Judul: Strategi Implementasi Customer Path 5a Toko Online Kuliner Berdasarkan Social Media Marketing Instagram
Abstrak: Warung jajanmu sebagai toko online kuliner menggunakan Instagram sebagai SMM. Evaluasi SMM dilakukan untuk mendapatkan hasil yang optimal dalam mendapat jangkauan pasar yang lebih luas. Metode Customer Path 5A dan Importance Performance Analysis (IPA) digunakan untuk mendapatkan hasil dari penggunaan SMM instagram. Penelitian ini memakai Purposive Sampling dengan jumlah responden 50 orang. Hasil penelitian menunjukkan peran instagram dalam pemasaran warung jajanmu dapat dilihat dari insight dan iklan. Hasil analisis strategi untuk SMM warung jajanmu sebagai berikut: 1. Peningkatan jangkauan akun warung jajanmu melalui atribut share, 2. Peningkatan performa interaksi melalui konten yang interaktif, 3. Pembuatan jadwal iklan secara sistematis dan terukur, 4. konsistensi pemilik dalam berinteraksi kepada akun instagram warung jajanmu ,5. Penyesuaian tema konten iklan dengan kondisi pasar, 6. Pengembangan fase Advovate sebagai prioritas, 7. Atribut prioritas dari IPA yaitu Menghasilkan Pembelian, Share, Value, Informativeness, Kreativitas, Word of Mouth, Interaction performanya harus ditingkatkan, Warung jajanmu as a culinary online shop uses Instagram as SMM. SMM evaluation is carried out to get optimal results in getting a wider market reach. The Customer Path 5A and Importance Performance Analysis (IPA) methods are used to obtain results from the use of Instagram SMM. This study uses purposive sampling with the number of respondents 50 people. The results of the study show that the role of Instagram in the marketing of warung jajanmu can be seen from the insights and advertisements. The results of strategy analysis for the SMM warung jajanmu are as follows: 1. Increasing the reach of your warung jajanmu account through the share attribute, 2. Improved interaction performance through interactive content 3. Making a systematic and measurable advertising schedule 4. owner consistency in interacting with the warung jajanmu instagram account 5. Adjusting the theme of advertising content to market conditions, 6. Development of the Advovate phase as a priority, 7. The priority attributes of IPA are Generate Purchase, Share, Value, Informativeness, Creativity, Word of Mouth, Interaction performance must be improved.
Keyword: customer path 5A, importance performance analysis, instagram, social media marketing

Judul: Pengaruh Social Media Marketing dan Indikatornya Terhadap Customer Engagement Pada Magang Update (Studi pada pengikut akun Instagram @magangupdate di Jabodetabek)
Abstrak: Pemanfaatan media sosial sebagai salah satu media komunikasi dan berbagi informasi merupakan strategi pemasaran yang sedang banyak digunakan di mana dianggap mampu membangun keterlibatan dengan konsumen melalui konten menarik yang diunggah. Tujuan penelitian ini adalah untuk menganalisis pengaruh Social Media Marketing dan empat indikatornya yaitu Context, Communications, Collaboration, dan Connection terhadap Customer Engagement, serta mengidentifikasi indikator yang paling berpengaruh terhadap Customer Engagement pada akun Instagram Magang Update. Penelitian menggunakan sampel yaitu pengikut akun Instagram Magang Update yang di mana pengumpulan data menggunakan kuesioner yang diberikan kepada 100 responden. Data yang dikumpulkan kemudian dianalisis menggunakan metode analisis deskriptif dan Structural Equation Modelling-Partial Least Square (SEM-PLS). Hasil dari penelitian menunjukkan bahwa Social Media Marketing secara langsung berpengaruh positif dan signifikan terhadap Customer Engagement, sedangkan keempat indikator lain yaitu Context, Communications, Collaboration, dan Connection secara tidak langsung berpegaruh positif dan signifikan terhadap Customer Engagement, dan Connection adalah indikator yang paling mempengaruhi Customer Engagement pada akun Instagram Magang Update., The use of social media as a medium of communication and information sharing is a marketing strategy that is being widely used wich is considered capable of building engagement with consumers through interesting published content. The research objective is to analyze the effect of Social Media Marketing and its indicators that is Context, Communications, Collaboration, and Connection on Customer Engagement, also which indicators have the most influence on Customer Engagement on Magang Update Instagram account. Data collection is performed by distributing the questionnaire to 100 followers of Magang Update on Instagram. The data analysis uses descriptive analysis and Structural Equation Modeling by Partial Least Square (SEM PLS) method. The results of the study indicate that Social Media Marketing has a positive and significant direct effect on Customer Engagement, while the other four indicators there are Context, Communications, Collaboration, and Connection have a positive and significant indirect effect on Customer Engagement, and Connection is the most influential indicator on Customer Engagement on Magang Update Instagram account.
Keyword: customer engagement, Instagram, social media marketing

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model