Judul: Nilai Manfaat Ekonomi Dan Dampak yang Ditimbulkan Wisata Alam Terhadap Perilaku Orang utan di Pusat Rehabilitasi Orangutan Bohorok
Abstrak: Banyaknya orangutan yang dipelihara atau yang diperjualbelikan oleh masyarakat di daerah Aceh dan Sumatcra Utara mendorong dibentuknya Pusat Rehabilitasi Orangutan Bohorok. Pembukaan Pusat Rehabilitasi Orangutan untuk pengunjung tclalt menaikkan perritintaan wisata alam ke Bukit Lawaog. Banyaknya pcngunjung tidak menjadi jaminan semakin banyaknya masukan dana bagi pengelola pusat Rchabilitasi 0rang utan. namun semakin banyaknya pengunjung menyebabkan orang utan semakin terbiasa dengan kehadiran pengunjung sehingga proses peliaran kembali orangutan rehabilitasi akan semakin lambat dan orang utan liar akan ikut terkontaminasi keadaan sedemikian sehingga pola aktivitas hariannya ikut berubah
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Judul: Experience and the Impact of Voluntourism at Samboja Lestari Orangutan Rehabilitation Center
Abstrak: Voluntourism is a form of alternative tourism that growing rapidly in recent years, mixing voluntary works and tourism activity in developing countries, including Indonesia. Borneo Orangutan Survival Foundation (BOSF), alongside with The Great Project (TGP) are organizations that managed this program. The objective of the research was to analyze how program implemented, identify voluntourists‟ characteristics, motives, perceptions, and satisfactions towards the program, also the impact of the voluntourism program. The research was conducted in Samboja Lestari Orangutan Rehabilitation Center on June 1 –July 23 2018 through questionnaires, interview, and field observation. Voluntourist activities were mainly prepares food (for orangutan and sunbear) and enrichment on weekdays, tourism activity on weekends. The biggest groups of voluntourist were female, UK nationality, youth and late adult age class, and working on finance. Environment aspect was the main motivation and benefit for voluntourists, while staff quality and supervision were aspect that received best perception and satisfaction from voluntourists. Various impacts from voluntourism program were received local staff, BOSF, TGP, orangutan and sunbear.
Keyword: experience, impact, Samboja Lestari, voluntourism

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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