Seiring dengan perkembangan Ilmu Pengetahuan dan Teknologi, industri otomotif juga mengalami perkembangan yang pesat sehingga meningkatkan persaingan diantara produsen otomotif untuk menciptakan produk yang sesuai dengan kebutuhan dan selera konsumen. Selain persaingan yang semakin ketat dealer juga dihadapkan dengan permasalahan covid-19 yang masuk ke indonesia sejak bulan maret 2020 yang berdampak bagi perekonomian masyarakat indonesia. Pandemi covid-19 secara langsung maupun tidak langsung menurunkan daya beli sebagian besar masyarakat. Data penjualan mobil pada PT-X Jayapura pada periode Maret 2020 hingga November 2021 memiliki pola yang mengandung faktor trend dan musiman sehingga pada penelitian ini akan diramalkan menggunakan metode triple exponential smoothing. Adapun dalam proses peramalan digunakan nilai . Untuk mengukur ketepatan akurasi peramalan pada penelitian ini digunakan Mean Squared Error (MSE) dan Mean Absolute Percentage Error (MAPE), dan diperoleh nilai MSE terkecil 6,51493 dengan nilai  dan nilai MAPE terkecil 7,77 % dengan nilai . Peramalan penjualan mobil pada PT-X Jayapura pada bulan desember 2021 sebanyak 58 unit.

Penulisan Karya Ilmiah merupakan hal yang penting dalam dunia akademisi, misalnya pada mahasiswa jenjang Strata-1, untuk mendapatkan gelar sarjana maka mahasiswa harus membuat karya tulis ilmiah berupa skripsi. Akan tetapi penulisan skripsi menjadi salah satu faktor penghambat kelulusan yang dihadapi oleh PAM GKI Diaspora Kotaraja, yang sebagian besar anggotanya berstatus sebagai mahasiswa. Hal ini disebabkan karena minimnya pengetahuan dan kemampuan mahasiswa dalam penulisan skripsi. Oleh karena itu, kegiatan pengabdian ini bertujuan untuk memberikan stimulus dan meningkatkan kompetensi peserta dalam menulis karya ilmiah. Metode yang dilakukan pada kegiatan ini adalah pelatihan dan pendampingan, yang dibagi menjadi tiga sesi yaitu: sesi penyampaian materi, sesi diskusi dan praktikum, serta sesi evaluasi. Hasil yang diperoleh dari kegiatan ini yaitu adanya peningkatan yang signifikan mengenai pengetahuan dan kemampuan peserta dalam menulis karya ilmiah. Selain itu kegiatan ini juga memberikan dampak yang positif bagi peserta pelatihan karena memotivasi peserta untuk menyelesaikan skripsi. Berdasarkan hasil yang diperoleh, maka dapat disimpulkan bahwa kegiatan pengabdian kepada masyarakat yang telah dilakukan, berhasil dan tepat sasaran.

The COVID-19 pandemic has had an impact on education in Indonesia. The learning process that was initially carried out at school became learning carried out from home online. This condition caused the unpreparedness of various parties, including students who live at the Balim Yalimo Orphanage in Jayapura City. To overcome this, PKM activities are carried out which aim to improve the ability of students at the orphanage, in using the Google Classroom application as a support for online learning. The method used is a training and mentoring which consists of 3 stages, namely the preparation, implementation, and evaluation stages. The results obtained are that from 70% of participants who use Google Classroom as an online learning application, there are 43% of participants who are able to use the application well. However, after participating in the training, there was an increase in the ability of participants to use the Google Classroom application by 42%.Keywords: application; google classroom; training; online learning

One method that can be used to calculate the inverse of a matrix is ​​the adjoin method. In this method, the process begins by calculating the value of the determinant and adjoin of a matrix. This study discusses a method for calculating the inverse, especially on the Vandermonde matrix using partial fraction decomposition. The advantage of this method is that it can calculate the inverse of a matrix, without the need to calculate the value of the determinant and adjoin of a matrix. The steps taken are to define a rational function and then write it in the form of a partial fraction, then by using a formula to calculate the coefficient of a partial fraction, a formula is derived to calculate the inverse of the Vandermonde matrix. After obtaining the formula for calculating the inverse, then comparing the results of the inverse calculation of the Vandermonde matrix using the partial fraction decomposition method with the adjoin method. The results obtained a formula to calculate the inverse of the Vandermonde matrix, V-1=WxA. Based on the case examples given, it can be concluded that the results of the inverse calculations performed using the partial fraction decomposition method are the same as the results of the calculations performed using the adjoin method. However, the calculations performed using the partial fraction decomposition method are more effective and efficient than using the adjoin method

One of the crucial things in the insurance business is determining the amount of IBNR claim reserves. The amount of IBNR's claim reserves is uncertain so it is necessary to estimate as accurately as possible. The estimation results of IBNR's claim reserves will affect the solvency and sustainability of the company. To calculate the estimated IBNR claim reserves, several approaches are used both deterministically and stochastically. This study uses a stochastic model with the GLM approach for data that is assumed to have an ODP distribution. Besides, this study also uses 2 different methods to calculate parameter estimates in the model, namely by performing parameter transformations and using the Verbeek algorithm. This study will compare the results of the IBNR claim reserve estimation obtained using these two methods in estimating the parameters in the model. The estimation results obtained indicate that the value of the IBNR claim reserves is the same. The advantage of the Verbeek algorithm is that the resulting parameter values ​​have interpretations.