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Category: 2010


Keywords: sugar palm fiber, albizzia sawdust, sandwich composite, mechanical properties

By: Budi Legowo, Kuncoro Diharjo, Jamasri

This study aims to investigate the optimum design of sandwich composite reinforced sugar palm fiber (SPF) with albizzia sawdust (AS) core and investigate effect of thermal cyclic and dynamic flexural loading on mechanical properties. The SPF was alkali treated (5% NaOH) to remove lignin. The matrix used for skin composite reinforced SPF was unsaturated polyester resin (UPRs), whereas urea formaldehyde (UF) resin was used as binder of the core. The result shows that the skin composite reinforced by 4 hour of alkali treated fiber has the highest strength. By using press mold method, the optimum fiber content of the skin composite is about 30-35% (v/v). The 60% of sawdust content (w/w) results the highest mechanical properties of core. By using the optimum properties of skin and core, the sandwich composite, whose 2 mm of skin and 10 mm of core thickness, has better mechanical performance compared to that with other dimension. The sandwich composite, treated by using thermal cyclic, has lower mechanical properties compared to untreated composite. The increasing of temperature and cyclic number decreases the bending strength and impact toughness of the sandwich composite. For dynamic flexural loading test, the increasing of load cyclic number increases deflection and decreases stiffness of the sandwich composite. This composite has a good opportunity to be applied for housing and furniture panels.

Model for Poor Women Empowerment through Family-Based Entrepreneurship towards Creative Economy in Karanganyar Regency

Keywords: creative economy, family-based entrepreneurship, poor women

Ismi Dwi Astuti & Sri Marwanti

This research underlines several issues concerning the empowerment of poor women through family-based entrepreneurship towards creative economy. The research was intended to explore the potentials, constraints, opportunities and policies dealing with the empowerment of poor women, and to formulize a model for the empowerment.

Data collection consisted of site observation, Novomatic bietet exklusive, bestbewertete kostenlose spielautomaten spiele ohne Anmeldung und ohne Einzahlung mit klassischem 5-Walzen swoie 9-Gewinnlinien-Design, Scatter und Freispielen mit Wild-Symbolen. interview, focus group discussion, and document study. The techniques of analysis employed in this research included interactive analysis and gender analysis by Sara Longwee.

The results of this research was a model named “Pro-poor Capacity Improvement” which highlights several components including poor women’s potentials, constraint, opportunities, interventions in the form of family-based entrepreneurship, and welfare.

Utilization of Desalination Waste for Synthesis of Mg/Al Hydrotalcite-Like as raw Material Pharmacy Industries

Keyword : preparation, characterization, Mg/Al HTlc, brine water, raw material, pharmacy

By: Eddy Heraldy and Yuli Puspito Rini

The synthesis of Mg/Al hydrotalcite-like (HTlc) using brine water from desalination waste for raw material pharmacy industries has been performed. Sample preparation of Mg/Al HTlc are using artificial brine water and brine water from desalination waste of PLTU Tanjung Jati B, Jepara, Central Jawa, respectively. Firstly, calsium content in brine water was removed by adding mixed solution Na2CO3-NaHCO3 with agitation for 1 h at 95±2⁰C. Then, into calcium free brine water was added AlCl3 with Mg/Al molar ratio of 2.0. With constant pH at pH 10.5±2, the solution was then continuously stirred for 1 hour at 70⁰C. The suspension product was filtered off, washed with distilled water until free of chloride ion. After that, all samples were dried overnight.

