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Academic literature on the topic 'Chr.-900 v'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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Journal articles on the topic "Chr.-900 v"

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Sudhaus, Dirk, and Arne Friedmann. "Holocene Vegetation and Land Use History in the Northern Vosges (France)." E&G Quaternary Science Journal 64, no. 2 (November 18, 2015): 55–66. http://dx.doi.org/10.3285/eg.64.2.01.

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Abstract. Für das in den Nordvogesen liegende Moor Rond Pertuis supérieure wurde ein mit der 14C-Methode datiertes Pollenprofil erstellt. Das Profil umfasst einen Zeitraum vom mittleren Atlantikum (4500–3100 Jahre v. Chr.) bis heute. Während der Mitte des Atlantikums bedeckte ein kiefernreicher Eichenmischwald die Nordvogesen. Tanne und Buche wanderten am Ende des Atlantikums ein und führten zu einem Rückgang des Eichen- und Kiefernwaldes. Zu dieser Zeit begann auch der maßgebliche menschliche Einfluss in die Vegetationsentwicklung. Fünf Landnutzungsphasen konnten differenziert werden, die Erste am Ende des Neolithikums (~4000–2200 v. Chr.). Von der Bonzezeit an (2200–800 v. Chr.) bis in heutige Zeit ist eine kontinuierliche Landnutzung nachweisbar. Im Spätmittelalter (900–1500 n. Chr.) und der Neuzeit (1500 n. Chr. bis heute) haben sich die Wälder durch die Nutzung vollständig verändert. Im 19. Jahrhundert ist die Fichte in das Untersuchungsgebiet in den Nordvogesen eingeführt worden. In der Mitte des 20. Jahrhunderts wurde die Fichtenaufforstung forciert.

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De Ceunynck, Rudolf. "The Evolution of the Coastal Dunes in the Western Belgian Coastal Plain." E&G Quaternary Science Journal 35, no. 1 (January 1, 1985): 33–42. http://dx.doi.org/10.3285/eg.35.1.07.

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Abstract. Zwei Hauptdünengebiete kommen im Gebiet westlich von Nieuwpoort vor: die Jüngeren Dünen entlang der heutigen Küstenlinie sowie die Älteren Dünen, die in der Nähe der französischen Grenze isoliert in der Küstenebene auftreten und ebenfalls küstenparallel verlaufen. Beide Systeme wurden geologisch und paläontologisch untersucht. Es wird vermutet, daß das Ältere Dünensystem in der Zeit vor 4300 v. h. entstanden ist. Ein Streifen weiterer älterer Dünensedimente (der jedoch nicht so alt wie das Ältere Dünensystem ist) wurde, ebenfalls nahe der französischen Grenze, unter den Jüngeren Dünen gefunden. Das Alter dieser Sedimente liegt zwischen 2800 und 900 v. h. Bei der Entstehung der Jüngeren Dünen wurden zwei Subphasen unterschieden. Vor dem 14. Jahrhundert bildete das Dünengebiet eine relativ ebene Fläche. Ihre Entstehung markiert das Ende einer aktiven äolischen Phase, die im 11. Jahrhundert n. Chr. wahrscheinlich als Folge damals verstärkt auftretender Sturmfluten einsetzte (Dunkerque-3 Transgression). Mit dem Ende des 14. Jahrhunderts begannen sich große Sicheldünen zu bilden, die Teile der früheren Landoberfläche begruben. Einige von ihnen bewegen sich noch heute. Die Entwicklung des Jüngeren Dünengebietes bei De Panne wird eingehend beschrieben, einschließlich der Vegetationsgeschichte des Dünengebietes und der anschließenden Küstenebene. Einige Aufmerksamkeit wird auch der Lage früherer Küstenlinien gewidmet.

