Judul: Penentuan Lokasi Ideal Berdasarkan Total Jarak Tempuh Terpendek dari Berbagai Lokasi Menggunakan Algoritme Dijkstra
Abstrak: Finding shortest path is a method to maximize time efficiency to travel from one place to another. A good location is a place with minimum path from locations where it is accessed. A good location is considered to be potential for public facility, housing complex, etc. In this research, graph theory is used to solve the problem of deciding location with minimum path from accessing locations. Mapping of a region is represented as a graph with location points and accessing locations as nodes and variation paths as arcs. The next step is finding the shortest path for every location candidate nodes from accessing nodes using Dijkstra algorithm. This research resulted in a web based aplication that presents a territory map and a user can choose where the location candidates and accessing locations are. The user will be shown the best location out of location candidates.
Keyword: Bogor Agricultural University (IPB), shortest path, region mapping, graph, Dijkstra algorithm

Judul: Aplikasi Mobile Penentuan Rute Terpendek di Kebun Raya Bogor Menggunakan Algoritme Dijkstra
Abstrak: Bogor Botanical Gardens (BBG) has many trees, plant collections, and points of interest which located in a wide area around 87 hectares. In addition, BBG also has a museum building, laboratory, and many important places which give difficulty for a person to reach those location. Because of the distance of each location, navigation or guide becomes essential for travelers who want to looking around BBG with optimum time. These problems can be solved by graph modelling to determine the shortest route from each location using Dijkstra algorithm. Based on the results of comparative testing in applications with spacing distance pedometer difference obtained an average error distance is 65.3 meters, this is because the location coordinate data obtained from different Google Maps with location coordinates of the received GPS signal while in KRB on pedometer application.
Keyword: Bogor Agricultural University (IPB), Dijkstra algorithm, shortest path, graphs, navigation

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