27,416 research outputs found

    ANALISA PEMANFAATAN POTENSI AIR HUJAN MENGGUNAKAN CISTERN SEBAGAI ALTERNATIF SUMBER AIR KEBUTUHAN PADA KOMPLEK GEDUNG BALAI LATIHAN KERJA SAMARINDA

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    Kebutuhan air perkotaan semakin besar akibat dari peningkatan jumlah penduduk dan perubahan fungsi lahan menyebabkan tidak adanya lagi lahan penyerapan air hujan sehingga limpasan air hujan meningkat. Selama ini di Komplek Gedung Balai Latihan Kerja Samarinda, air hujan yang melimpas hanya dialirkan ke saluran pembuangan untuk kemudian dibuang ke saluran perkotaan. Untuk mencegah hal tersebut maka perlu dilakukan upaya konservasi air. Metode panen air hujan dengan Cistern merupakan salah satu upaya konservasi air tersebut, dimana studi analisa ini adalah untuk menghitung banyaknya air yang dapat ditampung guna untuk memenuhi kebutuhan air bulanan dan merencanakan kontruksi cistern guna menampung air hujan untuk kebutuhan air. Serta mengetahui anggaran biaya untuk pembuatan cistern di Komplek Gedung Balai Latihan Kerja Samarinda. Dalam perencanaan ini yang dilakukan adalah dengan memanfaatkan potensi air hujan sebagai alternatif sumber air kebutuhan yang ada pada gedung Komplek Balai Latihan Kerja Samarinda. Dengan menggunakan metode Cistern, air hujan yang jatuh pada luasan atap gedung Balai Latihan Kerja Samarinda akan tertahan di dalam wadah penampung yang berupa Cistern dapat dihitung untuk selanjutnya dimanfaatkan sebagai alternatif sumber air dalam memenuhi kebutuhan air pada gedung Komplek Balai Latihan Kerja Samarinda. Desain Cistern sendiri memiliki kapasitas masing-masing 35.000 Liter, 25.000 Liter, dan 10.000 Liter sejumlah 1 (satu) buah, dan cistern dengan kapasitas 15.000 Liter sejumlah 3 (tiga) buah, serta bangunan pengolah setiap bangunan Cistern dibangun dengan ukuran setengah dari ukuran Cistern tersebut. Biaya total investasi awal adalah sebesar Rp. 373.704.000,00 dengan lama pengembalian investasi selama 15 tahun 3 bulan. Pemanfaatan air hujan memiliki dua keuntungan, yaitu keuntungan finansial berupa penghematan pengeluaran sebesar Rp. 24.157.116,00 setiap tahun, dan keuntungan dari segi lingkungan adalah dengan hujan sebagai sumber daya air maka pemanfaatan air hujan ini dapat memberi nilai tambah terhadap upaya konservasi sumber daya air. Kata Kunci : Cistern, Kebutuhan Air, Konservasi Air, Panen Air Huja

    Converting rain into drinking water: Quality issues and technological advances

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    With growing pressures on water supplies worldwide, rainwater harvesting is increasingly seen as a viable option to provide drinking water to an ever expanding population, particularly in developing countries. However, rooftop runoff is not without quality issues. Microbiological and chemical contamination have been detected in several studies, well above local and international guidelines, posing a health risk for consumers. Our research explores the use of silver ions, combined with conventional filtration and settling mechanisms, as a safe and affordable model for purification that can be applied on a small scale. The complete systems were installed and tested in rural communities in a Mexican semi-arid region. Efficiencies up to 99.9% were achieved in the removal of indicator microorganisms, with a marked exception where cross-contamination from external seepage occurs. Sites without overhanging branches or with relatively clean surfaces show an absence of total coliforms in the untreated runoff, compared with others where values as high as 1,650 CFU/100 ml were recorded. Thus, given adequate maintenance, the system can successfully deliver high quality drinking water, even when storage is required for long periods of time. © IWA Publishing 2011

    A newly discovered late Punic-Roman rock-cut tomb at Limestone Heritage, Siggiewi (Malta)

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    At Siggiewi, in the area known as Ta' Zagi, situated at a short distance from and overlooking Wied Xkora is a recently discovered rock-cut tomb which was at some point in its history refashioned into a water cistern (GR 49738/67965) (Fig. 1). The tomb is located within the grounds of the Limestone Heritage park, and was recently integrated in the cultural itinerary of its visitors. A request for the study of the tomb was made by Mr Emanuel Baldacchino, the Managing Director of Limestone Heritage, to one of us (NCV). A survey of the tomb was carried out and a set of drawings were produced by the other one of us (MS) (Fig. 2). The aim of this short contribution is to present the results of the survey.peer-reviewe

    Economically viable domestic roofwater harvesting

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    Economically viable domestic roofwater harvestin

    A "synaptoplasmic cistern" mediates rapid inhibition of cochlear hair cells

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    Cochlear hair cells are inhibited by cholinergic efferent neurons. The acetylcholine (ACh) receptor of the hair cell is a ligand-gated cation channel through which calcium enters to activate potassium channels and hyperpolarize the cell. It has been proposed that calcium-induced calcium release (CICR) from a near-membrane postsynaptic store supplements this process. Here, we demonstrate expression of type I ryanodine receptors in outer hair cells in the apical turn of the rat cochlea. Consistent with this finding, ryanodine and other store-active compounds alter the amplitude of transient currents produced by synaptic release of ACh, as well as the response of the hair cell to exogenous ACh. Like the sarcoplasmic reticulum of muscle, the "synaptoplasmic" cistern of the hair cell efficiently couples synaptic input to CICR.Fil: Lioudyno, Maria. Johns Hopkins University School of Medicine; Estados UnidosFil: Hiel, Hakim. Johns Hopkins University School of Medicine; Estados UnidosFil: Kong, Jee-Hyun. Johns Hopkins University School of Medicine; Estados UnidosFil: Katz, Eleonora. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaFil: Waldman, Erik. Johns Hopkins University School of Medicine; Estados UnidosFil: Parameshwaran Iyer, Suchitra. Johns Hopkins University School of Medicine; Estados UnidosFil: Glowatzki, Elisabeth. Johns Hopkins University School of Medicine; Estados UnidosFil: Fuchs, Paul A.. Johns Hopkins University School of Medicine; Estados Unido

    Low Impact Storm Water Management Projects at the University of New Hampshire

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    The University of New Hampshire has become increasingly concerned with storm water management on the Durham campus. Due to Federal regulations many regional municipalities are feeling pressure to enhance and increase management of storm water to reduce impacts to surface waters. The specific objective of this proposal is to demonstrate reductions in the discharge of storm water runoff from UNH-Durham campus properties. The construction and use of three Low Impact Development (LID) integrated management systems on UNH property will help UNH and the UNH Stormwater Center to champion innovative approaches in the state and region for reducing storm water runoff and improving the health of coastal watershed areas

    The paediatric suprasellar cistern as an important CT review area

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    Pathology affecting the suprasellar cistern is varied in paediatric neuroradiology practice. Although MRI is the imaging modality of choice for lesions of the suprasellar cistern, abnormalities can be detected on CT with knowledge of the normal anatomy and a sound approach to the possible pathological entities. We present our approach to pathology affecting the suprasellar cistern and highlight this using various cases seen at our institution in the recent past

    Late archaic to late antique finds from cistern no. 1 at Thorikos

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