Judul: Economic Valuation Analysis and Development Strategy of Pakansari Urban Forest
Abstrak: Hutan Kota Pakansari (HKP) merupakan hutan kota pertama di Kecamatan Cibinong hasil kolaborasi antara CSR Yayasan Korindo dan Pemerintah Kabupaten Bogor pada tahun 2019. Penelitian ini bertujuan: (1) Mengetahui skema kolaborasi antara Pemerintah Kabupaten Bogor dan Yayasan Korindo dalam membangun HKP, (2) Mengidentifikasi persepsi pengunjung terhadap kondisi lingkungan dan keberadaan HKP, (3) Mengestimasi nilai keberadaan HKP, (4) Mengestimasi nilai guna tidak langsung dari HKP, (5) Menganalisis strategi pengembangan HKP. Metode yang digunakan meliputi analisis deskriptif, Skala Likert, Contingent Valuation Method (CVM), pendekatan biomassa, Benefit Transfer dan Market Price, serta Interpretative Structural Modeling (ISM). Hasil penelitian menunjukkan: (1) Pembangunan HKP melalui 4 tahapan sebelum dilakukan serah terima dari Yayasan Korindo kepada Pemkab Bogor. (2) Pengunjung menilai kondisi lingkungan hutan kota pakansari dalam kondisi yang baik. (3) Nilai rata-rata WTP sebesar Rp5.207,79/orang, dengan total WTP masyarakat sebesar Rp1.499.691.880/tahun. (4) Nilai ekonomi serapan karbon sebesar Rp12.768.000/tahun, dan nilai resapan air sebesar Rp1.026.350/tahun, dengan total nilai guna tidak langsung Rp13.794.350/tahun. (5) Tujuan pembangunan HKP sebagai kontribusi terhadap mitigasi perubahan iklim tidak akan tercapai jika ketersediaan sarana dan prasarana, penyediaan anggaran dana dari lembaga atau pemerintah, serta pemberdayaan sumber daya manusia tidak memadai., Hutan Kota Pakansari (HKP) is the first urban forest in Cibinong Sub-district, a collaboration between Korindo Foundation CSR and Bogor Regency Government in 2019. This research aims to: (1) To identify the collaboration scheme between the Bogor Regency Government and Korindo Foundation in developing HKP, (2) To identify visitors' perceptions of environmental conditions and existence of HKP, (3) To estimate the value of HKP, (4) To estimate indirect use value of HKP, (5) To analyze HKP development strategies. Methods used include descriptive analysis, Likert Scale, Contingent Valuation Method (CVM), biomass approach, Benefit Transfer and Market Price, and Interpretative Structural Modeling (ISM). The results: (1) HKP development went through 4 stages before handover from Korindo Foundation to Bogor Regency Government. (2) Visitors assess environmental condition of HKP in good condition. (3) Average WTP value is Rp5,207.79/person, total community WTP of Rp1,499,691,880/year. (4) Economic value of carbon sequestration was Rp12,768,000/year, and value of water infiltration was Rp1,026,350/year, total indirect use value of Rp13,794,350/year. (5) Goal of HKP development as a contribution to climate change mitigation wont be achieved if the availability of facilities and infrastructure, the provision of budget funds from institutions or government, and empowerment of human resources are inadequate
Keyword: biomassa, hutan kota, Interpretative Structural Modelling, Contingent Valuation Method, skema kolaborasi

Judul: Economic Value Estimation and Green Open Space Management Strategy (Case Study: Kemayoran City Forest)
Abstrak: Hutan Kota Kemayoran merupakan salah satu ruang terbuka hijau yang mengusung tema “Three Wonderful Journeys” dengan fungsi untuk konservasi, rekreasi dan edukasi. Hutan Kota Kemayoran bertujuan untuk menyediakan tempat berkumpul atau bermain bagi keluarga khususnya bagi warga yang ada di sekitar Kemayoran. Kurangnya kesadaran pengunjung terhadap lingkungan mengakibatkan pengunjung tidak peduli untuk mempertahankan, merawat, dan menjaga keberadaan hutan kota yang sudah ada dan juga mengakibatkan beberapa permasalahan sehingga dapat mengganggu fungsi dari Hutan Kota Kemayoran. Penelitian ini bertujuan untuk (1) mengidentifikasi persepsi pengunjung, unit usaha, dan tenaga kerja terhadap keberadaan Hutan Kota Kemayoran, (2) mengestimasi nilai ekonomi dari Hutan Kota Kemayoran, (3) menganalisis strategi pengelolaan Hutan Kota Kemayoran yang berkelanjutan. Metode yang digunakan adalah skala likert, Contigent Valuation Method (CVM), dan Analytical Hierarchy Process (AHP). Hasil dari penelitian ini menunjukkan persepsi pengunjung, unit usaha, dan tenaga kerja terhadap keberadaan Hutan Kota Kemayoran adalah baik. Fungsi terpenting dari keberadaan Hutan Kota Kemayoran menurut responden adalah fungsi sosial/budaya. Nilai WTP rata-rata responden adalah sebesar Rp9.642,86 per orang per kunjungan sedangkan nilai total WTP responden sebesar Rp28.639.294,2 per tahun. Alternatif yang menjadi prioritas utama dalam kebijakan pengelolaan Hutan Kota Kemayoran yang berkelanjutan adalah sosialisasi fungsi hutan kota dengan skor 0,202., Kemayoran City Forest is one of the green open spaces that carries the theme "Three Wonderful Journeys" with functions for conservation, recreation and education. Kemayoran City Forest aims to provide a place to gather or play for families, especially for residents around Kemayoran. The lack of awareness of visitors to the environment results in visitors not caring about maintaining, caring for, and maintaining the existence of the existing urban forest and also causing several problems so that it can interfere with the function of the Kemayoran City Forest. The aims of this research are (1) identify the perceptions of visitors, business units, and workers on the existence of the Kemayoran City Forest, (2) estimate the economic value of the Kemayoran City Forest, (3) analyze the sustainable management strategy of the Kemayoran City Forest. The method used is a Likert scale, Contigent Valuation Method (CVM), and Analytical Hierarchy Process (AHP). The results of this research indicate that the perception of visitors, business units, and workers on the existence of the Kemayoran City Forest is good. The most important function of the existence of the Kemayoran City Forest according to the respondents is a social/cultural function. The average WTP value of respondents was Rp9.642,86 per person per visit, while the total WTP value of respondents was Rp28.639.294,2 per year. The alternative that becomes the main priority in the policy of sustainable Kemayoran City Forest management is the socialization of the function of the city forest with a score of 0,202.
Keyword: analytical hierarchy process, contingent valuation method, green open space, likert scale, urban

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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