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Articles 1 - 30 of 92
Full-Text Articles in Structural Engineering
Isolation Of Methyl Laurate From Coconut Oil As Raw Material For Fatty Alcohol Sulfate, Rita Arbianti, Tania Surya Utami, Astri Nugroho
Isolation Of Methyl Laurate From Coconut Oil As Raw Material For Fatty Alcohol Sulfate, Rita Arbianti, Tania Surya Utami, Astri Nugroho
Makara Journal of Technology
Isolation of Methyl Laurate from Coconut Oil as Raw Material for Fatty Alcohol Sulfate. Methyl laurate is a raw or base material for many industries, including surfactant industries. In this research, coconut oil (VCO) is transesterified with methanol to produce methyl ester, using NaOH as the catalyst. Methyl laurate is then separated by method based on the difference in melting point. This research focuses at determining the effects of some variables in transesterification on the concentration of produced methyl laurate. The variables are temperature (40 oC, 50 oC, 60 oC, 80 oC), time of transesterification reaction (0,5 hour, 1 hour, …
The Decompositioning Of Volatile-Matter Of Tanjung Enim Coal By Using Thermogravimetry Analyzer (Tga), Nukman Nukman
The Decompositioning Of Volatile-Matter Of Tanjung Enim Coal By Using Thermogravimetry Analyzer (Tga), Nukman Nukman
Makara Journal of Technology
The Decompositioning of Volatile-Matter of Tanjung Enim Coal by using Thermogravimetry Analyzer (TGA). Coal is a nature material which a kind of energy source. The decompotition of coal could analyze by heat treated using thermogravimetry analyzer. The decomposition of the volatile matter for three kinds of Tanjung Enim coal could be known. The value of activation energy that be found diference, then for Semi Anthracite, Bitumonius and Sub Bituminous Coal, the initial temperatures are 60.8 oC, 70.7 oC, 97.8oC, and the last temperatures are 893.8 oC, 832 oC, 584.6oC.
Phase Unwrapping Insar Image Using Local Energy Minimization Approach, Kusworo Adi, Tati L.R. Mengko, Andriyan B. Suksmono, Hendra Gunawan
Phase Unwrapping Insar Image Using Local Energy Minimization Approach, Kusworo Adi, Tati L.R. Mengko, Andriyan B. Suksmono, Hendra Gunawan
Makara Journal of Technology
Phase Unwrapping InSAR Image Using Local Energy Minimization Approach. Reconstruction process of phase data from its cover is called Phase Unwrapping (PU). Ideally, without any noise phrase, singularity, and aliasing problems, the phase information can be unwrapped easily. However, in fact, the phase data actually always get noise disturbance and discontinuity. The PU process becomes more complicated and needs a better PU algorithm to address the problems properly. In this research, the local PU algorithm is developed using minimization of close related firstorder pixels energy approach. In this method, the energy difference between four close related pixels is counted, followed …
Two Element Microstrip Antenna Array With Defected Ground Structure, Fitri Yuli Zulkifli, Eko Tjipto Rahardjo, Muhamad Asvial, Djoko Hartanto
Two Element Microstrip Antenna Array With Defected Ground Structure, Fitri Yuli Zulkifli, Eko Tjipto Rahardjo, Muhamad Asvial, Djoko Hartanto
Makara Journal of Technology
Two Element Microstrip Antenna Array with Defected Ground Structure. This paper presents a two element microstrip antenna array using trapezium shape defected ground structure (DGS). The DGS is inserted in the ground plane between two elements of antenna array. Insertion of the DGS is intended to suppress the mutual coupling effect produced by antenna array. Simulation and measurement results were taken and compared between antenna array with and without DGS. Measurement results show that the antenna with DGS compared to antenna without DGS can suppress mutual coupling effect to 7.9 dB, improve the return loss to 33.29% from -30.188 dB …
Hydrogen Absorption In Weldments Of Overlaid Claded Pressure Vessel, Ronnie Higuchi Rusli
Hydrogen Absorption In Weldments Of Overlaid Claded Pressure Vessel, Ronnie Higuchi Rusli
Makara Journal of Technology
Cracks was found in type 347 stainless steel internal attachment welds of a reactor for a high temperature, and high pressure hydrogen service. One of the possible causes of cracking is low cycle fatigue cracking induced by repetition of thermal stress to embrittled weld metal. Type 347 weld metal loses its ductility by presence of sigma phase and hydrogen.
