In ordered to prevent the transmission of Covid-19, the government of Tarakan city quarantines immigrants who entered Tarakan city. The government of Tarakan city have created a procedure for implementing the quarantine. Based on these procedures, this article aims to model the quarantine procedure using a Petri net. The Petri net model of the quarantine procedure for immigrants in the context of preventing Covid-19 in Tarakan City consists of eighteen transitions and sixteen places. The evolution of circumstances indicated by the matrix analyzed against the quarantine procedure for domestic immigrants with the final destination of Tarakan city. The determination of marking must be determined seriously so that this quarantine procedure can run smoothly according to purpose. The number of officers must be carefully taken into account so that there is no accumulation of queues of immigrants who was carry out the inspection. The capacity of quarantine places and hospitals must also be well prepared so that they are always available and ready to accept immigrants who was be quarantined.

The global pandemic Covid-19 impacts are so wide that almost no country or region in the world is absent. The increase in the number of cases occurred in a short time so that it needed to be handled as soon as possible. One of the impacts of this pandemic includes paralyzing economic activities and hampering educational activities. SMK Terpadu Citra Bangsa, Tarakan City of North Kalimantan Province, has implemented health protocols well by providing a place to wash hands and make hand sanitizers independently, however, there are still shortcomings in its implementation. These deficiencies include low awareness of using these facilities. Therefore, it is necessary to have a comprehensive understanding of health protocols by every school members. This community service activity is done to facilitate the school members facing a new normal era. Divided into several stages, namely location survey, socialization of activities, technical guidance, implementation of activities, and evaluation, the activities are going well and 87% of the participants understand the given explanation. Hence, we can conclude that this activity is able to foster the awareness and responsibility of the school personnel in implementing health protocols and maintaining cleanliness and health in the current new normal. Pandemi global Covid-19 berdampak sangat luas sehingga hampir tidak ada negara atau wilayah di dunia yang absen. Peningkatan jumlah kasus terjadi dalam waktu singkat sehingga perlu ditangani secepatnya. Salah satu dampak pandemi ini antara lain melumpuhkan kegiatan ekonomi dan terhambatnya kegiatan pendidikan. SMK Terpadu Citra Bangsa Kota Tarakan Provinsi Kalimantan Utara telah menerapkan tata tertib kesehatan dengan baik dengan menyediakan tempat cuci tangan dan membuat hand sanitizer secara mandiri, namun masih terdapat kekurangan dalam pelaksanaannya. Kekurangan tersebut termasuk rendahnya kesadaran dalam menggunakan fasilitas tersebut. Oleh karena itu, diperlukan pemahaman yang komprehensif tentang protokol kesehatan oleh setiap warga sekolah. Kegiatan pengabdian masyarakat ini dilakukan untuk memfasilitasi warga sekolah menghadapi era normal baru. Terbagi dalam beberapa tahapan yaitu survey lokasi, sosialisasi kegiatan, bimbingan teknis, pelaksanaan kegiatan dan evaluasi, kegiatan berjalan dengan baik dan 87% peserta memahami penjelasan yang diberikan. Dengan demikian, dapat disimpulkan bahwa kegiatan ini mampu menumbuhkan kesadaran dan tanggung jawab aparatur sekolah dalam melaksanakan tata tertib kesehatan dan menjaga kebersihan dan kesehatan dalam kondisi normal yang baru.

The model obtained in this study is expected to be able to describe the dynamics of the resources and processing of soybeans into tempeh. An understanding of the tempeh production process is obtained from direct observation and also from appropriate references. Furthermore, a petri net model and simulation of the tempeh production process was made with several assumptions that have been adjusted to the results of observations in the field. Obtained a petri net consisting of 14 places and 10 transitions. From the simulation results,   must be reachable to reach the final state that has been determined with several assumptions.

The chopper is a machine that is widely used to assist agricultural product processing activities, the most common problem is that the chopper machine will experience a decrease in efficiency if it is used frequently or the machine has passed a service life of more than three years. Another thing that often happens is that the main driving components, namely the dynamo, pulley, v-belt and chopper, wear out so that the efficiency of the engine decreases. Modeling using the petri net method aims to understand the dynamics that occur in the chopper. The chopper is said to be good in this modeling if it does not experience deadlocks and there are no long queues. The resulting Petri Net consists of four places and five transitions. Each place and transition describes the dynamics of the chopper. The transition  is a critical transition which, if enabled and fired, will cause the engine to turn off and make the queue to be chopped more and more. This happens because the initial assumption that is built requires that every enable transition will be immediately fired, namely the .Key words: Petri Net, Chopping Machine, ModelingAbstrakMesin pencacah merupakan suatu mesin yang banyak digunakan untuk membantu kegiatan pengolahan hasil pertanian, permasalahan yang banyak terjadi yaitu mesin pencacah akan mengalami penurunan efisiensi jika sering dipakai atau mesin tersebut sudah melawati masa pakai di atas tiga tahun. Hal lain yang sering terjadi yaitu komponen penggerak utama yaitu dynamo, pulley, v-belt dan chopper mengalami keausan sehingga efisiensi mesin mengalami penurunan. Pemodelan dengan menggunakan metode petri net bertujuan untuk memahami dinamika yang terjadi pada mesin pencacah. Mesin pencacah dikatakan baik pada pemodelan ini jika tidak mengalami deadlock dan tidak terdapat antrian yang panjang. Petri Net yang dihasilkan terdiri dari empat place dan lima transisi. Masing-masing place dan transisi menggambarkan dinamika pada mesin pencacah. Transisi  menjadi transisi kritis yang apabila enable dan difire akan mengakibatkan mesin off serta membuat antrian yang akan dicacah menjadi semakin banyak. Hal ini terjadi karena asumsi awal yang dibangun mengharuskan setiap transisi enable akan langsung difire, yaitu transisi .Kata kunci: Mesin Pencacah, Pemodelan, Petri Net

Telah dilakukan analisis pada sistem pengenalan gambar empat buah bendera negara rumpun melayu secara digital. Negara tersebut adalah Indonesia, Malaysia, Singapura, dan Brunei Darussalam. Tujuan dari penelitian ini adalah sebagai bentuk langkah awal dalam melatih sistem Artificial Intelligence (Kecerdasan Buatan) dalam membedakan empat buah negara rumpun melayu berdasarkan warna dan motif bendera pada sebuah peta digital. Proses analisis dan pelatihan pengenalan bendera tersebut menggunakan metode Feed Forward Neural Network (FFNN). Hasilnya menunjukkan bahwa penggunaan 4 buah Hidden Layer, serta penggunaan Learning Rate 0,5 memberikan kemampuan pengenalan citra bendera secara tepat dengan persentase akurasi rata-rata mencapai 74,15%.