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Birch, R., S. Chawla, J. Nemunaitis, P. Savage, P. Kaiser, A. Spira, A. Cervera, et al. "Perifosine (P) as an active agent in the treatment of patients with advanced sarcoma." Journal of Clinical Oncology 25, no. 18_suppl (June 20, 2007): 10059. http://dx.doi.org/10.1200/jco.2007.25.18_suppl.10059.

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10059 Background: Clinical benefit rate (CBR), defined as complete or partial responses (RECIST) or stable disease > 4 months, has been taken as evidence for the activity of mTOR inhibitors in sarcomas, (Chawla ASCO 2006). P is a novel oral alkylphosphocholine that targets the PI3K pathway upstream from mTOR by inhibiting the phosphorylation of Akt. (Kondapaka, Mol Cancer Ther 2003). P's activity against sarcomas has now been evaluated in 121 patients enrolled in one of 3 phase (ph) I trials or 4 ph II studies. Five of these studies have been published. All of the data are in the Keryx database from which this analysis was performed. Methods: Dose-schedules in the ph I trials were weekly (wkly) 100–800 mg; loading dose (LD) 300 - 1,800 following by daily (d) 50 - 21 every 21 days; LD 400 - 900 & d 50 - 100 continuously. In the ph II trials doses were LD 900 & d 150 every 21 days, LD 900 and d 100 continuously, d 50 mg continuously; wkly 900, wkly1200 & wkly 1,500. Regimens that included a wkly or LD of 1,200 mg or more or a d dose of ≥ 150 mg were more toxic and are defined as “higher dose” for this analysis. Results: 121 pts with sarcoma were entered on studies prior to 9/1/2006 and could be assessed for CBR. CBR is shown in the table below. Toxicities were mainly gastrointestinal and/or fatigue. The percentage of pts with grade 0 nausea (N), vomiting (V), diarrhea (D) and fatigue (F) for lower dose P was 40, 60, 45 and 57% respectively compared to 29, 38, 24 and 66% for higher dose P. The proportion of patients with grade 2+ N, V, D and F was 19, 15, 17 and 21% for lower dose P and 46, 31, 40 and 21% for higher dose P. Conclusions: In the ph I/II studies of P the CBR was 50%. This compares favorably with the activity of the mTOR inhibitors. There was no suggestion of greater activity in those given higher doses of P, but there was substantially more toxicity and greater earlier withdrawal from therapy with the higher doses. [Table: see text] No significant financial relationships to disclose.

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Ishikura, Kenji, Hiroshi Hataya, Masahiro Ikeda, and Masataka Honda. "Suitable Dialytic Indicators for Pediatric Peritoneal Dialysis Patients: The Alternative to Creatinine Clearance." Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis 23, no. 3 (May 2003): 270–75. http://dx.doi.org/10.1177/089686080302300310.

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← Objective Owing to the discord between body weight and body surface area (BSA), creatinine clearance (CCr) is predisposed to be small in pediatric patients on peritoneal dialysis (PD). Alternatively, Kt/V creatinine (Kt/V creat), which is normalized to total body water (TBW) rather than BSA, could be a better dialytic indicator. In this study, the efficiency of dialysis and the nutritional status of pediatric patients on chronic PD were examined, and the utility of dialytic indicators was evaluated. ← Patients and Methods 49 patients under 20 years old, in stable condition, and on PD were analyzed. Weekly total Kt/V of urea (Kt/V urea), CCr, Kt/V creat, and normalized protein equivalent of nitrogen appearance (nPNA) were measured for all patients and for patients under 6 years old. The target value was 2.0/week for Kt/V urea and 60 L/week/1.73 m2 for CCr, as recommended by the Kidney Disease Outcomes Quality Initiative guidelines. The target value for Kt/V creat was set as 1.52/week, using a male model with a height of 170 cm and a body weight of 65 kg. ← Results The mean values of delivered Kt/V urea, CCr, Kt/V creat, and nPNA (and proportion of patients that achieved each target value) for all patients were 2.25 ± 0.57/week (67.4%), 53.8 ± 19.3 L/week/1.73 2m (26.5%), 1.83 ± 0.73/week (65.3%), and 1.11 ± 0.42 g/day, respectively. The values for patients under 6 years old were 2.38± 0.26/week (90.0%), 45.9 ± 12.8 L/week/1.73 2m (10.0%), 1.94 ± 0.51/week (90.0%), and 1.52 ± 0.67 g/day, respectively. Stepwise multiple regression analyses revealed that the relationship between CCr and Kt/V urea was affected by the patient's age. ← Conclusions Our pediatric patients achieved the recommended target value of Kt/V urea. At the same time, the nPNA results reflected the patient's status well. However, CCr appeared to be inappropriate as an indicator for patients under 6 years old. Kt/V creat is suggested to be a better dialytic indicator for these patients.