Neutron Irradiation On Ss316 Material For Radioactive Endovascular Stent Production, Rohadi Awaludin, Abidin Abidin, Sriyono Sriyono
Neutron Irradiation On Ss316 Material For Radioactive Endovascular Stent Production, Rohadi Awaludin, Abidin Abidin, Sriyono Sriyono
Makara Journal of Technology
Neutron Irradiation on SS316 Material for Radioactive Endovascular Stent Production. It was reported that restenosis could be prevented by radioactive endovascular stent. SS316 material of endovascular stent has been irradiated at pneumatic rabbit system of G.A. Siwabessy reactor for 5 minutes for producing radioactive stent by neutron activation. After 10 days of decay, the irradiated SS316 was measured by gamma spectrometer. The radioisotopes of 51Cr, 59Fe and 60Co were detected in the irradiated SS316 with radioactivity of 5990, 107 and 109 Bq/mg respectively. The Calculation results showed that radioisotopes of 51Cr, 59Fe and 55Fe were produced by neutron activation. The …
Physical Characteristics And Utilization Oft The Karst Beaches In Kabupaten Gunungkidul, Astrid Damayanti, Ranum Ayuningtyas
Physical Characteristics And Utilization Oft The Karst Beaches In Kabupaten Gunungkidul, Astrid Damayanti, Ranum Ayuningtyas
Makara Journal of Technology
Physical Characteristics and Utilization oft the Karst Beaches in Kabupaten Gunungkidul. Karsts beaches at Gunungkidul Regency (Baron, Kukup, Sepanjang, Drini, Krakal, Ngandong, and Sundak), located in south of Daerah Istimewa Yogyakarta Province, have economic potential. Even they have similarity in geological condition (genesis and morphological processes), but they have different physical characteristics. Based on result of observation environment on morphological conditions and spatial analysis method, we found the proper utilization of the beaches.
Spectral Response Surfaces And The Ringing Response Of Offshore Structures, I Ketut Suastika
Spectral Response Surfaces And The Ringing Response Of Offshore Structures, I Ketut Suastika
Makara Journal of Technology
A method, called spectral response surface method, is proposed for the study of the ringing phenomenon of offshore structures. Newman’s results for diffraction force on a column were reformulated in terms of the frequency components of the ocean surface and their Hilbert transforms. Using a first-order reliability method together with a dynamic model for the structural response, it is straightforward to calculate the ocean surface history most likely to generate an extreme ringing response and the ringing response history.
Inelastic Performance Of Screw Connected Cfs Strap Braced Walls, Kostadin Velchev, Colin A. Rogers
Inelastic Performance Of Screw Connected Cfs Strap Braced Walls, Kostadin Velchev, Colin A. Rogers
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Site Response Zones And Short-Period Earthquake Ground Motion Projections For The Las Vegas Basin, Barbara Luke, Ying Liu
Site Response Zones And Short-Period Earthquake Ground Motion Projections For The Las Vegas Basin, Barbara Luke, Ying Liu
Civil and Environmental Engineering and Construction Faculty Research
A deterministic seismic hazard analysis was conducted to address the effect of local soil conditions on earthquake-induced strong ground motion in the Las Vegas Basin, Nevada (US). Using a large geological and geotechnical database, two response units were defined: a fine-grained unit, predominantly clay; and a coarse-grained unit, predominantly gravel. A moderate number of high-quality shallow shear wave velocity measurements were collected from which characteristic shear wave velocity profiles were developed for each response unit. An equivalent-linear one-dimensional site response model was used. The model was calibrated using a basin-wide, small-strain ground motion database. Calibration tests showed that ground motion …
Gbtul- A Code For The Buckling Analysis Of Cold-Formed Steel Members, Rui Bebiano, Nuno Silvestre, Dinar Camotim
Gbtul- A Code For The Buckling Analysis Of Cold-Formed Steel Members, Rui Bebiano, Nuno Silvestre, Dinar Camotim
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Stability Of Cold-Formed Steel Simple And Lipped Angles Under Compression, Jorge Muinaiar Neto, Maximiliano Malite, W. F. Maia
Stability Of Cold-Formed Steel Simple And Lipped Angles Under Compression, Jorge Muinaiar Neto, Maximiliano Malite, W. F. Maia
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Overview Of The Standard For Seismic Design Of Cold-Formed Steel Structural Systems - Special Bolted Moment Frames, Helen Chen, Chia-Ming Uang, Reidar Bjorhovde, Bonnie Manley
Overview Of The Standard For Seismic Design Of Cold-Formed Steel Structural Systems - Special Bolted Moment Frames, Helen Chen, Chia-Ming Uang, Reidar Bjorhovde, Bonnie Manley
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
