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Homogenization atau homogenisasi adalah proses penyeragaman ukuran partikel dalam upaya mempertahankan kestabilan dari sebuah campuran yang terbentuk dari dua fase yang tidak dapat menyatu atau biasa disebut emulsi. Maka dari itu salah satu teknologi yang bisa digunakan untuk memperkecil ukuran partikel salah satunya yaitu mesin homogenizer. Mesin homogenizer juga dapat digunakan untuk mengecilkan suatu bahan tanpa dicampurkan dengan bahan lainnya. Faktor yang digunakan untuk melihat ukuran partikel adalah kecepatan putar rotor, waktu kerja mesin dan tekanan. Bahan yang digunakan adalah selulosa, arang kelapa dan Nata de Coco. Setelah dilakukan proses homogenisasi menggunakan mesin homogenizer rata-rata ukuran partikel yang didapat akan dilihat menggunakan mikroskop stereo. Hasil penelitian dianalisis dengan menggunakan metode Taguchi Orthogonal Array Design L9 (33) dengan tipe smaller is better sebagai karakteristik respon SN Ratio sehingga hanya 9 percobaan saja yang dilakukan. Nilai ukuran yang paling kecil didapatkan pada kecepatan putar rotor 3000 rpm, waktu kerja mesin 90 menit, dan bukaan katup setengah terbuka dengan ukuran masing-masing spesimen yaitu 0,4 µm pada selulosa, 0,34 µm pada arang kelapa dan 0,51 µm pada Nata de Coco. Berdasarkan Analysis of Variance (ANOVA) faktor yang berpengaruh terhadap ukuran masing-masing spesimen hanyalah kecepatan putar rotor.

National audience

Nickel Oxide (NiO) have widely applied in industrial and automotive to forming oxide layer on the substrate due to it have high thermal stability and corrosion resistant. However, NiO was not directly diffused to the substrate via co-precipitation, spray-pyrolysis and sol-gel methods. Therefore, NiO-electroplating was performed in coating FeCrAl substrate by γ-Al2O3 powder. This method was conducted using various time of 15, 30, 45, 60 and 75 minutes, a current of DC power supply is 1.28A and sulphamate type solution. From the data shows that smallest surface roughness (Ra) of NiO-electroplating (EL) samples located at EL 30 min sample for 0.69 µm. Ra of raw material was lower than coated samples due to it performed by coating activity on the substrate. It supported by coating thickness analysis that treated samples has a higher coating thickness up to 11.3 µm. EDS analysis observed some elements on coated and uncoated samples such as Carbon (C) of 4.62-20.67%, Oxygen (O) of 6.16-19.62%, Nickel (Ni) of 6.76-25.14%, Iron (Fe) of 23.96-48.53%, Sodium (Na) of 2.21-9.95%, Chromium (Cr) of 7.97-15.59% and Aluminum (Al) of 2.17-3.12%. Those elements promote to develop a protective oxide layer on FeCrAl at a high temperature of 1000 0C.

Drugs are often associated with intoxicants. In the context of fiqih drugs usually dikiaskan to prohibition of wine. However, in line with the development of contemporary medical science, the works of the new fiqh also mention and emphasize that the effects of damage also have its own influence in relation to drug law. This study aims to explore and analyze the trends of contemporary jurisprudence works in explaining their backs in relating the status of Sharia law values to drug abuse. This study uses qualitative methods. The data obtained from these works were analyzed and made comparisons. A number of 10 contemporary works that discuss drug law and the reasons for its prohibition have been used in this study. The study concluded that the works agreed that drug abuse is haram according to the Shari'a. All activities related to drug abuse such as planting, processing, owning, buying or selling permits used to cooperate with its misuse are haram. Likewise, in terms of its proofing proposition, all works tend to see it is based on the kias to the wine based on the argument that drugs are potentially intoxicating. The works only mention the destructive aspect without emphasizing it as an important basis for the prohibition of drug abuse. This is certainly not in accordance with the reality of the threat of drugs that not only grab the function of the intellect alone, even damaging the five-five main objectives of Islamic law, namely religion, life, intellect, descent and wealth. Hence the affirmation of the restrictive section needs to be emphasized in an effort to ensure fair drug abuse is prevented and handled more seriously in order to ensure the well-being of the ummah is maintained.

National audience

Penelitian ini bertujuan untuk mengetahui mutu protein dendeng ikan hiu (Chiloscyllium sp.) yang dikeringkan dengan menggunakan tiga jenis metode pengeringan yang berbeda, yaitu pengeringan dengan sinar matahari, oven udara panas (60°C) dan oven vakum (60°C). Sebelum dikeringkan, irisan daging ikan (ukuran 4 cm x 12 cm x 3 mm) direndam dalam larutan bumbu dan dikeringkan sehingga kandungan airnya berkisar antara 23-25%. Analisis dilakukan terhadap kandungan asam amino bahan baku dan dendeng hiu, dan nilai asam amino digunakan untuk menghitung skor kimia, skor asam amino, dan indeks asam amino. Hasil penelitian menunjukkan bahwa pada daging ikan hiu segar, skor kimia, skor asam amino, dan indeks asam amino esensial lebih tinggi dibandingkan dengan dendeng ikan hiu dengan berbagai cara pengeringan. Secara umum, pengeringan menyebabkan terjadinya penurunan mutu protein dendeng ikan hiu. Skor kimia, skor asam amino, dan indeks asam amino esensial daging ikan hiu segar berturut-turut adalah 65,93; 100,49; dan 89,13; pengeringan oven 56,48; 82,59; dan 75,86; pengeringan sinar matahari 51,15; 61,55; dan 79,43; dan pengeringan oven vakum 51,86; 62,41; dan 72,44. Hasil penelitian ini menunjukkan bahwa dendeng ikan hiu dengan pengeringan oven udara panas memiliki nilai skor kimia dan skor asam amino lebih tinggi, sedangkan dendeng dengan pengeringan sinar matahari memiliki indeks asam amino esensial lebih tinggi dari sampel lain

