Judul: Dampak Ekonomi dan Daya Dukung Kawasan dalam Pengembangan Wisata Pulau Tidung, Kepulauan Seribu, DKI Jakarta
Abstrak: Tourism activities give an advantage in economic growth in some Indonesia areas, such as increasing income and opening job vacancy for local society. One areas that has potency in developing tourism sector is Tidung Island, DKI Jakarta. The tourism development was started in 2009, where the total tourism visiting Tidung Island is increasing every year. It has given a positive impact to the local economic. Economic impact from tourism activities were direct, indirect, and induce impact. Multiplier effect analysis method was used to analize economic impact in Tidung Island. Keynesian income multiplier value was 1.7 and ratio income multiplier type I and type II were 1.5 and 1.6. Moreover, the increasing of tourist number was potentially caused by over carrying capacity in some certain point areas in snorkeling and beach tourism, especially on peak season. So that, appropiate strategy is needed for managing and developing tourism area. Some alternative strategies that can be implemented for Tidung Island tourism management are: maintaining and increasing tourism management system; maintaining cooperation between management party, society, and tourist to protect resource and environment of tourism area; promoting new tourism; developing other potencial areas and new tourism activities to avoid over carrying capacity in some certain areas; increasing education and information to the society and tourist in maintaining the environment preservation, hygiene, and beauty of tourism area; and managing professionalism of local labor in tourism through training.
Keyword: Bogor Agricultural University, Tidung Island, over carrying capacity, management strategy, Economic impact

Judul: Analysis of the Ecotourism Potential of Coral  Reefs Around Tidung Island, Seribu Islands, Daerah Khusus Jakarta
Abstrak: Ekowisata terumbu karang yang terdapat pada Pulau Tidung memiliki potensi yang sangat besar. Namun, aktivitas ekowisata terumbu karang di Pulau Tidung memiliki beberapa permasalahan yang harus diatasi seperti perilaku wisatawan yang tidak bertanggung jawab, dan kebijakan pengelolaan yang belum optimal. Penelitian ini bertujuan untuk menganalisis potensi terumbu karang, mengetahui daya dukung, dan merancang strategi pengelolaan wisata bahari terumbu karang di Pulau Tidung, Kepulauan Seribu, Daerah Khusus Jakarta. Penelitian dilakukan pada bulan September hingga Desember 2023. Pengambilan data terkait terumbu karang dan ikan yang ada di terumbu karang dilakukan pada 9 titik area, diantaranya terdapat 3 area pada Pulau Tidung Kecil dan 6 area pada Pulau Tidung Besar. Pengambilan data wawancara terhadap wisatawan dilakukan di Pulau Tidung Besar. Analisis data yang digunakan dalam penelitian ini yaitu indeks kesesuaian ekowisata kategori wisata selam, daya dukung kawasan, dan analisis SWOT. Hasil yang diperoleh yaitu Pulau Tidung memiliki tutupan yang beragam, jenis lifeform yang paling banyak ditemukan yaitu Rubble, jenis ikan terdiri dari 9 famili, indeks kesesuaian yang menunjukkan beberapa wilayah yang sesuai dan tidak sesuai, dan kesesuaian beberapa area dengan daya dukung., Coral reef ecotourism on Tidung Island has enormous potential. However, coral reef ecotourism activities on Tidung Island have several problems that must be overcome, such as irresponsible tourist behavior, and management policies that are not yet optimal. This research aims to analyze the potential of coral reefs, determine their carrying capacity, and design strategies for managing coral reef marine tourism on Tidung Island, Seribu Islands, Daerah Khusus Jakarta. The research was carried out from September to December 2023. Data collection regarding coral reefs and fish on coral reefs was carried out at 9 stations, including 3 stations on Tidung Kecil Island and 6 stations on Tidung Besar Island. Data collection from interviews with tourists was carried out on Tidung Besar Island. The data analysis used in this research is the ecotourism suitability index for the diving tourism category, regional carrying capacity, and SWOT analysis. The results obtained are that Tidung Island has a variety of cover, the most common type of lifeform is Rubble, fish species consist of 9 families, a suitability index that shows several suitable and unsuitable areas, and the suitability of several stations with carrying capacity.
Keyword: Carrying capacity, Coral reefs, Ecotourism, Tidung Island, carrying capacity, Ecotourism, Tidung Island, Coral Reefs

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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