19th International Specialty Conference: Recent Research And Developments In Cold-Formed Steel Structures, Wei-Wen Yu Center For Cold-Formed Steel Structures
19th International Specialty Conference: Recent Research And Developments In Cold-Formed Steel Structures, Wei-Wen Yu Center For Cold-Formed Steel Structures
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Floor System Design For Distortional Buckling Including Sheathing Restraint, Y. Guan, Benjamin W. Schafer, R. H. Sangree
Floor System Design For Distortional Buckling Including Sheathing Restraint, Y. Guan, Benjamin W. Schafer, R. H. Sangree
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Generalized Beam Theory Formulation Able To Capture Load Application And Localized Web Buckling Effects, Dinar Camotim, V. M. Zeinoddini, Nuno M. F. Silva
Generalized Beam Theory Formulation Able To Capture Load Application And Localized Web Buckling Effects, Dinar Camotim, V. M. Zeinoddini, Nuno M. F. Silva
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Impact Of Global Flexural Imperfections On The Cold-Formed Steel Column Curve, Benjamin W. Schafer, Benjamin W. Schafer
Impact Of Global Flexural Imperfections On The Cold-Formed Steel Column Curve, Benjamin W. Schafer, Benjamin W. Schafer
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Simplified Methods For Predicting Elastic Buckling Of Cold-Formed Steel Structural Members With Holes, Christopher D. Moen
Simplified Methods For Predicting Elastic Buckling Of Cold-Formed Steel Structural Members With Holes, Christopher D. Moen
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Computed Flexural Buckling Stress For Cold-Formed Stainless Steel Columns, Shin-Hua Lin, Chi-Ling Pan, Chih-Peng Yu
Computed Flexural Buckling Stress For Cold-Formed Stainless Steel Columns, Shin-Hua Lin, Chi-Ling Pan, Chih-Peng Yu
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Structural Analysis Of Scaffolding With The Plank And Anchor Rod During Construction, Jui-Ling Peng, Chi-Ling Pan, Kuan-Hung Chen, Siu-Lai Chan
Structural Analysis Of Scaffolding With The Plank And Anchor Rod During Construction, Jui-Ling Peng, Chi-Ling Pan, Kuan-Hung Chen, Siu-Lai Chan
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Buckling Studies Of Thin-Walled Channel Sections Under Combined Bending And Shear, Cao Hung Pham, Gregory J. Hancock
Buckling Studies Of Thin-Walled Channel Sections Under Combined Bending And Shear, Cao Hung Pham, Gregory J. Hancock
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Flexural Resistance Of Cold-Formed Steel Built-Up Box Sections Of Subjected To Eccentric Loading, L. Xu, P. Sultana
Flexural Resistance Of Cold-Formed Steel Built-Up Box Sections Of Subjected To Eccentric Loading, L. Xu, P. Sultana
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Simplified Models For Cross-Section Stress Demands On C-Section Purlins In Uplift, Maximiliano Malite, L. C. M. Vieira, Benjamin W. Schafer, S. K. Parikh
Simplified Models For Cross-Section Stress Demands On C-Section Purlins In Uplift, Maximiliano Malite, L. C. M. Vieira, Benjamin W. Schafer, S. K. Parikh
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Web Crippling Behaviour Of Thin-Walled Lipped Channel Beams Subjected To Eof And Etf Loading, M. Macdonald, Manoj A. Heiyantuduwa, J. Rhodes
Web Crippling Behaviour Of Thin-Walled Lipped Channel Beams Subjected To Eof And Etf Loading, M. Macdonald, Manoj A. Heiyantuduwa, J. Rhodes
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
State Of The Art Report On Thin-Walled Cold-Formed Profiled Steel Decking, N. A. Hedaoo, L. M. Gupta
State Of The Art Report On Thin-Walled Cold-Formed Profiled Steel Decking, N. A. Hedaoo, L. M. Gupta
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Aisi Committee On Specifications New Test Standard For Hold-Downs Attach To Cold-Formed Steel Structural Framing, Jeff Ellis
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Behavior Of Arc Spot Weld Connections Subjected To Combined Shear And Tension Forces, Laura K. Stirnemann, Roger A. Laboube
Behavior Of Arc Spot Weld Connections Subjected To Combined Shear And Tension Forces, Laura K. Stirnemann, Roger A. Laboube
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Pilot Research On Cold-Formed Steel Framed Shear Wall Assemblies With Corrugated Sheet Steel Sheathing, Hitesh Vora, Cheng Yu
Pilot Research On Cold-Formed Steel Framed Shear Wall Assemblies With Corrugated Sheet Steel Sheathing, Hitesh Vora, Cheng Yu
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Strength Of Arc Spot Welds Made In Single And Multiple Steel Sheets, Gregory L. Snow, Samuel Easterling
Strength Of Arc Spot Welds Made In Single And Multiple Steel Sheets, Gregory L. Snow, Samuel Easterling
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Testing And Evaluation Of Cfs L-Headers, Jesse Pauls, Lei Xu, S. R. Fox
Testing And Evaluation Of Cfs L-Headers, Jesse Pauls, Lei Xu, S. R. Fox
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.