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Marušáková, Daniela, Jan Berka, and Petr Sajdl. "Testování mechanických vlastností Inconelu 713 a 738 pro pokročilé reaktory." Koroze a ochrana materialu 59, no. 4 (December 1, 2015): 103–6. http://dx.doi.org/10.1515/kom-2015-0021.

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Abstract Mezi kovové konstrukční materiály pro komponenty pokročilých plynem chlazených reaktorů patří niklové superslitiny Inconel 713 a 738. V rámci projektu aplikovaného výzkumu řešeného na VŠCHT Praha a CV Řež byly testovány mechanické vlastnosti těchto slitin ve výchozím stavu a po expozici vzorků v heliu obsahujícím stopové nečistoty (CO, H2, CH4, H2O) při teplotě 900 °C po dobu 1000 hod. Vzorky testovaných slitin byly vyrobeny: a) z původního litého materiálu (virgin), b) přepracovaného materiálu z výroby (revert 100R) a c) materiálu získaného slitím těchto materiálů v poměru 50V/50R. K určení mechanických vlastností materiálů po expozicích byly provedeny tahové zkoušky a strukturní analýza pomocí SEM. Porovnány byly změny vlastností po expozici jednotlivých testovaných slitin i stejné slitiny vyrobené různými postupy. Zatímco mez kluzu a mez pevnosti poklesly u Inconelu 713 jen zlehka, u Inconelu 738 poklesly výrazně. Stav 50V/50R vykazoval lepší mechanické vlastnosti než stav revert 100R.

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Chambliss, C. R., and R. L. Walker. "ST Carinae, An Algol-Type System in a Possible State of Rapid Mass Exchange." International Astronomical Union Colloquium 107 (1989): 335. http://dx.doi.org/10.1017/s0252921100087935.

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ST Carinae is an eclipsing binary with a period of 0.90165 days and is believed to consist of an A0 V primary and a secondary of type F5 - 8 IV. About 900 observations in UBV, made by Somerville in 1963, but unreduced at that time, are analyzed with the Wood Model. These are also compared with the solutions obtained by previous investigators of this system. The solutions indicate a reasonably consistent geometry, but there is still substantial uncertainty with regard to the mass-ratio and dynamical status of the system. The possibility exists that ST CAR is in the initial and rapid stage of mass exchange in which the primary component fills its Roche lobe and is losing mass to its companion. The two components of ST CAR appear to be of normal dimensions, but additional work is needed to clarify the exact status of this system. It is planned that a re-analysis using the Simplex program will clarify the dynamical status of ST CAR.

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Čejka, Jiří, Zdeněk Sobalík, and Bohdan Kříbek. "Laboratory Oxidation of Fossil Organic Matter Studiedby in situ Infrared Spectroscopy, Rock-Eval Pyrolysis and Pyrolysis-Gas Chromatography-Mass Spectrometry." Collection of Czechoslovak Chemical Communications 62, no. 2 (1997): 364–74. http://dx.doi.org/10.1135/cccc19970364.

