5,999 research outputs found
Pengendalian Kerusakan Lingkungan Atas Perizinan Migas Di Kabupaten Banggai Berdasarkan Undang-undang Nomor 32 Tahun 2009 Tentang Perlindungan Dan Pengelolaan Lingkungan Hidup
Masuknya kegiatan USAha Perusahaan PT. DS-LNG (Donggi-Senoro Liquid Natural Gas) di Kecamatan Batui kabupaten Banggai Provinsi Sulawesi Tengah diharapkan dapat mampu mendorong peningkatan pendapatan regional maupun nasional. Pembangunan proyek pengembangan Gas itu dibagi dengan dua konsep yaitu sektor hulu dan sektor hilir. Adapun dalam penulisan ini, penulis mengangkat judul âPengendalian Kerusakan Lingkungan Atas Perizinan Migas Di Kabupaten Banggai Berdasarkan Undang-Undang Nomor 32 Tahun 2009 Tentang Perlindungan Dan Pengelolaan Lingkungan Hidup.TerkaitUndang-Undang Nomor 32 Tahun 2009 tentang perlindungan dan pengendalian lingkungan hidup di mana UU tersebut berfungsi sebagai instrumen hukum, khususnya kegiatan USAha yang dilakukan oleh DS-LNG yang akan menimbulkan risiko positif ataupun negatif.Dari uraian di atas, penulis mencoba mangangkat masalah: (1) Apakah kegiatan pengolahan proyek pengembangan Gas DS-LNG berisiko menimbulkan dampak bagi lingkungan dan masyarakat; (2) Bagaimana pengendalian dan pencegahan kerusakan lingkungan atas pengolahan Gas oleh DS-LNG menurut Undang-Undang Nomor 32 Tahun 2009 tentang perlindungan dan pengendalian lingkungan hidup. Dalam penelitian ini, penulis menggunakan metode penelitian yuridis normatif. Dimana metode penelitian ini mengkaji asas-asas hukum dan sistematika hukum. Tehnik pengumpulan data dilakukan melalui studi kepustakaan berupa bahan hukum primer, sekunder, maupun tersier. Semua data kepustakaan dikumpulkan, kemudian dianalisis dan hasilnya dituangkan dalam bentuk deskriptif.Jadi berdasarkan hasil analisis penulis, maka dapat ditarik satu benang merah bahwa proyek pengembangan Gas DS-LNG dapat menimbulkan risiko negatif maupun positif
High-Ampacity Power Cables of Tightly-Packed and Aligned Carbon Nanotubes
We characterize the current-carrying capacity (CCC), or ampacity, of
highly-conductive, light, and strong carbon nanotube (CNT) fibers by measuring
their failure current density (FCD) and continuous current rating (CCR) values.
We show, both experimentally and theoretically, that the CCC of these fibers is
determined by the balance between current-induced Joule heating and heat
exchange with the surroundings. The measured FCD values of the fibers range
from 10 to 10 A/m and are generally higher than the previously
reported values for aligned buckypapers, carbon fibers, and CNT fibers. To our
knowledge, this is the first time the CCR for a CNT fiber has been reported. We
demonstrate that the specific CCC (i.e., normalized by the linear mass density)
of our CNT fibers are higher than those of copper.Comment: 14 pages, 8 figure
Stability of 1-D Excitons in Carbon Nanotubes under High Laser Excitations
Through ultrafast pump-probe spectroscopy with intense pump pulses and a wide
continuum probe, we show that interband exciton peaks in single-walled carbon
nanotubes (SWNTs) are extremely stable under high laser excitations. Estimates
of the initial densities of excitons from the excitation conditions, combined
with recent theoretical calculations of exciton Bohr radii for SWNTs, suggest
that their positions do not change at all even near the Mott density. In
addition, we found that the presence of lowest-subband excitons broadens all
absorption peaks, including those in the second-subband range, which provides a
consistent explanation for the complex spectral dependence of pump-probe
signals reported for SWNTs.Comment: 4 pages, 4 figure
Autophagosome formation is initiated at phosphatidylinositol synthaseâenriched ER subdomains
The autophagosome, a doubleâmembrane structure mediating degradation of cytoplasmic materials by macroautophagy, is formed in close proximity to the endoplasmic reticulum (ER). However, how the ER membrane is involved in autophagy initiation and to which membrane structures the autophagyâinitiation complex is localized have not been fully characterized. Here, we were able to biochemically analyze autophagic intermediate membranes and show that the autophagyâinitiation complex containing ULK and FIP200 first associates with the ER membrane. To further characterize the ER subdomain, we screened phospholipid biosynthetic enzymes and found that the autophagyâinitiation complex localizes to phosphatidylinositol synthase (PIS)âenriched ER subdomains. Then, the initiation complex translocates to the ATG9Aâpositive autophagosome precursors in a PI3Pâdependent manner. Depletion of phosphatidylinositol (PI) by targeting bacterial PIâspecific phospholipase C to the PIS domain impairs recruitment of downstream autophagy factors and autophagosome formation. These findings suggest that the autophagyâinitiation complex, the PISâenriched ER subdomain, and ATG9A vesicles together initiate autophagosome formation
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