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Mood affects an individual's performance, whether relaxed/tense or alert/fatigued. This article was based on research to study a correlation between the lighting setting with relaxed-tense and alert/fatigued moods in the workplace by observing the illuminance level, the correlated color temperature (CCT), and the overhead/peripheral placement of lighting. The research was conducted with two online image-based questionnaire evaluations of 7 different lighting settings specifying their illuminance level, CCT, and placement as overhead or peripheral lighting depicted in images from the DIALux simulation. In the first questionnaire, subjects were asked to rate the difference between the two lighting displays being compared and the combination of the seven lighting settings. In the second questionnaire, subjects were also asked to rate their relaxed-tense and alert-fatigued perceptions of the lighting diplayed in the image. The results of these two questionnaires were analyzed by multidimensional scaling and correlation analysis. This image-based research concluded that a relaxed/tense perceived mood correlated negatively with the CCT, and an alert/fatigued perceived mood correlated negatively with the illuminance level and the CCT. [ABSTRACT FROM AUTHOR]

The Gajah Mungkur reservoir (GMR) area is located in Wonogiri district. The reservoir was built to prevent flooding issues. There are some parts of the reservoir that function for nature tourism. This function has supported the development of other infrastructures and facilities. In addition, the development of Wonogiri district has promoted a variety of new growth centres. Therefore, sustainable development is urgently needed to minimize negative impacts on the environment both now and in the future. This study aims to assess the level of sustainability of the GMR area through a simulation method on the floor area ratio, operational energy, lifecycle, and design accessibility. The findings show that the GMR area had a sufficient sustainability habitat system based on the parameter standards value with various buildings intended for residential, retail, office, and hotel. This study suggested that GMR area had high sustainability habitat based on the standard of Operational Energy (OE), lifecycle of building, lifecycle of facade and glazing, and design accessibility. Meanwhile, based on the simulation, Floor Area Ratio (FAR) in the GMR area had a low value since the study area was dominated by green area. The low FAR value indicated a low building density in the GMR area, and it may be considered that there is a high possibility of improving the rural development of the area. The research results are expected to contribute to the sustainable development of the GMR area. [ABSTRACT FROM AUTHOR]

Weight plays a significant role in the automotive and aerospace fields due to the demand of lightweight material structures. A lighter body in weight (BIW) and in structure can reduce fuel consumption, lessen emissions, and support the SDGs 9, 11, 12, and 13. Therefore, polyurethane (PU) foam is suitable for applications that require low weight. The characteristics of hybrid polyurethane-graphite micro were successfully evaluated in this study. Several tests have been used to characterize these structures, such as, compression, hardness, density, surface evaluation, and FTIR analysis. The results showed that the expansion and shrinkage variations lead to different shapes at specific ratios. Compression tests show that the highest value occurred at 0.84 kN, with a 4:1 ratio found in pure PU foam without any reinforcement. PU foam with 2% graphite filler showed the highest results at the 4:1 ratio with a value of 0.45 kN. Furthermore, the highest hardness test result was 37.7 SHD. Density testing indicates that the highest value is obtained from specimens with a 4:1 ratio of 0.077 g/cm3. FTIR testing reveals that adding graphite as a filler alters the chemical bonds during the formation of solid PU foam. Surface observations show that adding graphite as a filler influences the variation in material structure formation. All the evaluation has tended to conclude the present combination as suitable for lightweight structures applications. [ABSTRACT FROM AUTHOR]