Judul: Model Minat dan Perilaku Konsumsi Produk Skincare Organik Menggunakan Extended Theory of Planned Behavior.
Abstrak: Minat konsumsi produk skincare di Indonesia terus meningkat termasuk skincare organik. Namun demikian, masih terdapat beberapa faktor yang menjadi kendala yang menghambat minat menggunakan produk skincare organik. Penelitian ini bertujuan untuk mengetahui faktor-faktor yang memengaruhi minat dan perilaku konsumsi produk skincare organik menggunakan Extended Theory of Planned Behavior (ETPB). Penelitian ini melibatkan 200 responden pengguna skincare berusia 18-60 tahun yang dipilih secara purposive voluntary sampling technique. Structural Equation Model (SEM) digunakan sebagai basis analisis untuk menduga koefisien model kausalitas antar faktor. Hasil penelitian menunjukkan bahwa sikap konsumen dipengaruhi oleh kesadaran kesehatan dan kepedulian lingkungan. Sikap dan PBC memberikan pengaruh positif dan signifikan terhadap minat konsumsi. Namun, norma subjektif memiliki pengaruh negatif terhadap minat konsumsi. Minat konsumsi produk skincare organik memiliki pengaruh yang signifikan terhadap perilaku konsumsi produk skincare organik., Interest in consuming skincare products in Indonesia continues to increase, including organic skincare. However, there are still several factors that are still obstacles that hinder interest in using organic skincare products. This study aims to determine the factors that influence interest and consumption behavior of organic skincare products using the Extended Theory of Planned Behavior (ETPB). This study involved 200 skincare user respondents aged 18-60 years who were selected using a purposive voluntary sampling technique. The Structural Equation Model (SEM) is used as a basis for analysis to estimate the causality model coefficients between factors. The results showed that consumer attitudes were influenced by health awareness and environmental concern. Attitudes and PBC have a positive and significant impact on consumption intentions. However, subjective norms have a negative influence on consumption intention. The interest in consuming organic skincare products has a significant influence on the behavior of consuming organic skincare products.
Keyword: skincare organik, extended theory of planned behavior, SEM

Judul: Analysis of Green Purchase Intention in Organic Cosmetics using the Theory of Planned Behavior Approach
Abstrak: Persaingan bisnis semakin tinggi membuat perusahaan harus meningkatkan daya saing dari kompetitor dimana tidak fokus ke profit tetapi juga planet dan people contohnya dengan produksi green product. Tingginya pertumbuhan dan pendapatan industri kosmetik per tahun serta semakin banyaknya merek kosmetik organik yang beredar sehingga penting untuk mengetahui faktor dominan dari Theory of Planned Behavior yang mempengaruhi green purchase intention serta pengaruh attitude, subjective norm dan perceived behavior control terhadap green purchase intention. Metode penelitian ini adalah kuantitatif deskriptif dengan pengumpulan data menggunakan kuesioner yang disebarkan kepada 200 orang Jabodetabek berusia minimal 18 tahun, serta menggunakan kosmetik organik. Adapun analisis data penelitian ini adalah deskriptif dan SEM PLS menggunakan aplikasi Smartpls 3.0 dan Excel. Hasil yang diperoleh menunjukan bahwa attitude, subjective norm dan perceived behavior control berpengaruh positif signifikan terhadap green purchase intention dan subjective norm merupakan faktor dominan yang mempengaruhi green purchase intention., Business competition is increasingly high that companies must increase their competitiveness from competitors by implementing green products. The high growth and income of the cosmetics industry per year and the increasing number of organic cosmetic brands in circulation make it important to focus on profit but also the planet and people, for example by producing green products. The high growth and income of the cosmetics industry per year and the increasing number of organic cosmetic brands in circulation make it important to know the dominant factors from the Theory of Planned Behavior that influence green purchase intention and the influence of attitude, subjective norms and perceived behavior control on green purchase intention. This research method was descriptive quantitative with data collection used a questionnaire distributed to 200 Jabodetabek people aged at least 18 years, and who used organic cosmetics. The data analysis used SEM PLS and descriptive used the Smartpls 3.0 and Excel applications. The results obtained show that attitude, subjective norms and perceived behavior control had a significant positive effect on green purchase intention and subjective norm was dominant factor influenced green purchase intention
Keyword: Theory of Planned Behavior, green purchase intention, kosmetik organik

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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