According to Organic Green Roots: ‘photoluminescent Core Glow pebbles provide an interesting, almost ethereal feature to outdoor design. When the eco-friendly pebbles are exposed to light sources, (solar or otherwise) the special light capturing pigment within them becomes chemically excited and will ‘glow’ once that light source is removed. The luminescent material is a multi-activated, highly efficient powder cultivated from the earth, that enables light-storing with a long afterglow.
When added to a concrete driveway and exposed to the sun, the pebbles will store enough energy to illuminate a dark pathway all night long, initially very radiant, then slowly dissipating as dawn arrives. With only 10-20 minutes of exposure to daylight or lamplight, the pebbles can maintain their afterglow for about 10-12 hours.
The CORE Glow pebbles are non-radioactive, non-toxic and environmentally friendly. They can be implemented in a variety of landscaping, custom concrete or masonry needs. The material is a inert long lasting recyclable plastic but are also available in a recycled glass. Both last an average of 20 years.
So what makes them glow? A chemical element called Strontium aluminate; and an activator, Europium is added – this causes a chemical reaction, creating the glow. The material is biologically and chemically inert, so completely safe for home use.
These pebbles are primarily an esthetic element that can add a new layer to hardscape designs but certain applications will help to greatly reduce pathway lighting costs. Since the CORE Glow products require no electricity, no power supply and no batteries they saves natural resources and offer an alternative to traditional pathway lighting.’
Hurricane Sandy has made it ever more clear: disaster control or emergency managment should be a priority in urban development and urban managment. People keep moving to urban areas, which become vulnerable when it comes down to natural disasters. Not in the least because they are often situated along coastlines and in delta’s. Here the impact of heavy weather and flooding this could cause is a primary concern. Disaster control or emergency managment requires some basic but elaborative concepts which are described by the ‘Division of Homeland Security and Emergency Services (DHS)‘ of the U.S.A. These include among others: Emergency Sheltering Provision, Dam Safety Preparedness and a Hazard Analysis Program. Emergency Sheltering requirements foresee in the provision of safe havens for large populations. These shelters require good accessibility and large scale sanitary infrastructure for example. Dam Safety Preparedness regulates the condition of the Dams in New York State. According to the DHS ‘There are approximately 400 high-hazard (Class C) and nearly 800 moderate-hazard (Class B) dams that pose a threat to jurisdictions in the event of a dam failure. Approximately 70 of the high-hazard dams produce hydroelectric power’..The Hazard Analysis Program ‘Hazny’, ‘is an automated hazard analysis program. HAZNY asks questions concerning hazards that you face and, based upon your responses, rates and ranks each hazard. It includes guidance on organizing a team approach in conducting the hazard analysis’. Planning and controlling cities in order to secure safety is a Smart approach but not new at all. The lay-out of many historic towns worldwide has been based on the concept of security, though disaster control in those days was primarely related to military defense. Safety and emergency managment has been on top of the urban agenda sinds 9/11, Hurricane Sandy is stressing again the necessity for a Smart infrastructure to cope with natural disasters. That might prevent New York against flooding and another blackout.
Picture above: ADA Security Checklist for emergency Shelters. On top: New York Magazine cover, photograph by Iwan Baan.
In the summer of 2007 the ‘Coalition Project 1012’ started. This collaborative project initiated by the municipality, intends to reduce crime and to contribute to the economic upgrading of the postcode area 1012, the Red Light District in Amsterdam. 1012 is located in the heart of historic Amsterdam and is a major attraction for visitors from home and abroad. In order to maintain and improve this condition the Red Light District should be diversified. One of the applied strategies is a street-oriented one. Quite some red light windows and coffeeshops will dissappear after negotiation with the owners. To upgrade the street, ‘streetteams’ will be established who together with the inhabitants and entrepreneurs will make a vision for the street or a cluster of streets. Together with parties who already have position in the area a strategy to buy property has been set up. This property gets another function. Successful is to attract the creative industry. This sector feels at home within urban and ‘rawer’ conditions and are not scared off by the dubious industry which is just around the corner. The 1012 project already added several interesting creative spaces to the Red Light District like Ultra de La Rue Creative Space on the picture below. In the Rua General Jardim in São Paulo a similar strategy upgraded a prostitution street with the addition of a school for architecture, the Escola de Cidade and the Instituto de Arquitetos do Brasil. This resulted in a weird mix of functions and people on the street, but above all it established a safer and more attractive street in downtown São Paulo.