Judul: Evaluation of Drip Irrigation Hydroponic System for Cultivation of Purwoceng Plants in A Highland Greenhouse
Abstrak: Populasi purwoceng pada saat ini terbatas di Dataran Tinggi Dieng dan populasinya kian langka. Budidaya tanaman purwoceng di lahan terbuka menghadapi risiko embun beku. Pada penelitian ini, budidaya tanaman purwoceng dilakukan secara hidroponik di dalam greenhouse. Tujuan penelitian ini adalah melakukan analisis statistik dan evaluasi terhadap data sampel tanaman purwoceng yang dibudidayakan menggunakan sistem hidroponik irigasi tetes, untuk mendapatkan sistem hidroponik terbaik pada budidaya tanaman purwoceng. Penelitian menggunakan Rancangan Acak Lengkap (RAL) dengan 2 perlakuan dan 4 kali ulangan. Perlakuan pertama adalah jenis sistem hidroponik irigasi tetes yang meliputi dua taraf yaitu secara non-resirkulasi dan resirkulasi. Perlakuan kedua adalah kepekatan larutan nutrisi yang terdiri dari tiga taraf yaitu 2000 ppm, 1500 ppm, dan 1000 ppm. Hasil penelitian menunjukkan perlakuan irigasi tetes non- resirkulasi dan kepekatan larutan nutrisi 1000 ppm dan 1500 ppm menghasilkan kadar fenolik dan flavonoid akar dan daun tertinggi. Sistem irigasi tetes non- resirkulasi memungkinkan tanaman purwoceng tumbuh lebih baik dibandingkan sistem irigasi tetes resirkulasi. Hal ini dibuktikan dengan rata-rata jumlah daun dan jumlah cabang tertinggi ada pada sistem irigasi tetes non-resirkulasi dengan kepekatan larutan nutrisi 1000 ppm dan 1500 ppm., The population of purwoceng is currently limited to the Dieng Plateau and the population is increasingly scarce. Purwoceng cultivation in open fields faces the risk of frost. In this study, purwoceng cultivation was carried out hydroponically in a greenhouse. The purpose of this study was to perform statistical analysis and evaluation to sample data of purwoceng plants cultivated using drip irrigation hydroponic systems, to obtain the best hydroponic system for purwoceng cultivation. The study used a completely randomized design (CRD) with 2 treatments and 4 replications. The first treatment was a type of drip irrigation hydroponic system which included non-recirculating and recirculation. The second treatment was the concentration of the nutrient solution which included 2000 ppm, 1500 ppm, and 1000 ppm. The results showed that non-recirculating drip irrigation and nutrient solution concentrations of 1000 ppm and 1500 ppm resulted the highest phenolic and flavonoid levels in roots and leaves. The non-recirculating drip irrigation system allows purwoceng plants to grow better than the recirculating drip irrigation system. This was indicated by the average number of leaves and the highest number of branches in the non-recirculating drip irrigation system with nutrient solution concentrations of 1000 ppm and 1500 ppm.
Keyword: purwoceng, greenhouse, hydroponic system, drip irrigation

Judul: Performance of Monitoring System for Moisture Content of Planting Media in Hydroponic Purowceng Cultivation
Abstrak: Budidaya tanaman purwoceng secara hidroponik dilakukan di Plant Factory IPB University, Leuwikopo, Dramaga. Sistem hidroponik yang digunakan adalah sistem hidroponik substrat dengan media tanam campuran arang sekam dan cocopeat menunjukkan pertumbuhan terbaik. Salah satu parameter yang perlu diperhatikan pada budidaya tanaman secara hidroponik tersebut adalah kadar air media tanam. Penelitian ini bertujuan menguji sistem monitoring kadar air media tanam berbasis LoRa pada berbagai campuran arang sekam dan cocopeat untuk budidaya tanaman secara hidroponik. Perbandingan campuran arang sekam dan cocopeat yang digunakan untuk pengujian adalah 3:1, 2:1, dan 1:1. Tahapan penelitian yang dilakukan meliputi penjenuhan media tanam, kalibrasi sistem monitoring, pengukuran sifat fisik, dan pengukuran kadar air menggunakan menggunakan sistem monitoring berbasis LoRa yang dikembangkan oleh tim riset purwoceng IPB dan metode gravimetri. Pengukuran sifat fisik porositas media tanam arang sekam dan cocopeat memiliki hasil yang berbanding terbalik dengan bulk density. Nilai regresi bulk density berpengaruh sebesar R2 0,8945 terhadap kadar air media tanam. Hasil pengukuran kadar air menggunakan sistem monitoring berbasis LoRa dan metode gravimetri memiliki nilai yang signifikan melalui uji ANOVA. Tingkat akurasi sistem monitoring sangat baik sebagaimana ditunjukkan oleh perbandingan terhadap metode gravimetri menggunakan uji regresi linier yang mendapatkan nilai R 2 sebesar 0,5125 dan nilai MAPE sebesar 7,06%., The hydroponic cultivation of purwoceng plants was carried out at the Leuwikopo Plant Factory of IPB Univeristy, Leuwikopo, Dramaga. The hydroponic system used was a substrate hydroponic system with a mixture of husk charcoal and cocopeat growing media. This study aims to test the water content monitoring system of LoRa-based growing media on various mixtures of husk charcoal and cocopeat for cultivation of plants. The ration of the mixture of husk charcoal and cocopeat used for the test was 3:1, 2:1, and 1:1. The stages of the research carried out included saturation of planting media, calibration of system monitoring, measurement of physical properties, measuring water content using measuring instruments that were part of the monitoring system developed by the purwoceng cultivation team in Leuwikopo IPB and the gravimetri method. Measurement of the porosity of husk charcoal and cocopeat growing media had result that were inversely proportional to the bulk density. The regression value of bulk density has an effect of R2 0,08945 on the water content of the grtowing media. The results of measuring water content using a LoRa-based monitoring system and the gravimetric method have a significant value through the ANOVA test. The level of accuracy of the monitoring system is very good as shown by the comparison to gravimetri method using linear regression tets which gets an R2 value of 0,5125 and a MAPE value of 7,06%.
Keyword: LoRa based monitoring system, water content, planting media, gravimetri method

Judul: Konstruksi Hukum Grup Kurva Eliptik Atas F3m
Abstrak: Elliptic curves upon F3m can be divided in two cases, i.e. supersingular and nonsupersingular case. Based on group laws on elliptic curves, a new arithmetic upon F3m can be formulated as an addition process of two random points on the curve. This addition process can then be applied to the ElGamal algorithm.
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