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: Use Value Estimation of City Forest 2 BSD in South Tangerang City
Abstrak: Hutan Kota 2 BSD sebagai ruang terbuka hijau memberikan berbagai layanan Sumber Daya Alam dan Lingkungan (SDAL). Nilai dari SDAL seringkali tidak tercermin dalam nilai pasar sehingga menimbulkan penilaian terhadap SDAL tersebut terlalu rendah. Penelitian ini bertujuan untuk (1) Mengetahui persepsi wisatawan terhadap kondisi Hutan Kota 2 BSD; (2) Mengestimasi nilai ekonomi wisata dari Hutan Kota 2 BSD; (3) Mengidentifikasi faktor-faktor yang memengaruhi jumlah kunjungan ke Hutan Kota 2 BSD; (4) Mengestimasi nilai ekonomi Hutan Kota 2 BSD sebagai penyerap karbon; dan (5) mengestimasi nilai ekonomi Hutan Kota 2 BSD sebagai penghasil oksigen. Metode analisis data yang digunakan dalam penelitian adalah skala likert, travel cost method, regresi Poisson, dan benefit transfer. Hasil penelitian menunjukkan bahwa persepsi wisatawan mengenai kondisi Hutan Kota 2 BSD adalah baik. Hasil estimasi nilai ekonomi wisata diperoleh sebesar Rp 14.018.048.565 per tahun dan terdapat enam faktor yang memengaruhi jumlah kunjungan yaitu, biaya perjalanan, pendapatan, jarak tempuh, lama mengetahui hutan kota, spot foto instagramble, dan persepsi rata-rata wisatawan terhadap kondisi hutan kota. Nilai ekonomi Hutan Kota 2 BSD sebagai penyerap karbon sebesar Rp 572.618.787 per tahun dan nilai ekonomi Hutan Kota 2 BSD sebagai penghasil oksigen sebesar Rp 68.865.869.885 per tahun. Nilai guna dari Hutan Kota 2 BSD diestimasi sebesar Rp 83.456.537.237 per tahun., City Forest 2 BSD as a green open space provides a variety of natural resources and environmental services. The value of natural and environmental resources is often not reflected in market values and therefore makes the assessment of natural and environmental resources too low. This research intends to (1) Analyze tourist perceptions related to City Forest 2 BSD condition; (2) Approximation the economic value of tourism from City Forest 2 BSD; (3) Identifying all factor that influences the number of visits to City Forest 2 BSD; (4) Calculation the economic value of City Forest 2 BSD as an element sink; and (5) estimate the economic value of City Forest 2 BSD as an oxygen producer. The data analysis method used in this research is the skale likert, travel cost method, Poisson regression, and benefits transfer. The results show that tourist perception about City Forest 2 BSD condition is good. The estimation results of the economic value of tourism amounting to IDR 14.018.048.565 per year also there are six factors that influence the number of visits to City Forest 2 BSD, travel cost, income, distance traveled, long known city forest, instagramble photo spot, and the average perception of the city forest condition. The economic value of City Forest 2 BSD as a carbon sink was IDR 572.618.787 per year and the economic value of City Forest 2 BSD as an oxygen producer was IDR 68.685.869.885 per year. The use-value of City Forest 2 BSD is estimated at IDR 83.456.537.237 per year.
Keyword: benefit transfer, economic value, likert scale, Poisson regression, travel cost method

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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