Judul: Strategi Optimasi Pemasaran Digital untuk Meningkatkan Brand Awareness terhadap Gula Kelapa Koperasi WS Purworejo
Abstrak: Coconut (Cocos nucifera L.) is one of the commodities in Purworejo, Central Java. Palm sugar is coconut sugar in the form of powder that can be made from sap that has been added to laru solution and heated at a certain temperature. This research aims to increase brand awareness through digital marketing. Digital marketing is a marketing communication channel used by marketers to support their products and services to the market, especially the sale and purchase of products and services through computer networks or internet networks. Brand awareness is closely related to the ability of a brand's presence and imprint in the minds of customers to identify the brand in various market conditions. The lack of marketing through digital means that the products marketed by the WS Cooperative are still unknown to the public. In its business process, the WS Cooperative has implemented a 4C marketing mix strategy, but it is still not optimal. To overcome these problems, the WS Cooperative can implement a new 4C marketing mix by optimizing the website, ecommerce, and social media to attract consumers' interest in submitting their suggestions and input., Kelapa (Cocos nucifera L.) merupakan salah satu komoditi yang ada di Purworejo, Jawa Tengah. Gula semut adalah gula kelapa berbentuk serbuk yang dapat dibuat dari nira yang telah ditambahkan larutan laru dan dipanaskan pada suhu tertentu. Tujuan dari penelitian ini meningkatkan kesadaran merek melalui pemasaran digital. Pemasaran digital adalah saluran komunikasi pemasaran yang digunakan oleh pemasar untuk mendukung produk dan layanannya ke pasar, terutama penjualan dan pembelian produk, dan layanan melalui jaringan komputer atau jaringan internet. Kesadaran merek sangat terkait dengan kemampuan kehadiran suatu merek dan jejak di benak pelanggan untuk mengidentifikasi merek tersebut dalam berbagai kondisi pasar. Kurangnya pemasaran melalui digital membuat produk yang dipasarkan oleh Koperasi WS masih belum dikenal oleh masyarakat. Dalam proses bisnisnya, Koperasi WS telah menerapkan strategi bauran pemasaran 4C, namun masih belum optimal. Untuk mengatasi permasalahan tersebut, Koperasi WS dapat mengimplementasikan bauran pemasaran 4C yang baru dengan mengoptimalkan website, e-commerce, dan jejaring sosial untuk menarik minat konsumen dalam menyampaikan saran dan masukannya.
Keyword: Brand awareness, digital marketing, marketing mix 4C, palm sugar, Bauran pemasaran 4C

Judul: The Optimizing Digital Marketing To  Increase Brand Awareness Sudut Lombok
Abstrak: Perkembangan teknologi yang berkembang kian pesat dimanfaatkan oleh perusahaan untuk melakukan aktivitas digital marketing. Sudut Lombok memanfaatkan pemasaran digital dalam meningkatkan brand awareness kepada pelanggan potensial. Adapun tujuan penelitian ini dilakukan adalah (1) Mengidentifikasi strategi digital marketing yang telah dilakukan oleh Sudut Lombok dalam membangun brand awareness, (2) Mengukur tingkat brand awareness Sudut Lombok pada pelanggan potensial, (3) Menentukan solusi usulan penerapan strategi digital marketing yang tepat dalam meningkatkan brand awareness. Penelitian ini menggunakan bauran pemasaran 4C dalam mengidentifikasi aktivitas pemasaran Sudut Lombok serta piramida brand awareness untuk mengukur tingkat brand awareness. Hasil dari penelitian dapat diketahui strategi digital marketing, tingkat brand awareness serta solusi digital marketing yang tepat dengan mengoptimalisasi media pemasaran yang digunakan oleh Sudut Lombok., The development of technology that is growing rapidly is utilized by companies for digital marketing activities. Sudut Lombok is one of the businesses that utilize digital marketing to increase brand awareness to potential customers. The purpose of this research is (1) Identifying digital marketing strategies that have been carried out by Sudut Lombok in building brand awareness, (2) Measuring the level of brand awareness of Sudut Lombok in potential customers, (3) Determining the solution proposed implementation of the right digital marketing strategy in increasing brand awareness. This study used the marketing mix 4C in identifying Sudut Lombok marketing activities and used the brand awareness pyramid to measure the level of brand awareness of Sudut Lombok. The results of the research can be known digital marketing strategies, level of brand awareness and the right digital marketing solutions by optimizing the marketing media used by Sudut Lombok.
Keyword: brand awareness,, brand awareness pyramid, digital marketing, marketing mix 4C

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