Judul: Estimation of Environment Gross Regional Domestic Product of Purbalingga District
Abstrak: Nilai Produk Domestik Regional Bruto (PDRB) Konvensional Kabupaten Purbalingga mengalami tren meningkat pada tahun 2017-2019 menunjukkan kondisi perekonomian yang positif, namun PDRB Konvensional tersebut belum mengintegrasikan nilai deplesi dan degradasi sumberdaya didalam perhitungannya. Tujuan dari penelitian ini ialah (1) mengestimasi nilai deplesi sumberdaya dan degradasi lingkungan sebagai dampak dari aktivitas perekonomian seluruh sektor lapangan usaha PDRB Kabupaten Purbalingga (2) mengestimasi nilai PDRB LH Kabupaten Purbalingga (3) mengidentifikasi sektor-sektor yang berpotensi menjadi sektor basis dan non basis pada perekonomian Kabupaten Purbalingga. Penelitian ini memakai data sekunder dari instansi-instansi terkait dan penelitian terdahulu. Pendekatan dan metode analisis yang digunakan ialah pendekatan pasar & unit rent, pendekatan lahan kritis & produktivitas lahan, serta analisis location quotient. Hasil penelitian mengungkapkan bahwa pada tahun 2019 di Kabupaten Purbalingga, deplesi sumberdaya air dan degradasi lingkungan mewujudkan nilai PDRB LH menjadi sebesar Rp. 24.348.748.331.140,00 atau lebih kecil sekitar 2,28% dari PDRB Konvensional, kemudian terdapat 6 sektor basis dan 11 sektor non basis pada perekonomian Kabupaten Purbalingga. Nilai PDRB LH dan sektor basis menjadi komponen esensial bagi pemerintah Kabupaten Purbalingga dalam melaksanakan eskalasi pembangunan yang bersifat berkelanjutan., The value of the Conventional Gross Regional Domestic Product (GRDP) of Purbalingga Regency experienced an increasing trend in 2017-2019 indicating positive economic conditions, but the Conventional GRDP has not integrated the value of resource depletion and degradation in its calculations. The objectives of this study are (1) to estimate the value of resource depletion and environmental degradation as a result of economic activity in all sectors of the Purbalingga Regency GRDP (2) to estimate the value of the LH GRDP in Purbalingga Regency (3) to identify sectors that have the potential to become basic and non-basic sectors basis of the economy of Purbalingga Regency. This study uses secondary data from related agencies and previous research. Approaches and analytical methods used are market and unit rent approaches, critical land & land productivity approaches, and location quotient analysis. The results of the study revealed that in 2019 in Purbalingga Regency, depletion of water resources and environmental degradation resulted in the GRDP value of the LH being 24,348,748,331,140.00 IDR or less, about 2.28% of conventional GRDP, then there are 6 basic sectors and 11 non-base sectors in the economy of Purbalingga Regency. The GRDP value of the LH and the base sector are essential components for the Purbalingga Regency government in carrying out sustainable development escalation.
Keyword: depreciation, environmental GRDP, escalation, location quotient analysis, rent unit

Judul: Estimation of Environment Gross Regional Domestic Product of Yogyakarta City
Abstrak: Peningkatan Produk Domestik Regional Bruto (PDRB) Kota Yogyakarta menunjukkan pertumbuhan ekonomi yang positif. Namun, PDRB Konvensional tersebut tidak menginternalisasikan nilai deplesi dan degradasi sumberdaya dan lingkungan. Perhitungan PDRB Lingkungan Hidup (LH) diperlukan untuk mengetahui pertumbuhan ekonomi Kota Yogyakarta yang telah memasukkan nilai deplesi dan degradasi. Tujuan dari penelitian ini adalah (1) mengidentifikasi keragaan dari sektor-sektor PDRB konvensional Kota Yogyakarta, (2) mengestimasi nilai deplesi sumberdaya dan degradasi lingkungan yang diakibatkan oleh kegiatan di berbagai sektor PDRB Kota Yogyakarta, serta (3) mengestimasi nilai PDRB LH Kota Yogyakarta. Penelitian ini menggunakan data sekunder dari instansi-instansi terkait dan penelitian-penelitian terdahulu. Identifikasi keragaan PDRB Kota Yogyakarta dilakukan dengan menggunakan analisis deskriptif dan analisis Location Quotient. Nilai deplesi diestimasi terhadap sumberdaya air dengan pendekatan unit rent. Nilai degradasi diestimasi dengan pendekatan Cost of Illness dan biaya mengatasi emisi CO2. Estimasi nilai deplesi dan degradasi tersebut menjadi pengurang bagi PDRB Konvensional Kota Yogyakarta, sehingga diperoleh estimasi PDRB LH Kota Yogyakarta. Hasil penelitian menunjukkan bahwa pada tahun 2019 di Kota Yogyakarta, deplesi sumberdaya dan degradasi lingkungan membuat nilai PDRB LH menjadi sebesar Rp35.193,20 miliar, lebih rendah sekitar 3,61% dari PDRB Konvensional. Nilai PDRB LH yang lebih rendah mengindikasikan bahwa prinsip pembangunan berkelanjutan penting untuk diterapkan dalam kegiatan ekonomi., The increasing Yogyakarta City’s Gross Regional Domestic Product (GRDP) indicates positive economic growth. However, the Conventional GRDP doesn’t include resources depletion and environmental degradation value. Environment GRDP (EGRDP) calculation is required to know Yogyakarta City’s economic growth that includes the depletion and degradation value. The research’s objectives are (1) identify the Conventional GRDP sectors' performance in Yogyakarta City, (2) Estimate resources depletion and environmental degradation value caused by activities in various sectors of Yogyakarta City’s GRDP, and (3) estimate the Yogyakarta City’s EGRDP value. This research used secondary data from related agencies and previous studies. Yogyakarta City’s GRDP was identified using descriptive and Location Quotient analysis. Water resources depletion value was estimated using the rent unit approach. Degradation value was estimated using the Cost of Illness and CO2 emission reduction cost approach. The depletion and degradation values estimation became a deduction for the Yogyakarta City’s Conventional GRDP so that the Yogyakarta City’s EGRDP estimation is obtained. The results show that in 2019 in Yogyakarta City, the depletion and degradation made the EGRDP value be 35.193,20 billion IDR, around 3,61% lower than Conventional GRDP. The lower EGRDP value indicates the sustainable development principles are important to be applied in economic activities.
Keyword: Conventional GRDP, degradation, depletion, depreciation, rent unit

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.
Keyword: