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INDONESIA
Teknologi Indonesia
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 01261533     EISSN : 23031913     DOI : -
Core Subject : Science,
Computer Science & IT
JTI is a journal in the Departement of Engineering Sciences - Indonesian Institute of Sciences (LIPI). JTI has policy to publish a new and original research paper or a review paper in The scope of Technology. JTI publishes two issues per year. The journal has been registered with printed-ISSN number as 0126-1533 and electronic ISSN number as 2303-1913.
Arjuna Subject : -
Articles 16 Documents
 1   2 
Search results for , issue " Vol 34 (2011)" : 16 Documents clear
PENCARIAN POLA DATA SEKUENSIAL KLIMATOLOGI UNTUK PREDIKSI LUAS GENANGAN BANJIR Suwarningsih, Wiwin; Suryawati, Endang
Teknologi Indonesia Vol 34 (2011)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.048 KB) | DOI: 10.14203/jti.v34iKhusus.43

Abstract

This research will explain how to fi nd the pattern of climate data to help predict flood inundation areas caused by the rain. Methods to be used is the order of enumeration with Lattice theory approach to the enumeration sequence to perform the operation JOIN and MEET to produce a sequence that has undergone the process of intersection with the id-list containing an equivalent class, but this theory also do a search on the show DFS and BFS to produce a event frequent or not. The end result of this research is the sequence of flood events with a large puddle of water that often arise which can be used to simulate the broad prediction of inundation caused by flood.
TEKNIK PERBANYAKAN KIJIWO (EUCHRESTA HORSFIELDII (LESCH.) BENN.) MELALUI STEK PUCUK Ekasari, Indriani
Teknologi Indonesia Vol 34 (2011)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.048 KB) | DOI: 10.14203/jti.v34iKhusus.34

Abstract

Kijiwo (Euchresta horsfi eldii (Lesch.) Benn.) is one of the Indonesia native species that had a habitat in montane forest. Propagation of Kijiwo through generative is very diffi cult to fi nd. The alternative conservation effort for Kijiwo is a shoot propagation. The aims of this study were to estimate the growth percentage of shoot propagation and to determine the effectiveness of artifi cial hormone for rooting on shoot propagation. The artifi cial hormone that be used were IAA, IBA, NAA, and Rootone F. Control treatment was also conducted as non treatment indicator. This study was conducted in the nursery of Cibodas Botanic Garden for 5 months. Randomized Complete Block Design with 2 blocks (potrays). Each potray contains 45 polytube for 45 shoot that can consist 5 artifi cial hormone treatments and each treatment were replicated into 9 shoots. Watering was done every 3 days and checking the root was done every month. Parameters of this study were root number, root length, wet weight of root, and dry weight of root. Data analyzed on R.2.12.2 software with two-way ANOVA. The result showed that growth percentage was 98,89%. The application on artifi cial hormone showed not signifi cant difference on parameters (P>0,05). Only block treatment on wet weight of root showed signifi cant different (P<0,05).
PENGOLAHAN BAN BEKAS BERWAWASAN LINGKUNGAN MENJADI BAHAN BAMPER PADA OUTOMOTIF Bukit, Nurdin; Frida, Erna
Teknologi Indonesia Vol 34 (2011)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.048 KB) | DOI: 10.14203/jti.v34iKhusus.48

Abstract

On the minimizing of waste tires which can damage the environment can be done by processing waste tires into powder waste tires and used as a fi ller in the manufacture of thermoplastic elastomer composite which can be used as bumpers on automotive. The Research has been done by mixing the powder waste tires, SIR-20 compound and polypropylene,with Polipropilena Maleic anhydride compatibilizer. Preparation of raw materials is done by making rubber compound with two roll mill mixing equipment. Composite made by blending process at temperature of 180C with a speed of 60 rpm in an internal mixer, with composition (30, 40, 50)% weight and size of 1mm and 60 mesh, composite results in a granular form in the molding hot press, cold, then made in to specimens for each test sample in accordance with JIS K 6781 standard size for tensile test. The Results obtained from mechanical test properties waste tires size 60 mesh powder better than the size of 1mm. The best mechanical properties obtained on the composition of 50% with a maximum of 13 MPa tensile strength and elongation at break 148%. The result of SEM analysis of morphology 60 mesh size is more than homogeneous than 1mm.
PROSES AGLOMERASI DAN DAMPAK OPERASIONAL PADA PEMBAKARAN CANGKANG SAWIT DALAM UNGGUN TERFLUIDISASI Wahyu, Haifa; Affendi, M.
Teknologi Indonesia Vol 34 (2011)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v34iKhusus.39

