Analisis Kesesuaian Penggunaan Lahan Berdasarkan Arahan Fungsi Kawasan Di Daerah Aliran Sungai (DAS) Alo Kabupaten Gorontalo (Analysis of the Suitability of Land Use Based on the Direction of the Function of the Area in Alo Basin in Gorontalo District)

- Penetapan fungsi kawasan sangat penting guna menjaga kelestarian dan mencegah kerusakan lingkungan, sehingga dapat meningkatan keselamatan, kesejahteraan serta Kenyamanan hidup. Kejadian longsor di Kabupaten Gorontalo sebagian dari wilayah DAS Alo yaitu berada di Kecamatan Pulubala dan Kecamatan Tibawa telah menghancurkan 221 buah rumah, 31 buah rumah di antaranya rusak parah, dan korban luka-luka sejumlah 628 orang. Selain itu yang menjadi faktor penyebab longsoran di DAS Alo diantaranya adalah faktor lereng, jenis tanah, curah hujan yang tinggi dan pemanfaatan lahan oleh masyarakat. Penelitian ini bertujuan untuk: (1) Memetakan arahan fungsi utama kawasan di DAS Alo berdasarkan Surat Keputusan Menteri Pertanian Nomor 837/Kpts/Um/11/1980 (2) Menganalisis kesesuaian penggunaan lahan di DAS Alo berdasarkan arahan fungsi utama kawasan dan menyajikannya dalam bentuk peta. Metode dan analisis yang digunakan dalam penelitian ini adalah skoring, overlay, dan survey lapangan. Berdasarkan hasil analisis DAS Alo memiliki 4 arahan fungsi kawasan yaitu Arahan fungsi kawasan lindung memilki luas 93.09 ha (0.40%), kawasan penyangga 4970.74 ha (21.13), kawasan budidaya tanaman tahunan 3614,56 ha (15,37%), sedangkan kawasan budidaya tanaman semusim dan pemukiman memilki luas sebasar 14.843,3 ha (63,10%). Sebagian besar pemanfaatan lahan di DAS Alo dikatakan sudah sesuai terhadap arahan fungsi kawasan, dimana lahan sesuai memilki luas 18.566,6 ha atau 79,05 % sedangkan lahan yang tidak sesuai 4.920,7 ha atau 20,95 % dari seluruh wilayah DAS Alo. Kata kunci: kesesuaian lahan, arahan fungsi lahan, daerah aliran sungai alo, Gorontal

DAMPAK PENAMBANGAN EMAS ILEGAL DI KABUPATEN BURU TERHADAP KONSENTRASI MERKURI (Hg) PADA KEPITING BAKAU (Scylla serrata) DAN KEONG BAKAU (Telescopium telescopium)

Background: Illegal gold mining in Buru Regency uses the heavy metal mercury toprocess gold material, so it can pollute the environment, including aquatic biota such asmangrove crabs (Scylla serrata) and mangrove snails (Telescopium telescopium). The aimof this research is to analyze the amount of mercury concentration and the level of pollutionin mangrove crabs and snails as a result of illegal gold mining in Buru Regency.Methods: Research samples were taken at the Waelata River Estuary and the AnahoniRiver Estuary. For mercury analysis, 8 mangrove crabs and 16 mangrove snails weretaken. Analysis of mercury concentration using the AAS Cold Vapor method.Results: The results showed that the heavy metal mercury was detected in mangrovecrabs and mangrove snails. The concentration of mercury detected is still below the qualitystandard set based on heavy metal contamination (SNI) No. 7387 of 2009, specifically forthe heavy metal Hg in shellfish (bilvalves), mollusks and sea cucumbers, shrimp and othercrustaceans at 1.0 mg/kg (ppm).Conclusion: Illegal gold mining in Buru Regency has an impact on mercury concentrationsin mangrove crabs and mangrove snails, but the value is still below the specified qualitystandards. However, consumption of mangrove crabs and mangrove snails that live aroundgold mining areas in Buru Regency must be limited, considering the nature of mercuryaccumulation

OC-0247: Carbon ion radiotherapy for adenoid cystic carcinomas invading the skull base

n/

Measurement of the electron transmission rate of the gating foil for the TPC of the ILC experiment

We have developed a gating foil for the time projection chamber envisaged as a central tracker for the international linear collider experiment. It has a structure similar to the Gas Electron Multiplier (GEM) with a higher optical aperture ratio and functions as an ion gate without gas amplification. The transmission rate for electrons was measured in a counting mode for a wide range of the voltages applied across the foil using an $^{55}$Fe source and a laser in the absence of a magnetic field. The blocking power of the foil against positive ions was estimated from the electron transmissions.Comment: 25 pages containing 14 figures and 1 tabl

The occupation of a box as a toy model for the seismic cycle of a fault

We illustrate how a simple statistical model can describe the quasiperiodic occurrence of large earthquakes. The model idealizes the loading of elastic energy in a seismic fault by the stochastic filling of a box. The emptying of the box after it is full is analogous to the generation of a large earthquake in which the fault relaxes after having been loaded to its failure threshold. The duration of the filling process is analogous to the seismic cycle, the time interval between two successive large earthquakes in a particular fault. The simplicity of the model enables us to derive the statistical distribution of its seismic cycle. We use this distribution to fit the series of earthquakes with magnitude around 6 that occurred at the Parkfield segment of the San Andreas fault in California. Using this fit, we estimate the probability of the next large earthquake at Parkfield and devise a simple forecasting strategy.Comment: Final version of the published paper, with an erratum and an unpublished appendix with some proof

