Indonesia’s geographic itself stored a lot of potential in developing such an energy source. Indonesia is an archipelagic nation with five main islands and thousands of small islands....

This study discusses the development of electronic mathematics student worksheets assisted by Adobe Flash CS6 at SMAN 2 Palopo. Electronic student worksheets in mathematics were developed with the help of Adobe Flash CS6 in the form of applications that can be accessed via Android or computers. The development...

The increasing population and level of life in big cities in Indonesia has resulted in higher pollution of domestic wastewater in recent years. Efforts are urgently needed to overcome them, among others, with indigenous heterotrophic bacteria in the form of a consortium. The method used in this study...

Hydrilla verticillata is an aquatic plant that contains various secondary metabolites, such as triterpenoids and steroids. Several steroid compounds contained in Hydrilla verticillata are β-sitosterol, stigmasterol, fucosterol, campesterol, and cholesterol. Steroid compounds have the potential as candidates...

Technological developments, especially smartphones, have led to an authentication process that must be developed. One of them is the use of the iris in the authentication process. The use of the iris can increase security in the authentication process because the structure of the iris is unique and differs...

Competition and prospecting in the business world today is getting tight. It is also felt by businesses such as Xiaomi. Many other attempts that have sprung up with the characteristics of each. That customers are satisfied and do not move to another place, then the company should know the factors that...

The increased consumer demand for the freshness and safety of food products would contribute to providing new technologies, which could function intelligently and could monitor the freshness of packaged foods. Chemical indicators are often used to monitor the freshness of food, but they have toxic properties...

Background: Malaria is a disease caused by Plasmodium parasites (P. falciparum, P. ovale, P. vivax, P. malariae, P. knowlesi) infection often caused by the bite of female Anopheles mosquitoes which have Plasmodium parasites in their salivary glands. Plasmodium develops in the human liver and then invades...

This study discusses the dynamic analysis of the COVID-19 spread model in the SIHCR population with time delay to represent the behavior of the spread of COVID-19 with time delay. The SIHCR model divides the human population into five subpopulations, namely Susceptible ...

There is a difficulty in building the implementation of a computational model to build a complex Covid-19 drug design involving a smart ecosystem. Covid-19 and the drug design of its new variants are formed by combining the appropriate compound and dose as an antiviral. Drug designs as the candidates...

Oil as a basic food requirement is often misused by irresponsible individuals, such as lard mixed in palm oil. This is certainly detrimental to society. Indonesia which has a majority Muslim population will have a big influence on the authenticity of oil. FTIR can be an alternative way to distinguish...

Schiff base compounds are reported to have various biological activities, one of which is antibacterial. This study aims to determine the characterization of the Schiff base product with the sonication method and to determine its antibacterial activity. Schiff base products from 4formylpyridine and panisidine...

COVID-19 is a contagious virus that has global pandemic. Indonesia has the highest infected cases of COVID-19 in South-East Asia. The aim of the research is classified provinces in Indonesia using Fuzzy Mean Cluster (FCM) based on positive cases, recovery cases, and death cases of COVID-19. The result...

Cassava peel is the leading waste generated by the cassava processing industry. One of the regulatory efforts is to use it as a raw material for activated Carbon to adsorb dyes. This study aims to determine the adsorption capacity of activated Carbon from cassava peel waste on yellow dye. Activated Carbon...

DNA polymorphisms is variation on DNA sequence that change amino acid and gene function through changes in splicing, one of this polymorphism was SNP which only one nucleotide that change on target sequence. A survey that comprised 44 single nucleotide polymorphism (SNP)s of 31 candidate genes related...

The Hamilton decomposition of graph G is a partition of the edge set into a Hamilton cycle and 1-factor if the vertex degree is odd or a partition into a Hamilton cycle if the degree of the vertex is even. In 2020, the focus was on determining the Hamilton decomposition...

The system on the computer can make everything run quickly and efficiently, so that it becomes a tool in information processing. One of the computer systems is an Artificial Neural Network (ANN). Along with technological advances, events that require computational models to perform speech recognition...

Brain necrosis in mice can be triggered by injection of streptozotocin (STZ), causing nerve cell injury that can trigger neurodegenerative diseases. Centella asiatica (L.) Urban is one of the herbs whose triterpenoid compounds have neuroregenerative activity, so it is widely used as Centella asiatica...

Aging is a physiological process that cannot be avoided, but can be prevented by giving antioxidants. Antioxidants can be obtained from Centella asiatica extract (EkCa). EkCa has secondary metabolites that have biological effects related to inflammation and prevent aging. The purpose of this study was...

Poverty is a central issue in many countries, so one of the main goals of a country is to eradicate poverty. One of the efforts is to identify indicators that affect poverty using cluster analysis. In this research, we discuss cluster analysis using the agglomerative hierarchical clustering method based...