Judul: Level of Traditional Knowledge and Language Vitality Gayo Lut in Central Aceh
Abstrak: Pengetahuan tradisional masyarakat Gayo Lut sangat penting dalam upaya pelestarian keanekaragaman hayati. Pengetahuan diwariskan melalui bahasa sebagai media komunikasi yang menyimpan kekayaan pengetahuan dan cara dalam mengelola keanekaragaman hayati, oleh karena itu menjadi penting untuk diukur. Penelitian ini bertujuan untuk: (1) mengukur tingkat pengetahuan tradisional dan vitalitas bahasa Gayo Lut, dan (2) mengidentifikasi faktor pembatas terhadap tingkat pengetahuan tradisional dan vitalitas bahasa Gayo Lut. Pengumpulan data dilakukan dengan wawancara secara purposive sampling menggunakan TraLavi (Traditional Knowledge and Language Vitality Index) yang berfokus pada tumbuhan pangan. Kriteria yang digunakan yaitu prioritas bahasa (A), pengambilan informasi (B), erosi pengetahuan tradisional (C), pengenalan visual (D), dan pewarisan pengetahuan tradisional (E). Hasil penelitian menunjukkan bahwa dengan skor TraLaVi sebesar 0,85 yang berarti bahasa Gayo Lut termasuk pada status aman. Faktor pembatas tingkat pengetahuan tradisional dan vitalitas bahasa Gayo Lut yaitu usia (p-value 0,001) dan status menikah (p-value 0,006) berpengaruh secara signifikan. Perbedaan usia dapat memengaruhi tingkat pengetahuan tradisional dan vitalitas bahasa Gayo Lut, sedangkan status menikah yang sesama Gayo Lut mampu memengaruhi keberlanjutan bahasa., Traditional knowledge of the Gayo Lut community is very important in efforts to conserve biodiversity. Knowledge transmission through language as a communication tool that stores a assests of knowledge and method to manage biodiversity, therefore it is important to measure. This study aims to: (1) measure the level of traditional knowledge and vitality of the language Gayo Lut, and (2) identify the limiting factors of traditional knowledge and language vitality Gayo Lut. Data were collected by interview in purposive sampling using TraLaVi (Traditional Knowledge and Language Vitality Index) which focuses on food plants. The criteria used are language priority (A), retrieval of information (B), traditional knowledge erosion (C), visual recognition (D), and traditional knowledge transmission (E). The results a TraLavi score of 0,85 meaning that the Gayo Lut language is included in the safe status. Limiting factors in level of traditional knowledge and language vitality Gayo Lut such as age (p-value 0,001) and marital status (p-value 0,006) had a significant effect. Differences in age can affect the level of traditional knowledge and language vitality Gayo Lut, while the marital status of the same Gayo Lut can affect the sustainability of the language.
Keyword: ethnotaxonomy, language vitality, traditional knowledge

Judul: Local Wisdom of the Sentarum Lake Community in an  Effort to Conserve Lutung Sentarum (Presbytis chrysomelas ssp cruciger).
Abstrak: Kearifan lokal masyarakat Danau Sentarum dapat menunjang konservasi Lutung Sentarum yang berstatus critically endangered (CR). Penelitian ini mengidentifikasi dan menilai unsur budaya dan jenis kearifan lokal masyarakat tersebut dalam kelestarian Lutung Sentarum, serta mengidentifikasi dinamika perubahan dalam kearifan lokal. Pengambilan data yaitu wawancara dilakukan dengan metode snowball yang di mulai dari kepala pemerintah dan kepala adat. Beberapa unsur budaya yang berperan dalam konservasi Lutung Sentarum yaitu sistem bahasa, sistem mata pencaharian, sistem religi, sistem sosial keluarga. Dinamika perubahan mitos, tempat tinggal, dan perburuan berdampak pula terhadap kelestarian Lutung Sentarum. Dampak baik dari perubahan yang terjadi dapat mengurangi perambahan hutan yang menjadi habitat Lutung Sentarum. Nilai kearifan lokal muncul dalam kehidupan masyarakat seperti nilai pengetahuan dan mitos dalam upaya pelestarian sumberdaya hayati. Selain itu terdapat anjuran dan larangan pada masyarakat lokal yang mendukung konservasi Lutung Sentarum. Persepsi masyarakat lokal yang mendukung segala upaya pelestarian Lutung Sentarum sangat penting untuk mendukung dan menjelaskan seberapa pentingnya Lutung Sentarum di lingkungan tempat tinggal masyarakat tradisional. Kata kunci : Dinamika, kearifan lokal, Lutung Sentarum , unsur budaya, The local wisdom of the people of Danau Sentarum can support the conservation of the critically endangered (CR) Sentarum langurs. This research identify and assess cultural elements and types of local wisdom in the preservation of Sentarum langurs, as well as identify the dynamics of change in local wisdom. Data collection, interviews using the snowball method starting from the head of the government and the customary head. Some cultural elements play a role in the conservation of Sentarum langurs are the language system, livelihood system, religious system, and family social system. The dynamics of changes in myths, residence, and hunting also have an impact on the conservation of Sentarum langurs. The good impact is can reduce forest encroachment which is the habitat of Sentarum langurs. The value of local wisdom appears in people's lives such as the value of knowledge and myths in efforts to conserve biological resources. In addition, there are recommendations and prohibitions in local communities that support the conservation of Sentarum langurs. The perception of local communities that support conserve Sentarum Sentarum is very important to support and explain how important Sentarum langurs are in the environment where traditional communities live. Keywords: cultural elements, dynamics, local wisdom, Sentarum langurs.
Keyword: Kearifan Lokal, Konservasi, Lutung sentarum, cultural elements, dynamics, local wisdom, Sentarum langurs

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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