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Fossil organic matter in Miocene and Silurian sediments was subjected to experimental oxidation, which was investigated by Rock-Eval pyrolysis, the "off-line" pyrolysis-gas chromatography-mass spectrometry combination, and continuous FTIR monitoring. The pyrolysate yield decreased during the oxidation particularly in the low-matured, predominantly aliphatic organic matter from the Miocene sediments (type I kerogen, algae-type kerogen). This suggests that aliphatic chains are preferentially oxidized, which is in agreement with the marked decrease in the intensity of the v(CH2) and v(CH3) IR bands. The n-alkane distribution in the chromatographic profile was unaffected by the oxidation; hence, the oxidation of the alkane chains was not selective. At the same time, the bands within the 1 900-1 550 cm-1 range grew in intensity for both the aliphatic and mixed-type (type II kerogen) organic matter. The oxidation of the aromatic (humic) type of organic fossil matter in the Miocene sediments (type III kerogen, coal-type kerogen) was only accompanied by very small changes in the FTIR spectra. The results of the "of-line" pyrolysis are consistent with those of the Rock-Eval pyrolysis. For all samples, the oxidation was accompanied by a gradual decrease in the hydrogen index (HI) as well as in the pyrolysis temperature maximum (Tmax). The changes in the S2/S1 ratio ("bound"-to-"free" hydrocarbons) indicate that the "free" hydrocarbons in the rocks are preferentially oxidized during the first 8-16 h of the experimental run. Subsequently, hydrocarbon chains involved in the kerogen macromolecule are attacked.

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Dermawan, Rizki Kurnia, Rif'an Fathoni, and Anton Irawan. "Pengaruh Komposisi Massa Bahan Baku dan Temperatur pada Steam Reformer terhadap Jumlah Produksi Bio-Hydrogen dengan Menggunakan Software ASPEN HYSYS V.10.0." Jurnal Chemurgy 2, no. 1 (October 15, 2018): 24. http://dx.doi.org/10.30872/cmg.v2i1.1634.

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Proses pada pabrik bio hidrogen dari bio oil terbagi menjadi beberapa unit, yaitu unit dehidrooksigenasi, unit pemisahan, unit steam reforming, unit water gas shift, dan unit pemurnian. Penelitian ini menjelaskan tentangpengaruh perbandingan komposisi massa metana (CH4) dengan steam (H2O) serta pengaruh perbedaan temperatur pada unit steam methane reforming untuk melihat pengaruh pada produksi bio hidrogen. Penelitian ini dikerjakan menggunakan software simulasi proses Aspen Hysys v.10.0. Dengan menggunakan variabel temperatur pada steam reformer (800 °C, 850 °C, 900 °C, 950 °C, 1000 °C) dan variabel perbandingan komposisi massa steam dengan methane (CH4), yaitu 1:2, 1:1,25, 1:3, 1:3,5, 1:4. Dari penelitian yang dilakukan didapatkan pengaruh komposisi steam dan metana berbanding lurus dengan jumlah bio hidrogen yang dihasilkan. Serta, pengaruh perbedaan temperatur pada reaktor steam reformer berbanding lurus dengan jumlah produksi hidrogen. Dari hasil penelitian didapatkan jumlah produksi bio hidrogen terbaik 1300 kg/jam.Kata kunci: Aspen HYSYS, Bio Oil, Bio Hidrogen

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Hutchinson, Harry. "Zapping the Record." Mechanical Engineering 126, no. 12 (December 1, 2004): 48–49. http://dx.doi.org/10.1115/1.2004-dec-6.

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The Buckeye Bullet, a student project at Ohio State University, is the first electric car to exceed 300 mph. It set a new US record of 315 mph at the Bonneville Salt Flats. The vehicle is 10 meters long and is powered by a 250-kW motor supplied by a 900 V battery system. The new record holder, the Buckeye Bullet, travelled 272 mph over the Bonneville Salt Flats on one desert-bright October day. Later in the same week, it was clocked at 315 mph for a new U.S. record. According to Dan Warner, the association representative who certified the times, the international record allows unlimited run-up distance and then times the vehicle through a flying mile. The record is based on the vehicle’s best average time in both directions over the same mile.

