Judul: Relationship Analysis of Fish Farmer Profile with Catfish Farming Productivity at PT. Ikan Bangun Indonesia (IWAKE) Bogor
Abstrak: Permintaan ikan lele yang terus meningkat di Indonesia mendorong pembudidaya untuk meningkatkan produksinya. IWAKE merupakan salah satu perusahaan rintisan akuakultur yang memiliki tingkat kelangsungan hidup rata-rata ikan lele hanya 67% dan produktivitas budidaya rata-rata hanya 6,53 kg/m2 pada awal tahun 2022. Hal ini menjadi masalah karena dapat mengakibatkan kerugian pada ketiga pihak. Penelitian ini bertujuan mendeskripsikan profil pembudidaya yang mencakup karakteristik, sistem kompensasi, kinerja produksi, dan menghitung produktivitas pembudidaya, serta menganalisis hubungan profil pembudidaya dengan produktivitas. Jenis penelitian yaitu non eksperimental dengan metode studi kasus. Data profil pembudidaya, karakteristik pembudidaya, sistem kompensasi, dan kinerja produksi yang digunakan sebagai variabel bebas dianalisis secara statistik dan deskriptif. Hasil analisis menunjukkan bahwa semua variabel memiliki hubungan dan berpengaruh terhadap produktivitas budidaya ikan lele kecuali profil dan karakteristik pembudidaya., The increasing demand for catfish in Indonesia encourages fish farmers to increase their production. IWAKE is an aquaculture startup that has an average survival rate of catfish of only 67% and aquaculture productivity of only 6.53 kg/m2 in early 2022. This is a problem for the company. This study aims to describe the fish farmer profiles i.e. attitudes, compensation systems, production performance, and calculate the fish farmers productivity, as well as analyze the relationship between fish farmer profiles with farm productivity. The type of research is non-experimental with the case study method. The data of fish farmer profiles and attitudes, compensation systems, and production performance used as independent variables were analyzed statistically and descriptively. The results of the analysis show that all variables have a relationship and affect on catfish farming productivity except fish farmer profile and attitude.
Keyword: attitude, characteristics, production performance, profit sharing

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: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
Keyword: