Penelitian ini bertujuan untuk mengetahui bagaimana pemanfaatan media YouTube sebagai salah satu sumber belajar mahasiswa pada matakuliah rumpun politik kewarganegaraan ditinjau dari aspek penggunaan, tindak lanjut yang dilakukan, manfaat yang diperoleh, serta kendala apa saja yang dialami oleh mahasiswa Jurusan Ilmu Sosial Politik dalam menggunakan media YouTube sebagai sumber belajar. Lokasi penelitian ini berada di lingkungan Fakultas Ilmu Sosial Universitas Negeri Padang dan lingkungan sekitar tempat tinggal mahasiswa. Penelitian dilakukan dengan metode Survey. Populasi penelitian adalah seluruh mahasiswa Jurusan Ilmu Sosial Politik tahun masuk 2016-2017. Teknik pengambilan sampel dalam penelitian ini dilakukan dengan “Proportional Random Sampling”. Teknik pengumpulan data dilakukan melalui kuisioner, wawancara, dan dokumentasi. Data yang dikumpulkan tersebut dianalisis dengan analisis deskriptif dengan hitungan persentase. Kemudian setelah dilakukan analisis deskriptif dikonfirmasikan kembali kepada responden dengan wawancara. Hasil penelitian mengungkapkan bahwa jumlah mahasiswa yang menggunakan YouTube sebagai sumber belajar rumpun politik kewarganegaraan rendah yaitu 22,95%. penelitian juga mengungkapkan bahwa tindak lanjut dari mahasiswa yang menggunakan YouTube sebagai sumber belajar rumpun politik dalam taraf cukup.

Natural rubber is of significant economic importance owing to its excellent resilience, elasticity, abrasion and impact resistance. Despite that, natural rubber has been identified with some drawbacks such as low modulus and strength and therefore opens up the opportunity for adding a reinforcing agent. Apart from the conventional fillers such as silica, carbon black and lignocellulosic fibers, nanocellulose is also one of the ideal candidates. Nanocellulose is a promising filler with many excellent properties such as renewability, biocompatibility, non-toxicity, reactive surface, low density, high specific surface area, high tensile and elastic modulus. However, it has some limitations in hydrophobicity, solubility and compatibility and therefore it is very difficult to achieve good dispersion and interfacial properties with the natural rubber matrix. Surface modification is often carried out to enhance the interfacial compatibilities between nanocellulose and natural rubber and to alleviate difficulties in dispersing them in polar solvents or polymers. This paper aims to highlight the different surface modification methods employed by several researchers in modifying nanocellulose and its reinforcement effects in the natural rubber matrix. The mechanism of the different surface medication methods has been discussed. The review also lists out the conventional filler that had been used as reinforcing agent for natural rubber. The challenges and future prospective has also been concluded in the last part of this review.

Abstract. This article present about relapse among drug addicts in rehabilitation center. In Malaysia, many drug addicts relapse to drug use after discharged from successful treatment at rehabilitation center. Various effort and the authorities involved in assisting the National Anti-Drug Agency (NADA) efforts to cure and treat drug addicts. This article aims to examine the factors that affect relapse among drug addicts. Therefore, this article will discuss aspects of psychosocial factors including self-efficacy, family support, friends support and community support. Psychosocial factors, such as aspects of self-efficacy, family support, friends support and community support, had significant relationships with relapse. Psychological factors are also vital to design adequate treatment strategies. Thus, this article evaluating psychosocial factor as main factors that influenced the relapse addictions tendency amongst addicts.

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<em>The use of social media, especially by political figures, can directly bridge communications between politicians and their constituents and other supportive or opposing parties. This study aims to analyze the posts of political figures’ social media using discourse analysis to convey explicit or implicit messages that can not be separated from political intentions. Discourse analysis helps to understand the meaning of message or text of the media regarding the messenger's social environment and relationships. The study found that three political figures with most followers in three most popular social media platforms--Facebook, Instagram, and Twitter--Prabowo Subianto, Ridwan Kamil, and Susilo Bambang Yudhoyono represent their nationalism and Islamic identity in their social media posts. They also convey their opinions about the general political issues in spite of divisive political condition among public that is also visible among politicians.</em>