Adaptive neuro-fuzzy inference system (ANFIS) is a prospective approach in modeling weather parameters based on learning from historical data used. This study presented the comparison of tropospheric precipitable water vapor (PWV) between ANFIS and Global Positioning System (GPS) for areas in Pekan, Pahang, Malaysia. The PWV value was estimated with the ANFIS model with the surface meteorological data as inputs. The accuracy of PWV from ANFIS has been validated with PWV from GPS measurements for the period of 2010. The result showed that the ANFIS PWV has a similar trend with the GPS PWV (r = 0.999 at the 99% confidence level) and found a difference of 0.024%. The PWV from ANFIS was calculated 0.035% higher compared to GPS PWV and found a similar character in two seasonal monsoons. This indicates that the PWV obtained with ANFIS model agreed very well with GPS measurements and it can be implemented to monitor atmospheric variability as well as climate change studies in the absence of GPS data

International audience

[English]: This study examined the effect of Problem-based Learning (PBL) on students' creative mathematical thinking in Indonesia during the last eight years using meta-analysis. Data were obtained from primary studies published in national journals, conference proceedings, and master thesis from 2012 to 2020. This study analyzed 19 effect sizes from 19 primary studies that fulfill the inclusion criteria. The effect size index used the Hedges' g equation and statistical analysis was assisted by comprehensive meta-analysis (CMA) software. The effect size variation test was conducted by analyzing the study's five characteristics, namely the year of study, level of education, sample size, length of treatment, and publication sources. Based on the analysis results, the overall effect size was 0.821, with a standard error of 0.130 at the 95% confidence interval (CI) referring to the random-effects model. The effect size is classified as moderate, meaning that PBL has a moderately positive effect on students' creative mathematical thinking. The results of the analysis of the characteristics of the study show that the application of PBL to improve students' mathematical creative thinking relates to the research year (Q = 55.683; p <0.05), the treatment duration (Q = 5.644; p <0.05), and publication sources (Q = 13.812; p <0.05). It was found that the PBL was more effective in conditions of treatment duration of fewer than four meetings. There is a tendency that PBL has a significant impact when it is first implemented. The findings' implications are discussed to provide important information as a basic idea for further PBL research and implementation. Keywords: Problem-based learning, Creative thinking, Meta-analysis [Bahasa]: Penelitian ini menguji pengaruh problem-based learning (PBL) terhadap berpikir kreatif matematis siswa di Indonesia selama delapan tahun terakhir melalui meta-analisis. Data diperoleh dari studi primer yang telah dipublikasikan di jurnal nasional, prosiding konferensi, dan tesis master tahun 2012-2020. Penelitian ini menganalisis 19 ukuran efek dari 19 studi primer yang memenuhi kriteria penyertaan. Indeks ukuran efek menggunakan persamaan Hedges' g dan analisis statistik dibantu oleh perangkat lunak comprehensive meta-analysis (CMA). Pengujian variasi ukuran efek dilakukan dengan menganalisis lima karakteristik penelitian yaitu tahun studi, tingkat pendidikan, ukuran sampel, lama perawatan, dan sumber publikasi. Berdasarkan hasil analisis, ukuran efek keseluruhan adalah 0,821, dengan kesalahan standar 0,130 pada interval kepercayaan 95% (CI) menurut model efek acak. Ukuran efek tergolong sedang, artinya penggunaan PBL berpengaruh positif sedang terhadap berpikir kreatif matematis siswa. Hasil analisis karakteristik penelitian menunjukkan bahwa penerapan PBL untuk meningkatkan berpikir kreatif matematis siswa berkaitan dengan tahun penelitian (Q = 55,683; p <0,05), durasi perlakuan (Q = 5,644; p <0,05) , dan sumber publikasi (Q = 13.812; p <0.05). Ditemukan bahwa PBL lebih efektif pada kondisi durasi perlakuan kurang dari 4 pertemuan. Terdapat kecenderungan bahwa PBL berdampak besar saat pertama kali diterapkan. Implikasi hasil penelitian dibahas untuk memberikan informasi penting sebagai ide dasar untuk penelitian dan implementasi PBL selanjutnya. Kata kunci: Problem-based learning, Berpikir kreatif, Meta-analysis

Takaful operators are expected by the policyholders to act beyond the role of traditional insurance companies that only offer Shariah-compliant protection services. They are expected to be commercially viable. One of the ways to be commercially viable is takaful operators must be able to invest the policyholders' funds in the profitable investment avenues. Nevertheless, the critical issue before investing the funds is to develop products that are suitable with the takaful operators' investment strategy. This study employed a questionnaire survey to gather the feedback of fund managers from 11 takaful operators in Malaysia — all were the senior staffs of takaful operators in Malaysia were surveyed. The questionnaire is developed in the form of a Likert scale ranging from 1 to 5 as the research instrument. By Delphi technique, the draft of the questionnaire was sent to a panel of experts for review, was adopted, and their feedback reflected in the final questionnaire. The experts were a shariah advisor, a corporate finance manager, and a senior executive at the central bank. Findings indicate that policyholders' expectations on their investments are met and the products so far compatible with takaful operators' investment strategies.