Judul: Analisis Penggunaan Semi-Automatic Feeder terhadap Kinerja Usaha Budidaya Ikan Lele (Clarias sp.) di CV Vatra Mandiri Agro, Depok
Abstrak: Tren peningkatan produksi ikan lele diiringi dengan peningkatan kebutuhan dan harga pakan. Hal ini akan berakibat pada tingginya biaya produksi ikan lele. Salah satu solusi penghematan dapat dilakukan dengan penekanan biaya tenaga kerja dengan penggunaan semi-automatic feeder. Penelitian ini bertujuan menganalisis produktivitas tenaga kerja pada metode pemberian pakan dengan penggunaan semi-automatic feeder dan manual feeding dalam usaha pembesaran ikan lele. Perlakuan pada penelitian ini, yaitu kolam dengan manual feeding (A) dan kolam dengan semi-automatic feeder (B), masing-masing dengan 3 ulangan. Ikan lele dengan bobot 3,4 ± 0,82 g dan panjang 7,8 ± 0,65 cm dipelihara dalam kolam berukuran 8 m x 12 m x 0,65 m dengan padat tebar 481 ekor/m3. Selama 83 hari pemeliharaan, ikan diberi pakan tiga kali sehari. Mesin feeder menyemprotkan pakan dengan kecepatan 16 g/detik. Data pertumbuhan diambil sebanyak lima kali dalam 83 hari masa pembesaran. Hasil penelitian menunjukkan bahwa parameter tingkat kelangsungan hidup (TKH), laju pertumbuhan mutlak panjang (LPMP), dan laju pertumbuhan mutlak bobot (LPMB) berpengaruh nyata, sedangkan jumlah konsumsi pakan (JKP), rasio konversi pakan (RKP), dan total panen tidak menunjukkan perbedaan pada budidaya ikan lele. Berdasarkan indikator produktivitas tenaga kerja menunjukkan usaha pembesaran ikan lele dengan semiautomatic feeder memiliki produktivitas yang lebih tinggi yang lebih tinggi., The increasing trend in catfish production aligns with an increase in feed demand and price. This contributes to the higher overall production cost. One cost- saving solution is by suppressing the labour cost through the use of semi-automatic feeder. This research aims to analyse labour productivity in the method of feeding using semi-automatic feeders and manual feeding in the catfish farming business. The treatments in this research were ponds with manual feeding (A) and ponds with semi-automatic feeders (B), each with 3 replicates. Catfish at initial weight of 3.4 ± 0.82 g and a length of 7.8 ± 0.65 cm were reared in ponds measuring 8 m x 12 m x 0.65 m with a stocking density of 481 fish/m3. During the 83 days of cultivation, the fish were fed three times a day. The automatic feeder dispensed feed at a rate of 16 g/second. Growth data were collected five times during the 83-day growth period. The research results show that survival rate (TKH), absolute growth rate in length (LPMP), and absolute growth rate in weight (LPMB) had a significant effect, while feed consumption (JKP), feed conversion ratio (RKP), and total harvest did not show any differences in catfish farming. Based on labor productivity parameters, catfish farming with semi-automatic feeders showed higher productivity.
Keyword: business, catfish, culture, semi-automatic feeder

Judul: Performance of Production and Bussiness on Catfish (Clarias sp.) Grow-out in Different Container Forms at Trio Raja Mandiri Farm, Bogor
Abstrak: Ikan lele banyak digemari masyarakat karena harga terjangkau dan memiliki kandungan protein yang tinggi. Permintaan pasar terhadap ikan lele terus meningkat sehingga memacu pembudidaya ikan lele guna memenuhi permintaan pasar tersebut. Bentuk wadah yang banyak digunakan dalam budidaya ikan lele, yaitu bulat dan persegi. Penggunaan wadah terpal dengan bentuk bulat dan persegi memiliki kelebihan dan kekurangannya masing-masing. Hasil budidaya nantinya akan mempengaruhi produktivitas dan nilai keuntungan yang didapatkan. Penelitian ini bertujuan menganalisis kinerja produksi dan kinerja usaha pembesaran ikan lele pada bentuk wadah yang berbeda, yaitu bulat dan persegi panjang. Penelitian ini menggunakan metode studi kasus dengan melakukan pengamatan data secara langsung selama budidaya, wawancara, serta pengumpulan data yang berkaitan dengan usaha budidaya. Hasil penelitian menunjukkan bahwa kinerja produksi pada pembesaran ikan lele menghasilkan produktivitas rata-rata pada wadah bulat sebesar 19,76±1,35 kg/m2 dan pada pada wadah persegi panjang sebesar 9,57±1,85 kg/m2. Kinerja usaha yang didapatkan pada wadah A dengan nilai payback period (PP) 0,73 tahun dan revenue cost ratio (R/C) 1,35, untuk wadah B didapatkan nilai PP 1,45 tahun dan R/C 1,12. Kinerja produksi dan kinerja usaha pembesaran ikan lele dengan penggunaan wadah bulat didapatkan nilai lebih tinggi daripada wadah persegi panjang., Catfish is highly favored by the community due to its affordable price and high protein content. The market demand for catfish continues to increase, driving catfish farmers to meet the market demand. The commonly used forms of containers in catfish farming are round and rectangular. The use of tarpaulin containers in round and square shapes has their respective advantages and disadvantages. The cultivation results will ultimately affect the productivity and profitability. This research aims to analyze the production performance and business performance of catfish farming in different container shapes, namely round and rectangular. This study employs a case study method, which involves observation, interviews, and direct participation in the activities to collect data. The research findings indicate that the production performance of catfish farming yields an average productivity of 19,76±1,35 kg/m2 in round containers and an average productivity of 9,57±1,85 kg/m2 in rectangular containers. The business performance obtained in container A shows a PP (payback period) value of 0,73 years and an R/C (return on capital) ratio of 1,35, while in container B, the PP value is 1,45 years and the R/C ratio is 1,12. The production performance and business performance in catfish farming using round containers yield higher values compared to rectangular containers.
Keyword: catfish, business performance, production performance, round container, square container

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