Feeling Safe in the Dark : Examining the Effect of Entrapment, Lighting Levels, and Gender on Feelings of Safety and Lighting Policy Acceptability

This research examined to what extent physical factors, notably lighting and entrapment (blocked escape), and individual factors, notably gender, affect feelings of safety and the acceptability of reduced lighting levels. The authors reasoned that acceptability of reduced street lighting depends on perceived safety, which in turn depends on entrapment, lighting, and gender. Virtual representations of a residential street were used, systematically manipulating entrapment and lighting levels. As expected, people felt less safe in lower lighting and higher entrapment settings, and these settings were evaluated as less acceptable. Although women perceived a situation as less safe compared with men, the authors found no gender differences in acceptability, which extends previous research. Importantly, as hypothesized, perceived safety mediated the effect of lighting on acceptability levels, suggesting that people can accept lower lighting levels when social safety is not threatened

Lighting the Farmstead

PDF pages: 3

Pressurized lighting system

Safe lighting assembly has been constructed for hostile environments. Assembly is ventilated by inert gas to prolong life of lamps. Lighting assembly contains control box, number of lamps connected in parallel, several pilot lights, and ventilating circuit. Control box is provided with components for monitoring and controlling flow of ventilating gas through lamp assemblies

Beyond technology and finance: pay-as-you-go sustainable energy access and theories of social change

Two-thirds of people in sub-Saharan Africa lack access to electricity, a precursor of poverty reduction and development. The international community has ambitious commitments in this regard, e.g. the UN's Sustainable Energy for All by 2030. But scholarship has not kept up with policy ambitions. This paper operationalises a sociotechnical transitions perspective to analyse for the first time the potential of new, mobileenabled, pay-as-you-go approaches to financing sustainable energy access, focussing on a case study of pay-as-you-go approaches to financing solar home systems in Kenya. The analysis calls into question the adequacy of the dominant, two-dimensional treatment of sustainable energy access in the literature as a purely financial/technology, economics/ engineering problem (which ignores sociocultural and political considerations) and demonstrates the value of a new research agenda that explicitly attends to theories of social change – even when, as in this paper, the focus is purely on finance. The paper demonstrates that sociocultural considerations cut across the literature's traditional two-dimensional analytic categories (technology and finance) and are material to the likely success of any technological or financial intervention. It also demonstrates that the alignment of new payas- you-go finance approaches with existing sociocultural practices of paying for energy can explain their early success and likely longevity relative to traditional finance approaches

Lighting the Farm Home

PDF pages: 2

Application of Fuzzy Logic to Control Room Illumination Based Microcontroller

ABSTRACT An illumination room is needed by humans to recognize objects visually. Lighting has an influence on the function of a room. Therefore we need the lights as the main lighting source that can support the function room. Generally used for indoor lighting arrangements on-off principle. Lighting settings with on-off principle is based only on the condition of the light dark room, regardless of the contribution from the outside as the sun. This often resulted in inconvenience and inefficiency use of electrical energy. Therefore, adjustment is necessary lighting (illumination) generated light. Control principle used is fuzzy. Fuzzy inference system used in this room is the lighting controllers Sugeno method. The composition rules using the AND operator, while for the COG method is used defuzzyfication (Center of Gravity). As a main controller in the system using a microcontroller with input from the light sensor (LDR). The output of the controller then displayed on the LCD as a viewer and as an input the voltage regulator circuit. This system works in the room (in door) using the model of a house with three rooms as a model. From the simulation results with fuzzy control, if the setpoint of rooms 200 lux and state rooms are light at 80 lux, the light will produce light at 125 lux, if the setpoint 300 lux and 50 lux room condition, then lighting the lamp is 250 lux, and if the setpoint 150 lux and 30 lux room condition, then lighting the lamp is 125 lux. Keyword: Fuzzy controller, Illumination, Microcontrolle

A method for the visual detection of holes in thin polymeric films

Back-lighting polymeric film with polarized light from a polarizing plate and viewing it through a second plate cross-polarized to the back-lighting provides visual contrast between the flaw and the transparent film