Judul: Clarification of Coconut Syrup with the Addition of Milk as a Binding Agent of Insoluble Materials
Abstrak: Produk sirup kelapa yang diproduksi oleh Koperasi W didistribusikan dan diekspor hingga ke luar negeri. Salah satu tantangan yang dihadapi pabrik adalah adanya endapan pada produk setelah penyimpanan. Upaya yang telah dilakukan yaitu menggunakan penyaring vakum dalam proses penyaringan, namun belum dapat menghasilkan sirup kelapa tanpa endapan. Proyek ini bertujuan mencegah terbentuknya endapan pada sirup kelapa selama penyimpanan produk setelah dikemas. Penghilangan endapan dilakukan menggunakan metode koagulasi-flokulasi dengan menambahkan koagulan berupa susu steril atau murni pada proses pemasakan nira, sehingga mempermudah proses penyaringan bahan yang tidak larut dalam nira kelapa. Penambahan susu 0,4% (v/v) pada pemasakan pertama nira tidak menghasilkan endapan, memiliki tingkat kesukaan panelis yang lebih tinggi pada uji organoleptik serta memiliki tingkat kekentalan dan proksimat yang tidak jauh berbeda dengan produk yang dihasilkan oleh pabrik. Kata kunci: endapan, koagulan, sirup kelapa, Coconut syrup products produced by the W Cooperative are distributed and exported overseas. One of the challenges facing factories is the presence of deposits on the product after storage. Efforts have been made, namely using a vacuum filter in the filtering process, but have not been able to produce coconut syrup without sediment. This project aims to prevent the formation of deposits in coconut syrup during product storage after packaging. The removal of precipitates is carried out using the coagulation-flocculation method by adding a coagulant in the form of sterile or pure milk in the sap cooking process, thus facilitating the process of filtering materials that are not soluble in coconut sap. The addition of 0.4% (v/v) milk in the first cooking of the sap did not produce a precipitate, had a higher level of preference by the panelists in the organoleptic test and had a viscosity and proximate level that was not much different from the product produced by the factory. Keywords: sediment, coagulant, coconut syrup
Keyword: sediment, coagulant, coconut syrup

Judul: Strategy and Business Development Model for Coconut Liquid Sugar (Syrup) Products at Koperasi W Purworejo
Abstrak: Produk gula cair (sirup) kelapa memiliki peluang ekspor dan pasar dalam negeri yang baik. Produk sirup kelapa lebih praktis digunakan dan lebih sehat karena dibuat secara organik. Produk gula cair hasil produksi dari Koperasi W masih memiliki kekurangan, karena adanya endapan pada produk gula cair (sirup) kelapa setelah penyimpanan beberapa hari. Perbaikan proses telah berhasil dilakukan, sehingga prospek pasar dalam negeri dan pasar ekspor cukup besar, namun perlu perbaikan-perbaikan sebagai upaya pengembangan model bisnis yang berkelanjutan dengan memperhatikan faktor lingkungan. Tujuan penelitian ini adalah mengidentifikasi faktor internal dan eksternal lingkungan bisnis menggunakan matriks evaluasi faktor internal dan eksternal (IFE dan EFE), merumuskan strategi alternatif menggunakan matriks SWOT (Strength, Weakness, Opportunity, Threats), mengambil keputusan strategi yang dijalankan melalui penilaian Quanititative Strategic Planning Matrix (QSPM), dan merencanakan model bisnis berkelanjutan dengan menggunakan pendekatan Business Model Canvas (BMC). Hasil prioritas utama dari penilaian QSPM berdasarkan nilai Total Attractive Score (TAS) yang diperoleh sebesar 6,111. Koperasi W memiliki kekuatan utama yaitu keaslian dan kualitas yang baik, kelemahan utama yaitu teknologi dan pemeliharaan sumber daya alam masih rendah, peluang untuk memanfaatkan pasar untuk penjualan di luar negeri, dan ancaman utama dengan adanya keterbatasan pengetahuan teknologi untuk pemasaran. Alternatif strategi yang terpilih yaitu memanfaatkan peluang pasar dengan meningkatkan kapasitas produksi, menciptakan produk yang berkualitas dan asli melalui pengoptimalan sumber daya alam, kelimpahan bahan baku dan sumber daya manusia., Coconut liquid sugar (syrup) products have good export and domestic market opportunities. Coconut syrup products are more practical to use and healthier because they are made organically. Liquid sugar products produced by Koperasi W still have a weakness, due to the deposition of liquid sugar (syrup) coconut after several days of storage. Process improvements have been successfully carried out, so that the prospects for the domestic market and export market are quite large, but improvements are needed as an effort to develop a sustainable business model by taking into account environmental factors. The purpose of this study is to identify internal and external factors of the business environment using an evaluation matrix of internal and external factors (IFE and EFE), formulate alternative strategies using a SWOT matrix (Strength, Weakness, Opportunity, Threats), make strategic decisions that are carried out through an assessment of Quanititative Strategic Planning Matrix (QSPM), and plan a sustainable business model using the Business Model Canvas (BMC) approach. The main priority result of the QSPM assessment based on the Total Attractive Score (TAS) score obtained is 6.111. Koperasi W has main strengths, namely authenticity and good quality, the main weakness is technology and maintenance of natural resources is still low, opportunities to take advantage of markets for overseas market, and the main threat is the limited knowledge of technology for marketing. The chosen alternative strategy is to take advantage of market opportunities by increasing production capacity, creating quality and original products through optimizing natural resources, abundance of raw materials and human resources.
Keyword: Gula cair, strategi pengembangan, quantitative strategic planning matrix, liquid sugar, Development strategy, quantitative strategic planning matrix

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
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