Judul: Assessment of Compliance with Indonesian Ecolabeling Regulations: Case Study in Beverage Products with Semi-Rigid Plastic Packaging
Abstrak: Indonesia is one of the world’s leading producers of plastic trash and plastic marine pollution. It is estimated that beverage product contributed 971,000 metric tonnes of plastic with just a small percentage of it being recycled. Companies play an important role in introducing an environmentally friendly product to the market. To provide the consumer confidence that the environmentally product is correctly implemented, the Ministry of Forestry and Environment enacted the Ministry of Forestry and Environment Law Number 2 of 2014 about ecolabel. This study attempts to examine and evaluate the compliance of beverage companies in Indonesia with relation to the addition of the ecolabelling logo on the packaging. To achieve this, this study used a survey of several food industry practitioner from beverage companies, as well as field observation of the product. The result shows that although the food industry practitioner is aware and knowledgeable about ecolabel, the implementation is still concerningly low, with only 1 product with compliant ecolabel amongst 109 products. The cause of the low implementation could be due to its difficulty in terms of requirements, cost and supporting policies that enforces or encourage the industry to comply it. Therefore, additional research and discussions between stakeholders must be conducted to assess the challenges and overcome this issue.
Keyword: Ecolabel regulation, Beverage Industry, Plastic Waste, Plastic Packaging, Ecolabe

Judul: Economic Benefits Estimation Green Consumer Behavior Implementation for Plastic Packaged Product (Case Study: Tangerang Selatan City, Banten Province)
Abstrak: Perubahan pola konsumsi masyarakat menyebabkan pertambahan jumlah sampah, khususnya sampah plastik. Salah satu jenis sampah plastik yaitu sampah plastik perawatan tubuh berupa botol sabun mandi plastik HDPE. Masyarakat didorong untuk merubah perilaku ke arah green consumer behavior dengan cara beralih ke produk ramah lingkungan. Penelitian ini bertujuan untuk (1) menganalisis persepsi masyarakat dalam penerapan green consumer behavior, (2) menganalisis perilaku masyarakat dalam menerapkan green consumer behavior, (3) menganalisis faktor yang mempengaruhi masyarakat dalam menerapkan green consumer behavior, dan (4) mengestimasi manfaat ekonomi dari penerapan green consumer behavior. Metode yang digunakan untuk menganalisis yaitu analisis deskriptif, conjoint analysis, analisis perubahan biaya, dan benefit transfer. Hasil penelitian menunjukkan bahwa responden tertarik menerapkan green consumer behavior untuk menjaga kelestarian lingkungan serta berkontribusi dalam mengurangi pengeluaran sehari-hari. Faktor yang paling mempengaruhi hal tersebut yaitu ukuran kemasan produk. Penerapan tersebut dapat menghemat pengeluaran sehari-hari sebesar Rp143.160 per tahun, serta menghemat biaya akibat dampak lingkungan sebesar Rp182.403 per 100 pengguna per tahun., Changes in people's consumption patterns would increase the amount of waste, especially plastic waste. One type of plastic waste is body care plastic packaging in the form of HDPE plastic soap bottles. People are encouraged to change their behavior towards green consumer behavior. This study aims to (1) analyze public perceptions in the application of green consumer behavior, (2) analyze public behavior in applying green consumer behavior, (3) analyze factors that influence people to move towards green consumer behavior, and (4) estimate the economic benefits of implementing green consumer behavior. This study employ descriptive analysis, conjoint analysis, cost analysis, and benefit transfer. Based on the result respondents were interested in implementing green consumer behavior to preserve the environment and to reduce daily expenses. The most influencing factor in green consumer behavior application is the size of the packaging. The application can save daily expenses up to IDR 143,160 per year, and environmental costs up IDR 182,403 per 100 users per year.
Keyword: community behavior, economic benefits, green consumer behavior, HDPE plastic, plastic waste

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
Keyword: