Search results for "forest"
showing 10 items of 3780 documents
Die Bestimmung von Molybdän im Most und Wein X. Mitteilung
1961
Zur Bestimmung von Molybdanspuren im Most und Wein wird ein modifiziertes Rhodanidverfahren empfohlen. Seine Leistungsfahigkeit wird gezeigt.
Production altitude and time delays of the terrestrial gamma flashes: Revisiting the Burst and Transient Source Experiment spectra
2008
[1] On the basis of the RHESSI results it has been suggested that terrestrial gamma flashes (TGFs) are produced at very low altitudes. On the other hand some of the Burst and Transient Source Experiment (BATSE) spectra show unabsorbed fluxes of X rays in the 25–50 keV energy range, indicating a higher production altitude. To investigate this, we have developed a Monte Carlo code for X-ray propagation through the atmosphere. The most important features seen in the modeled spectra are (1) a low-energy cutoff which moves to lower energies as TGFs are produced at higher altitudes, (2) a high-energy cutoff which moves to lower energies as TGFs are observed at larger zenith angles, and (3) time d…
Collocated measurements of boundary layer cloud microphysical and radiative properties: A feasibility study
2010
[1] First data from collocated, helicopter-based measurements of boundary layer cloud microphysical properties (effective droplet radius Reff, droplet number concentration N) and spectral radiative quantities (cloud optical thickness τ, cloud top albedo ρ, reflectivity ) are presented. The in situ measurements of the microphysical cloud properties were collected by the Airborne Cloud Turbulence Observation System (ACTOS) attached to a helicopter by a 145 m long rope. Cloud spectral reflectivity was derived from radiances measured by grating spectrometers combined with downward looking optical inlets installed underneath the helicopter. Correlations between cloud microphysics and reflected r…
Reply to comment by R. Grard et al. on “An analysis of VLF electric field spectra measured in Titan's atmosphere by the Huygens probe”
2011
Testing the outflow theory of Malcherek by slit weir data
2018
Abstract In this paper the flow-process of a slit weir is analyzed by the outflow theory of Malcherek. Average flow velocity over the slit weir is expressed in terms of head over weir and the momentum correction coefficient. The theoretically deduced stage-discharge formula was then calibrated using experimental data obtained for a ratio between the weir and the channel width ranging from 0.05 to 0.25. The deduced stage–discharge relationship allows to measure discharge values characterized by errors which are, for 91% of the measured values, less than or equal to ± 5%.
Stima della potenza cinetica della precipitazione a partire da osservazioni disdrometriche di distribuzioni dimensionali delle gocce di pioggia
2011
Lo studio del distacco delle particelle di suolo operato dalla pioggia richiede la conoscenza delle caratteristiche erosive della precipitazione. Nella memoria, dopo aver richiamato i presupposti teorici della legge di Ulbrich e le espressioni della potenza cinetica da essa deducibili, viene presentata una verifica di applicabilita della suddetta distribuzione teorica sulla base delle distribuzioni dimensionali delle gocce di pioggia rilevate mediante un disdrometro ottico installato presso la sezione Idraulica del Dipartimento dei Sistemi Agro-Ambientali dell’Universita di Palermo. Viene proposta, infine, una verifica sperimentale dell’equazione di Wischmeier e Smith per il calcolo della p…
Tidal Type Determination on Manokwari Shipping Chanel by Using Admiralty Method
2018
Komponen pasang surut perairan sangat penting bagi kepentingan pelabuhan, transportasi laut, industri perikanan, rekayasa pantai dan mitigasi kawasan pesisir. Ketinggian pasang surut yang terbentuk merupakan superposisi dari amplitudo komponen pasang surut akibat gaya tarik gravitasi matahari, bulan dan bumi terhadap massa air lautan. Komponen pasang surut yaitu K1, O1, P1, S2, M2, K2, M4, MS4. Penelitian ini bertujuan menentukan komponen dan tipe pasang surut pada alur pelayaran Manokwari-Papua Barat menggunakan metode admiralty. Bilangan Formzahl yang diperoleh yaitu 0.732 yang berarti bahwa perairan memiliki pasang surut Campuran Condong ke Harian Ganda (mixed tide prevailing semidiurna…
Sea Water Quality Assessment Based on Tidal Condition in Sawaibu Bay Manokwari
2018
Pasar Sanggeng yang terletak di pesisir Teluk Doreri Kota Manokwari, menjadi salah satu pusat perdagangan yang melayani kebutuhan masyarakat. Secara umum dagangan di Pasar Sanggeng terdiri dari kebutuhan rumah tangga, jual beli sayur dan tempat penjualan ikan. Pasar tersebut merupakan jantung kota yang setiap hari dipenuhi masyarakat untuk berbelanja. Akibat adanya aktivitas yang tinggi tersebut menyebabkan pembungan sampah-sampah organik tidak terawasi atau terkontrol dengan baik. Sampah- sampah tersebut seperti sisa-sisa makanan, sayuran, buah-buahan dan sisa-sisa buangan ikan mentah dari tempat penjualan ikan. Kondisi ini berlangsung secara terus menerus setiap hari sehingga dapat menyeb…
Discussion of "preliminary Study of Surface Hydraulic Jumps" by S. Ahmed, Y. Ye, H. Liu, and N. Rajaratnam
2020
In this paper the results of Preliminary Study of Surface Hydraulic Jumps” by S. Ahmed, Y. Ye, H. Liu, and N. Rajaratnam are discussed