The occurrence of spatial and road network changes, increased traffic volume approaching road capacity, causing congestion due to urban sprawl phenomena as well as lack of public facilities and social facilities. From...
The occurrence of spatial and road network changes, increased traffic volume approaching road capacity, causing congestion due to urban sprawl phenomena as well as lack of public facilities and social facilities. From this background problem considered to be solved by a concept that is Transit Oriented Development (TOD), concept of transportation development in co-operation with spatial. The TOD concept can eliminate urban sprawl, which transforms urban sprawl into a compact city area. Pull model are obtained from the results of the analysis is, Oi = -37,126 + 58,723 X9 + 17,968X2, where road performance, land use, the coefficient indicates the number of additional trip generation. Trips pull obtained by model Dd = -20,351 + 30,903X2 where only one significant variable causing attraction of land use that is dominant. With concept of TOD, the model obtained is Oi = 32.180 + 0.002X7-7.017X3 where travel and distance travel costs indicate the number of additional trips generation, the generation will decrease over the base year. Objects obtained with the model Dd = 48.474-0.671X11 + 0, 003X7-9,299X3, meaning travel attraction in the absence of population density, travel expenses, and travel distance, then travel appeal that occurs on 48 journeys influenced by variable population density and distance travel will decrease, it can be interpreted this independent variables can influence the drag on the concept of Banda Aceh City and TOD can be applied in the city of Banda Aceh.
Street vendors are usually centered around particular areas where they have made adaptations based on their activities, instead of scattered all over the city. These locations tend to be close to street vendors' p...
Street vendors are usually centered around particular areas where they have made adaptations based on their activities, instead of scattered all over the city. These locations tend to be close to street vendors' primary activities and consumers, occupy the public lands, and are productive and accessible. The Municipality of Surakarta has managed the street vendors in the form of stabilization and relocation. In Surakarta, there are 24 areas used for stabilization of street vendors varying in characteristics and quantities. This study uses a spatial analysis aiming to explain the characteristics of locations used for stabilization of street vendors and to identify their physical condition and arrangement. Furthermore, all of the research results will be used as the criteria in choosing the new locations that are suitable for the street vendors' characteristics and consumers' preference. The results show that the locations are on the roadsides of the neighborhood, local, and secondary collector roads. The traffic conditions in the stabilization areas are ranging from the very busy until relatively busy level since they are close to activities for trade, education, recreation, offices, and settlements.
Technical Kaolin is a commercially sold kaolin with a relatively low level of purity and is often used as a filler of paints, paper, and ceramics. In this study, we tested the technical properties of kaolin physically...
Technical Kaolin is a commercially sold kaolin with a relatively low level of purity and is often used as a filler of paints, paper, and ceramics. In this study, we tested the technical properties of kaolin physically and chemically, which include XRF, SEM, XRD, and FTIR. Based on the XRF test, the main composition of kaolin, SiO2, Al2O3, K2O, Fe2O3, and TiO2 were 46.66%, 39.63%, 0.84%, 0.55% and 0.274% respectively, while the rest were impurities. The FTIR spectra showed the functional groups of Al-OH, Al-O, and Si-O. While the XRD diffractogram identified kaolinite as the main mineral phase in the presence of quartz, chlorite, halloysite, and cristobalite tested in small quantities in the sample.
Visible light-induced two-step overall water-splitting was achieved by combining two types of photocatalysts, which were prepared by introducing foreign elements into rutile titanium dioxide (TiO2) and strontium titan...
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Visible light-induced two-step overall water-splitting was achieved by combining two types of photocatalysts, which were prepared by introducing foreign elements into rutile titanium dioxide (TiO2) and strontium titanate (SrTiO3) with a controlled electronic band structure. Rutile TiO2 and SrTiO3 were doped with chromium and tantalum (Cr,Ta-TiO2) and with rhodium (Rh-SrTiO3), respectively, to introduce visible-light sensitivity. Under irradiation with only visible light from a 420-nm LED lamp, the simultaneous liberation of hydrogen and oxygen with a molar ratio of ~2:1 was achieved with these two types of photocatalysts in the presence of iodate ion/iodide ion as a redox mediator.
Development of active iron based water oxidation for designing an ideal artificial photosynthesis devices operating under benign neutral pH is highly demanded. We investigated the electrocatalytic activity of Ruddlesd...
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Development of active iron based water oxidation for designing an ideal artificial photosynthesis devices operating under benign neutral pH is highly demanded. We investigated the electrocatalytic activity of Ruddlesden-Pop-per-type strontium ferrite (Sr3Fe2O7) toward the oxygen evolution reaction (OER). Owing to the temperature-dependent efficiency of the charge disproportionation of Fe4+, the OER activity of Sr3Fe2O7 varied with the temperature, and the onset potential for the OER at a neutral pH underwent a negative shift of approximately 200 mV by increasing the temperature for the stabilization of Fe4+. When metal substitution was made to Sr3Fe2O7 for stabilizing Fe4+ at room temperature, the temperature dependence of the OER activity disappeared and the OER was driven at a small overpotential without increasing the temperature, indicating that the stabilization of Fe4+ is substantially important for achieving high OER activity.
This paper discusses the development of urban forest areas in eastern Jakarta to encourage sustainable urban development and socio-economic environment balance. This research aims to calculate the urban forest area ne...
