Produksi olahan pangan dari buah-buahan selalu menghasilkan limbah kulit dalam pengolahannya. Limbah tersebut hanya dibuang dan dibiarkan menumpuk begitu saja oleh mansyarakat. Apabila tidak ditangani secara cepat akan menghasilkan bau yang tidak sedap sehingga akan mencemari lingkungan. Salah satu alternatif yang dapat dilakukan yaitu dengan cara mengolah limbah tersebut menjadi pupuk organik cair dengan proses fermentasi. Penelitian ini dilakukan untuk mengetahui kandungan hara makro dan kualitas dari pupuk organik cair, mengetahui waktu fermentasi optimum, harga pokok produksi dan BEP dari proses pembuatan pupuk organik cair. Penelitian ini dilakukan dengan cara menambahkan EM4, ragi, dan air gula ke dalam reaktor yang berisi limbah kulit buah yaitu kulit pisang, mangga dan nanas. Proses fermentasi dilakukan selama 34 hari dan dilakukan pengambilan sampel pada hari ke-7, 14, 24 dan 34 untuk dianalisis kandungan hara makro yang terdiri dari C-Organik, P, dan K dengan metode spektrofotometri UV/VIS, SSA dan N dengan metode Kjeldahl. Pada penelitian ini dihasilkan pupuk organik cair yang terbaik yaitu campuran limbah kulit pisang, mangga dan nanas dengan waktu fermentasi 7-14 hari dan kandungan unsur C-Organik, N-total, K2O, dan P2O5 masing-masing sebesar 17,4; 6,05; 2,50 dan 0,15 %. Pupuk organik cair yang dihasilkan sudah memenuhi baku mutu dari Permentan Nomor 261 tahun 2019 kecuali kandungan P2O5, walaupun demikian pupuk organik cair yang diperoleh ini memiliki kualitas yang lebih baik dibanding beberapa pupuk yang sudah dijual secara komersial. Biaya pokok produksi dari pembuatan POC ini sebesar Rp 770.554 dengan Break Event Point (BEP) pada 10 liter.
Penelitian ini bertujuan untuk mengetahui aktivitas dan hasil belajar siswa menggunakan model kooperatif tipe course review horay. Tujuan dari penelitian ini adalah untuk mengetahui efektivitas model pembelajaran kooperatif course review horay pada aktivitas dan hasil belajar matematika siswa. Penelitian ini menggunakan pendekatan kuantitatif bentuk quasy eksperimental design. Populasi dalam penelitian ini merupakan seluruh siswa kelas IV Gugus Bina Budaya Durian Tinggi. Pengambilan sampel menggunakan teknik random sampling dan pengumpulan data berupa lembar observasi aktivitas siswa dan tes hasil belajar siswa. Adapun uji data aktivitas belajar dianalisis menggunakan chi kuadrat dan dari data hasil belajar siswa berdistribusi normal dan homogen menggunakan uji t. Hasil penelitian menunjukkan bahwa terdapat perbedaan aktivitas siswa dan hasil belajar siswa yang diajar dengan menggunakan model course review horay dengan aktivitas dan hasil belajar siswa yang diajar dengan metode konvensional pada pembelajaran matematika kelas IV SD dengan taraf signifikan 0,05. Berdasarkan hasil penelitian ini disimpulkan bahwa model pembelajaran kooperatif tipe course review horay efektif untuk meningkatkan aktivitas dan hasil belajar siswa kelas IV SD.
Learning to rank is a technique in machine learning for ranking problem. This paper aims to investigate this technique to classify the responsible agencies of each complaint text of LAPOR, which is our government complaint management system. Since this categorization problem is multilabel one and the latest work using learning to rank for multilabel classification gave promising result, we work on experiment to compare the typical classification solution with our proposed approaches on this multilabel categorization problem. The experiment results show that LamdaMART, which is listwise approach in learning to rank, is the best algorithm for classifying the primary agency and the secondary agencies for complaint text.
Onggok, solid waste of tapioca still contains high carbohydrate. This component can be converted to liquid sugar (glucose and fructose). Hydrolysis process convert carbohydrate become glucose syrup while isomerization process would change those glucose become fructose syrup. This study aims to produce fructose from Onggok with isomerization by Mg/Al hydrotalcite catalyst and compare the productivity 500ml Onggok substrate (10.32 percent DS) was hydrolyzed become glucose in liquefaction and saccharification process. Liquefaction took placed in 95 degree C, pH 6.5, for 1 hour, by adding 0.067 percent (v/v) α-amylase while the saccharification was start by adding 0.067 percent (v/v) glucoamylase at 60 degree C, pH 5, for 1 hour. Isomerization with Mg/Al hydrotalcite took placed in 50 ml hydrolysate sugar, 1 percent (b/v) catalyst, and 100 degree C while process with glucose isomerase was at 100 ml substrate, 60 degree C, pH 8.2, and same catalyst ratio (1 percent). Isomerization process for each catalyst would be hold in 3, 5, and 7 hours. The best result of isomerization productivity was 39.29 g/L. h for process with Mg/Al hydrotalcite catalyst, while isomerization yield was 6.18 percent for process with glucose isomerization enzyme.
The Information technology development has affected various sectors, including health services. The several technologies have been used to improve health facilities performance. At Johar Baru Health center, central Jakarta, SIKDA (Sisitem Informasi Kesehatan Daerah) Optima application has been applied. Meanwhile, the implementation of SIKDA Optima is not as good as expected. There still many disruptions during the use of this application such a delay service and delivery of report was not in a real time, therefore an evaluation is needed. The purpose of this study was to determine the quality of system, information, and service which is affecting the satisfaction of SIKDA Optima users at Johar Baru Health Center, Central Jakarta. This study used a quantitative approach with observational survey and cross-sectional design. The population in this study was 98 persons and the sample were 79 users of SIKDA Optima, consist of 19 doctors, 22 nurses, 17 midwives, 9 pharmacies, 2 medical recorder and 10 administration staffs. Data analysis was performed using multiple linear regression. The results of multiple linear regression test showed that the user satisfaction of SIKDA Optima = -3.832 + 0.549 (KS) + 0.757 (KI) + 0.359 (KL) with a p-value of KS 0.001<0.05), p-value KI 0,000 <0,05), and the p-value of KL is 0.009 <0.05. The conclusion of this study is the quality of system, information, and services that is used at Johar Baru Health Center have a significant influence on the satisfaction of SIKDA Optima users.
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