Judul: Green Productivity as an Approach to Address the Environmental Problem of Leather Tanning SMEs in Yogyakarta, Indonesia
Abstrak: The leather tanning industry is a most promising industry in Yogyakarta. However, the industry faces environmental problems due to poor environmental management practices. This study develops strategies to address the environmental issues of the impact of leather tanning SMEs in Yogyakarta. It identifies opportunities for improvement based on Green Productivity (GP) approach, and obstacles to formulating strategies for enhancing environmental performance. This study uses a Case Study approach using field observations and interviews with a number of leather tanning SMEs and industry experts. The results show that the SMEs in this sector adopt only a limited level of environmental practices. A set of GP options is proposed based on the observational evidence and expert judgements. Using an Analytic Hierarchy Process (AHP), a priority selected is to optimize the production processes of leather tanning SMEs. This study found that internal obstacles to green adoption included insufficient resources and infrastructure, low-skilled human resources, poor financial capability, lack of awareness, and poor organizational strategies. The external obstacles are significant and include inadequate law enforcement and government support, a small and limited market segment, and the lack of available green chemicals. These contribute toward poor environmental practices. To deal with these problems, this research proposes eight strategies for tackling the obstacles that prevent the implementation of leather tanning green practices. The strategies are divided into internal and collaborative. The internal strategies include encouraging enhanced product development processes and promote proactive and innovative strategies. Regarding their limitations, SMEs need stakeholder assistance to help solve their issues. A collaborative approach is crucial. Developing low-cost green technologies through R&D activities, developing best practice guidance and promoting its implementation, providing adequate facilities and machinery, identifying suitable suppliers to supply green chemicals, intensifying knowledge transfer of good environmental management, and establish a punishment and reward system are proposed for addressing the issues.
Keyword: green productivity, leather SMEs, AHP, SWOT

Judul: Kajian Implementasi Produksi Bersih di Industri Penyamakan Kulit (Kasus Desa Cibuluh, Kecamatan Bogor Utara)
Abstrak: Leather tanning industries are industries that process animal skin to produce finish leather product by using many stages of process. Every stage of the process will generate a large amount of wastes, either liquid or solid wastes. If the waste is not treated properly, it will cause environmental pollution. Implementation of cleaner production strategy can be used to solve this problem. This research studies the potentials of cleaner production application and alternative of cleaner production strategy in order to develop environmental friendly tanning industry in Cibuluh. The method used was process identification, waste sourch identification, and cleaner production analysis strategy. The cleaner production alternatives which are potential to be applied are design of installation wastewater to IPAL with pipe from molen machine, reuse wastewater from pre soaking process for the next batch, separation wastewater from hair and flesh, processing of fleshing waste for fat, and recycle chromium from tanning wastewater. Based on the priority alternative, three options were selected, namely recycle chromium from tanning wastewater, separation wastewater from hair and flesh, and reuse wastewater from pre soaking process for the next batch. The total investment of these option is Rp 2,059,500,- with pay back period (PBP) of 0.17 month. The Analitycal Hierarchy Process (AHP) analysis result shows that industrial policy is the most important factor to minimize waste product of tanning industry. The priority of cleaner production program from AHP analysis is recycle chromium from tanning wastewater which is consistent to that resulted from field study.
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Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa