Judul: Effectiveness Instagram as a Promotional Media for Jenthik Indonesia MSMEs
Abstrak: Seiring dengan perubahan zaman banyak sekali hal yang dapat diadaptasi, salah satunya yaitu teknologi. Media sosial merupakan hasil dari perkembangan teknologi, beberapa jenis media sosial diantaranya Instagram, TikTok, WhatsApp, dan lain sebagainya. Jenthik Indonesia menggunakan media sosial untuk melakukan promosi terhadap usahanya, sehingga dapat memperluas jangkauan serta menarik konsumen. Adapun tujuan dari penelitian ini adalah untuk menganalisis efektivitas Instagram sebagai media promosi, menelaah hubungan karakteristik konsumen dan hubungan karakteristik konten pada usaha Jenthik Indonesia. Metode yang digunakan dalam penelitian ini adalah pendekatan kuantitatif melalui survei. Responden yang digunakan berjumlah 63 responden. Penelitian ini juga menggunakan pendekatan kualitatif melalui wawancara mendalam dengan informan yaitu CEO dan CMO Jenthik Indonesia. Hasil penelitian menunjukkan bahwa Instagram efektif sebagai media promosi, karakteristik konsumen tidak memiliki hubungan yang signifikan pada efektivitas media promosi, dan karakteristik konten Instagram memiliki hubungan yang nyata dengan efektivitas media promosi., As time changes, many things can be adapted, one of themis technology. Social media is one of technological developments, there are various kinds of social media including Instagram, TikTok, WhatsApp, et cetera. Jenthik Indonesiauses social media to promotional purposes its business, so it can expandtheir reach and attract consumers. This research aims to analyze the effectiveness of Instagram as a promotional media, examine the relationship between consumer and content characteristics in Jenthik Indonesia businesses. The method usedinthis research is a quantitative approach through surveys. The number of respondents used was 63 respondents. This research also uses a qualitativeapproach through in-depth interviewed with CEO and CMO of Jenthik Indonesia. The results of the research show that Instagram is effective as a promotional media, consumer characteristics do not have a significant relationship totheeffectiveness of promotional media, and Instagram content characteristics haveareal relationship with the effectiveness of promotional media.
Keyword: media sosial, efektivitas Instagram, media promosi

Judul: Effectiveness of Promotion Through Instagram in Marketing of Micro Small and Medium Enterprise Products
Abstrak: Micro, small and medium enterprise (MSME) have an important role in the Indonesian economy. To foster consumer interest in trying and buying MSME products, marketing strategies are needed, one of the strategies promotion through the internet such as Instagram. The objective of this research is to analyze of the effectiveness of promotion through Instagram and with all the factors. The study used a survey method with distribute an online questionnaire supported by qualitative data in the form of in-depth interviews with respondents and informants. The number of respondents in the study are 40 people purposively choosed through the population of @Cilokkujang’s followers. This research shows that Instagram is an effective medium in promoting to @Cilokkujang’s followers. However, the results showed that there was no correlation between the characteristics of the respondents and the effectiveness of the promotion and there was no correlation between the characteristics of the respondents and the level of exposure of Cilok Kujang's Instagram followers. From research results show there is a strong correlation between the level of exposure of Instagram social media and the effectiveness of promotions. The more often followers receive messages and provide feedback, the wider the information conveyed, the higher the effectiveness of the promotion.
Keyword: Marketing, micro small and medium enterprises, Social Media

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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