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Semesta Teknika
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 1411061X     EISSN : 25025481     DOI : https://doi.org/10.18196/st
Core Subject : Engineering,
Engineering
SEMESTA TEKNIKA is a reputable refereed journal devoted to the publication and dissemination of basic and applied research in engineering. SEMESTA TEKNIKA is a forum for publishing high quality papers and references in engineering science and technology. The Journal is published by the Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, INDONESIA. Copyright is by the publisher and the authors. The Journal is issued in electronic form and also issued in printed form as annual volume for the contributors only. The journal contains original research papers, review articles, short notes and letters to the editors. The topics of interest include modeling, experimental, analytical and numerical investigations on the mechanical, physical, chemical and mineralogical properties of material, developing the prototype/instrument, technology and construction process. Topic of management in industry and civil construction is also considered. SEMESTA TEKNIKA receives manuscripts from the contributor written in the Indonesian and English. Manuscripts submitted to the journal for publication must not have been previously published or is under consideration simultaneously by any other publication. Manuscripts submitted to SEMESTA TEKNIKA will be reviewed Peer Reviewers local and foreign.
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Articles 22 Documents
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Search results for , issue "Vol 12, No 1 (2009): MEI 2009" : 22 Documents clear
Experimental Investigation of Seismic Parameters and Bearing Capacity of Pavement Subgrade Using Surface Wave Method Wahyu Widodo; Sri Atmaja P Rosyidi
Semesta Teknika Vol 12, No 1 (2009): MEI 2009
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v12i1.748

Abstract

The spectral analysis of surface waves (SASW) method is introduced as an in-situ non-destructive seismic technique where the method consists of the generation, measurement and processing the dispersive Rayleigh waves from two vertical transducers. Subsequently, the dispersive data of Rayleigh phase velocity are inverted and the shear wave velocity versus depth of the site is obtained. The dynamic stiffness parameters, i.e. elastic modulus generated from the SASW measurements are at a very small strain levels of 0.001%. At this strain level the soil is linearly elastic and the use of elastic theories is thus justified. The aim of this paper is to investigate the seismic parameters of the pavement subgrade stiffness using the SASW method and to predict its bearing capacity based on the seismic parameters. In order to determine the bearing capacity, in situ dynamic cone penetrometer (DCP) was also carried out in the same location of SASW test.  The relationship of the shear wave velocity and dynamic elastic modulus (Edynamic) of the SASW were found to be in good correlation with bearing capacity obtained by the DCP. 
Pengaruh Faktor Lingkungan terhadap Strategi dan Kinerja Industri Manufaktur di Jawa Timur Rachmad Hidayat; Hairil Budiarto
Semesta Teknika Vol 12, No 1 (2009): MEI 2009
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v12i1.744

Abstract

This research examined the influence of environment factors (industrial, operational and remote) on the strategy and performance of manufacturing industries in East Java. The Structural Equation Modeling (SEM) was employed to test the hypotheses which emerged from the observed conditions. Moreover, the AMOS 4.0 was also used to perform the SEM. The results showed that the environment factors, i.e. industrial and operational environments as well as remote environments jointly affect the understanding of the environment industry matching with industry and environmental operational environment to establish its strategic objectives as an effort to achieve optimum performance manufacturing industries in East Java. Industrial environment conditions cannot be isolated from the global crisis because most industries prefer to concentric diversification strategy where new product technologies have a relevance to existing products.

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