The obtained samples were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and surface area measurements. According to XRD results, the present study was able to show that the sample exhibit the (003) reflection around 7.6Ǻ, typical for Mg/Al HTlc with carbonate interlayer. This condition were supported by FT-IR results that characteristic of hydrotalcite peak appears around 3500 cm-1 are attribute to the stretching mode of OH groups, the wavenumber between 3000-3100 cm-1 due to hydrogen bonding of interlayer water with interlayer carbonate anion and the bending vibration of interlayer water is found around 1630 cm-1. Antisymmetric vibration of carbonate anion were shown around 1350-1400 cm-1, while corresponds to lattice vibrations of Mg-O, Al-O and /or Mg-O-Al are found below 1000 cm-1. From XRD and FT-IR characterization were proven that synthesis result is Mg/Al HTlc. In addition, the spesific surface area result was 30.82 m2.g-1 and be classified as microporous. Because Mg/Al HTlc synthesized has a relatively big spesific surface area, the sorption capacity of Mg/Al HTlc would be big too. From this preliminary studies, therefore, Mg/Al HTlc from brine water as possible as a raw material pharmacy industries.

Management Model Spatial Environment Friendly Village in Rural Areas Slopes of Mount Lawu

Key words : Rural environment lay-out, environmentally friendly, Mount Lawu.

By: Galing Yudana, Bambang Pujiasmanto, Widharyatmo

The objectives of this multi-year research were: 1) to identify land use in Ngargoyoso Karanganyar; 2) to explore the behavior pattern of the society in managing the environment; 3) to identify the society’s perceptions of environmental management; 4) to identify the local government’s programs dealing with environmental management; 5) to identify the internal and external factors related to environmental management; and 6) to formulate a model for sustainable rural environmental management in Ngargoyoso Karanganyar Central Java. Data were analyzed using several techniques including 1) Interactive analysis; 2) Internal-External model of analysis; Participatory approach; and 4) Collaborative approaches.

Results indicate that in performing community-based sustainable rural environmental management there were several factors related to the behavior of the local society and their perceptions of environmental management, government programs and internal and external factors. These factors need to be addressed when discussing environmental management.

Therefore, a model was formulized to perform appropriate environmental management. The model is called CBREM (Community-Based Rural Environmental Management).

Draft Model Flat Roof and Aperture With the Concept of Ecology to Achieve Comfort, Health and Productivity of Low-Income Community Shelter

Key words: model roof and openings, flats, comfort, health, productivity, the concept of Ecological architecture

By: Sri Yuliani, ST., M.App.Sc., Kahar Sunoko, ST., MT., and Ir. Soedwiwahjono, MT

The development of residential demand is increasing with the rapid rate of population growth. Flat built vertically from various considerations felt quite ideal, but to motivate productivity of occupancy must consider aspects of health and comfort. Design model of the roof to be so considered because this part is most of the building envelope that contribute to 60% factor of safety, comfort and health of occupancy. Position the top of this building is topped protect the building, on the other hand, especially in tropical regions, this part is quite strategic if used for activities that relate directly to the sun as an example of gardening, sunbathing or other productive activities. Likewise, the opening function that can provide freshness and smooth circulation of air in the room, thus making the air fresh and healthy in space that will ultimately achieved occupancy comfort. The purpose of this research is to obtain the right solution at the model apartment roof and openings so that the problem of settlements for low-income communities could be solved through the concept of Ecological Architecture. This concept was put forward a balance between natural and artificial environments. Through this concept of comfort, health and productivity of building occupants become the main destination.
Research methods in three stages, the first to identify the potential and constraints flats in urban environments; next stage performing searches and comparative literature studies and model of the roof opening flats in tropical climates to get the design concept of the ecological model of the roof and openings in urban towers with a case study Surakarta city, the last stage to test the model roofs and openings are comfortable, healthy and productive.
The expected result is a design model of a roof and openings for apartments that fit with the character of the climate, environment and residents of low-income communities. Research in Indonesia on the case is certainly very useful, especially in dense urban environments with low-income residents who need shelter board. The study was conducted in Surakarta that optimize the role of the openings in the building roof and towers that have a productive value and potential to improve quality of life of residents, especially low-income communities. Solutions that become the main alternative is a green roof and provision of roof openings to provide fresh air supply and smoothly vertically and make a hole in the wall of the room air that penetrates from front to rear to facilitate movement of air in the room.