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Escudero, María José, María Pilar Yeste, Miguel Ángel Cauqui, and Miguel Ángel Muñoz. "Performance of a Direct Methane Solid Oxide Fuel Cell Using Nickel-Ceria-Yttria Stabilized Zirconia as the Anode." Materials 13, no. 3 (January 28, 2020): 599. http://dx.doi.org/10.3390/ma13030599.

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A nickel-ceria-yttria stabilized zirconia (Ni-CYSZ) cermet material was synthesized and tested as the anode for the direct oxidation of methane in a solid oxide fuel cell (SOFC) with YSZ as the electrolyte and strontium-doped lanthanum manganite (LSM) as the cathode. Initially, the electrochemical behavior was investigated under several load demands in wet (3% H2O) CH4 at 850 °C during 144 h using I-V curves, impedance spectra, and potentiostatic measurements. Long-term tests were subsequently conducted under 180 mA·cm–2 in wet CH4 for 236 h and dry CH4 for 526 h at 850 °C in order to assess the cell stability. Material analysis was carried out by SEM-EDS after operation was complete. Similar cell performance was observed with wet (3% H2O) and dry CH4, and this indicates that the presence of water is not relevant under the applied load demand. Impedance spectra of the cell showed that at least three processes govern the direct electrochemical oxidation of methane on the Ni-CYSZ anode and these are related to charge transfer at high frequency, the adsorption/desorption of charged species at medium frequency and the non-charge transfer processes at low frequency. The cell was operated for more than 900 h in CH4 and 806 h under load demand, with a low degradation rate of ~0.2 mV·h–1 observed during this period. The low degradation in performance was mainly caused by the increase in charge transfer resistance, which can be attributed to carbon deposition on the anode causing a reduction in the number of active centers. Carbon deposits were detected mostly on the surface of Ni particles but not near the anode/electrolyte interface or the cerium surface. Therefore, the incorporation of cerium in the anode structure could improve the cell lifetime by reducing carbon formation.

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Dissertations / Theses on the topic "Chr.-900 v"

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Wagner-Durand, Elisabeth [Verfasser], and Marlies [Akademischer Betreuer] Heinz. "Bilder im Kulturvergleich - Vorkommen und Verwendung von Bildern in verschiedenen Gesellschaften des Orients und Okzidents im 1. Jtd. v. Chr. (900-450 v. Chr.)." Freiburg : Universität, 2009. http://d-nb.info/1123480583/34.

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Marquardt, Peggy [Verfasser]. "Römische Kriegsfinanzierung 280 - 88 v. Chr. / Peggy Marquardt." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1160515859/34.

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Bounas, Thomas [Verfasser]. "Die Kriegsrechtfertigung in der attischen Rhetorik des 4. Jh. v. Chr. / Thomas Bounas." Frankfurt : Peter Lang GmbH, Internationaler Verlag der Wissenschaften, 2016. http://d-nb.info/1099858607/34.

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Bitterer, Tobias [Verfasser], and Rolf Michael [Akademischer Betreuer] Schneider. "Marmorverkleidung stadtrömischer Architektur : öffentliche Bauten aus dem 1. Jahrhundert v. Chr. bis 7. Jahrhundert n. Chr. / Tobias Bitterer. Betreuer: Rolf Michael Schneider." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2010. http://d-nb.info/1031380612/34.

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Pachowiak, Nikolaus [Verfasser]. "Inimici Caesaris : Die Feinde Caesars und der Ausbruch des Bürgerkrieges (49 v. Chr.) / Nikolaus Pachowiak." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1170815057/34.

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Sommer, Klaus Georg [Verfasser], and Michael [Akademischer Betreuer] Roaf. "Der 21. Januar 1192 v. Chr. : der Untergang Ugarits? / Klaus Georg Sommer. Betreuer: Michael Roaf." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1105373789/34.