Application of 57Fe Mössbauer spectroscopy as a tool for mining exploration of bornite (Cu5FeS4) copper ore

Nuclear resonance methods, including Mössbauer spectroscopy, are considered as unique techniques suitable for remote on-line mineralogical analysis. The employment of these methods provides potentially significant commercial benefits for mining industry. As applied to copper sulfide ores, Mössbauer spectroscopy method is suitable for the analysis noted. Bornite (formally Cu5FeS4) is a significant part of copper ore and identification of its properties is important for economic exploitation of commercial copper ore deposits. A series of natural bornite samples was studied by 57Fe Mössbauer spectroscopy. Two aspects were considered: reexamination of 57Fe Mössbauer properties of natural bornite samples and their stability irrespective of origin and potential use of miniaturized Mössbauer spectrometers MIMOS II for in-situ bornite identification. The results obtained show a number of potential benefits of introducing the available portative Mössbauer equipment into the mining industry for express mineralogical analysis. In addition, results of some preliminary 63,65Cu nuclear quadrupole resonance (NQR) studies of bornite are reported and their merits with Mössbauer techniques for bornite detection discussed

Clinical outcomes of stereotactic body radiotherapy for stage I non-small cell lung cancer using different doses depending on tumor size

<p>Abstract</p> <p>Background</p> <p>The treatment schedules for stereotactic body radiotherapy (SBRT) for lung cancer vary from institution to institution. Several reports have indicated that stage IB patients had worse outcomes than stage IA patients when the same dose was used. We evaluated the clinical outcomes of SBRT for stage I non-small cell lung cancer (NSCLC) treated with different doses depending on tumor diameter.</p> <p>Methods</p> <p>Between February 2004 and November 2008, 124 patients with stage I NSCLC underwent SBRT. Total doses of 44, 48, and 52 Gy were administered for tumors with a longest diameter of less than 1.5 cm, 1.5-3 cm, and larger than 3 cm, respectively. All doses were given in 4 fractions.</p> <p>Results</p> <p>For all 124 patients, overall survival was 71%, cause-specific survival was 87%, progression-free survival was 60%, and local control was 80%, at 3 years. The 3-year overall survival was 79% for 85 stage IA patients treated with 48 Gy and 56% for 37 stage IB patients treated with 52 Gy (<it>p </it>= 0.05). At 3 years, cause-specific survival was 91% for the former group and 79% for the latter (<it>p </it>= 0.18), and progression-free survival was 62% versus 54% (<it>p </it>= 0.30). The 3-year local control rate was 81% versus 74% (<it>p </it>= 0.35). The cumulative incidence of grade 2 or 3 radiation pneumonitis was 11% in stage IA patients and 30% in stage IB patients (<it>p </it>= 0.02).</p> <p>Conclusions</p> <p>There was no difference in local control between stage IA and IB tumors despite the difference in tumor size. The benefit of increasing the SBRT dose for larger tumors should be investigated further.</p

Guaranteed optimal reachability control of reaction-diffusion equations using one-sided Lipschitz constants and model reduction

We show that, for any spatially discretized system of reaction-diffusion, the approximate solution given by the explicit Euler time-discretization scheme converges to the exact time-continuous solution, provided that diffusion coefficient be sufficiently large. By "sufficiently large", we mean that the diffusion coefficient value makes the one-sided Lipschitz constant of the reaction-diffusion system negative. We apply this result to solve a finite horizon control problem for a 1D reaction-diffusion example. We also explain how to perform model reduction in order to improve the efficiency of the method

Early-onset Dementia with Lewy Bodies

The clinical and neuropathological characteristics of an atypical form of dementia with Lewy bodies (DLB) are described. The proband experienced difficulties in her school performance at 13 years of age. Neurological examination revealed cognitive dysfunction, dysarthria, parkinsonism and myoclonus. By age 14 years, the symptoms had worsened markedly and the proband died at age 15 years. On neuropathological examination, the brain was severely atrophic. Numerous intracytoplasmic and intraneuritic Lewy bodies, as well as Lewy neurites, were present throughout the cerebral cortex and subcortical nuclel; vacuolar changes were seen in the upper layers of the neocortex and severe neuronal loss and gliosis were evident in the cerebral cortex and substantia nigra. Lewy bodies and Lewy neurites were strongly immunoreactive for alpha-synuclein and ubiquitin. Lewy bodies were composed of filamentous and granular material and isolated filaments were decorated by alpha-synuclein antibodies. Immunohistochemistry for tau or beta-amyloid yielded negative results. The etiology of this atypical form of DLB is unknown, since there was no family history and since sequencing of the exonic regions of alpha-Synuclein, beta-Synuclein, Synphilin-1, Parkin, Ubiquitin C-terminal hydrolase L1 and Neurofilament-M failed to reveal a pathogenic mutation. This study provides further evidence of the clinical and pathological heterogeneity of DLB