Judul: Analisis Kebutuhan dan Kendala pada Pelaku Rantai Pasok Kentang Dieng dengan Metode Interpretive Structural Modeling
Abstrak: Potato (Solanum tuberosum L) is a horticultural product that can be used for diversification product as a substitute for rice. Dieng Plateau in Central Java is a center of potato production which contributes 23.63% of the national potato production. The purpose of this study is to identify and analyze the supply chain and identify key elements of the needs and constraints in the supply chain actors of Dieng potato. On this research, Interpretive Structural Modeling is used to explain the relationship between needs and constraints on the actors of supply chain. Potato supply chain that is based on final goal in general can be classified into three major flows, which are traditional market, modern market and manufacture industry. Farmer and combined farmers groups (Gapoktan) are two main actors that give most impact toward other actors, with needs infrastructure availability, training and credit helps for capital. The constraints of actors that cause other constraints are weather and climate that easily change and farmer capital that are limited
Keyword: supply chain, interpretive structural modeling, needs, constraints, actors

Judul: Disain model perilaku agent yang terlibat dalam rantai pasok kentang industri
Abstrak: In generally there are two types of potatoes. The first is potatoes for consumption and the second is potatoes for industry. Both kinds of are cultivated in Pangalengan. Those two types of potatoes have different characteristics seen their functions and uses. This potatoes business is run by involving some agents. These agents have relationship one and another in term of information exchange and the distribution of potatoes commodity. In this model, there are three agents involved, namely producer agent, supplier agent and consumer agent. The three agent have different roles according to their functions and characteristics. The roles of producer agent are passive, the role of supplier agent is semi-active and the roles of consumer agent are active. These roles make different behaviors. Such behaviors can affect the supply of potatoes produced by each of the agents, so if there is deviant behavior among those agents, it will affect the supply of potatoes and cause losses among the agent. Each agent involved in the potatoes supply chain is autonomous. The model was developed to address the issue of perception and business aspects. JADE is used as the approach of implementation to behavioral models to agents in the potatoes supply chain.
Keyword: agent behaviors, the potatoes supply chain, multi-agent systems

Judul: Durability of Specific Immunoglobulin (Ig) Y Againts Influenza and Covid-19 in Sunscreen
Abstrak: The benefit of specific immunoglobulin Y (Ig Y) as an active ingredient in personal care products such as sunscreen has not been properly studied. Our study aims to evaluate the reliability of specific IgY against influenza and the COVID-19 virus in a sample sunscreen product. Specific IgY influenza and COVID-19 viruses were inserted in the sample sunscreen at two concentrations of 0.1% and 0.25%. Three treatments were observed: control (C) sunscreen without IgY, treatment 1 (T1) sunscreen with 0.1% IgY, and treatment 2 (T2) sunscreen with 0.25% IgY. Organoleptic observations were carried out to monitor changes in aroma, color, and texture, and sunscreen sampling was done every week for 6 weeks. The durability of IgY was evaluated using an enzyme-linked immunosorbent assay (ELISA) and a neutralization assay. Organoleptic observation from weeks 1 to 6 showed consistency in its aroma, color, and texture. Enzyme-linked immunosorbent assay and neutralization assay (NA) results of the T1 and T2 groups showed negative results except for sample T1 at week 5, which showed a positive result in the Influenza A ELISA. Based on the results, it seems that IgY concentrations of 0.1% or 0.25% were not optimal. However, this negative result might be due to low concentration of the IgY and the presence of beeswax, which inhibits IgY and causes it to dissolve in distilled water, thus preventing it from being detected in the assay.
Keyword: Immunoglobulin Y, Sunscreen, Influenza, COVID-19, Biological Activity