IJET Vol. 5, Issue 2, June 2019
https://hdl.handle.net/11363/1388
International Journal of Engineering Technologies (IJET) Dergisi kayıtlarını içerir.2024-03-29T15:30:48ZInternational Journal of Engineering Technologies (IJET) Vol. 5, Issue 2, June 2019
https://hdl.handle.net/11363/2071
International Journal of Engineering Technologies (IJET) Vol. 5, Issue 2, June 2019
Bayram, Mustafa
Dear Colleagues,
On behalf of the editorial board of International Journal of Engineering Technologies (IJET), I
would like to share our happiness to publish the 18th issue of IJET. My special thanks are for
members of Editorial Board, Publication Board, Editorial Team, Referees, Authors and other
technical staff.
Please find the 18th issue of International Journal of Engineering Technologies at
http://ijet.gelisim.edu.tr or http://dergipark.gov.tr/ijet. We invite you to review the Table of
Contents by visiting our web site and review articles and items of interest. IJET will continue to
publish high level scientific research papers in the field of Engineering Technologies as an
international peer-reviewed scientific and academic journal of Istanbul Gelisim University.
Thanks for your continuing interest in our work,
Professor Mustafa BAYRAM
Istanbul Gelisim University
mbayram@gelisim.edu.tr
http://ijet.gelisim.edu.tr
http://dergipark.gov.tr/ijet
Printed ISSN: 2149-0104
e-ISSN: 2149-5262
2019-01-01T00:00:00ZNumerical Data Modelling and Classification in Marine Geology by the SPSS Statistics
https://hdl.handle.net/11363/1396
Numerical Data Modelling and Classification in Marine Geology by the SPSS Statistics
Lemenkova, Polina
The paper focuses on the geostatistical analysis of the data set on the Philippine archipelago. The research question is understanding variability in several geospatial parameters (geology, geomorphology, tectonics and bathymetry) in different segments of the study area. The initial data set was generated in QGIS by digitizing 25 cross-sectioning profiles. The data set contained information on the geospatial parameters in the samples by profiles. Modelling and statistical analysis were performed in SPSS IBM Statistics software. The analysis of the topography shows strong variability of the elevations in the samples with the extreme depths in the central part of the study area (profile 13 with -9,400 m) and highest elevations in its south-western part (profile 17 with 1950 m). The analysis of the geological classes and lithology shows maximal samples of the basic volcanic rocks (40,40%) followed by mixed sedimentary consolidated rocks (31,90 %). Pairwise analysis of the sediment thickness and slope aspect demonstrates correlation between these two variables with the maximal sediment layer in the profiles 1-4 crossing the Philippines. The hierarchical dendrogram clustering of the bathymetry by three approaches shown maximal correlation of 5 clusters containing profile groups: 12-18 (centre), 22-25 (south-west), 1-2 (north), 7-8 (north-east), 19-21 (south-west). Other profiles show lesser similarities in the bathymetric patterns. The forecasting models were computed for the geospatial variables showing gradual increase in the gradient angles southwards and increased values for the sediment thickness in the north. Technically, the results proved effectiveness of the SPSS application of the geological data modelling.
2019-06-30T00:00:00ZThe Compressive Strength Development of Alkali Activated Fly Ash/Slag Concretes with Different Alkali Activator Ratios
https://hdl.handle.net/11363/1395
The Compressive Strength Development of Alkali Activated Fly Ash/Slag Concretes with Different Alkali Activator Ratios
Niş, Anıl
Recently, geopolymer or alkali-activated concrete takes great attention due to low carbon footprint since fly ash and ground granulated blast furnace slag (industrial by-product materials) has been utilized as binder materials in the alkali-activated concrete. In this research, the compressive strength (CS) development of the alkali-activated fly ash/slag (AAFAS) concrete was investigated in an ambient environment at 7., 14., 28., and 56. days using alkali activator (sodium silicate to sodium hydroxide) ratios of 1, 1.5, 2, and 2.5 with 6M SH (low) concentration. In addition, the effect of delayed oven-curing condition was also studied at 56.day. The results indicated that for the ambient-cured specimens with 6M SH concentration, the maximum and minimum CS were reached in the AAFSS concrete with alkali activator (SS/SH) ratios of 2 and 1, respectively. The AAFAS concrete with an alkali activator ratio of 2.5 showed the lowest CS enhancement after 7.day and 14.day, while the AAFAS specimens with an alkali activator ratio of 1.5 performed the least CS improvement at 28.day in the ambient environment. Meanwhile, the highest CS enhancement was observed in the specimens with an alkali activator ratio of 2 for all ages. Due to the delayed oven-curing, the least and the highest CS enhancements were observed in the AAFAS specimens with alkali activator ratios of 2 and 1.5, respectively. The results pointed out that AAFAS concrete with a higher alkali activator ratio (≥2) should be used for structural applications in the ambient environment.
2019-06-30T00:00:00ZMathematical Model of the Traveling Salesman Problem with Delivery and Draft Limit
https://hdl.handle.net/11363/1394
Mathematical Model of the Traveling Salesman Problem with Delivery and Draft Limit
Mersin, Kadir; Nur, Cemile
In this paper, we determine the order of the ports to be reached with the help of graph theory and establish Hamilton cycles. We obtain sub-solutions and solution sets with the help of these cycles. Moreover, we prove some relations about the draft limit and the demand of the port. Finally we present some examples.
2019-06-30T00:00:00Z