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Lienhard, Demian [Verfasser], Michael [Gutachter] Heinzelmann, Dietrich [Gutachter] Boschung, and Walter [Gutachter] Ameling. "Römische fora in Italien. Funktionen und Funktionswandel öffentlicher Platzanlagen vom 3. Jhdt. v. Chr. bis ins 5. Jhdt. n. Chr. / Demian Lienhard ; Gutachter: Michael Heinzelmann, Dietrich Boschung, Walter Ameling." Köln : Universitäts- und Stadtbibliothek Köln, 2017. http://d-nb.info/1210642743/34.

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Must, Thomas [Verfasser]. "Präventivkriege und Sicherheitspolitik : Bestimmende Motive römischer Außenpolitik zwischen 171 und 133 v. Chr. / Thomas Must." Aachen : Shaker, 2018. http://d-nb.info/1188548824/34.

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Qader, Asoss M. [Verfasser], and Gernot [Gutachter] Wilhelm. "Arrapḫa (Kirkuk) von den Anfängen bis 1340 v. Chr. nach keilschriftlichen Quellen / Asoss M. Qader. Gutachter: Gernot Wilhelm." Würzburg : Universität Würzburg, 2016. http://d-nb.info/1111887381/34.

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Reichert, Melanie. "Malta im phönizischen Handelsnetzwerk zwischen 1000 und 500 v. Chr. Einflüsse auf das Keramikrepertoire und die Kleinfunde." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/22912.

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Malta hat in der Geschichte durch seine günstige Lage mitten im Mittelmeer eine bedeutende Rolle bespielt. Die Phönizier, ein Seefahrervolk, das ursprünglich von der heutigen Libanonküste stammt, haben die Insel für ihre Zwecke strategisch und wirtschaftlich genutzt. Diese Dissertation beschäftigt sich mit der phönizischen Epoche auf Malta. Im Besonderen wird der Zeitraum zwischen 1000 und 500 v. Chr. untersucht. Die Arbeit fokussiert sich auf das Keramikrepertoire und die Kleinfunde, die in den Zeitraum eingeordnet werden. Das erste Kapitel befasst sich mit der aktuellen Forschungsliteratur rund um die Phönizier. Identität, Sprache und Herkunft der Bewohner der heutigen Libanonküste stehen hierbei besonders im Vordergrund. Das darauffolgende Kapitel leitet zur aktuellen Forschungsgeschichte zu den Phöniziern auf Malta über. Fragen nach der Chronologie, des Keramikrepertoires, des Heiligtums Tas-Silġ und nach der einstigen phönizischen Siedlung werden unter anderem behandelt. Der Hauptteil der Studie befasst sich mit der systematischen Bearbeitung der Keramik und der Kleinfunde. Eine Formenanalyse von jeder Form wird sowohl bei der Keramik als auch bei den Kleinfunden durchgeführt. Insgesamt wurden 680 Objekte in der Studie untersucht. 554 Keramikobjekte und 126 Kleinfunde. Der Schlussteil befasst sich mit den Ergebnissen der Studie. Insbesondere wird die Hypothese hervorgehoben, die besagt, dass ein „Inselnetzwerk“ zwischen den Phöniziern geknüpft wurde, die schon früh Sizilien, Sardinien, Nordafrika und Malta besiedelten. Um diese These besser zu belegen, werden Vergleichsmodelle zu Handelsnetzwerken aus der Antike und aus dem Mittelalter herangezogen.
Malta played an important role in history because of its specific location right in the middle of the Mediterranean Sea. The Phoenicians, a seafaring nation who is originated at today’s Lebanon coast, did use the island for strategic and economic purpose. That dissertation deals with the Phoenician epoch on Malta. In special analyzing focus stands the period between 1000 and 500 B.C. The study focuses the ceramic repertoire and the small finds which are classified into that period. The first chapter consider the current research literature concerning the Phoenicians. Identity, language and the origin of the inhabitants of the nowadays Lebanon coast are in special interest. The next chapter is leading to the research literature concerning the Phoenicians on Malta. Amongst others it deals with questions about chronology, the ceramic repertoire, the sanctuary of Tas-Silġ and the erstwhile phoenician settlement. The main chapter of this study considers a systematic analysis of the ceramic and the small finds. An analysis of every specific shape of the ceramic items and the small finds is made. 680 objects have been observed in total. 554 ceramic objects and 126 small finds. The last chapter deals with the results of the study. Especially emphasized is the hypothesis, that the early phoenician settlers were creating an “island-network” between Sicily, Sardinia, North Africa and Malta. For proving this thesis much better, comparison models were used which comes from the antiquity and from the middle ages.

