Refine
Year of publication
- 2009 (62) (remove)
Document Type
- Conference Proceeding (20)
- Article (unreviewed) (16)
- Part of a Book (7)
- Book (6)
- Article (reviewed) (5)
- Patent (3)
- Contribution to a Periodical (2)
- Periodical Part (1)
- Report (1)
- Study Thesis (1)
Conference Type
- Konferenzartikel (14)
- Konferenz-Poster (3)
- Sonstiges (3)
- Konferenz-Abstract (1)
Has Fulltext
- no (62) (remove)
Is part of the Bibliography
- yes (62)
Keywords
- Dünnschichtchromatographie (2)
- 2D-Ortung (1)
- 3D User Interface (1)
- 3D-Ortung (1)
- Absorption (1)
- Abwärmenutzung (1)
- Akustik (1)
- Alexander von Humboldt (1)
- Android (1)
- Belastung (1)
Institute
Open Access
- Closed Access (20)
- Open Access (16)
- Bronze (6)
- Closed (3)
'Natural Sound'
(2009)
The idea of this game is to use a flashcard system to create a short story in a foreign language. The story is developed by a group of people by exchanging sentences via a flashcard system. This way, people can learn from each other without fear of making mistakes because the group members are anonymous.
We report improved separation of the highly toxic contact herbicides paraquat, diquat, difenzoquat, mepiquat, and chloromequat by HPTLC. Quantification was based on a new derivatization reaction using sodium tetraphenylborate. Measurements were in the wavelength range from 440 to 480 nm or from 440 to 590 nm. An LED emitting very intense light at 365 nm was used for excitation. The quantification limits of paraquat and diquat in water, using improved solid-phase extraction, was in the low ng L −1 range. The linear range covered more than two orders of magnitude. Recovery was investigated for all the compounds, and was insufficient, ranging from 11 to 92%, but the method is inexpensive, rapid, and works reliably.
There are additional long-term effects which also change the micro-structure of the polymer network and consequently the effective number of polymer chains in the material. These effects are summarized by ageing processes and will be used in the following to explain the basic assumptions of the model which can be generalized to simulate the viscous behaviour of the material. An implementation of these concepts into FEM codes is straightforward and has been carried out to the solver ABAQUS, Baaser & Ziegler (2006), Baaser et al. (2009).
Aktives Wertemanagement
(2009)
This paper presents an enhancement on QPSK modulation technique for near field communication (NFC). The enhanced modulation is based on continuous-phase QPSK with Gaussian filtering during switch from one phase to the other. Signal processing is done digitally with minimum external discrete components for air interface. The telemetry system can be used to assist a smart capsule (slave) that can be swallowed to establish data communication with external device (master). The system is designed, simulated, and emulated on FPGA showing 20 dB attenuation on side-lobes of the spectrum.
Es ist stark davon auszugehen, dass sich sowohl die regenerative Wärme- und Kälteerzeugung als auch die Automation zukünftig zu zentralen Themen der nachhaltigen Energienutzung entwickeln werden.
Dieses Lehr- und Fachbuch gibt eine kompakte Übersicht über regenerative Systeme zur Wärme- und Kälteerzeugung. Einbindungs- und Automatisierungsschemata ermöglichen einen schnellen Überblick. Ebenso werden die Grundlagen zum Regelverhalten von Systemen zur regenerativen Energienutzung dargestellt. Praxisbeispiele zeigen anschaulich Standardlösungen zur Einbindung von regenerativen Energiequellen.