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2013-05-08 08:51:40
Untag Telah Luluskan 35.000 Sarjana
2013-05-08 08:51:25
FKIP Untirta Gelar Gebyar Hardiknas 2013
2013-05-08 08:50:53
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Publikasi Penelitian Dosen

Material Development of Nanosilica Based on Indonesia Silica Sand for Concrete Mix

Global  development in concrete technology has entered a new era, better known as the era of smart concrete. In this era, nanotechnology triggers the development of the existing concrete technology. Indonesia can play an active role conisdering its vast natural resources such as petroleum, metals, minerals, coal and other natural materials. However, its role is still limited to providing raw materials. Thusresearch by national institutions must enable advanced development of processing technology for conceret based materials. One source of natural wealth which has the potential to be developed is silica sand. Based on data from Indonesian Directorat General of Mineral and Coal Technology (TEKMIRA), popular sources of silica sand in Indonesia are: Bangka Belitung, Pangkal Pinang,South Sumatra, Lampung, West Kalimantan, South Kalimantan, West Java, East Java. Unfortunately, the use of silica sand in concrete mix is still limited as filler material. The challenge is then to explore the use of such silica sand, for instance in the form of nanosilica. This research work explores silica sand from: Bangka Belitung, Pangkal Pinang, Lampung,West Java, east Java, West Kalimantan and South Kalimantan. Tests conducted are as follow: X-Ray Fluorescence (XRF), Scanning Electron Microscope-Energi Dispersive Spectrometer(SEM-EDS), X-Ray Diffraction(XRD), and Particle Size Analyzer(PSA. The selected silica sands are then processed by the novel mehod developed by Indonesian Ceramics Technology Institute (Balai Keramik) using Polishing Liquid Milling Technology. The result is expected to contribute in the development of increased added value of Indonesian silica sand and to adavancing application of nanosilica for concrete.  

Keywords: Nanotechnology, Nanosilica, characterization, Polishing Liquid Milling Technology, Visual.


Penulis : JONBI, DR.Ir. MT.,MM.,MSi [PDF File] didownload : 35 x

Intelligent E-Learning: The Next Generation of E-Learning System

Current e-learning system is still in the form collection of online uniform material for individual access without guidance on how to learn from it effectively.  Such condition will not challenge smart students to learn deeper that force them to abandon the system.  To increase the quality of the system, intelligent e-learning must be used.  In this kind of system, it can personalize its users that the learning materials recommended to a student will be different from the ones recommended to others students based on their profiles.  Such system also offers curriculum sequence technology which enables the students to plan their own learning sequence.  Technologies that can be used to develop such system include: web mining, adaptive information filtering, intelligent collaborative learning, and semantic web

Penulis : SRI REZEKI CANDRA NURSARI , M.Kom [PDF File] didownload : 40 x

Proposed Intelligent E-Learning System Using Semantic WEB

 E-learning is becoming an important tool in education.  Hence, more and more education institutions use it.  However, most of the e-learing systems used in most education institutions are the passive ones.  Passive here means that they cannot adapt to users’ need or in other words they cannot personalize its users and provide only what users need accordingly.  In order the system to be usefull to the users, it must be able to personalize them.  One form of personalization in intelligent e-learning is the ability to recommend learning materials that fit to their needs.  Such feature is called recommender.  This paper proposes an intelligent recommender system using Semantic Web which is able to recommend learning materials to users based on their interest. To guide the users in learning and understand fully on a specific topic, a subject network, which is a relationship among subject, is used.  The subject network will be presented in a list that suggests the order of learning


Penulis : SRI REZEKI CANDRA NURSARI , M.Kom [PDF File] didownload : 38 x

Pengaruh gas hydrogen terhadap efisiensi bahan bakar pada mesin motor 135 cc
Penulis : WINA LIBYAWATI, ST.MM.MT [PDF File] didownload : 58 x

Isolation and Identification of Chemical Compounds in n-butanol Extract from Keladi tikus Leaves (Typhonium flagelliforme (Lodd) Blume, Araceae

Typhonium flagelliforme (Lodd.) Blume), also known as Keladi tikus,  familia Araceae, is one of the restorative plant for anti cancer. This study was isolated and  identification of chemical compounds  from n-buthanol phase of the plant. This research is continued from previous research which is done by phytochemical screening, n-butanol phase was isolated using  column chromatography. The fractions were analyzed using TLC and the toxicity test using BSLT (Brine Shrimp Lethality Test). The fraction who have the smallest LC50 value was identified by UV-VIS Spectrophotometer, FTIR Spectrophotometer and Gas Liquid Chromatography-Mass Spectrometer. The results showed the B.4.3.1 fraction is the most active fraction with LC50 209.89 ppm.Based on the result of GCMS, in the n-butanol phase of Typhonium flagelliforme (Lodd.) Blume) is guess contains flavonoid compounds as dihidroflavonol groups, flavon, isoflavon and auron. 


Keywords : isolation,  Typhonium flagelliforme (Lodd). Blume, n-butanol phase, BSLT, 



Penulis : YUNAHARA FARIDA , Dr [PDF File] didownload : 65 x

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