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Books on the topic "Chr.-900 v"

1

Bernal, Martin. Cadmean letters: The transmission of the alphabet to the Aegean and further west before 1400 B.C. Winona Lake [IN]: Eisenbrauns, 1990.

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Michael, Schmidt. Europa und der Mittelmeerraum zu Zeiten der frühen Kelten und Germanen (von um 900 v. Chr. bis 16 v. Chr.). Frankfurt: Artaunon-Verlag, 2003.

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Levy, Dore Jesse. Chinese narrative poetry: The late Han through Tʻang dynasties. Durham [N.C.]: Duke University Press, 1988.

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Der Beginn des Juden- und Christentums: (die Geburt des Monotheismus ; von um 9000 v. Chr. bis um 600 n. Chr.). Frankfurt: Artaunon-Verlag, 2006.

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Europa und der Mittelmeerraum vor den Kelten: Die Kupfer- und Bronzezeit in Europa, Vorderasien und Nordafrika (von ca. 9000 v. Chr. bis um 650 v. Chr.). Frankfurt/Main: Artaunon-Verlag, 2003.

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Book chapters on the topic "Chr.-900 v"

1

Chaniotis, Angelos. "3. Die Einwanderung der griechischen Stämme (ca. 1450–900 v. Chr.)." In Das antike Kreta, 35–48. C.H.Beck, 2014. http://dx.doi.org/10.17104/9783406673290-35.

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Chaniotis, Angelos. "4. Brücke zwischen Orient und Hellas: Die kretische Renaissance (ca. 900–630 v. Chr.)." In Das antike Kreta, 48–58. C.H.Beck, 2014. http://dx.doi.org/10.17104/9783406673290-48.

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Mukherjee, Proshikshya. "LEACH-VD." In Advances in Wireless Technologies and Telecommunication, 77–85. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9004-0.ch005.

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Wireless sensor networks act as an important role in the wireless communication area because of its properties, its intelligence, cheaper costs, and its smaller size. Multiple nodes are required for coperative communication, the low energy adaptive clustering hierarchy and LEACH-Vector Quantization are used for cluster and active cluster headformation. Further, Dijkstra Algorithm is used to find the shortest path between the active CHs and high-energy utilization, respectively. The main issue of inter-cluster communication is carried out in earlier work using LEACH and LEACH-V protocols. The chapter illustrates the LEACH-Vector Quantization Dijkstra protocol for shortest path active CH communication in a cooperative communication network. In the application point of view, LEACH-VD performs the lowest energy path. LEACH-V provides the intra-cluster communication between the cluster head, and using Dijkstra Algorithm, the minimum distance is calculated connecting the active cluster heads, which creates the shortest path results using an energy-efficient technique.

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Conference papers on the topic "Chr.-900 v"

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Tong, Timothy, Mohsen Abou-Ellail, Yuan Li, and Karam R. Beshay. "Numerical Computation of Reacting Flow in Porous Burners With an Extended CH4-Air Reaction Mechanism." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56012.

