Judul: Determinants of Marketing Institution Choice By Cassava Farmers in Canal Nunyai District Central Lampung Regency
Abstrak: Subsektor tanaman pangan menjadi salah satu bagian dari sektor pertanian yang memegang perananan penting bagi ketahanan pangan dalam negeri. Tiap petani ubi kayu di lampung tengah memiliki alternatif penjualan yang bisa dipilih diantaranya dijual ke pedagang pengumpul dan dijual ke pabrik secara langsung. Petani hanya sebatas price taker karena tidak memiliki power dalam posisi tawar-menawar. Kecenderungan kondisi pasar yang terbentuk adalah oligopsony. Penelitian ini bertujuan untuk menganalisis faktor-faktor yang memengaruhi keputusan petani ubi kayu di Lampung Tengah dalam memilih saluran pemasaran.. Responden pada penelitian ini sebanyak 52 orang melalui metode nonprobability sampling dengan teknik snawball sampling. Metode analisis yang digunakan yaitu analisis deskriptif dan regresi logistik. Determinan pilihan lembaga pemasaran oleh petani ubi kayu di Kecamatan Terusan Nunyai di Kabupaten Lampung Tengah adalah rafaksi, jarak, dan biaya angkut. Jarak dengan nilai odds ratio tertinggi mempengaruhi pilihan lembaga pemasaran dibandingkan dengan beberapa variabel lainnya Kata Kunci : petani ubi kayu, lembaga pemasaran, regresi logistik, The food crop subsector is a part of the agricultural sector that plays an important role in domestic food security. Every cassava farmer in Central Lampung has sales alternatives to choose from, including selling to collectors and selling directly to factories. Farmers are only price takers because they do not have the power to bargain. The tendency for market conditions to be formed is oligopsony. This research aims to analyze the factors that influence the decisions of cassava farmers in Central Lampung in choosing marketing channels. Respondents in this study were 52 people using a non-probability sampling method with a snawball sampling technique. The analytical methods used are descriptive analysis and logistic regression. The determinants of the choice of marketing institution by cassava farmers in the Luluan Nunyai District in Central Lampung Regency are fraction, distance, transportation costs, and main work. The distance with the highest odds ratio value influences the choice of marketing institution compared to several other variables. Keywords: cassava farmers, marketing institutions, logistic regression
Keyword: cassava farmers, marketing institutions, logistic regression

Judul: Analysis of Cassava Farming Income in Central Lampung Regency
Abstrak: Petani ubi kayu di Terusan Nunyai memiliki dua pilihan saluran pemasaran ubi kayu, yaitu langsung ke pabrik tapioca atau melalui pedagang pengumpul. Kedua saluran ini berbeda dalam harga, rafaksi, dan layanan, yang menyebabkan variasi pendapatan dan margin pemasaran. Penelitian ini bertujuan menganalisis perbedaan pendapatan dan menghitung margin pemasaran pada kedua saluran. Sampel terdiri dari 52 responden: 4 pedagang pengumpul, 28 petani di saluran satu, dan 20 petani di saluran dua. Data primer dianalisis menggunakan metode deskriptif kualitatif, analisis biaya dan pendapatan, R/C ratio, uji t independen, dan margin pemasaran. Hasil penelitian menunjukkan tidak ada perbedaan signifikan pada pendapatan bersih, penghasilan bersih, R/C biaya tunai, dan R/C biaya total antara kedua saluran. Namun, ada perbedaan signifikan pada penerimaan dan biaya total. Tidak terdapat margin pemasaran pada saluran satu, sedangkan margin pada saluran dua sebesar Rp218,60 per kg., In Terusan Nunyai, cassava farmers can sell their harvest directly to tapioca factories or through intermediary traders. These two channels differ in prices, rafaction, and services, leading to variations in income and marketing margins. This study aims to analyze differences in income and to calculate marketing margins of the two channels. The sample consisted of 52 respondents: 4 intermediary traders, 28 farmers in first channel, and 20 farmers in second channel. Primary data were analyzed using descriptive qualitative methods, cost and income analysis, R/C ratio, independent t-test, and marketing margin. The results showed no significant differences in net revenue, net income, R/C of cash costs, and R/C of total costs between the two channels. However, there were significant differences in revenue and total costs. There is no marketing margin in channel one, while the margin in channel two is IDR 218.60 per kg.
Keyword: cassava, channels, income, margin, marketing

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology