These days, computer technology has been a great need to us humans, especially in medical experts, which evaluated to adopt humans’ ability and knowledge to the computers. So that the computer is capable of solving problems like what an expert is capable of doing. The main purpose of developing the expert system is to substitute all kinds of humans’ knowledge to the technology that it can be useful to the public to solve some specific problems. The application of the expert system made with programming language based on PHP web and MySQL as the database. The method used is Forward Chaining. Expert system can mainly be used to diagnose diseases such as tuberculosis using Bayes method that can diagnose and identify the tuberculosis according to its symptoms.

<p class="s11"><span class="s17"><span class="bumpedFont15">Kesehatan gigi dan mulut adalah indikator kesehatan masyarakat. Adanya masalah kesehatan pada gigi dan mulut menyebabkan penurunan fungsi kesehatan individu. Masalah kesehatan gigi dan mulut disebabkan oleh kebiasaan seseorang menyikat gigi secara tidak teratur. Banyak pilihan yang dapat dibuat untuk sampai ke lokasi di mana klinik gigi terdekat diinginkan, tetapi ada keadaan di mana klinik gigi yang direncanakan tidak buka. Oleh karena itu dibutuhkan rute terpendek untuk sampai ke klinik gigi lain. Data dalam bentuk jarak, waktu dan rute untuk sampai ke klinik gigi yang diinginkan diambil dari peta </span></span><span class="s18"><span class="bumpedFont15">Google</span></span><span class="s17"><span class="bumpedFont15">, dengan total 10 simpul untuk diterapkan ke peta (</span></span><span class="s18"><span class="bumpedFont15">maps</span></span><span class="s17"><span class="bumpedFont15">). Untuk hasil peta, sebuah algoritma digunakan, dalam hal ini algoritma </span></span><span class="s18"><span class="bumpedFont15">Greedy</span></span><span class="s17"><span class="bumpedFont15"> </span></span><span class="s17"><span class="bumpedFont15">digunakan untuk memecahkan masalah menemukan rute terpendek. Berdasarkan hasil penelitian dari klinik gigi terdekat dengan titik awal yang dicari menggunakan algoritma </span></span><span class="s18"><span class="bumpedFont15">Greedy</span></span><span class="s17"><span class="bumpedFont15"> itu menghasilkan total jarak, waktu perjalanan dan titik yang dilalui.</span></span></p>

This research is a type of development research. The product development model adopts a software development model consisting of (1) Analysis of software requirements, (2) design, (3) writing code and (4) testing. Data collection techniques are done by observation, interviews and questionnaires. The testing phase is carried out with product validation by experts, testing on the first user (lecturer) and testing on the end user (student).Keywords : Learning Media, Mobile Applications, Algorithms and Programming.

Changes that occur in the region is one of the problems that are considered significant and strategic that occur in each region specifically in the region ofb. one of the important issues for planners and decision makers in urban and regional policies. Data, information, and tools sometimes turn into a burden in the process of detecting changes in land use. Along with advances in technology to detect changes in an area that are usually done manually (visible, ordinary photos), now it has begun to shift to the use of image technology (satellite), where this is caused by satellite technology, enables the detection of regional changes to be carried out on a wide scale, the time required is more effective and effective compared to conventional regional change detection techniques. Change detection (change detection) is a process of identifying changes in the shape of the surface in a vegetation cover or as a spectral / spatial movement of vegetation bodies over time. Among the change detection methods is to use Post-Classification with consideration of the ease of implementation, where this method works by comparing 2 or more temporal images. Keywords: Detection of Regional Change, Post-Classification Method, application.