Drivers of nitrogen and phosphorus dynamics in a groundwater-fed urban catchment revealed by high-frequency monitoring

Groundwater-surface water interaction in urban lowland catchments. Water quality dynamics in the city of Amsterdam

Stedelijke watereutrofiëring is een wereldwijd probleem dat aanzienlijke maatschappelijke, economische en ecologische schade veroorzaakt. Vermindering van de nutriëntenbelasting is vastgesteld als een doelstelling voor het verminderen van eutrofiëring in natuurlijke en kunstmatige waterlichamen. Effectief waterkwaliteitsbeheer in de stedelijke...

Urban hydrogeology: Transport routes and mixing of water and solutes in a groundwater influenced urban lowland catchment

Urban areas in coastal lowlands host a significant part of the world's population. In these areas, cities have often expanded to unfavorable locations that have to be drained or where excess rain water and groundwater need to be pumped away in order to maintain dry feet for its citizens. As a result, groundwater seepage influences surface water...

Groundwater impact on surface water quality and nutrient loads in lowland polder catchments: monitoring the greater Amsterdam area

The Amsterdam area, a highly manipulated delta area formed by polders and reclaimed lakes, struggles with high nutrient levels in its surface water system. The polders receive spatially and temporally variable amounts of water and nutrients via surface runoff, groundwater seepage, sewer leakage, and via water inlets from upstream polders....

Influence of solid-state microstructure on the electronic performance of 5,11-Bis(triethylsilylethynyl) anthradithiophene

The rich phase behavior of 5,11-bis(triethylsilylethynyl) anthradithiophene (TES ADT) - one of the most promising, solution-processable small-molecular organic semiconductors - is analyzed, revealing the highest performing polymorph among four solid-state phases, opening pathways toward the reliable fabrication of high-performance bottom-gate...

System-level assessment of non-orthogonal spectrum sharing via transmit beamforming

We assess the system-level performance of nonorthogonal spectrum sharing achieved via maximum sum-rate (SR), Nash bargaining (NB), and zero-forcing (ZF) transmit beamforming techniques. A look-up table based physical layer abstraction and radio resource management mechanisms (including packet scheduling) are proposed and incorporated in system...

Solution-processed small molecule transistors with low operating voltages and high grain-boundary anisotropy

We present a new soluble pentacene derivative with ethyl substitutions in the 1,13,14,22 backbone positions to modulate the solubility and film forming properties of this material compared to triisopropylsilylethynyl (TIPS) pentacene. This permits reproducible production of molecularly highly ordered structures that feature average transistor...

Single-step solution processing of small-molecule organic semiconductor field-effect transistors at high yield

Here, we report a simple, alternative route towards high-mobility structures of the small-molecular semiconductor 5,11-bis(triethyl silylethynyl) anthradithiophene that requires one single processing step without the need for any post-deposition processing. The method relies on careful control of the casting temperature of the semiconductor and...

Fiber Bragg Grating sensors for structural health monitoring of Tsing Ma bridge: Background and experimental observation

The rapid expansion of the optical fiber telecommunication industry due to the explosion of the Internet has substantially driven down the cost of optical components, making fiber optic sensors more economically viable. In addition, the rapid development of fiber-optic sensors, particularly the fiber Bragg grating (FBG) sensors offers many...