Abstract

The use of palm shell as fuel in fl uidized bed may be a better choice than that of coal in terms of carbon emission elimination due to its more environmentally friendly properties. But in reality it will cause operational problems. Continuous combustion results in agglomeration of the sand bed, which triggers defl uidization and hence operational shut down. This paper presents a combustion test of palm shell in a laboratory scale fluidized bed furnace with the capacity of 15 kg/hr located at the Research Centre of Physics, Indonesian Institute of Sciences. The results show that continuous burning of palm shell will lead to agglomeration in the furnace, especially when the temperature was above 800oC. The alkali and chlorine material contained in the biomass ash will interact with calcium silicate contained in the sand bed of FBC during combustion. Therefore the mixture of ash and silicate produces clinker that lowers its melting temperature down to about 800C.
PENGARUH OSILASI TAHUNAN DAN ENSO TERHADAP VARIABILITAS OZON TOTAL INDONESIA Ambarsari, Novita; Yulihastin, Erma
Teknologi Indonesia Vol 34 (2011)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v34iKhusus.44

Abstract

The global ozone data of TOMS (Total Ozone Mapping Spectrometer) from NASA (National Aeronautics and Space Administration) Satellite was used from 1997 to 2005 in Indonesia (90E-151.2E, 12.5S-12.5N). The results of time series total ozone concentration data showed that the concentration varied from 242 to 275.38 Dobson Units. The highest concentration occurred from September to October, which was period of transition season from dry to rainfall season in Indonesia. In that times occurred autumn in northern hemisphere. The lowest concentration occurred from December to February, which was period of peak rainfall season in Indonesia, besides winter in northen hemisphere. The spectral analysis used FFT (Fast Fourier Transform) method founded total ozone variability in Indonesia from 1997 to 2005 was dominant infl uenced by annual oscillation (period of 11.33 months), ENSO (25.5 months), and semiannual oscillation (5.67 months).
PERTUMBUHAN IN VIVO BULUH SERBUK SARI DALAM STIGMA GINSENG JAWA (TALINUM TRIANGULARE) PASCA PENYERBUKAN BUATAN: EFEK DONOR SERBUK SARI Rachman, Erlin; Tihurua, Eka Fatmawati
Teknologi Indonesia Vol 34 (2011)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v34iKhusus.35

Abstract

Talinum triangulare Wild. pollen were germinated in vivo in the stigma with three hand pollination treatments based on pollen donor in order to know its germination rate and if the pollen tube growth rate affected by pollen origin. Flower buds were picked at prior to anthesis time and let them to anthesize in laboratory condition. The three pollination treatments were directly excecuted at full anthesis stage and four different incubation times: 5, 10, 15 and 20 minutes. The experiment was conducted twice with about one month interval between November and December 2008. Signifi cantly different pollen tube growth rate was only showed between stigma pollinated by pollen from neighbor fl owers of same individual and stigma pollinated by pollen from next indidual plant. Highest final pollen germination level and tube growth rate was resulted by hand pollination with pollen from neighbour flowers of the same individual called geitonogamy (54.84% and 9.081 ?m per minute). Second highest was pollination with pollen from the flower itself called autogamy (45.92% and 6.806 ?m per minute). The lowest was hand pollination with pollen from flowers of outside individual called exogamy (39.61% and 3.525 ?m per minute). Stagnated growth of pollen tubes after pollination with outside pollen in exogamy at fi rst minutes of incubation may be related to individual adaptation.

Page 2 of 2 | Total Record : 16

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