One of the oldest known predictive analytics techniques is time series prediction. The target in time series prediction is use historical data about a specific quantity to predicts value of the same quantity in the future. Multivariate time series (MTS) data has been widely used in time series prediction research because it is considered better than univariate time series (UTS) data. However, in reality MTS data sets contain various types of information which makes it difficult to extract information to predict the situation. Therefore, UTS data still has a chance to be developed because it is actually simpler than MTS data. UTS prediction treats forecasts as a single variable problem, whereas MTS may employ a large number of time-concurred series to make predictions. Neural Network (NN) model could be built to predict the target variable given the other (predictor) variables. In this study, we used Particle Swarm Optimization (PSO) algorithm to optimize performance of NN on a UTS dataset. Our proposed model is validated using x-validation and and use RMSE to measure its performance. The experimental results show that NN performance after optimization using PSO produces good results compared to classical NN performance. This is evidenced by the value of RMSE = 0.410 which is the smallest RMSE value produced. The smaller the RMSE value, the better the model performance. It can be concluded that the proposed method can improve NN performance on UTS data.
Ms. PowerPoint merupakan aplikasi pengolah presentasi yang banyak digunakan dalam pembuatan bahan ajar bagi guru maupun sebagai tugas presentasi bagi siswa. Saat ini Ms. PowerPoint termasuk dalam materi komputer dasar yang tidak diajarkan sebagai mata pelajaran wajib pada kurikulum SMK jurusan RPL, melainkan terintegrasi dengan mata pelajaran lain. Siswa dianggap telah mahir mengoptimalkan fitur-fitur Ms. PowerPoint seperti slide master dan hyperlink. Kendati demikian, anggapan ini tidak sesuai dengan hasil pre test yang dilakukan. Data hasil pre test menunjukkan 89% siswa menggunakan Ms. Power Point sebagai aplikasi pengolah presentasi, namun hanya 36% siswa yang memiliki pengetahuan pemanfaatan fitur-fitur Ms. PowerPoint. Menyikapi hal tersebut tim pelaksana Pengabdian kepada Masyarakat (PkM) STMIK Muhammadiyah Paguyangan Brebes melakukan kegiatan pelatihan dengan tujuan melatih siswa membuat media presentasi dengan mengoptimalkan fitur slide master dan hyperlink. Hasil ketercapaian kegiatan pelatihan berdasarkan analisis pre test dan post test menggunakan metode Gain Scores membuktikan bahwa sebanyak 75% siswa mengalami peningkatan kemampuan dengan kriteria tinggi dan 25% siswa dengan kriteria sedang.
Kegiatan pengabdian kepada masyarakat ini bertujuan membantu siswa SMK yang terdampak Corona Virus Disease 2019 (Covid-19) dalam pembelajaran daring dan penyelesaian tugas-tugas yang berkaitan dengan equation & symbol. Prosedur pelaksanaannya meliputi perizinan, wawancara, observasi, menyiapkan modul dan administrasi, kegiatan pelatihan, kegiatan pendampingan, evaluasi, tindak lanjut, dan analisis serta interpretasi data yang dilaksanakan pada 8 November 2021. Hasil kegiatan pengabdian kepada masyarakat adalah pemahaman tentang pemanfaatan menu equation & symbol, praktik menulis rumus matematika yang mudah, sedang, sampai rumit dalam menyelesaikan tugas-tugas sekolah, dan adanya peningkatan klasikal maupun individual dalam kategori sedang. Berdasarkan hasil kegiatan disarankan eksplorasi pemanfaatan menu equation & symbol, adanya praktek dalam jangka waktu yang lebih lama untuk rumus matematika yang tergolong rumit, tindak lanjut dan pelatihan berkala dengan bidang lain yang berhubungan dengan pemanfaatan fitur-fitur microsoft power point disertai dengan pencapaian peningkatan klasikal maupun individual sampai dengan kategori tinggi. This community service activity aims to assist SMK students affected by Corona Virus Disease 2019 (Covid-19) in online learning and completing equations and symbols-related tasks. The implementation procedure includes licensing, interviews, observations, module preparation and administration, training and mentoring activities, evaluation, follow-up, and data analysis and interpretation, which will be carried out on November 19, 2021. The community service activities result in an understanding of the use of the equation & symbol menu, the practice of writing easy, medium, to complex mathematical formulas in completing school assignments, and an increase in classical and individual in the medium category. Based on the results of the activity, it is recommended to explore the use of the equation & symbol menu, practice for a longer period for complex mathematical formulas, follow-up and regular training with other fields related to the use of Microsoft PowerPoint features accompanied by the achievement of classical and individual to high category.
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