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The present paper presents, numerical computations for flow, heat transfer and chemical reactions in an axisymmetric inert porous burner. The porous media re-radiate the heat absorbed from the gaseous combustion products by convection and conduction. In the present work, the porous burner species mass fraction source terms are computed from an ‘extended’ reaction mechanism, controlled by chemical kinetics of elementary reactions. The porous burner has mingled zones of porous/nonporous reacting flow, i.e. the porosity is not uniform over the entire domain. Therefore, it has to be included inside the partial derivatives of the transport governing equations. Finite-difference equations are obtained by formal integration over control volumes surrounding each grid node. Up-wind differencing is used to insure that the influence coefficients are always positive to reflect the real effect of neighboring nodes on a typical central node. Finite-difference equations are solved, iteratively, for U, V, p’ (pressure correction), enthalpy and species mass fractions, utilizing a grid of (60×40) nodes. The sixty grid nodes in the axial direction are needed to resolve the detailed structure of the thin reaction zone inside the porous media. The porous burner uses a premixed CH4-air mixture, while its radiating characteristics are computed numerically, using a four-flux radiation model. Sixteen species are included, namely CH4, CH3, CH2, CH, CH2O, CHO, CO, CO2, O2, O, OH, H2, H, H2O, HO2, H2O2, involving 49 chemical reaction equations. It was found that 900 iterations are sufficient for complete conversion of the computed results with errors less than 0.1%. The computed temperature profiles of the gas and the solid show that, heat is conducted from downstream to the upstream of the reaction zone. Most stable species, such as H2O, CO2, H2, keep increasing inside the reaction zone staying appreciable in the combustion products. However, unstable products, such as HO2, H2O2 and CH3, first increase in the preheating region of the reaction zone, they are then consumed fast in the post-reaction zone of the porous burner. Therefore, it appears that their important function is only to help the chemical reactions continue to their inevitable completion of the more stable combustion products.

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Liu, Zengjie, and Lan Wang. "Wheel/Rail Dynamics Simulation for Optimising Minimum Grade Lengths to High-Speed Railways." In ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/jrc/ice2007-40107.

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Based on the principle of no car vibrations interference when trains pass grade section from the end of front vertical curve to the start of latter vertical curve, using railway wheel/rail simulation NUCARS™ software, some dynamics simulation studies for minimum grade lengths on high speed railway lines were made. The dynamics simulation results show that, the minimum tangent lengths between vertical transition curves should be more than 0.43V in meters (V is speed of train, km/h). So the minimum length is 800 meters when the vertical curve radius is 25000 meters, and 900 meters when radius is 30000 meters for the Chinese Dedicated Passenger Railway lines (PDLs) on which maximum speed is 350 km/h and ruling gradient is 12‰.

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3

Kim, Sung Joong, Tom McKrell, Jacopo Buongiorno, and Lin-Wen Hu. "Experimental Study of Flow Critical Heat Flux in Low Concentration Water-Based Nanofluids." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52321.

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Nanofluids are known as dispersions of nano-scale particles in solvents. Recent reviews of pool boiling experiments using nanofluids have shown that they have greatly enhanced critical heat flux (CHF). In many practical heat transfer applications, however, it is flow boiling that is of particular importance. Therefore, an experimental study was performed to verify whether or not a nanofluid can indeed enhance the CHF in the flow boiling condition. The nanofluid used in this work was a dispersion of aluminum oxide particles in water at very low concentration (≤0.1 v%). CHF was measured in a flow loop with a stainless steel grade 316 tubular test section of 5.54 mm inner diameter and 100 mm long. The test section was designed to provide a maximum heat flux of about 9.0 MW/m2, delivered by two direct current power supplies connected in parallel. More than 40 tests were conducted at three different mass fluxes of 1,500, 2,000, and 2,500 kg/m2sec while the fluid outlet temperature was limited not to exceed the saturation temperature at 0.1 MPa. The experimental results show that the CHF could be enhanced by as much as 45%. Additionally, surface inspection using Scanning Electron Microscopy reveals that the surface morphology of the test heater has been altered during the nanofluid boiling, which, in turn, provides valuable clues for explaining the CHF enhancement.

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