This paper discusses the development of urban forest areas in eastern Jakarta to encourage sustainable urban development and socio-economic environment balance. This research aims to calculate the urban forest area needs in sub-district of Makasar, Ciracas and Cakung sub-districts, East Jakarta. The method used is to calculate index of urban forest area requirement (Indeks Luas Hutan Kota / ILHK) with Marshal Edgewarth method approach. The potential land mapping using Landsat-TM satellite image data is further processed through spatial allasis using Geographic Information System (GIS). The results of this research indicate the existence of sufficient land potential and can function ecologically as urban forests, and able to be a driver for sustainable urban development.
Nowadays, passive cooling system is no longer the top priority among the design concept for public buildings in Indonesia. However, the passive cooling system once became an effective building technology to cope with ...
Nowadays, passive cooling system is no longer the top priority among the design concept for public buildings in Indonesia. However, the passive cooling system once became an effective building technology to cope with tropical climate in the Dutch colonial era. Semarang City, Central Java, has an outstanding heritage building equipped with passive cooling system, named Semarang Cathedral Church. This church was also built in the Dutch East Indies era and inaugurated in 1940. Research was held in 5 (five) times of church service and 9 (nine) measuring points where low ventilation was opened and closed during church service. Dry bulb temperature, effective temperature, relative humidity, and air velocity, were measured. The purpose of this study was to examine the thermal condition of the building with only passive cooling system. Thermal measurement and site observation were carried out. The results of this study show that there is a significant change on thermal condition inside building as the effect of low ventilations. The measuring points near the low ventilation (A, C, G, and I) have lower effective temperature and relative humidity in compared with other points, and also have higher air velocity. This study can provide the understanding of people about the importance of passive cooling system in public buildings.
Revitalization is a much-needed for a historic kampong as a settlement, place of business, and as tourist destinations. The research was conducted in Kauman as one of the cultural heritage kampong which was formerly a...
Revitalization is a much-needed for a historic kampong as a settlement, place of business, and as tourist destinations. The research was conducted in Kauman as one of the cultural heritage kampong which was formerly as a residence of abdidalemulamaKeraton who also work as batik entrepreneurs. This study aims to formulate a sustainable revitalization step based on the character of the area and the building. Aspects of sustainable revitalization that analyzed are the physical and non-physical condition of the environment. This research is an applied research with qualitative rationalistic approach supported with spatial distribution analysis through satellite imagery and Arch-GIS. The results revealed that sustainable revitalization for Kaumancan be done through: 1) Physical condition of the environment consists of land and building use, green open space, recreational park and sport activities, streets, drainage network, sewer network, the garbage disposal network; 2) Non-physical of the environment consists of economy, heritage socio-cultural, and the engagement of relevant stakeholders. The difference of this study with others is, this study is a continuation of the Kauman revitalization assistance program which involves community participation to produce a more appropriate solution for the problem of kampong.
Since plastic is considered as environmentally hazardous material, various programs aimed at educating the community on the impact of plastics pollution and consumption have been continuously conducted. Furthermore, t...
Since plastic is considered as environmentally hazardous material, various programs aimed at educating the community on the impact of plastics pollution and consumption have been continuously conducted. Furthermore, the relationship between culture and community behavior regarding single-use plastic bottle consumption is important to be investigated for mitigating plastics pollution. The purpose of the current research was to investigate the quantity of single-use polyethylene terephthalate (PET)-based plastic bottles are used daily and how communities are managing them in the waste stream. The data was collected from the family members of 100 households of various educational, social, economic, age, and lifestyle backgrounds. About seven local companies that work in plastic waste collection were also important participants in the data collection regarding plastics consumption. The study showed that almost 80 % of households reported one to four single-use plastic bottles consumed each day while the remaining 20 % used more than four single-use plastics bottles daily. From 88 respondents, only 10 % separated plastic bottles in their trash disposal. The result also showed that the increasing use of single-use plastic bottles are highly influenced by the behavior of the local community in plastics consumption and waste management.
Poly ε-caprolactone (PCL) gets a lot of attention, and shows great potential in some applications among synthetic polymers. This is because the thermoplastic polymer posses some desirable features, including good sta...
Poly ε-caprolactone (PCL) gets a lot of attention, and shows great potential in some applications among synthetic polymers. This is because the thermoplastic polymer posses some desirable features, including good stability, and easy of process. PCL also had some specific properties when it blended with organic or inorganic filler. Bentonite (montmorillonite/clay) has been studied as one of filler material used for improving the genuine properties of polymer. The modifying process of bentonite is an initial stage before mixing with PCL matrix to form a composite, it consist of purification and opening stage of d-spacing layer with surfactant for several size of bentonite (100,120, 150, 200 and 250 mesh). Some characterization have been done to measure how good the filler is. CEC value was obtained at size of 250 mesh of 79.00 meq/100 g. From the results of X-RD (X-Ray Diffraction) analysis shows the increasing bentonite d-pacing layer since before and after the modification process equal to 0,425 nm. FT-IR analysis identify the functional groups contained in bentonite, the Si-O and Al-O vibrations appear on wave numbers 420 cm-1-1200 cm-1. To identify the biomedical properties of PCL, chitosan nanoparticle has been added as filler with bentonite biomedical material applications such as for medical tools. The results of Tensile Test showed that the presence of modified chitosan-bentonite in PCL polymer improve the mechanical properties of the composite, the composition of filler Bentonit-Chitosan 7% is the maximum value of 290 Mpa.
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