Judul: Performance Test of Peanut Cutting Machine
Abstrak: Penelitian diawali dari permasalahan pada salah satu proses pembuatan peyek yaitu proses pemotongan kacang tanah. Proses pemotongan kacang tanah dilakukan secara manual sehingga memerlukan waktu yang lama. Mesin pemotong kacang tanah dirancang untuk menjadi solusi dari permasalahan proses pemotongan kacang tanah yang dibuat saat pelaksanaan PKM 2021. Selanjutnya dilakukan uji kinerja yang bertujuan untuk mengetahui kinerja mesin yang telah dirancang sehingga dapat diketahui prospek kelayakan penerapannya serta dapat menjadi acuan dalam pengembangan selanjutnya. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Hasil penelitian menunjukkan bahwa tingkat keberhasilan tertinggi terdapat pada proses pemotongan secara manual yaitu sebesar 93,3% sedangkan untuk proses pemotongan menggunakan mesin memiliki tingkat keberhasilan 73%. Namun untuk waktu tercepat terdapat pada proses pemotongan menggunakan mesin dengan lama waktu 13 menit 54 detik dan waktu proses pemotongan secara manual memerlukan waktu 2 jam 19 menit untuk 1 kg kacang tanah dengan tingkat kadar air 8%. Kata kunci: mesin, kacang tanah, pemotongan, waktu., The research started from a problem in one part of the process of making a peyek, namely the process of cutting peanuts. The process of cutting peanuts is done manually so it takes a long time. This peanut cutting machine was designed to be a solution to the problem of the cutting process and the machine was designed during PKM 2021. This research was carried out with aim to evaluate the performance of the designed machine, in order to determine the feasibility of the application and reference in further development. The method that has been used in this research are descriptive. The results showed that the highest success rate was found in the manual cutting process, which was 93.3%, while the machine-cutting process had an success rate of 73%. However, the fastest time was found in the cutting process using a machine with a length of 13 minutes 54 seconds and the manual cutting process takes 2 hours 19 minutes for 1 kg of peanuts with a moisture content of 8%. Keywords: cutting, machine, peanut, time.
Keyword: Mesin, Kacang Tanah, Pemotong, Pemotongan, CircleNut

Judul: Response of Peanut Yield (Arachis hypogaea L.) Pelanduk Variety on Treatment of Type and Time Pruning
Abstrak: Kacang tanah (Arachis hypogaea L.) merupakan tanaman legum yang banyak dibudidayakan di Indonesia dan memiliki peran strategis pangan Nasional sebagai sumber protein dan minyak nabati. Peningkatan produktivitas kacang tanah banyak dilakukan dengan berbagai teknik budidaya yang relevan, yang ditujukan untuk meningkatkan produksi hasil panen. Penelitian ini bertujuan melihat respon dan pengaruh dari beberapa jenis pangkas dan waktu pangkas dalam meningkatkan produksi hasil kacang tanah. Penelitian dilaksanakan di KP Leuwikopo IPB Dramaga, Bogor pada bulan November 2020 sampai Februari 2021. Percobaan menggunakan rancangan petak terbagi (split-plot) dengan perlakuan terdiri dari dua faktor, yaitu jenis pangkas sebagai petak utama dan waktu pangkas sebagai anak petak. Hasil penelitian menunjukan bahwa perlakuan jenis pangkas dapat menurunkan rata-rata jumlah bunga yang tumbuh pada fase generatif tanaman. Waktu pangkas dapat meningkatkan daya hasil pada produktivitas tanaman, bobot polong kering per petak dan bobot 100 biji. Hal tersebut ditujukan dengan peningkatan produktivitas sebesar 2,12 ton ha-1 polong kering, 509,51 g bobot polong kering per petak dan 51,03 g 100 biji. Pemangkasan batang utama pada waktu 8 MST rata-rata dapat meningkatkan produksi hasil tanaman dimana efektivitas hasil fotosintat yang diterima oleh tanaman dapat berfokus dalam pengisian polong dan biji tanaman sehingga komponen hasil tanaman dapat meningkat secara signifikan., Peanut (Arachis hypogaea L.) is a legume that is widely cultivated in Indonesia and has a strategic role in national food as a source of protein and vegetable oil. Increasing the productivity of peanuts is mostly done by various relevant cultivation techniques, which are aimed at increasing crop yields. This study aims to examine the response and influence of several types of pruning and pruning time in increasing peanut yields. The study was carried out at KP Leuwikopo IPB Dramaga, Bogor from November 2020 to February 2021. The experiment used a split-plot design with a treatment consisting of two factors, namely the type of pruning as the main plot and the time of pruning as a subplot. The results showed that the type of pruning treatment can reduce the average number of flowers that grow in the generative phase of the plant. Pruning time can increase yield on plant productivity, dry pod weight per plot and weight of 100 seeds. This was indicated by an increase in productivity of 2.12 tons ha-1 dry pods, 509.51 g dry pod weight per plot and 51.03 g 100 seeds. Pruning the main stem at 8 WAP on average can increase crop yields where the effectiveness of photosynthate yields received by plants can focus on filling the pods and seeds of plants so that the yield component of the plant can increase significantly.
Keyword: Arachis hypogaea, Batang utama, Pemangkasan, Produktivitas, Respon

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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