Mandating indoor air quality for public buildings: If some countries lead by example, standards may increasingly become normalized

People living in urban and industrialized societies, which are expanding globally, spend more than 90% of their time in the indoor environment, breathing indoor air (IA). Despite decades of research and advocacy, most countries do not have legislated indoor air quality (IAQ) performance standards for public spaces that address concentration...

Flow Control and Passive Low Noise Technologies for Landing Gear Noise Reduction

This paper examines the use of both flow control and passive low noise technologies to reduce the aerodynamic noise radiated from a modified LAGOON landing gear, as tested in the EU funded H2020 collaborative research project: INVENTOR, InnoVative dEsign of iNstalled airframe componenTs for aircraft nOise Reduction. At approach to landing,...

Experimental study of realistic low–noise technologies applied to a full–scale nose landing gear

The landing gear system is the dominant airframe noise source for most modern commercial aircraft during approach. This manuscript reports the results from the ALLEGRA (Advanced Low Noise Landing (Main and Nose) Gear for Regional Aircraft) project. This project assessed the performance of several highly realistic low–noise technologies (LNTs)...

Remote Sensing for Land Administration

Land administration constitutes the socio-technical systems that govern land tenure, use, value and development within a jurisdiction. The land parcel is the fundamental unit of analysis. Each parcel has identifiable boundaries, associated rights, and linked parties. Spatial information is fundamental. It represents the boundaries between land...

3D Land Administration for 3D Land Uses

Multi-approach study of nose landing gear noise

The noise emissions of a full-scale nose landing gear (NLG), measured in a wind tunnel and obtained from computational simulations, are compared with those of three regional aircraft types recorded in flyover measurements. A comparison is made with the noise prediction models of Fink, Guo, and German Aerospace Center (DLR). A good agreement...

Exploring and Assessing STDM and LADM for gender equitable land administration

International laws and frameworks such as the 2030 Agenda for Sustainable Development with its defined Sustainable Development Goals (SDGs), together with the Voluntary guidelines on the responsible governance of tenure of land, fisheries and forests in the context of national food security (VGGTs) are key global cornerstones in the protection...

LIVVkit 2.1: Automated and extensible ice sheet model validation

A collection of scientific analyses, metrics, and visualizations for robust validation of ice sheet models is presented using the Land Ice Verification and Validation toolkit (LIVVkit), version 2.1, and the LIVVkit Extensions repository (LEX), version 0.1. This software collection targets stand-alone ice sheet or coupled Earth system models,...

Flexible Lead-Free Piezoelectric Composite Materials for Energy Harvesting Applications

Vibrational piezoelectric energy harvesters are being investigated to replace batteries in embedded sensor systems. The energy density that can be harvested depends on the figure of merit, d₃₃g₃₃, where d₃₃ and g₃₃ are the piezoelectric charge and voltage coefficient. Commonly used piezoelectric...

Description and evaluation of the Community Ice Sheet Model (CISM) v2.1

We describe and evaluate version 2.1 of the Community Ice Sheet Model (CISM). CISM is a parallel, 3-D thermomechanical model, written mainly in Fortran, that solves equations for the momentum balance and the thickness and temperature evolution of ice sheets. CISM's velocity solver incorporates a hierarchy of Stokes flow approximations, including...

Analysis of nose landing gear noise comparing numerical computations, prediction models and flyover and wind-tunnel measurements

The noise emissions of a full-scale nose landing gear, measured in a wind tunnel and obtained from computational simulations, are compared with those of three regional aircraft types recorded in flyover measurements. The results from these three approaches are also compared with the predictions of two airframe noise models (Fink and Guo). The...

Hydroclimatic variability and predictability: A survey of recent research

Recent research in large-scale hydroclimatic variability is surveyed, focusing on five topics: (i) variability in general, (ii) droughts, (iii) floods, (iv) land-atmosphere coupling, and (v) hydroclimatic prediction. Each surveyed topic is supplemented by illustrative examples of recent research, as presented at a 2016 symposium honoring the...

Comparing flyover noise measurements to full-scale nose landing gear wind tunnel experiments for regional aircraft

The Land Administration Domain Model

Societal drivers including poverty eradication, gender equality, indigenous recognition, adequate housing, sustainable agriculture, food security, climate change response, and good governance, influence contemporary land administration design. Equally, the opportunities provided by technological development also influence design approaches. The...

"Second order" exploratory data analysis of the large scale gas injection test (lasgit) dataset, focused around known gas migration events

Within large-scale experimental datasets a wealth of small scale information can typically be found. An example of such an experiment is the Large Scale Gas Injection Test (Lasgit). A toolkit has been developed to facilitate the investigation of the small scale or ‘second order’ detail contained within Lasgit’s dataset. Results obtained through...

Information contained within the large scale gas injection test (Lasgit) dataset exposed using a bespoke data analysis toolkit

The Role of the Efb Working Party on Education in the European Network

Early Biotechnology: The Delft Connection. Early Dutch microbiologists fostered their own golden age of microbiology