The purpose of this study was to utilize waste potato skins (PS) and yam skins (YS) in the production of briquettes with rice waste as a binder. The basic materials used to utilize waste, especially potato skins (PS), yam skins (YS), and rice waste. Experiments were carried out by mixing and molding carbon particles made from an equal mass ratio of PS and YS with rice as binders (i.e., 10, 20, 30, 40, and 50%). PS and YS were dried, carbonized at 250°C for 3 hours, and sieved to get sizes of 250 μm. To make compact briquettes, the molded materials were pressed with 5.66 Pa. Several characterizations were analyzed, including compressed density, relaxed density, relaxation ratio, percentage of moisture content, burning rate, percentage of water resistance index, percentage of durability index, specific fuel consumption, the puncture test, and the hardness test. The characterization results showed that the prepared briquettes have good quality, and the best was for 10% of adhesive. The best durability index was for briquettes with 30% of adhesive. The compressed density and water resistance index were optimum when using 40% of adhesive. In general, briquettes with a low amount of adhesive have a high-density value, low moisture content, and a long flammability. This research is expected to convey information regarding how to reuse rice waste as an adhesive for briquettes.

The use of disposable primary batteries causes environmental pollution due to the lack of battery waste treatment facilities, so it is necessary to handle the problem by making bio-batteries from orange peel and tamarind. The purpose of this study is to know the influence of good electricity on variations of the combination of orange peel and tamarind. The novelty of this study is (1) the use of biomass combination of orange peel and tamarind as bio-battery electrolytes and (2) comparison of orange peel to tamarind. The method used in this study is by experimenting with a mixture of sweet orange peel and tamarind made into pasta and put in a used battery. The results showed that bio-batteries with a variation of 25% orange to tamarind had the highest voltage and the most powerful electric current. This happens because the ion content in the variation is not concentrated so it is easy to move widely. In conclusion, bio-batteries with a mixture of orange peel and acid are the best variation of 25% orange peel against tamarind. The study is expected to reduce the use of chemicals in batteries and reduce disposable battery waste.

Berat badan lahir rendah (BBLR) adalah berat badan lahir kurang dari 2500 gram. Sedangkan hiperbilirubinemia merupakan suatu kondisi yang ditandai dengan peningkatan kadar bilirubin (≥ 10 mg/dl) didalam jaringan ekstravaskuler sehingga tampak kuning pada konjungtiva, kulit dan mukosa. Metode penelitian yang digunakan adalah observasional analitik dengan pendekatan cass control, teknik penentuan sampel yang digunakan adalah purposive sampling yaitu sebanyak 42 sampel yang terbagi atas 21 sampel kasus dan kontrol dengan perbandingan (1:1). Berdasarkan analisis person chi-square merupakan uji yang dilakukan pada penelitian ini, uji ini bertujuan untuk mencari kolerasi antara variabel, dikatakan terdapat kolerasi yang signifikan jika p-value < 0,05. Pada penelitian ini didapatkan p-value = 0,005 yang berarti terdapat kolerasi yang signifikan anatara berat badan lahir rendah dengan kejadian hiperbilirubin. Didapatkan nilai OR = 6,400 yang artinya kejadian hiperbilirubin mempunyai resiko 6,4 kali lebih besar pada bayi BBLR dibandingkan yang tidak BBLR.

<p>In response to the need of qualified teaching English in primary level, successful English teaching has become a crucial and challenging issue. This exploratory case study examines the perspectives of teachers regarding successful English language teaching for young learners. Data of this study was collected from multiple interviews with seven English teachers teaching in five Islamic Integrated Elementary Schools in Bogor that offer English as an additional language (EAL). The findings reveal that the participants of this study had relatively the same understanding or perspectives on teaching English for young learners on eight criteria among the nine criteria of successful English language teaching to young learners. It was also found that five criteria had 100% agreement and were in line with the theories of successful teaching English to young learners. There was one criterion that had 57% inlined result. There were three inlined criteria which were relatively the same amount with 86%. Therefore, the other criterion was not in accordance with the seven respondents with 0% agreement.</p>

Konsep relasi dan fungsi pada kurikulum matematika sekolah cukup esensial. Dalam evaluasi tentang pemahaman siswa dalam materi dalam materi konsep relasi dan fungsi, terdapat beberapa kesalahan yang dilakukan oleh siswa. Kesalahan yang terjadi dapat berupa kesalahan fakta, kesalahan konsep, kesalahan prinsip, kesalahan prosedur dan kesalahan cara penyimpulan. Penelitian ini bertujuan untuk mendeskripsikan jenis-jenis kesalahan dalam menyelesaikan soal materi relasi dan fungsi yang dilakukan siswa kelas VIII MTs Miftahul Ulum Tunggak Cerme. Jenis penelitian ini adalah penelitian deskriptif-kualitatif, dengan tes diagnostik dan wawancara sebagai instrumen pengumpulan data. Sumber data dalam penelitian ini adalah siswa kelas VIIIB MTs Miftahul Ulum Tunggak Cerme yang berjumlah 25 orang siswa. Teknik pengumpula sampel digunakan untuk menetapkan 3 orang siswa yang masing-masing mewakili kategori kemampuan tinggi, sedang, dan rendah sebagai subjek penelitian. Hasil Penelitian menunjukkan bahwa siswa banyak melakukan fakta, konsep, prosedur dan cara penyimpulan.Kata kunci : Analisis, Kesalahan siswa, Relasi dan Fungsi